Vendor import of llvm RELEASE_360/rc1 tag r226102 (effectively, 3.6.0 RC1):vendor/llvm/llvm-release_360-r226102

https://llvm.org/svn/llvm-project/llvm/tags/RELEASE_360/rc1@226102

167 files changed, 13126 insertions, 2442 deletions

diff --git a/tools/CMakeLists.txt b/tools/CMakeLists.txt
index 846ad1e25d62..7e9938119f5d 100644
--- a/tools/CMakeLists.txt
+++ b/tools/CMakeLists.txt
@@ -8,6 +8,12 @@ else(WITH_POLLY)
   list(APPEND LLVM_IMPLICIT_PROJECT_IGNORE "${LLVM_MAIN_SRC_DIR}/tools/polly")
 endif(WITH_POLLY)
 
+if( LLVM_BUILD_LLVM_DYLIB )
+  add_llvm_tool_subdirectory(llvm-shlib)
+else()
+  ignore_llvm_tool_subdirectory(llvm-shlib)
+endif()
+
 add_llvm_tool_subdirectory(opt)
 add_llvm_tool_subdirectory(llvm-as)
 add_llvm_tool_subdirectory(llvm-dis)
@@ -30,6 +36,8 @@ add_llvm_tool_subdirectory(llvm-objdump)
 add_llvm_tool_subdirectory(llvm-readobj)
 add_llvm_tool_subdirectory(llvm-rtdyld)
 add_llvm_tool_subdirectory(llvm-dwarfdump)
+add_llvm_tool_subdirectory(dsymutil)
+add_llvm_tool_subdirectory(llvm-vtabledump)
 if( LLVM_USE_INTEL_JITEVENTS )
   add_llvm_tool_subdirectory(llvm-jitlistener)
 else()
@@ -42,6 +50,8 @@ add_llvm_tool_subdirectory(llvm-bcanalyzer)
 add_llvm_tool_subdirectory(llvm-stress)
 add_llvm_tool_subdirectory(llvm-mcmarkup)
 
+add_llvm_tool_subdirectory(verify-uselistorder)
+
 add_llvm_tool_subdirectory(llvm-symbolizer)
 
 add_llvm_tool_subdirectory(llvm-c-test)
@@ -49,6 +59,8 @@ add_llvm_tool_subdirectory(llvm-c-test)
 add_llvm_tool_subdirectory(obj2yaml)
 add_llvm_tool_subdirectory(yaml2obj)
 
+add_llvm_tool_subdirectory(llvm-go)
+
 if(NOT CYGWIN AND LLVM_ENABLE_PIC)
   add_llvm_tool_subdirectory(lto)
   add_llvm_tool_subdirectory(llvm-lto)
@@ -57,19 +69,10 @@ else()
   ignore_llvm_tool_subdirectory(llvm-lto)
 endif()
 
-if( LLVM_ENABLE_PIC )
-  # TODO: support other systems:
-  if( (CMAKE_SYSTEM_NAME STREQUAL "Linux")
-      OR (CMAKE_SYSTEM_NAME STREQUAL "FreeBSD") )
-    add_llvm_tool_subdirectory(gold)
-  else()
-    ignore_llvm_tool_subdirectory(gold)
-  endif()
-else()
-  ignore_llvm_tool_subdirectory(gold)
-endif()
+add_llvm_tool_subdirectory(gold)
 
 add_llvm_external_project(clang)
+add_llvm_external_project(llgo)
 
 if( NOT LLVM_INCLUDE_TOOLS STREQUAL "bootstrap-only" )
   add_llvm_external_project(lld)
diff --git a/tools/LLVMBuild.txt b/tools/LLVMBuild.txt
index 1b537a372da3..53d4ffc28dc1 100644
--- a/tools/LLVMBuild.txt
+++ b/tools/LLVMBuild.txt
@@ -16,7 +16,7 @@
 ;===------------------------------------------------------------------------===;
 
 [common]
-subdirectories = bugpoint llc lli llvm-ar llvm-as llvm-bcanalyzer llvm-cov llvm-diff llvm-dis llvm-dwarfdump llvm-extract llvm-jitlistener llvm-link llvm-lto llvm-mc llvm-nm llvm-objdump llvm-profdata llvm-rtdyld llvm-size macho-dump opt llvm-mcmarkup
+subdirectories = bugpoint llc lli llvm-ar llvm-as llvm-bcanalyzer llvm-cov llvm-diff llvm-dis llvm-dwarfdump llvm-extract llvm-jitlistener llvm-link llvm-lto llvm-mc llvm-nm llvm-objdump llvm-profdata llvm-rtdyld llvm-size macho-dump opt llvm-mcmarkup verify-uselistorder dsymutil
 
 [component_0]
 type = Group
diff --git a/tools/Makefile b/tools/Makefile
index 97ad99a9d1a2..b559edacd52d 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -21,7 +21,8 @@ endif
 
 # Build LLD and LLDB if present. Note LLDB must be built last as it depends on
 # the wider LLVM infrastructure (including Clang).
-OPTIONAL_DIRS := lld lldb
+OPTIONAL_PARALLEL_DIRS += lld
+OPTIONAL_DIRS := lldb
 
 # NOTE: The tools are organized into five groups of four consisting of one
 # large and three small executables. This is done to minimize memory load
@@ -31,7 +32,8 @@ PARALLEL_DIRS := opt llvm-as llvm-dis llc llvm-ar llvm-nm llvm-link \
                  lli llvm-extract llvm-mc bugpoint llvm-bcanalyzer llvm-diff \
                  macho-dump llvm-objdump llvm-readobj llvm-rtdyld \
                  llvm-dwarfdump llvm-cov llvm-size llvm-stress llvm-mcmarkup \
-                 llvm-profdata llvm-symbolizer obj2yaml yaml2obj llvm-c-test
+                 llvm-profdata llvm-symbolizer obj2yaml yaml2obj llvm-c-test \
+                 llvm-vtabledump verify-uselistorder dsymutil
 
 # If Intel JIT Events support is configured, build an extra tool to test it.
 ifeq ($(USE_INTEL_JITEVENTS), 1)
@@ -72,4 +74,8 @@ ifneq ($(ENABLE_SHARED),1)
   endif
 endif
 
+ifneq (,$(filter go,$(BINDINGS_TO_BUILD)))
+  PARALLEL_DIRS += llvm-go
+endif
+
 include $(LEVEL)/Makefile.common
diff --git a/tools/bugpoint/BugDriver.cpp b/tools/bugpoint/BugDriver.cpp
index cecccbe0f0ef..b8be17e44dd2 100644
--- a/tools/bugpoint/BugDriver.cpp
+++ b/tools/bugpoint/BugDriver.cpp
@@ -82,14 +82,10 @@ BugDriver::~BugDriver() {
   delete gcc;
 }
 
-
-/// ParseInputFile - Given a bitcode or assembly input filename, parse and
-/// return it, or return null if not possible.
-///
-Module *llvm::ParseInputFile(const std::string &Filename,
-                             LLVMContext& Ctxt) {
+std::unique_ptr<Module> llvm::parseInputFile(StringRef Filename,
+                                             LLVMContext &Ctxt) {
   SMDiagnostic Err;
-  Module *Result = ParseIRFile(Filename, Err, Ctxt);
+  std::unique_ptr<Module> Result = parseIRFile(Filename, Err, Ctxt);
   if (!Result)
     Err.print("bugpoint", errs());
 
@@ -120,23 +116,18 @@ bool BugDriver::addSources(const std::vector<std::string> &Filenames) {
   assert(!Filenames.empty() && "Must specify at least on input filename!");
 
   // Load the first input file.
-  Program = ParseInputFile(Filenames[0], Context);
+  Program = parseInputFile(Filenames[0], Context).release();
   if (!Program) return true;
 
   outs() << "Read input file      : '" << Filenames[0] << "'\n";
 
   for (unsigned i = 1, e = Filenames.size(); i != e; ++i) {
-    std::unique_ptr<Module> M(ParseInputFile(Filenames[i], Context));
+    std::unique_ptr<Module> M = parseInputFile(Filenames[i], Context);
     if (!M.get()) return true;
 
     outs() << "Linking in input file: '" << Filenames[i] << "'\n";
-    std::string ErrorMessage;
-    if (Linker::LinkModules(Program, M.get(), Linker::DestroySource,
-                            &ErrorMessage)) {
-      errs() << ToolName << ": error linking in '" << Filenames[i] << "': "
-             << ErrorMessage << '\n';
+    if (Linker::LinkModules(Program, M.get()))
       return true;
-    }
   }
 
   outs() << "*** All input ok\n";
diff --git a/tools/bugpoint/BugDriver.h b/tools/bugpoint/BugDriver.h
index 3169d293da02..579781246c54 100644
--- a/tools/bugpoint/BugDriver.h
+++ b/tools/bugpoint/BugDriver.h
@@ -13,11 +13,12 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef BUGDRIVER_H
-#define BUGDRIVER_H
+#ifndef LLVM_TOOLS_BUGPOINT_BUGDRIVER_H
+#define LLVM_TOOLS_BUGPOINT_BUGDRIVER_H
 
 #include "llvm/IR/ValueMap.h"
 #include "llvm/Transforms/Utils/ValueMapper.h"
+#include <memory>
 #include <string>
 #include <vector>
 
@@ -210,41 +211,46 @@ public:
   void EmitProgressBitcode(const Module *M, const std::string &ID,
                            bool NoFlyer = false) const;
 
-  /// deleteInstructionFromProgram - This method clones the current Program and
-  /// deletes the specified instruction from the cloned module.  It then runs a
-  /// series of cleanup passes (ADCE and SimplifyCFG) to eliminate any code
-  /// which depends on the value.  The modified module is then returned.
+  /// This method clones the current Program and deletes the specified
+  /// instruction from the cloned module.  It then runs a series of cleanup
+  /// passes (ADCE and SimplifyCFG) to eliminate any code which depends on the
+  /// value. The modified module is then returned.
   ///
-  Module *deleteInstructionFromProgram(const Instruction *I, unsigned Simp);
+  std::unique_ptr<Module> deleteInstructionFromProgram(const Instruction *I,
+                                                       unsigned Simp);
 
-  /// performFinalCleanups - This method clones the current Program and performs
-  /// a series of cleanups intended to get rid of extra cruft on the module.  If
-  /// the MayModifySemantics argument is true, then the cleanups is allowed to
+  /// This method clones the current Program and performs a series of cleanups
+  /// intended to get rid of extra cruft on the module. If the
+  /// MayModifySemantics argument is true, then the cleanups is allowed to
   /// modify how the code behaves.
   ///
-  Module *performFinalCleanups(Module *M, bool MayModifySemantics = false);
-
-  /// ExtractLoop - Given a module, extract up to one loop from it into a new
-  /// function.  This returns null if there are no extractable loops in the
-  /// program or if the loop extractor crashes.
-  Module *ExtractLoop(Module *M);
-
-  /// ExtractMappedBlocksFromModule - Extract all but the specified basic blocks
-  /// into their own functions.  The only detail is that M is actually a module
-  /// cloned from the one the BBs are in, so some mapping needs to be performed.
-  /// If this operation fails for some reason (ie the implementation is buggy),
-  /// this function should return null, otherwise it returns a new Module.
-  Module *ExtractMappedBlocksFromModule(const std::vector<BasicBlock*> &BBs,
-                                        Module *M);
-
-  /// runPassesOn - Carefully run the specified set of pass on the specified
-  /// module, returning the transformed module on success, or a null pointer on
-  /// failure.  If AutoDebugCrashes is set to true, then bugpoint will
-  /// automatically attempt to track down a crashing pass if one exists, and
-  /// this method will never return null.
-  Module *runPassesOn(Module *M, const std::vector<std::string> &Passes,
-                      bool AutoDebugCrashes = false, unsigned NumExtraArgs = 0,
-                      const char * const *ExtraArgs = nullptr);
+  std::unique_ptr<Module> performFinalCleanups(Module *M,
+                                               bool MayModifySemantics = false);
+
+  /// Given a module, extract up to one loop from it into a new function. This
+  /// returns null if there are no extractable loops in the program or if the
+  /// loop extractor crashes.
+  std::unique_ptr<Module> extractLoop(Module *M);
+
+  /// Extract all but the specified basic blocks into their own functions. The
+  /// only detail is that M is actually a module cloned from the one the BBs are
+  /// in, so some mapping needs to be performed. If this operation fails for
+  /// some reason (ie the implementation is buggy), this function should return
+  /// null, otherwise it returns a new Module.
+  std::unique_ptr<Module>
+  extractMappedBlocksFromModule(const std::vector<BasicBlock *> &BBs,
+                                Module *M);
+
+  /// Carefully run the specified set of pass on the specified/ module,
+  /// returning the transformed module on success, or a null pointer on failure.
+  /// If AutoDebugCrashes is set to true, then bugpoint will automatically
+  /// attempt to track down a crashing pass if one exists, and this method will
+  /// never return null.
+  std::unique_ptr<Module> runPassesOn(Module *M,
+                                      const std::vector<std::string> &Passes,
+                                      bool AutoDebugCrashes = false,
+                                      unsigned NumExtraArgs = 0,
+                                      const char *const *ExtraArgs = nullptr);
 
   /// runPasses - Run the specified passes on Program, outputting a bitcode
   /// file and writting the filename into OutputFile if successful.  If the
@@ -296,12 +302,11 @@ private:
   bool initializeExecutionEnvironment();
 };
 
-/// ParseInputFile - Given a bitcode or assembly input filename, parse and
-/// return it, or return null if not possible.
+///  Given a bitcode or assembly input filename, parse and return it, or return
+///  null if not possible.
 ///
-Module *ParseInputFile(const std::string &InputFilename,
-                       LLVMContext& ctxt);
-
+std::unique_ptr<Module> parseInputFile(StringRef InputFilename,
+                                       LLVMContext &ctxt);
 
 /// getPassesString - Turn a list of passes into a string which indicates the
 /// command line options that must be passed to add the passes.
diff --git a/tools/bugpoint/CrashDebugger.cpp b/tools/bugpoint/CrashDebugger.cpp
index 8bd61b3c0964..bac948aaf3ab 100644
--- a/tools/bugpoint/CrashDebugger.cpp
+++ b/tools/bugpoint/CrashDebugger.cpp
@@ -72,7 +72,7 @@ ReducePassList::doTest(std::vector<std::string> &Prefix,
 
     OrigProgram = BD.Program;
 
-    BD.Program = ParseInputFile(PrefixOutput, BD.getContext());
+    BD.Program = parseInputFile(PrefixOutput, BD.getContext()).release();
     if (BD.Program == nullptr) {
       errs() << BD.getToolName() << ": Error reading bitcode file '"
              << PrefixOutput << "'!\n";
@@ -312,22 +312,21 @@ bool ReduceCrashingBlocks::TestBlocks(std::vector<const BasicBlock*> &BBs) {
   // have to take.
   std::vector<std::pair<std::string, std::string> > BlockInfo;
 
-  for (SmallPtrSet<BasicBlock*, 8>::iterator I = Blocks.begin(),
-         E = Blocks.end(); I != E; ++I)
-    BlockInfo.push_back(std::make_pair((*I)->getParent()->getName(),
-                                       (*I)->getName()));
+  for (BasicBlock *BB : Blocks)
+    BlockInfo.push_back(std::make_pair(BB->getParent()->getName(),
+                                       BB->getName()));
 
   // Now run the CFG simplify pass on the function...
   std::vector<std::string> Passes;
   Passes.push_back("simplifycfg");
   Passes.push_back("verify");
-  Module *New = BD.runPassesOn(M, Passes);
+  std::unique_ptr<Module> New = BD.runPassesOn(M, Passes);
   delete M;
   if (!New) {
     errs() << "simplifycfg failed!\n";
     exit(1);
   }
-  M = New;
+  M = New.release();
 
   // Try running on the hacked up program...
   if (TestFn(BD, M)) {
@@ -420,9 +419,8 @@ bool ReduceCrashingInstructions::TestInsts(std::vector<const Instruction*>
     // Make sure to use instruction pointers that point into the now-current
     // module, and that they don't include any deleted blocks.
     Insts.clear();
-    for (SmallPtrSet<Instruction*, 64>::const_iterator I = Instructions.begin(),
-             E = Instructions.end(); I != E; ++I)
-      Insts.push_back(*I);
+    for (Instruction *Inst : Instructions)
+      Insts.push_back(Inst);
     return true;
   }
   delete M;  // It didn't crash, try something else.
@@ -578,20 +576,17 @@ static bool DebugACrash(BugDriver &BD,
                 continue;
 
               outs() << "Checking instruction: " << *I;
-              Module *M = BD.deleteInstructionFromProgram(I, Simplification);
+              std::unique_ptr<Module> M =
+                  BD.deleteInstructionFromProgram(I, Simplification);
 
               // Find out if the pass still crashes on this pass...
-              if (TestFn(BD, M)) {
+              if (TestFn(BD, M.get())) {
                 // Yup, it does, we delete the old module, and continue trying
                 // to reduce the testcase...
-                BD.setNewProgram(M);
+                BD.setNewProgram(M.release());
                 InstructionsToSkipBeforeDeleting = CurInstructionNum;
                 goto TryAgain;  // I wish I had a multi-level break here!
               }
-
-              // This pass didn't crash without this instruction, try the next
-              // one.
-              delete M;
             }
           }
 
@@ -607,7 +602,7 @@ ExitLoops:
   if (!BugpointIsInterrupted) {
     outs() << "\n*** Attempting to perform final cleanups: ";
     Module *M = CloneModule(BD.getProgram());
-    M = BD.performFinalCleanups(M, true);
+    M = BD.performFinalCleanups(M, true).release();
 
     // Find out if the pass still crashes on the cleaned up program...
     if (TestFn(BD, M)) {
diff --git a/tools/bugpoint/ExtractFunction.cpp b/tools/bugpoint/ExtractFunction.cpp
index 4fb68566ac62..34fe53c08112 100644
--- a/tools/bugpoint/ExtractFunction.cpp
+++ b/tools/bugpoint/ExtractFunction.cpp
@@ -82,13 +82,9 @@ namespace {
   }
 }  // end anonymous namespace
 
-/// deleteInstructionFromProgram - This method clones the current Program and
-/// deletes the specified instruction from the cloned module.  It then runs a
-/// series of cleanup passes (ADCE and SimplifyCFG) to eliminate any code which
-/// depends on the value.  The modified module is then returned.
-///
-Module *BugDriver::deleteInstructionFromProgram(const Instruction *I,
-                                                unsigned Simplification) {
+std::unique_ptr<Module>
+BugDriver::deleteInstructionFromProgram(const Instruction *I,
+                                        unsigned Simplification) {
   // FIXME, use vmap?
   Module *Clone = CloneModule(Program);
 
@@ -123,7 +119,7 @@ Module *BugDriver::deleteInstructionFromProgram(const Instruction *I,
     Passes.push_back("simplifycfg");      // Delete dead control flow
 
   Passes.push_back("verify");
-  Module *New = runPassesOn(Clone, Passes);
+  std::unique_ptr<Module> New = runPassesOn(Clone, Passes);
   delete Clone;
   if (!New) {
     errs() << "Instruction removal failed.  Sorry. :(  Please report a bug!\n";
@@ -132,11 +128,8 @@ Module *BugDriver::deleteInstructionFromProgram(const Instruction *I,
   return New;
 }
 
-/// performFinalCleanups - This method clones the current Program and performs
-/// a series of cleanups intended to get rid of extra cruft on the module
-/// before handing it to the user.
-///
-Module *BugDriver::performFinalCleanups(Module *M, bool MayModifySemantics) {
+std::unique_ptr<Module>
+BugDriver::performFinalCleanups(Module *M, bool MayModifySemantics) {
   // Make all functions external, so GlobalDCE doesn't delete them...
   for (Module::iterator I = M->begin(), E = M->end(); I != E; ++I)
     I->setLinkage(GlobalValue::ExternalLinkage);
@@ -149,24 +142,20 @@ Module *BugDriver::performFinalCleanups(Module *M, bool MayModifySemantics) {
   else
     CleanupPasses.push_back("deadargelim");
 
-  Module *New = runPassesOn(M, CleanupPasses);
+  std::unique_ptr<Module> New = runPassesOn(M, CleanupPasses);
   if (!New) {
     errs() << "Final cleanups failed.  Sorry. :(  Please report a bug!\n";
-    return M;
+    return nullptr;
   }
   delete M;
   return New;
 }
 
-
-/// ExtractLoop - Given a module, extract up to one loop from it into a new
-/// function.  This returns null if there are no extractable loops in the
-/// program or if the loop extractor crashes.
-Module *BugDriver::ExtractLoop(Module *M) {
+std::unique_ptr<Module> BugDriver::extractLoop(Module *M) {
   std::vector<std::string> LoopExtractPasses;
   LoopExtractPasses.push_back("loop-extract-single");
 
-  Module *NewM = runPassesOn(M, LoopExtractPasses);
+  std::unique_ptr<Module> NewM = runPassesOn(M, LoopExtractPasses);
   if (!NewM) {
     outs() << "*** Loop extraction failed: ";
     EmitProgressBitcode(M, "loopextraction", true);
@@ -179,7 +168,6 @@ Module *BugDriver::ExtractLoop(Module *M) {
   // to avoid taking forever.
   static unsigned NumExtracted = 32;
   if (M->size() == NewM->size() || --NumExtracted == 0) {
-    delete NewM;
     return nullptr;
   } else {
     assert(M->size() < NewM->size() && "Loop extract removed functions?");
@@ -356,14 +344,9 @@ llvm::SplitFunctionsOutOfModule(Module *M,
 // Basic Block Extraction Code
 //===----------------------------------------------------------------------===//
 
-/// ExtractMappedBlocksFromModule - Extract all but the specified basic blocks
-/// into their own functions.  The only detail is that M is actually a module
-/// cloned from the one the BBs are in, so some mapping needs to be performed.
-/// If this operation fails for some reason (ie the implementation is buggy),
-/// this function should return null, otherwise it returns a new Module.
-Module *BugDriver::ExtractMappedBlocksFromModule(const
-                                                 std::vector<BasicBlock*> &BBs,
-                                                 Module *M) {
+std::unique_ptr<Module>
+BugDriver::extractMappedBlocksFromModule(const std::vector<BasicBlock *> &BBs,
+                                         Module *M) {
   SmallString<128> Filename;
   int FD;
   std::error_code EC = sys::fs::createUniqueFile(
@@ -401,7 +384,7 @@ Module *BugDriver::ExtractMappedBlocksFromModule(const
 
   std::vector<std::string> PI;
   PI.push_back("extract-blocks");
-  Module *Ret = runPassesOn(M, PI, false, 1, &ExtraArg);
+  std::unique_ptr<Module> Ret = runPassesOn(M, PI, false, 1, &ExtraArg);
 
   sys::fs::remove(Filename.c_str());
 
diff --git a/tools/bugpoint/ListReducer.h b/tools/bugpoint/ListReducer.h
index 8083e2d65fb1..a0bb570a5cb2 100644
--- a/tools/bugpoint/ListReducer.h
+++ b/tools/bugpoint/ListReducer.h
@@ -12,8 +12,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef BUGPOINT_LIST_REDUCER_H
-#define BUGPOINT_LIST_REDUCER_H
+#ifndef LLVM_TOOLS_BUGPOINT_LISTREDUCER_H
+#define LLVM_TOOLS_BUGPOINT_LISTREDUCER_H
 
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/raw_ostream.h"
diff --git a/tools/bugpoint/Miscompilation.cpp b/tools/bugpoint/Miscompilation.cpp
index 3f1f84ef6244..8cb45838773a 100644
--- a/tools/bugpoint/Miscompilation.cpp
+++ b/tools/bugpoint/Miscompilation.cpp
@@ -128,8 +128,8 @@ ReduceMiscompilingPasses::doTest(std::vector<std::string> &Prefix,
   // Ok, so now we know that the prefix passes work, try running the suffix
   // passes on the result of the prefix passes.
   //
-  std::unique_ptr<Module> PrefixOutput(
-      ParseInputFile(BitcodeResult, BD.getContext()));
+  std::unique_ptr<Module> PrefixOutput =
+      parseInputFile(BitcodeResult, BD.getContext());
   if (!PrefixOutput) {
     errs() << BD.getToolName() << ": Error reading bitcode file '"
            << BitcodeResult << "'!\n";
@@ -218,16 +218,12 @@ static Module *TestMergedProgram(const BugDriver &BD, Module *M1, Module *M2,
                                  bool DeleteInputs, std::string &Error,
                                  bool &Broken) {
   // Link the two portions of the program back to together.
-  std::string ErrorMsg;
   if (!DeleteInputs) {
     M1 = CloneModule(M1);
     M2 = CloneModule(M2);
   }
-  if (Linker::LinkModules(M1, M2, Linker::DestroySource, &ErrorMsg)) {
-    errs() << BD.getToolName() << ": Error linking modules together:"
-           << ErrorMsg << '\n';
+  if (Linker::LinkModules(M1, M2))
     exit(1);
-  }
   delete M2;   // We are done with this module.
 
   // Execute the program.
@@ -316,7 +312,7 @@ static bool ExtractLoops(BugDriver &BD,
     Module *ToOptimize = SplitFunctionsOutOfModule(ToNotOptimize,
                                                    MiscompiledFunctions,
                                                    VMap);
-    Module *ToOptimizeLoopExtracted = BD.ExtractLoop(ToOptimize);
+    Module *ToOptimizeLoopExtracted = BD.extractLoop(ToOptimize).release();
     if (!ToOptimizeLoopExtracted) {
       // If the loop extractor crashed or if there were no extractible loops,
       // then this chapter of our odyssey is over with.
@@ -334,8 +330,8 @@ static bool ExtractLoops(BugDriver &BD,
     // extraction.
     AbstractInterpreter *AI = BD.switchToSafeInterpreter();
     bool Failure;
-    Module *New = TestMergedProgram(BD, ToOptimizeLoopExtracted, ToNotOptimize,
-                                    false, Error, Failure);
+    Module *New = TestMergedProgram(BD, ToOptimizeLoopExtracted,
+                                    ToNotOptimize, false, Error, Failure);
     if (!New)
       return false;
 
@@ -364,7 +360,6 @@ static bool ExtractLoops(BugDriver &BD,
              << OutputPrefix << "-loop-extract-fail-*.bc files.\n";
       delete ToOptimize;
       delete ToNotOptimize;
-      delete ToOptimizeLoopExtracted;
       return MadeChange;
     }
     delete ToOptimize;
@@ -397,13 +392,8 @@ static bool ExtractLoops(BugDriver &BD,
                                                   F->getFunctionType()));
       }
 
-      std::string ErrorMsg;
-      if (Linker::LinkModules(ToNotOptimize, ToOptimizeLoopExtracted, 
-                              Linker::DestroySource, &ErrorMsg)){
-        errs() << BD.getToolName() << ": Error linking modules together:"
-               << ErrorMsg << '\n';
+      if (Linker::LinkModules(ToNotOptimize, ToOptimizeLoopExtracted))
         exit(1);
-      }
 
       MiscompiledFunctions.clear();
       for (unsigned i = 0, e = MisCompFunctions.size(); i != e; ++i) {
@@ -431,13 +421,9 @@ static bool ExtractLoops(BugDriver &BD,
     // extraction both didn't break the program, and didn't mask the problem.
     // Replace the current program with the loop extracted version, and try to
     // extract another loop.
-    std::string ErrorMsg;
-    if (Linker::LinkModules(ToNotOptimize, ToOptimizeLoopExtracted, 
-                            Linker::DestroySource, &ErrorMsg)){
-      errs() << BD.getToolName() << ": Error linking modules together:"
-             << ErrorMsg << '\n';
+    if (Linker::LinkModules(ToNotOptimize, ToOptimizeLoopExtracted))
       exit(1);
-    }
+
     delete ToOptimizeLoopExtracted;
 
     // All of the Function*'s in the MiscompiledFunctions list are in the old
@@ -533,11 +519,12 @@ bool ReduceMiscompiledBlocks::TestFuncs(const std::vector<BasicBlock*> &BBs,
 
   // Try the extraction.  If it doesn't work, then the block extractor crashed
   // or something, in which case bugpoint can't chase down this possibility.
-  if (Module *New = BD.ExtractMappedBlocksFromModule(BBsOnClone, ToOptimize)) {
+  if (std::unique_ptr<Module> New =
+          BD.extractMappedBlocksFromModule(BBsOnClone, ToOptimize)) {
     delete ToOptimize;
     // Run the predicate,
     // note that the predicate will delete both input modules.
-    bool Ret = TestFn(BD, New, ToNotOptimize, Error);
+    bool Ret = TestFn(BD, New.get(), ToNotOptimize, Error);
     delete BD.swapProgramIn(Orig);
     return Ret;
   }
@@ -591,7 +578,8 @@ static bool ExtractBlocks(BugDriver &BD,
   Module *ToExtract = SplitFunctionsOutOfModule(ProgClone,
                                                 MiscompiledFunctions,
                                                 VMap);
-  Module *Extracted = BD.ExtractMappedBlocksFromModule(Blocks, ToExtract);
+  std::unique_ptr<Module> Extracted =
+      BD.extractMappedBlocksFromModule(Blocks, ToExtract);
   if (!Extracted) {
     // Weird, extraction should have worked.
     errs() << "Nondeterministic problem extracting blocks??\n";
@@ -611,14 +599,8 @@ static bool ExtractBlocks(BugDriver &BD,
       MisCompFunctions.push_back(std::make_pair(I->getName(),
                                                 I->getFunctionType()));
 
-  std::string ErrorMsg;
-  if (Linker::LinkModules(ProgClone, Extracted, Linker::DestroySource, 
-                          &ErrorMsg)) {
-    errs() << BD.getToolName() << ": Error linking modules together:"
-           << ErrorMsg << '\n';
+  if (Linker::LinkModules(ProgClone, Extracted.get()))
     exit(1);
-  }
-  delete Extracted;
 
   // Set the new program and delete the old one.
   BD.setNewProgram(ProgClone);
@@ -730,14 +712,15 @@ static bool TestOptimizer(BugDriver &BD, Module *Test, Module *Safe,
   // Run the optimization passes on ToOptimize, producing a transformed version
   // of the functions being tested.
   outs() << "  Optimizing functions being tested: ";
-  Module *Optimized = BD.runPassesOn(Test, BD.getPassesToRun(),
-                                     /*AutoDebugCrashes*/true);
+  std::unique_ptr<Module> Optimized = BD.runPassesOn(Test, BD.getPassesToRun(),
+                                                     /*AutoDebugCrashes*/ true);
   outs() << "done.\n";
   delete Test;
 
   outs() << "  Checking to see if the merged program executes correctly: ";
   bool Broken;
-  Module *New = TestMergedProgram(BD, Optimized, Safe, true, Error, Broken);
+  Module *New =
+      TestMergedProgram(BD, Optimized.get(), Safe, true, Error, Broken);
   if (New) {
     outs() << (Broken ? " nope.\n" : " yup.\n");
     // Delete the original and set the new program.
@@ -796,7 +779,7 @@ void BugDriver::debugMiscompilation(std::string *Error) {
 static void CleanupAndPrepareModules(BugDriver &BD, Module *&Test,
                                      Module *Safe) {
   // Clean up the modules, removing extra cruft that we don't need anymore...
-  Test = BD.performFinalCleanups(Test);
+  Test = BD.performFinalCleanups(Test).release();
 
   // If we are executing the JIT, we have several nasty issues to take care of.
   if (!BD.isExecutingJIT()) return;
diff --git a/tools/bugpoint/OptimizerDriver.cpp b/tools/bugpoint/OptimizerDriver.cpp
index d452fd94c06a..f197cc53926a 100644
--- a/tools/bugpoint/OptimizerDriver.cpp
+++ b/tools/bugpoint/OptimizerDriver.cpp
@@ -66,15 +66,15 @@ static bool writeProgramToFileAux(tool_output_file &Out, const Module *M) {
 
 bool BugDriver::writeProgramToFile(const std::string &Filename, int FD,
                                    const Module *M) const {
-  tool_output_file Out(Filename.c_str(), FD);
+  tool_output_file Out(Filename, FD);
   return writeProgramToFileAux(Out, M);
 }
 
 bool BugDriver::writeProgramToFile(const std::string &Filename,
                                    const Module *M) const {
-  std::string ErrInfo;
-  tool_output_file Out(Filename.c_str(), ErrInfo, sys::fs::F_None);
-  if (ErrInfo.empty())
+  std::error_code EC;
+  tool_output_file Out(Filename, EC, sys::fs::F_None);
+  if (!EC)
     return writeProgramToFileAux(Out, M);
   return true;
 }
@@ -149,7 +149,7 @@ bool BugDriver::runPasses(Module *Program,
     return 1;
   }
 
-  tool_output_file InFile(InputFilename.c_str(), InputFD);
+  tool_output_file InFile(InputFilename, InputFD);
 
   WriteBitcodeToFile(Program, InFile.os());
   InFile.os().close();
@@ -159,12 +159,31 @@ bool BugDriver::runPasses(Module *Program,
     return 1;
   }
 
-  std::string tool = OptCmd.empty()? sys::FindProgramByName("opt") : OptCmd;
+  std::string tool = OptCmd;
+  if (OptCmd.empty()) {
+    if (ErrorOr<std::string> Path = sys::findProgramByName("opt"))
+      tool = *Path;
+    else
+      errs() << Path.getError().message() << "\n";
+  }
   if (tool.empty()) {
     errs() << "Cannot find `opt' in PATH!\n";
     return 1;
   }
 
+  std::string Prog;
+  if (UseValgrind) {
+    if (ErrorOr<std::string> Path = sys::findProgramByName("valgrind"))
+      Prog = *Path;
+    else
+      errs() << Path.getError().message() << "\n";
+  } else
+    Prog = tool;
+  if (Prog.empty()) {
+    errs() << "Cannot find `valgrind' in PATH!\n";
+    return 1;
+  }
+
   // Ok, everything that could go wrong before running opt is done.
   InFile.keep();
 
@@ -204,12 +223,6 @@ bool BugDriver::runPasses(Module *Program,
         errs() << "\n";
         );
 
-  std::string Prog;
-  if (UseValgrind)
-    Prog = sys::FindProgramByName("valgrind");
-  else
-    Prog = tool;
-
   // Redirect stdout and stderr to nowhere if SilencePasses is given
   StringRef Nowhere;
   const StringRef *Redirects[3] = {nullptr, &Nowhere, &Nowhere};
@@ -247,13 +260,10 @@ bool BugDriver::runPasses(Module *Program,
 }
 
 
-/// runPassesOn - Carefully run the specified set of pass on the specified
-/// module, returning the transformed module on success, or a null pointer on
-/// failure.
-Module *BugDriver::runPassesOn(Module *M,
-                               const std::vector<std::string> &Passes,
-                               bool AutoDebugCrashes, unsigned NumExtraArgs,
-                               const char * const *ExtraArgs) {
+std::unique_ptr<Module>
+BugDriver::runPassesOn(Module *M, const std::vector<std::string> &Passes,
+                       bool AutoDebugCrashes, unsigned NumExtraArgs,
+                       const char *const *ExtraArgs) {
   std::string BitcodeResult;
   if (runPasses(M, Passes, BitcodeResult, false/*delete*/, true/*quiet*/,
                 NumExtraArgs, ExtraArgs)) {
@@ -267,7 +277,7 @@ Module *BugDriver::runPassesOn(Module *M,
     return nullptr;
   }
 
-  Module *Ret = ParseInputFile(BitcodeResult, Context);
+  std::unique_ptr<Module> Ret = parseInputFile(BitcodeResult, Context);
   if (!Ret) {
     errs() << getToolName() << ": Error reading bitcode file '"
            << BitcodeResult << "'!\n";
diff --git a/tools/bugpoint/ToolRunner.cpp b/tools/bugpoint/ToolRunner.cpp
index a28b2856f1e9..51091e297d7d 100644
--- a/tools/bugpoint/ToolRunner.cpp
+++ b/tools/bugpoint/ToolRunner.cpp
@@ -141,21 +141,13 @@ static std::string ProcessFailure(StringRef ProgPath, const char** Args,
 
   // Rerun the compiler, capturing any error messages to print them.
   SmallString<128> ErrorFilename;
-  int ErrorFD;
   std::error_code EC = sys::fs::createTemporaryFile(
-      "bugpoint.program_error_messages", "", ErrorFD, ErrorFilename);
+      "bugpoint.program_error_messages", "", ErrorFilename);
   if (EC) {
     errs() << "Error making unique filename: " << EC.message() << "\n";
     exit(1);
   }
 
-#ifdef _WIN32
-  // Close ErrorFD immediately, or it couldn't be reopened on Win32.
-  // FIXME: We may have an option in openFileForWrite(), not to use ResultFD
-  // but to close it.
-  delete new raw_fd_ostream(ErrorFD, true);
-#endif
-
   RunProgramWithTimeout(ProgPath, Args, "", ErrorFilename.str(),
                         ErrorFilename.str(), Timeout, MemoryLimit);
   // FIXME: check return code ?
@@ -435,13 +427,14 @@ static void lexCommand(std::string &Message, const std::string &CommandLine,
     pos = CommandLine.find_first_of(delimiters, lastPos);
   }
 
-  CmdPath = sys::FindProgramByName(Command);
-  if (CmdPath.empty()) {
+  auto Path = sys::findProgramByName(Command);
+  if (!Path) {
     Message =
       std::string("Cannot find '") + Command +
-      "' in PATH!\n";
+      "' in PATH: " + Path.getError().message() + "\n";
     return;
   }
+  CmdPath = *Path;
 
   Message = "Found command in: " + CmdPath + "\n";
 }
@@ -915,16 +908,24 @@ int GCC::MakeSharedObject(const std::string &InputFile, FileType fileType,
 GCC *GCC::create(std::string &Message,
                  const std::string &GCCBinary,
                  const std::vector<std::string> *Args) {
-  std::string GCCPath = sys::FindProgramByName(GCCBinary);
-  if (GCCPath.empty()) {
-    Message = "Cannot find `"+ GCCBinary +"' in PATH!\n";
+  auto GCCPath = sys::findProgramByName(GCCBinary);
+  if (!GCCPath) {
+    Message = "Cannot find `" + GCCBinary + "' in PATH: " +
+              GCCPath.getError().message() + "\n";
     return nullptr;
   }
 
   std::string RemoteClientPath;
-  if (!RemoteClient.empty())
-    RemoteClientPath = sys::FindProgramByName(RemoteClient);
+  if (!RemoteClient.empty()) {
+    auto Path = sys::findProgramByName(RemoteClient);
+    if (!Path) {
+      Message = "Cannot find `" + RemoteClient + "' in PATH: " +
+                Path.getError().message() + "\n";
+      return nullptr;
+    }
+    RemoteClientPath = *Path;
+  }
 
-  Message = "Found gcc: " + GCCPath + "\n";
-  return new GCC(GCCPath, RemoteClientPath, Args);
+  Message = "Found gcc: " + *GCCPath + "\n";
+  return new GCC(*GCCPath, RemoteClientPath, Args);
 }
diff --git a/tools/bugpoint/ToolRunner.h b/tools/bugpoint/ToolRunner.h
index 6e7b95c7847b..454724ace5ce 100644
--- a/tools/bugpoint/ToolRunner.h
+++ b/tools/bugpoint/ToolRunner.h
@@ -14,8 +14,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef BUGPOINT_TOOLRUNNER_H
-#define BUGPOINT_TOOLRUNNER_H
+#ifndef LLVM_TOOLS_BUGPOINT_TOOLRUNNER_H
+#define LLVM_TOOLS_BUGPOINT_TOOLRUNNER_H
 
 #include "llvm/ADT/Triple.h"
 #include "llvm/Support/CommandLine.h"
diff --git a/tools/bugpoint/bugpoint.cpp b/tools/bugpoint/bugpoint.cpp
index c7dae0f45b66..d0bade507d2a 100644
--- a/tools/bugpoint/bugpoint.cpp
+++ b/tools/bugpoint/bugpoint.cpp
@@ -63,10 +63,6 @@ static cl::list<const PassInfo*, bool, PassNameParser>
 PassList(cl::desc("Passes available:"), cl::ZeroOrMore);
 
 static cl::opt<bool>
-StandardCompileOpts("std-compile-opts",
-                   cl::desc("Include the standard compile time optimizations"));
-
-static cl::opt<bool>
 StandardLinkOpts("std-link-opts",
                  cl::desc("Include the standard link time optimizations"));
 
@@ -170,17 +166,11 @@ int main(int argc, char **argv) {
   if (D.addSources(InputFilenames)) return 1;
 
   AddToDriver PM(D);
-  if (StandardCompileOpts) {
-    PassManagerBuilder Builder;
-    Builder.OptLevel = 3;
-    Builder.Inliner = createFunctionInliningPass();
-    Builder.populateModulePassManager(PM);
-  }
 
   if (StandardLinkOpts) {
     PassManagerBuilder Builder;
-    Builder.populateLTOPassManager(PM, /*Internalize=*/true,
-                                   /*RunInliner=*/true);
+    Builder.Inliner = createFunctionInliningPass();
+    Builder.populateLTOPassManager(PM);
   }
 
   if (OptLevelO1 || OptLevelO2 || OptLevelO3) {
diff --git a/tools/dsymutil/BinaryHolder.cpp b/tools/dsymutil/BinaryHolder.cpp
new file mode 100644
index 000000000000..ad66105bc249
--- /dev/null
+++ b/tools/dsymutil/BinaryHolder.cpp
@@ -0,0 +1,111 @@
+//===-- BinaryHolder.cpp --------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This program is a utility that aims to be a dropin replacement for
+// Darwin's dsymutil.
+//
+//===----------------------------------------------------------------------===//
+
+#include "BinaryHolder.h"
+#include "llvm/Support/raw_ostream.h"
+
+namespace llvm {
+namespace dsymutil {
+
+ErrorOr<MemoryBufferRef>
+BinaryHolder::GetMemoryBufferForFile(StringRef Filename) {
+  if (Verbose)
+    outs() << "trying to open '" << Filename << "'\n";
+
+  // Try that first as it doesn't involve any filesystem access.
+  if (auto ErrOrArchiveMember = GetArchiveMemberBuffer(Filename))
+    return *ErrOrArchiveMember;
+
+  // If the name ends with a closing paren, there is a huge chance
+  // it is an archive member specification.
+  if (Filename.endswith(")"))
+    if (auto ErrOrArchiveMember = MapArchiveAndGetMemberBuffer(Filename))
+      return *ErrOrArchiveMember;
+
+  // Otherwise, just try opening a standard file. If this is an
+  // archive member specifiaction and any of the above didn't handle it
+  // (either because the archive is not there anymore, or because the
+  // archive doesn't contain the requested member), this will still
+  // provide a sensible error message.
+  auto ErrOrFile = MemoryBuffer::getFileOrSTDIN(Filename);
+  if (auto Err = ErrOrFile.getError())
+    return Err;
+
+  if (Verbose)
+    outs() << "\tloaded file.\n";
+  CurrentArchive.reset();
+  CurrentMemoryBuffer = std::move(ErrOrFile.get());
+  return CurrentMemoryBuffer->getMemBufferRef();
+}
+
+ErrorOr<MemoryBufferRef>
+BinaryHolder::GetArchiveMemberBuffer(StringRef Filename) {
+  if (!CurrentArchive)
+    return make_error_code(errc::no_such_file_or_directory);
+
+  StringRef CurArchiveName = CurrentArchive->getFileName();
+  if (!Filename.startswith(Twine(CurArchiveName, "(").str()))
+    return make_error_code(errc::no_such_file_or_directory);
+
+  // Remove the archive name and the parens around the archive member name.
+  Filename = Filename.substr(CurArchiveName.size() + 1).drop_back();
+
+  for (const auto &Child : CurrentArchive->children()) {
+    if (auto NameOrErr = Child.getName())
+      if (*NameOrErr == Filename) {
+        if (Verbose)
+          outs() << "\tfound member in current archive.\n";
+        return Child.getMemoryBufferRef();
+      }
+  }
+
+  return make_error_code(errc::no_such_file_or_directory);
+}
+
+ErrorOr<MemoryBufferRef>
+BinaryHolder::MapArchiveAndGetMemberBuffer(StringRef Filename) {
+  StringRef ArchiveFilename = Filename.substr(0, Filename.find('('));
+
+  auto ErrOrBuff = MemoryBuffer::getFileOrSTDIN(ArchiveFilename);
+  if (auto Err = ErrOrBuff.getError())
+    return Err;
+
+  if (Verbose)
+    outs() << "\topened new archive '" << ArchiveFilename << "'\n";
+  auto ErrOrArchive = object::Archive::create((*ErrOrBuff)->getMemBufferRef());
+  if (auto Err = ErrOrArchive.getError())
+    return Err;
+
+  CurrentArchive = std::move(*ErrOrArchive);
+  CurrentMemoryBuffer = std::move(*ErrOrBuff);
+
+  return GetArchiveMemberBuffer(Filename);
+}
+
+ErrorOr<const object::ObjectFile &>
+BinaryHolder::GetObjectFile(StringRef Filename) {
+  auto ErrOrMemBufferRef = GetMemoryBufferForFile(Filename);
+  if (auto Err = ErrOrMemBufferRef.getError())
+    return Err;
+
+  auto ErrOrObjectFile =
+      object::ObjectFile::createObjectFile(*ErrOrMemBufferRef);
+  if (auto Err = ErrOrObjectFile.getError())
+    return Err;
+
+  CurrentObjectFile = std::move(*ErrOrObjectFile);
+  return *CurrentObjectFile;
+}
+}
+}
diff --git a/tools/dsymutil/BinaryHolder.h b/tools/dsymutil/BinaryHolder.h
new file mode 100644
index 000000000000..04871b5d5855
--- /dev/null
+++ b/tools/dsymutil/BinaryHolder.h
@@ -0,0 +1,104 @@
+//===-- BinaryHolder.h - Utility class for accessing binaries -------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This program is a utility that aims to be a dropin replacement for
+// Darwin's dsymutil.
+//
+//===----------------------------------------------------------------------===//
+#ifndef LLVM_TOOLS_DSYMUTIL_BINARYHOLDER_H
+#define LLVM_TOOLS_DSYMUTIL_BINARYHOLDER_H
+
+#include "llvm/Object/Archive.h"
+#include "llvm/Object/Error.h"
+#include "llvm/Object/ObjectFile.h"
+#include "llvm/Support/Errc.h"
+#include "llvm/Support/ErrorOr.h"
+
+namespace llvm {
+namespace dsymutil {
+
+/// \brief The BinaryHolder class is responsible for creating and
+/// owning ObjectFile objects and their underlying MemoryBuffer. This
+/// is different from a simple OwningBinary in that it handles
+/// accessing to archive members.
+///
+/// As an optimization, this class will reuse an already mapped and
+/// parsed Archive object if 2 successive requests target the same
+/// archive file (Which is always the case in debug maps).
+/// Currently it only owns one memory buffer at any given time,
+/// meaning that a mapping request will invalidate the previous memory
+/// mapping.
+class BinaryHolder {
+  std::unique_ptr<object::Archive> CurrentArchive;
+  std::unique_ptr<MemoryBuffer> CurrentMemoryBuffer;
+  std::unique_ptr<object::ObjectFile> CurrentObjectFile;
+  bool Verbose;
+
+  /// \brief Get the MemoryBufferRef for the file specification in \p
+  /// Filename from the current archive.
+  ///
+  /// This function performs no system calls, it just looks up a
+  /// potential match for the given \p Filename in the currently
+  /// mapped archive if there is one.
+  ErrorOr<MemoryBufferRef> GetArchiveMemberBuffer(StringRef Filename);
+
+  /// \brief Interpret Filename as an archive member specification,
+  /// map the corresponding archive to memory and return the
+  /// MemoryBufferRef corresponding to the described member.
+  ErrorOr<MemoryBufferRef> MapArchiveAndGetMemberBuffer(StringRef Filename);
+
+  /// \brief Return the MemoryBufferRef that holds the memory
+  /// mapping for the given \p Filename. This function will try to
+  /// parse archive member specifications of the form
+  /// /path/to/archive.a(member.o).
+  ///
+  /// The returned MemoryBufferRef points to a buffer owned by this
+  /// object. The buffer is valid until the next call to
+  /// GetMemoryBufferForFile() on this object.
+  ErrorOr<MemoryBufferRef> GetMemoryBufferForFile(StringRef Filename);
+
+public:
+  BinaryHolder(bool Verbose) : Verbose(Verbose) {}
+
+  /// \brief Get the ObjectFile designated by the \p Filename. This
+  /// might be an archive member specification of the form
+  /// /path/to/archive.a(member.o).
+  ///
+  /// Calling this function invalidates the previous mapping owned by
+  /// the BinaryHolder.
+  ErrorOr<const object::ObjectFile &> GetObjectFile(StringRef Filename);
+
+  /// \brief Wraps GetObjectFile() to return a derived ObjectFile type.
+  template <typename ObjectFileType>
+  ErrorOr<const ObjectFileType &> GetFileAs(StringRef Filename) {
+    auto ErrOrObjFile = GetObjectFile(Filename);
+    if (auto Err = ErrOrObjFile.getError())
+      return Err;
+    if (const auto *Derived = dyn_cast<ObjectFileType>(CurrentObjectFile.get()))
+      return *Derived;
+    return make_error_code(object::object_error::invalid_file_type);
+  }
+
+  /// \brief Access the currently owned ObjectFile. As successfull
+  /// call to GetObjectFile() or GetFileAs() must have been performed
+  /// before calling this.
+  const object::ObjectFile &Get() {
+    assert(CurrentObjectFile);
+    return *CurrentObjectFile;
+  }
+
+  /// \brief Access to a derived version of the currently owned
+  /// ObjectFile. The conversion must be known to be valid.
+  template <typename ObjectFileType> const ObjectFileType &GetAs() {
+    return cast<ObjectFileType>(*CurrentObjectFile);
+  }
+};
+}
+}
+#endif
diff --git a/tools/dsymutil/CMakeLists.txt b/tools/dsymutil/CMakeLists.txt
new file mode 100644
index 000000000000..bfe7c706391a
--- /dev/null
+++ b/tools/dsymutil/CMakeLists.txt
@@ -0,0 +1,13 @@
+set(LLVM_LINK_COMPONENTS
+  Object
+  Support
+  )
+
+add_llvm_tool(llvm-dsymutil
+  dsymutil.cpp
+  BinaryHolder.cpp
+  DebugMap.cpp
+  DwarfLinker.cpp
+  MachODebugMapParser.cpp
+  )
+
diff --git a/tools/dsymutil/DebugMap.cpp b/tools/dsymutil/DebugMap.cpp
new file mode 100644
index 000000000000..7898160ae6b9
--- /dev/null
+++ b/tools/dsymutil/DebugMap.cpp
@@ -0,0 +1,80 @@
+//===- tools/dsymutil/DebugMap.cpp - Generic debug map representation -----===//
+//
+//                             The LLVM Linker
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+#include "DebugMap.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/iterator_range.h"
+#include "llvm/Support/DataTypes.h"
+#include "llvm/Support/Format.h"
+#include "llvm/Support/raw_ostream.h"
+#include <algorithm>
+
+namespace llvm {
+namespace dsymutil {
+
+using namespace llvm::object;
+
+DebugMapObject::DebugMapObject(StringRef ObjectFilename)
+    : Filename(ObjectFilename) {}
+
+bool DebugMapObject::addSymbol(StringRef Name, uint64_t ObjectAddress,
+                               uint64_t LinkedAddress) {
+  auto InsertResult = Symbols.insert(
+      std::make_pair(Name, SymbolMapping(ObjectAddress, LinkedAddress)));
+  return InsertResult.second;
+}
+
+void DebugMapObject::print(raw_ostream &OS) const {
+  OS << getObjectFilename() << ":\n";
+  // Sort the symbols in alphabetical order, like llvm-nm (and to get
+  // deterministic output for testing).
+  typedef std::pair<StringRef, SymbolMapping> Entry;
+  std::vector<Entry> Entries;
+  Entries.reserve(Symbols.getNumItems());
+  for (const auto &Sym : make_range(Symbols.begin(), Symbols.end()))
+    Entries.push_back(std::make_pair(Sym.getKey(), Sym.getValue()));
+  std::sort(
+      Entries.begin(), Entries.end(),
+      [](const Entry &LHS, const Entry &RHS) { return LHS.first < RHS.first; });
+  for (const auto &Sym : Entries) {
+    OS << format("\t%016" PRIx64 " => %016" PRIx64 "\t%s\n",
+                 Sym.second.ObjectAddress, Sym.second.BinaryAddress,
+                 Sym.first.data());
+  }
+  OS << '\n';
+}
+
+#ifndef NDEBUG
+void DebugMapObject::dump() const { print(errs()); }
+#endif
+
+DebugMapObject &DebugMap::addDebugMapObject(StringRef ObjectFilePath) {
+  Objects.emplace_back(new DebugMapObject(ObjectFilePath));
+  return *Objects.back();
+}
+
+const DebugMapObject::SymbolMapping *
+DebugMapObject::lookupSymbol(StringRef SymbolName) const {
+  StringMap<SymbolMapping>::const_iterator Sym = Symbols.find(SymbolName);
+  if (Sym == Symbols.end())
+    return nullptr;
+  return &Sym->getValue();
+}
+
+void DebugMap::print(raw_ostream &OS) const {
+  OS << "DEBUG MAP:   object addr =>  executable addr\tsymbol name\n";
+  for (const auto &Obj : objects())
+    Obj->print(OS);
+  OS << "END DEBUG MAP\n";
+}
+
+#ifndef NDEBUG
+void DebugMap::dump() const { print(errs()); }
+#endif
+}
+}
diff --git a/tools/dsymutil/DebugMap.h b/tools/dsymutil/DebugMap.h
new file mode 100644
index 000000000000..54bff3272080
--- /dev/null
+++ b/tools/dsymutil/DebugMap.h
@@ -0,0 +1,128 @@
+//===- tools/dsymutil/DebugMap.h - Generic debug map representation -------===//
+//
+//                             The LLVM Linker
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+///
+/// This file contains the class declaration of the DebugMap
+/// entity. A DebugMap lists all the object files linked together to
+/// produce an executable along with the linked address of all the
+/// atoms used in these object files.
+/// The DebugMap is an input to the DwarfLinker class that will
+/// extract the Dwarf debug information from the referenced object
+/// files and link their usefull debug info together.
+///
+//===----------------------------------------------------------------------===//
+#ifndef LLVM_TOOLS_DSYMUTIL_DEBUGMAP_H
+#define LLVM_TOOLS_DSYMUTIL_DEBUGMAP_H
+
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/iterator_range.h"
+#include "llvm/Object/ObjectFile.h"
+#include "llvm/Support/ErrorOr.h"
+#include "llvm/Support/Format.h"
+#include <vector>
+
+namespace llvm {
+class raw_ostream;
+
+namespace dsymutil {
+class DebugMapObject;
+
+/// \brief The DebugMap object stores the list of object files to
+/// query for debug information along with the mapping between the
+/// symbols' addresses in the object file to their linked address in
+/// the linked binary.
+///
+/// A DebugMap producer could look like this:
+/// DebugMap *DM = new DebugMap();
+/// for (const auto &Obj: LinkedObjects) {
+///     DebugMapObject &DMO = DM->addDebugMapObject(Obj.getPath());
+///     for (const auto &Sym: Obj.getLinkedSymbols())
+///         DMO.addSymbol(Sym.getName(), Sym.getObjectFileAddress(),
+///                       Sym.getBinaryAddress());
+/// }
+///
+/// A DebugMap consumer can then use the map to link the debug
+/// information. For example something along the lines of:
+/// for (const auto &DMO: DM->objects()) {
+///     auto Obj = createBinary(DMO.getObjectFilename());
+///     for (auto &DIE: Obj.getDwarfDIEs()) {
+///         if (SymbolMapping *Sym = DMO.lookup(DIE.getName()))
+///             DIE.relocate(Sym->ObjectAddress, Sym->BinaryAddress);
+///         else
+///             DIE.discardSubtree();
+///     }
+/// }
+class DebugMap {
+  typedef std::vector<std::unique_ptr<DebugMapObject>> ObjectContainer;
+  ObjectContainer Objects;
+
+public:
+  typedef ObjectContainer::const_iterator const_iterator;
+
+  iterator_range<const_iterator> objects() const {
+    return make_range(begin(), end());
+  }
+
+  const_iterator begin() const { return Objects.begin(); }
+
+  const_iterator end() const { return Objects.end(); }
+
+  /// This function adds an DebugMapObject to the list owned by this
+  /// debug map.
+  DebugMapObject &addDebugMapObject(StringRef ObjectFilePath);
+
+  void print(raw_ostream &OS) const;
+
+#ifndef NDEBUG
+  void dump() const;
+#endif
+};
+
+/// \brief The DebugMapObject represents one object file described by
+/// the DebugMap. It contains a list of mappings between addresses in
+/// the object file and in the linked binary for all the linked atoms
+/// in this object file.
+class DebugMapObject {
+public:
+  struct SymbolMapping {
+    uint64_t ObjectAddress;
+    uint64_t BinaryAddress;
+    SymbolMapping(uint64_t ObjectAddress, uint64_t BinaryAddress)
+        : ObjectAddress(ObjectAddress), BinaryAddress(BinaryAddress) {}
+  };
+
+  /// \brief Adds a symbol mapping to this DebugMapObject.
+  /// \returns false if the symbol was already registered. The request
+  /// is discarded in this case.
+  bool addSymbol(llvm::StringRef SymName, uint64_t ObjectAddress,
+                 uint64_t LinkedAddress);
+
+  /// \brief Lookup a symbol mapping.
+  /// \returns null if the symbol isn't found.
+  const SymbolMapping *lookupSymbol(StringRef SymbolName) const;
+
+  llvm::StringRef getObjectFilename() const { return Filename; }
+
+  void print(raw_ostream &OS) const;
+#ifndef NDEBUG
+  void dump() const;
+#endif
+private:
+  friend class DebugMap;
+  /// DebugMapObjects can only be constructed by the owning DebugMap.
+  DebugMapObject(StringRef ObjectFilename);
+
+  std::string Filename;
+  StringMap<SymbolMapping> Symbols;
+};
+}
+}
+
+#endif // LLVM_TOOLS_DSYMUTIL_DEBUGMAP_H
diff --git a/tools/dsymutil/DwarfLinker.cpp b/tools/dsymutil/DwarfLinker.cpp
new file mode 100644
index 000000000000..ad471055bd9c
--- /dev/null
+++ b/tools/dsymutil/DwarfLinker.cpp
@@ -0,0 +1,20 @@
+//===- tools/dsymutil/DwarfLinker.cpp - Dwarf debug info linker -----------===//
+//
+//                             The LLVM Linker
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+#include "DebugMap.h"
+#include "dsymutil.h"
+
+namespace llvm {
+namespace dsymutil {
+
+bool linkDwarf(StringRef OutputFilename, const DebugMap &DM, bool Verbose) {
+  // Do nothing for now.
+  return true;
+}
+}
+}
diff --git a/tools/dsymutil/LLVMBuild.txt b/tools/dsymutil/LLVMBuild.txt
new file mode 100644
index 000000000000..24b9033c78c6
--- /dev/null
+++ b/tools/dsymutil/LLVMBuild.txt
@@ -0,0 +1,22 @@
+;===- ./tools/dsymutil/LLVMBuild.txt ---------------------*- Conf -*--===;
+;
+;                     The LLVM Compiler Infrastructure
+;
+; This file is distributed under the University of Illinois Open Source
+; License. See LICENSE.TXT for details.
+;
+;===------------------------------------------------------------------------===;
+;
+; This is an LLVMBuild description file for the components in this subdirectory.
+;
+; For more information on the LLVMBuild system, please see:
+;
+;   http://llvm.org/docs/LLVMBuild.html
+;
+;===------------------------------------------------------------------------===;
+
+[component_0]
+type = Tool
+name = llvm-dsymutil
+parent = Tools
+required_libraries = Object Support
diff --git a/tools/dsymutil/MachODebugMapParser.cpp b/tools/dsymutil/MachODebugMapParser.cpp
new file mode 100644
index 000000000000..6b244fc369e9
--- /dev/null
+++ b/tools/dsymutil/MachODebugMapParser.cpp
@@ -0,0 +1,234 @@
+//===- tools/dsymutil/MachODebugMapParser.cpp - Parse STABS debug maps ----===//
+//
+//                             The LLVM Linker
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "BinaryHolder.h"
+#include "DebugMap.h"
+#include "dsymutil.h"
+#include "llvm/Object/MachO.h"
+#include "llvm/Support/Path.h"
+#include "llvm/Support/raw_ostream.h"
+
+namespace {
+using namespace llvm;
+using namespace llvm::dsymutil;
+using namespace llvm::object;
+
+class MachODebugMapParser {
+public:
+  MachODebugMapParser(StringRef BinaryPath, StringRef PathPrefix = "",
+                      bool Verbose = false)
+      : BinaryPath(BinaryPath), PathPrefix(PathPrefix),
+        MainBinaryHolder(Verbose), CurrentObjectHolder(Verbose),
+        CurrentDebugMapObject(nullptr) {}
+
+  /// \brief Parses and returns the DebugMap of the input binary.
+  /// \returns an error in case the provided BinaryPath doesn't exist
+  /// or isn't of a supported type.
+  ErrorOr<std::unique_ptr<DebugMap>> parse();
+
+private:
+  std::string BinaryPath;
+  std::string PathPrefix;
+
+  /// Owns the MemoryBuffer for the main binary.
+  BinaryHolder MainBinaryHolder;
+  /// Map of the binary symbol addresses.
+  StringMap<uint64_t> MainBinarySymbolAddresses;
+  StringRef MainBinaryStrings;
+  /// The constructed DebugMap.
+  std::unique_ptr<DebugMap> Result;
+
+  /// Owns the MemoryBuffer for the currently handled object file.
+  BinaryHolder CurrentObjectHolder;
+  /// Map of the currently processed object file symbol addresses.
+  StringMap<uint64_t> CurrentObjectAddresses;
+  /// Element of the debug map corresponfing to the current object file.
+  DebugMapObject *CurrentDebugMapObject;
+
+  void switchToNewDebugMapObject(StringRef Filename);
+  void resetParserState();
+  uint64_t getMainBinarySymbolAddress(StringRef Name);
+  void loadMainBinarySymbols();
+  void loadCurrentObjectFileSymbols();
+  void handleStabSymbolTableEntry(uint32_t StringIndex, uint8_t Type,
+                                  uint8_t SectionIndex, uint16_t Flags,
+                                  uint64_t Value);
+
+  template <typename STEType> void handleStabDebugMapEntry(const STEType &STE) {
+    handleStabSymbolTableEntry(STE.n_strx, STE.n_type, STE.n_sect, STE.n_desc,
+                               STE.n_value);
+  }
+};
+
+static void Warning(const Twine &Msg) { errs() << "warning: " + Msg + "\n"; }
+}
+
+/// Reset the parser state coresponding to the current object
+/// file. This is to be called after an object file is finished
+/// processing.
+void MachODebugMapParser::resetParserState() {
+  CurrentObjectAddresses.clear();
+  CurrentDebugMapObject = nullptr;
+}
+
+/// Create a new DebugMapObject. This function resets the state of the
+/// parser that was referring to the last object file and sets
+/// everything up to add symbols to the new one.
+void MachODebugMapParser::switchToNewDebugMapObject(StringRef Filename) {
+  resetParserState();
+
+  SmallString<80> Path(PathPrefix);
+  sys::path::append(Path, Filename);
+
+  auto MachOOrError = CurrentObjectHolder.GetFileAs<MachOObjectFile>(Path);
+  if (auto Error = MachOOrError.getError()) {
+    Warning(Twine("cannot open debug object \"") + Path.str() + "\": " +
+            Error.message() + "\n");
+    return;
+  }
+
+  loadCurrentObjectFileSymbols();
+  CurrentDebugMapObject = &Result->addDebugMapObject(Path);
+}
+
+/// This main parsing routine tries to open the main binary and if
+/// successful iterates over the STAB entries. The real parsing is
+/// done in handleStabSymbolTableEntry.
+ErrorOr<std::unique_ptr<DebugMap>> MachODebugMapParser::parse() {
+  auto MainBinOrError = MainBinaryHolder.GetFileAs<MachOObjectFile>(BinaryPath);
+  if (auto Error = MainBinOrError.getError())
+    return Error;
+
+  const MachOObjectFile &MainBinary = *MainBinOrError;
+  loadMainBinarySymbols();
+  Result = make_unique<DebugMap>();
+  MainBinaryStrings = MainBinary.getStringTableData();
+  for (const SymbolRef &Symbol : MainBinary.symbols()) {
+    const DataRefImpl &DRI = Symbol.getRawDataRefImpl();
+    if (MainBinary.is64Bit())
+      handleStabDebugMapEntry(MainBinary.getSymbol64TableEntry(DRI));
+    else
+      handleStabDebugMapEntry(MainBinary.getSymbolTableEntry(DRI));
+  }
+
+  resetParserState();
+  return std::move(Result);
+}
+
+/// Interpret the STAB entries to fill the DebugMap.
+void MachODebugMapParser::handleStabSymbolTableEntry(uint32_t StringIndex,
+                                                     uint8_t Type,
+                                                     uint8_t SectionIndex,
+                                                     uint16_t Flags,
+                                                     uint64_t Value) {
+  if (!(Type & MachO::N_STAB))
+    return;
+
+  const char *Name = &MainBinaryStrings.data()[StringIndex];
+
+  // An N_OSO entry represents the start of a new object file description.
+  if (Type == MachO::N_OSO)
+    return switchToNewDebugMapObject(Name);
+
+  // If the last N_OSO object file wasn't found,
+  // CurrentDebugMapObject will be null. Do not update anything
+  // until we find the next valid N_OSO entry.
+  if (!CurrentDebugMapObject)
+    return;
+
+  switch (Type) {
+  case MachO::N_GSYM:
+    // This is a global variable. We need to query the main binary
+    // symbol table to find its address as it might not be in the
+    // debug map (for common symbols).
+    Value = getMainBinarySymbolAddress(Name);
+    if (Value == UnknownAddressOrSize)
+      return;
+    break;
+  case MachO::N_FUN:
+    // Functions are scopes in STABS. They have an end marker that we
+    // need to ignore.
+    if (Name[0] == '\0')
+      return;
+    break;
+  case MachO::N_STSYM:
+    break;
+  default:
+    return;
+  }
+
+  auto ObjectSymIt = CurrentObjectAddresses.find(Name);
+  if (ObjectSymIt == CurrentObjectAddresses.end())
+    return Warning("could not find object file symbol for symbol " +
+                   Twine(Name));
+  if (!CurrentDebugMapObject->addSymbol(Name, ObjectSymIt->getValue(), Value))
+    return Warning(Twine("failed to insert symbol '") + Name +
+                   "' in the debug map.");
+}
+
+/// Load the current object file symbols into CurrentObjectAddresses.
+void MachODebugMapParser::loadCurrentObjectFileSymbols() {
+  CurrentObjectAddresses.clear();
+
+  for (auto Sym : CurrentObjectHolder.Get().symbols()) {
+    StringRef Name;
+    uint64_t Addr;
+    if (Sym.getAddress(Addr) || Addr == UnknownAddressOrSize ||
+        Sym.getName(Name))
+      continue;
+    CurrentObjectAddresses[Name] = Addr;
+  }
+}
+
+/// Lookup a symbol address in the main binary symbol table. The
+/// parser only needs to query common symbols, thus not every symbol's
+/// address is available through this function.
+uint64_t MachODebugMapParser::getMainBinarySymbolAddress(StringRef Name) {
+  auto Sym = MainBinarySymbolAddresses.find(Name);
+  if (Sym == MainBinarySymbolAddresses.end())
+    return UnknownAddressOrSize;
+  return Sym->second;
+}
+
+/// Load the interesting main binary symbols' addresses into
+/// MainBinarySymbolAddresses.
+void MachODebugMapParser::loadMainBinarySymbols() {
+  const MachOObjectFile &MainBinary = MainBinaryHolder.GetAs<MachOObjectFile>();
+  section_iterator Section = MainBinary.section_end();
+  for (const auto &Sym : MainBinary.symbols()) {
+    SymbolRef::Type Type;
+    // Skip undefined and STAB entries.
+    if (Sym.getType(Type) || (Type & SymbolRef::ST_Debug) ||
+        (Type & SymbolRef::ST_Unknown))
+      continue;
+    StringRef Name;
+    uint64_t Addr;
+    // The only symbols of interest are the global variables. These
+    // are the only ones that need to be queried because the address
+    // of common data won't be described in the debug map. All other
+    // addresses should be fetched for the debug map.
+    if (Sym.getAddress(Addr) || Addr == UnknownAddressOrSize ||
+        !(Sym.getFlags() & SymbolRef::SF_Global) || Sym.getSection(Section) ||
+        Section->isText() || Sym.getName(Name) || Name.size() == 0 ||
+        Name[0] == '\0')
+      continue;
+    MainBinarySymbolAddresses[Name] = Addr;
+  }
+}
+
+namespace llvm {
+namespace dsymutil {
+llvm::ErrorOr<std::unique_ptr<DebugMap>> parseDebugMap(StringRef InputFile,
+                                                       StringRef PrependPath,
+                                                       bool Verbose) {
+  MachODebugMapParser Parser(InputFile, PrependPath, Verbose);
+  return Parser.parse();
+}
+}
+}
diff --git a/tools/dsymutil/Makefile b/tools/dsymutil/Makefile
new file mode 100644
index 000000000000..9eda7dcabc0a
--- /dev/null
+++ b/tools/dsymutil/Makefile
@@ -0,0 +1,17 @@
+##===- tools/dsymutil/Makefile -----------------------------*- Makefile -*-===##
+#
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+##===----------------------------------------------------------------------===##
+
+LEVEL := ../..
+TOOLNAME := llvm-dsymutil
+LINK_COMPONENTS := Object Support
+
+# This tool has no plugins, optimize startup time.
+TOOL_NO_EXPORTS := 1
+
+include $(LEVEL)/Makefile.common
diff --git a/tools/dsymutil/dsymutil.cpp b/tools/dsymutil/dsymutil.cpp
new file mode 100644
index 000000000000..2b4fcfe07008
--- /dev/null
+++ b/tools/dsymutil/dsymutil.cpp
@@ -0,0 +1,71 @@
+//===-- dsymutil.cpp - Debug info dumping utility for llvm ----------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This program is a utility that aims to be a dropin replacement for
+// Darwin's dsymutil.
+//
+//===----------------------------------------------------------------------===//
+
+#include "DebugMap.h"
+#include "dsymutil.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/Options.h"
+#include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/Signals.h"
+#include "llvm/Support/raw_ostream.h"
+#include <string>
+
+using namespace llvm::dsymutil;
+
+namespace {
+using namespace llvm::cl;
+
+static opt<std::string> InputFile(Positional, desc("<input file>"),
+                                  init("a.out"));
+
+static opt<std::string> OsoPrependPath("oso-prepend-path",
+                                       desc("Specify a directory to prepend "
+                                            "to the paths of object files."),
+                                       value_desc("path"));
+
+static opt<bool> Verbose("v", desc("Verbosity level"), init(false));
+
+static opt<bool>
+    ParseOnly("parse-only",
+              desc("Only parse the debug map, do not actaully link "
+                   "the DWARF."),
+              init(false));
+}
+
+int main(int argc, char **argv) {
+  llvm::sys::PrintStackTraceOnErrorSignal();
+  llvm::PrettyStackTraceProgram StackPrinter(argc, argv);
+  llvm::llvm_shutdown_obj Shutdown;
+
+  llvm::cl::ParseCommandLineOptions(argc, argv, "llvm dsymutil\n");
+  auto DebugMapPtrOrErr = parseDebugMap(InputFile, OsoPrependPath, Verbose);
+
+  if (auto EC = DebugMapPtrOrErr.getError()) {
+    llvm::errs() << "error: cannot parse the debug map for \"" << InputFile
+                 << "\": " << EC.message() << '\n';
+    return 1;
+  }
+
+  if (Verbose)
+    (*DebugMapPtrOrErr)->print(llvm::outs());
+
+  if (ParseOnly)
+    return 0;
+
+  std::string OutputBasename(InputFile);
+  if (OutputBasename == "-")
+    OutputBasename = "a.out";
+
+  return !linkDwarf(OutputBasename + ".dwarf", **DebugMapPtrOrErr, Verbose);
+}
diff --git a/tools/dsymutil/dsymutil.h b/tools/dsymutil/dsymutil.h
new file mode 100644
index 000000000000..9203beaf6774
--- /dev/null
+++ b/tools/dsymutil/dsymutil.h
@@ -0,0 +1,39 @@
+//===- tools/dsymutil/dsymutil.h - dsymutil high-level functionality ------===//
+//
+//                             The LLVM Linker
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+///
+/// This file contains the class declaration for the code that parses STABS
+/// debug maps that are embedded in the binaries symbol tables.
+///
+//===----------------------------------------------------------------------===//
+#ifndef LLVM_TOOLS_DSYMUTIL_DSYMUTIL_H
+#define LLVM_TOOLS_DSYMUTIL_DSYMUTIL_H
+
+#include "DebugMap.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Support/ErrorOr.h"
+#include <memory>
+
+namespace llvm {
+namespace dsymutil {
+/// \brief Extract the DebugMap from the given file.
+/// The file has to be a MachO object file.
+llvm::ErrorOr<std::unique_ptr<DebugMap>>
+parseDebugMap(StringRef InputFile, StringRef PrependPath = "",
+              bool Verbose = false);
+
+/// \brief Link the Dwarf debuginfo as directed by the passed DebugMap
+/// \p DM into a DwarfFile named \p OutputFilename.
+/// \returns false if the link failed.
+bool linkDwarf(StringRef OutputFilename, const DebugMap &DM,
+               bool Verbose = false);
+}
+}
+#endif // LLVM_TOOLS_DSYMUTIL_DSYMUTIL_H
diff --git a/tools/gold/CMakeLists.txt b/tools/gold/CMakeLists.txt
index 3864e154548c..a70905c84bf0 100644
--- a/tools/gold/CMakeLists.txt
+++ b/tools/gold/CMakeLists.txt
@@ -3,11 +3,7 @@ set(LLVM_BINUTILS_INCDIR "" CACHE PATH
 
 set(LLVM_EXPORTED_SYMBOL_FILE ${CMAKE_CURRENT_SOURCE_DIR}/gold.exports)
 
-if( NOT LLVM_BINUTILS_INCDIR )
-  # Nothing to say.
-elseif( NOT EXISTS "${LLVM_BINUTILS_INCDIR}/plugin-api.h" )
-  message(STATUS "plugin-api.h not found. gold plugin excluded from the build.")
-else()
+if( LLVM_ENABLE_PIC AND LLVM_BINUTILS_INCDIR )
   include_directories( ${LLVM_BINUTILS_INCDIR} )
 
   # Because off_t is used in the public API, the largefile parts are required for
@@ -16,7 +12,9 @@ else()
 
   set(LLVM_LINK_COMPONENTS
      ${LLVM_TARGETS_TO_BUILD}
-     LTO
+     Linker
+     BitWriter
+     IPO
      )
 
   add_llvm_loadable_module(LLVMgold
diff --git a/tools/gold/Makefile b/tools/gold/Makefile
index 593d8eab2932..aa006b0048fc 100644
--- a/tools/gold/Makefile
+++ b/tools/gold/Makefile
@@ -20,7 +20,7 @@ EXPORTED_SYMBOL_FILE = $(PROJ_SRC_DIR)/gold.exports
 # early so we can set up LINK_COMPONENTS before including Makefile.rules
 include $(LEVEL)/Makefile.config
 
-LINK_COMPONENTS := $(TARGETS_TO_BUILD) LTO
+LINK_COMPONENTS := $(TARGETS_TO_BUILD) Linker BitWriter IPO
 
 # Because off_t is used in the public API, the largefile parts are required for
 # ABI compatibility.
diff --git a/tools/gold/gold-plugin.cpp b/tools/gold/gold-plugin.cpp
index b90851019fea..bcc91e9d0612 100644
--- a/tools/gold/gold-plugin.cpp
+++ b/tools/gold/gold-plugin.cpp
@@ -13,33 +13,38 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Config/config.h" // plugin-api.h requires HAVE_STDINT_H
-#include "llvm-c/lto.h"
+#include "llvm/ADT/DenseSet.h"
 #include "llvm/ADT/StringSet.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/CodeGen/Analysis.h"
 #include "llvm/CodeGen/CommandFlags.h"
-#include "llvm/LTO/LTOCodeGenerator.h"
-#include "llvm/LTO/LTOModule.h"
-#include "llvm/Support/Errno.h"
-#include "llvm/Support/FileSystem.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/DiagnosticInfo.h"
+#include "llvm/IR/DiagnosticPrinter.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IR/Verifier.h"
+#include "llvm/Linker/Linker.h"
+#include "llvm/MC/SubtargetFeature.h"
+#include "llvm/Object/IRObjectFile.h"
+#include "llvm/PassManager.h"
+#include "llvm/Support/FormattedStream.h"
+#include "llvm/Support/Host.h"
+#include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/MemoryBuffer.h"
-#include "llvm/Support/Path.h"
-#include "llvm/Support/Program.h"
+#include "llvm/Support/TargetRegistry.h"
 #include "llvm/Support/TargetSelect.h"
-#include "llvm/Support/ToolOutputFile.h"
-#include <cerrno>
-#include <cstdlib>
-#include <cstring>
+#include "llvm/Target/TargetLibraryInfo.h"
+#include "llvm/Transforms/IPO.h"
+#include "llvm/Transforms/IPO/PassManagerBuilder.h"
+#include "llvm/Transforms/Utils/GlobalStatus.h"
+#include "llvm/Transforms/Utils/ModuleUtils.h"
+#include "llvm/Transforms/Utils/ValueMapper.h"
 #include <list>
 #include <plugin-api.h>
 #include <system_error>
 #include <vector>
 
-// Support Windows/MinGW crazyness.
-#ifdef _WIN32
-# include <io.h>
-# define lseek _lseek
-# define read _read
-#endif
-
 #ifndef LDPO_PIE
 // FIXME: remove this declaration when we stop maintaining Ubuntu Quantal and
 // Precise and Debian Wheezy (binutils 2.23 is required)
@@ -61,25 +66,29 @@ static ld_plugin_status discard_message(int level, const char *format, ...) {
   abort();
 }
 
-static ld_plugin_add_symbols add_symbols = NULL;
-static ld_plugin_get_symbols get_symbols = NULL;
-static ld_plugin_add_input_file add_input_file = NULL;
-static ld_plugin_set_extra_library_path set_extra_library_path = NULL;
-static ld_plugin_get_view get_view = NULL;
+static ld_plugin_get_input_file get_input_file = nullptr;
+static ld_plugin_release_input_file release_input_file = nullptr;
+static ld_plugin_add_symbols add_symbols = nullptr;
+static ld_plugin_get_symbols get_symbols = nullptr;
+static ld_plugin_add_input_file add_input_file = nullptr;
+static ld_plugin_set_extra_library_path set_extra_library_path = nullptr;
+static ld_plugin_get_view get_view = nullptr;
 static ld_plugin_message message = discard_message;
-static lto_codegen_model output_type = LTO_CODEGEN_PIC_MODEL_STATIC;
+static Reloc::Model RelocationModel = Reloc::Default;
 static std::string output_name = "";
 static std::list<claimed_file> Modules;
 static std::vector<std::string> Cleanup;
-static LTOCodeGenerator *CodeGen = nullptr;
-static StringSet<> CannotBeHidden;
 static llvm::TargetOptions TargetOpts;
 
 namespace options {
-  enum generate_bc { BC_NO, BC_ALSO, BC_ONLY };
+  enum OutputType {
+    OT_NORMAL,
+    OT_DISABLE,
+    OT_BC_ONLY,
+    OT_SAVE_TEMPS
+  };
   static bool generate_api_file = false;
-  static generate_bc generate_bc_file = BC_NO;
-  static std::string bc_path;
+  static OutputType TheOutputType = OT_NORMAL;
   static std::string obj_path;
   static std::string extra_library_path;
   static std::string triple;
@@ -89,11 +98,11 @@ namespace options {
   // as plugin exclusive to pass to the code generator.
   // For example, "generate-api-file" and "as"options are for the plugin
   // use only and will not be passed.
-  static std::vector<std::string> extra;
+  static std::vector<const char *> extra;
 
   static void process_plugin_option(const char* opt_)
   {
-    if (opt_ == NULL)
+    if (opt_ == nullptr)
       return;
     llvm::StringRef opt = opt_;
 
@@ -108,21 +117,19 @@ namespace options {
     } else if (opt.startswith("obj-path=")) {
       obj_path = opt.substr(strlen("obj-path="));
     } else if (opt == "emit-llvm") {
-      generate_bc_file = BC_ONLY;
-    } else if (opt == "also-emit-llvm") {
-      generate_bc_file = BC_ALSO;
-    } else if (opt.startswith("also-emit-llvm=")) {
-      llvm::StringRef path = opt.substr(strlen("also-emit-llvm="));
-      generate_bc_file = BC_ALSO;
-      if (!bc_path.empty()) {
-        (*message)(LDPL_WARNING, "Path to the output IL file specified twice. "
-                   "Discarding %s", opt_);
-      } else {
-        bc_path = path;
-      }
+      TheOutputType = OT_BC_ONLY;
+    } else if (opt == "save-temps") {
+      TheOutputType = OT_SAVE_TEMPS;
+    } else if (opt == "disable-output") {
+      TheOutputType = OT_DISABLE;
     } else {
       // Save this option to pass to the code generator.
-      extra.push_back(opt);
+      // ParseCommandLineOptions() expects argv[0] to be program name. Lazily
+      // add that.
+      if (extra.empty())
+        extra.push_back("LLVMgold");
+
+      extra.push_back(opt_);
     }
   }
 }
@@ -159,14 +166,13 @@ ld_plugin_status onload(ld_plugin_tv *tv) {
           case LDPO_REL:  // .o
           case LDPO_DYN:  // .so
           case LDPO_PIE:  // position independent executable
-            output_type = LTO_CODEGEN_PIC_MODEL_DYNAMIC;
+            RelocationModel = Reloc::PIC_;
             break;
           case LDPO_EXEC:  // .exe
-            output_type = LTO_CODEGEN_PIC_MODEL_STATIC;
+            RelocationModel = Reloc::Static;
             break;
           default:
-            (*message)(LDPL_ERROR, "Unknown output file type %d",
-                       tv->tv_u.tv_val);
+            message(LDPL_ERROR, "Unknown output file type %d", tv->tv_u.tv_val);
             return LDPS_ERR;
         }
         break;
@@ -177,7 +183,7 @@ ld_plugin_status onload(ld_plugin_tv *tv) {
         ld_plugin_register_claim_file callback;
         callback = tv->tv_u.tv_register_claim_file;
 
-        if ((*callback)(claim_file_hook) != LDPS_OK)
+        if (callback(claim_file_hook) != LDPS_OK)
           return LDPS_ERR;
 
         registeredClaimFile = true;
@@ -186,7 +192,7 @@ ld_plugin_status onload(ld_plugin_tv *tv) {
         ld_plugin_register_all_symbols_read callback;
         callback = tv->tv_u.tv_register_all_symbols_read;
 
-        if ((*callback)(all_symbols_read_hook) != LDPS_OK)
+        if (callback(all_symbols_read_hook) != LDPS_OK)
           return LDPS_ERR;
 
         RegisteredAllSymbolsRead = true;
@@ -195,9 +201,15 @@ ld_plugin_status onload(ld_plugin_tv *tv) {
         ld_plugin_register_cleanup callback;
         callback = tv->tv_u.tv_register_cleanup;
 
-        if ((*callback)(cleanup_hook) != LDPS_OK)
+        if (callback(cleanup_hook) != LDPS_OK)
           return LDPS_ERR;
       } break;
+      case LDPT_GET_INPUT_FILE:
+        get_input_file = tv->tv_u.tv_get_input_file;
+        break;
+      case LDPT_RELEASE_INPUT_FILE:
+        release_input_file = tv->tv_u.tv_release_input_file;
+        break;
       case LDPT_ADD_SYMBOLS:
         add_symbols = tv->tv_u.tv_add_symbols;
         break;
@@ -222,56 +234,75 @@ ld_plugin_status onload(ld_plugin_tv *tv) {
   }
 
   if (!registeredClaimFile) {
-    (*message)(LDPL_ERROR, "register_claim_file not passed to LLVMgold.");
+    message(LDPL_ERROR, "register_claim_file not passed to LLVMgold.");
     return LDPS_ERR;
   }
   if (!add_symbols) {
-    (*message)(LDPL_ERROR, "add_symbols not passed to LLVMgold.");
+    message(LDPL_ERROR, "add_symbols not passed to LLVMgold.");
     return LDPS_ERR;
   }
 
   if (!RegisteredAllSymbolsRead)
     return LDPS_OK;
 
-  CodeGen = new LTOCodeGenerator();
-
-  // Pass through extra options to the code generator.
-  if (!options::extra.empty()) {
-    for (std::vector<std::string>::iterator it = options::extra.begin();
-         it != options::extra.end(); ++it) {
-      CodeGen->setCodeGenDebugOptions((*it).c_str());
-    }
+  if (!get_input_file) {
+    message(LDPL_ERROR, "get_input_file not passed to LLVMgold.");
+    return LDPS_ERR;
   }
-
-  CodeGen->parseCodeGenDebugOptions();
-  if (MAttrs.size()) {
-    std::string Attrs;
-    for (unsigned I = 0; I < MAttrs.size(); ++I) {
-      if (I > 0)
-        Attrs.append(",");
-      Attrs.append(MAttrs[I]);
-    }
-    CodeGen->setAttr(Attrs.c_str());
+  if (!release_input_file) {
+    message(LDPL_ERROR, "relesase_input_file not passed to LLVMgold.");
+    return LDPS_ERR;
   }
 
-  TargetOpts = InitTargetOptionsFromCodeGenFlags();
-  CodeGen->setTargetOptions(TargetOpts);
-
   return LDPS_OK;
 }
 
+static const GlobalObject *getBaseObject(const GlobalValue &GV) {
+  if (auto *GA = dyn_cast<GlobalAlias>(&GV))
+    return GA->getBaseObject();
+  return cast<GlobalObject>(&GV);
+}
+
+static bool shouldSkip(uint32_t Symflags) {
+  if (!(Symflags & object::BasicSymbolRef::SF_Global))
+    return true;
+  if (Symflags & object::BasicSymbolRef::SF_FormatSpecific)
+    return true;
+  return false;
+}
+
+static void diagnosticHandler(const DiagnosticInfo &DI, void *Context) {
+  assert(DI.getSeverity() == DS_Error && "Only expecting errors");
+  const auto &BDI = cast<BitcodeDiagnosticInfo>(DI);
+  std::error_code EC = BDI.getError();
+  if (EC == BitcodeError::InvalidBitcodeSignature)
+    return;
+
+  std::string ErrStorage;
+  {
+    raw_string_ostream OS(ErrStorage);
+    DiagnosticPrinterRawOStream DP(OS);
+    DI.print(DP);
+  }
+  message(LDPL_FATAL, "LLVM gold plugin has failed to create LTO module: %s",
+          ErrStorage.c_str());
+}
+
 /// Called by gold to see whether this file is one that our plugin can handle.
 /// We'll try to open it and register all the symbols with add_symbol if
 /// possible.
 static ld_plugin_status claim_file_hook(const ld_plugin_input_file *file,
                                         int *claimed) {
-  const void *view;
-  std::unique_ptr<MemoryBuffer> buffer;
+  LLVMContext Context;
+  MemoryBufferRef BufferRef;
+  std::unique_ptr<MemoryBuffer> Buffer;
   if (get_view) {
+    const void *view;
     if (get_view(file->handle, &view) != LDPS_OK) {
-      (*message)(LDPL_ERROR, "Failed to get a view of %s", file->name);
+      message(LDPL_ERROR, "Failed to get a view of %s", file->name);
       return LDPS_ERR;
     }
+    BufferRef = MemoryBufferRef(StringRef((const char *)view, file->filesize), "");
   } else {
     int64_t offset = 0;
     // Gold has found what might be IR part-way inside of a file, such as
@@ -283,225 +314,566 @@ static ld_plugin_status claim_file_hook(const ld_plugin_input_file *file,
         MemoryBuffer::getOpenFileSlice(file->fd, file->name, file->filesize,
                                        offset);
     if (std::error_code EC = BufferOrErr.getError()) {
-      (*message)(LDPL_ERROR, EC.message().c_str());
+      message(LDPL_ERROR, EC.message().c_str());
       return LDPS_ERR;
     }
-    buffer = std::move(BufferOrErr.get());
-    view = buffer->getBufferStart();
+    Buffer = std::move(BufferOrErr.get());
+    BufferRef = Buffer->getMemBufferRef();
   }
 
-  if (!LTOModule::isBitcodeFile(view, file->filesize))
+  Context.setDiagnosticHandler(diagnosticHandler);
+  ErrorOr<std::unique_ptr<object::IRObjectFile>> ObjOrErr =
+      object::IRObjectFile::create(BufferRef, Context);
+  std::error_code EC = ObjOrErr.getError();
+  if (EC == object::object_error::invalid_file_type ||
+      EC == object::object_error::bitcode_section_not_found)
     return LDPS_OK;
 
-  std::string Error;
-  LTOModule *M =
-      LTOModule::createFromBuffer(view, file->filesize, TargetOpts, Error);
-  if (!M) {
-    (*message)(LDPL_ERROR,
-               "LLVM gold plugin has failed to create LTO module: %s",
-               Error.c_str());
-    return LDPS_OK;
+  *claimed = 1;
+
+  if (EC) {
+    message(LDPL_ERROR, "LLVM gold plugin has failed to create LTO module: %s",
+            EC.message().c_str());
+    return LDPS_ERR;
   }
+  std::unique_ptr<object::IRObjectFile> Obj = std::move(*ObjOrErr);
 
-  *claimed = 1;
   Modules.resize(Modules.size() + 1);
   claimed_file &cf = Modules.back();
 
-  if (!options::triple.empty())
-    M->setTargetTriple(options::triple.c_str());
-
   cf.handle = file->handle;
-  unsigned sym_count = M->getSymbolCount();
-  cf.syms.reserve(sym_count);
 
-  for (unsigned i = 0; i != sym_count; ++i) {
-    lto_symbol_attributes attrs = M->getSymbolAttributes(i);
-    if ((attrs & LTO_SYMBOL_SCOPE_MASK) == LTO_SYMBOL_SCOPE_INTERNAL)
+  for (auto &Sym : Obj->symbols()) {
+    uint32_t Symflags = Sym.getFlags();
+    if (shouldSkip(Symflags))
       continue;
 
     cf.syms.push_back(ld_plugin_symbol());
     ld_plugin_symbol &sym = cf.syms.back();
-    sym.name = strdup(M->getSymbolName(i));
-    sym.version = NULL;
-
-    int scope = attrs & LTO_SYMBOL_SCOPE_MASK;
-    bool CanBeHidden = scope == LTO_SYMBOL_SCOPE_DEFAULT_CAN_BE_HIDDEN;
-    if (!CanBeHidden)
-      CannotBeHidden.insert(sym.name);
-    switch (scope) {
-      case LTO_SYMBOL_SCOPE_HIDDEN:
+    sym.version = nullptr;
+
+    SmallString<64> Name;
+    {
+      raw_svector_ostream OS(Name);
+      Sym.printName(OS);
+    }
+    sym.name = strdup(Name.c_str());
+
+    const GlobalValue *GV = Obj->getSymbolGV(Sym.getRawDataRefImpl());
+
+    sym.visibility = LDPV_DEFAULT;
+    if (GV) {
+      switch (GV->getVisibility()) {
+      case GlobalValue::DefaultVisibility:
+        sym.visibility = LDPV_DEFAULT;
+        break;
+      case GlobalValue::HiddenVisibility:
         sym.visibility = LDPV_HIDDEN;
         break;
-      case LTO_SYMBOL_SCOPE_PROTECTED:
+      case GlobalValue::ProtectedVisibility:
         sym.visibility = LDPV_PROTECTED;
         break;
-      case 0: // extern
-      case LTO_SYMBOL_SCOPE_DEFAULT:
-      case LTO_SYMBOL_SCOPE_DEFAULT_CAN_BE_HIDDEN:
-        sym.visibility = LDPV_DEFAULT;
-        break;
-      default:
-        (*message)(LDPL_ERROR, "Unknown scope attribute: %d", scope);
-        return LDPS_ERR;
+      }
     }
 
-    int definition = attrs & LTO_SYMBOL_DEFINITION_MASK;
-    sym.comdat_key = NULL;
-    switch (definition) {
-      case LTO_SYMBOL_DEFINITION_REGULAR:
-        sym.def = LDPK_DEF;
-        break;
-      case LTO_SYMBOL_DEFINITION_UNDEFINED:
-        sym.def = LDPK_UNDEF;
-        break;
-      case LTO_SYMBOL_DEFINITION_TENTATIVE:
-        sym.def = LDPK_COMMON;
-        break;
-      case LTO_SYMBOL_DEFINITION_WEAK:
-        sym.comdat_key = sym.name;
-        sym.def = LDPK_WEAKDEF;
-        break;
-      case LTO_SYMBOL_DEFINITION_WEAKUNDEF:
+    if (Symflags & object::BasicSymbolRef::SF_Undefined) {
+      sym.def = LDPK_UNDEF;
+      if (GV && GV->hasExternalWeakLinkage())
         sym.def = LDPK_WEAKUNDEF;
-        break;
-      default:
-        (*message)(LDPL_ERROR, "Unknown definition attribute: %d", definition);
-        return LDPS_ERR;
+    } else {
+      sym.def = LDPK_DEF;
+      if (GV) {
+        assert(!GV->hasExternalWeakLinkage() &&
+               !GV->hasAvailableExternallyLinkage() && "Not a declaration!");
+        if (GV->hasCommonLinkage())
+          sym.def = LDPK_COMMON;
+        else if (GV->isWeakForLinker())
+          sym.def = LDPK_WEAKDEF;
+      }
     }
 
     sym.size = 0;
+    sym.comdat_key = nullptr;
+    if (GV) {
+      const GlobalObject *Base = getBaseObject(*GV);
+      if (!Base)
+        message(LDPL_FATAL, "Unable to determine comdat of alias!");
+      const Comdat *C = Base->getComdat();
+      if (C)
+        sym.comdat_key = strdup(C->getName().str().c_str());
+      else if (Base->hasWeakLinkage() || Base->hasLinkOnceLinkage())
+        sym.comdat_key = strdup(sym.name);
+    }
 
     sym.resolution = LDPR_UNKNOWN;
   }
 
-  cf.syms.reserve(cf.syms.size());
-
   if (!cf.syms.empty()) {
-    if ((*add_symbols)(cf.handle, cf.syms.size(), &cf.syms[0]) != LDPS_OK) {
-      (*message)(LDPL_ERROR, "Unable to add symbols!");
+    if (add_symbols(cf.handle, cf.syms.size(), &cf.syms[0]) != LDPS_OK) {
+      message(LDPL_ERROR, "Unable to add symbols!");
       return LDPS_ERR;
     }
   }
 
-  if (CodeGen) {
-    std::string Error;
-    if (!CodeGen->addModule(M, Error)) {
-      (*message)(LDPL_ERROR, "Error linking module: %s", Error.c_str());
-      return LDPS_ERR;
-    }
+  return LDPS_OK;
+}
+
+static void keepGlobalValue(GlobalValue &GV,
+                            std::vector<GlobalAlias *> &KeptAliases) {
+  assert(!GV.hasLocalLinkage());
+
+  if (auto *GA = dyn_cast<GlobalAlias>(&GV))
+    KeptAliases.push_back(GA);
+
+  switch (GV.getLinkage()) {
+  default:
+    break;
+  case GlobalValue::LinkOnceAnyLinkage:
+    GV.setLinkage(GlobalValue::WeakAnyLinkage);
+    break;
+  case GlobalValue::LinkOnceODRLinkage:
+    GV.setLinkage(GlobalValue::WeakODRLinkage);
+    break;
   }
 
-  delete M;
+  assert(!GV.isDiscardableIfUnused());
+}
 
-  return LDPS_OK;
+static void internalize(GlobalValue &GV) {
+  if (GV.isDeclarationForLinker())
+    return; // We get here if there is a matching asm definition.
+  if (!GV.hasLocalLinkage())
+    GV.setLinkage(GlobalValue::InternalLinkage);
 }
 
-static bool mustPreserve(const claimed_file &F, int i) {
-  if (F.syms[i].resolution == LDPR_PREVAILING_DEF)
-    return true;
-  if (F.syms[i].resolution == LDPR_PREVAILING_DEF_IRONLY_EXP)
-    return CannotBeHidden.count(F.syms[i].name);
-  return false;
+static void drop(GlobalValue &GV) {
+  if (auto *F = dyn_cast<Function>(&GV)) {
+    F->deleteBody();
+    F->setComdat(nullptr); // Should deleteBody do this?
+    return;
+  }
+
+  if (auto *Var = dyn_cast<GlobalVariable>(&GV)) {
+    Var->setInitializer(nullptr);
+    Var->setLinkage(
+        GlobalValue::ExternalLinkage); // Should setInitializer do this?
+    Var->setComdat(nullptr); // and this?
+    return;
+  }
+
+  auto &Alias = cast<GlobalAlias>(GV);
+  Module &M = *Alias.getParent();
+  PointerType &Ty = *cast<PointerType>(Alias.getType());
+  GlobalValue::LinkageTypes L = Alias.getLinkage();
+  auto *Var =
+      new GlobalVariable(M, Ty.getElementType(), /*isConstant*/ false, L,
+                         /*Initializer*/ nullptr);
+  Var->takeName(&Alias);
+  Alias.replaceAllUsesWith(Var);
+  Alias.eraseFromParent();
 }
 
-/// all_symbols_read_hook - gold informs us that all symbols have been read.
-/// At this point, we use get_symbols to see if any of our definitions have
-/// been overridden by a native object file. Then, perform optimization and
-/// codegen.
-static ld_plugin_status all_symbols_read_hook(void) {
-  // FIXME: raw_fd_ostream should be able to represent an unopened file.
-  std::unique_ptr<raw_fd_ostream> api_file;
+static const char *getResolutionName(ld_plugin_symbol_resolution R) {
+  switch (R) {
+  case LDPR_UNKNOWN:
+    return "UNKNOWN";
+  case LDPR_UNDEF:
+    return "UNDEF";
+  case LDPR_PREVAILING_DEF:
+    return "PREVAILING_DEF";
+  case LDPR_PREVAILING_DEF_IRONLY:
+    return "PREVAILING_DEF_IRONLY";
+  case LDPR_PREEMPTED_REG:
+    return "PREEMPTED_REG";
+  case LDPR_PREEMPTED_IR:
+    return "PREEMPTED_IR";
+  case LDPR_RESOLVED_IR:
+    return "RESOLVED_IR";
+  case LDPR_RESOLVED_EXEC:
+    return "RESOLVED_EXEC";
+  case LDPR_RESOLVED_DYN:
+    return "RESOLVED_DYN";
+  case LDPR_PREVAILING_DEF_IRONLY_EXP:
+    return "PREVAILING_DEF_IRONLY_EXP";
+  }
+  llvm_unreachable("Unknown resolution");
+}
+
+namespace {
+class LocalValueMaterializer : public ValueMaterializer {
+  DenseSet<GlobalValue *> &Dropped;
+  DenseMap<GlobalObject *, GlobalObject *> LocalVersions;
+
+public:
+  LocalValueMaterializer(DenseSet<GlobalValue *> &Dropped) : Dropped(Dropped) {}
+  Value *materializeValueFor(Value *V) override;
+};
+}
+
+Value *LocalValueMaterializer::materializeValueFor(Value *V) {
+  auto *GO = dyn_cast<GlobalObject>(V);
+  if (!GO)
+    return nullptr;
 
-  assert(CodeGen);
+  auto I = LocalVersions.find(GO);
+  if (I != LocalVersions.end())
+    return I->second;
 
-  if (options::generate_api_file) {
-    std::string Error;
-    api_file.reset(new raw_fd_ostream("apifile.txt", Error, sys::fs::F_None));
-    if (!Error.empty())
-      (*message)(LDPL_FATAL, "Unable to open apifile.txt for writing: %s",
-                 Error.c_str());
+  if (!Dropped.count(GO))
+    return nullptr;
+
+  Module &M = *GO->getParent();
+  GlobalValue::LinkageTypes L = GO->getLinkage();
+  GlobalObject *Declaration;
+  if (auto *F = dyn_cast<Function>(GO)) {
+    Declaration = Function::Create(F->getFunctionType(), L, "", &M);
+  } else {
+    auto *Var = cast<GlobalVariable>(GO);
+    Declaration = new GlobalVariable(M, Var->getType()->getElementType(),
+                                     Var->isConstant(), L,
+                                     /*Initializer*/ nullptr);
   }
+  Declaration->takeName(GO);
+  Declaration->copyAttributesFrom(GO);
+
+  GO->setLinkage(GlobalValue::InternalLinkage);
+  GO->setName(Declaration->getName());
+  Dropped.erase(GO);
+  GO->replaceAllUsesWith(Declaration);
+
+  LocalVersions[Declaration] = GO;
+
+  return GO;
+}
+
+static Constant *mapConstantToLocalCopy(Constant *C, ValueToValueMapTy &VM,
+                                        LocalValueMaterializer *Materializer) {
+  return MapValue(C, VM, RF_IgnoreMissingEntries, nullptr, Materializer);
+}
+
+static void freeSymName(ld_plugin_symbol &Sym) {
+  free(Sym.name);
+  free(Sym.comdat_key);
+  Sym.name = nullptr;
+  Sym.comdat_key = nullptr;
+}
+
+static std::unique_ptr<Module>
+getModuleForFile(LLVMContext &Context, claimed_file &F, raw_fd_ostream *ApiFile,
+                 StringSet<> &Internalize, StringSet<> &Maybe) {
+  ld_plugin_input_file File;
+  if (get_input_file(F.handle, &File) != LDPS_OK)
+    message(LDPL_FATAL, "Failed to get file information");
+
+  if (get_symbols(F.handle, F.syms.size(), &F.syms[0]) != LDPS_OK)
+    message(LDPL_FATAL, "Failed to get symbol information");
+
+  const void *View;
+  if (get_view(F.handle, &View) != LDPS_OK)
+    message(LDPL_FATAL, "Failed to get a view of file");
+
+  MemoryBufferRef BufferRef(StringRef((const char *)View, File.filesize), "");
+  ErrorOr<std::unique_ptr<object::IRObjectFile>> ObjOrErr =
+      object::IRObjectFile::create(BufferRef, Context);
+
+  if (std::error_code EC = ObjOrErr.getError())
+    message(LDPL_FATAL, "Could not read bitcode from file : %s",
+            EC.message().c_str());
+
+  if (release_input_file(F.handle) != LDPS_OK)
+    message(LDPL_FATAL, "Failed to release file information");
+
+  object::IRObjectFile &Obj = **ObjOrErr;
 
-  for (std::list<claimed_file>::iterator I = Modules.begin(),
-         E = Modules.end(); I != E; ++I) {
-    if (I->syms.empty())
+  Module &M = Obj.getModule();
+
+  SmallPtrSet<GlobalValue *, 8> Used;
+  collectUsedGlobalVariables(M, Used, /*CompilerUsed*/ false);
+
+  DenseSet<GlobalValue *> Drop;
+  std::vector<GlobalAlias *> KeptAliases;
+
+  unsigned SymNum = 0;
+  for (auto &ObjSym : Obj.symbols()) {
+    if (shouldSkip(ObjSym.getFlags()))
+      continue;
+    ld_plugin_symbol &Sym = F.syms[SymNum];
+    ++SymNum;
+
+    ld_plugin_symbol_resolution Resolution =
+        (ld_plugin_symbol_resolution)Sym.resolution;
+
+    if (options::generate_api_file)
+      *ApiFile << Sym.name << ' ' << getResolutionName(Resolution) << '\n';
+
+    GlobalValue *GV = Obj.getSymbolGV(ObjSym.getRawDataRefImpl());
+    if (!GV) {
+      freeSymName(Sym);
+      continue; // Asm symbol.
+    }
+
+    if (Resolution != LDPR_PREVAILING_DEF_IRONLY && GV->hasCommonLinkage()) {
+      // Common linkage is special. There is no single symbol that wins the
+      // resolution. Instead we have to collect the maximum alignment and size.
+      // The IR linker does that for us if we just pass it every common GV.
+      // We still have to keep track of LDPR_PREVAILING_DEF_IRONLY so we
+      // internalize once the IR linker has done its job.
+      freeSymName(Sym);
       continue;
-    (*get_symbols)(I->handle, I->syms.size(), &I->syms[0]);
-    for (unsigned i = 0, e = I->syms.size(); i != e; i++) {
-      if (mustPreserve(*I, i)) {
-        CodeGen->addMustPreserveSymbol(I->syms[i].name);
+    }
 
-        if (options::generate_api_file)
-          (*api_file) << I->syms[i].name << "\n";
+    switch (Resolution) {
+    case LDPR_UNKNOWN:
+      llvm_unreachable("Unexpected resolution");
+
+    case LDPR_RESOLVED_IR:
+    case LDPR_RESOLVED_EXEC:
+    case LDPR_RESOLVED_DYN:
+      assert(GV->isDeclarationForLinker());
+      break;
+
+    case LDPR_UNDEF:
+      assert(GV->hasComdat());
+      Drop.insert(GV);
+      break;
+
+    case LDPR_PREVAILING_DEF_IRONLY: {
+      keepGlobalValue(*GV, KeptAliases);
+      if (!Used.count(GV)) {
+        // Since we use the regular lib/Linker, we cannot just internalize GV
+        // now or it will not be copied to the merged module. Instead we force
+        // it to be copied and then internalize it.
+        Internalize.insert(GV->getName());
       }
+      break;
     }
+
+    case LDPR_PREVAILING_DEF:
+      keepGlobalValue(*GV, KeptAliases);
+      break;
+
+    case LDPR_PREEMPTED_IR:
+      // Gold might have selected a linkonce_odr and preempted a weak_odr.
+      // In that case we have to make sure we don't end up internalizing it.
+      if (!GV->isDiscardableIfUnused())
+        Maybe.erase(GV->getName());
+
+      // fall-through
+    case LDPR_PREEMPTED_REG:
+      Drop.insert(GV);
+      break;
+
+    case LDPR_PREVAILING_DEF_IRONLY_EXP: {
+      // We can only check for address uses after we merge the modules. The
+      // reason is that this GV might have a copy in another module
+      // and in that module the address might be significant, but that
+      // copy will be LDPR_PREEMPTED_IR.
+      if (GV->hasLinkOnceODRLinkage())
+        Maybe.insert(GV->getName());
+      keepGlobalValue(*GV, KeptAliases);
+      break;
+    }
+    }
+
+    freeSymName(Sym);
   }
 
-  CodeGen->setCodePICModel(output_type);
-  CodeGen->setDebugInfo(LTO_DEBUG_MODEL_DWARF);
-  if (!options::mcpu.empty())
-    CodeGen->setCpu(options::mcpu.c_str());
+  ValueToValueMapTy VM;
+  LocalValueMaterializer Materializer(Drop);
+  for (GlobalAlias *GA : KeptAliases) {
+    // Gold told us to keep GA. It is possible that a GV usied in the aliasee
+    // expression is being dropped. If that is the case, that GV must be copied.
+    Constant *Aliasee = GA->getAliasee();
+    Constant *Replacement = mapConstantToLocalCopy(Aliasee, VM, &Materializer);
+    GA->setAliasee(Replacement);
+  }
 
-  if (options::generate_bc_file != options::BC_NO) {
-    std::string path;
-    if (options::generate_bc_file == options::BC_ONLY)
-      path = output_name;
-    else if (!options::bc_path.empty())
-      path = options::bc_path;
-    else
-      path = output_name + ".bc";
-    std::string Error;
-    if (!CodeGen->writeMergedModules(path.c_str(), Error))
-      (*message)(LDPL_FATAL, "Failed to write the output file.");
-    if (options::generate_bc_file == options::BC_ONLY) {
-      delete CodeGen;
-      exit(0);
-    }
+  for (auto *GV : Drop)
+    drop(*GV);
+
+  return Obj.takeModule();
+}
+
+static void runLTOPasses(Module &M, TargetMachine &TM) {
+  PassManager passes;
+  PassManagerBuilder PMB;
+  PMB.LibraryInfo = new TargetLibraryInfo(Triple(TM.getTargetTriple()));
+  PMB.Inliner = createFunctionInliningPass();
+  PMB.VerifyInput = true;
+  PMB.VerifyOutput = true;
+  PMB.LoopVectorize = true;
+  PMB.SLPVectorize = true;
+  PMB.populateLTOPassManager(passes, &TM);
+  passes.run(M);
+}
+
+static void saveBCFile(StringRef Path, Module &M) {
+  std::error_code EC;
+  raw_fd_ostream OS(Path, EC, sys::fs::OpenFlags::F_None);
+  if (EC)
+    message(LDPL_FATAL, "Failed to write the output file.");
+  WriteBitcodeToFile(&M, OS);
+}
+
+static void codegen(Module &M) {
+  const std::string &TripleStr = M.getTargetTriple();
+  Triple TheTriple(TripleStr);
+
+  std::string ErrMsg;
+  const Target *TheTarget = TargetRegistry::lookupTarget(TripleStr, ErrMsg);
+  if (!TheTarget)
+    message(LDPL_FATAL, "Target not found: %s", ErrMsg.c_str());
+
+  if (unsigned NumOpts = options::extra.size())
+    cl::ParseCommandLineOptions(NumOpts, &options::extra[0]);
+
+  SubtargetFeatures Features;
+  Features.getDefaultSubtargetFeatures(TheTriple);
+  for (const std::string &A : MAttrs)
+    Features.AddFeature(A);
+
+  TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
+  std::unique_ptr<TargetMachine> TM(TheTarget->createTargetMachine(
+      TripleStr, options::mcpu, Features.getString(), Options, RelocationModel,
+      CodeModel::Default, CodeGenOpt::Aggressive));
+
+  runLTOPasses(M, *TM);
+
+  if (options::TheOutputType == options::OT_SAVE_TEMPS)
+    saveBCFile(output_name + ".opt.bc", M);
+
+  PassManager CodeGenPasses;
+  CodeGenPasses.add(new DataLayoutPass());
+
+  SmallString<128> Filename;
+  int FD;
+  if (options::obj_path.empty()) {
+    std::error_code EC =
+        sys::fs::createTemporaryFile("lto-llvm", "o", FD, Filename);
+    if (EC)
+      message(LDPL_FATAL, "Could not create temporary file: %s",
+              EC.message().c_str());
+  } else {
+    Filename = options::obj_path;
+    std::error_code EC =
+        sys::fs::openFileForWrite(Filename.c_str(), FD, sys::fs::F_None);
+    if (EC)
+      message(LDPL_FATAL, "Could not open file: %s", EC.message().c_str());
   }
 
-  std::string ObjPath;
   {
-    const char *Temp;
-    std::string Error;
-    if (!CodeGen->compile_to_file(&Temp, /*DisableOpt*/ false, /*DisableInline*/
-                                  false, /*DisableGVNLoadPRE*/ false, Error))
-      (*message)(LDPL_ERROR, "Could not produce a combined object file\n");
-    ObjPath = Temp;
+    raw_fd_ostream OS(FD, true);
+    formatted_raw_ostream FOS(OS);
+
+    if (TM->addPassesToEmitFile(CodeGenPasses, FOS,
+                                TargetMachine::CGFT_ObjectFile))
+      message(LDPL_FATAL, "Failed to setup codegen");
+    CodeGenPasses.run(M);
   }
 
-  delete CodeGen;
-  for (std::list<claimed_file>::iterator I = Modules.begin(),
-         E = Modules.end(); I != E; ++I) {
-    for (unsigned i = 0; i != I->syms.size(); ++i) {
-      ld_plugin_symbol &sym = I->syms[i];
-      free(sym.name);
+  if (add_input_file(Filename.c_str()) != LDPS_OK)
+    message(LDPL_FATAL,
+            "Unable to add .o file to the link. File left behind in: %s",
+            Filename.c_str());
+
+  if (options::obj_path.empty())
+    Cleanup.push_back(Filename.c_str());
+}
+
+/// gold informs us that all symbols have been read. At this point, we use
+/// get_symbols to see if any of our definitions have been overridden by a
+/// native object file. Then, perform optimization and codegen.
+static ld_plugin_status allSymbolsReadHook(raw_fd_ostream *ApiFile) {
+  if (Modules.empty())
+    return LDPS_OK;
+
+  LLVMContext Context;
+  std::unique_ptr<Module> Combined(new Module("ld-temp.o", Context));
+  Linker L(Combined.get());
+
+  std::string DefaultTriple = sys::getDefaultTargetTriple();
+
+  StringSet<> Internalize;
+  StringSet<> Maybe;
+  for (claimed_file &F : Modules) {
+    std::unique_ptr<Module> M =
+        getModuleForFile(Context, F, ApiFile, Internalize, Maybe);
+    if (!options::triple.empty())
+      M->setTargetTriple(options::triple.c_str());
+    else if (M->getTargetTriple().empty()) {
+      M->setTargetTriple(DefaultTriple);
     }
+
+    if (L.linkInModule(M.get()))
+      message(LDPL_FATAL, "Failed to link module");
   }
 
-  if ((*add_input_file)(ObjPath.c_str()) != LDPS_OK) {
-    (*message)(LDPL_ERROR, "Unable to add .o file to the link.");
-    (*message)(LDPL_ERROR, "File left behind in: %s", ObjPath.c_str());
-    return LDPS_ERR;
+  for (const auto &Name : Internalize) {
+    GlobalValue *GV = Combined->getNamedValue(Name.first());
+    if (GV)
+      internalize(*GV);
   }
 
-  if (!options::extra_library_path.empty() &&
-      set_extra_library_path(options::extra_library_path.c_str()) != LDPS_OK) {
-    (*message)(LDPL_ERROR, "Unable to set the extra library path.");
-    return LDPS_ERR;
+  for (const auto &Name : Maybe) {
+    GlobalValue *GV = Combined->getNamedValue(Name.first());
+    if (!GV)
+      continue;
+    GV->setLinkage(GlobalValue::LinkOnceODRLinkage);
+    if (canBeOmittedFromSymbolTable(GV))
+      internalize(*GV);
   }
 
