Remove LLVM 8.0.1 files.

1 files changed, 0 insertions, 1345 deletions

diff --git a/gnu/llvm/tools/lld/ELF/InputFiles.cpp b/gnu/llvm/tools/lld/ELF/InputFiles.cpp
deleted file mode 100644
index bc7e61072e6..00000000000
--- a/gnu/llvm/tools/lld/ELF/InputFiles.cpp
+++ /dev/null
@@ -1,1345 +0,0 @@
-//===- InputFiles.cpp -----------------------------------------------------===//
-//
-//                             The LLVM Linker
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "InputFiles.h"
-#include "InputSection.h"
-#include "LinkerScript.h"
-#include "SymbolTable.h"
-#include "Symbols.h"
-#include "SyntheticSections.h"
-#include "lld/Common/ErrorHandler.h"
-#include "lld/Common/Memory.h"
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/CodeGen/Analysis.h"
-#include "llvm/DebugInfo/DWARF/DWARFContext.h"
-#include "llvm/IR/LLVMContext.h"
-#include "llvm/IR/Module.h"
-#include "llvm/LTO/LTO.h"
-#include "llvm/MC/StringTableBuilder.h"
-#include "llvm/Object/ELFObjectFile.h"
-#include "llvm/Support/ARMAttributeParser.h"
-#include "llvm/Support/ARMBuildAttributes.h"
-#include "llvm/Support/Path.h"
-#include "llvm/Support/TarWriter.h"
-#include "llvm/Support/raw_ostream.h"
-
-using namespace llvm;
-using namespace llvm::ELF;
-using namespace llvm::object;
-using namespace llvm::sys;
-using namespace llvm::sys::fs;
-
-using namespace lld;
-using namespace lld::elf;
-
-bool InputFile::IsInGroup;
-uint32_t InputFile::NextGroupId;
-std::vector<BinaryFile *> elf::BinaryFiles;
-std::vector<BitcodeFile *> elf::BitcodeFiles;
-std::vector<LazyObjFile *> elf::LazyObjFiles;
-std::vector<InputFile *> elf::ObjectFiles;
-std::vector<InputFile *> elf::SharedFiles;
-
-std::unique_ptr<TarWriter> elf::Tar;
-
-InputFile::InputFile(Kind K, MemoryBufferRef M)
-    : MB(M), GroupId(NextGroupId), FileKind(K) {
-  // All files within the same --{start,end}-group get the same group ID.
-  // Otherwise, a new file will get a new group ID.
-  if (!IsInGroup)
-    ++NextGroupId;
-}
-
-Optional<MemoryBufferRef> elf::readFile(StringRef Path) {
-  // The --chroot option changes our virtual root directory.
-  // This is useful when you are dealing with files created by --reproduce.
-  if (!Config->Chroot.empty() && Path.startswith("/"))
-    Path = Saver.save(Config->Chroot + Path);
-
-  log(Path);
-
-  auto MBOrErr = MemoryBuffer::getFile(Path, -1, false);
-  if (auto EC = MBOrErr.getError()) {
-    error("cannot open " + Path + ": " + EC.message());
-    return None;
-  }
-
-  std::unique_ptr<MemoryBuffer> &MB = *MBOrErr;
-  MemoryBufferRef MBRef = MB->getMemBufferRef();
-  make<std::unique_ptr<MemoryBuffer>>(std::move(MB)); // take MB ownership
-
-  if (Tar)
-    Tar->append(relativeToRoot(Path), MBRef.getBuffer());
-  return MBRef;
-}
-
-// Concatenates arguments to construct a string representing an error location.
-static std::string createFileLineMsg(StringRef Path, unsigned Line) {
-  std::string Filename = path::filename(Path);
-  std::string Lineno = ":" + std::to_string(Line);
-  if (Filename == Path)
-    return Filename + Lineno;
-  return Filename + Lineno + " (" + Path.str() + Lineno + ")";
-}
-
-template <class ELFT>
-static std::string getSrcMsgAux(ObjFile<ELFT> &File, const Symbol &Sym,
-                                InputSectionBase &Sec, uint64_t Offset) {
-  // In DWARF, functions and variables are stored to different places.
-  // First, lookup a function for a given offset.
-  if (Optional<DILineInfo> Info = File.getDILineInfo(&Sec, Offset))
-    return createFileLineMsg(Info->FileName, Info->Line);
-
-  // If it failed, lookup again as a variable.
-  if (Optional<std::pair<std::string, unsigned>> FileLine =
-          File.getVariableLoc(Sym.getName()))
-    return createFileLineMsg(FileLine->first, FileLine->second);
-
-  // File.SourceFile contains STT_FILE symbol, and that is a last resort.
-  return File.SourceFile;
-}
-
-std::string InputFile::getSrcMsg(const Symbol &Sym, InputSectionBase &Sec,
-                                 uint64_t Offset) {
-  if (kind() != ObjKind)
-    return "";
-  switch (Config->EKind) {
-  default:
-    llvm_unreachable("Invalid kind");
-  case ELF32LEKind:
-    return getSrcMsgAux(cast<ObjFile<ELF32LE>>(*this), Sym, Sec, Offset);
-  case ELF32BEKind:
-    return getSrcMsgAux(cast<ObjFile<ELF32BE>>(*this), Sym, Sec, Offset);
-  case ELF64LEKind:
-    return getSrcMsgAux(cast<ObjFile<ELF64LE>>(*this), Sym, Sec, Offset);
-  case ELF64BEKind:
-    return getSrcMsgAux(cast<ObjFile<ELF64BE>>(*this), Sym, Sec, Offset);
-  }
-}
-
-template <class ELFT> void ObjFile<ELFT>::initializeDwarf() {
-  Dwarf = llvm::make_unique<DWARFContext>(make_unique<LLDDwarfObj<ELFT>>(this));
-  for (std::unique_ptr<DWARFUnit> &CU : Dwarf->compile_units()) {
-    auto Report = [](Error Err) {
-      handleAllErrors(std::move(Err),
-                      [](ErrorInfoBase &Info) { warn(Info.message()); });
-    };
-    Expected<const DWARFDebugLine::LineTable *> ExpectedLT =
-        Dwarf->getLineTableForUnit(CU.get(), Report);
-    const DWARFDebugLine::LineTable *LT = nullptr;
-    if (ExpectedLT)
-      LT = *ExpectedLT;
-    else
-      Report(ExpectedLT.takeError());
-    if (!LT)
-      continue;
-    LineTables.push_back(LT);
-
-    // Loop over variable records and insert them to VariableLoc.
-    for (const auto &Entry : CU->dies()) {
-      DWARFDie Die(CU.get(), &Entry);
-      // Skip all tags that are not variables.
-      if (Die.getTag() != dwarf::DW_TAG_variable)
-        continue;
-
-      // Skip if a local variable because we don't need them for generating
-      // error messages. In general, only non-local symbols can fail to be
-      // linked.
-      if (!dwarf::toUnsigned(Die.find(dwarf::DW_AT_external), 0))
-        continue;
-
-      // Get the source filename index for the variable.
-      unsigned File = dwarf::toUnsigned(Die.find(dwarf::DW_AT_decl_file), 0);
-      if (!LT->hasFileAtIndex(File))
-        continue;
-
-      // Get the line number on which the variable is declared.
-      unsigned Line = dwarf::toUnsigned(Die.find(dwarf::DW_AT_decl_line), 0);
-
-      // Here we want to take the variable name to add it into VariableLoc.
-      // Variable can have regular and linkage name associated. At first, we try
-      // to get linkage name as it can be different, for example when we have
-      // two variables in different namespaces of the same object. Use common
-      // name otherwise, but handle the case when it also absent in case if the
-      // input object file lacks some debug info.
