Remove LLVM 8.0.1 files.

1 files changed, 0 insertions, 943 deletions

diff --git a/gnu/llvm/tools/clang/lib/Serialization/GlobalModuleIndex.cpp b/gnu/llvm/tools/clang/lib/Serialization/GlobalModuleIndex.cpp
deleted file mode 100644
index e7642a38924..00000000000
--- a/gnu/llvm/tools/clang/lib/Serialization/GlobalModuleIndex.cpp
+++ /dev/null
@@ -1,943 +0,0 @@
-//===--- GlobalModuleIndex.cpp - Global Module Index ------------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements the GlobalModuleIndex class.
-//
-//===----------------------------------------------------------------------===//
-
-#include "ASTReaderInternals.h"
-#include "clang/Basic/FileManager.h"
-#include "clang/Lex/HeaderSearch.h"
-#include "clang/Serialization/ASTBitCodes.h"
-#include "clang/Serialization/GlobalModuleIndex.h"
-#include "clang/Serialization/Module.h"
-#include "clang/Serialization/PCHContainerOperations.h"
-#include "llvm/ADT/DenseMap.h"
-#include "llvm/ADT/MapVector.h"
-#include "llvm/ADT/SmallString.h"
-#include "llvm/Bitcode/BitstreamReader.h"
-#include "llvm/Bitcode/BitstreamWriter.h"
-#include "llvm/Support/DJB.h"
-#include "llvm/Support/FileSystem.h"
-#include "llvm/Support/LockFileManager.h"
-#include "llvm/Support/MemoryBuffer.h"
-#include "llvm/Support/OnDiskHashTable.h"
-#include "llvm/Support/Path.h"
-#include <cstdio>
-using namespace clang;
-using namespace serialization;
-
-//----------------------------------------------------------------------------//
-// Shared constants
-//----------------------------------------------------------------------------//
-namespace {
-  enum {
-    /// The block containing the index.
-    GLOBAL_INDEX_BLOCK_ID = llvm::bitc::FIRST_APPLICATION_BLOCKID
-  };
-
-  /// Describes the record types in the index.
-  enum IndexRecordTypes {
-    /// Contains version information and potentially other metadata,
-    /// used to determine if we can read this global index file.
-    INDEX_METADATA,
-    /// Describes a module, including its file name and dependencies.
-    MODULE,
-    /// The index for identifiers.
-    IDENTIFIER_INDEX
-  };
-}
-
-/// The name of the global index file.
-static const char * const IndexFileName = "modules.idx";
-
-/// The global index file version.
-static const unsigned CurrentVersion = 1;
-
-//----------------------------------------------------------------------------//
-// Global module index reader.
-//----------------------------------------------------------------------------//
-
-namespace {
-
-/// Trait used to read the identifier index from the on-disk hash
-/// table.
-class IdentifierIndexReaderTrait {
-public:
-  typedef StringRef external_key_type;
-  typedef StringRef internal_key_type;
-  typedef SmallVector<unsigned, 2> data_type;
-  typedef unsigned hash_value_type;
-  typedef unsigned offset_type;
-
-  static bool EqualKey(const internal_key_type& a, const internal_key_type& b) {
-    return a == b;
-  }
-
-  static hash_value_type ComputeHash(const internal_key_type& a) {
-    return llvm::djbHash(a);
-  }
-
-  static std::pair<unsigned, unsigned>
-  ReadKeyDataLength(const unsigned char*& d) {
-    using namespace llvm::support;
-    unsigned KeyLen = endian::readNext<uint16_t, little, unaligned>(d);
-    unsigned DataLen = endian::readNext<uint16_t, little, unaligned>(d);
-    return std::make_pair(KeyLen, DataLen);
-  }
-
-  static const internal_key_type&
-  GetInternalKey(const external_key_type& x) { return x; }
-
-  static const external_key_type&
-  GetExternalKey(const internal_key_type& x) { return x; }
-
-  static internal_key_type ReadKey(const unsigned char* d, unsigned n) {
-    return StringRef((const char *)d, n);
-  }
-
-  static data_type ReadData(const internal_key_type& k,
-                            const unsigned char* d,
-                            unsigned DataLen) {
-    using namespace llvm::support;
-
-    data_type Result;
-    while (DataLen > 0) {
-      unsigned ID = endian::readNext<uint32_t, little, unaligned>(d);
-      Result.push_back(ID);
-      DataLen -= 4;
-    }
-
-    return Result;
-  }
-};
-
-typedef llvm::OnDiskIterableChainedHashTable<IdentifierIndexReaderTrait>
-    IdentifierIndexTable;
-
-}
-
-GlobalModuleIndex::GlobalModuleIndex(std::unique_ptr<llvm::MemoryBuffer> Buffer,
-                                     llvm::BitstreamCursor Cursor)
-    : Buffer(std::move(Buffer)), IdentifierIndex(), NumIdentifierLookups(),
-      NumIdentifierLookupHits() {
-  // Read the global index.
