Vendor import of lld trunk r291274:vendor/lld/lld-trunk-r291274

https://llvm.org/svn/llvm-project/lld/trunk@291274

38 files changed, 271 insertions, 336 deletions

diff --git a/COFF/Driver.cpp b/COFF/Driver.cpp
index dc3a00ba55ed..4dabd9ebcc6d 100644
--- a/COFF/Driver.cpp
+++ b/COFF/Driver.cpp
@@ -25,6 +25,7 @@
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/Path.h"
 #include "llvm/Support/Process.h"
+#include "llvm/Support/TarWriter.h"
 #include "llvm/Support/TargetSelect.h"
 #include "llvm/Support/raw_ostream.h"
 #include <algorithm>
@@ -98,9 +99,9 @@ MemoryBufferRef LinkerDriver::takeBuffer(std::unique_ptr<MemoryBuffer> MB) {
   MemoryBufferRef MBRef = *MB;
   OwningMBs.push_back(std::move(MB));
 
-  if (Driver->Cpio)
-    Driver->Cpio->append(relativeToRoot(MBRef.getBufferIdentifier()),
-                         MBRef.getBuffer());
+  if (Driver->Tar)
+    Driver->Tar->append(relativeToRoot(MBRef.getBufferIdentifier()),
+                        MBRef.getBuffer());
 
   return MBRef;
 }
@@ -368,7 +369,7 @@ static std::string createResponseFile(const opt::InputArgList &Args,
     case OPT_libpath:
       break;
     default:
-      OS << stringize(Arg) << "\n";
+      OS << toString(Arg) << "\n";
     }
   }
 
@@ -458,13 +459,17 @@ void LinkerDriver::link(ArrayRef<const char *> ArgsArr) {
 
   if (auto *Arg = Args.getLastArg(OPT_linkrepro)) {
     SmallString<64> Path = StringRef(Arg->getValue());
-    sys::path::append(Path, "repro");
-    ErrorOr<CpioFile *> F = CpioFile::create(Path);
-    if (F)
-      Cpio.reset(*F);
-    else
-      errs() << "/linkrepro: failed to open " << Path
-             << ".cpio: " << F.getError().message() << '\n';
+    sys::path::append(Path, "repro.tar");
+
+    Expected<std::unique_ptr<TarWriter>> ErrOrWriter =
+        TarWriter::create(Path, "repro");
+
+    if (ErrOrWriter) {
+      Tar = std::move(*ErrOrWriter);
+    } else {
+      errs() << "/linkrepro: failed to open " << Path << ": "
+             << toString(ErrOrWriter.takeError()) << '\n';
+    }
   }
 
   if (Args.filtered_begin(OPT_INPUT) == Args.filtered_end())
@@ -683,10 +688,10 @@ void LinkerDriver::link(ArrayRef<const char *> ArgsArr) {
   if (!Resources.empty())
     addBuffer(convertResToCOFF(Resources));
 
-  if (Cpio)
-    Cpio->append("response.txt",
-                 createResponseFile(Args, FilePaths,
-                                    ArrayRef<StringRef>(SearchPaths).slice(1)));
+  if (Tar)
+    Tar->append("response.txt",
+                createResponseFile(Args, FilePaths,
+                                   ArrayRef<StringRef>(SearchPaths).slice(1)));
 
   // Handle /largeaddressaware
   if (Config->is64() || Args.hasArg(OPT_largeaddressaware))
diff --git a/COFF/Driver.h b/COFF/Driver.h
index e8114640edec..44894269fcbe 100644
--- a/COFF/Driver.h
+++ b/COFF/Driver.h
@@ -20,6 +20,7 @@
 #include "llvm/Object/COFF.h"
 #include "llvm/Option/Arg.h"
 #include "llvm/Option/ArgList.h"
+#include "llvm/Support/TarWriter.h"
 #include <memory>
 #include <set>
 #include <vector>
@@ -74,7 +75,7 @@ private:
   ArgParser Parser;
   SymbolTable Symtab;
 
-  std::unique_ptr<CpioFile> Cpio; // for /linkrepro
+  std::unique_ptr<llvm::TarWriter> Tar; // for /linkrepro
 
   // Opens a file. Path has to be resolved already.
   MemoryBufferRef openFile(StringRef Path);
diff --git a/COFF/InputFiles.cpp b/COFF/InputFiles.cpp
index 0a97c2185f89..cde355cd3f34 100644
--- a/COFF/InputFiles.cpp
+++ b/COFF/InputFiles.cpp
@@ -372,6 +372,8 @@ MachineTypes BitcodeFile::getMachineType() {
     return IMAGE_FILE_MACHINE_UNKNOWN;
   }
 }
+} // namespace coff
+} // namespace lld
 
 // Returns the last element of a path, which is supposed to be a filename.
 static StringRef getBasename(StringRef Path) {
@@ -382,7 +384,7 @@ static StringRef getBasename(StringRef Path) {
 }
 
 // Returns a string in the format of "foo.obj" or "foo.obj(bar.lib)".
-std::string toString(InputFile *File) {
+std::string lld::toString(coff::InputFile *File) {
   if (!File)
     return "(internal)";
   if (File->ParentName.empty())
@@ -393,6 +395,3 @@ std::string toString(InputFile *File) {
           .str();
   return StringRef(Res).lower();
 }
-
-} // namespace coff
-} // namespace lld
diff --git a/COFF/InputFiles.h b/COFF/InputFiles.h
index 498a1743e985..1b5d42939cca 100644
--- a/COFF/InputFiles.h
+++ b/COFF/InputFiles.h
@@ -202,10 +202,9 @@ private:
   llvm::BumpPtrAllocator Alloc;
   std::unique_ptr<LTOModule> M;
 };
-
-std::string toString(InputFile *File);
-
 } // namespace coff
+
+std::string toString(coff::InputFile *File);
 } // namespace lld
 
 #endif
diff --git a/COFF/Symbols.cpp b/COFF/Symbols.cpp
index 6de85d581f49..c44537d37135 100644
--- a/COFF/Symbols.cpp
+++ b/COFF/Symbols.cpp
@@ -19,6 +19,13 @@
 using namespace llvm;
 using namespace llvm::object;
 
+// Returns a symbol name for an error message.
+std::string lld::toString(coff::SymbolBody &B) {
+  if (Optional<std::string> S = coff::demangle(B.getName()))
+    return ("\"" + *S + "\" (" + B.getName() + ")").str();
+  return B.getName();
+}
+
 namespace lld {
 namespace coff {
 
@@ -73,13 +80,5 @@ Defined *Undefined::getWeakAlias() {
       return D;
   return nullptr;
 }
-
-// Returns a symbol name for an error message.
-std::string toString(SymbolBody &B) {
-  if (Optional<std::string> S = demangle(B.getName()))
-    return ("\"" + *S + "\" (" + B.getName() + ")").str();
-  return B.getName();
-}
-
 } // namespace coff
 } // namespace lld
diff --git a/COFF/Symbols.h b/COFF/Symbols.h
index bc9ad4aa8aff..1ca7366364d7 100644
--- a/COFF/Symbols.h
+++ b/COFF/Symbols.h
@@ -428,10 +428,9 @@ inline Symbol *SymbolBody::symbol() {
   return reinterpret_cast<Symbol *>(reinterpret_cast<char *>(this) -
                                     offsetof(Symbol, Body));
 }
-
-std::string toString(SymbolBody &B);
-
 } // namespace coff
+
+std::string toString(coff::SymbolBody &B);
 } // namespace lld
 