-      StringRef Name =
-          dwarf::toString(Die.find(dwarf::DW_AT_linkage_name),
-                          dwarf::toString(Die.find(dwarf::DW_AT_name), ""));
-      if (!Name.empty())
-        VariableLoc.insert({Name, {LT, File, Line}});
-    }
-  }
-}
-
-// Returns the pair of file name and line number describing location of data
-// object (variable, array, etc) definition.
-template <class ELFT>
-Optional<std::pair<std::string, unsigned>>
-ObjFile<ELFT>::getVariableLoc(StringRef Name) {
-  llvm::call_once(InitDwarfLine, [this]() { initializeDwarf(); });
-
-  // Return if we have no debug information about data object.
-  auto It = VariableLoc.find(Name);
-  if (It == VariableLoc.end())
-    return None;
-
-  // Take file name string from line table.
-  std::string FileName;
-  if (!It->second.LT->getFileNameByIndex(
-          It->second.File, nullptr,
-          DILineInfoSpecifier::FileLineInfoKind::AbsoluteFilePath, FileName))
-    return None;
-
-  return std::make_pair(FileName, It->second.Line);
-}
-
-// Returns source line information for a given offset
-// using DWARF debug info.
-template <class ELFT>
-Optional<DILineInfo> ObjFile<ELFT>::getDILineInfo(InputSectionBase *S,
-                                                  uint64_t Offset) {
-  llvm::call_once(InitDwarfLine, [this]() { initializeDwarf(); });
-
-  // Use fake address calcuated by adding section file offset and offset in
-  // section. See comments for ObjectInfo class.
-  DILineInfo Info;
-  for (const llvm::DWARFDebugLine::LineTable *LT : LineTables)
-    if (LT->getFileLineInfoForAddress(
-            S->getOffsetInFile() + Offset, nullptr,
-            DILineInfoSpecifier::FileLineInfoKind::AbsoluteFilePath, Info))
-      return Info;
-  return None;
-}
-
-// Returns "<internal>", "foo.a(bar.o)" or "baz.o".
-std::string lld::toString(const InputFile *F) {
-  if (!F)
-    return "<internal>";
-
-  if (F->ToStringCache.empty()) {
-    if (F->ArchiveName.empty())
-      F->ToStringCache = F->getName();
-    else
-      F->ToStringCache = (F->ArchiveName + "(" + F->getName() + ")").str();
-  }
-  return F->ToStringCache;
-}
-
-template <class ELFT>
-ELFFileBase<ELFT>::ELFFileBase(Kind K, MemoryBufferRef MB) : InputFile(K, MB) {
-  if (ELFT::TargetEndianness == support::little)
-    EKind = ELFT::Is64Bits ? ELF64LEKind : ELF32LEKind;
-  else
-    EKind = ELFT::Is64Bits ? ELF64BEKind : ELF32BEKind;
-
-  EMachine = getObj().getHeader()->e_machine;
-  OSABI = getObj().getHeader()->e_ident[llvm::ELF::EI_OSABI];
-}
-
-template <class ELFT>
-typename ELFT::SymRange ELFFileBase<ELFT>::getGlobalELFSyms() {
-  return makeArrayRef(ELFSyms.begin() + FirstGlobal, ELFSyms.end());
-}
-
-template <class ELFT>
-uint32_t ELFFileBase<ELFT>::getSectionIndex(const Elf_Sym &Sym) const {
-  return CHECK(getObj().getSectionIndex(&Sym, ELFSyms, SymtabSHNDX), this);
-}
-
-template <class ELFT>
-void ELFFileBase<ELFT>::initSymtab(ArrayRef<Elf_Shdr> Sections,
-                                   const Elf_Shdr *Symtab) {
-  FirstGlobal = Symtab->sh_info;
-  ELFSyms = CHECK(getObj().symbols(Symtab), this);
-  if (FirstGlobal == 0 || FirstGlobal > ELFSyms.size())
-    fatal(toString(this) + ": invalid sh_info in symbol table");
-
-  StringTable =
-      CHECK(getObj().getStringTableForSymtab(*Symtab, Sections), this);
-}
-
-template <class ELFT>
-ObjFile<ELFT>::ObjFile(MemoryBufferRef M, StringRef ArchiveName)
-    : ELFFileBase<ELFT>(Base::ObjKind, M) {
-  this->ArchiveName = ArchiveName;
-}
-
-template <class ELFT> ArrayRef<Symbol *> ObjFile<ELFT>::getLocalSymbols() {
-  if (this->Symbols.empty())
-    return {};
-  return makeArrayRef(this->Symbols).slice(1, this->FirstGlobal - 1);
-}
-
-template <class ELFT> ArrayRef<Symbol *> ObjFile<ELFT>::getGlobalSymbols() {
-  return makeArrayRef(this->Symbols).slice(this->FirstGlobal);
-}
-
-template <class ELFT>
-void ObjFile<ELFT>::parse(DenseSet<CachedHashStringRef> &ComdatGroups) {
-  // Read a section table. JustSymbols is usually false.
-  if (this->JustSymbols)
-    initializeJustSymbols();
-  else
-    initializeSections(ComdatGroups);
-
-  // Read a symbol table.
-  initializeSymbols();
-}
-
-// Sections with SHT_GROUP and comdat bits define comdat section groups.
-// They are identified and deduplicated by group name. This function
-// returns a group name.
-template <class ELFT>
-StringRef ObjFile<ELFT>::getShtGroupSignature(ArrayRef<Elf_Shdr> Sections,
-                                              const Elf_Shdr &Sec) {
-  // Group signatures are stored as symbol names in object files.
-  // sh_info contains a symbol index, so we fetch a symbol and read its name.
-  if (this->ELFSyms.empty())
-    this->initSymtab(
-        Sections, CHECK(object::getSection<ELFT>(Sections, Sec.sh_link), this));
-
-  const Elf_Sym *Sym =
-      CHECK(object::getSymbol<ELFT>(this->ELFSyms, Sec.sh_info), this);
-  StringRef Signature = CHECK(Sym->getName(this->StringTable), this);
-
-  // As a special case, if a symbol is a section symbol and has no name,
-  // we use a section name as a signature.
-  //
-  // Such SHT_GROUP sections are invalid from the perspective of the ELF
-  // standard, but GNU gold 1.14 (the newest version as of July 2017) or
-  // older produce such sections as outputs for the -r option, so we need
-  // a bug-compatibility.
-  if (Signature.empty() && Sym->getType() == STT_SECTION)
-    return getSectionName(Sec);
-  return Signature;
-}
-
-template <class ELFT> bool ObjFile<ELFT>::shouldMerge(const Elf_Shdr &Sec) {
-  // On a regular link we don't merge sections if -O0 (default is -O1). This
-  // sometimes makes the linker significantly faster, although the output will
-  // be bigger.
-  //
-  // Doing the same for -r would create a problem as it would combine sections
-  // with different sh_entsize. One option would be to just copy every SHF_MERGE
-  // section as is to the output. While this would produce a valid ELF file with
-  // usable SHF_MERGE sections, tools like (llvm-)?dwarfdump get confused when
-  // they see two .debug_str. We could have separate logic for combining
-  // SHF_MERGE sections based both on their name and sh_entsize, but that seems
-  // to be more trouble than it is worth. Instead, we just use the regular (-O1)
-  // logic for -r.
-  if (Config->Optimize == 0 && !Config->Relocatable)
-    return false;
-
-  // A mergeable section with size 0 is useless because they don't have
-  // any data to merge. A mergeable string section with size 0 can be
-  // argued as invalid because it doesn't end with a null character.
