/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp

Bug Summary

File:	lib/Bitcode/Writer/BitcodeWriter.cpp
Warning:	line 420, column 9 1st function call argument is an uninitialized value

Annotated Source Code

Press '?' to see keyboard shortcuts

Show analyzer invocation

clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name BitcodeWriter.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-eagerly-assume -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -mrelocation-model pic -pic-level 2 -mthread-model posix -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -momit-leaf-frame-pointer -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-7/lib/clang/7.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-7~svn326425/build-llvm/lib/Bitcode/Writer -I /build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer -I /build/llvm-toolchain-snapshot-7~svn326425/build-llvm/include -I /build/llvm-toolchain-snapshot-7~svn326425/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/c++/7.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/x86_64-linux-gnu/c++/7.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/x86_64-linux-gnu/c++/7.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/c++/7.3.0/backward -internal-isystem /usr/include/clang/7.0.0/include/ -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-7/lib/clang/7.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -std=c++11 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-7~svn326425/build-llvm/lib/Bitcode/Writer -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -fobjc-runtime=gcc -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-checker optin.performance.Padding -analyzer-output=html -analyzer-config stable-report-filename=true -o /tmp/scan-build-2018-03-01-211340-26438-1 -x c++ /build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp

/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp

→

1//===- Bitcode/Writer/BitcodeWriter.cpp - Bitcode Writer ------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// Bitcode writer implementation.
11//
12//===----------------------------------------------------------------------===//

14#include "llvm/Bitcode/BitcodeWriter.h"
15#include "ValueEnumerator.h"
16#include "llvm/ADT/APFloat.h"
17#include "llvm/ADT/APInt.h"
18#include "llvm/ADT/ArrayRef.h"
19#include "llvm/ADT/DenseMap.h"
20#include "llvm/ADT/None.h"
21#include "llvm/ADT/Optional.h"
22#include "llvm/ADT/STLExtras.h"
23#include "llvm/ADT/SmallString.h"
24#include "llvm/ADT/SmallVector.h"
25#include "llvm/ADT/StringMap.h"
26#include "llvm/ADT/StringRef.h"
27#include "llvm/ADT/Triple.h"
28#include "llvm/Bitcode/BitCodes.h"
29#include "llvm/Bitcode/BitstreamWriter.h"
30#include "llvm/Bitcode/LLVMBitCodes.h"
31#include "llvm/IR/Attributes.h"
32#include "llvm/IR/BasicBlock.h"
33#include "llvm/IR/CallSite.h"
34#include "llvm/IR/Comdat.h"
35#include "llvm/IR/Constant.h"
36#include "llvm/IR/Constants.h"
37#include "llvm/IR/DebugInfoMetadata.h"
38#include "llvm/IR/DebugLoc.h"
39#include "llvm/IR/DerivedTypes.h"
40#include "llvm/IR/Function.h"
41#include "llvm/IR/GlobalAlias.h"
42#include "llvm/IR/GlobalIFunc.h"
43#include "llvm/IR/GlobalObject.h"
44#include "llvm/IR/GlobalValue.h"
45#include "llvm/IR/GlobalVariable.h"
46#include "llvm/IR/InlineAsm.h"
47#include "llvm/IR/InstrTypes.h"
48#include "llvm/IR/Instruction.h"
49#include "llvm/IR/Instructions.h"
50#include "llvm/IR/LLVMContext.h"
51#include "llvm/IR/Metadata.h"
52#include "llvm/IR/Module.h"
53#include "llvm/IR/ModuleSummaryIndex.h"
54#include "llvm/IR/Operator.h"
55#include "llvm/IR/Type.h"
56#include "llvm/IR/UseListOrder.h"
57#include "llvm/IR/Value.h"
58#include "llvm/IR/ValueSymbolTable.h"
59#include "llvm/MC/StringTableBuilder.h"
60#include "llvm/Object/IRSymtab.h"
61#include "llvm/Support/AtomicOrdering.h"
62#include "llvm/Support/Casting.h"
63#include "llvm/Support/CommandLine.h"
64#include "llvm/Support/Endian.h"
65#include "llvm/Support/Error.h"
66#include "llvm/Support/ErrorHandling.h"
67#include "llvm/Support/MathExtras.h"
68#include "llvm/Support/SHA1.h"
69#include "llvm/Support/TargetRegistry.h"
70#include "llvm/Support/raw_ostream.h"
71#include <algorithm>
72#include <cassert>
73#include <cstddef>
74#include <cstdint>
75#include <iterator>
76#include <map>
77#include <memory>
78#include <string>
79#include <utility>
80#include <vector>

82using namespace llvm;

84static cl::opt<unsigned>
  IndexThreshold("bitcode-mdindex-threshold", cl::Hidden, cl::init(25),
                 cl::desc("Number of metadatas above which we emit an index "
                          "to enable lazy-loading"));

89cl::opt<bool> WriteRelBFToSummary(
  "write-relbf-to-summary", cl::Hidden, cl::init(false),
  cl::desc("Write relative block frequency to function summary "));
92namespace {

94/// These are manifest constants used by the bitcode writer. They do not need to
95/// be kept in sync with the reader, but need to be consistent within this file.
96enum {
// VALUE_SYMTAB_BLOCK abbrev id's.
VST_ENTRY_8_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
VST_ENTRY_7_ABBREV,
VST_ENTRY_6_ABBREV,
VST_BBENTRY_6_ABBREV,

// CONSTANTS_BLOCK abbrev id's.
CONSTANTS_SETTYPE_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
CONSTANTS_INTEGER_ABBREV,
CONSTANTS_CE_CAST_Abbrev,
CONSTANTS_NULL_Abbrev,

// FUNCTION_BLOCK abbrev id's.
FUNCTION_INST_LOAD_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
FUNCTION_INST_BINOP_ABBREV,
FUNCTION_INST_BINOP_FLAGS_ABBREV,
FUNCTION_INST_CAST_ABBREV,
FUNCTION_INST_RET_VOID_ABBREV,
FUNCTION_INST_RET_VAL_ABBREV,
FUNCTION_INST_UNREACHABLE_ABBREV,
FUNCTION_INST_GEP_ABBREV,
118};

