Vendor import of llvm trunk r161861:vendor/llvm/llvm-trunk-r161861

http://llvm.org/svn/llvm-project/llvm/trunk@161861

43 files changed, 778 insertions, 1318 deletions

diff --git a/tools/CMakeLists.txt b/tools/CMakeLists.txt
index 9668c764c689..1bfc2fe3e868 100644
--- a/tools/CMakeLists.txt
+++ b/tools/CMakeLists.txt
@@ -2,14 +2,6 @@
 # three small executables. This is done to minimize memory load in parallel
 # builds.  Please retain this ordering.
 
-# If polly exists and is not disabled compile it and add it to the LLVM tools.
-option(LLVM_BUILD_POLLY "Compile polly" ON)
-if( EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/polly/CMakeLists.txt )
-  if (LLVM_BUILD_POLLY)
-    add_subdirectory( ${CMAKE_CURRENT_SOURCE_DIR}/polly)
-  endif (LLVM_BUILD_POLLY)
-endif( EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/polly/CMakeLists.txt )
-
 if( NOT WIN32 OR MSYS OR CYGWIN )
   # We currently require 'sed' to build llvm-config, so don't try to build it
   # on pure Win32.
@@ -27,7 +19,6 @@ add_subdirectory(llvm-ar)
 add_subdirectory(llvm-nm)
 add_subdirectory(llvm-size)
 
-add_subdirectory(llvm-ld)
 add_subdirectory(llvm-cov)
 add_subdirectory(llvm-prof)
 add_subdirectory(llvm-link)
@@ -44,7 +35,6 @@ add_subdirectory(llvm-dwarfdump)
 add_subdirectory(bugpoint)
 add_subdirectory(bugpoint-passes)
 add_subdirectory(llvm-bcanalyzer)
-add_subdirectory(llvm-stub)
 add_subdirectory(llvm-stress)
 
 if( NOT WIN32 )
@@ -58,14 +48,8 @@ if( LLVM_ENABLE_PIC )
   endif()
 endif()
 
-set(LLVM_CLANG_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/clang" CACHE PATH "Path to Clang source directory")
-
-if (NOT ${LLVM_CLANG_SOURCE_DIR} STREQUAL ""
-    AND EXISTS ${LLVM_CLANG_SOURCE_DIR}/CMakeLists.txt)
-  option(LLVM_BUILD_CLANG "Whether to build Clang as part of LLVM" ON)
-  if (${LLVM_BUILD_CLANG})
-    add_subdirectory(${LLVM_CLANG_SOURCE_DIR} clang)
-  endif()
-endif ()
+add_llvm_external_project(clang)
+add_llvm_external_project(lld)
+add_llvm_external_project(polly)
 
 set(LLVM_COMMON_DEPENDS ${LLVM_COMMON_DEPENDS} PARENT_SCOPE)
diff --git a/tools/LLVMBuild.txt b/tools/LLVMBuild.txt
index aba990f52114..df4aa9ff4e4d 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-ld llvm-link llvm-mc llvm-nm llvm-objdump llvm-prof llvm-ranlib llvm-rtdyld llvm-size llvm-stub macho-dump opt
+subdirectories = bugpoint llc lli llvm-ar llvm-as llvm-bcanalyzer llvm-cov llvm-diff llvm-dis llvm-dwarfdump llvm-extract llvm-link llvm-mc llvm-nm llvm-objdump llvm-prof llvm-ranlib llvm-rtdyld llvm-size macho-dump opt
 
 [component_0]
 type = Group
diff --git a/tools/Makefile b/tools/Makefile
index 8bf091a72a08..2b4b9b7878be 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -29,9 +29,9 @@ OPTIONAL_DIRS := lldb
 DIRS := llvm-config
 PARALLEL_DIRS := opt llvm-as llvm-dis \
                  llc llvm-ranlib llvm-ar llvm-nm \
-                 llvm-ld llvm-prof llvm-link \
+                 llvm-prof llvm-link \
                  lli llvm-extract llvm-mc \
-                 bugpoint llvm-bcanalyzer llvm-stub \
+                 bugpoint llvm-bcanalyzer \
                  llvm-diff macho-dump llvm-objdump llvm-readobj \
 	         llvm-rtdyld llvm-dwarfdump llvm-cov \
 	         llvm-size llvm-stress
diff --git a/tools/bugpoint/BugDriver.cpp b/tools/bugpoint/BugDriver.cpp
index 6b219bf08587..21636eabab1f 100644
--- a/tools/bugpoint/BugDriver.cpp
+++ b/tools/bugpoint/BugDriver.cpp
@@ -156,7 +156,7 @@ bool BugDriver::run(std::string &ErrMsg) {
   // If we're not running as a child, the first thing that we must do is
   // determine what the problem is. Does the optimization series crash the
   // compiler, or does it produce illegal code?  We make the top-level
-  // decision by trying to run all of the passes on the the input program,
+  // decision by trying to run all of the passes on the input program,
   // which should generate a bitcode file.  If it does generate a bitcode
   // file, then we know the compiler didn't crash, so try to diagnose a
   // miscompilation.
diff --git a/tools/bugpoint/ExtractFunction.cpp b/tools/bugpoint/ExtractFunction.cpp
index ac8e15971157..888d2c8e9262 100644
--- a/tools/bugpoint/ExtractFunction.cpp
+++ b/tools/bugpoint/ExtractFunction.cpp
@@ -24,7 +24,7 @@
 #include "llvm/Transforms/IPO.h"
 #include "llvm/Transforms/Scalar.h"
 #include "llvm/Transforms/Utils/Cloning.h"
-#include "llvm/Transforms/Utils/FunctionUtils.h"
+#include "llvm/Transforms/Utils/CodeExtractor.h"
 #include "llvm/Target/TargetData.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Debug.h"
diff --git a/tools/bugpoint/ToolRunner.cpp b/tools/bugpoint/ToolRunner.cpp
index 25a2baef7dc8..d975d68d9697 100644
--- a/tools/bugpoint/ToolRunner.cpp
+++ b/tools/bugpoint/ToolRunner.cpp
@@ -128,7 +128,7 @@ static int RunProgramRemotelyWithTimeout(const sys::Path &RemoteClientPath,
       ErrorFile.close();
     }
 
-    errs() << OS;
+    errs() << OS.str();
   }
 
   return ReturnCode;
diff --git a/tools/gold/gold-plugin.cpp b/tools/gold/gold-plugin.cpp
index cfd84c0f67d7..9c17da6a4cb6 100644
--- a/tools/gold/gold-plugin.cpp
+++ b/tools/gold/gold-plugin.cpp
@@ -153,6 +153,8 @@ ld_plugin_status onload(ld_plugin_tv *tv) {
         switch (tv->tv_u.tv_val) {
           case LDPO_REL:  // .o
           case LDPO_DYN:  // .so
+          // FIXME: Replace 3 with LDPO_PIE once that is in a released binutils.
+          case 3: // position independent executable
             output_type = LTO_CODEGEN_PIC_MODEL_DYNAMIC;
             break;
           case LDPO_EXEC:  // .exe
diff --git a/tools/llc/llc.cpp b/tools/llc/llc.cpp
index ceff8a6c8cc8..8951050c07cd 100644
--- a/tools/llc/llc.cpp
+++ b/tools/llc/llc.cpp
@@ -18,6 +18,7 @@
 #include "llvm/PassManager.h"
 #include "llvm/Pass.h"
 #include "llvm/ADT/Triple.h"
+#include "llvm/Assembly/PrintModulePass.h"
 #include "llvm/Support/IRReader.h"
 #include "llvm/CodeGen/LinkAllAsmWriterComponents.h"
 #include "llvm/CodeGen/LinkAllCodegenComponents.h"
@@ -34,6 +35,7 @@
 #include "llvm/Support/TargetRegistry.h"
 #include "llvm/Support/TargetSelect.h"
 #include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetLibraryInfo.h"
 #include "llvm/Target/TargetMachine.h"
 #include <memory>
 using namespace llvm;
@@ -118,7 +120,7 @@ FileType("filetype", cl::init(TargetMachine::CGFT_AssemblyFile),
        clEnumValN(TargetMachine::CGFT_AssemblyFile, "asm",
                   "Emit an assembly ('.s') file"),
        clEnumValN(TargetMachine::CGFT_ObjectFile, "obj",
-                  "Emit a native object ('.o') file [experimental]"),
+                  "Emit a native object ('.o') file"),
        clEnumValN(TargetMachine::CGFT_Null, "null",
                   "Emit nothing, for performance testing"),
        clEnumValEnd));
@@ -146,11 +148,6 @@ EnableFPMAD("enable-fp-mad",
   cl::init(false));
 
 static cl::opt<bool>
-PrintCode("print-machineinstrs",
-  cl::desc("Print generated machine code"),
-  cl::init(false));
-
-static cl::opt<bool>
 DisableFPElim("disable-fp-elim",
   cl::desc("Disable frame pointer elimination optimization"),
   cl::init(false));
@@ -161,11 +158,6 @@ DisableFPElimNonLeaf("disable-non-leaf-fp-elim",
   cl::init(false));
 
 static cl::opt<bool>
-DisableExcessPrecision("disable-excess-fp-precision",
-  cl::desc("Disable optimizations that may increase FP precision"),
-  cl::init(false));
-
-static cl::opt<bool>
 EnableUnsafeFPMath("enable-unsafe-fp-math",
   cl::desc("Enable optimizations that may decrease FP precision"),
   cl::init(false));
@@ -204,12 +196,30 @@ FloatABIForCalls("float-abi",
                "Hard float ABI (uses FP registers)"),
     clEnumValEnd));
 
+static cl::opt<llvm::FPOpFusion::FPOpFusionMode>
+FuseFPOps("fp-contract",
+  cl::desc("Enable aggresive formation of fused FP ops"),
+  cl::init(FPOpFusion::Standard),
+  cl::values(
+    clEnumValN(FPOpFusion::Fast, "fast",
+               "Fuse FP ops whenever profitable"),
+    clEnumValN(FPOpFusion::Standard, "on",
+               "Only fuse 'blessed' FP ops."),
+    clEnumValN(FPOpFusion::Strict, "off",
+               "Only fuse FP ops when the result won't be effected."),
+    clEnumValEnd));
+
 static cl::opt<bool>
 DontPlaceZerosInBSS("nozero-initialized-in-bss",
   cl::desc("Don't place zero-initialized symbols into bss section"),
   cl::init(false));
 
 static cl::opt<bool>
+DisableSimplifyLibCalls("disable-simplify-libcalls",
+  cl::desc("Disable simplify-libcalls"),
+  cl::init(false));
+
+static cl::opt<bool>
 EnableGuaranteedTailCallOpt("tailcallopt",
   cl::desc("Turn fastcc calls into tail calls by (potentially) changing ABI."),
   cl::init(false));
@@ -229,11 +239,6 @@ EnableRealignStack("realign-stack",
   cl::desc("Realign stack if needed"),
   cl::init(true));
 
-static cl::opt<bool>
-DisableSwitchTables(cl::Hidden, "disable-jump-tables",
-  cl::desc("Do not generate jump tables."),
-  cl::init(false));
-
 static cl::opt<std::string>
 TrapFuncName("trap-func", cl::Hidden,
   cl::desc("Emit a call to trap function rather than a trap instruction"),
@@ -249,6 +254,19 @@ SegmentedStacks("segmented-stacks",
   cl::desc("Use segmented stacks if possible."),
   cl::init(false));
 
+static cl::opt<bool>
+UseInitArray("use-init-array",
+  cl::desc("Use .init_array instead of .ctors."),
+  cl::init(false));
+
+static cl::opt<std::string> StopAfter("stop-after",
+  cl::desc("Stop compilation after a specific pass"),
+  cl::value_desc("pass-name"),
+  cl::init(""));
+static cl::opt<std::string> StartAfter("start-after",
+  cl::desc("Resume compilation after a specific pass"),
+  cl::value_desc("pass-name"),
+  cl::init(""));
 
 // GetFileNameRoot - Helper function to get the basename of a filename.
 static inline std::string
@@ -346,6 +364,15 @@ int main(int argc, char **argv) {
   InitializeAllAsmPrinters();
   InitializeAllAsmParsers();
 
+  // Initialize codegen and IR passes used by llc so that the -print-after,
+  // -print-before, and -stop-after options work.
+  PassRegistry *Registry = PassRegistry::getPassRegistry();
+  initializeCore(*Registry);
+  initializeCodeGen(*Registry);
+  initializeLoopStrengthReducePass(*Registry);
+  initializeLowerIntrinsicsPass(*Registry);
+  initializeUnreachableBlockElimPass(*Registry);
+
   // Register the target printer for --version.
   cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion);
 
@@ -354,54 +381,39 @@ int main(int argc, char **argv) {
   // Load the module to be compiled...
   SMDiagnostic Err;
   std::auto_ptr<Module> M;
+  Module *mod = 0;
+  Triple TheTriple;
+
+  bool SkipModule = MCPU == "help" ||
+                    (!MAttrs.empty() && MAttrs.front() == "help");
+
+  // If user just wants to list available options, skip module loading
+  if (!SkipModule) {
+    M.reset(ParseIRFile(InputFilename, Err, Context));
+    mod = M.get();
+    if (mod == 0) {
+      Err.print(argv[0], errs());
+      return 1;
+    }
 
-  M.reset(ParseIRFile(InputFilename, Err, Context));
-  if (M.get() == 0) {
-    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());
+  } else {
+    TheTriple = Triple(Triple::normalize(TargetTriple));
   }
-  Module &mod = *M.get();
 
-  // If we are supposed to override the target triple, do so now.
-  if (!TargetTriple.empty())
-    mod.setTargetTriple(Triple::normalize(TargetTriple));
-
-  Triple TheTriple(mod.getTargetTriple());
   if (TheTriple.getTriple().empty())
     TheTriple.setTriple(sys::getDefaultTargetTriple());
 
-  // Allocate target machine.  First, check whether the user has explicitly
-  // specified an architecture to compile for. If so we have to look it up by
-  // name, because it might be a backend that has no mapping to a target triple.
-  const Target *TheTarget = 0;
-  if (!MArch.empty()) {
-    for (TargetRegistry::iterator it = TargetRegistry::begin(),
-           ie = TargetRegistry::end(); it != ie; ++it) {
-      if (MArch == it->getName()) {
-        TheTarget = &*it;
-        break;
-      }
-    }
-
-    if (!TheTarget) {
-      errs() << argv[0] << ": error: invalid target '" << MArch << "'.\n";
-      return 1;
-    }
-
-    // Adjust the triple to match (if known), otherwise stick with the
-    // module/host triple.
-    Triple::ArchType Type = Triple::getArchTypeForLLVMName(MArch);
-    if (Type != Triple::UnknownArch)
-      TheTriple.setArch(Type);
-  } else {
-    std::string Err;
-    TheTarget = TargetRegistry::lookupTarget(TheTriple.getTriple(), Err);
-    if (TheTarget == 0) {
-      errs() << argv[0] << ": error auto-selecting target for module '"
-             << Err << "'.  Please use the -march option to explicitly "
-             << "pick a target.\n";
-      return 1;
-    }
+  // Get the target specific parser.
+  std::string Error;
+  const Target *TheTarget = TargetRegistry::lookupTarget(MArch, TheTriple,
+                                                         Error);
+  if (!TheTarget) {
+    errs() << argv[0] << ": " << Error;
+    return 1;
   }
 
   // Package up features to be passed to target/subtarget
@@ -427,10 +439,9 @@ int main(int argc, char **argv) {
 
   TargetOptions Options;
   Options.LessPreciseFPMADOption = EnableFPMAD;
-  Options.PrintMachineCode = PrintCode;
   Options.NoFramePointerElim = DisableFPElim;
   Options.NoFramePointerElimNonLeaf = DisableFPElimNonLeaf;
-  Options.NoExcessFPPrecision = DisableExcessPrecision;
+  Options.AllowFPOpFusion = FuseFPOps;
   Options.UnsafeFPMath = EnableUnsafeFPMath;
   Options.NoInfsFPMath = EnableNoInfsFPMath;
   Options.NoNaNsFPMath = EnableNoNaNsFPMath;
@@ -444,16 +455,17 @@ int main(int argc, char **argv) {
   Options.DisableTailCalls = DisableTailCalls;
   Options.StackAlignmentOverride = OverrideStackAlignment;
   Options.RealignStack = EnableRealignStack;
-  Options.DisableJumpTables = DisableSwitchTables;
   Options.TrapFuncName = TrapFuncName;
   Options.PositionIndependentExecutable = EnablePIE;
   Options.EnableSegmentedStacks = SegmentedStacks;
+  Options.UseInitArray = UseInitArray;
 
   std::auto_ptr<TargetMachine>
     target(TheTarget->createTargetMachine(TheTriple.getTriple(),
                                           MCPU, FeaturesStr, Options,
                                           RelocModel, CMModel, OLvl));
   assert(target.get() && "Could not allocate target machine!");
+  assert(mod && "Should have exited after outputting help!");
   TargetMachine &Target = *target.get();
 
   if (DisableDotLoc)
@@ -473,7 +485,7 @@ int main(int argc, char **argv) {
       TheTriple.isMacOSXVersionLT(10, 6))
     Target.setMCUseLoc(false);
 