 #endif
diff --git a/ELF/Driver.cpp b/ELF/Driver.cpp
index a11dbc7cc47f..6afbe62e5ec7 100644
--- a/ELF/Driver.cpp
+++ b/ELF/Driver.cpp
@@ -25,6 +25,7 @@
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/StringSwitch.h"
 #include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Path.h"
 #include "llvm/Support/TargetSelect.h"
 #include "llvm/Support/raw_ostream.h"
 #include <cstdlib>
@@ -182,8 +183,8 @@ Optional<MemoryBufferRef> LinkerDriver::readFile(StringRef Path) {
   MemoryBufferRef MBRef = MB->getMemBufferRef();
   make<std::unique_ptr<MemoryBuffer>>(std::move(MB)); // take MB ownership
 
-  if (Cpio)
-    Cpio->append(relativeToRoot(Path), MBRef.getBuffer());
+  if (Tar)
+    Tar->append(relativeToRoot(Path), MBRef.getBuffer());
 
   return MBRef;
 }
@@ -309,14 +310,16 @@ void LinkerDriver::main(ArrayRef<const char *> ArgsArr, bool CanExitEarly) {
   if (const char *Path = getReproduceOption(Args)) {
     // Note that --reproduce is a debug option so you can ignore it
     // if you are trying to understand the whole picture of the code.
-    ErrorOr<CpioFile *> F = CpioFile::create(Path);
-    if (F) {
-      Cpio.reset(*F);
-      Cpio->append("response.txt", createResponseFile(Args));
-      Cpio->append("version.txt", getLLDVersion() + "\n");
-    } else
-      error(F.getError(),
-            Twine("--reproduce: failed to open ") + Path + ".cpio");
+    Expected<std::unique_ptr<TarWriter>> ErrOrWriter =
+        TarWriter::create(Path, path::stem(Path));
+    if (ErrOrWriter) {
+      Tar = std::move(*ErrOrWriter);
+      Tar->append("response.txt", createResponseFile(Args));
+      Tar->append("version.txt", getLLDVersion() + "\n");
+    } else {
+      error(Twine("--reproduce: failed to open ") + Path + ": " +
+            toString(ErrOrWriter.takeError()));
+    }
   }
 
   readConfigs(Args);
@@ -423,7 +426,7 @@ static uint64_t parseSectionAddress(StringRef S, opt::Arg *Arg) {
   if (S.startswith("0x"))
     S = S.drop_front(2);
   if (S.getAsInteger(16, VA))
-    error("invalid argument: " + stringize(Arg));
+    error("invalid argument: " + toString(Arg));
   return VA;
 }
 
diff --git a/ELF/Driver.h b/ELF/Driver.h
index cba1eb164fdd..dadee5eef355 100644
--- a/ELF/Driver.h
+++ b/ELF/Driver.h
@@ -17,6 +17,7 @@
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/StringSet.h"
 #include "llvm/Option/ArgList.h"
+#include "llvm/Support/TarWriter.h"
 #include "llvm/Support/raw_ostream.h"
 
 namespace lld {
@@ -29,7 +30,7 @@ public:
   void main(ArrayRef<const char *> Args, bool CanExitEarly);
   void addFile(StringRef Path);
   void addLibrary(StringRef Name);
-  std::unique_ptr<CpioFile> Cpio; // for reproduce
+  std::unique_ptr<llvm::TarWriter> Tar; // for reproduce
 
 private:
   std::vector<MemoryBufferRef> getArchiveMembers(MemoryBufferRef MB);
diff --git a/ELF/DriverUtils.cpp b/ELF/DriverUtils.cpp
index a81b133f674b..3a20cd76efe2 100644
--- a/ELF/DriverUtils.cpp
+++ b/ELF/DriverUtils.cpp
@@ -146,7 +146,7 @@ std::string elf::createResponseFile(const opt::InputArgList &Args) {
          << "\n";
       break;
     default:
-      OS << stringize(Arg) << "\n";
+      OS << toString(Arg) << "\n";
     }
   }
   return Data.str();
diff --git a/ELF/InputFiles.cpp b/ELF/InputFiles.cpp
index f4128c5096cb..bd9f25873c87 100644
--- a/ELF/InputFiles.cpp
+++ b/ELF/InputFiles.cpp
@@ -92,12 +92,11 @@ std::string elf::ObjectFile<ELFT>::getLineInfo(InputSectionBase<ELFT> *S,
       DILineInfoSpecifier::FileLineInfoKind::AbsoluteFilePath, Info);
   if (Info.Line == 0)
     return "";
-  return convertToUnixPathSeparator(Info.FileName) + ":" +
-         std::to_string(Info.Line);
+  return Info.FileName + ":" + std::to_string(Info.Line);
 }
 
 // Returns "(internal)", "foo.a(bar.o)" or "baz.o".
-std::string elf::toString(const InputFile *F) {
+std::string lld::toString(const InputFile *F) {
   if (!F)
     return "(internal)";
   if (!F->ArchiveName.empty())
@@ -525,9 +524,9 @@ ArchiveFile::getMember(const Archive::Symbol *Sym) {
             "could not get the buffer for the member defining symbol " +
                 Sym->getName());
 
-  if (C.getParent()->isThin() && Driver->Cpio)
-    Driver->Cpio->append(relativeToRoot(check(C.getFullName())),
-                         Ret.getBuffer());
+  if (C.getParent()->isThin() && Driver->Tar)
+    Driver->Tar->append(relativeToRoot(check(C.getFullName())),
+                        Ret.getBuffer());
   if (C.getParent()->isThin())
     return {Ret, 0};
   return {Ret, C.getChildOffset()};
diff --git a/ELF/InputFiles.h b/ELF/InputFiles.h
index aba1d71379b0..8b188348199f 100644
--- a/ELF/InputFiles.h
+++ b/ELF/InputFiles.h
@@ -36,10 +36,16 @@ class InputFile;
 
 namespace lld {
 namespace elf {
+class InputFile;
+}
+
+// Returns "(internal)", "foo.a(bar.o)" or "baz.o".
+std::string toString(const elf::InputFile *F);
+
+namespace elf {
 
 using llvm::object::Archive;
 
-class InputFile;
 class Lazy;
 class SymbolBody;
 
@@ -84,9 +90,6 @@ private:
   const Kind FileKind;
 };
 
-// Returns "(internal)", "foo.a(bar.o)" or "baz.o".
-std::string toString(const InputFile *F);
-
 template <typename ELFT> class ELFFileBase : public InputFile {
 public:
   typedef typename ELFT::Shdr Elf_Shdr;
diff --git a/ELF/InputSection.cpp b/ELF/InputSection.cpp
index 805e51dab507..e87d92aa207c 100644
--- a/ELF/InputSection.cpp
+++ b/ELF/InputSection.cpp
@@ -34,7 +34,7 @@ using namespace lld::elf;
 
 // Returns a string to construct an error message.
 template <class ELFT>
-std::string elf::toString(const InputSectionBase<ELFT> *Sec) {
+std::string lld::toString(const InputSectionBase<ELFT> *Sec) {
   return (Sec->getFile()->getName() + ":(" + Sec->Name + ")").str();
 }
 
@@ -844,7 +844,7 @@ template class elf::MergeInputSection<ELF32BE>;
 template class elf::MergeInputSection<ELF64LE>;
 template class elf::MergeInputSection<ELF64BE>;
 
-template std::string elf::toString(const InputSectionBase<ELF32LE> *);
-template std::string elf::toString(const InputSectionBase<ELF32BE> *);
-template std::string elf::toString(const InputSectionBase<ELF64LE> *);
-template std::string elf::toString(const InputSectionBase<ELF64BE> *);
+template std::string lld::toString(const InputSectionBase<ELF32LE> *);
+template std::string lld::toString(const InputSectionBase<ELF32BE> *);
+template std::string lld::toString(const InputSectionBase<ELF64LE> *);
+template std::string lld::toString(const InputSectionBase<ELF64BE> *);
diff --git a/ELF/InputSection.h b/ELF/InputSection.h
index adbc1e1e3829..fc7a7fb60973 100644
--- a/ELF/InputSection.h
+++ b/ELF/InputSection.h
@@ -318,10 +318,9 @@ private:
 };
 
 template <class ELFT> InputSection<ELFT> InputSection<ELFT>::Discarded;
-
-template <class ELFT> std::string toString(const InputSectionBase<ELFT> *);
-
 } // namespace elf
+
+template <class ELFT> std::string toString(const elf::InputSectionBase<ELFT> *);
 } // namespace lld
 