-  if (options::obj_path.empty())
-    Cleanup.push_back(ObjPath);
+  if (options::TheOutputType == options::OT_DISABLE)
+    return LDPS_OK;
+
+  if (options::TheOutputType != options::OT_NORMAL) {
+    std::string path;
+    if (options::TheOutputType == options::OT_BC_ONLY)
+      path = output_name;
+    else
+      path = output_name + ".bc";
+    saveBCFile(path, *L.getModule());
+    if (options::TheOutputType == options::OT_BC_ONLY)
+      return LDPS_OK;
+  }
+
+  codegen(*L.getModule());
+
+  if (!options::extra_library_path.empty() &&
+      set_extra_library_path(options::extra_library_path.c_str()) != LDPS_OK)
+    message(LDPL_FATAL, "Unable to set the extra library path.");
 
   return LDPS_OK;
 }
 
+static ld_plugin_status all_symbols_read_hook(void) {
+  ld_plugin_status Ret;
+  if (!options::generate_api_file) {
+    Ret = allSymbolsReadHook(nullptr);
+  } else {
+    std::error_code EC;
+    raw_fd_ostream ApiFile("apifile.txt", EC, sys::fs::F_None);
+    if (EC)
+      message(LDPL_FATAL, "Unable to open apifile.txt for writing: %s",
+              EC.message().c_str());
+    Ret = allSymbolsReadHook(&ApiFile);
+  }
+
+  llvm_shutdown();
+
+  if (options::TheOutputType == options::OT_BC_ONLY ||
+      options::TheOutputType == options::OT_DISABLE)
+    exit(0);
+
+  return Ret;
+}
+
 static ld_plugin_status cleanup_hook(void) {
-  for (int i = 0, e = Cleanup.size(); i != e; ++i) {
-    std::error_code EC = sys::fs::remove(Cleanup[i]);
+  for (std::string &Name : Cleanup) {
+    std::error_code EC = sys::fs::remove(Name);
     if (EC)
-      (*message)(LDPL_ERROR, "Failed to delete '%s': %s", Cleanup[i].c_str(),
-                 EC.message().c_str());
+      message(LDPL_ERROR, "Failed to delete '%s': %s", Name.c_str(),
+              EC.message().c_str());
   }
 
   return LDPS_OK;
diff --git a/tools/llc/llc.cpp b/tools/llc/llc.cpp
index 09ff4613b972..35f965b2a300 100644
--- a/tools/llc/llc.cpp
+++ b/tools/llc/llc.cpp
@@ -41,6 +41,7 @@
 #include "llvm/Support/ToolOutputFile.h"
 #include "llvm/Target/TargetLibraryInfo.h"
 #include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetSubtargetInfo.h"
 #include <memory>
 using namespace llvm;
 
@@ -94,32 +95,20 @@ static cl::opt<bool> AsmVerbose("asm-verbose",
 
 static int compileModule(char **, LLVMContext &);
 
-// GetFileNameRoot - Helper function to get the basename of a filename.
-static inline std::string
-GetFileNameRoot(const std::string &InputFilename) {
-  std::string IFN = InputFilename;
-  std::string outputFilename;
-  int Len = IFN.length();
-  if ((Len > 2) &&
-      IFN[Len-3] == '.' &&
-      ((IFN[Len-2] == 'b' && IFN[Len-1] == 'c') ||
-       (IFN[Len-2] == 'l' && IFN[Len-1] == 'l'))) {
-    outputFilename = std::string(IFN.begin(), IFN.end()-3); // s/.bc/.s/
-  } else {
-    outputFilename = IFN;
-  }
-  return outputFilename;
-}
-
-static tool_output_file *GetOutputStream(const char *TargetName,
-                                         Triple::OSType OS,
-                                         const char *ProgName) {
+static std::unique_ptr<tool_output_file>
+GetOutputStream(const char *TargetName, Triple::OSType OS,
+                const char *ProgName) {
   // If we don't yet have an output filename, make one.
   if (OutputFilename.empty()) {
     if (InputFilename == "-")
       OutputFilename = "-";
     else {
-      OutputFilename = GetFileNameRoot(InputFilename);
+      // If InputFilename ends in .bc or .ll, remove it.
+      StringRef IFN = InputFilename;
+      if (IFN.endswith(".bc") || IFN.endswith(".ll"))
+        OutputFilename = IFN.drop_back(3);
+      else
+        OutputFilename = IFN;
 
       switch (FileType) {
       case TargetMachine::CGFT_AssemblyFile:
@@ -158,15 +147,14 @@ static tool_output_file *GetOutputStream(const char *TargetName,
   }
 
   // Open the file.
-  std::string error;
+  std::error_code EC;
   sys::fs::OpenFlags OpenFlags = sys::fs::F_None;
   if (!Binary)
     OpenFlags |= sys::fs::F_Text;
-  tool_output_file *FDOut = new tool_output_file(OutputFilename.c_str(), error,
-                                                 OpenFlags);
-  if (!error.empty()) {
-    errs() << error << '\n';
-    delete FDOut;
+  auto FDOut = llvm::make_unique<tool_output_file>(OutputFilename, EC,
+                                                   OpenFlags);
+  if (EC) {
+    errs() << EC.message() << '\n';
     return nullptr;
   }
 
@@ -217,7 +205,6 @@ static int compileModule(char **argv, LLVMContext &Context) {
   // Load the module to be compiled...
   SMDiagnostic Err;
   std::unique_ptr<Module> M;
-  Module *mod = nullptr;
   Triple TheTriple;
 
   bool SkipModule = MCPU == "help" ||
@@ -231,17 +218,16 @@ static int compileModule(char **argv, LLVMContext &Context) {
 
   // If user just wants to list available options, skip module loading
   if (!SkipModule) {
-    M.reset(ParseIRFile(InputFilename, Err, Context));
-    mod = M.get();
-    if (mod == nullptr) {
+    M = parseIRFile(InputFilename, Err, Context);
+    if (!M) {
       Err.print(argv[0], errs());
       return 1;
     }
 
     // If we are supposed to override the target triple, do so now.
     if (!TargetTriple.empty())
-      mod->setTargetTriple(Triple::normalize(TargetTriple));
-    TheTriple = Triple(mod->getTargetTriple());
+      M->setTargetTriple(Triple::normalize(TargetTriple));
+    TheTriple = Triple(M->getTargetTriple());
   } else {
     TheTriple = Triple(Triple::normalize(TargetTriple));
   }
@@ -285,10 +271,10 @@ static int compileModule(char **argv, LLVMContext &Context) {
   Options.MCOptions.MCUseDwarfDirectory = EnableDwarfDirectory;
   Options.MCOptions.AsmVerbose = AsmVerbose;
 
-  std::unique_ptr<TargetMachine> target(
+  std::unique_ptr<TargetMachine> Target(
       TheTarget->createTargetMachine(TheTriple.getTriple(), MCPU, FeaturesStr,
                                      Options, RelocModel, CMModel, OLvl));
-  assert(target.get() && "Could not allocate target machine!");
+  assert(Target && "Could not allocate target machine!");
 
   // If we don't have a module then just exit now. We do this down
   // here since the CPU/Feature help is underneath the target machine
@@ -296,15 +282,14 @@ static int compileModule(char **argv, LLVMContext &Context) {
   if (SkipModule)
     return 0;
 
-  assert(mod && "Should have exited if we didn't have a module!");
-  TargetMachine &Target = *target.get();
+  assert(M && "Should have exited if we didn't have a module!");
 
   if (GenerateSoftFloatCalls)
     FloatABIForCalls = FloatABI::Soft;
 
   // Figure out where we are going to send the output.
-  std::unique_ptr<tool_output_file> Out(
-      GetOutputStream(TheTarget->getName(), TheTriple.getOS(), argv[0]));
+  std::unique_ptr<tool_output_file> Out =
+      GetOutputStream(TheTarget->getName(), TheTriple.getOS(), argv[0]);
   if (!Out) return 1;
 
   // Build up all of the passes that we want to do to the module.
@@ -317,9 +302,9 @@ static int compileModule(char **argv, LLVMContext &Context) {
   PM.add(TLI);
 
   // Add the target data from the target machine, if it exists, or the module.
-  if (const DataLayout *DL = Target.getDataLayout())
-    mod->setDataLayout(DL);
-  PM.add(new DataLayoutPass(mod));
+  if (const DataLayout *DL = Target->getSubtargetImpl()->getDataLayout())
+    M->setDataLayout(DL);
+  PM.add(new DataLayoutPass());
 
   if (RelaxAll.getNumOccurrences() > 0 &&
       FileType != TargetMachine::CGFT_ObjectFile)
@@ -350,8 +335,8 @@ static int compileModule(char **argv, LLVMContext &Context) {
     }
 
     // Ask the target to add backend passes as necessary.
-    if (Target.addPassesToEmitFile(PM, FOS, FileType, NoVerify,
-                                   StartAfterID, StopAfterID)) {
+    if (Target->addPassesToEmitFile(PM, FOS, FileType, NoVerify,
+                                    StartAfterID, StopAfterID)) {
       errs() << argv[0] << ": target does not support generation of this"
              << " file type!\n";
       return 1;
@@ -360,7 +345,7 @@ static int compileModule(char **argv, LLVMContext &Context) {
     // Before executing passes, print the final values of the LLVM options.
     cl::PrintOptionValues();
 
-    PM.run(*mod);
+    PM.run(*M);
   }
 
   // Declare success.
diff --git a/tools/lli/CMakeLists.txt b/tools/lli/CMakeLists.txt
index 41f75349dfeb..3610d76d8fd4 100644
--- a/tools/lli/CMakeLists.txt
+++ b/tools/lli/CMakeLists.txt
@@ -7,7 +7,6 @@ set(LLVM_LINK_COMPONENTS
   IRReader
   Instrumentation
   Interpreter
-  JIT
   MC
   MCJIT
   Object
diff --git a/tools/lli/ChildTarget/ChildTarget.cpp b/tools/lli/ChildTarget/ChildTarget.cpp
index 0d71b17c63dd..6c537d47df3d 100644
--- a/tools/lli/ChildTarget/ChildTarget.cpp
+++ b/tools/lli/ChildTarget/ChildTarget.cpp
@@ -97,15 +97,15 @@ void LLIChildTarget::handleMessage(LLIMessageType messageType) {
 // Incoming message handlers
 void LLIChildTarget::handleAllocateSpace() {
   // Read and verify the message data size.
-  uint32_t DataSize;
+  uint32_t DataSize = 0;
   int rc = ReadBytes(&DataSize, 4);
   (void)rc;
   assert(rc == 4);
   assert(DataSize == 8);
 
   // Read the message arguments.
-  uint32_t Alignment;
-  uint32_t AllocSize;
+  uint32_t Alignment = 0;
+  uint32_t AllocSize = 0;
   rc = ReadBytes(&Alignment, 4);
   assert(rc == 4);
   rc = ReadBytes(&AllocSize, 4);
@@ -121,13 +121,13 @@ void LLIChildTarget::handleAllocateSpace() {
 
 void LLIChildTarget::handleLoadSection(bool IsCode) {
   // Read the message data size.
-  uint32_t DataSize;
+  uint32_t DataSize = 0;
   int rc = ReadBytes(&DataSize, 4);
   (void)rc;
   assert(rc == 4);
 
   // Read the target load address.
-  uint64_t Addr;
+  uint64_t Addr = 0;
   rc = ReadBytes(&Addr, 8);
   assert(rc == 8);
   size_t BufferSize = DataSize - 8;
@@ -150,14 +150,14 @@ void LLIChildTarget::handleLoadSection(bool IsCode) {
 
 void LLIChildTarget::handleExecute() {
   // Read the message data size.
-  uint32_t DataSize;
+  uint32_t DataSize = 0;
   int rc = ReadBytes(&DataSize, 4);
   (void)rc;
   assert(rc == 4);
   assert(DataSize == 8);
 
   // Read the target address.
-  uint64_t Addr;
+  uint64_t Addr = 0;
   rc = ReadBytes(&Addr, 8);
   assert(rc == 8);
 
diff --git a/tools/lli/LLVMBuild.txt b/tools/lli/LLVMBuild.txt
index aab2a208dee4..4c14c47bd0d5 100644
--- a/tools/lli/LLVMBuild.txt
+++ b/tools/lli/LLVMBuild.txt
@@ -22,4 +22,4 @@ subdirectories = ChildTarget
 type = Tool
 name = lli
 parent = Tools
-required_libraries = AsmParser BitReader IRReader Instrumentation Interpreter JIT MCJIT NativeCodeGen SelectionDAG Native
+required_libraries = AsmParser BitReader IRReader Instrumentation Interpreter MCJIT NativeCodeGen SelectionDAG Native
diff --git a/tools/lli/Makefile b/tools/lli/Makefile
index eca5d8331490..94d6f061c946 100644
--- a/tools/lli/Makefile
+++ b/tools/lli/Makefile
@@ -14,7 +14,7 @@ PARALLEL_DIRS := ChildTarget
 
 include $(LEVEL)/Makefile.config
 
-LINK_COMPONENTS := mcjit jit instrumentation interpreter nativecodegen bitreader asmparser irreader selectiondag native
+LINK_COMPONENTS := mcjit instrumentation interpreter nativecodegen bitreader asmparser irreader selectiondag native
 
 # If Intel JIT Events support is confiured, link against the LLVM Intel JIT
 # Events interface library
diff --git a/tools/lli/RPCChannel.h b/tools/lli/RPCChannel.h
index 2d8c70812847..ebd3c65640bc 100644
--- a/tools/lli/RPCChannel.h
+++ b/tools/lli/RPCChannel.h
@@ -12,8 +12,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLI_RPCCHANNEL_H
-#define LLI_RPCCHANNEL_H
+#ifndef LLVM_TOOLS_LLI_RPCCHANNEL_H
+#define LLVM_TOOLS_LLI_RPCCHANNEL_H
 
 #include <stdlib.h>
 #include <string>
@@ -46,4 +46,4 @@ public:
 
 } // end namespace llvm
 
-#endif // LLI_RPCCHANNEL_H
+#endif
diff --git a/tools/lli/RemoteMemoryManager.cpp b/tools/lli/RemoteMemoryManager.cpp
index 481651772afc..47da8fb60c98 100644
--- a/tools/lli/RemoteMemoryManager.cpp
+++ b/tools/lli/RemoteMemoryManager.cpp
@@ -14,7 +14,6 @@
 
 #include "RemoteMemoryManager.h"
 #include "llvm/ExecutionEngine/ExecutionEngine.h"
-#include "llvm/ExecutionEngine/ObjectImage.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/Format.h"
 
@@ -78,7 +77,7 @@ sys::MemoryBlock RemoteMemoryManager::allocateSection(uintptr_t Size) {
 }
 
 void RemoteMemoryManager::notifyObjectLoaded(ExecutionEngine *EE,
-                                                const ObjectImage *Obj) {
+                                             const object::ObjectFile &Obj) {
   // The client should have called setRemoteTarget() before triggering any
   // code generation.
   assert(Target);
@@ -172,36 +171,3 @@ bool RemoteMemoryManager::finalizeMemory(std::string *ErrMsg) {
 
   return false;
 }
-
-void RemoteMemoryManager::setMemoryWritable() { llvm_unreachable("Unexpected!"); }
-void RemoteMemoryManager::setMemoryExecutable() { llvm_unreachable("Unexpected!"); }
-void RemoteMemoryManager::setPoisonMemory(bool poison) { llvm_unreachable("Unexpected!"); }
-void RemoteMemoryManager::AllocateGOT() { llvm_unreachable("Unexpected!"); }
-uint8_t *RemoteMemoryManager::getGOTBase() const {
-  llvm_unreachable("Unexpected!");
-  return nullptr;
-}
-uint8_t *RemoteMemoryManager::startFunctionBody(const Function *F, uintptr_t &ActualSize){
-  llvm_unreachable("Unexpected!");
-  return nullptr;
-}
-uint8_t *RemoteMemoryManager::allocateStub(const GlobalValue* F, unsigned StubSize,
-                                              unsigned Alignment) {
-  llvm_unreachable("Unexpected!");
-  return nullptr;
-}
-void RemoteMemoryManager::endFunctionBody(const Function *F, uint8_t *FunctionStart,
-                                             uint8_t *FunctionEnd) {
-  llvm_unreachable("Unexpected!");
-}
-uint8_t *RemoteMemoryManager::allocateSpace(intptr_t Size, unsigned Alignment) {
-  llvm_unreachable("Unexpected!");
-  return nullptr;
-}
-uint8_t *RemoteMemoryManager::allocateGlobal(uintptr_t Size, unsigned Alignment) {
-  llvm_unreachable("Unexpected!");
-  return nullptr;
-}
-void RemoteMemoryManager::deallocateFunctionBody(void *Body) {
-  llvm_unreachable("Unexpected!");
-}
diff --git a/tools/lli/RemoteMemoryManager.h b/tools/lli/RemoteMemoryManager.h
index cf5d7c6e5db8..895bcdac4d14 100644
--- a/tools/lli/RemoteMemoryManager.h
+++ b/tools/lli/RemoteMemoryManager.h
@@ -12,20 +12,20 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef REMOTEMEMORYMANAGER_H
-#define REMOTEMEMORYMANAGER_H
+#ifndef LLVM_TOOLS_LLI_REMOTEMEMORYMANAGER_H
+#define LLVM_TOOLS_LLI_REMOTEMEMORYMANAGER_H
 
 #include "RemoteTarget.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/SmallVector.h"
-#include "llvm/ExecutionEngine/JITMemoryManager.h"
+#include "llvm/ExecutionEngine/RTDyldMemoryManager.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/Memory.h"
 #include <utility>
 
 namespace llvm {
 
-class RemoteMemoryManager : public JITMemoryManager {
+class RemoteMemoryManager : public RTDyldMemoryManager {
 public:
   // Notice that this structure takes ownership of the memory allocated.
   struct Allocation {
@@ -80,7 +80,8 @@ public:
   // symbols from Modules it contains.
   uint64_t getSymbolAddress(const std::string &Name) override { return 0; }
 
-  void notifyObjectLoaded(ExecutionEngine *EE, const ObjectImage *Obj) override;
+  void notifyObjectLoaded(ExecutionEngine *EE,
+                          const object::ObjectFile &Obj) override;
 
   bool finalizeMemory(std::string *ErrMsg) override;
 
@@ -93,22 +94,6 @@ public:
 
   // This is a non-interface function used by lli
   void setRemoteTarget(RemoteTarget *T) { Target = T; }
-
-  // The following obsolete JITMemoryManager calls are stubbed out for
-  // this model.
-  void setMemoryWritable() override;
-  void setMemoryExecutable() override;
-  void setPoisonMemory(bool poison) override;
-  void AllocateGOT() override;
-  uint8_t *getGOTBase() const override;
-  uint8_t *startFunctionBody(const Function *F, uintptr_t &ActualSize) override;
-  uint8_t *allocateStub(const GlobalValue* F, unsigned StubSize,
-                        unsigned Alignment) override;
-  void endFunctionBody(const Function *F, uint8_t *FunctionStart,
-                       uint8_t *FunctionEnd) override;
-  uint8_t *allocateSpace(intptr_t Size, unsigned Alignment) override;
-  uint8_t *allocateGlobal(uintptr_t Size, unsigned Alignment) override;
-  void deallocateFunctionBody(void *Body) override;
 };
 
 } // end namespace llvm
diff --git a/tools/lli/RemoteTarget.h b/tools/lli/RemoteTarget.h
index 73e8ae2284db..ee758a2747a4 100644
--- a/tools/lli/RemoteTarget.h
+++ b/tools/lli/RemoteTarget.h
@@ -12,8 +12,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef REMOTEPROCESS_H
-#define REMOTEPROCESS_H
+#ifndef LLVM_TOOLS_LLI_REMOTETARGET_H
+#define LLVM_TOOLS_LLI_REMOTETARGET_H
 
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringRef.h"
diff --git a/tools/lli/RemoteTargetExternal.h b/tools/lli/RemoteTargetExternal.h
index f87fc6199f33..bb621f5c50f0 100644
--- a/tools/lli/RemoteTargetExternal.h
+++ b/tools/lli/RemoteTargetExternal.h
@@ -12,8 +12,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLI_REMOTETARGETEXTERNAL_H
-#define LLI_REMOTETARGETEXTERNAL_H
+#ifndef LLVM_TOOLS_LLI_REMOTETARGETEXTERNAL_H
+#define LLVM_TOOLS_LLI_REMOTETARGETEXTERNAL_H
 
 #include "RPCChannel.h"
 #include "RemoteTarget.h"
@@ -140,4 +140,4 @@ private:
 
 } // end namespace llvm
 
-#endif // LLI_REMOTETARGETEXTERNAL_H
+#endif
diff --git a/tools/lli/RemoteTargetMessage.h b/tools/lli/RemoteTargetMessage.h
index cb934a1066b0..c210e4b3d6b8 100644
--- a/tools/lli/RemoteTargetMessage.h
+++ b/tools/lli/RemoteTargetMessage.h
@@ -12,8 +12,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLI_REMOTETARGETMESSAGE_H
-#define LLI_REMOTETARGETMESSAGE_H
+#ifndef LLVM_TOOLS_LLI_REMOTETARGETMESSAGE_H
+#define LLVM_TOOLS_LLI_REMOTETARGETMESSAGE_H
 
 namespace llvm {
 
diff --git a/tools/lli/lli.cpp b/tools/lli/lli.cpp
index 48828c1d68a7..730911b07c65 100644
--- a/tools/lli/lli.cpp
+++ b/tools/lli/lli.cpp
@@ -22,9 +22,7 @@
 #include "llvm/CodeGen/LinkAllCodegenComponents.h"
 #include "llvm/ExecutionEngine/GenericValue.h"
 #include "llvm/ExecutionEngine/Interpreter.h"
-#include "llvm/ExecutionEngine/JIT.h"
 #include "llvm/ExecutionEngine/JITEventListener.h"
-#include "llvm/ExecutionEngine/JITMemoryManager.h"
 #include "llvm/ExecutionEngine/MCJIT.h"
 #include "llvm/ExecutionEngine/ObjectCache.h"
 #include "llvm/ExecutionEngine/SectionMemoryManager.h"
@@ -76,14 +74,6 @@ namespace {
                                  cl::desc("Force interpretation: disable JIT"),
                                  cl::init(false));
 
-  cl::opt<bool> UseMCJIT(
-    "use-mcjit", cl::desc("Enable use of the MC-based JIT (if available)"),
-    cl::init(false));
-
-  cl::opt<bool> DebugIR(
-    "debug-ir", cl::desc("Generate debug information to allow debugging IR."),
-    cl::init(false));
-
   // The MCJIT supports building for a target address space separate from
   // the JIT compilation process. Use a forked process and a copying
   // memory manager with IPC to execute using this functionality.
@@ -263,23 +253,23 @@ public:
   }
   virtual ~LLIObjectCache() {}
 
-  void notifyObjectCompiled(const Module *M, const MemoryBuffer *Obj) override {
+  void notifyObjectCompiled(const Module *M, MemoryBufferRef Obj) override {
     const std::string ModuleID = M->getModuleIdentifier();
     std::string CacheName;
     if (!getCacheFilename(ModuleID, CacheName))
       return;
-    std::string errStr;
     if (!CacheDir.empty()) { // Create user-defined cache dir.
       SmallString<128> dir(CacheName);
       sys::path::remove_filename(dir);
       sys::fs::create_directories(Twine(dir));
     }
-    raw_fd_ostream outfile(CacheName.c_str(), errStr, sys::fs::F_None);
-    outfile.write(Obj->getBufferStart(), Obj->getBufferSize());
+    std::error_code EC;
+    raw_fd_ostream outfile(CacheName, EC, sys::fs::F_None);
+    outfile.write(Obj.getBufferStart(), Obj.getBufferSize());
     outfile.close();
   }
 
-  MemoryBuffer* getObject(const Module* M) override {
+  std::unique_ptr<MemoryBuffer> getObject(const Module* M) override {
     const std::string ModuleID = M->getModuleIdentifier();
     std::string CacheName;
     if (!getCacheFilename(ModuleID, CacheName))
@@ -345,7 +335,7 @@ static void addCygMingExtraModule(ExecutionEngine *EE,
   Triple TargetTriple(TargetTripleStr);
 
   // Create a new module.
-  Module *M = new Module("CygMingHelper", Context);
+  std::unique_ptr<Module> M = make_unique<Module>("CygMingHelper", Context);
   M->setTargetTriple(TargetTripleStr);
 
   // Create an empty function named "__main".
@@ -353,11 +343,11 @@ static void addCygMingExtraModule(ExecutionEngine *EE,
   if (TargetTriple.isArch64Bit()) {
     Result = Function::Create(
       TypeBuilder<int64_t(void), false>::get(Context),
-      GlobalValue::ExternalLinkage, "__main", M);
+      GlobalValue::ExternalLinkage, "__main", M.get());
   } else {
     Result = Function::Create(
       TypeBuilder<int32_t(void), false>::get(Context),
-      GlobalValue::ExternalLinkage, "__main", M);
+      GlobalValue::ExternalLinkage, "__main", M.get());
   }
   BasicBlock *BB = BasicBlock::Create(Context, "__main", Result);
   Builder.SetInsertPoint(BB);
@@ -369,7 +359,7 @@ static void addCygMingExtraModule(ExecutionEngine *EE,
   Builder.CreateRet(ReturnVal);
 
   // Add this new module to the ExecutionEngine.
-  EE->addModule(M);
+  EE->addModule(std::move(M));
 }
 
 
@@ -398,19 +388,17 @@ int main(int argc, char **argv, char * const *envp) {
 
   // Load the bitcode...
   SMDiagnostic Err;
-  Module *Mod = ParseIRFile(InputFile, Err, Context);
+  std::unique_ptr<Module> Owner = parseIRFile(InputFile, Err, Context);
+  Module *Mod = Owner.get();
   if (!Mod) {
     Err.print(argv[0], errs());
     return 1;
   }
 
   if (EnableCacheManager) {
-    if (UseMCJIT) {
-      std::string CacheName("file:");
-      CacheName.append(InputFile);
-      Mod->setModuleIdentifier(CacheName);
-    } else
-      errs() << "warning: -enable-cache-manager can only be used with MCJIT.";
+    std::string CacheName("file:");
+    CacheName.append(InputFile);
+    Mod->setModuleIdentifier(CacheName);
   }
 
   // If not jitting lazily, load the whole bitcode file eagerly too.
@@ -422,19 +410,8 @@ int main(int argc, char **argv, char * const *envp) {
     }
   }
 
-  if (DebugIR) {
-    if (!UseMCJIT) {
-      errs() << "warning: -debug-ir used without -use-mcjit. Only partial debug"
-        << " information will be emitted by the non-MC JIT engine. To see full"
-        << " source debug information, enable the flag '-use-mcjit'.\n";
-
-    }
-    ModulePass *DebugIRPass = createDebugIRPass();
-    DebugIRPass->runOnModule(*Mod);
-  }
-
   std::string ErrorMsg;
-  EngineBuilder builder(Mod);
+  EngineBuilder builder(std::move(Owner));
   builder.setMArch(MArch);
   builder.setMCPU(MCPU);
   builder.setMAttrs(MAttrs);
@@ -451,20 +428,20 @@ int main(int argc, char **argv, char * const *envp) {
 
   // Enable MCJIT if desired.
   RTDyldMemoryManager *RTDyldMM = nullptr;
-  if (UseMCJIT && !ForceInterpreter) {
-    builder.setUseMCJIT(true);
+  if (!ForceInterpreter) {
     if (RemoteMCJIT)
       RTDyldMM = new RemoteMemoryManager();
     else
       RTDyldMM = new SectionMemoryManager();
-    builder.setMCJITMemoryManager(RTDyldMM);
-  } else {
-    if (RemoteMCJIT) {
-      errs() << "error: Remote process execution requires -use-mcjit\n";
-      exit(1);
-    }
-    builder.setJITMemoryManager(ForceInterpreter ? nullptr :
-                                JITMemoryManager::CreateDefaultMemManager());
+
+    // Deliberately construct a temp std::unique_ptr to pass in. Do not null out
+    // RTDyldMM: We still use it below, even though we don't own it.
+    builder.setMCJITMemoryManager(
+      std::unique_ptr<RTDyldMemoryManager>(RTDyldMM));
+  } else if (RemoteMCJIT) {
+    errs() << "error: Remote process execution does not work with the "
+              "interpreter.\n";
+    exit(1);
   }
 
   CodeGenOpt::Level OLvl = CodeGenOpt::Default;
@@ -511,46 +488,50 @@ int main(int argc, char **argv, char * const *envp) {
 
   // Load any additional modules specified on the command line.
   for (unsigned i = 0, e = ExtraModules.size(); i != e; ++i) {
-    Module *XMod = ParseIRFile(ExtraModules[i], Err, Context);
+    std::unique_ptr<Module> XMod = parseIRFile(ExtraModules[i], Err, Context);
     if (!XMod) {
       Err.print(argv[0], errs());
       return 1;
     }
     if (EnableCacheManager) {
-      if (UseMCJIT) {
-        std::string CacheName("file:");
-        CacheName.append(ExtraModules[i]);
-        XMod->setModuleIdentifier(CacheName);
-      }
-      // else, we already printed a warning above.
+      std::string CacheName("file:");
+      CacheName.append(ExtraModules[i]);
+      XMod->setModuleIdentifier(CacheName);
     }
-    EE->addModule(XMod);
+    EE->addModule(std::move(XMod));
   }
 
   for (unsigned i = 0, e = ExtraObjects.size(); i != e; ++i) {
-    ErrorOr<object::ObjectFile *> Obj =
+    ErrorOr<object::OwningBinary<object::ObjectFile>> Obj =
         object::ObjectFile::createObjectFile(ExtraObjects[i]);
     if (!Obj) {
       Err.print(argv[0], errs());
       return 1;
     }
-    EE->addObjectFile(std::unique_ptr<object::ObjectFile>(Obj.get()));
+    object::OwningBinary<object::ObjectFile> &O = Obj.get();
+    EE->addObjectFile(std::move(O));
   }
 
   for (unsigned i = 0, e = ExtraArchives.size(); i != e; ++i) {
-    ErrorOr<std::unique_ptr<MemoryBuffer>> ArBuf =
+    ErrorOr<std::unique_ptr<MemoryBuffer>> ArBufOrErr =
         MemoryBuffer::getFileOrSTDIN(ExtraArchives[i]);
-    if (!ArBuf) {
+    if (!ArBufOrErr) {
       Err.print(argv[0], errs());
       return 1;
     }
-    std::error_code EC;
-    object::Archive *Ar = new object::Archive(std::move(ArBuf.get()), EC);
-    if (EC || !Ar) {
-      Err.print(argv[0], errs());
+    std::unique_ptr<MemoryBuffer> &ArBuf = ArBufOrErr.get();
+
+    ErrorOr<std::unique_ptr<object::Archive>> ArOrErr =
+        object::Archive::create(ArBuf->getMemBufferRef());
+    if (std::error_code EC = ArOrErr.getError()) {
+      errs() << EC.message();
       return 1;
     }
-    EE->addArchive(Ar);
+    std::unique_ptr<object::Archive> &Ar = ArOrErr.get();
+
+    object::OwningBinary<object::Archive> OB(std::move(Ar), std::move(ArBuf));
+
+    EE->addArchive(std::move(OB));
   }
 
   // If the target is Cygwin/MingW and we are generating remote code, we
@@ -610,20 +591,12 @@ int main(int argc, char **argv, char * const *envp) {
                                                       NULL);
 
     // Run static constructors.
-    if (UseMCJIT && !ForceInterpreter) {
+    if (!ForceInterpreter) {
       // Give MCJIT a chance to apply relocations and set page permissions.
       EE->finalizeObject();
     }
     EE->runStaticConstructorsDestructors(false);
 
-    if (!UseMCJIT && NoLazyCompilation) {
-      for (Module::iterator I = Mod->begin(), E = Mod->end(); I != E; ++I) {
-        Function *Fn = &*I;
-        if (Fn != EntryFn && !Fn->isDeclaration())
-          EE->getPointerToFunction(Fn);
-      }
-    }
-
     // Trigger compilation separately so code regions that need to be
     // invalidated will be known.
     (void)EE->getPointerToFunction(EntryFn);
diff --git a/tools/llvm-ar/CMakeLists.txt b/tools/llvm-ar/CMakeLists.txt
index 5193def2aad5..3782c87e4d38 100644
--- a/tools/llvm-ar/CMakeLists.txt
+++ b/tools/llvm-ar/CMakeLists.txt
@@ -9,9 +9,6 @@ add_llvm_tool(llvm-ar
   llvm-ar.cpp
   )
 
-# FIXME: this is duplicated from the clang CMakeLists.txt
-# FIXME: bin/llvm-ranlib is not a valid build target with this setup (pr17024)
-
 if(UNIX)
   set(LLVM_LINK_OR_COPY create_symlink)
   set(llvm_ar_binary "llvm-ar${CMAKE_EXECUTABLE_SUFFIX}")
@@ -21,10 +18,12 @@ else()
 endif()
 
 set(llvm_ranlib "${LLVM_RUNTIME_OUTPUT_INTDIR}/llvm-ranlib${CMAKE_EXECUTABLE_SUFFIX}")
-add_custom_command(TARGET llvm-ar POST_BUILD
-    COMMAND ${CMAKE_COMMAND} -E ${LLVM_LINK_OR_COPY} "${llvm_ar_binary}" "${llvm_ranlib}")
 
-set_property(DIRECTORY APPEND
-  PROPERTY ADDITIONAL_MAKE_CLEAN_FILES ${llvm_ranlib})
+add_custom_command(OUTPUT ${llvm_ranlib}
+                   COMMAND ${CMAKE_COMMAND} -E ${LLVM_LINK_OR_COPY} "${llvm_ar_binary}" "${llvm_ranlib}"
+                   DEPENDS llvm-ar)
+
+add_custom_target(llvm-ranlib ALL DEPENDS ${llvm_ranlib})
+set_target_properties(llvm-ranlib PROPERTIES FOLDER Tools)
 
-# TODO: Support check-local.
+install(SCRIPT install_symlink.cmake -DCMAKE_INSTALL_PREFIX=\"${CMAKE_INSTALL_PREFIX}\")
diff --git a/tools/llvm-ar/install_symlink.cmake b/tools/llvm-ar/install_symlink.cmake
new file mode 100644
index 000000000000..e313897b8b3a
--- /dev/null
+++ b/tools/llvm-ar/install_symlink.cmake
@@ -0,0 +1,25 @@
+# We need to execute this script at installation time because the
+# DESTDIR environment variable may be unset at configuration time.
+# See PR8397.
+
+if(UNIX)
+  set(LINK_OR_COPY create_symlink)
+  set(DESTDIR $ENV{DESTDIR})
+else()
+  set(LINK_OR_COPY copy)
+endif()
+
+# CMAKE_EXECUTABLE_SUFFIX is undefined on cmake scripts. See PR9286.
+if( WIN32 )
+  set(EXECUTABLE_SUFFIX ".exe")
+else()
+  set(EXECUTABLE_SUFFIX "")
+endif()
+
+set(bindir "${DESTDIR}${CMAKE_INSTALL_PREFIX}/bin/")
+
+message("Creating llvm-ranlib")
+
+execute_process(
+  COMMAND "${CMAKE_COMMAND}" -E ${LINK_OR_COPY} "llvm-ar${EXECUTABLE_SUFFIX}" "llvm-ranlib${EXECUTABLE_SUFFIX}"
+  WORKING_DIRECTORY "${bindir}")
diff --git a/tools/llvm-ar/llvm-ar.cpp b/tools/llvm-ar/llvm-ar.cpp
index f638e55c5c71..f72762ac174a 100644
--- a/tools/llvm-ar/llvm-ar.cpp
+++ b/tools/llvm-ar/llvm-ar.cpp
@@ -12,6 +12,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/ADT/StringSwitch.h"
 #include "llvm/IR/LLVMContext.h"
 #include "llvm/IR/Module.h"
 #include "llvm/Object/Archive.h"
@@ -20,6 +21,7 @@
 #include "llvm/Support/Errc.h"
 #include "llvm/Support/FileSystem.h"
 #include "llvm/Support/Format.h"
+#include "llvm/Support/LineIterator.h"
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/PrettyStackTrace.h"
@@ -45,7 +47,7 @@ static StringRef ToolName;
 static const char *TemporaryOutput;
 static int TmpArchiveFD = -1;
 
-// fail - Show the error message and exit.
+// Show the error message and exit.
 LLVM_ATTRIBUTE_NORETURN static void fail(Twine Error) {
   outs() << ToolName << ": " << Error << ".\n";
   if (TmpArchiveFD != -1)
@@ -67,14 +69,16 @@ static void failIfError(std::error_code EC, Twine Context = "") {
 
 // llvm-ar/llvm-ranlib remaining positional arguments.
 static cl::list<std::string>
-RestOfArgs(cl::Positional, cl::OneOrMore,
-    cl::desc("[relpos] [count] <archive-file> [members]..."));
+    RestOfArgs(cl::Positional, cl::ZeroOrMore,
+               cl::desc("[relpos] [count] <archive-file> [members]..."));
+
+static cl::opt<bool> MRI("M", cl::desc(""));
 
 std::string Options;
 
-// MoreHelp - Provide additional help output explaining the operations and
-// modifiers of llvm-ar. This object instructs the CommandLine library
-// to print the text of the constructor when the --help option is given.
+// Provide additional help output explaining the operations and modifiers of
+// llvm-ar. This object instructs the CommandLine library to print the text of
+// the constructor when the --help option is given.
 static cl::extrahelp MoreHelp(
   "\nOPERATIONS:\n"
   "  d[NsS]       - delete file(s) from the archive\n"
@@ -132,9 +136,9 @@ static std::string ArchiveName;
 
 // This variable holds the list of member files to proecess, as given
 // on the command line.
-static std::vector<std::string> Members;
+static std::vector<StringRef> Members;
 
-// show_help - Show the error message, the help message and exit.
+// Show the error message, the help message and exit.
 LLVM_ATTRIBUTE_NORETURN static void
 show_help(const std::string &msg) {
   errs() << ToolName << ": " << msg << "\n\n";
@@ -142,8 +146,8 @@ show_help(const std::string &msg) {
   std::exit(1);
 }
 
-// getRelPos - Extract the member filename from the command line for
-// the [relpos] argument associated with a, b, and i modifiers
+// Extract the member filename from the command line for the [relpos] argument
+// associated with a, b, and i modifiers
 static void getRelPos() {
   if(RestOfArgs.size() == 0)
     show_help("Expected [relpos] for a, b, or i modifier");
@@ -158,7 +162,7 @@ static void getOptions() {
   RestOfArgs.erase(RestOfArgs.begin());
 }
 
-// getArchive - Get the archive file name from the command line
+// Get the archive file name from the command line
 static void getArchive() {
   if(RestOfArgs.size() == 0)
     show_help("An archive name must be specified");
@@ -166,17 +170,24 @@ static void getArchive() {
   RestOfArgs.erase(RestOfArgs.begin());
 }
 
-// getMembers - Copy over remaining items in RestOfArgs to our Members vector
-// This is just for clarity.
+// Copy over remaining items in RestOfArgs to our Members vector
 static void getMembers() {
-  if(RestOfArgs.size() > 0)
-    Members = std::vector<std::string>(RestOfArgs);
+  for (auto &Arg : RestOfArgs)
+    Members.push_back(Arg);
 }
 
-// parseCommandLine - Parse the command line options as presented and return the
-// operation specified. Process all modifiers and check to make sure that
-// constraints on modifier/operation pairs have not been violated.
+static void runMRIScript();
+
+// Parse the command line options as presented and return the operation
+// specified. Process all modifiers and check to make sure that constraints on
+// modifier/operation pairs have not been violated.
 static ArchiveOperation parseCommandLine() {
+  if (MRI) {
+    if (!RestOfArgs.empty())
+      fail("Cannot mix -M and other options");
+    runMRIScript();
+  }
+
   getOptions();
 
   // Keep track of number of operations. We can only specify one
@@ -279,8 +290,8 @@ static void doPrint(StringRef Name, object::Archive::child_iterator I) {
   outs().write(Data.data(), Data.size());
 }
 
-// putMode - utility function for printing out the file mode when the 't'
-// operation is in verbose mode.
+// Utility function for printing out the file mode when the 't' operation is in
+// verbose mode.
 static void printMode(unsigned mode) {
   if (mode & 004)
     outs() << "r";
@@ -401,21 +412,19 @@ class NewArchiveIterator {
 
   object::Archive::child_iterator OldI;
 
-  std::string NewFilename;
-  mutable int NewFD;
-  mutable sys::fs::file_status NewStatus;
+  StringRef NewFilename;
 
 public:
   NewArchiveIterator(object::Archive::child_iterator I, StringRef Name);
-  NewArchiveIterator(std::string *I, StringRef Name);
+  NewArchiveIterator(StringRef I, StringRef Name);
   NewArchiveIterator();
   bool isNewMember() const;
   StringRef getName() const;
 
   object::Archive::child_iterator getOld() const;
 
-  const char *getNew() const;
-  int getFD() const;
+  StringRef getNew() const;
+  int getFD(sys::fs::file_status &NewStatus) const;
   const sys::fs::file_status &getStatus() const;
 };
 }
@@ -426,8 +435,8 @@ NewArchiveIterator::NewArchiveIterator(object::Archive::child_iterator I,
                                        StringRef Name)
     : IsNewMember(false), Name(Name), OldI(I) {}
 
-NewArchiveIterator::NewArchiveIterator(std::string *NewFilename, StringRef Name)
-    : IsNewMember(true), Name(Name), NewFilename(*NewFilename), NewFD(-1) {}
+NewArchiveIterator::NewArchiveIterator(StringRef NewFilename, StringRef Name)
+    : IsNewMember(true), Name(Name), NewFilename(NewFilename) {}
 
 StringRef NewArchiveIterator::getName() const { return Name; }
 
@@ -438,15 +447,14 @@ object::Archive::child_iterator NewArchiveIterator::getOld() const {
   return OldI;
 }
 
-const char *NewArchiveIterator::getNew() const {
+StringRef NewArchiveIterator::getNew() const {
   assert(IsNewMember);
-  return NewFilename.c_str();
+  return NewFilename;
 }
 
-int NewArchiveIterator::getFD() const {
+int NewArchiveIterator::getFD(sys::fs::file_status &NewStatus) const {
   assert(IsNewMember);
-  if (NewFD != -1)
-    return NewFD;
+  int NewFD;
   failIfError(sys::fs::openFileForRead(NewFilename, NewFD), NewFilename);
   assert(NewFD != -1);
 
@@ -461,12 +469,6 @@ int NewArchiveIterator::getFD() const {
   return NewFD;
 }
 
-const sys::fs::file_status &NewArchiveIterator::getStatus() const {
-  assert(IsNewMember);
-  assert(NewFD != -1 && "Must call getFD first");
-  return NewStatus;
-}
-
 template <typename T>
 void addMember(std::vector<NewArchiveIterator> &Members, T I, StringRef Name,
                int Pos = -1) {
@@ -485,16 +487,17 @@ enum InsertAction {
   IA_MoveNewMember
 };
 
-static InsertAction
-computeInsertAction(ArchiveOperation Operation,
-                    object::Archive::child_iterator I, StringRef Name,
-                    std::vector<std::string>::iterator &Pos) {
+static InsertAction computeInsertAction(ArchiveOperation Operation,
+                                        object::Archive::child_iterator I,
+                                        StringRef Name,
+                                        std::vector<StringRef>::iterator &Pos) {
   if (Operation == QuickAppend || Members.empty())
     return IA_AddOldMember;
 
-  std::vector<std::string>::iterator MI = std::find_if(
-      Members.begin(), Members.end(),
-      [Name](StringRef Path) { return Name == sys::path::filename(Path); });
+  auto MI =
+      std::find_if(Members.begin(), Members.end(), [Name](StringRef Path) {
+        return Name == sys::path::filename(Path);
+      });
 
   if (MI == Members.end())
     return IA_AddOldMember;
@@ -542,11 +545,9 @@ computeNewArchiveMembers(ArchiveOperation Operation,
   int InsertPos = -1;
   StringRef PosName = sys::path::filename(RelPos);
   if (OldArchive) {
-    for (object::Archive::child_iterator I = OldArchive->child_begin(),
-                                         E = OldArchive->child_end();
-         I != E; ++I) {
+    for (auto &Child : OldArchive->children()) {
       int Pos = Ret.size();
-      ErrorOr<StringRef> NameOrErr = I->getName();
+      ErrorOr<StringRef> NameOrErr = Child.getName();
       failIfError(NameOrErr.getError());
       StringRef Name = NameOrErr.get();
       if (Name == PosName) {
@@ -557,22 +558,23 @@ computeNewArchiveMembers(ArchiveOperation Operation,
           InsertPos = Pos + 1;
       }
 
-      std::vector<std::string>::iterator MemberI = Members.end();
-      InsertAction Action = computeInsertAction(Operation, I, Name, MemberI);
+      std::vector<StringRef>::iterator MemberI = Members.end();
+      InsertAction Action =
+          computeInsertAction(Operation, Child, Name, MemberI);
       switch (Action) {
       case IA_AddOldMember:
-        addMember(Ret, I, Name);
+        addMember(Ret, Child, Name);
         break;
       case IA_AddNewMeber:
-        addMember(Ret, &*MemberI, Name);
+        addMember(Ret, *MemberI, Name);
         break;
       case IA_Delete:
         break;
       case IA_MoveOldMember:
-        addMember(Moved, I, Name);
+        addMember(Moved, Child, Name);
         break;
       case IA_MoveNewMember:
-        addMember(Moved, &*MemberI, Name);
+        addMember(Moved, *MemberI, Name);
         break;
       }
       if (MemberI != Members.end())
@@ -594,11 +596,10 @@ computeNewArchiveMembers(ArchiveOperation Operation,
 
   Ret.insert(Ret.begin() + InsertPos, Members.size(), NewArchiveIterator());
   int Pos = InsertPos;
-  for (std::vector<std::string>::iterator I = Members.begin(),
-         E = Members.end();
-       I != E; ++I, ++Pos) {
-    StringRef Name = sys::path::filename(*I);
-    addMember(Ret, &*I, Name, Pos);
+  for (auto &Member : Members) {
+    StringRef Name = sys::path::filename(Member);
+    addMember(Ret, Member, Name, Pos);
+    ++Pos;
   }
 
   return Ret;
@@ -684,10 +685,11 @@ static void writeStringTable(raw_fd_ostream &Out,
   Out.seek(Pos);
 }
 
-static void
-writeSymbolTable(raw_fd_ostream &Out, ArrayRef<NewArchiveIterator> Members,
-                 MutableArrayRef<std::unique_ptr<MemoryBuffer>> Buffers,
-                 std::vector<std::pair<unsigned, unsigned>> &MemberOffsetRefs) {
+// Returns the offset of the first reference to a member offset.
+static unsigned writeSymbolTable(raw_fd_ostream &Out,
+                                 ArrayRef<NewArchiveIterator> Members,
+                                 ArrayRef<MemoryBufferRef> Buffers,
+                                 std::vector<unsigned> &MemberOffsetRefs) {
   unsigned StartOffset = 0;
   unsigned MemberNum = 0;
   std::string NameBuf;
@@ -697,13 +699,13 @@ writeSymbolTable(raw_fd_ostream &Out, ArrayRef<NewArchiveIterator> Members,
   for (ArrayRef<NewArchiveIterator>::iterator I = Members.begin(),
                                               E = Members.end();
        I != E; ++I, ++MemberNum) {
-    std::unique_ptr<MemoryBuffer> &MemberBuffer = Buffers[MemberNum];
-    ErrorOr<object::SymbolicFile *> ObjOrErr =
+    MemoryBufferRef MemberBuffer = Buffers[MemberNum];
+    ErrorOr<std::unique_ptr<object::SymbolicFile>> ObjOrErr =
         object::SymbolicFile::createSymbolicFile(
             MemberBuffer, sys::fs::file_magic::unknown, &Context);
     if (!ObjOrErr)
       continue;  // FIXME: check only for "not an object file" errors.
-    std::unique_ptr<object::SymbolicFile> Obj(ObjOrErr.get());
+    object::SymbolicFile &Obj = *ObjOrErr.get();
 
     if (!StartOffset) {
       printMemberHeader(Out, "", sys::TimeValue::now(), 0, 0, 0, 0);
@@ -711,7 +713,7 @@ writeSymbolTable(raw_fd_ostream &Out, ArrayRef<NewArchiveIterator> Members,
       print32BE(Out, 0);
     }
 
-    for (const object::BasicSymbolRef &S : Obj->symbols()) {
+    for (const object::BasicSymbolRef &S : Obj.symbols()) {
       uint32_t Symflags = S.getFlags();
       if (Symflags & object::SymbolRef::SF_FormatSpecific)
         continue;
@@ -722,15 +724,14 @@ writeSymbolTable(raw_fd_ostream &Out, ArrayRef<NewArchiveIterator> Members,
       failIfError(S.printName(NameOS));
       NameOS << '\0';
       ++NumSyms;
-      MemberOffsetRefs.push_back(std::make_pair(Out.tell(), MemberNum));
+      MemberOffsetRefs.push_back(MemberNum);
       print32BE(Out, 0);
     }
-    MemberBuffer.reset(Obj->releaseBuffer());
   }
   Out << NameOS.str();
 
   if (StartOffset == 0)
-    return;
+    return 0;
 
   if (Out.tell() % 2)
     Out << '\0';
@@ -741,10 +742,12 @@ writeSymbolTable(raw_fd_ostream &Out, ArrayRef<NewArchiveIterator> Members,
   Out.seek(StartOffset);
   print32BE(Out, NumSyms);
   Out.seek(Pos);
+  return StartOffset + 4;
 }
 
-static void performWriteOperation(ArchiveOperation Operation,
-                                  object::Archive *OldArchive) {
+static void
+performWriteOperation(ArchiveOperation Operation, object::Archive *OldArchive,
+                      std::vector<NewArchiveIterator> &NewMembers) {
   SmallString<128> TmpArchive;
   failIfError(sys::fs::createUniqueFile(ArchiveName + ".temp-archive-%%%%%%%.a",
                                         TmpArchiveFD, TmpArchive));
@@ -754,65 +757,63 @@ static void performWriteOperation(ArchiveOperation Operation,
   raw_fd_ostream &Out = Output.os();
   Out << "!<arch>\n";
 
-  std::vector<NewArchiveIterator> NewMembers =
-      computeNewArchiveMembers(Operation, OldArchive);
-
-  std::vector<std::pair<unsigned, unsigned> > MemberOffsetRefs;
+  std::vector<unsigned> MemberOffsetRefs;
 
-  std::vector<std::unique_ptr<MemoryBuffer>> MemberBuffers;
-  MemberBuffers.resize(NewMembers.size());
+  std::vector<std::unique_ptr<MemoryBuffer>> Buffers;
+  std::vector<MemoryBufferRef> Members;
+  std::vector<sys::fs::file_status> NewMemberStatus;
 
   for (unsigned I = 0, N = NewMembers.size(); I < N; ++I) {
-    std::unique_ptr<MemoryBuffer> MemberBuffer;
     NewArchiveIterator &Member = NewMembers[I];
+    MemoryBufferRef MemberRef;
 
     if (Member.isNewMember()) {
-      const char *Filename = Member.getNew();
-      int FD = Member.getFD();
-      const sys::fs::file_status &Status = Member.getStatus();
+      StringRef Filename = Member.getNew();
+      NewMemberStatus.resize(NewMemberStatus.size() + 1);
+      sys::fs::file_status &Status = NewMemberStatus.back();
+      int FD = Member.getFD(Status);
       ErrorOr<std::unique_ptr<MemoryBuffer>> MemberBufferOrErr =
           MemoryBuffer::getOpenFile(FD, Filename, Status.getSize(), false);
       failIfError(MemberBufferOrErr.getError(), Filename);
-      MemberBuffer = std::move(MemberBufferOrErr.get());
+      if (close(FD) != 0)
+        fail("Could not close file");
+      Buffers.push_back(std::move(MemberBufferOrErr.get()));
+      MemberRef = Buffers.back()->getMemBufferRef();
     } else {
       object::Archive::child_iterator OldMember = Member.getOld();
-      ErrorOr<std::unique_ptr<MemoryBuffer>> MemberBufferOrErr =
-          OldMember->getMemoryBuffer();
+      ErrorOr<MemoryBufferRef> MemberBufferOrErr =
+          OldMember->getMemoryBufferRef();
       failIfError(MemberBufferOrErr.getError());
-      MemberBuffer = std::move(MemberBufferOrErr.get());
+      MemberRef = MemberBufferOrErr.get();
     }
-    MemberBuffers[I].reset(MemberBuffer.release());
+    Members.push_back(MemberRef);
   }
 
+  unsigned MemberReferenceOffset = 0;
   if (Symtab) {
-    writeSymbolTable(Out, NewMembers, MemberBuffers, MemberOffsetRefs);
+    MemberReferenceOffset =
+        writeSymbolTable(Out, NewMembers, Members, MemberOffsetRefs);
   }
 
   std::vector<unsigned> StringMapIndexes;
   writeStringTable(Out, NewMembers, StringMapIndexes);
 
-  std::vector<std::pair<unsigned, unsigned> >::iterator MemberRefsI =
-      MemberOffsetRefs.begin();
-
   unsigned MemberNum = 0;
   unsigned LongNameMemberNum = 0;
+  unsigned NewMemberNum = 0;
+  std::vector<unsigned> MemberOffset;
   for (std::vector<NewArchiveIterator>::iterator I = NewMembers.begin(),
                                                  E = NewMembers.end();
        I != E; ++I, ++MemberNum) {
 
     unsigned Pos = Out.tell();
-    while (MemberRefsI != MemberOffsetRefs.end() &&
-           MemberRefsI->second == MemberNum) {
-      Out.seek(MemberRefsI->first);
-      print32BE(Out, Pos);
-      ++MemberRefsI;
-    }
-    Out.seek(Pos);
+    MemberOffset.push_back(Pos);
 
-    const MemoryBuffer *File = MemberBuffers[MemberNum].get();
+    MemoryBufferRef File = Members[MemberNum];
     if (I->isNewMember()) {
-      const char *FileName = I->getNew();
-      const sys::fs::file_status &Status = I->getStatus();
+      StringRef FileName = I->getNew();
+      const sys::fs::file_status &Status = NewMemberStatus[NewMemberNum];
+      NewMemberNum++;
 
       StringRef Name = sys::path::filename(FileName);
       if (Name.size() < 16)
@@ -839,18 +840,36 @@ static void performWriteOperation(ArchiveOperation Operation,
                           OldMember->getSize());
     }
 
-    Out << File->getBuffer();
+    Out << File.getBuffer();
 
     if (Out.tell() % 2)
       Out << '\n';
   }
 
+  if (MemberReferenceOffset) {
+    Out.seek(MemberReferenceOffset);
+    for (unsigned MemberNum : MemberOffsetRefs)
+      print32BE(Out, MemberOffset[MemberNum]);
+  }
+
   Output.keep();
   Out.close();
   sys::fs::rename(TemporaryOutput, ArchiveName);
   TemporaryOutput = nullptr;
 }
 
+static void
+performWriteOperation(ArchiveOperation Operation, object::Archive *OldArchive,
+                      std::vector<NewArchiveIterator> *NewMembersP) {
+  if (NewMembersP) {
+    performWriteOperation(Operation, OldArchive, *NewMembersP);
+    return;
+  }
+  std::vector<NewArchiveIterator> NewMembers =
+      computeNewArchiveMembers(Operation, OldArchive);
+  performWriteOperation(Operation, OldArchive, NewMembers);
+}
+
 static void createSymbolTable(object::Archive *OldArchive) {
   // When an archive is created or modified, if the s option is given, the
   // resulting archive will have a current symbol table. If the S option
@@ -861,11 +880,12 @@ static void createSymbolTable(object::Archive *OldArchive) {
   if (OldArchive->hasSymbolTable())
     return;
 
-  performWriteOperation(CreateSymTab, OldArchive);
+  performWriteOperation(CreateSymTab, OldArchive, nullptr);
 }
 
 static void performOperation(ArchiveOperation Operation,
-                             object::Archive *OldArchive) {
+                             object::Archive *OldArchive,
+                             std::vector<NewArchiveIterator> *NewMembers) {
   switch (Operation) {
   case Print:
   case DisplayTable:
@@ -877,7 +897,7 @@ static void performOperation(ArchiveOperation Operation,
   case Move:
   case QuickAppend:
   case ReplaceOrInsert:
-    performWriteOperation(Operation, OldArchive);
+    performWriteOperation(Operation, OldArchive, NewMembers);
     return;
   case CreateSymTab:
     createSymbolTable(OldArchive);
@@ -886,53 +906,8 @@ static void performOperation(ArchiveOperation Operation,
   llvm_unreachable("Unknown operation.");
 }
 
-static int ar_main(char **argv);
-static int ranlib_main();
-
-// main - main program for llvm-ar .. see comments in the code
-int main(int argc, char **argv) {
-  ToolName = argv[0];
-  // Print a stack trace if we signal out.
-  sys::PrintStackTraceOnErrorSignal();
-  PrettyStackTraceProgram X(argc, argv);
-  llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.
-
-  // Have the command line options parsed and handle things
-  // like --help and --version.
-  cl::ParseCommandLineOptions(argc, argv,
-    "LLVM Archiver (llvm-ar)\n\n"
-    "  This program archives bitcode files into single libraries\n"
-  );
-
-  llvm::InitializeAllTargetInfos();
-  llvm::InitializeAllTargetMCs();
-  llvm::InitializeAllAsmParsers();
-
-  StringRef Stem = sys::path::stem(ToolName);
-  if (Stem.find("ar") != StringRef::npos)
-    return ar_main(argv);
-  if (Stem.find("ranlib") != StringRef::npos)
-    return ranlib_main();
-  fail("Not ranlib or ar!");
-}
-
-static int performOperation(ArchiveOperation Operation);
-
-int ranlib_main() {
-  if (RestOfArgs.size() != 1)
-    fail(ToolName + "takes just one archive as argument");
-  ArchiveName = RestOfArgs[0];
-  return performOperation(CreateSymTab);
-}
-
-int ar_main(char **argv) {
-  // Do our own parsing of the command line because the CommandLine utility
-  // can't handle the grouped positional parameters without a dash.
-  ArchiveOperation Operation = parseCommandLine();
-  return performOperation(Operation);
-}
-
-static int performOperation(ArchiveOperation Operation) {
+static int performOperation(ArchiveOperation Operation,
+                            std::vector<NewArchiveIterator> *NewMembers) {
   // Create or open the archive object.
   ErrorOr<std::unique_ptr<MemoryBuffer>> Buf =
       MemoryBuffer::getFile(ArchiveName, -1, false);
@@ -944,14 +919,14 @@ static int performOperation(ArchiveOperation Operation) {
   }
 
   if (!EC) {
-    object::Archive Archive(std::move(Buf.get()), EC);
+    object::Archive Archive(Buf.get()->getMemBufferRef(), EC);
 
     if (EC) {
       errs() << ToolName << ": error loading '" << ArchiveName
              << "': " << EC.message() << "!\n";
       return 1;
     }
-    performOperation(Operation, &Archive);
+    performOperation(Operation, &Archive, NewMembers);
     return 0;
   }
 
@@ -966,6 +941,116 @@ static int performOperation(ArchiveOperation Operation) {
     }
   }
 
-  performOperation(Operation, nullptr);
+  performOperation(Operation, nullptr, NewMembers);
   return 0;
 }
+
+static void runMRIScript() {
+  enum class MRICommand { AddLib, AddMod, Create, Save, End, Invalid };
+
+  ErrorOr<std::unique_ptr<MemoryBuffer>> Buf = MemoryBuffer::getSTDIN();
+  failIfError(Buf.getError());
+  const MemoryBuffer &Ref = *Buf.get();
+  bool Saved = false;
+  std::vector<NewArchiveIterator> NewMembers;
+  std::vector<std::unique_ptr<MemoryBuffer>> ArchiveBuffers;
+  std::vector<std::unique_ptr<object::Archive>> Archives;
+
+  for (line_iterator I(Ref, /*SkipBlanks*/ true, ';'), E; I != E; ++I) {
+    StringRef Line = *I;
+    StringRef CommandStr, Rest;
+    std::tie(CommandStr, Rest) = Line.split(' ');
+    Rest = Rest.trim();
+    if (!Rest.empty() && Rest.front() == '"' && Rest.back() == '"')
+      Rest = Rest.drop_front().drop_back();
+    auto Command = StringSwitch<MRICommand>(CommandStr.lower())
+                       .Case("addlib", MRICommand::AddLib)
+                       .Case("addmod", MRICommand::AddMod)
+                       .Case("create", MRICommand::Create)
+                       .Case("save", MRICommand::Save)
+                       .Case("end", MRICommand::End)
+                       .Default(MRICommand::Invalid);
+
+    switch (Command) {
+    case MRICommand::AddLib: {
+      auto BufOrErr = MemoryBuffer::getFile(Rest, -1, false);
+      failIfError(BufOrErr.getError(), "Could not open library");
+      ArchiveBuffers.push_back(std::move(*BufOrErr));
+      auto LibOrErr =
+          object::Archive::create(ArchiveBuffers.back()->getMemBufferRef());
+      failIfError(LibOrErr.getError(), "Could not parse library");
+      Archives.push_back(std::move(*LibOrErr));
+      object::Archive &Lib = *Archives.back();
+      for (auto &Member : Lib.children()) {
+        ErrorOr<StringRef> NameOrErr = Member.getName();
+        failIfError(NameOrErr.getError());
+        addMember(NewMembers, Member, *NameOrErr);
+      }
+      break;
+    }
+    case MRICommand::AddMod:
+      addMember(NewMembers, Rest, sys::path::filename(Rest));
+      break;
+    case MRICommand::Create:
+      Create = true;
+      if (!ArchiveName.empty())
+        fail("Editing multiple archives not supported");
+      if (Saved)
+        fail("File already saved");
+      ArchiveName = Rest;
+      break;
+    case MRICommand::Save:
+      Saved = true;
+      break;
+    case MRICommand::End:
+      break;
+    case MRICommand::Invalid:
+      fail("Unknown command: " + CommandStr);
+    }
+  }
+
+  // Nothing to do if not saved.
+  if (Saved)
+    performOperation(ReplaceOrInsert, &NewMembers);
+  exit(0);
+}
+
+static int ar_main() {
+  // Do our own parsing of the command line because the CommandLine utility
+  // can't handle the grouped positional parameters without a dash.
+  ArchiveOperation Operation = parseCommandLine();
+  return performOperation(Operation, nullptr);
+}
+
+static int ranlib_main() {
+  if (RestOfArgs.size() != 1)
+    fail(ToolName + "takes just one archive as argument");
+  ArchiveName = RestOfArgs[0];
+  return performOperation(CreateSymTab, nullptr);
+}
+
+int main(int argc, char **argv) {
+  ToolName = argv[0];
+  // Print a stack trace if we signal out.
+  sys::PrintStackTraceOnErrorSignal();
+  PrettyStackTraceProgram X(argc, argv);
+  llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.
+
+  // Have the command line options parsed and handle things
+  // like --help and --version.
+  cl::ParseCommandLineOptions(argc, argv,
+    "LLVM Archiver (llvm-ar)\n\n"
+    "  This program archives bitcode files into single libraries\n"
+  );
+
+  llvm::InitializeAllTargetInfos();
+  llvm::InitializeAllTargetMCs();
+  llvm::InitializeAllAsmParsers();
+
+  StringRef Stem = sys::path::stem(ToolName);
+  if (Stem.find("ar") != StringRef::npos)
+    return ar_main();
+  if (Stem.find("ranlib") != StringRef::npos)
+    return ranlib_main();
+  fail("Not ranlib or ar!");
+}
diff --git a/tools/llvm-as/llvm-as.cpp b/tools/llvm-as/llvm-as.cpp
index 007241c5068d..5ccf505923f2 100644
--- a/tools/llvm-as/llvm-as.cpp
+++ b/tools/llvm-as/llvm-as.cpp
@@ -69,11 +69,11 @@ static void WriteOutputFile(const Module *M) {
     }
   }
 
-  std::string ErrorInfo;
+  std::error_code EC;
   std::unique_ptr<tool_output_file> Out(
-      new tool_output_file(OutputFilename.c_str(), ErrorInfo, sys::fs::F_None));
-  if (!ErrorInfo.empty()) {
-    errs() << ErrorInfo << '\n';
+      new tool_output_file(OutputFilename, EC, sys::fs::F_None));
+  if (EC) {
+    errs() << EC.message() << '\n';
     exit(1);
   }
 
@@ -94,7 +94,7 @@ int main(int argc, char **argv) {
 
   // Parse the file now...
   SMDiagnostic Err;
-  std::unique_ptr<Module> M(ParseAssemblyFile(InputFilename, Err, Context));
+  std::unique_ptr<Module> M = parseAssemblyFile(InputFilename, Err, Context);
   if (!M.get()) {
     Err.print(argv[0], errs());
     return 1;
diff --git a/tools/llvm-bcanalyzer/llvm-bcanalyzer.cpp b/tools/llvm-bcanalyzer/llvm-bcanalyzer.cpp
index 15567cf31239..396e03036989 100644
--- a/tools/llvm-bcanalyzer/llvm-bcanalyzer.cpp
+++ b/tools/llvm-bcanalyzer/llvm-bcanalyzer.cpp
@@ -28,6 +28,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Bitcode/BitstreamReader.h"
+#include "llvm/ADT/Optional.h"
 #include "llvm/Bitcode/LLVMBitCodes.h"
 #include "llvm/Bitcode/ReaderWriter.h"
 #include "llvm/IR/Verifier.h"
@@ -61,6 +62,10 @@ NonSymbolic("non-symbolic",
             cl::desc("Emit numeric info in dump even if"
                      " symbolic info is available"));
 
+static cl::opt<std::string>
+  BlockInfoFilename("block-info",
+                    cl::desc("Use the BLOCK_INFO from the given file"));
+
 namespace {
 
 /// CurStreamTypeType - A type for CurStreamType
@@ -71,15 +76,11 @@ enum CurStreamTypeType {
 
 }
 
-/// CurStreamType - If we can sniff the flavor of this stream, we can produce
-/// better dump info.
-static CurStreamTypeType CurStreamType;
-
-
 /// GetBlockName - Return a symbolic block name if known, otherwise return
 /// null.
 static const char *GetBlockName(unsigned BlockID,
-                                const BitstreamReader &StreamFile) {
+                                const BitstreamReader &StreamFile,
+                                CurStreamTypeType CurStreamType) {
   // Standard blocks for all bitcode files.
   if (BlockID < bitc::FIRST_APPLICATION_BLOCKID) {
     if (BlockID == bitc::BLOCKINFO_BLOCK_ID)
@@ -115,7 +116,8 @@ static const char *GetBlockName(unsigned BlockID,
 /// GetCodeName - Return a symbolic code name if known, otherwise return
 /// null.
 static const char *GetCodeName(unsigned CodeID, unsigned BlockID,
-                               const BitstreamReader &StreamFile) {
+                               const BitstreamReader &StreamFile,
+                               CurStreamTypeType CurStreamType) {
   // Standard blocks for all bitcode files.
   if (BlockID < bitc::FIRST_APPLICATION_BLOCKID) {
     if (BlockID == bitc::BLOCKINFO_BLOCK_ID) {
@@ -265,13 +267,16 @@ static const char *GetCodeName(unsigned CodeID, unsigned BlockID,
     case bitc::METADATA_NAME:        return "METADATA_NAME";
     case bitc::METADATA_KIND:        return "METADATA_KIND";
     case bitc::METADATA_NODE:        return "METADATA_NODE";
-    case bitc::METADATA_FN_NODE:     return "METADATA_FN_NODE";
+    case bitc::METADATA_VALUE:       return "METADATA_VALUE";
+    case bitc::METADATA_OLD_NODE:    return "METADATA_OLD_NODE";
+    case bitc::METADATA_OLD_FN_NODE: return "METADATA_OLD_FN_NODE";
     case bitc::METADATA_NAMED_NODE:  return "METADATA_NAMED_NODE";
     }
   case bitc::USELIST_BLOCK_ID:
     switch(CodeID) {
     default:return nullptr;
-    case bitc::USELIST_CODE_ENTRY:   return "USELIST_CODE_ENTRY";
+    case bitc::USELIST_CODE_DEFAULT: return "USELIST_CODE_DEFAULT";
+    case bitc::USELIST_CODE_BB:      return "USELIST_CODE_BB";
     }
   }
 }
@@ -315,14 +320,14 @@ static std::map<unsigned, PerBlockIDStats> BlockIDStats;
 
 /// Error - All bitcode analysis errors go through this function, making this a
 /// good place to breakpoint if debugging.
-static bool Error(const std::string &Err) {
+static bool Error(const Twine &Err) {
   errs() << Err << "\n";
   return true;
 }
 
 /// ParseBlock - Read a block, updating statistics, etc.
 static bool ParseBlock(BitstreamCursor &Stream, unsigned BlockID,
-                       unsigned IndentLevel) {
+                       unsigned IndentLevel, CurStreamTypeType CurStreamType) {
   std::string Indent(IndentLevel*2, ' ');
   uint64_t BlockBitStart = Stream.GetCurrentBitNo();
 
@@ -348,7 +353,8 @@ static bool ParseBlock(BitstreamCursor &Stream, unsigned BlockID,
   const char *BlockName = nullptr;
   if (Dump) {
     outs() << Indent << "<";
-    if ((BlockName = GetBlockName(BlockID, *Stream.getBitStreamReader())))
+    if ((BlockName = GetBlockName(BlockID, *Stream.getBitStreamReader(),
+                                  CurStreamType)))
       outs() << BlockName;
     else
       outs() << "UnknownBlock" << BlockID;
@@ -390,7 +396,7 @@ static bool ParseBlock(BitstreamCursor &Stream, unsigned BlockID,
         
     case BitstreamEntry::SubBlock: {
       uint64_t SubBlockBitStart = Stream.GetCurrentBitNo();
-      if (ParseBlock(Stream, Entry.ID, IndentLevel+1))
+      if (ParseBlock(Stream, Entry.ID, IndentLevel+1, CurStreamType))
         return true;
       ++BlockStats.NumSubBlocks;
       uint64_t SubBlockBitEnd = Stream.GetCurrentBitNo();
@@ -431,12 +437,14 @@ static bool ParseBlock(BitstreamCursor &Stream, unsigned BlockID,
     if (Dump) {
       outs() << Indent << "  <";
       if (const char *CodeName =
-            GetCodeName(Code, BlockID, *Stream.getBitStreamReader()))
+            GetCodeName(Code, BlockID, *Stream.getBitStreamReader(),
+                        CurStreamType))
         outs() << CodeName;
       else
         outs() << "UnknownCode" << Code;
       if (NonSymbolic &&
-          GetCodeName(Code, BlockID, *Stream.getBitStreamReader()))
+          GetCodeName(Code, BlockID, *Stream.getBitStreamReader(),
+                      CurStreamType))
         outs() << " codeid=" << Code;
       if (Entry.ID != bitc::UNABBREV_RECORD)
         outs() << " abbrevid=" << Entry.ID;
@@ -474,21 +482,23 @@ static void PrintSize(uint64_t Bits) {
                    (double)Bits/8, (unsigned long)(Bits/32));
 }
 
-
-/// AnalyzeBitcode - Analyze the bitcode file specified by InputFilename.
-static int AnalyzeBitcode() {
+static bool openBitcodeFile(StringRef Path,
+                            std::unique_ptr<MemoryBuffer> &MemBuf,
+                            BitstreamReader &StreamFile,
+                            BitstreamCursor &Stream,
+                            CurStreamTypeType &CurStreamType) {
   // Read the input file.
   ErrorOr<std::unique_ptr<MemoryBuffer>> MemBufOrErr =
-      MemoryBuffer::getFileOrSTDIN(InputFilename);
+      MemoryBuffer::getFileOrSTDIN(Path);
   if (std::error_code EC = MemBufOrErr.getError())
-    return Error("Error reading '" + InputFilename + "': " + EC.message());
-  std::unique_ptr<MemoryBuffer> MemBuf = std::move(MemBufOrErr.get());
+    return Error(Twine("Error reading '") + Path + "': " + EC.message());
+  MemBuf = std::move(MemBufOrErr.get());
 
   if (MemBuf->getBufferSize() & 3)
     return Error("Bitcode stream should be a multiple of 4 bytes in length");
 
   const unsigned char *BufPtr = (const unsigned char *)MemBuf->getBufferStart();
-  const unsigned char *EndBufPtr = BufPtr+MemBuf->getBufferSize();
+  const unsigned char *EndBufPtr = BufPtr + MemBuf->getBufferSize();
 
   // If we have a wrapper header, parse it and ignore the non-bc file contents.
   // The magic number is 0x0B17C0DE stored in little endian.
@@ -496,8 +506,8 @@ static int AnalyzeBitcode() {
     if (SkipBitcodeWrapperHeader(BufPtr, EndBufPtr, true))
       return Error("Invalid bitcode wrapper header");
 
-  BitstreamReader StreamFile(BufPtr, EndBufPtr);
-  BitstreamCursor Stream(StreamFile);
+  StreamFile = BitstreamReader(BufPtr, EndBufPtr);
+  Stream = BitstreamCursor(StreamFile);
   StreamFile.CollectBlockInfoNames();
 
   // Read the stream signature.
@@ -516,6 +526,48 @@ static int AnalyzeBitcode() {
       Signature[4] == 0xE && Signature[5] == 0xD)
     CurStreamType = LLVMIRBitstream;
 
+  return false;
+}
+
+/// AnalyzeBitcode - Analyze the bitcode file specified by InputFilename.
+static int AnalyzeBitcode() {
+  std::unique_ptr<MemoryBuffer> StreamBuffer;
+  BitstreamReader StreamFile;
+  BitstreamCursor Stream;
+  CurStreamTypeType CurStreamType;
+  if (openBitcodeFile(InputFilename, StreamBuffer, StreamFile, Stream,
+                      CurStreamType))
+    return true;
+
+  // Read block info from BlockInfoFilename, if specified.
+  // The block info must be a top-level block.
+  if (!BlockInfoFilename.empty()) {
+    std::unique_ptr<MemoryBuffer> BlockInfoBuffer;
+    BitstreamReader BlockInfoFile;
+    BitstreamCursor BlockInfoCursor;
+    CurStreamTypeType BlockInfoStreamType;
+    if (openBitcodeFile(BlockInfoFilename, BlockInfoBuffer, BlockInfoFile,
+                        BlockInfoCursor, BlockInfoStreamType))
+      return true;
+
+    while (!BlockInfoCursor.AtEndOfStream()) {
+      unsigned Code = BlockInfoCursor.ReadCode();
+      if (Code != bitc::ENTER_SUBBLOCK)
+        return Error("Invalid record at top-level in block info file");
+
+      unsigned BlockID = BlockInfoCursor.ReadSubBlockID();
+      if (BlockID == bitc::BLOCKINFO_BLOCK_ID) {
+        if (BlockInfoCursor.ReadBlockInfoBlock())
+          return Error("Malformed BlockInfoBlock in block info file");
+        break;
+      }
+
+      BlockInfoCursor.SkipBlock();
+    }
+
+    StreamFile.takeBlockInfo(std::move(BlockInfoFile));
+  }
+
   unsigned NumTopBlocks = 0;
 
   // Parse the top-level structure.  We only allow blocks at the top-level.
@@ -526,14 +578,14 @@ static int AnalyzeBitcode() {
 
     unsigned BlockID = Stream.ReadSubBlockID();
 
-    if (ParseBlock(Stream, BlockID, 0))
+    if (ParseBlock(Stream, BlockID, 0, CurStreamType))
       return true;
     ++NumTopBlocks;
   }
 
   if (Dump) outs() << "\n\n";
 
-  uint64_t BufferSizeBits = (EndBufPtr-BufPtr)*CHAR_BIT;
+  uint64_t BufferSizeBits = StreamFile.getBitcodeBytes().getExtent() * CHAR_BIT;
   // Print a summary of the read file.
   outs() << "Summary of " << InputFilename << ":\n";
   outs() << "         Total size: ";
@@ -552,7 +604,8 @@ static int AnalyzeBitcode() {
   for (std::map<unsigned, PerBlockIDStats>::iterator I = BlockIDStats.begin(),
        E = BlockIDStats.end(); I != E; ++I) {
     outs() << "  Block ID #" << I->first;
-    if (const char *BlockName = GetBlockName(I->first, StreamFile))
+    if (const char *BlockName = GetBlockName(I->first, StreamFile,
+                                             CurStreamType))
       outs() << " (" << BlockName << ")";
     outs() << ":\n";
 
@@ -610,7 +663,8 @@ static int AnalyzeBitcode() {
           outs() << "         ";
 
         if (const char *CodeName =
-              GetCodeName(FreqPairs[i].second, I->first, StreamFile))
+              GetCodeName(FreqPairs[i].second, I->first, StreamFile,
+                          CurStreamType))
           outs() << CodeName << "\n";
         else
           outs() << "UnknownCode" << FreqPairs[i].second << "\n";
diff --git a/tools/llvm-c-test/CMakeLists.txt b/tools/llvm-c-test/CMakeLists.txt
index 34fea3d69c16..baf970a02781 100644
--- a/tools/llvm-c-test/CMakeLists.txt
+++ b/tools/llvm-c-test/CMakeLists.txt
@@ -7,6 +7,29 @@ set(LLVM_LINK_COMPONENTS
   Target
   )
 
+# We should only have llvm-c-test use libLLVM if libLLVM is built with the
+# default list of components. Using libLLVM with custom components can result in
+# build failures.
+
+set (USE_LLVM_DYLIB FALSE)
+
+if (TARGET LLVM)
+  set (USE_LLVM_DYLIB TRUE)
+  if (DEFINED LLVM_DYLIB_COMPONENTS)
+    foreach(c in ${LLVM_LINK_COMPONENTS})
+      list(FIND LLVM_DYLIB_COMPONENTS ${c} C_IDX)
+      if (C_IDX EQUAL -1)
+        set(USE_LLVM_DYLIB FALSE)
+        break()
+      endif()
+    endforeach()
+  endif()
+endif()
+
+if(USE_LLVM_DYLIB)
+  set(LLVM_LINK_COMPONENTS)
+endif()
+
 if (LLVM_COMPILER_IS_GCC_COMPATIBLE)
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu99 -Wstrict-prototypes")
 endif ()
@@ -21,3 +44,7 @@ add_llvm_tool(llvm-c-test
   object.c
   targets.c
   )
+
+if(USE_LLVM_DYLIB)
+  target_link_libraries(llvm-c-test LLVM)
+endif()
diff --git a/tools/llvm-c-test/disassemble.c b/tools/llvm-c-test/disassemble.c
index eb40bf3d4461..05a9218d014a 100644
--- a/tools/llvm-c-test/disassemble.c
+++ b/tools/llvm-c-test/disassemble.c
@@ -18,6 +18,7 @@
 #include "llvm-c/Target.h"
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 
 static void pprint(int pos, unsigned char *buf, int len, const char *disasm) {
   int i;
@@ -33,13 +34,15 @@ static void pprint(int pos, unsigned char *buf, int len, const char *disasm) {
   printf("   %s\n", disasm);
 }
 
-static void do_disassemble(const char *triple, unsigned char *buf, int siz) {
-  LLVMDisasmContextRef D = LLVMCreateDisasm(triple, NULL, 0, NULL, NULL);
+static void do_disassemble(const char *triple, const char *features,
+                           unsigned char *buf, int siz) {
+  LLVMDisasmContextRef D = LLVMCreateDisasmCPUFeatures(triple, "", features,
+                                                       NULL, 0, NULL, NULL);
   char outline[1024];
   int pos;
 
   if (!D) {
-    printf("ERROR: Couldn't create disassebler for triple %s\n", triple);
+    printf("ERROR: Couldn't create disassembler for triple %s\n", triple);
     return;
   }
 
@@ -62,19 +65,22 @@ static void do_disassemble(const char *triple, unsigned char *buf, int siz) {
 static void handle_line(char **tokens, int ntokens) {
   unsigned char disbuf[128];
   size_t disbuflen = 0;
-  char *triple = tokens[0];
+  const char *triple = tokens[0];
+  const char *features = tokens[1];
   int i;
 
-  printf("triple: %s\n", triple);
+  printf("triple: %s, features: %s\n", triple, features);
+  if (!strcmp(features, "NULL"))
+    features = "";
 
-  for (i = 1; i < ntokens; i++) {
+  for (i = 2; i < ntokens; i++) {
     disbuf[disbuflen++] = strtol(tokens[i], NULL, 16);
     if (disbuflen >= sizeof(disbuf)) {
       fprintf(stderr, "Warning: Too long line, truncating\n");
       break;
     }
   }
-  do_disassemble(triple, disbuf, disbuflen);
+  do_disassemble(triple, features, disbuf, disbuflen);
 }
 
 int disassemble(void) {
diff --git a/tools/llvm-config/BuildVariables.inc.in b/tools/llvm-config/BuildVariables.inc.in
index 2ec019ba622f..3f51f491a7a4 100644
--- a/tools/llvm-config/BuildVariables.inc.in
+++ b/tools/llvm-config/BuildVariables.inc.in
@@ -23,5 +23,6 @@
 #define LLVM_LDFLAGS "@LLVM_LDFLAGS@"
 #define LLVM_CXXFLAGS "@LLVM_CXXFLAGS@"
 #define LLVM_BUILDMODE "@LLVM_BUILDMODE@"
+#define LLVM_LIBDIR_SUFFIX "@LLVM_LIBDIR_SUFFIX@"
 #define LLVM_TARGETS_BUILT "@LLVM_TARGETS_BUILT@"
 #define LLVM_SYSTEM_LIBS "@LLVM_SYSTEM_LIBS@"
diff --git a/tools/llvm-config/CMakeLists.txt b/tools/llvm-config/CMakeLists.txt
index 8d8376271de8..50c84e6c3d08 100644
--- a/tools/llvm-config/CMakeLists.txt
+++ b/tools/llvm-config/CMakeLists.txt
@@ -33,3 +33,18 @@ add_llvm_tool(llvm-config
 
 # Add the dependency on the generation step.
 add_file_dependencies(${CMAKE_CURRENT_SOURCE_DIR}/llvm-config.cpp ${BUILDVARIABLES_OBJPATH})
+
+if(CMAKE_CROSSCOMPILING)
+  set(${project}_LLVM_CONFIG_EXE "${LLVM_NATIVE_BUILD}/bin/llvm-config")
+  set(${project}_LLVM_CONFIG_EXE ${${project}_LLVM_CONFIG_EXE} PARENT_SCOPE)
+
+  add_custom_command(OUTPUT "${${project}_LLVM_CONFIG_EXE}"
+    COMMAND ${CMAKE_COMMAND} --build . --target llvm-config --config $<CONFIGURATION>
+    DEPENDS ${LLVM_NATIVE_BUILD}/CMakeCache.txt
+    WORKING_DIRECTORY ${LLVM_NATIVE_BUILD}
+    COMMENT "Building native llvm-config...")
+  add_custom_target(${project}NativeLLVMConfig DEPENDS ${${project}_LLVM_CONFIG_EXE})
+  add_dependencies(${project}NativeLLVMConfig ConfigureNativeLLVM)
+
+  add_dependencies(llvm-config ${project}NativeLLVMConfig)
+endif(CMAKE_CROSSCOMPILING)
diff --git a/tools/llvm-config/Makefile b/tools/llvm-config/Makefile
index b78551e68a79..1ff8b6f04063 100644
--- a/tools/llvm-config/Makefile
+++ b/tools/llvm-config/Makefile
@@ -59,6 +59,8 @@ $(ObjDir)/BuildVariables.inc: $(BUILDVARIABLES_SRCPATH) Makefile $(ObjDir)/.dir
 	  >> temp.sed
 	$(Verb) $(ECHO) 's/@LLVM_BUILDMODE@/$(subst /,\/,$(BuildMode))/' \
 	  >> temp.sed
+	$(Verb) $(ECHO) 's/@LLVM_LIBDIR_SUFFIX@//' \
+	  >> temp.sed
 	$(Verb) $(ECHO) 's/@LLVM_SYSTEM_LIBS@/$(subst /,\/,$(LLVM_SYSTEM_LIBS))/' \
 	  >> temp.sed
 	$(Verb) $(ECHO) 's/@LLVM_TARGETS_BUILT@/$(subst /,\/,$(TARGETS_TO_BUILD))/' \
diff --git a/tools/llvm-config/llvm-config.cpp b/tools/llvm-config/llvm-config.cpp
index ed1c8c3b2ae7..224035ac497b 100644
--- a/tools/llvm-config/llvm-config.cpp
+++ b/tools/llvm-config/llvm-config.cpp
@@ -243,16 +243,18 @@ int main(int argc, char **argv) {
     case MakefileStyle:
       ActivePrefix = ActiveObjRoot;
       ActiveBinDir = ActiveObjRoot + "/" + build_mode + "/bin";
-      ActiveLibDir = ActiveObjRoot + "/" + build_mode + "/lib";
+      ActiveLibDir =
+          ActiveObjRoot + "/" + build_mode + "/lib" + LLVM_LIBDIR_SUFFIX;
       break;
     case CMakeStyle:
       ActiveBinDir = ActiveObjRoot + "/bin";
-      ActiveLibDir = ActiveObjRoot + "/lib";
+      ActiveLibDir = ActiveObjRoot + "/lib" + LLVM_LIBDIR_SUFFIX;
       break;
     case CMakeBuildModeStyle:
       ActivePrefix = ActiveObjRoot;
       ActiveBinDir = ActiveObjRoot + "/bin/" + build_mode;
-      ActiveLibDir = ActiveObjRoot + "/lib/" + build_mode;
+      ActiveLibDir =
+          ActiveObjRoot + "/lib" + LLVM_LIBDIR_SUFFIX + "/" + build_mode;
       break;
     }
 
@@ -263,7 +265,7 @@ int main(int argc, char **argv) {
     ActivePrefix = CurrentExecPrefix;
     ActiveIncludeDir = ActivePrefix + "/include";
     ActiveBinDir = ActivePrefix + "/bin";
-    ActiveLibDir = ActivePrefix + "/lib";
+    ActiveLibDir = ActivePrefix + "/lib" + LLVM_LIBDIR_SUFFIX;
     ActiveIncludeOption = "-I" + ActiveIncludeDir;
   }
 
diff --git a/tools/llvm-cov/CMakeLists.txt b/tools/llvm-cov/CMakeLists.txt
index 67cea71dd016..b2d2b897ec95 100644
--- a/tools/llvm-cov/CMakeLists.txt
+++ b/tools/llvm-cov/CMakeLists.txt
@@ -1,5 +1,13 @@
-set(LLVM_LINK_COMPONENTS core support )
+set(LLVM_LINK_COMPONENTS core support object profiledata)
 
 add_llvm_tool(llvm-cov
   llvm-cov.cpp
+  gcov.cpp
+  CodeCoverage.cpp
+  CoverageFilters.cpp
+  CoverageReport.cpp
+  CoverageSummary.cpp
+  CoverageSummaryInfo.cpp
+  SourceCoverageView.cpp
+  TestingSupport.cpp
   )
diff --git a/tools/llvm-cov/CodeCoverage.cpp b/tools/llvm-cov/CodeCoverage.cpp
new file mode 100644
index 000000000000..7cee4d4b3f2e
--- /dev/null
+++ b/tools/llvm-cov/CodeCoverage.cpp
@@ -0,0 +1,483 @@
+//===- CodeCoverage.cpp - Coverage tool based on profiling instrumentation-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// The 'CodeCoverageTool' class implements a command line tool to analyze and
+// report coverage information using the profiling instrumentation and code
+// coverage mapping.
+//
+//===----------------------------------------------------------------------===//
+
+#include "RenderingSupport.h"
+#include "CoverageFilters.h"
+#include "CoverageReport.h"
+#include "CoverageSummary.h"
+#include "CoverageViewOptions.h"
+#include "SourceCoverageView.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ProfileData/CoverageMapping.h"
+#include "llvm/ProfileData/CoverageMappingReader.h"
+#include "llvm/ProfileData/InstrProfReader.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/Format.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/Path.h"
+#include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/Signals.h"
+#include <functional>
+#include <system_error>
+
+using namespace llvm;
+using namespace coverage;
+
+namespace {
+/// \brief The implementation of the coverage tool.
+class CodeCoverageTool {
+public:
+  enum Command {
+    /// \brief The show command.
+    Show,
+    /// \brief The report command.
+    Report
+  };
+
+  /// \brief Print the error message to the error output stream.
+  void error(const Twine &Message, StringRef Whence = "");
+
+  /// \brief Return a memory buffer for the given source file.
+  ErrorOr<const MemoryBuffer &> getSourceFile(StringRef SourceFile);
+
+  /// \brief Create source views for the expansions of the view.
+  void attachExpansionSubViews(SourceCoverageView &View,
+                               ArrayRef<ExpansionRecord> Expansions,
+                               CoverageMapping &Coverage);
+
+  /// \brief Create the source view of a particular function.
+  std::unique_ptr<SourceCoverageView>
+  createFunctionView(const FunctionRecord &Function, CoverageMapping &Coverage);
+
+  /// \brief Create the main source view of a particular source file.
+  std::unique_ptr<SourceCoverageView>
+  createSourceFileView(StringRef SourceFile, CoverageMapping &Coverage);
+
+  /// \brief Load the coverage mapping data. Return true if an error occured.
+  std::unique_ptr<CoverageMapping> load();
+
+  int run(Command Cmd, int argc, const char **argv);
+
+  typedef std::function<int(int, const char **)> CommandLineParserType;
+
+  int show(int argc, const char **argv,
+           CommandLineParserType commandLineParser);
+
+  int report(int argc, const char **argv,
+             CommandLineParserType commandLineParser);
+
+  std::string ObjectFilename;
+  CoverageViewOptions ViewOpts;
+  std::string PGOFilename;
+  CoverageFiltersMatchAll Filters;
+  std::vector<std::string> SourceFiles;
+  std::vector<std::pair<std::string, std::unique_ptr<MemoryBuffer>>>
+      LoadedSourceFiles;
+  bool CompareFilenamesOnly;
+  StringMap<std::string> RemappedFilenames;
+};
+}
+
+void CodeCoverageTool::error(const Twine &Message, StringRef Whence) {
+  errs() << "error: ";
+  if (!Whence.empty())
+    errs() << Whence << ": ";
+  errs() << Message << "\n";
+}
+
+ErrorOr<const MemoryBuffer &>
+CodeCoverageTool::getSourceFile(StringRef SourceFile) {
+  // If we've remapped filenames, look up the real location for this file.
+  if (!RemappedFilenames.empty()) {
+    auto Loc = RemappedFilenames.find(SourceFile);
+    if (Loc != RemappedFilenames.end())
+      SourceFile = Loc->second;
+  }
+  for (const auto &Files : LoadedSourceFiles)
+    if (sys::fs::equivalent(SourceFile, Files.first))
+      return *Files.second;
+  auto Buffer = MemoryBuffer::getFile(SourceFile);
+  if (auto EC = Buffer.getError()) {
+    error(EC.message(), SourceFile);
+    return EC;
+  }
+  LoadedSourceFiles.push_back(
+      std::make_pair(SourceFile, std::move(Buffer.get())));
+  return *LoadedSourceFiles.back().second;
+}
+
+void
+CodeCoverageTool::attachExpansionSubViews(SourceCoverageView &View,
+                                          ArrayRef<ExpansionRecord> Expansions,
+                                          CoverageMapping &Coverage) {
+  if (!ViewOpts.ShowExpandedRegions)
+    return;
+  for (const auto &Expansion : Expansions) {
+    auto ExpansionCoverage = Coverage.getCoverageForExpansion(Expansion);
+    if (ExpansionCoverage.empty())
+      continue;
+    auto SourceBuffer = getSourceFile(ExpansionCoverage.getFilename());
+    if (!SourceBuffer)
+      continue;
+
+    auto SubViewExpansions = ExpansionCoverage.getExpansions();
+    auto SubView = llvm::make_unique<SourceCoverageView>(
+        SourceBuffer.get(), ViewOpts, std::move(ExpansionCoverage));
+    attachExpansionSubViews(*SubView, SubViewExpansions, Coverage);
+    View.addExpansion(Expansion.Region, std::move(SubView));
+  }
+}
+
+std::unique_ptr<SourceCoverageView>
+CodeCoverageTool::createFunctionView(const FunctionRecord &Function,
+                                     CoverageMapping &Coverage) {
+  auto FunctionCoverage = Coverage.getCoverageForFunction(Function);
+  if (FunctionCoverage.empty())
+    return nullptr;
+  auto SourceBuffer = getSourceFile(FunctionCoverage.getFilename());
+  if (!SourceBuffer)
+    return nullptr;
+
+  auto Expansions = FunctionCoverage.getExpansions();
+  auto View = llvm::make_unique<SourceCoverageView>(
+      SourceBuffer.get(), ViewOpts, std::move(FunctionCoverage));
+  attachExpansionSubViews(*View, Expansions, Coverage);
+
+  return View;
+}
+
+std::unique_ptr<SourceCoverageView>
+CodeCoverageTool::createSourceFileView(StringRef SourceFile,
+                                       CoverageMapping &Coverage) {
+  auto SourceBuffer = getSourceFile(SourceFile);
+  if (!SourceBuffer)
+    return nullptr;
+  auto FileCoverage = Coverage.getCoverageForFile(SourceFile);
+  if (FileCoverage.empty())
+    return nullptr;
+
+  auto Expansions = FileCoverage.getExpansions();
+  auto View = llvm::make_unique<SourceCoverageView>(
+      SourceBuffer.get(), ViewOpts, std::move(FileCoverage));
+  attachExpansionSubViews(*View, Expansions, Coverage);
+
+  for (auto Function : Coverage.getInstantiations(SourceFile)) {
+    auto SubViewCoverage = Coverage.getCoverageForFunction(*Function);
+    auto SubViewExpansions = SubViewCoverage.getExpansions();
+    auto SubView = llvm::make_unique<SourceCoverageView>(
+        SourceBuffer.get(), ViewOpts, std::move(SubViewCoverage));
+    attachExpansionSubViews(*SubView, SubViewExpansions, Coverage);
+
+    if (SubView) {
+      unsigned FileID = Function->CountedRegions.front().FileID;
+      unsigned Line = 0;
+      for (const auto &CR : Function->CountedRegions)
+        if (CR.FileID == FileID)
+          Line = std::max(CR.LineEnd, Line);
+      View->addInstantiation(Function->Name, Line, std::move(SubView));
+    }
+  }
+  return View;
+}
+
+std::unique_ptr<CoverageMapping> CodeCoverageTool::load() {
+  auto CoverageOrErr = CoverageMapping::load(ObjectFilename, PGOFilename);
+  if (std::error_code EC = CoverageOrErr.getError()) {
+    colored_ostream(errs(), raw_ostream::RED)
+        << "error: Failed to load coverage: " << EC.message();
+    errs() << "\n";
+    return nullptr;
+  }
+  auto Coverage = std::move(CoverageOrErr.get());
+  unsigned Mismatched = Coverage->getMismatchedCount();
+  if (Mismatched) {
+    colored_ostream(errs(), raw_ostream::RED)
+        << "warning: " << Mismatched << " functions have mismatched data. ";
+    errs() << "\n";
+  }
+
+  if (CompareFilenamesOnly) {
+    auto CoveredFiles = Coverage.get()->getUniqueSourceFiles();
+    for (auto &SF : SourceFiles) {
+      StringRef SFBase = sys::path::filename(SF);
+      for (const auto &CF : CoveredFiles)
+        if (SFBase == sys::path::filename(CF)) {
+          RemappedFilenames[CF] = SF;
+          SF = CF;
+          break;
+        }
+    }
+  }
+
+  return Coverage;
+}
+
+int CodeCoverageTool::run(Command Cmd, int argc, const char **argv) {
+  // Print a stack trace if we signal out.
+  sys::PrintStackTraceOnErrorSignal();
+  PrettyStackTraceProgram X(argc, argv);
+  llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
+
+  cl::opt<std::string, true> ObjectFilename(
+      cl::Positional, cl::Required, cl::location(this->ObjectFilename),
+      cl::desc("Covered executable or object file."));
+
+  cl::list<std::string> InputSourceFiles(
+      cl::Positional, cl::desc("<Source files>"), cl::ZeroOrMore);
+
+  cl::opt<std::string, true> PGOFilename(
+      "instr-profile", cl::Required, cl::location(this->PGOFilename),
+      cl::desc(
+          "File with the profile data obtained after an instrumented run"));
+
+  cl::opt<bool> DebugDump("dump", cl::Optional,
+                          cl::desc("Show internal debug dump"));
+
+  cl::opt<bool> FilenameEquivalence(
+      "filename-equivalence", cl::Optional,
+      cl::desc("Treat source files as equivalent to paths in the coverage data "
+               "when the file names match, even if the full paths do not"));
+
+  cl::OptionCategory FilteringCategory("Function filtering options");
+
+  cl::list<std::string> NameFilters(
+      "name", cl::Optional,
+      cl::desc("Show code coverage only for functions with the given name"),
+      cl::ZeroOrMore, cl::cat(FilteringCategory));
+
+  cl::list<std::string> NameRegexFilters(
+      "name-regex", cl::Optional,
+      cl::desc("Show code coverage only for functions that match the given "
+               "regular expression"),
+      cl::ZeroOrMore, cl::cat(FilteringCategory));
+
+  cl::opt<double> RegionCoverageLtFilter(
+      "region-coverage-lt", cl::Optional,
+      cl::desc("Show code coverage only for functions with region coverage "
+               "less than the given threshold"),
+      cl::cat(FilteringCategory));
+
+  cl::opt<double> RegionCoverageGtFilter(
+      "region-coverage-gt", cl::Optional,
+      cl::desc("Show code coverage only for functions with region coverage "
+               "greater than the given threshold"),
+      cl::cat(FilteringCategory));
+
+  cl::opt<double> LineCoverageLtFilter(
+      "line-coverage-lt", cl::Optional,
+      cl::desc("Show code coverage only for functions with line coverage less "
+               "than the given threshold"),
+      cl::cat(FilteringCategory));
+
+  cl::opt<double> LineCoverageGtFilter(
+      "line-coverage-gt", cl::Optional,
+      cl::desc("Show code coverage only for functions with line coverage "
+               "greater than the given threshold"),
+      cl::cat(FilteringCategory));
+
+  auto commandLineParser = [&, this](int argc, const char **argv) -> int {
+    cl::ParseCommandLineOptions(argc, argv, "LLVM code coverage tool\n");
+    ViewOpts.Debug = DebugDump;
+    CompareFilenamesOnly = FilenameEquivalence;
+
+    // Create the function filters
+    if (!NameFilters.empty() || !NameRegexFilters.empty()) {
+      auto NameFilterer = new CoverageFilters;
+      for (const auto &Name : NameFilters)
+        NameFilterer->push_back(llvm::make_unique<NameCoverageFilter>(Name));
+      for (const auto &Regex : NameRegexFilters)
+        NameFilterer->push_back(
+            llvm::make_unique<NameRegexCoverageFilter>(Regex));
+      Filters.push_back(std::unique_ptr<CoverageFilter>(NameFilterer));
+    }
+    if (RegionCoverageLtFilter.getNumOccurrences() ||
+        RegionCoverageGtFilter.getNumOccurrences() ||
+        LineCoverageLtFilter.getNumOccurrences() ||
+        LineCoverageGtFilter.getNumOccurrences()) {
+      auto StatFilterer = new CoverageFilters;
+      if (RegionCoverageLtFilter.getNumOccurrences())
+        StatFilterer->push_back(llvm::make_unique<RegionCoverageFilter>(
+            RegionCoverageFilter::LessThan, RegionCoverageLtFilter));
+      if (RegionCoverageGtFilter.getNumOccurrences())
+        StatFilterer->push_back(llvm::make_unique<RegionCoverageFilter>(
+            RegionCoverageFilter::GreaterThan, RegionCoverageGtFilter));
+      if (LineCoverageLtFilter.getNumOccurrences())
+        StatFilterer->push_back(llvm::make_unique<LineCoverageFilter>(
+            LineCoverageFilter::LessThan, LineCoverageLtFilter));
+      if (LineCoverageGtFilter.getNumOccurrences())
+        StatFilterer->push_back(llvm::make_unique<LineCoverageFilter>(
+            RegionCoverageFilter::GreaterThan, LineCoverageGtFilter));
+      Filters.push_back(std::unique_ptr<CoverageFilter>(StatFilterer));
+    }
+
+    for (const auto &File : InputSourceFiles) {
+      SmallString<128> Path(File);
+      if (std::error_code EC = sys::fs::make_absolute(Path)) {
+        errs() << "error: " << File << ": " << EC.message();
+        return 1;
+      }
+      SourceFiles.push_back(Path.str());
+    }
+    return 0;
+  };
+
+  switch (Cmd) {
+  case Show:
+    return show(argc, argv, commandLineParser);
+  case Report:
+    return report(argc, argv, commandLineParser);
+  }
+  return 0;
+}
+
+int CodeCoverageTool::show(int argc, const char **argv,
+                           CommandLineParserType commandLineParser) {
+
+  cl::OptionCategory ViewCategory("Viewing options");
+
+  cl::opt<bool> ShowLineExecutionCounts(
+      "show-line-counts", cl::Optional,
+      cl::desc("Show the execution counts for each line"), cl::init(true),
+      cl::cat(ViewCategory));
+
+  cl::opt<bool> ShowRegions(
+      "show-regions", cl::Optional,
+      cl::desc("Show the execution counts for each region"),
+      cl::cat(ViewCategory));
+
+  cl::opt<bool> ShowBestLineRegionsCounts(
+      "show-line-counts-or-regions", cl::Optional,
+      cl::desc("Show the execution counts for each line, or the execution "
+               "counts for each region on lines that have multiple regions"),
+      cl::cat(ViewCategory));
+
+  cl::opt<bool> ShowExpansions("show-expansions", cl::Optional,
+                               cl::desc("Show expanded source regions"),
+                               cl::cat(ViewCategory));
+
+  cl::opt<bool> ShowInstantiations("show-instantiations", cl::Optional,
+                                   cl::desc("Show function instantiations"),
+                                   cl::cat(ViewCategory));
+
+  cl::opt<bool> NoColors("no-colors", cl::Optional,
+                         cl::desc("Don't show text colors"), cl::init(false),
+                         cl::cat(ViewCategory));
+
+  auto Err = commandLineParser(argc, argv);
+  if (Err)
+    return Err;
+
+  ViewOpts.Colors = !NoColors;
+  ViewOpts.ShowLineNumbers = true;
+  ViewOpts.ShowLineStats = ShowLineExecutionCounts.getNumOccurrences() != 0 ||
+                           !ShowRegions || ShowBestLineRegionsCounts;
+  ViewOpts.ShowRegionMarkers = ShowRegions || ShowBestLineRegionsCounts;
+  ViewOpts.ShowLineStatsOrRegionMarkers = ShowBestLineRegionsCounts;
+  ViewOpts.ShowExpandedRegions = ShowExpansions;
+  ViewOpts.ShowFunctionInstantiations = ShowInstantiations;
+
+  auto Coverage = load();
+  if (!Coverage)
+    return 1;
+
+  if (!Filters.empty()) {
+    // Show functions
+    for (const auto &Function : Coverage->getCoveredFunctions()) {
+      if (!Filters.matches(Function))
+        continue;
+
+      auto mainView = createFunctionView(Function, *Coverage);
+      if (!mainView) {
+        ViewOpts.colored_ostream(outs(), raw_ostream::RED)
+            << "warning: Could not read coverage for '" << Function.Name;
+        outs() << "\n";
+        continue;
+      }
+      ViewOpts.colored_ostream(outs(), raw_ostream::CYAN) << Function.Name
+                                                          << ":";
+      outs() << "\n";
+      mainView->render(outs(), /*WholeFile=*/false);
+      outs() << "\n";
+    }
+    return 0;
+  }
+
+  // Show files
+  bool ShowFilenames = SourceFiles.size() != 1;
+
+  if (SourceFiles.empty())
+    // Get the source files from the function coverage mapping
+    for (StringRef Filename : Coverage->getUniqueSourceFiles())
+      SourceFiles.push_back(Filename);
+
+  for (const auto &SourceFile : SourceFiles) {
+    auto mainView = createSourceFileView(SourceFile, *Coverage);
+    if (!mainView) {
+      ViewOpts.colored_ostream(outs(), raw_ostream::RED)
+          << "warning: The file '" << SourceFile << "' isn't covered.";
+      outs() << "\n";
+      continue;
+    }
+
+    if (ShowFilenames) {
+      ViewOpts.colored_ostream(outs(), raw_ostream::CYAN) << SourceFile << ":";
+      outs() << "\n";
+    }
+    mainView->render(outs(), /*Wholefile=*/true);
+    if (SourceFiles.size() > 1)
+      outs() << "\n";
+  }
+
+  return 0;
+}
+
+int CodeCoverageTool::report(int argc, const char **argv,
+                             CommandLineParserType commandLineParser) {
+  cl::opt<bool> NoColors("no-colors", cl::Optional,
+                         cl::desc("Don't show text colors"), cl::init(false));
+
+  auto Err = commandLineParser(argc, argv);
+  if (Err)
+    return Err;
+
+  ViewOpts.Colors = !NoColors;
+
+  auto Coverage = load();
+  if (!Coverage)
+    return 1;
+
+  CoverageSummary Summarizer;
+  Summarizer.createSummaries(*Coverage);
+  CoverageReport Report(ViewOpts, Summarizer);
+  if (SourceFiles.empty() && Filters.empty()) {
+    Report.renderFileReports(llvm::outs());
+    return 0;
+  }
+
+  Report.renderFunctionReports(llvm::outs());
+  return 0;
+}
+
+int showMain(int argc, const char *argv[]) {
+  CodeCoverageTool Tool;
+  return Tool.run(CodeCoverageTool::Show, argc, argv);
+}
+
+int reportMain(int argc, const char *argv[]) {
+  CodeCoverageTool Tool;
+  return Tool.run(CodeCoverageTool::Report, argc, argv);
+}
diff --git a/tools/llvm-cov/CoverageFilters.cpp b/tools/llvm-cov/CoverageFilters.cpp
new file mode 100644
index 000000000000..325dd7235789
--- /dev/null
+++ b/tools/llvm-cov/CoverageFilters.cpp
@@ -0,0 +1,59 @@
+//===- CoverageFilters.cpp - Function coverage mapping filters ------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// These classes provide filtering for function coverage mapping records.
+//
+//===----------------------------------------------------------------------===//
+
+#include "CoverageFilters.h"
+#include "CoverageSummaryInfo.h"
+#include "llvm/Support/Regex.h"
+
+using namespace llvm;
+
+bool NameCoverageFilter::matches(const coverage::FunctionRecord &Function) {
+  StringRef FuncName = Function.Name;
+  return FuncName.find(Name) != StringRef::npos;
+}
+
+bool
+NameRegexCoverageFilter::matches(const coverage::FunctionRecord &Function) {
+  return llvm::Regex(Regex).match(Function.Name);
+}
+
+bool RegionCoverageFilter::matches(const coverage::FunctionRecord &Function) {
+  return PassesThreshold(FunctionCoverageSummary::get(Function)
+                             .RegionCoverage.getPercentCovered());
+}
+
+bool LineCoverageFilter::matches(const coverage::FunctionRecord &Function) {
+  return PassesThreshold(
+      FunctionCoverageSummary::get(Function).LineCoverage.getPercentCovered());
+}
+
+void CoverageFilters::push_back(std::unique_ptr<CoverageFilter> Filter) {
+  Filters.push_back(std::move(Filter));
+}
+
+bool CoverageFilters::matches(const coverage::FunctionRecord &Function) {
+  for (const auto &Filter : Filters) {
+    if (Filter->matches(Function))
+      return true;
+  }
+  return false;
+}
+
+bool
+CoverageFiltersMatchAll::matches(const coverage::FunctionRecord &Function) {
+  for (const auto &Filter : Filters) {
+    if (!Filter->matches(Function))
+      return false;
+  }
+  return true;
+}
diff --git a/tools/llvm-cov/CoverageFilters.h b/tools/llvm-cov/CoverageFilters.h
new file mode 100644
index 000000000000..dc5dc98807b1
--- /dev/null
+++ b/tools/llvm-cov/CoverageFilters.h
@@ -0,0 +1,127 @@
+//===- CoverageFilters.h - Function coverage mapping filters --------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// These classes provide filtering for function coverage mapping records.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_COV_COVERAGEFILTERS_H
+#define LLVM_COV_COVERAGEFILTERS_H
+
+#include "llvm/ProfileData/CoverageMapping.h"
+#include <memory>
+#include <vector>
+
+namespace llvm {
+
+/// \brief Matches specific functions that pass the requirement of this filter.
+class CoverageFilter {
+public:
+  virtual ~CoverageFilter() {}
+
+  /// \brief Return true if the function passes the requirements of this filter.
+  virtual bool matches(const coverage::FunctionRecord &Function) {
+    return true;
+  }
+};
+
+/// \brief Matches functions that contain a specific string in their name.
+class NameCoverageFilter : public CoverageFilter {
+  StringRef Name;
+
+public:
+  NameCoverageFilter(StringRef Name) : Name(Name) {}
+
+  bool matches(const coverage::FunctionRecord &Function) override;
+};
+
+/// \brief Matches functions whose name matches a certain regular expression.
+class NameRegexCoverageFilter : public CoverageFilter {
+  StringRef Regex;
+
+public:
+  NameRegexCoverageFilter(StringRef Regex) : Regex(Regex) {}
+
+  bool matches(const coverage::FunctionRecord &Function) override;
+};
+
+/// \brief Matches numbers that pass a certain threshold.
+template <typename T> class StatisticThresholdFilter {
+public:
+  enum Operation { LessThan, GreaterThan };
+
+protected:
+  Operation Op;
+  T Threshold;
+
+  StatisticThresholdFilter(Operation Op, T Threshold)
+      : Op(Op), Threshold(Threshold) {}
+
+  /// \brief Return true if the given number is less than
+  /// or greater than the certain threshold.
+  bool PassesThreshold(T Value) const {
+    switch (Op) {
+    case LessThan:
+      return Value < Threshold;
+    case GreaterThan:
+      return Value > Threshold;
+    }
+    return false;
+  }
+};
+
+/// \brief Matches functions whose region coverage percentage
+/// is above/below a certain percentage.
+class RegionCoverageFilter : public CoverageFilter,
+                             public StatisticThresholdFilter<double> {
+public:
+  RegionCoverageFilter(Operation Op, double Threshold)
+      : StatisticThresholdFilter(Op, Threshold) {}
+
+  bool matches(const coverage::FunctionRecord &Function) override;
+};
+
+/// \brief Matches functions whose line coverage percentage
+/// is above/below a certain percentage.
+class LineCoverageFilter : public CoverageFilter,
+                           public StatisticThresholdFilter<double> {
+public:
+  LineCoverageFilter(Operation Op, double Threshold)
+      : StatisticThresholdFilter(Op, Threshold) {}
+
+  bool matches(const coverage::FunctionRecord &Function) override;
+};
+
+/// \brief A collection of filters.
+/// Matches functions that match any filters contained
+/// in an instance of this class.
+class CoverageFilters : public CoverageFilter {
+protected:
+  std::vector<std::unique_ptr<CoverageFilter>> Filters;
+
+public:
+  /// \brief Append a filter to this collection.
+  void push_back(std::unique_ptr<CoverageFilter> Filter);
+
+  bool empty() const { return Filters.empty(); }
+
+  bool matches(const coverage::FunctionRecord &Function) override;
+};
+
+/// \brief A collection of filters.
+/// Matches functions that match all of the filters contained
+/// in an instance of this class.
+class CoverageFiltersMatchAll : public CoverageFilters {
+public:
+  bool matches(const coverage::FunctionRecord &Function) override;
+};
+
+} // namespace llvm
+
+#endif // LLVM_COV_COVERAGEFILTERS_H
diff --git a/tools/llvm-cov/CoverageReport.cpp b/tools/llvm-cov/CoverageReport.cpp
new file mode 100644
index 000000000000..6ae6ba55eb9c
--- /dev/null
+++ b/tools/llvm-cov/CoverageReport.cpp
@@ -0,0 +1,202 @@
+//===- CoverageReport.cpp - Code coverage report -------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This class implements rendering of a code coverage report.
+//
+//===----------------------------------------------------------------------===//
+
+#include "CoverageReport.h"
+#include "CoverageSummary.h"
+#include "RenderingSupport.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/Format.h"
+
+using namespace llvm;
+namespace {
+/// \brief Helper struct which prints trimmed and aligned columns.
+struct Column {
+  enum TrimKind { NoTrim, LeftTrim, RightTrim };
+
+  enum AlignmentKind { LeftAlignment, RightAlignment };
+
+  StringRef Str;
+  unsigned Width;
+  TrimKind Trim;
+  AlignmentKind Alignment;
+
+  Column(StringRef Str, unsigned Width)
+      : Str(Str), Width(Width), Trim(NoTrim), Alignment(LeftAlignment) {}
+
+  Column &set(TrimKind Value) {
+    Trim = Value;
+    return *this;
+  }
+
+  Column &set(AlignmentKind Value) {
+    Alignment = Value;
+    return *this;
+  }
+
+  void render(raw_ostream &OS) const;
+};
+raw_ostream &operator<<(raw_ostream &OS, const Column &Value) {
+  Value.render(OS);
+  return OS;
+}
+}
+
+void Column::render(raw_ostream &OS) const {
+  if (Str.size() <= Width) {
+    if (Alignment == RightAlignment) {
+      OS.indent(Width - Str.size());
+      OS << Str;
+      return;
+    }
+    OS << Str;
+    OS.indent(Width - Str.size());
+    return;
+  }
+
+  switch (Trim) {
+  case NoTrim:
+    OS << Str.substr(0, Width);
+    break;
+  case LeftTrim:
+    OS << "..." << Str.substr(Str.size() - Width + 3);
+    break;
+  case RightTrim:
+    OS << Str.substr(0, Width - 3) << "...";
+    break;
+  }
+}
+
+static Column column(StringRef Str, unsigned Width) {
+  return Column(Str, Width);
+}
+
+template <typename T>
+static Column column(StringRef Str, unsigned Width, const T &Value) {
+  return Column(Str, Width).set(Value);
+}
+
+static const unsigned FileReportColumns[] = {25, 10, 8, 8, 10, 10};
+static const unsigned FunctionReportColumns[] = {25, 10, 8, 8, 10, 8, 8};
+
+/// \brief Prints a horizontal divider which spans across the given columns.
+template <typename T, size_t N>
+static void renderDivider(T (&Columns)[N], raw_ostream &OS) {
+  unsigned Length = 0;
+  for (unsigned I = 0; I < N; ++I)
+    Length += Columns[I];
+  for (unsigned I = 0; I < Length; ++I)
+    OS << '-';
+}
+
+/// \brief Return the color which correponds to the coverage
+/// percentage of a certain metric.
+template <typename T>
+static raw_ostream::Colors determineCoveragePercentageColor(const T &Info) {
+  if (Info.isFullyCovered())
+    return raw_ostream::GREEN;
+  return Info.getPercentCovered() >= 80.0 ? raw_ostream::YELLOW
+                                          : raw_ostream::RED;
+}
+
+void CoverageReport::render(const FileCoverageSummary &File, raw_ostream &OS) {
+  OS << column(File.Name, FileReportColumns[0], Column::LeftTrim)
+     << format("%*u", FileReportColumns[1], (unsigned)File.RegionCoverage.NumRegions);
+  Options.colored_ostream(OS, File.RegionCoverage.isFullyCovered()
+                                  ? raw_ostream::GREEN
+                                  : raw_ostream::RED)
+      << format("%*u", FileReportColumns[2], (unsigned)File.RegionCoverage.NotCovered);
+  Options.colored_ostream(OS,
+                          determineCoveragePercentageColor(File.RegionCoverage))
+      << format("%*.2f", FileReportColumns[3] - 1,
+                File.RegionCoverage.getPercentCovered()) << '%';
+  OS << format("%*u", FileReportColumns[4],
+               (unsigned)File.FunctionCoverage.NumFunctions);
+  Options.colored_ostream(
+      OS, determineCoveragePercentageColor(File.FunctionCoverage))
+      << format("%*.2f", FileReportColumns[5] - 1,
+                File.FunctionCoverage.getPercentCovered()) << '%';
+  OS << "\n";
+}
+
+void CoverageReport::render(const FunctionCoverageSummary &Function,
+                            raw_ostream &OS) {
+  OS << column(Function.Name, FunctionReportColumns[0], Column::RightTrim)
+     << format("%*u", FunctionReportColumns[1],
+               (unsigned)Function.RegionCoverage.NumRegions);
+  Options.colored_ostream(OS, Function.RegionCoverage.isFullyCovered()
+                                  ? raw_ostream::GREEN
+                                  : raw_ostream::RED)
+      << format("%*u", FunctionReportColumns[2],
+                (unsigned)Function.RegionCoverage.NotCovered);
+  Options.colored_ostream(
+      OS, determineCoveragePercentageColor(Function.RegionCoverage))
+      << format("%*.2f", FunctionReportColumns[3] - 1,
+                Function.RegionCoverage.getPercentCovered()) << '%';
+  OS << format("%*u", FunctionReportColumns[4],
+               (unsigned)Function.LineCoverage.NumLines);
+  Options.colored_ostream(OS, Function.LineCoverage.isFullyCovered()
+                                  ? raw_ostream::GREEN
+                                  : raw_ostream::RED)
+      << format("%*u", FunctionReportColumns[5],
+                (unsigned)Function.LineCoverage.NotCovered);
+  Options.colored_ostream(
+      OS, determineCoveragePercentageColor(Function.LineCoverage))
+      << format("%*.2f", FunctionReportColumns[6] - 1,
+                Function.LineCoverage.getPercentCovered()) << '%';
+  OS << "\n";
+}
+
+void CoverageReport::renderFunctionReports(raw_ostream &OS) {
+  bool isFirst = true;
+  for (const auto &File : Summary.getFileSummaries()) {
+    if (isFirst)
+      isFirst = false;
+    else
+      OS << "\n";
+    OS << "File '" << File.Name << "':\n";
+    OS << column("Name", FunctionReportColumns[0])
+       << column("Regions", FunctionReportColumns[1], Column::RightAlignment)
+       << column("Miss", FunctionReportColumns[2], Column::RightAlignment)
+       << column("Cover", FunctionReportColumns[3], Column::RightAlignment)
+       << column("Lines", FunctionReportColumns[4], Column::RightAlignment)
+       << column("Miss", FunctionReportColumns[5], Column::RightAlignment)
+       << column("Cover", FunctionReportColumns[6], Column::RightAlignment);
+    OS << "\n";
+    renderDivider(FunctionReportColumns, OS);
+    OS << "\n";
+    for (const auto &Function : File.FunctionSummaries)
+      render(Function, OS);
+    renderDivider(FunctionReportColumns, OS);
+    OS << "\n";
+    render(FunctionCoverageSummary("TOTAL", /*ExecutionCount=*/0,
+                                   File.RegionCoverage, File.LineCoverage),
+           OS);
+  }
+}
+
+void CoverageReport::renderFileReports(raw_ostream &OS) {
+  OS << column("Filename", FileReportColumns[0])
+     << column("Regions", FileReportColumns[1], Column::RightAlignment)
+     << column("Miss", FileReportColumns[2], Column::RightAlignment)
+     << column("Cover", FileReportColumns[3], Column::RightAlignment)
+     << column("Functions", FileReportColumns[4], Column::RightAlignment)
+     << column("Executed", FileReportColumns[5], Column::RightAlignment)
+     << "\n";
+  renderDivider(FileReportColumns, OS);
+  OS << "\n";
+  for (const auto &File : Summary.getFileSummaries())
+    render(File, OS);
+  renderDivider(FileReportColumns, OS);
+  OS << "\n";
+  render(Summary.getCombinedFileSummaries(), OS);
+}
diff --git a/tools/llvm-cov/CoverageReport.h b/tools/llvm-cov/CoverageReport.h
new file mode 100644
index 000000000000..d18611740ae6
--- /dev/null
+++ b/tools/llvm-cov/CoverageReport.h
@@ -0,0 +1,40 @@
+//===- CoverageReport.h - Code coverage report ---------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This class implements rendering of a code coverage report.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_COV_COVERAGEREPORT_H
+#define LLVM_COV_COVERAGEREPORT_H
+
+#include "CoverageSummary.h"
+#include "CoverageViewOptions.h"
+
+namespace llvm {
+
+/// \brief Displays the code coverage report.
+class CoverageReport {
+  const CoverageViewOptions &Options;
+  CoverageSummary &Summary;
+
+  void render(const FileCoverageSummary &File, raw_ostream &OS);
+  void render(const FunctionCoverageSummary &Function, raw_ostream &OS);
+
+public:
+  CoverageReport(const CoverageViewOptions &Options, CoverageSummary &Summary)
+      : Options(Options), Summary(Summary) {}
+
+  void renderFunctionReports(raw_ostream &OS);
+
+  void renderFileReports(raw_ostream &OS);
+};
+}
+
+#endif // LLVM_COV_COVERAGEREPORT_H
diff --git a/tools/llvm-cov/CoverageSummary.cpp b/tools/llvm-cov/CoverageSummary.cpp
new file mode 100644
index 000000000000..059c8c857e45
--- /dev/null
+++ b/tools/llvm-cov/CoverageSummary.cpp
@@ -0,0 +1,64 @@
+//===- CoverageSummary.cpp - Code coverage summary ------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This class implements data management and rendering for the code coverage
+// summaries of all files and functions.
+//
+//===----------------------------------------------------------------------===//
+
+#include "CoverageSummary.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/Format.h"
+
+using namespace llvm;
+
+unsigned CoverageSummary::getFileID(StringRef Filename) {
+  for (unsigned I = 0, E = Filenames.size(); I < E; ++I) {
+    if (sys::fs::equivalent(Filenames[I], Filename))
+      return I;
+  }
+  Filenames.push_back(Filename);
+  return Filenames.size() - 1;
+}
+
+void
+CoverageSummary::createSummaries(const coverage::CoverageMapping &Coverage) {
+  for (StringRef Filename : Coverage.getUniqueSourceFiles()) {
+    size_t PrevSize = FunctionSummaries.size();
+    for (const auto &F : Coverage.getCoveredFunctions(Filename))
+      FunctionSummaries.push_back(FunctionCoverageSummary::get(F));
+    size_t Count = FunctionSummaries.size() - PrevSize;
+    if (Count == 0)
+      continue;
+    FileSummaries.push_back(FileCoverageSummary::get(
+        Filename, makeArrayRef(FunctionSummaries.data() + PrevSize, Count)));
+  }
+}
+
+FileCoverageSummary CoverageSummary::getCombinedFileSummaries() {
+  size_t NumRegions = 0, CoveredRegions = 0;
+  size_t NumLines = 0, NonCodeLines = 0, CoveredLines = 0;
+  size_t NumFunctionsExecuted = 0, NumFunctions = 0;
+  for (const auto &File : FileSummaries) {
+    NumRegions += File.RegionCoverage.NumRegions;
+    CoveredRegions += File.RegionCoverage.Covered;
+
+    NumLines += File.LineCoverage.NumLines;
+    NonCodeLines += File.LineCoverage.NonCodeLines;
+    CoveredLines += File.LineCoverage.Covered;
+
+    NumFunctionsExecuted += File.FunctionCoverage.Executed;
+    NumFunctions += File.FunctionCoverage.NumFunctions;
+  }
+  return FileCoverageSummary(
+      "TOTAL", RegionCoverageInfo(CoveredRegions, NumRegions),
+      LineCoverageInfo(CoveredLines, NonCodeLines, NumLines),
+      FunctionCoverageInfo(NumFunctionsExecuted, NumFunctions),
+      None);
+}
diff --git a/tools/llvm-cov/CoverageSummary.h b/tools/llvm-cov/CoverageSummary.h
new file mode 100644
index 000000000000..9dbebde949e5
--- /dev/null
+++ b/tools/llvm-cov/CoverageSummary.h
@@ -0,0 +1,45 @@
+//===- CoverageSummary.h - Code coverage summary --------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This class implements data management and rendering for the code coverage
+// summaries of all files and functions.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_COV_COVERAGESUMMARY_H
+#define LLVM_COV_COVERAGESUMMARY_H
+
+#include "CoverageSummaryInfo.h"
+#include <vector>
+
+namespace llvm {
+
+/// \brief Manager for the function and file code coverage summaries.
+class CoverageSummary {
+  std::vector<StringRef> Filenames;
+  std::vector<FunctionCoverageSummary> FunctionSummaries;
+  std::vector<std::pair<unsigned, unsigned>> FunctionSummariesFileIDs;
+  std::vector<FileCoverageSummary> FileSummaries;
+
+  unsigned getFileID(StringRef Filename);
+
+public:
+  void createSummaries(const coverage::CoverageMapping &Coverage);
+
+  ArrayRef<FileCoverageSummary> getFileSummaries() { return FileSummaries; }
+
+  FileCoverageSummary getCombinedFileSummaries();
+
+  void render(const FunctionCoverageSummary &Summary, raw_ostream &OS);
+
+  void render(raw_ostream &OS);
+};
+}
+
+#endif // LLVM_COV_COVERAGESUMMARY_H
diff --git a/tools/llvm-cov/CoverageSummaryInfo.cpp b/tools/llvm-cov/CoverageSummaryInfo.cpp
new file mode 100644
index 000000000000..dd78ace86050
--- /dev/null
+++ b/tools/llvm-cov/CoverageSummaryInfo.cpp
@@ -0,0 +1,96 @@
+//===- CoverageSummaryInfo.cpp - Coverage summary for function/file -------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// These structures are used to represent code coverage metrics
+// for functions/files.
+//
+//===----------------------------------------------------------------------===//
+
+#include "CoverageSummaryInfo.h"
+
+using namespace llvm;
+using namespace coverage;
+
+FunctionCoverageSummary
+FunctionCoverageSummary::get(const coverage::FunctionRecord &Function) {
+  // Compute the region coverage
+  size_t NumCodeRegions = 0, CoveredRegions = 0;
+  for (auto &CR : Function.CountedRegions) {
+    if (CR.Kind != CounterMappingRegion::CodeRegion)
+      continue;
+    ++NumCodeRegions;
+    if (CR.ExecutionCount != 0)
+      ++CoveredRegions;
+  }
+
+  // Compute the line coverage
+  size_t NumLines = 0, CoveredLines = 0;
+  for (unsigned FileID = 0, E = Function.Filenames.size(); FileID < E;
+       ++FileID) {
+    // Find the line start and end of the function's source code
+    // in that particular file
+    unsigned LineStart = std::numeric_limits<unsigned>::max();
+    unsigned LineEnd = 0;
+    for (auto &CR : Function.CountedRegions) {
+      if (CR.FileID != FileID)
+        continue;
+      LineStart = std::min(LineStart, CR.LineStart);
+      LineEnd = std::max(LineEnd, CR.LineEnd);
+    }
+    unsigned LineCount = LineEnd - LineStart + 1;
+
+    // Get counters
+    llvm::SmallVector<uint64_t, 16> ExecutionCounts;
+    ExecutionCounts.resize(LineCount, 0);
+    for (auto &CR : Function.CountedRegions) {
+      if (CR.FileID != FileID)
+        continue;
+      // Ignore the lines that were skipped by the preprocessor.
+      auto ExecutionCount = CR.ExecutionCount;
+      if (CR.Kind == CounterMappingRegion::SkippedRegion) {
+        LineCount -= CR.LineEnd - CR.LineStart + 1;
+        ExecutionCount = 1;
+      }
+      for (unsigned I = CR.LineStart; I <= CR.LineEnd; ++I)
+        ExecutionCounts[I - LineStart] = ExecutionCount;
+    }
+    CoveredLines += LineCount - std::count(ExecutionCounts.begin(),
+                                           ExecutionCounts.end(), 0);
+    NumLines += LineCount;
+  }
+  return FunctionCoverageSummary(
+      Function.Name, Function.ExecutionCount,
+      RegionCoverageInfo(CoveredRegions, NumCodeRegions),
+      LineCoverageInfo(CoveredLines, 0, NumLines));
+}
+
+FileCoverageSummary
+FileCoverageSummary::get(StringRef Name,
+                         ArrayRef<FunctionCoverageSummary> FunctionSummaries) {
+  size_t NumRegions = 0, CoveredRegions = 0;
+  size_t NumLines = 0, NonCodeLines = 0, CoveredLines = 0;
+  size_t NumFunctionsExecuted = 0;
+  for (const auto &Func : FunctionSummaries) {
+    CoveredRegions += Func.RegionCoverage.Covered;
+    NumRegions += Func.RegionCoverage.NumRegions;
+
+    CoveredLines += Func.LineCoverage.Covered;
+    NonCodeLines += Func.LineCoverage.NonCodeLines;
+    NumLines += Func.LineCoverage.NumLines;
+
+    if (Func.ExecutionCount != 0)
+      ++NumFunctionsExecuted;
+  }
+
+  return FileCoverageSummary(
+      Name, RegionCoverageInfo(CoveredRegions, NumRegions),
+      LineCoverageInfo(CoveredLines, NonCodeLines, NumLines),
+      FunctionCoverageInfo(NumFunctionsExecuted, FunctionSummaries.size()),
+      FunctionSummaries);
+}
diff --git a/tools/llvm-cov/CoverageSummaryInfo.h b/tools/llvm-cov/CoverageSummaryInfo.h
new file mode 100644
index 000000000000..0036032ab399
--- /dev/null
+++ b/tools/llvm-cov/CoverageSummaryInfo.h
@@ -0,0 +1,133 @@
+//===- CoverageSummaryInfo.h - Coverage summary for function/file ---------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// These structures are used to represent code coverage metrics
+// for functions/files.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_COV_COVERAGESUMMARYINFO_H
+#define LLVM_COV_COVERAGESUMMARYINFO_H
+
+#include "llvm/ProfileData/CoverageMapping.h"
+#include "llvm/Support/raw_ostream.h"
+
+namespace llvm {
+
+/// \brief Provides information about region coverage for a function/file.
+struct RegionCoverageInfo {
+  /// \brief The number of regions that were executed at least once.
+  size_t Covered;
+
+  /// \brief The number of regions that weren't executed.
+  size_t NotCovered;
+
+  /// \brief The total number of regions in a function/file.
+  size_t NumRegions;
+
+  RegionCoverageInfo(size_t Covered, size_t NumRegions)
+      : Covered(Covered), NotCovered(NumRegions - Covered),
+        NumRegions(NumRegions) {}
+
+  bool isFullyCovered() const { return Covered == NumRegions; }
+
+  double getPercentCovered() const {
+    return double(Covered) / double(NumRegions) * 100.0;
+  }
+};
+
+/// \brief Provides information about line coverage for a function/file.
+struct LineCoverageInfo {
+  /// \brief The number of lines that were executed at least once.
+  size_t Covered;
+
+  /// \brief The number of lines that weren't executed.
+  size_t NotCovered;
+
+  /// \brief The number of lines that aren't code.
+  size_t NonCodeLines;
+
+  /// \brief The total number of lines in a function/file.
+  size_t NumLines;
+
+  LineCoverageInfo(size_t Covered, size_t NumNonCodeLines, size_t NumLines)
+      : Covered(Covered), NotCovered(NumLines - NumNonCodeLines - Covered),
+        NonCodeLines(NumNonCodeLines), NumLines(NumLines) {}
+
+  bool isFullyCovered() const { return Covered == (NumLines - NonCodeLines); }
+
+  double getPercentCovered() const {
+    return double(Covered) / double(NumLines - NonCodeLines) * 100.0;
+  }
+};
+
+/// \brief Provides information about function coverage for a file.
+struct FunctionCoverageInfo {
+  /// \brief The number of functions that were executed.
+  size_t Executed;
+
+  /// \brief The total number of functions in this file.
+  size_t NumFunctions;
+
+  FunctionCoverageInfo(size_t Executed, size_t NumFunctions)
+      : Executed(Executed), NumFunctions(NumFunctions) {}
+
+  bool isFullyCovered() const { return Executed == NumFunctions; }
+
+  double getPercentCovered() const {
+    return double(Executed) / double(NumFunctions) * 100.0;
+  }
+};
+
+/// \brief A summary of function's code coverage.
+struct FunctionCoverageSummary {
+  StringRef Name;
+  uint64_t ExecutionCount;
+  RegionCoverageInfo RegionCoverage;
+  LineCoverageInfo LineCoverage;
+
+  FunctionCoverageSummary(StringRef Name, uint64_t ExecutionCount,
+                          const RegionCoverageInfo &RegionCoverage,
+                          const LineCoverageInfo &LineCoverage)
+      : Name(Name), ExecutionCount(ExecutionCount),
+        RegionCoverage(RegionCoverage), LineCoverage(LineCoverage) {
+  }
+
+  /// \brief Compute the code coverage summary for the given function coverage
+  /// mapping record.
+  static FunctionCoverageSummary
+  get(const coverage::FunctionRecord &Function);
+};
+
+/// \brief A summary of file's code coverage.
+struct FileCoverageSummary {
+  StringRef Name;
+  RegionCoverageInfo RegionCoverage;
+  LineCoverageInfo LineCoverage;
+  FunctionCoverageInfo FunctionCoverage;
+  /// \brief The summary of every function
+  /// in this file.
+  ArrayRef<FunctionCoverageSummary> FunctionSummaries;
+
+  FileCoverageSummary(StringRef Name, const RegionCoverageInfo &RegionCoverage,
+                      const LineCoverageInfo &LineCoverage,
+                      const FunctionCoverageInfo &FunctionCoverage,
+                      ArrayRef<FunctionCoverageSummary> FunctionSummaries)
+      : Name(Name), RegionCoverage(RegionCoverage), LineCoverage(LineCoverage),
+        FunctionCoverage(FunctionCoverage),
+        FunctionSummaries(FunctionSummaries) {}
+
+  /// \brief Compute the code coverage summary for a file.
+  static FileCoverageSummary
+  get(StringRef Name, ArrayRef<FunctionCoverageSummary> FunctionSummaries);
+};
+
+} // namespace llvm
+
+#endif // LLVM_COV_COVERAGESUMMARYINFO_H
diff --git a/tools/llvm-cov/CoverageViewOptions.h b/tools/llvm-cov/CoverageViewOptions.h
new file mode 100644
index 000000000000..94b55fe793fc
--- /dev/null
+++ b/tools/llvm-cov/CoverageViewOptions.h
@@ -0,0 +1,36 @@
+//===- CoverageViewOptions.h - Code coverage display options -------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_COV_COVERAGEVIEWOPTIONS_H
+#define LLVM_COV_COVERAGEVIEWOPTIONS_H
+
+#include "RenderingSupport.h"
+
+namespace llvm {
+
+/// \brief The options for displaying the code coverage information.
+struct CoverageViewOptions {
+  bool Debug;
+  bool Colors;
+  bool ShowLineNumbers;
+  bool ShowLineStats;
+  bool ShowRegionMarkers;
+  bool ShowLineStatsOrRegionMarkers;
+  bool ShowExpandedRegions;
+  bool ShowFunctionInstantiations;
+
+  /// \brief Change the output's stream color if the colors are enabled.
+  ColoredRawOstream colored_ostream(raw_ostream &OS,
+                                    raw_ostream::Colors Color) const {
+    return llvm::colored_ostream(OS, Color, Colors);
+  }
+};
+}
+
+#endif // LLVM_COV_COVERAGEVIEWOPTIONS_H
diff --git a/tools/llvm-cov/LLVMBuild.txt b/tools/llvm-cov/LLVMBuild.txt
index 87e00d170f90..d6eb74de0d4b 100644
--- a/tools/llvm-cov/LLVMBuild.txt
+++ b/tools/llvm-cov/LLVMBuild.txt
@@ -19,4 +19,4 @@
 type = Tool
 name = llvm-cov
 parent = Tools
-required_libraries = Instrumentation
+required_libraries = ProfileData Support Instrumentation
diff --git a/tools/llvm-cov/Makefile b/tools/llvm-cov/Makefile
index efed6cc7942e..6e32b4d233d7 100644
--- a/tools/llvm-cov/Makefile
+++ b/tools/llvm-cov/Makefile
@@ -9,7 +9,7 @@
 