-  bool InGlobalIndexBlock = false;
-  bool Done = false;
-  while (!Done) {
-    llvm::BitstreamEntry Entry = Cursor.advance();
-
-    switch (Entry.Kind) {
-    case llvm::BitstreamEntry::Error:
-      return;
-
-    case llvm::BitstreamEntry::EndBlock:
-      if (InGlobalIndexBlock) {
-        InGlobalIndexBlock = false;
-        Done = true;
-        continue;
-      }
-      return;
-
-
-    case llvm::BitstreamEntry::Record:
-      // Entries in the global index block are handled below.
-      if (InGlobalIndexBlock)
-        break;
-
-      return;
-
-    case llvm::BitstreamEntry::SubBlock:
-      if (!InGlobalIndexBlock && Entry.ID == GLOBAL_INDEX_BLOCK_ID) {
-        if (Cursor.EnterSubBlock(GLOBAL_INDEX_BLOCK_ID))
-          return;
-
-        InGlobalIndexBlock = true;
-      } else if (Cursor.SkipBlock()) {
-        return;
-      }
-      continue;
-    }
-
-    SmallVector<uint64_t, 64> Record;
-    StringRef Blob;
-    switch ((IndexRecordTypes)Cursor.readRecord(Entry.ID, Record, &Blob)) {
-    case INDEX_METADATA:
-      // Make sure that the version matches.
-      if (Record.size() < 1 || Record[0] != CurrentVersion)
-        return;
-      break;
-
-    case MODULE: {
-      unsigned Idx = 0;
-      unsigned ID = Record[Idx++];
-
-      // Make room for this module's information.
-      if (ID == Modules.size())
-        Modules.push_back(ModuleInfo());
-      else
-        Modules.resize(ID + 1);
-
-      // Size/modification time for this module file at the time the
-      // global index was built.
-      Modules[ID].Size = Record[Idx++];
-      Modules[ID].ModTime = Record[Idx++];
-
-      // File name.
-      unsigned NameLen = Record[Idx++];
-      Modules[ID].FileName.assign(Record.begin() + Idx,
-                                  Record.begin() + Idx + NameLen);
-      Idx += NameLen;
-
-      // Dependencies
-      unsigned NumDeps = Record[Idx++];
-      Modules[ID].Dependencies.insert(Modules[ID].Dependencies.end(),
-                                      Record.begin() + Idx,
-                                      Record.begin() + Idx + NumDeps);
-      Idx += NumDeps;
-
-      // Make sure we're at the end of the record.
-      assert(Idx == Record.size() && "More module info?");
-
-      // Record this module as an unresolved module.
-      // FIXME: this doesn't work correctly for module names containing path
-      // separators.
-      StringRef ModuleName = llvm::sys::path::stem(Modules[ID].FileName);
-      // Remove the -<hash of ModuleMapPath>
-      ModuleName = ModuleName.rsplit('-').first;
-      UnresolvedModules[ModuleName] = ID;
-      break;
-    }
-
-    case IDENTIFIER_INDEX:
-      // Wire up the identifier index.
-      if (Record[0]) {
-        IdentifierIndex = IdentifierIndexTable::Create(
-            (const unsigned char *)Blob.data() + Record[0],
-            (const unsigned char *)Blob.data() + sizeof(uint32_t),
-            (const unsigned char *)Blob.data(), IdentifierIndexReaderTrait());
-      }
-      break;
-    }
-  }
-}
-
-GlobalModuleIndex::~GlobalModuleIndex() {
-  delete static_cast<IdentifierIndexTable *>(IdentifierIndex);
-}
-
-std::pair<GlobalModuleIndex *, GlobalModuleIndex::ErrorCode>
-GlobalModuleIndex::readIndex(StringRef Path) {
-  // Load the index file, if it's there.