-  // Figure out where we are going to send the output...
+  // Figure out where we are going to send the output.
   OwningPtr<tool_output_file> Out
     (GetOutputStream(TheTarget->getName(), TheTriple.getOS(), argv[0]));
   if (!Out) return 1;
@@ -481,11 +493,17 @@ int main(int argc, char **argv) {
   // Build up all of the passes that we want to do to the module.
   PassManager PM;
 
+  // Add an appropriate TargetLibraryInfo pass for the module's triple.
+  TargetLibraryInfo *TLI = new TargetLibraryInfo(TheTriple);
+  if (DisableSimplifyLibCalls)
+    TLI->disableAllFunctions();
+  PM.add(TLI);
+
   // Add the target data from the target machine, if it exists, or the module.
   if (const TargetData *TD = Target.getTargetData())
     PM.add(new TargetData(*TD));
   else
-    PM.add(new TargetData(&mod));
+    PM.add(new TargetData(mod));
 
   // Override default to generate verbose assembly.
   Target.setAsmVerbosityDefault(true);
@@ -501,8 +519,29 @@ int main(int argc, char **argv) {
   {
     formatted_raw_ostream FOS(Out->os());
 
+    AnalysisID StartAfterID = 0;
+    AnalysisID StopAfterID = 0;
+    const PassRegistry *PR = PassRegistry::getPassRegistry();
+    if (!StartAfter.empty()) {
+      const PassInfo *PI = PR->getPassInfo(StartAfter);
+      if (!PI) {
+        errs() << argv[0] << ": start-after pass is not registered.\n";
+        return 1;
+      }
+      StartAfterID = PI->getTypeInfo();
+    }
+    if (!StopAfter.empty()) {
+      const PassInfo *PI = PR->getPassInfo(StopAfter);
+      if (!PI) {
+        errs() << argv[0] << ": stop-after pass is not registered.\n";
+        return 1;
+      }
+      StopAfterID = PI->getTypeInfo();
+    }
+
     // Ask the target to add backend passes as necessary.
-    if (Target.addPassesToEmitFile(PM, FOS, FileType, NoVerify)) {
+    if (Target.addPassesToEmitFile(PM, FOS, FileType, NoVerify,
+                                   StartAfterID, StopAfterID)) {
       errs() << argv[0] << ": target does not support generation of this"
              << " file type!\n";
       return 1;
@@ -511,7 +550,7 @@ int main(int argc, char **argv) {
     // Before executing passes, print the final values of the LLVM options.
     cl::PrintOptionValues();
 
-    PM.run(mod);
+    PM.run(*mod);
   }
 
   // Declare success.
diff --git a/tools/lli/lli.cpp b/tools/lli/lli.cpp
index 2e2bf7d66ec3..b6c9299c65b5 100644
--- a/tools/lli/lli.cpp
+++ b/tools/lli/lli.cpp
@@ -35,8 +35,20 @@
 #include "llvm/Support/Process.h"
 #include "llvm/Support/Signals.h"
 #include "llvm/Support/TargetSelect.h"
+#include "llvm/Support/DynamicLibrary.h"
+#include "llvm/Support/Memory.h"
 #include <cerrno>
 
+#ifdef __linux__
+// These includes used by LLIMCJITMemoryManager::getPointerToNamedFunction()
+// for Glibc trickery. Look comments in this function for more information.
+#ifdef HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#include <fcntl.h>
+#include <unistd.h>
+#endif
+
 #ifdef __CYGWIN__
 #include <cygwin/version.h>
 #if defined(CYGWIN_VERSION_DLL_MAJOR) && CYGWIN_VERSION_DLL_MAJOR<1007
@@ -175,6 +187,191 @@ static void do_shutdown() {
 #endif
 }
 
+// Memory manager for MCJIT
+class LLIMCJITMemoryManager : public JITMemoryManager {
+public:
+  SmallVector<sys::MemoryBlock, 16> AllocatedDataMem;
+  SmallVector<sys::MemoryBlock, 16> AllocatedCodeMem;
+  SmallVector<sys::MemoryBlock, 16> FreeCodeMem;
+
+  LLIMCJITMemoryManager() { }
+  ~LLIMCJITMemoryManager();
+
+  virtual uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
+                                       unsigned SectionID);
+
+  virtual uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
+                                       unsigned SectionID);
+
+  virtual void *getPointerToNamedFunction(const std::string &Name,
+                                          bool AbortOnFailure = true);
+
+  // Invalidate instruction cache for code sections. Some platforms with
+  // separate data cache and instruction cache require explicit cache flush,
+  // otherwise JIT code manipulations (like resolved relocations) will get to
+  // the data cache but not to the instruction cache.
+  virtual void invalidateInstructionCache();
+
+  // The MCJITMemoryManager doesn't use the following functions, so we don't
+  // need implement them.
+  virtual void setMemoryWritable() {
+    llvm_unreachable("Unexpected call!");
+  }
+  virtual void setMemoryExecutable() {
+    llvm_unreachable("Unexpected call!");
+  }
+  virtual void setPoisonMemory(bool poison) {
+    llvm_unreachable("Unexpected call!");
+  }
+  virtual void AllocateGOT() {
+    llvm_unreachable("Unexpected call!");
+  }
+  virtual uint8_t *getGOTBase() const {
+    llvm_unreachable("Unexpected call!");
+    return 0;
+  }
+  virtual uint8_t *startFunctionBody(const Function *F,
+                                     uintptr_t &ActualSize){
+    llvm_unreachable("Unexpected call!");
+    return 0;
+  }
+  virtual uint8_t *allocateStub(const GlobalValue* F, unsigned StubSize,
+                                unsigned Alignment) {
+    llvm_unreachable("Unexpected call!");
+    return 0;
+  }
+  virtual void endFunctionBody(const Function *F, uint8_t *FunctionStart,
+                               uint8_t *FunctionEnd) {
+    llvm_unreachable("Unexpected call!");
+  }
+  virtual uint8_t *allocateSpace(intptr_t Size, unsigned Alignment) {
+    llvm_unreachable("Unexpected call!");
+    return 0;
+  }
+  virtual uint8_t *allocateGlobal(uintptr_t Size, unsigned Alignment) {
+    llvm_unreachable("Unexpected call!");
+    return 0;
+  }
+  virtual void deallocateFunctionBody(void *Body) {
+    llvm_unreachable("Unexpected call!");
+  }
+  virtual uint8_t* startExceptionTable(const Function* F,
+                                       uintptr_t &ActualSize) {
+    llvm_unreachable("Unexpected call!");
+    return 0;
+  }
+  virtual void endExceptionTable(const Function *F, uint8_t *TableStart,
+                                 uint8_t *TableEnd, uint8_t* FrameRegister) {
+    llvm_unreachable("Unexpected call!");
+  }
+  virtual void deallocateExceptionTable(void *ET) {
+    llvm_unreachable("Unexpected call!");
+  }
+};
+
+uint8_t *LLIMCJITMemoryManager::allocateDataSection(uintptr_t Size,
+                                                    unsigned Alignment,
+                                                    unsigned SectionID) {
+  if (!Alignment)
+    Alignment = 16;
+  uint8_t *Addr = (uint8_t*)calloc((Size + Alignment - 1)/Alignment, Alignment);
+  AllocatedDataMem.push_back(sys::MemoryBlock(Addr, Size));
+  return Addr;
+}
+
+uint8_t *LLIMCJITMemoryManager::allocateCodeSection(uintptr_t Size,
+                                                    unsigned Alignment,
+                                                    unsigned SectionID) {
+  if (!Alignment)
+    Alignment = 16;
+  unsigned NeedAllocate = Alignment * ((Size + Alignment - 1)/Alignment + 1);
+  uintptr_t Addr = 0;
+  // Look in the list of free code memory regions and use a block there if one
+  // is available.
+  for (int i = 0, e = FreeCodeMem.size(); i != e; ++i) {
+    sys::MemoryBlock &MB = FreeCodeMem[i];
+    if (MB.size() >= NeedAllocate) {
+      Addr = (uintptr_t)MB.base();
+      uintptr_t EndOfBlock = Addr + MB.size();
+      // Align the address.
+      Addr = (Addr + Alignment - 1) & ~(uintptr_t)(Alignment - 1);
+      // Store cutted free memory block.
+      FreeCodeMem[i] = sys::MemoryBlock((void*)(Addr + Size),
+                                        EndOfBlock - Addr - Size);
+      return (uint8_t*)Addr;
+    }
+  }
+
+  // No pre-allocated free block was large enough. Allocate a new memory region.
+  sys::MemoryBlock MB = sys::Memory::AllocateRWX(NeedAllocate, 0, 0);
+
+  AllocatedCodeMem.push_back(MB);
+  Addr = (uintptr_t)MB.base();
+  uintptr_t EndOfBlock = Addr + MB.size();
+  // Align the address.
+  Addr = (Addr + Alignment - 1) & ~(uintptr_t)(Alignment - 1);
+  // The AllocateRWX may allocate much more memory than we need. In this case,
+  // we store the unused memory as a free memory block.
+  unsigned FreeSize = EndOfBlock-Addr-Size;
+  if (FreeSize > 16)
+    FreeCodeMem.push_back(sys::MemoryBlock((void*)(Addr + Size), FreeSize));
+
+  // Return aligned address
+  return (uint8_t*)Addr;
+}
+
+void LLIMCJITMemoryManager::invalidateInstructionCache() {
+  for (int i = 0, e = AllocatedCodeMem.size(); i != e; ++i)
+    sys::Memory::InvalidateInstructionCache(AllocatedCodeMem[i].base(),
+                                            AllocatedCodeMem[i].size());
+}
+
+void *LLIMCJITMemoryManager::getPointerToNamedFunction(const std::string &Name,
+                                                       bool AbortOnFailure) {
+#if defined(__linux__)
+  //===--------------------------------------------------------------------===//
+  // Function stubs that are invoked instead of certain library calls
+  //
+  // Force the following functions to be linked in to anything that uses the
+  // JIT. This is a hack designed to work around the all-too-clever Glibc
+  // strategy of making these functions work differently when inlined vs. when
+  // not inlined, and hiding their real definitions in a separate archive file
+  // that the dynamic linker can't see. For more info, search for
+  // 'libc_nonshared.a' on Google, or read http://llvm.org/PR274.
+  if (Name == "stat") return (void*)(intptr_t)&stat;
+  if (Name == "fstat") return (void*)(intptr_t)&fstat;
+  if (Name == "lstat") return (void*)(intptr_t)&lstat;
+  if (Name == "stat64") return (void*)(intptr_t)&stat64;
+  if (Name == "fstat64") return (void*)(intptr_t)&fstat64;
+  if (Name == "lstat64") return (void*)(intptr_t)&lstat64;
+  if (Name == "atexit") return (void*)(intptr_t)&atexit;
+  if (Name == "mknod") return (void*)(intptr_t)&mknod;
+#endif // __linux__
+
+  const char *NameStr = Name.c_str();
+  void *Ptr = sys::DynamicLibrary::SearchForAddressOfSymbol(NameStr);
+  if (Ptr) return Ptr;
+
+  // If it wasn't found and if it starts with an underscore ('_') character,
+  // try again without the underscore.
+  if (NameStr[0] == '_') {
+    Ptr = sys::DynamicLibrary::SearchForAddressOfSymbol(NameStr+1);
+    if (Ptr) return Ptr;
+  }
+
+  if (AbortOnFailure)
+    report_fatal_error("Program used external function '" + Name +
+                      "' which could not be resolved!");
+  return 0;
+}
+
+LLIMCJITMemoryManager::~LLIMCJITMemoryManager() {
+  for (unsigned i = 0, e = AllocatedCodeMem.size(); i != e; ++i)
+    sys::Memory::ReleaseRWX(AllocatedCodeMem[i]);
+  for (unsigned i = 0, e = AllocatedDataMem.size(); i != e; ++i)
+    free(AllocatedDataMem[i].base());
+}
+
 //===----------------------------------------------------------------------===//
 // main Driver function
 //
@@ -222,8 +419,6 @@ int main(int argc, char **argv, char * const *envp) {
   builder.setRelocationModel(RelocModel);
   builder.setCodeModel(CMModel);
   builder.setErrorStr(&ErrorMsg);
-  builder.setJITMemoryManager(ForceInterpreter ? 0 :
-                              JITMemoryManager::CreateDefaultMemManager());
   builder.setEngineKind(ForceInterpreter
                         ? EngineKind::Interpreter
                         : EngineKind::JIT);
@@ -233,9 +428,14 @@ int main(int argc, char **argv, char * const *envp) {
     Mod->setTargetTriple(Triple::normalize(TargetTriple));
 
   // Enable MCJIT if desired.
+  LLIMCJITMemoryManager *JMM = 0;
   if (UseMCJIT && !ForceInterpreter) {
     builder.setUseMCJIT(true);
-    builder.setJITMemoryManager(JITMemoryManager::CreateDefaultMemManager());
+    JMM = new LLIMCJITMemoryManager();
+    builder.setJITMemoryManager(JMM);
+  } else {
+    builder.setJITMemoryManager(ForceInterpreter ? 0 :
+                                JITMemoryManager::CreateDefaultMemManager());
   }
 
   CodeGenOpt::Level OLvl = CodeGenOpt::Default;
@@ -266,6 +466,10 @@ int main(int argc, char **argv, char * const *envp) {
     exit(1);
   }
 
+  // Clear instruction cache before code will be executed.
+  if (JMM)
+    JMM->invalidateInstructionCache();
+
   // The following functions have no effect if their respective profiling
   // support wasn't enabled in the build configuration.
   EE->RegisterJITEventListener(
diff --git a/tools/llvm-ar/llvm-ar.cpp b/tools/llvm-ar/llvm-ar.cpp
index c1c8b2474e79..7c53701f009e 100644
--- a/tools/llvm-ar/llvm-ar.cpp
+++ b/tools/llvm-ar/llvm-ar.cpp
@@ -50,7 +50,7 @@ static cl::extrahelp MoreHelp(
   "  m[abiSs]     - move file(s) in the archive\n"
   "  p[kN]        - print file(s) found in the archive\n"
   "  q[ufsS]      - quick append file(s) to the archive\n"
-  "  r[abfiuzRsS] - replace or insert file(s) into the archive\n"
+  "  r[abfiuRsS]  - replace or insert file(s) into the archive\n"
   "  t            - display contents of archive\n"
   "  x[No]        - extract file(s) from the archive\n"
   "\nMODIFIERS (operation specific):\n"
@@ -66,7 +66,6 @@ static cl::extrahelp MoreHelp(
   "  [s] - create an archive index (cf. ranlib)\n"
   "  [S] - do not build a symbol table\n"
   "  [u] - update only files newer than archive contents\n"
-  "  [z] - compress files before inserting/extracting\n"
   "\nMODIFIERS (generic):\n"
   "  [c] - do not warn if the library had to be created\n"
   "  [v] - be verbose about actions taken\n"
@@ -101,7 +100,6 @@ bool SymTable = true;            ///< 's' & 'S' modifiers
 bool OnlyUpdate = false;         ///< 'u' modifier
 bool Verbose = false;            ///< 'v' modifier
 bool ReallyVerbose = false;      ///< 'V' modifier
-bool Compression = false;        ///< 'z' modifier
 
 // Relative Positional Argument (for insert/move). This variable holds
 // the name of the archive member to which the 'a', 'b' or 'i' modifier
@@ -208,7 +206,6 @@ ArchiveOperation parseCommandLine() {
     case 'u': OnlyUpdate = true; break;
     case 'v': Verbose = true; break;
     case 'V': Verbose = ReallyVerbose = true; break;
-    case 'z': Compression = true; break;
     case 'a':
       getRelPos();
       AddAfter = true;
@@ -260,8 +257,6 @@ ArchiveOperation parseCommandLine() {
     throw "The 'f' modifier is only applicable to the 'q' and 'r' operations";
   if (OnlyUpdate && Operation != ReplaceOrInsert)
     throw "The 'u' modifier is only applicable to the 'r' operation";
-  if (Compression && Operation!=ReplaceOrInsert && Operation!=Extract)
-    throw "The 'z' modifier is only applicable to the 'r' and 'x' operations";
   if (Count > 1 && Members.size() > 1)
     throw "Only one member name may be specified with the 'N' modifier";
 