 LEVEL := ../..
 TOOLNAME := llvm-cov
-LINK_COMPONENTS := core support
+LINK_COMPONENTS := core support profiledata object
 
 # This tool has no plugins, optimize startup time.
 TOOL_NO_EXPORTS := 1
diff --git a/tools/llvm-cov/RenderingSupport.h b/tools/llvm-cov/RenderingSupport.h
new file mode 100644
index 000000000000..0271329997dc
--- /dev/null
+++ b/tools/llvm-cov/RenderingSupport.h
@@ -0,0 +1,60 @@
+//===- RenderingSupport.h - output stream rendering support functions  ----===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_COV_RENDERINGSUPPORT_H
+#define LLVM_COV_RENDERINGSUPPORT_H
+
+#include "llvm/Support/raw_ostream.h"
+#include <utility>
+
+namespace llvm {
+
+/// \brief A helper class that resets the output stream's color if needed
+/// when destroyed.
+class ColoredRawOstream {
+  ColoredRawOstream(const ColoredRawOstream &OS) LLVM_DELETED_FUNCTION;
+
+public:
+  raw_ostream &OS;
+  bool IsColorUsed;
+
+  ColoredRawOstream(raw_ostream &OS, bool IsColorUsed)
+      : OS(OS), IsColorUsed(IsColorUsed) {}
+
+  ColoredRawOstream(ColoredRawOstream &&Other)
+      : OS(Other.OS), IsColorUsed(Other.IsColorUsed) {
+    // Reset the other IsColorUsed so that the other object won't reset the
+    // color when destroyed.
+    Other.IsColorUsed = false;
+  }
+
+  ~ColoredRawOstream() {
+    if (IsColorUsed)
+      OS.resetColor();
+  }
+};
+
+template <typename T>
+inline raw_ostream &operator<<(const ColoredRawOstream &OS, T &&Value) {
+  return OS.OS << std::forward<T>(Value);
+}
+
+/// \brief Change the color of the output stream if the `IsColorUsed` flag
+/// is true. Returns an object that resets the color when destroyed.
+inline ColoredRawOstream colored_ostream(raw_ostream &OS,
+                                         raw_ostream::Colors Color,
+                                         bool IsColorUsed = true,
+                                         bool Bold = false, bool BG = false) {
+  if (IsColorUsed)
+    OS.changeColor(Color, Bold, BG);
+  return ColoredRawOstream(OS, IsColorUsed);
+}
+}
+
+#endif // LLVM_COV_RENDERINGSUPPORT_H
diff --git a/tools/llvm-cov/SourceCoverageView.cpp b/tools/llvm-cov/SourceCoverageView.cpp
new file mode 100644
index 000000000000..015099c7d02b
--- /dev/null
+++ b/tools/llvm-cov/SourceCoverageView.cpp
@@ -0,0 +1,260 @@
+//===- SourceCoverageView.cpp - Code coverage view for source code --------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This class implements rendering for code coverage of source code.
+//
+//===----------------------------------------------------------------------===//
+
+#include "SourceCoverageView.h"
+#include "llvm/ADT/Optional.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/Support/LineIterator.h"
+
+using namespace llvm;
+
+void SourceCoverageView::renderLine(
+    raw_ostream &OS, StringRef Line, int64_t LineNumber,
+    const coverage::CoverageSegment *WrappedSegment,
+    ArrayRef<const coverage::CoverageSegment *> Segments,
+    unsigned ExpansionCol) {
+  Optional<raw_ostream::Colors> Highlight;
+  SmallVector<std::pair<unsigned, unsigned>, 2> HighlightedRanges;
+
+  // The first segment overlaps from a previous line, so we treat it specially.
+  if (WrappedSegment && WrappedSegment->HasCount && WrappedSegment->Count == 0)
+    Highlight = raw_ostream::RED;
+
+  // Output each segment of the line, possibly highlighted.
+  unsigned Col = 1;
+  for (const auto *S : Segments) {
+    unsigned End = std::min(S->Col, static_cast<unsigned>(Line.size()) + 1);
+    colored_ostream(OS, Highlight ? *Highlight : raw_ostream::SAVEDCOLOR,
+                    Options.Colors && Highlight, /*Bold=*/false, /*BG=*/true)
+        << Line.substr(Col - 1, End - Col);
+    if (Options.Debug && Highlight)
+      HighlightedRanges.push_back(std::make_pair(Col, End));
+    Col = End;
+    if (Col == ExpansionCol)
+      Highlight = raw_ostream::CYAN;
+    else if (S->HasCount && S->Count == 0)
+      Highlight = raw_ostream::RED;
+    else
+      Highlight = None;
+  }
+
+  // Show the rest of the line
+  colored_ostream(OS, Highlight ? *Highlight : raw_ostream::SAVEDCOLOR,
+                  Options.Colors && Highlight, /*Bold=*/false, /*BG=*/true)
+      << Line.substr(Col - 1, Line.size() - Col + 1);
+  OS << "\n";
+
+  if (Options.Debug) {
+    for (const auto &Range : HighlightedRanges)
+      errs() << "Highlighted line " << LineNumber << ", " << Range.first
+             << " -> " << Range.second << "\n";
+    if (Highlight)
+      errs() << "Highlighted line " << LineNumber << ", " << Col << " -> ?\n";
+  }
+}
+
+void SourceCoverageView::renderIndent(raw_ostream &OS, unsigned Level) {
+  for (unsigned I = 0; I < Level; ++I)
+    OS << "  |";
+}
+
+void SourceCoverageView::renderViewDivider(unsigned Level, unsigned Length,
+                                           raw_ostream &OS) {
+  assert(Level != 0 && "Cannot render divider at top level");
+  renderIndent(OS, Level - 1);
+  OS.indent(2);
+  for (unsigned I = 0; I < Length; ++I)
+    OS << "-";
+}
+
+void
+SourceCoverageView::renderLineCoverageColumn(raw_ostream &OS,
+                                             const LineCoverageInfo &Line) {
+  if (!Line.isMapped()) {
+    OS.indent(LineCoverageColumnWidth) << '|';
+    return;
+  }
+  SmallString<32> Buffer;
+  raw_svector_ostream BufferOS(Buffer);
+  BufferOS << Line.ExecutionCount;
+  auto Str = BufferOS.str();
+  // Trim
+  Str = Str.substr(0, std::min(Str.size(), (size_t)LineCoverageColumnWidth));
+  // Align to the right
+  OS.indent(LineCoverageColumnWidth - Str.size());
+  colored_ostream(OS, raw_ostream::MAGENTA,
+                  Line.hasMultipleRegions() && Options.Colors)
+      << Str;
+  OS << '|';
+}
+
+void SourceCoverageView::renderLineNumberColumn(raw_ostream &OS,
+                                                unsigned LineNo) {
+  SmallString<32> Buffer;
+  raw_svector_ostream BufferOS(Buffer);
+  BufferOS << LineNo;
+  auto Str = BufferOS.str();
+  // Trim and align to the right
+  Str = Str.substr(0, std::min(Str.size(), (size_t)LineNumberColumnWidth));
+  OS.indent(LineNumberColumnWidth - Str.size()) << Str << '|';
+}
+
+void SourceCoverageView::renderRegionMarkers(
+    raw_ostream &OS, ArrayRef<const coverage::CoverageSegment *> Segments) {
+  SmallString<32> Buffer;
+  raw_svector_ostream BufferOS(Buffer);
+
+  unsigned PrevColumn = 1;
+  for (const auto *S : Segments) {
+    if (!S->IsRegionEntry)
+      continue;
+    // Skip to the new region
+    if (S->Col > PrevColumn)
+      OS.indent(S->Col - PrevColumn);
+    PrevColumn = S->Col + 1;
+    BufferOS << S->Count;
+    StringRef Str = BufferOS.str();
+    // Trim the execution count
+    Str = Str.substr(0, std::min(Str.size(), (size_t)7));
+    PrevColumn += Str.size();
+    OS << '^' << Str;
+    Buffer.clear();
+  }
+  OS << "\n";
+
+  if (Options.Debug)
+    for (const auto *S : Segments)
+      errs() << "Marker at " << S->Line << ":" << S->Col << " = " << S->Count
+             << (S->IsRegionEntry ? "\n" : " (pop)\n");
+}
+
+void SourceCoverageView::render(raw_ostream &OS, bool WholeFile,
+                                unsigned IndentLevel) {
+  // The width of the leading columns
+  unsigned CombinedColumnWidth =
+      (Options.ShowLineStats ? LineCoverageColumnWidth + 1 : 0) +
+      (Options.ShowLineNumbers ? LineNumberColumnWidth + 1 : 0);
+  // The width of the line that is used to divide between the view and the
+  // subviews.
+  unsigned DividerWidth = CombinedColumnWidth + 4;
+
+  // We need the expansions and instantiations sorted so we can go through them
+  // while we iterate lines.
+  std::sort(ExpansionSubViews.begin(), ExpansionSubViews.end());
+  std::sort(InstantiationSubViews.begin(), InstantiationSubViews.end());
+  auto NextESV = ExpansionSubViews.begin();
+  auto EndESV = ExpansionSubViews.end();
+  auto NextISV = InstantiationSubViews.begin();
+  auto EndISV = InstantiationSubViews.end();
+
+  // Get the coverage information for the file.
+  auto NextSegment = CoverageInfo.begin();
+  auto EndSegment = CoverageInfo.end();
+
+  unsigned FirstLine = NextSegment != EndSegment ? NextSegment->Line : 0;
+  const coverage::CoverageSegment *WrappedSegment = nullptr;
+  SmallVector<const coverage::CoverageSegment *, 8> LineSegments;
+  for (line_iterator LI(File, /*SkipBlanks=*/false); !LI.is_at_eof(); ++LI) {
+    // If we aren't rendering the whole file, we need to filter out the prologue
+    // and epilogue.
+    if (!WholeFile) {
+      if (NextSegment == EndSegment)
+        break;
+      else if (LI.line_number() < FirstLine)
+        continue;
+    }
+
+    // Collect the coverage information relevant to this line.
+    if (LineSegments.size())
+      WrappedSegment = LineSegments.back();
+    LineSegments.clear();
+    while (NextSegment != EndSegment && NextSegment->Line == LI.line_number())
+      LineSegments.push_back(&*NextSegment++);
+
+    // Calculate a count to be for the line as a whole.
+    LineCoverageInfo LineCount;
+    if (WrappedSegment && WrappedSegment->HasCount)
+      LineCount.addRegionCount(WrappedSegment->Count);
+    for (const auto *S : LineSegments)
+      if (S->HasCount && S->IsRegionEntry)
+          LineCount.addRegionStartCount(S->Count);
+
+    // Render the line prefix.
+    renderIndent(OS, IndentLevel);
+    if (Options.ShowLineStats)
+      renderLineCoverageColumn(OS, LineCount);
+    if (Options.ShowLineNumbers)
+      renderLineNumberColumn(OS, LI.line_number());
+
+    // If there are expansion subviews, we want to highlight the first one.
+    unsigned ExpansionColumn = 0;
+    if (NextESV != EndESV && NextESV->getLine() == LI.line_number() &&
+        Options.Colors)
+      ExpansionColumn = NextESV->getStartCol();
+
+    // Display the source code for the current line.
+    renderLine(OS, *LI, LI.line_number(), WrappedSegment, LineSegments,
+               ExpansionColumn);
+
+    // Show the region markers.
+    if (Options.ShowRegionMarkers && (!Options.ShowLineStatsOrRegionMarkers ||
+                                      LineCount.hasMultipleRegions()) &&
+        !LineSegments.empty()) {
+      renderIndent(OS, IndentLevel);
+      OS.indent(CombinedColumnWidth);
+      renderRegionMarkers(OS, LineSegments);
+    }
+
+    // Show the expansions and instantiations for this line.
+    unsigned NestedIndent = IndentLevel + 1;
+    bool RenderedSubView = false;
+    for (; NextESV != EndESV && NextESV->getLine() == LI.line_number();
+         ++NextESV) {
+      renderViewDivider(NestedIndent, DividerWidth, OS);
+      OS << "\n";
+      if (RenderedSubView) {
+        // Re-render the current line and highlight the expansion range for
+        // this subview.
+        ExpansionColumn = NextESV->getStartCol();
+        renderIndent(OS, IndentLevel);
+        OS.indent(CombinedColumnWidth + (IndentLevel == 0 ? 0 : 1));
+        renderLine(OS, *LI, LI.line_number(), WrappedSegment, LineSegments,
+                   ExpansionColumn);
+        renderViewDivider(NestedIndent, DividerWidth, OS);
+        OS << "\n";
+      }
+      // Render the child subview
+      if (Options.Debug)
+        errs() << "Expansion at line " << NextESV->getLine() << ", "
+               << NextESV->getStartCol() << " -> " << NextESV->getEndCol()
+               << "\n";
+      NextESV->View->render(OS, false, NestedIndent);
+      RenderedSubView = true;
+    }
+    for (; NextISV != EndISV && NextISV->Line == LI.line_number(); ++NextISV) {
+      renderViewDivider(NestedIndent, DividerWidth, OS);
+      OS << "\n";
+      renderIndent(OS, NestedIndent);
+      OS << ' ';
+      Options.colored_ostream(OS, raw_ostream::CYAN) << NextISV->FunctionName
+                                                     << ":";
+      OS << "\n";
+      NextISV->View->render(OS, false, NestedIndent);
+      RenderedSubView = true;
+    }
+    if (RenderedSubView) {
+      renderViewDivider(NestedIndent, DividerWidth, OS);
+      OS << "\n";
+    }
+  }
+}
diff --git a/tools/llvm-cov/SourceCoverageView.h b/tools/llvm-cov/SourceCoverageView.h
new file mode 100644
index 000000000000..d92a7486d9d3
--- /dev/null
+++ b/tools/llvm-cov/SourceCoverageView.h
@@ -0,0 +1,162 @@
+//===- SourceCoverageView.h - Code coverage view for source code ----------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This class implements rendering for code coverage of source code.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_COV_SOURCECOVERAGEVIEW_H
+#define LLVM_COV_SOURCECOVERAGEVIEW_H
+
+#include "CoverageViewOptions.h"
+#include "llvm/ProfileData/CoverageMapping.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include <vector>
+
+namespace llvm {
+
+class SourceCoverageView;
+
+/// \brief A view that represents a macro or include expansion
+struct ExpansionView {
+  coverage::CounterMappingRegion Region;
+  std::unique_ptr<SourceCoverageView> View;
+
+  ExpansionView(const coverage::CounterMappingRegion &Region,
+                std::unique_ptr<SourceCoverageView> View)
+      : Region(Region), View(std::move(View)) {}
+  ExpansionView(ExpansionView &&RHS)
+      : Region(std::move(RHS.Region)), View(std::move(RHS.View)) {}
+  ExpansionView &operator=(ExpansionView &&RHS) {
+    Region = std::move(RHS.Region);
+    View = std::move(RHS.View);
+    return *this;
+  }
+
+  unsigned getLine() const { return Region.LineStart; }
+  unsigned getStartCol() const { return Region.ColumnStart; }
+  unsigned getEndCol() const { return Region.ColumnEnd; }
+
+  friend bool operator<(const ExpansionView &LHS, const ExpansionView &RHS) {
+    return LHS.Region.startLoc() < RHS.Region.startLoc();
+  }
+};
+
+/// \brief A view that represents a function instantiation
+struct InstantiationView {
+  StringRef FunctionName;
+  unsigned Line;
+  std::unique_ptr<SourceCoverageView> View;
+
+  InstantiationView(StringRef FunctionName, unsigned Line,
+                    std::unique_ptr<SourceCoverageView> View)
+      : FunctionName(FunctionName), Line(Line), View(std::move(View)) {}
+  InstantiationView(InstantiationView &&RHS)
+      : FunctionName(std::move(RHS.FunctionName)), Line(std::move(RHS.Line)),
+        View(std::move(RHS.View)) {}
+  InstantiationView &operator=(InstantiationView &&RHS) {
+    FunctionName = std::move(RHS.FunctionName);
+    Line = std::move(RHS.Line);
+    View = std::move(RHS.View);
+    return *this;
+  }
+
+  friend bool operator<(const InstantiationView &LHS,
+                        const InstantiationView &RHS) {
+    return LHS.Line < RHS.Line;
+  }
+};
+
+/// \brief A code coverage view of a specific source file.
+/// It can have embedded coverage views.
+class SourceCoverageView {
+private:
+  /// \brief Coverage information for a single line.
+  struct LineCoverageInfo {
+    uint64_t ExecutionCount;
+    unsigned RegionCount;
+    bool Mapped;
+
+    LineCoverageInfo() : ExecutionCount(0), RegionCount(0), Mapped(false) {}
+
+    bool isMapped() const { return Mapped; }
+
+    bool hasMultipleRegions() const { return RegionCount > 1; }
+
+    void addRegionStartCount(uint64_t Count) {
+      Mapped = true;
+      ExecutionCount = Count;
+      ++RegionCount;
+    }
+
+    void addRegionCount(uint64_t Count) {
+      Mapped = true;
+      if (!RegionCount)
+        ExecutionCount = Count;
+    }
+  };
+
+  const MemoryBuffer &File;
+  const CoverageViewOptions &Options;
+  coverage::CoverageData CoverageInfo;
+  std::vector<ExpansionView> ExpansionSubViews;
+  std::vector<InstantiationView> InstantiationSubViews;
+
+  /// \brief Render a source line with highlighting.
+  void renderLine(raw_ostream &OS, StringRef Line, int64_t LineNumber,
+                  const coverage::CoverageSegment *WrappedSegment,
+                  ArrayRef<const coverage::CoverageSegment *> Segments,
+                  unsigned ExpansionCol);
+
+  void renderIndent(raw_ostream &OS, unsigned Level);
+
+  void renderViewDivider(unsigned Offset, unsigned Length, raw_ostream &OS);
+
+  /// \brief Render the line's execution count column.
+  void renderLineCoverageColumn(raw_ostream &OS, const LineCoverageInfo &Line);
+
+  /// \brief Render the line number column.
+  void renderLineNumberColumn(raw_ostream &OS, unsigned LineNo);
+
+  /// \brief Render all the region's execution counts on a line.
+  void
+  renderRegionMarkers(raw_ostream &OS,
+                      ArrayRef<const coverage::CoverageSegment *> Segments);
+
+  static const unsigned LineCoverageColumnWidth = 7;
+  static const unsigned LineNumberColumnWidth = 5;
+
+public:
+  SourceCoverageView(const MemoryBuffer &File,
+                     const CoverageViewOptions &Options,
+                     coverage::CoverageData &&CoverageInfo)
+      : File(File), Options(Options), CoverageInfo(std::move(CoverageInfo)) {}
+
+  const CoverageViewOptions &getOptions() const { return Options; }
+
+  /// \brief Add an expansion subview to this view.
+  void addExpansion(const coverage::CounterMappingRegion &Region,
+                    std::unique_ptr<SourceCoverageView> View) {
+    ExpansionSubViews.emplace_back(Region, std::move(View));
+  }
+
+  /// \brief Add a function instantiation subview to this view.
+  void addInstantiation(StringRef FunctionName, unsigned Line,
+                        std::unique_ptr<SourceCoverageView> View) {
+    InstantiationSubViews.emplace_back(FunctionName, Line, std::move(View));
+  }
+
+  /// \brief Print the code coverage information for a specific
+  /// portion of a source file to the output stream.
+  void render(raw_ostream &OS, bool WholeFile, unsigned IndentLevel = 0);
+};
+
+} // namespace llvm
+
+#endif // LLVM_COV_SOURCECOVERAGEVIEW_H
diff --git a/tools/llvm-cov/TestingSupport.cpp b/tools/llvm-cov/TestingSupport.cpp
new file mode 100644
index 000000000000..6959897482ca
--- /dev/null
+++ b/tools/llvm-cov/TestingSupport.cpp
@@ -0,0 +1,90 @@
+//===- TestingSupport.cpp - Convert objects files into test files --------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Object/ObjectFile.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/LEB128.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/Signals.h"
+#include "llvm/Support/raw_ostream.h"
+#include <functional>
+#include <system_error>
+
+using namespace llvm;
+using namespace object;
+
+int convertForTestingMain(int argc, const char *argv[]) {
+  sys::PrintStackTraceOnErrorSignal();
+  PrettyStackTraceProgram X(argc, argv);
+  llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
+
+  cl::opt<std::string> InputSourceFile(cl::Positional, cl::Required,
+                                       cl::desc("<Source file>"));
+
+  cl::opt<std::string> OutputFilename(
+      "o", cl::Required,
+      cl::desc(
+          "File with the profile data obtained after an instrumented run"));
+
+  cl::ParseCommandLineOptions(argc, argv, "LLVM code coverage tool\n");
+
+  auto ObjErr = llvm::object::ObjectFile::createObjectFile(InputSourceFile);
+  if (auto Err = ObjErr.getError()) {
+    errs() << "error: " << Err.message() << "\n";
+    return 1;
+  }
+  ObjectFile *OF = ObjErr.get().getBinary();
+  auto BytesInAddress = OF->getBytesInAddress();
+  if (BytesInAddress != 8) {
+    errs() << "error: 64 bit binary expected\n";
+    return 1;
+  }
+
+  // Look for the sections that we are interested in.
+  int FoundSectionCount = 0;
+  SectionRef ProfileNames, CoverageMapping;
+  for (const auto &Section : OF->sections()) {
+    StringRef Name;
+    if (Section.getName(Name))
+      return 1;
+    if (Name == "__llvm_prf_names") {
+      ProfileNames = Section;
+    } else if (Name == "__llvm_covmap") {
+      CoverageMapping = Section;
+    } else
+      continue;
+    ++FoundSectionCount;
+  }
+  if (FoundSectionCount != 2)
+    return 1;
+
+  // Get the contents of the given sections.
+  uint64_t ProfileNamesAddress = ProfileNames.getAddress();
+  StringRef CoverageMappingData;
+  StringRef ProfileNamesData;
+  if (CoverageMapping.getContents(CoverageMappingData) ||
+      ProfileNames.getContents(ProfileNamesData))
+    return 1;
+
+  int FD;
+  if (auto Err =
+          sys::fs::openFileForWrite(OutputFilename, FD, sys::fs::F_None)) {
+    errs() << "error: " << Err.message() << "\n";
+    return 1;
+  }
+
+  raw_fd_ostream OS(FD, true);
+  OS << "llvmcovmtestdata";
+  encodeULEB128(ProfileNamesData.size(), OS);
+  encodeULEB128(ProfileNamesAddress, OS);
+  OS << ProfileNamesData << CoverageMappingData;
+
+  return 0;
+}
diff --git a/tools/llvm-cov/gcov.cpp b/tools/llvm-cov/gcov.cpp
new file mode 100644
index 000000000000..12011cea7f26
--- /dev/null
+++ b/tools/llvm-cov/gcov.cpp
@@ -0,0 +1,152 @@
+//===- gcov.cpp - GCOV compatible LLVM coverage tool ----------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// llvm-cov is a command line tools to analyze and report coverage information.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/SmallString.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Errc.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/GCOV.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/Path.h"
+#include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/Signals.h"
+#include <system_error>
+using namespace llvm;
+
+void reportCoverage(StringRef SourceFile, StringRef ObjectDir,
+                    const std::string &InputGCNO, const std::string &InputGCDA,
+                    bool DumpGCOV, const GCOVOptions &Options) {
+  SmallString<128> CoverageFileStem(ObjectDir);
+  if (CoverageFileStem.empty()) {
+    // If no directory was specified with -o, look next to the source file.
+    CoverageFileStem = sys::path::parent_path(SourceFile);
+    sys::path::append(CoverageFileStem, sys::path::stem(SourceFile));
+  } else if (sys::fs::is_directory(ObjectDir))
+    // A directory name was given. Use it and the source file name.
+    sys::path::append(CoverageFileStem, sys::path::stem(SourceFile));
+  else
+    // A file was given. Ignore the source file and look next to this file.
+    sys::path::replace_extension(CoverageFileStem, "");
+
+  std::string GCNO = InputGCNO.empty()
+                         ? std::string(CoverageFileStem.str()) + ".gcno"
+                         : InputGCNO;
+  std::string GCDA = InputGCDA.empty()
+                         ? std::string(CoverageFileStem.str()) + ".gcda"
+                         : InputGCDA;
+  GCOVFile GF;
+
+  ErrorOr<std::unique_ptr<MemoryBuffer>> GCNO_Buff =
+      MemoryBuffer::getFileOrSTDIN(GCNO);
+  if (std::error_code EC = GCNO_Buff.getError()) {
+    errs() << GCNO << ": " << EC.message() << "\n";
+    return;
+  }
+  GCOVBuffer GCNO_GB(GCNO_Buff.get().get());
+  if (!GF.readGCNO(GCNO_GB)) {
+    errs() << "Invalid .gcno File!\n";
+    return;
+  }
+
+  ErrorOr<std::unique_ptr<MemoryBuffer>> GCDA_Buff =
+      MemoryBuffer::getFileOrSTDIN(GCDA);
+  if (std::error_code EC = GCDA_Buff.getError()) {
+    if (EC != errc::no_such_file_or_directory) {
+      errs() << GCDA << ": " << EC.message() << "\n";
+      return;
+    }
+    // Clear the filename to make it clear we didn't read anything.
+    GCDA = "-";
+  } else {
+    GCOVBuffer GCDA_GB(GCDA_Buff.get().get());
+    if (!GF.readGCDA(GCDA_GB)) {
+      errs() << "Invalid .gcda File!\n";
+      return;
+    }
+  }
+
+  if (DumpGCOV)
+    GF.dump();
+
+  FileInfo FI(Options);
+  GF.collectLineCounts(FI);
+  FI.print(SourceFile, GCNO, GCDA);
+}
+
+int gcovMain(int argc, const char *argv[]) {
+  // Print a stack trace if we signal out.
+  sys::PrintStackTraceOnErrorSignal();
+  PrettyStackTraceProgram X(argc, argv);
+  llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
+
+  cl::list<std::string> SourceFiles(cl::Positional, cl::OneOrMore,
+                                    cl::desc("SOURCEFILE"));
+
+  cl::opt<bool> AllBlocks("a", cl::Grouping, cl::init(false),
+                          cl::desc("Display all basic blocks"));
+  cl::alias AllBlocksA("all-blocks", cl::aliasopt(AllBlocks));
+
+  cl::opt<bool> BranchProb("b", cl::Grouping, cl::init(false),
+                           cl::desc("Display branch probabilities"));
+  cl::alias BranchProbA("branch-probabilities", cl::aliasopt(BranchProb));
+
+  cl::opt<bool> BranchCount("c", cl::Grouping, cl::init(false),
+                            cl::desc("Display branch counts instead "
+                                     "of percentages (requires -b)"));
+  cl::alias BranchCountA("branch-counts", cl::aliasopt(BranchCount));
+
+  cl::opt<bool> LongNames("l", cl::Grouping, cl::init(false),
+                          cl::desc("Prefix filenames with the main file"));
+  cl::alias LongNamesA("long-file-names", cl::aliasopt(LongNames));
+
+  cl::opt<bool> FuncSummary("f", cl::Grouping, cl::init(false),
+                            cl::desc("Show coverage for each function"));
+  cl::alias FuncSummaryA("function-summaries", cl::aliasopt(FuncSummary));
+
+  cl::opt<bool> NoOutput("n", cl::Grouping, cl::init(false),
+                         cl::desc("Do not output any .gcov files"));
+  cl::alias NoOutputA("no-output", cl::aliasopt(NoOutput));
+
+  cl::opt<std::string> ObjectDir(
+      "o", cl::value_desc("DIR|FILE"), cl::init(""),
+      cl::desc("Find objects in DIR or based on FILE's path"));
+  cl::alias ObjectDirA("object-directory", cl::aliasopt(ObjectDir));
+  cl::alias ObjectDirB("object-file", cl::aliasopt(ObjectDir));
+
+  cl::opt<bool> PreservePaths("p", cl::Grouping, cl::init(false),
+                              cl::desc("Preserve path components"));
+  cl::alias PreservePathsA("preserve-paths", cl::aliasopt(PreservePaths));
+
+  cl::opt<bool> UncondBranch("u", cl::Grouping, cl::init(false),
+                             cl::desc("Display unconditional branch info "
+                                      "(requires -b)"));
+  cl::alias UncondBranchA("unconditional-branches", cl::aliasopt(UncondBranch));
+
+  cl::OptionCategory DebugCat("Internal and debugging options");
+  cl::opt<bool> DumpGCOV("dump", cl::init(false), cl::cat(DebugCat),
+                         cl::desc("Dump the gcov file to stderr"));
+  cl::opt<std::string> InputGCNO("gcno", cl::cat(DebugCat), cl::init(""),
+                                 cl::desc("Override inferred gcno file"));
+  cl::opt<std::string> InputGCDA("gcda", cl::cat(DebugCat), cl::init(""),
+                                 cl::desc("Override inferred gcda file"));
+
+  cl::ParseCommandLineOptions(argc, argv, "LLVM code coverage tool\n");
+
+  GCOVOptions Options(AllBlocks, BranchProb, BranchCount, FuncSummary,
+                      PreservePaths, UncondBranch, LongNames, NoOutput);
+
+  for (const auto &SourceFile : SourceFiles)
+    reportCoverage(SourceFile, ObjectDir, InputGCNO, InputGCDA, DumpGCOV,
+                   Options);
+  return 0;
+}
diff --git a/tools/llvm-cov/llvm-cov.cpp b/tools/llvm-cov/llvm-cov.cpp
index 18cc1b110e23..86ec26dbd188 100644
--- a/tools/llvm-cov/llvm-cov.cpp
+++ b/tools/llvm-cov/llvm-cov.cpp
@@ -11,140 +11,68 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/ADT/SmallString.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/Errc.h"
-#include "llvm/Support/FileSystem.h"
-#include "llvm/Support/GCOV.h"
-#include "llvm/Support/ManagedStatic.h"
-#include "llvm/Support/MemoryObject.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/StringSwitch.h"
 #include "llvm/Support/Path.h"
-#include "llvm/Support/PrettyStackTrace.h"
-#include "llvm/Support/Signals.h"
-#include <system_error>
-using namespace llvm;
-
-static cl::list<std::string> SourceFiles(cl::Positional, cl::OneOrMore,
-                                         cl::desc("SOURCEFILE"));
-
-static cl::opt<bool> AllBlocks("a", cl::Grouping, cl::init(false),
-                               cl::desc("Display all basic blocks"));
-static cl::alias AllBlocksA("all-blocks", cl::aliasopt(AllBlocks));
-
-static cl::opt<bool> BranchProb("b", cl::Grouping, cl::init(false),
-                                cl::desc("Display branch probabilities"));
-static cl::alias BranchProbA("branch-probabilities", cl::aliasopt(BranchProb));
-
-static cl::opt<bool> BranchCount("c", cl::Grouping, cl::init(false),
-                                 cl::desc("Display branch counts instead "
-                                           "of percentages (requires -b)"));
-static cl::alias BranchCountA("branch-counts", cl::aliasopt(BranchCount));
-
-static cl::opt<bool> LongNames("l", cl::Grouping, cl::init(false),
-                               cl::desc("Prefix filenames with the main file"));
-static cl::alias LongNamesA("long-file-names", cl::aliasopt(LongNames));
+#include "llvm/Support/raw_ostream.h"
+#include <string>
 
-static cl::opt<bool> FuncSummary("f", cl::Grouping, cl::init(false),
-                                 cl::desc("Show coverage for each function"));
-static cl::alias FuncSummaryA("function-summaries", cl::aliasopt(FuncSummary));
-
-static cl::opt<bool> NoOutput("n", cl::Grouping, cl::init(false),
-                              cl::desc("Do not output any .gcov files"));
-static cl::alias NoOutputA("no-output", cl::aliasopt(NoOutput));
-
-static cl::opt<std::string>
-ObjectDir("o", cl::value_desc("DIR|FILE"), cl::init(""),
-          cl::desc("Find objects in DIR or based on FILE's path"));
-static cl::alias ObjectDirA("object-directory", cl::aliasopt(ObjectDir));
-static cl::alias ObjectDirB("object-file", cl::aliasopt(ObjectDir));
-
-static cl::opt<bool> PreservePaths("p", cl::Grouping, cl::init(false),
-                                   cl::desc("Preserve path components"));
-static cl::alias PreservePathsA("preserve-paths", cl::aliasopt(PreservePaths));
+using namespace llvm;
 
-static cl::opt<bool> UncondBranch("u", cl::Grouping, cl::init(false),
-                                  cl::desc("Display unconditional branch info "
-                                           "(requires -b)"));
-static cl::alias UncondBranchA("unconditional-branches",
-                               cl::aliasopt(UncondBranch));
+/// \brief The main entry point for the 'show' subcommand.
+int showMain(int argc, const char *argv[]);
 
-static cl::OptionCategory DebugCat("Internal and debugging options");
-static cl::opt<bool> DumpGCOV("dump", cl::init(false), cl::cat(DebugCat),
-                              cl::desc("Dump the gcov file to stderr"));
-static cl::opt<std::string> InputGCNO("gcno", cl::cat(DebugCat), cl::init(""),
-                                      cl::desc("Override inferred gcno file"));
-static cl::opt<std::string> InputGCDA("gcda", cl::cat(DebugCat), cl::init(""),
-                                      cl::desc("Override inferred gcda file"));
+/// \brief The main entry point for the 'report' subcommand.
+int reportMain(int argc, const char *argv[]);
 
-void reportCoverage(StringRef SourceFile) {
-  SmallString<128> CoverageFileStem(ObjectDir);
-  if (CoverageFileStem.empty()) {
-    // If no directory was specified with -o, look next to the source file.
-    CoverageFileStem = sys::path::parent_path(SourceFile);
-    sys::path::append(CoverageFileStem, sys::path::stem(SourceFile));
-  } else if (sys::fs::is_directory(ObjectDir))
-    // A directory name was given. Use it and the source file name.
-    sys::path::append(CoverageFileStem, sys::path::stem(SourceFile));
-  else
-    // A file was given. Ignore the source file and look next to this file.
-    sys::path::replace_extension(CoverageFileStem, "");
+/// \brief The main entry point for the 'convert-for-testing' subcommand.
+int convertForTestingMain(int argc, const char *argv[]);
 
-  std::string GCNO = InputGCNO.empty()
-                         ? std::string(CoverageFileStem.str()) + ".gcno"
-                         : InputGCNO;
-  std::string GCDA = InputGCDA.empty()
-                         ? std::string(CoverageFileStem.str()) + ".gcda"
-                         : InputGCDA;
-  GCOVFile GF;
+/// \brief The main entry point for the gcov compatible coverage tool.
+int gcovMain(int argc, const char *argv[]);
 
-  ErrorOr<std::unique_ptr<MemoryBuffer>> GCNO_Buff =
-      MemoryBuffer::getFileOrSTDIN(GCNO);
-  if (std::error_code EC = GCNO_Buff.getError()) {
-    errs() << GCNO << ": " << EC.message() << "\n";
-    return;
-  }
-  GCOVBuffer GCNO_GB(GCNO_Buff.get().get());
-  if (!GF.readGCNO(GCNO_GB)) {
-    errs() << "Invalid .gcno File!\n";
-    return;
-  }
+/// \brief Top level help.
+int helpMain(int argc, const char *argv[]) {
+  errs() << "OVERVIEW: LLVM code coverage tool\n\n"
+         << "USAGE: llvm-cov {gcov|report|show}\n";
+  return 0;
+}
 
-  ErrorOr<std::unique_ptr<MemoryBuffer>> GCDA_Buff =
-      MemoryBuffer::getFileOrSTDIN(GCDA);
-  if (std::error_code EC = GCDA_Buff.getError()) {
-    if (EC != errc::no_such_file_or_directory) {
-      errs() << GCDA << ": " << EC.message() << "\n";
-      return;
-    }
-    // Clear the filename to make it clear we didn't read anything.
-    GCDA = "-";
-  } else {
-    GCOVBuffer GCDA_GB(GCDA_Buff.get().get());
-    if (!GF.readGCDA(GCDA_GB)) {
-      errs() << "Invalid .gcda File!\n";
-      return;
+int main(int argc, const char **argv) {
+  // If argv[0] is or ends with 'gcov', always be gcov compatible
+  if (sys::path::stem(argv[0]).endswith_lower("gcov"))
+    return gcovMain(argc, argv);
+
+  // Check if we are invoking a specific tool command.
+  if (argc > 1) {
+    typedef int (*MainFunction)(int, const char *[]);
+    MainFunction Func = StringSwitch<MainFunction>(argv[1])
+                            .Case("convert-for-testing", convertForTestingMain)
+                            .Case("gcov", gcovMain)
+                            .Case("report", reportMain)
+                            .Case("show", showMain)
+                            .Cases("-h", "-help", "--help", helpMain)
+                            .Default(nullptr);
+
+    if (Func) {
+      std::string Invocation = std::string(argv[0]) + " " + argv[1];
+      argv[1] = Invocation.c_str();
+      return Func(argc - 1, argv + 1);
     }
   }
 
-  if (DumpGCOV)
-    GF.dump();
-
-  GCOVOptions Options(AllBlocks, BranchProb, BranchCount, FuncSummary,
-                      PreservePaths, UncondBranch, LongNames, NoOutput);
-  FileInfo FI(Options);
-  GF.collectLineCounts(FI);
-  FI.print(SourceFile, GCNO, GCDA);
-}
-
-int main(int argc, char **argv) {
-  // Print a stack trace if we signal out.
-  sys::PrintStackTraceOnErrorSignal();
-  PrettyStackTraceProgram X(argc, argv);
-  llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
-
-  cl::ParseCommandLineOptions(argc, argv, "LLVM code coverage tool\n");
-
-  for (const auto &SourceFile : SourceFiles)
-    reportCoverage(SourceFile);
-  return 0;
+  // Give a warning and fall back to gcov
+  errs().changeColor(raw_ostream::RED);
+  errs() << "warning:";
+  // Assume that argv[1] wasn't a command when it stats with a '-' or is a
+  // filename (i.e. contains a '.')
+  if (argc > 1 && !StringRef(argv[1]).startswith("-") &&
+      StringRef(argv[1]).find(".") == StringRef::npos)
+    errs() << " Unrecognized command '" << argv[1] << "'.";
+  errs() << " Using the gcov compatible mode "
+            "(this behaviour may be dropped in the future).";
+  errs().resetColor();
+  errs() << "\n";
+
+  return gcovMain(argc, argv);
 }
diff --git a/tools/llvm-diff/DiffConsumer.h b/tools/llvm-diff/DiffConsumer.h
index ac13a5e3e5cc..855f6884e65b 100644
--- a/tools/llvm-diff/DiffConsumer.h
+++ b/tools/llvm-diff/DiffConsumer.h
@@ -11,8 +11,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef _LLVM_DIFFCONSUMER_H_
-#define _LLVM_DIFFCONSUMER_H_
+#ifndef LLVM_TOOLS_LLVM_DIFF_DIFFCONSUMER_H
+#define LLVM_TOOLS_LLVM_DIFF_DIFFCONSUMER_H
 
 #include "DiffLog.h"
 #include "llvm/ADT/DenseMap.h"
diff --git a/tools/llvm-diff/DiffLog.h b/tools/llvm-diff/DiffLog.h
index 43e318ac4e9f..8eb53ffffccf 100644
--- a/tools/llvm-diff/DiffLog.h
+++ b/tools/llvm-diff/DiffLog.h
@@ -11,8 +11,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef _LLVM_DIFFLOG_H_
-#define _LLVM_DIFFLOG_H_
+#ifndef LLVM_TOOLS_LLVM_DIFF_DIFFLOG_H
+#define LLVM_TOOLS_LLVM_DIFF_DIFFLOG_H
 
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringRef.h"
diff --git a/tools/llvm-diff/DifferenceEngine.h b/tools/llvm-diff/DifferenceEngine.h
index 44709685a365..f0d831144a4c 100644
--- a/tools/llvm-diff/DifferenceEngine.h
+++ b/tools/llvm-diff/DifferenceEngine.h
@@ -12,8 +12,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef _LLVM_DIFFERENCE_ENGINE_H_
-#define _LLVM_DIFFERENCE_ENGINE_H_
+#ifndef LLVM_TOOLS_LLVM_DIFF_DIFFERENCEENGINE_H
+#define LLVM_TOOLS_LLVM_DIFF_DIFFERENCEENGINE_H
 
 #include "DiffConsumer.h"
 #include "DiffLog.h"
diff --git a/tools/llvm-diff/llvm-diff.cpp b/tools/llvm-diff/llvm-diff.cpp
index f70219eaf542..ae58f5caa913 100644
--- a/tools/llvm-diff/llvm-diff.cpp
+++ b/tools/llvm-diff/llvm-diff.cpp
@@ -32,21 +32,22 @@ using namespace llvm;
 
 /// Reads a module from a file.  On error, messages are written to stderr
 /// and null is returned.
-static Module *ReadModule(LLVMContext &Context, StringRef Name) {
+static std::unique_ptr<Module> readModule(LLVMContext &Context,
+                                          StringRef Name) {
   SMDiagnostic Diag;
-  Module *M = ParseIRFile(Name, Diag, Context);
+  std::unique_ptr<Module> M = parseIRFile(Name, Diag, Context);
   if (!M)
     Diag.print("llvm-diff", errs());
   return M;
 }
 
-static void diffGlobal(DifferenceEngine &Engine, Module *L, Module *R,
+static void diffGlobal(DifferenceEngine &Engine, Module &L, Module &R,
                        StringRef Name) {
   // Drop leading sigils from the global name.
   if (Name.startswith("@")) Name = Name.substr(1);
 
-  Function *LFn = L->getFunction(Name);
-  Function *RFn = R->getFunction(Name);
+  Function *LFn = L.getFunction(Name);
+  Function *RFn = R.getFunction(Name);
   if (LFn && RFn)
     Engine.diff(LFn, RFn);
   else if (!LFn && !RFn)
@@ -72,8 +73,8 @@ int main(int argc, char **argv) {
   LLVMContext Context;
 
   // Load both modules.  Die if that fails.
-  Module *LModule = ReadModule(Context, LeftFilename);
-  Module *RModule = ReadModule(Context, RightFilename);
+  std::unique_ptr<Module> LModule = readModule(Context, LeftFilename);
+  std::unique_ptr<Module> RModule = readModule(Context, RightFilename);
   if (!LModule || !RModule) return 1;
 
   DiffConsumer Consumer;
@@ -82,15 +83,12 @@ int main(int argc, char **argv) {
   // If any global names were given, just diff those.
   if (!GlobalsToCompare.empty()) {
     for (unsigned I = 0, E = GlobalsToCompare.size(); I != E; ++I)
-      diffGlobal(Engine, LModule, RModule, GlobalsToCompare[I]);
+      diffGlobal(Engine, *LModule, *RModule, GlobalsToCompare[I]);
 
   // Otherwise, diff everything in the module.
   } else {
-    Engine.diff(LModule, RModule);
+    Engine.diff(LModule.get(), RModule.get());
   }
 
-  delete LModule;
-  delete RModule;
-
   return Consumer.hadDifferences();
 }
diff --git a/tools/llvm-dis/llvm-dis.cpp b/tools/llvm-dis/llvm-dis.cpp
index 3b0f838f1d73..1349ecc85a4c 100644
--- a/tools/llvm-dis/llvm-dis.cpp
+++ b/tools/llvm-dis/llvm-dis.cpp
@@ -20,6 +20,8 @@
 #include "llvm/Bitcode/ReaderWriter.h"
 #include "llvm/IR/AssemblyAnnotationWriter.h"
 #include "llvm/IR/DebugInfo.h"
+#include "llvm/IR/DiagnosticInfo.h"
+#include "llvm/IR/DiagnosticPrinter.h"
 #include "llvm/IR/IntrinsicInst.h"
 #include "llvm/IR/Module.h"
 #include "llvm/IR/Type.h"
@@ -112,6 +114,17 @@ public:
 
 } // end anon namespace
 
+static void diagnosticHandler(const DiagnosticInfo &DI, void *Context) {
+  assert(DI.getSeverity() == DS_Error && "Only expecting errors");
+
+  raw_ostream &OS = errs();
+  OS << (char *)Context << ": ";
+  DiagnosticPrinterRawOStream DP(OS);
+  DI.print(DP);
+  OS << '\n';
+  exit(1);
+}
+
 int main(int argc, char **argv) {
   // Print a stack trace if we signal out.
   sys::PrintStackTraceOnErrorSignal();
@@ -120,6 +133,7 @@ int main(int argc, char **argv) {
   LLVMContext &Context = getGlobalContext();
   llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.
 
+  Context.setDiagnosticHandler(diagnosticHandler, argv[0]);
 
   cl::ParseCommandLineOptions(argc, argv, "llvm .bc -> .ll disassembler\n");
 
@@ -127,30 +141,17 @@ int main(int argc, char **argv) {
   std::unique_ptr<Module> M;
 
   // Use the bitcode streaming interface
-  DataStreamer *streamer = getDataFileStreamer(InputFilename, &ErrorMessage);
-  if (streamer) {
+  DataStreamer *Streamer = getDataFileStreamer(InputFilename, &ErrorMessage);
+  if (Streamer) {
     std::string DisplayFilename;
     if (InputFilename == "-")
       DisplayFilename = "<stdin>";
     else
       DisplayFilename = InputFilename;
-    M.reset(getStreamedBitcodeModule(DisplayFilename, streamer, Context,
-                                     &ErrorMessage));
-    if(M.get()) {
-      if (std::error_code EC = M->materializeAllPermanently()) {
-        ErrorMessage = EC.message();
-        M.reset();
-      }
-    }
-  }
-
-  if (!M.get()) {
-    errs() << argv[0] << ": ";
-    if (ErrorMessage.size())
-      errs() << ErrorMessage << "\n";
-    else
-      errs() << "bitcode didn't read correctly.\n";
-    return 1;
+    ErrorOr<std::unique_ptr<Module>> MOrErr =
+        getStreamedBitcodeModule(DisplayFilename, Streamer, Context);
+    M = std::move(*MOrErr);
+    M->materializeAllPermanently();
   }
 
   // Just use stdout.  We won't actually print anything on it.
@@ -171,11 +172,11 @@ int main(int argc, char **argv) {
     }
   }
 
-  std::string ErrorInfo;
+  std::error_code EC;
   std::unique_ptr<tool_output_file> Out(
-      new tool_output_file(OutputFilename.c_str(), ErrorInfo, sys::fs::F_None));
-  if (!ErrorInfo.empty()) {
-    errs() << ErrorInfo << '\n';
+      new tool_output_file(OutputFilename, EC, sys::fs::F_None));
+  if (EC) {
+    errs() << EC.message() << '\n';
     return 1;
   }
 
diff --git a/tools/llvm-dwarfdump/llvm-dwarfdump.cpp b/tools/llvm-dwarfdump/llvm-dwarfdump.cpp
index f44b0e3ef5ed..cff8216403b7 100644
--- a/tools/llvm-dwarfdump/llvm-dwarfdump.cpp
+++ b/tools/llvm-dwarfdump/llvm-dwarfdump.cpp
@@ -21,7 +21,6 @@
 #include "llvm/Support/Format.h"
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/MemoryBuffer.h"
-#include "llvm/Support/MemoryObject.h"
 #include "llvm/Support/PrettyStackTrace.h"
 #include "llvm/Support/Signals.h"
 #include "llvm/Support/raw_ostream.h"
@@ -45,6 +44,10 @@ DumpType("debug-dump", cl::init(DIDT_All),
         clEnumValN(DIDT_All, "all", "Dump all debug sections"),
         clEnumValN(DIDT_Abbrev, "abbrev", ".debug_abbrev"),
         clEnumValN(DIDT_AbbrevDwo, "abbrev.dwo", ".debug_abbrev.dwo"),
+        clEnumValN(DIDT_AppleNames, "apple_names", ".apple_names"),
+        clEnumValN(DIDT_AppleTypes, "apple_types", ".apple_types"),
+        clEnumValN(DIDT_AppleNamespaces, "apple_namespaces", ".apple_namespaces"),
+        clEnumValN(DIDT_AppleObjC, "apple_objc", ".apple_objc"),
         clEnumValN(DIDT_Aranges, "aranges", ".debug_aranges"),
         clEnumValN(DIDT_Info, "info", ".debug_info"),
         clEnumValN(DIDT_InfoDwo, "info.dwo", ".debug_info.dwo"),
@@ -65,26 +68,28 @@ DumpType("debug-dump", cl::init(DIDT_All),
         clEnumValN(DIDT_StrOffsetsDwo, "str_offsets.dwo", ".debug_str_offsets.dwo"),
         clEnumValEnd));
 
-static void DumpInput(const StringRef &Filename) {
-  ErrorOr<std::unique_ptr<MemoryBuffer>> Buff =
+static void DumpInput(StringRef Filename) {
+  ErrorOr<std::unique_ptr<MemoryBuffer>> BuffOrErr =
       MemoryBuffer::getFileOrSTDIN(Filename);
 
-  if (std::error_code EC = Buff.getError()) {
+  if (std::error_code EC = BuffOrErr.getError()) {
     errs() << Filename << ": " << EC.message() << "\n";
     return;
   }
+  std::unique_ptr<MemoryBuffer> Buff = std::move(BuffOrErr.get());
 
-  ErrorOr<ObjectFile *> ObjOrErr(ObjectFile::createObjectFile(Buff.get()));
+  ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr =
+      ObjectFile::createObjectFile(Buff->getMemBufferRef());
   if (std::error_code EC = ObjOrErr.getError()) {
     errs() << Filename << ": " << EC.message() << '\n';
     return;
   }
-  std::unique_ptr<ObjectFile> Obj(ObjOrErr.get());
+  ObjectFile &Obj = *ObjOrErr.get();
 
-  std::unique_ptr<DIContext> DICtx(DIContext::getDWARFContext(Obj.get()));
+  std::unique_ptr<DIContext> DICtx(DIContext::getDWARFContext(Obj));
 
   outs() << Filename
-         << ":\tfile format " << Obj->getFileFormatName() << "\n\n";
+         << ":\tfile format " << Obj.getFileFormatName() << "\n\n";
   // Dump the complete DWARF structure.
   DICtx->dump(outs(), DumpType);
 }
diff --git a/tools/llvm-extract/llvm-extract.cpp b/tools/llvm-extract/llvm-extract.cpp
index 0f7086802a41..53b2f0d00f41 100644
--- a/tools/llvm-extract/llvm-extract.cpp
+++ b/tools/llvm-extract/llvm-extract.cpp
@@ -101,8 +101,7 @@ int main(int argc, char **argv) {
 
   // Use lazy loading, since we only care about selected global values.
   SMDiagnostic Err;
-  std::unique_ptr<Module> M;
-  M.reset(getLazyIRFileModule(InputFilename, Err, Context));
+  std::unique_ptr<Module> M = getLazyIRFileModule(InputFilename, Err, Context);
 
   if (!M.get()) {
     Err.print(argv[0], errs());
@@ -217,31 +216,28 @@ int main(int argc, char **argv) {
   if (!DeleteFn)
     for (size_t i = 0, e = GVs.size(); i != e; ++i) {
       GlobalValue *GV = GVs[i];
-      if (GV->isMaterializable()) {
-        std::string ErrInfo;
-        if (GV->Materialize(&ErrInfo)) {
-          errs() << argv[0] << ": error reading input: " << ErrInfo << "\n";
-          return 1;
-        }
+      if (std::error_code EC = GV->materialize()) {
+        errs() << argv[0] << ": error reading input: " << EC.message() << "\n";
+        return 1;
       }
     }
   else {
     // Deleting. Materialize every GV that's *not* in GVs.
     SmallPtrSet<GlobalValue *, 8> GVSet(GVs.begin(), GVs.end());
     for (auto &G : M->globals()) {
-      if (!GVSet.count(&G) && G.isMaterializable()) {
-        std::string ErrInfo;
-        if (G.Materialize(&ErrInfo)) {
-          errs() << argv[0] << ": error reading input: " << ErrInfo << "\n";
+      if (!GVSet.count(&G)) {
+        if (std::error_code EC = G.materialize()) {
+          errs() << argv[0] << ": error reading input: " << EC.message()
+                 << "\n";
           return 1;
         }
       }
     }
     for (auto &F : *M) {
-      if (!GVSet.count(&F) && F.isMaterializable()) {
-        std::string ErrInfo;
-        if (F.Materialize(&ErrInfo)) {
-          errs() << argv[0] << ": error reading input: " << ErrInfo << "\n";
+      if (!GVSet.count(&F)) {
+        if (std::error_code EC = F.materialize()) {
+          errs() << argv[0] << ": error reading input: " << EC.message()
+                 << "\n";
           return 1;
         }
       }
@@ -251,7 +247,7 @@ int main(int argc, char **argv) {
   // In addition to deleting all other functions, we also want to spiff it
   // up a little bit.  Do this now.
   PassManager Passes;
-  Passes.add(new DataLayoutPass(M.get())); // Use correct DataLayout
+  Passes.add(new DataLayoutPass()); // Use correct DataLayout
 
   std::vector<GlobalValue*> Gvs(GVs.begin(), GVs.end());
 
@@ -261,10 +257,10 @@ int main(int argc, char **argv) {
   Passes.add(createStripDeadDebugInfoPass());    // Remove dead debug info
   Passes.add(createStripDeadPrototypesPass());   // Remove dead func decls
 
-  std::string ErrorInfo;
-  tool_output_file Out(OutputFilename.c_str(), ErrorInfo, sys::fs::F_None);
-  if (!ErrorInfo.empty()) {
-    errs() << ErrorInfo << '\n';
+  std::error_code EC;
+  tool_output_file Out(OutputFilename, EC, sys::fs::F_None);
+  if (EC) {
+    errs() << EC.message() << '\n';
     return 1;
   }
 
diff --git a/tools/llvm-go/CMakeLists.txt b/tools/llvm-go/CMakeLists.txt
new file mode 100644
index 000000000000..20393f728f8f
--- /dev/null
+++ b/tools/llvm-go/CMakeLists.txt
@@ -0,0 +1,9 @@
+if(LLVM_BINDINGS MATCHES "go")
+  set(binpath ${CMAKE_BINARY_DIR}/bin/llvm-go${CMAKE_EXECUTABLE_SUFFIX})
+  add_custom_command(OUTPUT ${binpath}
+    COMMAND ${GO_EXECUTABLE} build -o ${binpath} llvm-go.go
+    DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/llvm-go.go
+    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+    COMMENT "Building Go executable llvm-go")
+  add_custom_target(llvm-go ALL DEPENDS ${binpath})
+endif()
diff --git a/tools/llvm-go/Makefile b/tools/llvm-go/Makefile
new file mode 100644
index 000000000000..4465b2a4a9db
--- /dev/null
+++ b/tools/llvm-go/Makefile
@@ -0,0 +1,16 @@
+##===- tools/llvm-go/Makefile ------------------------------*- Makefile -*-===##
+# 
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+# 
+##===----------------------------------------------------------------------===##
+
+LEVEL := ../..
+include $(LEVEL)/Makefile.common
+
+all:: $(ToolDir)/llvm-go$(EXEEXT)
+
+$(ToolDir)/llvm-go$(EXEEXT): $(PROJ_SRC_DIR)/llvm-go.go
+	$(GO) build -o $@ $<
diff --git a/tools/llvm-go/llvm-go.go b/tools/llvm-go/llvm-go.go
new file mode 100644
index 000000000000..cf520bd90e9d
--- /dev/null
+++ b/tools/llvm-go/llvm-go.go
@@ -0,0 +1,290 @@
+//===-- llvm-go.go - go tool wrapper for LLVM -----------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This tool lets us build LLVM components within the tree by setting up a
+// $GOPATH that resembles a tree fetched in the normal way with "go get".
+//
+//===----------------------------------------------------------------------===//
+
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"runtime"
+	"strings"
+)
+
+type pkg struct {
+	llvmpath, pkgpath string
+}
+
+var packages = []pkg{
+	{"bindings/go/llvm", "llvm.org/llvm/bindings/go/llvm"},
+	{"tools/llgo", "llvm.org/llgo"},
+}
+
+type compilerFlags struct {
+	cpp, cxx, ld string
+}
+
+var components = []string{
+	"all-targets",
+	"analysis",
+	"asmparser",
+	"asmprinter",
+	"bitreader",
+	"bitwriter",
+	"codegen",
+	"core",
+	"debuginfo",
+	"executionengine",
+	"instrumentation",
+	"interpreter",
+	"ipo",
+	"irreader",
+	"linker",
+	"mc",
+	"mcjit",
+	"objcarcopts",
+	"option",
+	"profiledata",
+	"scalaropts",
+	"support",
+	"target",
+}
+
+func llvmConfig(args ...string) string {
+	configpath := os.Getenv("LLVM_CONFIG")
+	if configpath == "" {
+		// strip llvm-go, add llvm-config
+		configpath = os.Args[0][:len(os.Args[0])-7] + "llvm-config"
+	}
+
+	cmd := exec.Command(configpath, args...)
+	out, err := cmd.Output()
+	if err != nil {
+		panic(err.Error())
+	}
+
+	outstr := string(out)
+	outstr = strings.TrimSuffix(outstr, "\n")
+	return strings.Replace(outstr, "\n", " ", -1)
+}
+
+func llvmFlags() compilerFlags {
+	ldflags := llvmConfig(append([]string{"--ldflags", "--libs", "--system-libs"}, components...)...)
+	if runtime.GOOS != "darwin" {
+		// OS X doesn't like -rpath with cgo. See:
+		// https://code.google.com/p/go/issues/detail?id=7293
+		ldflags = "-Wl,-rpath," + llvmConfig("--libdir") + " " + ldflags
+	}
+	return compilerFlags{
+		cpp: llvmConfig("--cppflags"),
+		cxx: "-std=c++11",
+		ld:  ldflags,
+	}
+}
+
+func addTag(args []string, tag string) []string {
+	args = append([]string{}, args...)
+	addedTag := false
+	for i, a := range args {
+		if strings.HasPrefix(a, "-tags=") {
+			args[i] = a + " " + tag
+			addedTag = true
+		} else if a == "-tags" && i+1 < len(args) {
+			args[i+1] = args[i+1] + " " + tag
+			addedTag = true
+		}
+	}
+	if !addedTag {
+		args = append([]string{args[0], "-tags", tag}, args[1:]...)
+	}
+	return args
+}
+
+func printComponents() {
+	fmt.Println(strings.Join(components, " "))
+}
+
+func printConfig() {
+	flags := llvmFlags()
+
+	fmt.Printf(`// +build !byollvm
+
+// This file is generated by llvm-go, do not edit.
+
+package llvm
+
+/*
+#cgo CPPFLAGS: %s
+#cgo CXXFLAGS: %s
+#cgo LDFLAGS: %s
+*/
+import "C"
+
+type (run_build_sh int)
+`, flags.cpp, flags.cxx, flags.ld)
+}
+
+func runGoWithLLVMEnv(args []string, cc, cxx, llgo, cppflags, cxxflags, ldflags string) {
+	args = addTag(args, "byollvm")
+
+	srcdir := llvmConfig("--src-root")
+
+	tmpgopath, err := ioutil.TempDir("", "gopath")
+	if err != nil {
+		panic(err.Error())
+	}
+
+	for _, p := range packages {
+		path := filepath.Join(tmpgopath, "src", p.pkgpath)
+		err := os.MkdirAll(filepath.Dir(path), os.ModePerm)
+		if err != nil {
+			panic(err.Error())
+		}
+
+		err = os.Symlink(filepath.Join(srcdir, p.llvmpath), path)
+		if err != nil {
+			panic(err.Error())
+		}
+	}
+
+	newpath := os.Getenv("PATH")
+
+	if llgo != "" {
+		bindir := filepath.Join(tmpgopath, "bin")
+
+		err = os.MkdirAll(bindir, os.ModePerm)
+		if err != nil {
+			panic(err.Error())
+		}
+
+		err = os.Symlink(llgo, filepath.Join(bindir, "gccgo"))
+		if err != nil {
+			panic(err.Error())
+		}
+
+		newpathlist := []string{bindir}
+		newpathlist = append(newpathlist, filepath.SplitList(newpath)...)
+		newpath = strings.Join(newpathlist, string(filepath.ListSeparator))
+
+		args = append([]string{args[0], "-compiler", "gccgo"}, args[1:]...)
+	}
+
+	newgopathlist := []string{tmpgopath}
+	newgopathlist = append(newgopathlist, filepath.SplitList(os.Getenv("GOPATH"))...)
+	newgopath := strings.Join(newgopathlist, string(filepath.ListSeparator))
+
+	flags := llvmFlags()
+
+	newenv := []string{
+		"CC=" + cc,
+		"CXX=" + cxx,
+		"CGO_CPPFLAGS=" + flags.cpp + " " + cppflags,
+		"CGO_CXXFLAGS=" + flags.cxx + " " + cxxflags,
+		"CGO_LDFLAGS=" + flags.ld + " " + ldflags,
+		"GOPATH=" + newgopath,
+		"PATH=" + newpath,
+	}
+	for _, v := range os.Environ() {
+		if !strings.HasPrefix(v, "CC=") &&
+			!strings.HasPrefix(v, "CXX=") &&
+			!strings.HasPrefix(v, "CGO_CPPFLAGS=") &&
+			!strings.HasPrefix(v, "CGO_CXXFLAGS=") &&
+			!strings.HasPrefix(v, "CGO_LDFLAGS=") &&
+			!strings.HasPrefix(v, "GOPATH=") &&
+			!strings.HasPrefix(v, "PATH=") {
+			newenv = append(newenv, v)
+		}
+	}
+
+	gocmdpath, err := exec.LookPath("go")
+	if err != nil {
+		panic(err.Error())
+	}
+
+	proc, err := os.StartProcess(gocmdpath, append([]string{"go"}, args...),
+		&os.ProcAttr{
+			Env:   newenv,
+			Files: []*os.File{os.Stdin, os.Stdout, os.Stderr},
+		})
+	if err != nil {
+		panic(err.Error())
+	}
+	ps, err := proc.Wait()
+	if err != nil {
+		panic(err.Error())
+	}
+
+	os.RemoveAll(tmpgopath)
+
+	if !ps.Success() {
+		os.Exit(1)
+	}
+}
+
+func usage() {
+	fmt.Println(`Usage: llvm-go subcommand [flags]
+
+Available subcommands: build get install run test print-components print-config`)
+	os.Exit(0)
+}
+
+func main() {
+	cc := os.Getenv("CC")
+	cxx := os.Getenv("CXX")
+	cppflags := os.Getenv("CGO_CPPFLAGS")
+	cxxflags := os.Getenv("CGO_CXXFLAGS")
+	ldflags := os.Getenv("CGO_LDFLAGS")
+	llgo := ""
+
+	args := os.Args[1:]
+	DONE: for {
+		switch {
+		case len(args) == 0:
+			usage()
+		case strings.HasPrefix(args[0], "cc="):
+			cc = args[0][3:]
+			args = args[1:]
+		case strings.HasPrefix(args[0], "cxx="):
+			cxx = args[0][4:]
+			args = args[1:]
+		case strings.HasPrefix(args[0], "llgo="):
+			llgo = args[0][5:]
+			args = args[1:]
+		case strings.HasPrefix(args[0], "cppflags="):
+			cppflags = args[0][9:]
+			args = args[1:]
+		case strings.HasPrefix(args[0], "cxxflags="):
+			cxxflags = args[0][9:]
+			args = args[1:]
+		case strings.HasPrefix(args[0], "ldflags="):
+			ldflags = args[0][8:]
+			args = args[1:]
+		default:
+			break DONE
+		}
+	}
+
+	switch args[0] {
+	case "build", "get", "install", "run", "test":
+		runGoWithLLVMEnv(args, cc, cxx, llgo, cppflags, cxxflags, ldflags)
+	case "print-components":
+		printComponents()
+	case "print-config":
+		printConfig()
+	default:
+		usage()
+	}
+}
diff --git a/tools/llvm-jitlistener/CMakeLists.txt b/tools/llvm-jitlistener/CMakeLists.txt
index c9704fb22489..68a4303acef0 100644
--- a/tools/llvm-jitlistener/CMakeLists.txt
+++ b/tools/llvm-jitlistener/CMakeLists.txt
@@ -1,22 +1,21 @@
-# This tool is excluded from the CMake build if Intel JIT events are disabled.

-

-link_directories( ${LLVM_INTEL_JITEVENTS_LIBDIR} )

-include_directories( ${LLVM_INTEL_JITEVENTS_INCDIR} )

-

-set(LLVM_LINK_COMPONENTS

-  asmparser

-  bitreader

-  debuginfo

-  inteljitevents

-  interpreter

-  irreader

-  jit

-  mcjit

-  nativecodegen

-  object

-  selectiondag

-  )

-

-add_llvm_tool(llvm-jitlistener

-  llvm-jitlistener.cpp

-  )

+# This tool is excluded from the CMake build if Intel JIT events are disabled.
+
+link_directories( ${LLVM_INTEL_JITEVENTS_LIBDIR} )
+include_directories( ${LLVM_INTEL_JITEVENTS_INCDIR} )
+
+set(LLVM_LINK_COMPONENTS
+  asmparser
+  bitreader
+  debuginfo
+  inteljitevents
+  interpreter
+  irreader
+  mcjit
+  nativecodegen
+  object
+  selectiondag
+  )
+
+add_llvm_tool(llvm-jitlistener
+  llvm-jitlistener.cpp
+  )
diff --git a/tools/llvm-jitlistener/LLVMBuild.txt b/tools/llvm-jitlistener/LLVMBuild.txt
index 1ce78acecbb6..e6ed20b24030 100644
--- a/tools/llvm-jitlistener/LLVMBuild.txt
+++ b/tools/llvm-jitlistener/LLVMBuild.txt
@@ -19,4 +19,4 @@
 type = Tool
 name = llvm-jitlistener
 parent = Tools
-required_libraries = AsmParser BitReader IRReader Interpreter JIT MCJIT NativeCodeGen Object SelectionDAG Native
+required_libraries = AsmParser BitReader IRReader Interpreter MCJIT NativeCodeGen Object SelectionDAG Native
diff --git a/tools/llvm-jitlistener/Makefile b/tools/llvm-jitlistener/Makefile
index b13222731745..6d72427e96e8 100644
--- a/tools/llvm-jitlistener/Makefile
+++ b/tools/llvm-jitlistener/Makefile
@@ -12,7 +12,7 @@ TOOLNAME := llvm-jitlistener
 

 include $(LEVEL)/Makefile.config

 

-LINK_COMPONENTS := mcjit jit interpreter nativecodegen bitreader asmparser irreader selectiondag Object

+LINK_COMPONENTS := mcjit interpreter nativecodegen bitreader asmparser irreader selectiondag Object

 

 # If Intel JIT Events support is configured, link against the LLVM Intel JIT

 # Events interface library.  If not, this tool will do nothing useful, but it

diff --git a/tools/llvm-jitlistener/llvm-jitlistener.cpp b/tools/llvm-jitlistener/llvm-jitlistener.cpp
index c159aa506d6a..c3091a559550 100644
--- a/tools/llvm-jitlistener/llvm-jitlistener.cpp
+++ b/tools/llvm-jitlistener/llvm-jitlistener.cpp
@@ -17,12 +17,12 @@
 #include "../../lib/ExecutionEngine/IntelJITEvents/IntelJITEventsWrapper.h"
 #include "llvm/ADT/Triple.h"
 #include "llvm/ExecutionEngine/JITEventListener.h"
-#include "llvm/ExecutionEngine/JITMemoryManager.h"
 #include "llvm/ExecutionEngine/MCJIT.h"
-#include "llvm/ExecutionEngine/ObjectImage.h"
+#include "llvm/ExecutionEngine/SectionMemoryManager.h"
 #include "llvm/IR/Module.h"
 #include "llvm/IRReader/IRReader.h"
 #include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Debug.h"
 #include "llvm/Support/Host.h"
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/MemoryBuffer.h"
@@ -113,26 +113,18 @@ protected:
 
     // Parse the bitcode...
     SMDiagnostic Err;
-    TheModule = ParseIRFile(IRFile, Err, Context);
+    std::unique_ptr<Module> TheModule(parseIRFile(IRFile, Err, Context));
     if (!TheModule) {
       errs() << Err.getMessage();
       return;
     }
 
-    // FIXME: This is using the default legacy JITMemoryManager because it
-    // supports poison memory.  At some point, we'll need to update this to
-    // use an MCJIT-specific memory manager.  It might be nice to have the
-    // poison memory option there too.
-    JITMemoryManager *MemMgr = JITMemoryManager::CreateDefaultMemManager();
+    RTDyldMemoryManager *MemMgr = new SectionMemoryManager();
     if (!MemMgr) {
       errs() << "Unable to create memory manager.";
       return;
     }
 
-    // Tell the memory manager to poison freed memory so that accessing freed
-    // memory is more easily tested.
-    MemMgr->setPoisonMemory(true);
-
     // Override the triple to generate ELF on Windows since that's supported
     Triple Tuple(TheModule->getTargetTriple());
     if (Tuple.getTriple().empty())
@@ -145,11 +137,10 @@ protected:
 
     // Compile the IR
     std::string Error;
-    TheJIT.reset(EngineBuilder(TheModule)
+    TheJIT.reset(EngineBuilder(std::move(TheModule))
       .setEngineKind(EngineKind::JIT)
       .setErrorStr(&Error)
-      .setJITMemoryManager(MemMgr)
-      .setUseMCJIT(true)
+      .setMCJITMemoryManager(std::unique_ptr<RTDyldMemoryManager>(MemMgr))
       .create());
     if (Error.empty() == false)
       errs() << Error;
@@ -160,8 +151,6 @@ protected:
   }
 
   LLVMContext Context; // Global ownership
-  Module *TheModule; // Owned by ExecutionEngine.
-  JITMemoryManager *JMM; // Owned by ExecutionEngine.
   std::unique_ptr<ExecutionEngine> TheJIT;
 
 public:
diff --git a/tools/llvm-link/llvm-link.cpp b/tools/llvm-link/llvm-link.cpp
index ed8c06e79843..828b9bb8ef70 100644
--- a/tools/llvm-link/llvm-link.cpp
+++ b/tools/llvm-link/llvm-link.cpp
@@ -14,6 +14,8 @@
 
 #include "llvm/Linker/Linker.h"
 #include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/IR/DiagnosticInfo.h"
+#include "llvm/IR/DiagnosticPrinter.h"
 #include "llvm/IR/LLVMContext.h"
 #include "llvm/IR/Module.h"
 #include "llvm/IR/Verifier.h"
@@ -55,20 +57,39 @@ static cl::opt<bool>
 SuppressWarnings("suppress-warnings", cl::desc("Suppress all linking warnings"),
                  cl::init(false));
 
-// LoadFile - Read the specified bitcode file in and return it.  This routine
-// searches the link path for the specified file to try to find it...
+// Read the specified bitcode file in and return it. This routine searches the
+// link path for the specified file to try to find it...
 //
-static inline Module *LoadFile(const char *argv0, const std::string &FN,
-                               LLVMContext& Context) {
+static std::unique_ptr<Module>
+loadFile(const char *argv0, const std::string &FN, LLVMContext &Context) {
   SMDiagnostic Err;
   if (Verbose) errs() << "Loading '" << FN << "'\n";
-  Module* Result = nullptr;
+  std::unique_ptr<Module> Result = getLazyIRFileModule(FN, Err, Context);
+  if (!Result)
+    Err.print(argv0, errs());
 
-  Result = ParseIRFile(FN, Err, Context);
-  if (Result) return Result;   // Load successful!
+  return Result;
+}
+
+static void diagnosticHandler(const DiagnosticInfo &DI) {
+  unsigned Severity = DI.getSeverity();
+  switch (Severity) {
+  case DS_Error:
+    errs() << "ERROR: ";
+    break;
+  case DS_Warning:
+    if (SuppressWarnings)
+      return;
+    errs() << "WARNING: ";
+    break;
+  case DS_Remark:
+  case DS_Note:
+    llvm_unreachable("Only expecting warnings and errors");
+  }
 
-  Err.print(argv0, errs());
-  return nullptr;
+  DiagnosticPrinterRawOStream DP(errs());
+  DI.print(DP);
+  errs() << '\n';
 }
 
 int main(int argc, char **argv) {
@@ -80,20 +101,11 @@ int main(int argc, char **argv) {
   llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.
   cl::ParseCommandLineOptions(argc, argv, "llvm linker\n");
 
-  unsigned BaseArg = 0;
-  std::string ErrorMessage;
+  auto Composite = make_unique<Module>("llvm-link", Context);
+  Linker L(Composite.get(), diagnosticHandler);
 
-  std::unique_ptr<Module> Composite(
-      LoadFile(argv[0], InputFilenames[BaseArg], Context));
-  if (!Composite.get()) {
-    errs() << argv[0] << ": error loading file '"
-           << InputFilenames[BaseArg] << "'\n";
-    return 1;
-  }
-
-  Linker L(Composite.get(), SuppressWarnings);
-  for (unsigned i = BaseArg+1; i < InputFilenames.size(); ++i) {
-    std::unique_ptr<Module> M(LoadFile(argv[0], InputFilenames[i], Context));
+  for (unsigned i = 0; i < InputFilenames.size(); ++i) {
+    std::unique_ptr<Module> M = loadFile(argv[0], InputFilenames[i], Context);
     if (!M.get()) {
       errs() << argv[0] << ": error loading file '" <<InputFilenames[i]<< "'\n";
       return 1;
@@ -101,19 +113,16 @@ int main(int argc, char **argv) {
 
     if (Verbose) errs() << "Linking in '" << InputFilenames[i] << "'\n";
 
-    if (L.linkInModule(M.get(), &ErrorMessage)) {
-      errs() << argv[0] << ": link error in '" << InputFilenames[i]
-             << "': " << ErrorMessage << "\n";
+    if (L.linkInModule(M.get()))
       return 1;
-    }
   }
 
   if (DumpAsm) errs() << "Here's the assembly:\n" << *Composite;
 
-  std::string ErrorInfo;
-  tool_output_file Out(OutputFilename.c_str(), ErrorInfo, sys::fs::F_None);
-  if (!ErrorInfo.empty()) {
-    errs() << ErrorInfo << '\n';
+  std::error_code EC;
+  tool_output_file Out(OutputFilename, EC, sys::fs::F_None);
+  if (EC) {
+    errs() << EC.message() << '\n';
     return 1;
   }
 
diff --git a/tools/llvm-lto/llvm-lto.cpp b/tools/llvm-lto/llvm-lto.cpp
index 8b39f1285f5f..9cd031eaf8d3 100644
--- a/tools/llvm-lto/llvm-lto.cpp
+++ b/tools/llvm-lto/llvm-lto.cpp
@@ -38,6 +38,14 @@ static cl::opt<bool>
 DisableGVNLoadPRE("disable-gvn-loadpre", cl::init(false),
   cl::desc("Do not run the GVN load PRE pass"));
 
+static cl::opt<bool>
+DisableLTOVectorization("disable-lto-vectorization", cl::init(false),
+  cl::desc("Do not run loop or slp vectorization during LTO"));
+
+static cl::opt<bool>
+UseDiagnosticHandler("use-diagnostic-handler", cl::init(false),
+  cl::desc("Use a diagnostic handler to test the handler interface"));
+
 static cl::list<std::string>
 InputFilenames(cl::Positional, cl::OneOrMore,
   cl::desc("<input bitcode files>"));
@@ -57,12 +65,75 @@ DSOSymbols("dso-symbol",
   cl::desc("Symbol to put in the symtab in the resulting dso"),
   cl::ZeroOrMore);
 
+static cl::opt<bool> ListSymbolsOnly(
+    "list-symbols-only", cl::init(false),
+    cl::desc("Instead of running LTO, list the symbols in each IR file"));
+
 namespace {
 struct ModuleInfo {
   std::vector<bool> CanBeHidden;
 };
 }
 
+void handleDiagnostics(lto_codegen_diagnostic_severity_t Severity,
+                       const char *Msg, void *) {
+  switch (Severity) {
+  case LTO_DS_NOTE:
+    errs() << "note: ";
+    break;
+  case LTO_DS_REMARK:
+    errs() << "remark: ";
+    break;
+  case LTO_DS_ERROR:
+    errs() << "error: ";
+    break;
+  case LTO_DS_WARNING:
+    errs() << "warning: ";
+    break;
+  }
+  errs() << Msg << "\n";
+}
+
+std::unique_ptr<LTOModule>
+getLocalLTOModule(StringRef Path, std::unique_ptr<MemoryBuffer> &Buffer,
+                  const TargetOptions &Options, std::string &Error) {
+  ErrorOr<std::unique_ptr<MemoryBuffer>> BufferOrErr =
+      MemoryBuffer::getFile(Path);
+  if (std::error_code EC = BufferOrErr.getError()) {
+    Error = EC.message();
+    return nullptr;
+  }
+  Buffer = std::move(BufferOrErr.get());
+  return std::unique_ptr<LTOModule>(LTOModule::createInLocalContext(
+      Buffer->getBufferStart(), Buffer->getBufferSize(), Options, Error, Path));
+}
+
+/// \brief List symbols in each IR file.
+///
+/// The main point here is to provide lit-testable coverage for the LTOModule
+/// functionality that's exposed by the C API to list symbols.  Moreover, this
+/// provides testing coverage for modules that have been created in their own
+/// contexts.
+int listSymbols(StringRef Command, const TargetOptions &Options) {
+  for (auto &Filename : InputFilenames) {
+    std::string Error;
+    std::unique_ptr<MemoryBuffer> Buffer;
+    std::unique_ptr<LTOModule> Module =
+        getLocalLTOModule(Filename, Buffer, Options, Error);
+    if (!Module) {
+      errs() << Command << ": error loading file '" << Filename
+             << "': " << Error << "\n";
+      return 1;
+    }
+
+    // List the symbols.
+    outs() << Filename << ":\n";
+    for (int I = 0, E = Module->getSymbolCount(); I != E; ++I)
+      outs() << Module->getSymbolName(I) << "\n";
+  }
+  return 0;
+}
+
 int main(int argc, char **argv) {
   // Print a stack trace if we signal out.
   sys::PrintStackTraceOnErrorSignal();
@@ -80,10 +151,16 @@ int main(int argc, char **argv) {
   // set up the TargetOptions for the machine
   TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
 
+  if (ListSymbolsOnly)
+    return listSymbols(argv[0], Options);
+
   unsigned BaseArg = 0;
 
   LTOCodeGenerator CodeGen;
 
+  if (UseDiagnosticHandler)
+    CodeGen.setDiagnosticHandler(handleDiagnostics, nullptr);
+
   switch (RelocModel) {
   case Reloc::Static:
     CodeGen.setCodePICModel(LTO_CODEGEN_PIC_MODEL_STATIC);
@@ -117,12 +194,8 @@ int main(int argc, char **argv) {
       return 1;
     }
 
-
-    if (!CodeGen.addModule(Module.get(), error)) {
-      errs() << argv[0] << ": error adding file '" << InputFilenames[i]
-             << "': " << error << "\n";
+    if (!CodeGen.addModule(Module.get()))
       return 1;
-    }
 
     unsigned NumSyms = Module->getSymbolCount();
     for (unsigned I = 0; I < NumSyms; ++I) {
@@ -157,19 +230,20 @@ int main(int argc, char **argv) {
   if (!OutputFilename.empty()) {
     size_t len = 0;
     std::string ErrorInfo;
-    const void *Code = CodeGen.compile(&len, DisableOpt, DisableInline,
-                                       DisableGVNLoadPRE, ErrorInfo);
+    const void *Code =
+        CodeGen.compile(&len, DisableOpt, DisableInline, DisableGVNLoadPRE,
+                        DisableLTOVectorization, ErrorInfo);
     if (!Code) {
       errs() << argv[0]
              << ": error compiling the code: " << ErrorInfo << "\n";
       return 1;
     }
 
-    raw_fd_ostream FileStream(OutputFilename.c_str(), ErrorInfo,
-                              sys::fs::F_None);
-    if (!ErrorInfo.empty()) {
+    std::error_code EC;
+    raw_fd_ostream FileStream(OutputFilename, EC, sys::fs::F_None);
+    if (EC) {
       errs() << argv[0] << ": error opening the file '" << OutputFilename
-             << "': " << ErrorInfo << "\n";
+             << "': " << EC.message() << "\n";
       return 1;
     }
 
@@ -178,7 +252,8 @@ int main(int argc, char **argv) {
     std::string ErrorInfo;
     const char *OutputName = nullptr;
     if (!CodeGen.compile_to_file(&OutputName, DisableOpt, DisableInline,
-                                 DisableGVNLoadPRE, ErrorInfo)) {
+                                 DisableGVNLoadPRE, DisableLTOVectorization,
+                                 ErrorInfo)) {
       errs() << argv[0]
              << ": error compiling the code: " << ErrorInfo
              << "\n";
diff --git a/tools/llvm-mc/Disassembler.cpp b/tools/llvm-mc/Disassembler.cpp
index 936759039874..5ffeffc07682 100644
--- a/tools/llvm-mc/Disassembler.cpp
+++ b/tools/llvm-mc/Disassembler.cpp
@@ -22,55 +22,35 @@
 #include "llvm/MC/MCStreamer.h"
 #include "llvm/MC/MCSubtargetInfo.h"
 #include "llvm/Support/MemoryBuffer.h"
-#include "llvm/Support/MemoryObject.h"
 #include "llvm/Support/SourceMgr.h"
 #include "llvm/Support/TargetRegistry.h"
 #include "llvm/Support/raw_ostream.h"
 
 using namespace llvm;
 
-typedef std::vector<std::pair<unsigned char, const char*> > ByteArrayTy;
-
-namespace {
-class VectorMemoryObject : public MemoryObject {
-private:
-  const ByteArrayTy &Bytes;
-public:
-  VectorMemoryObject(const ByteArrayTy &bytes) : Bytes(bytes) {}
-
-  uint64_t getBase() const override { return 0; }
-  uint64_t getExtent() const override { return Bytes.size(); }
-
-  int readByte(uint64_t Addr, uint8_t *Byte) const override {
-    if (Addr >= getExtent())
-      return -1;
-    *Byte = Bytes[Addr].first;
-    return 0;
-  }
-};
-}
+typedef std::pair<std::vector<unsigned char>, std::vector<const char *>>
+    ByteArrayTy;
 
 static bool PrintInsts(const MCDisassembler &DisAsm,
                        const ByteArrayTy &Bytes,
                        SourceMgr &SM, raw_ostream &Out,
                        MCStreamer &Streamer, bool InAtomicBlock,
                        const MCSubtargetInfo &STI) {
-  // Wrap the vector in a MemoryObject.
-  VectorMemoryObject memoryObject(Bytes);
+  ArrayRef<uint8_t> Data(Bytes.first.data(), Bytes.first.size());
 
   // Disassemble it to strings.
   uint64_t Size;
   uint64_t Index;
 
-  for (Index = 0; Index < Bytes.size(); Index += Size) {
+  for (Index = 0; Index < Bytes.first.size(); Index += Size) {
     MCInst Inst;
 
     MCDisassembler::DecodeStatus S;
-    S = DisAsm.getInstruction(Inst, Size, memoryObject, Index,
+    S = DisAsm.getInstruction(Inst, Size, Data.slice(Index), Index,
                               /*REMOVE*/ nulls(), nulls());
     switch (S) {
     case MCDisassembler::Fail:
-      SM.PrintMessage(SMLoc::getFromPointer(Bytes[Index].second),
+      SM.PrintMessage(SMLoc::getFromPointer(Bytes.second[Index]),
                       SourceMgr::DK_Warning,
                       "invalid instruction encoding");
       // Don't try to resynchronise the stream in a block
@@ -83,7 +63,7 @@ static bool PrintInsts(const MCDisassembler &DisAsm,
       break;
 
     case MCDisassembler::SoftFail:
-      SM.PrintMessage(SMLoc::getFromPointer(Bytes[Index].second),
+      SM.PrintMessage(SMLoc::getFromPointer(Bytes.second[Index]),
                       SourceMgr::DK_Warning,
                       "potentially undefined instruction encoding");
       // Fall through
@@ -98,29 +78,23 @@ static bool PrintInsts(const MCDisassembler &DisAsm,
 }
 
 static bool SkipToToken(StringRef &Str) {
-  while (!Str.empty() && Str.find_first_not_of(" \t\r\n#,") != 0) {
+  for (;;) {
+    if (Str.empty())
+      return false;
+
     // Strip horizontal whitespace and commas.
-    if (size_t Pos = Str.find_first_not_of(" \t\r,")) {
+    if (size_t Pos = Str.find_first_not_of(" \t\r\n,")) {
       Str = Str.substr(Pos);
+      continue;
     }
 
-    // If this is the end of a line or start of a comment, remove the rest of
-    // the line.
-    if (Str[0] == '\n' || Str[0] == '#') {
-      // Strip to the end of line if we already processed any bytes on this
-      // line.  This strips the comment and/or the \n.
-      if (Str[0] == '\n') {
-        Str = Str.substr(1);
-      } else {
+    // If this is the start of a comment, remove the rest of the line.
+    if (Str[0] == '#') {
         Str = Str.substr(Str.find_first_of('\n'));
-        if (!Str.empty())
-          Str = Str.substr(1);
-      }
       continue;
     }
+    return true;
   }
-
-  return !Str.empty();
 }
 
 
@@ -143,11 +117,13 @@ static bool ByteArrayFromString(ByteArrayTy &ByteArray,
       SM.PrintMessage(SMLoc::getFromPointer(Value.data()), SourceMgr::DK_Error,
                       "invalid input token");
       Str = Str.substr(Str.find('\n'));
-      ByteArray.clear();
+      ByteArray.first.clear();
+      ByteArray.second.clear();
       continue;
     }
 
-    ByteArray.push_back(std::make_pair((unsigned char)ByteVal, Value.data()));
+    ByteArray.first.push_back(ByteVal);
+    ByteArray.second.push_back(Value.data());
     Str = Str.substr(Next);
   }
 
@@ -185,7 +161,7 @@ int Disassembler::disassemble(const Target &T,
   }
 
   // Set up initial section manually here
-  Streamer.InitSections();
+  Streamer.InitSections(false);
 
   bool ErrorOccurred = false;
 
@@ -195,7 +171,8 @@ int Disassembler::disassemble(const Target &T,
   bool InAtomicBlock = false;
 
   while (SkipToToken(Str)) {
-    ByteArray.clear();
+    ByteArray.first.clear();
+    ByteArray.second.clear();
 
     if (Str[0] == '[') {
       if (InAtomicBlock) {
@@ -220,7 +197,7 @@ int Disassembler::disassemble(const Target &T,
     // It's a real token, get the bytes and emit them
     ErrorOccurred |= ByteArrayFromString(ByteArray, Str, SM);
 
-    if (!ByteArray.empty())
+    if (!ByteArray.first.empty())
       ErrorOccurred |= PrintInsts(*DisAsm, ByteArray, SM, Out, Streamer,
                                   InAtomicBlock, STI);
   }
diff --git a/tools/llvm-mc/Disassembler.h b/tools/llvm-mc/Disassembler.h
index 5615da8d3d36..1f18ac075f85 100644
--- a/tools/llvm-mc/Disassembler.h
+++ b/tools/llvm-mc/Disassembler.h
@@ -12,8 +12,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef DISASSEMBLER_H
-#define DISASSEMBLER_H
+#ifndef LLVM_TOOLS_LLVM_MC_DISASSEMBLER_H
+#define LLVM_TOOLS_LLVM_MC_DISASSEMBLER_H
 
 #include <string>
 
diff --git a/tools/llvm-mc/llvm-mc.cpp b/tools/llvm-mc/llvm-mc.cpp
index 4c5b230573b2..78fe9b72f208 100644
--- a/tools/llvm-mc/llvm-mc.cpp
+++ b/tools/llvm-mc/llvm-mc.cpp
@@ -204,16 +204,15 @@ static const Target *GetTarget(const char *ProgName) {
   return TheTarget;
 }
 
-static tool_output_file *GetOutputStream() {
+static std::unique_ptr<tool_output_file> GetOutputStream() {
   if (OutputFilename == "")
     OutputFilename = "-";
 
-  std::string Err;
-  tool_output_file *Out =
-      new tool_output_file(OutputFilename.c_str(), Err, sys::fs::F_None);
-  if (!Err.empty()) {
-    errs() << Err << '\n';
-    delete Out;
+  std::error_code EC;
+  auto Out = llvm::make_unique<tool_output_file>(OutputFilename, EC,
+                                                 sys::fs::F_None);
+  if (EC) {
+    errs() << EC.message() << '\n';
     return nullptr;
   }
 
@@ -239,7 +238,7 @@ static void setDwarfDebugProducer(void) {
 }
 
 static int AsLexInput(SourceMgr &SrcMgr, MCAsmInfo &MAI,
-                      tool_output_file *Out) {
+                      raw_ostream &OS) {
 
   AsmLexer Lexer(MAI);
   Lexer.setBuffer(SrcMgr.getMemoryBuffer(SrcMgr.getMainFileID())->getBuffer());
@@ -258,60 +257,60 @@ static int AsLexInput(SourceMgr &SrcMgr, MCAsmInfo &MAI,
       Error = true; // error already printed.
       break;
     case AsmToken::Identifier:
-      Out->os() << "identifier: " << Lexer.getTok().getString();
+      OS << "identifier: " << Lexer.getTok().getString();
       break;
     case AsmToken::Integer:
-      Out->os() << "int: " << Lexer.getTok().getString();
+      OS << "int: " << Lexer.getTok().getString();
       break;
     case AsmToken::Real:
-      Out->os() << "real: " << Lexer.getTok().getString();
+      OS << "real: " << Lexer.getTok().getString();
       break;
     case AsmToken::String:
-      Out->os() << "string: " << Lexer.getTok().getString();
+      OS << "string: " << Lexer.getTok().getString();
       break;
 
-    case AsmToken::Amp:            Out->os() << "Amp"; break;
-    case AsmToken::AmpAmp:         Out->os() << "AmpAmp"; break;
-    case AsmToken::At:             Out->os() << "At"; break;
-    case AsmToken::Caret:          Out->os() << "Caret"; break;
-    case AsmToken::Colon:          Out->os() << "Colon"; break;
-    case AsmToken::Comma:          Out->os() << "Comma"; break;
-    case AsmToken::Dollar:         Out->os() << "Dollar"; break;
-    case AsmToken::Dot:            Out->os() << "Dot"; break;
-    case AsmToken::EndOfStatement: Out->os() << "EndOfStatement"; break;
-    case AsmToken::Eof:            Out->os() << "Eof"; break;
-    case AsmToken::Equal:          Out->os() << "Equal"; break;
-    case AsmToken::EqualEqual:     Out->os() << "EqualEqual"; break;
-    case AsmToken::Exclaim:        Out->os() << "Exclaim"; break;
-    case AsmToken::ExclaimEqual:   Out->os() << "ExclaimEqual"; break;
-    case AsmToken::Greater:        Out->os() << "Greater"; break;
-    case AsmToken::GreaterEqual:   Out->os() << "GreaterEqual"; break;
-    case AsmToken::GreaterGreater: Out->os() << "GreaterGreater"; break;
-    case AsmToken::Hash:           Out->os() << "Hash"; break;
-    case AsmToken::LBrac:          Out->os() << "LBrac"; break;
-    case AsmToken::LCurly:         Out->os() << "LCurly"; break;
-    case AsmToken::LParen:         Out->os() << "LParen"; break;
-    case AsmToken::Less:           Out->os() << "Less"; break;
-    case AsmToken::LessEqual:      Out->os() << "LessEqual"; break;
-    case AsmToken::LessGreater:    Out->os() << "LessGreater"; break;
-    case AsmToken::LessLess:       Out->os() << "LessLess"; break;
-    case AsmToken::Minus:          Out->os() << "Minus"; break;
-    case AsmToken::Percent:        Out->os() << "Percent"; break;
-    case AsmToken::Pipe:           Out->os() << "Pipe"; break;
-    case AsmToken::PipePipe:       Out->os() << "PipePipe"; break;
-    case AsmToken::Plus:           Out->os() << "Plus"; break;
-    case AsmToken::RBrac:          Out->os() << "RBrac"; break;
-    case AsmToken::RCurly:         Out->os() << "RCurly"; break;
-    case AsmToken::RParen:         Out->os() << "RParen"; break;
-    case AsmToken::Slash:          Out->os() << "Slash"; break;
-    case AsmToken::Star:           Out->os() << "Star"; break;
-    case AsmToken::Tilde:          Out->os() << "Tilde"; break;
+    case AsmToken::Amp:            OS << "Amp"; break;
+    case AsmToken::AmpAmp:         OS << "AmpAmp"; break;
+    case AsmToken::At:             OS << "At"; break;
+    case AsmToken::Caret:          OS << "Caret"; break;
+    case AsmToken::Colon:          OS << "Colon"; break;
+    case AsmToken::Comma:          OS << "Comma"; break;
+    case AsmToken::Dollar:         OS << "Dollar"; break;
+    case AsmToken::Dot:            OS << "Dot"; break;
+    case AsmToken::EndOfStatement: OS << "EndOfStatement"; break;
+    case AsmToken::Eof:            OS << "Eof"; break;
+    case AsmToken::Equal:          OS << "Equal"; break;
+    case AsmToken::EqualEqual:     OS << "EqualEqual"; break;
+    case AsmToken::Exclaim:        OS << "Exclaim"; break;
+    case AsmToken::ExclaimEqual:   OS << "ExclaimEqual"; break;
+    case AsmToken::Greater:        OS << "Greater"; break;
+    case AsmToken::GreaterEqual:   OS << "GreaterEqual"; break;
+    case AsmToken::GreaterGreater: OS << "GreaterGreater"; break;
+    case AsmToken::Hash:           OS << "Hash"; break;
+    case AsmToken::LBrac:          OS << "LBrac"; break;
+    case AsmToken::LCurly:         OS << "LCurly"; break;
+    case AsmToken::LParen:         OS << "LParen"; break;
+    case AsmToken::Less:           OS << "Less"; break;
+    case AsmToken::LessEqual:      OS << "LessEqual"; break;
+    case AsmToken::LessGreater:    OS << "LessGreater"; break;
+    case AsmToken::LessLess:       OS << "LessLess"; break;
+    case AsmToken::Minus:          OS << "Minus"; break;
+    case AsmToken::Percent:        OS << "Percent"; break;
+    case AsmToken::Pipe:           OS << "Pipe"; break;
+    case AsmToken::PipePipe:       OS << "PipePipe"; break;
+    case AsmToken::Plus:           OS << "Plus"; break;
+    case AsmToken::RBrac:          OS << "RBrac"; break;
+    case AsmToken::RCurly:         OS << "RCurly"; break;
+    case AsmToken::RParen:         OS << "RParen"; break;
+    case AsmToken::Slash:          OS << "Slash"; break;
+    case AsmToken::Star:           OS << "Star"; break;
+    case AsmToken::Tilde:          OS << "Tilde"; break;
     }
 