-  // We'll avoid a mess by handling them as if they were non-mergeable.
-  if (Sec.sh_size == 0)
-    return false;
-
-  // Check for sh_entsize. The ELF spec is not clear about the zero
-  // sh_entsize. It says that "the member [sh_entsize] contains 0 if
-  // the section does not hold a table of fixed-size entries". We know
-  // that Rust 1.13 produces a string mergeable section with a zero
-  // sh_entsize. Here we just accept it rather than being picky about it.
-  uint64_t EntSize = Sec.sh_entsize;
-  if (EntSize == 0)
-    return false;
-  if (Sec.sh_size % EntSize)
-    fatal(toString(this) +
-          ": SHF_MERGE section size must be a multiple of sh_entsize");
-
-  uint64_t Flags = Sec.sh_flags;
-  if (!(Flags & SHF_MERGE))
-    return false;
-  if (Flags & SHF_WRITE)
-    fatal(toString(this) + ": writable SHF_MERGE section is not supported");
-
-  return true;
-}
-
-// This is for --just-symbols.
-//
-// --just-symbols is a very minor feature that allows you to link your
-// output against other existing program, so that if you load both your
-// program and the other program into memory, your output can refer the
-// other program's symbols.
-//
-// When the option is given, we link "just symbols". The section table is
-// initialized with null pointers.
-template <class ELFT> void ObjFile<ELFT>::initializeJustSymbols() {
-  ArrayRef<Elf_Shdr> ObjSections = CHECK(this->getObj().sections(), this);
-  this->Sections.resize(ObjSections.size());
-
-  for (const Elf_Shdr &Sec : ObjSections) {
-    if (Sec.sh_type != SHT_SYMTAB)
-      continue;
-    this->initSymtab(ObjSections, &Sec);
-    return;
-  }
-}
-
-template <class ELFT>
-void ObjFile<ELFT>::initializeSections(
-    DenseSet<CachedHashStringRef> &ComdatGroups) {
-  const ELFFile<ELFT> &Obj = this->getObj();
-
-  ArrayRef<Elf_Shdr> ObjSections = CHECK(Obj.sections(), this);
-  uint64_t Size = ObjSections.size();
-  this->Sections.resize(Size);
-  this->SectionStringTable =
-      CHECK(Obj.getSectionStringTable(ObjSections), this);
-
-  for (size_t I = 0, E = ObjSections.size(); I < E; I++) {
-    if (this->Sections[I] == &InputSection::Discarded)
-      continue;
-    const Elf_Shdr &Sec = ObjSections[I];
-
-    if (Sec.sh_type == ELF::SHT_LLVM_CALL_GRAPH_PROFILE)
-      CGProfile = check(
-          this->getObj().template getSectionContentsAsArray<Elf_CGProfile>(
-              &Sec));
-
-    // SHF_EXCLUDE'ed sections are discarded by the linker. However,
-    // if -r is given, we'll let the final link discard such sections.
-    // This is compatible with GNU.
-    if ((Sec.sh_flags & SHF_EXCLUDE) && !Config->Relocatable) {
-      if (Sec.sh_type == SHT_LLVM_ADDRSIG) {
-        // We ignore the address-significance table if we know that the object
-        // file was created by objcopy or ld -r. This is because these tools
-        // will reorder the symbols in the symbol table, invalidating the data
-        // in the address-significance table, which refers to symbols by index.
-        if (Sec.sh_link != 0)
-          this->AddrsigSec = &Sec;
-        else if (Config->ICF == ICFLevel::Safe)
-          warn(toString(this) + ": --icf=safe is incompatible with object "
-                                "files created using objcopy or ld -r");
-      }
-      this->Sections[I] = &InputSection::Discarded;
-      continue;
-    }
-
-    switch (Sec.sh_type) {
-    case SHT_GROUP: {
-      // De-duplicate section groups by their signatures.
-      StringRef Signature = getShtGroupSignature(ObjSections, Sec);
-      this->Sections[I] = &InputSection::Discarded;
-
-
-      ArrayRef<Elf_Word> Entries =
-          CHECK(Obj.template getSectionContentsAsArray<Elf_Word>(&Sec), this);
-      if (Entries.empty())
-        fatal(toString(this) + ": empty SHT_GROUP");
-
-      // The first word of a SHT_GROUP section contains flags. Currently,
-      // the standard defines only "GRP_COMDAT" flag for the COMDAT group.
-      // An group with the empty flag doesn't define anything; such sections
-      // are just skipped.
-      if (Entries[0] == 0)
-        continue;
-
-      if (Entries[0] != GRP_COMDAT)
-        fatal(toString(this) + ": unsupported SHT_GROUP format");
-
-      bool IsNew = ComdatGroups.insert(CachedHashStringRef(Signature)).second;
-      if (IsNew) {
-        if (Config->Relocatable)
-          this->Sections[I] = createInputSection(Sec);
-	continue;
-      }
-
-
-      // Otherwise, discard group members.
-      for (uint32_t SecIndex : Entries.slice(1)) {
-        if (SecIndex >= Size)
-          fatal(toString(this) +
-                ": invalid section index in group: " + Twine(SecIndex));
-        this->Sections[SecIndex] = &InputSection::Discarded;
-      }
-      break;
-    }
-    case SHT_SYMTAB:
-      this->initSymtab(ObjSections, &Sec);
-      break;
-    case SHT_SYMTAB_SHNDX:
-      this->SymtabSHNDX = CHECK(Obj.getSHNDXTable(Sec, ObjSections), this);
-      break;
-    case SHT_STRTAB:
-    case SHT_NULL:
-      break;
-    default:
-      this->Sections[I] = createInputSection(Sec);
-    }
-
-    // .ARM.exidx sections have a reverse dependency on the InputSection they
-    // have a SHF_LINK_ORDER dependency, this is identified by the sh_link.
-    if (Sec.sh_flags & SHF_LINK_ORDER) {
-      InputSectionBase *LinkSec = nullptr;
-      if (Sec.sh_link < this->Sections.size())
-        LinkSec = this->Sections[Sec.sh_link];
-      if (!LinkSec)
-        fatal(toString(this) +
-              ": invalid sh_link index: " + Twine(Sec.sh_link));
-
-      InputSection *IS = cast<InputSection>(this->Sections[I]);
-      LinkSec->DependentSections.push_back(IS);
-      if (!isa<InputSection>(LinkSec))
-        error("a section " + IS->Name +
-              " with SHF_LINK_ORDER should not refer a non-regular "
-              "section: " +
-              toString(LinkSec));
-    }
-  }
-}
-
-// For ARM only, to set the EF_ARM_ABI_FLOAT_SOFT or EF_ARM_ABI_FLOAT_HARD
-// flag in the ELF Header we need to look at Tag_ABI_VFP_args to find out how
-// the input objects have been compiled.
-static void updateARMVFPArgs(const ARMAttributeParser &Attributes,
-                             const InputFile *F) {
-  if (!Attributes.hasAttribute(ARMBuildAttrs::ABI_VFP_args))
-    // If an ABI tag isn't present then it is implicitly given the value of 0
-    // which maps to ARMBuildAttrs::BaseAAPCS. However many assembler files,
-    // including some in glibc that don't use FP args (and should have value 3)
-    // don't have the attribute so we do not consider an implicit value of 0
-    // as a clash.