-  llvm::SmallString<128> IndexPath;
-  IndexPath += Path;
-  llvm::sys::path::append(IndexPath, IndexFileName);
-
-  llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> BufferOrErr =
-      llvm::MemoryBuffer::getFile(IndexPath.c_str());
-  if (!BufferOrErr)
-    return std::make_pair(nullptr, EC_NotFound);
-  std::unique_ptr<llvm::MemoryBuffer> Buffer = std::move(BufferOrErr.get());
-
-  /// The main bitstream cursor for the main block.
-  llvm::BitstreamCursor Cursor(*Buffer);
-
-  // Sniff for the signature.
-  if (Cursor.Read(8) != 'B' ||
-      Cursor.Read(8) != 'C' ||
-      Cursor.Read(8) != 'G' ||
-      Cursor.Read(8) != 'I') {
-    return std::make_pair(nullptr, EC_IOError);
-  }
-
-  return std::make_pair(new GlobalModuleIndex(std::move(Buffer), Cursor),
-                        EC_None);
-}
-
-void
-GlobalModuleIndex::getKnownModules(SmallVectorImpl<ModuleFile *> &ModuleFiles) {
-  ModuleFiles.clear();
-  for (unsigned I = 0, N = Modules.size(); I != N; ++I) {
-    if (ModuleFile *MF = Modules[I].File)
-      ModuleFiles.push_back(MF);
-  }
-}
-
-void GlobalModuleIndex::getModuleDependencies(
-       ModuleFile *File,
-       SmallVectorImpl<ModuleFile *> &Dependencies) {
-  // Look for information about this module file.
-  llvm::DenseMap<ModuleFile *, unsigned>::iterator Known
-    = ModulesByFile.find(File);
-  if (Known == ModulesByFile.end())
-    return;
-
-  // Record dependencies.
-  Dependencies.clear();
-  ArrayRef<unsigned> StoredDependencies = Modules[Known->second].Dependencies;
-  for (unsigned I = 0, N = StoredDependencies.size(); I != N; ++I) {
-    if (ModuleFile *MF = Modules[I].File)
-      Dependencies.push_back(MF);
-  }
-}
-
-bool GlobalModuleIndex::lookupIdentifier(StringRef Name, HitSet &Hits) {
-  Hits.clear();
-
-  // If there's no identifier index, there is nothing we can do.
-  if (!IdentifierIndex)
-    return false;
-
-  // Look into the identifier index.
-  ++NumIdentifierLookups;
-  IdentifierIndexTable &Table
-    = *static_cast<IdentifierIndexTable *>(IdentifierIndex);
-  IdentifierIndexTable::iterator Known = Table.find(Name);
-  if (Known == Table.end()) {
-    return true;
-  }
-
-  SmallVector<unsigned, 2> ModuleIDs = *Known;
-  for (unsigned I = 0, N = ModuleIDs.size(); I != N; ++I) {
-    if (ModuleFile *MF = Modules[ModuleIDs[I]].File)
-      Hits.insert(MF);
-  }
-
-  ++NumIdentifierLookupHits;
-  return true;
-}
-
-bool GlobalModuleIndex::loadedModuleFile(ModuleFile *File) {
-  // Look for the module in the global module index based on the module name.
-  StringRef Name = File->ModuleName;
-  llvm::StringMap<unsigned>::iterator Known = UnresolvedModules.find(Name);
-  if (Known == UnresolvedModules.end()) {
-    return true;
-  }
-
-  // Rectify this module with the global module index.
-  ModuleInfo &Info = Modules[Known->second];
-
-  //  If the size and modification time match what we expected, record this
-  // module file.
-  bool Failed = true;
-  if (File->File->getSize() == Info.Size &&
-      File->File->getModificationTime() == Info.ModTime) {
-    Info.File = File;
-    ModulesByFile[File] = Known->second;
-
-    Failed = false;
-  }
-
-  // One way or another, we have resolved this module file.
-  UnresolvedModules.erase(Known);
-  return Failed;
-}
-
-void GlobalModuleIndex::printStats() {
-  std::fprintf(stderr, "*** Global Module Index Statistics:\n");
-  if (NumIdentifierLookups) {
-    fprintf(stderr, "  %u / %u identifier lookups succeeded (%f%%)\n",
-            NumIdentifierLookupHits, NumIdentifierLookups,
-            (double)NumIdentifierLookupHits*100.0/NumIdentifierLookups);
-  }
-  std::fprintf(stderr, "\n");
-}
-
-LLVM_DUMP_METHOD void GlobalModuleIndex::dump() {
-  llvm::errs() << "*** Global Module Index Dump:\n";
-  llvm::errs() << "Module files:\n";
-  for (auto &MI : Modules) {
-    llvm::errs() << "** " << MI.FileName << "\n";
-    if (MI.File)
-      MI.File->dump();
-    else
-      llvm::errs() << "\n";
-  }
-  llvm::errs() << "\n";
-}
-
-//----------------------------------------------------------------------------//
-// Global module index writer.