 #endif
diff --git a/ELF/LinkerScript.cpp b/ELF/LinkerScript.cpp
index 5057b57a4a54..ccc1059949db 100644
--- a/ELF/LinkerScript.cpp
+++ b/ELF/LinkerScript.cpp
@@ -264,42 +264,12 @@ LinkerScript<ELFT>::createInputSectionList(OutputSectionCommand &OutCmd) {
 }
 
 template <class ELFT>
-static SectionKey<ELFT::Is64Bits> createKey(InputSectionBase<ELFT> *C,
-                                            StringRef OutsecName) {
-  // When using linker script the merge rules are different.
-  // Unfortunately, linker scripts are name based. This means that expressions
-  // like *(.foo*) can refer to multiple input sections that would normally be
-  // placed in different output sections. We cannot put them in different
-  // output sections or we would produce wrong results for
-  // start = .; *(.foo.*) end = .; *(.bar)
-  // and a mapping of .foo1 and .bar1 to one section and .foo2 and .bar2 to
-  // another. The problem is that there is no way to layout those output
-  // sections such that the .foo sections are the only thing between the
-  // start and end symbols.
-
-  // An extra annoyance is that we cannot simply disable merging of the contents
-  // of SHF_MERGE sections, but our implementation requires one output section
-  // per "kind" (string or not, which size/aligment).
-  // Fortunately, creating symbols in the middle of a merge section is not
-  // supported by bfd or gold, so we can just create multiple section in that
-  // case.
-  typedef typename ELFT::uint uintX_t;
-  uintX_t Flags = C->Flags & (SHF_MERGE | SHF_STRINGS);
-
-  uintX_t Alignment = 0;
-  if (isa<MergeInputSection<ELFT>>(C))
-    Alignment = std::max<uintX_t>(C->Alignment, C->Entsize);
-
-  return SectionKey<ELFT::Is64Bits>{OutsecName, /*Type*/ 0, Flags, Alignment};
-}
-
-template <class ELFT>
 void LinkerScript<ELFT>::addSection(OutputSectionFactory<ELFT> &Factory,
                                     InputSectionBase<ELFT> *Sec,
                                     StringRef Name) {
   OutputSectionBase *OutSec;
   bool IsNew;
-  std::tie(OutSec, IsNew) = Factory.create(createKey(Sec, Name), Sec);
+  std::tie(OutSec, IsNew) = Factory.create(Sec, Name);
   if (IsNew)
     OutputSections->push_back(OutSec);
   OutSec->addSection(Sec);
diff --git a/ELF/OutputSections.cpp b/ELF/OutputSections.cpp
index bf7f9c29a29a..a9d951dcc745 100644
--- a/ELF/OutputSections.cpp
+++ b/ELF/OutputSections.cpp
@@ -534,41 +534,111 @@ static typename ELFT::uint getOutFlags(InputSectionBase<ELFT> *S) {
   return S->Flags & ~SHF_GROUP & ~SHF_COMPRESSED;
 }
 
+namespace llvm {
+template <> struct DenseMapInfo<lld::elf::SectionKey> {
+  static lld::elf::SectionKey getEmptyKey();
+  static lld::elf::SectionKey getTombstoneKey();
+  static unsigned getHashValue(const lld::elf::SectionKey &Val);
+  static bool isEqual(const lld::elf::SectionKey &LHS,
+                      const lld::elf::SectionKey &RHS);
+};
+}
+
 template <class ELFT>
-static SectionKey<ELFT::Is64Bits> createKey(InputSectionBase<ELFT> *C,
-                                            StringRef OutsecName) {
+static SectionKey createKey(InputSectionBase<ELFT> *C, StringRef OutsecName) {
+  //  The ELF spec just says
+  // ----------------------------------------------------------------
+  // In the first phase, input sections that match in name, type and
+  // attribute flags should be concatenated into single sections.
+  // ----------------------------------------------------------------
+  //
+  // However, it is clear that at least some flags have to be ignored for
+  // section merging. At the very least SHF_GROUP and SHF_COMPRESSED have to be
+  // ignored. We should not have two output .text sections just because one was
+  // in a group and another was not for example.
+  //
+  // It also seems that that wording was a late addition and didn't get the
+  // necessary scrutiny.
+  //
+  // Merging sections with different flags is expected by some users. One
+  // reason is that if one file has
+  //
+  // int *const bar __attribute__((section(".foo"))) = (int *)0;
+  //
+  // gcc with -fPIC will produce a read only .foo section. But if another
+  // file has
+  //
+  // int zed;
+  // int *const bar __attribute__((section(".foo"))) = (int *)&zed;
+  //
+  // gcc with -fPIC will produce a read write section.
+  //
+  // Last but not least, when using linker script the merge rules are forced by
+  // the script. Unfortunately, linker scripts are name based. This means that
+  // expressions like *(.foo*) can refer to multiple input sections with
+  // different flags. We cannot put them in different output sections or we
+  // would produce wrong results for
+  //
+  // start = .; *(.foo.*) end = .; *(.bar)
+  //
+  // and a mapping of .foo1 and .bar1 to one section and .foo2 and .bar2 to
+  // another. The problem is that there is no way to layout those output
+  // sections such that the .foo sections are the only thing between the start
+  // and end symbols.
+  //
+  // Given the above issues, we instead merge sections by name and error on
+  // incompatible types and flags.
+  //
+  // The exception being SHF_MERGE, where we create different output sections
+  // for each alignment. This makes each output section simple. In case of
+  // relocatable object generation we do not try to perform merging and treat
+  // SHF_MERGE sections as regular ones, but also create different output
+  // sections for them to allow merging at final linking stage.
+  //
+  // Fortunately, creating symbols in the middle of a merge section is not
+  // supported by bfd or gold, so the SHF_MERGE exception should not cause
+  // problems with most linker scripts.
+
   typedef typename ELFT::uint uintX_t;
-  uintX_t Flags = getOutFlags(C);
+  uintX_t Flags = C->Flags & (SHF_MERGE | SHF_STRINGS);
 
-  // For SHF_MERGE we create different output sections for each alignment.
-  // This makes each output section simple and keeps a single level mapping from
-  // input to output.
-  // In case of relocatable object generation we do not try to perform merging
-  // and treat SHF_MERGE sections as regular ones, but also create different
-  // output sections for them to allow merging at final linking stage.
   uintX_t Alignment = 0;
   if (isa<MergeInputSection<ELFT>>(C) ||
       (Config->Relocatable && (C->Flags & SHF_MERGE)))
     Alignment = std::max<uintX_t>(C->Alignment, C->Entsize);
 
-  return SectionKey<ELFT::Is64Bits>{OutsecName, C->Type, Flags, Alignment};
+  return SectionKey{OutsecName, Flags, Alignment};
 }
 
+template <class ELFT> OutputSectionFactory<ELFT>::OutputSectionFactory() {}
+
+template <class ELFT> OutputSectionFactory<ELFT>::~OutputSectionFactory() {}
+
 template <class ELFT>
 std::pair<OutputSectionBase *, bool>
 OutputSectionFactory<ELFT>::create(InputSectionBase<ELFT> *C,
                                    StringRef OutsecName) {
-  SectionKey<ELFT::Is64Bits> Key = createKey(C, OutsecName);
+  SectionKey Key = createKey(C, OutsecName);
   return create(Key, C);
 }
 