     // Print the token string.
-    Out->os() << " (\"";
-    Out->os().write_escaped(Tok.getString());
-    Out->os() << "\")\n";
+    OS << " (\"";
+    OS.write_escaped(Tok.getString());
+    OS << "\")\n";
   }
 
   return Error;
@@ -333,7 +332,7 @@ static int AssembleInput(const char *ProgName, const Target *TheTarget,
   }
 
   Parser->setShowParsedOperands(ShowInstOperands);
-  Parser->setTargetParser(*TAP.get());
+  Parser->setTargetParser(*TAP);
 
   int Res = Parser->Run(NoInitialTextSection);
 
@@ -373,12 +372,12 @@ int main(int argc, char **argv) {
     errs() << ProgName << ": " << EC.message() << '\n';
     return 1;
   }
-  MemoryBuffer *Buffer = BufferPtr->release();
+  MemoryBuffer *Buffer = BufferPtr->get();
 
   SourceMgr SrcMgr;
 
   // Tell SrcMgr about this buffer, which is what the parser will pick up.
-  SrcMgr.AddNewSourceBuffer(Buffer, SMLoc());
+  SrcMgr.AddNewSourceBuffer(std::move(*BufferPtr), SMLoc());
 
   // Record the location of the include directories so that the lexer can find
   // it later.
@@ -435,7 +434,7 @@ int main(int argc, char **argv) {
     FeaturesStr = Features.getString();
   }
 
-  std::unique_ptr<tool_output_file> Out(GetOutputStream());
+  std::unique_ptr<tool_output_file> Out = GetOutputStream();
   if (!Out)
     return 1;
 
@@ -471,16 +470,17 @@ int main(int argc, char **argv) {
     assert(FileType == OFT_ObjectFile && "Invalid file type!");
     MCCodeEmitter *CE = TheTarget->createMCCodeEmitter(*MCII, *MRI, *STI, Ctx);
     MCAsmBackend *MAB = TheTarget->createMCAsmBackend(*MRI, TripleName, MCPU);
-    Str.reset(TheTarget->createMCObjectStreamer(TripleName, Ctx, *MAB,
-                                                FOS, CE, *STI, RelaxAll,
-                                                NoExecStack));
+    Str.reset(TheTarget->createMCObjectStreamer(TripleName, Ctx, *MAB, FOS, CE,
+                                                *STI, RelaxAll));
+    if (NoExecStack)
+      Str->InitSections(true);
   }
 
   int Res = 1;
   bool disassemble = false;
   switch (Action) {
   case AC_AsLex:
-    Res = AsLexInput(SrcMgr, *MAI, Out.get());
+    Res = AsLexInput(SrcMgr, *MAI, Out->os());
     break;
   case AC_Assemble:
     Res = AssembleInput(ProgName, TheTarget, SrcMgr, Ctx, *Str, *MAI, *STI,
diff --git a/tools/llvm-mcmarkup/llvm-mcmarkup.cpp b/tools/llvm-mcmarkup/llvm-mcmarkup.cpp
index a878f1157d57..56543139d6fa 100644
--- a/tools/llvm-mcmarkup/llvm-mcmarkup.cpp
+++ b/tools/llvm-mcmarkup/llvm-mcmarkup.cpp
@@ -141,14 +141,15 @@ static void parseMCMarkup(StringRef Filename) {
     errs() << ToolName << ": " << EC.message() << '\n';
     return;
   }
-  MemoryBuffer *Buffer = BufferPtr->release();
+  std::unique_ptr<MemoryBuffer> &Buffer = BufferPtr.get();
 
   SourceMgr SrcMgr;
 
+  StringRef InputSource = Buffer->getBuffer();
+
   // Tell SrcMgr about this buffer, which is what the parser will pick up.
-  SrcMgr.AddNewSourceBuffer(Buffer, SMLoc());
+  SrcMgr.AddNewSourceBuffer(std::move(Buffer), SMLoc());
 
-  StringRef InputSource = Buffer->getBuffer();
   MarkupLexer Lex(InputSource);
   MarkupParser Parser(Lex, SrcMgr);
 
diff --git a/tools/llvm-nm/llvm-nm.cpp b/tools/llvm-nm/llvm-nm.cpp
index 15304c40b887..f911c724646c 100644
--- a/tools/llvm-nm/llvm-nm.cpp
+++ b/tools/llvm-nm/llvm-nm.cpp
@@ -36,8 +36,8 @@
 #include "llvm/Support/PrettyStackTrace.h"
 #include "llvm/Support/Program.h"
 #include "llvm/Support/Signals.h"
-#include "llvm/Support/raw_ostream.h"
 #include "llvm/Support/TargetSelect.h"
+#include "llvm/Support/raw_ostream.h"
 #include <algorithm>
 #include <cctype>
 #include <cerrno>
@@ -149,6 +149,9 @@ cl::list<std::string> SegSect("s", cl::Positional, cl::ZeroOrMore,
 cl::opt<bool> FormatMachOasHex("x", cl::desc("Print symbol entry in hex, "
                                              "Mach-O only"));
 
+cl::opt<bool> NoLLVMBitcode("no-llvm-bc",
+                            cl::desc("Disable LLVM bitcode reader"));
+
 bool PrintAddress = true;
 
 bool MultipleFiles = false;
@@ -247,12 +250,12 @@ static bool compareSymbolName(const NMSymbol &A, const NMSymbol &B) {
   }
 }
 
-static char isSymbolList64Bit(SymbolicFile *Obj) {
+static char isSymbolList64Bit(SymbolicFile &Obj) {
   if (isa<IRObjectFile>(Obj))
     return false;
   else if (isa<COFFObjectFile>(Obj))
     return false;
-  else if (MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(Obj))
+  else if (MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(&Obj))
     return MachO->is64Bit();
   else if (isa<ELF32LEObjectFile>(Obj))
     return false;
@@ -535,7 +538,9 @@ static void darwinPrintStab(MachOObjectFile *MachO, SymbolListT::iterator I) {
   outs() << Str;
 }
 
-static void sortAndPrintSymbolList(SymbolicFile *Obj, bool printName) {
+static void sortAndPrintSymbolList(SymbolicFile &Obj, bool printName,
+                                   std::string ArchiveName,
+                                   std::string ArchitectureName) {
   if (!NoSort) {
     if (NumericSort)
       std::sort(SymbolList.begin(), SymbolList.end(), compareSymbolAddress);
@@ -545,14 +550,16 @@ static void sortAndPrintSymbolList(SymbolicFile *Obj, bool printName) {
       std::sort(SymbolList.begin(), SymbolList.end(), compareSymbolName);
   }
 
-  if (OutputFormat == posix && MultipleFiles && printName) {
-    outs() << '\n' << CurrentFilename << ":\n";
-  } else if (OutputFormat == bsd && MultipleFiles && printName) {
-    outs() << "\n" << CurrentFilename << ":\n";
-  } else if (OutputFormat == sysv) {
-    outs() << "\n\nSymbols from " << CurrentFilename << ":\n\n"
-           << "Name                  Value   Class        Type"
-           << "         Size   Line  Section\n";
+  if (!PrintFileName) {
+    if (OutputFormat == posix && MultipleFiles && printName) {
+      outs() << '\n' << CurrentFilename << ":\n";
+    } else if (OutputFormat == bsd && MultipleFiles && printName) {
+      outs() << "\n" << CurrentFilename << ":\n";
+    } else if (OutputFormat == sysv) {
+      outs() << "\n\nSymbols from " << CurrentFilename << ":\n\n"
+             << "Name                  Value   Class        Type"
+             << "         Size   Line  Section\n";
+    }
   }
 
   const char *printBlanks, *printFormat;
@@ -572,7 +579,14 @@ static void sortAndPrintSymbolList(SymbolicFile *Obj, bool printName) {
       continue;
     if (SizeSort && !PrintAddress && I->Size == UnknownAddressOrSize)
       continue;
-    if (JustSymbolName) {
+    if (PrintFileName) {
+      if (!ArchitectureName.empty())
+        outs() << "(for architecture " << ArchitectureName << "):";
+      if (!ArchiveName.empty())
+        outs() << ArchiveName << ":";
+      outs() << CurrentFilename << ": ";
+    }
+    if (JustSymbolName || (UndefinedOnly && isa<MachOObjectFile>(Obj))) {
       outs() << I->Name << "\n";
       continue;
     }
@@ -596,7 +610,7 @@ static void sortAndPrintSymbolList(SymbolicFile *Obj, bool printName) {
     // nm(1) -m output or hex, else if OutputFormat is darwin or we are
     // printing Mach-O symbols in hex and not a Mach-O object fall back to
     // OutputFormat bsd (see below).
-    MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(Obj);
+    MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(&Obj);
     if ((OutputFormat == darwin || FormatMachOasHex) && MachO) {
       darwinPrintSymbol(MachO, I, SymbolAddrStr, printBlanks);
     } else if (OutputFormat == posix) {
@@ -675,7 +689,7 @@ static char getSymbolNMTypeChar(ELFObjectFile<ELFT> &Obj,
 }
 
 static char getSymbolNMTypeChar(COFFObjectFile &Obj, symbol_iterator I) {
-  const coff_symbol *Symb = Obj.getCOFFSymbol(*I);
+  COFFSymbolRef Symb = Obj.getCOFFSymbol(*I);
   // OK, this is COFF.
   symbol_iterator SymI(I);
 
@@ -692,7 +706,7 @@ static char getSymbolNMTypeChar(COFFObjectFile &Obj, symbol_iterator I) {
     return Ret;
 
   uint32_t Characteristics = 0;
-  if (!COFF::isReservedSectionNumber(Symb->SectionNumber)) {
+  if (!COFF::isReservedSectionNumber(Symb.getSectionNumber())) {
     section_iterator SecI = Obj.section_end();
     if (error(SymI->getSection(SecI)))
       return '?';
@@ -700,25 +714,21 @@ static char getSymbolNMTypeChar(COFFObjectFile &Obj, symbol_iterator I) {
     Characteristics = Section->Characteristics;
   }
 
-  switch (Symb->SectionNumber) {
+  switch (Symb.getSectionNumber()) {
   case COFF::IMAGE_SYM_DEBUG:
     return 'n';
   default:
     // Check section type.
     if (Characteristics & COFF::IMAGE_SCN_CNT_CODE)
       return 't';
-    else if (Characteristics & COFF::IMAGE_SCN_MEM_READ &&
-             ~Characteristics & COFF::IMAGE_SCN_MEM_WRITE) // Read only.
-      return 'r';
-    else if (Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA)
-      return 'd';
-    else if (Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA)
+    if (Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA)
+      return Characteristics & COFF::IMAGE_SCN_MEM_WRITE ? 'd' : 'r';
+    if (Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA)
       return 'b';
-    else if (Characteristics & COFF::IMAGE_SCN_LNK_INFO)
+    if (Characteristics & COFF::IMAGE_SCN_LNK_INFO)
       return 'i';
-
     // Check for section symbol.
-    else if (Symb->isSectionDefinition())
+    if (Symb.isSectionDefinition())
       return 's';
   }
 
@@ -783,7 +793,7 @@ static char getSymbolNMTypeChar(IRObjectFile &Obj, basic_symbol_iterator I) {
 }
 
 template <class ELFT>
-static bool isObject(ELFObjectFile<ELFT> &Obj, symbol_iterator I) {
+static bool isELFObject(ELFObjectFile<ELFT> &Obj, symbol_iterator I) {
   typedef typename ELFObjectFile<ELFT>::Elf_Sym Elf_Sym;
 
   DataRefImpl Symb = I->getRawDataRefImpl();
@@ -792,19 +802,19 @@ static bool isObject(ELFObjectFile<ELFT> &Obj, symbol_iterator I) {
   return ESym->getType() == ELF::STT_OBJECT;
 }
 
-static bool isObject(SymbolicFile *Obj, basic_symbol_iterator I) {
-  if (ELF32LEObjectFile *ELF = dyn_cast<ELF32LEObjectFile>(Obj))
-    return isObject(*ELF, I);
-  if (ELF64LEObjectFile *ELF = dyn_cast<ELF64LEObjectFile>(Obj))
-    return isObject(*ELF, I);
-  if (ELF32BEObjectFile *ELF = dyn_cast<ELF32BEObjectFile>(Obj))
-    return isObject(*ELF, I);
-  if (ELF64BEObjectFile *ELF = dyn_cast<ELF64BEObjectFile>(Obj))
-    return isObject(*ELF, I);
+static bool isObject(SymbolicFile &Obj, basic_symbol_iterator I) {
+  if (ELF32LEObjectFile *ELF = dyn_cast<ELF32LEObjectFile>(&Obj))
+    return isELFObject(*ELF, I);
+  if (ELF64LEObjectFile *ELF = dyn_cast<ELF64LEObjectFile>(&Obj))
+    return isELFObject(*ELF, I);
+  if (ELF32BEObjectFile *ELF = dyn_cast<ELF32BEObjectFile>(&Obj))
+    return isELFObject(*ELF, I);
+  if (ELF64BEObjectFile *ELF = dyn_cast<ELF64BEObjectFile>(&Obj))
+    return isELFObject(*ELF, I);
   return false;
 }
 
-static char getNMTypeChar(SymbolicFile *Obj, basic_symbol_iterator I) {
+static char getNMTypeChar(SymbolicFile &Obj, basic_symbol_iterator I) {
   uint32_t Symflags = I->getFlags();
   if ((Symflags & object::SymbolRef::SF_Weak) && !isa<MachOObjectFile>(Obj)) {
     char Ret = isObject(Obj, I) ? 'v' : 'w';
@@ -822,20 +832,20 @@ static char getNMTypeChar(SymbolicFile *Obj, basic_symbol_iterator I) {
   char Ret = '?';
   if (Symflags & object::SymbolRef::SF_Absolute)
     Ret = 'a';
-  else if (IRObjectFile *IR = dyn_cast<IRObjectFile>(Obj))
+  else if (IRObjectFile *IR = dyn_cast<IRObjectFile>(&Obj))
     Ret = getSymbolNMTypeChar(*IR, I);
-  else if (COFFObjectFile *COFF = dyn_cast<COFFObjectFile>(Obj))
+  else if (COFFObjectFile *COFF = dyn_cast<COFFObjectFile>(&Obj))
     Ret = getSymbolNMTypeChar(*COFF, I);
-  else if (MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(Obj))
+  else if (MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(&Obj))
     Ret = getSymbolNMTypeChar(*MachO, I);
-  else if (ELF32LEObjectFile *ELF = dyn_cast<ELF32LEObjectFile>(Obj))
+  else if (ELF32LEObjectFile *ELF = dyn_cast<ELF32LEObjectFile>(&Obj))
     Ret = getSymbolNMTypeChar(*ELF, I);
-  else if (ELF64LEObjectFile *ELF = dyn_cast<ELF64LEObjectFile>(Obj))
+  else if (ELF64LEObjectFile *ELF = dyn_cast<ELF64LEObjectFile>(&Obj))
     Ret = getSymbolNMTypeChar(*ELF, I);
-  else if (ELF32BEObjectFile *ELF = dyn_cast<ELF32BEObjectFile>(Obj))
+  else if (ELF32BEObjectFile *ELF = dyn_cast<ELF32BEObjectFile>(&Obj))
     Ret = getSymbolNMTypeChar(*ELF, I);
   else
-    Ret = getSymbolNMTypeChar(*cast<ELF64BEObjectFile>(Obj), I);
+    Ret = getSymbolNMTypeChar(cast<ELF64BEObjectFile>(Obj), I);
 
   if (Symflags & object::SymbolRef::SF_Global)
     Ret = toupper(Ret);
@@ -883,16 +893,19 @@ static unsigned getNsectInMachO(MachOObjectFile &Obj, basic_symbol_iterator I) {
   return 0;
 }
 
-static void dumpSymbolNamesFromObject(SymbolicFile *Obj, bool printName) {
-  basic_symbol_iterator IBegin = Obj->symbol_begin();
-  basic_symbol_iterator IEnd = Obj->symbol_end();
+static void dumpSymbolNamesFromObject(SymbolicFile &Obj, bool printName,
+                                      std::string ArchiveName = std::string(),
+                                      std::string ArchitectureName =
+                                        std::string()) {
+  basic_symbol_iterator IBegin = Obj.symbol_begin();
+  basic_symbol_iterator IEnd = Obj.symbol_end();
   if (DynamicSyms) {
-    if (!Obj->isELF()) {
-      error("File format has no dynamic symbol table", Obj->getFileName());
+    if (!Obj.isELF()) {
+      error("File format has no dynamic symbol table", Obj.getFileName());
       return;
     }
     std::pair<symbol_iterator, symbol_iterator> IDyn =
-        getELFDynamicSymbolIterators(Obj);
+        getELFDynamicSymbolIterators(&Obj);
     IBegin = IDyn.first;
     IEnd = IDyn.second;
   }
@@ -901,7 +914,7 @@ static void dumpSymbolNamesFromObject(SymbolicFile *Obj, bool printName) {
   // If a "-s segname sectname" option was specified and this is a Mach-O
   // file get the section number for that section in this object file.
   unsigned int Nsect = 0;
-  MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(Obj);
+  MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(&Obj);
   if (SegSect.size() != 0 && MachO) {
     Nsect = getNsectForSegSect(MachO);
     // If this section is not in the object file no symbols are printed.
@@ -913,7 +926,7 @@ static void dumpSymbolNamesFromObject(SymbolicFile *Obj, bool printName) {
     if (!DebugSyms && (SymFlags & SymbolRef::SF_FormatSpecific))
       continue;
     if (WithoutAliases) {
-      if (IRObjectFile *IR = dyn_cast<IRObjectFile>(Obj)) {
+      if (IRObjectFile *IR = dyn_cast<IRObjectFile>(&Obj)) {
         const GlobalValue *GV = IR->getSymbolGV(I->getRawDataRefImpl());
         if (GV && isa<GlobalAlias>(GV))
           continue;
@@ -950,8 +963,8 @@ static void dumpSymbolNamesFromObject(SymbolicFile *Obj, bool printName) {
     P += strlen(P) + 1;
   }
 
-  CurrentFilename = Obj->getFileName();
-  sortAndPrintSymbolList(Obj, printName);
+  CurrentFilename = Obj.getFileName();
+  sortAndPrintSymbolList(Obj, printName, ArchiveName, ArchitectureName);
 }
 
 // checkMachOAndArchFlags() checks to see if the SymbolicFile is a Mach-O file
@@ -995,13 +1008,13 @@ static void dumpSymbolNamesFromFile(std::string &Filename) {
     return;
 
   LLVMContext &Context = getGlobalContext();
-  ErrorOr<Binary *> BinaryOrErr =
-      createBinary(std::move(*BufferOrErr), &Context);
+  ErrorOr<std::unique_ptr<Binary>> BinaryOrErr = createBinary(
+      BufferOrErr.get()->getMemBufferRef(), NoLLVMBitcode ? nullptr : &Context);
   if (error(BinaryOrErr.getError(), Filename))
     return;
-  std::unique_ptr<Binary> Bin(BinaryOrErr.get());
+  Binary &Bin = *BinaryOrErr.get();
 
-  if (Archive *A = dyn_cast<Archive>(Bin.get())) {
+  if (Archive *A = dyn_cast<Archive>(&Bin)) {
     if (ArchiveMap) {
       Archive::symbol_iterator I = A->symbol_begin();
       Archive::symbol_iterator E = A->symbol_end();
@@ -1029,18 +1042,20 @@ static void dumpSymbolNamesFromFile(std::string &Filename) {
       if (SymbolicFile *O = dyn_cast<SymbolicFile>(&*ChildOrErr.get())) {
         if (!checkMachOAndArchFlags(O, Filename))
           return;
-        outs() << "\n";
-        if (isa<MachOObjectFile>(O)) {
-          outs() << Filename << "(" << O->getFileName() << ")";
-        } else
-          outs() << O->getFileName();
-        outs() << ":\n";
-        dumpSymbolNamesFromObject(O, false);
+        if (!PrintFileName) {
+          outs() << "\n";
+          if (isa<MachOObjectFile>(O)) {
+            outs() << Filename << "(" << O->getFileName() << ")";
+          } else
+            outs() << O->getFileName();
+          outs() << ":\n";
+        }
+        dumpSymbolNamesFromObject(*O, false, Filename);
       }
     }
     return;
   }
-  if (MachOUniversalBinary *UB = dyn_cast<MachOUniversalBinary>(Bin.get())) {
+  if (MachOUniversalBinary *UB = dyn_cast<MachOUniversalBinary>(&Bin)) {
     // If we have a list of architecture flags specified dump only those.
     if (!ArchAll && ArchFlags.size() != 0) {
       // Look for a slice in the universal binary that matches each ArchFlag.
@@ -1054,16 +1069,25 @@ static void dumpSymbolNamesFromFile(std::string &Filename) {
             ArchFound = true;
             ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr =
                 I->getAsObjectFile();
-            std::unique_ptr<Archive> A;
+            std::string ArchiveName;
+            std::string ArchitectureName;
+            ArchiveName.clear();
+            ArchitectureName.clear();
             if (ObjOrErr) {
-              std::unique_ptr<ObjectFile> Obj = std::move(ObjOrErr.get());
+              ObjectFile &Obj = *ObjOrErr.get();
               if (ArchFlags.size() > 1) {
-                outs() << "\n" << Obj->getFileName() << " (for architecture "
-                       << I->getArchTypeName() << ")"
-                       << ":\n";
+                if (PrintFileName)
+                  ArchitectureName = I->getArchTypeName();
+                else
+                  outs() << "\n" << Obj.getFileName() << " (for architecture "
+                         << I->getArchTypeName() << ")"
+                         << ":\n";
               }
-              dumpSymbolNamesFromObject(Obj.get(), false);
-            } else if (!I->getAsArchive(A)) {
+              dumpSymbolNamesFromObject(Obj, false, ArchiveName,
+                                        ArchitectureName);
+            } else if (ErrorOr<std::unique_ptr<Archive>> AOrErr =
+                           I->getAsArchive()) {
+              std::unique_ptr<Archive> &A = *AOrErr;
               for (Archive::child_iterator AI = A->child_begin(),
                                            AE = A->child_end();
                    AI != AE; ++AI) {
@@ -1073,14 +1097,21 @@ static void dumpSymbolNamesFromFile(std::string &Filename) {
                   continue;
                 if (SymbolicFile *O =
                         dyn_cast<SymbolicFile>(&*ChildOrErr.get())) {
-                  outs() << "\n" << A->getFileName();
-                  outs() << "(" << O->getFileName() << ")";
-                  if (ArchFlags.size() > 1) {
-                    outs() << " (for architecture " << I->getArchTypeName()
-                           << ")";
+                  if (PrintFileName) {
+                    ArchiveName = A->getFileName();
+                    if (ArchFlags.size() > 1)
+                      ArchitectureName = I->getArchTypeName();
+                  } else {
+                    outs() << "\n" << A->getFileName();
+                    outs() << "(" << O->getFileName() << ")";
+                    if (ArchFlags.size() > 1) {
+                      outs() << " (for architecture " << I->getArchTypeName()
+                             << ")";
+                    }
+                    outs() << ":\n";
                   }
-                  outs() << ":\n";
-                  dumpSymbolNamesFromObject(O, false);
+                  dumpSymbolNamesFromObject(*O, false, ArchiveName,
+                                            ArchitectureName);
                 }
               }
             }
@@ -1103,11 +1134,14 @@ static void dumpSymbolNamesFromFile(std::string &Filename) {
            I != E; ++I) {
         if (HostArchName == I->getArchTypeName()) {
           ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr = I->getAsObjectFile();
-          std::unique_ptr<Archive> A;
+          std::string ArchiveName;
+          ArchiveName.clear();
           if (ObjOrErr) {
-            std::unique_ptr<ObjectFile> Obj = std::move(ObjOrErr.get());
-            dumpSymbolNamesFromObject(Obj.get(), false);
-          } else if (!I->getAsArchive(A)) {
+            ObjectFile &Obj = *ObjOrErr.get();
+            dumpSymbolNamesFromObject(Obj, false);
+          } else if (ErrorOr<std::unique_ptr<Archive>> AOrErr =
+                         I->getAsArchive()) {
+            std::unique_ptr<Archive> &A = *AOrErr;
             for (Archive::child_iterator AI = A->child_begin(),
                                          AE = A->child_end();
                  AI != AE; ++AI) {
@@ -1117,10 +1151,13 @@ static void dumpSymbolNamesFromFile(std::string &Filename) {
                 continue;
               if (SymbolicFile *O =
                       dyn_cast<SymbolicFile>(&*ChildOrErr.get())) {
-                outs() << "\n" << A->getFileName() << "(" << O->getFileName()
-                       << ")"
-                       << ":\n";
-                dumpSymbolNamesFromObject(O, false);
+                if (PrintFileName)
+                  ArchiveName = A->getFileName();
+                else
+                  outs() << "\n" << A->getFileName() << "(" << O->getFileName()
+                         << ")"
+                         << ":\n";
+                dumpSymbolNamesFromObject(*O, false, ArchiveName);
               }
             }
           }
@@ -1135,17 +1172,26 @@ static void dumpSymbolNamesFromFile(std::string &Filename) {
                                                E = UB->end_objects();
          I != E; ++I) {
       ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr = I->getAsObjectFile();
-      std::unique_ptr<Archive> A;
+      std::string ArchiveName;
+      std::string ArchitectureName;
+      ArchiveName.clear();
+      ArchitectureName.clear();
       if (ObjOrErr) {
-        std::unique_ptr<ObjectFile> Obj = std::move(ObjOrErr.get());
-        if (moreThanOneArch)
-          outs() << "\n";
-        outs() << Obj->getFileName();
-        if (isa<MachOObjectFile>(Obj.get()) && moreThanOneArch)
-          outs() << " (for architecture " << I->getArchTypeName() << ")";
-        outs() << ":\n";
-        dumpSymbolNamesFromObject(Obj.get(), false);
-      } else if (!I->getAsArchive(A)) {
+        ObjectFile &Obj = *ObjOrErr.get();
+        if (PrintFileName) {
+          if (isa<MachOObjectFile>(Obj) && moreThanOneArch)
+            ArchitectureName = I->getArchTypeName();
+        } else {
+          if (moreThanOneArch)
+            outs() << "\n";
+          outs() << Obj.getFileName();
+          if (isa<MachOObjectFile>(Obj) && moreThanOneArch)
+            outs() << " (for architecture " << I->getArchTypeName() << ")";
+          outs() << ":\n";
+        }
+        dumpSymbolNamesFromObject(Obj, false, ArchiveName, ArchitectureName);
+      } else if (ErrorOr<std::unique_ptr<Archive>> AOrErr = I->getAsArchive()) {
+        std::unique_ptr<Archive> &A = *AOrErr;
         for (Archive::child_iterator AI = A->child_begin(), AE = A->child_end();
              AI != AE; ++AI) {
           ErrorOr<std::unique_ptr<Binary>> ChildOrErr =
@@ -1153,25 +1199,32 @@ static void dumpSymbolNamesFromFile(std::string &Filename) {
           if (ChildOrErr.getError())
             continue;
           if (SymbolicFile *O = dyn_cast<SymbolicFile>(&*ChildOrErr.get())) {
-            outs() << "\n" << A->getFileName();
-            if (isa<MachOObjectFile>(O)) {
-              outs() << "(" << O->getFileName() << ")";
-              if (moreThanOneArch)
-                outs() << " (for architecture " << I->getArchTypeName() << ")";
-            } else
-              outs() << ":" << O->getFileName();
-            outs() << ":\n";
-            dumpSymbolNamesFromObject(O, false);
+            if (PrintFileName) {
+              ArchiveName = A->getFileName();
+              if (isa<MachOObjectFile>(O) && moreThanOneArch)
+                ArchitectureName = I->getArchTypeName();
+            } else {
+              outs() << "\n" << A->getFileName();
+              if (isa<MachOObjectFile>(O)) {
+                outs() << "(" << O->getFileName() << ")";
+                if (moreThanOneArch)
+                  outs() << " (for architecture " << I->getArchTypeName()
+                         << ")";
+              } else
+                outs() << ":" << O->getFileName();
+              outs() << ":\n";
+            }
+            dumpSymbolNamesFromObject(*O, false, ArchiveName, ArchitectureName);
           }
         }
       }
     }
     return;
   }
-  if (SymbolicFile *O = dyn_cast<SymbolicFile>(Bin.get())) {
+  if (SymbolicFile *O = dyn_cast<SymbolicFile>(&Bin)) {
     if (!checkMachOAndArchFlags(O, Filename))
       return;
-    dumpSymbolNamesFromObject(O, true);
+    dumpSymbolNamesFromObject(*O, true);
     return;
   }
   error("unrecognizable file type", Filename);
@@ -1223,8 +1276,7 @@ int main(int argc, char **argv) {
     if (ArchFlags[i] == "all") {
       ArchAll = true;
     } else {
-      Triple T = MachOObjectFile::getArch(ArchFlags[i]);
-      if (T.getArch() == Triple::UnknownArch)
+      if (!MachOObjectFile::isValidArch(ArchFlags[i]))
         error("Unknown architecture named '" + ArchFlags[i] + "'",
               "for the -arch option");
     }
diff --git a/tools/llvm-objdump/CMakeLists.txt b/tools/llvm-objdump/CMakeLists.txt
index d63602bd0189..61bf3b32757b 100644
--- a/tools/llvm-objdump/CMakeLists.txt
+++ b/tools/llvm-objdump/CMakeLists.txt
@@ -2,7 +2,7 @@ set(LLVM_LINK_COMPONENTS
   ${LLVM_TARGETS_TO_BUILD}
   DebugInfo
   MC
-  MCAnalysis
+  MCDisassembler
   Object
   Support
   )
diff --git a/tools/llvm-objdump/COFFDump.cpp b/tools/llvm-objdump/COFFDump.cpp
index 39d8e8e39f8c..4a20b91b71fb 100644
--- a/tools/llvm-objdump/COFFDump.cpp
+++ b/tools/llvm-objdump/COFFDump.cpp
@@ -260,11 +260,8 @@ static void printLoadConfiguration(const COFFObjectFile *Obj) {
   if (!PE32Header)
     return;
 
-  const coff_file_header *Header;
-  if (error(Obj->getCOFFHeader(Header)))
-    return;
   // Currently only x86 is supported
-  if (Header->Machine != COFF::IMAGE_FILE_MACHINE_I386)
+  if (Obj->getMachine() != COFF::IMAGE_FILE_MACHINE_I386)
     return;
 
   const data_directory *DataDir;
@@ -325,7 +322,7 @@ static void printImportTables(const COFFObjectFile *Obj) {
     const import_lookup_table_entry32 *entry;
     if (I->getImportLookupEntry(entry))
       return;
-    for (; entry->data; ++entry) {
+    for (; entry->Data; ++entry) {
       if (entry->isOrdinal()) {
         outs() << format("      % 6d\n", entry->getOrdinal());
         continue;
@@ -518,11 +515,7 @@ static void printRuntimeFunctionRels(const COFFObjectFile *Obj,
 }
 
 void llvm::printCOFFUnwindInfo(const COFFObjectFile *Obj) {
-  const coff_file_header *Header;
-  if (error(Obj->getCOFFHeader(Header)))
-    return;
-
-  if (Header->Machine != COFF::IMAGE_FILE_MACHINE_AMD64) {
+  if (Obj->getMachine() != COFF::IMAGE_FILE_MACHINE_AMD64) {
     errs() << "Unsupported image machine type "
               "(currently only AMD64 is supported).\n";
     return;
diff --git a/tools/llvm-objdump/LLVMBuild.txt b/tools/llvm-objdump/LLVMBuild.txt
index d9c09b60034a..d16c501a6cca 100644
--- a/tools/llvm-objdump/LLVMBuild.txt
+++ b/tools/llvm-objdump/LLVMBuild.txt
@@ -19,4 +19,4 @@
 type = Tool
 name = llvm-objdump
 parent = Tools
-required_libraries = DebugInfo MC MCAnalysis MCDisassembler MCParser Object all-targets
+required_libraries = DebugInfo MC MCDisassembler MCParser Object all-targets
diff --git a/tools/llvm-objdump/MachODump.cpp b/tools/llvm-objdump/MachODump.cpp
index 4b46ac4fc0b9..03fad5f922fc 100644
--- a/tools/llvm-objdump/MachODump.cpp
+++ b/tools/llvm-objdump/MachODump.cpp
@@ -12,25 +12,29 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm-objdump.h"
+#include "llvm-c/Disassembler.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/Triple.h"
+#include "llvm/Config/config.h"
 #include "llvm/DebugInfo/DIContext.h"
 #include "llvm/MC/MCAsmInfo.h"
 #include "llvm/MC/MCContext.h"
 #include "llvm/MC/MCDisassembler.h"
 #include "llvm/MC/MCInst.h"
 #include "llvm/MC/MCInstPrinter.h"
-#include "llvm/MC/MCInstrAnalysis.h"
 #include "llvm/MC/MCInstrDesc.h"
 #include "llvm/MC/MCInstrInfo.h"
 #include "llvm/MC/MCRegisterInfo.h"
 #include "llvm/MC/MCSubtargetInfo.h"
 #include "llvm/Object/MachO.h"
+#include "llvm/Object/MachOUniversal.h"
 #include "llvm/Support/Casting.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Debug.h"
+#include "llvm/Support/Endian.h"
 #include "llvm/Support/Format.h"
+#include "llvm/Support/FormattedStream.h"
 #include "llvm/Support/GraphWriter.h"
 #include "llvm/Support/MachO.h"
 #include "llvm/Support/MemoryBuffer.h"
@@ -40,31 +44,67 @@
 #include <algorithm>
 #include <cstring>
 #include <system_error>
+
+#if HAVE_CXXABI_H
+#include <cxxabi.h>
+#endif
+
 using namespace llvm;
 using namespace object;
 
 static cl::opt<bool>
-  UseDbg("g", cl::desc("Print line information from debug info if available"));
+    UseDbg("g",
+           cl::desc("Print line information from debug info if available"));
+
+static cl::opt<std::string> DSYMFile("dsym",
+                                     cl::desc("Use .dSYM file for debug info"));
+
+static cl::opt<bool> FullLeadingAddr("full-leading-addr",
+                                     cl::desc("Print full leading address"));
+
+static cl::opt<bool>
+    PrintImmHex("print-imm-hex",
+                cl::desc("Use hex format for immediate values"));
 
-static cl::opt<std::string>
-  DSYMFile("dsym", cl::desc("Use .dSYM file for debug info"));
+cl::opt<bool>
+    llvm::UniversalHeaders("universal-headers",
+                           cl::desc("Print Mach-O universal headers"));
 
-static const Target *GetTarget(const MachOObjectFile *MachOObj) {
+static cl::list<std::string>
+    ArchFlags("arch", cl::desc("architecture(s) from a Mach-O file to dump"),
+              cl::ZeroOrMore);
+bool ArchAll = false;
+
+static std::string ThumbTripleName;
+
+static const Target *GetTarget(const MachOObjectFile *MachOObj,
+                               const char **McpuDefault,
+                               const Target **ThumbTarget) {
   // Figure out the target triple.
   if (TripleName.empty()) {
     llvm::Triple TT("unknown-unknown-unknown");
-    TT.setArch(Triple::ArchType(MachOObj->getArch()));
+    llvm::Triple ThumbTriple = Triple();
+    TT = MachOObj->getArch(McpuDefault, &ThumbTriple);
     TripleName = TT.str();
+    ThumbTripleName = ThumbTriple.str();
   }
 
   // Get the target specific parser.
   std::string Error;
   const Target *TheTarget = TargetRegistry::lookupTarget(TripleName, Error);
-  if (TheTarget)
+  if (TheTarget && ThumbTripleName.empty())
+    return TheTarget;
+
+  *ThumbTarget = TargetRegistry::lookupTarget(ThumbTripleName, Error);
+  if (*ThumbTarget)
     return TheTarget;
 
-  errs() << "llvm-objdump: error: unable to get target for '" << TripleName
-         << "', see --version and --triple.\n";
+  errs() << "llvm-objdump: error: unable to get target for '";
+  if (!TheTarget)
+    errs() << TripleName;
+  else
+    errs() << ThumbTripleName;
+  errs() << "', see --version and --triple.\n";
   return nullptr;
 }
 
@@ -93,58 +133,80 @@ typedef std::pair<uint64_t, DiceRef> DiceTableEntry;
 typedef std::vector<DiceTableEntry> DiceTable;
 typedef DiceTable::iterator dice_table_iterator;
 
-static bool
-compareDiceTableEntries(const DiceTableEntry i,
-                        const DiceTableEntry j) {
-  return i.first == j.first;
+// This is used to search for a data in code table entry for the PC being
+// disassembled.  The j parameter has the PC in j.first.  A single data in code
+// table entry can cover many bytes for each of its Kind's.  So if the offset,
+// aka the i.first value, of the data in code table entry plus its Length
+// covers the PC being searched for this will return true.  If not it will
+// return false.
+static bool compareDiceTableEntries(const DiceTableEntry &i,
+                                    const DiceTableEntry &j) {
+  uint16_t Length;
+  i.second.getLength(Length);
+
+  return j.first >= i.first && j.first < i.first + Length;
 }
 
-static void DumpDataInCode(const char *bytes, uint64_t Size,
-                           unsigned short Kind) {
-  uint64_t Value;
+static uint64_t DumpDataInCode(const char *bytes, uint64_t Length,
+                               unsigned short Kind) {
+  uint32_t Value, Size = 1;
 
   switch (Kind) {
+  default:
   case MachO::DICE_KIND_DATA:
-    switch (Size) {
-    case 4:
-      Value = bytes[3] << 24 |
-              bytes[2] << 16 |
-              bytes[1] << 8 |
-              bytes[0];
+    if (Length >= 4) {
+      if (!NoShowRawInsn)
+        DumpBytes(StringRef(bytes, 4));
+      Value = bytes[3] << 24 | bytes[2] << 16 | bytes[1] << 8 | bytes[0];
       outs() << "\t.long " << Value;
-      break;
-    case 2:
-      Value = bytes[1] << 8 |
-              bytes[0];
+      Size = 4;
+    } else if (Length >= 2) {
+      if (!NoShowRawInsn)
+        DumpBytes(StringRef(bytes, 2));
+      Value = bytes[1] << 8 | bytes[0];
       outs() << "\t.short " << Value;
-      break;
-    case 1:
+      Size = 2;
+    } else {
+      if (!NoShowRawInsn)
+        DumpBytes(StringRef(bytes, 2));
       Value = bytes[0];
       outs() << "\t.byte " << Value;
-      break;
+      Size = 1;
     }
-    outs() << "\t@ KIND_DATA\n";
+    if (Kind == MachO::DICE_KIND_DATA)
+      outs() << "\t@ KIND_DATA\n";
+    else
+      outs() << "\t@ data in code kind = " << Kind << "\n";
     break;
   case MachO::DICE_KIND_JUMP_TABLE8:
+    if (!NoShowRawInsn)
+      DumpBytes(StringRef(bytes, 1));
     Value = bytes[0];
-    outs() << "\t.byte " << Value << "\t@ KIND_JUMP_TABLE8";
+    outs() << "\t.byte " << format("%3u", Value) << "\t@ KIND_JUMP_TABLE8\n";
+    Size = 1;
     break;
   case MachO::DICE_KIND_JUMP_TABLE16:
-    Value = bytes[1] << 8 |
-            bytes[0];
-    outs() << "\t.short " << Value << "\t@ KIND_JUMP_TABLE16";
+    if (!NoShowRawInsn)
+      DumpBytes(StringRef(bytes, 2));
+    Value = bytes[1] << 8 | bytes[0];
+    outs() << "\t.short " << format("%5u", Value & 0xffff)
+           << "\t@ KIND_JUMP_TABLE16\n";
+    Size = 2;
     break;
   case MachO::DICE_KIND_JUMP_TABLE32:
-    Value = bytes[3] << 24 |
-            bytes[2] << 16 |
-            bytes[1] << 8 |
-            bytes[0];
-    outs() << "\t.long " << Value << "\t@ KIND_JUMP_TABLE32";
-    break;
-  default:
-    outs() << "\t@ data in code kind = " << Kind << "\n";
+  case MachO::DICE_KIND_ABS_JUMP_TABLE32:
+    if (!NoShowRawInsn)
+      DumpBytes(StringRef(bytes, 4));
+    Value = bytes[3] << 24 | bytes[2] << 16 | bytes[1] << 8 | bytes[0];
+    outs() << "\t.long " << Value;
+    if (Kind == MachO::DICE_KIND_JUMP_TABLE32)
+      outs() << "\t@ KIND_JUMP_TABLE32\n";
+    else
+      outs() << "\t@ KIND_ABS_JUMP_TABLE32\n";
+    Size = 4;
     break;
   }
+  return Size;
 }
 
 static void getSectionsAndSymbols(const MachO::mach_header Header,
@@ -153,8 +215,12 @@ static void getSectionsAndSymbols(const MachO::mach_header Header,
                                   std::vector<SymbolRef> &Symbols,
                                   SmallVectorImpl<uint64_t> &FoundFns,
                                   uint64_t &BaseSegmentAddress) {
-  for (const SymbolRef &Symbol : MachOObj->symbols())
-    Symbols.push_back(Symbol);
+  for (const SymbolRef &Symbol : MachOObj->symbols()) {
+    StringRef SymName;
+    Symbol.getName(SymName);
+    if (!SymName.startswith("ltmp"))
+      Symbols.push_back(Symbol);
+  }
 
   for (const SectionRef &Section : MachOObj->sections()) {
     StringRef SectName;
@@ -165,20 +231,18 @@ static void getSectionsAndSymbols(const MachO::mach_header Header,
   MachOObjectFile::LoadCommandInfo Command =
       MachOObj->getFirstLoadCommandInfo();
   bool BaseSegmentAddressSet = false;
-  for (unsigned i = 0; ; ++i) {
+  for (unsigned i = 0;; ++i) {
     if (Command.C.cmd == MachO::LC_FUNCTION_STARTS) {
       // We found a function starts segment, parse the addresses for later
       // consumption.
       MachO::linkedit_data_command LLC =
-        MachOObj->getLinkeditDataLoadCommand(Command);
+          MachOObj->getLinkeditDataLoadCommand(Command);
 
       MachOObj->ReadULEB128s(LLC.dataoff, FoundFns);
-    }
-    else if (Command.C.cmd == MachO::LC_SEGMENT) {
-      MachO::segment_command SLC =
-        MachOObj->getSegmentLoadCommand(Command);
+    } else if (Command.C.cmd == MachO::LC_SEGMENT) {
+      MachO::segment_command SLC = MachOObj->getSegmentLoadCommand(Command);
       StringRef SegName = SLC.segname;
-      if(!BaseSegmentAddressSet && SegName != "__PAGEZERO") {
+      if (!BaseSegmentAddressSet && SegName != "__PAGEZERO") {
         BaseSegmentAddressSet = true;
         BaseSegmentAddress = SLC.vmaddr;
       }
@@ -191,33 +255,1792 @@ static void getSectionsAndSymbols(const MachO::mach_header Header,
   }
 }
 
-static void DisassembleInputMachO2(StringRef Filename,
-                                   MachOObjectFile *MachOOF);
+// checkMachOAndArchFlags() checks to see if the ObjectFile is a Mach-O file
+// and if it is and there is a list of architecture flags is specified then
+// check to make sure this Mach-O file is one of those architectures or all
+// architectures were specified.  If not then an error is generated and this
+// routine returns false.  Else it returns true.
+static bool checkMachOAndArchFlags(ObjectFile *O, StringRef Filename) {
+  if (isa<MachOObjectFile>(O) && !ArchAll && ArchFlags.size() != 0) {
+    MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(O);
+    bool ArchFound = false;
+    MachO::mach_header H;
+    MachO::mach_header_64 H_64;
+    Triple T;
+    if (MachO->is64Bit()) {
+      H_64 = MachO->MachOObjectFile::getHeader64();
+      T = MachOObjectFile::getArch(H_64.cputype, H_64.cpusubtype);
+    } else {
+      H = MachO->MachOObjectFile::getHeader();
+      T = MachOObjectFile::getArch(H.cputype, H.cpusubtype);
+    }
+    unsigned i;
+    for (i = 0; i < ArchFlags.size(); ++i) {
+      if (ArchFlags[i] == T.getArchName())
+        ArchFound = true;
+      break;
+    }
+    if (!ArchFound) {
+      errs() << "llvm-objdump: file: " + Filename + " does not contain "
+             << "architecture: " + ArchFlags[i] + "\n";
+      return false;
+    }
+  }
+  return true;
+}
+
+static void DisassembleMachO(StringRef Filename, MachOObjectFile *MachOOF);
+
+// ProcessMachO() is passed a single opened Mach-O file, which may be an
+// archive member and or in a slice of a universal file.  It prints the
+// the file name and header info and then processes it according to the
+// command line options.
+static void ProcessMachO(StringRef Filename, MachOObjectFile *MachOOF,
+                         StringRef ArchiveMemberName = StringRef(),
+                         StringRef ArchitectureName = StringRef()) {
+  // If we are doing some processing here on the Mach-O file print the header
+  // info.  And don't print it otherwise like in the case of printing the
+  // UniversalHeaders.
+  if (Disassemble || PrivateHeaders || ExportsTrie || Rebase || Bind ||
+      LazyBind || WeakBind) {
+    outs() << Filename;
+    if (!ArchiveMemberName.empty())
+      outs() << '(' << ArchiveMemberName << ')';
+    if (!ArchitectureName.empty())
+      outs() << " (architecture " << ArchitectureName << ")";
+    outs() << ":\n";
+  }
+
+  if (Disassemble)
+    DisassembleMachO(Filename, MachOOF);
+  // TODO: These should/could be printed in Darwin's otool(1) or nm(1) style
+  //       for -macho. Or just used a new option that maps to the otool(1)
+  //       option like -r, -l, etc.  Or just the normal llvm-objdump option
+  //       but now for this slice so that the -arch options can be used.
+  // if (Relocations)
+  //   PrintRelocations(MachOOF);
+  // if (SectionHeaders)
+  //   PrintSectionHeaders(MachOOF);
+  // if (SectionContents)
+  //   PrintSectionContents(MachOOF);
+  // if (SymbolTable)
+  //   PrintSymbolTable(MachOOF);
+  // if (UnwindInfo)
+  //   PrintUnwindInfo(MachOOF);
+  if (PrivateHeaders)
+    printMachOFileHeader(MachOOF);
+  if (ExportsTrie)
+    printExportsTrie(MachOOF);
+  if (Rebase)
+    printRebaseTable(MachOOF);
+  if (Bind)
+    printBindTable(MachOOF);
+  if (LazyBind)
+    printLazyBindTable(MachOOF);
+  if (WeakBind)
+    printWeakBindTable(MachOOF);
+}
+
+// printUnknownCPUType() helps print_fat_headers for unknown CPU's.
+static void printUnknownCPUType(uint32_t cputype, uint32_t cpusubtype) {
+  outs() << "    cputype (" << cputype << ")\n";
+  outs() << "    cpusubtype (" << cpusubtype << ")\n";
+}
+
+// printCPUType() helps print_fat_headers by printing the cputype and
+// pusubtype (symbolically for the one's it knows about).
+static void printCPUType(uint32_t cputype, uint32_t cpusubtype) {
+  switch (cputype) {
+  case MachO::CPU_TYPE_I386:
+    switch (cpusubtype) {
+    case MachO::CPU_SUBTYPE_I386_ALL:
+      outs() << "    cputype CPU_TYPE_I386\n";
+      outs() << "    cpusubtype CPU_SUBTYPE_I386_ALL\n";
+      break;
+    default:
+      printUnknownCPUType(cputype, cpusubtype);
+      break;
+    }
+    break;
+  case MachO::CPU_TYPE_X86_64:
+    switch (cpusubtype) {
+    case MachO::CPU_SUBTYPE_X86_64_ALL:
+      outs() << "    cputype CPU_TYPE_X86_64\n";
+      outs() << "    cpusubtype CPU_SUBTYPE_X86_64_ALL\n";
+      break;
+    case MachO::CPU_SUBTYPE_X86_64_H:
+      outs() << "    cputype CPU_TYPE_X86_64\n";
+      outs() << "    cpusubtype CPU_SUBTYPE_X86_64_H\n";
+      break;
+    default:
+      printUnknownCPUType(cputype, cpusubtype);
+      break;
+    }
+    break;
+  case MachO::CPU_TYPE_ARM:
+    switch (cpusubtype) {
+    case MachO::CPU_SUBTYPE_ARM_ALL:
+      outs() << "    cputype CPU_TYPE_ARM\n";
+      outs() << "    cpusubtype CPU_SUBTYPE_ARM_ALL\n";
+      break;
+    case MachO::CPU_SUBTYPE_ARM_V4T:
+      outs() << "    cputype CPU_TYPE_ARM\n";
+      outs() << "    cpusubtype CPU_SUBTYPE_ARM_V4T\n";
+      break;
+    case MachO::CPU_SUBTYPE_ARM_V5TEJ:
+      outs() << "    cputype CPU_TYPE_ARM\n";
+      outs() << "    cpusubtype CPU_SUBTYPE_ARM_V5TEJ\n";
+      break;
+    case MachO::CPU_SUBTYPE_ARM_XSCALE:
+      outs() << "    cputype CPU_TYPE_ARM\n";
+      outs() << "    cpusubtype CPU_SUBTYPE_ARM_XSCALE\n";
+      break;
+    case MachO::CPU_SUBTYPE_ARM_V6:
+      outs() << "    cputype CPU_TYPE_ARM\n";
+      outs() << "    cpusubtype CPU_SUBTYPE_ARM_V6\n";
+      break;
+    case MachO::CPU_SUBTYPE_ARM_V6M:
+      outs() << "    cputype CPU_TYPE_ARM\n";
+      outs() << "    cpusubtype CPU_SUBTYPE_ARM_V6M\n";
+      break;
+    case MachO::CPU_SUBTYPE_ARM_V7:
+      outs() << "    cputype CPU_TYPE_ARM\n";
+      outs() << "    cpusubtype CPU_SUBTYPE_ARM_V7\n";
+      break;
+    case MachO::CPU_SUBTYPE_ARM_V7EM:
+      outs() << "    cputype CPU_TYPE_ARM\n";
+      outs() << "    cpusubtype CPU_SUBTYPE_ARM_V7EM\n";
+      break;
+    case MachO::CPU_SUBTYPE_ARM_V7K:
+      outs() << "    cputype CPU_TYPE_ARM\n";
+      outs() << "    cpusubtype CPU_SUBTYPE_ARM_V7K\n";
+      break;
+    case MachO::CPU_SUBTYPE_ARM_V7M:
+      outs() << "    cputype CPU_TYPE_ARM\n";
+      outs() << "    cpusubtype CPU_SUBTYPE_ARM_V7M\n";
+      break;
+    case MachO::CPU_SUBTYPE_ARM_V7S:
+      outs() << "    cputype CPU_TYPE_ARM\n";
+      outs() << "    cpusubtype CPU_SUBTYPE_ARM_V7S\n";
+      break;
+    default:
+      printUnknownCPUType(cputype, cpusubtype);
+      break;
+    }
+    break;
+  case MachO::CPU_TYPE_ARM64:
+    switch (cpusubtype & ~MachO::CPU_SUBTYPE_MASK) {
+    case MachO::CPU_SUBTYPE_ARM64_ALL:
+      outs() << "    cputype CPU_TYPE_ARM64\n";
+      outs() << "    cpusubtype CPU_SUBTYPE_ARM64_ALL\n";
+      break;
+    default:
+      printUnknownCPUType(cputype, cpusubtype);
+      break;
+    }
+    break;
+  default:
+    printUnknownCPUType(cputype, cpusubtype);
+    break;
+  }
+}
+
+static void printMachOUniversalHeaders(const object::MachOUniversalBinary *UB,
+                                       bool verbose) {
+  outs() << "Fat headers\n";
+  if (verbose)
+    outs() << "fat_magic FAT_MAGIC\n";
+  else
+    outs() << "fat_magic " << format("0x%" PRIx32, MachO::FAT_MAGIC) << "\n";
 
-void llvm::DisassembleInputMachO(StringRef Filename) {
-  ErrorOr<std::unique_ptr<MemoryBuffer>> Buff =
-      MemoryBuffer::getFileOrSTDIN(Filename);
-  if (std::error_code EC = Buff.getError()) {
-    errs() << "llvm-objdump: " << Filename << ": " << EC.message() << "\n";
+  uint32_t nfat_arch = UB->getNumberOfObjects();
+  StringRef Buf = UB->getData();
+  uint64_t size = Buf.size();
+  uint64_t big_size = sizeof(struct MachO::fat_header) +
+                      nfat_arch * sizeof(struct MachO::fat_arch);
+  outs() << "nfat_arch " << UB->getNumberOfObjects();
+  if (nfat_arch == 0)
+    outs() << " (malformed, contains zero architecture types)\n";
+  else if (big_size > size)
+    outs() << " (malformed, architectures past end of file)\n";
+  else
+    outs() << "\n";
+
+  for (uint32_t i = 0; i < nfat_arch; ++i) {
+    MachOUniversalBinary::ObjectForArch OFA(UB, i);
+    uint32_t cputype = OFA.getCPUType();
+    uint32_t cpusubtype = OFA.getCPUSubType();
+    outs() << "architecture ";
+    for (uint32_t j = 0; i != 0 && j <= i - 1; j++) {
+      MachOUniversalBinary::ObjectForArch other_OFA(UB, j);
+      uint32_t other_cputype = other_OFA.getCPUType();
+      uint32_t other_cpusubtype = other_OFA.getCPUSubType();
+      if (cputype != 0 && cpusubtype != 0 && cputype == other_cputype &&
+          (cpusubtype & ~MachO::CPU_SUBTYPE_MASK) ==
+              (other_cpusubtype & ~MachO::CPU_SUBTYPE_MASK)) {
+        outs() << "(illegal duplicate architecture) ";
+        break;
+      }
+    }
+    if (verbose) {
+      outs() << OFA.getArchTypeName() << "\n";
+      printCPUType(cputype, cpusubtype & ~MachO::CPU_SUBTYPE_MASK);
+    } else {
+      outs() << i << "\n";
+      outs() << "    cputype " << cputype << "\n";
+      outs() << "    cpusubtype " << (cpusubtype & ~MachO::CPU_SUBTYPE_MASK)
+             << "\n";
+    }
+    if (verbose &&
+        (cpusubtype & MachO::CPU_SUBTYPE_MASK) == MachO::CPU_SUBTYPE_LIB64)
+      outs() << "    capabilities CPU_SUBTYPE_LIB64\n";
+    else
+      outs() << "    capabilities "
+             << format("0x%" PRIx32,
+                       (cpusubtype & MachO::CPU_SUBTYPE_MASK) >> 24) << "\n";
+    outs() << "    offset " << OFA.getOffset();
+    if (OFA.getOffset() > size)
+      outs() << " (past end of file)";
+    if (OFA.getOffset() % (1 << OFA.getAlign()) != 0)
+      outs() << " (not aligned on it's alignment (2^" << OFA.getAlign() << ")";
+    outs() << "\n";
+    outs() << "    size " << OFA.getSize();
+    big_size = OFA.getOffset() + OFA.getSize();
+    if (big_size > size)
+      outs() << " (past end of file)";
+    outs() << "\n";
+    outs() << "    align 2^" << OFA.getAlign() << " (" << (1 << OFA.getAlign())
+           << ")\n";
+  }
+}
+
+// ParseInputMachO() parses the named Mach-O file in Filename and handles the
+// -arch flags selecting just those slices as specified by them and also parses
+// archive files.  Then for each individual Mach-O file ProcessMachO() is
+// called to process the file based on the command line options.
+void llvm::ParseInputMachO(StringRef Filename) {
+  // Check for -arch all and verifiy the -arch flags are valid.
+  for (unsigned i = 0; i < ArchFlags.size(); ++i) {
+    if (ArchFlags[i] == "all") {
+      ArchAll = true;
+    } else {
+      if (!MachOObjectFile::isValidArch(ArchFlags[i])) {
+        errs() << "llvm-objdump: Unknown architecture named '" + ArchFlags[i] +
+                      "'for the -arch option\n";
+        return;
+      }
+    }
+  }
+
+  // Attempt to open the binary.
+  ErrorOr<OwningBinary<Binary>> BinaryOrErr = createBinary(Filename);
+  if (std::error_code EC = BinaryOrErr.getError()) {
+    errs() << "llvm-objdump: '" << Filename << "': " << EC.message() << ".\n";
+    return;
+  }
+  Binary &Bin = *BinaryOrErr.get().getBinary();
+
+  if (Archive *A = dyn_cast<Archive>(&Bin)) {
+    outs() << "Archive : " << Filename << "\n";
+    for (Archive::child_iterator I = A->child_begin(), E = A->child_end();
+         I != E; ++I) {
+      ErrorOr<std::unique_ptr<Binary>> ChildOrErr = I->getAsBinary();
+      if (ChildOrErr.getError())
+        continue;
+      if (MachOObjectFile *O = dyn_cast<MachOObjectFile>(&*ChildOrErr.get())) {
+        if (!checkMachOAndArchFlags(O, Filename))
+          return;
+        ProcessMachO(Filename, O, O->getFileName());
+      }
+    }
     return;
   }
+  if (UniversalHeaders) {
+    if (MachOUniversalBinary *UB = dyn_cast<MachOUniversalBinary>(&Bin))
+      printMachOUniversalHeaders(UB, true);
+  }
+  if (MachOUniversalBinary *UB = dyn_cast<MachOUniversalBinary>(&Bin)) {
+    // If we have a list of architecture flags specified dump only those.
+    if (!ArchAll && ArchFlags.size() != 0) {
+      // Look for a slice in the universal binary that matches each ArchFlag.
+      bool ArchFound;
+      for (unsigned i = 0; i < ArchFlags.size(); ++i) {
+        ArchFound = false;
+        for (MachOUniversalBinary::object_iterator I = UB->begin_objects(),
+                                                   E = UB->end_objects();
+             I != E; ++I) {
+          if (ArchFlags[i] == I->getArchTypeName()) {
+            ArchFound = true;
+            ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr =
+                I->getAsObjectFile();
+            std::string ArchitectureName = "";
+            if (ArchFlags.size() > 1)
+              ArchitectureName = I->getArchTypeName();
+            if (ObjOrErr) {
+              ObjectFile &O = *ObjOrErr.get();
+              if (MachOObjectFile *MachOOF = dyn_cast<MachOObjectFile>(&O))
+                ProcessMachO(Filename, MachOOF, "", ArchitectureName);
+            } else if (ErrorOr<std::unique_ptr<Archive>> AOrErr =
+                           I->getAsArchive()) {
+              std::unique_ptr<Archive> &A = *AOrErr;
+              outs() << "Archive : " << Filename;
+              if (!ArchitectureName.empty())
+                outs() << " (architecture " << ArchitectureName << ")";
+              outs() << "\n";
+              for (Archive::child_iterator AI = A->child_begin(),
+                                           AE = A->child_end();
+                   AI != AE; ++AI) {
+                ErrorOr<std::unique_ptr<Binary>> ChildOrErr = AI->getAsBinary();
+                if (ChildOrErr.getError())
+                  continue;
+                if (MachOObjectFile *O =
+                        dyn_cast<MachOObjectFile>(&*ChildOrErr.get()))
+                  ProcessMachO(Filename, O, O->getFileName(), ArchitectureName);
+              }
+            }
+          }
+        }
+        if (!ArchFound) {
+          errs() << "llvm-objdump: file: " + Filename + " does not contain "
+                 << "architecture: " + ArchFlags[i] + "\n";
+          return;
+        }
+      }
+      return;
+    }
+    // No architecture flags were specified so if this contains a slice that
+    // matches the host architecture dump only that.
+    if (!ArchAll) {
+      for (MachOUniversalBinary::object_iterator I = UB->begin_objects(),
+                                                 E = UB->end_objects();
+           I != E; ++I) {
+        if (MachOObjectFile::getHostArch().getArchName() ==
+            I->getArchTypeName()) {
+          ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr = I->getAsObjectFile();
+          std::string ArchiveName;
+          ArchiveName.clear();
+          if (ObjOrErr) {
+            ObjectFile &O = *ObjOrErr.get();
+            if (MachOObjectFile *MachOOF = dyn_cast<MachOObjectFile>(&O))
+              ProcessMachO(Filename, MachOOF);
+          } else if (ErrorOr<std::unique_ptr<Archive>> AOrErr =
+                         I->getAsArchive()) {
+            std::unique_ptr<Archive> &A = *AOrErr;
+            outs() << "Archive : " << Filename << "\n";
+            for (Archive::child_iterator AI = A->child_begin(),
+                                         AE = A->child_end();
+                 AI != AE; ++AI) {
+              ErrorOr<std::unique_ptr<Binary>> ChildOrErr = AI->getAsBinary();
+              if (ChildOrErr.getError())
+                continue;
+              if (MachOObjectFile *O =
+                      dyn_cast<MachOObjectFile>(&*ChildOrErr.get()))
+                ProcessMachO(Filename, O, O->getFileName());
+            }
+          }
+          return;
+        }
+      }
+    }
+    // Either all architectures have been specified or none have been specified
+    // and this does not contain the host architecture so dump all the slices.
+    bool moreThanOneArch = UB->getNumberOfObjects() > 1;
+    for (MachOUniversalBinary::object_iterator I = UB->begin_objects(),
+                                               E = UB->end_objects();
+         I != E; ++I) {
+      ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr = I->getAsObjectFile();
+      std::string ArchitectureName = "";
+      if (moreThanOneArch)
+        ArchitectureName = I->getArchTypeName();
+      if (ObjOrErr) {
+        ObjectFile &Obj = *ObjOrErr.get();
+        if (MachOObjectFile *MachOOF = dyn_cast<MachOObjectFile>(&Obj))
+          ProcessMachO(Filename, MachOOF, "", ArchitectureName);
+      } else if (ErrorOr<std::unique_ptr<Archive>> AOrErr = I->getAsArchive()) {
+        std::unique_ptr<Archive> &A = *AOrErr;
+        outs() << "Archive : " << Filename;
+        if (!ArchitectureName.empty())
+          outs() << " (architecture " << ArchitectureName << ")";
+        outs() << "\n";
+        for (Archive::child_iterator AI = A->child_begin(), AE = A->child_end();
+             AI != AE; ++AI) {
+          ErrorOr<std::unique_ptr<Binary>> ChildOrErr = AI->getAsBinary();
+          if (ChildOrErr.getError())
+            continue;
+          if (MachOObjectFile *O =
+                  dyn_cast<MachOObjectFile>(&*ChildOrErr.get())) {
+            if (MachOObjectFile *MachOOF = dyn_cast<MachOObjectFile>(O))
+              ProcessMachO(Filename, MachOOF, MachOOF->getFileName(),
+                           ArchitectureName);
+          }
+        }
+      }
+    }
+    return;
+  }
+  if (ObjectFile *O = dyn_cast<ObjectFile>(&Bin)) {
+    if (!checkMachOAndArchFlags(O, Filename))
+      return;
+    if (MachOObjectFile *MachOOF = dyn_cast<MachOObjectFile>(&*O)) {
+      ProcessMachO(Filename, MachOOF);
+    } else
+      errs() << "llvm-objdump: '" << Filename << "': "
+             << "Object is not a Mach-O file type.\n";
+  } else
+    errs() << "llvm-objdump: '" << Filename << "': "
+           << "Unrecognized file type.\n";
+}
+
+typedef DenseMap<uint64_t, StringRef> SymbolAddressMap;
+typedef std::pair<uint64_t, const char *> BindInfoEntry;
+typedef std::vector<BindInfoEntry> BindTable;
+typedef BindTable::iterator bind_table_iterator;
+
+// The block of info used by the Symbolizer call backs.
+struct DisassembleInfo {
+  bool verbose;
+  MachOObjectFile *O;
+  SectionRef S;
+  SymbolAddressMap *AddrMap;
+  std::vector<SectionRef> *Sections;
+  const char *class_name;
+  const char *selector_name;
+  char *method;
+  char *demangled_name;
+  uint64_t adrp_addr;
+  uint32_t adrp_inst;
+  BindTable *bindtable;
+};
+
+// GuessSymbolName is passed the address of what might be a symbol and a
+// pointer to the DisassembleInfo struct.  It returns the name of a symbol
+// with that address or nullptr if no symbol is found with that address.
+static const char *GuessSymbolName(uint64_t value,
+                                   struct DisassembleInfo *info) {
+  const char *SymbolName = nullptr;
+  // A DenseMap can't lookup up some values.
+  if (value != 0xffffffffffffffffULL && value != 0xfffffffffffffffeULL) {
+    StringRef name = info->AddrMap->lookup(value);
+    if (!name.empty())
+      SymbolName = name.data();
+  }
+  return SymbolName;
+}
+
+// SymbolizerGetOpInfo() is the operand information call back function.
+// This is called to get the symbolic information for operand(s) of an
+// instruction when it is being done.  This routine does this from
+// the relocation information, symbol table, etc. That block of information
+// is a pointer to the struct DisassembleInfo that was passed when the
+// disassembler context was created and passed to back to here when
+// called back by the disassembler for instruction operands that could have
+// relocation information. The address of the instruction containing operand is
+// at the Pc parameter.  The immediate value the operand has is passed in
+// op_info->Value and is at Offset past the start of the instruction and has a
+// byte Size of 1, 2 or 4. The symbolc information is returned in TagBuf is the
+// LLVMOpInfo1 struct defined in the header "llvm-c/Disassembler.h" as symbol
+// names and addends of the symbolic expression to add for the operand.  The
+// value of TagType is currently 1 (for the LLVMOpInfo1 struct). If symbolic
+// information is returned then this function returns 1 else it returns 0.
+int SymbolizerGetOpInfo(void *DisInfo, uint64_t Pc, uint64_t Offset,
+                        uint64_t Size, int TagType, void *TagBuf) {
+  struct DisassembleInfo *info = (struct DisassembleInfo *)DisInfo;
+  struct LLVMOpInfo1 *op_info = (struct LLVMOpInfo1 *)TagBuf;
+  uint64_t value = op_info->Value;
+
+  // Make sure all fields returned are zero if we don't set them.
+  memset((void *)op_info, '\0', sizeof(struct LLVMOpInfo1));
+  op_info->Value = value;
+
+  // If the TagType is not the value 1 which it code knows about or if no
+  // verbose symbolic information is wanted then just return 0, indicating no
+  // information is being returned.
+  if (TagType != 1 || info->verbose == false)
+    return 0;
+
+  unsigned int Arch = info->O->getArch();
+  if (Arch == Triple::x86) {
+    if (Size != 1 && Size != 2 && Size != 4 && Size != 0)
+      return 0;
+    // First search the section's relocation entries (if any) for an entry
+    // for this section offset.
+    uint32_t sect_addr = info->S.getAddress();
+    uint32_t sect_offset = (Pc + Offset) - sect_addr;
+    bool reloc_found = false;
+    DataRefImpl Rel;
+    MachO::any_relocation_info RE;
+    bool isExtern = false;
+    SymbolRef Symbol;
+    bool r_scattered = false;
+    uint32_t r_value, pair_r_value, r_type;
+    for (const RelocationRef &Reloc : info->S.relocations()) {
+      uint64_t RelocOffset;
+      Reloc.getOffset(RelocOffset);
+      if (RelocOffset == sect_offset) {
+        Rel = Reloc.getRawDataRefImpl();
+        RE = info->O->getRelocation(Rel);
+        r_type = info->O->getAnyRelocationType(RE);
+        r_scattered = info->O->isRelocationScattered(RE);
+        if (r_scattered) {
+          r_value = info->O->getScatteredRelocationValue(RE);
+          if (r_type == MachO::GENERIC_RELOC_SECTDIFF ||
+              r_type == MachO::GENERIC_RELOC_LOCAL_SECTDIFF) {
+            DataRefImpl RelNext = Rel;
+            info->O->moveRelocationNext(RelNext);
+            MachO::any_relocation_info RENext;
+            RENext = info->O->getRelocation(RelNext);
+            if (info->O->isRelocationScattered(RENext))
+              pair_r_value = info->O->getScatteredRelocationValue(RENext);
+            else
+              return 0;
+          }
+        } else {
+          isExtern = info->O->getPlainRelocationExternal(RE);
+          if (isExtern) {
+            symbol_iterator RelocSym = Reloc.getSymbol();
+            Symbol = *RelocSym;
+          }
+        }
+        reloc_found = true;
+        break;
+      }
+    }
+    if (reloc_found && isExtern) {
+      StringRef SymName;
+      Symbol.getName(SymName);
+      const char *name = SymName.data();
+      op_info->AddSymbol.Present = 1;
+      op_info->AddSymbol.Name = name;
+      // For i386 extern relocation entries the value in the instruction is
+      // the offset from the symbol, and value is already set in op_info->Value.
+      return 1;
+    }
+    if (reloc_found && (r_type == MachO::GENERIC_RELOC_SECTDIFF ||
+                        r_type == MachO::GENERIC_RELOC_LOCAL_SECTDIFF)) {
+      const char *add = GuessSymbolName(r_value, info);
+      const char *sub = GuessSymbolName(pair_r_value, info);
+      uint32_t offset = value - (r_value - pair_r_value);
+      op_info->AddSymbol.Present = 1;
+      if (add != nullptr)
+        op_info->AddSymbol.Name = add;
+      else
+        op_info->AddSymbol.Value = r_value;
+      op_info->SubtractSymbol.Present = 1;
+      if (sub != nullptr)
+        op_info->SubtractSymbol.Name = sub;
+      else
+        op_info->SubtractSymbol.Value = pair_r_value;
+      op_info->Value = offset;
+      return 1;
+    }
+    // TODO:
+    // Second search the external relocation entries of a fully linked image
+    // (if any) for an entry that matches this segment offset.
+    // uint32_t seg_offset = (Pc + Offset);
+    return 0;
+  } else if (Arch == Triple::x86_64) {
+    if (Size != 1 && Size != 2 && Size != 4 && Size != 0)
+      return 0;
+    // First search the section's relocation entries (if any) for an entry
+    // for this section offset.
+    uint64_t sect_addr = info->S.getAddress();
+    uint64_t sect_offset = (Pc + Offset) - sect_addr;
+    bool reloc_found = false;
+    DataRefImpl Rel;
+    MachO::any_relocation_info RE;
+    bool isExtern = false;
+    SymbolRef Symbol;
+    for (const RelocationRef &Reloc : info->S.relocations()) {
+      uint64_t RelocOffset;
+      Reloc.getOffset(RelocOffset);
+      if (RelocOffset == sect_offset) {
+        Rel = Reloc.getRawDataRefImpl();
+        RE = info->O->getRelocation(Rel);
+        // NOTE: Scattered relocations don't exist on x86_64.
+        isExtern = info->O->getPlainRelocationExternal(RE);
+        if (isExtern) {
+          symbol_iterator RelocSym = Reloc.getSymbol();
+          Symbol = *RelocSym;
+        }
+        reloc_found = true;
+        break;
+      }
+    }
+    if (reloc_found && isExtern) {
+      // The Value passed in will be adjusted by the Pc if the instruction
+      // adds the Pc.  But for x86_64 external relocation entries the Value
+      // is the offset from the external symbol.
+      if (info->O->getAnyRelocationPCRel(RE))
+        op_info->Value -= Pc + Offset + Size;
+      StringRef SymName;
+      Symbol.getName(SymName);
+      const char *name = SymName.data();
+      unsigned Type = info->O->getAnyRelocationType(RE);
+      if (Type == MachO::X86_64_RELOC_SUBTRACTOR) {
+        DataRefImpl RelNext = Rel;
+        info->O->moveRelocationNext(RelNext);
+        MachO::any_relocation_info RENext = info->O->getRelocation(RelNext);
+        unsigned TypeNext = info->O->getAnyRelocationType(RENext);
+        bool isExternNext = info->O->getPlainRelocationExternal(RENext);
+        unsigned SymbolNum = info->O->getPlainRelocationSymbolNum(RENext);
+        if (TypeNext == MachO::X86_64_RELOC_UNSIGNED && isExternNext) {
+          op_info->SubtractSymbol.Present = 1;
+          op_info->SubtractSymbol.Name = name;
+          symbol_iterator RelocSymNext = info->O->getSymbolByIndex(SymbolNum);
+          Symbol = *RelocSymNext;
+          StringRef SymNameNext;
+          Symbol.getName(SymNameNext);
+          name = SymNameNext.data();
+        }
+      }
+      // TODO: add the VariantKinds to op_info->VariantKind for relocation types
+      // like: X86_64_RELOC_TLV, X86_64_RELOC_GOT_LOAD and X86_64_RELOC_GOT.
+      op_info->AddSymbol.Present = 1;
+      op_info->AddSymbol.Name = name;
+      return 1;
+    }
+    // TODO:
+    // Second search the external relocation entries of a fully linked image
+    // (if any) for an entry that matches this segment offset.
+    // uint64_t seg_offset = (Pc + Offset);
+    return 0;
+  } else if (Arch == Triple::arm) {
+    if (Offset != 0 || (Size != 4 && Size != 2))
+      return 0;
+    // First search the section's relocation entries (if any) for an entry
+    // for this section offset.
+    uint32_t sect_addr = info->S.getAddress();
+    uint32_t sect_offset = (Pc + Offset) - sect_addr;
+    bool reloc_found = false;
+    DataRefImpl Rel;
+    MachO::any_relocation_info RE;
+    bool isExtern = false;
+    SymbolRef Symbol;
+    bool r_scattered = false;
+    uint32_t r_value, pair_r_value, r_type, r_length, other_half;
+    for (const RelocationRef &Reloc : info->S.relocations()) {
+      uint64_t RelocOffset;
+      Reloc.getOffset(RelocOffset);
+      if (RelocOffset == sect_offset) {
+        Rel = Reloc.getRawDataRefImpl();
+        RE = info->O->getRelocation(Rel);
+        r_length = info->O->getAnyRelocationLength(RE);
+        r_scattered = info->O->isRelocationScattered(RE);
+        if (r_scattered) {
+          r_value = info->O->getScatteredRelocationValue(RE);
+          r_type = info->O->getScatteredRelocationType(RE);
+        } else {
+          r_type = info->O->getAnyRelocationType(RE);
+          isExtern = info->O->getPlainRelocationExternal(RE);
+          if (isExtern) {
+            symbol_iterator RelocSym = Reloc.getSymbol();
+            Symbol = *RelocSym;
+          }
+        }
+        if (r_type == MachO::ARM_RELOC_HALF ||
+            r_type == MachO::ARM_RELOC_SECTDIFF ||
+            r_type == MachO::ARM_RELOC_LOCAL_SECTDIFF ||
+            r_type == MachO::ARM_RELOC_HALF_SECTDIFF) {
+          DataRefImpl RelNext = Rel;
+          info->O->moveRelocationNext(RelNext);
+          MachO::any_relocation_info RENext;
+          RENext = info->O->getRelocation(RelNext);
+          other_half = info->O->getAnyRelocationAddress(RENext) & 0xffff;
+          if (info->O->isRelocationScattered(RENext))
+            pair_r_value = info->O->getScatteredRelocationValue(RENext);
+        }
+        reloc_found = true;
+        break;
+      }
+    }
+    if (reloc_found && isExtern) {
+      StringRef SymName;
+      Symbol.getName(SymName);
+      const char *name = SymName.data();
+      op_info->AddSymbol.Present = 1;
+      op_info->AddSymbol.Name = name;
+      if (value != 0) {
+        switch (r_type) {
+        case MachO::ARM_RELOC_HALF:
+          if ((r_length & 0x1) == 1) {
+            op_info->Value = value << 16 | other_half;
+            op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_HI16;
+          } else {
+            op_info->Value = other_half << 16 | value;
+            op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_LO16;
+          }
+          break;
+        default:
+          break;
+        }
+      } else {
+        switch (r_type) {
+        case MachO::ARM_RELOC_HALF:
+          if ((r_length & 0x1) == 1) {
+            op_info->Value = value << 16 | other_half;
+            op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_HI16;
+          } else {
+            op_info->Value = other_half << 16 | value;
+            op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_LO16;
+          }
+          break;
+        default:
+          break;
+        }
+      }
+      return 1;
+    }
+    // If we have a branch that is not an external relocation entry then
+    // return 0 so the code in tryAddingSymbolicOperand() can use the
+    // SymbolLookUp call back with the branch target address to look up the
+    // symbol and possiblity add an annotation for a symbol stub.
+    if (reloc_found && isExtern == 0 && (r_type == MachO::ARM_RELOC_BR24 ||
+                                         r_type == MachO::ARM_THUMB_RELOC_BR22))
+      return 0;
+
+    uint32_t offset = 0;
+    if (reloc_found) {
+      if (r_type == MachO::ARM_RELOC_HALF ||
+          r_type == MachO::ARM_RELOC_HALF_SECTDIFF) {
+        if ((r_length & 0x1) == 1)
+          value = value << 16 | other_half;
+        else
+          value = other_half << 16 | value;
+      }
+      if (r_scattered && (r_type != MachO::ARM_RELOC_HALF &&
+                          r_type != MachO::ARM_RELOC_HALF_SECTDIFF)) {
+        offset = value - r_value;
+        value = r_value;
+      }
+    }
+
+    if (reloc_found && r_type == MachO::ARM_RELOC_HALF_SECTDIFF) {
+      if ((r_length & 0x1) == 1)
+        op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_HI16;
+      else
+        op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_LO16;
+      const char *add = GuessSymbolName(r_value, info);
+      const char *sub = GuessSymbolName(pair_r_value, info);
+      int32_t offset = value - (r_value - pair_r_value);
+      op_info->AddSymbol.Present = 1;
+      if (add != nullptr)
+        op_info->AddSymbol.Name = add;
+      else
+        op_info->AddSymbol.Value = r_value;
+      op_info->SubtractSymbol.Present = 1;
+      if (sub != nullptr)
+        op_info->SubtractSymbol.Name = sub;
+      else
+        op_info->SubtractSymbol.Value = pair_r_value;
+      op_info->Value = offset;
+      return 1;
+    }
+
+    if (reloc_found == false)
+      return 0;
+
+    op_info->AddSymbol.Present = 1;
+    op_info->Value = offset;
+    if (reloc_found) {
+      if (r_type == MachO::ARM_RELOC_HALF) {
+        if ((r_length & 0x1) == 1)
+          op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_HI16;
+        else
+          op_info->VariantKind = LLVMDisassembler_VariantKind_ARM_LO16;
+      }
+    }
+    const char *add = GuessSymbolName(value, info);
+    if (add != nullptr) {
+      op_info->AddSymbol.Name = add;
+      return 1;
+    }
+    op_info->AddSymbol.Value = value;
+    return 1;
+  } else if (Arch == Triple::aarch64) {
+    if (Offset != 0 || Size != 4)
+      return 0;
+    // First search the section's relocation entries (if any) for an entry
+    // for this section offset.
+    uint64_t sect_addr = info->S.getAddress();
+    uint64_t sect_offset = (Pc + Offset) - sect_addr;
+    bool reloc_found = false;
+    DataRefImpl Rel;
+    MachO::any_relocation_info RE;
+    bool isExtern = false;
+    SymbolRef Symbol;
+    uint32_t r_type = 0;
+    for (const RelocationRef &Reloc : info->S.relocations()) {
+      uint64_t RelocOffset;
+      Reloc.getOffset(RelocOffset);
+      if (RelocOffset == sect_offset) {
+        Rel = Reloc.getRawDataRefImpl();
+        RE = info->O->getRelocation(Rel);
+        r_type = info->O->getAnyRelocationType(RE);
+        if (r_type == MachO::ARM64_RELOC_ADDEND) {
+          DataRefImpl RelNext = Rel;
+          info->O->moveRelocationNext(RelNext);
+          MachO::any_relocation_info RENext = info->O->getRelocation(RelNext);
+          if (value == 0) {
+            value = info->O->getPlainRelocationSymbolNum(RENext);
+            op_info->Value = value;
+          }
+        }
+        // NOTE: Scattered relocations don't exist on arm64.
+        isExtern = info->O->getPlainRelocationExternal(RE);
+        if (isExtern) {
+          symbol_iterator RelocSym = Reloc.getSymbol();
+          Symbol = *RelocSym;
+        }
+        reloc_found = true;
+        break;
+      }
+    }
+    if (reloc_found && isExtern) {
+      StringRef SymName;
+      Symbol.getName(SymName);
+      const char *name = SymName.data();
+      op_info->AddSymbol.Present = 1;
+      op_info->AddSymbol.Name = name;
+
+      switch (r_type) {
+      case MachO::ARM64_RELOC_PAGE21:
+        /* @page */
+        op_info->VariantKind = LLVMDisassembler_VariantKind_ARM64_PAGE;
+        break;
+      case MachO::ARM64_RELOC_PAGEOFF12:
+        /* @pageoff */
+        op_info->VariantKind = LLVMDisassembler_VariantKind_ARM64_PAGEOFF;
+        break;
+      case MachO::ARM64_RELOC_GOT_LOAD_PAGE21:
+        /* @gotpage */
+        op_info->VariantKind = LLVMDisassembler_VariantKind_ARM64_GOTPAGE;
+        break;
+      case MachO::ARM64_RELOC_GOT_LOAD_PAGEOFF12:
+        /* @gotpageoff */
+        op_info->VariantKind = LLVMDisassembler_VariantKind_ARM64_GOTPAGEOFF;
+        break;
+      case MachO::ARM64_RELOC_TLVP_LOAD_PAGE21:
+        /* @tvlppage is not implemented in llvm-mc */
+        op_info->VariantKind = LLVMDisassembler_VariantKind_ARM64_TLVP;
+        break;
+      case MachO::ARM64_RELOC_TLVP_LOAD_PAGEOFF12:
+        /* @tvlppageoff is not implemented in llvm-mc */
+        op_info->VariantKind = LLVMDisassembler_VariantKind_ARM64_TLVOFF;
+        break;
+      default:
+      case MachO::ARM64_RELOC_BRANCH26:
+        op_info->VariantKind = LLVMDisassembler_VariantKind_None;
+        break;
+      }
+      return 1;
+    }
+    return 0;
+  } else {
+    return 0;
+  }
+}
+
+// GuessCstringPointer is passed the address of what might be a pointer to a
+// literal string in a cstring section.  If that address is in a cstring section
+// it returns a pointer to that string.  Else it returns nullptr.
+const char *GuessCstringPointer(uint64_t ReferenceValue,
+                                struct DisassembleInfo *info) {
+  uint32_t LoadCommandCount = info->O->getHeader().ncmds;
+  MachOObjectFile::LoadCommandInfo Load = info->O->getFirstLoadCommandInfo();
+  for (unsigned I = 0;; ++I) {
+    if (Load.C.cmd == MachO::LC_SEGMENT_64) {
+      MachO::segment_command_64 Seg = info->O->getSegment64LoadCommand(Load);
+      for (unsigned J = 0; J < Seg.nsects; ++J) {
+        MachO::section_64 Sec = info->O->getSection64(Load, J);
+        uint32_t section_type = Sec.flags & MachO::SECTION_TYPE;
+        if (section_type == MachO::S_CSTRING_LITERALS &&
+            ReferenceValue >= Sec.addr &&
+            ReferenceValue < Sec.addr + Sec.size) {
+          uint64_t sect_offset = ReferenceValue - Sec.addr;
+          uint64_t object_offset = Sec.offset + sect_offset;
+          StringRef MachOContents = info->O->getData();
+          uint64_t object_size = MachOContents.size();
+          const char *object_addr = (const char *)MachOContents.data();
+          if (object_offset < object_size) {
+            const char *name = object_addr + object_offset;
+            return name;
+          } else {
+            return nullptr;
+          }
+        }
+      }
+    } else if (Load.C.cmd == MachO::LC_SEGMENT) {
+      MachO::segment_command Seg = info->O->getSegmentLoadCommand(Load);
+      for (unsigned J = 0; J < Seg.nsects; ++J) {
+        MachO::section Sec = info->O->getSection(Load, J);
+        uint32_t section_type = Sec.flags & MachO::SECTION_TYPE;
+        if (section_type == MachO::S_CSTRING_LITERALS &&
+            ReferenceValue >= Sec.addr &&
+            ReferenceValue < Sec.addr + Sec.size) {
+          uint64_t sect_offset = ReferenceValue - Sec.addr;
+          uint64_t object_offset = Sec.offset + sect_offset;
+          StringRef MachOContents = info->O->getData();
+          uint64_t object_size = MachOContents.size();
+          const char *object_addr = (const char *)MachOContents.data();
+          if (object_offset < object_size) {
+            const char *name = object_addr + object_offset;
+            return name;
+          } else {
+            return nullptr;
+          }
+        }
+      }
+    }
+    if (I == LoadCommandCount - 1)
+      break;
+    else
+      Load = info->O->getNextLoadCommandInfo(Load);
+  }
+  return nullptr;
+}
+
+// GuessIndirectSymbol returns the name of the indirect symbol for the
+// ReferenceValue passed in or nullptr.  This is used when ReferenceValue maybe
+// an address of a symbol stub or a lazy or non-lazy pointer to associate the
+// symbol name being referenced by the stub or pointer.
+static const char *GuessIndirectSymbol(uint64_t ReferenceValue,
+                                       struct DisassembleInfo *info) {
+  uint32_t LoadCommandCount = info->O->getHeader().ncmds;
+  MachOObjectFile::LoadCommandInfo Load = info->O->getFirstLoadCommandInfo();
+  MachO::dysymtab_command Dysymtab = info->O->getDysymtabLoadCommand();
+  MachO::symtab_command Symtab = info->O->getSymtabLoadCommand();
+  for (unsigned I = 0;; ++I) {
+    if (Load.C.cmd == MachO::LC_SEGMENT_64) {
+      MachO::segment_command_64 Seg = info->O->getSegment64LoadCommand(Load);
+      for (unsigned J = 0; J < Seg.nsects; ++J) {
+        MachO::section_64 Sec = info->O->getSection64(Load, J);
+        uint32_t section_type = Sec.flags & MachO::SECTION_TYPE;
+        if ((section_type == MachO::S_NON_LAZY_SYMBOL_POINTERS ||
+             section_type == MachO::S_LAZY_SYMBOL_POINTERS ||
+             section_type == MachO::S_LAZY_DYLIB_SYMBOL_POINTERS ||
+             section_type == MachO::S_THREAD_LOCAL_VARIABLE_POINTERS ||
+             section_type == MachO::S_SYMBOL_STUBS) &&
+            ReferenceValue >= Sec.addr &&
+            ReferenceValue < Sec.addr + Sec.size) {
+          uint32_t stride;
+          if (section_type == MachO::S_SYMBOL_STUBS)
+            stride = Sec.reserved2;
+          else
+            stride = 8;
+          if (stride == 0)
+            return nullptr;
+          uint32_t index = Sec.reserved1 + (ReferenceValue - Sec.addr) / stride;
+          if (index < Dysymtab.nindirectsyms) {
+            uint32_t indirect_symbol =
+                info->O->getIndirectSymbolTableEntry(Dysymtab, index);
+            if (indirect_symbol < Symtab.nsyms) {
+              symbol_iterator Sym = info->O->getSymbolByIndex(indirect_symbol);
+              SymbolRef Symbol = *Sym;
+              StringRef SymName;
+              Symbol.getName(SymName);
+              const char *name = SymName.data();
+              return name;
+            }
+          }
+        }
+      }
+    } else if (Load.C.cmd == MachO::LC_SEGMENT) {
+      MachO::segment_command Seg = info->O->getSegmentLoadCommand(Load);
+      for (unsigned J = 0; J < Seg.nsects; ++J) {
+        MachO::section Sec = info->O->getSection(Load, J);
+        uint32_t section_type = Sec.flags & MachO::SECTION_TYPE;
+        if ((section_type == MachO::S_NON_LAZY_SYMBOL_POINTERS ||
+             section_type == MachO::S_LAZY_SYMBOL_POINTERS ||
+             section_type == MachO::S_LAZY_DYLIB_SYMBOL_POINTERS ||
+             section_type == MachO::S_THREAD_LOCAL_VARIABLE_POINTERS ||
+             section_type == MachO::S_SYMBOL_STUBS) &&
+            ReferenceValue >= Sec.addr &&
+            ReferenceValue < Sec.addr + Sec.size) {
+          uint32_t stride;
+          if (section_type == MachO::S_SYMBOL_STUBS)
+            stride = Sec.reserved2;
+          else
+            stride = 4;
+          if (stride == 0)
+            return nullptr;
+          uint32_t index = Sec.reserved1 + (ReferenceValue - Sec.addr) / stride;
+          if (index < Dysymtab.nindirectsyms) {
+            uint32_t indirect_symbol =
+                info->O->getIndirectSymbolTableEntry(Dysymtab, index);
+            if (indirect_symbol < Symtab.nsyms) {
+              symbol_iterator Sym = info->O->getSymbolByIndex(indirect_symbol);
+              SymbolRef Symbol = *Sym;
+              StringRef SymName;
+              Symbol.getName(SymName);
+              const char *name = SymName.data();
+              return name;
+            }
+          }
+        }
+      }
+    }
+    if (I == LoadCommandCount - 1)
+      break;
+    else
+      Load = info->O->getNextLoadCommandInfo(Load);
+  }
+  return nullptr;
+}
+
+// method_reference() is called passing it the ReferenceName that might be
+// a reference it to an Objective-C method call.  If so then it allocates and
+// assembles a method call string with the values last seen and saved in
+// the DisassembleInfo's class_name and selector_name fields.  This is saved
+// into the method field of the info and any previous string is free'ed.
+// Then the class_name field in the info is set to nullptr.  The method call
+// string is set into ReferenceName and ReferenceType is set to
+// LLVMDisassembler_ReferenceType_Out_Objc_Message.  If this not a method call
+// then both ReferenceType and ReferenceName are left unchanged.
+static void method_reference(struct DisassembleInfo *info,
+                             uint64_t *ReferenceType,
+                             const char **ReferenceName) {
+  unsigned int Arch = info->O->getArch();
+  if (*ReferenceName != nullptr) {
+    if (strcmp(*ReferenceName, "_objc_msgSend") == 0) {
+      if (info->selector_name != nullptr) {
+        if (info->method != nullptr)
+          free(info->method);
+        if (info->class_name != nullptr) {
+          info->method = (char *)malloc(5 + strlen(info->class_name) +
+                                        strlen(info->selector_name));
+          if (info->method != nullptr) {
+            strcpy(info->method, "+[");
+            strcat(info->method, info->class_name);
+            strcat(info->method, " ");
+            strcat(info->method, info->selector_name);
+            strcat(info->method, "]");
+            *ReferenceName = info->method;
+            *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Message;
+          }
+        } else {
+          info->method = (char *)malloc(9 + strlen(info->selector_name));
+          if (info->method != nullptr) {
+            if (Arch == Triple::x86_64)
+              strcpy(info->method, "-[%rdi ");
+            else if (Arch == Triple::aarch64)
+              strcpy(info->method, "-[x0 ");
+            else
+              strcpy(info->method, "-[r? ");
+            strcat(info->method, info->selector_name);
+            strcat(info->method, "]");
+            *ReferenceName = info->method;
+            *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Message;
+          }
+        }
+        info->class_name = nullptr;
+      }
+    } else if (strcmp(*ReferenceName, "_objc_msgSendSuper2") == 0) {
+      if (info->selector_name != nullptr) {
+        if (info->method != nullptr)
+          free(info->method);
+        info->method = (char *)malloc(17 + strlen(info->selector_name));
+        if (info->method != nullptr) {
+          if (Arch == Triple::x86_64)
+            strcpy(info->method, "-[[%rdi super] ");
+          else if (Arch == Triple::aarch64)
+            strcpy(info->method, "-[[x0 super] ");
+          else
+            strcpy(info->method, "-[[r? super] ");
+          strcat(info->method, info->selector_name);
+          strcat(info->method, "]");
+          *ReferenceName = info->method;
+          *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Message;
+        }
+        info->class_name = nullptr;
+      }
+    }
+  }
+}
+
+// GuessPointerPointer() is passed the address of what might be a pointer to
+// a reference to an Objective-C class, selector, message ref or cfstring.
+// If so the value of the pointer is returned and one of the booleans are set
+// to true.  If not zero is returned and all the booleans are set to false.
+static uint64_t GuessPointerPointer(uint64_t ReferenceValue,
+                                    struct DisassembleInfo *info,
+                                    bool &classref, bool &selref, bool &msgref,
+                                    bool &cfstring) {
+  classref = false;
+  selref = false;
+  msgref = false;
+  cfstring = false;
+  uint32_t LoadCommandCount = info->O->getHeader().ncmds;
+  MachOObjectFile::LoadCommandInfo Load = info->O->getFirstLoadCommandInfo();
+  for (unsigned I = 0;; ++I) {
+    if (Load.C.cmd == MachO::LC_SEGMENT_64) {
+      MachO::segment_command_64 Seg = info->O->getSegment64LoadCommand(Load);
+      for (unsigned J = 0; J < Seg.nsects; ++J) {
+        MachO::section_64 Sec = info->O->getSection64(Load, J);
+        if ((strncmp(Sec.sectname, "__objc_selrefs", 16) == 0 ||
+             strncmp(Sec.sectname, "__objc_classrefs", 16) == 0 ||
+             strncmp(Sec.sectname, "__objc_superrefs", 16) == 0 ||
+             strncmp(Sec.sectname, "__objc_msgrefs", 16) == 0 ||
+             strncmp(Sec.sectname, "__cfstring", 16) == 0) &&
+            ReferenceValue >= Sec.addr &&
+            ReferenceValue < Sec.addr + Sec.size) {
+          uint64_t sect_offset = ReferenceValue - Sec.addr;
+          uint64_t object_offset = Sec.offset + sect_offset;
+          StringRef MachOContents = info->O->getData();
+          uint64_t object_size = MachOContents.size();
+          const char *object_addr = (const char *)MachOContents.data();
+          if (object_offset < object_size) {
+            uint64_t pointer_value;
+            memcpy(&pointer_value, object_addr + object_offset,
+                   sizeof(uint64_t));
+            if (info->O->isLittleEndian() != sys::IsLittleEndianHost)
+              sys::swapByteOrder(pointer_value);
+            if (strncmp(Sec.sectname, "__objc_selrefs", 16) == 0)
+              selref = true;
+            else if (strncmp(Sec.sectname, "__objc_classrefs", 16) == 0 ||
+                     strncmp(Sec.sectname, "__objc_superrefs", 16) == 0)
+              classref = true;
+            else if (strncmp(Sec.sectname, "__objc_msgrefs", 16) == 0 &&
+                     ReferenceValue + 8 < Sec.addr + Sec.size) {
+              msgref = true;
+              memcpy(&pointer_value, object_addr + object_offset + 8,
+                     sizeof(uint64_t));
+              if (info->O->isLittleEndian() != sys::IsLittleEndianHost)
+                sys::swapByteOrder(pointer_value);
+            } else if (strncmp(Sec.sectname, "__cfstring", 16) == 0)
+              cfstring = true;
+            return pointer_value;
+          } else {
+            return 0;
+          }
+        }
+      }
+    }
+    // TODO: Look for LC_SEGMENT for 32-bit Mach-O files.
+    if (I == LoadCommandCount - 1)
+      break;
+    else
+      Load = info->O->getNextLoadCommandInfo(Load);
+  }
+  return 0;
+}
+
+// get_pointer_64 returns a pointer to the bytes in the object file at the
+// Address from a section in the Mach-O file.  And indirectly returns the
+// offset into the section, number of bytes left in the section past the offset
+// and which section is was being referenced.  If the Address is not in a
+// section nullptr is returned.
+const char *get_pointer_64(uint64_t Address, uint32_t &offset, uint32_t &left,
+                           SectionRef &S, DisassembleInfo *info) {
+  offset = 0;
+  left = 0;
+  S = SectionRef();
+  for (unsigned SectIdx = 0; SectIdx != info->Sections->size(); SectIdx++) {
+    uint64_t SectAddress = ((*(info->Sections))[SectIdx]).getAddress();
+    uint64_t SectSize = ((*(info->Sections))[SectIdx]).getSize();
+    if (Address >= SectAddress && Address < SectAddress + SectSize) {
+      S = (*(info->Sections))[SectIdx];
+      offset = Address - SectAddress;
+      left = SectSize - offset;
+      StringRef SectContents;
+      ((*(info->Sections))[SectIdx]).getContents(SectContents);
+      return SectContents.data() + offset;
+    }
+  }
+  return nullptr;
+}
+
+// get_symbol_64() returns the name of a symbol (or nullptr) and the address of
+// the symbol indirectly through n_value. Based on the relocation information
+// for the specified section offset in the specified section reference.
+const char *get_symbol_64(uint32_t sect_offset, SectionRef S,
+                          DisassembleInfo *info, uint64_t &n_value) {
+  n_value = 0;
+  if (info->verbose == false)
+    return nullptr;
+
+  // See if there is an external relocation entry at the sect_offset.
+  bool reloc_found = false;
+  DataRefImpl Rel;
+  MachO::any_relocation_info RE;
+  bool isExtern = false;
+  SymbolRef Symbol;
+  for (const RelocationRef &Reloc : S.relocations()) {
+    uint64_t RelocOffset;
+    Reloc.getOffset(RelocOffset);
+    if (RelocOffset == sect_offset) {
+      Rel = Reloc.getRawDataRefImpl();
+      RE = info->O->getRelocation(Rel);
+      if (info->O->isRelocationScattered(RE))
+        continue;
+      isExtern = info->O->getPlainRelocationExternal(RE);
+      if (isExtern) {
+        symbol_iterator RelocSym = Reloc.getSymbol();
+        Symbol = *RelocSym;
+      }
+      reloc_found = true;
+      break;
+    }
+  }
+  // If there is an external relocation entry for a symbol in this section
+  // at this section_offset then use that symbol's value for the n_value
+  // and return its name.
+  const char *SymbolName = nullptr;
+  if (reloc_found && isExtern) {
+    Symbol.getAddress(n_value);
+    StringRef name;
+    Symbol.getName(name);
+    if (!name.empty()) {
+      SymbolName = name.data();
+      return SymbolName;
+    }
+  }
+
+  // TODO: For fully linked images, look through the external relocation
+  // entries off the dynamic symtab command. For these the r_offset is from the
+  // start of the first writeable segment in the Mach-O file.  So the offset
+  // to this section from that segment is passed to this routine by the caller,
+  // as the database_offset. Which is the difference of the section's starting
+  // address and the first writable segment.
+  //
+  // NOTE: need add passing the database_offset to this routine.
+
+  // TODO: We did not find an external relocation entry so look up the
+  // ReferenceValue as an address of a symbol and if found return that symbol's
+  // name.
+  //
+  // NOTE: need add passing the ReferenceValue to this routine.  Then that code
+  // would simply be this:
+  // SymbolName = GuessSymbolName(ReferenceValue, info);
+
+  return SymbolName;
+}
+
+// These are structs in the Objective-C meta data and read to produce the
+// comments for disassembly.  While these are part of the ABI they are no
+// public defintions.  So the are here not in include/llvm/Support/MachO.h .
+
+// The cfstring object in a 64-bit Mach-O file.
+struct cfstring64_t {
+  uint64_t isa;        // class64_t * (64-bit pointer)
+  uint64_t flags;      // flag bits
+  uint64_t characters; // char * (64-bit pointer)
+  uint64_t length;     // number of non-NULL characters in above
+};
+
+// The class object in a 64-bit Mach-O file.
+struct class64_t {
+  uint64_t isa;        // class64_t * (64-bit pointer)
+  uint64_t superclass; // class64_t * (64-bit pointer)
+  uint64_t cache;      // Cache (64-bit pointer)
+  uint64_t vtable;     // IMP * (64-bit pointer)
+  uint64_t data;       // class_ro64_t * (64-bit pointer)
+};
+
+struct class_ro64_t {
+  uint32_t flags;
+  uint32_t instanceStart;
+  uint32_t instanceSize;
+  uint32_t reserved;
+  uint64_t ivarLayout;     // const uint8_t * (64-bit pointer)
+  uint64_t name;           // const char * (64-bit pointer)
+  uint64_t baseMethods;    // const method_list_t * (64-bit pointer)
+  uint64_t baseProtocols;  // const protocol_list_t * (64-bit pointer)
+  uint64_t ivars;          // const ivar_list_t * (64-bit pointer)
+  uint64_t weakIvarLayout; // const uint8_t * (64-bit pointer)
+  uint64_t baseProperties; // const struct objc_property_list (64-bit pointer)
+};
+
+inline void swapStruct(struct cfstring64_t &cfs) {
+  sys::swapByteOrder(cfs.isa);
+  sys::swapByteOrder(cfs.flags);
+  sys::swapByteOrder(cfs.characters);
+  sys::swapByteOrder(cfs.length);
+}
+
+inline void swapStruct(struct class64_t &c) {
+  sys::swapByteOrder(c.isa);
+  sys::swapByteOrder(c.superclass);
+  sys::swapByteOrder(c.cache);
+  sys::swapByteOrder(c.vtable);
+  sys::swapByteOrder(c.data);
+}
+
+inline void swapStruct(struct class_ro64_t &cro) {
+  sys::swapByteOrder(cro.flags);
+  sys::swapByteOrder(cro.instanceStart);
+  sys::swapByteOrder(cro.instanceSize);
+  sys::swapByteOrder(cro.reserved);
+  sys::swapByteOrder(cro.ivarLayout);
+  sys::swapByteOrder(cro.name);
+  sys::swapByteOrder(cro.baseMethods);
+  sys::swapByteOrder(cro.baseProtocols);
+  sys::swapByteOrder(cro.ivars);
+  sys::swapByteOrder(cro.weakIvarLayout);
+  sys::swapByteOrder(cro.baseProperties);
+}
+
+static const char *get_dyld_bind_info_symbolname(uint64_t ReferenceValue,
+                                                 struct DisassembleInfo *info);
+
+// get_objc2_64bit_class_name() is used for disassembly and is passed a pointer
+// to an Objective-C class and returns the class name.  It is also passed the
+// address of the pointer, so when the pointer is zero as it can be in an .o
+// file, that is used to look for an external relocation entry with a symbol
+// name.
+const char *get_objc2_64bit_class_name(uint64_t pointer_value,
+                                       uint64_t ReferenceValue,
+                                       struct DisassembleInfo *info) {
+  const char *r;
+  uint32_t offset, left;
+  SectionRef S;
+
+  // The pointer_value can be 0 in an object file and have a relocation
+  // entry for the class symbol at the ReferenceValue (the address of the
+  // pointer).
+  if (pointer_value == 0) {
+    r = get_pointer_64(ReferenceValue, offset, left, S, info);
+    if (r == nullptr || left < sizeof(uint64_t))
+      return nullptr;
+    uint64_t n_value;
+    const char *symbol_name = get_symbol_64(offset, S, info, n_value);
+    if (symbol_name == nullptr)
+      return nullptr;
+    const char *class_name = strrchr(symbol_name, '$');
+    if (class_name != nullptr && class_name[1] == '_' && class_name[2] != '\0')
+      return class_name + 2;
+    else
+      return nullptr;
+  }
+
+  // The case were the pointer_value is non-zero and points to a class defined
+  // in this Mach-O file.
+  r = get_pointer_64(pointer_value, offset, left, S, info);
+  if (r == nullptr || left < sizeof(struct class64_t))
+    return nullptr;
+  struct class64_t c;
+  memcpy(&c, r, sizeof(struct class64_t));
+  if (info->O->isLittleEndian() != sys::IsLittleEndianHost)
+    swapStruct(c);
+  if (c.data == 0)
+    return nullptr;
+  r = get_pointer_64(c.data, offset, left, S, info);
+  if (r == nullptr || left < sizeof(struct class_ro64_t))
+    return nullptr;
+  struct class_ro64_t cro;
+  memcpy(&cro, r, sizeof(struct class_ro64_t));
+  if (info->O->isLittleEndian() != sys::IsLittleEndianHost)
+    swapStruct(cro);
+  if (cro.name == 0)
+    return nullptr;
+  const char *name = get_pointer_64(cro.name, offset, left, S, info);
+  return name;
+}
+
+// get_objc2_64bit_cfstring_name is used for disassembly and is passed a
+// pointer to a cfstring and returns its name or nullptr.
+const char *get_objc2_64bit_cfstring_name(uint64_t ReferenceValue,
+                                          struct DisassembleInfo *info) {
+  const char *r, *name;
+  uint32_t offset, left;
+  SectionRef S;
+  struct cfstring64_t cfs;
+  uint64_t cfs_characters;
 
-  std::unique_ptr<MachOObjectFile> MachOOF(static_cast<MachOObjectFile *>(
-      ObjectFile::createMachOObjectFile(Buff.get()).get()));
+  r = get_pointer_64(ReferenceValue, offset, left, S, info);
+  if (r == nullptr || left < sizeof(struct cfstring64_t))
+    return nullptr;
+  memcpy(&cfs, r, sizeof(struct cfstring64_t));
+  if (info->O->isLittleEndian() != sys::IsLittleEndianHost)
+    swapStruct(cfs);
+  if (cfs.characters == 0) {
+    uint64_t n_value;
+    const char *symbol_name = get_symbol_64(
+        offset + offsetof(struct cfstring64_t, characters), S, info, n_value);
+    if (symbol_name == nullptr)
+      return nullptr;
+    cfs_characters = n_value;
+  } else
+    cfs_characters = cfs.characters;
+  name = get_pointer_64(cfs_characters, offset, left, S, info);
 
-  DisassembleInputMachO2(Filename, MachOOF.get());
+  return name;
 }
 
-static void DisassembleInputMachO2(StringRef Filename,
-                                   MachOObjectFile *MachOOF) {
-  const Target *TheTarget = GetTarget(MachOOF);
+// get_objc2_64bit_selref() is used for disassembly and is passed a the address
+// of a pointer to an Objective-C selector reference when the pointer value is
+// zero as in a .o file and is likely to have a external relocation entry with
+// who's symbol's n_value is the real pointer to the selector name.  If that is
+// the case the real pointer to the selector name is returned else 0 is
+// returned
+uint64_t get_objc2_64bit_selref(uint64_t ReferenceValue,
+                                struct DisassembleInfo *info) {
+  uint32_t offset, left;
+  SectionRef S;
+
+  const char *r = get_pointer_64(ReferenceValue, offset, left, S, info);
+  if (r == nullptr || left < sizeof(uint64_t))
+    return 0;
+  uint64_t n_value;
+  const char *symbol_name = get_symbol_64(offset, S, info, n_value);
+  if (symbol_name == nullptr)
+    return 0;
+  return n_value;
+}
+
+// GuessLiteralPointer returns a string which for the item in the Mach-O file
+// for the address passed in as ReferenceValue for printing as a comment with
+// the instruction and also returns the corresponding type of that item
+// indirectly through ReferenceType.
+//
+// If ReferenceValue is an address of literal cstring then a pointer to the
+// cstring is returned and ReferenceType is set to
+// LLVMDisassembler_ReferenceType_Out_LitPool_CstrAddr .
+//
+// If ReferenceValue is an address of an Objective-C CFString, Selector ref or
+// Class ref that name is returned and the ReferenceType is set accordingly.
+//
+// Lastly, literals which are Symbol address in a literal pool are looked for
+// and if found the symbol name is returned and ReferenceType is set to
+// LLVMDisassembler_ReferenceType_Out_LitPool_SymAddr .
+//
+// If there is no item in the Mach-O file for the address passed in as
+// ReferenceValue nullptr is returned and ReferenceType is unchanged.
+const char *GuessLiteralPointer(uint64_t ReferenceValue, uint64_t ReferencePC,
+                                uint64_t *ReferenceType,
+                                struct DisassembleInfo *info) {
+  // First see if there is an external relocation entry at the ReferencePC.
+  uint64_t sect_addr = info->S.getAddress();
+  uint64_t sect_offset = ReferencePC - sect_addr;
+  bool reloc_found = false;
+  DataRefImpl Rel;
+  MachO::any_relocation_info RE;
+  bool isExtern = false;
+  SymbolRef Symbol;
+  for (const RelocationRef &Reloc : info->S.relocations()) {
+    uint64_t RelocOffset;
+    Reloc.getOffset(RelocOffset);
+    if (RelocOffset == sect_offset) {
+      Rel = Reloc.getRawDataRefImpl();
+      RE = info->O->getRelocation(Rel);
+      if (info->O->isRelocationScattered(RE))
+        continue;
+      isExtern = info->O->getPlainRelocationExternal(RE);
+      if (isExtern) {
+        symbol_iterator RelocSym = Reloc.getSymbol();
+        Symbol = *RelocSym;
+      }
+      reloc_found = true;
+      break;
+    }
+  }
+  // If there is an external relocation entry for a symbol in a section
+  // then used that symbol's value for the value of the reference.
+  if (reloc_found && isExtern) {
+    if (info->O->getAnyRelocationPCRel(RE)) {
+      unsigned Type = info->O->getAnyRelocationType(RE);
+      if (Type == MachO::X86_64_RELOC_SIGNED) {
+        Symbol.getAddress(ReferenceValue);
+      }
+    }
+  }
+
+  // Look for literals such as Objective-C CFStrings refs, Selector refs,
+  // Message refs and Class refs.
+  bool classref, selref, msgref, cfstring;
+  uint64_t pointer_value = GuessPointerPointer(ReferenceValue, info, classref,
+                                               selref, msgref, cfstring);
+  if (classref == true && pointer_value == 0) {
+    // Note the ReferenceValue is a pointer into the __objc_classrefs section.
+    // And the pointer_value in that section is typically zero as it will be
+    // set by dyld as part of the "bind information".
+    const char *name = get_dyld_bind_info_symbolname(ReferenceValue, info);
+    if (name != nullptr) {
+      *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Class_Ref;
+      const char *class_name = strrchr(name, '$');
+      if (class_name != nullptr && class_name[1] == '_' &&
+          class_name[2] != '\0') {
+        info->class_name = class_name + 2;
+        return name;
+      }
+    }
+  }
+
+  if (classref == true) {
+    *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Class_Ref;
+    const char *name =
+        get_objc2_64bit_class_name(pointer_value, ReferenceValue, info);
+    if (name != nullptr)
+      info->class_name = name;
+    else
+      name = "bad class ref";
+    return name;
+  }
+
+  if (cfstring == true) {
+    *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_CFString_Ref;
+    const char *name = get_objc2_64bit_cfstring_name(ReferenceValue, info);
+    return name;
+  }
+
+  if (selref == true && pointer_value == 0)
+    pointer_value = get_objc2_64bit_selref(ReferenceValue, info);
+
+  if (pointer_value != 0)
+    ReferenceValue = pointer_value;
+
+  const char *name = GuessCstringPointer(ReferenceValue, info);
+  if (name) {
+    if (pointer_value != 0 && selref == true) {
+      *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Selector_Ref;
+      info->selector_name = name;
+    } else if (pointer_value != 0 && msgref == true) {
+      info->class_name = nullptr;
+      *ReferenceType = LLVMDisassembler_ReferenceType_Out_Objc_Message_Ref;
+      info->selector_name = name;
+    } else
+      *ReferenceType = LLVMDisassembler_ReferenceType_Out_LitPool_CstrAddr;
+    return name;
+  }
+
+  // Lastly look for an indirect symbol with this ReferenceValue which is in
+  // a literal pool.  If found return that symbol name.
+  name = GuessIndirectSymbol(ReferenceValue, info);
+  if (name) {
+    *ReferenceType = LLVMDisassembler_ReferenceType_Out_LitPool_SymAddr;
+    return name;
+  }
+
+  return nullptr;
+}
+
+// SymbolizerSymbolLookUp is the symbol lookup function passed when creating
+// the Symbolizer.  It looks up the ReferenceValue using the info passed via the
+// pointer to the struct DisassembleInfo that was passed when MCSymbolizer
+// is created and returns the symbol name that matches the ReferenceValue or
+// nullptr if none.  The ReferenceType is passed in for the IN type of
+// reference the instruction is making from the values in defined in the header
+// "llvm-c/Disassembler.h".  On return the ReferenceType can set to a specific
+// Out type and the ReferenceName will also be set which is added as a comment
+// to the disassembled instruction.
+//
+#if HAVE_CXXABI_H
+// If the symbol name is a C++ mangled name then the demangled name is
+// returned through ReferenceName and ReferenceType is set to
+// LLVMDisassembler_ReferenceType_DeMangled_Name .
+#endif
+//
+// When this is called to get a symbol name for a branch target then the
+// ReferenceType will be LLVMDisassembler_ReferenceType_In_Branch and then
+// SymbolValue will be looked for in the indirect symbol table to determine if
+// it is an address for a symbol stub.  If so then the symbol name for that
+// stub is returned indirectly through ReferenceName and then ReferenceType is
+// set to LLVMDisassembler_ReferenceType_Out_SymbolStub.
+//
+// When this is called with an value loaded via a PC relative load then
+// ReferenceType will be LLVMDisassembler_ReferenceType_In_PCrel_Load then the
+// SymbolValue is checked to be an address of literal pointer, symbol pointer,
+// or an Objective-C meta data reference.  If so the output ReferenceType is
+// set to correspond to that as well as setting the ReferenceName.
+const char *SymbolizerSymbolLookUp(void *DisInfo, uint64_t ReferenceValue,
+                                   uint64_t *ReferenceType,
+                                   uint64_t ReferencePC,
+                                   const char **ReferenceName) {
+  struct DisassembleInfo *info = (struct DisassembleInfo *)DisInfo;
+  // If no verbose symbolic information is wanted then just return nullptr.
+  if (info->verbose == false) {
+    *ReferenceName = nullptr;
+    *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
+    return nullptr;
+  }
+
+  const char *SymbolName = GuessSymbolName(ReferenceValue, info);
+
+  if (*ReferenceType == LLVMDisassembler_ReferenceType_In_Branch) {
+    *ReferenceName = GuessIndirectSymbol(ReferenceValue, info);
+    if (*ReferenceName != nullptr) {
+      method_reference(info, ReferenceType, ReferenceName);
+      if (*ReferenceType != LLVMDisassembler_ReferenceType_Out_Objc_Message)
+        *ReferenceType = LLVMDisassembler_ReferenceType_Out_SymbolStub;
+    } else
+#if HAVE_CXXABI_H
+        if (SymbolName != nullptr && strncmp(SymbolName, "__Z", 3) == 0) {
+      if (info->demangled_name != nullptr)
+        free(info->demangled_name);
+      int status;
+      info->demangled_name =
+          abi::__cxa_demangle(SymbolName + 1, nullptr, nullptr, &status);
+      if (info->demangled_name != nullptr) {
+        *ReferenceName = info->demangled_name;
+        *ReferenceType = LLVMDisassembler_ReferenceType_DeMangled_Name;
+      } else
+        *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
+    } else
+#endif
+      *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
+  } else if (*ReferenceType == LLVMDisassembler_ReferenceType_In_PCrel_Load) {
+    *ReferenceName =
+        GuessLiteralPointer(ReferenceValue, ReferencePC, ReferenceType, info);
+    if (*ReferenceName)
+      method_reference(info, ReferenceType, ReferenceName);
+    else
+      *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
+    // If this is arm64 and the reference is an adrp instruction save the
+    // instruction, passed in ReferenceValue and the address of the instruction
+    // for use later if we see and add immediate instruction.
+  } else if (info->O->getArch() == Triple::aarch64 &&
+             *ReferenceType == LLVMDisassembler_ReferenceType_In_ARM64_ADRP) {
+    info->adrp_inst = ReferenceValue;
+    info->adrp_addr = ReferencePC;
+    SymbolName = nullptr;
+    *ReferenceName = nullptr;
+    *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
+    // If this is arm64 and reference is an add immediate instruction and we
+    // have
+    // seen an adrp instruction just before it and the adrp's Xd register
+    // matches
+    // this add's Xn register reconstruct the value being referenced and look to
+    // see if it is a literal pointer.  Note the add immediate instruction is
+    // passed in ReferenceValue.
+  } else if (info->O->getArch() == Triple::aarch64 &&
+             *ReferenceType == LLVMDisassembler_ReferenceType_In_ARM64_ADDXri &&
+             ReferencePC - 4 == info->adrp_addr &&
+             (info->adrp_inst & 0x9f000000) == 0x90000000 &&
+             (info->adrp_inst & 0x1f) == ((ReferenceValue >> 5) & 0x1f)) {
+    uint32_t addxri_inst;
+    uint64_t adrp_imm, addxri_imm;
+
+    adrp_imm =
+        ((info->adrp_inst & 0x00ffffe0) >> 3) | ((info->adrp_inst >> 29) & 0x3);
+    if (info->adrp_inst & 0x0200000)
+      adrp_imm |= 0xfffffffffc000000LL;
+
+    addxri_inst = ReferenceValue;
+    addxri_imm = (addxri_inst >> 10) & 0xfff;
+    if (((addxri_inst >> 22) & 0x3) == 1)
+      addxri_imm <<= 12;
+
+    ReferenceValue = (info->adrp_addr & 0xfffffffffffff000LL) +
+                     (adrp_imm << 12) + addxri_imm;
+
+    *ReferenceName =
+        GuessLiteralPointer(ReferenceValue, ReferencePC, ReferenceType, info);
+    if (*ReferenceName == nullptr)
+      *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
+    // If this is arm64 and the reference is a load register instruction and we
+    // have seen an adrp instruction just before it and the adrp's Xd register
+    // matches this add's Xn register reconstruct the value being referenced and
+    // look to see if it is a literal pointer.  Note the load register
+    // instruction is passed in ReferenceValue.
+  } else if (info->O->getArch() == Triple::aarch64 &&
+             *ReferenceType == LLVMDisassembler_ReferenceType_In_ARM64_LDRXui &&
+             ReferencePC - 4 == info->adrp_addr &&
+             (info->adrp_inst & 0x9f000000) == 0x90000000 &&
+             (info->adrp_inst & 0x1f) == ((ReferenceValue >> 5) & 0x1f)) {
+    uint32_t ldrxui_inst;
+    uint64_t adrp_imm, ldrxui_imm;
+
+    adrp_imm =
+        ((info->adrp_inst & 0x00ffffe0) >> 3) | ((info->adrp_inst >> 29) & 0x3);
+    if (info->adrp_inst & 0x0200000)
+      adrp_imm |= 0xfffffffffc000000LL;
+
+    ldrxui_inst = ReferenceValue;
+    ldrxui_imm = (ldrxui_inst >> 10) & 0xfff;
+
+    ReferenceValue = (info->adrp_addr & 0xfffffffffffff000LL) +
+                     (adrp_imm << 12) + (ldrxui_imm << 3);
+
+    *ReferenceName =
+        GuessLiteralPointer(ReferenceValue, ReferencePC, ReferenceType, info);
+    if (*ReferenceName == nullptr)
+      *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
+  }
+  // If this arm64 and is an load register (PC-relative) instruction the
+  // ReferenceValue is the PC plus the immediate value.
+  else if (info->O->getArch() == Triple::aarch64 &&
+           (*ReferenceType == LLVMDisassembler_ReferenceType_In_ARM64_LDRXl ||
+            *ReferenceType == LLVMDisassembler_ReferenceType_In_ARM64_ADR)) {
+    *ReferenceName =
+        GuessLiteralPointer(ReferenceValue, ReferencePC, ReferenceType, info);
+    if (*ReferenceName == nullptr)
+      *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
+  }
+#if HAVE_CXXABI_H
+  else if (SymbolName != nullptr && strncmp(SymbolName, "__Z", 3) == 0) {
+    if (info->demangled_name != nullptr)
+      free(info->demangled_name);
+    int status;
+    info->demangled_name =
+        abi::__cxa_demangle(SymbolName + 1, nullptr, nullptr, &status);
+    if (info->demangled_name != nullptr) {
+      *ReferenceName = info->demangled_name;
+      *ReferenceType = LLVMDisassembler_ReferenceType_DeMangled_Name;
+    }
+  }
+#endif
+  else {
+    *ReferenceName = nullptr;
+    *ReferenceType = LLVMDisassembler_ReferenceType_InOut_None;
+  }
+
+  return SymbolName;
+}
+
+/// \brief Emits the comments that are stored in the CommentStream.
+/// Each comment in the CommentStream must end with a newline.
+static void emitComments(raw_svector_ostream &CommentStream,
+                         SmallString<128> &CommentsToEmit,
+                         formatted_raw_ostream &FormattedOS,
+                         const MCAsmInfo &MAI) {
+  // Flush the stream before taking its content.
+  CommentStream.flush();
+  StringRef Comments = CommentsToEmit.str();
+  // Get the default information for printing a comment.
+  const char *CommentBegin = MAI.getCommentString();
+  unsigned CommentColumn = MAI.getCommentColumn();
+  bool IsFirst = true;
+  while (!Comments.empty()) {
+    if (!IsFirst)
+      FormattedOS << '\n';
+    // Emit a line of comments.
+    FormattedOS.PadToColumn(CommentColumn);
+    size_t Position = Comments.find('\n');
+    FormattedOS << CommentBegin << ' ' << Comments.substr(0, Position);
+    // Move after the newline character.
+    Comments = Comments.substr(Position + 1);
+    IsFirst = false;
+  }
+  FormattedOS.flush();
+
+  // Tell the comment stream that the vector changed underneath it.
+  CommentsToEmit.clear();
+  CommentStream.resync();
+}
+
+static void DisassembleMachO(StringRef Filename, MachOObjectFile *MachOOF) {
+  const char *McpuDefault = nullptr;
+  const Target *ThumbTarget = nullptr;
+  const Target *TheTarget = GetTarget(MachOOF, &McpuDefault, &ThumbTarget);
   if (!TheTarget) {
     // GetTarget prints out stuff.
     return;
   }
+  if (MCPU.empty() && McpuDefault)
+    MCPU = McpuDefault;
+
   std::unique_ptr<const MCInstrInfo> InstrInfo(TheTarget->createMCInstrInfo());
-  std::unique_ptr<MCInstrAnalysis> InstrAnalysis(
-      TheTarget->createMCInstrAnalysis(InstrInfo.get()));
+  std::unique_ptr<const MCInstrInfo> ThumbInstrInfo;
+  if (ThumbTarget)
+    ThumbInstrInfo.reset(ThumbTarget->createMCInstrInfo());
+
+  // Package up features to be passed to target/subtarget
+  std::string FeaturesStr;
+  if (MAttrs.size()) {
+    SubtargetFeatures Features;
+    for (unsigned i = 0; i != MAttrs.size(); ++i)
+      Features.AddFeature(MAttrs[i]);
+    FeaturesStr = Features.getString();
+  }
 