-//----------------------------------------------------------------------------//
-
-namespace {
-  /// Provides information about a specific module file.
-  struct ModuleFileInfo {
-    /// The numberic ID for this module file.
-    unsigned ID;
-
-    /// The set of modules on which this module depends. Each entry is
-    /// a module ID.
-    SmallVector<unsigned, 4> Dependencies;
-    ASTFileSignature Signature;
-  };
-
-  struct ImportedModuleFileInfo {
-    off_t StoredSize;
-    time_t StoredModTime;
-    ASTFileSignature StoredSignature;
-    ImportedModuleFileInfo(off_t Size, time_t ModTime, ASTFileSignature Sig)
-        : StoredSize(Size), StoredModTime(ModTime), StoredSignature(Sig) {}
-  };
-
-  /// Builder that generates the global module index file.
-  class GlobalModuleIndexBuilder {
-    FileManager &FileMgr;
-    const PCHContainerReader &PCHContainerRdr;
-
-    /// Mapping from files to module file information.
-    typedef llvm::MapVector<const FileEntry *, ModuleFileInfo> ModuleFilesMap;
-
-    /// Information about each of the known module files.
-    ModuleFilesMap ModuleFiles;
-
-    /// Mapping from the imported module file to the imported
-    /// information.
-    typedef std::multimap<const FileEntry *, ImportedModuleFileInfo>
-        ImportedModuleFilesMap;
-
-    /// Information about each importing of a module file.
-    ImportedModuleFilesMap ImportedModuleFiles;
-
-    /// Mapping from identifiers to the list of module file IDs that
-    /// consider this identifier to be interesting.
-    typedef llvm::StringMap<SmallVector<unsigned, 2> > InterestingIdentifierMap;
-
-    /// A mapping from all interesting identifiers to the set of module
-    /// files in which those identifiers are considered interesting.
-    InterestingIdentifierMap InterestingIdentifiers;
-
-    /// Write the block-info block for the global module index file.
-    void emitBlockInfoBlock(llvm::BitstreamWriter &Stream);
-
-    /// Retrieve the module file information for the given file.
-    ModuleFileInfo &getModuleFileInfo(const FileEntry *File) {
-      llvm::MapVector<const FileEntry *, ModuleFileInfo>::iterator Known
-        = ModuleFiles.find(File);
-      if (Known != ModuleFiles.end())
-        return Known->second;
-
-      unsigned NewID = ModuleFiles.size();
-      ModuleFileInfo &Info = ModuleFiles[File];
-      Info.ID = NewID;
-      return Info;
-    }
-
-  public:
-    explicit GlobalModuleIndexBuilder(
-        FileManager &FileMgr, const PCHContainerReader &PCHContainerRdr)
-        : FileMgr(FileMgr), PCHContainerRdr(PCHContainerRdr) {}
-
-    /// Load the contents of the given module file into the builder.
-    ///
-    /// \returns true if an error occurred, false otherwise.
-    bool loadModuleFile(const FileEntry *File);
-
-    /// Write the index to the given bitstream.
-    /// \returns true if an error occurred, false otherwise.
-    bool writeIndex(llvm::BitstreamWriter &Stream);
-  };
-}
-
-static void emitBlockID(unsigned ID, const char *Name,
-                        llvm::BitstreamWriter &Stream,
-                        SmallVectorImpl<uint64_t> &Record) {
-  Record.clear();
-  Record.push_back(ID);
-  Stream.EmitRecord(llvm::bitc::BLOCKINFO_CODE_SETBID, Record);
-
-  // Emit the block name if present.