+static uint64_t getIncompatibleFlags(uint64_t Flags) {
+  return Flags & (SHF_ALLOC | SHF_TLS);
+}
+
 template <class ELFT>
 std::pair<OutputSectionBase *, bool>
-OutputSectionFactory<ELFT>::create(const SectionKey<ELFT::Is64Bits> &Key,
+OutputSectionFactory<ELFT>::create(const SectionKey &Key,
                                    InputSectionBase<ELFT> *C) {
   uintX_t Flags = getOutFlags(C);
   OutputSectionBase *&Sec = Map[Key];
   if (Sec) {
+    if (getIncompatibleFlags(Sec->Flags) != getIncompatibleFlags(C->Flags))
+      error("Section has flags incompatible with others with the same name " +
+            toString(C));
+    if (Sec->Type != C->Type)
+      error("Section has different type from others with the same name " +
+            toString(C));
     Sec->Flags |= Flags;
     return {Sec, false};
   }
@@ -588,36 +658,22 @@ OutputSectionFactory<ELFT>::create(const SectionKey<ELFT::Is64Bits> &Key,
   return {Sec, true};
 }
 
-template <bool Is64Bits>
-typename lld::elf::SectionKey<Is64Bits>
-DenseMapInfo<lld::elf::SectionKey<Is64Bits>>::getEmptyKey() {
-  return SectionKey<Is64Bits>{DenseMapInfo<StringRef>::getEmptyKey(), 0, 0, 0};
+SectionKey DenseMapInfo<SectionKey>::getEmptyKey() {
+  return SectionKey{DenseMapInfo<StringRef>::getEmptyKey(), 0, 0};
 }
 
-template <bool Is64Bits>
-typename lld::elf::SectionKey<Is64Bits>
-DenseMapInfo<lld::elf::SectionKey<Is64Bits>>::getTombstoneKey() {
-  return SectionKey<Is64Bits>{DenseMapInfo<StringRef>::getTombstoneKey(), 0, 0,
-                              0};
+SectionKey DenseMapInfo<SectionKey>::getTombstoneKey() {
+  return SectionKey{DenseMapInfo<StringRef>::getTombstoneKey(), 0, 0};
 }
 
-template <bool Is64Bits>
-unsigned
-DenseMapInfo<lld::elf::SectionKey<Is64Bits>>::getHashValue(const Key &Val) {
-  return hash_combine(Val.Name, Val.Type, Val.Flags, Val.Alignment);
+unsigned DenseMapInfo<SectionKey>::getHashValue(const SectionKey &Val) {
+  return hash_combine(Val.Name, Val.Flags, Val.Alignment);
 }
 
-template <bool Is64Bits>
-bool DenseMapInfo<lld::elf::SectionKey<Is64Bits>>::isEqual(const Key &LHS,
-                                                           const Key &RHS) {
+bool DenseMapInfo<SectionKey>::isEqual(const SectionKey &LHS,
+                                       const SectionKey &RHS) {
   return DenseMapInfo<StringRef>::isEqual(LHS.Name, RHS.Name) &&
-         LHS.Type == RHS.Type && LHS.Flags == RHS.Flags &&
-         LHS.Alignment == RHS.Alignment;
-}
-
-namespace llvm {
-template struct DenseMapInfo<SectionKey<true>>;
-template struct DenseMapInfo<SectionKey<false>>;
+         LHS.Flags == RHS.Flags && LHS.Alignment == RHS.Alignment;
 }
 
 namespace lld {
diff --git a/ELF/OutputSections.h b/ELF/OutputSections.h
index 978b1f8191ef..45e1a232e2a9 100644
--- a/ELF/OutputSections.h
+++ b/ELF/OutputSections.h
@@ -217,12 +217,10 @@ template <class ELFT> struct Out {
   static OutputSectionBase *FiniArray;
 };
 
-template <bool Is64Bits> struct SectionKey {
-  typedef typename std::conditional<Is64Bits, uint64_t, uint32_t>::type uintX_t;
+struct SectionKey {
   StringRef Name;
-  uint32_t Type;
-  uintX_t Flags;
-  uintX_t Alignment;
+  uint64_t Flags;
+  uint64_t Alignment;
 };
 
 // This class knows how to create an output section for a given
@@ -232,16 +230,17 @@ template <bool Is64Bits> struct SectionKey {
 template <class ELFT> class OutputSectionFactory {
   typedef typename ELFT::Shdr Elf_Shdr;
   typedef typename ELFT::uint uintX_t;
-  typedef typename elf::SectionKey<ELFT::Is64Bits> Key;
 
 public:
+  OutputSectionFactory();
+  ~OutputSectionFactory();
   std::pair<OutputSectionBase *, bool> create(InputSectionBase<ELFT> *C,
                                               StringRef OutsecName);
-  std::pair<OutputSectionBase *, bool>
-  create(const SectionKey<ELFT::Is64Bits> &Key, InputSectionBase<ELFT> *C);
+  std::pair<OutputSectionBase *, bool> create(const SectionKey &Key,
+                                              InputSectionBase<ELFT> *C);
 
 private:
-  llvm::SmallDenseMap<Key, OutputSectionBase *> Map;
+  llvm::SmallDenseMap<SectionKey, OutputSectionBase *> Map;
 };
 
 template <class ELFT> uint64_t getHeaderSize() {
@@ -265,15 +264,5 @@ template <class ELFT> OutputSectionBase *Out<ELFT>::FiniArray;
 } // namespace elf
 } // namespace lld
 
-namespace llvm {
-template <bool Is64Bits> struct DenseMapInfo<lld::elf::SectionKey<Is64Bits>> {
-  typedef typename lld::elf::SectionKey<Is64Bits> Key;
-
-  static Key getEmptyKey();
-  static Key getTombstoneKey();
-  static unsigned getHashValue(const Key &Val);
-  static bool isEqual(const Key &LHS, const Key &RHS);
-};
-}
 
 #endif
diff --git a/ELF/Symbols.cpp b/ELF/Symbols.cpp
index f168d37bdf0a..72bcff4e0f4d 100644
--- a/ELF/Symbols.cpp
+++ b/ELF/Symbols.cpp
@@ -305,7 +305,7 @@ void elf::printTraceSymbol(Symbol *Sym) {
 }
 
 // Returns a symbol for an error message.
-std::string elf::toString(const SymbolBody &B) {
+std::string lld::toString(const SymbolBody &B) {
   if (Config->Demangle)
     if (Optional<std::string> S = demangle(B.getName()))
       return *S;
diff --git a/ELF/Symbols.h b/ELF/Symbols.h
index cbf8fa81a138..38889571679c 100644
--- a/ELF/Symbols.h
+++ b/ELF/Symbols.h
@@ -453,10 +453,9 @@ inline Symbol *SymbolBody::symbol() {
   return reinterpret_cast<Symbol *>(reinterpret_cast<char *>(this) -
                                     offsetof(Symbol, Body));
 }
-
-std::string toString(const SymbolBody &B);
-
 } // namespace elf
+
+std::string toString(const elf::SymbolBody &B);
 } // namespace lld
 
 #endif
diff --git a/ELF/Target.cpp b/ELF/Target.cpp
index d82e654b9c4c..cb2b178fa849 100644
--- a/ELF/Target.cpp
+++ b/ELF/Target.cpp
@@ -44,6 +44,10 @@ using namespace llvm::object;
 using namespace llvm::support::endian;
 using namespace llvm::ELF;
 
+std::string lld::toString(uint32_t Type) {
+  return getELFRelocationTypeName(elf::Config->EMachine, Type);
+}
+
 namespace lld {
 namespace elf {
 
@@ -52,10 +56,6 @@ TargetInfo *Target;
 static void or32le(uint8_t *P, int32_t V) { write32le(P, read32le(P) | V); }
 static void or32be(uint8_t *P, int32_t V) { write32be(P, read32be(P) | V); }
 