   // Set up disassembler.
   std::unique_ptr<const MCRegisterInfo> MRI(
@@ -225,26 +2048,84 @@ static void DisassembleInputMachO2(StringRef Filename,
   std::unique_ptr<const MCAsmInfo> AsmInfo(
       TheTarget->createMCAsmInfo(*MRI, TripleName));
   std::unique_ptr<const MCSubtargetInfo> STI(
-      TheTarget->createMCSubtargetInfo(TripleName, "", ""));
+      TheTarget->createMCSubtargetInfo(TripleName, MCPU, FeaturesStr));
   MCContext Ctx(AsmInfo.get(), MRI.get(), nullptr);
-  std::unique_ptr<const MCDisassembler> DisAsm(
-    TheTarget->createMCDisassembler(*STI, Ctx));
+  std::unique_ptr<MCDisassembler> DisAsm(
+      TheTarget->createMCDisassembler(*STI, Ctx));
+  std::unique_ptr<MCSymbolizer> Symbolizer;
+  struct DisassembleInfo SymbolizerInfo;
+  std::unique_ptr<MCRelocationInfo> RelInfo(
+      TheTarget->createMCRelocationInfo(TripleName, Ctx));
+  if (RelInfo) {
+    Symbolizer.reset(TheTarget->createMCSymbolizer(
+        TripleName, SymbolizerGetOpInfo, SymbolizerSymbolLookUp,
+        &SymbolizerInfo, &Ctx, RelInfo.release()));
+    DisAsm->setSymbolizer(std::move(Symbolizer));
+  }
   int AsmPrinterVariant = AsmInfo->getAssemblerDialect();
   std::unique_ptr<MCInstPrinter> IP(TheTarget->createMCInstPrinter(
       AsmPrinterVariant, *AsmInfo, *InstrInfo, *MRI, *STI));
+  // Set the display preference for hex vs. decimal immediates.
+  IP->setPrintImmHex(PrintImmHex);
+  // Comment stream and backing vector.
+  SmallString<128> CommentsToEmit;
+  raw_svector_ostream CommentStream(CommentsToEmit);
+  // FIXME: Setting the CommentStream in the InstPrinter is problematic in that
+  // if it is done then arm64 comments for string literals don't get printed
+  // and some constant get printed instead and not setting it causes intel
+  // (32-bit and 64-bit) comments printed with different spacing before the
+  // comment causing different diffs with the 'C' disassembler library API.
+  // IP->setCommentStream(CommentStream);
 
-  if (!InstrAnalysis || !AsmInfo || !STI || !DisAsm || !IP) {
+  if (!AsmInfo || !STI || !DisAsm || !IP) {
     errs() << "error: couldn't initialize disassembler for target "
            << TripleName << '\n';
     return;
   }
 
-  outs() << '\n' << Filename << ":\n\n";
+  // Set up thumb disassembler.
+  std::unique_ptr<const MCRegisterInfo> ThumbMRI;
+  std::unique_ptr<const MCAsmInfo> ThumbAsmInfo;
+  std::unique_ptr<const MCSubtargetInfo> ThumbSTI;
+  std::unique_ptr<MCDisassembler> ThumbDisAsm;
+  std::unique_ptr<MCInstPrinter> ThumbIP;
+  std::unique_ptr<MCContext> ThumbCtx;
+  std::unique_ptr<MCSymbolizer> ThumbSymbolizer;
+  struct DisassembleInfo ThumbSymbolizerInfo;
+  std::unique_ptr<MCRelocationInfo> ThumbRelInfo;
+  if (ThumbTarget) {
+    ThumbMRI.reset(ThumbTarget->createMCRegInfo(ThumbTripleName));
+    ThumbAsmInfo.reset(
+        ThumbTarget->createMCAsmInfo(*ThumbMRI, ThumbTripleName));
+    ThumbSTI.reset(
+        ThumbTarget->createMCSubtargetInfo(ThumbTripleName, MCPU, FeaturesStr));
+    ThumbCtx.reset(new MCContext(ThumbAsmInfo.get(), ThumbMRI.get(), nullptr));
+    ThumbDisAsm.reset(ThumbTarget->createMCDisassembler(*ThumbSTI, *ThumbCtx));
+    MCContext *PtrThumbCtx = ThumbCtx.get();
+    ThumbRelInfo.reset(
+        ThumbTarget->createMCRelocationInfo(ThumbTripleName, *PtrThumbCtx));
+    if (ThumbRelInfo) {
+      ThumbSymbolizer.reset(ThumbTarget->createMCSymbolizer(
+          ThumbTripleName, SymbolizerGetOpInfo, SymbolizerSymbolLookUp,
+          &ThumbSymbolizerInfo, PtrThumbCtx, ThumbRelInfo.release()));
+      ThumbDisAsm->setSymbolizer(std::move(ThumbSymbolizer));
+    }
+    int ThumbAsmPrinterVariant = ThumbAsmInfo->getAssemblerDialect();
+    ThumbIP.reset(ThumbTarget->createMCInstPrinter(
+        ThumbAsmPrinterVariant, *ThumbAsmInfo, *ThumbInstrInfo, *ThumbMRI,
+        *ThumbSTI));
+    // Set the display preference for hex vs. decimal immediates.
+    ThumbIP->setPrintImmHex(PrintImmHex);
+  }
+
+  if (ThumbTarget && (!ThumbAsmInfo || !ThumbSTI || !ThumbDisAsm || !ThumbIP)) {
+    errs() << "error: couldn't initialize disassembler for target "
+           << ThumbTripleName << '\n';
+    return;
+  }
 
   MachO::mach_header Header = MachOOF->getHeader();
 
-  // FIXME: FoundFns isn't used anymore. Using symbols/LC_FUNCTION_STARTS to
-  // determine function locations will eventually go in MCObjectDisassembler.
   // FIXME: Using the -cfg command line option, this code used to be able to
   // annotate relocations with the referenced symbol's name, and if this was
   // inside a __[cf]string section, the data it points to. This is now replaced
@@ -263,7 +2144,7 @@ static void DisassembleInputMachO2(StringRef Filename,
   // Build a data in code table that is sorted on by the address of each entry.
   uint64_t BaseAddress = 0;
   if (Header.filetype == MachO::MH_OBJECT)
-    Sections[0].getAddress(BaseAddress);
+    BaseAddress = Sections[0].getAddress();
   else
     BaseAddress = BaseSegmentAddress;
   DiceTable Dices;
@@ -288,29 +2169,38 @@ static void DisassembleInputMachO2(StringRef Filename,
     // A separate DSym file path was specified, parse it as a macho file,
     // get the sections and supply it to the section name parsing machinery.
     if (!DSYMFile.empty()) {
-      ErrorOr<std::unique_ptr<MemoryBuffer>> Buf =
+      ErrorOr<std::unique_ptr<MemoryBuffer>> BufOrErr =
           MemoryBuffer::getFileOrSTDIN(DSYMFile);
-      if (std::error_code EC = Buf.getError()) {
+      if (std::error_code EC = BufOrErr.getError()) {
         errs() << "llvm-objdump: " << Filename << ": " << EC.message() << '\n';
         return;
       }
-      DbgObj = ObjectFile::createMachOObjectFile(Buf.get()).get();
+      DbgObj =
+          ObjectFile::createMachOObjectFile(BufOrErr.get()->getMemBufferRef())
+              .get()
+              .release();
     }
 
     // Setup the DIContext
-    diContext.reset(DIContext::getDWARFContext(DbgObj));
+    diContext.reset(DIContext::getDWARFContext(*DbgObj));
   }
 
+  // TODO: For now this only disassembles the (__TEXT,__text) section (see the
+  // checks in the code below at the top of this loop).  It should allow a
+  // darwin otool(1) like -s option to disassemble any named segment & section
+  // that is marked as containing instructions with the attributes
+  // S_ATTR_PURE_INSTRUCTIONS or S_ATTR_SOME_INSTRUCTIONS in the flags field of
+  // the section structure.
+  outs() << "(__TEXT,__text) section\n";
+
   for (unsigned SectIdx = 0; SectIdx != Sections.size(); SectIdx++) {
 
-    bool SectIsText = false;
-    Sections[SectIdx].isText(SectIsText);
+    bool SectIsText = Sections[SectIdx].isText();
     if (SectIsText == false)
       continue;
 
     StringRef SectName;
-    if (Sections[SectIdx].getName(SectName) ||
-        SectName != "__text")
+    if (Sections[SectIdx].getName(SectName) || SectName != "__text")
       continue; // Skip non-text sections
 
     DataRefImpl DR = Sections[SectIdx].getRawDataRefImpl();
@@ -319,17 +2209,20 @@ static void DisassembleInputMachO2(StringRef Filename,
     if (SegmentName != "__TEXT")
       continue;
 
-    StringRef Bytes;
-    Sections[SectIdx].getContents(Bytes);
-    StringRefMemoryObject memoryObject(Bytes);
+    StringRef BytesStr;
+    Sections[SectIdx].getContents(BytesStr);
+    ArrayRef<uint8_t> Bytes(reinterpret_cast<const uint8_t *>(BytesStr.data()),
+                            BytesStr.size());
+    uint64_t SectAddress = Sections[SectIdx].getAddress();
+
     bool symbolTableWorked = false;
 
     // Parse relocations.
     std::vector<std::pair<uint64_t, SymbolRef>> Relocs;
     for (const RelocationRef &Reloc : Sections[SectIdx].relocations()) {
-      uint64_t RelocOffset, SectionAddress;
+      uint64_t RelocOffset;
       Reloc.getOffset(RelocOffset);
-      Sections[SectIdx].getAddress(SectionAddress);
+      uint64_t SectionAddress = Sections[SectIdx].getAddress();
       RelocOffset -= SectionAddress;
 
       symbol_iterator RelocSym = Reloc.getSymbol();
@@ -338,6 +2231,48 @@ static void DisassembleInputMachO2(StringRef Filename,
     }
     array_pod_sort(Relocs.begin(), Relocs.end());
 
+    // Create a map of symbol addresses to symbol names for use by
+    // the SymbolizerSymbolLookUp() routine.
+    SymbolAddressMap AddrMap;
+    for (const SymbolRef &Symbol : MachOOF->symbols()) {
+      SymbolRef::Type ST;
+      Symbol.getType(ST);
+      if (ST == SymbolRef::ST_Function || ST == SymbolRef::ST_Data ||
+          ST == SymbolRef::ST_Other) {
+        uint64_t Address;
+        Symbol.getAddress(Address);
+        StringRef SymName;
+        Symbol.getName(SymName);
+        AddrMap[Address] = SymName;
+      }
+    }
+    // Set up the block of info used by the Symbolizer call backs.
+    SymbolizerInfo.verbose = true;
+    SymbolizerInfo.O = MachOOF;
+    SymbolizerInfo.S = Sections[SectIdx];
+    SymbolizerInfo.AddrMap = &AddrMap;
+    SymbolizerInfo.Sections = &Sections;
+    SymbolizerInfo.class_name = nullptr;
+    SymbolizerInfo.selector_name = nullptr;
+    SymbolizerInfo.method = nullptr;
+    SymbolizerInfo.demangled_name = nullptr;
+    SymbolizerInfo.bindtable = nullptr;
+    SymbolizerInfo.adrp_addr = 0;
+    SymbolizerInfo.adrp_inst = 0;
+    // Same for the ThumbSymbolizer
+    ThumbSymbolizerInfo.verbose = true;
+    ThumbSymbolizerInfo.O = MachOOF;
+    ThumbSymbolizerInfo.S = Sections[SectIdx];
+    ThumbSymbolizerInfo.AddrMap = &AddrMap;
+    ThumbSymbolizerInfo.Sections = &Sections;
+    ThumbSymbolizerInfo.class_name = nullptr;
+    ThumbSymbolizerInfo.selector_name = nullptr;
+    ThumbSymbolizerInfo.method = nullptr;
+    ThumbSymbolizerInfo.demangled_name = nullptr;
+    ThumbSymbolizerInfo.bindtable = nullptr;
+    ThumbSymbolizerInfo.adrp_addr = 0;
+    ThumbSymbolizerInfo.adrp_inst = 0;
+
     // Disassemble symbol by symbol.
     for (unsigned SymIdx = 0; SymIdx != Symbols.size(); SymIdx++) {
       StringRef SymName;
@@ -349,15 +2284,13 @@ static void DisassembleInputMachO2(StringRef Filename,
         continue;
 
       // Make sure the symbol is defined in this section.
-      bool containsSym = false;
-      Sections[SectIdx].containsSymbol(Symbols[SymIdx], containsSym);
+      bool containsSym = Sections[SectIdx].containsSymbol(Symbols[SymIdx]);
       if (!containsSym)
         continue;
 
       // Start at the address of the symbol relative to the section's address.
-      uint64_t SectionAddress = 0;
       uint64_t Start = 0;
-      Sections[SectIdx].getAddress(SectionAddress);
+      uint64_t SectionAddress = Sections[SectIdx].getAddress();
       Symbols[SymIdx].getAddress(Start);
       Start -= SectionAddress;
 
@@ -365,13 +2298,13 @@ static void DisassembleInputMachO2(StringRef Filename,
       // the end of the section.
       bool containsNextSym = false;
       uint64_t NextSym = 0;
-      uint64_t NextSymIdx = SymIdx+1;
+      uint64_t NextSymIdx = SymIdx + 1;
       while (Symbols.size() > NextSymIdx) {
         SymbolRef::Type NextSymType;
         Symbols[NextSymIdx].getType(NextSymType);
         if (NextSymType == SymbolRef::ST_Function) {
-          Sections[SectIdx].containsSymbol(Symbols[NextSymIdx],
-                                           containsNextSym);
+          containsNextSym =
+              Sections[SectIdx].containsSymbol(Symbols[NextSymIdx]);
           Symbols[NextSymIdx].getAddress(NextSym);
           NextSym -= SectionAddress;
           break;
@@ -379,48 +2312,81 @@ static void DisassembleInputMachO2(StringRef Filename,
         ++NextSymIdx;
       }
 
-      uint64_t SectSize;
-      Sections[SectIdx].getSize(SectSize);
-      uint64_t End = containsNextSym ?  NextSym : SectSize;
+      uint64_t SectSize = Sections[SectIdx].getSize();
+      uint64_t End = containsNextSym ? NextSym : SectSize;
       uint64_t Size;
 
       symbolTableWorked = true;
 
+      DataRefImpl Symb = Symbols[SymIdx].getRawDataRefImpl();
+      bool isThumb =
+          (MachOOF->getSymbolFlags(Symb) & SymbolRef::SF_Thumb) && ThumbTarget;
+
       outs() << SymName << ":\n";
       DILineInfo lastLine;
       for (uint64_t Index = Start; Index < End; Index += Size) {
         MCInst Inst;
 
-        uint64_t SectAddress = 0;
-        Sections[SectIdx].getAddress(SectAddress);
-        outs() << format("%8" PRIx64 ":\t", SectAddress + Index);
+        uint64_t PC = SectAddress + Index;
+        if (FullLeadingAddr) {
+          if (MachOOF->is64Bit())
+            outs() << format("%016" PRIx64, PC);
+          else
+            outs() << format("%08" PRIx64, PC);
+        } else {
+          outs() << format("%8" PRIx64 ":", PC);
+        }
+        if (!NoShowRawInsn)
+          outs() << "\t";
 
         // Check the data in code table here to see if this is data not an
         // instruction to be disassembled.
         DiceTable Dice;
-        Dice.push_back(std::make_pair(SectAddress + Index, DiceRef()));
-        dice_table_iterator DTI = std::search(Dices.begin(), Dices.end(),
-                                              Dice.begin(), Dice.end(),
-                                              compareDiceTableEntries);
-        if (DTI != Dices.end()){
+        Dice.push_back(std::make_pair(PC, DiceRef()));
+        dice_table_iterator DTI =
+            std::search(Dices.begin(), Dices.end(), Dice.begin(), Dice.end(),
+                        compareDiceTableEntries);
+        if (DTI != Dices.end()) {
           uint16_t Length;
           DTI->second.getLength(Length);
-          DumpBytes(StringRef(Bytes.data() + Index, Length));
           uint16_t Kind;
           DTI->second.getKind(Kind);
-          DumpDataInCode(Bytes.data() + Index, Length, Kind);
+          Size = DumpDataInCode(reinterpret_cast<const char *>(Bytes.data()) +
+                                    Index,
+                                Length, Kind);
+          if ((Kind == MachO::DICE_KIND_JUMP_TABLE8) &&
+              (PC == (DTI->first + Length - 1)) && (Length & 1))
+            Size++;
           continue;
         }
 
-        if (DisAsm->getInstruction(Inst, Size, memoryObject, Index,
-                                   DebugOut, nulls())) {
-          DumpBytes(StringRef(Bytes.data() + Index, Size));
-          IP->printInst(&Inst, outs(), "");
+        SmallVector<char, 64> AnnotationsBytes;
+        raw_svector_ostream Annotations(AnnotationsBytes);
+
+        bool gotInst;
+        if (isThumb)
+          gotInst = ThumbDisAsm->getInstruction(Inst, Size, Bytes.slice(Index),
+                                                PC, DebugOut, Annotations);
+        else
+          gotInst = DisAsm->getInstruction(Inst, Size, Bytes.slice(Index), PC,
+                                           DebugOut, Annotations);
+        if (gotInst) {
+          if (!NoShowRawInsn) {
+            DumpBytes(StringRef(
+                reinterpret_cast<const char *>(Bytes.data()) + Index, Size));
+          }
+          formatted_raw_ostream FormattedOS(outs());
+          Annotations.flush();
+          StringRef AnnotationsStr = Annotations.str();
+          if (isThumb)
+            ThumbIP->printInst(&Inst, FormattedOS, AnnotationsStr);
+          else
+            IP->printInst(&Inst, FormattedOS, AnnotationsStr);
+          emitComments(CommentStream, CommentsToEmit, FormattedOS, *AsmInfo);
 
           // Print debug info.
           if (diContext) {
-            DILineInfo dli =
-              diContext->getLineInfoForAddress(SectAddress + Index);
+            DILineInfo dli = diContext->getLineInfoForAddress(PC);
             // Print valid line info if it changed.
             if (dli != lastLine && dli.Line != 0)
               outs() << "\t## " << dli.FileName << ':' << dli.Line << ':'
@@ -429,34 +2395,2508 @@ static void DisassembleInputMachO2(StringRef Filename,
           }
           outs() << "\n";
         } else {
-          errs() << "llvm-objdump: warning: invalid instruction encoding\n";
-          if (Size == 0)
-            Size = 1; // skip illegible bytes
+          unsigned int Arch = MachOOF->getArch();
+          if (Arch == Triple::x86_64 || Arch == Triple::x86) {
+            outs() << format("\t.byte 0x%02x #bad opcode\n",
+                             *(Bytes.data() + Index) & 0xff);
+            Size = 1; // skip exactly one illegible byte and move on.
+          } else if (Arch == Triple::aarch64) {
+            uint32_t opcode = (*(Bytes.data() + Index) & 0xff) |
+                              (*(Bytes.data() + Index + 1) & 0xff) << 8 |
+                              (*(Bytes.data() + Index + 2) & 0xff) << 16 |
+                              (*(Bytes.data() + Index + 3) & 0xff) << 24;
+            outs() << format("\t.long\t0x%08x\n", opcode);
+            Size = 4;
+          } else {
+            errs() << "llvm-objdump: warning: invalid instruction encoding\n";
+            if (Size == 0)
+              Size = 1; // skip illegible bytes
+          }
         }
       }
     }
     if (!symbolTableWorked) {
-      // Reading the symbol table didn't work, disassemble the whole section. 
-      uint64_t SectAddress;
-      Sections[SectIdx].getAddress(SectAddress);
-      uint64_t SectSize;
-      Sections[SectIdx].getSize(SectSize);
+      // Reading the symbol table didn't work, disassemble the whole section.
+      uint64_t SectAddress = Sections[SectIdx].getAddress();
+      uint64_t SectSize = Sections[SectIdx].getSize();
       uint64_t InstSize;
       for (uint64_t Index = 0; Index < SectSize; Index += InstSize) {
         MCInst Inst;
 
-        if (DisAsm->getInstruction(Inst, InstSize, memoryObject, Index,
+        uint64_t PC = SectAddress + Index;
+        if (DisAsm->getInstruction(Inst, InstSize, Bytes.slice(Index), PC,
                                    DebugOut, nulls())) {
-          outs() << format("%8" PRIx64 ":\t", SectAddress + Index);
-          DumpBytes(StringRef(Bytes.data() + Index, InstSize));
+          if (FullLeadingAddr) {
+            if (MachOOF->is64Bit())
+              outs() << format("%016" PRIx64, PC);
+            else
+              outs() << format("%08" PRIx64, PC);
+          } else {
+            outs() << format("%8" PRIx64 ":", PC);
+          }
+          if (!NoShowRawInsn) {
+            outs() << "\t";
+            DumpBytes(
+                StringRef(reinterpret_cast<const char *>(Bytes.data()) + Index,
+                          InstSize));
+          }
           IP->printInst(&Inst, outs(), "");
           outs() << "\n";
         } else {
-          errs() << "llvm-objdump: warning: invalid instruction encoding\n";
-          if (InstSize == 0)
-            InstSize = 1; // skip illegible bytes
+          unsigned int Arch = MachOOF->getArch();
+          if (Arch == Triple::x86_64 || Arch == Triple::x86) {
+            outs() << format("\t.byte 0x%02x #bad opcode\n",
+                             *(Bytes.data() + Index) & 0xff);
+            InstSize = 1; // skip exactly one illegible byte and move on.
+          } else {
+            errs() << "llvm-objdump: warning: invalid instruction encoding\n";
+            if (InstSize == 0)
+              InstSize = 1; // skip illegible bytes
+          }
         }
       }
     }
+    // The TripleName's need to be reset if we are called again for a different
+    // archtecture.
+    TripleName = "";
+    ThumbTripleName = "";
+
+    if (SymbolizerInfo.method != nullptr)
+      free(SymbolizerInfo.method);
+    if (SymbolizerInfo.demangled_name != nullptr)
+      free(SymbolizerInfo.demangled_name);
+    if (SymbolizerInfo.bindtable != nullptr)
+      delete SymbolizerInfo.bindtable;
+    if (ThumbSymbolizerInfo.method != nullptr)
+      free(ThumbSymbolizerInfo.method);
+    if (ThumbSymbolizerInfo.demangled_name != nullptr)
+      free(ThumbSymbolizerInfo.demangled_name);
+    if (ThumbSymbolizerInfo.bindtable != nullptr)
+      delete ThumbSymbolizerInfo.bindtable;
   }
 }
+
+//===----------------------------------------------------------------------===//
+// __compact_unwind section dumping
+//===----------------------------------------------------------------------===//
+
+namespace {
+
+template <typename T> static uint64_t readNext(const char *&Buf) {
+  using llvm::support::little;
+  using llvm::support::unaligned;
+
+  uint64_t Val = support::endian::read<T, little, unaligned>(Buf);
+  Buf += sizeof(T);
+  return Val;
+}
+
+struct CompactUnwindEntry {
+  uint32_t OffsetInSection;
+
+  uint64_t FunctionAddr;
+  uint32_t Length;
+  uint32_t CompactEncoding;
+  uint64_t PersonalityAddr;
+  uint64_t LSDAAddr;
+
+  RelocationRef FunctionReloc;
+  RelocationRef PersonalityReloc;
+  RelocationRef LSDAReloc;
+
+  CompactUnwindEntry(StringRef Contents, unsigned Offset, bool Is64)
+      : OffsetInSection(Offset) {
+    if (Is64)
+      read<uint64_t>(Contents.data() + Offset);
+    else
+      read<uint32_t>(Contents.data() + Offset);
+  }
+
+private:
+  template <typename UIntPtr> void read(const char *Buf) {
+    FunctionAddr = readNext<UIntPtr>(Buf);
+    Length = readNext<uint32_t>(Buf);
+    CompactEncoding = readNext<uint32_t>(Buf);
+    PersonalityAddr = readNext<UIntPtr>(Buf);
+    LSDAAddr = readNext<UIntPtr>(Buf);
+  }
+};
+}
+
+/// Given a relocation from __compact_unwind, consisting of the RelocationRef
+/// and data being relocated, determine the best base Name and Addend to use for
+/// display purposes.
+///
+/// 1. An Extern relocation will directly reference a symbol (and the data is
+///    then already an addend), so use that.
+/// 2. Otherwise the data is an offset in the object file's layout; try to find
+//     a symbol before it in the same section, and use the offset from there.
+/// 3. Finally, if all that fails, fall back to an offset from the start of the
+///    referenced section.
+static void findUnwindRelocNameAddend(const MachOObjectFile *Obj,
+                                      std::map<uint64_t, SymbolRef> &Symbols,
+                                      const RelocationRef &Reloc, uint64_t Addr,
+                                      StringRef &Name, uint64_t &Addend) {
+  if (Reloc.getSymbol() != Obj->symbol_end()) {
+    Reloc.getSymbol()->getName(Name);
+    Addend = Addr;
+    return;
+  }
+
+  auto RE = Obj->getRelocation(Reloc.getRawDataRefImpl());
+  SectionRef RelocSection = Obj->getRelocationSection(RE);
+
+  uint64_t SectionAddr = RelocSection.getAddress();
+
+  auto Sym = Symbols.upper_bound(Addr);
+  if (Sym == Symbols.begin()) {
+    // The first symbol in the object is after this reference, the best we can
+    // do is section-relative notation.
+    RelocSection.getName(Name);
+    Addend = Addr - SectionAddr;
+    return;
+  }
+
+  // Go back one so that SymbolAddress <= Addr.
+  --Sym;
+
+  section_iterator SymSection = Obj->section_end();
+  Sym->second.getSection(SymSection);
+  if (RelocSection == *SymSection) {
+    // There's a valid symbol in the same section before this reference.
+    Sym->second.getName(Name);
+    Addend = Addr - Sym->first;
+    return;
+  }
+
+  // There is a symbol before this reference, but it's in a different
+  // section. Probably not helpful to mention it, so use the section name.
+  RelocSection.getName(Name);
+  Addend = Addr - SectionAddr;
+}
+
+static void printUnwindRelocDest(const MachOObjectFile *Obj,
+                                 std::map<uint64_t, SymbolRef> &Symbols,
+                                 const RelocationRef &Reloc, uint64_t Addr) {
+  StringRef Name;
+  uint64_t Addend;
+
+  if (!Reloc.getObjectFile())
+    return;
+
+  findUnwindRelocNameAddend(Obj, Symbols, Reloc, Addr, Name, Addend);
+
+  outs() << Name;
+  if (Addend)
+    outs() << " + " << format("0x%" PRIx64, Addend);
+}
+
+static void
+printMachOCompactUnwindSection(const MachOObjectFile *Obj,
+                               std::map<uint64_t, SymbolRef> &Symbols,
+                               const SectionRef &CompactUnwind) {
+
+  assert(Obj->isLittleEndian() &&
+         "There should not be a big-endian .o with __compact_unwind");
+
+  bool Is64 = Obj->is64Bit();
+  uint32_t PointerSize = Is64 ? sizeof(uint64_t) : sizeof(uint32_t);
+  uint32_t EntrySize = 3 * PointerSize + 2 * sizeof(uint32_t);
+
+  StringRef Contents;
+  CompactUnwind.getContents(Contents);
+
+  SmallVector<CompactUnwindEntry, 4> CompactUnwinds;
+
+  // First populate the initial raw offsets, encodings and so on from the entry.
+  for (unsigned Offset = 0; Offset < Contents.size(); Offset += EntrySize) {
+    CompactUnwindEntry Entry(Contents.data(), Offset, Is64);
+    CompactUnwinds.push_back(Entry);
+  }
+
+  // Next we need to look at the relocations to find out what objects are
+  // actually being referred to.
+  for (const RelocationRef &Reloc : CompactUnwind.relocations()) {
+    uint64_t RelocAddress;
+    Reloc.getOffset(RelocAddress);
+
+    uint32_t EntryIdx = RelocAddress / EntrySize;
+    uint32_t OffsetInEntry = RelocAddress - EntryIdx * EntrySize;
+    CompactUnwindEntry &Entry = CompactUnwinds[EntryIdx];
+
+    if (OffsetInEntry == 0)
+      Entry.FunctionReloc = Reloc;
+    else if (OffsetInEntry == PointerSize + 2 * sizeof(uint32_t))
+      Entry.PersonalityReloc = Reloc;
+    else if (OffsetInEntry == 2 * PointerSize + 2 * sizeof(uint32_t))
+      Entry.LSDAReloc = Reloc;
+    else
+      llvm_unreachable("Unexpected relocation in __compact_unwind section");
+  }
+
+  // Finally, we're ready to print the data we've gathered.
+  outs() << "Contents of __compact_unwind section:\n";
+  for (auto &Entry : CompactUnwinds) {
+    outs() << "  Entry at offset "
+           << format("0x%" PRIx32, Entry.OffsetInSection) << ":\n";
+
+    // 1. Start of the region this entry applies to.
+    outs() << "    start:                " << format("0x%" PRIx64,
+                                                     Entry.FunctionAddr) << ' ';
+    printUnwindRelocDest(Obj, Symbols, Entry.FunctionReloc, Entry.FunctionAddr);
+    outs() << '\n';
+
+    // 2. Length of the region this entry applies to.
+    outs() << "    length:               " << format("0x%" PRIx32, Entry.Length)
+           << '\n';
+    // 3. The 32-bit compact encoding.
+    outs() << "    compact encoding:     "
+           << format("0x%08" PRIx32, Entry.CompactEncoding) << '\n';
+
+    // 4. The personality function, if present.
+    if (Entry.PersonalityReloc.getObjectFile()) {
+      outs() << "    personality function: "
+             << format("0x%" PRIx64, Entry.PersonalityAddr) << ' ';
+      printUnwindRelocDest(Obj, Symbols, Entry.PersonalityReloc,
+                           Entry.PersonalityAddr);
+      outs() << '\n';
+    }
+
+    // 5. This entry's language-specific data area.
+    if (Entry.LSDAReloc.getObjectFile()) {
+      outs() << "    LSDA:                 " << format("0x%" PRIx64,
+                                                       Entry.LSDAAddr) << ' ';
+      printUnwindRelocDest(Obj, Symbols, Entry.LSDAReloc, Entry.LSDAAddr);
+      outs() << '\n';
+    }
+  }
+}
+
+//===----------------------------------------------------------------------===//
+// __unwind_info section dumping
+//===----------------------------------------------------------------------===//
+
+static void printRegularSecondLevelUnwindPage(const char *PageStart) {
+  const char *Pos = PageStart;
+  uint32_t Kind = readNext<uint32_t>(Pos);
+  (void)Kind;
+  assert(Kind == 2 && "kind for a regular 2nd level index should be 2");
+
+  uint16_t EntriesStart = readNext<uint16_t>(Pos);
+  uint16_t NumEntries = readNext<uint16_t>(Pos);
+
+  Pos = PageStart + EntriesStart;
+  for (unsigned i = 0; i < NumEntries; ++i) {
+    uint32_t FunctionOffset = readNext<uint32_t>(Pos);
+    uint32_t Encoding = readNext<uint32_t>(Pos);
+
+    outs() << "      [" << i << "]: "
+           << "function offset=" << format("0x%08" PRIx32, FunctionOffset)
+           << ", "
+           << "encoding=" << format("0x%08" PRIx32, Encoding) << '\n';
+  }
+}
+
+static void printCompressedSecondLevelUnwindPage(
+    const char *PageStart, uint32_t FunctionBase,
+    const SmallVectorImpl<uint32_t> &CommonEncodings) {
+  const char *Pos = PageStart;
+  uint32_t Kind = readNext<uint32_t>(Pos);
+  (void)Kind;
+  assert(Kind == 3 && "kind for a compressed 2nd level index should be 3");
+
+  uint16_t EntriesStart = readNext<uint16_t>(Pos);
+  uint16_t NumEntries = readNext<uint16_t>(Pos);
+
+  uint16_t EncodingsStart = readNext<uint16_t>(Pos);
+  readNext<uint16_t>(Pos);
+  const auto *PageEncodings = reinterpret_cast<const support::ulittle32_t *>(
+      PageStart + EncodingsStart);
+
+  Pos = PageStart + EntriesStart;
+  for (unsigned i = 0; i < NumEntries; ++i) {
+    uint32_t Entry = readNext<uint32_t>(Pos);
+    uint32_t FunctionOffset = FunctionBase + (Entry & 0xffffff);
+    uint32_t EncodingIdx = Entry >> 24;
+
+    uint32_t Encoding;
+    if (EncodingIdx < CommonEncodings.size())
+      Encoding = CommonEncodings[EncodingIdx];
+    else
+      Encoding = PageEncodings[EncodingIdx - CommonEncodings.size()];
+
+    outs() << "      [" << i << "]: "
+           << "function offset=" << format("0x%08" PRIx32, FunctionOffset)
+           << ", "
+           << "encoding[" << EncodingIdx
+           << "]=" << format("0x%08" PRIx32, Encoding) << '\n';
+  }
+}
+
+static void printMachOUnwindInfoSection(const MachOObjectFile *Obj,
+                                        std::map<uint64_t, SymbolRef> &Symbols,
+                                        const SectionRef &UnwindInfo) {
+
+  assert(Obj->isLittleEndian() &&
+         "There should not be a big-endian .o with __unwind_info");
+
+  outs() << "Contents of __unwind_info section:\n";
+
+  StringRef Contents;
+  UnwindInfo.getContents(Contents);
+  const char *Pos = Contents.data();
+
+  //===----------------------------------
+  // Section header
+  //===----------------------------------
+
+  uint32_t Version = readNext<uint32_t>(Pos);
+  outs() << "  Version:                                   "
+         << format("0x%" PRIx32, Version) << '\n';
+  assert(Version == 1 && "only understand version 1");
+
+  uint32_t CommonEncodingsStart = readNext<uint32_t>(Pos);
+  outs() << "  Common encodings array section offset:     "
+         << format("0x%" PRIx32, CommonEncodingsStart) << '\n';
+  uint32_t NumCommonEncodings = readNext<uint32_t>(Pos);
+  outs() << "  Number of common encodings in array:       "
+         << format("0x%" PRIx32, NumCommonEncodings) << '\n';
+
+  uint32_t PersonalitiesStart = readNext<uint32_t>(Pos);
+  outs() << "  Personality function array section offset: "
+         << format("0x%" PRIx32, PersonalitiesStart) << '\n';
+  uint32_t NumPersonalities = readNext<uint32_t>(Pos);
+  outs() << "  Number of personality functions in array:  "
+         << format("0x%" PRIx32, NumPersonalities) << '\n';
+
+  uint32_t IndicesStart = readNext<uint32_t>(Pos);
+  outs() << "  Index array section offset:                "
+         << format("0x%" PRIx32, IndicesStart) << '\n';
+  uint32_t NumIndices = readNext<uint32_t>(Pos);
+  outs() << "  Number of indices in array:                "
+         << format("0x%" PRIx32, NumIndices) << '\n';
+
+  //===----------------------------------
+  // A shared list of common encodings
+  //===----------------------------------
+
+  // These occupy indices in the range [0, N] whenever an encoding is referenced
+  // from a compressed 2nd level index table. In practice the linker only
+  // creates ~128 of these, so that indices are available to embed encodings in
+  // the 2nd level index.
+
+  SmallVector<uint32_t, 64> CommonEncodings;
+  outs() << "  Common encodings: (count = " << NumCommonEncodings << ")\n";
+  Pos = Contents.data() + CommonEncodingsStart;
+  for (unsigned i = 0; i < NumCommonEncodings; ++i) {
+    uint32_t Encoding = readNext<uint32_t>(Pos);
+    CommonEncodings.push_back(Encoding);
+
+    outs() << "    encoding[" << i << "]: " << format("0x%08" PRIx32, Encoding)
+           << '\n';
+  }
+
+  //===----------------------------------
+  // Personality functions used in this executable
+  //===----------------------------------
+
+  // There should be only a handful of these (one per source language,
+  // roughly). Particularly since they only get 2 bits in the compact encoding.
+
+  outs() << "  Personality functions: (count = " << NumPersonalities << ")\n";
+  Pos = Contents.data() + PersonalitiesStart;
+  for (unsigned i = 0; i < NumPersonalities; ++i) {
+    uint32_t PersonalityFn = readNext<uint32_t>(Pos);
+    outs() << "    personality[" << i + 1
+           << "]: " << format("0x%08" PRIx32, PersonalityFn) << '\n';
+  }
+
+  //===----------------------------------
+  // The level 1 index entries
+  //===----------------------------------
+
+  // These specify an approximate place to start searching for the more detailed
+  // information, sorted by PC.
+
+  struct IndexEntry {
+    uint32_t FunctionOffset;
+    uint32_t SecondLevelPageStart;
+    uint32_t LSDAStart;
+  };
+
+  SmallVector<IndexEntry, 4> IndexEntries;
+
+  outs() << "  Top level indices: (count = " << NumIndices << ")\n";
+  Pos = Contents.data() + IndicesStart;
+  for (unsigned i = 0; i < NumIndices; ++i) {
+    IndexEntry Entry;
+
+    Entry.FunctionOffset = readNext<uint32_t>(Pos);
+    Entry.SecondLevelPageStart = readNext<uint32_t>(Pos);
+    Entry.LSDAStart = readNext<uint32_t>(Pos);
+    IndexEntries.push_back(Entry);
+
+    outs() << "    [" << i << "]: "
+           << "function offset=" << format("0x%08" PRIx32, Entry.FunctionOffset)
+           << ", "
+           << "2nd level page offset="
+           << format("0x%08" PRIx32, Entry.SecondLevelPageStart) << ", "
+           << "LSDA offset=" << format("0x%08" PRIx32, Entry.LSDAStart) << '\n';
+  }
+
+  //===----------------------------------
+  // Next come the LSDA tables
+  //===----------------------------------
+
+  // The LSDA layout is rather implicit: it's a contiguous array of entries from
+  // the first top-level index's LSDAOffset to the last (sentinel).
+
+  outs() << "  LSDA descriptors:\n";
+  Pos = Contents.data() + IndexEntries[0].LSDAStart;
+  int NumLSDAs = (IndexEntries.back().LSDAStart - IndexEntries[0].LSDAStart) /
+                 (2 * sizeof(uint32_t));
+  for (int i = 0; i < NumLSDAs; ++i) {
+    uint32_t FunctionOffset = readNext<uint32_t>(Pos);
+    uint32_t LSDAOffset = readNext<uint32_t>(Pos);
+    outs() << "    [" << i << "]: "
+           << "function offset=" << format("0x%08" PRIx32, FunctionOffset)
+           << ", "
+           << "LSDA offset=" << format("0x%08" PRIx32, LSDAOffset) << '\n';
+  }
+
+  //===----------------------------------
+  // Finally, the 2nd level indices
+  //===----------------------------------
+
+  // Generally these are 4K in size, and have 2 possible forms:
+  //   + Regular stores up to 511 entries with disparate encodings
+  //   + Compressed stores up to 1021 entries if few enough compact encoding
+  //     values are used.
+  outs() << "  Second level indices:\n";
+  for (unsigned i = 0; i < IndexEntries.size() - 1; ++i) {
+    // The final sentinel top-level index has no associated 2nd level page
+    if (IndexEntries[i].SecondLevelPageStart == 0)
+      break;
+
+    outs() << "    Second level index[" << i << "]: "
+           << "offset in section="
+           << format("0x%08" PRIx32, IndexEntries[i].SecondLevelPageStart)
+           << ", "
+           << "base function offset="
+           << format("0x%08" PRIx32, IndexEntries[i].FunctionOffset) << '\n';
+
+    Pos = Contents.data() + IndexEntries[i].SecondLevelPageStart;
+    uint32_t Kind = *reinterpret_cast<const support::ulittle32_t *>(Pos);
+    if (Kind == 2)
+      printRegularSecondLevelUnwindPage(Pos);
+    else if (Kind == 3)
+      printCompressedSecondLevelUnwindPage(Pos, IndexEntries[i].FunctionOffset,
+                                           CommonEncodings);
+    else
+      llvm_unreachable("Do not know how to print this kind of 2nd level page");
+  }
+}
+
+void llvm::printMachOUnwindInfo(const MachOObjectFile *Obj) {
+  std::map<uint64_t, SymbolRef> Symbols;
+  for (const SymbolRef &SymRef : Obj->symbols()) {
+    // Discard any undefined or absolute symbols. They're not going to take part
+    // in the convenience lookup for unwind info and just take up resources.
+    section_iterator Section = Obj->section_end();
+    SymRef.getSection(Section);
+    if (Section == Obj->section_end())
+      continue;
+
+    uint64_t Addr;
+    SymRef.getAddress(Addr);
+    Symbols.insert(std::make_pair(Addr, SymRef));
+  }
+
+  for (const SectionRef &Section : Obj->sections()) {
+    StringRef SectName;
+    Section.getName(SectName);
+    if (SectName == "__compact_unwind")
+      printMachOCompactUnwindSection(Obj, Symbols, Section);
+    else if (SectName == "__unwind_info")
+      printMachOUnwindInfoSection(Obj, Symbols, Section);
+    else if (SectName == "__eh_frame")
+      outs() << "llvm-objdump: warning: unhandled __eh_frame section\n";
+  }
+}
+
+static void PrintMachHeader(uint32_t magic, uint32_t cputype,
+                            uint32_t cpusubtype, uint32_t filetype,
+                            uint32_t ncmds, uint32_t sizeofcmds, uint32_t flags,
+                            bool verbose) {
+  outs() << "Mach header\n";
+  outs() << "      magic cputype cpusubtype  caps    filetype ncmds "
+            "sizeofcmds      flags\n";
+  if (verbose) {
+    if (magic == MachO::MH_MAGIC)
+      outs() << "   MH_MAGIC";
+    else if (magic == MachO::MH_MAGIC_64)
+      outs() << "MH_MAGIC_64";
+    else
+      outs() << format(" 0x%08" PRIx32, magic);
+    switch (cputype) {
+    case MachO::CPU_TYPE_I386:
+      outs() << "    I386";
+      switch (cpusubtype & ~MachO::CPU_SUBTYPE_MASK) {
+      case MachO::CPU_SUBTYPE_I386_ALL:
+        outs() << "        ALL";
+        break;
+      default:
+        outs() << format(" %10d", cpusubtype & ~MachO::CPU_SUBTYPE_MASK);
+        break;
+      }
+      break;
+    case MachO::CPU_TYPE_X86_64:
+      outs() << "  X86_64";
+      switch (cpusubtype & ~MachO::CPU_SUBTYPE_MASK) {
+      case MachO::CPU_SUBTYPE_X86_64_ALL:
+        outs() << "        ALL";
+        break;
+      case MachO::CPU_SUBTYPE_X86_64_H:
+        outs() << "    Haswell";
+        break;
+      default:
+        outs() << format(" %10d", cpusubtype & ~MachO::CPU_SUBTYPE_MASK);
+        break;
+      }
+      break;
+    case MachO::CPU_TYPE_ARM:
+      outs() << "     ARM";
+      switch (cpusubtype & ~MachO::CPU_SUBTYPE_MASK) {
+      case MachO::CPU_SUBTYPE_ARM_ALL:
+        outs() << "        ALL";
+        break;
+      case MachO::CPU_SUBTYPE_ARM_V4T:
+        outs() << "        V4T";
+        break;
+      case MachO::CPU_SUBTYPE_ARM_V5TEJ:
+        outs() << "      V5TEJ";
+        break;
+      case MachO::CPU_SUBTYPE_ARM_XSCALE:
+        outs() << "     XSCALE";
+        break;
+      case MachO::CPU_SUBTYPE_ARM_V6:
+        outs() << "         V6";
+        break;
+      case MachO::CPU_SUBTYPE_ARM_V6M:
+        outs() << "        V6M";
+        break;
+      case MachO::CPU_SUBTYPE_ARM_V7:
+        outs() << "         V7";
+        break;
+      case MachO::CPU_SUBTYPE_ARM_V7EM:
+        outs() << "       V7EM";
+        break;
+      case MachO::CPU_SUBTYPE_ARM_V7K:
+        outs() << "        V7K";
+        break;
+      case MachO::CPU_SUBTYPE_ARM_V7M:
+        outs() << "        V7M";
+        break;
+      case MachO::CPU_SUBTYPE_ARM_V7S:
+        outs() << "        V7S";
+        break;
+      default:
+        outs() << format(" %10d", cpusubtype & ~MachO::CPU_SUBTYPE_MASK);
+        break;
+      }
+      break;
+    case MachO::CPU_TYPE_ARM64:
+      outs() << "   ARM64";
+      switch (cpusubtype & ~MachO::CPU_SUBTYPE_MASK) {
+      case MachO::CPU_SUBTYPE_ARM64_ALL:
+        outs() << "        ALL";
+        break;
+      default:
+        outs() << format(" %10d", cpusubtype & ~MachO::CPU_SUBTYPE_MASK);
+        break;
+      }
+      break;
+    case MachO::CPU_TYPE_POWERPC:
+      outs() << "     PPC";
+      switch (cpusubtype & ~MachO::CPU_SUBTYPE_MASK) {
+      case MachO::CPU_SUBTYPE_POWERPC_ALL:
+        outs() << "        ALL";
+        break;
+      default:
+        outs() << format(" %10d", cpusubtype & ~MachO::CPU_SUBTYPE_MASK);
+        break;
+      }
+      break;
+    case MachO::CPU_TYPE_POWERPC64:
+      outs() << "   PPC64";
+      switch (cpusubtype & ~MachO::CPU_SUBTYPE_MASK) {
+      case MachO::CPU_SUBTYPE_POWERPC_ALL:
+        outs() << "        ALL";
+        break;
+      default:
+        outs() << format(" %10d", cpusubtype & ~MachO::CPU_SUBTYPE_MASK);
+        break;
+      }
+      break;
+    }
+    if ((cpusubtype & MachO::CPU_SUBTYPE_MASK) == MachO::CPU_SUBTYPE_LIB64) {
+      outs() << " LIB64";
+    } else {
+      outs() << format("  0x%02" PRIx32,
+                       (cpusubtype & MachO::CPU_SUBTYPE_MASK) >> 24);
+    }
+    switch (filetype) {
+    case MachO::MH_OBJECT:
+      outs() << "      OBJECT";
+      break;
+    case MachO::MH_EXECUTE:
+      outs() << "     EXECUTE";
+      break;
+    case MachO::MH_FVMLIB:
+      outs() << "      FVMLIB";
+      break;
+    case MachO::MH_CORE:
+      outs() << "        CORE";
+      break;
+    case MachO::MH_PRELOAD:
+      outs() << "     PRELOAD";
+      break;
+    case MachO::MH_DYLIB:
+      outs() << "       DYLIB";
+      break;
+    case MachO::MH_DYLIB_STUB:
+      outs() << "  DYLIB_STUB";
+      break;
+    case MachO::MH_DYLINKER:
+      outs() << "    DYLINKER";
+      break;
+    case MachO::MH_BUNDLE:
+      outs() << "      BUNDLE";
+      break;
+    case MachO::MH_DSYM:
+      outs() << "        DSYM";
+      break;
+    case MachO::MH_KEXT_BUNDLE:
+      outs() << "  KEXTBUNDLE";
+      break;
+    default:
+      outs() << format("  %10u", filetype);
+      break;
+    }
+    outs() << format(" %5u", ncmds);
+    outs() << format(" %10u", sizeofcmds);
+    uint32_t f = flags;
+    if (f & MachO::MH_NOUNDEFS) {
+      outs() << "   NOUNDEFS";
+      f &= ~MachO::MH_NOUNDEFS;
+    }
+    if (f & MachO::MH_INCRLINK) {
+      outs() << " INCRLINK";
+      f &= ~MachO::MH_INCRLINK;
+    }
+    if (f & MachO::MH_DYLDLINK) {
+      outs() << " DYLDLINK";
+      f &= ~MachO::MH_DYLDLINK;
+    }
+    if (f & MachO::MH_BINDATLOAD) {
+      outs() << " BINDATLOAD";
+      f &= ~MachO::MH_BINDATLOAD;
+    }
+    if (f & MachO::MH_PREBOUND) {
+      outs() << " PREBOUND";
+      f &= ~MachO::MH_PREBOUND;
+    }
+    if (f & MachO::MH_SPLIT_SEGS) {
+      outs() << " SPLIT_SEGS";
+      f &= ~MachO::MH_SPLIT_SEGS;
+    }
+    if (f & MachO::MH_LAZY_INIT) {
+      outs() << " LAZY_INIT";
+      f &= ~MachO::MH_LAZY_INIT;
+    }
+    if (f & MachO::MH_TWOLEVEL) {
+      outs() << " TWOLEVEL";
+      f &= ~MachO::MH_TWOLEVEL;
+    }
+    if (f & MachO::MH_FORCE_FLAT) {
+      outs() << " FORCE_FLAT";
+      f &= ~MachO::MH_FORCE_FLAT;
+    }
+    if (f & MachO::MH_NOMULTIDEFS) {
+      outs() << " NOMULTIDEFS";
+      f &= ~MachO::MH_NOMULTIDEFS;
+    }
+    if (f & MachO::MH_NOFIXPREBINDING) {
+      outs() << " NOFIXPREBINDING";
+      f &= ~MachO::MH_NOFIXPREBINDING;
+    }
+    if (f & MachO::MH_PREBINDABLE) {
+      outs() << " PREBINDABLE";
+      f &= ~MachO::MH_PREBINDABLE;
+    }
+    if (f & MachO::MH_ALLMODSBOUND) {
+      outs() << " ALLMODSBOUND";
+      f &= ~MachO::MH_ALLMODSBOUND;
+    }
+    if (f & MachO::MH_SUBSECTIONS_VIA_SYMBOLS) {
+      outs() << " SUBSECTIONS_VIA_SYMBOLS";
+      f &= ~MachO::MH_SUBSECTIONS_VIA_SYMBOLS;
+    }
+    if (f & MachO::MH_CANONICAL) {
+      outs() << " CANONICAL";
+      f &= ~MachO::MH_CANONICAL;
+    }
+    if (f & MachO::MH_WEAK_DEFINES) {
+      outs() << " WEAK_DEFINES";
+      f &= ~MachO::MH_WEAK_DEFINES;
+    }
+    if (f & MachO::MH_BINDS_TO_WEAK) {
+      outs() << " BINDS_TO_WEAK";
+      f &= ~MachO::MH_BINDS_TO_WEAK;
+    }
+    if (f & MachO::MH_ALLOW_STACK_EXECUTION) {
+      outs() << " ALLOW_STACK_EXECUTION";
+      f &= ~MachO::MH_ALLOW_STACK_EXECUTION;
+    }
+    if (f & MachO::MH_DEAD_STRIPPABLE_DYLIB) {
+      outs() << " DEAD_STRIPPABLE_DYLIB";
+      f &= ~MachO::MH_DEAD_STRIPPABLE_DYLIB;
+    }
+    if (f & MachO::MH_PIE) {
+      outs() << " PIE";
+      f &= ~MachO::MH_PIE;
+    }
+    if (f & MachO::MH_NO_REEXPORTED_DYLIBS) {
+      outs() << " NO_REEXPORTED_DYLIBS";
+      f &= ~MachO::MH_NO_REEXPORTED_DYLIBS;
+    }
+    if (f & MachO::MH_HAS_TLV_DESCRIPTORS) {
+      outs() << " MH_HAS_TLV_DESCRIPTORS";
+      f &= ~MachO::MH_HAS_TLV_DESCRIPTORS;
+    }
+    if (f & MachO::MH_NO_HEAP_EXECUTION) {
+      outs() << " MH_NO_HEAP_EXECUTION";
+      f &= ~MachO::MH_NO_HEAP_EXECUTION;
+    }
+    if (f & MachO::MH_APP_EXTENSION_SAFE) {
+      outs() << " APP_EXTENSION_SAFE";
+      f &= ~MachO::MH_APP_EXTENSION_SAFE;
+    }
+    if (f != 0 || flags == 0)
+      outs() << format(" 0x%08" PRIx32, f);
+  } else {
+    outs() << format(" 0x%08" PRIx32, magic);
+    outs() << format(" %7d", cputype);
+    outs() << format(" %10d", cpusubtype & ~MachO::CPU_SUBTYPE_MASK);
+    outs() << format("  0x%02" PRIx32,
+                     (cpusubtype & MachO::CPU_SUBTYPE_MASK) >> 24);
+    outs() << format("  %10u", filetype);
+    outs() << format(" %5u", ncmds);
+    outs() << format(" %10u", sizeofcmds);
+    outs() << format(" 0x%08" PRIx32, flags);
+  }
+  outs() << "\n";
+}
+
+static void PrintSegmentCommand(uint32_t cmd, uint32_t cmdsize,
+                                StringRef SegName, uint64_t vmaddr,
+                                uint64_t vmsize, uint64_t fileoff,
+                                uint64_t filesize, uint32_t maxprot,
+                                uint32_t initprot, uint32_t nsects,
+                                uint32_t flags, uint32_t object_size,
+                                bool verbose) {
+  uint64_t expected_cmdsize;
+  if (cmd == MachO::LC_SEGMENT) {
+    outs() << "      cmd LC_SEGMENT\n";
+    expected_cmdsize = nsects;
+    expected_cmdsize *= sizeof(struct MachO::section);
+    expected_cmdsize += sizeof(struct MachO::segment_command);
+  } else {
+    outs() << "      cmd LC_SEGMENT_64\n";
+    expected_cmdsize = nsects;
+    expected_cmdsize *= sizeof(struct MachO::section_64);
+    expected_cmdsize += sizeof(struct MachO::segment_command_64);
+  }
+  outs() << "  cmdsize " << cmdsize;
+  if (cmdsize != expected_cmdsize)
+    outs() << " Inconsistent size\n";
+  else
+    outs() << "\n";
+  outs() << "  segname " << SegName << "\n";
+  if (cmd == MachO::LC_SEGMENT_64) {
+    outs() << "   vmaddr " << format("0x%016" PRIx64, vmaddr) << "\n";
+    outs() << "   vmsize " << format("0x%016" PRIx64, vmsize) << "\n";
+  } else {
+    outs() << "   vmaddr " << format("0x%08" PRIx64, vmaddr) << "\n";
+    outs() << "   vmsize " << format("0x%08" PRIx64, vmsize) << "\n";
+  }
+  outs() << "  fileoff " << fileoff;
+  if (fileoff > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << " filesize " << filesize;
+  if (fileoff + filesize > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  if (verbose) {
+    if ((maxprot &
+         ~(MachO::VM_PROT_READ | MachO::VM_PROT_WRITE |
+           MachO::VM_PROT_EXECUTE)) != 0)
+      outs() << "  maxprot ?" << format("0x%08" PRIx32, maxprot) << "\n";
+    else {
+      if (maxprot & MachO::VM_PROT_READ)
+        outs() << "  maxprot r";
+      else
+        outs() << "  maxprot -";
+      if (maxprot & MachO::VM_PROT_WRITE)
+        outs() << "w";
+      else
+        outs() << "-";
+      if (maxprot & MachO::VM_PROT_EXECUTE)
+        outs() << "x\n";
+      else
+        outs() << "-\n";
+    }
+    if ((initprot &
+         ~(MachO::VM_PROT_READ | MachO::VM_PROT_WRITE |
+           MachO::VM_PROT_EXECUTE)) != 0)
+      outs() << "  initprot ?" << format("0x%08" PRIx32, initprot) << "\n";
+    else {
+      if (initprot & MachO::VM_PROT_READ)
+        outs() << " initprot r";
+      else
+        outs() << " initprot -";
+      if (initprot & MachO::VM_PROT_WRITE)
+        outs() << "w";
+      else
+        outs() << "-";
+      if (initprot & MachO::VM_PROT_EXECUTE)
+        outs() << "x\n";
+      else
+        outs() << "-\n";
+    }
+  } else {
+    outs() << "  maxprot " << format("0x%08" PRIx32, maxprot) << "\n";
+    outs() << " initprot " << format("0x%08" PRIx32, initprot) << "\n";
+  }
+  outs() << "   nsects " << nsects << "\n";
+  if (verbose) {
+    outs() << "    flags";
+    if (flags == 0)
+      outs() << " (none)\n";
+    else {
+      if (flags & MachO::SG_HIGHVM) {
+        outs() << " HIGHVM";
+        flags &= ~MachO::SG_HIGHVM;
+      }
+      if (flags & MachO::SG_FVMLIB) {
+        outs() << " FVMLIB";
+        flags &= ~MachO::SG_FVMLIB;
+      }
+      if (flags & MachO::SG_NORELOC) {
+        outs() << " NORELOC";
+        flags &= ~MachO::SG_NORELOC;
+      }
+      if (flags & MachO::SG_PROTECTED_VERSION_1) {
+        outs() << " PROTECTED_VERSION_1";
+        flags &= ~MachO::SG_PROTECTED_VERSION_1;
+      }
+      if (flags)
+        outs() << format(" 0x%08" PRIx32, flags) << " (unknown flags)\n";
+      else
+        outs() << "\n";
+    }
+  } else {
+    outs() << "    flags " << format("0x%" PRIx32, flags) << "\n";
+  }
+}
+
+static void PrintSection(const char *sectname, const char *segname,
+                         uint64_t addr, uint64_t size, uint32_t offset,
+                         uint32_t align, uint32_t reloff, uint32_t nreloc,
+                         uint32_t flags, uint32_t reserved1, uint32_t reserved2,
+                         uint32_t cmd, const char *sg_segname,
+                         uint32_t filetype, uint32_t object_size,
+                         bool verbose) {
+  outs() << "Section\n";
+  outs() << "  sectname " << format("%.16s\n", sectname);
+  outs() << "   segname " << format("%.16s", segname);
+  if (filetype != MachO::MH_OBJECT && strncmp(sg_segname, segname, 16) != 0)
+    outs() << " (does not match segment)\n";
+  else
+    outs() << "\n";
+  if (cmd == MachO::LC_SEGMENT_64) {
+    outs() << "      addr " << format("0x%016" PRIx64, addr) << "\n";
+    outs() << "      size " << format("0x%016" PRIx64, size);
+  } else {
+    outs() << "      addr " << format("0x%08" PRIx64, addr) << "\n";
+    outs() << "      size " << format("0x%08" PRIx64, size);
+  }
+  if ((flags & MachO::S_ZEROFILL) != 0 && offset + size > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << "    offset " << offset;
+  if (offset > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  uint32_t align_shifted = 1 << align;
+  outs() << "     align 2^" << align << " (" << align_shifted << ")\n";
+  outs() << "    reloff " << reloff;
+  if (reloff > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << "    nreloc " << nreloc;
+  if (reloff + nreloc * sizeof(struct MachO::relocation_info) > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  uint32_t section_type = flags & MachO::SECTION_TYPE;
+  if (verbose) {
+    outs() << "      type";
+    if (section_type == MachO::S_REGULAR)
+      outs() << " S_REGULAR\n";
+    else if (section_type == MachO::S_ZEROFILL)
+      outs() << " S_ZEROFILL\n";
+    else if (section_type == MachO::S_CSTRING_LITERALS)
+      outs() << " S_CSTRING_LITERALS\n";
+    else if (section_type == MachO::S_4BYTE_LITERALS)
+      outs() << " S_4BYTE_LITERALS\n";
+    else if (section_type == MachO::S_8BYTE_LITERALS)
+      outs() << " S_8BYTE_LITERALS\n";
+    else if (section_type == MachO::S_16BYTE_LITERALS)
+      outs() << " S_16BYTE_LITERALS\n";
+    else if (section_type == MachO::S_LITERAL_POINTERS)
+      outs() << " S_LITERAL_POINTERS\n";
+    else if (section_type == MachO::S_NON_LAZY_SYMBOL_POINTERS)
+      outs() << " S_NON_LAZY_SYMBOL_POINTERS\n";
+    else if (section_type == MachO::S_LAZY_SYMBOL_POINTERS)
+      outs() << " S_LAZY_SYMBOL_POINTERS\n";
+    else if (section_type == MachO::S_SYMBOL_STUBS)
+      outs() << " S_SYMBOL_STUBS\n";
+    else if (section_type == MachO::S_MOD_INIT_FUNC_POINTERS)
+      outs() << " S_MOD_INIT_FUNC_POINTERS\n";
+    else if (section_type == MachO::S_MOD_TERM_FUNC_POINTERS)
+      outs() << " S_MOD_TERM_FUNC_POINTERS\n";
+    else if (section_type == MachO::S_COALESCED)
+      outs() << " S_COALESCED\n";
+    else if (section_type == MachO::S_INTERPOSING)
+      outs() << " S_INTERPOSING\n";
+    else if (section_type == MachO::S_DTRACE_DOF)
+      outs() << " S_DTRACE_DOF\n";
+    else if (section_type == MachO::S_LAZY_DYLIB_SYMBOL_POINTERS)
+      outs() << " S_LAZY_DYLIB_SYMBOL_POINTERS\n";
+    else if (section_type == MachO::S_THREAD_LOCAL_REGULAR)
+      outs() << " S_THREAD_LOCAL_REGULAR\n";
+    else if (section_type == MachO::S_THREAD_LOCAL_ZEROFILL)
+      outs() << " S_THREAD_LOCAL_ZEROFILL\n";
+    else if (section_type == MachO::S_THREAD_LOCAL_VARIABLES)
+      outs() << " S_THREAD_LOCAL_VARIABLES\n";
+    else if (section_type == MachO::S_THREAD_LOCAL_VARIABLE_POINTERS)
+      outs() << " S_THREAD_LOCAL_VARIABLE_POINTERS\n";
+    else if (section_type == MachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS)
+      outs() << " S_THREAD_LOCAL_INIT_FUNCTION_POINTERS\n";
+    else
+      outs() << format("0x%08" PRIx32, section_type) << "\n";
+    outs() << "attributes";
+    uint32_t section_attributes = flags & MachO::SECTION_ATTRIBUTES;
+    if (section_attributes & MachO::S_ATTR_PURE_INSTRUCTIONS)
+      outs() << " PURE_INSTRUCTIONS";
+    if (section_attributes & MachO::S_ATTR_NO_TOC)
+      outs() << " NO_TOC";
+    if (section_attributes & MachO::S_ATTR_STRIP_STATIC_SYMS)
+      outs() << " STRIP_STATIC_SYMS";
+    if (section_attributes & MachO::S_ATTR_NO_DEAD_STRIP)
+      outs() << " NO_DEAD_STRIP";
+    if (section_attributes & MachO::S_ATTR_LIVE_SUPPORT)
+      outs() << " LIVE_SUPPORT";
+    if (section_attributes & MachO::S_ATTR_SELF_MODIFYING_CODE)
+      outs() << " SELF_MODIFYING_CODE";
+    if (section_attributes & MachO::S_ATTR_DEBUG)
+      outs() << " DEBUG";
+    if (section_attributes & MachO::S_ATTR_SOME_INSTRUCTIONS)
+      outs() << " SOME_INSTRUCTIONS";
+    if (section_attributes & MachO::S_ATTR_EXT_RELOC)
+      outs() << " EXT_RELOC";
+    if (section_attributes & MachO::S_ATTR_LOC_RELOC)
+      outs() << " LOC_RELOC";
+    if (section_attributes == 0)
+      outs() << " (none)";
+    outs() << "\n";
+  } else
+    outs() << "     flags " << format("0x%08" PRIx32, flags) << "\n";
+  outs() << " reserved1 " << reserved1;
+  if (section_type == MachO::S_SYMBOL_STUBS ||
+      section_type == MachO::S_LAZY_SYMBOL_POINTERS ||
+      section_type == MachO::S_LAZY_DYLIB_SYMBOL_POINTERS ||
+      section_type == MachO::S_NON_LAZY_SYMBOL_POINTERS ||
+      section_type == MachO::S_THREAD_LOCAL_VARIABLE_POINTERS)
+    outs() << " (index into indirect symbol table)\n";
+  else
+    outs() << "\n";
+  outs() << " reserved2 " << reserved2;
+  if (section_type == MachO::S_SYMBOL_STUBS)
+    outs() << " (size of stubs)\n";
+  else
+    outs() << "\n";
+}
+
+static void PrintSymtabLoadCommand(MachO::symtab_command st, bool Is64Bit,
+                                   uint32_t object_size) {
+  outs() << "     cmd LC_SYMTAB\n";
+  outs() << " cmdsize " << st.cmdsize;
+  if (st.cmdsize != sizeof(struct MachO::symtab_command))
+    outs() << " Incorrect size\n";
+  else
+    outs() << "\n";
+  outs() << "  symoff " << st.symoff;
+  if (st.symoff > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << "   nsyms " << st.nsyms;
+  uint64_t big_size;
+  if (Is64Bit) {
+    big_size = st.nsyms;
+    big_size *= sizeof(struct MachO::nlist_64);
+    big_size += st.symoff;
+    if (big_size > object_size)
+      outs() << " (past end of file)\n";
+    else
+      outs() << "\n";
+  } else {
+    big_size = st.nsyms;
+    big_size *= sizeof(struct MachO::nlist);
+    big_size += st.symoff;
+    if (big_size > object_size)
+      outs() << " (past end of file)\n";
+    else
+      outs() << "\n";
+  }
+  outs() << "  stroff " << st.stroff;
+  if (st.stroff > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << " strsize " << st.strsize;
+  big_size = st.stroff;
+  big_size += st.strsize;
+  if (big_size > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+}
+
+static void PrintDysymtabLoadCommand(MachO::dysymtab_command dyst,
+                                     uint32_t nsyms, uint32_t object_size,
+                                     bool Is64Bit) {
+  outs() << "            cmd LC_DYSYMTAB\n";
+  outs() << "        cmdsize " << dyst.cmdsize;
+  if (dyst.cmdsize != sizeof(struct MachO::dysymtab_command))
+    outs() << " Incorrect size\n";
+  else
+    outs() << "\n";
+  outs() << "      ilocalsym " << dyst.ilocalsym;
+  if (dyst.ilocalsym > nsyms)
+    outs() << " (greater than the number of symbols)\n";
+  else
+    outs() << "\n";
+  outs() << "      nlocalsym " << dyst.nlocalsym;
+  uint64_t big_size;
+  big_size = dyst.ilocalsym;
+  big_size += dyst.nlocalsym;
+  if (big_size > nsyms)
+    outs() << " (past the end of the symbol table)\n";
+  else
+    outs() << "\n";
+  outs() << "     iextdefsym " << dyst.iextdefsym;
+  if (dyst.iextdefsym > nsyms)
+    outs() << " (greater than the number of symbols)\n";
+  else
+    outs() << "\n";
+  outs() << "     nextdefsym " << dyst.nextdefsym;
+  big_size = dyst.iextdefsym;
+  big_size += dyst.nextdefsym;
+  if (big_size > nsyms)
+    outs() << " (past the end of the symbol table)\n";
+  else
+    outs() << "\n";
+  outs() << "      iundefsym " << dyst.iundefsym;
+  if (dyst.iundefsym > nsyms)
+    outs() << " (greater than the number of symbols)\n";
+  else
+    outs() << "\n";
+  outs() << "      nundefsym " << dyst.nundefsym;
+  big_size = dyst.iundefsym;
+  big_size += dyst.nundefsym;
+  if (big_size > nsyms)
+    outs() << " (past the end of the symbol table)\n";
+  else
+    outs() << "\n";
+  outs() << "         tocoff " << dyst.tocoff;
+  if (dyst.tocoff > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << "           ntoc " << dyst.ntoc;
+  big_size = dyst.ntoc;
+  big_size *= sizeof(struct MachO::dylib_table_of_contents);
+  big_size += dyst.tocoff;
+  if (big_size > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << "      modtaboff " << dyst.modtaboff;
+  if (dyst.modtaboff > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << "        nmodtab " << dyst.nmodtab;
+  uint64_t modtabend;
+  if (Is64Bit) {
+    modtabend = dyst.nmodtab;
+    modtabend *= sizeof(struct MachO::dylib_module_64);
+    modtabend += dyst.modtaboff;
+  } else {
+    modtabend = dyst.nmodtab;
+    modtabend *= sizeof(struct MachO::dylib_module);
+    modtabend += dyst.modtaboff;
+  }
+  if (modtabend > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << "   extrefsymoff " << dyst.extrefsymoff;
+  if (dyst.extrefsymoff > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << "    nextrefsyms " << dyst.nextrefsyms;
+  big_size = dyst.nextrefsyms;
+  big_size *= sizeof(struct MachO::dylib_reference);
+  big_size += dyst.extrefsymoff;
+  if (big_size > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << " indirectsymoff " << dyst.indirectsymoff;
+  if (dyst.indirectsymoff > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << "  nindirectsyms " << dyst.nindirectsyms;
+  big_size = dyst.nindirectsyms;
+  big_size *= sizeof(uint32_t);
+  big_size += dyst.indirectsymoff;
+  if (big_size > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << "      extreloff " << dyst.extreloff;
+  if (dyst.extreloff > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << "        nextrel " << dyst.nextrel;
+  big_size = dyst.nextrel;
+  big_size *= sizeof(struct MachO::relocation_info);
+  big_size += dyst.extreloff;
+  if (big_size > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << "      locreloff " << dyst.locreloff;
+  if (dyst.locreloff > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << "        nlocrel " << dyst.nlocrel;
+  big_size = dyst.nlocrel;
+  big_size *= sizeof(struct MachO::relocation_info);
+  big_size += dyst.locreloff;
+  if (big_size > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+}
+
+static void PrintDyldInfoLoadCommand(MachO::dyld_info_command dc,
+                                     uint32_t object_size) {
+  if (dc.cmd == MachO::LC_DYLD_INFO)
+    outs() << "            cmd LC_DYLD_INFO\n";
+  else
+    outs() << "            cmd LC_DYLD_INFO_ONLY\n";
+  outs() << "        cmdsize " << dc.cmdsize;
+  if (dc.cmdsize != sizeof(struct MachO::dyld_info_command))
+    outs() << " Incorrect size\n";
+  else
+    outs() << "\n";
+  outs() << "     rebase_off " << dc.rebase_off;
+  if (dc.rebase_off > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << "    rebase_size " << dc.rebase_size;
+  uint64_t big_size;
+  big_size = dc.rebase_off;
+  big_size += dc.rebase_size;
+  if (big_size > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << "       bind_off " << dc.bind_off;
+  if (dc.bind_off > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << "      bind_size " << dc.bind_size;
+  big_size = dc.bind_off;
+  big_size += dc.bind_size;
+  if (big_size > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << "  weak_bind_off " << dc.weak_bind_off;
+  if (dc.weak_bind_off > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << " weak_bind_size " << dc.weak_bind_size;
+  big_size = dc.weak_bind_off;
+  big_size += dc.weak_bind_size;
+  if (big_size > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << "  lazy_bind_off " << dc.lazy_bind_off;
+  if (dc.lazy_bind_off > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << " lazy_bind_size " << dc.lazy_bind_size;
+  big_size = dc.lazy_bind_off;
+  big_size += dc.lazy_bind_size;
+  if (big_size > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << "     export_off " << dc.export_off;
+  if (dc.export_off > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << "    export_size " << dc.export_size;
+  big_size = dc.export_off;
+  big_size += dc.export_size;
+  if (big_size > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+}
+
+static void PrintDyldLoadCommand(MachO::dylinker_command dyld,
+                                 const char *Ptr) {
+  if (dyld.cmd == MachO::LC_ID_DYLINKER)
+    outs() << "          cmd LC_ID_DYLINKER\n";
+  else if (dyld.cmd == MachO::LC_LOAD_DYLINKER)
+    outs() << "          cmd LC_LOAD_DYLINKER\n";
+  else if (dyld.cmd == MachO::LC_DYLD_ENVIRONMENT)
+    outs() << "          cmd LC_DYLD_ENVIRONMENT\n";
+  else
+    outs() << "          cmd ?(" << dyld.cmd << ")\n";
+  outs() << "      cmdsize " << dyld.cmdsize;
+  if (dyld.cmdsize < sizeof(struct MachO::dylinker_command))
+    outs() << " Incorrect size\n";
+  else
+    outs() << "\n";
+  if (dyld.name >= dyld.cmdsize)
+    outs() << "         name ?(bad offset " << dyld.name << ")\n";
+  else {
+    const char *P = (const char *)(Ptr) + dyld.name;
+    outs() << "         name " << P << " (offset " << dyld.name << ")\n";
+  }
+}
+
+static void PrintUuidLoadCommand(MachO::uuid_command uuid) {
+  outs() << "     cmd LC_UUID\n";
+  outs() << " cmdsize " << uuid.cmdsize;
+  if (uuid.cmdsize != sizeof(struct MachO::uuid_command))
+    outs() << " Incorrect size\n";
+  else
+    outs() << "\n";
+  outs() << "    uuid ";
+  outs() << format("%02" PRIX32, uuid.uuid[0]);
+  outs() << format("%02" PRIX32, uuid.uuid[1]);
+  outs() << format("%02" PRIX32, uuid.uuid[2]);
+  outs() << format("%02" PRIX32, uuid.uuid[3]);
+  outs() << "-";
+  outs() << format("%02" PRIX32, uuid.uuid[4]);
+  outs() << format("%02" PRIX32, uuid.uuid[5]);
+  outs() << "-";
+  outs() << format("%02" PRIX32, uuid.uuid[6]);
+  outs() << format("%02" PRIX32, uuid.uuid[7]);
+  outs() << "-";
+  outs() << format("%02" PRIX32, uuid.uuid[8]);
+  outs() << format("%02" PRIX32, uuid.uuid[9]);
+  outs() << "-";
+  outs() << format("%02" PRIX32, uuid.uuid[10]);
+  outs() << format("%02" PRIX32, uuid.uuid[11]);
+  outs() << format("%02" PRIX32, uuid.uuid[12]);
+  outs() << format("%02" PRIX32, uuid.uuid[13]);
+  outs() << format("%02" PRIX32, uuid.uuid[14]);
+  outs() << format("%02" PRIX32, uuid.uuid[15]);
+  outs() << "\n";
+}
+
+static void PrintRpathLoadCommand(MachO::rpath_command rpath, const char *Ptr) {
+  outs() << "          cmd LC_RPATH\n";
+  outs() << "      cmdsize " << rpath.cmdsize;
+  if (rpath.cmdsize < sizeof(struct MachO::rpath_command))
+    outs() << " Incorrect size\n";
+  else
+    outs() << "\n";
+  if (rpath.path >= rpath.cmdsize)
+    outs() << "         path ?(bad offset " << rpath.path << ")\n";
+  else {
+    const char *P = (const char *)(Ptr) + rpath.path;
+    outs() << "         path " << P << " (offset " << rpath.path << ")\n";
+  }
+}
+
+static void PrintVersionMinLoadCommand(MachO::version_min_command vd) {
+  if (vd.cmd == MachO::LC_VERSION_MIN_MACOSX)
+    outs() << "      cmd LC_VERSION_MIN_MACOSX\n";
+  else if (vd.cmd == MachO::LC_VERSION_MIN_IPHONEOS)
+    outs() << "      cmd LC_VERSION_MIN_IPHONEOS\n";
+  else
+    outs() << "      cmd " << vd.cmd << " (?)\n";
+  outs() << "  cmdsize " << vd.cmdsize;
+  if (vd.cmdsize != sizeof(struct MachO::version_min_command))
+    outs() << " Incorrect size\n";
+  else
+    outs() << "\n";
+  outs() << "  version " << ((vd.version >> 16) & 0xffff) << "."
+         << ((vd.version >> 8) & 0xff);
+  if ((vd.version & 0xff) != 0)
+    outs() << "." << (vd.version & 0xff);
+  outs() << "\n";
+  if (vd.sdk == 0)
+    outs() << "      sdk n/a";
+  else {
+    outs() << "      sdk " << ((vd.sdk >> 16) & 0xffff) << "."
+           << ((vd.sdk >> 8) & 0xff);
+  }
+  if ((vd.sdk & 0xff) != 0)
+    outs() << "." << (vd.sdk & 0xff);
+  outs() << "\n";
+}
+
+static void PrintSourceVersionCommand(MachO::source_version_command sd) {
+  outs() << "      cmd LC_SOURCE_VERSION\n";
+  outs() << "  cmdsize " << sd.cmdsize;
+  if (sd.cmdsize != sizeof(struct MachO::source_version_command))
+    outs() << " Incorrect size\n";
+  else
+    outs() << "\n";
+  uint64_t a = (sd.version >> 40) & 0xffffff;
+  uint64_t b = (sd.version >> 30) & 0x3ff;
+  uint64_t c = (sd.version >> 20) & 0x3ff;
+  uint64_t d = (sd.version >> 10) & 0x3ff;
+  uint64_t e = sd.version & 0x3ff;
+  outs() << "  version " << a << "." << b;
+  if (e != 0)
+    outs() << "." << c << "." << d << "." << e;
+  else if (d != 0)
+    outs() << "." << c << "." << d;
+  else if (c != 0)
+    outs() << "." << c;
+  outs() << "\n";
+}
+
+static void PrintEntryPointCommand(MachO::entry_point_command ep) {
+  outs() << "       cmd LC_MAIN\n";
+  outs() << "   cmdsize " << ep.cmdsize;
+  if (ep.cmdsize != sizeof(struct MachO::entry_point_command))
+    outs() << " Incorrect size\n";
+  else
+    outs() << "\n";
+  outs() << "  entryoff " << ep.entryoff << "\n";
+  outs() << " stacksize " << ep.stacksize << "\n";
+}
+
+static void PrintEncryptionInfoCommand(MachO::encryption_info_command ec,
+                                       uint32_t object_size) {
+  outs() << "          cmd LC_ENCRYPTION_INFO\n";
+  outs() << "      cmdsize " << ec.cmdsize;
+  if (ec.cmdsize != sizeof(struct MachO::encryption_info_command))
+    outs() << " Incorrect size\n";
+  else
+    outs() << "\n";
+  outs() << "     cryptoff " << ec.cryptoff;
+  if (ec.cryptoff > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << "    cryptsize " << ec.cryptsize;
+  if (ec.cryptsize > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << "      cryptid " << ec.cryptid << "\n";
+}
+
+static void PrintEncryptionInfoCommand64(MachO::encryption_info_command_64 ec,
+                                         uint32_t object_size) {
+  outs() << "          cmd LC_ENCRYPTION_INFO_64\n";
+  outs() << "      cmdsize " << ec.cmdsize;
+  if (ec.cmdsize != sizeof(struct MachO::encryption_info_command_64))
+    outs() << " Incorrect size\n";
+  else
+    outs() << "\n";
+  outs() << "     cryptoff " << ec.cryptoff;
+  if (ec.cryptoff > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << "    cryptsize " << ec.cryptsize;
+  if (ec.cryptsize > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << "      cryptid " << ec.cryptid << "\n";
+  outs() << "          pad " << ec.pad << "\n";
+}
+
+static void PrintLinkerOptionCommand(MachO::linker_option_command lo,
+                                     const char *Ptr) {
+  outs() << "     cmd LC_LINKER_OPTION\n";
+  outs() << " cmdsize " << lo.cmdsize;
+  if (lo.cmdsize < sizeof(struct MachO::linker_option_command))
+    outs() << " Incorrect size\n";
+  else
+    outs() << "\n";
+  outs() << "   count " << lo.count << "\n";
+  const char *string = Ptr + sizeof(struct MachO::linker_option_command);
+  uint32_t left = lo.cmdsize - sizeof(struct MachO::linker_option_command);
+  uint32_t i = 0;
+  while (left > 0) {
+    while (*string == '\0' && left > 0) {
+      string++;
+      left--;
+    }
+    if (left > 0) {
+      i++;
+      outs() << "  string #" << i << " " << format("%.*s\n", left, string);
+      uint32_t NullPos = StringRef(string, left).find('\0');
+      uint32_t len = std::min(NullPos, left) + 1;
+      string += len;
+      left -= len;
+    }
+  }
+  if (lo.count != i)
+    outs() << "   count " << lo.count << " does not match number of strings "
+           << i << "\n";
+}
+
+static void PrintSubFrameworkCommand(MachO::sub_framework_command sub,
+                                     const char *Ptr) {
+  outs() << "          cmd LC_SUB_FRAMEWORK\n";
+  outs() << "      cmdsize " << sub.cmdsize;
+  if (sub.cmdsize < sizeof(struct MachO::sub_framework_command))
+    outs() << " Incorrect size\n";
+  else
+    outs() << "\n";
+  if (sub.umbrella < sub.cmdsize) {
+    const char *P = Ptr + sub.umbrella;
+    outs() << "     umbrella " << P << " (offset " << sub.umbrella << ")\n";
+  } else {
+    outs() << "     umbrella ?(bad offset " << sub.umbrella << ")\n";
+  }
+}
+
+static void PrintSubUmbrellaCommand(MachO::sub_umbrella_command sub,
+                                    const char *Ptr) {
+  outs() << "          cmd LC_SUB_UMBRELLA\n";
+  outs() << "      cmdsize " << sub.cmdsize;
+  if (sub.cmdsize < sizeof(struct MachO::sub_umbrella_command))
+    outs() << " Incorrect size\n";
+  else
+    outs() << "\n";
+  if (sub.sub_umbrella < sub.cmdsize) {
+    const char *P = Ptr + sub.sub_umbrella;
+    outs() << " sub_umbrella " << P << " (offset " << sub.sub_umbrella << ")\n";
+  } else {
+    outs() << " sub_umbrella ?(bad offset " << sub.sub_umbrella << ")\n";
+  }
+}
+
+static void PrintSubLibraryCommand(MachO::sub_library_command sub,
+                                   const char *Ptr) {
+  outs() << "          cmd LC_SUB_LIBRARY\n";
+  outs() << "      cmdsize " << sub.cmdsize;
+  if (sub.cmdsize < sizeof(struct MachO::sub_library_command))
+    outs() << " Incorrect size\n";
+  else
+    outs() << "\n";
+  if (sub.sub_library < sub.cmdsize) {
+    const char *P = Ptr + sub.sub_library;
+    outs() << "  sub_library " << P << " (offset " << sub.sub_library << ")\n";
+  } else {
+    outs() << "  sub_library ?(bad offset " << sub.sub_library << ")\n";
+  }
+}
+
+static void PrintSubClientCommand(MachO::sub_client_command sub,
+                                  const char *Ptr) {
+  outs() << "          cmd LC_SUB_CLIENT\n";
+  outs() << "      cmdsize " << sub.cmdsize;
+  if (sub.cmdsize < sizeof(struct MachO::sub_client_command))
+    outs() << " Incorrect size\n";
+  else
+    outs() << "\n";
+  if (sub.client < sub.cmdsize) {
+    const char *P = Ptr + sub.client;
+    outs() << "       client " << P << " (offset " << sub.client << ")\n";
+  } else {
+    outs() << "       client ?(bad offset " << sub.client << ")\n";
+  }
+}
+
+static void PrintRoutinesCommand(MachO::routines_command r) {
+  outs() << "          cmd LC_ROUTINES\n";
+  outs() << "      cmdsize " << r.cmdsize;
+  if (r.cmdsize != sizeof(struct MachO::routines_command))
+    outs() << " Incorrect size\n";
+  else
+    outs() << "\n";
+  outs() << " init_address " << format("0x%08" PRIx32, r.init_address) << "\n";
+  outs() << "  init_module " << r.init_module << "\n";
+  outs() << "    reserved1 " << r.reserved1 << "\n";
+  outs() << "    reserved2 " << r.reserved2 << "\n";
+  outs() << "    reserved3 " << r.reserved3 << "\n";
+  outs() << "    reserved4 " << r.reserved4 << "\n";
+  outs() << "    reserved5 " << r.reserved5 << "\n";
+  outs() << "    reserved6 " << r.reserved6 << "\n";
+}
+
+static void PrintRoutinesCommand64(MachO::routines_command_64 r) {
+  outs() << "          cmd LC_ROUTINES_64\n";
+  outs() << "      cmdsize " << r.cmdsize;
+  if (r.cmdsize != sizeof(struct MachO::routines_command_64))
+    outs() << " Incorrect size\n";
+  else
+    outs() << "\n";
+  outs() << " init_address " << format("0x%016" PRIx64, r.init_address) << "\n";
+  outs() << "  init_module " << r.init_module << "\n";
+  outs() << "    reserved1 " << r.reserved1 << "\n";
+  outs() << "    reserved2 " << r.reserved2 << "\n";
+  outs() << "    reserved3 " << r.reserved3 << "\n";
+  outs() << "    reserved4 " << r.reserved4 << "\n";
+  outs() << "    reserved5 " << r.reserved5 << "\n";
+  outs() << "    reserved6 " << r.reserved6 << "\n";
+}
+
+static void Print_x86_thread_state64_t(MachO::x86_thread_state64_t &cpu64) {
+  outs() << "   rax  " << format("0x%016" PRIx64, cpu64.rax);
+  outs() << " rbx " << format("0x%016" PRIx64, cpu64.rbx);
+  outs() << " rcx  " << format("0x%016" PRIx64, cpu64.rcx) << "\n";
+  outs() << "   rdx  " << format("0x%016" PRIx64, cpu64.rdx);
+  outs() << " rdi " << format("0x%016" PRIx64, cpu64.rdi);
+  outs() << " rsi  " << format("0x%016" PRIx64, cpu64.rsi) << "\n";
+  outs() << "   rbp  " << format("0x%016" PRIx64, cpu64.rbp);
+  outs() << " rsp " << format("0x%016" PRIx64, cpu64.rsp);
+  outs() << " r8   " << format("0x%016" PRIx64, cpu64.r8) << "\n";
+  outs() << "    r9  " << format("0x%016" PRIx64, cpu64.r9);
+  outs() << " r10 " << format("0x%016" PRIx64, cpu64.r10);
+  outs() << " r11  " << format("0x%016" PRIx64, cpu64.r11) << "\n";
+  outs() << "   r12  " << format("0x%016" PRIx64, cpu64.r12);
+  outs() << " r13 " << format("0x%016" PRIx64, cpu64.r13);
+  outs() << " r14  " << format("0x%016" PRIx64, cpu64.r14) << "\n";
+  outs() << "   r15  " << format("0x%016" PRIx64, cpu64.r15);
+  outs() << " rip " << format("0x%016" PRIx64, cpu64.rip) << "\n";
+  outs() << "rflags  " << format("0x%016" PRIx64, cpu64.rflags);
+  outs() << " cs  " << format("0x%016" PRIx64, cpu64.cs);
+  outs() << " fs   " << format("0x%016" PRIx64, cpu64.fs) << "\n";
+  outs() << "    gs  " << format("0x%016" PRIx64, cpu64.gs) << "\n";
+}
+
+static void Print_mmst_reg(MachO::mmst_reg_t &r) {
+  uint32_t f;
+  outs() << "\t      mmst_reg  ";
+  for (f = 0; f < 10; f++)
+    outs() << format("%02" PRIx32, (r.mmst_reg[f] & 0xff)) << " ";
+  outs() << "\n";
+  outs() << "\t      mmst_rsrv ";
+  for (f = 0; f < 6; f++)
+    outs() << format("%02" PRIx32, (r.mmst_rsrv[f] & 0xff)) << " ";
+  outs() << "\n";
+}
+
+static void Print_xmm_reg(MachO::xmm_reg_t &r) {
+  uint32_t f;
+  outs() << "\t      xmm_reg ";
+  for (f = 0; f < 16; f++)
+    outs() << format("%02" PRIx32, (r.xmm_reg[f] & 0xff)) << " ";
+  outs() << "\n";
+}
+
+static void Print_x86_float_state_t(MachO::x86_float_state64_t &fpu) {
+  outs() << "\t    fpu_reserved[0] " << fpu.fpu_reserved[0];
+  outs() << " fpu_reserved[1] " << fpu.fpu_reserved[1] << "\n";
+  outs() << "\t    control: invalid " << fpu.fpu_fcw.invalid;
+  outs() << " denorm " << fpu.fpu_fcw.denorm;
+  outs() << " zdiv " << fpu.fpu_fcw.zdiv;
+  outs() << " ovrfl " << fpu.fpu_fcw.ovrfl;
+  outs() << " undfl " << fpu.fpu_fcw.undfl;
+  outs() << " precis " << fpu.fpu_fcw.precis << "\n";
+  outs() << "\t\t     pc ";
+  if (fpu.fpu_fcw.pc == MachO::x86_FP_PREC_24B)
+    outs() << "FP_PREC_24B ";
+  else if (fpu.fpu_fcw.pc == MachO::x86_FP_PREC_53B)
+    outs() << "FP_PREC_53B ";
+  else if (fpu.fpu_fcw.pc == MachO::x86_FP_PREC_64B)
+    outs() << "FP_PREC_64B ";
+  else
+    outs() << fpu.fpu_fcw.pc << " ";
+  outs() << "rc ";
+  if (fpu.fpu_fcw.rc == MachO::x86_FP_RND_NEAR)
+    outs() << "FP_RND_NEAR ";
+  else if (fpu.fpu_fcw.rc == MachO::x86_FP_RND_DOWN)
+    outs() << "FP_RND_DOWN ";
+  else if (fpu.fpu_fcw.rc == MachO::x86_FP_RND_UP)
+    outs() << "FP_RND_UP ";
+  else if (fpu.fpu_fcw.rc == MachO::x86_FP_CHOP)
+    outs() << "FP_CHOP ";
+  outs() << "\n";
+  outs() << "\t    status: invalid " << fpu.fpu_fsw.invalid;
+  outs() << " denorm " << fpu.fpu_fsw.denorm;
+  outs() << " zdiv " << fpu.fpu_fsw.zdiv;
+  outs() << " ovrfl " << fpu.fpu_fsw.ovrfl;
+  outs() << " undfl " << fpu.fpu_fsw.undfl;
+  outs() << " precis " << fpu.fpu_fsw.precis;
+  outs() << " stkflt " << fpu.fpu_fsw.stkflt << "\n";
+  outs() << "\t            errsumm " << fpu.fpu_fsw.errsumm;
+  outs() << " c0 " << fpu.fpu_fsw.c0;
+  outs() << " c1 " << fpu.fpu_fsw.c1;
+  outs() << " c2 " << fpu.fpu_fsw.c2;
+  outs() << " tos " << fpu.fpu_fsw.tos;
+  outs() << " c3 " << fpu.fpu_fsw.c3;
+  outs() << " busy " << fpu.fpu_fsw.busy << "\n";
+  outs() << "\t    fpu_ftw " << format("0x%02" PRIx32, fpu.fpu_ftw);
+  outs() << " fpu_rsrv1 " << format("0x%02" PRIx32, fpu.fpu_rsrv1);
+  outs() << " fpu_fop " << format("0x%04" PRIx32, fpu.fpu_fop);
+  outs() << " fpu_ip " << format("0x%08" PRIx32, fpu.fpu_ip) << "\n";
+  outs() << "\t    fpu_cs " << format("0x%04" PRIx32, fpu.fpu_cs);
+  outs() << " fpu_rsrv2 " << format("0x%04" PRIx32, fpu.fpu_rsrv2);
+  outs() << " fpu_dp " << format("0x%08" PRIx32, fpu.fpu_dp);
+  outs() << " fpu_ds " << format("0x%04" PRIx32, fpu.fpu_ds) << "\n";
+  outs() << "\t    fpu_rsrv3 " << format("0x%04" PRIx32, fpu.fpu_rsrv3);
+  outs() << " fpu_mxcsr " << format("0x%08" PRIx32, fpu.fpu_mxcsr);
+  outs() << " fpu_mxcsrmask " << format("0x%08" PRIx32, fpu.fpu_mxcsrmask);
+  outs() << "\n";
+  outs() << "\t    fpu_stmm0:\n";
+  Print_mmst_reg(fpu.fpu_stmm0);
+  outs() << "\t    fpu_stmm1:\n";
+  Print_mmst_reg(fpu.fpu_stmm1);
+  outs() << "\t    fpu_stmm2:\n";
+  Print_mmst_reg(fpu.fpu_stmm2);
+  outs() << "\t    fpu_stmm3:\n";
+  Print_mmst_reg(fpu.fpu_stmm3);
+  outs() << "\t    fpu_stmm4:\n";
+  Print_mmst_reg(fpu.fpu_stmm4);
+  outs() << "\t    fpu_stmm5:\n";
+  Print_mmst_reg(fpu.fpu_stmm5);
+  outs() << "\t    fpu_stmm6:\n";
+  Print_mmst_reg(fpu.fpu_stmm6);
+  outs() << "\t    fpu_stmm7:\n";
+  Print_mmst_reg(fpu.fpu_stmm7);
+  outs() << "\t    fpu_xmm0:\n";
+  Print_xmm_reg(fpu.fpu_xmm0);
+  outs() << "\t    fpu_xmm1:\n";
+  Print_xmm_reg(fpu.fpu_xmm1);
+  outs() << "\t    fpu_xmm2:\n";
+  Print_xmm_reg(fpu.fpu_xmm2);
+  outs() << "\t    fpu_xmm3:\n";
+  Print_xmm_reg(fpu.fpu_xmm3);
+  outs() << "\t    fpu_xmm4:\n";
+  Print_xmm_reg(fpu.fpu_xmm4);
+  outs() << "\t    fpu_xmm5:\n";
+  Print_xmm_reg(fpu.fpu_xmm5);
+  outs() << "\t    fpu_xmm6:\n";
+  Print_xmm_reg(fpu.fpu_xmm6);
+  outs() << "\t    fpu_xmm7:\n";
+  Print_xmm_reg(fpu.fpu_xmm7);
+  outs() << "\t    fpu_xmm8:\n";
+  Print_xmm_reg(fpu.fpu_xmm8);
+  outs() << "\t    fpu_xmm9:\n";
+  Print_xmm_reg(fpu.fpu_xmm9);
+  outs() << "\t    fpu_xmm10:\n";
+  Print_xmm_reg(fpu.fpu_xmm10);
+  outs() << "\t    fpu_xmm11:\n";
+  Print_xmm_reg(fpu.fpu_xmm11);
+  outs() << "\t    fpu_xmm12:\n";
+  Print_xmm_reg(fpu.fpu_xmm12);
+  outs() << "\t    fpu_xmm13:\n";
+  Print_xmm_reg(fpu.fpu_xmm13);
+  outs() << "\t    fpu_xmm14:\n";
+  Print_xmm_reg(fpu.fpu_xmm14);
+  outs() << "\t    fpu_xmm15:\n";
+  Print_xmm_reg(fpu.fpu_xmm15);
+  outs() << "\t    fpu_rsrv4:\n";
+  for (uint32_t f = 0; f < 6; f++) {
+    outs() << "\t            ";
+    for (uint32_t g = 0; g < 16; g++)
+      outs() << format("%02" PRIx32, fpu.fpu_rsrv4[f * g]) << " ";
+    outs() << "\n";
+  }
+  outs() << "\t    fpu_reserved1 " << format("0x%08" PRIx32, fpu.fpu_reserved1);
+  outs() << "\n";
+}
+
+static void Print_x86_exception_state_t(MachO::x86_exception_state64_t &exc64) {
+  outs() << "\t    trapno " << format("0x%08" PRIx32, exc64.trapno);
+  outs() << " err " << format("0x%08" PRIx32, exc64.err);
+  outs() << " faultvaddr " << format("0x%016" PRIx64, exc64.faultvaddr) << "\n";
+}
+
+static void PrintThreadCommand(MachO::thread_command t, const char *Ptr,
+                               bool isLittleEndian, uint32_t cputype) {
+  if (t.cmd == MachO::LC_THREAD)
+    outs() << "        cmd LC_THREAD\n";
+  else if (t.cmd == MachO::LC_UNIXTHREAD)
+    outs() << "        cmd LC_UNIXTHREAD\n";
+  else
+    outs() << "        cmd " << t.cmd << " (unknown)\n";
+  outs() << "    cmdsize " << t.cmdsize;
+  if (t.cmdsize < sizeof(struct MachO::thread_command) + 2 * sizeof(uint32_t))
+    outs() << " Incorrect size\n";
+  else
+    outs() << "\n";
+
+  const char *begin = Ptr + sizeof(struct MachO::thread_command);
+  const char *end = Ptr + t.cmdsize;
+  uint32_t flavor, count, left;
+  if (cputype == MachO::CPU_TYPE_X86_64) {
+    while (begin < end) {
+      if (end - begin > (ptrdiff_t)sizeof(uint32_t)) {
+        memcpy((char *)&flavor, begin, sizeof(uint32_t));
+        begin += sizeof(uint32_t);
+      } else {
+        flavor = 0;
+        begin = end;
+      }
+      if (isLittleEndian != sys::IsLittleEndianHost)
+        sys::swapByteOrder(flavor);
+      if (end - begin > (ptrdiff_t)sizeof(uint32_t)) {
+        memcpy((char *)&count, begin, sizeof(uint32_t));
+        begin += sizeof(uint32_t);
+      } else {
+        count = 0;
+        begin = end;
+      }
+      if (isLittleEndian != sys::IsLittleEndianHost)
+        sys::swapByteOrder(count);
+      if (flavor == MachO::x86_THREAD_STATE64) {
+        outs() << "     flavor x86_THREAD_STATE64\n";
+        if (count == MachO::x86_THREAD_STATE64_COUNT)
+          outs() << "      count x86_THREAD_STATE64_COUNT\n";
+        else
+          outs() << "      count " << count
+                 << " (not x86_THREAD_STATE64_COUNT)\n";
+        MachO::x86_thread_state64_t cpu64;
+        left = end - begin;
+        if (left >= sizeof(MachO::x86_thread_state64_t)) {
+          memcpy(&cpu64, begin, sizeof(MachO::x86_thread_state64_t));
+          begin += sizeof(MachO::x86_thread_state64_t);
+        } else {
+          memset(&cpu64, '\0', sizeof(MachO::x86_thread_state64_t));
+          memcpy(&cpu64, begin, left);
+          begin += left;
+        }
+        if (isLittleEndian != sys::IsLittleEndianHost)
+          swapStruct(cpu64);
+        Print_x86_thread_state64_t(cpu64);
+      } else if (flavor == MachO::x86_THREAD_STATE) {
+        outs() << "     flavor x86_THREAD_STATE\n";
+        if (count == MachO::x86_THREAD_STATE_COUNT)
+          outs() << "      count x86_THREAD_STATE_COUNT\n";
+        else
+          outs() << "      count " << count
+                 << " (not x86_THREAD_STATE_COUNT)\n";
+        struct MachO::x86_thread_state_t ts;
+        left = end - begin;
+        if (left >= sizeof(MachO::x86_thread_state_t)) {
+          memcpy(&ts, begin, sizeof(MachO::x86_thread_state_t));
+          begin += sizeof(MachO::x86_thread_state_t);
+        } else {
+          memset(&ts, '\0', sizeof(MachO::x86_thread_state_t));
+          memcpy(&ts, begin, left);
+          begin += left;
+        }
+        if (isLittleEndian != sys::IsLittleEndianHost)
+          swapStruct(ts);
+        if (ts.tsh.flavor == MachO::x86_THREAD_STATE64) {
+          outs() << "\t    tsh.flavor x86_THREAD_STATE64 ";
+          if (ts.tsh.count == MachO::x86_THREAD_STATE64_COUNT)
+            outs() << "tsh.count x86_THREAD_STATE64_COUNT\n";
+          else
+            outs() << "tsh.count " << ts.tsh.count
+                   << " (not x86_THREAD_STATE64_COUNT\n";
+          Print_x86_thread_state64_t(ts.uts.ts64);
+        } else {
+          outs() << "\t    tsh.flavor " << ts.tsh.flavor << "  tsh.count "
+                 << ts.tsh.count << "\n";
+        }
+      } else if (flavor == MachO::x86_FLOAT_STATE) {
+        outs() << "     flavor x86_FLOAT_STATE\n";
+        if (count == MachO::x86_FLOAT_STATE_COUNT)
+          outs() << "      count x86_FLOAT_STATE_COUNT\n";
+        else
+          outs() << "      count " << count << " (not x86_FLOAT_STATE_COUNT)\n";
+        struct MachO::x86_float_state_t fs;
+        left = end - begin;
+        if (left >= sizeof(MachO::x86_float_state_t)) {
+          memcpy(&fs, begin, sizeof(MachO::x86_float_state_t));
+          begin += sizeof(MachO::x86_float_state_t);
+        } else {
+          memset(&fs, '\0', sizeof(MachO::x86_float_state_t));
+          memcpy(&fs, begin, left);
+          begin += left;
+        }
+        if (isLittleEndian != sys::IsLittleEndianHost)
+          swapStruct(fs);
+        if (fs.fsh.flavor == MachO::x86_FLOAT_STATE64) {
+          outs() << "\t    fsh.flavor x86_FLOAT_STATE64 ";
+          if (fs.fsh.count == MachO::x86_FLOAT_STATE64_COUNT)
+            outs() << "fsh.count x86_FLOAT_STATE64_COUNT\n";
+          else
+            outs() << "fsh.count " << fs.fsh.count
+                   << " (not x86_FLOAT_STATE64_COUNT\n";
+          Print_x86_float_state_t(fs.ufs.fs64);
+        } else {
+          outs() << "\t    fsh.flavor " << fs.fsh.flavor << "  fsh.count "
+                 << fs.fsh.count << "\n";
+        }
+      } else if (flavor == MachO::x86_EXCEPTION_STATE) {
+        outs() << "     flavor x86_EXCEPTION_STATE\n";
+        if (count == MachO::x86_EXCEPTION_STATE_COUNT)
+          outs() << "      count x86_EXCEPTION_STATE_COUNT\n";
+        else
+          outs() << "      count " << count
+                 << " (not x86_EXCEPTION_STATE_COUNT)\n";
+        struct MachO::x86_exception_state_t es;
+        left = end - begin;
+        if (left >= sizeof(MachO::x86_exception_state_t)) {
+          memcpy(&es, begin, sizeof(MachO::x86_exception_state_t));
+          begin += sizeof(MachO::x86_exception_state_t);
+        } else {
+          memset(&es, '\0', sizeof(MachO::x86_exception_state_t));
+          memcpy(&es, begin, left);
+          begin += left;
+        }
+        if (isLittleEndian != sys::IsLittleEndianHost)
+          swapStruct(es);
+        if (es.esh.flavor == MachO::x86_EXCEPTION_STATE64) {
+          outs() << "\t    esh.flavor x86_EXCEPTION_STATE64\n";
+          if (es.esh.count == MachO::x86_EXCEPTION_STATE64_COUNT)
+            outs() << "\t    esh.count x86_EXCEPTION_STATE64_COUNT\n";
+          else
+            outs() << "\t    esh.count " << es.esh.count
+                   << " (not x86_EXCEPTION_STATE64_COUNT\n";
+          Print_x86_exception_state_t(es.ues.es64);
+        } else {
+          outs() << "\t    esh.flavor " << es.esh.flavor << "  esh.count "
+                 << es.esh.count << "\n";
+        }
+      } else {
+        outs() << "     flavor " << flavor << " (unknown)\n";
+        outs() << "      count " << count << "\n";
+        outs() << "      state (unknown)\n";
+        begin += count * sizeof(uint32_t);
+      }
+    }
+  } else {
+    while (begin < end) {
+      if (end - begin > (ptrdiff_t)sizeof(uint32_t)) {
+        memcpy((char *)&flavor, begin, sizeof(uint32_t));
+        begin += sizeof(uint32_t);
+      } else {
+        flavor = 0;
+        begin = end;
+      }
+      if (isLittleEndian != sys::IsLittleEndianHost)
+        sys::swapByteOrder(flavor);
+      if (end - begin > (ptrdiff_t)sizeof(uint32_t)) {
+        memcpy((char *)&count, begin, sizeof(uint32_t));
+        begin += sizeof(uint32_t);
+      } else {
+        count = 0;
+        begin = end;
+      }
+      if (isLittleEndian != sys::IsLittleEndianHost)
+        sys::swapByteOrder(count);
+      outs() << "     flavor " << flavor << "\n";
+      outs() << "      count " << count << "\n";
+      outs() << "      state (Unknown cputype/cpusubtype)\n";
+      begin += count * sizeof(uint32_t);
+    }
+  }
+}
+
+static void PrintDylibCommand(MachO::dylib_command dl, const char *Ptr) {
+  if (dl.cmd == MachO::LC_ID_DYLIB)
+    outs() << "          cmd LC_ID_DYLIB\n";
+  else if (dl.cmd == MachO::LC_LOAD_DYLIB)
+    outs() << "          cmd LC_LOAD_DYLIB\n";
+  else if (dl.cmd == MachO::LC_LOAD_WEAK_DYLIB)
+    outs() << "          cmd LC_LOAD_WEAK_DYLIB\n";
+  else if (dl.cmd == MachO::LC_REEXPORT_DYLIB)
+    outs() << "          cmd LC_REEXPORT_DYLIB\n";
+  else if (dl.cmd == MachO::LC_LAZY_LOAD_DYLIB)
+    outs() << "          cmd LC_LAZY_LOAD_DYLIB\n";
+  else if (dl.cmd == MachO::LC_LOAD_UPWARD_DYLIB)
+    outs() << "          cmd LC_LOAD_UPWARD_DYLIB\n";
+  else
+    outs() << "          cmd " << dl.cmd << " (unknown)\n";
+  outs() << "      cmdsize " << dl.cmdsize;
+  if (dl.cmdsize < sizeof(struct MachO::dylib_command))
+    outs() << " Incorrect size\n";
+  else
+    outs() << "\n";
+  if (dl.dylib.name < dl.cmdsize) {
+    const char *P = (const char *)(Ptr) + dl.dylib.name;
+    outs() << "         name " << P << " (offset " << dl.dylib.name << ")\n";
+  } else {
+    outs() << "         name ?(bad offset " << dl.dylib.name << ")\n";
+  }
+  outs() << "   time stamp " << dl.dylib.timestamp << " ";
+  time_t t = dl.dylib.timestamp;
+  outs() << ctime(&t);
+  outs() << "      current version ";
+  if (dl.dylib.current_version == 0xffffffff)
+    outs() << "n/a\n";
+  else
+    outs() << ((dl.dylib.current_version >> 16) & 0xffff) << "."
+           << ((dl.dylib.current_version >> 8) & 0xff) << "."
+           << (dl.dylib.current_version & 0xff) << "\n";
+  outs() << "compatibility version ";
+  if (dl.dylib.compatibility_version == 0xffffffff)
+    outs() << "n/a\n";
+  else
+    outs() << ((dl.dylib.compatibility_version >> 16) & 0xffff) << "."
+           << ((dl.dylib.compatibility_version >> 8) & 0xff) << "."
+           << (dl.dylib.compatibility_version & 0xff) << "\n";
+}
+
+static void PrintLinkEditDataCommand(MachO::linkedit_data_command ld,
+                                     uint32_t object_size) {
+  if (ld.cmd == MachO::LC_CODE_SIGNATURE)
+    outs() << "      cmd LC_FUNCTION_STARTS\n";
+  else if (ld.cmd == MachO::LC_SEGMENT_SPLIT_INFO)
+    outs() << "      cmd LC_SEGMENT_SPLIT_INFO\n";
+  else if (ld.cmd == MachO::LC_FUNCTION_STARTS)
+    outs() << "      cmd LC_FUNCTION_STARTS\n";
+  else if (ld.cmd == MachO::LC_DATA_IN_CODE)
+    outs() << "      cmd LC_DATA_IN_CODE\n";
+  else if (ld.cmd == MachO::LC_DYLIB_CODE_SIGN_DRS)
+    outs() << "      cmd LC_DYLIB_CODE_SIGN_DRS\n";
+  else if (ld.cmd == MachO::LC_LINKER_OPTIMIZATION_HINT)
+    outs() << "      cmd LC_LINKER_OPTIMIZATION_HINT\n";
+  else
+    outs() << "      cmd " << ld.cmd << " (?)\n";
+  outs() << "  cmdsize " << ld.cmdsize;
+  if (ld.cmdsize != sizeof(struct MachO::linkedit_data_command))
+    outs() << " Incorrect size\n";
+  else
+    outs() << "\n";
+  outs() << "  dataoff " << ld.dataoff;
+  if (ld.dataoff > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+  outs() << " datasize " << ld.datasize;
+  uint64_t big_size = ld.dataoff;
+  big_size += ld.datasize;
+  if (big_size > object_size)
+    outs() << " (past end of file)\n";
+  else
+    outs() << "\n";
+}
+
+static void PrintLoadCommands(const MachOObjectFile *Obj, uint32_t ncmds,
+                              uint32_t filetype, uint32_t cputype,
+                              bool verbose) {
+  if (ncmds == 0)
+    return;
+  StringRef Buf = Obj->getData();
+  MachOObjectFile::LoadCommandInfo Command = Obj->getFirstLoadCommandInfo();
+  for (unsigned i = 0;; ++i) {
+    outs() << "Load command " << i << "\n";
+    if (Command.C.cmd == MachO::LC_SEGMENT) {
+      MachO::segment_command SLC = Obj->getSegmentLoadCommand(Command);
+      const char *sg_segname = SLC.segname;
+      PrintSegmentCommand(SLC.cmd, SLC.cmdsize, SLC.segname, SLC.vmaddr,
+                          SLC.vmsize, SLC.fileoff, SLC.filesize, SLC.maxprot,
+                          SLC.initprot, SLC.nsects, SLC.flags, Buf.size(),
+                          verbose);
+      for (unsigned j = 0; j < SLC.nsects; j++) {
+        MachO::section S = Obj->getSection(Command, j);
+        PrintSection(S.sectname, S.segname, S.addr, S.size, S.offset, S.align,
+                     S.reloff, S.nreloc, S.flags, S.reserved1, S.reserved2,
+                     SLC.cmd, sg_segname, filetype, Buf.size(), verbose);
+      }
+    } else if (Command.C.cmd == MachO::LC_SEGMENT_64) {
+      MachO::segment_command_64 SLC_64 = Obj->getSegment64LoadCommand(Command);
+      const char *sg_segname = SLC_64.segname;
+      PrintSegmentCommand(SLC_64.cmd, SLC_64.cmdsize, SLC_64.segname,
+                          SLC_64.vmaddr, SLC_64.vmsize, SLC_64.fileoff,
+                          SLC_64.filesize, SLC_64.maxprot, SLC_64.initprot,
+                          SLC_64.nsects, SLC_64.flags, Buf.size(), verbose);
+      for (unsigned j = 0; j < SLC_64.nsects; j++) {
+        MachO::section_64 S_64 = Obj->getSection64(Command, j);
+        PrintSection(S_64.sectname, S_64.segname, S_64.addr, S_64.size,
+                     S_64.offset, S_64.align, S_64.reloff, S_64.nreloc,
+                     S_64.flags, S_64.reserved1, S_64.reserved2, SLC_64.cmd,
+                     sg_segname, filetype, Buf.size(), verbose);
+      }
+    } else if (Command.C.cmd == MachO::LC_SYMTAB) {
+      MachO::symtab_command Symtab = Obj->getSymtabLoadCommand();
+      PrintSymtabLoadCommand(Symtab, Obj->is64Bit(), Buf.size());
+    } else if (Command.C.cmd == MachO::LC_DYSYMTAB) {
+      MachO::dysymtab_command Dysymtab = Obj->getDysymtabLoadCommand();
+      MachO::symtab_command Symtab = Obj->getSymtabLoadCommand();
+      PrintDysymtabLoadCommand(Dysymtab, Symtab.nsyms, Buf.size(),
+                               Obj->is64Bit());
+    } else if (Command.C.cmd == MachO::LC_DYLD_INFO ||
+               Command.C.cmd == MachO::LC_DYLD_INFO_ONLY) {
+      MachO::dyld_info_command DyldInfo = Obj->getDyldInfoLoadCommand(Command);
+      PrintDyldInfoLoadCommand(DyldInfo, Buf.size());
+    } else if (Command.C.cmd == MachO::LC_LOAD_DYLINKER ||
+               Command.C.cmd == MachO::LC_ID_DYLINKER ||
+               Command.C.cmd == MachO::LC_DYLD_ENVIRONMENT) {
+      MachO::dylinker_command Dyld = Obj->getDylinkerCommand(Command);
+      PrintDyldLoadCommand(Dyld, Command.Ptr);
+    } else if (Command.C.cmd == MachO::LC_UUID) {
+      MachO::uuid_command Uuid = Obj->getUuidCommand(Command);
+      PrintUuidLoadCommand(Uuid);
+    } else if (Command.C.cmd == MachO::LC_RPATH) {
+      MachO::rpath_command Rpath = Obj->getRpathCommand(Command);
+      PrintRpathLoadCommand(Rpath, Command.Ptr);
+    } else if (Command.C.cmd == MachO::LC_VERSION_MIN_MACOSX ||
+               Command.C.cmd == MachO::LC_VERSION_MIN_IPHONEOS) {
+      MachO::version_min_command Vd = Obj->getVersionMinLoadCommand(Command);
+      PrintVersionMinLoadCommand(Vd);
+    } else if (Command.C.cmd == MachO::LC_SOURCE_VERSION) {
+      MachO::source_version_command Sd = Obj->getSourceVersionCommand(Command);
+      PrintSourceVersionCommand(Sd);
+    } else if (Command.C.cmd == MachO::LC_MAIN) {
+      MachO::entry_point_command Ep = Obj->getEntryPointCommand(Command);
+      PrintEntryPointCommand(Ep);
+    } else if (Command.C.cmd == MachO::LC_ENCRYPTION_INFO) {
+      MachO::encryption_info_command Ei =
+          Obj->getEncryptionInfoCommand(Command);
+      PrintEncryptionInfoCommand(Ei, Buf.size());
+    } else if (Command.C.cmd == MachO::LC_ENCRYPTION_INFO_64) {
+      MachO::encryption_info_command_64 Ei =
+          Obj->getEncryptionInfoCommand64(Command);
+      PrintEncryptionInfoCommand64(Ei, Buf.size());
+    } else if (Command.C.cmd == MachO::LC_LINKER_OPTION) {
+      MachO::linker_option_command Lo =
+          Obj->getLinkerOptionLoadCommand(Command);
+      PrintLinkerOptionCommand(Lo, Command.Ptr);
+    } else if (Command.C.cmd == MachO::LC_SUB_FRAMEWORK) {
+      MachO::sub_framework_command Sf = Obj->getSubFrameworkCommand(Command);
+      PrintSubFrameworkCommand(Sf, Command.Ptr);
+    } else if (Command.C.cmd == MachO::LC_SUB_UMBRELLA) {
+      MachO::sub_umbrella_command Sf = Obj->getSubUmbrellaCommand(Command);
+      PrintSubUmbrellaCommand(Sf, Command.Ptr);
+    } else if (Command.C.cmd == MachO::LC_SUB_LIBRARY) {
+      MachO::sub_library_command Sl = Obj->getSubLibraryCommand(Command);
+      PrintSubLibraryCommand(Sl, Command.Ptr);
+    } else if (Command.C.cmd == MachO::LC_SUB_CLIENT) {
+      MachO::sub_client_command Sc = Obj->getSubClientCommand(Command);
+      PrintSubClientCommand(Sc, Command.Ptr);
+    } else if (Command.C.cmd == MachO::LC_ROUTINES) {
+      MachO::routines_command Rc = Obj->getRoutinesCommand(Command);
+      PrintRoutinesCommand(Rc);
+    } else if (Command.C.cmd == MachO::LC_ROUTINES_64) {
+      MachO::routines_command_64 Rc = Obj->getRoutinesCommand64(Command);
+      PrintRoutinesCommand64(Rc);
+    } else if (Command.C.cmd == MachO::LC_THREAD ||
+               Command.C.cmd == MachO::LC_UNIXTHREAD) {
+      MachO::thread_command Tc = Obj->getThreadCommand(Command);
+      PrintThreadCommand(Tc, Command.Ptr, Obj->isLittleEndian(), cputype);
+    } else if (Command.C.cmd == MachO::LC_LOAD_DYLIB ||
+               Command.C.cmd == MachO::LC_ID_DYLIB ||
+               Command.C.cmd == MachO::LC_LOAD_WEAK_DYLIB ||
+               Command.C.cmd == MachO::LC_REEXPORT_DYLIB ||
+               Command.C.cmd == MachO::LC_LAZY_LOAD_DYLIB ||
+               Command.C.cmd == MachO::LC_LOAD_UPWARD_DYLIB) {
+      MachO::dylib_command Dl = Obj->getDylibIDLoadCommand(Command);
+      PrintDylibCommand(Dl, Command.Ptr);
+    } else if (Command.C.cmd == MachO::LC_CODE_SIGNATURE ||
+               Command.C.cmd == MachO::LC_SEGMENT_SPLIT_INFO ||
+               Command.C.cmd == MachO::LC_FUNCTION_STARTS ||
+               Command.C.cmd == MachO::LC_DATA_IN_CODE ||
+               Command.C.cmd == MachO::LC_DYLIB_CODE_SIGN_DRS ||
+               Command.C.cmd == MachO::LC_LINKER_OPTIMIZATION_HINT) {
+      MachO::linkedit_data_command Ld =
+          Obj->getLinkeditDataLoadCommand(Command);
+      PrintLinkEditDataCommand(Ld, Buf.size());
+    } else {
+      outs() << "      cmd ?(" << format("0x%08" PRIx32, Command.C.cmd)
+             << ")\n";
+      outs() << "  cmdsize " << Command.C.cmdsize << "\n";
+      // TODO: get and print the raw bytes of the load command.
+    }
+    // TODO: print all the other kinds of load commands.
+    if (i == ncmds - 1)
+      break;
+    else
+      Command = Obj->getNextLoadCommandInfo(Command);
+  }
+}
+
+static void getAndPrintMachHeader(const MachOObjectFile *Obj, uint32_t &ncmds,
+                                  uint32_t &filetype, uint32_t &cputype,
+                                  bool verbose) {
+  if (Obj->is64Bit()) {
+    MachO::mach_header_64 H_64;
+    H_64 = Obj->getHeader64();
+    PrintMachHeader(H_64.magic, H_64.cputype, H_64.cpusubtype, H_64.filetype,
+                    H_64.ncmds, H_64.sizeofcmds, H_64.flags, verbose);
+    ncmds = H_64.ncmds;
+    filetype = H_64.filetype;
+    cputype = H_64.cputype;
+  } else {
+    MachO::mach_header H;
+    H = Obj->getHeader();
+    PrintMachHeader(H.magic, H.cputype, H.cpusubtype, H.filetype, H.ncmds,
+                    H.sizeofcmds, H.flags, verbose);
+    ncmds = H.ncmds;
+    filetype = H.filetype;
+    cputype = H.cputype;
+  }
+}
+
+void llvm::printMachOFileHeader(const object::ObjectFile *Obj) {
+  const MachOObjectFile *file = dyn_cast<const MachOObjectFile>(Obj);
+  uint32_t ncmds = 0;
+  uint32_t filetype = 0;
+  uint32_t cputype = 0;
+  getAndPrintMachHeader(file, ncmds, filetype, cputype, true);
+  PrintLoadCommands(file, ncmds, filetype, cputype, true);
+}
+
+//===----------------------------------------------------------------------===//
+// export trie dumping
+//===----------------------------------------------------------------------===//
+
+void llvm::printMachOExportsTrie(const object::MachOObjectFile *Obj) {
+  for (const llvm::object::ExportEntry &Entry : Obj->exports()) {
+    uint64_t Flags = Entry.flags();
+    bool ReExport = (Flags & MachO::EXPORT_SYMBOL_FLAGS_REEXPORT);
+    bool WeakDef = (Flags & MachO::EXPORT_SYMBOL_FLAGS_WEAK_DEFINITION);
+    bool ThreadLocal = ((Flags & MachO::EXPORT_SYMBOL_FLAGS_KIND_MASK) ==
+                        MachO::EXPORT_SYMBOL_FLAGS_KIND_THREAD_LOCAL);
+    bool Abs = ((Flags & MachO::EXPORT_SYMBOL_FLAGS_KIND_MASK) ==
+                MachO::EXPORT_SYMBOL_FLAGS_KIND_ABSOLUTE);
+    bool Resolver = (Flags & MachO::EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER);
+    if (ReExport)
+      outs() << "[re-export] ";
+    else
+      outs() << format("0x%08llX  ",
+                       Entry.address()); // FIXME:add in base address
+    outs() << Entry.name();
+    if (WeakDef || ThreadLocal || Resolver || Abs) {
+      bool NeedsComma = false;
+      outs() << " [";
+      if (WeakDef) {
+        outs() << "weak_def";
+        NeedsComma = true;
+      }
+      if (ThreadLocal) {
+        if (NeedsComma)
+          outs() << ", ";
+        outs() << "per-thread";
+        NeedsComma = true;
+      }
+      if (Abs) {
+        if (NeedsComma)
+          outs() << ", ";
+        outs() << "absolute";
+        NeedsComma = true;
+      }
+      if (Resolver) {
+        if (NeedsComma)
+          outs() << ", ";
+        outs() << format("resolver=0x%08llX", Entry.other());
+        NeedsComma = true;
+      }
+      outs() << "]";
+    }
+    if (ReExport) {
+      StringRef DylibName = "unknown";
+      int Ordinal = Entry.other() - 1;
+      Obj->getLibraryShortNameByIndex(Ordinal, DylibName);
+      if (Entry.otherName().empty())
+        outs() << " (from " << DylibName << ")";
+      else
+        outs() << " (" << Entry.otherName() << " from " << DylibName << ")";
+    }
+    outs() << "\n";
+  }
+}
+
+//===----------------------------------------------------------------------===//
+// rebase table dumping
+//===----------------------------------------------------------------------===//
+
+namespace {
+class SegInfo {
+public:
+  SegInfo(const object::MachOObjectFile *Obj);
+
+  StringRef segmentName(uint32_t SegIndex);
+  StringRef sectionName(uint32_t SegIndex, uint64_t SegOffset);
+  uint64_t address(uint32_t SegIndex, uint64_t SegOffset);
+
+private:
+  struct SectionInfo {
+    uint64_t Address;
+    uint64_t Size;
+    StringRef SectionName;
+    StringRef SegmentName;
+    uint64_t OffsetInSegment;
+    uint64_t SegmentStartAddress;
+    uint32_t SegmentIndex;
+  };
+  const SectionInfo &findSection(uint32_t SegIndex, uint64_t SegOffset);
+  SmallVector<SectionInfo, 32> Sections;
+};
+}
+
+SegInfo::SegInfo(const object::MachOObjectFile *Obj) {
+  // Build table of sections so segIndex/offset pairs can be translated.
+  uint32_t CurSegIndex = Obj->hasPageZeroSegment() ? 1 : 0;
+  StringRef CurSegName;
+  uint64_t CurSegAddress;
+  for (const SectionRef &Section : Obj->sections()) {
+    SectionInfo Info;
+    if (error(Section.getName(Info.SectionName)))
+      return;
+    Info.Address = Section.getAddress();
+    Info.Size = Section.getSize();
+    Info.SegmentName =
+        Obj->getSectionFinalSegmentName(Section.getRawDataRefImpl());
+    if (!Info.SegmentName.equals(CurSegName)) {
+      ++CurSegIndex;
+      CurSegName = Info.SegmentName;
+      CurSegAddress = Info.Address;
+    }
+    Info.SegmentIndex = CurSegIndex - 1;
+    Info.OffsetInSegment = Info.Address - CurSegAddress;
+    Info.SegmentStartAddress = CurSegAddress;
+    Sections.push_back(Info);
+  }
+}
+
+StringRef SegInfo::segmentName(uint32_t SegIndex) {
+  for (const SectionInfo &SI : Sections) {
+    if (SI.SegmentIndex == SegIndex)
+      return SI.SegmentName;
+  }
+  llvm_unreachable("invalid segIndex");
+}
+
+const SegInfo::SectionInfo &SegInfo::findSection(uint32_t SegIndex,
+                                                 uint64_t OffsetInSeg) {
+  for (const SectionInfo &SI : Sections) {
+    if (SI.SegmentIndex != SegIndex)
+      continue;
+    if (SI.OffsetInSegment > OffsetInSeg)
+      continue;
+    if (OffsetInSeg >= (SI.OffsetInSegment + SI.Size))
+      continue;
+    return SI;
+  }
+  llvm_unreachable("segIndex and offset not in any section");
+}
+
+StringRef SegInfo::sectionName(uint32_t SegIndex, uint64_t OffsetInSeg) {
+  return findSection(SegIndex, OffsetInSeg).SectionName;
+}
+
+uint64_t SegInfo::address(uint32_t SegIndex, uint64_t OffsetInSeg) {
+  const SectionInfo &SI = findSection(SegIndex, OffsetInSeg);
+  return SI.SegmentStartAddress + OffsetInSeg;
+}
+
+void llvm::printMachORebaseTable(const object::MachOObjectFile *Obj) {
+  // Build table of sections so names can used in final output.
+  SegInfo sectionTable(Obj);
+
+  outs() << "segment  section            address     type\n";
+  for (const llvm::object::MachORebaseEntry &Entry : Obj->rebaseTable()) {
+    uint32_t SegIndex = Entry.segmentIndex();
+    uint64_t OffsetInSeg = Entry.segmentOffset();
+    StringRef SegmentName = sectionTable.segmentName(SegIndex);
+    StringRef SectionName = sectionTable.sectionName(SegIndex, OffsetInSeg);
+    uint64_t Address = sectionTable.address(SegIndex, OffsetInSeg);
+
+    // Table lines look like: __DATA  __nl_symbol_ptr  0x0000F00C  pointer
+    outs() << format("%-8s %-18s 0x%08" PRIX64 "  %s\n",
+                     SegmentName.str().c_str(), SectionName.str().c_str(),
+                     Address, Entry.typeName().str().c_str());
+  }
+}
+
+static StringRef ordinalName(const object::MachOObjectFile *Obj, int Ordinal) {
+  StringRef DylibName;
+  switch (Ordinal) {
+  case MachO::BIND_SPECIAL_DYLIB_SELF:
+    return "this-image";
+  case MachO::BIND_SPECIAL_DYLIB_MAIN_EXECUTABLE:
+    return "main-executable";
+  case MachO::BIND_SPECIAL_DYLIB_FLAT_LOOKUP:
+    return "flat-namespace";
+  default:
+    if (Ordinal > 0) {
+      std::error_code EC =
+          Obj->getLibraryShortNameByIndex(Ordinal - 1, DylibName);
+      if (EC)
+        return "<<bad library ordinal>>";
+      return DylibName;
+    }
+  }
+  return "<<unknown special ordinal>>";
+}
+
+//===----------------------------------------------------------------------===//
+// bind table dumping
+//===----------------------------------------------------------------------===//
+
+void llvm::printMachOBindTable(const object::MachOObjectFile *Obj) {
+  // Build table of sections so names can used in final output.
+  SegInfo sectionTable(Obj);
+
+  outs() << "segment  section            address    type       "
+            "addend dylib            symbol\n";
+  for (const llvm::object::MachOBindEntry &Entry : Obj->bindTable()) {
+    uint32_t SegIndex = Entry.segmentIndex();
+    uint64_t OffsetInSeg = Entry.segmentOffset();
+    StringRef SegmentName = sectionTable.segmentName(SegIndex);
+    StringRef SectionName = sectionTable.sectionName(SegIndex, OffsetInSeg);
+    uint64_t Address = sectionTable.address(SegIndex, OffsetInSeg);
+
+    // Table lines look like:
+    //  __DATA  __got  0x00012010    pointer   0 libSystem ___stack_chk_guard
+    StringRef Attr;
+    if (Entry.flags() & MachO::BIND_SYMBOL_FLAGS_WEAK_IMPORT)
+      Attr = " (weak_import)";
+    outs() << left_justify(SegmentName, 8) << " "
+           << left_justify(SectionName, 18) << " "
+           << format_hex(Address, 10, true) << " "
+           << left_justify(Entry.typeName(), 8) << " "
+           << format_decimal(Entry.addend(), 8) << " "
+           << left_justify(ordinalName(Obj, Entry.ordinal()), 16) << " "
+           << Entry.symbolName() << Attr << "\n";
+  }
+}
+
+//===----------------------------------------------------------------------===//
+// lazy bind table dumping
+//===----------------------------------------------------------------------===//
+
+void llvm::printMachOLazyBindTable(const object::MachOObjectFile *Obj) {
+  // Build table of sections so names can used in final output.
+  SegInfo sectionTable(Obj);
+
+  outs() << "segment  section            address     "
+            "dylib            symbol\n";
+  for (const llvm::object::MachOBindEntry &Entry : Obj->lazyBindTable()) {
+    uint32_t SegIndex = Entry.segmentIndex();
+    uint64_t OffsetInSeg = Entry.segmentOffset();
+    StringRef SegmentName = sectionTable.segmentName(SegIndex);
+    StringRef SectionName = sectionTable.sectionName(SegIndex, OffsetInSeg);
+    uint64_t Address = sectionTable.address(SegIndex, OffsetInSeg);
+
+    // Table lines look like:
+    //  __DATA  __got  0x00012010 libSystem ___stack_chk_guard
+    outs() << left_justify(SegmentName, 8) << " "
+           << left_justify(SectionName, 18) << " "
+           << format_hex(Address, 10, true) << " "
+           << left_justify(ordinalName(Obj, Entry.ordinal()), 16) << " "
+           << Entry.symbolName() << "\n";
+  }
+}
+
+//===----------------------------------------------------------------------===//
+// weak bind table dumping
+//===----------------------------------------------------------------------===//
+
+void llvm::printMachOWeakBindTable(const object::MachOObjectFile *Obj) {
+  // Build table of sections so names can used in final output.
+  SegInfo sectionTable(Obj);
+
+  outs() << "segment  section            address     "
+            "type       addend   symbol\n";
+  for (const llvm::object::MachOBindEntry &Entry : Obj->weakBindTable()) {
+    // Strong symbols don't have a location to update.
+    if (Entry.flags() & MachO::BIND_SYMBOL_FLAGS_NON_WEAK_DEFINITION) {
+      outs() << "                                        strong              "
+             << Entry.symbolName() << "\n";
+      continue;
+    }
+    uint32_t SegIndex = Entry.segmentIndex();
+    uint64_t OffsetInSeg = Entry.segmentOffset();
+    StringRef SegmentName = sectionTable.segmentName(SegIndex);
+    StringRef SectionName = sectionTable.sectionName(SegIndex, OffsetInSeg);
+    uint64_t Address = sectionTable.address(SegIndex, OffsetInSeg);
+
+    // Table lines look like:
+    // __DATA  __data  0x00001000  pointer    0   _foo
+    outs() << left_justify(SegmentName, 8) << " "
+           << left_justify(SectionName, 18) << " "
+           << format_hex(Address, 10, true) << " "
+           << left_justify(Entry.typeName(), 8) << " "
+           << format_decimal(Entry.addend(), 8) << "   " << Entry.symbolName()
+           << "\n";
+  }
+}
+
+// get_dyld_bind_info_symbolname() is used for disassembly and passed an
+// address, ReferenceValue, in the Mach-O file and looks in the dyld bind
+// information for that address. If the address is found its binding symbol
+// name is returned.  If not nullptr is returned.
+static const char *get_dyld_bind_info_symbolname(uint64_t ReferenceValue,
+                                                 struct DisassembleInfo *info) {
+  if (info->bindtable == nullptr) {
+    info->bindtable = new (BindTable);
+    SegInfo sectionTable(info->O);
+    for (const llvm::object::MachOBindEntry &Entry : info->O->bindTable()) {
+      uint32_t SegIndex = Entry.segmentIndex();
+      uint64_t OffsetInSeg = Entry.segmentOffset();
+      uint64_t Address = sectionTable.address(SegIndex, OffsetInSeg);
+      const char *SymbolName = nullptr;
+      StringRef name = Entry.symbolName();
+      if (!name.empty())
+        SymbolName = name.data();
+      info->bindtable->push_back(std::make_pair(Address, SymbolName));
+    }
+  }
+  for (bind_table_iterator BI = info->bindtable->begin(),
+                           BE = info->bindtable->end();
+       BI != BE; ++BI) {
+    uint64_t Address = BI->first;
+    if (ReferenceValue == Address) {
+      const char *SymbolName = BI->second;
+      return SymbolName;
+    }
+  }
+  return nullptr;
+}
diff --git a/tools/llvm-objdump/Makefile b/tools/llvm-objdump/Makefile
index c3601ebc14ee..4616b78adb2e 100644
--- a/tools/llvm-objdump/Makefile
+++ b/tools/llvm-objdump/Makefile
@@ -9,7 +9,7 @@
 