-  if (!Name || Name[0] == 0) return;
-  Record.clear();
-  while (*Name)
-    Record.push_back(*Name++);
-  Stream.EmitRecord(llvm::bitc::BLOCKINFO_CODE_BLOCKNAME, Record);
-}
-
-static void emitRecordID(unsigned ID, const char *Name,
-                         llvm::BitstreamWriter &Stream,
-                         SmallVectorImpl<uint64_t> &Record) {
-  Record.clear();
-  Record.push_back(ID);
-  while (*Name)
-    Record.push_back(*Name++);
-  Stream.EmitRecord(llvm::bitc::BLOCKINFO_CODE_SETRECORDNAME, Record);
-}
-
-void
-GlobalModuleIndexBuilder::emitBlockInfoBlock(llvm::BitstreamWriter &Stream) {
-  SmallVector<uint64_t, 64> Record;
-  Stream.EnterBlockInfoBlock();
-
-#define BLOCK(X) emitBlockID(X ## _ID, #X, Stream, Record)
-#define RECORD(X) emitRecordID(X, #X, Stream, Record)
-  BLOCK(GLOBAL_INDEX_BLOCK);
-  RECORD(INDEX_METADATA);
-  RECORD(MODULE);
-  RECORD(IDENTIFIER_INDEX);
-#undef RECORD
-#undef BLOCK
-
-  Stream.ExitBlock();
-}
-
-namespace {
-  class InterestingASTIdentifierLookupTrait
-    : public serialization::reader::ASTIdentifierLookupTraitBase {
-
-  public:
-    /// The identifier and whether it is "interesting".
-    typedef std::pair<StringRef, bool> data_type;
-
-    data_type ReadData(const internal_key_type& k,
-                       const unsigned char* d,
-                       unsigned DataLen) {
-      // The first bit indicates whether this identifier is interesting.
-      // That's all we care about.
-      using namespace llvm::support;
-      unsigned RawID = endian::readNext<uint32_t, little, unaligned>(d);
-      bool IsInteresting = RawID & 0x01;
-      return std::make_pair(k, IsInteresting);
-    }
-  };
-}
-
-bool GlobalModuleIndexBuilder::loadModuleFile(const FileEntry *File) {
-  // Open the module file.
-
-  auto Buffer = FileMgr.getBufferForFile(File, /*isVolatile=*/true);
-  if (!Buffer) {
-    return true;
-  }
-
-  // Initialize the input stream
-  llvm::BitstreamCursor InStream(PCHContainerRdr.ExtractPCH(**Buffer));
-
-  // Sniff for the signature.
-  if (InStream.Read(8) != 'C' ||
-      InStream.Read(8) != 'P' ||
-      InStream.Read(8) != 'C' ||
-      InStream.Read(8) != 'H') {
-    return true;
-  }
-
-  // Record this module file and assign it a unique ID (if it doesn't have
-  // one already).
-  unsigned ID = getModuleFileInfo(File).ID;
-
-  // Search for the blocks and records we care about.
-  enum { Other, ControlBlock, ASTBlock, DiagnosticOptionsBlock } State = Other;
-  bool Done = false;
-  while (!Done) {
-    llvm::BitstreamEntry Entry = InStream.advance();
-    switch (Entry.Kind) {
-    case llvm::BitstreamEntry::Error:
-      Done = true;
-      continue;
-
-    case llvm::BitstreamEntry::Record:
-      // In the 'other' state, just skip the record. We don't care.
-      if (State == Other) {
-        InStream.skipRecord(Entry.ID);
-        continue;
-      }
-
-      // Handle potentially-interesting records below.
-      break;
-
-    case llvm::BitstreamEntry::SubBlock:
-      if (Entry.ID == CONTROL_BLOCK_ID) {
-        if (InStream.EnterSubBlock(CONTROL_BLOCK_ID))
-          return true;
-
-        // Found the control block.
-        State = ControlBlock;
-        continue;
-      }
-
-      if (Entry.ID == AST_BLOCK_ID) {
-        if (InStream.EnterSubBlock(AST_BLOCK_ID))
-          return true;
-
-        // Found the AST block.
-        State = ASTBlock;
-        continue;
-      }
-
-      if (Entry.ID == UNHASHED_CONTROL_BLOCK_ID) {
-        if (InStream.EnterSubBlock(UNHASHED_CONTROL_BLOCK_ID))
-          return true;
-
-        // Found the Diagnostic Options block.
-        State = DiagnosticOptionsBlock;
-        continue;
-      }
-
-      if (InStream.SkipBlock())
-        return true;
-
-      continue;
-
-    case llvm::BitstreamEntry::EndBlock:
-      State = Other;
-      continue;
-    }
-
-    // Read the given record.