120/// Abstract class to manage the bitcode writing, subclassed for each bitcode
121/// file type.
122class BitcodeWriterBase {
123protected:
/// The stream created and owned by the client.
BitstreamWriter &Stream;

StringTableBuilder &StrtabBuilder;

129public:
/// Constructs a BitcodeWriterBase object that writes to the provided
/// \p Stream.
BitcodeWriterBase(BitstreamWriter &Stream, StringTableBuilder &StrtabBuilder)
    : Stream(Stream), StrtabBuilder(StrtabBuilder) {}

135protected:
void writeBitcodeHeader();
void writeModuleVersion();
138};

140void BitcodeWriterBase::writeModuleVersion() {
// VERSION: [version#]
Stream.EmitRecord(bitc::MODULE_CODE_VERSION, ArrayRef<uint64_t>{2});
143}

145/// Base class to manage the module bitcode writing, currently subclassed for
146/// ModuleBitcodeWriter and ThinLinkBitcodeWriter.
147class ModuleBitcodeWriterBase : public BitcodeWriterBase {
148protected:
/// The Module to write to bitcode.
const Module &M;

/// Enumerates ids for all values in the module.
ValueEnumerator VE;

/// Optional per-module index to write for ThinLTO.
const ModuleSummaryIndex *Index;

/// Map that holds the correspondence between GUIDs in the summary index,
/// that came from indirect call profiles, and a value id generated by this
/// class to use in the VST and summary block records.
std::map<GlobalValue::GUID, unsigned> GUIDToValueIdMap;

/// Tracks the last value id recorded in the GUIDToValueMap.
unsigned GlobalValueId;

/// Saves the offset of the VSTOffset record that must eventually be
/// backpatched with the offset of the actual VST.
uint64_t VSTOffsetPlaceholder = 0;

170public:
/// Constructs a ModuleBitcodeWriterBase object for the given Module,
/// writing to the provided \p Buffer.
ModuleBitcodeWriterBase(const Module &M, StringTableBuilder &StrtabBuilder,
                        BitstreamWriter &Stream,
                        bool ShouldPreserveUseListOrder,
                        const ModuleSummaryIndex *Index)
    : BitcodeWriterBase(Stream, StrtabBuilder), M(M),
      VE(M, ShouldPreserveUseListOrder), Index(Index) {
  // Assign ValueIds to any callee values in the index that came from
  // indirect call profiles and were recorded as a GUID not a Value*
  // (which would have been assigned an ID by the ValueEnumerator).
  // The starting ValueId is just after the number of values in the
  // ValueEnumerator, so that they can be emitted in the VST.
  GlobalValueId = VE.getValues().size();
  if (!Index)
    return;
  for (const auto &GUIDSummaryLists : *Index)
    // Examine all summaries for this GUID.
    for (auto &Summary : GUIDSummaryLists.second.SummaryList)
      if (auto FS = dyn_cast<FunctionSummary>(Summary.get()))
        // For each call in the function summary, see if the call
        // is to a GUID (which means it is for an indirect call,
        // otherwise we would have a Value for it). If so, synthesize
        // a value id.
        for (auto &CallEdge : FS->calls())
          if (!CallEdge.first.getValue())
            assignValueId(CallEdge.first.getGUID());
}

200protected:
void writePerModuleGlobalValueSummary();

203private:
void writePerModuleFunctionSummaryRecord(SmallVector<uint64_t, 64> &NameVals,
                                         GlobalValueSummary *Summary,
                                         unsigned ValueID,
                                         unsigned FSCallsAbbrev,
                                         unsigned FSCallsProfileAbbrev,
                                         const Function &F);
void writeModuleLevelReferences(const GlobalVariable &V,
                                SmallVector<uint64_t, 64> &NameVals,
                                unsigned FSModRefsAbbrev);

void assignValueId(GlobalValue::GUID ValGUID) {
  GUIDToValueIdMap[ValGUID] = ++GlobalValueId;
}

unsigned getValueId(GlobalValue::GUID ValGUID) {
  const auto &VMI = GUIDToValueIdMap.find(ValGUID);
  // Expect that any GUID value had a value Id assigned by an
  // earlier call to assignValueId.
  assert(VMI != GUIDToValueIdMap.end() &&(static_cast <bool> (VMI != GUIDToValueIdMap.end() &&
 "GUID does not have assigned value Id") ? void (0) : __assert_fail
 ("VMI != GUIDToValueIdMap.end() && \"GUID does not have assigned value Id\""
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 223, __extension__ __PRETTY_FUNCTION__))
         "GUID does not have assigned value Id")(static_cast <bool> (VMI != GUIDToValueIdMap.end() &&
 "GUID does not have assigned value Id") ? void (0) : __assert_fail
 ("VMI != GUIDToValueIdMap.end() && \"GUID does not have assigned value Id\""
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 223, __extension__ __PRETTY_FUNCTION__));
  return VMI->second;
}

// Helper to get the valueId for the type of value recorded in VI.
unsigned getValueId(ValueInfo VI) {
  if (!VI.getValue())
    return getValueId(VI.getGUID());
  return VE.getValueID(VI.getValue());
}

std::map<GlobalValue::GUID, unsigned> &valueIds() { return GUIDToValueIdMap; }
235};

237/// Class to manage the bitcode writing for a module.
238class ModuleBitcodeWriter : public ModuleBitcodeWriterBase {
/// Pointer to the buffer allocated by caller for bitcode writing.
const SmallVectorImpl<char> &Buffer;

/// True if a module hash record should be written.
bool GenerateHash;

/// If non-null, when GenerateHash is true, the resulting hash is written
/// into ModHash.
ModuleHash *ModHash;

SHA1 Hasher;

/// The start bit of the identification block.
uint64_t BitcodeStartBit;

254public:
/// Constructs a ModuleBitcodeWriter object for the given Module,
/// writing to the provided \p Buffer.
ModuleBitcodeWriter(const Module &M, SmallVectorImpl<char> &Buffer,
                    StringTableBuilder &StrtabBuilder,
                    BitstreamWriter &Stream, bool ShouldPreserveUseListOrder,
                    const ModuleSummaryIndex *Index, bool GenerateHash,
                    ModuleHash *ModHash = nullptr)
    : ModuleBitcodeWriterBase(M, StrtabBuilder, Stream,
                              ShouldPreserveUseListOrder, Index),
      Buffer(Buffer), GenerateHash(GenerateHash), ModHash(ModHash),
      BitcodeStartBit(Stream.GetCurrentBitNo()) {}