@@ -413,8 +408,6 @@ doDisplayTable(std::string* ErrMsg) {
         // Zrw-r--r--  500/ 500    525 Nov  8 17:42 2004 Makefile
         if (I->isBitcode())
           outs() << "b";
-        else if (I->isCompressed())
-          outs() << "Z";
         else
           outs() << " ";
         unsigned mode = I->getMode();
@@ -437,7 +430,7 @@ doDisplayTable(std::string* ErrMsg) {
 }
 
 // doExtract - Implement the 'x' operation. This function extracts files back to
-// the file system, making sure to uncompress any that were compressed
+// the file system.
 bool
 doExtract(std::string* ErrMsg) {
   if (buildPaths(false, ErrMsg))
@@ -503,7 +496,7 @@ doDelete(std::string* ErrMsg) {
   }
 
   // We're done editting, reconstruct the archive.
-  if (TheArchive->writeToDisk(SymTable,TruncateNames,Compression,ErrMsg))
+  if (TheArchive->writeToDisk(SymTable,TruncateNames,ErrMsg))
     return true;
   if (ReallyVerbose)
     printSymbolTable();
@@ -558,7 +551,7 @@ doMove(std::string* ErrMsg) {
   }
 
   // We're done editting, reconstruct the archive.
-  if (TheArchive->writeToDisk(SymTable,TruncateNames,Compression,ErrMsg))
+  if (TheArchive->writeToDisk(SymTable,TruncateNames,ErrMsg))
     return true;
   if (ReallyVerbose)
     printSymbolTable();
@@ -583,7 +576,7 @@ doQuickAppend(std::string* ErrMsg) {
   }
 
   // We're done editting, reconstruct the archive.
-  if (TheArchive->writeToDisk(SymTable,TruncateNames,Compression,ErrMsg))
+  if (TheArchive->writeToDisk(SymTable,TruncateNames,ErrMsg))
     return true;
   if (ReallyVerbose)
     printSymbolTable();
@@ -681,7 +674,7 @@ doReplaceOrInsert(std::string* ErrMsg) {
   }
 
   // We're done editting, reconstruct the archive.
-  if (TheArchive->writeToDisk(SymTable,TruncateNames,Compression,ErrMsg))
+  if (TheArchive->writeToDisk(SymTable,TruncateNames,ErrMsg))
     return true;
   if (ReallyVerbose)
     printSymbolTable();
diff --git a/tools/llvm-config/Makefile b/tools/llvm-config/Makefile
index 3f11730a37d7..e8c86929e188 100644
--- a/tools/llvm-config/Makefile
+++ b/tools/llvm-config/Makefile
@@ -57,3 +57,11 @@ $(ObjDir)/BuildVariables.inc: $(BUILDVARIABLES_SRCPATH) Makefile $(ObjDir)/.dir
 	  >> temp.sed
 	$(Verb) $(SED) -f temp.sed < $< > $@
 	$(Verb) $(RM) temp.sed
+
+# When cross-compiling, install a version of llvm-config that runs on the host.
+ifeq ($(LLVM_CROSS_COMPILING),1)
+install:: $(DESTDIR)$(PROJ_bindir)
+	$(Echo) Installing llvm-config-host
+	$(Verb) $(ProgInstall) $(BuildLLVMToolDir)/llvm-config \
+	  $(DESTDIR)$(PROJ_bindir)/llvm-config-host
+endif
diff --git a/tools/llvm-config/llvm-config.cpp b/tools/llvm-config/llvm-config.cpp
index 126542c4ecb7..7edf5eca0b2c 100644
--- a/tools/llvm-config/llvm-config.cpp
+++ b/tools/llvm-config/llvm-config.cpp
@@ -190,9 +190,9 @@ int main(int argc, char **argv) {
     sys::path::parent_path(CurrentPath)).str();
 
   // Check to see if we are inside a development tree by comparing to possible
-  // locations (prefix style or CMake style). This could be wrong in the face of
-  // symbolic links, but is good enough.
-  if (CurrentExecPrefix == std::string(LLVM_OBJ_ROOT) + "/" + LLVM_BUILDMODE) {
+  // locations (prefix style or CMake style).
+  if (sys::fs::equivalent(CurrentExecPrefix,
+                          Twine(LLVM_OBJ_ROOT) + "/" + LLVM_BUILDMODE)) {
     IsInDevelopmentTree = true;
     DevelopmentTreeLayout = MakefileStyle;
 
@@ -204,11 +204,12 @@ int main(int argc, char **argv) {
     } else {
       ActiveObjRoot = LLVM_OBJ_ROOT;
     }
-  } else if (CurrentExecPrefix == std::string(LLVM_OBJ_ROOT)) {
+  } else if (sys::fs::equivalent(CurrentExecPrefix, LLVM_OBJ_ROOT)) {
     IsInDevelopmentTree = true;
     DevelopmentTreeLayout = CMakeStyle;
     ActiveObjRoot = LLVM_OBJ_ROOT;
-  } else if (CurrentExecPrefix == std::string(LLVM_OBJ_ROOT) + "/bin") {
+  } else if (sys::fs::equivalent(CurrentExecPrefix,
+                                 Twine(LLVM_OBJ_ROOT) + "/bin")) {
     IsInDevelopmentTree = true;
     DevelopmentTreeLayout = CMakeBuildModeStyle;
     ActiveObjRoot = LLVM_OBJ_ROOT;
diff --git a/tools/llvm-diff/DiffConsumer.cpp b/tools/llvm-diff/DiffConsumer.cpp
index 05280392a47f..91c1699bee53 100644
--- a/tools/llvm-diff/DiffConsumer.cpp
+++ b/tools/llvm-diff/DiffConsumer.cpp
@@ -7,7 +7,7 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// This files implements the the LLVM difference Consumer
+// This files implements the LLVM difference Consumer
 //
 //===----------------------------------------------------------------------===//
 
diff --git a/tools/llvm-diff/DiffConsumer.h b/tools/llvm-diff/DiffConsumer.h
index 2060fe1c944f..98e369ba9768 100644
--- a/tools/llvm-diff/DiffConsumer.h
+++ b/tools/llvm-diff/DiffConsumer.h
@@ -67,8 +67,6 @@ namespace llvm {
     };
 
     raw_ostream &out;
-    Module *LModule;
-    Module *RModule;
     SmallVector<DiffContext, 5> contexts;
     bool Differences;
     unsigned Indent;
@@ -78,8 +76,8 @@ namespace llvm {
     void indent();
 
   public:
-    DiffConsumer(Module *L, Module *R)
-      : out(errs()), LModule(L), RModule(R), Differences(false), Indent(0) {}
+    DiffConsumer()
+      : out(errs()), Differences(false), Indent(0) {}
 
     bool hadDifferences() const;
     void enterContext(Value *L, Value *R);
diff --git a/tools/llvm-diff/DifferenceEngine.cpp b/tools/llvm-diff/DifferenceEngine.cpp
index a5a99f5b9c47..0c1e30c987ea 100644
--- a/tools/llvm-diff/DifferenceEngine.cpp
+++ b/tools/llvm-diff/DifferenceEngine.cpp
@@ -318,15 +318,15 @@ class FunctionDifferenceEngine {
 
       bool Difference = false;
 
-      DenseMap<ConstantInt*,BasicBlock*> LCases;
+      DenseMap<Constant*, BasicBlock*> LCases;
       
       for (SwitchInst::CaseIt I = LI->case_begin(), E = LI->case_end();
            I != E; ++I)
-        LCases[I.getCaseValue()] = I.getCaseSuccessor();
+        LCases[I.getCaseValueEx()] = I.getCaseSuccessor();
         
       for (SwitchInst::CaseIt I = RI->case_begin(), E = RI->case_end();
            I != E; ++I) {
-        ConstantInt *CaseValue = I.getCaseValue();
+        IntegersSubset CaseValue = I.getCaseValueEx();
         BasicBlock *LCase = LCases[CaseValue];
         if (LCase) {
           if (TryUnify) tryUnify(LCase, I.getCaseSuccessor());
@@ -338,7 +338,7 @@ class FunctionDifferenceEngine {
         }
       }
       if (!Difference)
-        for (DenseMap<ConstantInt*,BasicBlock*>::iterator
+        for (DenseMap<Constant*, BasicBlock*>::iterator
                I = LCases.begin(), E = LCases.end(); I != E; ++I) {
           if (Complain)
             Engine.logf("left switch has extra case %l") << I->first;
diff --git a/tools/llvm-diff/DifferenceEngine.h b/tools/llvm-diff/DifferenceEngine.h
index 7ea79e430ff5..0246d8ff5d6b 100644
--- a/tools/llvm-diff/DifferenceEngine.h
+++ b/tools/llvm-diff/DifferenceEngine.h
@@ -59,8 +59,8 @@ namespace llvm {
       virtual ~Oracle() {}
     };
 
-    DifferenceEngine(LLVMContext &context, Consumer &consumer)
-      : context(context), consumer(consumer), globalValueOracle(0) {}
+    DifferenceEngine(Consumer &consumer)
+      : consumer(consumer), globalValueOracle(0) {}
 
     void diff(Module *L, Module *R);
     void diff(Function *L, Function *R);
@@ -84,7 +84,6 @@ namespace llvm {
     bool equivalentAsOperands(GlobalValue *L, GlobalValue *R);
 
   private:
-    LLVMContext &context;
     Consumer &consumer;
     Oracle *globalValueOracle;
   };
diff --git a/tools/llvm-diff/llvm-diff.cpp b/tools/llvm-diff/llvm-diff.cpp
index 774169bcde17..45957b3f8c92 100644
--- a/tools/llvm-diff/llvm-diff.cpp
+++ b/tools/llvm-diff/llvm-diff.cpp
@@ -78,8 +78,8 @@ int main(int argc, char **argv) {
   Module *RModule = ReadModule(Context, RightFilename);
   if (!LModule || !RModule) return 1;
 
-  DiffConsumer Consumer(LModule, RModule);
-  DifferenceEngine Engine(Context, Consumer);
+  DiffConsumer Consumer;
+  DifferenceEngine Engine(Consumer);
 
   // If any global names were given, just diff those.
   if (!GlobalsToCompare.empty()) {
diff --git a/tools/llvm-dis/llvm-dis.cpp b/tools/llvm-dis/llvm-dis.cpp
index 6450ea6ac74b..41f023d4c43f 100644
--- a/tools/llvm-dis/llvm-dis.cpp
+++ b/tools/llvm-dis/llvm-dis.cpp
@@ -17,11 +17,11 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/LLVMContext.h"
+#include "llvm/DebugInfo.h"
 #include "llvm/Module.h"
 #include "llvm/Type.h"
 #include "llvm/IntrinsicInst.h"
 #include "llvm/Bitcode/ReaderWriter.h"
-#include "llvm/Analysis/DebugInfo.h"
 #include "llvm/Assembly/AssemblyAnnotationWriter.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/DataStream.h"
@@ -93,7 +93,6 @@ public:
         DIVariable Var(DDI->getVariable());
         if (!Padded) {
           OS.PadToColumn(50);
-          Padded = true;
           OS << ";";
         }
         OS << " [debug variable = " << Var.getName() << "]";
@@ -102,7 +101,6 @@ public:
         DIVariable Var(DVI->getVariable());
         if (!Padded) {
           OS.PadToColumn(50);
-          Padded = true;
           OS << ";";
         }
         OS << " [debug variable = " << Var.getName() << "]";
diff --git a/tools/llvm-dwarfdump/llvm-dwarfdump.cpp b/tools/llvm-dwarfdump/llvm-dwarfdump.cpp
index ca0493de5ddb..ec0b4aeb63c6 100644
--- a/tools/llvm-dwarfdump/llvm-dwarfdump.cpp
+++ b/tools/llvm-dwarfdump/llvm-dwarfdump.cpp
@@ -39,6 +39,11 @@ static cl::opt<unsigned long long>
 Address("address", cl::init(-1ULL),
         cl::desc("Print line information for a given address"));
 
+static cl::opt<bool>
+PrintFunctions("functions", cl::init(false),
+               cl::desc("Print function names as well as line information "
+                        "for a given address"));
+
 static void DumpInput(const StringRef &Filename) {
   OwningPtr<MemoryBuffer> Buff;
 