-    SmallVector<uint64_t, 64> Record;
-    StringRef Blob;
-    unsigned Code = InStream.readRecord(Entry.ID, Record, &Blob);
-
-    // Handle module dependencies.
-    if (State == ControlBlock && Code == IMPORTS) {
-      // Load each of the imported PCH files.
-      unsigned Idx = 0, N = Record.size();
-      while (Idx < N) {
-        // Read information about the AST file.
-
-        // Skip the imported kind
-        ++Idx;
-
-        // Skip the import location
-        ++Idx;
-
-        // Load stored size/modification time.
-        off_t StoredSize = (off_t)Record[Idx++];
-        time_t StoredModTime = (time_t)Record[Idx++];
-
-        // Skip the stored signature.
-        // FIXME: we could read the signature out of the import and validate it.
-        ASTFileSignature StoredSignature = {
-            {{(uint32_t)Record[Idx++], (uint32_t)Record[Idx++],
-              (uint32_t)Record[Idx++], (uint32_t)Record[Idx++],
-              (uint32_t)Record[Idx++]}}};
-
-        // Skip the module name (currently this is only used for prebuilt
-        // modules while here we are only dealing with cached).
-        Idx += Record[Idx] + 1;
-
-        // Retrieve the imported file name.
-        unsigned Length = Record[Idx++];
-        SmallString<128> ImportedFile(Record.begin() + Idx,
-                                      Record.begin() + Idx + Length);
-        Idx += Length;
-
-        // Find the imported module file.
-        const FileEntry *DependsOnFile
-          = FileMgr.getFile(ImportedFile, /*openFile=*/false,
-                            /*cacheFailure=*/false);
-
-        if (!DependsOnFile)
-          return true;
-
-        // Save the information in ImportedModuleFileInfo so we can verify after
-        // loading all pcms.
-        ImportedModuleFiles.insert(std::make_pair(
-            DependsOnFile, ImportedModuleFileInfo(StoredSize, StoredModTime,
-                                                  StoredSignature)));
-
-        // Record the dependency.
-        unsigned DependsOnID = getModuleFileInfo(DependsOnFile).ID;
-        getModuleFileInfo(File).Dependencies.push_back(DependsOnID);
-      }
-
-      continue;
-    }
-
-    // Handle the identifier table
-    if (State == ASTBlock && Code == IDENTIFIER_TABLE && Record[0] > 0) {
-      typedef llvm::OnDiskIterableChainedHashTable<
-          InterestingASTIdentifierLookupTrait> InterestingIdentifierTable;
-      std::unique_ptr<InterestingIdentifierTable> Table(
-          InterestingIdentifierTable::Create(
-              (const unsigned char *)Blob.data() + Record[0],
-              (const unsigned char *)Blob.data() + sizeof(uint32_t),
-              (const unsigned char *)Blob.data()));
-      for (InterestingIdentifierTable::data_iterator D = Table->data_begin(),
-                                                     DEnd = Table->data_end();
-           D != DEnd; ++D) {
-        std::pair<StringRef, bool> Ident = *D;
-        if (Ident.second)
-          InterestingIdentifiers[Ident.first].push_back(ID);
-        else
-          (void)InterestingIdentifiers[Ident.first];
-      }
-    }
-
-    // Get Signature.
-    if (State == DiagnosticOptionsBlock && Code == SIGNATURE)
-      getModuleFileInfo(File).Signature = {
-          {{(uint32_t)Record[0], (uint32_t)Record[1], (uint32_t)Record[2],
-            (uint32_t)Record[3], (uint32_t)Record[4]}}};
-
-    // We don't care about this record.
-  }
-
-  return false;
-}
-
-namespace {
-
-/// Trait used to generate the identifier index as an on-disk hash
-/// table.