-std::string toString(uint32_t Type) {
-  return getELFRelocationTypeName(Config->EMachine, Type);
-}
-
 template <class ELFT> static std::string getErrorLoc(uint8_t *Loc) {
   for (InputSectionData *D : Symtab<ELFT>::X->Sections) {
     auto *IS = dyn_cast_or_null<InputSection<ELFT>>(D);
diff --git a/ELF/Target.h b/ELF/Target.h
index 156a2c023230..752f9cd5ee4e 100644
--- a/ELF/Target.h
+++ b/ELF/Target.h
@@ -104,13 +104,14 @@ public:
   virtual void relaxTlsLdToLe(uint8_t *Loc, uint32_t Type, uint64_t Val) const;
 };
 
-std::string toString(uint32_t RelType);
 uint64_t getPPC64TocBase();
 uint64_t getAArch64Page(uint64_t Expr);
 
 extern TargetInfo *Target;
 TargetInfo *createTarget();
 }
+
+std::string toString(uint32_t RelType);
 }
 
 #endif
diff --git a/include/lld/Core/Reproduce.h b/include/lld/Core/Reproduce.h
index cf2747493834..1b65f763acee 100644
--- a/include/lld/Core/Reproduce.h
+++ b/include/lld/Core/Reproduce.h
@@ -11,46 +11,15 @@
 #define LLD_CORE_REPRODUCE_H
 
 #include "lld/Core/LLVM.h"
-#include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/StringRef.h"
-#include "llvm/ADT/StringSet.h"
 #include "llvm/Support/Error.h"
 
 namespace llvm {
-
-class raw_fd_ostream;
-
 namespace opt { class Arg; }
-
 }
 
 namespace lld {
 
-// This class creates a .cpio file for --reproduce (ELF) or /linkrepro (COFF).
-//
-// If "--reproduce foo" is given, we create a file "foo.cpio" and
-// copy all input files to the archive, along with a response file
-// to re-run the same command with the same inputs.
-// It is useful for reporting issues to LLD developers.
-//
-// Cpio as a file format is a deliberate choice. It's standardized in
-// POSIX and very easy to create. cpio command is available virtually
-// on all Unix systems. See
-// http://pubs.opengroup.org/onlinepubs/9699919799/utilities/pax.html#tag_20_92_13_07
-// for the format details.
-class CpioFile {
-public:
-  static ErrorOr<CpioFile *> create(StringRef OutputPath);
-  void append(StringRef Path, StringRef Data);
-
-private:
-  CpioFile(std::unique_ptr<llvm::raw_fd_ostream> OS, StringRef Basename);
-
-  std::unique_ptr<llvm::raw_fd_ostream> OS;
-  llvm::StringSet<> Seen;
-  std::string Basename;
-};
-
 // Makes a given pathname an absolute path first, and then remove
 // beginning /. For example, "../foo.o" is converted to "home/john/foo.o",
 // assuming that the current directory is "/home/john/bar".
@@ -64,7 +33,7 @@ std::string quote(StringRef S);
 std::string rewritePath(StringRef S);
 
 // Returns the string form of the given argument.
-std::string stringize(llvm::opt::Arg *Arg);
+std::string toString(llvm::opt::Arg *Arg);
 
 // Replaces backslashes with slashes if Windows.
 std::string convertToUnixPathSeparator(StringRef S);
diff --git a/lib/Core/Reproduce.cpp b/lib/Core/Reproduce.cpp
index 39b0e41c44e5..ab7261fa0e75 100644
--- a/lib/Core/Reproduce.cpp
+++ b/lib/Core/Reproduce.cpp
@@ -8,66 +8,14 @@
 //===----------------------------------------------------------------------===//
 
 #include "lld/Core/Reproduce.h"
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/ADT/Twine.h"
 #include "llvm/Option/Arg.h"
 #include "llvm/Support/Error.h"
 #include "llvm/Support/FileSystem.h"
-#include "llvm/Support/Format.h"
 #include "llvm/Support/Path.h"
 
 using namespace lld;
 using namespace llvm;
-using namespace sys;
-
-CpioFile::CpioFile(std::unique_ptr<raw_fd_ostream> OS, StringRef S)
-    : OS(std::move(OS)), Basename(S) {}
-
-ErrorOr<CpioFile *> CpioFile::create(StringRef OutputPath) {
-  std::string Path = (OutputPath + ".cpio").str();
-  std::error_code EC;
-  auto OS = llvm::make_unique<raw_fd_ostream>(Path, EC, sys::fs::F_None);
-  if (EC)
-    return EC;
-  return new CpioFile(std::move(OS), path::filename(OutputPath));
-}
-
-static void writeMember(raw_fd_ostream &OS, StringRef Path, StringRef Data) {
-  // The c_dev/c_ino pair should be unique according to the spec,
-  // but no one seems to care.
-  OS << "070707";                        // c_magic
-  OS << "000000";                        // c_dev
-  OS << "000000";                        // c_ino
-  OS << "100664";                        // c_mode: C_ISREG | rw-rw-r--
-  OS << "000000";                        // c_uid
-  OS << "000000";                        // c_gid
-  OS << "000001";                        // c_nlink
-  OS << "000000";                        // c_rdev
-  OS << "00000000000";                   // c_mtime
-  OS << format("%06o", Path.size() + 1); // c_namesize
-  OS << format("%011o", Data.size());    // c_filesize
-  OS << Path << '\0';                    // c_name
-  OS << Data;                            // c_filedata
-}
-
-void CpioFile::append(StringRef Path, StringRef Data) {
-  if (!Seen.insert(Path).second)
-    return;
-
-  // Construct an in-archive filename so that /home/foo/bar is stored
-  // as baz/home/foo/bar where baz is the basename of the output file.
-  // (i.e. in that case we are creating baz.cpio.)
-  SmallString<128> Fullpath;
-  path::append(Fullpath, Basename, Path);
-
-  writeMember(*OS, convertToUnixPathSeparator(Fullpath), Data);
-
-  // Print the trailer and seek back.
-  // This way we have a valid archive if we crash.
-  uint64_t Pos = OS->tell();
-  writeMember(*OS, "TRAILER!!!", "");
-  OS->seek(Pos);
-}
+using namespace llvm::sys;
 
 // Makes a given pathname an absolute path first, and then remove
 // beginning /. For example, "../foo.o" is converted to "home/john/foo.o",
@@ -76,7 +24,7 @@ void CpioFile::append(StringRef Path, StringRef Data) {
 // a mess with backslash-as-escape and backslash-as-path-separator.
 std::string lld::relativeToRoot(StringRef Path) {
   SmallString<128> Abs = Path;
-  if (sys::fs::make_absolute(Abs))
+  if (fs::make_absolute(Abs))
     return Path;
   path::remove_dots(Abs, /*remove_dot_dot=*/true);
 