 LEVEL := ../..
 TOOLNAME := llvm-objdump
-LINK_COMPONENTS := all-targets DebugInfo MC MCAnalysis MCParser MCDisassembler Object
+LINK_COMPONENTS := all-targets DebugInfo MC MCParser MCDisassembler Object
 
 # This tool has no plugins, optimize startup time.
 TOOL_NO_EXPORTS := 1
diff --git a/tools/llvm-objdump/llvm-objdump.cpp b/tools/llvm-objdump/llvm-objdump.cpp
index 3cd48e7f0d1b..aff6272d2fa3 100644
--- a/tools/llvm-objdump/llvm-objdump.cpp
+++ b/tools/llvm-objdump/llvm-objdump.cpp
@@ -20,10 +20,6 @@
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/Triple.h"
-#include "llvm/MC/MCAnalysis/MCAtom.h"
-#include "llvm/MC/MCAnalysis/MCFunction.h"
-#include "llvm/MC/MCAnalysis/MCModule.h"
-#include "llvm/MC/MCAnalysis/MCModuleYAML.h"
 #include "llvm/MC/MCAsmInfo.h"
 #include "llvm/MC/MCContext.h"
 #include "llvm/MC/MCDisassembler.h"
@@ -31,9 +27,7 @@
 #include "llvm/MC/MCInstPrinter.h"
 #include "llvm/MC/MCInstrAnalysis.h"
 #include "llvm/MC/MCInstrInfo.h"
-#include "llvm/MC/MCObjectDisassembler.h"
 #include "llvm/MC/MCObjectFileInfo.h"
-#include "llvm/MC/MCObjectSymbolizer.h"
 #include "llvm/MC/MCRegisterInfo.h"
 #include "llvm/MC/MCRelocationInfo.h"
 #include "llvm/MC/MCSubtargetInfo.h"
@@ -50,7 +44,6 @@
 #include "llvm/Support/Host.h"
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/MemoryBuffer.h"
-#include "llvm/Support/MemoryObject.h"
 #include "llvm/Support/PrettyStackTrace.h"
 #include "llvm/Support/Signals.h"
 #include "llvm/Support/SourceMgr.h"
@@ -68,8 +61,8 @@ using namespace object;
 static cl::list<std::string>
 InputFilenames(cl::Positional, cl::desc("<input object files>"),cl::ZeroOrMore);
 
-static cl::opt<bool>
-Disassemble("disassemble",
+cl::opt<bool>
+llvm::Disassemble("disassemble",
   cl::desc("Display assembler mnemonics for the machine instructions"));
 static cl::alias
 Disassembled("d", cl::desc("Alias for --disassemble"),
@@ -84,6 +77,21 @@ SectionContents("s", cl::desc("Display the content of each section"));
 static cl::opt<bool>
 SymbolTable("t", cl::desc("Display the symbol table"));
 
+cl::opt<bool>
+llvm::ExportsTrie("exports-trie", cl::desc("Display mach-o exported symbols"));
+
+cl::opt<bool>
+llvm::Rebase("rebase", cl::desc("Display mach-o rebasing info"));
+
+cl::opt<bool>
+llvm::Bind("bind", cl::desc("Display mach-o binding info"));
+
+cl::opt<bool>
+llvm::LazyBind("lazy-bind", cl::desc("Display mach-o lazy binding info"));
+
+cl::opt<bool>
+llvm::WeakBind("weak-bind", cl::desc("Display mach-o weak binding info"));
+
 static cl::opt<bool>
 MachOOpt("macho", cl::desc("Use MachO specific object file parser"));
 static cl::alias
@@ -94,7 +102,13 @@ llvm::TripleName("triple", cl::desc("Target triple to disassemble for, "
                                     "see -version for available targets"));
 
 cl::opt<std::string>
-llvm::ArchName("arch", cl::desc("Target arch to disassemble for, "
+llvm::MCPU("mcpu",
+     cl::desc("Target a specific cpu type (-mcpu=help for details)"),
+     cl::value_desc("cpu-name"),
+     cl::init(""));
+
+cl::opt<std::string>
+llvm::ArchName("arch-name", cl::desc("Target arch to disassemble for, "
                                 "see -version for available targets"));
 
 static cl::opt<bool>
@@ -107,15 +121,16 @@ static cl::alias
 SectionHeadersShorter("h", cl::desc("Alias for --section-headers"),
                       cl::aliasopt(SectionHeaders));
 
-static cl::list<std::string>
-MAttrs("mattr",
+cl::list<std::string>
+llvm::MAttrs("mattr",
   cl::CommaSeparated,
   cl::desc("Target specific attributes"),
   cl::value_desc("a1,+a2,-a3,..."));
 
-static cl::opt<bool>
-NoShowRawInsn("no-show-raw-insn", cl::desc("When disassembling instructions, "
-                                           "do not print the instruction bytes."));
+cl::opt<bool>
+llvm::NoShowRawInsn("no-show-raw-insn", cl::desc("When disassembling "
+                                                 "instructions, do not print "
+                                                 "the instruction bytes."));
 
 static cl::opt<bool>
 UnwindInfo("unwind-info", cl::desc("Display unwind information"));
@@ -124,29 +139,16 @@ static cl::alias
 UnwindInfoShort("u", cl::desc("Alias for --unwind-info"),
                 cl::aliasopt(UnwindInfo));
 
-static cl::opt<bool>
-PrivateHeaders("private-headers",
-               cl::desc("Display format specific file headers"));
+cl::opt<bool>
+llvm::PrivateHeaders("private-headers",
+                     cl::desc("Display format specific file headers"));
 
 static cl::alias
 PrivateHeadersShort("p", cl::desc("Alias for --private-headers"),
                     cl::aliasopt(PrivateHeaders));
 
-static cl::opt<bool>
-Symbolize("symbolize", cl::desc("When disassembling instructions, "
-                                "try to symbolize operands."));
-
-static cl::opt<bool>
-CFG("cfg", cl::desc("Create a CFG for every function found in the object"
-                      " and write it to a graphviz file"));
-
-// FIXME: Does it make sense to have a dedicated tool for yaml cfg output?
-static cl::opt<std::string>
-YAMLCFG("yaml-cfg",
-        cl::desc("Create a CFG and write it as a YAML MCModule."),
-        cl::value_desc("yaml output file"));
-
 static StringRef ToolName;
+static int ReturnValue = EXIT_SUCCESS;
 
 bool llvm::error(std::error_code EC) {
   if (!EC)
@@ -154,6 +156,7 @@ bool llvm::error(std::error_code EC) {
 
   outs() << ToolName << ": error reading file: " << EC.message() << ".\n";
   outs().flush();
+  ReturnValue = EXIT_FAILURE;
   return true;
 }
 
@@ -191,53 +194,6 @@ static const Target *getTarget(const ObjectFile *Obj = nullptr) {
   return TheTarget;
 }
 
-// Write a graphviz file for the CFG inside an MCFunction.
-// FIXME: Use GraphWriter
-static void emitDOTFile(const char *FileName, const MCFunction &f,
-                        MCInstPrinter *IP) {
-  // Start a new dot file.
-  std::string Error;
-  raw_fd_ostream Out(FileName, Error, sys::fs::F_Text);
-  if (!Error.empty()) {
-    errs() << "llvm-objdump: warning: " << Error << '\n';
-    return;
-  }
-
-  Out << "digraph \"" << f.getName() << "\" {\n";
-  Out << "graph [ rankdir = \"LR\" ];\n";
-  for (MCFunction::const_iterator i = f.begin(), e = f.end(); i != e; ++i) {
-    // Only print blocks that have predecessors.
-    bool hasPreds = (*i)->pred_begin() != (*i)->pred_end();
-
-    if (!hasPreds && i != f.begin())
-      continue;
-
-    Out << '"' << (*i)->getInsts()->getBeginAddr() << "\" [ label=\"<a>";
-    // Print instructions.
-    for (unsigned ii = 0, ie = (*i)->getInsts()->size(); ii != ie;
-        ++ii) {
-      if (ii != 0) // Not the first line, start a new row.
-        Out << '|';
-      if (ii + 1 == ie) // Last line, add an end id.
-        Out << "<o>";
-
-      // Escape special chars and print the instruction in mnemonic form.
-      std::string Str;
-      raw_string_ostream OS(Str);
-      IP->printInst(&(*i)->getInsts()->at(ii).Inst, OS, "");
-      Out << DOT::EscapeString(OS.str());
-    }
-    Out << "\" shape=\"record\" ];\n";
-
-    // Add edges.
-    for (MCBasicBlock::succ_const_iterator si = (*i)->succ_begin(),
-        se = (*i)->succ_end(); si != se; ++si)
-      Out << (*i)->getInsts()->getBeginAddr() << ":o -> "
-          << (*si)->getInsts()->getBeginAddr() << ":a\n";
-  }
-  Out << "}\n";
-}
-
 void llvm::DumpBytes(StringRef bytes) {
   static const char hex_rep[] = "0123456789abcdef";
   // FIXME: The real way to do this is to figure out the longest instruction
@@ -303,7 +259,7 @@ static void DisassembleObject(const ObjectFile *Obj, bool InlineRelocs) {
   }
 
   std::unique_ptr<const MCSubtargetInfo> STI(
-      TheTarget->createMCSubtargetInfo(TripleName, "", FeaturesStr));
+      TheTarget->createMCSubtargetInfo(TripleName, MCPU, FeaturesStr));
   if (!STI) {
     errs() << "error: no subtarget info for target " << TripleName << "\n";
     return;
@@ -326,19 +282,6 @@ static void DisassembleObject(const ObjectFile *Obj, bool InlineRelocs) {
     return;
   }
 
-
-  if (Symbolize) {
-    std::unique_ptr<MCRelocationInfo> RelInfo(
-        TheTarget->createMCRelocationInfo(TripleName, Ctx));
-    if (RelInfo) {
-      std::unique_ptr<MCSymbolizer> Symzer(
-        MCObjectSymbolizer::createObjectSymbolizer(Ctx, std::move(RelInfo),
-                                                   Obj));
-      if (Symzer)
-        DisAsm->setSymbolizer(std::move(Symzer));
-    }
-  }
-
   std::unique_ptr<const MCInstrAnalysis> MIA(
       TheTarget->createMCInstrAnalysis(MII.get()));
 
@@ -351,45 +294,6 @@ static void DisassembleObject(const ObjectFile *Obj, bool InlineRelocs) {
     return;
   }
 
-  if (CFG || !YAMLCFG.empty()) {
-    std::unique_ptr<MCObjectDisassembler> OD(
-        new MCObjectDisassembler(*Obj, *DisAsm, *MIA));
-    std::unique_ptr<MCModule> Mod(OD->buildModule(/* withCFG */ true));
-    for (MCModule::const_atom_iterator AI = Mod->atom_begin(),
-                                       AE = Mod->atom_end();
-                                       AI != AE; ++AI) {
-      outs() << "Atom " << (*AI)->getName() << ": \n";
-      if (const MCTextAtom *TA = dyn_cast<MCTextAtom>(*AI)) {
-        for (MCTextAtom::const_iterator II = TA->begin(), IE = TA->end();
-             II != IE;
-             ++II) {
-          IP->printInst(&II->Inst, outs(), "");
-          outs() << "\n";
-        }
-      }
-    }
-    if (CFG) {
-      for (MCModule::const_func_iterator FI = Mod->func_begin(),
-                                         FE = Mod->func_end();
-                                         FI != FE; ++FI) {
-        static int filenum = 0;
-        emitDOTFile((Twine((*FI)->getName()) + "_" +
-                     utostr(filenum) + ".dot").str().c_str(),
-                      **FI, IP.get());
-        ++filenum;
-      }
-    }
-    if (!YAMLCFG.empty()) {
-      std::string Error;
-      raw_fd_ostream YAMLOut(YAMLCFG.c_str(), Error, sys::fs::F_Text);
-      if (!Error.empty()) {
-        errs() << ToolName << ": warning: " << Error << '\n';
-        return;
-      }
-      mcmodule2yaml(YAMLOut, *Mod, *MII, *MRI);
-    }
-  }
-
   StringRef Fmt = Obj->getBytesInAddress() > 4 ? "\t\t%016" PRIx64 ":  " :
                                                  "\t\t\t%08" PRIx64 ":  ";
 
@@ -404,25 +308,18 @@ static void DisassembleObject(const ObjectFile *Obj, bool InlineRelocs) {
   }
 
   for (const SectionRef &Section : Obj->sections()) {
-    bool Text;
-    if (error(Section.isText(Text)))
-      break;
-    if (!Text)
+    if (!Section.isText() || Section.isVirtual())
       continue;
 
-    uint64_t SectionAddr;
-    if (error(Section.getAddress(SectionAddr)))
-      break;
-
-    uint64_t SectSize;
-    if (error(Section.getSize(SectSize)))
-      break;
+    uint64_t SectionAddr = Section.getAddress();
+    uint64_t SectSize = Section.getSize();
+    if (!SectSize)
+      continue;
 
     // Make a list of all the symbols in this section.
     std::vector<std::pair<uint64_t, StringRef>> Symbols;
     for (const SymbolRef &Symbol : Obj->symbols()) {
-      bool contains;
-      if (!error(Section.containsSymbol(Symbol, contains)) && contains) {
+      if (Section.containsSymbol(Symbol)) {
         uint64_t Address;
         if (error(Symbol.getAddress(Address)))
           break;
@@ -477,10 +374,12 @@ static void DisassembleObject(const ObjectFile *Obj, bool InlineRelocs) {
     SmallString<40> Comments;
     raw_svector_ostream CommentStream(Comments);
 
-    StringRef Bytes;
-    if (error(Section.getContents(Bytes)))
+    StringRef BytesStr;
+    if (error(Section.getContents(BytesStr)))
       break;
-    StringRefMemoryObject memoryObject(Bytes, SectionAddr);
+    ArrayRef<uint8_t> Bytes(reinterpret_cast<const uint8_t *>(BytesStr.data()),
+                            BytesStr.size());
+
     uint64_t Size;
     uint64_t Index;
 
@@ -488,17 +387,12 @@ static void DisassembleObject(const ObjectFile *Obj, bool InlineRelocs) {
     std::vector<RelocationRef>::const_iterator rel_end = Rels.end();
     // Disassemble symbol by symbol.
     for (unsigned si = 0, se = Symbols.size(); si != se; ++si) {
+
       uint64_t Start = Symbols[si].first;
-      uint64_t End;
-      // The end is either the size of the section or the beginning of the next
-      // symbol.
-      if (si == se - 1)
-        End = SectSize;
-      // Make sure this symbol takes up space.
-      else if (Symbols[si + 1].first != Start)
-        End = Symbols[si + 1].first - 1;
-      else
-        // This symbol has the same address as the next symbol. Skip it.
+      // The end is either the section end or the beginning of the next symbol.
+      uint64_t End = (si == se - 1) ? SectSize : Symbols[si + 1].first;
+      // If this symbol has the same address as the next symbol, then skip it.
+      if (Start == End)
         continue;
 
       outs() << '\n' << Symbols[si].second << ":\n";
@@ -512,13 +406,14 @@ static void DisassembleObject(const ObjectFile *Obj, bool InlineRelocs) {
       for (Index = Start; Index < End; Index += Size) {
         MCInst Inst;
 
-        if (DisAsm->getInstruction(Inst, Size, memoryObject,
-                                   SectionAddr + Index,
-                                   DebugOut, CommentStream)) {
+        if (DisAsm->getInstruction(Inst, Size, Bytes.slice(Index),
+                                   SectionAddr + Index, DebugOut,
+                                   CommentStream)) {
           outs() << format("%8" PRIx64 ":", SectionAddr + Index);
           if (!NoShowRawInsn) {
             outs() << "\t";
-            DumpBytes(StringRef(Bytes.data() + Index, Size));
+            DumpBytes(StringRef(
+                reinterpret_cast<const char *>(Bytes.data()) + Index, Size));
           }
           IP->printInst(&Inst, outs(), "");
           outs() << CommentStream.str();
@@ -561,6 +456,11 @@ static void DisassembleObject(const ObjectFile *Obj, bool InlineRelocs) {
 static void PrintRelocations(const ObjectFile *Obj) {
   StringRef Fmt = Obj->getBytesInAddress() > 4 ? "%016" PRIx64 :
                                                  "%08" PRIx64;
+  // Regular objdump doesn't print relocations in non-relocatable object
+  // files.
+  if (!Obj->isRelocatableObject())
+    return;
+
   for (const SectionRef &Section : Obj->sections()) {
     if (Section.relocation_begin() == Section.relocation_end())
       continue;
@@ -598,19 +498,11 @@ static void PrintSectionHeaders(const ObjectFile *Obj) {
     StringRef Name;
     if (error(Section.getName(Name)))
       return;
-    uint64_t Address;
-    if (error(Section.getAddress(Address)))
-      return;
-    uint64_t Size;
-    if (error(Section.getSize(Size)))
-      return;
-    bool Text, Data, BSS;
-    if (error(Section.isText(Text)))
-      return;
-    if (error(Section.isData(Data)))
-      return;
-    if (error(Section.isBSS(BSS)))
-      return;
+    uint64_t Address = Section.getAddress();
+    uint64_t Size = Section.getSize();
+    bool Text = Section.isText();
+    bool Data = Section.isData();
+    bool BSS = Section.isBSS();
     std::string Type = (std::string(Text ? "TEXT " : "") +
                         (Data ? "DATA " : "") + (BSS ? "BSS" : ""));
     outs() << format("%3d %-13s %08" PRIx64 " %016" PRIx64 " %s\n", i,
@@ -624,20 +516,15 @@ static void PrintSectionContents(const ObjectFile *Obj) {
   for (const SectionRef &Section : Obj->sections()) {
     StringRef Name;
     StringRef Contents;
-    uint64_t BaseAddr;
-    bool BSS;
     if (error(Section.getName(Name)))
       continue;
-    if (error(Section.getAddress(BaseAddr)))
-      continue;
-    if (error(Section.isBSS(BSS)))
+    uint64_t BaseAddr = Section.getAddress();
+    uint64_t Size = Section.getSize();
+    if (!Size)
       continue;
 
     outs() << "Contents of section " << Name << ":\n";
-    if (BSS) {
-      uint64_t Size;
-      if (error(Section.getSize(Size)))
-        continue;
+    if (Section.isBSS()) {
       outs() << format("<skipping contents of bss section at [%04" PRIx64
                        ", %04" PRIx64 ")>\n",
                        BaseAddr, BaseAddr + Size);
@@ -674,34 +561,32 @@ static void PrintSectionContents(const ObjectFile *Obj) {
 }
 
 static void PrintCOFFSymbolTable(const COFFObjectFile *coff) {
-  const coff_file_header *header;
-  if (error(coff->getHeader(header)))
-    return;
-
-  for (unsigned SI = 0, SE = header->NumberOfSymbols; SI != SE; ++SI) {
-    const coff_symbol *Symbol;
+  for (unsigned SI = 0, SE = coff->getNumberOfSymbols(); SI != SE; ++SI) {
+    ErrorOr<COFFSymbolRef> Symbol = coff->getSymbol(SI);
     StringRef Name;
-    if (error(coff->getSymbol(SI, Symbol)))
+    if (error(Symbol.getError()))
       return;
 
-    if (error(coff->getSymbolName(Symbol, Name)))
+    if (error(coff->getSymbolName(*Symbol, Name)))
       return;
 
     outs() << "[" << format("%2d", SI) << "]"
-           << "(sec " << format("%2d", int(Symbol->SectionNumber)) << ")"
+           << "(sec " << format("%2d", int(Symbol->getSectionNumber())) << ")"
            << "(fl 0x00)" // Flag bits, which COFF doesn't have.
-           << "(ty " << format("%3x", unsigned(Symbol->Type)) << ")"
-           << "(scl " << format("%3x", unsigned(Symbol->StorageClass)) << ") "
-           << "(nx " << unsigned(Symbol->NumberOfAuxSymbols) << ") "
-           << "0x" << format("%08x", unsigned(Symbol->Value)) << " "
+           << "(ty " << format("%3x", unsigned(Symbol->getType())) << ")"
+           << "(scl " << format("%3x", unsigned(Symbol->getStorageClass())) << ") "
+           << "(nx " << unsigned(Symbol->getNumberOfAuxSymbols()) << ") "
+           << "0x" << format("%08x", unsigned(Symbol->getValue())) << " "
            << Name << "\n";
 
-    for (unsigned AI = 0, AE = Symbol->NumberOfAuxSymbols; AI < AE; ++AI, ++SI) {
+    for (unsigned AI = 0, AE = Symbol->getNumberOfAuxSymbols(); AI < AE; ++AI, ++SI) {
       if (Symbol->isSectionDefinition()) {
         const coff_aux_section_definition *asd;
         if (error(coff->getAuxSymbol<coff_aux_section_definition>(SI + 1, asd)))
           return;
 
+        int32_t AuxNumber = asd->getNumber(Symbol->isBigObj());
+
         outs() << "AUX "
                << format("scnlen 0x%x nreloc %d nlnno %d checksum 0x%x "
                          , unsigned(asd->Length)
@@ -709,18 +594,18 @@ static void PrintCOFFSymbolTable(const COFFObjectFile *coff) {
                          , unsigned(asd->NumberOfLinenumbers)
                          , unsigned(asd->CheckSum))
                << format("assoc %d comdat %d\n"
-                         , unsigned(asd->Number)
+                         , unsigned(AuxNumber)
                          , unsigned(asd->Selection));
       } else if (Symbol->isFileRecord()) {
-        const coff_aux_file *AF;
-        if (error(coff->getAuxSymbol<coff_aux_file>(SI + 1, AF)))
+        const char *FileName;
+        if (error(coff->getAuxSymbol<char>(SI + 1, FileName)))
           return;
 
-        StringRef Name(AF->FileName,
-                       Symbol->NumberOfAuxSymbols * COFF::SymbolSize);
+        StringRef Name(FileName, Symbol->getNumberOfAuxSymbols() *
+                                     coff->getSymbolTableEntrySize());
         outs() << "AUX " << Name.rtrim(StringRef("\0", 1))  << '\n';
 
-        SI = SI + Symbol->NumberOfAuxSymbols;
+        SI = SI + Symbol->getNumberOfAuxSymbols();
         break;
       } else {
         outs() << "AUX Unknown\n";
@@ -813,10 +698,67 @@ static void PrintUnwindInfo(const ObjectFile *o) {
 
   if (const COFFObjectFile *coff = dyn_cast<COFFObjectFile>(o)) {
     printCOFFUnwindInfo(coff);
-  } else {
+  } else if (const MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(o))
+    printMachOUnwindInfo(MachO);
+  else {
     // TODO: Extract DWARF dump tool to objdump.
     errs() << "This operation is only currently supported "
-              "for COFF object files.\n";
+              "for COFF and MachO object files.\n";
+    return;
+  }
+}
+
+void llvm::printExportsTrie(const ObjectFile *o) {
+  outs() << "Exports trie:\n";
+  if (const MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(o))
+    printMachOExportsTrie(MachO);
+  else {
+    errs() << "This operation is only currently supported "
+              "for Mach-O executable files.\n";
+    return;
+  }
+}
+
+void llvm::printRebaseTable(const ObjectFile *o) {
+  outs() << "Rebase table:\n";
+  if (const MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(o))
+    printMachORebaseTable(MachO);
+  else {
+    errs() << "This operation is only currently supported "
+              "for Mach-O executable files.\n";
+    return;
+  }
+}
+
+void llvm::printBindTable(const ObjectFile *o) {
+  outs() << "Bind table:\n";
+  if (const MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(o))
+    printMachOBindTable(MachO);
+  else {
+    errs() << "This operation is only currently supported "
+              "for Mach-O executable files.\n";
+    return;
+  }
+}
+
+void llvm::printLazyBindTable(const ObjectFile *o) {
+  outs() << "Lazy bind table:\n";
+  if (const MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(o))
+    printMachOLazyBindTable(MachO);
+  else {
+    errs() << "This operation is only currently supported "
+              "for Mach-O executable files.\n";
+    return;
+  }
+}
+
+void llvm::printWeakBindTable(const ObjectFile *o) {
+  outs() << "Weak bind table:\n";
+  if (const MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(o))
+    printMachOWeakBindTable(MachO);
+  else {
+    errs() << "This operation is only currently supported "
+              "for Mach-O executable files.\n";
     return;
   }
 }
@@ -826,6 +768,8 @@ static void printPrivateFileHeader(const ObjectFile *o) {
     printELFFileHeader(o);
   } else if (o->isCOFF()) {
     printCOFFFileHeader(o);
+  } else if (o->isMachO()) {
+    printMachOFileHeader(o);
   }
 }
 
@@ -848,6 +792,16 @@ static void DumpObject(const ObjectFile *o) {
     PrintUnwindInfo(o);
   if (PrivateHeaders)
     printPrivateFileHeader(o);
+  if (ExportsTrie)
+    printExportsTrie(o);
+  if (Rebase)
+    printRebaseTable(o);
+  if (Bind)
+    printBindTable(o);
+  if (LazyBind)
+    printLazyBindTable(o);
+  if (WeakBind)
+    printWeakBindTable(o);
 }
 
 /// @brief Dump each object file in \a a;
@@ -878,22 +832,25 @@ static void DumpInput(StringRef file) {
     return;
   }
 
-  if (MachOOpt && Disassemble) {
-    DisassembleInputMachO(file);
+  // If we are using the Mach-O specific object file parser, then let it parse
+  // the file and process the command line options.  So the -arch flags can
+  // be used to select specific slices, etc.
+  if (MachOOpt) {
+    ParseInputMachO(file);
     return;
   }
 
   // Attempt to open the binary.
-  ErrorOr<Binary *> BinaryOrErr = createBinary(file);
+  ErrorOr<OwningBinary<Binary>> BinaryOrErr = createBinary(file);
   if (std::error_code EC = BinaryOrErr.getError()) {
     errs() << ToolName << ": '" << file << "': " << EC.message() << ".\n";
     return;
   }
-  std::unique_ptr<Binary> binary(BinaryOrErr.get());
+  Binary &Binary = *BinaryOrErr.get().getBinary();
 
-  if (Archive *a = dyn_cast<Archive>(binary.get()))
+  if (Archive *a = dyn_cast<Archive>(&Binary))
     DumpArchive(a);
-  else if (ObjectFile *o = dyn_cast<ObjectFile>(binary.get()))
+  else if (ObjectFile *o = dyn_cast<ObjectFile>(&Binary))
     DumpObject(o);
   else
     errs() << ToolName << ": '" << file << "': " << "Unrecognized file type.\n";
@@ -929,7 +886,13 @@ int main(int argc, char **argv) {
       && !SectionContents
       && !SymbolTable
       && !UnwindInfo
-      && !PrivateHeaders) {
+      && !PrivateHeaders
+      && !ExportsTrie
+      && !Rebase
+      && !Bind
+      && !LazyBind
+      && !WeakBind
+      && !(UniversalHeaders && MachOOpt)) {
     cl::PrintHelpMessage();
     return 2;
   }
@@ -937,5 +900,5 @@ int main(int argc, char **argv) {
   std::for_each(InputFilenames.begin(), InputFilenames.end(),
                 DumpInput);
 
-  return 0;
+  return ReturnValue;
 }
diff --git a/tools/llvm-objdump/llvm-objdump.h b/tools/llvm-objdump/llvm-objdump.h
index 80f8f581a880..f829dd1a71c3 100644
--- a/tools/llvm-objdump/llvm-objdump.h
+++ b/tools/llvm-objdump/llvm-objdump.h
@@ -7,32 +7,55 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_OBJDUMP_H
-#define LLVM_OBJDUMP_H
+#ifndef LLVM_TOOLS_LLVM_OBJDUMP_LLVM_OBJDUMP_H
+#define LLVM_TOOLS_LLVM_OBJDUMP_LLVM_OBJDUMP_H
 
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/DataTypes.h"
-#include "llvm/Support/StringRefMemoryObject.h"
 
 namespace llvm {
 namespace object {
   class COFFObjectFile;
+  class MachOObjectFile;
   class ObjectFile;
   class RelocationRef;
 }
 
 extern cl::opt<std::string> TripleName;
 extern cl::opt<std::string> ArchName;
+extern cl::opt<std::string> MCPU;
+extern cl::list<std::string> MAttrs;
+extern cl::opt<bool> Disassemble;
+extern cl::opt<bool> NoShowRawInsn;
+extern cl::opt<bool> PrivateHeaders;
+extern cl::opt<bool> ExportsTrie;
+extern cl::opt<bool> Rebase;
+extern cl::opt<bool> Bind;
+extern cl::opt<bool> LazyBind;
+extern cl::opt<bool> WeakBind;
+extern cl::opt<bool> UniversalHeaders;
 
 // Various helper functions.
 bool error(std::error_code ec);
 bool RelocAddressLess(object::RelocationRef a, object::RelocationRef b);
 void DumpBytes(StringRef bytes);
-void DisassembleInputMachO(StringRef Filename);
+void ParseInputMachO(StringRef Filename);
 void printCOFFUnwindInfo(const object::COFFObjectFile* o);
+void printMachOUnwindInfo(const object::MachOObjectFile* o);
+void printMachOExportsTrie(const object::MachOObjectFile* o);
+void printMachORebaseTable(const object::MachOObjectFile* o);
+void printMachOBindTable(const object::MachOObjectFile* o);
+void printMachOLazyBindTable(const object::MachOObjectFile* o);
+void printMachOWeakBindTable(const object::MachOObjectFile* o);
 void printELFFileHeader(const object::ObjectFile *o);
 void printCOFFFileHeader(const object::ObjectFile *o);
+void printMachOFileHeader(const object::ObjectFile *o);
+void printExportsTrie(const object::ObjectFile *o);
+void printRebaseTable(const object::ObjectFile *o);
+void printBindTable(const object::ObjectFile *o);
+void printLazyBindTable(const object::ObjectFile *o);
+void printWeakBindTable(const object::ObjectFile *o);
 
 } // end namespace llvm
 
diff --git a/tools/llvm-profdata/CMakeLists.txt b/tools/llvm-profdata/CMakeLists.txt
index 3529114371f1..0e330fd0751e 100644
--- a/tools/llvm-profdata/CMakeLists.txt
+++ b/tools/llvm-profdata/CMakeLists.txt
@@ -1,4 +1,8 @@
-set(LLVM_LINK_COMPONENTS profiledata support)
+set(LLVM_LINK_COMPONENTS
+  Core
+  ProfileData
+  Support
+  )
 
 add_llvm_tool(llvm-profdata
   llvm-profdata.cpp
diff --git a/tools/llvm-profdata/llvm-profdata.cpp b/tools/llvm-profdata/llvm-profdata.cpp
index 49ad37eeed3c..25531c776a31 100644
--- a/tools/llvm-profdata/llvm-profdata.cpp
+++ b/tools/llvm-profdata/llvm-profdata.cpp
@@ -12,8 +12,11 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/ADT/StringRef.h"
+#include "llvm/IR/LLVMContext.h"
 #include "llvm/ProfileData/InstrProfReader.h"
 #include "llvm/ProfileData/InstrProfWriter.h"
+#include "llvm/ProfileData/SampleProfReader.h"
+#include "llvm/ProfileData/SampleProfWriter.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/FileSystem.h"
 #include "llvm/Support/Format.h"
@@ -33,32 +36,24 @@ static void exitWithError(const Twine &Message, StringRef Whence = "") {
   ::exit(1);
 }
 
-int merge_main(int argc, const char *argv[]) {
-  cl::list<std::string> Inputs(cl::Positional, cl::Required, cl::OneOrMore,
-                               cl::desc("<filenames...>"));
-
-  cl::opt<std::string> OutputFilename("output", cl::value_desc("output"),
-                                      cl::init("-"), cl::Required,
-                                      cl::desc("Output file"));
-  cl::alias OutputFilenameA("o", cl::desc("Alias for --output"),
-                            cl::aliasopt(OutputFilename));
-
-  cl::ParseCommandLineOptions(argc, argv, "LLVM profile data merger\n");
+enum ProfileKinds { instr, sample };
 
+void mergeInstrProfile(cl::list<std::string> Inputs, StringRef OutputFilename) {
   if (OutputFilename.compare("-") == 0)
     exitWithError("Cannot write indexed profdata format to stdout.");
 
-  std::string ErrorInfo;
-  raw_fd_ostream Output(OutputFilename.data(), ErrorInfo, sys::fs::F_None);
-  if (!ErrorInfo.empty())
-    exitWithError(ErrorInfo, OutputFilename);
+  std::error_code EC;
+  raw_fd_ostream Output(OutputFilename.data(), EC, sys::fs::F_None);
+  if (EC)
+    exitWithError(EC.message(), OutputFilename);
 
   InstrProfWriter Writer;
   for (const auto &Filename : Inputs) {
-    std::unique_ptr<InstrProfReader> Reader;
-    if (std::error_code ec = InstrProfReader::create(Filename, Reader))
+    auto ReaderOrErr = InstrProfReader::create(Filename);
+    if (std::error_code ec = ReaderOrErr.getError())
       exitWithError(ec.message(), Filename);
 
+    auto Reader = std::move(ReaderOrErr.get());
     for (const auto &I : *Reader)
       if (std::error_code EC =
               Writer.addFunctionCounts(I.Name, I.Hash, I.Counts))
@@ -67,50 +62,86 @@ int merge_main(int argc, const char *argv[]) {
       exitWithError(Reader->getError().message(), Filename);
   }
   Writer.write(Output);
-
-  return 0;
 }
 
-int show_main(int argc, const char *argv[]) {
-  cl::opt<std::string> Filename(cl::Positional, cl::Required,
-                                cl::desc("<profdata-file>"));
+void mergeSampleProfile(cl::list<std::string> Inputs, StringRef OutputFilename,
+                        sampleprof::SampleProfileFormat OutputFormat) {
+  using namespace sampleprof;
+  auto WriterOrErr = SampleProfileWriter::create(OutputFilename, OutputFormat);
+  if (std::error_code EC = WriterOrErr.getError())
+    exitWithError(EC.message(), OutputFilename);
 
-  cl::opt<bool> ShowCounts("counts", cl::init(false),
-                           cl::desc("Show counter values for shown functions"));
-  cl::opt<bool> ShowAllFunctions("all-functions", cl::init(false),
-                                 cl::desc("Details for every function"));
-  cl::opt<std::string> ShowFunction("function",
-                                    cl::desc("Details for matching functions"));
+  auto Writer = std::move(WriterOrErr.get());
+  StringMap<FunctionSamples> ProfileMap;
+  for (const auto &Filename : Inputs) {
+    auto ReaderOrErr =
+        SampleProfileReader::create(Filename, getGlobalContext());
+    if (std::error_code EC = ReaderOrErr.getError())
+      exitWithError(EC.message(), Filename);
+
+    auto Reader = std::move(ReaderOrErr.get());
+    if (std::error_code EC = Reader->read())
+      exitWithError(EC.message(), Filename);
+
+    StringMap<FunctionSamples> &Profiles = Reader->getProfiles();
+    for (StringMap<FunctionSamples>::iterator I = Profiles.begin(),
+                                              E = Profiles.end();
+         I != E; ++I) {
+      StringRef FName = I->first();
+      FunctionSamples &Samples = I->second;
+      ProfileMap[FName].merge(Samples);
+    }
+  }
+  Writer->write(ProfileMap);
+}
+
+int merge_main(int argc, const char *argv[]) {
+  cl::list<std::string> Inputs(cl::Positional, cl::Required, cl::OneOrMore,
+                               cl::desc("<filenames...>"));
 
   cl::opt<std::string> OutputFilename("output", cl::value_desc("output"),
-                                      cl::init("-"),
+                                      cl::init("-"), cl::Required,
                                       cl::desc("Output file"));
   cl::alias OutputFilenameA("o", cl::desc("Alias for --output"),
                             cl::aliasopt(OutputFilename));
+  cl::opt<ProfileKinds> ProfileKind(
+      cl::desc("Profile kind:"), cl::init(instr),
+      cl::values(clEnumVal(instr, "Instrumentation profile (default)"),
+                 clEnumVal(sample, "Sample profile"), clEnumValEnd));
+
+  cl::opt<sampleprof::SampleProfileFormat> OutputFormat(
+      cl::desc("Format of output profile (only meaningful with --sample)"),
+      cl::init(sampleprof::SPF_Binary),
+      cl::values(clEnumValN(sampleprof::SPF_Binary, "binary",
+                            "Binary encoding (default)"),
+                 clEnumValN(sampleprof::SPF_Text, "text", "Text encoding"),
+                 clEnumValN(sampleprof::SPF_GCC, "gcc", "GCC encoding"),
+                 clEnumValEnd));
 
-  cl::ParseCommandLineOptions(argc, argv, "LLVM profile data summary\n");
-
-  std::unique_ptr<InstrProfReader> Reader;
-  if (std::error_code EC = InstrProfReader::create(Filename, Reader))
-    exitWithError(EC.message(), Filename);
+  cl::ParseCommandLineOptions(argc, argv, "LLVM profile data merger\n");
 
-  if (OutputFilename.empty())
-    OutputFilename = "-";
+  if (ProfileKind == instr)
+    mergeInstrProfile(Inputs, OutputFilename);
+  else
+    mergeSampleProfile(Inputs, OutputFilename, OutputFormat);
 
-  std::string ErrorInfo;
-  raw_fd_ostream OS(OutputFilename.data(), ErrorInfo, sys::fs::F_Text);
-  if (!ErrorInfo.empty())
-    exitWithError(ErrorInfo, OutputFilename);
+  return 0;
+}
 
-  if (ShowAllFunctions && !ShowFunction.empty())
-    errs() << "warning: -function argument ignored: showing all functions\n";
+int showInstrProfile(std::string Filename, bool ShowCounts,
+                     bool ShowAllFunctions, std::string ShowFunction,
+                     raw_fd_ostream &OS) {
+  auto ReaderOrErr = InstrProfReader::create(Filename);
+  if (std::error_code EC = ReaderOrErr.getError())
+    exitWithError(EC.message(), Filename);
 
+  auto Reader = std::move(ReaderOrErr.get());
   uint64_t MaxFunctionCount = 0, MaxBlockCount = 0;
   size_t ShownFunctions = 0, TotalFunctions = 0;
   for (const auto &Func : *Reader) {
-    bool Show = ShowAllFunctions ||
-                (!ShowFunction.empty() &&
-                 Func.Name.find(ShowFunction) != Func.Name.npos);
+    bool Show =
+        ShowAllFunctions || (!ShowFunction.empty() &&
+                             Func.Name.find(ShowFunction) != Func.Name.npos);
 
     ++TotalFunctions;
     assert(Func.Counts.size() > 0 && "function missing entry counter");
@@ -150,6 +181,65 @@ int show_main(int argc, const char *argv[]) {
   return 0;
 }
 
+int showSampleProfile(std::string Filename, bool ShowCounts,
+                      bool ShowAllFunctions, std::string ShowFunction,
+                      raw_fd_ostream &OS) {
+  using namespace sampleprof;
+  auto ReaderOrErr = SampleProfileReader::create(Filename, getGlobalContext());
+  if (std::error_code EC = ReaderOrErr.getError())
+    exitWithError(EC.message(), Filename);
+
+  auto Reader = std::move(ReaderOrErr.get());
+  Reader->read();
+  if (ShowAllFunctions || ShowFunction.empty())
+    Reader->dump(OS);
+  else
+    Reader->dumpFunctionProfile(ShowFunction, OS);
+
+  return 0;
+}
+
+int show_main(int argc, const char *argv[]) {
+  cl::opt<std::string> Filename(cl::Positional, cl::Required,
+                                cl::desc("<profdata-file>"));
+
+  cl::opt<bool> ShowCounts("counts", cl::init(false),
+                           cl::desc("Show counter values for shown functions"));
+  cl::opt<bool> ShowAllFunctions("all-functions", cl::init(false),
+                                 cl::desc("Details for every function"));
+  cl::opt<std::string> ShowFunction("function",
+                                    cl::desc("Details for matching functions"));
+
+  cl::opt<std::string> OutputFilename("output", cl::value_desc("output"),
+                                      cl::init("-"), cl::desc("Output file"));
+  cl::alias OutputFilenameA("o", cl::desc("Alias for --output"),
+                            cl::aliasopt(OutputFilename));
+  cl::opt<ProfileKinds> ProfileKind(
+      cl::desc("Profile kind:"), cl::init(instr),
+      cl::values(clEnumVal(instr, "Instrumentation profile (default)"),
+                 clEnumVal(sample, "Sample profile"), clEnumValEnd));
+
+  cl::ParseCommandLineOptions(argc, argv, "LLVM profile data summary\n");
+
+  if (OutputFilename.empty())
+    OutputFilename = "-";
+
+  std::error_code EC;
+  raw_fd_ostream OS(OutputFilename.data(), EC, sys::fs::F_Text);
+  if (EC)
+    exitWithError(EC.message(), OutputFilename);
+
+  if (ShowAllFunctions && !ShowFunction.empty())
+    errs() << "warning: -function argument ignored: showing all functions\n";
+
+  if (ProfileKind == instr)
+    return showInstrProfile(Filename, ShowCounts, ShowAllFunctions,
+                            ShowFunction, OS);
+  else
+    return showSampleProfile(Filename, ShowCounts, ShowAllFunctions,
+                             ShowFunction, OS);
+}
+
 int main(int argc, const char *argv[]) {
   // Print a stack trace if we signal out.
   sys::PrintStackTraceOnErrorSignal();
diff --git a/tools/llvm-readobj/ARMAttributeParser.cpp b/tools/llvm-readobj/ARMAttributeParser.cpp
index d35cd14265fb..e2d71912a21e 100644
--- a/tools/llvm-readobj/ARMAttributeParser.cpp
+++ b/tools/llvm-readobj/ARMAttributeParser.cpp
@@ -141,7 +141,7 @@ void ARMAttributeParser::CPU_arch_profile(AttrType Tag, const uint8_t *Data,
   case 'R': Profile = "Real-time"; break;
   case 'M': Profile = "Microcontroller"; break;
   case 'S': Profile = "Classic"; break;
-  case '0': Profile = "None"; break;
+  case 0: Profile = "None"; break;
   }
 
   PrintAttribute(Tag, Encoded, Profile);
diff --git a/tools/llvm-readobj/ARMAttributeParser.h b/tools/llvm-readobj/ARMAttributeParser.h
index c2862513b751..f924c835d3ea 100644
--- a/tools/llvm-readobj/ARMAttributeParser.h
+++ b/tools/llvm-readobj/ARMAttributeParser.h
@@ -7,8 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_READOBJ_ARMATTRIBUTE_PARSER_H
-#define LLVM_READOBJ_ARMATTRIBUTE_PARSER_H
+#ifndef LLVM_TOOLS_LLVM_READOBJ_ARMATTRIBUTEPARSER_H
+#define LLVM_TOOLS_LLVM_READOBJ_ARMATTRIBUTEPARSER_H
 
 #include "StreamWriter.h"
 #include "llvm/Support/ARMBuildAttributes.h"
diff --git a/tools/llvm-readobj/ARMEHABIPrinter.h b/tools/llvm-readobj/ARMEHABIPrinter.h
index 7608cfbbd8d1..b15421d7571f 100644
--- a/tools/llvm-readobj/ARMEHABIPrinter.h
+++ b/tools/llvm-readobj/ARMEHABIPrinter.h
@@ -7,8 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_READOBJ_ARMEHABI_PRINTER_H
-#define LLVM_READOBJ_ARMEHABI_PRINTER_H
+#ifndef LLVM_TOOLS_LLVM_READOBJ_ARMEHABIPRINTER_H
+#define LLVM_TOOLS_LLVM_READOBJ_ARMEHABIPRINTER_H
 
 #include "Error.h"
 #include "StreamWriter.h"
diff --git a/tools/llvm-readobj/ARMWinEHPrinter.cpp b/tools/llvm-readobj/ARMWinEHPrinter.cpp
index b486e4ad0e51..62252fcda5f9 100644
--- a/tools/llvm-readobj/ARMWinEHPrinter.cpp
+++ b/tools/llvm-readobj/ARMWinEHPrinter.cpp
@@ -64,8 +64,8 @@
 
 #include "ARMWinEHPrinter.h"
 #include "Error.h"
-#include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/StringExtras.h"
 #include "llvm/Support/ARMWinEH.h"
 #include "llvm/Support/Format.h"
 
@@ -186,13 +186,8 @@ void Decoder::printRegisters(const std::pair<uint16_t, uint32_t> &RegisterMask)
 ErrorOr<object::SectionRef>
 Decoder::getSectionContaining(const COFFObjectFile &COFF, uint64_t VA) {
   for (const auto &Section : COFF.sections()) {
-    uint64_t Address;
-    uint64_t Size;
-
-    if (std::error_code EC = Section.getAddress(Address))
-      return EC;
-    if (std::error_code EC = Section.getSize(Size))
-      return EC;
+    uint64_t Address = Section.getAddress();
+    uint64_t Size = Section.getSize();
 
     if (VA >= Address && (VA - Address) <= Size)
       return Section;
@@ -233,7 +228,7 @@ ErrorOr<SymbolRef> Decoder::getRelocatedSymbol(const COFFObjectFile &,
   return readobj_error::unknown_symbol;
 }
 
-bool Decoder::opcode_0xxxxxxx(const ulittle8_t *OC, unsigned &Offset,
+bool Decoder::opcode_0xxxxxxx(const uint8_t *OC, unsigned &Offset,
                               unsigned Length, bool Prologue) {
   uint8_t Imm = OC[Offset] & 0x7f;
   SW.startLine() << format("0x%02x                ; %s sp, #(%u * 4)\n",
@@ -244,7 +239,7 @@ bool Decoder::opcode_0xxxxxxx(const ulittle8_t *OC, unsigned &Offset,
   return false;
 }
 
-bool Decoder::opcode_10Lxxxxx(const ulittle8_t *OC, unsigned &Offset,
+bool Decoder::opcode_10Lxxxxx(const uint8_t *OC, unsigned &Offset,
                               unsigned Length, bool Prologue) {
   unsigned Link = (OC[Offset] & 0x20) >> 5;
   uint16_t RegisterMask = (Link << (Prologue ? 14 : 15))
@@ -263,7 +258,7 @@ bool Decoder::opcode_10Lxxxxx(const ulittle8_t *OC, unsigned &Offset,
   return false;
 }
 
-bool Decoder::opcode_1100xxxx(const ulittle8_t *OC, unsigned &Offset,
+bool Decoder::opcode_1100xxxx(const uint8_t *OC, unsigned &Offset,
                               unsigned Length, bool Prologue) {
   if (Prologue)
     SW.startLine() << format("0x%02x                ; mov r%u, sp\n",
@@ -275,7 +270,7 @@ bool Decoder::opcode_1100xxxx(const ulittle8_t *OC, unsigned &Offset,
   return false;
 }
 
-bool Decoder::opcode_11010Lxx(const ulittle8_t *OC, unsigned &Offset,
+bool Decoder::opcode_11010Lxx(const uint8_t *OC, unsigned &Offset,
                               unsigned Length, bool Prologue) {
   unsigned Link = (OC[Offset] & 0x4) >> 3;
   unsigned Count = (OC[Offset] & 0x3);
@@ -292,7 +287,7 @@ bool Decoder::opcode_11010Lxx(const ulittle8_t *OC, unsigned &Offset,
   return false;
 }
 
-bool Decoder::opcode_11011Lxx(const ulittle8_t *OC, unsigned &Offset,
+bool Decoder::opcode_11011Lxx(const uint8_t *OC, unsigned &Offset,
                               unsigned Length, bool Prologue) {
   unsigned Link = (OC[Offset] & 0x4) >> 2;
   unsigned Count = (OC[Offset] & 0x3) + 4;
@@ -309,7 +304,7 @@ bool Decoder::opcode_11011Lxx(const ulittle8_t *OC, unsigned &Offset,
   return false;
 }
 
-bool Decoder::opcode_11100xxx(const ulittle8_t *OC, unsigned &Offset,
+bool Decoder::opcode_11100xxx(const uint8_t *OC, unsigned &Offset,
                               unsigned Length, bool Prologue) {
   unsigned High = (OC[Offset] & 0x7);
   uint32_t VFPMask = (((1 << (High + 1)) - 1) << 8);
@@ -323,7 +318,7 @@ bool Decoder::opcode_11100xxx(const ulittle8_t *OC, unsigned &Offset,
   return false;
 }
 
-bool Decoder::opcode_111010xx(const ulittle8_t *OC, unsigned &Offset,
+bool Decoder::opcode_111010xx(const uint8_t *OC, unsigned &Offset,
                               unsigned Length, bool Prologue) {
   uint16_t Imm = ((OC[Offset + 0] & 0x03) << 8) | ((OC[Offset + 1] & 0xff) << 0);
 
@@ -336,7 +331,7 @@ bool Decoder::opcode_111010xx(const ulittle8_t *OC, unsigned &Offset,
   return false;
 }
 
-bool Decoder::opcode_1110110L(const ulittle8_t *OC, unsigned &Offset,
+bool Decoder::opcode_1110110L(const uint8_t *OC, unsigned &Offset,
                               unsigned Length, bool Prologue) {
   uint8_t GPRMask = ((OC[Offset + 0] & 0x01) << (Prologue ? 14 : 15))
                   | ((OC[Offset + 1] & 0xff) << 0);
@@ -350,7 +345,7 @@ bool Decoder::opcode_1110110L(const ulittle8_t *OC, unsigned &Offset,
   return false;
 }
 
-bool Decoder::opcode_11101110(const ulittle8_t *OC, unsigned &Offset,
+bool Decoder::opcode_11101110(const uint8_t *OC, unsigned &Offset,
                               unsigned Length, bool Prologue) {
   assert(!Prologue && "may not be used in prologue");
 
@@ -366,7 +361,7 @@ bool Decoder::opcode_11101110(const ulittle8_t *OC, unsigned &Offset,
   return false;
 }
 
-bool Decoder::opcode_11101111(const ulittle8_t *OC, unsigned &Offset,
+bool Decoder::opcode_11101111(const uint8_t *OC, unsigned &Offset,
                               unsigned Length, bool Prologue) {
   assert(!Prologue && "may not be used in prologue");
 
@@ -382,7 +377,7 @@ bool Decoder::opcode_11101111(const ulittle8_t *OC, unsigned &Offset,
   return false;
 }
 
-bool Decoder::opcode_11110101(const ulittle8_t *OC, unsigned &Offset,
+bool Decoder::opcode_11110101(const uint8_t *OC, unsigned &Offset,
                               unsigned Length, bool Prologue) {
   unsigned Start = (OC[Offset + 1] & 0xf0) >> 4;
   unsigned End = (OC[Offset + 1] & 0x0f) >> 0;
@@ -397,7 +392,7 @@ bool Decoder::opcode_11110101(const ulittle8_t *OC, unsigned &Offset,
   return false;
 }
 
-bool Decoder::opcode_11110110(const ulittle8_t *OC, unsigned &Offset,
+bool Decoder::opcode_11110110(const uint8_t *OC, unsigned &Offset,
                               unsigned Length, bool Prologue) {
   unsigned Start = (OC[Offset + 1] & 0xf0) >> 4;
   unsigned End = (OC[Offset + 1] & 0x0f) >> 0;
@@ -412,7 +407,7 @@ bool Decoder::opcode_11110110(const ulittle8_t *OC, unsigned &Offset,
   return false;
 }
 
-bool Decoder::opcode_11110111(const ulittle8_t *OC, unsigned &Offset,
+bool Decoder::opcode_11110111(const uint8_t *OC, unsigned &Offset,
                               unsigned Length, bool Prologue) {
   uint32_t Imm = (OC[Offset + 1] << 8) | (OC[Offset + 2] << 0);
 
@@ -425,7 +420,7 @@ bool Decoder::opcode_11110111(const ulittle8_t *OC, unsigned &Offset,
   return false;
 }
 
-bool Decoder::opcode_11111000(const ulittle8_t *OC, unsigned &Offset,
+bool Decoder::opcode_11111000(const uint8_t *OC, unsigned &Offset,
                               unsigned Length, bool Prologue) {
   uint32_t Imm = (OC[Offset + 1] << 16)
                | (OC[Offset + 2] << 8)
@@ -440,7 +435,7 @@ bool Decoder::opcode_11111000(const ulittle8_t *OC, unsigned &Offset,
   return false;
 }
 
-bool Decoder::opcode_11111001(const ulittle8_t *OC, unsigned &Offset,
+bool Decoder::opcode_11111001(const uint8_t *OC, unsigned &Offset,
                               unsigned Length, bool Prologue) {
   uint32_t Imm = (OC[Offset + 1] << 8) | (OC[Offset + 2] << 0);
 
@@ -453,7 +448,7 @@ bool Decoder::opcode_11111001(const ulittle8_t *OC, unsigned &Offset,
   return false;
 }
 
-bool Decoder::opcode_11111010(const ulittle8_t *OC, unsigned &Offset,
+bool Decoder::opcode_11111010(const uint8_t *OC, unsigned &Offset,
                               unsigned Length, bool Prologue) {
   uint32_t Imm = (OC[Offset + 1] << 16)
                | (OC[Offset + 2] << 8)
@@ -468,41 +463,41 @@ bool Decoder::opcode_11111010(const ulittle8_t *OC, unsigned &Offset,
   return false;
 }
 
-bool Decoder::opcode_11111011(const ulittle8_t *OC, unsigned &Offset,
+bool Decoder::opcode_11111011(const uint8_t *OC, unsigned &Offset,
                               unsigned Length, bool Prologue) {
   SW.startLine() << format("0x%02x                ; nop\n", OC[Offset]);
   ++Offset;
   return false;
 }
 
-bool Decoder::opcode_11111100(const ulittle8_t *OC, unsigned &Offset,
+bool Decoder::opcode_11111100(const uint8_t *OC, unsigned &Offset,
                               unsigned Length, bool Prologue) {
   SW.startLine() << format("0x%02x                ; nop.w\n", OC[Offset]);
   ++Offset;
   return false;
 }
 
-bool Decoder::opcode_11111101(const ulittle8_t *OC, unsigned &Offset,
+bool Decoder::opcode_11111101(const uint8_t *OC, unsigned &Offset,
                               unsigned Length, bool Prologue) {
   SW.startLine() << format("0x%02x                ; b\n", OC[Offset]);
   ++Offset;
   return true;
 }
 
-bool Decoder::opcode_11111110(const ulittle8_t *OC, unsigned &Offset,
+bool Decoder::opcode_11111110(const uint8_t *OC, unsigned &Offset,
                               unsigned Length, bool Prologue) {
   SW.startLine() << format("0x%02x                ; b.w\n", OC[Offset]);
   ++Offset;
   return true;
 }
 
-bool Decoder::opcode_11111111(const ulittle8_t *OC, unsigned &Offset,
+bool Decoder::opcode_11111111(const uint8_t *OC, unsigned &Offset,
                               unsigned Length, bool Prologue) {
   ++Offset;
   return true;
 }
 
-void Decoder::decodeOpcodes(ArrayRef<ulittle8_t> Opcodes, unsigned Offset,
+void Decoder::decodeOpcodes(ArrayRef<uint8_t> Opcodes, unsigned Offset,
                             bool Prologue) {
   assert((!Prologue || Offset == 0) && "prologue should always use offset 0");
 
@@ -525,10 +520,7 @@ bool Decoder::dumpXDataRecord(const COFFObjectFile &COFF,
   if (COFF.getSectionContents(COFF.getCOFFSection(Section), Contents))
     return false;
 
-  uint64_t SectionVA;
-  if (Section.getAddress(SectionVA))
-    return false;
-
+  uint64_t SectionVA = Section.getAddress();
   uint64_t Offset = VA - SectionVA;
   const ulittle32_t *Data =
     reinterpret_cast<const ulittle32_t *>(Contents.data() + Offset);
@@ -546,7 +538,7 @@ bool Decoder::dumpXDataRecord(const COFFObjectFile &COFF,
                  static_cast<uint64_t>(XData.CodeWords() * sizeof(uint32_t)));
 
   if (XData.E()) {
-    ArrayRef<ulittle8_t> UC = XData.UnwindByteCode();
+    ArrayRef<uint8_t> UC = XData.UnwindByteCode();
     if (!XData.F()) {
       ListScope PS(SW, "Prologue");
       decodeOpcodes(UC, 0, /*Prologue=*/true);
@@ -741,4 +733,3 @@ std::error_code Decoder::dumpProcedureData(const COFFObjectFile &COFF) {
 }
 }
 }
-
diff --git a/tools/llvm-readobj/ARMWinEHPrinter.h b/tools/llvm-readobj/ARMWinEHPrinter.h
index 740c8b5841b5..274ef114841c 100644
--- a/tools/llvm-readobj/ARMWinEHPrinter.h
+++ b/tools/llvm-readobj/ARMWinEHPrinter.h
@@ -7,8 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_READOBJ_ARMWINEHPRINTER_H
-#define LLVM_READOBJ_ARMWINEHPRINTER_H
+#ifndef LLVM_TOOLS_LLVM_READOBJ_ARMWINEHPRINTER_H
+#define LLVM_TOOLS_LLVM_READOBJ_ARMWINEHPRINTER_H
 
 #include "StreamWriter.h"
 #include "llvm/Object/COFF.h"
@@ -28,55 +28,54 @@ class Decoder {
   struct RingEntry {
     uint8_t Mask;
     uint8_t Value;
-    bool (Decoder::*Routine)(const support::ulittle8_t *, unsigned &, unsigned,
-                             bool);
+    bool (Decoder::*Routine)(const uint8_t *, unsigned &, unsigned, bool);
   };
   static const RingEntry Ring[];
 
-  bool opcode_0xxxxxxx(const support::ulittle8_t *Opcodes, unsigned &Offset,
+  bool opcode_0xxxxxxx(const uint8_t *Opcodes, unsigned &Offset,
                        unsigned Length, bool Prologue);
-  bool opcode_10Lxxxxx(const support::ulittle8_t *Opcodes, unsigned &Offset,
+  bool opcode_10Lxxxxx(const uint8_t *Opcodes, unsigned &Offset,
                        unsigned Length, bool Prologue);
-  bool opcode_1100xxxx(const support::ulittle8_t *Opcodes, unsigned &Offset,
+  bool opcode_1100xxxx(const uint8_t *Opcodes, unsigned &Offset,
                        unsigned Length, bool Prologue);
-  bool opcode_11010Lxx(const support::ulittle8_t *Opcodes, unsigned &Offset,
+  bool opcode_11010Lxx(const uint8_t *Opcodes, unsigned &Offset,
                        unsigned Length, bool Prologue);
-  bool opcode_11011Lxx(const support::ulittle8_t *Opcodes, unsigned &Offset,
+  bool opcode_11011Lxx(const uint8_t *Opcodes, unsigned &Offset,
                        unsigned Length, bool Prologue);
-  bool opcode_11100xxx(const support::ulittle8_t *Opcodes, unsigned &Offset,
+  bool opcode_11100xxx(const uint8_t *Opcodes, unsigned &Offset,
                        unsigned Length, bool Prologue);
-  bool opcode_111010xx(const support::ulittle8_t *Opcodes, unsigned &Offset,
+  bool opcode_111010xx(const uint8_t *Opcodes, unsigned &Offset,
                        unsigned Length, bool Prologue);
-  bool opcode_1110110L(const support::ulittle8_t *Opcodes, unsigned &Offset,
+  bool opcode_1110110L(const uint8_t *Opcodes, unsigned &Offset,
                        unsigned Length, bool Prologue);
-  bool opcode_11101110(const support::ulittle8_t *Opcodes, unsigned &Offset,
+  bool opcode_11101110(const uint8_t *Opcodes, unsigned &Offset,
                        unsigned Length, bool Prologue);
-  bool opcode_11101111(const support::ulittle8_t *Opcodes, unsigned &Offset,
+  bool opcode_11101111(const uint8_t *Opcodes, unsigned &Offset,
                        unsigned Length, bool Prologue);
-  bool opcode_11110101(const support::ulittle8_t *Opcodes, unsigned &Offset,
+  bool opcode_11110101(const uint8_t *Opcodes, unsigned &Offset,
                        unsigned Length, bool Prologue);
-  bool opcode_11110110(const support::ulittle8_t *Opcodes, unsigned &Offset,
+  bool opcode_11110110(const uint8_t *Opcodes, unsigned &Offset,
                        unsigned Length, bool Prologue);
-  bool opcode_11110111(const support::ulittle8_t *Opcodes, unsigned &Offset,
+  bool opcode_11110111(const uint8_t *Opcodes, unsigned &Offset,
                        unsigned Length, bool Prologue);
-  bool opcode_11111000(const support::ulittle8_t *Opcodes, unsigned &Offset,
+  bool opcode_11111000(const uint8_t *Opcodes, unsigned &Offset,
                        unsigned Length, bool Prologue);
-  bool opcode_11111001(const support::ulittle8_t *Opcodes, unsigned &Offset,
+  bool opcode_11111001(const uint8_t *Opcodes, unsigned &Offset,
                        unsigned Length, bool Prologue);
-  bool opcode_11111010(const support::ulittle8_t *Opcodes, unsigned &Offset,
+  bool opcode_11111010(const uint8_t *Opcodes, unsigned &Offset,
                        unsigned Length, bool Prologue);
-  bool opcode_11111011(const support::ulittle8_t *Opcodes, unsigned &Offset,
+  bool opcode_11111011(const uint8_t *Opcodes, unsigned &Offset,
                        unsigned Length, bool Prologue);
-  bool opcode_11111100(const support::ulittle8_t *Opcodes, unsigned &Offset,
+  bool opcode_11111100(const uint8_t *Opcodes, unsigned &Offset,
                        unsigned Length, bool Prologue);
-  bool opcode_11111101(const support::ulittle8_t *Opcodes, unsigned &Offset,
+  bool opcode_11111101(const uint8_t *Opcodes, unsigned &Offset,
                        unsigned Length, bool Prologue);
-  bool opcode_11111110(const support::ulittle8_t *Opcodes, unsigned &Offset,
+  bool opcode_11111110(const uint8_t *Opcodes, unsigned &Offset,
                        unsigned Length, bool Prologue);
-  bool opcode_11111111(const support::ulittle8_t *Opcodes, unsigned &Offset,
+  bool opcode_11111111(const uint8_t *Opcodes, unsigned &Offset,
                        unsigned Length, bool Prologue);
 
-  void decodeOpcodes(ArrayRef<support::ulittle8_t> Opcodes, unsigned Offset,
+  void decodeOpcodes(ArrayRef<uint8_t> Opcodes, unsigned Offset,
                      bool Prologue);
 
   void printRegisters(const std::pair<uint16_t, uint32_t> &RegisterMask);
@@ -116,4 +115,3 @@ public:
 }
 
 #endif
-
diff --git a/tools/llvm-readobj/COFFDumper.cpp b/tools/llvm-readobj/COFFDumper.cpp
index 7842cd4d44fe..156e39a35fd5 100644
--- a/tools/llvm-readobj/COFFDumper.cpp
+++ b/tools/llvm-readobj/COFFDumper.cpp
@@ -20,6 +20,7 @@
 #include "Win64EHDumper.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/StringExtras.h"
 #include "llvm/Object/COFF.h"
 #include "llvm/Object/ObjectFile.h"
 #include "llvm/Support/COFF.h"
@@ -49,35 +50,50 @@ public:
     cacheRelocations();
   }
 
-  virtual void printFileHeaders() override;
-  virtual void printSections() override;
-  virtual void printRelocations() override;
-  virtual void printSymbols() override;
-  virtual void printDynamicSymbols() override;
-  virtual void printUnwindInfo() override;
+  void printFileHeaders() override;
+  void printSections() override;
+  void printRelocations() override;
+  void printSymbols() override;
+  void printDynamicSymbols() override;
+  void printUnwindInfo() override;
+  void printCOFFImports() override;
+  void printCOFFExports() override;
+  void printCOFFDirectives() override;
+  void printCOFFBaseReloc() override;
 
 private:
   void printSymbol(const SymbolRef &Sym);
   void printRelocation(const SectionRef &Section, const RelocationRef &Reloc);
   void printDataDirectory(uint32_t Index, const std::string &FieldName);
 
+  void printDOSHeader(const dos_header *DH);
   template <class PEHeader> void printPEHeader(const PEHeader *Hdr);
   void printBaseOfDataField(const pe32_header *Hdr);
   void printBaseOfDataField(const pe32plus_header *Hdr);
 
   void printCodeViewLineTables(const SectionRef &Section);
 
+  void printCodeViewSymbolsSubsection(StringRef Subsection,
+                                      const SectionRef &Section,
+                                      uint32_t Offset);
+
   void cacheRelocations();
 
   std::error_code resolveSymbol(const coff_section *Section, uint64_t Offset,
                                 SymbolRef &Sym);
   std::error_code resolveSymbolName(const coff_section *Section,
                                     uint64_t Offset, StringRef &Name);
+  void printImportedSymbols(iterator_range<imported_symbol_iterator> Range);
+  void printDelayImportedSymbols(
+      const DelayImportDirectoryEntryRef &I,
+      iterator_range<imported_symbol_iterator> Range);
 
   typedef DenseMap<const coff_section*, std::vector<RelocationRef> > RelocMapTy;
 
   const llvm::object::COFFObjectFile *Obj;
   RelocMapTy RelocMap;
+  StringRef CVFileIndexToStringOffsetTable;
+  StringRef CVStringTable;
 };
 
 } // namespace
@@ -313,9 +329,10 @@ WeakExternalCharacteristics[] = {
 
 template <typename T>
 static std::error_code getSymbolAuxData(const COFFObjectFile *Obj,
-                                        const coff_symbol *Symbol,
-                                        const T *&Aux) {
+                                        COFFSymbolRef Symbol,
+                                        uint8_t AuxSymbolIdx, const T *&Aux) {
   ArrayRef<uint8_t> AuxData = Obj->getSymbolAuxData(Symbol);
+  AuxData = AuxData.slice(AuxSymbolIdx * Obj->getSymbolTableEntrySize());
   Aux = reinterpret_cast<const T*>(AuxData.data());
   return readobj_error::success;
 }
@@ -342,25 +359,20 @@ void COFFDumper::printDataDirectory(uint32_t Index, const std::string &FieldName
 }
 
 void COFFDumper::printFileHeaders() {
-  // Print COFF header
-  const coff_file_header *COFFHeader = nullptr;
-  if (error(Obj->getCOFFHeader(COFFHeader)))
-    return;
-
-  time_t TDS = COFFHeader->TimeDateStamp;
+  time_t TDS = Obj->getTimeDateStamp();
   char FormattedTime[20] = { };
   strftime(FormattedTime, 20, "%Y-%m-%d %H:%M:%S", gmtime(&TDS));
 
   {
     DictScope D(W, "ImageFileHeader");
-    W.printEnum  ("Machine", COFFHeader->Machine,
+    W.printEnum  ("Machine", Obj->getMachine(),
                     makeArrayRef(ImageFileMachineType));
-    W.printNumber("SectionCount", COFFHeader->NumberOfSections);
-    W.printHex   ("TimeDateStamp", FormattedTime, COFFHeader->TimeDateStamp);
-    W.printHex   ("PointerToSymbolTable", COFFHeader->PointerToSymbolTable);
-    W.printNumber("SymbolCount", COFFHeader->NumberOfSymbols);
-    W.printNumber("OptionalHeaderSize", COFFHeader->SizeOfOptionalHeader);
-    W.printFlags ("Characteristics", COFFHeader->Characteristics,
+    W.printNumber("SectionCount", Obj->getNumberOfSections());
+    W.printHex   ("TimeDateStamp", FormattedTime, Obj->getTimeDateStamp());
+    W.printHex   ("PointerToSymbolTable", Obj->getPointerToSymbolTable());
+    W.printNumber("SymbolCount", Obj->getNumberOfSymbols());
+    W.printNumber("OptionalHeaderSize", Obj->getSizeOfOptionalHeader());
+    W.printFlags ("Characteristics", Obj->getCharacteristics(),
                     makeArrayRef(ImageFileCharacteristics));
   }
 
@@ -377,6 +389,30 @@ void COFFDumper::printFileHeaders() {
     return;
   if (PEPlusHeader)
     printPEHeader<pe32plus_header>(PEPlusHeader);
+
+  if (const dos_header *DH = Obj->getDOSHeader())
+    printDOSHeader(DH);
+}
+
+void COFFDumper::printDOSHeader(const dos_header *DH) {
+  DictScope D(W, "DOSHeader");
+  W.printString("Magic", StringRef(DH->Magic, sizeof(DH->Magic)));
+  W.printNumber("UsedBytesInTheLastPage", DH->UsedBytesInTheLastPage);
+  W.printNumber("FileSizeInPages", DH->FileSizeInPages);
+  W.printNumber("NumberOfRelocationItems", DH->NumberOfRelocationItems);
+  W.printNumber("HeaderSizeInParagraphs", DH->HeaderSizeInParagraphs);
+  W.printNumber("MinimumExtraParagraphs", DH->MinimumExtraParagraphs);
+  W.printNumber("MaximumExtraParagraphs", DH->MaximumExtraParagraphs);
+  W.printNumber("InitialRelativeSS", DH->InitialRelativeSS);
+  W.printNumber("InitialSP", DH->InitialSP);
+  W.printNumber("Checksum", DH->Checksum);
+  W.printNumber("InitialIP", DH->InitialIP);
+  W.printNumber("InitialRelativeCS", DH->InitialRelativeCS);
+  W.printNumber("AddressOfRelocationTable", DH->AddressOfRelocationTable);
+  W.printNumber("OverlayNumber", DH->OverlayNumber);
+  W.printNumber("OEMid", DH->OEMid);
+  W.printNumber("OEMinfo", DH->OEMinfo);
+  W.printNumber("AddressOfNewExeHeader", DH->AddressOfNewExeHeader);
 }
 
 template <class PEHeader>
@@ -404,7 +440,7 @@ void COFFDumper::printPEHeader(const PEHeader *Hdr) {
   W.printNumber("SizeOfImage", Hdr->SizeOfImage);
   W.printNumber("SizeOfHeaders", Hdr->SizeOfHeaders);
   W.printEnum  ("Subsystem", Hdr->Subsystem, makeArrayRef(PEWindowsSubsystem));
-  W.printFlags ("Subsystem", Hdr->DLLCharacteristics,
+  W.printFlags ("Characteristics", Hdr->DLLCharacteristics,
                 makeArrayRef(PEDLLCharacteristics));
   W.printNumber("SizeOfStackReserve", Hdr->SizeOfStackReserve);
   W.printNumber("SizeOfStackCommit", Hdr->SizeOfStackCommit);
@@ -440,11 +476,10 @@ void COFFDumper::printCodeViewLineTables(const SectionRef &Section) {
 
   SmallVector<StringRef, 10> FunctionNames;
   StringMap<StringRef> FunctionLineTables;
-  StringRef FileIndexToStringOffsetTable;
-  StringRef StringTable;
 
   ListScope D(W, "CodeViewLineTables");
   {
+    // FIXME: Add more offset correctness checks.
     DataExtractor DE(Data, true, 4);
     uint32_t Offset = 0,
              Magic = DE.getU32(&Offset);
@@ -474,6 +509,9 @@ void COFFDumper::printCodeViewLineTables(const SectionRef &Section) {
       W.printBinaryBlock("Contents", Contents);
 
       switch (SubSectionType) {
+      case COFF::DEBUG_SYMBOL_SUBSECTION:
+        printCodeViewSymbolsSubsection(Contents, Section, Offset);
+        break;
       case COFF::DEBUG_LINE_TABLE_SUBSECTION: {
         // Holds a PC to file:line table.  Some data to parse this subsection is
         // stored in the other subsections, so just check sanity and store the
@@ -502,25 +540,25 @@ void COFFDumper::printCodeViewLineTables(const SectionRef &Section) {
         break;
       }
       case COFF::DEBUG_STRING_TABLE_SUBSECTION:
-        if (PayloadSize == 0 || StringTable.data() != nullptr ||
+        if (PayloadSize == 0 || CVStringTable.data() != nullptr ||
             Contents.back() != '\0') {
           // Empty or duplicate or non-null-terminated subsection.
           error(object_error::parse_failed);
           return;
         }
-        StringTable = Contents;
+        CVStringTable = Contents;
         break;
       case COFF::DEBUG_INDEX_SUBSECTION:
         // Holds the translation table from file indices
         // to offsets in the string table.
 
         if (PayloadSize == 0 ||
-            FileIndexToStringOffsetTable.data() != nullptr) {
+            CVFileIndexToStringOffsetTable.data() != nullptr) {
           // Empty or duplicate subsection.
           error(object_error::parse_failed);
           return;
         }
-        FileIndexToStringOffsetTable = Contents;
+        CVFileIndexToStringOffsetTable = Contents;
         break;
       }
       Offset += PayloadSize;
@@ -555,7 +593,7 @@ void COFFDumper::printCodeViewLineTables(const SectionRef &Section) {
 
       uint32_t FilenameOffset;
       {
-        DataExtractor SDE(FileIndexToStringOffsetTable, true, 4);
+        DataExtractor SDE(CVFileIndexToStringOffsetTable, true, 4);
         uint32_t OffsetInSDE = OffsetInIndex;
         if (!SDE.isValidOffset(OffsetInSDE)) {
           error(object_error::parse_failed);
@@ -564,15 +602,15 @@ void COFFDumper::printCodeViewLineTables(const SectionRef &Section) {
         FilenameOffset = SDE.getU32(&OffsetInSDE);
       }
 
-      if (FilenameOffset == 0 || FilenameOffset + 1 >= StringTable.size() ||
-          StringTable.data()[FilenameOffset - 1] != '\0') {
+      if (FilenameOffset == 0 || FilenameOffset + 1 >= CVStringTable.size() ||
+          CVStringTable.data()[FilenameOffset - 1] != '\0') {
         // Each string in an F3 subsection should be preceded by a null
         // character.
         error(object_error::parse_failed);
         return;
       }
 
-      StringRef Filename(StringTable.data() + FilenameOffset);
+      StringRef Filename(CVStringTable.data() + FilenameOffset);
       ListScope S(W, "FilenameSegment");
       W.printString("Filename", Filename);
       for (unsigned J = 0; J != SegmentLength && DE.isValidOffset(Offset);
@@ -593,6 +631,80 @@ void COFFDumper::printCodeViewLineTables(const SectionRef &Section) {
   }
 }
 
+void COFFDumper::printCodeViewSymbolsSubsection(StringRef Subsection,
+                                                const SectionRef &Section,
+                                                uint32_t OffsetInSection) {
+  if (Subsection.size() == 0) {
+    error(object_error::parse_failed);
+    return;
+  }
+  DataExtractor DE(Subsection, true, 4);
+  uint32_t Offset = 0;
+
+  // Function-level subsections have "procedure start" and "procedure end"
+  // commands that should come in pairs and surround relevant info.
+  bool InFunctionScope = false;
+  while (DE.isValidOffset(Offset)) {
+    // Read subsection segments one by one.
+    uint16_t Size = DE.getU16(&Offset);
+    // The section size includes the size of the type identifier.
+    if (Size < 2 || !DE.isValidOffsetForDataOfSize(Offset, Size)) {
+      error(object_error::parse_failed);
+      return;
+    }
+    Size -= 2;
+    uint16_t Type = DE.getU16(&Offset);
+    switch (Type) {
+    case COFF::DEBUG_SYMBOL_TYPE_PROC_START: {
+      DictScope S(W, "ProcStart");
+      if (InFunctionScope || Size < 36) {
+        error(object_error::parse_failed);
+        return;
+      }
+      InFunctionScope = true;
+
+      // We're currently interested in a limited subset of fields in this
+      // segment, just ignore the rest of the fields for now.
+      uint8_t Unused[12];
+      DE.getU8(&Offset, Unused, 12);
+      uint32_t CodeSize = DE.getU32(&Offset);
+      DE.getU8(&Offset, Unused, 12);
+      StringRef SectionName;
+      if (error(resolveSymbolName(Obj->getCOFFSection(Section),
+                                  OffsetInSection + Offset, SectionName)))
+        return;
+      Offset += 4;
+      DE.getU8(&Offset, Unused, 3);
+      StringRef DisplayName = DE.getCStr(&Offset);
+      if (!DE.isValidOffset(Offset)) {
+        error(object_error::parse_failed);
+        return;
+      }
+      W.printString("DisplayName", DisplayName);
+      W.printString("Section", SectionName);
+      W.printHex("CodeSize", CodeSize);
+
+      break;
+    }
+    case COFF::DEBUG_SYMBOL_TYPE_PROC_END: {
+      W.startLine() << "ProcEnd\n";
+      if (!InFunctionScope || Size > 0) {
+        error(object_error::parse_failed);
+        return;
+      }
+      InFunctionScope = false;
+      break;
+    }
+    default:
+      Offset += Size;
+      break;
+    }
+  }
+
+  if (InFunctionScope)
+    error(object_error::parse_failed);
+}
+
 void COFFDumper::printSections() {
   ListScope SectionsD(W, "Sections");
   int SectionNumber = 0;
@@ -628,8 +740,7 @@ void COFFDumper::printSections() {
     if (opts::SectionSymbols) {
       ListScope D(W, "Symbols");
       for (const SymbolRef &Symbol : Obj->symbols()) {
-        bool Contained = false;
-        if (Sec.containsSymbol(Symbol, Contained) || !Contained)
+        if (!Sec.containsSymbol(Symbol))
           continue;
 
         printSymbol(Symbol);
@@ -639,7 +750,8 @@ void COFFDumper::printSections() {
     if (Name == ".debug$S" && opts::CodeViewLineTables)
       printCodeViewLineTables(Sec);
 
-    if (opts::SectionData) {
+    if (opts::SectionData &&
+        !(Section->Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA)) {
       StringRef Data;
       if (error(Sec.getContents(Data)))
         break;
@@ -683,7 +795,6 @@ void COFFDumper::printRelocation(const SectionRef &Section,
   uint64_t RelocType;
   SmallString<32> RelocName;
   StringRef SymbolName;
-  StringRef Contents;
   if (error(Reloc.getOffset(Offset)))
     return;
   if (error(Reloc.getType(RelocType)))
@@ -691,21 +802,19 @@ void COFFDumper::printRelocation(const SectionRef &Section,
   if (error(Reloc.getTypeName(RelocName)))
     return;
   symbol_iterator Symbol = Reloc.getSymbol();
-  if (error(Symbol->getName(SymbolName)))
-    return;
-  if (error(Section.getContents(Contents)))
+  if (Symbol != Obj->symbol_end() && error(Symbol->getName(SymbolName)))
     return;
 
   if (opts::ExpandRelocs) {
     DictScope Group(W, "Relocation");
     W.printHex("Offset", Offset);
     W.printNumber("Type", RelocName, RelocType);
-    W.printString("Symbol", SymbolName.size() > 0 ? SymbolName : "-");
+    W.printString("Symbol", SymbolName.empty() ? "-" : SymbolName);
   } else {
     raw_ostream& OS = W.startLine();
     OS << W.hex(Offset)
        << " " << RelocName
-       << " " << (SymbolName.size() > 0 ? SymbolName : "-")
+       << " " << (SymbolName.empty() ? "-" : SymbolName)
        << "\n";
   }
 }
@@ -719,12 +828,30 @@ void COFFDumper::printSymbols() {
 
 void COFFDumper::printDynamicSymbols() { ListScope Group(W, "DynamicSymbols"); }
 
+static ErrorOr<StringRef>
+getSectionName(const llvm::object::COFFObjectFile *Obj, int32_t SectionNumber,
+               const coff_section *Section) {
+  if (Section) {
+    StringRef SectionName;
+    if (std::error_code EC = Obj->getSectionName(Section, SectionName))
+      return EC;
+    return SectionName;
+  }
+  if (SectionNumber == llvm::COFF::IMAGE_SYM_DEBUG)
+    return StringRef("IMAGE_SYM_DEBUG");
+  if (SectionNumber == llvm::COFF::IMAGE_SYM_ABSOLUTE)
+    return StringRef("IMAGE_SYM_ABSOLUTE");
+  if (SectionNumber == llvm::COFF::IMAGE_SYM_UNDEFINED)
+    return StringRef("IMAGE_SYM_UNDEFINED");
+  return StringRef("");
+}
+
 void COFFDumper::printSymbol(const SymbolRef &Sym) {
   DictScope D(W, "Symbol");
 
-  const coff_symbol *Symbol = Obj->getCOFFSymbol(Sym);
+  COFFSymbolRef Symbol = Obj->getCOFFSymbol(Sym);
   const coff_section *Section;
-  if (std::error_code EC = Obj->getSection(Symbol->SectionNumber, Section)) {
+  if (std::error_code EC = Obj->getSection(Symbol.getSectionNumber(), Section)) {
     W.startLine() << "Invalid section number: " << EC.message() << "\n";
     W.flush();
     return;
@@ -735,23 +862,25 @@ void COFFDumper::printSymbol(const SymbolRef &Sym) {
     SymbolName = "";
 
   StringRef SectionName = "";
-  if (Section)
-    Obj->getSectionName(Section, SectionName);
+  ErrorOr<StringRef> Res =
+      getSectionName(Obj, Symbol.getSectionNumber(), Section);
+  if (Res)
+    SectionName = *Res;
 
   W.printString("Name", SymbolName);
-  W.printNumber("Value", Symbol->Value);
-  W.printNumber("Section", SectionName, Symbol->SectionNumber);
-  W.printEnum  ("BaseType", Symbol->getBaseType(), makeArrayRef(ImageSymType));
-  W.printEnum  ("ComplexType", Symbol->getComplexType(),
+  W.printNumber("Value", Symbol.getValue());
+  W.printNumber("Section", SectionName, Symbol.getSectionNumber());
+  W.printEnum  ("BaseType", Symbol.getBaseType(), makeArrayRef(ImageSymType));
+  W.printEnum  ("ComplexType", Symbol.getComplexType(),
                                                    makeArrayRef(ImageSymDType));
-  W.printEnum  ("StorageClass", Symbol->StorageClass,
+  W.printEnum  ("StorageClass", Symbol.getStorageClass(),
                                                    makeArrayRef(ImageSymClass));
-  W.printNumber("AuxSymbolCount", Symbol->NumberOfAuxSymbols);
+  W.printNumber("AuxSymbolCount", Symbol.getNumberOfAuxSymbols());
 
-  for (unsigned I = 0; I < Symbol->NumberOfAuxSymbols; ++I) {
-    if (Symbol->isFunctionDefinition()) {
+  for (uint8_t I = 0; I < Symbol.getNumberOfAuxSymbols(); ++I) {
+    if (Symbol.isFunctionDefinition()) {
       const coff_aux_function_definition *Aux;
-      if (error(getSymbolAuxData(Obj, Symbol + I, Aux)))
+      if (error(getSymbolAuxData(Obj, Symbol, I, Aux)))
         break;
 
       DictScope AS(W, "AuxFunctionDef");
@@ -759,18 +888,16 @@ void COFFDumper::printSymbol(const SymbolRef &Sym) {
       W.printNumber("TotalSize", Aux->TotalSize);
       W.printHex("PointerToLineNumber", Aux->PointerToLinenumber);
       W.printHex("PointerToNextFunction", Aux->PointerToNextFunction);
-      W.printBinary("Unused", makeArrayRef(Aux->Unused));
 
-    } else if (Symbol->isWeakExternal()) {
+    } else if (Symbol.isAnyUndefined()) {
       const coff_aux_weak_external *Aux;
-      if (error(getSymbolAuxData(Obj, Symbol + I, Aux)))
+      if (error(getSymbolAuxData(Obj, Symbol, I, Aux)))
         break;
 
-      const coff_symbol *Linked;
+      ErrorOr<COFFSymbolRef> Linked = Obj->getSymbol(Aux->TagIndex);
       StringRef LinkedName;
-      std::error_code EC;
-      if ((EC = Obj->getSymbol(Aux->TagIndex, Linked)) ||
-          (EC = Obj->getSymbolName(Linked, LinkedName))) {
+      std::error_code EC = Linked.getError();
+      if (EC || (EC = Obj->getSymbolName(*Linked, LinkedName))) {
         LinkedName = "";
         error(EC);
       }
@@ -779,56 +906,60 @@ void COFFDumper::printSymbol(const SymbolRef &Sym) {
       W.printNumber("Linked", LinkedName, Aux->TagIndex);
       W.printEnum  ("Search", Aux->Characteristics,
                     makeArrayRef(WeakExternalCharacteristics));
-      W.printBinary("Unused", makeArrayRef(Aux->Unused));
 
-    } else if (Symbol->isFileRecord()) {
-      const coff_aux_file *Aux;
-      if (error(getSymbolAuxData(Obj, Symbol + I, Aux)))
+    } else if (Symbol.isFileRecord()) {
+      const char *FileName;
+      if (error(getSymbolAuxData(Obj, Symbol, I, FileName)))
         break;
 
       DictScope AS(W, "AuxFileRecord");
 
-      StringRef Name(Aux->FileName,
-                     Symbol->NumberOfAuxSymbols * COFF::SymbolSize);
+      StringRef Name(FileName, Symbol.getNumberOfAuxSymbols() *
+                                   Obj->getSymbolTableEntrySize());
       W.printString("FileName", Name.rtrim(StringRef("\0", 1)));
       break;
-    } else if (Symbol->isSectionDefinition()) {
+    } else if (Symbol.isSectionDefinition()) {
       const coff_aux_section_definition *Aux;
-      if (error(getSymbolAuxData(Obj, Symbol + I, Aux)))
+      if (error(getSymbolAuxData(Obj, Symbol, I, Aux)))
         break;
 
+      int32_t AuxNumber = Aux->getNumber(Symbol.isBigObj());
+
       DictScope AS(W, "AuxSectionDef");
       W.printNumber("Length", Aux->Length);
       W.printNumber("RelocationCount", Aux->NumberOfRelocations);
       W.printNumber("LineNumberCount", Aux->NumberOfLinenumbers);
       W.printHex("Checksum", Aux->CheckSum);
-      W.printNumber("Number", Aux->Number);
+      W.printNumber("Number", AuxNumber);
       W.printEnum("Selection", Aux->Selection, makeArrayRef(ImageCOMDATSelect));
-      W.printBinary("Unused", makeArrayRef(Aux->Unused));
 
       if (Section && Section->Characteristics & COFF::IMAGE_SCN_LNK_COMDAT
           && Aux->Selection == COFF::IMAGE_COMDAT_SELECT_ASSOCIATIVE) {
         const coff_section *Assoc;
-        StringRef AssocName;
-        std::error_code EC;
-        if ((EC = Obj->getSection(Aux->Number, Assoc)) ||
-            (EC = Obj->getSectionName(Assoc, AssocName))) {
+        StringRef AssocName = "";
+        std::error_code EC = Obj->getSection(AuxNumber, Assoc);
+        ErrorOr<StringRef> Res = getSectionName(Obj, AuxNumber, Assoc);
+        if (Res)
+          AssocName = *Res;
+        if (!EC)
+          EC = Res.getError();
+        if (EC) {
           AssocName = "";
           error(EC);
         }
 
-        W.printNumber("AssocSection", AssocName, Aux->Number);
+        W.printNumber("AssocSection", AssocName, AuxNumber);
       }
-    } else if (Symbol->isCLRToken()) {
+    } else if (Symbol.isCLRToken()) {
       const coff_aux_clr_token *Aux;
-      if (error(getSymbolAuxData(Obj, Symbol + I, Aux)))
+      if (error(getSymbolAuxData(Obj, Symbol, I, Aux)))
         break;
 
-      const coff_symbol *ReferredSym;
+      ErrorOr<COFFSymbolRef> ReferredSym =
+          Obj->getSymbol(Aux->SymbolTableIndex);
       StringRef ReferredName;
-      std::error_code EC;
-      if ((EC = Obj->getSymbol(Aux->SymbolTableIndex, ReferredSym)) ||
-          (EC = Obj->getSymbolName(ReferredSym, ReferredName))) {
+      std::error_code EC = ReferredSym.getError();
+      if (EC || (EC = Obj->getSymbolName(*ReferredSym, ReferredName))) {
         ReferredName = "";
         error(EC);
       }
@@ -837,7 +968,6 @@ void COFFDumper::printSymbol(const SymbolRef &Sym) {
       W.printNumber("AuxType", Aux->AuxType);
       W.printNumber("Reserved", Aux->Reserved);
       W.printNumber("SymbolTableIndex", ReferredName, Aux->SymbolTableIndex);
-      W.printBinary("Unused", makeArrayRef(Aux->Unused));
 
     } else {
       W.startLine() << "<unhandled auxiliary record>\n";
@@ -846,12 +976,8 @@ void COFFDumper::printSymbol(const SymbolRef &Sym) {
 }
 
 void COFFDumper::printUnwindInfo() {
-  const coff_file_header *Header;
-  if (error(Obj->getCOFFHeader(Header)))
-    return;
-
   ListScope D(W, "UnwindInformation");
-  switch (Header->Machine) {
+  switch (Obj->getMachine()) {
   case COFF::IMAGE_FILE_MACHINE_AMD64: {
     Win64EH::Dumper Dumper(W);
     Win64EH::Dumper::SymbolResolver
@@ -870,9 +996,133 @@ void COFFDumper::printUnwindInfo() {
     break;
   }
   default:
-    W.printEnum("unsupported Image Machine", Header->Machine,
+    W.printEnum("unsupported Image Machine", Obj->getMachine(),
                 makeArrayRef(ImageFileMachineType));
     break;
   }
 }
 