/// Emit the current module to the bitstream.
void write();

270private:
uint64_t bitcodeStartBit() { return BitcodeStartBit; }

size_t addToStrtab(StringRef Str);

void writeAttributeGroupTable();
void writeAttributeTable();
void writeTypeTable();
void writeComdats();
void writeValueSymbolTableForwardDecl();
void writeModuleInfo();
void writeValueAsMetadata(const ValueAsMetadata *MD,
                          SmallVectorImpl<uint64_t> &Record);
void writeMDTuple(const MDTuple *N, SmallVectorImpl<uint64_t> &Record,
                  unsigned Abbrev);
unsigned createDILocationAbbrev();
void writeDILocation(const DILocation *N, SmallVectorImpl<uint64_t> &Record,
                     unsigned &Abbrev);
unsigned createGenericDINodeAbbrev();
void writeGenericDINode(const GenericDINode *N,
                        SmallVectorImpl<uint64_t> &Record, unsigned &Abbrev);
void writeDISubrange(const DISubrange *N, SmallVectorImpl<uint64_t> &Record,
                     unsigned Abbrev);
void writeDIEnumerator(const DIEnumerator *N,
                       SmallVectorImpl<uint64_t> &Record, unsigned Abbrev);
void writeDIBasicType(const DIBasicType *N, SmallVectorImpl<uint64_t> &Record,
                      unsigned Abbrev);
void writeDIDerivedType(const DIDerivedType *N,
                        SmallVectorImpl<uint64_t> &Record, unsigned Abbrev);
void writeDICompositeType(const DICompositeType *N,
                          SmallVectorImpl<uint64_t> &Record, unsigned Abbrev);
void writeDISubroutineType(const DISubroutineType *N,
                           SmallVectorImpl<uint64_t> &Record,
                           unsigned Abbrev);
void writeDIFile(const DIFile *N, SmallVectorImpl<uint64_t> &Record,
                 unsigned Abbrev);
void writeDICompileUnit(const DICompileUnit *N,
                        SmallVectorImpl<uint64_t> &Record, unsigned Abbrev);
void writeDISubprogram(const DISubprogram *N,
                       SmallVectorImpl<uint64_t> &Record, unsigned Abbrev);
void writeDILexicalBlock(const DILexicalBlock *N,
                         SmallVectorImpl<uint64_t> &Record, unsigned Abbrev);
void writeDILexicalBlockFile(const DILexicalBlockFile *N,
                             SmallVectorImpl<uint64_t> &Record,
                             unsigned Abbrev);
void writeDINamespace(const DINamespace *N, SmallVectorImpl<uint64_t> &Record,
                      unsigned Abbrev);
void writeDIMacro(const DIMacro *N, SmallVectorImpl<uint64_t> &Record,
                  unsigned Abbrev);
void writeDIMacroFile(const DIMacroFile *N, SmallVectorImpl<uint64_t> &Record,
                      unsigned Abbrev);
void writeDIModule(const DIModule *N, SmallVectorImpl<uint64_t> &Record,
                   unsigned Abbrev);
void writeDITemplateTypeParameter(const DITemplateTypeParameter *N,
                                  SmallVectorImpl<uint64_t> &Record,
                                  unsigned Abbrev);
void writeDITemplateValueParameter(const DITemplateValueParameter *N,
                                   SmallVectorImpl<uint64_t> &Record,
                                   unsigned Abbrev);
void writeDIGlobalVariable(const DIGlobalVariable *N,
                           SmallVectorImpl<uint64_t> &Record,
                           unsigned Abbrev);
void writeDILocalVariable(const DILocalVariable *N,
                          SmallVectorImpl<uint64_t> &Record, unsigned Abbrev);
void writeDIExpression(const DIExpression *N,
                       SmallVectorImpl<uint64_t> &Record, unsigned Abbrev);
void writeDIGlobalVariableExpression(const DIGlobalVariableExpression *N,
                                     SmallVectorImpl<uint64_t> &Record,
                                     unsigned Abbrev);
void writeDIObjCProperty(const DIObjCProperty *N,
                         SmallVectorImpl<uint64_t> &Record, unsigned Abbrev);
void writeDIImportedEntity(const DIImportedEntity *N,
                           SmallVectorImpl<uint64_t> &Record,
                           unsigned Abbrev);
unsigned createNamedMetadataAbbrev();
void writeNamedMetadata(SmallVectorImpl<uint64_t> &Record);
unsigned createMetadataStringsAbbrev();
void writeMetadataStrings(ArrayRef<const Metadata *> Strings,
                          SmallVectorImpl<uint64_t> &Record);
void writeMetadataRecords(ArrayRef<const Metadata *> MDs,
                          SmallVectorImpl<uint64_t> &Record,
                          std::vector<unsigned> *MDAbbrevs = nullptr,
                          std::vector<uint64_t> *IndexPos = nullptr);
void writeModuleMetadata();
void writeFunctionMetadata(const Function &F);
void writeFunctionMetadataAttachment(const Function &F);
void writeGlobalVariableMetadataAttachment(const GlobalVariable &GV);
void pushGlobalMetadataAttachment(SmallVectorImpl<uint64_t> &Record,
                                  const GlobalObject &GO);
void writeModuleMetadataKinds();
void writeOperandBundleTags();
void writeSyncScopeNames();
void writeConstants(unsigned FirstVal, unsigned LastVal, bool isGlobal);
void writeModuleConstants();
bool pushValueAndType(const Value *V, unsigned InstID,
                      SmallVectorImpl<unsigned> &Vals);
void writeOperandBundles(ImmutableCallSite CS, unsigned InstID);
void pushValue(const Value *V, unsigned InstID,
               SmallVectorImpl<unsigned> &Vals);
void pushValueSigned(const Value *V, unsigned InstID,
                     SmallVectorImpl<uint64_t> &Vals);
void writeInstruction(const Instruction &I, unsigned InstID,
                      SmallVectorImpl<unsigned> &Vals);
void writeFunctionLevelValueSymbolTable(const ValueSymbolTable &VST);
void writeGlobalValueSymbolTable(
    DenseMap<const Function *, uint64_t> &FunctionToBitcodeIndex);
void writeUseList(UseListOrder &&Order);
void writeUseListBlock(const Function *F);
void
writeFunction(const Function &F,
              DenseMap<const Function *, uint64_t> &FunctionToBitcodeIndex);
void writeBlockInfo();
void writeModuleHash(size_t BlockStartPos);

unsigned getEncodedSyncScopeID(SyncScope::ID SSID) {
  return unsigned(SSID);
}
387};