-    return;
-
-  unsigned VFPArgs = Attributes.getAttributeValue(ARMBuildAttrs::ABI_VFP_args);
-  ARMVFPArgKind Arg;
-  switch (VFPArgs) {
-  case ARMBuildAttrs::BaseAAPCS:
-    Arg = ARMVFPArgKind::Base;
-    break;
-  case ARMBuildAttrs::HardFPAAPCS:
-    Arg = ARMVFPArgKind::VFP;
-    break;
-  case ARMBuildAttrs::ToolChainFPPCS:
-    // Tool chain specific convention that conforms to neither AAPCS variant.
-    Arg = ARMVFPArgKind::ToolChain;
-    break;
-  case ARMBuildAttrs::CompatibleFPAAPCS:
-    // Object compatible with all conventions.
-    return;
-  default:
-    error(toString(F) + ": unknown Tag_ABI_VFP_args value: " + Twine(VFPArgs));
-    return;
-  }
-  // Follow ld.bfd and error if there is a mix of calling conventions.
-  if (Config->ARMVFPArgs != Arg && Config->ARMVFPArgs != ARMVFPArgKind::Default)
-    error(toString(F) + ": incompatible Tag_ABI_VFP_args");
-  else
-    Config->ARMVFPArgs = Arg;
-}
-
-// The ARM support in lld makes some use of instructions that are not available
-// on all ARM architectures. Namely:
-// - Use of BLX instruction for interworking between ARM and Thumb state.
-// - Use of the extended Thumb branch encoding in relocation.
-// - Use of the MOVT/MOVW instructions in Thumb Thunks.
-// The ARM Attributes section contains information about the architecture chosen
-// at compile time. We follow the convention that if at least one input object
-// is compiled with an architecture that supports these features then lld is
-// permitted to use them.
-static void updateSupportedARMFeatures(const ARMAttributeParser &Attributes) {
-  if (!Attributes.hasAttribute(ARMBuildAttrs::CPU_arch))
-    return;
-  auto Arch = Attributes.getAttributeValue(ARMBuildAttrs::CPU_arch);
-  switch (Arch) {
-  case ARMBuildAttrs::Pre_v4:
-  case ARMBuildAttrs::v4:
-  case ARMBuildAttrs::v4T:
-    // Architectures prior to v5 do not support BLX instruction
-    break;
-  case ARMBuildAttrs::v5T:
-  case ARMBuildAttrs::v5TE:
-  case ARMBuildAttrs::v5TEJ:
-  case ARMBuildAttrs::v6:
-  case ARMBuildAttrs::v6KZ:
-  case ARMBuildAttrs::v6K:
-    Config->ARMHasBlx = true;
-    // Architectures used in pre-Cortex processors do not support
-    // The J1 = 1 J2 = 1 Thumb branch range extension, with the exception
-    // of Architecture v6T2 (arm1156t2-s and arm1156t2f-s) that do.
-    break;
-  default:
-    // All other Architectures have BLX and extended branch encoding
-    Config->ARMHasBlx = true;
-    Config->ARMJ1J2BranchEncoding = true;
-    if (Arch != ARMBuildAttrs::v6_M && Arch != ARMBuildAttrs::v6S_M)
-      // All Architectures used in Cortex processors with the exception
-      // of v6-M and v6S-M have the MOVT and MOVW instructions.
-      Config->ARMHasMovtMovw = true;
-    break;
-  }
-}
-
-template <class ELFT>
-InputSectionBase *ObjFile<ELFT>::getRelocTarget(const Elf_Shdr &Sec) {
-  uint32_t Idx = Sec.sh_info;
-  if (Idx >= this->Sections.size())
-    fatal(toString(this) + ": invalid relocated section index: " + Twine(Idx));
-  InputSectionBase *Target = this->Sections[Idx];
-
-  // Strictly speaking, a relocation section must be included in the
-  // group of the section it relocates. However, LLVM 3.3 and earlier
-  // would fail to do so, so we gracefully handle that case.
-  if (Target == &InputSection::Discarded)
-    return nullptr;
-
-  if (!Target)
-    fatal(toString(this) + ": unsupported relocation reference");
-  return Target;
-}
-
-// Create a regular InputSection class that has the same contents
-// as a given section.
-static InputSection *toRegularSection(MergeInputSection *Sec) {
-  return make<InputSection>(Sec->File, Sec->Flags, Sec->Type, Sec->Alignment,
-                            Sec->data(), Sec->Name);
-}
-
-template <class ELFT>
-InputSectionBase *ObjFile<ELFT>::createInputSection(const Elf_Shdr &Sec) {
-  StringRef Name = getSectionName(Sec);
-
-  switch (Sec.sh_type) {
-  case SHT_ARM_ATTRIBUTES: {
-    if (Config->EMachine != EM_ARM)
-      break;
-    ARMAttributeParser Attributes;
-    ArrayRef<uint8_t> Contents = check(this->getObj().getSectionContents(&Sec));
-    Attributes.Parse(Contents, /*isLittle*/ Config->EKind == ELF32LEKind);
-    updateSupportedARMFeatures(Attributes);
-    updateARMVFPArgs(Attributes, this);
-
-    // FIXME: Retain the first attribute section we see. The eglibc ARM
-    // dynamic loaders require the presence of an attribute section for dlopen
-    // to work. In a full implementation we would merge all attribute sections.
-    if (In.ARMAttributes == nullptr) {
-      In.ARMAttributes = make<InputSection>(*this, Sec, Name);
-      return In.ARMAttributes;
-    }
-    return &InputSection::Discarded;
-  }
-  case SHT_RELA:
-  case SHT_REL: {
-    // Find a relocation target section and associate this section with that.
-    // Target may have been discarded if it is in a different section group
-    // and the group is discarded, even though it's a violation of the
-    // spec. We handle that situation gracefully by discarding dangling
-    // relocation sections.
-    InputSectionBase *Target = getRelocTarget(Sec);
-    if (!Target)
-      return nullptr;
-
-    // This section contains relocation information.
-    // If -r is given, we do not interpret or apply relocation
-    // but just copy relocation sections to output.
-    if (Config->Relocatable) {
-      InputSection *RelocSec = make<InputSection>(*this, Sec, Name);
-      // We want to add a dependency to target, similar like we do for
-      // -emit-relocs below. This is useful for the case when linker script
-      // contains the "/DISCARD/". It is perhaps uncommon to use a script with
-      // -r, but we faced it in the Linux kernel and have to handle such case
-      // and not to crash.
-      Target->DependentSections.push_back(RelocSec);
-      return RelocSec;
-    }
-
-    if (Target->FirstRelocation)
-      fatal(toString(this) +
-            ": multiple relocation sections to one section are not supported");
-
-    // ELF spec allows mergeable sections with relocations, but they are
-    // rare, and it is in practice hard to merge such sections by contents,
-    // because applying relocations at end of linking changes section
-    // contents. So, we simply handle such sections as non-mergeable ones.
-    // Degrading like this is acceptable because section merging is optional.
-    if (auto *MS = dyn_cast<MergeInputSection>(Target)) {
-      Target = toRegularSection(MS);
-      this->Sections[Sec.sh_info] = Target;
-    }
-
-    if (Sec.sh_type == SHT_RELA) {
-      ArrayRef<Elf_Rela> Rels = CHECK(this->getObj().relas(&Sec), this);
-      Target->FirstRelocation = Rels.begin();
-      Target->NumRelocations = Rels.size();
-      Target->AreRelocsRela = true;
-    } else {
-      ArrayRef<Elf_Rel> Rels = CHECK(this->getObj().rels(&Sec), this);
-      Target->FirstRelocation = Rels.begin();
-      Target->NumRelocations = Rels.size();
-      Target->AreRelocsRela = false;
-    }
-    assert(isUInt<31>(Target->NumRelocations));
-
-    // Relocation sections processed by the linker are usually removed
-    // from the output, so returning `nullptr` for the normal case.