+void COFFDumper::printImportedSymbols(
+    iterator_range<imported_symbol_iterator> Range) {
+  for (const ImportedSymbolRef &I : Range) {
+    StringRef Sym;
+    if (error(I.getSymbolName(Sym))) return;
+    uint16_t Ordinal;
+    if (error(I.getOrdinal(Ordinal))) return;
+    W.printNumber("Symbol", Sym, Ordinal);
+  }
+}
+
+void COFFDumper::printDelayImportedSymbols(
+    const DelayImportDirectoryEntryRef &I,
+    iterator_range<imported_symbol_iterator> Range) {
+  int Index = 0;
+  for (const ImportedSymbolRef &S : Range) {
+    DictScope Import(W, "Import");
+    StringRef Sym;
+    if (error(S.getSymbolName(Sym))) return;
+    uint16_t Ordinal;
+    if (error(S.getOrdinal(Ordinal))) return;
+    W.printNumber("Symbol", Sym, Ordinal);
+    uint64_t Addr;
+    if (error(I.getImportAddress(Index++, Addr))) return;
+    W.printHex("Address", Addr);
+  }
+}
+
+void COFFDumper::printCOFFImports() {
+  // Regular imports
+  for (const ImportDirectoryEntryRef &I : Obj->import_directories()) {
+    DictScope Import(W, "Import");
+    StringRef Name;
+    if (error(I.getName(Name))) return;
+    W.printString("Name", Name);
+    uint32_t Addr;
+    if (error(I.getImportLookupTableRVA(Addr))) return;
+    W.printHex("ImportLookupTableRVA", Addr);
+    if (error(I.getImportAddressTableRVA(Addr))) return;
+    W.printHex("ImportAddressTableRVA", Addr);
+    printImportedSymbols(I.imported_symbols());
+  }
+
+  // Delay imports
+  for (const DelayImportDirectoryEntryRef &I : Obj->delay_import_directories()) {
+    DictScope Import(W, "DelayImport");
+    StringRef Name;
+    if (error(I.getName(Name))) return;
+    W.printString("Name", Name);
+    const delay_import_directory_table_entry *Table;
+    if (error(I.getDelayImportTable(Table))) return;
+    W.printHex("Attributes", Table->Attributes);
+    W.printHex("ModuleHandle", Table->ModuleHandle);
+    W.printHex("ImportAddressTable", Table->DelayImportAddressTable);
+    W.printHex("ImportNameTable", Table->DelayImportNameTable);
+    W.printHex("BoundDelayImportTable", Table->BoundDelayImportTable);
+    W.printHex("UnloadDelayImportTable", Table->UnloadDelayImportTable);
+    printDelayImportedSymbols(I, I.imported_symbols());
+  }
+}
+
+void COFFDumper::printCOFFExports() {
+  for (const ExportDirectoryEntryRef &E : Obj->export_directories()) {
+    DictScope Export(W, "Export");
+
+    StringRef Name;
+    uint32_t Ordinal, RVA;
+
+    if (error(E.getSymbolName(Name)))
+      continue;
+    if (error(E.getOrdinal(Ordinal)))
+      continue;
+    if (error(E.getExportRVA(RVA)))
+      continue;
+
+    W.printNumber("Ordinal", Ordinal);
+    W.printString("Name", Name);
+    W.printHex("RVA", RVA);
+  }
+}
+
+void COFFDumper::printCOFFDirectives() {
+  for (const SectionRef &Section : Obj->sections()) {
+    StringRef Contents;
+    StringRef Name;
+
+    if (error(Section.getName(Name)))
+      continue;
+    if (Name != ".drectve")
+      continue;
+
+    if (error(Section.getContents(Contents)))
+      return;
+
+    W.printString("Directive(s)", Contents);
+  }
+}
+
+static StringRef getBaseRelocTypeName(uint8_t Type) {
+  switch (Type) {
+  case COFF::IMAGE_REL_BASED_ABSOLUTE: return "ABSOLUTE";
+  case COFF::IMAGE_REL_BASED_HIGH: return "HIGH";
+  case COFF::IMAGE_REL_BASED_LOW: return "LOW";
+  case COFF::IMAGE_REL_BASED_HIGHLOW: return "HIGHLOW";
+  case COFF::IMAGE_REL_BASED_HIGHADJ: return "HIGHADJ";
+  case COFF::IMAGE_REL_BASED_DIR64: return "DIR64";
+  default: return "unknown (" + llvm::utostr(Type) + ")";
+  }
+}
+
+void COFFDumper::printCOFFBaseReloc() {
+  ListScope D(W, "BaseReloc");
+  for (const BaseRelocRef &I : Obj->base_relocs()) {
+    uint8_t Type;
+    uint32_t RVA;
+    if (error(I.getRVA(RVA)))
+      continue;
+    if (error(I.getType(Type)))
+      continue;
+    DictScope Import(W, "Entry");
+    W.printString("Type", getBaseRelocTypeName(Type));
+    W.printHex("Address", RVA);
+  }
+}
diff --git a/tools/llvm-readobj/ELFDumper.cpp b/tools/llvm-readobj/ELFDumper.cpp
index 1791f5a32471..d68c78682d23 100644
--- a/tools/llvm-readobj/ELFDumper.cpp
+++ b/tools/llvm-readobj/ELFDumper.cpp
@@ -604,7 +604,7 @@ void ELFDumper<ELFT>::printSections() {
       }
     }
 
-    if (opts::SectionData) {
+    if (opts::SectionData && Section->sh_type != ELF::SHT_NOBITS) {
       ArrayRef<uint8_t> Data = errorOrDefault(Obj->getSectionContents(Section));
       W.printBinaryBlock("SectionData",
                          StringRef((const char *)Data.data(), Data.size()));
@@ -676,7 +676,8 @@ void ELFDumper<ELFT>::printRelocation(const Elf_Shdr *Sec,
     DictScope Group(W, "Relocation");
     W.printHex("Offset", Rel.r_offset);
     W.printNumber("Type", RelocName, (int)Rel.getType(Obj->isMips64EL()));
-    W.printString("Symbol", SymbolName.size() > 0 ? SymbolName : "-");
+    W.printNumber("Symbol", SymbolName.size() > 0 ? SymbolName : "-",
+                  Rel.getSymbol(Obj->isMips64EL()));
     W.printHex("Addend", Rel.r_addend);
   } else {
     raw_ostream& OS = W.startLine();
diff --git a/tools/llvm-readobj/Error.cpp b/tools/llvm-readobj/Error.cpp
index a078f5c095c7..7e6f780c5d1a 100644
--- a/tools/llvm-readobj/Error.cpp
+++ b/tools/llvm-readobj/Error.cpp
@@ -24,7 +24,7 @@ public:
 };
 } // namespace
 
-const char *_readobj_error_category::name() const {
+const char *_readobj_error_category::name() const LLVM_NOEXCEPT {
   return "llvm.readobj";
 }
 
diff --git a/tools/llvm-readobj/Error.h b/tools/llvm-readobj/Error.h
index 81ce4082aab9..f3e24bbe5dbf 100644
--- a/tools/llvm-readobj/Error.h
+++ b/tools/llvm-readobj/Error.h
@@ -11,8 +11,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_READOBJ_ERROR_H
-#define LLVM_READOBJ_ERROR_H
+#ifndef LLVM_TOOLS_LLVM_READOBJ_ERROR_H
+#define LLVM_TOOLS_LLVM_READOBJ_ERROR_H
 
 #include <system_error>
 
diff --git a/tools/llvm-readobj/MachODumper.cpp b/tools/llvm-readobj/MachODumper.cpp
index a5e5cf850a3b..7e8fdadd855b 100644
--- a/tools/llvm-readobj/MachODumper.cpp
+++ b/tools/llvm-readobj/MachODumper.cpp
@@ -31,14 +31,17 @@ public:
     : ObjDumper(Writer)
     , Obj(Obj) { }
 
-  virtual void printFileHeaders() override;
-  virtual void printSections() override;
-  virtual void printRelocations() override;
-  virtual void printSymbols() override;
-  virtual void printDynamicSymbols() override;
-  virtual void printUnwindInfo() override;
+  void printFileHeaders() override;
+  void printSections() override;
+  void printRelocations() override;
+  void printSymbols() override;
+  void printDynamicSymbols() override;
+  void printUnwindInfo() override;
 
 private:
+  template<class MachHeader>
+  void printFileHeaders(const MachHeader &Header);
+
   void printSymbol(const SymbolRef &Symbol);
 
   void printRelocation(const RelocationRef &Reloc);
@@ -68,6 +71,137 @@ std::error_code createMachODumper(const object::ObjectFile *Obj,
 
 } // namespace llvm
 
+static const EnumEntry<uint32_t> MachOMagics[] = {
+  { "Magic",      MachO::MH_MAGIC    },
+  { "Cigam",      MachO::MH_CIGAM    },
+  { "Magic64",    MachO::MH_MAGIC_64 },
+  { "Cigam64",    MachO::MH_CIGAM_64 },
+  { "FatMagic",   MachO::FAT_MAGIC   },
+  { "FatCigam",   MachO::FAT_CIGAM   },
+};
+
+static const EnumEntry<uint32_t> MachOHeaderFileTypes[] = {
+  { "Relocatable",          MachO::MH_OBJECT      },
+  { "Executable",           MachO::MH_EXECUTE     },
+  { "FixedVMLibrary",       MachO::MH_FVMLIB      },
+  { "Core",                 MachO::MH_CORE        },
+  { "PreloadedExecutable",  MachO::MH_PRELOAD     },
+  { "DynamicLibrary",       MachO::MH_DYLIB       },
+  { "DynamicLinker",        MachO::MH_DYLINKER    },
+  { "Bundle",               MachO::MH_BUNDLE      },
+  { "DynamicLibraryStub",   MachO::MH_DYLIB_STUB  },
+  { "DWARFSymbol",          MachO::MH_DSYM        },
+  { "KextBundle",           MachO::MH_KEXT_BUNDLE },
+};
+
+static const EnumEntry<uint32_t> MachOHeaderCpuTypes[] = {
+  { "Any"       , static_cast<uint32_t>(MachO::CPU_TYPE_ANY) },
+  { "X86"       , MachO::CPU_TYPE_X86       },
+  { "X86-64"    , MachO::CPU_TYPE_X86_64    },
+  { "Mc98000"   , MachO::CPU_TYPE_MC98000   },
+  { "Arm"       , MachO::CPU_TYPE_ARM       },
+  { "Arm64"     , MachO::CPU_TYPE_ARM64     },
+  { "Sparc"     , MachO::CPU_TYPE_SPARC     },
+  { "PowerPC"   , MachO::CPU_TYPE_POWERPC   },
+  { "PowerPC64" , MachO::CPU_TYPE_POWERPC64 },
+};
+
+static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesX86[] = {
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_I386_ALL),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_386),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_486),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_486SX),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_586),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTPRO),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTII_M3),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTII_M5),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_CELERON),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_CELERON_MOBILE),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_3),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_3_M),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_3_XEON),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_M),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_4),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_4_M),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ITANIUM),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ITANIUM_2),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_XEON),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_XEON_MP),
+};
+
+static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesX64[] = {
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_X86_64_ALL),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_X86_ARCH1),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_X86_64_H),
+};
+
+static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesARM[] = {
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_ALL),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V4T),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V6),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V5),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V5TEJ),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_XSCALE),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7S),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7K),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V6M),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7M),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7EM),
+};
+
+static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesARM64[] = {
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM64_ALL),
+};
+
+static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesSPARC[] = {
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_SPARC_ALL),
+};
+
+static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesPPC[] = {
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_ALL),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_601),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_602),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_603),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_603e),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_603ev),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_604),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_604e),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_620),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_750),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_7400),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_7450),
+  LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_970),
+};
+
+static const EnumEntry<uint32_t> MachOHeaderFlags[] = {
+  LLVM_READOBJ_ENUM_ENT(MachO, MH_NOUNDEFS),
+  LLVM_READOBJ_ENUM_ENT(MachO, MH_INCRLINK),
+  LLVM_READOBJ_ENUM_ENT(MachO, MH_DYLDLINK),
+  LLVM_READOBJ_ENUM_ENT(MachO, MH_BINDATLOAD),
+  LLVM_READOBJ_ENUM_ENT(MachO, MH_PREBOUND),
+  LLVM_READOBJ_ENUM_ENT(MachO, MH_SPLIT_SEGS),
+  LLVM_READOBJ_ENUM_ENT(MachO, MH_LAZY_INIT),
+  LLVM_READOBJ_ENUM_ENT(MachO, MH_TWOLEVEL),
+  LLVM_READOBJ_ENUM_ENT(MachO, MH_FORCE_FLAT),
+  LLVM_READOBJ_ENUM_ENT(MachO, MH_NOMULTIDEFS),
+  LLVM_READOBJ_ENUM_ENT(MachO, MH_NOFIXPREBINDING),
+  LLVM_READOBJ_ENUM_ENT(MachO, MH_PREBINDABLE),
+  LLVM_READOBJ_ENUM_ENT(MachO, MH_ALLMODSBOUND),
+  LLVM_READOBJ_ENUM_ENT(MachO, MH_SUBSECTIONS_VIA_SYMBOLS),
+  LLVM_READOBJ_ENUM_ENT(MachO, MH_CANONICAL),
+  LLVM_READOBJ_ENUM_ENT(MachO, MH_WEAK_DEFINES),
+  LLVM_READOBJ_ENUM_ENT(MachO, MH_BINDS_TO_WEAK),
+  LLVM_READOBJ_ENUM_ENT(MachO, MH_ALLOW_STACK_EXECUTION),
+  LLVM_READOBJ_ENUM_ENT(MachO, MH_ROOT_SAFE),
+  LLVM_READOBJ_ENUM_ENT(MachO, MH_SETUID_SAFE),
+  LLVM_READOBJ_ENUM_ENT(MachO, MH_NO_REEXPORTED_DYLIBS),
+  LLVM_READOBJ_ENUM_ENT(MachO, MH_PIE),
+  LLVM_READOBJ_ENUM_ENT(MachO, MH_DEAD_STRIPPABLE_DYLIB),
+  LLVM_READOBJ_ENUM_ENT(MachO, MH_HAS_TLV_DESCRIPTORS),
+  LLVM_READOBJ_ENUM_ENT(MachO, MH_NO_HEAP_EXECUTION),
+  LLVM_READOBJ_ENUM_ENT(MachO, MH_APP_EXTENSION_SAFE),
+};
 
 static const EnumEntry<unsigned> MachOSectionTypes[] = {
   { "Regular"                        , 0x00 },
@@ -205,7 +339,47 @@ static void getSymbol(const MachOObjectFile *Obj,
 }
 
 void MachODumper::printFileHeaders() {
-  W.startLine() << "FileHeaders not implemented.\n";
+  DictScope H(W, "MachHeader");
+  if (!Obj->is64Bit()) {
+    printFileHeaders(Obj->getHeader());
+  } else {
+    printFileHeaders(Obj->getHeader64());
+    W.printHex("Reserved", Obj->getHeader64().reserved);
+  }
+}
+
+template<class MachHeader>
+void MachODumper::printFileHeaders(const MachHeader &Header) {
+  W.printEnum("Magic", Header.magic, makeArrayRef(MachOMagics));
+  W.printEnum("CpuType", Header.cputype, makeArrayRef(MachOHeaderCpuTypes));
+  uint32_t subtype = Header.cpusubtype & ~MachO::CPU_SUBTYPE_MASK;
+  switch (Header.cputype) {
+  case MachO::CPU_TYPE_X86:
+    W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesX86));
+    break;
+  case MachO::CPU_TYPE_X86_64:
+    W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesX64));
+    break;
+  case MachO::CPU_TYPE_ARM:
+    W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesARM));
+    break;
+  case MachO::CPU_TYPE_POWERPC:
+    W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesPPC));
+    break;
+  case MachO::CPU_TYPE_SPARC:
+    W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesSPARC));
+    break;
+  case MachO::CPU_TYPE_ARM64:
+    W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesARM64));
+    break;
+  case MachO::CPU_TYPE_POWERPC64:
+  default:
+    W.printHex("CpuSubtype", subtype);
+  }
+  W.printEnum("FileType", Header.filetype, makeArrayRef(MachOHeaderFileTypes));
+  W.printNumber("NumOfLoadCommands", Header.ncmds);
+  W.printNumber("SizeOfLoadCommands", Header.sizeofcmds);
+  W.printFlags("Flags", Header.flags, makeArrayRef(MachOHeaderFlags));
 }
 
 void MachODumper::printSections() {
@@ -257,8 +431,7 @@ void MachODumper::printSections(const MachOObjectFile *Obj) {
     if (opts::SectionSymbols) {
       ListScope D(W, "Symbols");
       for (const SymbolRef &Symbol : Obj->symbols()) {
-        bool Contained = false;
-        if (Section.containsSymbol(Symbol, Contained) || !Contained)
+        if (!Section.containsSymbol(Symbol))
           continue;
 
         printSymbol(Symbol);
@@ -266,11 +439,14 @@ void MachODumper::printSections(const MachOObjectFile *Obj) {
     }
 
     if (opts::SectionData) {
-      StringRef Data;
-      if (error(Section.getContents(Data)))
-        break;
+      bool IsBSS = Section.isBSS();
+      if (!IsBSS) {
+        StringRef Data;
+        if (error(Section.getContents(Data)))
+          break;
 
-      W.printBinaryBlock("SectionData", Data);
+        W.printBinaryBlock("SectionData", Data);
+      }
     }
   }
 }
diff --git a/tools/llvm-readobj/ObjDumper.h b/tools/llvm-readobj/ObjDumper.h
index f80a28b25cfc..27e658fc731a 100644
--- a/tools/llvm-readobj/ObjDumper.h
+++ b/tools/llvm-readobj/ObjDumper.h
@@ -7,8 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_READOBJ_OBJDUMPER_H
-#define LLVM_READOBJ_OBJDUMPER_H
+#ifndef LLVM_TOOLS_LLVM_READOBJ_OBJDUMPER_H
+#define LLVM_TOOLS_LLVM_READOBJ_OBJDUMPER_H
 
 #include <memory>
 #include <system_error>
@@ -43,6 +43,12 @@ public:
   // Only implemented for MIPS ELF at this time.
   virtual void printMipsPLTGOT() { }
 
+  // Only implemented for PE/COFF.
+  virtual void printCOFFImports() { }
+  virtual void printCOFFExports() { }
+  virtual void printCOFFDirectives() { }
+  virtual void printCOFFBaseReloc() { }
+
 protected:
   StreamWriter& W;
 };
diff --git a/tools/llvm-readobj/StreamWriter.h b/tools/llvm-readobj/StreamWriter.h
index 04b38fbe25ea..2fc53eeeec4a 100644
--- a/tools/llvm-readobj/StreamWriter.h
+++ b/tools/llvm-readobj/StreamWriter.h
@@ -7,8 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_READOBJ_STREAMWRITER_H
-#define LLVM_READOBJ_STREAMWRITER_H
+#ifndef LLVM_TOOLS_LLVM_READOBJ_STREAMWRITER_H
+#define LLVM_TOOLS_LLVM_READOBJ_STREAMWRITER_H
 
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/SmallVector.h"
@@ -214,8 +214,8 @@ public:
   }
 
   void printBinary(StringRef Label, StringRef Str, ArrayRef<char> Value) {
-    ArrayRef<uint8_t> V(reinterpret_cast<const uint8_t*>(Value.data()),
-                        Value.size());
+    auto V = makeArrayRef(reinterpret_cast<const uint8_t*>(Value.data()),
+                          Value.size());
     printBinaryImpl(Label, Str, V, false);
   }
 
@@ -224,20 +224,20 @@ public:
   }
 
   void printBinary(StringRef Label, ArrayRef<char> Value) {
-    ArrayRef<uint8_t> V(reinterpret_cast<const uint8_t*>(Value.data()),
-                        Value.size());
+    auto V = makeArrayRef(reinterpret_cast<const uint8_t*>(Value.data()),
+                          Value.size());
     printBinaryImpl(Label, StringRef(), V, false);
   }
 
   void printBinary(StringRef Label, StringRef Value) {
-    ArrayRef<uint8_t> V(reinterpret_cast<const uint8_t*>(Value.data()),
-                        Value.size());
+    auto V = makeArrayRef(reinterpret_cast<const uint8_t*>(Value.data()),
+                          Value.size());
     printBinaryImpl(Label, StringRef(), V, false);
   }
 
   void printBinaryBlock(StringRef Label, StringRef Value) {
-    ArrayRef<uint8_t> V(reinterpret_cast<const uint8_t*>(Value.data()),
-                        Value.size());
+    auto V = makeArrayRef(reinterpret_cast<const uint8_t*>(Value.data()),
+                          Value.size());
     printBinaryImpl(Label, StringRef(), V, true);
   }
 
diff --git a/tools/llvm-readobj/Win64EHDumper.h b/tools/llvm-readobj/Win64EHDumper.h
index 9ce4d39a6912..a80df9c4f94d 100644
--- a/tools/llvm-readobj/Win64EHDumper.h
+++ b/tools/llvm-readobj/Win64EHDumper.h
@@ -7,8 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_TOOLS_READOBJ_WIN64EHPRINTER_H
-#define LLVM_TOOLS_READOBJ_WIN64EHPRINTER_H
+#ifndef LLVM_TOOLS_LLVM_READOBJ_WIN64EHDUMPER_H
+#define LLVM_TOOLS_LLVM_READOBJ_WIN64EHDUMPER_H
 
 #include "StreamWriter.h"
 #include "llvm/Support/Win64EH.h"
diff --git a/tools/llvm-readobj/llvm-readobj.cpp b/tools/llvm-readobj/llvm-readobj.cpp
index 8d2a997a2312..f95fea8ec3e8 100644
--- a/tools/llvm-readobj/llvm-readobj.cpp
+++ b/tools/llvm-readobj/llvm-readobj.cpp
@@ -24,6 +24,7 @@
 #include "ObjDumper.h"
 #include "StreamWriter.h"
 #include "llvm/Object/Archive.h"
+#include "llvm/Object/ELFObjectFile.h"
 #include "llvm/Object/ObjectFile.h"
 #include "llvm/Support/Casting.h"
 #include "llvm/Support/CommandLine.h"
@@ -140,6 +141,24 @@ namespace opts {
   cl::opt<bool>
   MipsPLTGOT("mips-plt-got",
              cl::desc("Display the MIPS GOT and PLT GOT sections"));
+
+  // -coff-imports
+  cl::opt<bool>
+  COFFImports("coff-imports", cl::desc("Display the PE/COFF import table"));
+
+  // -coff-exports
+  cl::opt<bool>
+  COFFExports("coff-exports", cl::desc("Display the PE/COFF export table"));
+
+  // -coff-directives
+  cl::opt<bool>
+  COFFDirectives("coff-directives",
+                 cl::desc("Display the PE/COFF .drectve section"));
+
+  // -coff-basereloc
+  cl::opt<bool>
+  COFFBaseRelocs("coff-basereloc",
+                 cl::desc("Display the PE/COFF .reloc section"));
 } // namespace opts
 
 static int ReturnValue = EXIT_SUCCESS;
@@ -158,8 +177,8 @@ bool error(std::error_code EC) {
 
 bool relocAddressLess(RelocationRef a, RelocationRef b) {
   uint64_t a_addr, b_addr;
-  if (error(a.getOffset(a_addr))) return false;
-  if (error(b.getOffset(b_addr))) return false;
+  if (error(a.getOffset(a_addr))) exit(ReturnValue);
+  if (error(b.getOffset(b_addr))) exit(ReturnValue);
   return a_addr < b_addr;
 }
 
@@ -210,6 +229,17 @@ static std::error_code createDumper(const ObjectFile *Obj, StreamWriter &Writer,
   return readobj_error::unsupported_obj_file_format;
 }
 
+static StringRef getLoadName(const ObjectFile *Obj) {
+  if (auto *ELF = dyn_cast<ELF32LEObjectFile>(Obj))
+    return ELF->getLoadName();
+  if (auto *ELF = dyn_cast<ELF64LEObjectFile>(Obj))
+    return ELF->getLoadName();
+  if (auto *ELF = dyn_cast<ELF32BEObjectFile>(Obj))
+    return ELF->getLoadName();
+  if (auto *ELF = dyn_cast<ELF64BEObjectFile>(Obj))
+    return ELF->getLoadName();
+  llvm_unreachable("Not ELF");
+}
 
 /// @brief Dumps the specified object file.
 static void dumpObject(const ObjectFile *Obj) {
@@ -228,7 +258,7 @@ static void dumpObject(const ObjectFile *Obj) {
          << "\n";
   outs() << "AddressSize: " << (8*Obj->getBytesInAddress()) << "bit\n";
   if (Obj->isELF())
-    outs() << "LoadName: " << Obj->getLoadName() << "\n";
+    outs() << "LoadName: " << getLoadName(Obj) << "\n";
 
   if (opts::FileHeaders)
     Dumper->printFileHeaders();
@@ -254,6 +284,14 @@ static void dumpObject(const ObjectFile *Obj) {
   if (isMipsArch(Obj->getArch()) && Obj->isELF())
     if (opts::MipsPLTGOT)
       Dumper->printMipsPLTGOT();
+  if (opts::COFFImports)
+    Dumper->printCOFFImports();
+  if (opts::COFFExports)
+    Dumper->printCOFFExports();
+  if (opts::COFFDirectives)
+    Dumper->printCOFFDirectives();
+  if (opts::COFFBaseRelocs)
+    Dumper->printCOFFBaseReloc();
 }
 
 
@@ -287,16 +325,16 @@ static void dumpInput(StringRef File) {
   }
 
   // Attempt to open the binary.
-  ErrorOr<Binary *> BinaryOrErr = createBinary(File);
+  ErrorOr<OwningBinary<Binary>> BinaryOrErr = createBinary(File);
   if (std::error_code EC = BinaryOrErr.getError()) {
     reportError(File, EC);
     return;
   }
-  std::unique_ptr<Binary> Binary(BinaryOrErr.get());
+  Binary &Binary = *BinaryOrErr.get().getBinary();
 
-  if (Archive *Arc = dyn_cast<Archive>(Binary.get()))
+  if (Archive *Arc = dyn_cast<Archive>(&Binary))
     dumpArchive(Arc);
-  else if (ObjectFile *Obj = dyn_cast<ObjectFile>(Binary.get()))
+  else if (ObjectFile *Obj = dyn_cast<ObjectFile>(&Binary))
     dumpObject(Obj);
   else
     reportError(File, readobj_error::unrecognized_file_format);
diff --git a/tools/llvm-readobj/llvm-readobj.h b/tools/llvm-readobj/llvm-readobj.h
index 04139480a6d8..1c334178a24e 100644
--- a/tools/llvm-readobj/llvm-readobj.h
+++ b/tools/llvm-readobj/llvm-readobj.h
@@ -7,8 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_TOOLS_READ_OBJ_H
-#define LLVM_TOOLS_READ_OBJ_H
+#ifndef LLVM_TOOLS_LLVM_READOBJ_LLVM_READOBJ_H
+#define LLVM_TOOLS_LLVM_READOBJ_LLVM_READOBJ_H
 
 #include "llvm/Support/CommandLine.h"
 #include <string>
diff --git a/tools/llvm-rtdyld/CMakeLists.txt b/tools/llvm-rtdyld/CMakeLists.txt
index feb213489d3f..e294760801bb 100644
--- a/tools/llvm-rtdyld/CMakeLists.txt
+++ b/tools/llvm-rtdyld/CMakeLists.txt
@@ -3,6 +3,7 @@ set(LLVM_LINK_COMPONENTS
   DebugInfo
   ExecutionEngine
   MC
+  Object
   RuntimeDyld
   Support
   )
diff --git a/tools/llvm-rtdyld/LLVMBuild.txt b/tools/llvm-rtdyld/LLVMBuild.txt
index b36d13c75a0b..c4ed49bdff29 100644
--- a/tools/llvm-rtdyld/LLVMBuild.txt
+++ b/tools/llvm-rtdyld/LLVMBuild.txt
@@ -19,4 +19,4 @@
 type = Tool
 name = llvm-rtdyld
 parent = Tools
-required_libraries = JIT MC Object RuntimeDyld Support all-targets
+required_libraries = MC Object RuntimeDyld Support all-targets
diff --git a/tools/llvm-rtdyld/Makefile b/tools/llvm-rtdyld/Makefile
index fabdd683a997..9de753ef22ad 100644
--- a/tools/llvm-rtdyld/Makefile
+++ b/tools/llvm-rtdyld/Makefile
@@ -9,7 +9,7 @@
 
 LEVEL := ../..
 TOOLNAME := llvm-rtdyld
-LINK_COMPONENTS := all-targets support MC object RuntimeDyld JIT debuginfo
+LINK_COMPONENTS := all-targets support MC object RuntimeDyld MCJIT debuginfo
 
 # This tool has no plugins, optimize startup time.
 TOOL_NO_EXPORTS := 1
diff --git a/tools/llvm-rtdyld/llvm-rtdyld.cpp b/tools/llvm-rtdyld/llvm-rtdyld.cpp
index 45734f4b7ba6..5b6f301994db 100644
--- a/tools/llvm-rtdyld/llvm-rtdyld.cpp
+++ b/tools/llvm-rtdyld/llvm-rtdyld.cpp
@@ -13,15 +13,13 @@
 
 #include "llvm/ADT/StringMap.h"
 #include "llvm/DebugInfo/DIContext.h"
-#include "llvm/ExecutionEngine/ObjectBuffer.h"
-#include "llvm/ExecutionEngine/ObjectImage.h"
 #include "llvm/ExecutionEngine/RuntimeDyld.h"
 #include "llvm/ExecutionEngine/RuntimeDyldChecker.h"
 #include "llvm/MC/MCAsmInfo.h"
 #include "llvm/MC/MCContext.h"
 #include "llvm/MC/MCDisassembler.h"
-#include "llvm/MC/MCInstrInfo.h"
 #include "llvm/MC/MCInstPrinter.h"
+#include "llvm/MC/MCInstrInfo.h"
 #include "llvm/MC/MCRegisterInfo.h"
 #include "llvm/Object/MachO.h"
 #include "llvm/Support/CommandLine.h"
@@ -30,10 +28,11 @@
 #include "llvm/Support/Memory.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/PrettyStackTrace.h"
-#include "llvm/Support/raw_ostream.h"
 #include "llvm/Support/Signals.h"
 #include "llvm/Support/TargetRegistry.h"
 #include "llvm/Support/TargetSelect.h"
+#include "llvm/Support/raw_ostream.h"
+#include <list>
 #include <system_error>
 
 using namespace llvm;
@@ -78,6 +77,31 @@ CheckFiles("check",
            cl::desc("File containing RuntimeDyld verifier checks."),
            cl::ZeroOrMore);
 
+static cl::opt<uint64_t>
+TargetAddrStart("target-addr-start",
+                cl::desc("For -verify only: start of phony target address "
+                         "range."),
+                cl::init(4096), // Start at "page 1" - no allocating at "null".
+                cl::Hidden);
+
+static cl::opt<uint64_t>
+TargetAddrEnd("target-addr-end",
+              cl::desc("For -verify only: end of phony target address range."),
+              cl::init(~0ULL),
+              cl::Hidden);
+
+static cl::opt<uint64_t>
+TargetSectionSep("target-section-sep",
+                 cl::desc("For -verify only: Separation between sections in "
+                          "phony target address space."),
+                 cl::init(0),
+                 cl::Hidden);
+
+static cl::list<std::string>
+SpecificSectionMappings("map-section",
+                        cl::desc("Map a section to a specific address."),
+                        cl::ZeroOrMore);
+
 /* *** */
 
 // A trivial memory manager that doesn't do anything fancy, just uses the
@@ -181,23 +205,32 @@ static int printLineInfoForInput() {
     if (std::error_code EC = InputBuffer.getError())
       return Error("unable to read input: '" + EC.message() + "'");
 
-    std::unique_ptr<ObjectImage> LoadedObject;
+    ErrorOr<std::unique_ptr<ObjectFile>> MaybeObj(
+      ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));
+
+    if (std::error_code EC = MaybeObj.getError())
+      return Error("unable to create object file: '" + EC.message() + "'");
+
+    ObjectFile &Obj = **MaybeObj;
+
     // Load the object file
-    LoadedObject.reset(
-        Dyld.loadObject(new ObjectBuffer(InputBuffer.get().release())));
-    if (!LoadedObject) {
+    std::unique_ptr<RuntimeDyld::LoadedObjectInfo> LoadedObjInfo =
+      Dyld.loadObject(Obj);
+
+    if (Dyld.hasError())
       return Error(Dyld.getErrorString());
-    }
 
     // Resolve all the relocations we can.
     Dyld.resolveRelocations();
 
+    OwningBinary<ObjectFile> DebugObj = LoadedObjInfo->getObjectForDebug(Obj);
+
     std::unique_ptr<DIContext> Context(
-        DIContext::getDWARFContext(LoadedObject->getObjectFile()));
+      DIContext::getDWARFContext(*DebugObj.getBinary()));
 
     // Use symbol info to iterate functions in the object.
-    for (object::symbol_iterator I = LoadedObject->begin_symbols(),
-                                 E = LoadedObject->end_symbols();
+    for (object::symbol_iterator I = DebugObj.getBinary()->symbol_begin(),
+                                 E = DebugObj.getBinary()->symbol_end();
          I != E; ++I) {
       object::SymbolRef::Type SymType;
       if (I->getType(SymType)) continue;
@@ -242,11 +275,17 @@ static int executeInput() {
         MemoryBuffer::getFileOrSTDIN(InputFileList[i]);
     if (std::error_code EC = InputBuffer.getError())
       return Error("unable to read input: '" + EC.message() + "'");
-    std::unique_ptr<ObjectImage> LoadedObject;
+    ErrorOr<std::unique_ptr<ObjectFile>> MaybeObj(
+      ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));
+
+    if (std::error_code EC = MaybeObj.getError())
+      return Error("unable to create object file: '" + EC.message() + "'");
+
+    ObjectFile &Obj = **MaybeObj;
+
     // Load the object file
-    LoadedObject.reset(
-        Dyld.loadObject(new ObjectBuffer(InputBuffer.get().release())));
-    if (!LoadedObject) {
+    Dyld.loadObject(Obj);
+    if (Dyld.hasError()) {
       return Error(Dyld.getErrorString());
     }
   }
@@ -300,6 +339,134 @@ static int checkAllExpressions(RuntimeDyldChecker &Checker) {
   return 0;
 }
 
+std::map<void*, uint64_t>
+applySpecificSectionMappings(RuntimeDyldChecker &Checker) {
+
+  std::map<void*, uint64_t> SpecificMappings;
+
+  for (StringRef Mapping : SpecificSectionMappings) {
+
+    size_t EqualsIdx = Mapping.find_first_of("=");
+    StringRef SectionIDStr = Mapping.substr(0, EqualsIdx);
+    size_t ComaIdx = Mapping.find_first_of(",");
+
+    if (ComaIdx == StringRef::npos) {
+      errs() << "Invalid section specification '" << Mapping
+             << "'. Should be '<file name>,<section name>=<addr>'\n";
+      exit(1);
+    }
+
+    StringRef FileName = SectionIDStr.substr(0, ComaIdx);
+    StringRef SectionName = SectionIDStr.substr(ComaIdx + 1);
+
+    uint64_t OldAddrInt;
+    std::string ErrorMsg;
+    std::tie(OldAddrInt, ErrorMsg) =
+      Checker.getSectionAddr(FileName, SectionName, true);
+
+    if (ErrorMsg != "") {
+      errs() << ErrorMsg;
+      exit(1);
+    }
+
+    void* OldAddr = reinterpret_cast<void*>(static_cast<uintptr_t>(OldAddrInt));
+
+    StringRef NewAddrStr = Mapping.substr(EqualsIdx + 1);
+    uint64_t NewAddr;
+
+    if (NewAddrStr.getAsInteger(0, NewAddr)) {
+      errs() << "Invalid section address in mapping: " << Mapping << "\n";
+      exit(1);
+    }
+
+    Checker.getRTDyld().mapSectionAddress(OldAddr, NewAddr);
+    SpecificMappings[OldAddr] = NewAddr;
+  }
+
+  return SpecificMappings;
+}
+
+// Scatter sections in all directions!
+// Remaps section addresses for -verify mode. The following command line options
+// can be used to customize the layout of the memory within the phony target's
+// address space:
+// -target-addr-start <s> -- Specify where the phony target addres range starts.
+// -target-addr-end   <e> -- Specify where the phony target address range ends.
+// -target-section-sep <d> -- Specify how big a gap should be left between the
+//                            end of one section and the start of the next.
+//                            Defaults to zero. Set to something big
+//                            (e.g. 1 << 32) to stress-test stubs, GOTs, etc.
+//
+void remapSections(const llvm::Triple &TargetTriple,
+                   const TrivialMemoryManager &MemMgr,
+                   RuntimeDyldChecker &Checker) {
+
+  // Set up a work list (section addr/size pairs).
+  typedef std::list<std::pair<void*, uint64_t>> WorklistT;
+  WorklistT Worklist;
+
+  for (const auto& CodeSection : MemMgr.FunctionMemory)
+    Worklist.push_back(std::make_pair(CodeSection.base(), CodeSection.size()));
+  for (const auto& DataSection : MemMgr.DataMemory)
+    Worklist.push_back(std::make_pair(DataSection.base(), DataSection.size()));
+
+  // Apply any section-specific mappings that were requested on the command
+  // line.
+  typedef std::map<void*, uint64_t> AppliedMappingsT;
+  AppliedMappingsT AppliedMappings = applySpecificSectionMappings(Checker);
+
+  // Keep an "already allocated" mapping of section target addresses to sizes.
+  // Sections whose address mappings aren't specified on the command line will
+  // allocated around the explicitly mapped sections while maintaining the
+  // minimum separation.
+  std::map<uint64_t, uint64_t> AlreadyAllocated;
+
+  // Move the previously applied mappings into the already-allocated map.
+  for (WorklistT::iterator I = Worklist.begin(), E = Worklist.end();
+       I != E;) {
+    WorklistT::iterator Tmp = I;
+    ++I;
+    AppliedMappingsT::iterator AI = AppliedMappings.find(Tmp->first);
+
+    if (AI != AppliedMappings.end()) {
+      AlreadyAllocated[AI->second] = Tmp->second;
+      Worklist.erase(Tmp);
+    }
+  }
+
+  // If the -target-addr-end option wasn't explicitly passed, then set it to a
+  // sensible default based on the target triple.
+  if (TargetAddrEnd.getNumOccurrences() == 0) {
+    if (TargetTriple.isArch16Bit())
+      TargetAddrEnd = (1ULL << 16) - 1;
+    else if (TargetTriple.isArch32Bit())
+      TargetAddrEnd = (1ULL << 32) - 1;
+    // TargetAddrEnd already has a sensible default for 64-bit systems, so
+    // there's nothing to do in the 64-bit case.
+  }
+
+  // Process any elements remaining in the worklist.
+  while (!Worklist.empty()) {
+    std::pair<void*, uint64_t> CurEntry = Worklist.front();
+    Worklist.pop_front();
+
+    uint64_t NextSectionAddr = TargetAddrStart;
+
+    for (const auto &Alloc : AlreadyAllocated)
+      if (NextSectionAddr + CurEntry.second + TargetSectionSep <= Alloc.first)
+        break;
+      else
+        NextSectionAddr = Alloc.first + Alloc.second + TargetSectionSep;
+
+    AlreadyAllocated[NextSectionAddr] = CurEntry.second;
+    Checker.getRTDyld().mapSectionAddress(CurEntry.first, NextSectionAddr);
+  }
+
+}
+
+// Load and link the objects specified on the command line, but do not execute
+// anything. Instead, attach a RuntimeDyldChecker instance and call it to
+// verify the correctness of the linked memory.
 static int linkAndVerify() {
 
   // Check for missing triple.
@@ -347,6 +514,9 @@ static int linkAndVerify() {
   // Instantiate a dynamic linker.
   TrivialMemoryManager MemMgr;
   RuntimeDyld Dyld(&MemMgr);
+  Dyld.setProcessAllSections(true);
+  RuntimeDyldChecker Checker(Dyld, Disassembler.get(), InstPrinter.get(),
+                             llvm::dbgs());
 
   // If we don't have any input files, read from stdin.
   if (!InputFileList.size())
@@ -355,24 +525,42 @@ static int linkAndVerify() {
     // Load the input memory buffer.
     ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
         MemoryBuffer::getFileOrSTDIN(InputFileList[i]);
+
     if (std::error_code EC = InputBuffer.getError())
       return Error("unable to read input: '" + EC.message() + "'");
 
-    std::unique_ptr<ObjectImage> LoadedObject;
+    ErrorOr<std::unique_ptr<ObjectFile>> MaybeObj(
+      ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));
+
+    if (std::error_code EC = MaybeObj.getError())
+      return Error("unable to create object file: '" + EC.message() + "'");
+
+    ObjectFile &Obj = **MaybeObj;
+
     // Load the object file
-    LoadedObject.reset(
-        Dyld.loadObject(new ObjectBuffer(InputBuffer.get().release())));
-    if (!LoadedObject) {
+    Dyld.loadObject(Obj);
+    if (Dyld.hasError()) {
       return Error(Dyld.getErrorString());
     }
   }
 
+  // Re-map the section addresses into the phony target address space.
+  remapSections(TheTriple, MemMgr, Checker);
+
   // Resolve all the relocations we can.
   Dyld.resolveRelocations();
 
-  RuntimeDyldChecker Checker(Dyld, Disassembler.get(), InstPrinter.get(),
-                             llvm::dbgs());
-  return checkAllExpressions(Checker);
+  // Register EH frames.
+  Dyld.registerEHFrames();
+
+  int ErrorCode = checkAllExpressions(Checker);
+  if (Dyld.hasError()) {
+    errs() << "RTDyld reported an error applying relocations:\n  "
+           << Dyld.getErrorString() << "\n";
+    ErrorCode = 1;
+  }
+
+  return ErrorCode;
 }
 
 int main(int argc, char **argv) {
diff --git a/tools/llvm-shlib/CMakeLists.txt b/tools/llvm-shlib/CMakeLists.txt
new file mode 100644
index 000000000000..a896a8a26b52
--- /dev/null
+++ b/tools/llvm-shlib/CMakeLists.txt
@@ -0,0 +1,100 @@
+# This tool creates a shared library from the LLVM libraries. Generating this
+# library is enabled by setting LLVM_BUILD_LLVM_DYLIB=yes on the CMake
+# commandline. By default the shared library only exports the LLVM C API.
+
+
+# You can configure which libraries from LLVM you want to include in the shared
+# library by setting LLVM_DYLIB_COMPONENTS to a semi-colon delimited list of
+# LLVM components. All compoenent names handled by llvm-config are valid.
+
+if(NOT DEFINED LLVM_DYLIB_COMPONENTS)
+  set(LLVM_DYLIB_COMPONENTS
+    ${LLVM_TARGETS_TO_BUILD}
+    Analysis
+    BitReader
+    BitWriter
+    CodeGen
+    Core
+    ExecutionEngine
+    IPA
+    IPO
+    IRReader
+    InstCombine
+    Instrumentation
+    Interpreter
+    Linker
+    MCDisassembler
+    MCJIT
+    ObjCARCOpts
+    Object
+    ScalarOpts
+    Support
+    Target
+    TransformUtils
+    Vectorize
+    native
+    )
+endif()
+
+add_definitions( -DLLVM_VERSION_INFO=\"${PACKAGE_VERSION}\" )
+
+set(SOURCES
+  libllvm.cpp
+  )
+
+if(NOT DEFINED LLVM_EXPORTED_SYMBOL_FILE)
+
+  if( WIN32 AND NOT CYGWIN )
+    message(FATAL_ERROR "Auto-generation not implemented for Win32 without GNU utils. Please specify LLVM_EXPORTED_SYMBOL_FILE.")
+  endif()
+
+  # To get the export list for a single llvm library:
+  # nm ${LIB_PATH} | awk "/T _LLVM/ { print $3 }" | sort -u | sed -e "s/^_//g" > ${LIB_PATH}.exports
+
+  set(LLVM_EXPORTED_SYMBOL_FILE ${CMAKE_BINARY_DIR}/libllvm.exports)
+
+  llvm_map_components_to_libnames(LIB_NAMES ${LLVM_DYLIB_COMPONENTS})
+
+  foreach (lib ${LIB_NAMES})
+    
+    set(LIB_DIR ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/lib${LLVM_LIBDIR_SUFFIX})
+    set(LIB_NAME ${LIB_DIR}/${CMAKE_STATIC_LIBRARY_PREFIX}${lib})
+    set(LIB_PATH ${LIB_NAME}${CMAKE_STATIC_LIBRARY_SUFFIX})
+    set(LIB_EXPORTS_PATH ${LIB_NAME}.exports)
+
+    list(APPEND LLVM_DYLIB_REQUIRED_EXPORTS ${LIB_EXPORTS_PATH})
+
+    add_custom_command(OUTPUT ${LIB_EXPORTS_PATH}
+      COMMAND nm ${LIB_PATH} | awk "/T _LLVM/ || /T LLVM/ { print $3 }" | sort -u | sed -e "s/^_//g" > ${LIB_EXPORTS_PATH}
+      WORKING_DIRECTORY ${LIB_DIR}
+      DEPENDS ${lib}
+      COMMENT "Generating Export list for ${lib}..."
+      VERBATIM )
+  endforeach ()
+
+  add_custom_command(OUTPUT ${LLVM_EXPORTED_SYMBOL_FILE}
+    COMMAND cat ${LLVM_DYLIB_REQUIRED_EXPORTS} > ${LLVM_EXPORTED_SYMBOL_FILE}
+    WORKING_DIRECTORY ${LIB_DIR}
+    DEPENDS ${LLVM_DYLIB_REQUIRED_EXPORTS}
+    COMMENT "Generating combined export list...")
+
+endif()
+
+add_llvm_library(LLVM SHARED ${SOURCES})
+
+if("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux") # FIXME: It should be "GNU ld for elf"
+  # GNU ld doesn't resolve symbols in the version script.
+  list(REMOVE_DUPLICATES LIB_NAMES)
+  set(LIB_NAMES -Wl,--whole-archive ${LIB_NAMES} -Wl,--no-whole-archive)
+endif()
+
+target_link_libraries(LLVM ${cmake_2_8_12_PRIVATE} ${LIB_NAMES})
+
+add_dependencies(LLVM ${LLVM_EXPORTED_SYMBOL_FILE})
+
+if (APPLE)
+  set_property(TARGET LLVM APPEND_STRING PROPERTY
+              LINK_FLAGS
+              " -compatibility_version ${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR} -current_version ${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}")
+endif()
+
diff --git a/tools/llvm-shlib/libllvm.cpp b/tools/llvm-shlib/libllvm.cpp
new file mode 100644
index 000000000000..8424d660c9d0
--- /dev/null
+++ b/tools/llvm-shlib/libllvm.cpp
@@ -0,0 +1,20 @@
+//===-libllvm.cpp - LLVM Shared Library -----------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is empty and serves only the purpose of making CMake happy because
+// you can't define a target with no sources.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Config/config.h"
+
+#if defined(DISABLE_LLVM_DYLIB_ATEXIT)
+extern "C" int __cxa_atexit();
+extern "C" int __cxa_atexit() { return 0; }
+#endif
diff --git a/tools/llvm-size/llvm-size.cpp b/tools/llvm-size/llvm-size.cpp
index 50b52200ff46..fc211e3180b4 100644
--- a/tools/llvm-size/llvm-size.cpp
+++ b/tools/llvm-size/llvm-size.cpp
@@ -15,9 +15,9 @@
 
 #include "llvm/ADT/APInt.h"
 #include "llvm/Object/Archive.h"
-#include "llvm/Object/ObjectFile.h"
 #include "llvm/Object/MachO.h"
 #include "llvm/Object/MachOUniversal.h"
+#include "llvm/Object/ObjectFile.h"
 #include "llvm/Support/Casting.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/FileSystem.h"
@@ -297,17 +297,13 @@ static void PrintObjectSectionSizes(ObjectFile *Obj) {
     std::size_t max_size_len = strlen("size");
     std::size_t max_addr_len = strlen("addr");
     for (const SectionRef &Section : Obj->sections()) {
-      uint64_t size = 0;
-      if (error(Section.getSize(size)))
-        return;
+      uint64_t size = Section.getSize();
       total += size;
 
       StringRef name;
-      uint64_t addr = 0;
       if (error(Section.getName(name)))
         return;
-      if (error(Section.getAddress(addr)))
-        return;
+      uint64_t addr = Section.getAddress();
       max_name_len = std::max(max_name_len, name.size());
       max_size_len = std::max(max_size_len, getNumLengthAsString(size));
       max_addr_len = std::max(max_addr_len, getNumLengthAsString(addr));
@@ -337,14 +333,10 @@ static void PrintObjectSectionSizes(ObjectFile *Obj) {
     // Print each section.
     for (const SectionRef &Section : Obj->sections()) {
       StringRef name;
-      uint64_t size = 0;
-      uint64_t addr = 0;
       if (error(Section.getName(name)))
         return;
-      if (error(Section.getSize(size)))
-        return;
-      if (error(Section.getAddress(addr)))
-        return;
+      uint64_t size = Section.getSize();
+      uint64_t addr = Section.getAddress();
       std::string namestr = name;
 
       outs() << format(fmt.str().c_str(), namestr.c_str(), size, addr);
@@ -365,18 +357,10 @@ static void PrintObjectSectionSizes(ObjectFile *Obj) {
 
     // Make one pass over the section table to calculate sizes.
     for (const SectionRef &Section : Obj->sections()) {
-      uint64_t size = 0;
-      bool isText = false;
-      bool isData = false;
-      bool isBSS = false;
-      if (error(Section.getSize(size)))
-        return;
-      if (error(Section.isText(isText)))
-        return;
-      if (error(Section.isData(isData)))
-        return;
-      if (error(Section.isBSS(isBSS)))
-        return;
+      uint64_t size = Section.getSize();
+      bool isText = Section.isText();
+      bool isData = Section.isData();
+      bool isBSS = Section.isBSS();
       if (isText)
         total_text += size;
       else if (isData)
@@ -444,8 +428,7 @@ static bool checkMachOAndArchFlags(ObjectFile *o, StringRef file) {
 static void PrintFileSectionSizes(StringRef file) {
   // If file is not stdin, check that it exists.
   if (file != "-") {
-    bool exists;
-    if (sys::fs::exists(file, exists) || !exists) {
+    if (!sys::fs::exists(file)) {
       errs() << ToolName << ": '" << file << "': "
              << "No such file\n";
       return;
@@ -453,14 +436,14 @@ static void PrintFileSectionSizes(StringRef file) {
   }
 
   // Attempt to open the binary.
-  ErrorOr<Binary *> BinaryOrErr = createBinary(file);
+  ErrorOr<OwningBinary<Binary>> BinaryOrErr = createBinary(file);
   if (std::error_code EC = BinaryOrErr.getError()) {
     errs() << ToolName << ": " << file << ": " << EC.message() << ".\n";
     return;
   }
-  std::unique_ptr<Binary> binary(BinaryOrErr.get());
+  Binary &Bin = *BinaryOrErr.get().getBinary();
 
-  if (Archive *a = dyn_cast<Archive>(binary.get())) {
+  if (Archive *a = dyn_cast<Archive>(&Bin)) {
     // This is an archive. Iterate over each member and display its sizes.
     for (object::Archive::child_iterator i = a->child_begin(),
                                          e = a->child_end();
@@ -488,7 +471,7 @@ static void PrintFileSectionSizes(StringRef file) {
       }
     }
   } else if (MachOUniversalBinary *UB =
-                 dyn_cast<MachOUniversalBinary>(binary.get())) {
+                 dyn_cast<MachOUniversalBinary>(&Bin)) {
     // If we have a list of architecture flags specified dump only those.
     if (!ArchAll && ArchFlags.size() != 0) {
       // Look for a slice in the universal binary that matches each ArchFlag.
@@ -501,7 +484,6 @@ static void PrintFileSectionSizes(StringRef file) {
           if (ArchFlags[i] == I->getArchTypeName()) {
             ArchFound = true;
             ErrorOr<std::unique_ptr<ObjectFile>> UO = I->getAsObjectFile();
-            std::unique_ptr<Archive> UA;
             if (UO) {
               if (ObjectFile *o = dyn_cast<ObjectFile>(&*UO.get())) {
                 MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(o);
@@ -520,7 +502,9 @@ static void PrintFileSectionSizes(StringRef file) {
                   outs() << "\n";
                 }
               }
-            } else if (!I->getAsArchive(UA)) {
+            } else if (ErrorOr<std::unique_ptr<Archive>> AOrErr =
+                           I->getAsArchive()) {
+              std::unique_ptr<Archive> &UA = *AOrErr;
               // This is an archive. Iterate over each member and display its
               // sizes.
               for (object::Archive::child_iterator i = UA->child_begin(),
@@ -577,7 +561,6 @@ static void PrintFileSectionSizes(StringRef file) {
            I != E; ++I) {
         if (HostArchName == I->getArchTypeName()) {
           ErrorOr<std::unique_ptr<ObjectFile>> UO = I->getAsObjectFile();
-          std::unique_ptr<Archive> UA;
           if (UO) {
             if (ObjectFile *o = dyn_cast<ObjectFile>(&*UO.get())) {
               MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(o);
@@ -596,7 +579,9 @@ static void PrintFileSectionSizes(StringRef file) {
                 outs() << "\n";
               }
             }
-          } else if (!I->getAsArchive(UA)) {
+          } else if (ErrorOr<std::unique_ptr<Archive>> AOrErr =
+                         I->getAsArchive()) {
+            std::unique_ptr<Archive> &UA = *AOrErr;
             // This is an archive. Iterate over each member and display its
             // sizes.
             for (object::Archive::child_iterator i = UA->child_begin(),
@@ -640,7 +625,6 @@ static void PrintFileSectionSizes(StringRef file) {
                                                E = UB->end_objects();
          I != E; ++I) {
       ErrorOr<std::unique_ptr<ObjectFile>> UO = I->getAsObjectFile();
-      std::unique_ptr<Archive> UA;
       if (UO) {
         if (ObjectFile *o = dyn_cast<ObjectFile>(&*UO.get())) {
           MachOObjectFile *MachO = dyn_cast<MachOObjectFile>(o);
@@ -660,7 +644,9 @@ static void PrintFileSectionSizes(StringRef file) {
             outs() << "\n";
           }
         }
-      } else if (!I->getAsArchive(UA)) {
+      } else if (ErrorOr<std::unique_ptr<Archive>> AOrErr =
+                         I->getAsArchive()) {
+        std::unique_ptr<Archive> &UA = *AOrErr;
         // This is an archive. Iterate over each member and display its sizes.
         for (object::Archive::child_iterator i = UA->child_begin(),
                                              e = UA->child_end();
@@ -692,7 +678,7 @@ static void PrintFileSectionSizes(StringRef file) {
         }
       }
     }
-  } else if (ObjectFile *o = dyn_cast<ObjectFile>(binary.get())) {
+  } else if (ObjectFile *o = dyn_cast<ObjectFile>(&Bin)) {
     if (!checkMachOAndArchFlags(o, file))
       return;
     if (OutputFormat == sysv)
@@ -731,8 +717,7 @@ int main(int argc, char **argv) {
     if (ArchFlags[i] == "all") {
       ArchAll = true;
     } else {
-      Triple T = MachOObjectFile::getArch(ArchFlags[i]);
-      if (T.getArch() == Triple::UnknownArch) {
+      if (!MachOObjectFile::isValidArch(ArchFlags[i])) {
         outs() << ToolName << ": for the -arch option: Unknown architecture "
                << "named '" << ArchFlags[i] << "'";
         return 1;
diff --git a/tools/llvm-stress/llvm-stress.cpp b/tools/llvm-stress/llvm-stress.cpp
index 23d3b636b190..21a79e3294a0 100644
--- a/tools/llvm-stress/llvm-stress.cpp
+++ b/tools/llvm-stress/llvm-stress.cpp
@@ -704,11 +704,10 @@ int main(int argc, char **argv) {
   if (OutputFilename.empty())
     OutputFilename = "-";
 
-  std::string ErrorInfo;
-  Out.reset(new tool_output_file(OutputFilename.c_str(), ErrorInfo,
-                                 sys::fs::F_None));
-  if (!ErrorInfo.empty()) {
-    errs() << ErrorInfo << '\n';
+  std::error_code EC;
+  Out.reset(new tool_output_file(OutputFilename, EC, sys::fs::F_None));
+  if (EC) {
+    errs() << EC.message() << '\n';
     return 1;
   }
 
diff --git a/tools/llvm-symbolizer/LLVMSymbolize.cpp b/tools/llvm-symbolizer/LLVMSymbolize.cpp
index c1d39efc1b81..36061d7e684f 100644
--- a/tools/llvm-symbolizer/LLVMSymbolize.cpp
+++ b/tools/llvm-symbolizer/LLVMSymbolize.cpp
@@ -45,8 +45,26 @@ getDILineInfoSpecifier(const LLVMSymbolizer::Options &Opts) {
 
 ModuleInfo::ModuleInfo(ObjectFile *Obj, DIContext *DICtx)
     : Module(Obj), DebugInfoContext(DICtx) {
+  std::unique_ptr<DataExtractor> OpdExtractor;
+  uint64_t OpdAddress = 0;
+  // Find the .opd (function descriptor) section if any, for big-endian
+  // PowerPC64 ELF.
+  if (Module->getArch() == Triple::ppc64) {
+    for (section_iterator Section : Module->sections()) {
+      StringRef Name;
+      if (!error(Section->getName(Name)) && Name == ".opd") {
+        StringRef Data;
+        if (!error(Section->getContents(Data))) {
+          OpdExtractor.reset(new DataExtractor(Data, Module->isLittleEndian(),
+                                               Module->getBytesInAddress()));
+          OpdAddress = Section->getAddress();
+        }
+        break;
+      }
+    }
+  }
   for (const SymbolRef &Symbol : Module->symbols()) {
-    addSymbol(Symbol);
+    addSymbol(Symbol, OpdExtractor.get(), OpdAddress);
   }
   bool NoSymbolTable = (Module->symbol_begin() == Module->symbol_end());
   if (NoSymbolTable && Module->isELF()) {
@@ -54,12 +72,13 @@ ModuleInfo::ModuleInfo(ObjectFile *Obj, DIContext *DICtx)
     std::pair<symbol_iterator, symbol_iterator> IDyn =
         getELFDynamicSymbolIterators(Module);
     for (symbol_iterator si = IDyn.first, se = IDyn.second; si != se; ++si) {
-      addSymbol(*si);
+      addSymbol(*si, OpdExtractor.get(), OpdAddress);
     }
   }
 }
 
-void ModuleInfo::addSymbol(const SymbolRef &Symbol) {
+void ModuleInfo::addSymbol(const SymbolRef &Symbol, DataExtractor *OpdExtractor,
+                           uint64_t OpdAddress) {
   SymbolRef::Type SymbolType;
   if (error(Symbol.getType(SymbolType)))
     return;
@@ -69,6 +88,18 @@ void ModuleInfo::addSymbol(const SymbolRef &Symbol) {
   if (error(Symbol.getAddress(SymbolAddress)) ||
       SymbolAddress == UnknownAddressOrSize)
     return;
+  if (OpdExtractor) {
+    // For big-endian PowerPC64 ELF, symbols in the .opd section refer to
+    // function descriptors. The first word of the descriptor is a pointer to
+    // the function's code.
+    // For the purposes of symbolization, pretend the symbol's address is that
+    // of the function's code, not the descriptor.
+    uint64_t OpdOffset = SymbolAddress - OpdAddress;
+    uint32_t OpdOffset32 = OpdOffset;
+    if (OpdOffset == OpdOffset32 && 
+        OpdExtractor->isValidOffsetForAddress(OpdOffset32))
+      SymbolAddress = OpdExtractor->getAddress(&OpdOffset32);
+  }
   uint64_t SymbolSize;
   // Getting symbol size is linear for Mach-O files, so assume that symbol
   // occupies the memory range up to the following symbol.
@@ -85,7 +116,7 @@ void ModuleInfo::addSymbol(const SymbolRef &Symbol) {
     SymbolName = SymbolName.drop_front();
   // FIXME: If a function has alias, there are two entries in symbol table
   // with same address size. Make sure we choose the correct one.
-  SymbolMapTy &M = SymbolType == SymbolRef::ST_Function ? Functions : Objects;
+  auto &M = SymbolType == SymbolRef::ST_Function ? Functions : Objects;
   SymbolDesc SD = { SymbolAddress, SymbolSize };
   M.insert(std::make_pair(SD, SymbolName));
 }
@@ -93,19 +124,20 @@ void ModuleInfo::addSymbol(const SymbolRef &Symbol) {
 bool ModuleInfo::getNameFromSymbolTable(SymbolRef::Type Type, uint64_t Address,
                                         std::string &Name, uint64_t &Addr,
                                         uint64_t &Size) const {
-  const SymbolMapTy &M = Type == SymbolRef::ST_Function ? Functions : Objects;
-  if (M.empty())
+  const auto &SymbolMap = Type == SymbolRef::ST_Function ? Functions : Objects;
+  if (SymbolMap.empty())
     return false;
   SymbolDesc SD = { Address, Address };
-  SymbolMapTy::const_iterator it = M.upper_bound(SD);
-  if (it == M.begin())
+  auto SymbolIterator = SymbolMap.upper_bound(SD);
+  if (SymbolIterator == SymbolMap.begin())
     return false;
-  --it;
-  if (it->first.Size != 0 && it->first.Addr + it->first.Size <= Address)
+  --SymbolIterator;
+  if (SymbolIterator->first.Size != 0 &&
+      SymbolIterator->first.Addr + SymbolIterator->first.Size <= Address)
     return false;
-  Name = it->second.str();
-  Addr = it->first.Addr;
-  Size = it->first.Size;
+  Name = SymbolIterator->second.str();
+  Addr = SymbolIterator->first.Addr;
+  Size = SymbolIterator->first.Size;
   return true;
 }
 
@@ -206,14 +238,21 @@ std::string LLVMSymbolizer::symbolizeData(const std::string &ModuleName,
 
 void LLVMSymbolizer::flush() {
   DeleteContainerSeconds(Modules);
-  BinaryForPath.clear();
+  ObjectPairForPathArch.clear();
   ObjectFileForArch.clear();
 }
 
-static std::string getDarwinDWARFResourceForPath(const std::string &Path) {
-  StringRef Basename = sys::path::filename(Path);
-  const std::string &DSymDirectory = Path + ".dSYM";
-  SmallString<16> ResourceName = StringRef(DSymDirectory);
+// For Path="/path/to/foo" and Basename="foo" assume that debug info is in
+// /path/to/foo.dSYM/Contents/Resources/DWARF/foo.
+// For Path="/path/to/bar.dSYM" and Basename="foo" assume that debug info is in
+// /path/to/bar.dSYM/Contents/Resources/DWARF/foo.
+static
+std::string getDarwinDWARFResourceForPath(
+    const std::string &Path, const std::string &Basename) {
+  SmallString<16> ResourceName = StringRef(Path);
+  if (sys::path::extension(Path) != ".dSYM") {
+    ResourceName += ".dSYM";
+  }
   sys::path::append(ResourceName, "Contents", "Resources", "DWARF");
   sys::path::append(ResourceName, Basename);
   return ResourceName.str();
@@ -264,9 +303,8 @@ static bool findDebugBinary(const std::string &OrigPath,
   return false;
 }
 
-static bool getGNUDebuglinkContents(const Binary *Bin, std::string &DebugName,
+static bool getGNUDebuglinkContents(const ObjectFile *Obj, std::string &DebugName,
                                     uint32_t &CRCHash) {
-  const ObjectFile *Obj = dyn_cast<ObjectFile>(Bin);
   if (!Obj)
     return false;
   for (const SectionRef &Section : Obj->sections()) {
@@ -293,60 +331,96 @@ static bool getGNUDebuglinkContents(const Binary *Bin, std::string &DebugName,
   return false;
 }
 
-LLVMSymbolizer::BinaryPair
-LLVMSymbolizer::getOrCreateBinary(const std::string &Path) {
-  BinaryMapTy::iterator I = BinaryForPath.find(Path);
-  if (I != BinaryForPath.end())
+static
+bool darwinDsymMatchesBinary(const MachOObjectFile *DbgObj,
+                             const MachOObjectFile *Obj) {
+  ArrayRef<uint8_t> dbg_uuid = DbgObj->getUuid();
+  ArrayRef<uint8_t> bin_uuid = Obj->getUuid();
+  if (dbg_uuid.empty() || bin_uuid.empty())
+    return false;
+  return !memcmp(dbg_uuid.data(), bin_uuid.data(), dbg_uuid.size());
+}
+
+ObjectFile *LLVMSymbolizer::lookUpDsymFile(const std::string &ExePath,
+    const MachOObjectFile *MachExeObj, const std::string &ArchName) {
+  // On Darwin we may find DWARF in separate object file in
+  // resource directory.
+  std::vector<std::string> DsymPaths;
+  StringRef Filename = sys::path::filename(ExePath);
+  DsymPaths.push_back(getDarwinDWARFResourceForPath(ExePath, Filename));
+  for (const auto &Path : Opts.DsymHints) {
+    DsymPaths.push_back(getDarwinDWARFResourceForPath(Path, Filename));
+  }
+  for (const auto &path : DsymPaths) {
+    ErrorOr<OwningBinary<Binary>> BinaryOrErr = createBinary(path);
+    std::error_code EC = BinaryOrErr.getError();
+    if (EC != errc::no_such_file_or_directory && !error(EC)) {
+      OwningBinary<Binary> B = std::move(BinaryOrErr.get());
+      ObjectFile *DbgObj =
+          getObjectFileFromBinary(B.getBinary(), ArchName);
+      const MachOObjectFile *MachDbgObj =
+          dyn_cast<const MachOObjectFile>(DbgObj);
+      if (!MachDbgObj) continue;
+      if (darwinDsymMatchesBinary(MachDbgObj, MachExeObj)) {
+        addOwningBinary(std::move(B));
+        return DbgObj; 
+      }
+    }
+  }
+  return nullptr;
+}
+
+LLVMSymbolizer::ObjectPair
+LLVMSymbolizer::getOrCreateObjects(const std::string &Path,
+                                   const std::string &ArchName) {
+  const auto &I = ObjectPairForPathArch.find(std::make_pair(Path, ArchName));
+  if (I != ObjectPairForPathArch.end())
     return I->second;
-  Binary *Bin = nullptr;
-  Binary *DbgBin = nullptr;
-  ErrorOr<Binary *> BinaryOrErr = createBinary(Path);
+  ObjectFile *Obj = nullptr;
+  ObjectFile *DbgObj = nullptr;
+  ErrorOr<OwningBinary<Binary>> BinaryOrErr = createBinary(Path);
   if (!error(BinaryOrErr.getError())) {
-    std::unique_ptr<Binary> ParsedBinary(BinaryOrErr.get());
-    // Check if it's a universal binary.
-    Bin = ParsedBinary.get();
-    ParsedBinariesAndObjects.push_back(std::move(ParsedBinary));
-    if (Bin->isMachO() || Bin->isMachOUniversalBinary()) {
-      // On Darwin we may find DWARF in separate object file in
-      // resource directory.
-      const std::string &ResourcePath =
-          getDarwinDWARFResourceForPath(Path);
-      BinaryOrErr = createBinary(ResourcePath);
-      std::error_code EC = BinaryOrErr.getError();
-      if (EC != errc::no_such_file_or_directory && !error(EC)) {
-        DbgBin = BinaryOrErr.get();
-        ParsedBinariesAndObjects.push_back(std::unique_ptr<Binary>(DbgBin));
-      }
+    OwningBinary<Binary> &B = BinaryOrErr.get();
+    Obj = getObjectFileFromBinary(B.getBinary(), ArchName);
+    if (!Obj) {
+      ObjectPair Res = std::make_pair(nullptr, nullptr);
+      ObjectPairForPathArch[std::make_pair(Path, ArchName)] = Res;
+      return Res;
     }
+    addOwningBinary(std::move(B));
+    if (auto MachObj = dyn_cast<const MachOObjectFile>(Obj))
+      DbgObj = lookUpDsymFile(Path, MachObj, ArchName);
     // Try to locate the debug binary using .gnu_debuglink section.
-    if (!DbgBin) {
+    if (!DbgObj) {
       std::string DebuglinkName;
       uint32_t CRCHash;
       std::string DebugBinaryPath;
-      if (getGNUDebuglinkContents(Bin, DebuglinkName, CRCHash) &&
+      if (getGNUDebuglinkContents(Obj, DebuglinkName, CRCHash) &&
           findDebugBinary(Path, DebuglinkName, CRCHash, DebugBinaryPath)) {
         BinaryOrErr = createBinary(DebugBinaryPath);
         if (!error(BinaryOrErr.getError())) {
-          DbgBin = BinaryOrErr.get();
-          ParsedBinariesAndObjects.push_back(std::unique_ptr<Binary>(DbgBin));
+          OwningBinary<Binary> B = std::move(BinaryOrErr.get());
+          DbgObj = getObjectFileFromBinary(B.getBinary(), ArchName);
+          addOwningBinary(std::move(B));
         }
       }
     }
   }
-  if (!DbgBin)
-    DbgBin = Bin;
-  BinaryPair Res = std::make_pair(Bin, DbgBin);
-  BinaryForPath[Path] = Res;
+  if (!DbgObj)
+    DbgObj = Obj;
+  ObjectPair Res = std::make_pair(Obj, DbgObj);
+  ObjectPairForPathArch[std::make_pair(Path, ArchName)] = Res;
   return Res;
 }
 
 ObjectFile *
-LLVMSymbolizer::getObjectFileFromBinary(Binary *Bin, const std::string &ArchName) {
+LLVMSymbolizer::getObjectFileFromBinary(Binary *Bin,
+                                        const std::string &ArchName) {
   if (!Bin)
     return nullptr;
   ObjectFile *Res = nullptr;
   if (MachOUniversalBinary *UB = dyn_cast<MachOUniversalBinary>(Bin)) {
-    ObjectFileForArchMapTy::iterator I = ObjectFileForArch.find(
+    const auto &I = ObjectFileForArch.find(
         std::make_pair(UB, ArchName));
     if (I != ObjectFileForArch.end())
       return I->second;
@@ -365,7 +439,7 @@ LLVMSymbolizer::getObjectFileFromBinary(Binary *Bin, const std::string &ArchName
 
 ModuleInfo *
 LLVMSymbolizer::getOrCreateModuleInfo(const std::string &ModuleName) {
-  ModuleMapTy::iterator I = Modules.find(ModuleName);
+  const auto &I = Modules.find(ModuleName);
   if (I != Modules.end())
     return I->second;
   std::string BinaryName = ModuleName;
@@ -379,18 +453,16 @@ LLVMSymbolizer::getOrCreateModuleInfo(const std::string &ModuleName) {
       ArchName = ArchStr;
     }
   }
-  BinaryPair Binaries = getOrCreateBinary(BinaryName);
-  ObjectFile *Obj = getObjectFileFromBinary(Binaries.first, ArchName);
-  ObjectFile *DbgObj = getObjectFileFromBinary(Binaries.second, ArchName);
+  ObjectPair Objects = getOrCreateObjects(BinaryName, ArchName);
 
-  if (!Obj) {
+  if (!Objects.first) {
     // Failed to find valid object file.
     Modules.insert(make_pair(ModuleName, (ModuleInfo *)nullptr));
     return nullptr;
   }
-  DIContext *Context = DIContext::getDWARFContext(DbgObj);
+  DIContext *Context = DIContext::getDWARFContext(*Objects.second);
   assert(Context);
-  ModuleInfo *Info = new ModuleInfo(Obj, Context);
+  ModuleInfo *Info = new ModuleInfo(Objects.first, Context);
   Modules.insert(make_pair(ModuleName, Info));
   return Info;
 }
diff --git a/tools/llvm-symbolizer/LLVMSymbolize.h b/tools/llvm-symbolizer/LLVMSymbolize.h
index 45febe07847c..ff848fceb242 100644
--- a/tools/llvm-symbolizer/LLVMSymbolize.h
+++ b/tools/llvm-symbolizer/LLVMSymbolize.h
@@ -10,13 +10,14 @@
 // Header for LLVM symbolization library.
 //
 //===----------------------------------------------------------------------===//
-#ifndef LLVM_SYMBOLIZE_H
-#define LLVM_SYMBOLIZE_H
+#ifndef LLVM_TOOLS_LLVM_SYMBOLIZER_LLVMSYMBOLIZE_H
+#define LLVM_TOOLS_LLVM_SYMBOLIZER_LLVMSYMBOLIZE_H
 
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/DebugInfo/DIContext.h"
 #include "llvm/Object/MachOUniversal.h"
 #include "llvm/Object/ObjectFile.h"
+#include "llvm/Support/DataExtractor.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include <map>
 #include <memory>
@@ -39,13 +40,14 @@ public:
     bool PrintInlining : 1;
     bool Demangle : 1;
     std::string DefaultArch;
+    std::vector<std::string> DsymHints;
     Options(bool UseSymbolTable = true,
             FunctionNameKind PrintFunctions = FunctionNameKind::LinkageName,
             bool PrintInlining = true, bool Demangle = true,
             std::string DefaultArch = "")
-        : UseSymbolTable(UseSymbolTable), PrintFunctions(PrintFunctions),
-          PrintInlining(PrintInlining), Demangle(Demangle),
-          DefaultArch(DefaultArch) {}
+        : UseSymbolTable(UseSymbolTable),
+          PrintFunctions(PrintFunctions), PrintInlining(PrintInlining),
+          Demangle(Demangle), DefaultArch(DefaultArch) {}
   };
 
   LLVMSymbolizer(const Options &Opts = Options()) : Opts(Opts) {}
@@ -62,11 +64,15 @@ public:
   void flush();
   static std::string DemangleName(const std::string &Name);
 private:
-  typedef std::pair<Binary*, Binary*> BinaryPair;
+  typedef std::pair<ObjectFile*, ObjectFile*> ObjectPair;
 
   ModuleInfo *getOrCreateModuleInfo(const std::string &ModuleName);
-  /// \brief Returns pair of pointers to binary and debug binary.
-  BinaryPair getOrCreateBinary(const std::string &Path);
+  ObjectFile *lookUpDsymFile(const std::string &Path, const MachOObjectFile *ExeObj,
+                             const std::string &ArchName);
+
+  /// \brief Returns pair of pointers to object and debug object.
+  ObjectPair getOrCreateObjects(const std::string &Path,
+                                const std::string &ArchName);
   /// \brief Returns a parsed object file for a given architecture in a
   /// universal binary (or the binary itself if it is an object file).
   ObjectFile *getObjectFileFromBinary(Binary *Bin, const std::string &ArchName);
@@ -75,14 +81,21 @@ private:
 
   // Owns all the parsed binaries and object files.
   SmallVector<std::unique_ptr<Binary>, 4> ParsedBinariesAndObjects;
+  SmallVector<std::unique_ptr<MemoryBuffer>, 4> MemoryBuffers;
+  void addOwningBinary(OwningBinary<Binary> OwningBin) {
+    std::unique_ptr<Binary> Bin;
+    std::unique_ptr<MemoryBuffer> MemBuf;
+    std::tie(Bin, MemBuf) = OwningBin.takeBinary();
+    ParsedBinariesAndObjects.push_back(std::move(Bin));
+    MemoryBuffers.push_back(std::move(MemBuf));
+  }
+
   // Owns module info objects.
-  typedef std::map<std::string, ModuleInfo *> ModuleMapTy;
-  ModuleMapTy Modules;
-  typedef std::map<std::string, BinaryPair> BinaryMapTy;
-  BinaryMapTy BinaryForPath;
-  typedef std::map<std::pair<MachOUniversalBinary *, std::string>, ObjectFile *>
-      ObjectFileForArchMapTy;
-  ObjectFileForArchMapTy ObjectFileForArch;
+  std::map<std::string, ModuleInfo *> Modules;
+  std::map<std::pair<MachOUniversalBinary *, std::string>, ObjectFile *>
+      ObjectFileForArch;
+  std::map<std::pair<std::string, std::string>, ObjectPair>
+      ObjectPairForPathArch;
 
   Options Opts;
   static const char kBadString[];
@@ -103,7 +116,11 @@ private:
   bool getNameFromSymbolTable(SymbolRef::Type Type, uint64_t Address,
                               std::string &Name, uint64_t &Addr,
                               uint64_t &Size) const;
-  void addSymbol(const SymbolRef &Symbol);
+  // For big-endian PowerPC64 ELF, OpdAddress is the address of the .opd
+  // (function descriptor) section and OpdExtractor refers to its contents.
+  void addSymbol(const SymbolRef &Symbol,
+                 DataExtractor *OpdExtractor = nullptr,
+                 uint64_t OpdAddress = 0);
   ObjectFile *Module;
   std::unique_ptr<DIContext> DebugInfoContext;
 
@@ -116,12 +133,11 @@ private:
       return s1.Addr < s2.Addr;
     }
   };
-  typedef std::map<SymbolDesc, StringRef> SymbolMapTy;
-  SymbolMapTy Functions;
-  SymbolMapTy Objects;
+  std::map<SymbolDesc, StringRef> Functions;
+  std::map<SymbolDesc, StringRef> Objects;
 };
 
 } // namespace symbolize
 } // namespace llvm
 
-#endif // LLVM_SYMBOLIZE_H
+#endif
diff --git a/tools/llvm-symbolizer/llvm-symbolizer.cpp b/tools/llvm-symbolizer/llvm-symbolizer.cpp
index 29db172531ba..d554022e450c 100644
--- a/tools/llvm-symbolizer/llvm-symbolizer.cpp
+++ b/tools/llvm-symbolizer/llvm-symbolizer.cpp
@@ -19,6 +19,7 @@
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Debug.h"
+#include "llvm/Support/FileSystem.h"
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/PrettyStackTrace.h"
 #include "llvm/Support/Signals.h"
@@ -61,6 +62,11 @@ ClBinaryName("obj", cl::init(""),
              cl::desc("Path to object file to be symbolized (if not provided, "
                       "object file should be specified for each input line)"));
 
+static cl::list<std::string>
+ClDsymHint("dsym-hint", cl::ZeroOrMore,
+           cl::desc("Path to .dSYM bundles to search for debug info for the "
+                    "object files"));
+
 static bool parseCommand(bool &IsData, std::string &ModuleName,
                          uint64_t &ModuleOffset) {
   const char *kDataCmd = "DATA ";
@@ -119,6 +125,14 @@ int main(int argc, char **argv) {
   cl::ParseCommandLineOptions(argc, argv, "llvm-symbolizer\n");
   LLVMSymbolizer::Options Opts(ClUseSymbolTable, ClPrintFunctions,
                                ClPrintInlining, ClDemangle, ClDefaultArch);
+  for (const auto &hint : ClDsymHint) {
+    if (sys::path::extension(hint) == ".dSYM") {
+      Opts.DsymHints.push_back(hint);
+    } else {
+      errs() << "Warning: invalid dSYM hint: \"" << hint <<
+                "\" (must have the '.dSYM' extension).\n";
+    }
+  }
   LLVMSymbolizer Symbolizer(Opts);
 
   bool IsData = false;
diff --git a/tools/llvm-vtabledump/CMakeLists.txt b/tools/llvm-vtabledump/CMakeLists.txt
new file mode 100644
index 000000000000..4fe205b6efd4
--- /dev/null
+++ b/tools/llvm-vtabledump/CMakeLists.txt
@@ -0,0 +1,10 @@
+set(LLVM_LINK_COMPONENTS
+  ${LLVM_TARGETS_TO_BUILD}
+  Object
+  Support
+  )
+
+add_llvm_tool(llvm-vtabledump
+  llvm-vtabledump.cpp
+  Error.cpp
+  )
diff --git a/tools/llvm-vtabledump/Error.cpp b/tools/llvm-vtabledump/Error.cpp
new file mode 100644
index 000000000000..c5de8951636d
--- /dev/null
+++ b/tools/llvm-vtabledump/Error.cpp
@@ -0,0 +1,43 @@
+//===- Error.cpp - system_error extensions for llvm-vtabledump --*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This defines a new error_category for the llvm-vtabledump tool.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Error.h"
+#include "llvm/Support/ErrorHandling.h"
+
+using namespace llvm;
+
+namespace {
+class vtabledump_error_category : public std::error_category {
+public:
+  const char *name() const LLVM_NOEXCEPT override { return "llvm.vtabledump"; }
+  std::string message(int ev) const override {
+    switch (static_cast<vtabledump_error>(ev)) {
+    case vtabledump_error::success:
+      return "Success";
+    case vtabledump_error::file_not_found:
+      return "No such file.";
+    case vtabledump_error::unrecognized_file_format:
+      return "Unrecognized file type.";
+    }
+    llvm_unreachable(
+        "An enumerator of vtabledump_error does not have a message defined.");
+  }
+};
+} // namespace
+
+namespace llvm {
+const std::error_category &vtabledump_category() {
+  static vtabledump_error_category o;
+  return o;
+}
+} // namespace llvm
diff --git a/tools/llvm-vtabledump/Error.h b/tools/llvm-vtabledump/Error.h
new file mode 100644
index 000000000000..fd8bb18994df
--- /dev/null
+++ b/tools/llvm-vtabledump/Error.h
@@ -0,0 +1,39 @@
+//===- Error.h - system_error extensions for llvm-vtabledump ----*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This declares a new error_category for the llvm-vtabledump tool.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TOOLS_LLVM_VTABLEDUMP_ERROR_H
+#define LLVM_TOOLS_LLVM_VTABLEDUMP_ERROR_H
+
+#include <system_error>
+
+namespace llvm {
+const std::error_category &vtabledump_category();
+
+enum class vtabledump_error {
+  success = 0,
+  file_not_found,
+  unrecognized_file_format,
+};
+
+inline std::error_code make_error_code(vtabledump_error e) {
+  return std::error_code(static_cast<int>(e), vtabledump_category());
+}
+
+} // namespace llvm
+
+namespace std {
+template <>
+struct is_error_code_enum<llvm::vtabledump_error> : std::true_type {};
+}
+
+#endif
diff --git a/tools/llvm-vtabledump/LLVMBuild.txt b/tools/llvm-vtabledump/LLVMBuild.txt
new file mode 100644
index 000000000000..6a3cbfff4c13
--- /dev/null
+++ b/tools/llvm-vtabledump/LLVMBuild.txt
@@ -0,0 +1,22 @@
+;===- ./tools/llvm-vtabledump/LLVMBuild.txt --------------------*- Conf -*--===;
+;
+;                     The LLVM Compiler Infrastructure
+;
+; This file is distributed under the University of Illinois Open Source
+; License. See LICENSE.TXT for details.
+;
+;===------------------------------------------------------------------------===;
+;
+; This is an LLVMBuild description file for the components in this subdirectory.
+;
+; For more information on the LLVMBuild system, please see:
+;
+;   http://llvm.org/docs/LLVMBuild.html
+;
+;===------------------------------------------------------------------------===;
+
+[component_0]
+type = Tool
+name = llvm-vtabledump
+parent = Tools
+required_libraries = all-targets BitReader Object
diff --git a/tools/llvm-vtabledump/Makefile b/tools/llvm-vtabledump/Makefile
new file mode 100644
index 000000000000..596c64c67b6b
--- /dev/null
+++ b/tools/llvm-vtabledump/Makefile
@@ -0,0 +1,18 @@
+##===- tools/llvm-vtabledump/Makefile ----------------------*- Makefile -*-===##
+# 
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+# 
+##===----------------------------------------------------------------------===##
+
+LEVEL := ../..
+TOOLNAME := llvm-vtabledump
+LINK_COMPONENTS := bitreader object all-targets
+
+# This tool has no plugins, optimize startup time.
+TOOL_NO_EXPORTS := 1
+
+include $(LEVEL)/Makefile.common
+
diff --git a/tools/llvm-vtabledump/llvm-vtabledump.cpp b/tools/llvm-vtabledump/llvm-vtabledump.cpp
new file mode 100644
index 000000000000..a21acae02c3a
--- /dev/null
+++ b/tools/llvm-vtabledump/llvm-vtabledump.cpp
@@ -0,0 +1,464 @@
+//===- llvm-vtabledump.cpp - Dump vtables in an Object File -----*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Dumps VTables resident in object files and archives.  Note, it currently only
+// supports MS-ABI style object files.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm-vtabledump.h"
+#include "Error.h"
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/Object/Archive.h"
+#include "llvm/Object/ObjectFile.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/Endian.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/Signals.h"
+#include "llvm/Support/TargetRegistry.h"
+#include "llvm/Support/TargetSelect.h"
+#include <map>
+#include <string>
+#include <system_error>
+
+using namespace llvm;
+using namespace llvm::object;
+using namespace llvm::support;
+
+namespace opts {
+cl::list<std::string> InputFilenames(cl::Positional,
+                                     cl::desc("<input object files>"),
+                                     cl::ZeroOrMore);
+} // namespace opts
+
+static int ReturnValue = EXIT_SUCCESS;
+
+namespace llvm {
+
+bool error(std::error_code EC) {
+  if (!EC)
+    return false;
+
+  ReturnValue = EXIT_FAILURE;
+  outs() << "\nError reading file: " << EC.message() << ".\n";
+  outs().flush();
+  return true;
+}
+
+} // namespace llvm
+
+static void reportError(StringRef Input, StringRef Message) {
+  if (Input == "-")
+    Input = "<stdin>";
+
+  errs() << Input << ": " << Message << "\n";
+  errs().flush();
+  ReturnValue = EXIT_FAILURE;
+}
+
+static void reportError(StringRef Input, std::error_code EC) {
+  reportError(Input, EC.message());
+}
+
+static SmallVectorImpl<SectionRef> &getRelocSections(const ObjectFile *Obj,
+                                                     const SectionRef &Sec) {
+  static bool MappingDone = false;
+  static std::map<SectionRef, SmallVector<SectionRef, 1>> SectionRelocMap;
+  if (!MappingDone) {
+    for (const SectionRef &Section : Obj->sections()) {
+      section_iterator Sec2 = Section.getRelocatedSection();
+      if (Sec2 != Obj->section_end())
+        SectionRelocMap[*Sec2].push_back(Section);
+    }
+    MappingDone = true;
+  }
+  return SectionRelocMap[Sec];
+}
+
+static bool collectRelocatedSymbols(const ObjectFile *Obj,
+                                    const SectionRef &Sec, uint64_t SecAddress,
+                                    uint64_t SymAddress, uint64_t SymSize,
+                                    StringRef *I, StringRef *E) {
+  uint64_t SymOffset = SymAddress - SecAddress;
+  uint64_t SymEnd = SymOffset + SymSize;
+  for (const SectionRef &SR : getRelocSections(Obj, Sec)) {
+    for (const object::RelocationRef &Reloc : SR.relocations()) {
+      if (I == E)
+        break;
+      const object::symbol_iterator RelocSymI = Reloc.getSymbol();
+      if (RelocSymI == Obj->symbol_end())
+        continue;
+      StringRef RelocSymName;
+      if (error(RelocSymI->getName(RelocSymName)))
+        return true;
+      uint64_t Offset;
+      if (error(Reloc.getOffset(Offset)))
+        return true;
+      if (Offset >= SymOffset && Offset < SymEnd) {
+        *I = RelocSymName;
+        ++I;
+      }
+    }
+  }
+  return false;
+}
+
+static bool collectRelocationOffsets(
+    const ObjectFile *Obj, const SectionRef &Sec, uint64_t SecAddress,
+    uint64_t SymAddress, uint64_t SymSize, StringRef SymName,
+    std::map<std::pair<StringRef, uint64_t>, StringRef> &Collection) {
+  uint64_t SymOffset = SymAddress - SecAddress;
+  uint64_t SymEnd = SymOffset + SymSize;
+  for (const SectionRef &SR : getRelocSections(Obj, Sec)) {
+    for (const object::RelocationRef &Reloc : SR.relocations()) {
+      const object::symbol_iterator RelocSymI = Reloc.getSymbol();
+      if (RelocSymI == Obj->symbol_end())
+        continue;
+      StringRef RelocSymName;
+      if (error(RelocSymI->getName(RelocSymName)))
+        return true;
+      uint64_t Offset;
+      if (error(Reloc.getOffset(Offset)))
+        return true;
+      if (Offset >= SymOffset && Offset < SymEnd)
+        Collection[std::make_pair(SymName, Offset - SymOffset)] = RelocSymName;
+    }
+  }
+  return false;
+}
+
+static void dumpVTables(const ObjectFile *Obj) {
+  struct CompleteObjectLocator {
+    StringRef Symbols[2];
+    ArrayRef<little32_t> Data;
+  };
+  struct ClassHierarchyDescriptor {
+    StringRef Symbols[1];
+    ArrayRef<little32_t> Data;
+  };
+  struct BaseClassDescriptor {
+    StringRef Symbols[2];
+    ArrayRef<little32_t> Data;
+  };
+  struct TypeDescriptor {
+    StringRef Symbols[1];
+    uint64_t AlwaysZero;
+    StringRef MangledName;
+  };
+  std::map<std::pair<StringRef, uint64_t>, StringRef> VFTableEntries;
+  std::map<StringRef, ArrayRef<little32_t>> VBTables;
+  std::map<StringRef, CompleteObjectLocator> COLs;
+  std::map<StringRef, ClassHierarchyDescriptor> CHDs;
+  std::map<std::pair<StringRef, uint64_t>, StringRef> BCAEntries;
+  std::map<StringRef, BaseClassDescriptor> BCDs;
+  std::map<StringRef, TypeDescriptor> TDs;
+
+  std::map<std::pair<StringRef, uint64_t>, StringRef> VTableSymEntries;
+  std::map<std::pair<StringRef, uint64_t>, int64_t> VTableDataEntries;
+  std::map<std::pair<StringRef, uint64_t>, StringRef> VTTEntries;
+  std::map<StringRef, StringRef> TINames;
+
+  uint8_t BytesInAddress = Obj->getBytesInAddress();
+
+  for (const object::SymbolRef &Sym : Obj->symbols()) {
+    StringRef SymName;
+    if (error(Sym.getName(SymName)))
+      return;
+    object::section_iterator SecI(Obj->section_begin());
+    if (error(Sym.getSection(SecI)))
+      return;
+    // Skip external symbols.
+    if (SecI == Obj->section_end())
+      continue;
+    const SectionRef &Sec = *SecI;
+    // Skip virtual or BSS sections.
+    if (Sec.isBSS() || Sec.isVirtual())
+      continue;
+    StringRef SecContents;
+    if (error(Sec.getContents(SecContents)))
+      return;
+    uint64_t SymAddress, SymSize;
+    if (error(Sym.getAddress(SymAddress)) || error(Sym.getSize(SymSize)))
+      return;
+    uint64_t SecAddress = Sec.getAddress();
+    uint64_t SecSize = Sec.getSize();
+    uint64_t SymOffset = SymAddress - SecAddress;
+    StringRef SymContents = SecContents.substr(SymOffset, SymSize);
+
+    // VFTables in the MS-ABI start with '??_7' and are contained within their
+    // own COMDAT section.  We then determine the contents of the VFTable by
+    // looking at each relocation in the section.
+    if (SymName.startswith("??_7")) {
+      // Each relocation either names a virtual method or a thunk.  We note the
+      // offset into the section and the symbol used for the relocation.
+      collectRelocationOffsets(Obj, Sec, SecAddress, SecAddress, SecSize,
+                               SymName, VFTableEntries);
+    }
+    // VBTables in the MS-ABI start with '??_8' and are filled with 32-bit
+    // offsets of virtual bases.
+    else if (SymName.startswith("??_8")) {
+      ArrayRef<little32_t> VBTableData(
+          reinterpret_cast<const little32_t *>(SymContents.data()),
+          SymContents.size() / sizeof(little32_t));
+      VBTables[SymName] = VBTableData;
+    }
+    // Complete object locators in the MS-ABI start with '??_R4'
+    else if (SymName.startswith("??_R4")) {
+      CompleteObjectLocator COL;
+      COL.Data = ArrayRef<little32_t>(
+          reinterpret_cast<const little32_t *>(SymContents.data()), 3);
+      StringRef *I = std::begin(COL.Symbols), *E = std::end(COL.Symbols);
+      if (collectRelocatedSymbols(Obj, Sec, SecAddress, SymAddress, SymSize, I,
+                                  E))
+        return;
+      COLs[SymName] = COL;
+    }
+    // Class hierarchy descriptors in the MS-ABI start with '??_R3'
+    else if (SymName.startswith("??_R3")) {
+      ClassHierarchyDescriptor CHD;
+      CHD.Data = ArrayRef<little32_t>(
+          reinterpret_cast<const little32_t *>(SymContents.data()), 3);
+      StringRef *I = std::begin(CHD.Symbols), *E = std::end(CHD.Symbols);
+      if (collectRelocatedSymbols(Obj, Sec, SecAddress, SymAddress, SymSize, I,
+                                  E))
+        return;
+      CHDs[SymName] = CHD;
+    }
+    // Class hierarchy descriptors in the MS-ABI start with '??_R2'
+    else if (SymName.startswith("??_R2")) {
+      // Each relocation names a base class descriptor.  We note the offset into
+      // the section and the symbol used for the relocation.
+      collectRelocationOffsets(Obj, Sec, SecAddress, SymAddress, SymSize,
+                               SymName, BCAEntries);
+    }
+    // Base class descriptors in the MS-ABI start with '??_R1'
+    else if (SymName.startswith("??_R1")) {
+      BaseClassDescriptor BCD;
+      BCD.Data = ArrayRef<little32_t>(
+          reinterpret_cast<const little32_t *>(SymContents.data()) + 1, 5);
+      StringRef *I = std::begin(BCD.Symbols), *E = std::end(BCD.Symbols);
+      if (collectRelocatedSymbols(Obj, Sec, SecAddress, SymAddress, SymSize, I,
+                                  E))
+        return;
+      BCDs[SymName] = BCD;
+    }
+    // Type descriptors in the MS-ABI start with '??_R0'
+    else if (SymName.startswith("??_R0")) {
+      const char *DataPtr = SymContents.drop_front(BytesInAddress).data();
+      TypeDescriptor TD;
+      if (BytesInAddress == 8)
+        TD.AlwaysZero = *reinterpret_cast<const little64_t *>(DataPtr);
+      else
+        TD.AlwaysZero = *reinterpret_cast<const little32_t *>(DataPtr);
+      TD.MangledName = SymContents.drop_front(BytesInAddress * 2);
+      StringRef *I = std::begin(TD.Symbols), *E = std::end(TD.Symbols);
+      if (collectRelocatedSymbols(Obj, Sec, SecAddress, SymAddress, SymSize, I,
+                                  E))
+        return;
+      TDs[SymName] = TD;
+    }
+    // Construction vtables in the Itanium ABI start with '_ZTT' or '__ZTT'.
+    else if (SymName.startswith("_ZTT") || SymName.startswith("__ZTT")) {
+      collectRelocationOffsets(Obj, Sec, SecAddress, SymAddress, SymSize,
+                               SymName, VTTEntries);
+    }
+    // Typeinfo names in the Itanium ABI start with '_ZTS' or '__ZTS'.
+    else if (SymName.startswith("_ZTS") || SymName.startswith("__ZTS")) {
+      TINames[SymName] = SymContents.slice(0, SymContents.find('\0'));
+    }
+    // Vtables in the Itanium ABI start with '_ZTV' or '__ZTV'.
+    else if (SymName.startswith("_ZTV") || SymName.startswith("__ZTV")) {
+      collectRelocationOffsets(Obj, Sec, SecAddress, SymAddress, SymSize,
+                               SymName, VTableSymEntries);
+      for (uint64_t SymOffI = 0; SymOffI < SymSize; SymOffI += BytesInAddress) {
+        auto Key = std::make_pair(SymName, SymOffI);
+        if (VTableSymEntries.count(Key))
+          continue;
+        const char *DataPtr = SymContents.substr(SymOffI, BytesInAddress).data();
+        int64_t VData;
+        if (BytesInAddress == 8)
+          VData = *reinterpret_cast<const little64_t *>(DataPtr);
+        else
+          VData = *reinterpret_cast<const little32_t *>(DataPtr);
+        VTableDataEntries[Key] = VData;
+      }
+    }
+    // Typeinfo structures in the Itanium ABI start with '_ZTI' or '__ZTI'.
+    else if (SymName.startswith("_ZTI") || SymName.startswith("__ZTI")) {
+      // FIXME: Do something with these!
+    }
+  }
+  for (const std::pair<std::pair<StringRef, uint64_t>, StringRef> &VFTableEntry :
+       VFTableEntries) {
+    StringRef VFTableName = VFTableEntry.first.first;
+    uint64_t Offset = VFTableEntry.first.second;
+    StringRef SymName = VFTableEntry.second;
+    outs() << VFTableName << '[' << Offset << "]: " << SymName << '\n';
+  }
+  for (const std::pair<StringRef, ArrayRef<little32_t>> &VBTable : VBTables) {
+    StringRef VBTableName = VBTable.first;
+    uint32_t Idx = 0;
+    for (little32_t Offset : VBTable.second) {
+      outs() << VBTableName << '[' << Idx << "]: " << Offset << '\n';
+      Idx += sizeof(Offset);
+    }
+  }
+  for (const std::pair<StringRef, CompleteObjectLocator> &COLPair : COLs) {
+    StringRef COLName = COLPair.first;
+    const CompleteObjectLocator &COL = COLPair.second;
+    outs() << COLName << "[IsImageRelative]: " << COL.Data[0] << '\n';
+    outs() << COLName << "[OffsetToTop]: " << COL.Data[1] << '\n';
+    outs() << COLName << "[VFPtrOffset]: " << COL.Data[2] << '\n';
+    outs() << COLName << "[TypeDescriptor]: " << COL.Symbols[0] << '\n';
+    outs() << COLName << "[ClassHierarchyDescriptor]: " << COL.Symbols[1] << '\n';
+  }
+  for (const std::pair<StringRef, ClassHierarchyDescriptor> &CHDPair : CHDs) {
+    StringRef CHDName = CHDPair.first;
+    const ClassHierarchyDescriptor &CHD = CHDPair.second;
+    outs() << CHDName << "[AlwaysZero]: " << CHD.Data[0] << '\n';
+    outs() << CHDName << "[Flags]: " << CHD.Data[1] << '\n';
+    outs() << CHDName << "[NumClasses]: " << CHD.Data[2] << '\n';
+    outs() << CHDName << "[BaseClassArray]: " << CHD.Symbols[0] << '\n';
+  }
+  for (const std::pair<std::pair<StringRef, uint64_t>, StringRef> &BCAEntry :
+       BCAEntries) {
+    StringRef BCAName = BCAEntry.first.first;
+    uint64_t Offset = BCAEntry.first.second;
+    StringRef SymName = BCAEntry.second;
+    outs() << BCAName << '[' << Offset << "]: " << SymName << '\n';
+  }
+  for (const std::pair<StringRef, BaseClassDescriptor> &BCDPair : BCDs) {
+    StringRef BCDName = BCDPair.first;
+    const BaseClassDescriptor &BCD = BCDPair.second;
+    outs() << BCDName << "[TypeDescriptor]: " << BCD.Symbols[0] << '\n';
+    outs() << BCDName << "[NumBases]: " << BCD.Data[0] << '\n';
+    outs() << BCDName << "[OffsetInVBase]: " << BCD.Data[1] << '\n';
+    outs() << BCDName << "[VBPtrOffset]: " << BCD.Data[2] << '\n';
+    outs() << BCDName << "[OffsetInVBTable]: " << BCD.Data[3] << '\n';
+    outs() << BCDName << "[Flags]: " << BCD.Data[4] << '\n';
+    outs() << BCDName << "[ClassHierarchyDescriptor]: " << BCD.Symbols[1] << '\n';
+  }
+  for (const std::pair<StringRef, TypeDescriptor> &TDPair : TDs) {
+    StringRef TDName = TDPair.first;
+    const TypeDescriptor &TD = TDPair.second;
+    outs() << TDName << "[VFPtr]: " << TD.Symbols[0] << '\n';
+    outs() << TDName << "[AlwaysZero]: " << TD.AlwaysZero << '\n';
+    outs() << TDName << "[MangledName]: ";
+    outs().write_escaped(TD.MangledName.rtrim(StringRef("\0", 1)),
+                         /*UseHexEscapes=*/true)
+        << '\n';
+  }
+  for (const std::pair<std::pair<StringRef, uint64_t>, StringRef> &VTTPair :
+       VTTEntries) {
+    StringRef VTTName = VTTPair.first.first;
+    uint64_t VTTOffset = VTTPair.first.second;
+    StringRef VTTEntry = VTTPair.second;
+    outs() << VTTName << '[' << VTTOffset << "]: " << VTTEntry << '\n';
+  }
+  for (const std::pair<StringRef, StringRef> &TIPair : TINames) {
+    StringRef TIName = TIPair.first;
+    outs() << TIName << ": " << TIPair.second << '\n';
+  }
+  auto VTableSymI = VTableSymEntries.begin();
+  auto VTableSymE = VTableSymEntries.end();
+  auto VTableDataI = VTableDataEntries.begin();
+  auto VTableDataE = VTableDataEntries.end();
+  for (;;) {
+    bool SymDone = VTableSymI == VTableSymE;
+    bool DataDone = VTableDataI == VTableDataE;
+    if (SymDone && DataDone)
+      break;
+    if (!SymDone && (DataDone || VTableSymI->first < VTableDataI->first)) {
+      StringRef VTableName = VTableSymI->first.first;
+      uint64_t Offset = VTableSymI->first.second;
+      StringRef VTableEntry = VTableSymI->second;
+      outs() << VTableName << '[' << Offset << "]: ";
+      outs() << VTableEntry;
+      outs() << '\n';
+      ++VTableSymI;
+      continue;
+    }
+    if (!DataDone && (SymDone || VTableDataI->first < VTableSymI->first)) {
+      StringRef VTableName = VTableDataI->first.first;
+      uint64_t Offset = VTableDataI->first.second;
+      int64_t VTableEntry = VTableDataI->second;
+      outs() << VTableName << '[' << Offset << "]: ";
+      outs() << VTableEntry;
+      outs() << '\n';
+      ++VTableDataI;
+      continue;
+    }
+  }
+}
+
+static void dumpArchive(const Archive *Arc) {
+  for (const Archive::Child &ArcC : Arc->children()) {
+    ErrorOr<std::unique_ptr<Binary>> ChildOrErr = ArcC.getAsBinary();
+    if (std::error_code EC = ChildOrErr.getError()) {
+      // Ignore non-object files.
+      if (EC != object_error::invalid_file_type)
+        reportError(Arc->getFileName(), EC.message());
+      continue;
+    }
+
+    if (ObjectFile *Obj = dyn_cast<ObjectFile>(&*ChildOrErr.get()))
+      dumpVTables(Obj);
+    else
+      reportError(Arc->getFileName(),
+                  vtabledump_error::unrecognized_file_format);
+  }
+}
+
+static void dumpInput(StringRef File) {
+  // If file isn't stdin, check that it exists.
+  if (File != "-" && !sys::fs::exists(File)) {
+    reportError(File, vtabledump_error::file_not_found);
+    return;
+  }
+
+  // Attempt to open the binary.
+  ErrorOr<OwningBinary<Binary>> BinaryOrErr = createBinary(File);
+  if (std::error_code EC = BinaryOrErr.getError()) {
+    reportError(File, EC);
+    return;
+  }
+  Binary &Binary = *BinaryOrErr.get().getBinary();
+
+  if (Archive *Arc = dyn_cast<Archive>(&Binary))
+    dumpArchive(Arc);
+  else if (ObjectFile *Obj = dyn_cast<ObjectFile>(&Binary))
+    dumpVTables(Obj);
+  else
+    reportError(File, vtabledump_error::unrecognized_file_format);
+}
+
+int main(int argc, const char *argv[]) {
+  sys::PrintStackTraceOnErrorSignal();
+  PrettyStackTraceProgram X(argc, argv);
+  llvm_shutdown_obj Y;
+
+  // Initialize targets.
+  llvm::InitializeAllTargetInfos();
+
+  // Register the target printer for --version.
+  cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion);
+
+  cl::ParseCommandLineOptions(argc, argv, "LLVM VTable Dumper\n");
+
+  // Default to stdin if no filename is specified.
+  if (opts::InputFilenames.size() == 0)
+    opts::InputFilenames.push_back("-");
+
+  std::for_each(opts::InputFilenames.begin(), opts::InputFilenames.end(),
+                dumpInput);
+
+  return ReturnValue;
+}
diff --git a/tools/llvm-vtabledump/llvm-vtabledump.h b/tools/llvm-vtabledump/llvm-vtabledump.h
new file mode 100644
index 000000000000..62f755739c39
--- /dev/null
+++ b/tools/llvm-vtabledump/llvm-vtabledump.h
@@ -0,0 +1,23 @@
+//===-- llvm-vtabledump.h ---------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TOOLS_LLVM_VTABLEDUMP_LLVM_VTABLEDUMP_H
+#define LLVM_TOOLS_LLVM_VTABLEDUMP_LLVM_VTABLEDUMP_H
+
+#include "llvm/Support/CommandLine.h"
+#include <string>
+
+namespace opts {
+extern llvm::cl::list<std::string> InputFilenames;
+} // namespace opts
+
+#define LLVM_VTABLEDUMP_ENUM_ENT(ns, enum)                                     \
+  { #enum, ns::enum }
+
+#endif
diff --git a/tools/lto/CMakeLists.txt b/tools/lto/CMakeLists.txt
index 71391b7cf5f4..87f42e87cb41 100644
--- a/tools/lto/CMakeLists.txt
+++ b/tools/lto/CMakeLists.txt
@@ -7,8 +7,6 @@ set(LLVM_LINK_COMPONENTS
   Support
   )
 
-add_definitions( -DLLVM_VERSION_INFO=\"${PACKAGE_VERSION}\" )
-
 set(SOURCES
   LTODisassembler.cpp
   lto.cpp
diff --git a/tools/lto/Makefile b/tools/lto/Makefile
index a4fe9ac77c17..530c05a47318 100644
--- a/tools/lto/Makefile
+++ b/tools/lto/Makefile
@@ -17,10 +17,6 @@ EXPORTED_SYMBOL_FILE = $(PROJ_SRC_DIR)/lto.exports
 
 include $(LEVEL)/Makefile.common
 
-ifdef LLVM_VERSION_INFO
-CXX.Flags += -DLLVM_VERSION_INFO='"$(LLVM_VERSION_INFO)"'
-endif
-
 ifeq ($(HOST_OS),Darwin)
     # Special hack to allow libLTO to have an offset version number.
     ifdef LLVM_LTO_VERSION_OFFSET
diff --git a/tools/lto/lto.cpp b/tools/lto/lto.cpp
index 5732996a1606..ec0372ea5607 100644
--- a/tools/lto/lto.cpp
+++ b/tools/lto/lto.cpp
@@ -14,6 +14,7 @@
 
 #include "llvm-c/lto.h"
 #include "llvm/CodeGen/CommandFlags.h"
+#include "llvm/IR/LLVMContext.h"
 #include "llvm/LTO/LTOCodeGenerator.h"
 #include "llvm/LTO/LTOModule.h"
 #include "llvm/Support/MemoryBuffer.h"
@@ -32,6 +33,10 @@ static cl::opt<bool>
 DisableGVNLoadPRE("disable-gvn-loadpre", cl::init(false),
   cl::desc("Do not run the GVN load PRE pass"));
 
+static cl::opt<bool>
+DisableLTOVectorization("disable-lto-vectorization", cl::init(false),
+  cl::desc("Do not run loop or slp vectorization during LTO"));
+
 // Holds most recent error string.
 // *** Not thread safe ***
 static std::string sLastErrorString;
@@ -146,6 +151,24 @@ lto_module_t lto_module_create_from_memory_with_path(const void* mem,
       LTOModule::createFromBuffer(mem, length, Options, sLastErrorString, path));
 }
 
+lto_module_t lto_module_create_in_local_context(const void *mem, size_t length,
+                                                const char *path) {
+  lto_initialize();
+  llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
+  return wrap(LTOModule::createInLocalContext(mem, length, Options,
+                                              sLastErrorString, path));
+}
+
+lto_module_t lto_module_create_in_codegen_context(const void *mem,
+                                                  size_t length,
+                                                  const char *path,
+                                                  lto_code_gen_t cg) {
+  lto_initialize();
+  llvm::TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
+  return wrap(LTOModule::createInContext(mem, length, Options, sLastErrorString,
+                                         path, &unwrap(cg)->getContext()));
+}
+
 void lto_module_dispose(lto_module_t mod) { delete unwrap(mod); }
 
 const char* lto_module_get_target_triple(lto_module_t mod) {
@@ -191,21 +214,31 @@ void lto_codegen_set_diagnostic_handler(lto_code_gen_t cg,
   unwrap(cg)->setDiagnosticHandler(diag_handler, ctxt);
 }
 
-lto_code_gen_t lto_codegen_create(void) {
+static lto_code_gen_t createCodeGen(bool InLocalContext) {
   lto_initialize();
 
   TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
 
-  LTOCodeGenerator *CodeGen = new LTOCodeGenerator();
+  LTOCodeGenerator *CodeGen =
+      InLocalContext ? new LTOCodeGenerator(make_unique<LLVMContext>())
+                     : new LTOCodeGenerator();
   if (CodeGen)
     CodeGen->setTargetOptions(Options);
   return wrap(CodeGen);
 }
 
+lto_code_gen_t lto_codegen_create(void) {
+  return createCodeGen(/* InLocalContext */ false);
+}
+
+lto_code_gen_t lto_codegen_create_in_local_context(void) {
+  return createCodeGen(/* InLocalContext */ true);
+}
+
 void lto_codegen_dispose(lto_code_gen_t cg) { delete unwrap(cg); }
 
 bool lto_codegen_add_module(lto_code_gen_t cg, lto_module_t mod) {
-  return !unwrap(cg)->addModule(unwrap(mod), sLastErrorString);
+  return !unwrap(cg)->addModule(unwrap(mod));
 }
 
 bool lto_codegen_set_debug_model(lto_code_gen_t cg, lto_debug_model debug) {
@@ -252,7 +285,8 @@ const void *lto_codegen_compile(lto_code_gen_t cg, size_t *length) {
     parsedOptions = true;
   }
   return unwrap(cg)->compile(length, DisableOpt, DisableInline,
-                             DisableGVNLoadPRE, sLastErrorString);
+                             DisableGVNLoadPRE, DisableLTOVectorization,
+                             sLastErrorString);
 }
 
 bool lto_codegen_compile_to_file(lto_code_gen_t cg, const char **name) {
@@ -261,8 +295,9 @@ bool lto_codegen_compile_to_file(lto_code_gen_t cg, const char **name) {
     lto_add_attrs(cg);
     parsedOptions = true;
   }
-  return !unwrap(cg)->compile_to_file(name, DisableOpt, DisableInline,
-                                      DisableGVNLoadPRE, sLastErrorString);
+  return !unwrap(cg)->compile_to_file(
+      name, DisableOpt, DisableInline, DisableGVNLoadPRE,
+      DisableLTOVectorization, sLastErrorString);
 }
 
 void lto_codegen_debug_options(lto_code_gen_t cg, const char *opt) {
diff --git a/tools/lto/lto.exports b/tools/lto/lto.exports
index b10ab1a3e6c0..f6ceaac74d18 100644
--- a/tools/lto/lto.exports
+++ b/tools/lto/lto.exports
@@ -6,6 +6,8 @@ lto_module_create_from_fd
 lto_module_create_from_fd_at_offset
 lto_module_create_from_memory
 lto_module_create_from_memory_with_path
+lto_module_create_in_local_context
+lto_module_create_in_codegen_context
 lto_module_get_deplib
 lto_module_get_linkeropt
 lto_module_get_num_deplibs
@@ -25,6 +27,7 @@ lto_codegen_add_module
 lto_codegen_add_must_preserve_symbol
 lto_codegen_compile
 lto_codegen_create
+lto_codegen_create_in_local_context
 lto_codegen_dispose
 lto_codegen_set_debug_model
 lto_codegen_set_pic_model
diff --git a/tools/macho-dump/macho-dump.cpp b/tools/macho-dump/macho-dump.cpp
index 760097974dbd..604f93adfbbf 100644
--- a/tools/macho-dump/macho-dump.cpp
+++ b/tools/macho-dump/macho-dump.cpp
@@ -300,12 +300,12 @@ DumpDataInCodeDataCommand(const MachOObjectFile &Obj,
 static int
 DumpLinkerOptionsCommand(const MachOObjectFile &Obj,
                          const MachOObjectFile::LoadCommandInfo &LCI) {
-  MachO::linker_options_command LOLC = Obj.getLinkerOptionsLoadCommand(LCI);
+  MachO::linker_option_command LOLC = Obj.getLinkerOptionLoadCommand(LCI);
   outs() << "  ('count', " << LOLC.count << ")\n"
          << "  ('_strings', [\n";
 
-  uint64_t DataSize = LOLC.cmdsize - sizeof(MachO::linker_options_command);
-  const char *P = LCI.Ptr + sizeof(MachO::linker_options_command);
+  uint64_t DataSize = LOLC.cmdsize - sizeof(MachO::linker_option_command);
+  const char *P = LCI.Ptr + sizeof(MachO::linker_option_command);
   StringRef Data(P, DataSize);
   for (unsigned i = 0; i != LOLC.count; ++i) {
     std::pair<StringRef,StringRef> Split = Data.split('\0');
@@ -324,7 +324,7 @@ DumpVersionMin(const MachOObjectFile &Obj,
                const MachOObjectFile::LoadCommandInfo &LCI) {
   MachO::version_min_command VMLC = Obj.getVersionMinLoadCommand(LCI);
   outs() << "  ('version, " << VMLC.version << ")\n"
-         << "  ('reserved, " << VMLC.reserved << ")\n";
+         << "  ('sdk, " << VMLC.sdk << ")\n";
   return 0;
 }
 
@@ -356,7 +356,7 @@ static int DumpLoadCommand(const MachOObjectFile &Obj,
     return DumpLinkeditDataCommand(Obj, LCI);
   case MachO::LC_DATA_IN_CODE:
     return DumpDataInCodeDataCommand(Obj, LCI);
-  case MachO::LC_LINKER_OPTIONS:
+  case MachO::LC_LINKER_OPTION:
     return DumpLinkerOptionsCommand(Obj, LCI);
   case MachO::LC_VERSION_MIN_IPHONEOS:
   case MachO::LC_VERSION_MIN_MACOSX:
@@ -403,12 +403,12 @@ int main(int argc, char **argv) {
 
   cl::ParseCommandLineOptions(argc, argv, "llvm Mach-O dumping tool\n");
 
-  ErrorOr<Binary *> BinaryOrErr = createBinary(InputFile);
+  ErrorOr<OwningBinary<Binary>> BinaryOrErr = createBinary(InputFile);
   if (std::error_code EC = BinaryOrErr.getError())
     return Error("unable to read input: '" + EC.message() + "'");
-  std::unique_ptr<Binary> Binary(BinaryOrErr.get());
+  Binary &Binary = *BinaryOrErr.get().getBinary();
 
-  const MachOObjectFile *InputObject = dyn_cast<MachOObjectFile>(Binary.get());
+  const MachOObjectFile *InputObject = dyn_cast<MachOObjectFile>(&Binary);
   if (!InputObject)
     return Error("Not a MachO object");
 
diff --git a/tools/msbuild/CMakeLists.txt b/tools/msbuild/CMakeLists.txt
index b7be71d2a880..4f471e5408ba 100644
--- a/tools/msbuild/CMakeLists.txt
+++ b/tools/msbuild/CMakeLists.txt
@@ -10,6 +10,8 @@ if (WIN32)
     set(prop_file_v110_xp "Microsoft.Cpp.${platform}.LLVM-vs2012_xp.props")
     set(prop_file_v120 "toolset-vs2013.props")
     set(prop_file_v120_xp "toolset-vs2013_xp.props")
+    set(prop_file_v140 "toolset-vs2014.props")
+    set(prop_file_v140_xp "toolset-vs2014_xp.props")
 
     if (platform STREQUAL "Win32")
       set(mflag "m32")
@@ -29,6 +31,11 @@ if (WIN32)
     configure_file(${prop_file_in} ${platform}/${prop_file_v120})
     set(VS_VERSION "v120_xp")
     configure_file(${prop_file_in} ${platform}/${prop_file_v120_xp})
+    set(VS_VERSION "v140")
+    set(MSC_VERSION "1900")
+    configure_file(${prop_file_in} ${platform}/${prop_file_v140})
+    set(VS_VERSION "v140_xp")
+    configure_file(${prop_file_in} ${platform}/${prop_file_v140_xp})
     set(VS_VERSION)
     set(MSC_VERSION)
     set(mflag)
@@ -38,12 +45,16 @@ if (WIN32)
     install(FILES "${CMAKE_CURRENT_BINARY_DIR}/${platform}/${prop_file_v110_xp}" DESTINATION tools/msbuild/${platform})
     install(FILES "${CMAKE_CURRENT_BINARY_DIR}/${platform}/${prop_file_v120}" DESTINATION tools/msbuild/${platform})
     install(FILES "${CMAKE_CURRENT_BINARY_DIR}/${platform}/${prop_file_v120_xp}" DESTINATION tools/msbuild/${platform})
+    install(FILES "${CMAKE_CURRENT_BINARY_DIR}/${platform}/${prop_file_v140}" DESTINATION tools/msbuild/${platform})
+    install(FILES "${CMAKE_CURRENT_BINARY_DIR}/${platform}/${prop_file_v140_xp}" DESTINATION tools/msbuild/${platform})
 
     install(FILES "Microsoft.Cpp.Win32.LLVM-vs2010.targets" DESTINATION "tools/msbuild/${platform}" RENAME "Microsoft.Cpp.${platform}.LLVM-vs2010.targets")
     install(FILES "Microsoft.Cpp.Win32.LLVM-vs2012.targets" DESTINATION "tools/msbuild/${platform}" RENAME "Microsoft.Cpp.${platform}.LLVM-vs2012.targets")
     install(FILES "Microsoft.Cpp.Win32.LLVM-vs2012_xp.targets" DESTINATION "tools/msbuild/${platform}" RENAME "Microsoft.Cpp.${platform}.LLVM-vs2012_xp.targets")
     install(FILES "toolset-vs2013.targets" DESTINATION "tools/msbuild/${platform}")
     install(FILES "toolset-vs2013_xp.targets" DESTINATION "tools/msbuild/${platform}")
+    install(FILES "toolset-vs2014.targets" DESTINATION "tools/msbuild/${platform}")
+    install(FILES "toolset-vs2014_xp.targets" DESTINATION "tools/msbuild/${platform}")
   endforeach()
 
   set(LIB_PATH_VERSION)
diff --git a/tools/msbuild/install.bat b/tools/msbuild/install.bat
index 9880fb27e9b2..6e321e3f5801 100644
--- a/tools/msbuild/install.bat
+++ b/tools/msbuild/install.bat
@@ -6,13 +6,15 @@ set SUCCESS=0
 REM Change to the directory of this batch file.

 cd /d %~dp0

 

+REM Loop over the two platforms in awkward batch file fashion.

 set PLATFORM=None

-:START

-IF %PLATFORM% == x64 GOTO LOOPEND

+:PLATFORMLOOPHEAD

+IF %PLATFORM% == x64 GOTO PLATFORMLOOPEND

 IF %PLATFORM% == Win32 SET PLATFORM=x64

 IF %PLATFORM% == None SET PLATFORM=Win32

 

 REM Search for the MSBuild toolsets directory.