389/// Class to manage the bitcode writing for a combined index.
390class IndexBitcodeWriter : public BitcodeWriterBase {
/// The combined index to write to bitcode.
const ModuleSummaryIndex &Index;

/// When writing a subset of the index for distributed backends, client
/// provides a map of modules to the corresponding GUIDs/summaries to write.
const std::map<std::string, GVSummaryMapTy> *ModuleToSummariesForIndex;

/// Map that holds the correspondence between the GUID used in the combined
/// index and a value id generated by this class to use in references.
std::map<GlobalValue::GUID, unsigned> GUIDToValueIdMap;

/// Tracks the last value id recorded in the GUIDToValueMap.
unsigned GlobalValueId = 0;

405public:
/// Constructs a IndexBitcodeWriter object for the given combined index,
/// writing to the provided \p Buffer. When writing a subset of the index
/// for a distributed backend, provide a \p ModuleToSummariesForIndex map.
IndexBitcodeWriter(BitstreamWriter &Stream, StringTableBuilder &StrtabBuilder,
                   const ModuleSummaryIndex &Index,
                   const std::map<std::string, GVSummaryMapTy>
                       *ModuleToSummariesForIndex = nullptr)
    : BitcodeWriterBase(Stream, StrtabBuilder), Index(Index),
      ModuleToSummariesForIndex(ModuleToSummariesForIndex) {
  // Assign unique value ids to all summaries to be written, for use
  // in writing out the call graph edges. Save the mapping from GUID
  // to the new global value id to use when writing those edges, which
  // are currently saved in the index in terms of GUID.
  forEachSummary([&](GVInfo I, bool) {
    GUIDToValueIdMap[I.first] = ++GlobalValueId;
  });
}

/// The below iterator returns the GUID and associated summary.
using GVInfo = std::pair<GlobalValue::GUID, GlobalValueSummary *>;

/// Calls the callback for each value GUID and summary to be written to
/// bitcode. This hides the details of whether they are being pulled from the
/// entire index or just those in a provided ModuleToSummariesForIndex map.
template<typename Functor>
void forEachSummary(Functor Callback) {
  if (ModuleToSummariesForIndex) {
    for (auto &M : *ModuleToSummariesForIndex)
      for (auto &Summary : M.second) {
        Callback(Summary, false);
        // Ensure aliasee is handled, e.g. for assigning a valueId,
        // even if we are not importing the aliasee directly (the
        // imported alias will contain a copy of aliasee).
        if (auto *AS = dyn_cast<AliasSummary>(Summary.getSecond()))
          Callback({AS->getAliaseeGUID(), &AS->getAliasee()}, true);
      }
  } else {
    for (auto &Summaries : Index)
      for (auto &Summary : Summaries.second.SummaryList)
        Callback({Summaries.first, Summary.get()}, false);
  }
}

/// Calls the callback for each entry in the modulePaths StringMap that
/// should be written to the module path string table. This hides the details
/// of whether they are being pulled from the entire index or just those in a
/// provided ModuleToSummariesForIndex map.
template <typename Functor> void forEachModule(Functor Callback) {
  if (ModuleToSummariesForIndex) {
    for (const auto &M : *ModuleToSummariesForIndex) {
      const auto &MPI = Index.modulePaths().find(M.first);
      if (MPI == Index.modulePaths().end()) {
        // This should only happen if the bitcode file was empty, in which
        // case we shouldn't be importing (the ModuleToSummariesForIndex
        // would only include the module we are writing and index for).
        assert(ModuleToSummariesForIndex->size() == 1)(static_cast <bool> (ModuleToSummariesForIndex->size
() == 1) ? void (0) : __assert_fail ("ModuleToSummariesForIndex->size() == 1"
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 461, __extension__ __PRETTY_FUNCTION__));
        continue;
      }
      Callback(*MPI);
    }
  } else {
    for (const auto &MPSE : Index.modulePaths())
      Callback(MPSE);
  }
}

/// Main entry point for writing a combined index to bitcode.
void write();

475private:
void writeModStrings();
void writeCombinedGlobalValueSummary();

Optional<unsigned> getValueId(GlobalValue::GUID ValGUID) {
  auto VMI = GUIDToValueIdMap.find(ValGUID);
  if (VMI == GUIDToValueIdMap.end())
    return None;
  return VMI->second;
}

std::map<GlobalValue::GUID, unsigned> &valueIds() { return GUIDToValueIdMap; }
487};

489} // end anonymous namespace

491static unsigned getEncodedCastOpcode(unsigned Opcode) {
switch (Opcode) {
default: llvm_unreachable("Unknown cast instruction!")::llvm::llvm_unreachable_internal("Unknown cast instruction!"
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 493);
case Instruction::Trunc   : return bitc::CAST_TRUNC;
case Instruction::ZExt    : return bitc::CAST_ZEXT;
case Instruction::SExt    : return bitc::CAST_SEXT;
case Instruction::FPToUI  : return bitc::CAST_FPTOUI;
case Instruction::FPToSI  : return bitc::CAST_FPTOSI;
case Instruction::UIToFP  : return bitc::CAST_UITOFP;
case Instruction::SIToFP  : return bitc::CAST_SITOFP;
case Instruction::FPTrunc : return bitc::CAST_FPTRUNC;
case Instruction::FPExt   : return bitc::CAST_FPEXT;
case Instruction::PtrToInt: return bitc::CAST_PTRTOINT;
case Instruction::IntToPtr: return bitc::CAST_INTTOPTR;
case Instruction::BitCast : return bitc::CAST_BITCAST;
case Instruction::AddrSpaceCast: return bitc::CAST_ADDRSPACECAST;
}
508}