-    // However, if -emit-relocs is given, we need to leave them in the output.
-    // (Some post link analysis tools need this information.)
-    if (Config->EmitRelocs) {
-      InputSection *RelocSec = make<InputSection>(*this, Sec, Name);
-      // We will not emit relocation section if target was discarded.
-      Target->DependentSections.push_back(RelocSec);
-      return RelocSec;
-    }
-    return nullptr;
-  }
-  }
-
-  // The GNU linker uses .note.GNU-stack section as a marker indicating
-  // that the code in the object file does not expect that the stack is
-  // executable (in terms of NX bit). If all input files have the marker,
-  // the GNU linker adds a PT_GNU_STACK segment to tells the loader to
-  // make the stack non-executable. Most object files have this section as
-  // of 2017.
-  //
-  // But making the stack non-executable is a norm today for security
-  // reasons. Failure to do so may result in a serious security issue.
-  // Therefore, we make LLD always add PT_GNU_STACK unless it is
-  // explicitly told to do otherwise (by -z execstack). Because the stack
-  // executable-ness is controlled solely by command line options,
-  // .note.GNU-stack sections are simply ignored.
-  if (Name == ".note.GNU-stack")
-    return &InputSection::Discarded;
-
-  // Split stacks is a feature to support a discontiguous stack,
-  // commonly used in the programming language Go. For the details,
-  // see https://gcc.gnu.org/wiki/SplitStacks. An object file compiled
-  // for split stack will include a .note.GNU-split-stack section.
-  if (Name == ".note.GNU-split-stack") {
-    if (Config->Relocatable) {
-      error("cannot mix split-stack and non-split-stack in a relocatable link");
-      return &InputSection::Discarded;
-    }
-    this->SplitStack = true;
-    return &InputSection::Discarded;
-  }
-
-  // An object file cmpiled for split stack, but where some of the
-  // functions were compiled with the no_split_stack_attribute will
-  // include a .note.GNU-no-split-stack section.
-  if (Name == ".note.GNU-no-split-stack") {
-    this->SomeNoSplitStack = true;
-    return &InputSection::Discarded;
-  }
-
-  // The linkonce feature is a sort of proto-comdat. Some glibc i386 object
-  // files contain definitions of symbol "__x86.get_pc_thunk.bx" in linkonce
-  // sections. Drop those sections to avoid duplicate symbol errors.
-  // FIXME: This is glibc PR20543, we should remove this hack once that has been
-  // fixed for a while.
-  if (Name == ".gnu.linkonce.t.__x86.get_pc_thunk.bx" ||
-      Name == ".gnu.linkonce.t.__i686.get_pc_thunk.bx")
-    return &InputSection::Discarded;
-
-  // If we are creating a new .build-id section, strip existing .build-id
-  // sections so that the output won't have more than one .build-id.
-  // This is not usually a problem because input object files normally don't
-  // have .build-id sections, but you can create such files by
-  // "ld.{bfd,gold,lld} -r --build-id", and we want to guard against it.
-  if (Name == ".note.gnu.build-id" && Config->BuildId != BuildIdKind::None)
-    return &InputSection::Discarded;
-
-  // The linker merges EH (exception handling) frames and creates a
-  // .eh_frame_hdr section for runtime. So we handle them with a special
-  // class. For relocatable outputs, they are just passed through.
-  if (Name == ".eh_frame" && !Config->Relocatable)
-    return make<EhInputSection>(*this, Sec, Name);
-
-  if (shouldMerge(Sec))
-    return make<MergeInputSection>(*this, Sec, Name);
-  return make<InputSection>(*this, Sec, Name);
-}
-
-template <class ELFT>
-StringRef ObjFile<ELFT>::getSectionName(const Elf_Shdr &Sec) {
-  return CHECK(this->getObj().getSectionName(&Sec, SectionStringTable), this);
-}
-
-template <class ELFT> void ObjFile<ELFT>::initializeSymbols() {
-  this->Symbols.reserve(this->ELFSyms.size());
-  for (const Elf_Sym &Sym : this->ELFSyms)
-    this->Symbols.push_back(createSymbol(&Sym));
-}
-
-template <class ELFT> Symbol *ObjFile<ELFT>::createSymbol(const Elf_Sym *Sym) {
-  int Binding = Sym->getBinding();
-
-  uint32_t SecIdx = this->getSectionIndex(*Sym);
-  if (SecIdx >= this->Sections.size())
-    fatal(toString(this) + ": invalid section index: " + Twine(SecIdx));
-
-  InputSectionBase *Sec = this->Sections[SecIdx];
-  uint8_t StOther = Sym->st_other;
-  uint8_t Type = Sym->getType();
-  uint64_t Value = Sym->st_value;
-  uint64_t Size = Sym->st_size;
-
-  if (Binding == STB_LOCAL) {
-    if (Sym->getType() == STT_FILE)
-      SourceFile = CHECK(Sym->getName(this->StringTable), this);
-
-    if (this->StringTable.size() <= Sym->st_name)
-      fatal(toString(this) + ": invalid symbol name offset");
-
-    StringRefZ Name = this->StringTable.data() + Sym->st_name;
-    if (Sym->st_shndx == SHN_UNDEF)
-      return make<Undefined>(this, Name, Binding, StOther, Type);
-
-    return make<Defined>(this, Name, Binding, StOther, Type, Value, Size, Sec);
-  }
-
-  StringRef Name = CHECK(Sym->getName(this->StringTable), this);
-
-  switch (Sym->st_shndx) {
-  case SHN_UNDEF:
-    return Symtab->addUndefined<ELFT>(Name, Binding, StOther, Type,
-                                      /*CanOmitFromDynSym=*/false, this);
-  case SHN_COMMON:
-    if (Value == 0 || Value >= UINT32_MAX)
-      fatal(toString(this) + ": common symbol '" + Name +
-            "' has invalid alignment: " + Twine(Value));
-    return Symtab->addCommon(Name, Size, Value, Binding, StOther, Type, *this);
-  }
-
-  switch (Binding) {
-  default:
-    fatal(toString(this) + ": unexpected binding: " + Twine(Binding));
-  case STB_GLOBAL:
-  case STB_WEAK:
-  case STB_GNU_UNIQUE:
-    if (Sec == &InputSection::Discarded)
-      return Symtab->addUndefined<ELFT>(Name, Binding, StOther, Type,
-                                        /*CanOmitFromDynSym=*/false, this);
-    return Symtab->addDefined(Name, StOther, Type, Value, Size, Binding, Sec,
-                              this);
-  }
-}
-
-ArchiveFile::ArchiveFile(std::unique_ptr<Archive> &&File)
-    : InputFile(ArchiveKind, File->getMemoryBufferRef()),
-      File(std::move(File)) {}
-
-template <class ELFT> void ArchiveFile::parse() {
-  for (const Archive::Symbol &Sym : File->symbols())
-    Symtab->addLazyArchive<ELFT>(Sym.getName(), *this, Sym);
-}
-
-// Returns a buffer pointing to a member file containing a given symbol.