@@ -92,7 +97,14 @@ static void DumpInput(const StringRef &Filename) {
     dictx->dump(outs());
   } else {
     // Print line info for the specified address.
-    DILineInfo dli = dictx->getLineInfoForAddress(Address);
+    int spec_flags = DILineInfoSpecifier::FileLineInfo |
+                     DILineInfoSpecifier::AbsoluteFilePath;
+    if (PrintFunctions)
+      spec_flags |= DILineInfoSpecifier::FunctionName;
+    DILineInfo dli = dictx->getLineInfoForAddress(Address, spec_flags);
+    if (PrintFunctions)
+      outs() << (dli.getFunctionName() ? dli.getFunctionName() : "<unknown>")
+             << "\n";
     outs() << (dli.getFileName() ? dli.getFileName() : "<unknown>") << ':'
            << dli.getLine() << ':' << dli.getColumn() << '\n';
   }
diff --git a/tools/llvm-ld/CMakeLists.txt b/tools/llvm-ld/CMakeLists.txt
deleted file mode 100644
index d328a04b0ebe..000000000000
--- a/tools/llvm-ld/CMakeLists.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-set(LLVM_LINK_COMPONENTS ipo scalaropts linker archive bitwriter vectorize)
-
-add_llvm_tool(llvm-ld
-  Optimize.cpp
-  llvm-ld.cpp
-  )
-
-add_dependencies(llvm-ld llvm-stub)
diff --git a/tools/llvm-ld/LLVMBuild.txt b/tools/llvm-ld/LLVMBuild.txt
deleted file mode 100644
index eed0452dcf24..000000000000
--- a/tools/llvm-ld/LLVMBuild.txt
+++ /dev/null
@@ -1,22 +0,0 @@
-;===- ./tools/llvm-ld/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-ld
-parent = Tools
-required_libraries = Archive BitWriter IPO Linker Scalar
diff --git a/tools/llvm-ld/Makefile b/tools/llvm-ld/Makefile
deleted file mode 100644
index 8793ca9c1074..000000000000
--- a/tools/llvm-ld/Makefile
+++ /dev/null
@@ -1,14 +0,0 @@
-##===- tools/llvm-ld/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-ld
-LINK_COMPONENTS := ipo scalaropts linker archive bitwriter vectorize
-
-include $(LEVEL)/Makefile.common
diff --git a/tools/llvm-ld/Optimize.cpp b/tools/llvm-ld/Optimize.cpp
deleted file mode 100644
index 7f3f90014fc2..000000000000
--- a/tools/llvm-ld/Optimize.cpp
+++ /dev/null
@@ -1,130 +0,0 @@
-//===- Optimize.cpp - Optimize a complete program -------------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements all optimization of the linked module for llvm-ld.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Module.h"
-#include "llvm/PassManager.h"
-#include "llvm/Analysis/Verifier.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/raw_ostream.h"
-#include "llvm/Support/DynamicLibrary.h"
-#include "llvm/Target/TargetData.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Support/PassNameParser.h"
-#include "llvm/Support/PluginLoader.h"
-#include "llvm/Transforms/IPO.h"
-#include "llvm/Transforms/IPO/PassManagerBuilder.h"
-#include "llvm/Transforms/Scalar.h"
-using namespace llvm;
-
-// Pass Name Options as generated by the PassNameParser
-static cl::list<const PassInfo*, bool, PassNameParser>
-  OptimizationList(cl::desc("Optimizations available:"));
-
-//Don't verify at the end
-static cl::opt<bool> DontVerify("disable-verify", cl::ReallyHidden);
-
-static cl::opt<bool> DisableInline("disable-inlining",
-  cl::desc("Do not run the inliner pass"));
-
-static cl::opt<bool>
-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> VerifyEach("verify-each",
- cl::desc("Verify intermediate results of all passes"));
-
-static cl::alias ExportDynamic("export-dynamic",
-  cl::aliasopt(DisableInternalize),
-  cl::desc("Alias for -disable-internalize"));
-
-static cl::opt<bool> Strip("strip-all", 
-  cl::desc("Strip all symbol info from executable"));
-
-static cl::alias A0("s", cl::desc("Alias for --strip-all"), 
-  cl::aliasopt(Strip));
-
-static cl::opt<bool> StripDebug("strip-debug",
-  cl::desc("Strip debugger symbol info from executable"));
-
-static cl::alias A1("S", cl::desc("Alias for --strip-debug"),
-  cl::aliasopt(StripDebug));
-
-// A utility function that adds a pass to the pass manager but will also add
-// a verifier pass after if we're supposed to verify.
-static inline void addPass(PassManager &PM, Pass *P) {
-  // Add the pass to the pass manager...
-  PM.add(P);
-
-  // If we are verifying all of the intermediate steps, add the verifier...
-  if (VerifyEach)
-    PM.add(createVerifierPass());
-}
-
-namespace llvm {
-/// Optimize - Perform link time optimizations. This will run the scalar
-/// optimizations, any loaded plugin-optimization modules, and then the
-/// inter-procedural optimizations if applicable.
-void Optimize(Module *M) {
-
-  // Instantiate the pass manager to organize the passes.
-  PassManager Passes;
-
-  // If we're verifying, start off with a verification pass.
-  if (VerifyEach)
-    Passes.add(createVerifierPass());
-
-  // Add an appropriate TargetData instance for this module...
-  addPass(Passes, new TargetData(M));
-
-  if (!DisableOptimizations)
-    PassManagerBuilder().populateLTOPassManager(Passes, !DisableInternalize,
-                                                !DisableInline);
-
-  // If the -s or -S command line options were specified, strip the symbols out
-  // of the resulting program to make it smaller.  -s and -S are GNU ld options
-  // that we are supporting; they alias -strip-all and -strip-debug.
-  if (Strip || StripDebug)
-    addPass(Passes, createStripSymbolsPass(StripDebug && !Strip));
-
-  // Create a new optimization pass for each one specified on the command line
-  std::auto_ptr<TargetMachine> target;
-  for (unsigned i = 0; i < OptimizationList.size(); ++i) {
-    const PassInfo *Opt = OptimizationList[i];
-    if (Opt->getNormalCtor())
-      addPass(Passes, Opt->getNormalCtor()());
-    else
-      errs() << "llvm-ld: cannot create pass: " << Opt->getPassName() 
-             << "\n";
-  }
-
-  // The user's passes may leave cruft around. Clean up after them them but
-  // only if we haven't got DisableOptimizations set
-  if (!DisableOptimizations) {
-    addPass(Passes, createInstructionCombiningPass());
-    addPass(Passes, createCFGSimplificationPass());
-    addPass(Passes, createAggressiveDCEPass());
-    addPass(Passes, createGlobalDCEPass());
-  }
-
-  // Make sure everything is still good.
-  if (!DontVerify)
-    Passes.add(createVerifierPass());
-
-  // Run our queue of passes all at once now, efficiently.
-  Passes.run(*M);
-}
-
-}
diff --git a/tools/llvm-ld/llvm-ld.cpp b/tools/llvm-ld/llvm-ld.cpp
deleted file mode 100644
index ecf0476eb291..000000000000
--- a/tools/llvm-ld/llvm-ld.cpp
+++ /dev/null
@@ -1,732 +0,0 @@
-//===- llvm-ld.cpp - LLVM 'ld' compatible linker --------------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This utility is intended to be compatible with GCC, and follows standard
-// system 'ld' conventions.  As such, the default output file is ./a.out.
-// Additionally, this program outputs a shell script that is used to invoke LLI
-// to execute the program.  In this manner, the generated executable (a.out for
-// example), is directly executable, whereas the bitcode file actually lives in
-// the a.out.bc file generated by this program.
-//
-// Note that if someone (or a script) deletes the executable program generated,
-// the .bc file will be left around.  Considering that this is a temporary hack,
-// I'm not too worried about this.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/LinkAllVMCore.h"
-#include "llvm/Linker.h"
-#include "llvm/LLVMContext.h"
-#include "llvm/Support/Program.h"
-#include "llvm/Module.h"
-#include "llvm/PassManager.h"
-#include "llvm/Bitcode/ReaderWriter.h"
-#include "llvm/Target/TargetData.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/FileUtilities.h"
-#include "llvm/Support/ManagedStatic.h"
-#include "llvm/Support/MemoryBuffer.h"
-#include "llvm/Support/PrettyStackTrace.h"
-#include "llvm/Support/SystemUtils.h"
-#include "llvm/Support/ToolOutputFile.h"
-#include "llvm/Support/Signals.h"
-#include <memory>
-#include <cstring>
-using namespace llvm;
-
-// Rightly this should go in a header file but it just seems such a waste.
-namespace llvm {
-extern void Optimize(Module*);
-}
-
-// Input/Output Options
-static cl::list<std::string> InputFilenames(cl::Positional, cl::OneOrMore,
-  cl::desc("<input bitcode files>"));
-
-static cl::opt<std::string> OutputFilename("o", cl::init("a.out"),
-  cl::desc("Override output filename"),
-  cl::value_desc("filename"));
-
-static cl::opt<std::string> BitcodeOutputFilename("b", cl::init(""),
-  cl::desc("Override bitcode output filename"),
-  cl::value_desc("filename"));
-
-static cl::opt<bool> Verbose("v",
-  cl::desc("Print information about actions taken"));
-
-static cl::list<std::string> LibPaths("L", cl::Prefix,
-  cl::desc("Specify a library search path"),
-  cl::value_desc("directory"));
-
-static cl::list<std::string> FrameworkPaths("F", cl::Prefix,
-  cl::desc("Specify a framework search path"),
-  cl::value_desc("directory"));
-
-static cl::list<std::string> Libraries("l", cl::Prefix,
-  cl::desc("Specify libraries to link to"),
-  cl::value_desc("library prefix"));
-
-static cl::list<std::string> Frameworks("framework",
-  cl::desc("Specify frameworks to link to"),
-  cl::value_desc("framework"));
-
-// Options to control the linking, optimization, and code gen processes
-static cl::opt<bool> LinkAsLibrary("link-as-library",
-  cl::desc("Link the .bc files together as a library, not an executable"));
-
-static cl::alias Relink("r", cl::aliasopt(LinkAsLibrary),
-  cl::desc("Alias for -link-as-library"));
-
-static cl::opt<bool> Native("native",
-  cl::desc("Generate a native binary instead of a shell script"));
-
-static cl::opt<bool>NativeCBE("native-cbe",
-  cl::desc("Generate a native binary with the C backend and GCC"));
-
-static cl::list<std::string> PostLinkOpts("post-link-opts",
-  cl::value_desc("path"),
-  cl::desc("Run one or more optimization programs after linking"));
-
-static cl::list<std::string> XLinker("Xlinker", cl::value_desc("option"),
-  cl::desc("Pass options to the system linker"));
-
-// Compatibility options that llvm-ld ignores but are supported for
-// compatibility with LD
-static cl::opt<std::string> CO3("soname", cl::Hidden,
-  cl::desc("Compatibility option: ignored"));
-
-static cl::opt<std::string> CO4("version-script", cl::Hidden,
-  cl::desc("Compatibility option: ignored"));
-
-static cl::opt<bool> CO5("eh-frame-hdr", cl::Hidden,
-  cl::desc("Compatibility option: ignored"));
-
-static  cl::opt<std::string> CO6("h", cl::Hidden,
-  cl::desc("Compatibility option: ignored"));
-
-static cl::opt<bool> CO7("start-group", cl::Hidden,
-  cl::desc("Compatibility option: ignored"));
-
-static cl::opt<bool> CO8("end-group", cl::Hidden,
-  cl::desc("Compatibility option: ignored"));
-
-static cl::opt<std::string> CO9("m", cl::Hidden,
-  cl::desc("Compatibility option: ignored"));
-
-/// This is just for convenience so it doesn't have to be passed around
-/// everywhere.
-static std::string progname;
-
-/// FileRemover objects to clean up output files in the event of an error.
-static FileRemover OutputRemover;
-static FileRemover BitcodeOutputRemover;
-
-/// PrintAndExit - Prints a message to standard error and exits with error code
-///
-/// Inputs:
-///  Message  - The message to print to standard error.
-///
-static void PrintAndExit(const std::string &Message, Module *M, int errcode = 1) {
-  errs() << progname << ": " << Message << "\n";
-  delete M;
-  llvm_shutdown();
-  exit(errcode);
-}
-
-static void PrintCommand(const std::vector<const char*> &args) {
-  std::vector<const char*>::const_iterator I = args.begin(), E = args.end();
-  for (; I != E; ++I)
-    if (*I)
-      errs() << "'" << *I << "'" << " ";
-  errs() << "\n";
-}
-
-/// CopyEnv - This function takes an array of environment variables and makes a
-/// copy of it.  This copy can then be manipulated any way the caller likes
-/// without affecting the process's real environment.
-///
-/// Inputs:
-///  envp - An array of C strings containing an environment.
-///
-/// Return value:
-///  NULL - An error occurred.
-///
-///  Otherwise, a pointer to a new array of C strings is returned.  Every string
-///  in the array is a duplicate of the one in the original array (i.e. we do
-///  not copy the char *'s from one array to another).
-///
-static char ** CopyEnv(char ** const envp) {
-  // Count the number of entries in the old list;
-  unsigned entries;   // The number of entries in the old environment list
-  for (entries = 0; envp[entries] != NULL; entries++)
-    /*empty*/;
-
-  // Add one more entry for the NULL pointer that ends the list.
-  ++entries;
-
-  // If there are no entries at all, just return NULL.
-  if (entries == 0)
-    return NULL;
-
-  // Allocate a new environment list.
-  char **newenv = new char* [entries];
-  if (newenv == NULL)
-    return NULL;
-
-  // Make a copy of the list.  Don't forget the NULL that ends the list.
-  entries = 0;
-  while (envp[entries] != NULL) {
-    size_t len = strlen(envp[entries]) + 1;
-    newenv[entries] = new char[len];
-    memcpy(newenv[entries], envp[entries], len);
-    ++entries;
-  }
-  newenv[entries] = NULL;
-
-  return newenv;
-}
-
-
-/// RemoveEnv - Remove the specified environment variable from the environment
-/// array.
-///
-/// Inputs:
-///  name - The name of the variable to remove.  It cannot be NULL.
-///  envp - The array of environment variables.  It cannot be NULL.
-///
-/// Notes:
-///  This is mainly done because functions to remove items from the environment
-///  are not available across all platforms.  In particular, Solaris does not
-///  seem to have an unsetenv() function or a setenv() function (or they are
-///  undocumented if they do exist).
-///
-static void RemoveEnv(const char * name, char ** const envp) {
-  for (unsigned index=0; envp[index] != NULL; index++) {
-    // Find the first equals sign in the array and make it an EOS character.
-    char *p = strchr (envp[index], '=');
-    if (p == NULL)
-      continue;
-    else
-      *p = '\0';
-
-    // Compare the two strings.  If they are equal, zap this string.
-    // Otherwise, restore it.
-    if (!strcmp(name, envp[index]))
-      *envp[index] = '\0';
-    else
-      *p = '=';
-  }
-
-  return;
-}
-
-/// GenerateBitcode - generates a bitcode file from the module provided
-void GenerateBitcode(Module* M, const std::string& FileName) {
-
-  if (Verbose)
-    errs() << "Generating Bitcode To " << FileName << '\n';
-
-  // Create the output file.
-  std::string ErrorInfo;
-  tool_output_file Out(FileName.c_str(), ErrorInfo,
-                       raw_fd_ostream::F_Binary);
-  if (!ErrorInfo.empty()) {
-    PrintAndExit(ErrorInfo, M);
-    return;
-  }
-
-  // Write it out
-  WriteBitcodeToFile(M, Out.os());
-  Out.keep();
-}
-
-/// GenerateAssembly - generates a native assembly language source file from the
-/// specified bitcode file.
-///
-/// Inputs:
-///  InputFilename  - The name of the input bitcode file.
-///  OutputFilename - The name of the file to generate.
-///  llc            - The pathname to use for LLC.
-///  envp           - The environment to use when running LLC.
-///
-/// Return non-zero value on error.
-///
-static int GenerateAssembly(const std::string &OutputFilename,
-                            const std::string &InputFilename,
-                            const sys::Path &llc,
-                            std::string &ErrMsg ) {
-  // Run LLC to convert the bitcode file into assembly code.
-  std::vector<const char*> args;
-  args.push_back(llc.c_str());
-  // We will use GCC to assemble the program so set the assembly syntax to AT&T,
-  // regardless of what the target in the bitcode file is.
-  args.push_back("-x86-asm-syntax=att");
-  args.push_back("-o");
-  args.push_back(OutputFilename.c_str());
-  args.push_back(InputFilename.c_str());
-  args.push_back(0);
-
-  if (Verbose) {
-    errs() << "Generating Assembly With: \n";
-    PrintCommand(args);
-  }
-
-  return sys::Program::ExecuteAndWait(llc, &args[0], 0, 0, 0, 0, &ErrMsg);
-}
-
-/// GenerateCFile - generates a C source file from the specified bitcode file.
-static int GenerateCFile(const std::string &OutputFile,
-                         const std::string &InputFile,
-                         const sys::Path &llc,
-                         std::string& ErrMsg) {
-  // Run LLC to convert the bitcode file into C.
-  std::vector<const char*> args;
-  args.push_back(llc.c_str());
-  args.push_back("-march=c");
-  args.push_back("-o");
-  args.push_back(OutputFile.c_str());
-  args.push_back(InputFile.c_str());
-  args.push_back(0);
-
-  if (Verbose) {
-    errs() << "Generating C Source With: \n";
-    PrintCommand(args);
-  }
-
-  return sys::Program::ExecuteAndWait(llc, &args[0], 0, 0, 0, 0, &ErrMsg);
-}
-
-/// GenerateNative - generates a native object file from the
-/// specified bitcode file.
-///
-/// Inputs:
-///  InputFilename   - The name of the input bitcode file.
-///  OutputFilename  - The name of the file to generate.
-///  NativeLinkItems - The native libraries, files, code with which to link
-///  LibPaths        - The list of directories in which to find libraries.
-///  FrameworksPaths - The list of directories in which to find frameworks.
-///  Frameworks      - The list of frameworks (dynamic libraries)
-///  gcc             - The pathname to use for GGC.
-///  envp            - A copy of the process's current environment.
-///
-/// Outputs:
-///  None.
-///
-/// Returns non-zero value on error.
-///
-static int GenerateNative(const std::string &OutputFilename,
-                          const std::string &InputFilename,
-                          const Linker::ItemList &LinkItems,
-                          const sys::Path &gcc, char ** const envp,
-                          std::string& ErrMsg) {
-  // Remove these environment variables from the environment of the
-  // programs that we will execute.  It appears that GCC sets these
-  // environment variables so that the programs it uses can configure
-  // themselves identically.
-  //
-  // However, when we invoke GCC below, we want it to use its normal
-  // configuration.  Hence, we must sanitize its environment.
-  char ** clean_env = CopyEnv(envp);
-  if (clean_env == NULL)
-    return 1;
-  RemoveEnv("LIBRARY_PATH", clean_env);
-  RemoveEnv("COLLECT_GCC_OPTIONS", clean_env);
-  RemoveEnv("GCC_EXEC_PREFIX", clean_env);
-  RemoveEnv("COMPILER_PATH", clean_env);
-  RemoveEnv("COLLECT_GCC", clean_env);
-
-
-  // Run GCC to assemble and link the program into native code.
-  //
-  // Note:
-  //  We can't just assemble and link the file with the system assembler
-  //  and linker because we don't know where to put the _start symbol.
-  //  GCC mysteriously knows how to do it.
-  std::vector<std::string> args;
-  args.push_back(gcc.c_str());
-  args.push_back("-fno-strict-aliasing");
-  args.push_back("-O3");
-  args.push_back("-o");
-  args.push_back(OutputFilename);
-  args.push_back(InputFilename);
-
-  // Add in the library and framework paths
-  for (unsigned index = 0; index < LibPaths.size(); index++) {
-    args.push_back("-L" + LibPaths[index]);
-  }
-  for (unsigned index = 0; index < FrameworkPaths.size(); index++) {
-    args.push_back("-F" + FrameworkPaths[index]);
-  }
-
-  // Add the requested options
-  for (unsigned index = 0; index < XLinker.size(); index++)
-    args.push_back(XLinker[index]);
-
-  // Add in the libraries to link.
-  for (unsigned index = 0; index < LinkItems.size(); index++)
-    if (LinkItems[index].first != "crtend") {
-      if (LinkItems[index].second)
-        args.push_back("-l" + LinkItems[index].first);
-      else
-        args.push_back(LinkItems[index].first);
-    }
-
-  // Add in frameworks to link.
-  for (unsigned index = 0; index < Frameworks.size(); index++) {
-    args.push_back("-framework");
-    args.push_back(Frameworks[index]);
-  }
-
-  // Now that "args" owns all the std::strings for the arguments, call the c_str
-  // method to get the underlying string array.  We do this game so that the
-  // std::string array is guaranteed to outlive the const char* array.
-  std::vector<const char *> Args;
-  for (unsigned i = 0, e = args.size(); i != e; ++i)
-    Args.push_back(args[i].c_str());
-  Args.push_back(0);
-
-  if (Verbose) {
-    errs() << "Generating Native Executable With:\n";
-    PrintCommand(Args);
-  }
-
-  // Run the compiler to assembly and link together the program.
-  int R = sys::Program::ExecuteAndWait(
-    gcc, &Args[0], const_cast<const char **>(clean_env), 0, 0, 0, &ErrMsg);
-  delete [] clean_env;
-  return R;
-}
-
-/// EmitShellScript - Output the wrapper file that invokes the JIT on the LLVM
-/// bitcode file for the program.
-static void EmitShellScript(char **argv, Module *M) {
-  if (Verbose)
-    errs() << "Emitting Shell Script\n";
-#if defined(_WIN32)
-  // Windows doesn't support #!/bin/sh style shell scripts in .exe files.  To
-  // support windows systems, we copy the llvm-stub.exe executable from the
-  // build tree to the destination file.
-  std::string ErrMsg;
-  sys::Path llvmstub = PrependMainExecutablePath("llvm-stub", argv[0],
-                                                 (void *)(intptr_t)&Optimize);
-  if (llvmstub.isEmpty())
-    PrintAndExit("Could not find llvm-stub.exe executable!", M);
-
-  if (0 != sys::CopyFile(sys::Path(OutputFilename), llvmstub, &ErrMsg))
-    PrintAndExit(ErrMsg, M);
-
-  return;
-#else
-
-  // Output the script to start the program...
-  std::string ErrorInfo;
-  tool_output_file Out2(OutputFilename.c_str(), ErrorInfo);
-  if (!ErrorInfo.empty())
-    PrintAndExit(ErrorInfo, M);
-
-  Out2.os() << "#!/bin/sh\n";
-  // Allow user to setenv LLVMINTERP if lli is not in their PATH.
-  Out2.os() << "lli=${LLVMINTERP-lli}\n";
-  Out2.os() << "exec $lli \\\n";
-  // gcc accepts -l<lib> and implicitly searches /lib and /usr/lib.
-  LibPaths.push_back("/lib");
-  LibPaths.push_back("/usr/lib");
-  LibPaths.push_back("/usr/X11R6/lib");
-  // We don't need to link in libc! In fact, /usr/lib/libc.so may not be a
-  // shared object at all! See RH 8: plain text.
-  std::vector<std::string>::iterator libc =
-    std::find(Libraries.begin(), Libraries.end(), "c");
-  if (libc != Libraries.end()) Libraries.erase(libc);
-  // List all the shared object (native) libraries this executable will need
-  // on the command line, so that we don't have to do this manually!
-  for (std::vector<std::string>::iterator i = Libraries.begin(),
-         e = Libraries.end(); i != e; ++i) {
-    // try explicit -L arguments first:
-    sys::Path FullLibraryPath;
-    for (cl::list<std::string>::const_iterator P = LibPaths.begin(),
-           E = LibPaths.end(); P != E; ++P) {
-      FullLibraryPath = *P;
-      FullLibraryPath.appendComponent("lib" + *i);
-      FullLibraryPath.appendSuffix(sys::Path::GetDLLSuffix());
-      if (!FullLibraryPath.isEmpty()) {
-        if (!FullLibraryPath.isDynamicLibrary()) {
-          // Not a native shared library; mark as invalid
-          FullLibraryPath = sys::Path();
-        } else break;
-      }
-    }
-    if (FullLibraryPath.isEmpty())
-      FullLibraryPath = sys::Path::FindLibrary(*i);
-    if (!FullLibraryPath.isEmpty())
-      Out2.os() << "    -load=" << FullLibraryPath.str() << " \\\n";
-  }
-  Out2.os() << "    "  << BitcodeOutputFilename << " ${1+\"$@\"}\n";
-  Out2.keep();
-#endif
-}
-
-// BuildLinkItems -- This function generates a LinkItemList for the LinkItems
-// linker function by combining the Files and Libraries in the order they were
-// declared on the command line.
-static void BuildLinkItems(
-  Linker::ItemList& Items,
-  const cl::list<std::string>& Files,
-  const cl::list<std::string>& Libraries) {
-
-  // Build the list of linkage items for LinkItems.
-
-  cl::list<std::string>::const_iterator fileIt = Files.begin();
-  cl::list<std::string>::const_iterator libIt  = Libraries.begin();
-
-  int libPos = -1, filePos = -1;
-  while ( libIt != Libraries.end() || fileIt != Files.end() ) {
-    if (libIt != Libraries.end())
-      libPos = Libraries.getPosition(libIt - Libraries.begin());
-    else
-      libPos = -1;
-    if (fileIt != Files.end())
-      filePos = Files.getPosition(fileIt - Files.begin());
-    else
-      filePos = -1;
-
-    if (filePos != -1 && (libPos == -1 || filePos < libPos)) {
-      // Add a source file
-      Items.push_back(std::make_pair(*fileIt++, false));
-    } else if (libPos != -1 && (filePos == -1 || libPos < filePos)) {
-      // Add a library
-      Items.push_back(std::make_pair(*libIt++, true));
-    }
-  }
-}
-
-int main(int argc, char **argv, char **envp) {
-  // Print a stack trace if we signal out.
-  sys::PrintStackTraceOnErrorSignal();
-  PrettyStackTraceProgram X(argc, argv);
-
-  LLVMContext &Context = getGlobalContext();
-  llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.
-
-  // Initialize passes
-  PassRegistry &Registry = *PassRegistry::getPassRegistry();
-  initializeCore(Registry);
-  initializeScalarOpts(Registry);
-  initializeIPO(Registry);
-  initializeAnalysis(Registry);
-  initializeIPA(Registry);
-  initializeTransformUtils(Registry);
-  initializeInstCombine(Registry);
-  initializeTarget(Registry);
-
-  // Initial global variable above for convenience printing of program name.
-  progname = sys::path::stem(argv[0]);
-
-  // Parse the command line options
-  cl::ParseCommandLineOptions(argc, argv, "llvm linker\n");
-
-#if defined(_WIN32) || defined(__CYGWIN__)
-  if (!LinkAsLibrary) {
-    // Default to "a.exe" instead of "a.out".
-    if (OutputFilename.getNumOccurrences() == 0)
-      OutputFilename = "a.exe";
-
-    // If there is no suffix add an "exe" one.
-    if (sys::path::extension(OutputFilename).empty())
-      OutputFilename.append(".exe");
-  }
-#endif
-
-  // Generate the bitcode for the optimized module.
-  // If -b wasn't specified, use the name specified
-  // with -o to construct BitcodeOutputFilename.
-  if (BitcodeOutputFilename.empty()) {
-    BitcodeOutputFilename = OutputFilename;
-    if (!LinkAsLibrary) BitcodeOutputFilename += ".bc";
-  }
-
-  // Arrange for the bitcode output file to be deleted on any errors.
-  BitcodeOutputRemover.setFile(BitcodeOutputFilename);
-  sys::RemoveFileOnSignal(sys::Path(BitcodeOutputFilename));
-
-  // Arrange for the output file to be deleted on any errors.
-  if (!LinkAsLibrary) {
-    OutputRemover.setFile(OutputFilename);
-    sys::RemoveFileOnSignal(sys::Path(OutputFilename));
-  }
-
-  // Construct a Linker (now that Verbose is set)
-  Linker TheLinker(progname, OutputFilename, Context, Verbose);
-
-  // Keep track of the native link items (versus the bitcode items)
-  Linker::ItemList NativeLinkItems;
-
-  // Add library paths to the linker
-  TheLinker.addPaths(LibPaths);
-  TheLinker.addSystemPaths();
-
-  // Remove any consecutive duplicates of the same library...
-  Libraries.erase(std::unique(Libraries.begin(), Libraries.end()),
-                  Libraries.end());
-
-  if (LinkAsLibrary) {
-    std::vector<sys::Path> Files;
-    for (unsigned i = 0; i < InputFilenames.size(); ++i )
-      Files.push_back(sys::Path(InputFilenames[i]));
-    if (TheLinker.LinkInFiles(Files))
-      return 1; // Error already printed
-
-    // The libraries aren't linked in but are noted as "dependent" in the
-    // module.
-    for (cl::list<std::string>::const_iterator I = Libraries.begin(),
-         E = Libraries.end(); I != E ; ++I) {
-      TheLinker.getModule()->addLibrary(*I);
-    }
-  } else {
-    // Build a list of the items from our command line
-    Linker::ItemList Items;
-    BuildLinkItems(Items, InputFilenames, Libraries);
-
-    // Link all the items together
-    if (TheLinker.LinkInItems(Items, NativeLinkItems) )
-      return 1; // Error already printed
-  }
-
-  std::auto_ptr<Module> Composite(TheLinker.releaseModule());
-
-  // Optimize the module
-  Optimize(Composite.get());
-
-  // Generate the bitcode output.
-  GenerateBitcode(Composite.get(), BitcodeOutputFilename);
-
-  // If we are not linking a library, generate either a native executable
-  // or a JIT shell script, depending upon what the user wants.
-  if (!LinkAsLibrary) {
-    // If the user wants to run a post-link optimization, run it now.
-    if (!PostLinkOpts.empty()) {
-      std::vector<std::string> opts = PostLinkOpts;
-      for (std::vector<std::string>::iterator I = opts.begin(),
-           E = opts.end(); I != E; ++I) {
-        sys::Path prog(*I);
-        if (!prog.canExecute()) {
-          prog = sys::Program::FindProgramByName(*I);
-          if (prog.isEmpty())
-            PrintAndExit(std::string("Optimization program '") + *I +
-                         "' is not found or not executable.", Composite.get());
-        }
-        // Get the program arguments
-        sys::Path tmp_output("opt_result");
-        std::string ErrMsg;
-        if (tmp_output.createTemporaryFileOnDisk(true, &ErrMsg))
-          PrintAndExit(ErrMsg, Composite.get());
-
-        const char* args[4];
-        args[0] = I->c_str();
-        args[1] = BitcodeOutputFilename.c_str();
-        args[2] = tmp_output.c_str();
-        args[3] = 0;
-        if (0 == sys::Program::ExecuteAndWait(prog, args, 0,0,0,0, &ErrMsg)) {
-          if (tmp_output.isBitcodeFile()) {
-            sys::Path target(BitcodeOutputFilename);
-            target.eraseFromDisk();
-            if (tmp_output.renamePathOnDisk(target, &ErrMsg))
-              PrintAndExit(ErrMsg, Composite.get(), 2);
-          } else
-            PrintAndExit("Post-link optimization output is not bitcode",
-                         Composite.get());
-        } else {
-          PrintAndExit(ErrMsg, Composite.get());
-        }
-      }
-    }
-
-    // If the user wants to generate a native executable, compile it from the
-    // bitcode file.
-    //
-    // Otherwise, create a script that will run the bitcode through the JIT.
-    if (Native) {
-      // Name of the Assembly Language output file
-      sys::Path AssemblyFile ( OutputFilename);
-      AssemblyFile.appendSuffix("s");
-
-      // Mark the output files for removal.
-      FileRemover AssemblyFileRemover(AssemblyFile.str());
-      sys::RemoveFileOnSignal(AssemblyFile);
-
-      // Determine the locations of the llc and gcc programs.
-      sys::Path llc = PrependMainExecutablePath("llc", argv[0],
-                                                (void *)(intptr_t)&Optimize);
-      if (llc.isEmpty())
-        PrintAndExit("Failed to find llc", Composite.get());
-
-      sys::Path gcc = sys::Program::FindProgramByName("gcc");
-      if (gcc.isEmpty())
-        PrintAndExit("Failed to find gcc", Composite.get());
-
-      // Generate an assembly language file for the bitcode.
-      std::string ErrMsg;
-      if (0 != GenerateAssembly(AssemblyFile.str(), BitcodeOutputFilename,
-          llc, ErrMsg))
-        PrintAndExit(ErrMsg, Composite.get());
-
-      if (0 != GenerateNative(OutputFilename, AssemblyFile.str(),
-                              NativeLinkItems, gcc, envp, ErrMsg))
-        PrintAndExit(ErrMsg, Composite.get());
-    } else if (NativeCBE) {
-      sys::Path CFile (OutputFilename);
-      CFile.appendSuffix("cbe.c");
-
-      // Mark the output files for removal.
-      FileRemover CFileRemover(CFile.str());
-      sys::RemoveFileOnSignal(CFile);
-
-      // Determine the locations of the llc and gcc programs.
-      sys::Path llc = PrependMainExecutablePath("llc", argv[0],
-                                                (void *)(intptr_t)&Optimize);
-      if (llc.isEmpty())
-        PrintAndExit("Failed to find llc", Composite.get());
-
-      sys::Path gcc = sys::Program::FindProgramByName("gcc");
-      if (gcc.isEmpty())
-        PrintAndExit("Failed to find gcc", Composite.get());
-
-      // Generate an assembly language file for the bitcode.
-      std::string ErrMsg;
-      if (GenerateCFile(CFile.str(), BitcodeOutputFilename, llc, ErrMsg))
-        PrintAndExit(ErrMsg, Composite.get());
-
-      if (GenerateNative(OutputFilename, CFile.str(),
-                         NativeLinkItems, gcc, envp, ErrMsg))
-        PrintAndExit(ErrMsg, Composite.get());
-    } else {
-      EmitShellScript(argv, Composite.get());
-    }
-
-    // Make the script executable...
-    std::string ErrMsg;
-    if (sys::Path(OutputFilename).makeExecutableOnDisk(&ErrMsg))
-      PrintAndExit(ErrMsg, Composite.get());
-
-    // Make the bitcode file readable and directly executable in LLEE as well
-    if (sys::Path(BitcodeOutputFilename).makeExecutableOnDisk(&ErrMsg))
-      PrintAndExit(ErrMsg, Composite.get());
-
-    if (sys::Path(BitcodeOutputFilename).makeReadableOnDisk(&ErrMsg))
-      PrintAndExit(ErrMsg, Composite.get());
-  }
-
-  // Operations which may fail are now complete.
-  BitcodeOutputRemover.releaseFile();
-  if (!LinkAsLibrary)
-    OutputRemover.releaseFile();
-
-  // Graceful exit
-  return 0;
-}
diff --git a/tools/llvm-mc/llvm-mc.cpp b/tools/llvm-mc/llvm-mc.cpp
index 36a482e908cd..3bceb1462416 100644
--- a/tools/llvm-mc/llvm-mc.cpp
+++ b/tools/llvm-mc/llvm-mc.cpp
@@ -180,38 +180,16 @@ static const Target *GetTarget(const char *ProgName) {
     TripleName = sys::getDefaultTargetTriple();
   Triple TheTriple(Triple::normalize(TripleName));
 