@@ -107,7 +55,7 @@ std::string lld::rewritePath(StringRef S) {
   return S;
 }
 
-std::string lld::stringize(opt::Arg *Arg) {
+std::string lld::toString(opt::Arg *Arg) {
   std::string K = Arg->getSpelling();
   if (Arg->getNumValues() == 0)
     return K;
diff --git a/test/COFF/linkrepro.test b/test/COFF/linkrepro.test
index b3c13764d81d..a1d85a159a72 100644
--- a/test/COFF/linkrepro.test
+++ b/test/COFF/linkrepro.test
@@ -1,6 +1,3 @@
-# cpio fails on windows with "Function not implemented".
-# REQUIRES: shell
-
 # RUN: rm -rf %t.dir
 # RUN: mkdir -p %t.dir/build1 %t.dir/build2 %t.dir/build3
 # RUN: yaml2obj < %p/Inputs/hello32.yaml > %t.obj
@@ -8,7 +5,7 @@
 # RUN: cd %t.dir/build1
 # RUN: lld-link %t.obj %p/Inputs/std32.lib /subsystem:console \
 # RUN:   /entry:main@0 /linkrepro:. /out:%t.exe
-# RUN: cpio -id < repro.cpio
+# RUN: tar xf repro.tar
 # RUN: diff %t.obj repro/%:t.obj
 # RUN: diff %p/Inputs/std32.lib repro/%:p/Inputs/std32.lib
 # RUN: FileCheck %s --check-prefix=RSP < repro/response.txt
@@ -16,7 +13,7 @@
 # RUN: cd %t.dir/build2
 # RUN: lld-link %t.obj /libpath:%p/Inputs /defaultlib:std32 /subsystem:console \
 # RUN:   /entry:main@0 /linkrepro:. /out:%t.exe
-# RUN: cpio -id < repro.cpio
+# RUN: tar xf repro.tar
 # RUN: diff %t.obj repro/%:t.obj
 # RUN: diff %p/Inputs/std32.lib repro/%:p/Inputs/std32.lib
 # RUN: FileCheck %s --check-prefix=RSP < repro/response.txt
@@ -24,7 +21,7 @@
 # RUN: cd %t.dir/build3
 # RUN: env LIB=%p/Inputs lld-link %t.obj /defaultlib:std32 /subsystem:console \
 # RUN:   /entry:main@0 /linkrepro:. /out:%t.exe
-# RUN: cpio -id < repro.cpio
+# RUN: tar xf repro.tar
 # RUN: diff %t.obj repro/%:t.obj
 # RUN: diff %p/Inputs/std32.lib repro/%:p/Inputs/std32.lib
 # RUN: FileCheck %s --check-prefix=RSP < repro/response.txt
diff --git a/test/ELF/incompatible-section-flags.s b/test/ELF/incompatible-section-flags.s
new file mode 100644
index 000000000000..efca31bb9a80
--- /dev/null
+++ b/test/ELF/incompatible-section-flags.s
@@ -0,0 +1,18 @@
+// RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
+// RUN: not ld.lld -shared %t.o -o %t 2>&1 | FileCheck %s
+
+// CHECK: error:  Section has flags incompatible with others with the same name {{.*}}incompatible-section-flags.s.tmp.o:(.foo)
+// CHECK: error:  Section has flags incompatible with others with the same name {{.*}}incompatible-section-flags.s.tmp.o:(.bar)
+
+.section .foo, "awT", @progbits, unique, 1
+.quad 0
+
+.section .foo, "aw", @progbits, unique, 2
+.quad 0
+
+
+.section .bar, "aw", @progbits, unique, 3
+.quad 0
+
+.section .bar, "awT", @progbits, unique, 4
+.quad 0
diff --git a/test/ELF/incompatible-section-types.s b/test/ELF/incompatible-section-types.s
new file mode 100644
index 000000000000..0d075aca068b
--- /dev/null
+++ b/test/ELF/incompatible-section-types.s
@@ -0,0 +1,10 @@
+// RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
+// RUN: not ld.lld -shared %t.o -o %t 2>&1 | FileCheck %s
+
+// CHECK: error: Section has different type from others with the same name {{.*}}incompatible-section-types.s.tmp.o:(.foo)
+
+.section .foo, "aw", @progbits, unique, 1
+.quad 0
+
+.section .foo, "aw", @nobits, unique, 2
+.quad 0
diff --git a/test/ELF/linkerscript/phdrs.s b/test/ELF/linkerscript/phdrs.s
index a7476e802341..025ced95b30a 100644
--- a/test/ELF/linkerscript/phdrs.s
+++ b/test/ELF/linkerscript/phdrs.s
@@ -93,7 +93,7 @@
 
 ## Check the numetic values for PHDRS.
 # RUN: echo "PHDRS {text PT_LOAD FILEHDR PHDRS; foo 0x11223344; } \
-# RUN:       SECTIONS { . = SIZEOF_HEADERS; .foo : { *(.*) } : text : foo}" > %t1.script
+# RUN:       SECTIONS { . = SIZEOF_HEADERS; .foo : { *(.foo* .text*) } : text : foo}" > %t1.script
 # RUN: ld.lld -o %t2 --script %t1.script %t
 # RUN: llvm-readobj -program-headers %t2 | FileCheck --check-prefix=INT-PHDRS %s
 
diff --git a/test/ELF/linkerscript/sections.s b/test/ELF/linkerscript/sections.s
index 416e77346a59..2cb9395e6692 100644
--- a/test/ELF/linkerscript/sections.s
+++ b/test/ELF/linkerscript/sections.s
@@ -20,11 +20,10 @@
 # SEC-DEFAULT: 2 .data         00000020 {{[0-9a-f]*}} DATA
 # SEC-DEFAULT: 3 other         00000003 {{[0-9a-f]*}} DATA
 # SEC-DEFAULT: 4 .bss          00000002 {{[0-9a-f]*}} BSS
-# SEC-DEFAULT: 5 .shstrtab     00000002 {{[0-9a-f]*}}
-# SEC-DEFAULT: 6 .comment      00000008 {{[0-9a-f]*}}
-# SEC-DEFAULT: 7 .symtab       00000030 {{[0-9a-f]*}}
-# SEC-DEFAULT: 8 .shstrtab     0000003b {{[0-9a-f]*}}
-# SEC-DEFAULT: 9 .strtab       00000008 {{[0-9a-f]*}}
+# SEC-DEFAULT: 5 .comment      00000008 {{[0-9a-f]*}}
+# SEC-DEFAULT: 6 .symtab       00000030 {{[0-9a-f]*}}
+# SEC-DEFAULT: 7 .shstrtab     0000003b {{[0-9a-f]*}}
+# SEC-DEFAULT: 8 .strtab       00000008 {{[0-9a-f]*}}
 
 # Sections are put in order specified in linker script, other than alloc
 # sections going first.
@@ -43,12 +42,11 @@
 #           Idx Name          Size
 # SEC-ORDER: 1 .bss          00000002 {{[0-9a-f]*}} BSS
 # SEC-ORDER: 2 other         00000003 {{[0-9a-f]*}} DATA
-# SEC-ORDER: 3 .shstrtab     00000002 {{[0-9a-f]*}}
-# SEC-ORDER: 4 .shstrtab     0000003b {{[0-9a-f]*}}
-# SEC-ORDER: 5 .symtab       00000030 {{[0-9a-f]*}}
-# SEC-ORDER: 6 .strtab       00000008 {{[0-9a-f]*}}
-# SEC-ORDER: 7 .data         00000020 {{[0-9a-f]*}} DATA
-# SEC-ORDER: 8 .text         0000000e {{[0-9a-f]*}} TEXT DATA
+# SEC-ORDER: 3 .shstrtab     0000003b {{[0-9a-f]*}}
+# SEC-ORDER: 4 .symtab       00000030 {{[0-9a-f]*}}
+# SEC-ORDER: 5 .strtab       00000008 {{[0-9a-f]*}}
+# SEC-ORDER: 6 .data         00000020 {{[0-9a-f]*}} DATA
+# SEC-ORDER: 7 .text         0000000e {{[0-9a-f]*}} TEXT DATA
 
 # .text and .data have swapped names but proper sizes and types.
 # RUN: echo "SECTIONS { \
@@ -63,11 +61,10 @@
 # SEC-SWAP-NAMES: 2 .text         00000020 {{[0-9a-f]*}} DATA
 # SEC-SWAP-NAMES: 3 other         00000003 {{[0-9a-f]*}} DATA
 # SEC-SWAP-NAMES: 4 .bss          00000002 {{[0-9a-f]*}} BSS
-# SEC-SWAP-NAMES: 5 .shstrtab     00000002 {{[0-9a-f]*}}
-# SEC-SWAP-NAMES: 6 .comment      00000008 {{[0-9a-f]*}}
-# SEC-SWAP-NAMES: 7 .symtab       00000030 {{[0-9a-f]*}}
-# SEC-SWAP-NAMES: 8 .shstrtab     0000003b {{[0-9a-f]*}}
-# SEC-SWAP-NAMES: 9 .strtab       00000008 {{[0-9a-f]*}}
+# SEC-SWAP-NAMES: 5 .comment      00000008 {{[0-9a-f]*}}
+# SEC-SWAP-NAMES: 6 .symtab       00000030 {{[0-9a-f]*}}
+# SEC-SWAP-NAMES: 7 .shstrtab     0000003b {{[0-9a-f]*}}
+# SEC-SWAP-NAMES: 8 .strtab       00000008 {{[0-9a-f]*}}
 