510static unsigned getEncodedBinaryOpcode(unsigned Opcode) {
switch (Opcode) {
default: llvm_unreachable("Unknown binary instruction!")::llvm::llvm_unreachable_internal("Unknown binary instruction!"
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 512);
case Instruction::Add:
case Instruction::FAdd: return bitc::BINOP_ADD;
case Instruction::Sub:
case Instruction::FSub: return bitc::BINOP_SUB;
case Instruction::Mul:
case Instruction::FMul: return bitc::BINOP_MUL;
case Instruction::UDiv: return bitc::BINOP_UDIV;
case Instruction::FDiv:
case Instruction::SDiv: return bitc::BINOP_SDIV;
case Instruction::URem: return bitc::BINOP_UREM;
case Instruction::FRem:
case Instruction::SRem: return bitc::BINOP_SREM;
case Instruction::Shl:  return bitc::BINOP_SHL;
case Instruction::LShr: return bitc::BINOP_LSHR;
case Instruction::AShr: return bitc::BINOP_ASHR;
case Instruction::And:  return bitc::BINOP_AND;
case Instruction::Or:   return bitc::BINOP_OR;
case Instruction::Xor:  return bitc::BINOP_XOR;
}
532}

534static unsigned getEncodedRMWOperation(AtomicRMWInst::BinOp Op) {
switch (Op) {
default: llvm_unreachable("Unknown RMW operation!")::llvm::llvm_unreachable_internal("Unknown RMW operation!", "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 536);
case AtomicRMWInst::Xchg: return bitc::RMW_XCHG;
case AtomicRMWInst::Add: return bitc::RMW_ADD;
case AtomicRMWInst::Sub: return bitc::RMW_SUB;
case AtomicRMWInst::And: return bitc::RMW_AND;
case AtomicRMWInst::Nand: return bitc::RMW_NAND;
case AtomicRMWInst::Or: return bitc::RMW_OR;
case AtomicRMWInst::Xor: return bitc::RMW_XOR;
case AtomicRMWInst::Max: return bitc::RMW_MAX;
case AtomicRMWInst::Min: return bitc::RMW_MIN;
case AtomicRMWInst::UMax: return bitc::RMW_UMAX;
case AtomicRMWInst::UMin: return bitc::RMW_UMIN;
}
549}

551static unsigned getEncodedOrdering(AtomicOrdering Ordering) {
switch (Ordering) {
case AtomicOrdering::NotAtomic: return bitc::ORDERING_NOTATOMIC;
case AtomicOrdering::Unordered: return bitc::ORDERING_UNORDERED;
case AtomicOrdering::Monotonic: return bitc::ORDERING_MONOTONIC;
case AtomicOrdering::Acquire: return bitc::ORDERING_ACQUIRE;
case AtomicOrdering::Release: return bitc::ORDERING_RELEASE;
case AtomicOrdering::AcquireRelease: return bitc::ORDERING_ACQREL;
case AtomicOrdering::SequentiallyConsistent: return bitc::ORDERING_SEQCST;
}
llvm_unreachable("Invalid ordering")::llvm::llvm_unreachable_internal("Invalid ordering", "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 561);
562}

564static void writeStringRecord(BitstreamWriter &Stream, unsigned Code,
                            StringRef Str, unsigned AbbrevToUse) {
SmallVector<unsigned, 64> Vals;

// Code: [strchar x N]
for (unsigned i = 0, e = Str.size(); i != e; ++i) {
  if (AbbrevToUse && !BitCodeAbbrevOp::isChar6(Str[i]))
    AbbrevToUse = 0;
  Vals.push_back(Str[i]);
}