-  const Target *TheTarget = 0;
-  if (!ArchName.empty()) {
-    for (TargetRegistry::iterator it = TargetRegistry::begin(),
-           ie = TargetRegistry::end(); it != ie; ++it) {
-      if (ArchName == it->getName()) {
-        TheTarget = &*it;
-        break;
-      }
-    }
-
-    if (!TheTarget) {
-      errs() << ProgName << ": error: invalid target '" << ArchName << "'.\n";
-      return 0;
-    }
-
-    // Adjust the triple to match (if known), otherwise stick with the
-    // module/host triple.
-    Triple::ArchType Type = Triple::getArchTypeForLLVMName(ArchName);
-    if (Type != Triple::UnknownArch)
-      TheTriple.setArch(Type);
-  } else {
-    // Get the target specific parser.
-    std::string Error;
-    TheTarget = TargetRegistry::lookupTarget(TheTriple.getTriple(), Error);
-    if (TheTarget == 0) {
-      errs() << ProgName << ": error: unable to get target for '"
-             << TheTriple.getTriple()
-             << "', see --version and --triple.\n";
-      return 0;
-    }
+  // Get the target specific parser.
+  std::string Error;
+  const Target *TheTarget = TargetRegistry::lookupTarget(ArchName, TheTriple,
+                                                         Error);
+  if (!TheTarget) {
+    errs() << ProgName << ": " << Error;
+    return 0;
   }
 