-InputFile *ArchiveFile::fetch(const Archive::Symbol &Sym) {
-  Archive::Child C =
-      CHECK(Sym.getMember(), toString(this) +
-                                 ": could not get the member for symbol " +
-                                 Sym.getName());
-
-  if (!Seen.insert(C.getChildOffset()).second)
-    return nullptr;
-
-  MemoryBufferRef MB =
-      CHECK(C.getMemoryBufferRef(),
-            toString(this) +
-                ": could not get the buffer for the member defining symbol " +
-                Sym.getName());
-
-  if (Tar && C.getParent()->isThin())
-    Tar->append(relativeToRoot(CHECK(C.getFullName(), this)), MB.getBuffer());
-
-  InputFile *File = createObjectFile(
-      MB, getName(), C.getParent()->isThin() ? 0 : C.getChildOffset());
-  File->GroupId = GroupId;
-  return File;
-}
-
-template <class ELFT>
-SharedFile<ELFT>::SharedFile(MemoryBufferRef M, StringRef DefaultSoName)
-    : ELFFileBase<ELFT>(Base::SharedKind, M), SoName(DefaultSoName),
-      IsNeeded(!Config->AsNeeded) {}
-
-// Partially parse the shared object file so that we can call
-// getSoName on this object.
-template <class ELFT> void SharedFile<ELFT>::parseSoName() {
-  const Elf_Shdr *DynamicSec = nullptr;
-  const ELFFile<ELFT> Obj = this->getObj();
-  ArrayRef<Elf_Shdr> Sections = CHECK(Obj.sections(), this);
-
-  // Search for .dynsym, .dynamic, .symtab, .gnu.version and .gnu.version_d.
-  for (const Elf_Shdr &Sec : Sections) {
-    switch (Sec.sh_type) {
-    default:
-      continue;
-    case SHT_DYNSYM:
-      this->initSymtab(Sections, &Sec);
-      break;
-    case SHT_DYNAMIC:
-      DynamicSec = &Sec;
-      break;
-    case SHT_SYMTAB_SHNDX:
-      this->SymtabSHNDX = CHECK(Obj.getSHNDXTable(Sec, Sections), this);
-      break;
-    case SHT_GNU_versym:
-      this->VersymSec = &Sec;
-      break;
-    case SHT_GNU_verdef:
-      this->VerdefSec = &Sec;
-      break;
-    }
-  }
-
-  if (this->VersymSec && this->ELFSyms.empty())
-    error("SHT_GNU_versym should be associated with symbol table");
-
-  // Search for a DT_SONAME tag to initialize this->SoName.
-  if (!DynamicSec)
-    return;
-  ArrayRef<Elf_Dyn> Arr =
-      CHECK(Obj.template getSectionContentsAsArray<Elf_Dyn>(DynamicSec), this);
-  for (const Elf_Dyn &Dyn : Arr) {
-    if (Dyn.d_tag == DT_SONAME) {
-      uint64_t Val = Dyn.getVal();
-      if (Val >= this->StringTable.size())
-        fatal(toString(this) + ": invalid DT_SONAME entry");
-      SoName = this->StringTable.data() + Val;
-      return;
-    }
-  }
-}
-
-// Parses ".gnu.version" section which is a parallel array for the symbol table.
-// If a given file doesn't have ".gnu.version" section, returns VER_NDX_GLOBAL.
-template <class ELFT> std::vector<uint32_t> SharedFile<ELFT>::parseVersyms() {
-  size_t Size = this->ELFSyms.size() - this->FirstGlobal;
-  if (!VersymSec)
-    return std::vector<uint32_t>(Size, VER_NDX_GLOBAL);
-
-  const char *Base = this->MB.getBuffer().data();
-  const Elf_Versym *Versym =
-      reinterpret_cast<const Elf_Versym *>(Base + VersymSec->sh_offset) +
-      this->FirstGlobal;
-
-  std::vector<uint32_t> Ret(Size);
-  for (size_t I = 0; I < Size; ++I)
-    Ret[I] = Versym[I].vs_index;
-  return Ret;
-}
-
-// Parse the version definitions in the object file if present. Returns a vector
-// whose nth element contains a pointer to the Elf_Verdef for version identifier
-// n. Version identifiers that are not definitions map to nullptr.
-template <class ELFT>
-std::vector<const typename ELFT::Verdef *> SharedFile<ELFT>::parseVerdefs() {
-  if (!VerdefSec)
-    return {};
-
-  // We cannot determine the largest verdef identifier without inspecting
-  // every Elf_Verdef, but both bfd and gold assign verdef identifiers
-  // sequentially starting from 1, so we predict that the largest identifier
-  // will be VerdefCount.
-  unsigned VerdefCount = VerdefSec->sh_info;
-  std::vector<const Elf_Verdef *> Verdefs(VerdefCount + 1);
-
-  // Build the Verdefs array by following the chain of Elf_Verdef objects
-  // from the start of the .gnu.version_d section.
-  const char *Base = this->MB.getBuffer().data();
-  const char *Verdef = Base + VerdefSec->sh_offset;
-  for (unsigned I = 0; I != VerdefCount; ++I) {
-    auto *CurVerdef = reinterpret_cast<const Elf_Verdef *>(Verdef);
-    Verdef += CurVerdef->vd_next;
-    unsigned VerdefIndex = CurVerdef->vd_ndx;
-    Verdefs.resize(VerdefIndex + 1);
-    Verdefs[VerdefIndex] = CurVerdef;
-  }
-
-  return Verdefs;
-}
-
-// We do not usually care about alignments of data in shared object
-// files because the loader takes care of it. However, if we promote a
-// DSO symbol to point to .bss due to copy relocation, we need to keep
-// the original alignment requirements. We infer it in this function.
-template <class ELFT>
-uint32_t SharedFile<ELFT>::getAlignment(ArrayRef<Elf_Shdr> Sections,
-                                        const Elf_Sym &Sym) {
-  uint64_t Ret = UINT64_MAX;
-  if (Sym.st_value)
-    Ret = 1ULL << countTrailingZeros((uint64_t)Sym.st_value);
-  if (0 < Sym.st_shndx && Sym.st_shndx < Sections.size())
-    Ret = std::min<uint64_t>(Ret, Sections[Sym.st_shndx].sh_addralign);
-  return (Ret > UINT32_MAX) ? 0 : Ret;
-}
-
-// Fully parse the shared object file. This must be called after parseSoName().
-//
-// This function parses symbol versions. If a DSO has version information,
-// the file has a ".gnu.version_d" section which contains symbol version
-// definitions. Each symbol is associated to one version through a table in
-// ".gnu.version" section. That table is a parallel array for the symbol
-// table, and each table entry contains an index in ".gnu.version_d".
-//
-// The special index 0 is reserved for VERF_NDX_LOCAL and 1 is for
-// VER_NDX_GLOBAL. There's no table entry for these special versions in
-// ".gnu.version_d".
-//
-// The file format for symbol versioning is perhaps a bit more complicated
-// than necessary, but you can easily understand the code if you wrap your
-// head around the data structure described above.
-template <class ELFT> void SharedFile<ELFT>::parseRest() {
-  Verdefs = parseVerdefs();                       // parse .gnu.version_d
-  std::vector<uint32_t> Versyms = parseVersyms(); // parse .gnu.version
-  ArrayRef<Elf_Shdr> Sections = CHECK(this->getObj().sections(), this);
-
-  // System libraries can have a lot of symbols with versions. Using a
-  // fixed buffer for computing the versions name (foo@ver) can save a
-  // lot of allocations.
-  SmallString<0> VersionedNameBuffer;
-
-  // Add symbols to the symbol table.
-  ArrayRef<Elf_Sym> Syms = this->getGlobalELFSyms();
-  for (size_t I = 0; I < Syms.size(); ++I) {
-    const Elf_Sym &Sym = Syms[I];
-
-    // ELF spec requires that all local symbols precede weak or global
-    // symbols in each symbol table, and the index of first non-local symbol
-    // is stored to sh_info. If a local symbol appears after some non-local
-    // symbol, that's a violation of the spec.