// Emit the finished record.
Stream.EmitRecord(Code, Vals, AbbrevToUse);
577}

579static uint64_t getAttrKindEncoding(Attribute::AttrKind Kind) {
switch (Kind) {
case Attribute::Alignment:
  return bitc::ATTR_KIND_ALIGNMENT;
case Attribute::AllocSize:
  return bitc::ATTR_KIND_ALLOC_SIZE;
case Attribute::AlwaysInline:
  return bitc::ATTR_KIND_ALWAYS_INLINE;
case Attribute::ArgMemOnly:
  return bitc::ATTR_KIND_ARGMEMONLY;
case Attribute::Builtin:
  return bitc::ATTR_KIND_BUILTIN;
case Attribute::ByVal:
  return bitc::ATTR_KIND_BY_VAL;
case Attribute::Convergent:
  return bitc::ATTR_KIND_CONVERGENT;
case Attribute::InAlloca:
  return bitc::ATTR_KIND_IN_ALLOCA;
case Attribute::Cold:
  return bitc::ATTR_KIND_COLD;
case Attribute::InaccessibleMemOnly:
  return bitc::ATTR_KIND_INACCESSIBLEMEM_ONLY;
case Attribute::InaccessibleMemOrArgMemOnly:
  return bitc::ATTR_KIND_INACCESSIBLEMEM_OR_ARGMEMONLY;
case Attribute::InlineHint:
  return bitc::ATTR_KIND_INLINE_HINT;
case Attribute::InReg:
  return bitc::ATTR_KIND_IN_REG;
case Attribute::JumpTable:
  return bitc::ATTR_KIND_JUMP_TABLE;
case Attribute::MinSize:
  return bitc::ATTR_KIND_MIN_SIZE;
case Attribute::Naked:
  return bitc::ATTR_KIND_NAKED;
case Attribute::Nest:
  return bitc::ATTR_KIND_NEST;
case Attribute::NoAlias:
  return bitc::ATTR_KIND_NO_ALIAS;
case Attribute::NoBuiltin:
  return bitc::ATTR_KIND_NO_BUILTIN;
case Attribute::NoCapture:
  return bitc::ATTR_KIND_NO_CAPTURE;
case Attribute::NoDuplicate:
  return bitc::ATTR_KIND_NO_DUPLICATE;
case Attribute::NoImplicitFloat:
  return bitc::ATTR_KIND_NO_IMPLICIT_FLOAT;
case Attribute::NoInline:
  return bitc::ATTR_KIND_NO_INLINE;
case Attribute::NoRecurse:
  return bitc::ATTR_KIND_NO_RECURSE;
case Attribute::NonLazyBind:
  return bitc::ATTR_KIND_NON_LAZY_BIND;
case Attribute::NonNull:
  return bitc::ATTR_KIND_NON_NULL;
case Attribute::Dereferenceable:
  return bitc::ATTR_KIND_DEREFERENCEABLE;
case Attribute::DereferenceableOrNull:
  return bitc::ATTR_KIND_DEREFERENCEABLE_OR_NULL;
case Attribute::NoRedZone:
  return bitc::ATTR_KIND_NO_RED_ZONE;
case Attribute::NoReturn:
  return bitc::ATTR_KIND_NO_RETURN;
case Attribute::NoUnwind:
  return bitc::ATTR_KIND_NO_UNWIND;
case Attribute::OptimizeForSize:
  return bitc::ATTR_KIND_OPTIMIZE_FOR_SIZE;
case Attribute::OptimizeNone:
  return bitc::ATTR_KIND_OPTIMIZE_NONE;
case Attribute::ReadNone:
  return bitc::ATTR_KIND_READ_NONE;
case Attribute::ReadOnly:
  return bitc::ATTR_KIND_READ_ONLY;
case Attribute::Returned:
  return bitc::ATTR_KIND_RETURNED;
case Attribute::ReturnsTwice:
  return bitc::ATTR_KIND_RETURNS_TWICE;
case Attribute::SExt:
  return bitc::ATTR_KIND_S_EXT;
case Attribute::Speculatable:
  return bitc::ATTR_KIND_SPECULATABLE;
case Attribute::StackAlignment:
  return bitc::ATTR_KIND_STACK_ALIGNMENT;
case Attribute::StackProtect:
  return bitc::ATTR_KIND_STACK_PROTECT;
case Attribute::StackProtectReq:
  return bitc::ATTR_KIND_STACK_PROTECT_REQ;
case Attribute::StackProtectStrong:
  return bitc::ATTR_KIND_STACK_PROTECT_STRONG;
case Attribute::SafeStack:
  return bitc::ATTR_KIND_SAFESTACK;
case Attribute::StrictFP:
  return bitc::ATTR_KIND_STRICT_FP;
case Attribute::StructRet:
  return bitc::ATTR_KIND_STRUCT_RET;
case Attribute::SanitizeAddress:
  return bitc::ATTR_KIND_SANITIZE_ADDRESS;
case Attribute::SanitizeHWAddress:
  return bitc::ATTR_KIND_SANITIZE_HWADDRESS;
case Attribute::SanitizeThread:
  return bitc::ATTR_KIND_SANITIZE_THREAD;
case Attribute::SanitizeMemory:
  return bitc::ATTR_KIND_SANITIZE_MEMORY;
case Attribute::SwiftError:
  return bitc::ATTR_KIND_SWIFT_ERROR;
case Attribute::SwiftSelf:
  return bitc::ATTR_KIND_SWIFT_SELF;
case Attribute::UWTable:
  return bitc::ATTR_KIND_UW_TABLE;
case Attribute::WriteOnly:
  return bitc::ATTR_KIND_WRITEONLY;
case Attribute::ZExt:
  return bitc::ATTR_KIND_Z_EXT;
case Attribute::EndAttrKinds:
  llvm_unreachable("Can not encode end-attribute kinds marker.")::llvm::llvm_unreachable_internal("Can not encode end-attribute kinds marker."
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 692);
case Attribute::None:
  llvm_unreachable("Can not encode none-attribute.")::llvm::llvm_unreachable_internal("Can not encode none-attribute."
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 694);
}

llvm_unreachable("Trying to encode unknown attribute")::llvm::llvm_unreachable_internal("Trying to encode unknown attribute"
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 697);
698}

700void ModuleBitcodeWriter::writeAttributeGroupTable() {
const std::vector<ValueEnumerator::IndexAndAttrSet> &AttrGrps =
    VE.getAttributeGroups();
if (AttrGrps.empty()) return;

Stream.EnterSubblock(bitc::PARAMATTR_GROUP_BLOCK_ID, 3);

SmallVector<uint64_t, 64> Record;
for (ValueEnumerator::IndexAndAttrSet Pair : AttrGrps) {
  unsigned AttrListIndex = Pair.first;
  AttributeSet AS = Pair.second;
  Record.push_back(VE.getAttributeGroupID(Pair));
  Record.push_back(AttrListIndex);

  for (Attribute Attr : AS) {
    if (Attr.isEnumAttribute()) {
      Record.push_back(0);
      Record.push_back(getAttrKindEncoding(Attr.getKindAsEnum()));
    } else if (Attr.isIntAttribute()) {
      Record.push_back(1);
      Record.push_back(getAttrKindEncoding(Attr.getKindAsEnum()));
      Record.push_back(Attr.getValueAsInt());
    } else {
      StringRef Kind = Attr.getKindAsString();
      StringRef Val = Attr.getValueAsString();

      Record.push_back(Val.empty() ? 3 : 4);
      Record.append(Kind.begin(), Kind.end());
      Record.push_back(0);
      if (!Val.empty()) {
        Record.append(Val.begin(), Val.end());
        Record.push_back(0);
      }
    }
  }

  Stream.EmitRecord(bitc::PARAMATTR_GRP_CODE_ENTRY, Record);
  Record.clear();
}

Stream.ExitBlock();
741}

743void ModuleBitcodeWriter::writeAttributeTable() {
const std::vector<AttributeList> &Attrs = VE.getAttributeLists();
if (Attrs.empty()) return;

Stream.EnterSubblock(bitc::PARAMATTR_BLOCK_ID, 3);

SmallVector<uint64_t, 64> Record;
for (unsigned i = 0, e = Attrs.size(); i != e; ++i) {
  AttributeList AL = Attrs[i];
  for (unsigned i = AL.index_begin(), e = AL.index_end(); i != e; ++i) {
    AttributeSet AS = AL.getAttributes(i);
    if (AS.hasAttributes())
      Record.push_back(VE.getAttributeGroupID({i, AS}));
  }

  Stream.EmitRecord(bitc::PARAMATTR_CODE_ENTRY, Record);
  Record.clear();
}

Stream.ExitBlock();
763}

765/// WriteTypeTable - Write out the type table for a module.
766void ModuleBitcodeWriter::writeTypeTable() {
const ValueEnumerator::TypeList &TypeList = VE.getTypes();

Stream.EnterSubblock(bitc::TYPE_BLOCK_ID_NEW, 4 /*count from # abbrevs */);
SmallVector<uint64_t, 64> TypeVals;

uint64_t NumBits = VE.computeBitsRequiredForTypeIndicies();