+  // Update the triple name and return the found target.
   TripleName = TheTriple.getTriple();
   return TheTarget;
 }
@@ -430,7 +408,7 @@ int main(int argc, char **argv) {
     MCCodeEmitter *CE = 0;
     MCAsmBackend *MAB = 0;
     if (ShowEncoding) {
-      CE = TheTarget->createMCCodeEmitter(*MCII, *STI, Ctx);
+      CE = TheTarget->createMCCodeEmitter(*MCII, *MRI, *STI, Ctx);
       MAB = TheTarget->createMCAsmBackend(TripleName);
     }
     Str.reset(TheTarget->createAsmStreamer(Ctx, FOS, /*asmverbose*/true,
@@ -443,7 +421,7 @@ int main(int argc, char **argv) {
     Str.reset(createNullStreamer(Ctx));
   } else {
     assert(FileType == OFT_ObjectFile && "Invalid file type!");
-    MCCodeEmitter *CE = TheTarget->createMCCodeEmitter(*MCII, *STI, Ctx);
+    MCCodeEmitter *CE = TheTarget->createMCCodeEmitter(*MCII, *MRI, *STI, Ctx);
     MCAsmBackend *MAB = TheTarget->createMCAsmBackend(TripleName);
     Str.reset(TheTarget->createMCObjectStreamer(TripleName, Ctx, *MAB,
                                                 FOS, CE, RelaxAll,
diff --git a/tools/llvm-nm/llvm-nm.cpp b/tools/llvm-nm/llvm-nm.cpp
index 8d9e51e56ebd..9afbd4db90c3 100644
--- a/tools/llvm-nm/llvm-nm.cpp
+++ b/tools/llvm-nm/llvm-nm.cpp
@@ -7,12 +7,12 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// This program is a utility that works like traditional Unix "nm",
-// that is, it prints out the names of symbols in a bitcode file,
-// along with some information about each symbol.
+// This program is a utility that works like traditional Unix "nm", that is, it
+// prints out the names of symbols in a bitcode or object file, along with some
+// information about each symbol.
 //
-// This "nm" does not print symbols' addresses. It supports many of
-// the features of GNU "nm", including its different output formats.
+// This "nm" supports many of the features of GNU "nm", including its different
+// output formats.
 //
 //===----------------------------------------------------------------------===//
 
diff --git a/tools/llvm-objdump/MachODump.cpp b/tools/llvm-objdump/MachODump.cpp
index 0e7f3fdebebc..1feea421f23a 100644
--- a/tools/llvm-objdump/MachODump.cpp
+++ b/tools/llvm-objdump/MachODump.cpp
@@ -44,7 +44,7 @@ using namespace object;
 
 static cl::opt<bool>
   CFG("cfg", cl::desc("Create a CFG for every symbol in the object file and"
-                      "write it to a graphviz file (MachO-only)"));
+                      " write it to a graphviz file (MachO-only)"));
 
 static cl::opt<bool>
   UseDbg("g", cl::desc("Print line information from debug info if available"));
@@ -286,8 +286,10 @@ void llvm::DisassembleInputMachO(StringRef Filename) {
 
   // Read and register the symbol table data.
   InMemoryStruct<macho::SymtabLoadCommand> SymtabLC;
-  MachOObj->ReadSymtabLoadCommand(*SymtabLCI, SymtabLC);
-  MachOObj->RegisterStringTable(*SymtabLC);
+  if (SymtabLCI) {
+    MachOObj->ReadSymtabLoadCommand(*SymtabLCI, SymtabLC);
+    MachOObj->RegisterStringTable(*SymtabLC);
+  }
 
   std::vector<SectionRef> Sections;
   std::vector<SymbolRef> Symbols;
@@ -430,7 +432,7 @@ void llvm::DisassembleInputMachO(StringRef Filename) {
 
       // Stop disassembling either at the beginning of the next symbol or at
       // the end of the section.
-      bool containsNextSym = true;
+      bool containsNextSym = false;
       uint64_t NextSym = 0;
       uint64_t NextSymIdx = SymIdx+1;
       while (Symbols.size() > NextSymIdx) {
@@ -498,6 +500,29 @@ void llvm::DisassembleInputMachO(StringRef Filename) {
             InstrAnalysis.get(), Start, DebugOut, FunctionMap, Functions);
       }
     }
+    if (!CFG && !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);
+      uint64_t InstSize;
+      for (uint64_t Index = 0; Index < SectSize; Index += InstSize) {
+        MCInst Inst;
+
+        if (DisAsm->getInstruction(Inst, InstSize, memoryObject, Index,
+                                   DebugOut, nulls())) {
+          outs() << format("%8" PRIx64 ":\t", SectAddress + Index);
+          DumpBytes(StringRef(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
+        }
+      }
+    }
 
     if (CFG) {
       if (!symbolTableWorked) {
diff --git a/tools/llvm-objdump/llvm-objdump.cpp b/tools/llvm-objdump/llvm-objdump.cpp
index 5a6f94a1c281..b431c7638d75 100644
--- a/tools/llvm-objdump/llvm-objdump.cpp
+++ b/tools/llvm-objdump/llvm-objdump.cpp
@@ -104,29 +104,27 @@ static bool error(error_code ec) {
   return true;
 }
 
-static const Target *GetTarget(const ObjectFile *Obj = NULL) {
+static const Target *getTarget(const ObjectFile *Obj = NULL) {
   // Figure out the target triple.
-  llvm::Triple TT("unknown-unknown-unknown");
+  llvm::Triple TheTriple("unknown-unknown-unknown");
   if (TripleName.empty()) {
     if (Obj)
-      TT.setArch(Triple::ArchType(Obj->getArch()));
+      TheTriple.setArch(Triple::ArchType(Obj->getArch()));
   } else
-    TT.setTriple(Triple::normalize(TripleName));
-
-  if (!ArchName.empty())
-    TT.setArchName(ArchName);
-
-  TripleName = TT.str();
+    TheTriple.setTriple(Triple::normalize(TripleName));
 
   // Get the target specific parser.
   std::string Error;
-  const Target *TheTarget = TargetRegistry::lookupTarget(TripleName, Error);
-  if (TheTarget)
-    return TheTarget;
+  const Target *TheTarget = TargetRegistry::lookupTarget(ArchName, TheTriple,
+                                                         Error);
+  if (!TheTarget) {
+    errs() << ToolName << ": " << Error;
+    return 0;
+  }
 
-  errs() << ToolName << ": error: unable to get target for '" << TripleName
-         << "', see --version and --triple.\n";
-  return 0;
+  // Update the triple name and return the found target.
+  TripleName = TheTriple.getTriple();
+  return TheTarget;
 }
 
 void llvm::StringRefMemoryObject::anchor() { }
@@ -165,11 +163,11 @@ static bool RelocAddressLess(RelocationRef a, RelocationRef b) {
 }
 
 static void DisassembleObject(const ObjectFile *Obj, bool InlineRelocs) {
-  const Target *TheTarget = GetTarget(Obj);
-  if (!TheTarget) {
-    // GetTarget prints out stuff.
+  const Target *TheTarget = getTarget(Obj);
+  // getTarget() will have already issued a diagnostic if necessary, so
+  // just bail here if it failed.
+  if (!TheTarget)
     return;
-  }
 
   error_code ec;
   for (section_iterator i = Obj->begin_sections(),
@@ -208,7 +206,7 @@ static void DisassembleObject(const ObjectFile *Obj, bool InlineRelocs) {
     if (InlineRelocs) {
       for (relocation_iterator ri = i->begin_relocations(),
                                re = i->end_relocations();
-                              ri != re; ri.increment(ec)) {
+                               ri != re; ri.increment(ec)) {
         if (error(ec)) break;
         Rels.push_back(*ri);
       }
@@ -465,9 +463,8 @@ static void PrintCOFFSymbolTable(const COFFObjectFile *coff) {
                << format("assoc %d comdat %d\n"
                          , unsigned(asd->Number)
                          , unsigned(asd->Selection));
-      } else {
+      } else
         outs() << "AUX Unknown\n";
-      }
     } else {
       StringRef name;
       if (error(coff->getSymbol(i, symbol))) return;
@@ -611,13 +608,12 @@ static void DumpInput(StringRef file) {
     return;
   }
 
-  if (Archive *a = dyn_cast<Archive>(binary.get())) {
+  if (Archive *a = dyn_cast<Archive>(binary.get()))
     DumpArchive(a);
-  } else if (ObjectFile *o = dyn_cast<ObjectFile>(binary.get())) {
+  else if (ObjectFile *o = dyn_cast<ObjectFile>(binary.get()))
     DumpObject(o);
-  } else {
+  else
     errs() << ToolName << ": '" << file << "': " << "Unrecognized file type.\n";
-  }
 }
 
 int main(int argc, char **argv) {
@@ -632,6 +628,9 @@ int main(int argc, char **argv) {
   llvm::InitializeAllAsmParsers();
   llvm::InitializeAllDisassemblers();
 
+  // Register the target printer for --version.
+  cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion);
+
   cl::ParseCommandLineOptions(argc, argv, "llvm object file dumper\n");
   TripleName = Triple::normalize(TripleName);
 
diff --git a/tools/llvm-prof/llvm-prof.cpp b/tools/llvm-prof/llvm-prof.cpp
index d9b671336407..81e9503abe25 100644
--- a/tools/llvm-prof/llvm-prof.cpp
+++ b/tools/llvm-prof/llvm-prof.cpp
@@ -281,7 +281,7 @@ int main(int argc, char **argv) {
   // using the standard profile info provider pass, but for now this gives us
   // access to additional information not exposed via the ProfileInfo
   // interface.
-  ProfileInfoLoader PIL(argv[0], ProfileDataFile, *M);
+  ProfileInfoLoader PIL(argv[0], ProfileDataFile);
 
   // Run the printer pass.
   PassManager PassMgr;
diff --git a/tools/llvm-ranlib/llvm-ranlib.cpp b/tools/llvm-ranlib/llvm-ranlib.cpp
index 64f795f7f63d..4006765a9c2b 100644
--- a/tools/llvm-ranlib/llvm-ranlib.cpp
+++ b/tools/llvm-ranlib/llvm-ranlib.cpp
@@ -81,7 +81,7 @@ int main(int argc, char **argv) {
     if (!TheArchive)
       throw err_msg;
 
-    if (TheArchive->writeToDisk(true, false, false, &err_msg ))
+    if (TheArchive->writeToDisk(true, false, &err_msg ))
       throw err_msg;
 
     if (Verbose)
diff --git a/tools/llvm-rtdyld/llvm-rtdyld.cpp b/tools/llvm-rtdyld/llvm-rtdyld.cpp
index 01a7d1580786..95de8d8a4d53 100644
--- a/tools/llvm-rtdyld/llvm-rtdyld.cpp
+++ b/tools/llvm-rtdyld/llvm-rtdyld.cpp
@@ -63,18 +63,37 @@ public:
     return 0;
   }
 
+  // Invalidate instruction cache for sections with execute permissions.
+  // Some platforms with separate data cache and instruction cache require
+  // explicit cache flush, otherwise JIT code manipulations (like resolved
+  // relocations) will get to the data cache but not to the instruction cache.
+  virtual void invalidateInstructionCache();
 };
 
 uint8_t *TrivialMemoryManager::allocateCodeSection(uintptr_t Size,
                                                    unsigned Alignment,
                                                    unsigned SectionID) {
-  return (uint8_t*)sys::Memory::AllocateRWX(Size, 0, 0).base();
+  sys::MemoryBlock MB = sys::Memory::AllocateRWX(Size, 0, 0);
+  FunctionMemory.push_back(MB);
+  return (uint8_t*)MB.base();
 }
 
 uint8_t *TrivialMemoryManager::allocateDataSection(uintptr_t Size,
                                                    unsigned Alignment,
                                                    unsigned SectionID) {
-  return (uint8_t*)sys::Memory::AllocateRWX(Size, 0, 0).base();
+  sys::MemoryBlock MB = sys::Memory::AllocateRWX(Size, 0, 0);
+  DataMemory.push_back(MB);
+  return (uint8_t*)MB.base();
+}
+
+void TrivialMemoryManager::invalidateInstructionCache() {
+  for (int i = 0, e = FunctionMemory.size(); i != e; ++i)
+    sys::Memory::InvalidateInstructionCache(FunctionMemory[i].base(),
+                                            FunctionMemory[i].size());
+
+  for (int i = 0, e = DataMemory.size(); i != e; ++i)
+    sys::Memory::InvalidateInstructionCache(DataMemory[i].base(),
+                                            DataMemory[i].size());
 }
 
 static const char *ProgramName;
@@ -113,6 +132,8 @@ static int executeInput() {
 
   // Resolve all the relocations we can.
   Dyld.resolveRelocations();
+  // Clear instruction cache before code will be executed.
+  MemMgr->invalidateInstructionCache();
 
   // FIXME: Error out if there are unresolved relocations.
 
diff --git a/tools/llvm-shlib/Makefile b/tools/llvm-shlib/Makefile
index 75bee07d171d..6d6c6e9f14be 100644
--- a/tools/llvm-shlib/Makefile
+++ b/tools/llvm-shlib/Makefile
@@ -63,7 +63,7 @@ ifeq ($(HOST_OS),Darwin)
     endif
 endif
 
-ifeq ($(HOST_OS), $(filter $(HOST_OS), Linux FreeBSD OpenBSD GNU))
+ifeq ($(HOST_OS), $(filter $(HOST_OS), Linux FreeBSD OpenBSD GNU Bitrig))
     # Include everything from the .a's into the shared library.
     LLVMLibsOptions := -Wl,--whole-archive $(LLVMLibsOptions) \
                        -Wl,--no-whole-archive
diff --git a/tools/llvm-stress/llvm-stress.cpp b/tools/llvm-stress/llvm-stress.cpp
index fb05a589e8b7..31252dd7f777 100644
--- a/tools/llvm-stress/llvm-stress.cpp
+++ b/tools/llvm-stress/llvm-stress.cpp
@@ -82,6 +82,12 @@ public:
     uint64_t Val = Rand32();
     return Val | (uint64_t(Rand32()) << 32);
   }
+
+  /// Rand operator for STL algorithms.
+  ptrdiff_t operator()(ptrdiff_t y) {
+    return  Rand64() % y;
+  }
+
 private:
   unsigned Seed;
 };
@@ -599,15 +605,13 @@ struct CmpModifier: public Modifier {
   }
 };
 
-void FillFunction(Function *F) {
+void FillFunction(Function *F, Random &R) {
   // Create a legal entry block.
   BasicBlock *BB = BasicBlock::Create(F->getContext(), "BB", F);
   ReturnInst::Create(F->getContext(), BB);
 
   // Create the value table.
   Modifier::PieceTable PT;
-  // Pick an initial seed value
-  Random R(SeedCL);
 
   // Consider arguments as legal values.
   for (Function::arg_iterator it = F->arg_begin(), e = F->arg_end();
@@ -648,15 +652,17 @@ void FillFunction(Function *F) {
   SM->ActN(5); // Throw in a few stores.
 }
 
-void IntroduceControlFlow(Function *F) {
-  std::set<Instruction*> BoolInst;
+void IntroduceControlFlow(Function *F, Random &R) {
+  std::vector<Instruction*> BoolInst;
   for (BasicBlock::iterator it = F->begin()->begin(),
        e = F->begin()->end(); it != e; ++it) {
     if (it->getType() == IntegerType::getInt1Ty(F->getContext()))
-      BoolInst.insert(it);
+      BoolInst.push_back(it);
   }
 
-  for (std::set<Instruction*>::iterator it = BoolInst.begin(),
+  std::random_shuffle(BoolInst.begin(), BoolInst.end(), R);
+
+  for (std::vector<Instruction*>::iterator it = BoolInst.begin(),
        e = BoolInst.end(); it != e; ++it) {
     Instruction *Instr = *it;
     BasicBlock *Curr = Instr->getParent();
@@ -678,8 +684,13 @@ int main(int argc, char **argv) {
 
   std::auto_ptr<Module> M(new Module("/tmp/autogen.bc", getGlobalContext()));
   Function *F = GenEmptyFunction(M.get());
-  FillFunction(F);
-  IntroduceControlFlow(F);
+
+  // Pick an initial seed value
+  Random R(SeedCL);
+  // Generate lots of random instructions inside a single basic block.
+  FillFunction(F, R);
+  // Break the basic block into many loops.
+  IntroduceControlFlow(F, R);
 