-    StringRef Name = CHECK(Sym.getName(this->StringTable), this);
-    if (Sym.getBinding() == STB_LOCAL) {
-      warn("found local symbol '" + Name +
-           "' in global part of symbol table in file " + toString(this));
-      continue;
-    }
-
-    if (Sym.isUndefined()) {
-      Symbol *S = Symtab->addUndefined<ELFT>(Name, Sym.getBinding(),
-                                             Sym.st_other, Sym.getType(),
-                                             /*CanOmitFromDynSym=*/false, this);
-      S->ExportDynamic = true;
-      continue;
-    }
-
-    // MIPS BFD linker puts _gp_disp symbol into DSO files and incorrectly
-    // assigns VER_NDX_LOCAL to this section global symbol. Here is a
-    // workaround for this bug.
-    uint32_t Idx = Versyms[I] & ~VERSYM_HIDDEN;
-    if (Config->EMachine == EM_MIPS && Idx == VER_NDX_LOCAL &&
-        Name == "_gp_disp")
-      continue;
-
-    uint64_t Alignment = getAlignment(Sections, Sym);
-    if (!(Versyms[I] & VERSYM_HIDDEN))
-      Symtab->addShared(Name, *this, Sym, Alignment, Idx);
-
-    // Also add the symbol with the versioned name to handle undefined symbols
-    // with explicit versions.
-    if (Idx == VER_NDX_GLOBAL)
-      continue;
-
-    if (Idx >= Verdefs.size() || Idx == VER_NDX_LOCAL) {
-      error("corrupt input file: version definition index " + Twine(Idx) +
-            " for symbol " + Name + " is out of bounds\n>>> defined in " +
-            toString(this));
-      continue;
-    }
-
-    StringRef VerName =
-        this->StringTable.data() + Verdefs[Idx]->getAux()->vda_name;
-    VersionedNameBuffer.clear();
-    Name = (Name + "@" + VerName).toStringRef(VersionedNameBuffer);
-    Symtab->addShared(Saver.save(Name), *this, Sym, Alignment, Idx);
-  }
-}
-
-static ELFKind getBitcodeELFKind(const Triple &T) {
-  if (T.isLittleEndian())
-    return T.isArch64Bit() ? ELF64LEKind : ELF32LEKind;
-  return T.isArch64Bit() ? ELF64BEKind : ELF32BEKind;
-}
-
-static uint8_t getBitcodeMachineKind(StringRef Path, const Triple &T) {
-  switch (T.getArch()) {
-  case Triple::aarch64:
-    return EM_AARCH64;
-  case Triple::amdgcn:
-  case Triple::r600:
-    return EM_AMDGPU;
-  case Triple::arm:
-  case Triple::thumb:
-    return EM_ARM;
-  case Triple::avr:
-    return EM_AVR;
-  case Triple::mips:
-  case Triple::mipsel:
-  case Triple::mips64:
-  case Triple::mips64el:
-    return EM_MIPS;
-  case Triple::msp430:
-    return EM_MSP430;
-  case Triple::ppc:
-    return EM_PPC;
-  case Triple::ppc64:
-  case Triple::ppc64le:
-    return EM_PPC64;
-  case Triple::x86:
-    return T.isOSIAMCU() ? EM_IAMCU : EM_386;
-  case Triple::x86_64:
-    return EM_X86_64;
-  default:
-    error(Path + ": could not infer e_machine from bitcode target triple " +
-          T.str());
-    return EM_NONE;
-  }
-}
-
-BitcodeFile::BitcodeFile(MemoryBufferRef MB, StringRef ArchiveName,
-                         uint64_t OffsetInArchive)
-    : InputFile(BitcodeKind, MB) {
-  this->ArchiveName = ArchiveName;
-
-  std::string Path = MB.getBufferIdentifier().str();
-  if (Config->ThinLTOIndexOnly)
-    Path = replaceThinLTOSuffix(MB.getBufferIdentifier());
-
-  // ThinLTO assumes that all MemoryBufferRefs given to it have a unique
-  // name. If two archives define two members with the same name, this
-  // causes a collision which result in only one of the objects being taken
-  // into consideration at LTO time (which very likely causes undefined
-  // symbols later in the link stage). So we append file offset to make
-  // filename unique.
-  MemoryBufferRef MBRef(
-      MB.getBuffer(),
-      Saver.save(ArchiveName + Path +
-                 (ArchiveName.empty() ? "" : utostr(OffsetInArchive))));
-
-  Obj = CHECK(lto::InputFile::create(MBRef), this);
-
-  Triple T(Obj->getTargetTriple());
-  EKind = getBitcodeELFKind(T);
-  EMachine = getBitcodeMachineKind(MB.getBufferIdentifier(), T);
-}
-
-static uint8_t mapVisibility(GlobalValue::VisibilityTypes GvVisibility) {
-  switch (GvVisibility) {
-  case GlobalValue::DefaultVisibility:
-    return STV_DEFAULT;
-  case GlobalValue::HiddenVisibility:
-    return STV_HIDDEN;
-  case GlobalValue::ProtectedVisibility:
-    return STV_PROTECTED;
-  }
-  llvm_unreachable("unknown visibility");
-}
-
-template <class ELFT>
-static Symbol *createBitcodeSymbol(const std::vector<bool> &KeptComdats,
-                                   const lto::InputFile::Symbol &ObjSym,
-                                   BitcodeFile &F) {
-  StringRef Name = Saver.save(ObjSym.getName());
-  uint32_t Binding = ObjSym.isWeak() ? STB_WEAK : STB_GLOBAL;
-
-  uint8_t Type = ObjSym.isTLS() ? STT_TLS : STT_NOTYPE;
-  uint8_t Visibility = mapVisibility(ObjSym.getVisibility());
-  bool CanOmitFromDynSym = ObjSym.canBeOmittedFromSymbolTable();
-
-  int C = ObjSym.getComdatIndex();
-  if (C != -1 && !KeptComdats[C])
-    return Symtab->addUndefined<ELFT>(Name, Binding, Visibility, Type,
-                                      CanOmitFromDynSym, &F);
-
-  if (ObjSym.isUndefined())
-    return Symtab->addUndefined<ELFT>(Name, Binding, Visibility, Type,
-                                      CanOmitFromDynSym, &F);
-
-  if (ObjSym.isCommon())
-    return Symtab->addCommon(Name, ObjSym.getCommonSize(),
-                             ObjSym.getCommonAlignment(), Binding, Visibility,
-                             STT_OBJECT, F);
-
-  return Symtab->addBitcode(Name, Binding, Visibility, Type, CanOmitFromDynSym,
-                            F);
-}
-
-template <class ELFT>
-void BitcodeFile::parse(DenseSet<CachedHashStringRef> &ComdatGroups) {
-  std::vector<bool> KeptComdats;
-  for (StringRef S : Obj->getComdatTable())
-    KeptComdats.push_back(ComdatGroups.insert(CachedHashStringRef(S)).second);
-
-  for (const lto::InputFile::Symbol &ObjSym : Obj->symbols())
-    Symbols.push_back(createBitcodeSymbol<ELFT>(KeptComdats, ObjSym, *this));
-}
-
-static ELFKind getELFKind(MemoryBufferRef MB) {
-  unsigned char Size;
-  unsigned char Endian;
-  std::tie(Size, Endian) = getElfArchType(MB.getBuffer());
-
-  if (Endian != ELFDATA2LSB && Endian != ELFDATA2MSB)
-    fatal(MB.getBufferIdentifier() + ": invalid data encoding");
-  if (Size != ELFCLASS32 && Size != ELFCLASS64)
-    fatal(MB.getBufferIdentifier() + ": invalid file class");
-
-  size_t BufSize = MB.getBuffer().size();
-  if ((Size == ELFCLASS32 && BufSize < sizeof(Elf32_Ehdr)) ||
-      (Size == ELFCLASS64 && BufSize < sizeof(Elf64_Ehdr)))
-    fatal(MB.getBufferIdentifier() + ": file is too short");
-
-  if (Size == ELFCLASS32)
-    return (Endian == ELFDATA2LSB) ? ELF32LEKind : ELF32BEKind;
-  return (Endian == ELFDATA2LSB) ? ELF64LEKind : ELF64BEKind;
-}
-
-void BinaryFile::parse() {
-  ArrayRef<uint8_t> Data = arrayRefFromStringRef(MB.getBuffer());
-  auto *Section = make<InputSection>(this, SHF_ALLOC | SHF_WRITE, SHT_PROGBITS,
-                                     8, Data, ".data");
-  Sections.push_back(Section);
-
-  // For each input file foo that is embedded to a result as a binary
-  // blob, we define _binary_foo_{start,end,size} symbols, so that
-  // user programs can access blobs by name. Non-alphanumeric
-  // characters in a filename are replaced with underscore.