 # .shstrtab from the input object file is discarded.
 # RUN: echo "SECTIONS { \
@@ -102,11 +99,10 @@
 # SEC-MULTI: 1 .text         0000000e {{[0-9a-f]*}} TEXT DATA
 # SEC-MULTI: 2 .data         00000023 {{[0-9a-f]*}} DATA
 # SEC-MULTI: 3 .bss          00000002 {{[0-9a-f]*}} BSS
-# SEC-MULTI: 4 .shstrtab     00000002 {{[0-9a-f]*}}
-# SEC-MULTI: 5 .comment      00000008 {{[0-9a-f]*}}
-# SEC-MULTI: 6 .symtab       00000030 {{[0-9a-f]*}}
-# SEC-MULTI: 7 .shstrtab     00000035 {{[0-9a-f]*}}
-# SEC-MULTI: 8 .strtab       00000008 {{[0-9a-f]*}}
+# SEC-MULTI: 4 .comment      00000008 {{[0-9a-f]*}}
+# SEC-MULTI: 5 .symtab       00000030 {{[0-9a-f]*}}
+# SEC-MULTI: 6 .shstrtab     00000035 {{[0-9a-f]*}}
+# SEC-MULTI: 7 .strtab       00000008 {{[0-9a-f]*}}
 
 .globl _start
 _start:
@@ -118,7 +114,5 @@ _start:
 .section other,"aw"
 .short 10
 .byte 20
-.section .shstrtab,""
-.short 20
 .section .bss,"",@nobits
 .short 0
diff --git a/test/ELF/reproduce-backslash.s b/test/ELF/reproduce-backslash.s
index 849c8f8fb3dd..53feb5ff3223 100644
--- a/test/ELF/reproduce-backslash.s
+++ b/test/ELF/reproduce-backslash.s
@@ -1,9 +1,9 @@
-# REQUIRES: x86, cpio, shell
+# REQUIRES: x86, shell
 
 # Test that we don't erroneously replace \ with / on UNIX, as it's
 # legal for a filename to contain backslashes.
 # RUN: llvm-mc %s -o foo\\.o -filetype=obj -triple=x86_64-pc-linux
-# RUN: ld.lld foo\\.o --reproduce repro
-# RUN: cpio -it < repro.cpio | FileCheck %s
+# RUN: ld.lld foo\\.o --reproduce repro.tar
+# RUN: tar tf repro.tar | FileCheck %s
 
-# CHECK: repro/{{.*}}/foo\.o
+# CHECK: repro/{{.*}}/foo\\.o
diff --git a/test/ELF/reproduce-error.s b/test/ELF/reproduce-error.s
index c66132c4bd01..e2de8a4feeba 100644
--- a/test/ELF/reproduce-error.s
+++ b/test/ELF/reproduce-error.s
@@ -1,15 +1,14 @@
-# Extracting the cpio archive can get over the path limit on windows.
+# Extracting the tar archive can get over the path limit on windows.
 # REQUIRES: shell
 
 # RUN: rm -rf %t.dir
 # RUN: mkdir -p %t.dir
 # RUN: cd %t.dir
 
-# RUN: not ld.lld --reproduce repro abc -o t 2>&1 | FileCheck %s
+# RUN: not ld.lld --reproduce repro.tar abc -o t 2>&1 | FileCheck %s
 # CHECK: cannot open abc: {{N|n}}o such file or directory
 
-# RUN: grep TRAILER repro.cpio
-# RUN: cpio -id < repro.cpio
+# RUN: tar xf repro.tar
 # RUN: FileCheck --check-prefix=RSP %s < repro/response.txt
 # RSP: abc
 # RSP: -o t
diff --git a/test/ELF/reproduce-linkerscript.s b/test/ELF/reproduce-linkerscript.s
index a020fcc9a4f1..1938e2b6cf94 100644
--- a/test/ELF/reproduce-linkerscript.s
+++ b/test/ELF/reproduce-linkerscript.s
@@ -5,8 +5,8 @@
 # RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t.dir/build/foo.o
 # RUN: echo "INPUT(\"%t.dir/build/foo.o\")" > %t.dir/build/foo.script
 # RUN: cd %t.dir
-# RUN: ld.lld build/foo.script -o bar --reproduce repro
-# RUN: cpio -id < repro.cpio
+# RUN: ld.lld build/foo.script -o bar --reproduce repro.tar
+# RUN: tar xf repro.tar
 # RUN: diff build/foo.script repro/%:t.dir/build/foo.script
 # RUN: diff build/foo.o repro/%:t.dir/build/foo.o
 
diff --git a/test/ELF/reproduce-thin-archive.s b/test/ELF/reproduce-thin-archive.s
index 0797b6c67e9c..2de88d77f51b 100644
--- a/test/ELF/reproduce-thin-archive.s
+++ b/test/ELF/reproduce-thin-archive.s
@@ -5,8 +5,8 @@
 # RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.dir/foo.o
 # RUN: cd %t.dir
 # RUN: llvm-ar --format=gnu rcT foo.a foo.o
-# RUN: ld.lld -m elf_x86_64 foo.a -o bar --reproduce repro
-# RUN: cpio -id < repro.cpio
+# RUN: ld.lld -m elf_x86_64 foo.a -o bar --reproduce repro.tar
+# RUN: tar xf repro.tar
 # RUN: diff foo.a repro/%:t.dir/foo.a
 # RUN: diff foo.o repro/%:t.dir/foo.o
 
diff --git a/test/ELF/reproduce-windows.s b/test/ELF/reproduce-windows.s
index 4825a8a95e78..6dd1fe2eeadb 100644
--- a/test/ELF/reproduce-windows.s
+++ b/test/ELF/reproduce-windows.s
@@ -1,12 +1,12 @@
-# REQUIRES: x86, cpio
+# REQUIRES: x86
 
 # Test that a repro archive always uses / instead of \.
 # RUN: rm -rf %t.dir
 # RUN: mkdir -p %t.dir/build
 # RUN: llvm-mc %s -o %t.dir/build/foo.o -filetype=obj -triple=x86_64-pc-linux
 # RUN: cd %t.dir
-# RUN: ld.lld build/foo.o --reproduce repro
-# RUN: cpio -it < repro.cpio | FileCheck %s
+# RUN: ld.lld build/foo.o --reproduce repro.tar
+# RUN: tar tf repro.tar | FileCheck %s
 
 # CHECK: repro/response.txt
 # CHECK: repro/{{.*}}/build/foo.o
diff --git a/test/ELF/reproduce-windows2.s b/test/ELF/reproduce-windows2.s
index d428288a3640..38e00247eaf1 100644
--- a/test/ELF/reproduce-windows2.s
+++ b/test/ELF/reproduce-windows2.s
@@ -1,11 +1,10 @@
-# REQUIRES: system-windows, x86, cpio
+# REQUIRES: system-windows, x86
 