   // Figure out what stream we are supposed to write to...
   OwningPtr<tool_output_file> Out;
diff --git a/tools/llvm-stub/CMakeLists.txt b/tools/llvm-stub/CMakeLists.txt
deleted file mode 100644
index a98dc9ed49a9..000000000000
--- a/tools/llvm-stub/CMakeLists.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-add_llvm_tool(llvm-stub
-  llvm-stub.c
-  )
diff --git a/tools/llvm-stub/LLVMBuild.txt b/tools/llvm-stub/LLVMBuild.txt
deleted file mode 100644
index 5c3534c106e5..000000000000
--- a/tools/llvm-stub/LLVMBuild.txt
+++ /dev/null
@@ -1,22 +0,0 @@
-;===- ./tools/llvm-stub/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-stub
-parent = Tools
-required_libraries = 
diff --git a/tools/llvm-stub/Makefile b/tools/llvm-stub/Makefile
deleted file mode 100644
index 077efa2d02f1..000000000000
--- a/tools/llvm-stub/Makefile
+++ /dev/null
@@ -1,15 +0,0 @@
-##===- tools/llvm-stub/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-stub
-LINK_COMPONENTS := object
-
-include $(LEVEL)/Makefile.common
-
diff --git a/tools/llvm-stub/llvm-stub.c b/tools/llvm-stub/llvm-stub.c
deleted file mode 100644
index 69cd6edbec57..000000000000
--- a/tools/llvm-stub/llvm-stub.c
+++ /dev/null
@@ -1,77 +0,0 @@
-/*===- llvm-stub.c - Stub executable to run llvm bitcode files ------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This tool is used by the gccld program to enable transparent execution of
-// bitcode files by the user.  Specifically, gccld outputs two files when asked
-// to compile a <program> file:
-//    1. It outputs the LLVM bitcode file to <program>.bc
-//    2. It outputs a stub executable that runs lli on <program>.bc
-//
-// This allows the end user to just say ./<program> and have the JIT executed
-// automatically.  On unix, the stub executable emitted is actually a bourne
-// shell script that does the forwarding.  Windows does not like #!/bin/sh
-// programs in .exe files, so we make it an actual program, defined here.
-//
-//===----------------------------------------------------------------------===*/
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "llvm/Config/config.h"
-
-#if defined(HAVE_UNISTD_H) && !defined(_MSC_VER)
-#include <unistd.h>
-#endif
-
-#ifdef _WIN32
-#include <process.h>
-#include <io.h>
-#endif
-
-int main(int argc, char** argv) {
-  const char *Interp = getenv("LLVMINTERP");
-  const char **Args;
-  if (Interp == 0) Interp = "lli";
-
-  /* Set up the command line options to pass to the JIT. */
-  Args = (const char**)malloc(sizeof(char*) * (argc+2));
-  /* argv[0] is the JIT */
-  Args[0] = Interp;
-
-#ifdef LLVM_ON_WIN32
-  {
-    int len = strlen(argv[0]);
-    if (len < 4 || strcmp(argv[0] + len - 4, ".exe") != 0) {
-      /* .exe suffix is stripped off of argv[0] if the executable was run on the
-       * command line without one. Put it back on.
-       */
-      argv[0] = strcat(strcpy((char*)malloc(len + 5), argv[0]), ".exe");
-    }
-  }
-#endif
-
-  /* argv[1] is argv[0] + ".bc". */
-  Args[1] = strcat(strcpy((char*)malloc(strlen(argv[0])+4), argv[0]), ".bc");
-
-  /* The rest of the args are as before. */
-  memcpy((char **)Args+2, argv+1, sizeof(char*)*argc);
-
-  /* Run the JIT. */
-#if !defined(_WIN32) || defined(__MINGW64__)
-  execvp(Interp, (char **)Args); /* POSIX execvp takes a char *const[]. */
-#else
-  execvp(Interp, Args); /* windows execvp takes a const char *const *. */
-#endif
-  /* if _execv returns, the JIT could not be started. */
-  fprintf(stderr, "Could not execute the LLVM JIT.  Either add 'lli' to your"
-          " path, or set the\ninterpreter you want to use in the LLVMINTERP "
-          "environment variable.\n");
-  return 1;
-}
diff --git a/tools/lto/LTOCodeGenerator.cpp b/tools/lto/LTOCodeGenerator.cpp
index 6382a3f219e6..b80bc34a231d 100644
--- a/tools/lto/LTOCodeGenerator.cpp
+++ b/tools/lto/LTOCodeGenerator.cpp
@@ -46,10 +46,12 @@
 #include "llvm/ADT/StringExtras.h"
 using namespace llvm;
 
-static cl::opt<bool> DisableInline("disable-inlining", cl::init(false),
+static cl::opt<bool>
+DisableInline("disable-inlining", cl::init(false),
   cl::desc("Do not run the inliner pass"));
 
-static cl::opt<bool> DisableGVNLoadPRE("disable-gvn-loadpre", cl::init(false),
+static cl::opt<bool>
+DisableGVNLoadPRE("disable-gvn-loadpre", cl::init(false),
   cl::desc("Do not run the GVN load PRE pass"));
 
 const char* LTOCodeGenerator::getVersionString() {
@@ -152,7 +154,7 @@ bool LTOCodeGenerator::writeMergedModules(const char *path,
 bool LTOCodeGenerator::compile_to_file(const char** name, std::string& errMsg) {
   // make unique temp .o file to put generated object file
   sys::PathWithStatus uniqueObjPath("lto-llvm.o");
-  if ( uniqueObjPath.createTemporaryFileOnDisk(false, &errMsg) ) {
+  if (uniqueObjPath.createTemporaryFileOnDisk(false, &errMsg)) {
     uniqueObjPath.eraseFromDisk();
     return true;
   }
@@ -172,7 +174,7 @@ bool LTOCodeGenerator::compile_to_file(const char** name, std::string& errMsg) {
   }
 
   objFile.keep();
-  if ( genResult ) {
+  if (genResult) {
     uniqueObjPath.eraseFromDisk();
     return true;
   }
@@ -202,46 +204,49 @@ const void* LTOCodeGenerator::compile(size_t* length, std::string& errMsg) {
   sys::Path(_nativeObjectPath).eraseFromDisk();
 
   // return buffer, unless error
-  if ( _nativeObjectFile == NULL )
+  if (_nativeObjectFile == NULL)
     return NULL;
   *length = _nativeObjectFile->getBufferSize();
   return _nativeObjectFile->getBufferStart();
 }
 
 bool LTOCodeGenerator::determineTarget(std::string& errMsg) {
-  if ( _target == NULL ) {
-    std::string Triple = _linker.getModule()->getTargetTriple();
-    if (Triple.empty())
-      Triple = sys::getDefaultTargetTriple();
-
-    // create target machine from info for merged modules
-    const Target *march = TargetRegistry::lookupTarget(Triple, errMsg);
-    if ( march == NULL )
-      return true;
-
-    // The relocation model is actually a static member of TargetMachine and
-    // needs to be set before the TargetMachine is instantiated.
-    Reloc::Model RelocModel = Reloc::Default;
-    switch( _codeModel ) {
-    case LTO_CODEGEN_PIC_MODEL_STATIC:
-      RelocModel = Reloc::Static;
-      break;
-    case LTO_CODEGEN_PIC_MODEL_DYNAMIC:
-      RelocModel = Reloc::PIC_;
-      break;
-    case LTO_CODEGEN_PIC_MODEL_DYNAMIC_NO_PIC:
-      RelocModel = Reloc::DynamicNoPIC;
-      break;
-    }
-
-    // construct LTOModule, hand over ownership of module and target
-    SubtargetFeatures Features;
-    Features.getDefaultSubtargetFeatures(llvm::Triple(Triple));
-    std::string FeatureStr = Features.getString();
-    TargetOptions Options;
-    _target = march->createTargetMachine(Triple, _mCpu, FeatureStr, Options,
-                                         RelocModel);
+  if (_target != NULL)
+    return false;
+
+  std::string Triple = _linker.getModule()->getTargetTriple();
+  if (Triple.empty())
+    Triple = sys::getDefaultTargetTriple();
+
+  // create target machine from info for merged modules
+  const Target *march = TargetRegistry::lookupTarget(Triple, errMsg);
+  if (march == NULL)
+    return true;
+
+  // The relocation model is actually a static member of TargetMachine and
+  // needs to be set before the TargetMachine is instantiated.
+  Reloc::Model RelocModel = Reloc::Default;
+  switch (_codeModel) {
+  case LTO_CODEGEN_PIC_MODEL_STATIC:
+    RelocModel = Reloc::Static;
+    break;
+  case LTO_CODEGEN_PIC_MODEL_DYNAMIC:
+    RelocModel = Reloc::PIC_;
+    break;
+  case LTO_CODEGEN_PIC_MODEL_DYNAMIC_NO_PIC:
+    RelocModel = Reloc::DynamicNoPIC;
+    break;
   }
+
+  // construct LTOModule, hand over ownership of module and target
+  SubtargetFeatures Features;
+  Features.getDefaultSubtargetFeatures(llvm::Triple(Triple));
+  std::string FeatureStr = Features.getString();
+  TargetOptions Options;
+  LTOModule::getTargetOptions(Options);
+  _target = march->createTargetMachine(Triple, _mCpu, FeatureStr, Options,
+                                       RelocModel, CodeModel::Default,
+                                       CodeGenOpt::Aggressive);
   return false;
 }
 
@@ -333,13 +338,13 @@ void LTOCodeGenerator::applyScopeRestrictions() {
 /// Optimize merged modules using various IPO passes
 bool LTOCodeGenerator::generateObjectFile(raw_ostream &out,
                                           std::string &errMsg) {
-  if ( this->determineTarget(errMsg) )
+  if (this->determineTarget(errMsg))
     return true;
 
   Module* mergedModule = _linker.getModule();
 
   // if options were requested, set them
-  if ( !_codegenOptions.empty() )
+  if (!_codegenOptions.empty())
     cl::ParseCommandLineOptions(_codegenOptions.size(),
                                 const_cast<char **>(&_codegenOptions[0]));
 
@@ -372,8 +377,7 @@ bool LTOCodeGenerator::generateObjectFile(raw_ostream &out,
   formatted_raw_ostream Out(out);
 
   if (_target->addPassesToEmitFile(*codeGenPasses, Out,
-                                   TargetMachine::CGFT_ObjectFile,
-                                   CodeGenOpt::Aggressive)) {
+                                   TargetMachine::CGFT_ObjectFile)) {
     errMsg = "target file type not supported";
     return true;
   }
@@ -402,7 +406,7 @@ void LTOCodeGenerator::setCodeGenDebugOptions(const char *options) {
        !o.first.empty(); o = getToken(o.second)) {
     // ParseCommandLineOptions() expects argv[0] to be program name. Lazily add
     // that.
-    if ( _codegenOptions.empty() )
+    if (_codegenOptions.empty())
       _codegenOptions.push_back(strdup("libLTO"));
     _codegenOptions.push_back(strdup(o.first.str().c_str()));
   }
diff --git a/tools/lto/LTOCodeGenerator.h b/tools/lto/LTOCodeGenerator.h
index 032dc3791729..3081b7dad1d1 100644
--- a/tools/lto/LTOCodeGenerator.h
+++ b/tools/lto/LTOCodeGenerator.h
@@ -70,7 +70,6 @@ private:
   llvm::TargetMachine*        _target;
   bool                        _emitDwarfDebugInfo;
   bool                        _scopeRestrictionsDone;
-  bool                        _runInternalizePass;
   lto_codegen_model           _codeModel;
   StringSet                   _mustPreserveSymbols;
   StringSet                   _asmUndefinedRefs;
diff --git a/tools/lto/LTOModule.cpp b/tools/lto/LTOModule.cpp
index 1dbd64bdc0be..c5b3d10db71b 100644
--- a/tools/lto/LTOModule.cpp
+++ b/tools/lto/LTOModule.cpp
@@ -26,6 +26,7 @@
 #include "llvm/MC/SubtargetFeature.h"
 #include "llvm/MC/MCParser/MCAsmParser.h"
 #include "llvm/Target/TargetRegisterInfo.h"
+#include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Host.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/Path.h"
@@ -37,6 +38,118 @@
 #include "llvm/ADT/Triple.h"
 using namespace llvm;
 
+static cl::opt<bool>
+EnableFPMAD("enable-fp-mad",
+  cl::desc("Enable less precise MAD instructions to be generated"),
+  cl::init(false));
+
+static cl::opt<bool>
+DisableFPElim("disable-fp-elim",
+  cl::desc("Disable frame pointer elimination optimization"),
+  cl::init(false));
+
+static cl::opt<bool>
+DisableFPElimNonLeaf("disable-non-leaf-fp-elim",
+  cl::desc("Disable frame pointer elimination optimization for non-leaf funcs"),
+  cl::init(false));
+
+static cl::opt<bool>
+EnableUnsafeFPMath("enable-unsafe-fp-math",
+  cl::desc("Enable optimizations that may decrease FP precision"),
+  cl::init(false));
+
+static cl::opt<bool>
+EnableNoInfsFPMath("enable-no-infs-fp-math",
+  cl::desc("Enable FP math optimizations that assume no +-Infs"),
+  cl::init(false));
+
+static cl::opt<bool>
+EnableNoNaNsFPMath("enable-no-nans-fp-math",
+  cl::desc("Enable FP math optimizations that assume no NaNs"),
+  cl::init(false));
+
+static cl::opt<bool>
+EnableHonorSignDependentRoundingFPMath("enable-sign-dependent-rounding-fp-math",
+  cl::Hidden,
+  cl::desc("Force codegen to assume rounding mode can change dynamically"),
+  cl::init(false));
+
+static cl::opt<bool>
+GenerateSoftFloatCalls("soft-float",
+  cl::desc("Generate software floating point library calls"),
+  cl::init(false));
+
+static cl::opt<llvm::FloatABI::ABIType>
+FloatABIForCalls("float-abi",
+  cl::desc("Choose float ABI type"),
+  cl::init(FloatABI::Default),
+  cl::values(
+    clEnumValN(FloatABI::Default, "default",
+               "Target default float ABI type"),
+    clEnumValN(FloatABI::Soft, "soft",
+               "Soft float ABI (implied by -soft-float)"),
+    clEnumValN(FloatABI::Hard, "hard",
+               "Hard float ABI (uses FP registers)"),
+    clEnumValEnd));
+
+static cl::opt<llvm::FPOpFusion::FPOpFusionMode>
+FuseFPOps("fp-contract",
+  cl::desc("Enable aggresive formation of fused FP ops"),
+  cl::init(FPOpFusion::Standard),
+  cl::values(
+    clEnumValN(FPOpFusion::Fast, "fast",
+               "Fuse FP ops whenever profitable"),
+    clEnumValN(FPOpFusion::Standard, "on",
+               "Only fuse 'blessed' FP ops."),
+    clEnumValN(FPOpFusion::Strict, "off",
+               "Only fuse FP ops when the result won't be effected."),
+    clEnumValEnd));
+
+static cl::opt<bool>
+DontPlaceZerosInBSS("nozero-initialized-in-bss",
+  cl::desc("Don't place zero-initialized symbols into bss section"),
+  cl::init(false));
+
+static cl::opt<bool>
+EnableGuaranteedTailCallOpt("tailcallopt",
+  cl::desc("Turn fastcc calls into tail calls by (potentially) changing ABI."),
+  cl::init(false));
+
+static cl::opt<bool>
+DisableTailCalls("disable-tail-calls",
+  cl::desc("Never emit tail calls"),
+  cl::init(false));
+
+static cl::opt<unsigned>
+OverrideStackAlignment("stack-alignment",
+  cl::desc("Override default stack alignment"),
+  cl::init(0));
+
+static cl::opt<bool>
+EnableRealignStack("realign-stack",
+  cl::desc("Realign stack if needed"),
+  cl::init(true));
+
+static cl::opt<std::string>
+TrapFuncName("trap-func", cl::Hidden,
+  cl::desc("Emit a call to trap function rather than a trap instruction"),
+  cl::init(""));
+
+static cl::opt<bool>
+EnablePIE("enable-pie",
+  cl::desc("Assume the creation of a position independent executable."),
+  cl::init(false));
+
+static cl::opt<bool>
+SegmentedStacks("segmented-stacks",
+  cl::desc("Use segmented stacks if possible."),
+  cl::init(false));
+
+static cl::opt<bool>
+UseInitArray("use-init-array",
+  cl::desc("Use .init_array instead of .ctors."),
+  cl::init(false));
+
 LTOModule::LTOModule(llvm::Module *m, llvm::TargetMachine *t)
   : _module(m), _target(t),
     _context(*_target->getMCAsmInfo(), *_target->getRegisterInfo(), NULL),
@@ -117,6 +230,30 @@ LTOModule *LTOModule::makeLTOModule(const void *mem, size_t length,
   return makeLTOModule(buffer.take(), errMsg);
 }
 