-class IdentifierIndexWriterTrait {
-public:
-  typedef StringRef key_type;
-  typedef StringRef key_type_ref;
-  typedef SmallVector<unsigned, 2> data_type;
-  typedef const SmallVector<unsigned, 2> &data_type_ref;
-  typedef unsigned hash_value_type;
-  typedef unsigned offset_type;
-
-  static hash_value_type ComputeHash(key_type_ref Key) {
-    return llvm::djbHash(Key);
-  }
-
-  std::pair<unsigned,unsigned>
-  EmitKeyDataLength(raw_ostream& Out, key_type_ref Key, data_type_ref Data) {
-    using namespace llvm::support;
-    endian::Writer LE(Out, little);
-    unsigned KeyLen = Key.size();
-    unsigned DataLen = Data.size() * 4;
-    LE.write<uint16_t>(KeyLen);
-    LE.write<uint16_t>(DataLen);
-    return std::make_pair(KeyLen, DataLen);
-  }
-
-  void EmitKey(raw_ostream& Out, key_type_ref Key, unsigned KeyLen) {
-    Out.write(Key.data(), KeyLen);
-  }
-
-  void EmitData(raw_ostream& Out, key_type_ref Key, data_type_ref Data,
-                unsigned DataLen) {
-    using namespace llvm::support;
-    for (unsigned I = 0, N = Data.size(); I != N; ++I)
-      endian::write<uint32_t>(Out, Data[I], little);
-  }
-};
-
-}
-
-bool GlobalModuleIndexBuilder::writeIndex(llvm::BitstreamWriter &Stream) {
-  for (auto MapEntry : ImportedModuleFiles) {
-    auto *File = MapEntry.first;
-    ImportedModuleFileInfo &Info = MapEntry.second;
-    if (getModuleFileInfo(File).Signature) {
-      if (getModuleFileInfo(File).Signature != Info.StoredSignature)
-        // Verify Signature.
-        return true;
-    } else if (Info.StoredSize != File->getSize() ||
-               Info.StoredModTime != File->getModificationTime())
-      // Verify Size and ModTime.
-      return true;
-  }
-
-  using namespace llvm;
-
-  // Emit the file header.
-  Stream.Emit((unsigned)'B', 8);
-  Stream.Emit((unsigned)'C', 8);
-  Stream.Emit((unsigned)'G', 8);
-  Stream.Emit((unsigned)'I', 8);
-
-  // Write the block-info block, which describes the records in this bitcode
-  // file.
-  emitBlockInfoBlock(Stream);
-
-  Stream.EnterSubblock(GLOBAL_INDEX_BLOCK_ID, 3);
-
-  // Write the metadata.
-  SmallVector<uint64_t, 2> Record;
-  Record.push_back(CurrentVersion);
-  Stream.EmitRecord(INDEX_METADATA, Record);
-
-  // Write the set of known module files.
-  for (ModuleFilesMap::iterator M = ModuleFiles.begin(),
-                                MEnd = ModuleFiles.end();
-       M != MEnd; ++M) {
-    Record.clear();
-    Record.push_back(M->second.ID);
-    Record.push_back(M->first->getSize());
-    Record.push_back(M->first->getModificationTime());
-
-    // File name
-    StringRef Name(M->first->getName());
-    Record.push_back(Name.size());
-    Record.append(Name.begin(), Name.end());
-
-    // Dependencies
-    Record.push_back(M->second.Dependencies.size());
-    Record.append(M->second.Dependencies.begin(), M->second.Dependencies.end());
-    Stream.EmitRecord(MODULE, Record);
-  }
-
-  // Write the identifier -> module file mapping.
-  {
-    llvm::OnDiskChainedHashTableGenerator<IdentifierIndexWriterTrait> Generator;
-    IdentifierIndexWriterTrait Trait;
-
-    // Populate the hash table.
-    for (InterestingIdentifierMap::iterator I = InterestingIdentifiers.begin(),
-                                            IEnd = InterestingIdentifiers.end();
-         I != IEnd; ++I) {
-      Generator.insert(I->first(), I->second, Trait);
-    }
-
-    // Create the on-disk hash table in a buffer.
-    SmallString<4096> IdentifierTable;
-    uint32_t BucketOffset;
-    {
-      using namespace llvm::support;
-      llvm::raw_svector_ostream Out(IdentifierTable);
-      // Make sure that no bucket is at offset 0
-      endian::write<uint32_t>(Out, 0, little);
-      BucketOffset = Generator.Emit(Out, Trait);
-    }
-
-    // Create a blob abbreviation
-    auto Abbrev = std::make_shared<BitCodeAbbrev>();
-    Abbrev->Add(BitCodeAbbrevOp(IDENTIFIER_INDEX));
-    Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
-    Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
-    unsigned IDTableAbbrev = Stream.EmitAbbrev(std::move(Abbrev));
-
-    // Write the identifier table
-    uint64_t Record[] = {IDENTIFIER_INDEX, BucketOffset};
-    Stream.EmitRecordWithBlob(IDTableAbbrev, Record, IdentifierTable);
-  }
-
-  Stream.ExitBlock();
-  return false;
-}
-
-GlobalModuleIndex::ErrorCode
-GlobalModuleIndex::writeIndex(FileManager &FileMgr,
-                              const PCHContainerReader &PCHContainerRdr,
-                              StringRef Path) {
-  llvm::SmallString<128> IndexPath;
-  IndexPath += Path;
-  llvm::sys::path::append(IndexPath, IndexFileName);
-
-  // Coordinate building the global index file with other processes that might
-  // try to do the same.