// Abbrev for TYPE_CODE_POINTER.
auto Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_POINTER));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
Abbv->Add(BitCodeAbbrevOp(0));  // Addrspace = 0
unsigned PtrAbbrev = Stream.EmitAbbrev(std::move(Abbv));

// Abbrev for TYPE_CODE_FUNCTION.
Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_FUNCTION));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1));  // isvararg
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
unsigned FunctionAbbrev = Stream.EmitAbbrev(std::move(Abbv));

// Abbrev for TYPE_CODE_STRUCT_ANON.
Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT_ANON));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1));  // ispacked
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
unsigned StructAnonAbbrev = Stream.EmitAbbrev(std::move(Abbv));

// Abbrev for TYPE_CODE_STRUCT_NAME.
Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT_NAME));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
unsigned StructNameAbbrev = Stream.EmitAbbrev(std::move(Abbv));

// Abbrev for TYPE_CODE_STRUCT_NAMED.
Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_STRUCT_NAMED));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1));  // ispacked
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
unsigned StructNamedAbbrev = Stream.EmitAbbrev(std::move(Abbv));

// Abbrev for TYPE_CODE_ARRAY.
Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_ARRAY));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));   // size
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, NumBits));
unsigned ArrayAbbrev = Stream.EmitAbbrev(std::move(Abbv));

// Emit an entry count so the reader can reserve space.
TypeVals.push_back(TypeList.size());
Stream.EmitRecord(bitc::TYPE_CODE_NUMENTRY, TypeVals);
TypeVals.clear();

// Loop over all of the types, emitting each in turn.
for (unsigned i = 0, e = TypeList.size(); i != e; ++i) {
  Type *T = TypeList[i];
  int AbbrevToUse = 0;
  unsigned Code = 0;

  switch (T->getTypeID()) {
  case Type::VoidTyID:      Code = bitc::TYPE_CODE_VOID;      break;
  case Type::HalfTyID:      Code = bitc::TYPE_CODE_HALF;      break;
  case Type::FloatTyID:     Code = bitc::TYPE_CODE_FLOAT;     break;
  case Type::DoubleTyID:    Code = bitc::TYPE_CODE_DOUBLE;    break;
  case Type::X86_FP80TyID:  Code = bitc::TYPE_CODE_X86_FP80;  break;
  case Type::FP128TyID:     Code = bitc::TYPE_CODE_FP128;     break;
  case Type::PPC_FP128TyID: Code = bitc::TYPE_CODE_PPC_FP128; break;
  case Type::LabelTyID:     Code = bitc::TYPE_CODE_LABEL;     break;
  case Type::MetadataTyID:  Code = bitc::TYPE_CODE_METADATA;  break;
  case Type::X86_MMXTyID:   Code = bitc::TYPE_CODE_X86_MMX;   break;
  case Type::TokenTyID:     Code = bitc::TYPE_CODE_TOKEN;     break;
  case Type::IntegerTyID:
    // INTEGER: [width]
    Code = bitc::TYPE_CODE_INTEGER;
    TypeVals.push_back(cast<IntegerType>(T)->getBitWidth());
    break;
  case Type::PointerTyID: {
    PointerType *PTy = cast<PointerType>(T);
    // POINTER: [pointee type, address space]
    Code = bitc::TYPE_CODE_POINTER;
    TypeVals.push_back(VE.getTypeID(PTy->getElementType()));
    unsigned AddressSpace = PTy->getAddressSpace();
    TypeVals.push_back(AddressSpace);
    if (AddressSpace == 0) AbbrevToUse = PtrAbbrev;
    break;
  }
  case Type::FunctionTyID: {
    FunctionType *FT = cast<FunctionType>(T);
    // FUNCTION: [isvararg, retty, paramty x N]
    Code = bitc::TYPE_CODE_FUNCTION;
    TypeVals.push_back(FT->isVarArg());
    TypeVals.push_back(VE.getTypeID(FT->getReturnType()));
    for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i)
      TypeVals.push_back(VE.getTypeID(FT->getParamType(i)));
    AbbrevToUse = FunctionAbbrev;
    break;
  }
  case Type::StructTyID: {
    StructType *ST = cast<StructType>(T);
    // STRUCT: [ispacked, eltty x N]
    TypeVals.push_back(ST->isPacked());
    // Output all of the element types.
    for (StructType::element_iterator I = ST->element_begin(),
         E = ST->element_end(); I != E; ++I)
      TypeVals.push_back(VE.getTypeID(*I));

    if (ST->isLiteral()) {
      Code = bitc::TYPE_CODE_STRUCT_ANON;
      AbbrevToUse = StructAnonAbbrev;
    } else {
      if (ST->isOpaque()) {
        Code = bitc::TYPE_CODE_OPAQUE;
      } else {
        Code = bitc::TYPE_CODE_STRUCT_NAMED;
        AbbrevToUse = StructNamedAbbrev;
      }

      // Emit the name if it is present.
      if (!ST->getName().empty())
        writeStringRecord(Stream, bitc::TYPE_CODE_STRUCT_NAME, ST->getName(),
                          StructNameAbbrev);
    }
    break;
  }
  case Type::ArrayTyID: {
    ArrayType *AT = cast<ArrayType>(T);
    // ARRAY: [numelts, eltty]
    Code = bitc::TYPE_CODE_ARRAY;
    TypeVals.push_back(AT->getNumElements());
    TypeVals.push_back(VE.getTypeID(AT->getElementType()));
    AbbrevToUse = ArrayAbbrev;
    break;
  }
  case Type::VectorTyID: {
    VectorType *VT = cast<VectorType>(T);
    // VECTOR [numelts, eltty]
    Code = bitc::TYPE_CODE_VECTOR;
    TypeVals.push_back(VT->getNumElements());
    TypeVals.push_back(VE.getTypeID(VT->getElementType()));
    break;
  }
  }

  // Emit the finished record.
  Stream.EmitRecord(Code, TypeVals, AbbrevToUse);
  TypeVals.clear();
}