 # Test that a response.txt file always uses / instead of \.
 # RUN: rm -rf %t.dir
 # RUN: mkdir -p %t.dir/build
 # RUN: llvm-mc %s -o %t.dir/build/foo.o -filetype=obj -triple=x86_64-pc-linux
 # RUN: cd %t.dir
-# RUN: ld.lld build/foo.o --reproduce repro
-# RUN: echo "*response.txt" > list.txt
-# RUN: cpio -i --to-stdout --pattern-file=list.txt < repro.cpio | FileCheck %s
+# RUN: ld.lld build/foo.o --reproduce repro.tar
+# RUN: tar -O -x -f repro.tar repro/response.txt | FileCheck %s
 # CHECK: {{.*}}/build/foo.o
diff --git a/test/ELF/reproduce.s b/test/ELF/reproduce.s
index 471a0f82da44..c7955e02a822 100644
--- a/test/ELF/reproduce.s
+++ b/test/ELF/reproduce.s
@@ -1,14 +1,14 @@
-# REQUIRES: x86, cpio
+# REQUIRES: x86
 
-# Extracting the cpio archive can get over the path limit on windows.
+# Extracting the tar archive can get over the path limit on windows.
 # REQUIRES: shell
 
 # RUN: rm -rf %t.dir
 # RUN: mkdir -p %t.dir/build1
 # RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t.dir/build1/foo.o
 # RUN: cd %t.dir
-# RUN: ld.lld --hash-style=gnu build1/foo.o -o bar -shared --as-needed --reproduce repro
-# RUN: cpio -id < repro.cpio
+# RUN: ld.lld --hash-style=gnu build1/foo.o -o bar -shared --as-needed --reproduce repro.tar
+# RUN: tar xf repro.tar
 # RUN: diff build1/foo.o repro/%:t.dir/build1/foo.o
 
 # RUN: FileCheck %s --check-prefix=RSP < repro/response.txt
@@ -25,8 +25,8 @@
 # RUN: mkdir -p %t.dir/build2/a/b/c
 # RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t.dir/build2/foo.o
 # RUN: cd %t.dir/build2/a/b/c
-# RUN: env LLD_REPRODUCE=repro ld.lld ./../../../foo.o -o bar -shared --as-needed
-# RUN: cpio -id < repro.cpio
+# RUN: env LLD_REPRODUCE=repro.tar ld.lld ./../../../foo.o -o bar -shared --as-needed
+# RUN: tar xf repro.tar
 # RUN: diff %t.dir/build2/foo.o repro/%:t.dir/build2/foo.o
 
 # RUN: echo "{ local: *; };" >  ver
@@ -34,10 +34,10 @@
 # RUN: echo > file
 # RUN: echo > file2
 # RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o 'foo bar'
-# RUN: ld.lld --reproduce repro2 'foo bar' -L"foo bar" -Lfile -Tfile2 \
+# RUN: ld.lld --reproduce repro2.tar 'foo bar' -L"foo bar" -Lfile -Tfile2 \
 # RUN:   --dynamic-list dyn -rpath file --script=file --version-script ver \
 # RUN:   --dynamic-linker "some unusual/path" -soname 'foo bar' -soname='foo bar'
-# RUN: cpio -id < repro2.cpio
+# RUN: tar xf repro2.tar
 # RUN: FileCheck %s --check-prefix=RSP2 < repro2/response.txt
 # RSP2:      "{{.*}}foo bar"
 # RSP2-NEXT: -L "{{.*}}foo bar"
@@ -51,7 +51,7 @@
 # RSP2-NEXT: -soname="foo bar"
 # RSP2-NEXT: -soname="foo bar"
 
-# RUN: cpio -it < repro2.cpio | FileCheck %s
+# RUN: tar tf repro2.tar | FileCheck %s
 # CHECK:      repro2/response.txt
 # CHECK-NEXT: repro2/version.txt
 # CHECK-NEXT: repro2/{{.*}}/dyn
diff --git a/test/ELF/section-name.s b/test/ELF/section-name.s
index 53f0e536f3d6..06d741b2ea77 100644
--- a/test/ELF/section-name.s
+++ b/test/ELF/section-name.s
@@ -19,9 +19,9 @@ _start:
 .byte 0
 .section .data,"aw"
 .byte 0
-.section .bss.a,"",@nobits
+.section .bss.a,"aw",@nobits
 .byte 0
-.section .bss,"",@nobits
+.section .bss,"aw",@nobits
 .byte 0
 .section .foo.a,"aw"
 .byte 0
@@ -51,9 +51,8 @@ _start:
 // CHECK:  7 .data         00000002
 // CHECK:  8 .foo.a        00000001
 // CHECK:  9 .foo          00000001
-// CHECK: 10 .bss          00000001
-// CHECK: 11 .bss          00000001
-// CHECK: 12 .comment      00000008
-// CHECK: 13 .symtab       00000060
-// CHECK: 14 .shstrtab     00000075
-// CHECK: 15 .strtab       0000001d
+// CHECK: 10 .bss          00000002
+// CHECK: 11 .comment      00000008
+// CHECK: 12 .symtab       00000060
+// CHECK: 13 .shstrtab     00000075
+// CHECK: 14 .strtab       0000001d
diff --git a/test/ELF/string-table.s b/test/ELF/string-table.s
index 92b8345976d8..490c4d574cf1 100644
--- a/test/ELF/string-table.s
+++ b/test/ELF/string-table.s
@@ -6,10 +6,7 @@
 .global _start
 _start:
 
-.section        foobar,"",@progbits,unique,1
-.section        foobar,"T",@progbits,unique,2
-.section        foobar,"",@nobits,unique,3
-.section        foobar,"",@nobits,unique,4
+.section        foobar,"",@progbits
 
 .section bar, "a"
 
@@ -27,17 +24,4 @@ _start:
 // CHECK-NEXT: ]
 // CHECK-NEXT: Address: 0x0
 
-// CHECK:      Name: foobar
-// CHECK-NEXT: Type: SHT_PROGBITS
-// CHECK-NEXT: Flags [
-// CHECK-NEXT:   SHF_TLS
-// CHECK-NEXT: ]
-// CHECK-NEXT: Address: 0x0
-
-// CHECK:      Name: foobar
-// CHECK-NEXT: Type: SHT_NOBITS
-// CHECK-NEXT: Flags [
-// CHECK-NEXT: ]
-// CHECK-NEXT: Address: 0x0
-
 // CHECK-NOT:  Name: foobar
diff --git a/test/ELF/undef.s b/test/ELF/undef.s
index 5fcd75f948b0..d0f95a3b6381 100644
--- a/test/ELF/undef.s
+++ b/test/ELF/undef.s
@@ -9,9 +9,9 @@
 # CHECK: error: undef.s:(.text+0x6): undefined symbol 'bar'
 # CHECK: error: undef.s:(.text+0x10): undefined symbol 'foo(int)'
 # CHECK: error: {{.*}}2.a({{.*}}.o):(.text+0x0): undefined symbol 'zed2'
-# CHECK: error: dir/undef-debug.s:3: undefined symbol 'zed3'
-# CHECK: error: dir/undef-debug.s:7: undefined symbol 'zed4'
-# CHECK: error: dir/undef-debug.s:11: undefined symbol 'zed5'
+# CHECK: error: dir{{/|\\}}undef-debug.s:3: undefined symbol 'zed3'
+# CHECK: error: dir{{/|\\}}undef-debug.s:7: undefined symbol 'zed4'
+# CHECK: error: dir{{/|\\}}undef-debug.s:11: undefined symbol 'zed5'
 
 # RUN: not ld.lld %t.o %t2.a -o %t.exe -no-demangle 2>&1 | \
 # RUN:   FileCheck -check-prefix=NO-DEMANGLE %s
diff --git a/test/lit.cfg b/test/lit.cfg
index a4105b34e122..0db879312413 100644
--- a/test/lit.cfg
+++ b/test/lit.cfg
@@ -258,7 +258,3 @@ cvtres = lit.util.which('cvtres', config.environment['PATH'])
 rc = lit.util.which('rc', config.environment['PATH'])
 if cvtres and rc:
     config.available_features.add('winres')
-
-# Check if "cpio" command exists.
-if lit.util.which('cpio', config.environment['PATH']):
-    config.available_features.add('cpio')