+void LTOModule::getTargetOptions(TargetOptions &Options) {
+  Options.LessPreciseFPMADOption = EnableFPMAD;
+  Options.NoFramePointerElim = DisableFPElim;
+  Options.NoFramePointerElimNonLeaf = DisableFPElimNonLeaf;
+  Options.AllowFPOpFusion = FuseFPOps;
+  Options.UnsafeFPMath = EnableUnsafeFPMath;
+  Options.NoInfsFPMath = EnableNoInfsFPMath;
+  Options.NoNaNsFPMath = EnableNoNaNsFPMath;
+  Options.HonorSignDependentRoundingFPMathOption =
+    EnableHonorSignDependentRoundingFPMath;
+  Options.UseSoftFloat = GenerateSoftFloatCalls;
+  if (FloatABIForCalls != FloatABI::Default)
+    Options.FloatABIType = FloatABIForCalls;
+  Options.NoZerosInBSS = DontPlaceZerosInBSS;
+  Options.GuaranteedTailCallOpt = EnableGuaranteedTailCallOpt;
+  Options.DisableTailCalls = DisableTailCalls;
+  Options.StackAlignmentOverride = OverrideStackAlignment;
+  Options.RealignStack = EnableRealignStack;
+  Options.TrapFuncName = TrapFuncName;
+  Options.PositionIndependentExecutable = EnablePIE;
+  Options.EnableSegmentedStacks = SegmentedStacks;
+  Options.UseInitArray = UseInitArray;
+}
+
 LTOModule *LTOModule::makeLTOModule(MemoryBuffer *buffer,
                                     std::string &errMsg) {
   static bool Initialized = false;
@@ -150,6 +287,7 @@ LTOModule *LTOModule::makeLTOModule(MemoryBuffer *buffer,
   std::string FeatureStr = Features.getString();
   std::string CPU;
   TargetOptions Options;
+  getTargetOptions(Options);
   TargetMachine *target = march->createTargetMachine(Triple, CPU, FeatureStr,
                                                      Options);
   LTOModule *Ret = new LTOModule(m.take(), target);
@@ -271,6 +409,9 @@ void LTOModule::addDefinedDataSymbol(GlobalValue *v) {
   // Add to list of defined symbols.
   addDefinedSymbol(v, false);
 
+  if (!v->hasSection() /* || !isTargetDarwin */)
+    return;
+
   // Special case i386/ppc ObjC data structures in magic sections:
   // The issue is that the old ObjC object format did some strange
   // contortions to avoid real linker symbols.  For instance, the
@@ -290,26 +431,25 @@ void LTOModule::addDefinedDataSymbol(GlobalValue *v) {
   // a class was missing.
   // The following synthesizes the implicit .objc_* symbols for the linker
   // from the ObjC data structures generated by the front end.
-  if (v->hasSection() /* && isTargetDarwin */) {
-    // special case if this data blob is an ObjC class definition
-    if (v->getSection().compare(0, 15, "__OBJC,__class,") == 0) {
-      if (GlobalVariable *gv = dyn_cast<GlobalVariable>(v)) {
-        addObjCClass(gv);
-      }
+
+  // special case if this data blob is an ObjC class definition
+  if (v->getSection().compare(0, 15, "__OBJC,__class,") == 0) {
+    if (GlobalVariable *gv = dyn_cast<GlobalVariable>(v)) {
+      addObjCClass(gv);
     }
+  }
 
-    // special case if this data blob is an ObjC category definition
-    else if (v->getSection().compare(0, 18, "__OBJC,__category,") == 0) {
-      if (GlobalVariable *gv = dyn_cast<GlobalVariable>(v)) {
-        addObjCCategory(gv);
-      }
+  // special case if this data blob is an ObjC category definition
+  else if (v->getSection().compare(0, 18, "__OBJC,__category,") == 0) {
+    if (GlobalVariable *gv = dyn_cast<GlobalVariable>(v)) {
+      addObjCCategory(gv);
     }
+  }
 
-    // special case if this data blob is the list of referenced classes
-    else if (v->getSection().compare(0, 18, "__OBJC,__cls_refs,") == 0) {
-      if (GlobalVariable *gv = dyn_cast<GlobalVariable>(v)) {
-        addObjCClassRef(gv);
-      }
+  // special case if this data blob is the list of referenced classes
+  else if (v->getSection().compare(0, 18, "__OBJC,__cls_refs,") == 0) {
+    if (GlobalVariable *gv = dyn_cast<GlobalVariable>(v)) {
+      addObjCClassRef(gv);
     }
   }
 }
@@ -409,7 +549,7 @@ void LTOModule::addAsmGlobalSymbol(const char *name,
     // much.
 
     // fill information structure
-    info.name = name;
+    info.name = entry.getKey().data();
     info.attributes =
       LTO_SYMBOL_PERMISSIONS_DATA | LTO_SYMBOL_DEFINITION_REGULAR | scope;
     info.isFunction = false;
@@ -599,7 +739,7 @@ namespace {
         markGlobal(*Symbol);
     }
     virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol,
-                              unsigned Size , unsigned ByteAlignment) {
+                              uint64_t Size , unsigned ByteAlignment) {
       markDefined(*Symbol);
     }
     virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
@@ -658,21 +798,20 @@ bool LTOModule::addAsmGlobalSymbols(std::string &errMsg) {
   OwningPtr<MCAsmParser> Parser(createMCAsmParser(SrcMgr,
                                                   _context, *Streamer,
                                                   *_target->getMCAsmInfo()));
-  OwningPtr<MCSubtargetInfo> STI(_target->getTarget().
-                      createMCSubtargetInfo(_target->getTargetTriple(),
-                                            _target->getTargetCPU(),
-                                            _target->getTargetFeatureString()));
-  OwningPtr<MCTargetAsmParser>
-    TAP(_target->getTarget().createMCAsmParser(*STI, *Parser.get()));
+  const Target &T = _target->getTarget();
+  OwningPtr<MCSubtargetInfo>
+    STI(T.createMCSubtargetInfo(_target->getTargetTriple(),
+                                _target->getTargetCPU(),
+                                _target->getTargetFeatureString()));
+  OwningPtr<MCTargetAsmParser> TAP(T.createMCAsmParser(*STI, *Parser.get()));
   if (!TAP) {
-    errMsg = "target " + std::string(_target->getTarget().getName()) +
-        " does not define AsmParser.";
+    errMsg = "target " + std::string(T.getName()) +
+      " does not define AsmParser.";
     return true;
   }
 
   Parser->setTargetParser(*TAP);
-  int Res = Parser->Run(false);
-  if (Res)
+  if (Parser->Run(false))
     return true;
 
   for (RecordStreamer::const_iterator i = Streamer->begin(),
@@ -687,6 +826,7 @@ bool LTOModule::addAsmGlobalSymbols(std::string &errMsg) {
              Value == RecordStreamer::Used)
       addAsmGlobalSymbolUndef(Key.data());
   }
+
   return false;
 }
 
@@ -694,8 +834,10 @@ bool LTOModule::addAsmGlobalSymbols(std::string &errMsg) {
 static bool isDeclaration(const GlobalValue &V) {
   if (V.hasAvailableExternallyLinkage())
     return true;
+
   if (V.isMaterializable())
     return false;
+
   return V.isDeclaration();
 }
 
diff --git a/tools/lto/LTOModule.h b/tools/lto/LTOModule.h
index cafb927abfb1..8e52206b5b5c 100644
--- a/tools/lto/LTOModule.h
+++ b/tools/lto/LTOModule.h
@@ -29,6 +29,7 @@ namespace llvm {
   class Function;
   class GlobalValue;
   class MemoryBuffer;
+  class TargetOptions;
   class Value;
 }
 
@@ -126,6 +127,10 @@ public:
     return _asm_undefines;
   }
 
+  /// getTargetOptions - Fill the TargetOptions object with the options
+  /// specified on the command line.
+  static void getTargetOptions(llvm::TargetOptions &Options);
+
 private:
   /// parseSymbols - Parse the symbols from the module and model-level ASM and
   /// add them to either the defined or undefined lists.
diff --git a/tools/macho-dump/macho-dump.cpp b/tools/macho-dump/macho-dump.cpp
index 2b22c3b0fd91..20deda9a0cbd 100644
--- a/tools/macho-dump/macho-dump.cpp
+++ b/tools/macho-dump/macho-dump.cpp
@@ -194,7 +194,7 @@ static int DumpSegment64Command(MachOObject &Obj,
   }
   outs() << "  ])\n";
 
-  return 0;
+  return Res;
 }
 
 static void DumpSymbolTableEntryData(MachOObject &Obj,
@@ -332,6 +332,35 @@ static int DumpLinkeditDataCommand(MachOObject &Obj,
   return 0;
 }
 
+static int DumpDataInCodeDataCommand(MachOObject &Obj,
+                                     const MachOObject::LoadCommandInfo &LCI) {
+  InMemoryStruct<macho::LinkeditDataLoadCommand> LLC;
+  Obj.ReadLinkeditDataLoadCommand(LCI, LLC);
+  if (!LLC)
+    return Error("unable to read segment load command");
+
+  outs() << "  ('dataoff', " << LLC->DataOffset << ")\n"
+         << "  ('datasize', " << LLC->DataSize << ")\n"
+         << "  ('_data_regions', [\n";
+
+
+  unsigned NumRegions = LLC->DataSize / 8;
+  for (unsigned i = 0; i < NumRegions; ++i) {
+    InMemoryStruct<macho::DataInCodeTableEntry> DICE;
+    Obj.ReadDataInCodeTableEntry(LLC->DataOffset, i, DICE);
+    if (!DICE)
+      return Error("unable to read DataInCodeTableEntry");
+    outs() << "    # DICE " << i << "\n"
+           << "    ('offset', " << DICE->Offset << ")\n"
+           << "    ('length', " << DICE->Length << ")\n"
+           << "    ('kind', " << DICE->Kind << ")\n";
+  }
+
+  outs() <<"  ])\n";
+
+  return 0;
+}
+
 
 static int DumpLoadCommand(MachOObject &Obj, unsigned Index) {
   const MachOObject::LoadCommandInfo &LCI = Obj.getLoadCommandInfo(Index);
@@ -358,6 +387,9 @@ static int DumpLoadCommand(MachOObject &Obj, unsigned Index) {
   case macho::LCT_FunctionStarts:
     Res = DumpLinkeditDataCommand(Obj, LCI);
     break;
+  case macho::LCT_DataInCode:
+    Res = DumpDataInCodeDataCommand(Obj, LCI);
+    break;
   default:
     Warning("unknown load command: " + Twine(LCI.Command.Type));
     break;
diff --git a/tools/opt/opt.cpp b/tools/opt/opt.cpp
index a5b0511fd980..4ada7d1e76d4 100644
--- a/tools/opt/opt.cpp
+++ b/tools/opt/opt.cpp
@@ -13,12 +13,12 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/LLVMContext.h"
+#include "llvm/DebugInfo.h"
 #include "llvm/Module.h"
 #include "llvm/PassManager.h"
 #include "llvm/CallGraphSCCPass.h"
 #include "llvm/Bitcode/ReaderWriter.h"
 #include "llvm/Assembly/PrintModulePass.h"
-#include "llvm/Analysis/DebugInfo.h"
 #include "llvm/Analysis/Verifier.h"
 #include "llvm/Analysis/LoopPass.h"
 #include "llvm/Analysis/RegionPass.h"
@@ -104,15 +104,23 @@ StandardLinkOpts("std-link-opts",
 
 static cl::opt<bool>
 OptLevelO1("O1",
-           cl::desc("Optimization level 1. Similar to llvm-gcc -O1"));
+           cl::desc("Optimization level 1. Similar to clang -O1"));
 
 static cl::opt<bool>
 OptLevelO2("O2",
-           cl::desc("Optimization level 2. Similar to llvm-gcc -O2"));
+           cl::desc("Optimization level 2. Similar to clang -O2"));
+
+static cl::opt<bool>
+OptLevelOs("Os",
+           cl::desc("Like -O2 with extra optimizations for size. Similar to clang -Os"));
+
+static cl::opt<bool>
+OptLevelOz("Oz",
+           cl::desc("Like -Os but reduces code size further. Similar to clang -Oz"));
 
 static cl::opt<bool>
 OptLevelO3("O3",
-           cl::desc("Optimization level 3. Similar to llvm-gcc -O3"));
+           cl::desc("Optimization level 3. Similar to clang -O3"));
 
 static cl::opt<std::string>
 TargetTriple("mtriple", cl::desc("Override target triple for module"));
@@ -409,16 +417,21 @@ static inline void addPass(PassManagerBase &PM, Pass *P) {
 ///
 /// OptLevel - Optimization Level
 static void AddOptimizationPasses(PassManagerBase &MPM,FunctionPassManager &FPM,
-                                  unsigned OptLevel) {
+                                  unsigned OptLevel, unsigned SizeLevel) {
   FPM.add(createVerifierPass());                  // Verify that input is correct
 
   PassManagerBuilder Builder;
   Builder.OptLevel = OptLevel;
+  Builder.SizeLevel = SizeLevel;
 
   if (DisableInline) {
     // No inlining pass
   } else if (OptLevel > 1) {
     unsigned Threshold = 225;
+    if (SizeLevel == 1)      // -Os
+      Threshold = 75;
+    else if (SizeLevel == 2) // -Oz
+      Threshold = 25;
     if (OptLevel > 2)
       Threshold = 275;
     Builder.Inliner = createFunctionInliningPass(Threshold);
@@ -571,7 +584,7 @@ int main(int argc, char **argv) {
     Passes.add(TD);
 
   OwningPtr<FunctionPassManager> FPasses;
-  if (OptLevelO1 || OptLevelO2 || OptLevelO3) {
+  if (OptLevelO1 || OptLevelO2 || OptLevelOs || OptLevelOz || OptLevelO3) {
     FPasses.reset(new FunctionPassManager(M.get()));
     if (TD)
       FPasses->add(new TargetData(*TD));
@@ -617,17 +630,27 @@ int main(int argc, char **argv) {
     }
 
     if (OptLevelO1 && OptLevelO1.getPosition() < PassList.getPosition(i)) {
-      AddOptimizationPasses(Passes, *FPasses, 1);
+      AddOptimizationPasses(Passes, *FPasses, 1, 0);
       OptLevelO1 = false;
     }
 
     if (OptLevelO2 && OptLevelO2.getPosition() < PassList.getPosition(i)) {
-      AddOptimizationPasses(Passes, *FPasses, 2);
+      AddOptimizationPasses(Passes, *FPasses, 2, 0);
       OptLevelO2 = false;
     }
 
+    if (OptLevelOs && OptLevelOs.getPosition() < PassList.getPosition(i)) {
+      AddOptimizationPasses(Passes, *FPasses, 2, 1);
+      OptLevelOs = false;
+    }
+
+    if (OptLevelOz && OptLevelOz.getPosition() < PassList.getPosition(i)) {
+      AddOptimizationPasses(Passes, *FPasses, 2, 2);
+      OptLevelOz = false;
+    }
+
     if (OptLevelO3 && OptLevelO3.getPosition() < PassList.getPosition(i)) {
-      AddOptimizationPasses(Passes, *FPasses, 3);
+      AddOptimizationPasses(Passes, *FPasses, 3, 0);
       OptLevelO3 = false;
     }
 
@@ -682,15 +705,21 @@ int main(int argc, char **argv) {
   }
 
   if (OptLevelO1)
-    AddOptimizationPasses(Passes, *FPasses, 1);
+    AddOptimizationPasses(Passes, *FPasses, 1, 0);
 
   if (OptLevelO2)
-    AddOptimizationPasses(Passes, *FPasses, 2);
+    AddOptimizationPasses(Passes, *FPasses, 2, 0);
+
+  if (OptLevelOs)
+    AddOptimizationPasses(Passes, *FPasses, 2, 1);
+
+  if (OptLevelOz)
+    AddOptimizationPasses(Passes, *FPasses, 2, 2);
 
   if (OptLevelO3)
-    AddOptimizationPasses(Passes, *FPasses, 3);
+    AddOptimizationPasses(Passes, *FPasses, 3, 0);
 
-  if (OptLevelO1 || OptLevelO2 || OptLevelO3) {
+  if (OptLevelO1 || OptLevelO2 || OptLevelOs || OptLevelOz || OptLevelO3) {
     FPasses->doInitialization();
     for (Module::iterator F = M->begin(), E = M->end(); F != E; ++F)
       FPasses->run(*F);