+

 SET D="%ProgramFiles%\MSBuild\Microsoft.Cpp\v4.0\Platforms\%PLATFORM%\PlatformToolsets"

 IF EXIST %D% GOTO FOUND_V100

 SET D="%ProgramFiles(x86)%\MSBuild\Microsoft.Cpp\v4.0\Platforms\%PLATFORM%\PlatformToolsets"

@@ -30,13 +32,24 @@ IF EXIST %D% GOTO FOUND_V120
 SET D="%ProgramFiles(x86)%\MSBuild\Microsoft.Cpp\v4.0\V120\Platforms\%PLATFORM%\PlatformToolsets"

 IF EXIST %D% GOTO FOUND_V120

 

-:LOOPEND

+:TRY_V140

+SET D="%ProgramFiles%\MSBuild\Microsoft.Cpp\v4.0\V140\Platforms\%PLATFORM%\PlatformToolsets"

+IF EXIST %D% GOTO FOUND_V140

+SET D="%ProgramFiles(x86)%\MSBuild\Microsoft.Cpp\v4.0\V140\Platforms\%PLATFORM%\PlatformToolsets"

+IF EXIST %D% GOTO FOUND_V140

+

+:TRY_V150

+

+GOTO PLATFORMLOOPHEAD

+

+:PLATFORMLOOPEND

 IF %SUCCESS% == 1 goto DONE

 echo Failed to find MSBuild toolsets directory.

 goto FAILED

 

 

 :FOUND_V100

+REM Routine for installing v100 toolchain.

 IF NOT EXIST %D%\LLVM-vs2010 mkdir %D%\LLVM-vs2010

 IF NOT %ERRORLEVEL% == 0 GOTO FAILED

 copy %PLATFORM%\Microsoft.Cpp.%PLATFORM%.LLVM-vs2010.props %D%\LLVM-vs2010

@@ -47,6 +60,7 @@ set SUCCESS=1
 GOTO TRY_V110

 

 :FOUND_V110

+REM Routine for installing v110 toolchain.

 IF NOT EXIST %D%\LLVM-vs2012 mkdir %D%\LLVM-vs2012

 IF NOT %ERRORLEVEL% == 0 GOTO FAILED

 copy %PLATFORM%\Microsoft.Cpp.%PLATFORM%.LLVM-vs2012.props %D%\LLVM-vs2012

@@ -63,6 +77,7 @@ set SUCCESS=1
 GOTO TRY_V120

 

 :FOUND_V120

+REM Routine for installing v120 toolchain.

 IF NOT EXIST %D%\LLVM-vs2013 mkdir %D%\LLVM-vs2013

 IF NOT %ERRORLEVEL% == 0 GOTO FAILED

 copy %PLATFORM%\toolset-vs2013.props %D%\LLVM-vs2013\toolset.props

@@ -76,7 +91,24 @@ IF NOT %ERRORLEVEL% == 0 GOTO FAILED
 copy %PLATFORM%\toolset-vs2013_xp.targets %D%\LLVM-vs2013_xp\toolset.targets

 IF NOT %ERRORLEVEL% == 0 GOTO FAILED

 set SUCCESS=1

-GOTO START

+GOTO TRY_V140

+

+:FOUND_V140

+REM Routine for installing v140 toolchain.

+IF NOT EXIST %D%\LLVM-vs2014 mkdir %D%\LLVM-vs2014

+IF NOT %ERRORLEVEL% == 0 GOTO FAILED

+copy %PLATFORM%\toolset-vs2014.props %D%\LLVM-vs2014\toolset.props

+IF NOT %ERRORLEVEL% == 0 GOTO FAILED

+copy %PLATFORM%\toolset-vs2014.targets %D%\LLVM-vs2014\toolset.targets

+IF NOT %ERRORLEVEL% == 0 GOTO FAILED

+IF NOT EXIST %D%\LLVM-vs2014_xp mkdir %D%\LLVM-vs2014_xp

+IF NOT %ERRORLEVEL% == 0 GOTO FAILED

+copy %PLATFORM%\toolset-vs2014_xp.props %D%\LLVM-vs2014_xp\toolset.props

+IF NOT %ERRORLEVEL% == 0 GOTO FAILED

+copy %PLATFORM%\toolset-vs2014_xp.targets %D%\LLVM-vs2014_xp\toolset.targets

+IF NOT %ERRORLEVEL% == 0 GOTO FAILED

+set SUCCESS=1

+GOTO TRY_V150

 

 

 :DONE

diff --git a/tools/msbuild/toolset-vs2014.targets b/tools/msbuild/toolset-vs2014.targets
new file mode 100644
index 000000000000..05b59a2d84f0
--- /dev/null
+++ b/tools/msbuild/toolset-vs2014.targets
@@ -0,0 +1,3 @@
+<Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">

+  <Import Project="$(VCTargetsPath)\Microsoft.CppCommon.targets" />

+</Project>

diff --git a/tools/msbuild/toolset-vs2014_xp.targets b/tools/msbuild/toolset-vs2014_xp.targets
new file mode 100644
index 000000000000..eec4f18daa4f
--- /dev/null
+++ b/tools/msbuild/toolset-vs2014_xp.targets
@@ -0,0 +1,21 @@
+<Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">

+  <!-- Force TargetFrameworkVersion to v4.0 to support XP-->

+  <PropertyGroup>

+    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>

+    <BeforeClCompileTargets>NoSupportCodeAnalysisXP;$(BeforeClCompileTargets)</BeforeClCompileTargets>

+  </PropertyGroup>

+

+  <Import Project="$(VCTargetsPath)\Microsoft.CppCommon.targets" />

+

+  <Target Name="NoSupportCodeAnalysisXP" Condition="'$(ErrorNoSupportCodeAnalysisXP)' != 'false'">

+    <VCMessage Condition="'$(DesignTimeBuild)' != 'true' and '@(ClCompile->AnyHaveMetadataValue('EnablePREfast', 'true'))'=='true'" Code="MSB8026" Type="Error"/>

+  </Target>

+

+  <PropertyGroup>

+    <PrepareForBuildDependsOn>CheckWindowsSDK71A;$(PrepareForBuildDependsOn)</PrepareForBuildDependsOn>

+  </PropertyGroup>

+

+  <Target Name="CheckWindowsSDK71A">

+    <VCMessage Code="MSB8003" Type="Warning" Arguments="WindowsSdkDir_71A" Condition="'$(WindowsSdkDir_71A)'=='' and '$(UseEnv)' != 'true'" />

+  </Target>

+</Project>

diff --git a/tools/msbuild/uninstall.bat b/tools/msbuild/uninstall.bat
index b0bc943daf1f..c1afae2c3c96 100644
--- a/tools/msbuild/uninstall.bat
+++ b/tools/msbuild/uninstall.bat
@@ -6,8 +6,8 @@ REM CD to the directory of this batch file.
 cd /d %~dp0

 

 set PLATFORM=None

-:START

-IF %PLATFORM% == x64 GOTO END

+:LOOPHEAD

+IF %PLATFORM% == x64 GOTO LOOPEND

 IF %PLATFORM% == Win32 SET PLATFORM=x64

 IF %PLATFORM% == None SET PLATFORM=Win32

 

@@ -51,8 +51,23 @@ IF EXIST %D%\LLVM-vs2013_xp del %D%\LLVM-vs2013_xp\toolset.props
 IF EXIST %D%\LLVM-vs2013_xp del %D%\LLVM-vs2013_xp\toolset.targets

 IF EXIST %D%\LLVM-vs2013_xp rmdir %D%\LLVM-vs2013_xp

 

+SET D="%ProgramFiles%\MSBuild\Microsoft.Cpp\v4.0\V140\Platforms\%PLATFORM%\PlatformToolsets"

+IF EXIST %D%\LLVM-vs2014 del %D%\LLVM-vs2014\toolset.props

+IF EXIST %D%\LLVM-vs2014 del %D%\LLVM-vs2014\toolset.targets

+IF EXIST %D%\LLVM-vs2014 rmdir %D%\LLVM-vs2014

+IF EXIST %D%\LLVM-vs2014_xp del %D%\LLVM-vs2014_xp\toolset.props

+IF EXIST %D%\LLVM-vs2014_xp del %D%\LLVM-vs2014_xp\toolset.targets

+IF EXIST %D%\LLVM-vs2014_xp rmdir %D%\LLVM-vs2014_xp

+SET D="%ProgramFiles(x86)%\MSBuild\Microsoft.Cpp\v4.0\V140\Platforms\%PLATFORM%\PlatformToolsets"

+IF EXIST %D%\LLVM-vs2014 del %D%\LLVM-vs2014\toolset.props

+IF EXIST %D%\LLVM-vs2014 del %D%\LLVM-vs2014\toolset.targets

+IF EXIST %D%\LLVM-vs2014 rmdir %D%\LLVM-vs2014

+IF EXIST %D%\LLVM-vs2014_xp del %D%\LLVM-vs2014_xp\toolset.props

+IF EXIST %D%\LLVM-vs2014_xp del %D%\LLVM-vs2014_xp\toolset.targets

+IF EXIST %D%\LLVM-vs2014_xp rmdir %D%\LLVM-vs2014_xp

 

-GOTO START

 

-:END

+GOTO LOOPHEAD

+

+:LOOPEND

 echo Done!

diff --git a/tools/obj2yaml/CMakeLists.txt b/tools/obj2yaml/CMakeLists.txt
index f167ed5f6e87..3cdac5c74875 100644
--- a/tools/obj2yaml/CMakeLists.txt
+++ b/tools/obj2yaml/CMakeLists.txt
@@ -3,6 +3,6 @@ set(LLVM_LINK_COMPONENTS
   Support
   )
 
-add_llvm_utility(obj2yaml
+add_llvm_tool(obj2yaml
   obj2yaml.cpp coff2yaml.cpp elf2yaml.cpp Error.cpp
   )
diff --git a/tools/obj2yaml/Error.cpp b/tools/obj2yaml/Error.cpp
index 00741287a649..abef8af58cbf 100644
--- a/tools/obj2yaml/Error.cpp
+++ b/tools/obj2yaml/Error.cpp
@@ -20,7 +20,9 @@ public:
 };
 } // namespace
 
-const char *_obj2yaml_error_category::name() const { return "obj2yaml"; }
+const char *_obj2yaml_error_category::name() const LLVM_NOEXCEPT {
+  return "obj2yaml";
+}
 
 std::string _obj2yaml_error_category::message(int ev) const {
   switch (static_cast<obj2yaml_error>(ev)) {
diff --git a/tools/obj2yaml/Error.h b/tools/obj2yaml/Error.h
index 4657f0db5282..982f59e236cc 100644
--- a/tools/obj2yaml/Error.h
+++ b/tools/obj2yaml/Error.h
@@ -7,8 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_TOOLS_ERROR_H
-#define LLVM_TOOLS_ERROR_H
+#ifndef LLVM_TOOLS_OBJ2YAML_ERROR_H
+#define LLVM_TOOLS_OBJ2YAML_ERROR_H
 
 #include <system_error>
 
diff --git a/tools/obj2yaml/Makefile b/tools/obj2yaml/Makefile
index 95f393ddd6f4..6cbef6998dc6 100644
--- a/tools/obj2yaml/Makefile
+++ b/tools/obj2yaml/Makefile
@@ -14,7 +14,4 @@ LINK_COMPONENTS := object
 # This tool has no plugins, optimize startup time.
 TOOL_NO_EXPORTS = 1
 
-# Don't install this utility
-NO_INSTALL = 1
-
 include $(LEVEL)/Makefile.common
diff --git a/tools/obj2yaml/coff2yaml.cpp b/tools/obj2yaml/coff2yaml.cpp
index fed4533a982c..5baa644557cd 100644
--- a/tools/obj2yaml/coff2yaml.cpp
+++ b/tools/obj2yaml/coff2yaml.cpp
@@ -20,7 +20,9 @@ namespace {
 class COFFDumper {
   const object::COFFObjectFile &Obj;
   COFFYAML::Object YAMLObj;
-  void dumpHeader(const object::coff_file_header *Header);
+  template <typename T>
+  void dumpOptionalHeader(T OptionalHeader);
+  void dumpHeader();
   void dumpSections(unsigned numSections);
   void dumpSymbols(unsigned numSymbols);
 
@@ -31,40 +33,90 @@ public:
 
 }
 
-static void check(std::error_code ec) {
-  if (ec)
-    report_fatal_error(ec.message());
+COFFDumper::COFFDumper(const object::COFFObjectFile &Obj) : Obj(Obj) {
+  const object::pe32_header *PE32Header = nullptr;
+  Obj.getPE32Header(PE32Header);
+  if (PE32Header) {
+    dumpOptionalHeader(PE32Header);
+  } else {
+    const object::pe32plus_header *PE32PlusHeader = nullptr;
+    Obj.getPE32PlusHeader(PE32PlusHeader);
+    if (PE32PlusHeader) {
+      dumpOptionalHeader(PE32PlusHeader);
+    }
+  }
+  dumpHeader();
+  dumpSections(Obj.getNumberOfSections());
+  dumpSymbols(Obj.getNumberOfSymbols());
 }
 
-COFFDumper::COFFDumper(const object::COFFObjectFile &Obj) : Obj(Obj) {
-  const object::coff_file_header *Header;
-  check(Obj.getCOFFHeader(Header));
-  dumpHeader(Header);
-  dumpSections(Header->NumberOfSections);
-  dumpSymbols(Header->NumberOfSymbols);
+template <typename T> void COFFDumper::dumpOptionalHeader(T OptionalHeader) {
+  YAMLObj.OptionalHeader = COFFYAML::PEHeader();
+  YAMLObj.OptionalHeader->Header.AddressOfEntryPoint =
+      OptionalHeader->AddressOfEntryPoint;
+  YAMLObj.OptionalHeader->Header.AddressOfEntryPoint =
+      OptionalHeader->AddressOfEntryPoint;
+  YAMLObj.OptionalHeader->Header.ImageBase = OptionalHeader->ImageBase;
+  YAMLObj.OptionalHeader->Header.SectionAlignment =
+      OptionalHeader->SectionAlignment;
+  YAMLObj.OptionalHeader->Header.FileAlignment = OptionalHeader->FileAlignment;
+  YAMLObj.OptionalHeader->Header.MajorOperatingSystemVersion =
+      OptionalHeader->MajorOperatingSystemVersion;
+  YAMLObj.OptionalHeader->Header.MinorOperatingSystemVersion =
+      OptionalHeader->MinorOperatingSystemVersion;
+  YAMLObj.OptionalHeader->Header.MajorImageVersion =
+      OptionalHeader->MajorImageVersion;
+  YAMLObj.OptionalHeader->Header.MinorImageVersion =
+      OptionalHeader->MinorImageVersion;
+  YAMLObj.OptionalHeader->Header.MajorSubsystemVersion =
+      OptionalHeader->MajorSubsystemVersion;
+  YAMLObj.OptionalHeader->Header.MinorSubsystemVersion =
+      OptionalHeader->MinorSubsystemVersion;
+  YAMLObj.OptionalHeader->Header.Subsystem = OptionalHeader->Subsystem;
+  YAMLObj.OptionalHeader->Header.DLLCharacteristics =
+      OptionalHeader->DLLCharacteristics;
+  YAMLObj.OptionalHeader->Header.SizeOfStackReserve =
+      OptionalHeader->SizeOfStackReserve;
+  YAMLObj.OptionalHeader->Header.SizeOfStackCommit =
+      OptionalHeader->SizeOfStackCommit;
+  YAMLObj.OptionalHeader->Header.SizeOfHeapReserve =
+      OptionalHeader->SizeOfHeapReserve;
+  YAMLObj.OptionalHeader->Header.SizeOfHeapCommit =
+      OptionalHeader->SizeOfHeapCommit;
+  unsigned I = 0;
+  for (auto &DestDD : YAMLObj.OptionalHeader->DataDirectories) {
+    const object::data_directory *DD;
+    if (Obj.getDataDirectory(I++, DD))
+      continue;
+    DestDD = COFF::DataDirectory();
+    DestDD->RelativeVirtualAddress = DD->RelativeVirtualAddress;
+    DestDD->Size = DD->Size;
+  }
 }
 
-void COFFDumper::dumpHeader(const object::coff_file_header *Header) {
-  YAMLObj.Header.Machine = Header->Machine;
-  YAMLObj.Header.Characteristics = Header->Characteristics;
+void COFFDumper::dumpHeader() {
+  YAMLObj.Header.Machine = Obj.getMachine();
+  YAMLObj.Header.Characteristics = Obj.getCharacteristics();
 }
 
 void COFFDumper::dumpSections(unsigned NumSections) {
-  std::vector<COFFYAML::Section> &Sections = YAMLObj.Sections;
-  for (const auto &Section : Obj.sections()) {
-    const object::coff_section *Sect = Obj.getCOFFSection(Section);
-    COFFYAML::Section Sec;
-    Sec.Name = Sect->Name; // FIXME: check the null termination!
-    uint32_t Characteristics = Sect->Characteristics;
-    Sec.Header.Characteristics = Characteristics;
-    Sec.Alignment = 1 << (((Characteristics >> 20) & 0xf) - 1);
+  std::vector<COFFYAML::Section> &YAMLSections = YAMLObj.Sections;
+  for (const auto &ObjSection : Obj.sections()) {
+    const object::coff_section *COFFSection = Obj.getCOFFSection(ObjSection);
+    COFFYAML::Section NewYAMLSection;
+    ObjSection.getName(NewYAMLSection.Name);
+    NewYAMLSection.Header.Characteristics = COFFSection->Characteristics;
+    NewYAMLSection.Header.VirtualAddress = ObjSection.getAddress();
+    NewYAMLSection.Header.VirtualSize = COFFSection->VirtualSize;
+    NewYAMLSection.Alignment = ObjSection.getAlignment();
 
     ArrayRef<uint8_t> sectionData;
-    Obj.getSectionContents(Sect, sectionData);
-    Sec.SectionData = yaml::BinaryRef(sectionData);
+    if (!ObjSection.isBSS())
+      Obj.getSectionContents(COFFSection, sectionData);
+    NewYAMLSection.SectionData = yaml::BinaryRef(sectionData);
 
     std::vector<COFFYAML::Relocation> Relocations;
-    for (const auto &Reloc : Section.relocations()) {
+    for (const auto &Reloc : ObjSection.relocations()) {
       const object::coff_relocation *reloc = Obj.getCOFFRelocation(Reloc);
       COFFYAML::Relocation Rel;
       object::symbol_iterator Sym = Reloc.getSymbol();
@@ -73,8 +125,8 @@ void COFFDumper::dumpSections(unsigned NumSections) {
       Rel.Type = reloc->Type;
       Relocations.push_back(Rel);
     }
-    Sec.Relocations = Relocations;
-    Sections.push_back(Sec);
+    NewYAMLSection.Relocations = Relocations;
+    YAMLSections.push_back(NewYAMLSection);
   }
 }
 
@@ -111,13 +163,15 @@ static void dumpWeakExternal(COFFYAML::Symbol *Sym,
 
 static void
 dumpSectionDefinition(COFFYAML::Symbol *Sym,
-                      const object::coff_aux_section_definition *ObjSD) {
+                      const object::coff_aux_section_definition *ObjSD,
+                      bool IsBigObj) {
   COFF::AuxiliarySectionDefinition YAMLASD;
+  int32_t AuxNumber = ObjSD->getNumber(IsBigObj);
   YAMLASD.Length = ObjSD->Length;
   YAMLASD.NumberOfRelocations = ObjSD->NumberOfRelocations;
   YAMLASD.NumberOfLinenumbers = ObjSD->NumberOfLinenumbers;
   YAMLASD.CheckSum = ObjSD->CheckSum;
-  YAMLASD.Number = ObjSD->Number;
+  YAMLASD.Number = AuxNumber;
   YAMLASD.Selection = ObjSD->Selection;
 
   Sym->SectionDefinition = YAMLASD;
@@ -136,63 +190,64 @@ dumpCLRTokenDefinition(COFFYAML::Symbol *Sym,
 void COFFDumper::dumpSymbols(unsigned NumSymbols) {
   std::vector<COFFYAML::Symbol> &Symbols = YAMLObj.Symbols;
   for (const auto &S : Obj.symbols()) {
-    const object::coff_symbol *Symbol = Obj.getCOFFSymbol(S);
+    object::COFFSymbolRef Symbol = Obj.getCOFFSymbol(S);
     COFFYAML::Symbol Sym;
     Obj.getSymbolName(Symbol, Sym.Name);
-    Sym.SimpleType = COFF::SymbolBaseType(Symbol->getBaseType());
-    Sym.ComplexType = COFF::SymbolComplexType(Symbol->getComplexType());
-    Sym.Header.StorageClass = Symbol->StorageClass;
-    Sym.Header.Value = Symbol->Value;
-    Sym.Header.SectionNumber = Symbol->SectionNumber;
-    Sym.Header.NumberOfAuxSymbols = Symbol->NumberOfAuxSymbols;
-
-    if (Symbol->NumberOfAuxSymbols > 0) {
+    Sym.SimpleType = COFF::SymbolBaseType(Symbol.getBaseType());
+    Sym.ComplexType = COFF::SymbolComplexType(Symbol.getComplexType());
+    Sym.Header.StorageClass = Symbol.getStorageClass();
+    Sym.Header.Value = Symbol.getValue();
+    Sym.Header.SectionNumber = Symbol.getSectionNumber();
+    Sym.Header.NumberOfAuxSymbols = Symbol.getNumberOfAuxSymbols();
+
+    if (Symbol.getNumberOfAuxSymbols() > 0) {
       ArrayRef<uint8_t> AuxData = Obj.getSymbolAuxData(Symbol);
-      if (Symbol->isFunctionDefinition()) {
+      if (Symbol.isFunctionDefinition()) {
         // This symbol represents a function definition.
-        assert(Symbol->NumberOfAuxSymbols == 1 &&
+        assert(Symbol.getNumberOfAuxSymbols() == 1 &&
                "Expected a single aux symbol to describe this function!");
 
         const object::coff_aux_function_definition *ObjFD =
             reinterpret_cast<const object::coff_aux_function_definition *>(
                 AuxData.data());
         dumpFunctionDefinition(&Sym, ObjFD);
-      } else if (Symbol->isFunctionLineInfo()) {
+      } else if (Symbol.isFunctionLineInfo()) {
         // This symbol describes function line number information.
-        assert(Symbol->NumberOfAuxSymbols == 1 &&
-               "Exepected a single aux symbol to describe this section!");
+        assert(Symbol.getNumberOfAuxSymbols() == 1 &&
+               "Expected a single aux symbol to describe this function!");
 
         const object::coff_aux_bf_and_ef_symbol *ObjBES =
             reinterpret_cast<const object::coff_aux_bf_and_ef_symbol *>(
                 AuxData.data());
         dumpbfAndEfLineInfo(&Sym, ObjBES);
-      } else if (Symbol->isWeakExternal()) {
+      } else if (Symbol.isAnyUndefined()) {
         // This symbol represents a weak external definition.
-        assert(Symbol->NumberOfAuxSymbols == 1 &&
-               "Exepected a single aux symbol to describe this section!");
+        assert(Symbol.getNumberOfAuxSymbols() == 1 &&
+               "Expected a single aux symbol to describe this weak symbol!");
 
         const object::coff_aux_weak_external *ObjWE =
             reinterpret_cast<const object::coff_aux_weak_external *>(
                 AuxData.data());
         dumpWeakExternal(&Sym, ObjWE);
-      } else if (Symbol->isFileRecord()) {
+      } else if (Symbol.isFileRecord()) {
         // This symbol represents a file record.
         Sym.File = StringRef(reinterpret_cast<const char *>(AuxData.data()),
-                             Symbol->NumberOfAuxSymbols * COFF::SymbolSize)
+                             Symbol.getNumberOfAuxSymbols() *
+                                 Obj.getSymbolTableEntrySize())
                        .rtrim(StringRef("\0", /*length=*/1));
-      } else if (Symbol->isSectionDefinition()) {
+      } else if (Symbol.isSectionDefinition()) {
         // This symbol represents a section definition.
-        assert(Symbol->NumberOfAuxSymbols == 1 &&
+        assert(Symbol.getNumberOfAuxSymbols() == 1 &&
                "Expected a single aux symbol to describe this section!");
 
         const object::coff_aux_section_definition *ObjSD =
             reinterpret_cast<const object::coff_aux_section_definition *>(
                 AuxData.data());
-        dumpSectionDefinition(&Sym, ObjSD);
-      } else if (Symbol->isCLRToken()) {
+        dumpSectionDefinition(&Sym, ObjSD, Symbol.isBigObj());
+      } else if (Symbol.isCLRToken()) {
         // This symbol represents a CLR token definition.
-        assert(Symbol->NumberOfAuxSymbols == 1 &&
-               "Expected a single aux symbol to describe this CLR Token");
+        assert(Symbol.getNumberOfAuxSymbols() == 1 &&
+               "Expected a single aux symbol to describe this CLR Token!");
 
         const object::coff_aux_clr_token *ObjCLRToken =
             reinterpret_cast<const object::coff_aux_clr_token *>(
diff --git a/tools/obj2yaml/elf2yaml.cpp b/tools/obj2yaml/elf2yaml.cpp
index 8b53ee770a62..d770ce1151ea 100644
--- a/tools/obj2yaml/elf2yaml.cpp
+++ b/tools/obj2yaml/elf2yaml.cpp
@@ -133,7 +133,7 @@ std::error_code ELFDumper<ELFT>::dumpSymbol(Elf_Sym_Iter Sym,
   S.Type = Sym->getType();
   S.Value = Sym->st_value;
   S.Size = Sym->st_size;
-  S.Visibility = Sym->st_other & 0x3;
+  S.Other = Sym->st_other;
 
   ErrorOr<StringRef> NameOrErr = Obj.getSymbolName(Sym);
   if (std::error_code EC = NameOrErr.getError())
diff --git a/tools/obj2yaml/obj2yaml.cpp b/tools/obj2yaml/obj2yaml.cpp
index 944314a923f7..b64096d75fa4 100644
--- a/tools/obj2yaml/obj2yaml.cpp
+++ b/tools/obj2yaml/obj2yaml.cpp
@@ -32,13 +32,13 @@ static std::error_code dumpInput(StringRef File) {
   if (File != "-" && !sys::fs::exists(File))
     return obj2yaml_error::file_not_found;
 
-  ErrorOr<Binary *> BinaryOrErr = createBinary(File);
+  ErrorOr<OwningBinary<Binary>> BinaryOrErr = createBinary(File);
   if (std::error_code EC = BinaryOrErr.getError())
     return EC;
 
-  std::unique_ptr<Binary> Binary(BinaryOrErr.get());
+  Binary &Binary = *BinaryOrErr.get().getBinary();
   // TODO: If this is an archive, then burst it and dump each entry
-  if (ObjectFile *Obj = dyn_cast<ObjectFile>(Binary.get()))
+  if (ObjectFile *Obj = dyn_cast<ObjectFile>(&Binary))
     return dumpObject(*Obj);
 
   return obj2yaml_error::unrecognized_file_format;
diff --git a/tools/obj2yaml/obj2yaml.h b/tools/obj2yaml/obj2yaml.h
index 6d81110f7a38..643ab7bc434d 100644
--- a/tools/obj2yaml/obj2yaml.h
+++ b/tools/obj2yaml/obj2yaml.h
@@ -10,8 +10,8 @@
 // source file, implement it.
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_TOOLS_OBJ2YAML_H
-#define LLVM_TOOLS_OBJ2YAML_H
+#ifndef LLVM_TOOLS_OBJ2YAML_OBJ2YAML_H
+#define LLVM_TOOLS_OBJ2YAML_OBJ2YAML_H
 
 #include "llvm/Object/COFF.h"
 #include "llvm/Support/raw_ostream.h"
diff --git a/tools/opt/BreakpointPrinter.cpp b/tools/opt/BreakpointPrinter.cpp
index 44f4a11773ef..3cbc0ae50f14 100644
--- a/tools/opt/BreakpointPrinter.cpp
+++ b/tools/opt/BreakpointPrinter.cpp
@@ -62,7 +62,7 @@ struct BreakpointPrinter : public ModulePass {
           continue;
         getContextName(SP.getContext().resolve(TypeIdentifierMap), Name);
         Name = Name + SP.getDisplayName().str();
-        if (!Name.empty() && Processed.insert(Name)) {
+        if (!Name.empty() && Processed.insert(Name).second) {
           Out << Name << "\n";
         }
       }
diff --git a/tools/opt/NewPMDriver.cpp b/tools/opt/NewPMDriver.cpp
index 8076ff44872f..f215c77459a8 100644
--- a/tools/opt/NewPMDriver.cpp
+++ b/tools/opt/NewPMDriver.cpp
@@ -17,8 +17,8 @@
 #include "Passes.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Analysis/CGSCCPassManager.h"
-#include "llvm/Analysis/LazyCallGraph.h"
 #include "llvm/Bitcode/BitcodeWriterPass.h"
+#include "llvm/IR/Dominators.h"
 #include "llvm/IR/IRPrintingPasses.h"
 #include "llvm/IR/LLVMContext.h"
 #include "llvm/IR/Module.h"
@@ -31,24 +31,21 @@
 using namespace llvm;
 using namespace opt_tool;
 
+static cl::opt<bool>
+    DebugPM("debug-pass-manager", cl::Hidden,
+            cl::desc("Print pass management debugging information"));
+
 bool llvm::runPassPipeline(StringRef Arg0, LLVMContext &Context, Module &M,
                            tool_output_file *Out, StringRef PassPipeline,
                            OutputKind OK, VerifierKind VK) {
-  FunctionAnalysisManager FAM;
-  CGSCCAnalysisManager CGAM;
-  ModuleAnalysisManager MAM;
-
-#define MODULE_ANALYSIS(NAME, CREATE_PASS) \
-  MAM.registerPass(CREATE_PASS);
-#include "PassRegistry.def"
-
-#define CGSCC_ANALYSIS(NAME, CREATE_PASS) \
-  CGAM.registerPass(CREATE_PASS);
-#include "PassRegistry.def"
+  FunctionAnalysisManager FAM(DebugPM);
+  CGSCCAnalysisManager CGAM(DebugPM);
+  ModuleAnalysisManager MAM(DebugPM);
 
-#define FUNCTION_ANALYSIS(NAME, CREATE_PASS) \
-  FAM.registerPass(CREATE_PASS);
-#include "PassRegistry.def"
+  // Register all the basic analyses with the managers.
+  registerModuleAnalyses(MAM);
+  registerCGSCCAnalyses(CGAM);
+  registerFunctionAnalyses(FAM);
 
   // Cross register the analysis managers through their proxies.
   MAM.registerPass(FunctionAnalysisManagerModuleProxy(FAM));
@@ -58,11 +55,11 @@ bool llvm::runPassPipeline(StringRef Arg0, LLVMContext &Context, Module &M,
   FAM.registerPass(CGSCCAnalysisManagerFunctionProxy(CGAM));
   FAM.registerPass(ModuleAnalysisManagerFunctionProxy(MAM));
 
-  ModulePassManager MPM;
+  ModulePassManager MPM(DebugPM);
   if (VK > VK_NoVerifier)
     MPM.addPass(VerifierPass());
 
-  if (!parsePassPipeline(MPM, PassPipeline, VK == VK_VerifyEachPass)) {
+  if (!parsePassPipeline(MPM, PassPipeline, VK == VK_VerifyEachPass, DebugPM)) {
     errs() << Arg0 << ": unable to parse pass pipeline description.\n";
     return false;
   }
@@ -86,7 +83,7 @@ bool llvm::runPassPipeline(StringRef Arg0, LLVMContext &Context, Module &M,
   cl::PrintOptionValues();
 
   // Now that we have all of the passes ready, run them.
-  MPM.run(&M, &MAM);
+  MPM.run(M, &MAM);
 
   // Declare success.
   if (OK != OK_NoOutput)
diff --git a/tools/opt/NewPMDriver.h b/tools/opt/NewPMDriver.h
index 3661d3e6778a..f977baca7f83 100644
--- a/tools/opt/NewPMDriver.h
+++ b/tools/opt/NewPMDriver.h
@@ -18,8 +18,8 @@
 ///
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_TOOLS_OPT_NEW_PM_DRIVER_H
-#define LLVM_TOOLS_OPT_NEW_PM_DRIVER_H
+#ifndef LLVM_TOOLS_OPT_NEWPMDRIVER_H
+#define LLVM_TOOLS_OPT_NEWPMDRIVER_H
 
 #include "llvm/ADT/StringRef.h"
 
diff --git a/tools/opt/PassRegistry.def b/tools/opt/PassRegistry.def
index e1e49004c741..c98de60b5706 100644
--- a/tools/opt/PassRegistry.def
+++ b/tools/opt/PassRegistry.def
@@ -20,32 +20,46 @@
 #define MODULE_ANALYSIS(NAME, CREATE_PASS)
 #endif
 MODULE_ANALYSIS("lcg", LazyCallGraphAnalysis())
+MODULE_ANALYSIS("no-op-module", NoOpModuleAnalysis())
 #undef MODULE_ANALYSIS
 
 #ifndef MODULE_PASS
 #define MODULE_PASS(NAME, CREATE_PASS)
 #endif
+MODULE_PASS("invalidate<all>", InvalidateAllAnalysesPass())
+MODULE_PASS("no-op-module", NoOpModulePass())
 MODULE_PASS("print", PrintModulePass(dbgs()))
 MODULE_PASS("print-cg", LazyCallGraphPrinterPass(dbgs()))
+MODULE_PASS("verify", VerifierPass())
 #undef MODULE_PASS
 
 #ifndef CGSCC_ANALYSIS
 #define CGSCC_ANALYSIS(NAME, CREATE_PASS)
 #endif
+CGSCC_ANALYSIS("no-op-cgscc", NoOpCGSCCAnalysis())
 #undef CGSCC_ANALYSIS
 
 #ifndef CGSCC_PASS
 #define CGSCC_PASS(NAME, CREATE_PASS)
 #endif
+CGSCC_PASS("invalidate<all>", InvalidateAllAnalysesPass())
+CGSCC_PASS("no-op-cgscc", NoOpCGSCCPass())
 #undef CGSCC_PASS
 
 #ifndef FUNCTION_ANALYSIS
 #define FUNCTION_ANALYSIS(NAME, CREATE_PASS)
 #endif
+FUNCTION_ANALYSIS("domtree", DominatorTreeAnalysis())
+FUNCTION_ANALYSIS("no-op-function", NoOpFunctionAnalysis())
 #undef FUNCTION_ANALYSIS
 
 #ifndef FUNCTION_PASS
 #define FUNCTION_PASS(NAME, CREATE_PASS)
 #endif
+FUNCTION_PASS("invalidate<all>", InvalidateAllAnalysesPass())
+FUNCTION_PASS("no-op-function", NoOpFunctionPass())
 FUNCTION_PASS("print", PrintFunctionPass(dbgs()))
+FUNCTION_PASS("print<domtree>", DominatorTreePrinterPass(dbgs()))
+FUNCTION_PASS("verify", VerifierPass())
+FUNCTION_PASS("verify<domtree>", DominatorTreeVerifierPass())
 #undef FUNCTION_PASS
diff --git a/tools/opt/Passes.cpp b/tools/opt/Passes.cpp
index a171f42691a8..518112a1c88c 100644
--- a/tools/opt/Passes.cpp
+++ b/tools/opt/Passes.cpp
@@ -17,6 +17,7 @@
 #include "Passes.h"
 #include "llvm/Analysis/CGSCCPassManager.h"
 #include "llvm/Analysis/LazyCallGraph.h"
+#include "llvm/IR/Dominators.h"
 #include "llvm/IR/IRPrintingPasses.h"
 #include "llvm/IR/PassManager.h"
 #include "llvm/IR/Verifier.h"
@@ -28,96 +29,167 @@ namespace {
 
 /// \brief No-op module pass which does nothing.
 struct NoOpModulePass {
-  PreservedAnalyses run(Module *M) { return PreservedAnalyses::all(); }
+  PreservedAnalyses run(Module &M) { return PreservedAnalyses::all(); }
   static StringRef name() { return "NoOpModulePass"; }
 };
 
+/// \brief No-op module analysis.
+struct NoOpModuleAnalysis {
+  struct Result {};
+  Result run(Module &) { return Result(); }
+  static StringRef name() { return "NoOpModuleAnalysis"; }
+  static void *ID() { return (void *)&PassID; }
+private:
+  static char PassID;
+};
+
+char NoOpModuleAnalysis::PassID;
+
 /// \brief No-op CGSCC pass which does nothing.
 struct NoOpCGSCCPass {
-  PreservedAnalyses run(LazyCallGraph::SCC *C) {
+  PreservedAnalyses run(LazyCallGraph::SCC &C) {
     return PreservedAnalyses::all();
   }
   static StringRef name() { return "NoOpCGSCCPass"; }
 };
 
+/// \brief No-op CGSCC analysis.
+struct NoOpCGSCCAnalysis {
+  struct Result {};
+  Result run(LazyCallGraph::SCC &) { return Result(); }
+  static StringRef name() { return "NoOpCGSCCAnalysis"; }
+  static void *ID() { return (void *)&PassID; }
+private:
+  static char PassID;
+};
+
+char NoOpCGSCCAnalysis::PassID;
+
 /// \brief No-op function pass which does nothing.
 struct NoOpFunctionPass {
-  PreservedAnalyses run(Function *F) { return PreservedAnalyses::all(); }
+  PreservedAnalyses run(Function &F) { return PreservedAnalyses::all(); }
   static StringRef name() { return "NoOpFunctionPass"; }
 };
 
+/// \brief No-op function analysis.
+struct NoOpFunctionAnalysis {
+  struct Result {};
+  Result run(Function &) { return Result(); }
+  static StringRef name() { return "NoOpFunctionAnalysis"; }
+  static void *ID() { return (void *)&PassID; }
+private:
+  static char PassID;
+};
+
+char NoOpFunctionAnalysis::PassID;
+
 } // End anonymous namespace.
 
-static bool isModulePassName(StringRef Name) {
-  if (Name == "no-op-module") return true;
+void llvm::registerModuleAnalyses(ModuleAnalysisManager &MAM) {
+#define MODULE_ANALYSIS(NAME, CREATE_PASS) \
+  MAM.registerPass(CREATE_PASS);
+#include "PassRegistry.def"
+}
 
+void llvm::registerCGSCCAnalyses(CGSCCAnalysisManager &CGAM) {
+#define CGSCC_ANALYSIS(NAME, CREATE_PASS) \
+  CGAM.registerPass(CREATE_PASS);
+#include "PassRegistry.def"
+}
+
+void llvm::registerFunctionAnalyses(FunctionAnalysisManager &FAM) {
+#define FUNCTION_ANALYSIS(NAME, CREATE_PASS) \
+  FAM.registerPass(CREATE_PASS);
+#include "PassRegistry.def"
+}
+
+#ifndef NDEBUG
+static bool isModulePassName(StringRef Name) {
 #define MODULE_PASS(NAME, CREATE_PASS) if (Name == NAME) return true;
+#define MODULE_ANALYSIS(NAME, CREATE_PASS)                                     \
+  if (Name == "require<" NAME ">" || Name == "invalidate<" NAME ">")           \
+    return true;
 #include "PassRegistry.def"
 
   return false;
 }
+#endif
 
 static bool isCGSCCPassName(StringRef Name) {
-  if (Name == "no-op-cgscc") return true;
-
 #define CGSCC_PASS(NAME, CREATE_PASS) if (Name == NAME) return true;
+#define CGSCC_ANALYSIS(NAME, CREATE_PASS)                                      \
+  if (Name == "require<" NAME ">" || Name == "invalidate<" NAME ">")           \
+    return true;
 #include "PassRegistry.def"
 
   return false;
 }
 
 static bool isFunctionPassName(StringRef Name) {
-  if (Name == "no-op-function") return true;
-
 #define FUNCTION_PASS(NAME, CREATE_PASS) if (Name == NAME) return true;
+#define FUNCTION_ANALYSIS(NAME, CREATE_PASS)                                   \
+  if (Name == "require<" NAME ">" || Name == "invalidate<" NAME ">")           \
+    return true;
 #include "PassRegistry.def"
 
   return false;
 }
 
 static bool parseModulePassName(ModulePassManager &MPM, StringRef Name) {
-  if (Name == "no-op-module") {
-    MPM.addPass(NoOpModulePass());
-    return true;
-  }
-
 #define MODULE_PASS(NAME, CREATE_PASS)                                         \
   if (Name == NAME) {                                                          \
     MPM.addPass(CREATE_PASS);                                                  \
     return true;                                                               \
   }
+#define MODULE_ANALYSIS(NAME, CREATE_PASS)                                     \
+  if (Name == "require<" NAME ">") {                                           \
+    MPM.addPass(RequireAnalysisPass<decltype(CREATE_PASS)>());                 \
+    return true;                                                               \
+  }                                                                            \
+  if (Name == "invalidate<" NAME ">") {                                        \
+    MPM.addPass(InvalidateAnalysisPass<decltype(CREATE_PASS)>());              \
+    return true;                                                               \
+  }
 #include "PassRegistry.def"
 
   return false;
 }
 
 static bool parseCGSCCPassName(CGSCCPassManager &CGPM, StringRef Name) {
-  if (Name == "no-op-cgscc") {
-    CGPM.addPass(NoOpCGSCCPass());
-    return true;
-  }
-
 #define CGSCC_PASS(NAME, CREATE_PASS)                                          \
   if (Name == NAME) {                                                          \
     CGPM.addPass(CREATE_PASS);                                                 \
     return true;                                                               \
   }
+#define CGSCC_ANALYSIS(NAME, CREATE_PASS)                                      \
+  if (Name == "require<" NAME ">") {                                           \
+    CGPM.addPass(RequireAnalysisPass<decltype(CREATE_PASS)>());                \
+    return true;                                                               \
+  }                                                                            \
+  if (Name == "invalidate<" NAME ">") {                                        \
+    CGPM.addPass(InvalidateAnalysisPass<decltype(CREATE_PASS)>());             \
+    return true;                                                               \
+  }
 #include "PassRegistry.def"
 
   return false;
 }
 
 static bool parseFunctionPassName(FunctionPassManager &FPM, StringRef Name) {
-  if (Name == "no-op-function") {
-    FPM.addPass(NoOpFunctionPass());
-    return true;
-  }
-
 #define FUNCTION_PASS(NAME, CREATE_PASS)                                       \
   if (Name == NAME) {                                                          \
     FPM.addPass(CREATE_PASS);                                                  \
     return true;                                                               \
   }
+#define FUNCTION_ANALYSIS(NAME, CREATE_PASS)                                   \
+  if (Name == "require<" NAME ">") {                                           \
+    FPM.addPass(RequireAnalysisPass<decltype(CREATE_PASS)>());                 \
+    return true;                                                               \
+  }                                                                            \
+  if (Name == "invalidate<" NAME ">") {                                        \
+    FPM.addPass(InvalidateAnalysisPass<decltype(CREATE_PASS)>());              \
+    return true;                                                               \
+  }
 #include "PassRegistry.def"
 
   return false;
@@ -125,15 +197,16 @@ static bool parseFunctionPassName(FunctionPassManager &FPM, StringRef Name) {
 
 static bool parseFunctionPassPipeline(FunctionPassManager &FPM,
                                       StringRef &PipelineText,
-                                      bool VerifyEachPass) {
+                                      bool VerifyEachPass, bool DebugLogging) {
   for (;;) {
     // Parse nested pass managers by recursing.
     if (PipelineText.startswith("function(")) {
-      FunctionPassManager NestedFPM;
+      FunctionPassManager NestedFPM(DebugLogging);
 
       // Parse the inner pipeline inte the nested manager.
       PipelineText = PipelineText.substr(strlen("function("));
-      if (!parseFunctionPassPipeline(NestedFPM, PipelineText, VerifyEachPass) ||
+      if (!parseFunctionPassPipeline(NestedFPM, PipelineText, VerifyEachPass,
+                                     DebugLogging) ||
           PipelineText.empty())
         return false;
       assert(PipelineText[0] == ')');
@@ -161,16 +234,17 @@ static bool parseFunctionPassPipeline(FunctionPassManager &FPM,
 }
 
 static bool parseCGSCCPassPipeline(CGSCCPassManager &CGPM,
-                                      StringRef &PipelineText,
-                                      bool VerifyEachPass) {
+                                   StringRef &PipelineText, bool VerifyEachPass,
+                                   bool DebugLogging) {
   for (;;) {
     // Parse nested pass managers by recursing.
     if (PipelineText.startswith("cgscc(")) {
-      CGSCCPassManager NestedCGPM;
+      CGSCCPassManager NestedCGPM(DebugLogging);
 
       // Parse the inner pipeline into the nested manager.
       PipelineText = PipelineText.substr(strlen("cgscc("));
-      if (!parseCGSCCPassPipeline(NestedCGPM, PipelineText, VerifyEachPass) ||
+      if (!parseCGSCCPassPipeline(NestedCGPM, PipelineText, VerifyEachPass,
+                                  DebugLogging) ||
           PipelineText.empty())
         return false;
       assert(PipelineText[0] == ')');
@@ -179,11 +253,12 @@ static bool parseCGSCCPassPipeline(CGSCCPassManager &CGPM,
       // Add the nested pass manager with the appropriate adaptor.
       CGPM.addPass(std::move(NestedCGPM));
     } else if (PipelineText.startswith("function(")) {
-      FunctionPassManager NestedFPM;
+      FunctionPassManager NestedFPM(DebugLogging);
 
       // Parse the inner pipeline inte the nested manager.
       PipelineText = PipelineText.substr(strlen("function("));
-      if (!parseFunctionPassPipeline(NestedFPM, PipelineText, VerifyEachPass) ||
+      if (!parseFunctionPassPipeline(NestedFPM, PipelineText, VerifyEachPass,
+                                     DebugLogging) ||
           PipelineText.empty())
         return false;
       assert(PipelineText[0] == ')');
@@ -211,15 +286,16 @@ static bool parseCGSCCPassPipeline(CGSCCPassManager &CGPM,
 
 static bool parseModulePassPipeline(ModulePassManager &MPM,
                                     StringRef &PipelineText,
-                                    bool VerifyEachPass) {
+                                    bool VerifyEachPass, bool DebugLogging) {
   for (;;) {
     // Parse nested pass managers by recursing.
     if (PipelineText.startswith("module(")) {
-      ModulePassManager NestedMPM;
+      ModulePassManager NestedMPM(DebugLogging);
 
       // Parse the inner pipeline into the nested manager.
       PipelineText = PipelineText.substr(strlen("module("));
-      if (!parseModulePassPipeline(NestedMPM, PipelineText, VerifyEachPass) ||
+      if (!parseModulePassPipeline(NestedMPM, PipelineText, VerifyEachPass,
+                                   DebugLogging) ||
           PipelineText.empty())
         return false;
       assert(PipelineText[0] == ')');
@@ -228,11 +304,12 @@ static bool parseModulePassPipeline(ModulePassManager &MPM,
       // Now add the nested manager as a module pass.
       MPM.addPass(std::move(NestedMPM));
     } else if (PipelineText.startswith("cgscc(")) {
-      CGSCCPassManager NestedCGPM;
+      CGSCCPassManager NestedCGPM(DebugLogging);
 
       // Parse the inner pipeline inte the nested manager.
       PipelineText = PipelineText.substr(strlen("cgscc("));
-      if (!parseCGSCCPassPipeline(NestedCGPM, PipelineText, VerifyEachPass) ||
+      if (!parseCGSCCPassPipeline(NestedCGPM, PipelineText, VerifyEachPass,
+                                  DebugLogging) ||
           PipelineText.empty())
         return false;
       assert(PipelineText[0] == ')');
@@ -242,11 +319,12 @@ static bool parseModulePassPipeline(ModulePassManager &MPM,
       MPM.addPass(
           createModuleToPostOrderCGSCCPassAdaptor(std::move(NestedCGPM)));
     } else if (PipelineText.startswith("function(")) {
-      FunctionPassManager NestedFPM;
+      FunctionPassManager NestedFPM(DebugLogging);
 
       // Parse the inner pipeline inte the nested manager.
       PipelineText = PipelineText.substr(strlen("function("));
-      if (!parseFunctionPassPipeline(NestedFPM, PipelineText, VerifyEachPass) ||
+      if (!parseFunctionPassPipeline(NestedFPM, PipelineText, VerifyEachPass,
+                                     DebugLogging) ||
           PipelineText.empty())
         return false;
       assert(PipelineText[0] == ')');
@@ -277,47 +355,38 @@ static bool parseModulePassPipeline(ModulePassManager &MPM,
 // FIXME: Should this routine accept a TargetMachine or require the caller to
 // pre-populate the analysis managers with target-specific stuff?
 bool llvm::parsePassPipeline(ModulePassManager &MPM, StringRef PipelineText,
-                             bool VerifyEachPass) {
-  // Look at the first entry to figure out which layer to start parsing at.
-  if (PipelineText.startswith("module("))
-    return parseModulePassPipeline(MPM, PipelineText, VerifyEachPass) &&
-           PipelineText.empty();
-  if (PipelineText.startswith("cgscc(")) {
-    CGSCCPassManager CGPM;
-    if (!parseCGSCCPassPipeline(CGPM, PipelineText, VerifyEachPass) ||
-        !PipelineText.empty())
-      return false;
-    MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM)));
-    return true;
-  }
-  if (PipelineText.startswith("function(")) {
-    FunctionPassManager FPM;
-    if (!parseFunctionPassPipeline(FPM, PipelineText, VerifyEachPass) ||
-        !PipelineText.empty())
-      return false;
-    MPM.addPass(createModuleToFunctionPassAdaptor(std::move(FPM)));
-    return true;
-  }
-
-  // This isn't a direct pass manager name, look for the end of a pass name.
+                             bool VerifyEachPass, bool DebugLogging) {
+  // By default, try to parse the pipeline as-if it were within an implicit
+  // 'module(...)' pass pipeline. If this will parse at all, it needs to
+  // consume the entire string.
+  if (parseModulePassPipeline(MPM, PipelineText, VerifyEachPass, DebugLogging))
+    return PipelineText.empty();
+
+  // This isn't parsable as a module pipeline, look for the end of a pass name
+  // and directly drop down to that layer.
   StringRef FirstName =
       PipelineText.substr(0, PipelineText.find_first_of(",)"));
-  if (isModulePassName(FirstName))
-    return parseModulePassPipeline(MPM, PipelineText, VerifyEachPass) &&
-           PipelineText.empty();
+  assert(!isModulePassName(FirstName) &&
+         "Already handled all module pipeline options.");
 
+  // If this looks like a CGSCC pass, parse the whole thing as a CGSCC
+  // pipeline.
   if (isCGSCCPassName(FirstName)) {
-    CGSCCPassManager CGPM;
-    if (!parseCGSCCPassPipeline(CGPM, PipelineText, VerifyEachPass) ||
+    CGSCCPassManager CGPM(DebugLogging);
+    if (!parseCGSCCPassPipeline(CGPM, PipelineText, VerifyEachPass,
+                                DebugLogging) ||
         !PipelineText.empty())
       return false;
     MPM.addPass(createModuleToPostOrderCGSCCPassAdaptor(std::move(CGPM)));
     return true;
   }
 
+  // Similarly, if this looks like a Function pass, parse the whole thing as
+  // a Function pipelien.
   if (isFunctionPassName(FirstName)) {
-    FunctionPassManager FPM;
-    if (!parseFunctionPassPipeline(FPM, PipelineText, VerifyEachPass) ||
+    FunctionPassManager FPM(DebugLogging);
+    if (!parseFunctionPassPipeline(FPM, PipelineText, VerifyEachPass,
+                                   DebugLogging) ||
         !PipelineText.empty())
       return false;
     MPM.addPass(createModuleToFunctionPassAdaptor(std::move(FPM)));
diff --git a/tools/opt/Passes.h b/tools/opt/Passes.h
index 3bd675269245..623da9ff4b4a 100644
--- a/tools/opt/Passes.h
+++ b/tools/opt/Passes.h
@@ -17,9 +17,31 @@
 #define LLVM_TOOLS_OPT_PASSES_H
 
 #include "llvm/ADT/StringRef.h"
+#include "llvm/Analysis/CGSCCPassManager.h"
+#include "llvm/IR/PassManager.h"
 
 namespace llvm {
-class ModulePassManager;
+
+/// \brief Registers all available module analysis passes.
+///
+/// This is an interface that can be used to populate a \c
+/// ModuleAnalysisManager with all registered module analyses. Callers can
+/// still manually register any additional analyses.
+void registerModuleAnalyses(ModuleAnalysisManager &MAM);
+
+/// \brief Registers all available CGSCC analysis passes.
+///
+/// This is an interface that can be used to populate a \c CGSCCAnalysisManager
+/// with all registered CGSCC analyses. Callers can still manually register any
+/// additional analyses.
+void registerCGSCCAnalyses(CGSCCAnalysisManager &CGAM);
+
+/// \brief Registers all available function analysis passes.
+///
+/// This is an interface that can be used to populate a \c
+/// FunctionAnalysisManager with all registered function analyses. Callers can
+/// still manually register any additional analyses.
+void registerFunctionAnalyses(FunctionAnalysisManager &FAM);
 
 /// \brief Parse a textual pass pipeline description into a \c ModulePassManager.
 ///
@@ -50,8 +72,7 @@ class ModulePassManager;
 /// an error. You cannot mix different levels implicitly, you must explicitly
 /// form a pass manager in which to nest passes.
 bool parsePassPipeline(ModulePassManager &MPM, StringRef PipelineText,
-                       bool VerifyEachPass = true);
-
+                       bool VerifyEachPass = true, bool DebugLogging = false);
 }
 
 #endif
diff --git a/tools/opt/opt.cpp b/tools/opt/opt.cpp
index 6ba6340040b3..986758908061 100644
--- a/tools/opt/opt.cpp
+++ b/tools/opt/opt.cpp
@@ -109,14 +109,6 @@ DisableOptimizations("disable-opt",
                      cl::desc("Do not run any optimization passes"));
 
 static cl::opt<bool>
-DisableInternalize("disable-internalize",
-                   cl::desc("Do not mark all symbols as internal"));
-
-static cl::opt<bool>
-StandardCompileOpts("std-compile-opts",
-                   cl::desc("Include the standard compile time optimizations"));
-
-static cl::opt<bool>
 StandardLinkOpts("std-link-opts",
                  cl::desc("Include the standard link time optimizations"));
 
@@ -145,7 +137,7 @@ TargetTriple("mtriple", cl::desc("Override target triple for module"));
 
 static cl::opt<bool>
 UnitAtATime("funit-at-a-time",
-            cl::desc("Enable IPO. This is same as llvm-gcc's -funit-at-a-time"),
+            cl::desc("Enable IPO. This corresponds to gcc's -funit-at-a-time"),
             cl::init(true));
 
 static cl::opt<bool>
@@ -198,9 +190,8 @@ static inline void addPass(PassManagerBase &PM, Pass *P) {
   }
 }
 
-/// AddOptimizationPasses - This routine adds optimization passes
-/// based on selected optimization level, OptLevel. This routine
-/// duplicates llvm-gcc behaviour.
+/// This routine adds optimization passes based on selected optimization level,
+/// OptLevel.
 ///
 /// OptLevel - Optimization Level
 static void AddOptimizationPasses(PassManagerBase &MPM,FunctionPassManager &FPM,
@@ -238,41 +229,16 @@ static void AddOptimizationPasses(PassManagerBase &MPM,FunctionPassManager &FPM,
   Builder.populateModulePassManager(MPM);
 }
 
-static void AddStandardCompilePasses(PassManagerBase &PM) {
-  PM.add(createVerifierPass());                  // Verify that input is correct
-
-  // If the -strip-debug command line option was specified, do it.
-  if (StripDebug)
-    addPass(PM, createStripSymbolsPass(true));
-
-  // Verify debug info only after it's (possibly) stripped.
-  PM.add(createDebugInfoVerifierPass());
-
-  if (DisableOptimizations) return;
-
-  // -std-compile-opts adds the same module passes as -O3.
+static void AddStandardLinkPasses(PassManagerBase &PM) {
   PassManagerBuilder Builder;
+  Builder.VerifyInput = true;
+  Builder.StripDebug = StripDebug;
+  if (DisableOptimizations)
+    Builder.OptLevel = 0;
+
   if (!DisableInline)
     Builder.Inliner = createFunctionInliningPass();
-  Builder.OptLevel = 3;
-  Builder.populateModulePassManager(PM);
-}
-
-static void AddStandardLinkPasses(PassManagerBase &PM) {
-  PM.add(createVerifierPass());                  // Verify that input is correct
-
-  // If the -strip-debug command line option was specified, do it.
-  if (StripDebug)
-    addPass(PM, createStripSymbolsPass(true));
-
-  // Verify debug info only after it's (possibly) stripped.
-  PM.add(createDebugInfoVerifierPass());
-
-  if (DisableOptimizations) return;
-
-  PassManagerBuilder Builder;
-  Builder.populateLTOPassManager(PM, /*Internalize=*/ !DisableInternalize,
-                                 /*RunInliner=*/ !DisableInline);
+  Builder.populateLTOPassManager(PM);
 }
 
 //===----------------------------------------------------------------------===//
@@ -341,7 +307,6 @@ int main(int argc, char **argv) {
   // Initialize passes
   PassRegistry &Registry = *PassRegistry::getPassRegistry();
   initializeCore(Registry);
-  initializeDebugIRPass(Registry);
   initializeScalarOpts(Registry);
   initializeObjCARCOpts(Registry);
   initializeVectorization(Registry);
@@ -355,7 +320,8 @@ int main(int argc, char **argv) {
   // For codegen passes, only passes that do IR to IR transformation are
   // supported.
   initializeCodeGenPreparePass(Registry);
-  initializeAtomicExpandLoadLinkedPass(Registry);
+  initializeAtomicExpandPass(Registry);
+  initializeRewriteSymbolsPass(Registry);
 
 #ifdef LINK_POLLY_INTO_TOOLS
   polly::initializePollyPasses(Registry);
@@ -372,10 +338,9 @@ int main(int argc, char **argv) {
   SMDiagnostic Err;
 
   // Load the input module...
-  std::unique_ptr<Module> M;
-  M.reset(ParseIRFile(InputFilename, Err, Context));
+  std::unique_ptr<Module> M = parseIRFile(InputFilename, Err, Context);
 
-  if (!M.get()) {
+  if (!M) {
     Err.print(argv[0], errs());
     return 1;
   }
@@ -395,11 +360,10 @@ int main(int argc, char **argv) {
     if (OutputFilename.empty())
       OutputFilename = "-";
 
-    std::string ErrorInfo;
-    Out.reset(new tool_output_file(OutputFilename.c_str(), ErrorInfo,
-                                   sys::fs::F_None));
-    if (!ErrorInfo.empty()) {
-      errs() << ErrorInfo << '\n';
+    std::error_code EC;
+    Out.reset(new tool_output_file(OutputFilename, EC, sys::fs::F_None));
+    if (EC) {
+      errs() << EC.message() << '\n';
       return 1;
     }
   }
@@ -425,7 +389,7 @@ int main(int argc, char **argv) {
     // The user has asked to use the new pass manager and provided a pipeline
     // string. Hand off the rest of the functionality to the new code for that
     // layer.
-    return runPassPipeline(argv[0], Context, *M.get(), Out.get(), PassPipeline,
+    return runPassPipeline(argv[0], Context, *M, Out.get(), PassPipeline,
                            OK, VK)
                ? 0
                : 1;
@@ -445,14 +409,14 @@ int main(int argc, char **argv) {
   Passes.add(TLI);
 
   // Add an appropriate DataLayout instance for this module.
-  const DataLayout *DL = M.get()->getDataLayout();
+  const DataLayout *DL = M->getDataLayout();
   if (!DL && !DefaultDataLayout.empty()) {
     M->setDataLayout(DefaultDataLayout);
-    DL = M.get()->getDataLayout();
+    DL = M->getDataLayout();
   }
 
   if (DL)
-    Passes.add(new DataLayoutPass(M.get()));
+    Passes.add(new DataLayoutPass());
 
   Triple ModuleTriple(M->getTargetTriple());
   TargetMachine *Machine = nullptr;
@@ -461,15 +425,15 @@ int main(int argc, char **argv) {
   std::unique_ptr<TargetMachine> TM(Machine);
 
   // Add internal analysis passes from the target machine.
-  if (TM.get())
+  if (TM)
     TM->addAnalysisPasses(Passes);
 
   std::unique_ptr<FunctionPassManager> FPasses;
   if (OptLevelO1 || OptLevelO2 || OptLevelOs || OptLevelOz || OptLevelO3) {
     FPasses.reset(new FunctionPassManager(M.get()));
     if (DL)
-      FPasses->add(new DataLayoutPass(M.get()));
-    if (TM.get())
+      FPasses->add(new DataLayoutPass());
+    if (TM)
       TM->addAnalysisPasses(*FPasses);
 
   }
@@ -480,11 +444,11 @@ int main(int argc, char **argv) {
       if (OutputFilename.empty())
         OutputFilename = "-";
 
-      std::string ErrorInfo;
-      Out.reset(new tool_output_file(OutputFilename.c_str(), ErrorInfo,
-                                     sys::fs::F_None));
-      if (!ErrorInfo.empty()) {
-        errs() << ErrorInfo << '\n';
+      std::error_code EC;
+      Out = llvm::make_unique<tool_output_file>(OutputFilename, EC,
+                                                sys::fs::F_None);
+      if (EC) {
+        errs() << EC.message() << '\n';
         return 1;
       }
     }
@@ -492,21 +456,12 @@ int main(int argc, char **argv) {
     NoOutput = true;
   }
 
-  // If the -strip-debug command line option was specified, add it.  If
-  // -std-compile-opts was also specified, it will handle StripDebug.
-  if (StripDebug && !StandardCompileOpts)
+  // If the -strip-debug command line option was specified, add it.
+  if (StripDebug)
     addPass(Passes, createStripSymbolsPass(true));
 
   // Create a new optimization pass for each one specified on the command line
   for (unsigned i = 0; i < PassList.size(); ++i) {
-    // Check to see if -std-compile-opts was specified before this option.  If
-    // so, handle it.
-    if (StandardCompileOpts &&
-        StandardCompileOpts.getPosition() < PassList.getPosition(i)) {
-      AddStandardCompilePasses(Passes);
-      StandardCompileOpts = false;
-    }
-
     if (StandardLinkOpts &&
         StandardLinkOpts.getPosition() < PassList.getPosition(i)) {
       AddStandardLinkPasses(Passes);
@@ -579,12 +534,6 @@ int main(int argc, char **argv) {
       Passes.add(createPrintModulePass(errs()));
   }
 
-  // If -std-compile-opts was specified at the end of the pass list, add them.
-  if (StandardCompileOpts) {
-    AddStandardCompilePasses(Passes);
-    StandardCompileOpts = false;
-  }
-
   if (StandardLinkOpts) {
     AddStandardLinkPasses(Passes);
     StandardLinkOpts = false;
@@ -607,8 +556,8 @@ int main(int argc, char **argv) {
 
   if (OptLevelO1 || OptLevelO2 || OptLevelOs || OptLevelOz || OptLevelO3) {
     FPasses->doInitialization();
-    for (Module::iterator F = M->begin(), E = M->end(); F != E; ++F)
-      FPasses->run(*F);
+    for (Function &F : *M)
+      FPasses->run(F);
     FPasses->doFinalization();
   }
 
@@ -630,7 +579,7 @@ int main(int argc, char **argv) {
   cl::PrintOptionValues();
 
   // Now that we have all of the passes ready, run them.
-  Passes.run(*M.get());
+  Passes.run(*M);
 
   // Declare success.
   if (!NoOutput || PrintBreakpoints)
diff --git a/tools/verify-uselistorder/CMakeLists.txt b/tools/verify-uselistorder/CMakeLists.txt
new file mode 100644
index 000000000000..260a95adb6a6
--- /dev/null
+++ b/tools/verify-uselistorder/CMakeLists.txt
@@ -0,0 +1,12 @@
+set(LLVM_LINK_COMPONENTS
+  AsmParser
+  BitReader
+  BitWriter
+  Core
+  IRReader
+  Support
+  )
+
+add_llvm_tool(verify-uselistorder
+  verify-uselistorder.cpp
+  )
diff --git a/tools/verify-uselistorder/LLVMBuild.txt b/tools/verify-uselistorder/LLVMBuild.txt
new file mode 100644
index 000000000000..23957c189c8a
--- /dev/null
+++ b/tools/verify-uselistorder/LLVMBuild.txt
@@ -0,0 +1,22 @@
+;===- ./tools/verify-uselistorder/LLVMBuild.txt ----------------*- Conf -*--===;
+;
+;                     The LLVM Compiler Infrastructure
+;
+; This file is distributed under the University of Illinois Open Source
+; License. See LICENSE.TXT for details.
+;
+;===------------------------------------------------------------------------===;
+;
+; This is an LLVMBuild description file for the components in this subdirectory.
+;
+; For more information on the LLVMBuild system, please see:
+;
+;   http://llvm.org/docs/LLVMBuild.html
+;
+;===------------------------------------------------------------------------===;
+
+[component_0]
+type = Tool
+name = verify-uselistorder
+parent = Tools
+required_libraries = IRReader BitWriter Support
diff --git a/tools/verify-uselistorder/Makefile b/tools/verify-uselistorder/Makefile
new file mode 100644
index 000000000000..90d2aa89128b
--- /dev/null
+++ b/tools/verify-uselistorder/Makefile
@@ -0,0 +1,17 @@
+##===- tools/verify-uselistorder/Makefile ------------------*- Makefile -*-===##
+#
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+##===----------------------------------------------------------------------===##
+
+LEVEL := ../..
+TOOLNAME := verify-uselistorder
+LINK_COMPONENTS := AsmParser BitReader BitWriter Core IRReader Support
+
+# This tool has no plugins, optimize startup time.
+TOOL_NO_EXPORTS := 1
+
+include $(LEVEL)/Makefile.common
diff --git a/tools/verify-uselistorder/verify-uselistorder.cpp b/tools/verify-uselistorder/verify-uselistorder.cpp
new file mode 100644
index 000000000000..a6536083e880
--- /dev/null
+++ b/tools/verify-uselistorder/verify-uselistorder.cpp
@@ -0,0 +1,568 @@
+//===- verify-uselistorder.cpp - The LLVM Modular Optimizer ---------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Verify that use-list order can be serialized correctly.  After reading the
+// provided IR, this tool shuffles the use-lists and then writes and reads to a
+// separate Module whose use-list orders are compared to the original.
+//
+// The shuffles are deterministic, but guarantee that use-lists will change.
+// The algorithm per iteration is as follows:
+//
+//  1. Seed the random number generator.  The seed is different for each
+//     shuffle.  Shuffle 0 uses default+0, shuffle 1 uses default+1, and so on.
+//
+//  2. Visit every Value in a deterministic order.
+//
+//  3. Assign a random number to each Use in the Value's use-list in order.
+//
+//  4. If the numbers are already in order, reassign numbers until they aren't.
+//
+//  5. Sort the use-list using Value::sortUseList(), which is a stable sort.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/DenseSet.h"
+#include "llvm/AsmParser/Parser.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IR/UseListOrder.h"
+#include "llvm/IR/Verifier.h"
+#include "llvm/IRReader/IRReader.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/FileUtilities.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/Signals.h"
+#include "llvm/Support/SourceMgr.h"
+#include "llvm/Support/SystemUtils.h"
+#include <random>
+#include <vector>
+
+using namespace llvm;
+
+#define DEBUG_TYPE "use-list-order"
+
+static cl::opt<std::string> InputFilename(cl::Positional,
+                                          cl::desc("<input bitcode file>"),
+                                          cl::init("-"),
+                                          cl::value_desc("filename"));
+
+static cl::opt<bool> SaveTemps("save-temps", cl::desc("Save temp files"),
+                               cl::init(false));
+
+static cl::opt<unsigned>
+    NumShuffles("num-shuffles",
+                cl::desc("Number of times to shuffle and verify use-lists"),
+                cl::init(1));
+
+namespace {
+
+struct TempFile {
+  std::string Filename;
+  FileRemover Remover;
+  bool init(const std::string &Ext);
+  bool writeBitcode(const Module &M) const;
+  bool writeAssembly(const Module &M) const;
+  std::unique_ptr<Module> readBitcode(LLVMContext &Context) const;
+  std::unique_ptr<Module> readAssembly(LLVMContext &Context) const;
+};
+
+struct ValueMapping {
+  DenseMap<const Value *, unsigned> IDs;
+  std::vector<const Value *> Values;
+
+  /// \brief Construct a value mapping for module.
+  ///
+  /// Creates mapping from every value in \c M to an ID.  This mapping includes
+  /// un-referencable values.
+  ///
+  /// Every \a Value that gets serialized in some way should be represented
+  /// here.  The order needs to be deterministic, but it's unnecessary to match
+  /// the value-ids in the bitcode writer.
+  ///
+  /// All constants that are referenced by other values are included in the
+  /// mapping, but others -- which wouldn't be serialized -- are not.
+  ValueMapping(const Module &M);
+
+  /// \brief Map a value.
+  ///
+  /// Maps a value.  If it's a constant, maps all of its operands first.
+  void map(const Value *V);
+  unsigned lookup(const Value *V) const { return IDs.lookup(V); }
+};
+
+} // end namespace
+
+bool TempFile::init(const std::string &Ext) {
+  SmallVector<char, 64> Vector;
+  DEBUG(dbgs() << " - create-temp-file\n");
+  if (auto EC = sys::fs::createTemporaryFile("use-list-order", Ext, Vector)) {
+    (void)EC;
+    DEBUG(dbgs() << "error: " << EC.message() << "\n");
+    return true;
+  }
+  assert(!Vector.empty());
+
+  Filename.assign(Vector.data(), Vector.data() + Vector.size());
+  Remover.setFile(Filename, !SaveTemps);
+  DEBUG(dbgs() << " - filename = " << Filename << "\n");
+  return false;
+}
+
+bool TempFile::writeBitcode(const Module &M) const {
+  DEBUG(dbgs() << " - write bitcode\n");
+  std::error_code EC;
+  raw_fd_ostream OS(Filename, EC, sys::fs::F_None);
+  if (EC) {
+    DEBUG(dbgs() << "error: " << EC.message() << "\n");
+    return true;
+  }
+
+  WriteBitcodeToFile(&M, OS);
+  return false;
+}
+
+bool TempFile::writeAssembly(const Module &M) const {
+  DEBUG(dbgs() << " - write assembly\n");
+  std::error_code EC;
+  raw_fd_ostream OS(Filename, EC, sys::fs::F_Text);
+  if (EC) {
+    DEBUG(dbgs() << "error: " << EC.message() << "\n");
+    return true;
+  }
+
+  OS << M;
+  return false;
+}
+
+std::unique_ptr<Module> TempFile::readBitcode(LLVMContext &Context) const {
+  DEBUG(dbgs() << " - read bitcode\n");
+  ErrorOr<std::unique_ptr<MemoryBuffer>> BufferOr =
+      MemoryBuffer::getFile(Filename);
+  if (!BufferOr) {
+    DEBUG(dbgs() << "error: " << BufferOr.getError().message() << "\n");
+    return nullptr;
+  }
+
+  MemoryBuffer *Buffer = BufferOr.get().get();
+  ErrorOr<Module *> ModuleOr =
+      parseBitcodeFile(Buffer->getMemBufferRef(), Context);
+  if (!ModuleOr) {
+    DEBUG(dbgs() << "error: " << ModuleOr.getError().message() << "\n");
+    return nullptr;
+  }
+  return std::unique_ptr<Module>(ModuleOr.get());
+}
+
+std::unique_ptr<Module> TempFile::readAssembly(LLVMContext &Context) const {
+  DEBUG(dbgs() << " - read assembly\n");
+  SMDiagnostic Err;
+  std::unique_ptr<Module> M = parseAssemblyFile(Filename, Err, Context);
+  if (!M.get())
+    DEBUG(dbgs() << "error: "; Err.print("verify-use-list-order", dbgs()));
+  return M;
+}
+
+ValueMapping::ValueMapping(const Module &M) {
+  // Every value should be mapped, including things like void instructions and
+  // basic blocks that are kept out of the ValueEnumerator.
+  //
+  // The current mapping order makes it easier to debug the tables.  It happens
+  // to be similar to the ID mapping when writing ValueEnumerator, but they
+  // aren't (and needn't be) in sync.
+
+  // Globals.
+  for (const GlobalVariable &G : M.globals())
+    map(&G);
+  for (const GlobalAlias &A : M.aliases())
+    map(&A);
+  for (const Function &F : M)
+    map(&F);
+
+  // Constants used by globals.
+  for (const GlobalVariable &G : M.globals())
+    if (G.hasInitializer())
+      map(G.getInitializer());
+  for (const GlobalAlias &A : M.aliases())
+    map(A.getAliasee());
+  for (const Function &F : M) {
+    if (F.hasPrefixData())
+      map(F.getPrefixData());
+    if (F.hasPrologueData())
+      map(F.getPrologueData());
+  }
+
+  // Function bodies.
+  for (const Function &F : M) {
+    for (const Argument &A : F.args())
+      map(&A);
+    for (const BasicBlock &BB : F)
+      map(&BB);
+    for (const BasicBlock &BB : F)
+      for (const Instruction &I : BB)
+        map(&I);
+
+    // Constants used by instructions.
+    for (const BasicBlock &BB : F)
+      for (const Instruction &I : BB)
+        for (const Value *Op : I.operands())
+          if ((isa<Constant>(Op) && !isa<GlobalValue>(*Op)) ||
+              isa<InlineAsm>(Op))
+            map(Op);
+  }
+}
+
+void ValueMapping::map(const Value *V) {
+  if (IDs.lookup(V))
+    return;
+
+  if (auto *C = dyn_cast<Constant>(V))
+    if (!isa<GlobalValue>(C))
+      for (const Value *Op : C->operands())
+        map(Op);
+
+  Values.push_back(V);
+  IDs[V] = Values.size();
+}
+
+#ifndef NDEBUG
+static void dumpMapping(const ValueMapping &VM) {
+  dbgs() << "value-mapping (size = " << VM.Values.size() << "):\n";
+  for (unsigned I = 0, E = VM.Values.size(); I != E; ++I) {
+    dbgs() << " - id = " << I << ", value = ";
+    VM.Values[I]->dump();
+  }
+}
+
+static void debugValue(const ValueMapping &M, unsigned I, StringRef Desc) {
+  const Value *V = M.Values[I];
+  dbgs() << " - " << Desc << " value = ";
+  V->dump();
+  for (const Use &U : V->uses()) {
+    dbgs() << "   => use: op = " << U.getOperandNo()
+           << ", user-id = " << M.IDs.lookup(U.getUser()) << ", user = ";
+    U.getUser()->dump();
+  }
+}
+
+static void debugUserMismatch(const ValueMapping &L, const ValueMapping &R,
+                              unsigned I) {
+  dbgs() << " - fail: user mismatch: ID = " << I << "\n";
+  debugValue(L, I, "LHS");
+  debugValue(R, I, "RHS");
+
+  dbgs() << "\nlhs-";
+  dumpMapping(L);
+  dbgs() << "\nrhs-";
+  dumpMapping(R);
+}
+
+static void debugSizeMismatch(const ValueMapping &L, const ValueMapping &R) {
+  dbgs() << " - fail: map size: " << L.Values.size()
+         << " != " << R.Values.size() << "\n";
+  dbgs() << "\nlhs-";
+  dumpMapping(L);
+  dbgs() << "\nrhs-";
+  dumpMapping(R);
+}
+#endif
+
+static bool matches(const ValueMapping &LM, const ValueMapping &RM) {
+  DEBUG(dbgs() << "compare value maps\n");
+  if (LM.Values.size() != RM.Values.size()) {
+    DEBUG(debugSizeMismatch(LM, RM));
+    return false;
+  }
+
+  // This mapping doesn't include dangling constant users, since those don't
+  // get serialized.  However, checking if users are constant and calling
+  // isConstantUsed() on every one is very expensive.  Instead, just check if
+  // the user is mapped.
+  auto skipUnmappedUsers =
+      [&](Value::const_use_iterator &U, Value::const_use_iterator E,
+          const ValueMapping &M) {
+    while (U != E && !M.lookup(U->getUser()))
+      ++U;
+  };
+
+  // Iterate through all values, and check that both mappings have the same
+  // users.
+  for (unsigned I = 0, E = LM.Values.size(); I != E; ++I) {
+    const Value *L = LM.Values[I];
+    const Value *R = RM.Values[I];
+    auto LU = L->use_begin(), LE = L->use_end();
+    auto RU = R->use_begin(), RE = R->use_end();
+    skipUnmappedUsers(LU, LE, LM);
+    skipUnmappedUsers(RU, RE, RM);
+
+    while (LU != LE) {
+      if (RU == RE) {
+        DEBUG(debugUserMismatch(LM, RM, I));
+        return false;
+      }
+      if (LM.lookup(LU->getUser()) != RM.lookup(RU->getUser())) {
+        DEBUG(debugUserMismatch(LM, RM, I));
+        return false;
+      }
+      if (LU->getOperandNo() != RU->getOperandNo()) {
+        DEBUG(debugUserMismatch(LM, RM, I));
+        return false;
+      }
+      skipUnmappedUsers(++LU, LE, LM);
+      skipUnmappedUsers(++RU, RE, RM);
+    }
+    if (RU != RE) {
+      DEBUG(debugUserMismatch(LM, RM, I));
+      return false;
+    }
+  }
+
+  return true;
+}
+
+static void verifyAfterRoundTrip(const Module &M,
+                                 std::unique_ptr<Module> OtherM) {
+  if (!OtherM)
+    report_fatal_error("parsing failed");
+  if (verifyModule(*OtherM, &errs()))
+    report_fatal_error("verification failed");
+  if (!matches(ValueMapping(M), ValueMapping(*OtherM)))
+    report_fatal_error("use-list order changed");
+}
+static void verifyBitcodeUseListOrder(const Module &M) {
+  errs() << "*** verify-use-list-order: bitcode ***\n";
+  TempFile F;
+  if (F.init("bc"))
+    report_fatal_error("failed to initialize bitcode file");
+
+  if (F.writeBitcode(M))
+    report_fatal_error("failed to write bitcode");
+
+  LLVMContext Context;
+  verifyAfterRoundTrip(M, F.readBitcode(Context));
+}
+
+static void verifyAssemblyUseListOrder(const Module &M) {
+  errs() << "*** verify-use-list-order: assembly ***\n";
+  TempFile F;
+  if (F.init("ll"))
+    report_fatal_error("failed to initialize assembly file");
+
+  if (F.writeAssembly(M))
+    report_fatal_error("failed to write assembly");
+
+  LLVMContext Context;
+  verifyAfterRoundTrip(M, F.readAssembly(Context));
+}
+
+static void verifyUseListOrder(const Module &M) {
+  verifyBitcodeUseListOrder(M);
+  verifyAssemblyUseListOrder(M);
+}
+
+static void shuffleValueUseLists(Value *V, std::minstd_rand0 &Gen,
+                                 DenseSet<Value *> &Seen) {
+  if (!Seen.insert(V).second)
+    return;
+
+  if (auto *C = dyn_cast<Constant>(V))
+    if (!isa<GlobalValue>(C))
+      for (Value *Op : C->operands())
+        shuffleValueUseLists(Op, Gen, Seen);
+
+  if (V->use_empty() || std::next(V->use_begin()) == V->use_end())
+    // Nothing to shuffle for 0 or 1 users.
+    return;
+
+  // Generate random numbers between 10 and 99, which will line up nicely in
+  // debug output.  We're not worried about collisons here.
+  DEBUG(dbgs() << "V = "; V->dump());
+  std::uniform_int_distribution<short> Dist(10, 99);
+  SmallDenseMap<const Use *, short, 16> Order;
+  auto compareUses =
+      [&Order](const Use &L, const Use &R) { return Order[&L] < Order[&R]; };
+  do {
+    for (const Use &U : V->uses()) {
+      auto I = Dist(Gen);
+      Order[&U] = I;
+      DEBUG(dbgs() << " - order: " << I << ", op = " << U.getOperandNo()
+                   << ", U = ";
+            U.getUser()->dump());
+    }
+  } while (std::is_sorted(V->use_begin(), V->use_end(), compareUses));
+
+  DEBUG(dbgs() << " => shuffle\n");
+  V->sortUseList(compareUses);
+
+  DEBUG({
+    for (const Use &U : V->uses()) {
+      dbgs() << " - order: " << Order.lookup(&U)
+             << ", op = " << U.getOperandNo() << ", U = ";
+      U.getUser()->dump();
+    }
+  });
+}
+
+static void reverseValueUseLists(Value *V, DenseSet<Value *> &Seen) {
+  if (!Seen.insert(V).second)
+    return;
+
+  if (auto *C = dyn_cast<Constant>(V))
+    if (!isa<GlobalValue>(C))
+      for (Value *Op : C->operands())
+        reverseValueUseLists(Op, Seen);
+
+  if (V->use_empty() || std::next(V->use_begin()) == V->use_end())
+    // Nothing to shuffle for 0 or 1 users.
+    return;
+
+  DEBUG({
+    dbgs() << "V = ";
+    V->dump();
+    for (const Use &U : V->uses()) {
+      dbgs() << " - order: op = " << U.getOperandNo() << ", U = ";
+      U.getUser()->dump();
+    }
+    dbgs() << " => reverse\n";
+  });
+
+  V->reverseUseList();
+
+  DEBUG({
+    for (const Use &U : V->uses()) {
+      dbgs() << " - order: op = " << U.getOperandNo() << ", U = ";
+      U.getUser()->dump();
+    }
+  });
+}
+
+template <class Changer>
+static void changeUseLists(Module &M, Changer changeValueUseList) {
+  // Visit every value that would be serialized to an IR file.
+  //
+  // Globals.
+  for (GlobalVariable &G : M.globals())
+    changeValueUseList(&G);
+  for (GlobalAlias &A : M.aliases())
+    changeValueUseList(&A);
+  for (Function &F : M)
+    changeValueUseList(&F);
+
+  // Constants used by globals.
+  for (GlobalVariable &G : M.globals())
+    if (G.hasInitializer())
+      changeValueUseList(G.getInitializer());
+  for (GlobalAlias &A : M.aliases())
+    changeValueUseList(A.getAliasee());
+  for (Function &F : M) {
+    if (F.hasPrefixData())
+      changeValueUseList(F.getPrefixData());
+    if (F.hasPrologueData())
+      changeValueUseList(F.getPrologueData());
+  }
+
+  // Function bodies.
+  for (Function &F : M) {
+    for (Argument &A : F.args())
+      changeValueUseList(&A);
+    for (BasicBlock &BB : F)
+      changeValueUseList(&BB);
+    for (BasicBlock &BB : F)
+      for (Instruction &I : BB)
+        changeValueUseList(&I);
+
+    // Constants used by instructions.
+    for (BasicBlock &BB : F)
+      for (Instruction &I : BB)
+        for (Value *Op : I.operands())
+          if ((isa<Constant>(Op) && !isa<GlobalValue>(*Op)) ||
+              isa<InlineAsm>(Op))
+            changeValueUseList(Op);
+  }
+
+  if (verifyModule(M, &errs()))
+    report_fatal_error("verification failed");
+}
+
+static void shuffleUseLists(Module &M, unsigned SeedOffset) {
+  errs() << "*** shuffle-use-lists ***\n";
+  std::minstd_rand0 Gen(std::minstd_rand0::default_seed + SeedOffset);
+  DenseSet<Value *> Seen;
+  changeUseLists(M, [&](Value *V) { shuffleValueUseLists(V, Gen, Seen); });
+  DEBUG(dbgs() << "\n");
+}
+
+static void reverseUseLists(Module &M) {
+  errs() << "*** reverse-use-lists ***\n";
+  DenseSet<Value *> Seen;
+  changeUseLists(M, [&](Value *V) { reverseValueUseLists(V, Seen); });
+  DEBUG(dbgs() << "\n");
+}
+
+int main(int argc, char **argv) {
+  sys::PrintStackTraceOnErrorSignal();
+  llvm::PrettyStackTraceProgram X(argc, argv);
+
+  // Enable debug stream buffering.
+  EnableDebugBuffering = true;
+
+  llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
+  LLVMContext &Context = getGlobalContext();
+
+  cl::ParseCommandLineOptions(argc, argv,
+                              "llvm tool to verify use-list order\n");
+
+  SMDiagnostic Err;
+
+  // Load the input module...
+  std::unique_ptr<Module> M = parseIRFile(InputFilename, Err, Context);
+
+  if (!M.get()) {
+    Err.print(argv[0], errs());
+    return 1;
+  }
+  if (verifyModule(*M, &errs()))
+    report_fatal_error("verification failed");
+
+  errs() << "*** verify-use-list-order ***\n";
+  // Can't verify if order isn't preserved.
+  if (!shouldPreserveBitcodeUseListOrder()) {
+    errs() << "warning: forcing -preserve-bc-use-list-order\n";
+    setPreserveBitcodeUseListOrder(true);
+  }
+  if (!shouldPreserveAssemblyUseListOrder()) {
+    errs() << "warning: forcing -preserve-ll-use-list-order\n";
+    setPreserveAssemblyUseListOrder(true);
+  }
+
+  // Verify the use lists now and after reversing them.
+  verifyUseListOrder(*M);
+  reverseUseLists(*M);
+  verifyUseListOrder(*M);
+
+  for (unsigned I = 0, E = NumShuffles; I != E; ++I) {
+    errs() << "*** shuffle iteration: " << I + 1 << " of " << E << " ***\n";
+
+    // Shuffle with a different (deterministic) seed each time.
+    shuffleUseLists(*M, I);
+
+    // Verify again before and after reversing.
+    verifyUseListOrder(*M);
+    reverseUseLists(*M);
+    verifyUseListOrder(*M);
+  }
+
+  return 0;
+}
diff --git a/tools/yaml2obj/CMakeLists.txt b/tools/yaml2obj/CMakeLists.txt
index 78e92a0680fe..52e9df4d766a 100644
--- a/tools/yaml2obj/CMakeLists.txt
+++ b/tools/yaml2obj/CMakeLists.txt
@@ -4,7 +4,7 @@ set(LLVM_LINK_COMPONENTS
   Support
   )
 
-add_llvm_utility(yaml2obj
+add_llvm_tool(yaml2obj
   yaml2obj.cpp
   yaml2coff.cpp
   yaml2elf.cpp
diff --git a/tools/yaml2obj/Makefile b/tools/yaml2obj/Makefile
index 88017954087a..912f0e31ae7c 100644
--- a/tools/yaml2obj/Makefile
+++ b/tools/yaml2obj/Makefile
@@ -14,7 +14,4 @@ LINK_COMPONENTS := object
 # This tool has no plugins, optimize startup time.
 TOOL_NO_EXPORTS = 1
 
-# Don't install this utility
-NO_INSTALL = 1
-
 include $(LEVEL)/Makefile.common
diff --git a/tools/yaml2obj/yaml2coff.cpp b/tools/yaml2obj/yaml2coff.cpp
index c772db9a8e80..8322b2ff0a0d 100644
--- a/tools/yaml2obj/yaml2coff.cpp
+++ b/tools/yaml2obj/yaml2coff.cpp
@@ -13,11 +13,12 @@
 //===----------------------------------------------------------------------===//
 
 #include "yaml2obj.h"
-#include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/StringSwitch.h"
+#include "llvm/Object/COFF.h"
 #include "llvm/Object/COFFYAML.h"
 #include "llvm/Support/Endian.h"
 #include "llvm/Support/MemoryBuffer.h"
@@ -30,12 +31,35 @@ using namespace llvm;
 /// This parses a yaml stream that represents a COFF object file.
 /// See docs/yaml2obj for the yaml scheema.
 struct COFFParser {
-  COFFParser(COFFYAML::Object &Obj) : Obj(Obj) {
+  COFFParser(COFFYAML::Object &Obj)
+      : Obj(Obj), SectionTableStart(0), SectionTableSize(0) {
     // A COFF string table always starts with a 4 byte size field. Offsets into
     // it include this size, so allocate it now.
     StringTable.append(4, char(0));
   }
 
+  bool useBigObj() const {
+    return static_cast<int32_t>(Obj.Sections.size()) >
+           COFF::MaxNumberOfSections16;
+  }
+
+  bool isPE() const { return Obj.OptionalHeader.hasValue(); }
+  bool is64Bit() const {
+    return Obj.Header.Machine == COFF::IMAGE_FILE_MACHINE_AMD64;
+  }
+
+  uint32_t getFileAlignment() const {
+    return Obj.OptionalHeader->Header.FileAlignment;
+  }
+
+  unsigned getHeaderSize() const {
+    return useBigObj() ? COFF::Header32Size : COFF::Header16Size;
+  }
+
+  unsigned getSymbolSize() const {
+    return useBigObj() ? COFF::Symbol32Size : COFF::Symbol16Size;
+  }
+
   bool parseSections() {
     for (std::vector<COFFYAML::Section>::iterator i = Obj.Sections.begin(),
            e = Obj.Sections.end(); i != e; ++i) {
@@ -111,39 +135,61 @@ struct COFFParser {
 
   StringMap<unsigned> StringTableMap;
   std::string StringTable;
+  uint32_t SectionTableStart;
+  uint32_t SectionTableSize;
 };
 
 // Take a CP and assign addresses and sizes to everything. Returns false if the
 // layout is not valid to do.
-static bool layoutCOFF(COFFParser &CP) {
-  uint32_t SectionTableStart = 0;
-  uint32_t SectionTableSize  = 0;
+static bool layoutOptionalHeader(COFFParser &CP) {
+  if (!CP.isPE())
+    return true;
+  unsigned PEHeaderSize = CP.is64Bit() ? sizeof(object::pe32plus_header)
+                                       : sizeof(object::pe32_header);
+  CP.Obj.Header.SizeOfOptionalHeader =
+      PEHeaderSize +
+      sizeof(object::data_directory) * (COFF::NUM_DATA_DIRECTORIES + 1);
+  return true;
+}
+
+namespace {
+enum { DOSStubSize = 128 };
+}
 
+// Take a CP and assign addresses and sizes to everything. Returns false if the
+// layout is not valid to do.
+static bool layoutCOFF(COFFParser &CP) {
   // The section table starts immediately after the header, including the
   // optional header.
-  SectionTableStart = sizeof(COFF::header) + CP.Obj.Header.SizeOfOptionalHeader;
-  SectionTableSize = sizeof(COFF::section) * CP.Obj.Sections.size();
+  CP.SectionTableStart =
+      CP.getHeaderSize() + CP.Obj.Header.SizeOfOptionalHeader;
+  if (CP.isPE())
+    CP.SectionTableStart += DOSStubSize + sizeof(COFF::PEMagic);
+  CP.SectionTableSize = COFF::SectionSize * CP.Obj.Sections.size();
 
-  uint32_t CurrentSectionDataOffset = SectionTableStart + SectionTableSize;
+  uint32_t CurrentSectionDataOffset =
+      CP.SectionTableStart + CP.SectionTableSize;
 
   // Assign each section data address consecutively.
-  for (std::vector<COFFYAML::Section>::iterator i = CP.Obj.Sections.begin(),
-                                                e = CP.Obj.Sections.end();
-                                                i != e; ++i) {
-    if (i->SectionData.binary_size() > 0) {
-      i->Header.SizeOfRawData = i->SectionData.binary_size();
-      i->Header.PointerToRawData = CurrentSectionDataOffset;
-      CurrentSectionDataOffset += i->Header.SizeOfRawData;
-      if (!i->Relocations.empty()) {
-        i->Header.PointerToRelocations = CurrentSectionDataOffset;
-        i->Header.NumberOfRelocations = i->Relocations.size();
-        CurrentSectionDataOffset += i->Header.NumberOfRelocations *
-          COFF::RelocationSize;
+  for (COFFYAML::Section &S : CP.Obj.Sections) {
+    if (S.SectionData.binary_size() > 0) {
+      CurrentSectionDataOffset = RoundUpToAlignment(
+          CurrentSectionDataOffset, CP.isPE() ? CP.getFileAlignment() : 4);
+      S.Header.SizeOfRawData = S.SectionData.binary_size();
+      if (CP.isPE())
+        S.Header.SizeOfRawData =
+            RoundUpToAlignment(S.Header.SizeOfRawData, CP.getFileAlignment());
+      S.Header.PointerToRawData = CurrentSectionDataOffset;
+      CurrentSectionDataOffset += S.Header.SizeOfRawData;
+      if (!S.Relocations.empty()) {
+        S.Header.PointerToRelocations = CurrentSectionDataOffset;
+        S.Header.NumberOfRelocations = S.Relocations.size();
+        CurrentSectionDataOffset +=
+            S.Header.NumberOfRelocations * COFF::RelocationSize;
       }
-      // TODO: Handle alignment.
     } else {
-      i->Header.SizeOfRawData = 0;
-      i->Header.PointerToRawData = 0;
+      S.Header.SizeOfRawData = 0;
+      S.Header.PointerToRawData = 0;
     }
   }
 
@@ -163,7 +209,7 @@ static bool layoutCOFF(COFFParser &CP) {
       NumberOfAuxSymbols += 1;
     if (!i->File.empty())
       NumberOfAuxSymbols +=
-          (i->File.size() + COFF::SymbolSize - 1) / COFF::SymbolSize;
+          (i->File.size() + CP.getSymbolSize() - 1) / CP.getSymbolSize();
     if (i->SectionDefinition)
       NumberOfAuxSymbols += 1;
     if (i->CLRToken)
@@ -175,7 +221,10 @@ static bool layoutCOFF(COFFParser &CP) {
   // Store all the allocated start addresses in the header.
   CP.Obj.Header.NumberOfSections = CP.Obj.Sections.size();
   CP.Obj.Header.NumberOfSymbols = NumberOfSymbols;
-  CP.Obj.Header.PointerToSymbolTable = SymbolTableStart;
+  if (NumberOfSymbols > 0 || CP.StringTable.size() > 4)
+    CP.Obj.Header.PointerToSymbolTable = SymbolTableStart;
+  else
+    CP.Obj.Header.PointerToSymbolTable = 0;
 
   *reinterpret_cast<support::ulittle32_t *>(&CP.StringTable[0])
     = CP.StringTable.size();
@@ -222,15 +271,153 @@ zeros_impl<sizeof(T)> zeros(const T &) {
   return zeros_impl<sizeof(T)>();
 }
 
-bool writeCOFF(COFFParser &CP, raw_ostream &OS) {
-  OS << binary_le(CP.Obj.Header.Machine)
-     << binary_le(CP.Obj.Header.NumberOfSections)
-     << binary_le(CP.Obj.Header.TimeDateStamp)
-     << binary_le(CP.Obj.Header.PointerToSymbolTable)
-     << binary_le(CP.Obj.Header.NumberOfSymbols)
-     << binary_le(CP.Obj.Header.SizeOfOptionalHeader)
-     << binary_le(CP.Obj.Header.Characteristics);
+struct num_zeros_impl {
+  size_t N;
+  num_zeros_impl(size_t N) : N(N) {}
+};
+
+raw_ostream &operator<<(raw_ostream &OS, const num_zeros_impl &NZI) {
+  for (size_t I = 0; I != NZI.N; ++I)
+    OS.write(0);
+  return OS;
+}
+
+num_zeros_impl num_zeros(size_t N) {
+  num_zeros_impl NZI(N);
+  return NZI;
+}
+
+template <typename T>
+static uint32_t initializeOptionalHeader(COFFParser &CP, uint16_t Magic, T Header) {
+  memset(Header, 0, sizeof(*Header));
+  Header->Magic = Magic;
+  Header->SectionAlignment = CP.Obj.OptionalHeader->Header.SectionAlignment;
+  Header->FileAlignment = CP.Obj.OptionalHeader->Header.FileAlignment;
+  uint32_t SizeOfCode = 0, SizeOfInitializedData = 0,
+           SizeOfUninitializedData = 0;
+  uint32_t SizeOfHeaders = RoundUpToAlignment(
+      CP.SectionTableStart + CP.SectionTableSize, Header->FileAlignment);
+  uint32_t SizeOfImage =
+      RoundUpToAlignment(SizeOfHeaders, Header->SectionAlignment);
+  uint32_t BaseOfData = 0;
+  for (const COFFYAML::Section &S : CP.Obj.Sections) {
+    if (S.Header.Characteristics & COFF::IMAGE_SCN_CNT_CODE)
+      SizeOfCode += S.Header.SizeOfRawData;
+    if (S.Header.Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA)
+      SizeOfInitializedData += S.Header.SizeOfRawData;
+    if (S.Header.Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA)
+      SizeOfUninitializedData += S.Header.SizeOfRawData;
+    if (S.Name.equals(".text"))
+      Header->BaseOfCode = S.Header.VirtualAddress; // RVA
+    else if (S.Name.equals(".data"))
+      BaseOfData = S.Header.VirtualAddress; // RVA
+    if (S.Header.VirtualAddress)
+      SizeOfImage +=
+          RoundUpToAlignment(S.Header.VirtualSize, Header->SectionAlignment);
+  }
+  Header->SizeOfCode = SizeOfCode;
+  Header->SizeOfInitializedData = SizeOfInitializedData;
+  Header->SizeOfUninitializedData = SizeOfUninitializedData;
+  Header->AddressOfEntryPoint =
+      CP.Obj.OptionalHeader->Header.AddressOfEntryPoint; // RVA
+  Header->ImageBase = CP.Obj.OptionalHeader->Header.ImageBase;
+  Header->MajorOperatingSystemVersion =
+      CP.Obj.OptionalHeader->Header.MajorOperatingSystemVersion;
+  Header->MinorOperatingSystemVersion =
+      CP.Obj.OptionalHeader->Header.MinorOperatingSystemVersion;
+  Header->MajorImageVersion =
+      CP.Obj.OptionalHeader->Header.MajorImageVersion;
+  Header->MinorImageVersion =
+      CP.Obj.OptionalHeader->Header.MinorImageVersion;
+  Header->MajorSubsystemVersion =
+      CP.Obj.OptionalHeader->Header.MajorSubsystemVersion;
+  Header->MinorSubsystemVersion =
+      CP.Obj.OptionalHeader->Header.MinorSubsystemVersion;
+  Header->SizeOfImage = SizeOfImage;
+  Header->SizeOfHeaders = SizeOfHeaders;
+  Header->Subsystem = CP.Obj.OptionalHeader->Header.Subsystem;
+  Header->DLLCharacteristics = CP.Obj.OptionalHeader->Header.DLLCharacteristics;
+  Header->SizeOfStackReserve = CP.Obj.OptionalHeader->Header.SizeOfStackReserve;
+  Header->SizeOfStackCommit = CP.Obj.OptionalHeader->Header.SizeOfStackCommit;
+  Header->SizeOfHeapReserve = CP.Obj.OptionalHeader->Header.SizeOfHeapReserve;
+  Header->SizeOfHeapCommit = CP.Obj.OptionalHeader->Header.SizeOfHeapCommit;
+  Header->NumberOfRvaAndSize = COFF::NUM_DATA_DIRECTORIES + 1;
+  return BaseOfData;
+}
+
+static bool writeCOFF(COFFParser &CP, raw_ostream &OS) {
+  if (CP.isPE()) {
+    // PE files start with a DOS stub.
+    object::dos_header DH;
+    memset(&DH, 0, sizeof(DH));
+
+    // DOS EXEs start with "MZ" magic.
+    DH.Magic[0] = 'M';
+    DH.Magic[1] = 'Z';
+    // Initializing the AddressOfRelocationTable is strictly optional but
+    // mollifies certain tools which expect it to have a value greater than
+    // 0x40.
+    DH.AddressOfRelocationTable = sizeof(DH);
+    // This is the address of the PE signature.
+    DH.AddressOfNewExeHeader = DOSStubSize;
+
+    // Write out our DOS stub.
+    OS.write(reinterpret_cast<char *>(&DH), sizeof(DH));
+    // Write padding until we reach the position of where our PE signature
+    // should live.
+    OS << num_zeros(DOSStubSize - sizeof(DH));
+    // Write out the PE signature.
+    OS.write(COFF::PEMagic, sizeof(COFF::PEMagic));
+  }
+  if (CP.useBigObj()) {
+    OS << binary_le(static_cast<uint16_t>(COFF::IMAGE_FILE_MACHINE_UNKNOWN))
+       << binary_le(static_cast<uint16_t>(0xffff))
+       << binary_le(static_cast<uint16_t>(COFF::BigObjHeader::MinBigObjectVersion))
+       << binary_le(CP.Obj.Header.Machine)
+       << binary_le(CP.Obj.Header.TimeDateStamp);
+    OS.write(COFF::BigObjMagic, sizeof(COFF::BigObjMagic));
+    OS << zeros(uint32_t(0))
+       << zeros(uint32_t(0))
+       << zeros(uint32_t(0))
+       << zeros(uint32_t(0))
+       << binary_le(CP.Obj.Header.NumberOfSections)
+       << binary_le(CP.Obj.Header.PointerToSymbolTable)
+       << binary_le(CP.Obj.Header.NumberOfSymbols);
+  } else {
+    OS << binary_le(CP.Obj.Header.Machine)
+       << binary_le(static_cast<int16_t>(CP.Obj.Header.NumberOfSections))
+       << binary_le(CP.Obj.Header.TimeDateStamp)
+       << binary_le(CP.Obj.Header.PointerToSymbolTable)
+       << binary_le(CP.Obj.Header.NumberOfSymbols)
+       << binary_le(CP.Obj.Header.SizeOfOptionalHeader)
+       << binary_le(CP.Obj.Header.Characteristics);
+  }
+  if (CP.isPE()) {
+    if (CP.is64Bit()) {
+      object::pe32plus_header PEH;
+      initializeOptionalHeader(CP, COFF::PE32Header::PE32_PLUS, &PEH);
+      OS.write(reinterpret_cast<char *>(&PEH), sizeof(PEH));
+    } else {
+      object::pe32_header PEH;
+      uint32_t BaseOfData = initializeOptionalHeader(CP, COFF::PE32Header::PE32, &PEH);
+      PEH.BaseOfData = BaseOfData;
+      OS.write(reinterpret_cast<char *>(&PEH), sizeof(PEH));
+    }
+    for (const Optional<COFF::DataDirectory> &DD :
+         CP.Obj.OptionalHeader->DataDirectories) {
+      if (!DD.hasValue()) {
+        OS << zeros(uint32_t(0));
+        OS << zeros(uint32_t(0));
+      } else {
+        OS << binary_le(DD->RelativeVirtualAddress);
+        OS << binary_le(DD->Size);
+      }
+    }
+    OS << zeros(uint32_t(0));
+    OS << zeros(uint32_t(0));
+  }
 
+  assert(OS.tell() == CP.SectionTableStart);
   // Output section table.
   for (std::vector<COFFYAML::Section>::iterator i = CP.Obj.Sections.begin(),
                                                 e = CP.Obj.Sections.end();
@@ -246,6 +433,7 @@ bool writeCOFF(COFFParser &CP, raw_ostream &OS) {
        << binary_le(i->Header.NumberOfLineNumbers)
        << binary_le(i->Header.Characteristics);
   }
+  assert(OS.tell() == CP.SectionTableStart + CP.SectionTableSize);
 
   unsigned CurSymbol = 0;
   StringMap<unsigned> SymbolTableIndexMap;
@@ -257,12 +445,15 @@ bool writeCOFF(COFFParser &CP, raw_ostream &OS) {
   }
 
   // Output section data.
-  for (std::vector<COFFYAML::Section>::iterator i = CP.Obj.Sections.begin(),
-                                                e = CP.Obj.Sections.end();
-                                                i != e; ++i) {
-    i->SectionData.writeAsBinary(OS);
-    for (unsigned I2 = 0, E2 = i->Relocations.size(); I2 != E2; ++I2) {
-      const COFFYAML::Relocation &R = i->Relocations[I2];
+  for (const COFFYAML::Section &S : CP.Obj.Sections) {
+    if (!S.Header.SizeOfRawData)
+      continue;
+    assert(S.Header.PointerToRawData >= OS.tell());
+    OS << num_zeros(S.Header.PointerToRawData - OS.tell());
+    S.SectionData.writeAsBinary(OS);
+    assert(S.Header.SizeOfRawData >= S.SectionData.binary_size());
+    OS << num_zeros(S.Header.SizeOfRawData - S.SectionData.binary_size());
+    for (const COFFYAML::Relocation &R : S.Relocations) {
       uint32_t SymbolTableIndex = SymbolTableIndexMap[R.SymbolName];
       OS << binary_le(R.VirtualAddress)
          << binary_le(SymbolTableIndex)
@@ -276,9 +467,12 @@ bool writeCOFF(COFFParser &CP, raw_ostream &OS) {
                                                      e = CP.Obj.Symbols.end();
                                                      i != e; ++i) {
     OS.write(i->Header.Name, COFF::NameSize);
-    OS << binary_le(i->Header.Value)
-       << binary_le(i->Header.SectionNumber)
-       << binary_le(i->Header.Type)
+    OS << binary_le(i->Header.Value);
+    if (CP.useBigObj())
+       OS << binary_le(i->Header.SectionNumber);
+    else
+       OS << binary_le(static_cast<int16_t>(i->Header.SectionNumber));
+    OS << binary_le(i->Header.Type)
        << binary_le(i->Header.StorageClass)
        << binary_le(i->Header.NumberOfAuxSymbols);
 
@@ -287,43 +481,50 @@ bool writeCOFF(COFFParser &CP, raw_ostream &OS) {
          << binary_le(i->FunctionDefinition->TotalSize)
          << binary_le(i->FunctionDefinition->PointerToLinenumber)
          << binary_le(i->FunctionDefinition->PointerToNextFunction)
-         << zeros(i->FunctionDefinition->unused);
+         << zeros(i->FunctionDefinition->unused)
+         << num_zeros(CP.getSymbolSize() - COFF::Symbol16Size);
     if (i->bfAndefSymbol)
       OS << zeros(i->bfAndefSymbol->unused1)
          << binary_le(i->bfAndefSymbol->Linenumber)
          << zeros(i->bfAndefSymbol->unused2)
          << binary_le(i->bfAndefSymbol->PointerToNextFunction)
-         << zeros(i->bfAndefSymbol->unused3);
+         << zeros(i->bfAndefSymbol->unused3)
+         << num_zeros(CP.getSymbolSize() - COFF::Symbol16Size);
     if (i->WeakExternal)
       OS << binary_le(i->WeakExternal->TagIndex)
          << binary_le(i->WeakExternal->Characteristics)
-         << zeros(i->WeakExternal->unused);
+         << zeros(i->WeakExternal->unused)
+         << num_zeros(CP.getSymbolSize() - COFF::Symbol16Size);
     if (!i->File.empty()) {
+      unsigned SymbolSize = CP.getSymbolSize();
       uint32_t NumberOfAuxRecords =
-          (i->File.size() + COFF::SymbolSize - 1) / COFF::SymbolSize;
-      uint32_t NumberOfAuxBytes = NumberOfAuxRecords * COFF::SymbolSize;
+          (i->File.size() + SymbolSize - 1) / SymbolSize;
+      uint32_t NumberOfAuxBytes = NumberOfAuxRecords * SymbolSize;
       uint32_t NumZeros = NumberOfAuxBytes - i->File.size();
       OS.write(i->File.data(), i->File.size());
-      for (uint32_t Padding = 0; Padding < NumZeros; ++Padding)
-        OS.write(0);
+      OS << num_zeros(NumZeros);
     }
     if (i->SectionDefinition)
       OS << binary_le(i->SectionDefinition->Length)
          << binary_le(i->SectionDefinition->NumberOfRelocations)
          << binary_le(i->SectionDefinition->NumberOfLinenumbers)
          << binary_le(i->SectionDefinition->CheckSum)
-         << binary_le(i->SectionDefinition->Number)
+         << binary_le(static_cast<int16_t>(i->SectionDefinition->Number))
          << binary_le(i->SectionDefinition->Selection)
-         << zeros(i->SectionDefinition->unused);
+         << zeros(i->SectionDefinition->unused)
+         << binary_le(static_cast<int16_t>(i->SectionDefinition->Number >> 16))
+         << num_zeros(CP.getSymbolSize() - COFF::Symbol16Size);
     if (i->CLRToken)
       OS << binary_le(i->CLRToken->AuxType)
          << zeros(i->CLRToken->unused1)
          << binary_le(i->CLRToken->SymbolTableIndex)
-         << zeros(i->CLRToken->unused2);
+         << zeros(i->CLRToken->unused2)
+         << num_zeros(CP.getSymbolSize() - COFF::Symbol16Size);
   }
 
   // Output string table.
-  OS.write(&CP.StringTable[0], CP.StringTable.size());
+  if (CP.Obj.Header.PointerToSymbolTable)
+    OS.write(&CP.StringTable[0], CP.StringTable.size());
   return true;
 }
 
@@ -341,6 +542,10 @@ int yaml2coff(yaml::Input &YIn, raw_ostream &Out) {
     return 1;
   }
 
+  if (!layoutOptionalHeader(CP)) {
+    errs() << "yaml2obj: Failed to layout optional header for COFF file!\n";
+    return 1;
+  }
   if (!layoutCOFF(CP)) {
     errs() << "yaml2obj: Failed to layout COFF file!\n";
     return 1;
diff --git a/tools/yaml2obj/yaml2elf.cpp b/tools/yaml2obj/yaml2elf.cpp
index 6eeecaedcabd..44c8c12da89d 100644
--- a/tools/yaml2obj/yaml2elf.cpp
+++ b/tools/yaml2obj/yaml2elf.cpp
@@ -62,11 +62,7 @@ class NameToIdxMap {
 public:
   /// \returns true if name is already present in the map.
   bool addName(StringRef Name, unsigned i) {
-    StringMapEntry<int> &Entry = Map.GetOrCreateValue(Name, -1);
-    if (Entry.getValue() != -1)
-      return true;
-    Entry.setValue((int)i);
-    return false;
+    return !Map.insert(std::make_pair(Name, (int)i)).second;
   }
   /// \returns true if name is not present in the map
   bool lookup(StringRef Name, unsigned &Idx) const {
@@ -190,7 +186,7 @@ bool ELFState<ELFT>::initSectionHeaders(std::vector<Elf_Shdr> &SHeaders,
 
   for (const auto &Sec : Doc.Sections)
     DotShStrtab.add(Sec->Name);
-  DotShStrtab.finalize();
+  DotShStrtab.finalize(StringTableBuilder::ELF);
 
   for (const auto &Sec : Doc.Sections) {
     zero(SHeader);
@@ -261,7 +257,7 @@ void ELFState<ELFT>::initSymtabSectionHeader(Elf_Shdr &SHeader,
     DotStrtab.add(Sym.Name);
   for (const auto &Sym : Doc.Symbols.Weak)
     DotStrtab.add(Sym.Name);
-  DotStrtab.finalize();
+  DotStrtab.finalize(StringTableBuilder::ELF);
 
   addSymbols(Doc.Symbols.Local, Syms, ELF::STB_LOCAL);
   addSymbols(Doc.Symbols.Global, Syms, ELF::STB_GLOBAL);
@@ -304,7 +300,7 @@ void ELFState<ELFT>::addSymbols(const std::vector<ELFYAML::Symbol> &Symbols,
       Symbol.st_shndx = Index;
     } // else Symbol.st_shndex == SHN_UNDEF (== 0), since it was zero'd earlier.
     Symbol.st_value = Sym.Value;
-    Symbol.st_other = Sym.Visibility;
+    Symbol.st_other = Sym.Other;
     Symbol.st_size = Sym.Size;
     Syms.push_back(Symbol);
   }
diff --git a/tools/yaml2obj/yaml2obj.cpp b/tools/yaml2obj/yaml2obj.cpp
index 945fad1384aa..375cd89849c3 100644
--- a/tools/yaml2obj/yaml2obj.cpp
+++ b/tools/yaml2obj/yaml2obj.cpp
@@ -83,11 +83,11 @@ int main(int argc, char **argv) {
   if (OutputFilename.empty())
     OutputFilename = "-";
 
-  std::string ErrorInfo;
+  std::error_code EC;
   std::unique_ptr<tool_output_file> Out(
-      new tool_output_file(OutputFilename.c_str(), ErrorInfo, sys::fs::F_None));
-  if (!ErrorInfo.empty()) {
-    errs() << ErrorInfo << '\n';
+      new tool_output_file(OutputFilename, EC, sys::fs::F_None));
+  if (EC) {
+    errs() << EC.message() << '\n';
     return 1;
   }
 
diff --git a/tools/yaml2obj/yaml2obj.h b/tools/yaml2obj/yaml2obj.h
index 086f6413aa78..7290a9af2c64 100644
--- a/tools/yaml2obj/yaml2obj.h
+++ b/tools/yaml2obj/yaml2obj.h
@@ -9,8 +9,8 @@
 /// \file
 /// \brief Common declarations for yaml2obj
 //===----------------------------------------------------------------------===//
-#ifndef LLVM_TOOLS_YAML2OBJ_H
-#define LLVM_TOOLS_YAML2OBJ_H
+#ifndef LLVM_TOOLS_YAML2OBJ_YAML2OBJ_H
+#define LLVM_TOOLS_YAML2OBJ_YAML2OBJ_H
 
 namespace llvm {
 class raw_ostream;