-  std::string S = "_binary_" + MB.getBufferIdentifier().str();
-  for (size_t I = 0; I < S.size(); ++I)
-    if (!isAlnum(S[I]))
-      S[I] = '_';
-
-  Symtab->addDefined(Saver.save(S + "_start"), STV_DEFAULT, STT_OBJECT, 0, 0,
-                     STB_GLOBAL, Section, nullptr);
-  Symtab->addDefined(Saver.save(S + "_end"), STV_DEFAULT, STT_OBJECT,
-                     Data.size(), 0, STB_GLOBAL, Section, nullptr);
-  Symtab->addDefined(Saver.save(S + "_size"), STV_DEFAULT, STT_OBJECT,
-                     Data.size(), 0, STB_GLOBAL, nullptr, nullptr);
-}
-
-InputFile *elf::createObjectFile(MemoryBufferRef MB, StringRef ArchiveName,
-                                 uint64_t OffsetInArchive) {
-  if (isBitcode(MB))
-    return make<BitcodeFile>(MB, ArchiveName, OffsetInArchive);
-
-  switch (getELFKind(MB)) {
-  case ELF32LEKind:
-    return make<ObjFile<ELF32LE>>(MB, ArchiveName);
-  case ELF32BEKind:
-    return make<ObjFile<ELF32BE>>(MB, ArchiveName);
-  case ELF64LEKind:
-    return make<ObjFile<ELF64LE>>(MB, ArchiveName);
-  case ELF64BEKind:
-    return make<ObjFile<ELF64BE>>(MB, ArchiveName);
-  default:
-    llvm_unreachable("getELFKind");
-  }
-}
-
-InputFile *elf::createSharedFile(MemoryBufferRef MB, StringRef DefaultSoName) {
-  switch (getELFKind(MB)) {
-  case ELF32LEKind:
-    return make<SharedFile<ELF32LE>>(MB, DefaultSoName);
-  case ELF32BEKind:
-    return make<SharedFile<ELF32BE>>(MB, DefaultSoName);
-  case ELF64LEKind:
-    return make<SharedFile<ELF64LE>>(MB, DefaultSoName);
-  case ELF64BEKind:
-    return make<SharedFile<ELF64BE>>(MB, DefaultSoName);
-  default:
-    llvm_unreachable("getELFKind");
-  }
-}
-
-MemoryBufferRef LazyObjFile::getBuffer() {
-  if (AddedToLink)
-    return MemoryBufferRef();
-  AddedToLink = true;
-  return MB;
-}
-
-InputFile *LazyObjFile::fetch() {
-  MemoryBufferRef MBRef = getBuffer();
-  if (MBRef.getBuffer().empty())
-    return nullptr;
-
-  InputFile *File = createObjectFile(MBRef, ArchiveName, OffsetInArchive);
-  File->GroupId = GroupId;
-  return File;
-}
-
-template <class ELFT> void LazyObjFile::parse() {
-  // A lazy object file wraps either a bitcode file or an ELF file.
-  if (isBitcode(this->MB)) {
-    std::unique_ptr<lto::InputFile> Obj =
-        CHECK(lto::InputFile::create(this->MB), this);
-    for (const lto::InputFile::Symbol &Sym : Obj->symbols())
-      if (!Sym.isUndefined())
-        Symtab->addLazyObject<ELFT>(Saver.save(Sym.getName()), *this);
-    return;
-  }
-
-  if (getELFKind(this->MB) != Config->EKind) {
-    error("incompatible file: " + this->MB.getBufferIdentifier());
-    return;
-  }
-
-  ELFFile<ELFT> Obj = check(ELFFile<ELFT>::create(MB.getBuffer()));
-  ArrayRef<typename ELFT::Shdr> Sections = CHECK(Obj.sections(), this);
-
-  for (const typename ELFT::Shdr &Sec : Sections) {
-    if (Sec.sh_type != SHT_SYMTAB)
-      continue;
-
-    typename ELFT::SymRange Syms = CHECK(Obj.symbols(&Sec), this);
-    uint32_t FirstGlobal = Sec.sh_info;
-    StringRef StringTable =
-        CHECK(Obj.getStringTableForSymtab(Sec, Sections), this);
-
-    for (const typename ELFT::Sym &Sym : Syms.slice(FirstGlobal))
-      if (Sym.st_shndx != SHN_UNDEF)
-        Symtab->addLazyObject<ELFT>(CHECK(Sym.getName(StringTable), this),
-                                    *this);
-    return;
-  }
-}
-
-std::string elf::replaceThinLTOSuffix(StringRef Path) {
-  StringRef Suffix = Config->ThinLTOObjectSuffixReplace.first;
-  StringRef Repl = Config->ThinLTOObjectSuffixReplace.second;
-
-  if (Path.consume_back(Suffix))
-    return (Path + Repl).str();
-  return Path;
-}
-
-template void ArchiveFile::parse<ELF32LE>();
-template void ArchiveFile::parse<ELF32BE>();
-template void ArchiveFile::parse<ELF64LE>();
-template void ArchiveFile::parse<ELF64BE>();
-
-template void BitcodeFile::parse<ELF32LE>(DenseSet<CachedHashStringRef> &);
-template void BitcodeFile::parse<ELF32BE>(DenseSet<CachedHashStringRef> &);
-template void BitcodeFile::parse<ELF64LE>(DenseSet<CachedHashStringRef> &);
-template void BitcodeFile::parse<ELF64BE>(DenseSet<CachedHashStringRef> &);
-
-template void LazyObjFile::parse<ELF32LE>();
-template void LazyObjFile::parse<ELF32BE>();
-template void LazyObjFile::parse<ELF64LE>();
-template void LazyObjFile::parse<ELF64BE>();
-
-template class elf::ELFFileBase<ELF32LE>;
-template class elf::ELFFileBase<ELF32BE>;
-template class elf::ELFFileBase<ELF64LE>;
-template class elf::ELFFileBase<ELF64BE>;
-
-template class elf::ObjFile<ELF32LE>;
-template class elf::ObjFile<ELF32BE>;
-template class elf::ObjFile<ELF64LE>;
-template class elf::ObjFile<ELF64BE>;
-
-template class elf::SharedFile<ELF32LE>;
-template class elf::SharedFile<ELF32BE>;
-template class elf::SharedFile<ELF64LE>;
-template class elf::SharedFile<ELF64BE>;