-  llvm::LockFileManager Locked(IndexPath);
-  switch (Locked) {
-  case llvm::LockFileManager::LFS_Error:
-    return EC_IOError;
-
-  case llvm::LockFileManager::LFS_Owned:
-    // We're responsible for building the index ourselves. Do so below.
-    break;
-
-  case llvm::LockFileManager::LFS_Shared:
-    // Someone else is responsible for building the index. We don't care
-    // when they finish, so we're done.
-    return EC_Building;
-  }
-
-  // The module index builder.
-  GlobalModuleIndexBuilder Builder(FileMgr, PCHContainerRdr);
-
-  // Load each of the module files.
-  std::error_code EC;
-  for (llvm::sys::fs::directory_iterator D(Path, EC), DEnd;
-       D != DEnd && !EC;
-       D.increment(EC)) {
-    // If this isn't a module file, we don't care.
-    if (llvm::sys::path::extension(D->path()) != ".pcm") {
-      // ... unless it's a .pcm.lock file, which indicates that someone is
-      // in the process of rebuilding a module. They'll rebuild the index
-      // at the end of that translation unit, so we don't have to.
-      if (llvm::sys::path::extension(D->path()) == ".pcm.lock")
-        return EC_Building;
-
-      continue;
-    }
-
-    // If we can't find the module file, skip it.
-    const FileEntry *ModuleFile = FileMgr.getFile(D->path());
-    if (!ModuleFile)
-      continue;
-
-    // Load this module file.
-    if (Builder.loadModuleFile(ModuleFile))
-      return EC_IOError;
-  }
-
-  // The output buffer, into which the global index will be written.
-  SmallVector<char, 16> OutputBuffer;
-  {
-    llvm::BitstreamWriter OutputStream(OutputBuffer);
-    if (Builder.writeIndex(OutputStream))
-      return EC_IOError;
-  }
-
-  // Write the global index file to a temporary file.
-  llvm::SmallString<128> IndexTmpPath;
-  int TmpFD;
-  if (llvm::sys::fs::createUniqueFile(IndexPath + "-%%%%%%%%", TmpFD,
-                                      IndexTmpPath))
-    return EC_IOError;
-
-  // Open the temporary global index file for output.
-  llvm::raw_fd_ostream Out(TmpFD, true);
-  if (Out.has_error())
-    return EC_IOError;
-
-  // Write the index.
-  Out.write(OutputBuffer.data(), OutputBuffer.size());
-  Out.close();
-  if (Out.has_error())
-    return EC_IOError;
-
-  // Remove the old index file. It isn't relevant any more.
-  llvm::sys::fs::remove(IndexPath);
-
-  // Rename the newly-written index file to the proper name.
-  if (llvm::sys::fs::rename(IndexTmpPath, IndexPath)) {
-    // Rename failed; just remove the
-    llvm::sys::fs::remove(IndexTmpPath);
-    return EC_IOError;
-  }
-
-  // We're done.
-  return EC_None;
-}
-
-namespace {
-  class GlobalIndexIdentifierIterator : public IdentifierIterator {
-    /// The current position within the identifier lookup table.
-    IdentifierIndexTable::key_iterator Current;
-
-    /// The end position within the identifier lookup table.
-    IdentifierIndexTable::key_iterator End;
-
-  public:
-    explicit GlobalIndexIdentifierIterator(IdentifierIndexTable &Idx) {
-      Current = Idx.key_begin();
-      End = Idx.key_end();
-    }
-
-    StringRef Next() override {
-      if (Current == End)
-        return StringRef();
-
-      StringRef Result = *Current;
-      ++Current;
-      return Result;
-    }
-  };
-}
-
-IdentifierIterator *GlobalModuleIndex::createIdentifierIterator() const {
-  IdentifierIndexTable &Table =
-    *static_cast<IdentifierIndexTable *>(IdentifierIndex);
-  return new GlobalIndexIdentifierIterator(Table);
-}