Stream.ExitBlock();
920}

922static unsigned getEncodedLinkage(const GlobalValue::LinkageTypes Linkage) {
switch (Linkage) {
case GlobalValue::ExternalLinkage:
  return 0;
case GlobalValue::WeakAnyLinkage:
  return 16;
case GlobalValue::AppendingLinkage:
  return 2;
case GlobalValue::InternalLinkage:
  return 3;
case GlobalValue::LinkOnceAnyLinkage:
  return 18;
case GlobalValue::ExternalWeakLinkage:
  return 7;
case GlobalValue::CommonLinkage:
  return 8;
case GlobalValue::PrivateLinkage:
  return 9;
case GlobalValue::WeakODRLinkage:
  return 17;
case GlobalValue::LinkOnceODRLinkage:
  return 19;
case GlobalValue::AvailableExternallyLinkage:
  return 12;
}
llvm_unreachable("Invalid linkage")::llvm::llvm_unreachable_internal("Invalid linkage", "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 947);
948}

950static unsigned getEncodedLinkage(const GlobalValue &GV) {
return getEncodedLinkage(GV.getLinkage());
952}

954static uint64_t getEncodedFFlags(FunctionSummary::FFlags Flags) {
uint64_t RawFlags = 0;
RawFlags |= Flags.ReadNone;
RawFlags |= (Flags.ReadOnly << 1);
RawFlags |= (Flags.NoRecurse << 2);
RawFlags |= (Flags.ReturnDoesNotAlias << 3);
return RawFlags;
961}

963// Decode the flags for GlobalValue in the summary
964static uint64_t getEncodedGVSummaryFlags(GlobalValueSummary::GVFlags Flags) {
uint64_t RawFlags = 0;

RawFlags |= Flags.NotEligibleToImport; // bool
RawFlags |= (Flags.Live << 1);
RawFlags |= (Flags.DSOLocal << 2);

// Linkage don't need to be remapped at that time for the summary. Any future
// change to the getEncodedLinkage() function will need to be taken into
// account here as well.
RawFlags = (RawFlags << 4) | Flags.Linkage; // 4 bits

return RawFlags;
977}

979static unsigned getEncodedVisibility(const GlobalValue &GV) {
switch (GV.getVisibility()) {
case GlobalValue::DefaultVisibility:   return 0;
case GlobalValue::HiddenVisibility:    return 1;
case GlobalValue::ProtectedVisibility: return 2;
}
llvm_unreachable("Invalid visibility")::llvm::llvm_unreachable_internal("Invalid visibility", "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 985);
986}

988static unsigned getEncodedDLLStorageClass(const GlobalValue &GV) {
switch (GV.getDLLStorageClass()) {
case GlobalValue::DefaultStorageClass:   return 0;
case GlobalValue::DLLImportStorageClass: return 1;
case GlobalValue::DLLExportStorageClass: return 2;
}
llvm_unreachable("Invalid DLL storage class")::llvm::llvm_unreachable_internal("Invalid DLL storage class"
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 994);
995}

997static unsigned getEncodedThreadLocalMode(const GlobalValue &GV) {
switch (GV.getThreadLocalMode()) {
  case GlobalVariable::NotThreadLocal:         return 0;
  case GlobalVariable::GeneralDynamicTLSModel: return 1;
  case GlobalVariable::LocalDynamicTLSModel:   return 2;
  case GlobalVariable::InitialExecTLSModel:    return 3;
  case GlobalVariable::LocalExecTLSModel:      return 4;
}
llvm_unreachable("Invalid TLS model")::llvm::llvm_unreachable_internal("Invalid TLS model", "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 1005);
1006}

1008static unsigned getEncodedComdatSelectionKind(const Comdat &C) {
switch (C.getSelectionKind()) {
case Comdat::Any:
  return bitc::COMDAT_SELECTION_KIND_ANY;
case Comdat::ExactMatch:
  return bitc::COMDAT_SELECTION_KIND_EXACT_MATCH;
case Comdat::Largest:
  return bitc::COMDAT_SELECTION_KIND_LARGEST;
case Comdat::NoDuplicates:
  return bitc::COMDAT_SELECTION_KIND_NO_DUPLICATES;
case Comdat::SameSize:
  return bitc::COMDAT_SELECTION_KIND_SAME_SIZE;
}
llvm_unreachable("Invalid selection kind")::llvm::llvm_unreachable_internal("Invalid selection kind", "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 1021);
1022}

1024static unsigned getEncodedUnnamedAddr(const GlobalValue &GV) {
switch (GV.getUnnamedAddr()) {
case GlobalValue::UnnamedAddr::None:   return 0;
case GlobalValue::UnnamedAddr::Local:  return 2;
case GlobalValue::UnnamedAddr::Global: return 1;
}
llvm_unreachable("Invalid unnamed_addr")::llvm::llvm_unreachable_internal("Invalid unnamed_addr", "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 1030);
1031}

1033size_t ModuleBitcodeWriter::addToStrtab(StringRef Str) {
if (GenerateHash)
  Hasher.update(Str);
return StrtabBuilder.add(Str);
1037}

1039void ModuleBitcodeWriter::writeComdats() {
SmallVector<unsigned, 64> Vals;
for (const Comdat *C : VE.getComdats()) {
  // COMDAT: [strtab offset, strtab size, selection_kind]
  Vals.push_back(addToStrtab(C->getName()));
  Vals.push_back(C->getName().size());
  Vals.push_back(getEncodedComdatSelectionKind(*C));
  Stream.EmitRecord(bitc::MODULE_CODE_COMDAT, Vals, /*AbbrevToUse=*/0);
  Vals.clear();
}
1049}

1051/// Write a record that will eventually hold the word offset of the
1052/// module-level VST. For now the offset is 0, which will be backpatched
1053/// after the real VST is written. Saves the bit offset to backpatch.
1054void ModuleBitcodeWriter::writeValueSymbolTableForwardDecl() {
// Write a placeholder value in for the offset of the real VST,
// which is written after the function blocks so that it can include
// the offset of each function. The placeholder offset will be
// updated when the real VST is written.
auto Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(bitc::MODULE_CODE_VSTOFFSET));
// Blocks are 32-bit aligned, so we can use a 32-bit word offset to
// hold the real VST offset. Must use fixed instead of VBR as we don't
// know how many VBR chunks to reserve ahead of time.
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
unsigned VSTOffsetAbbrev = Stream.EmitAbbrev(std::move(Abbv));

// Emit the placeholder
uint64_t Vals[] = {bitc::MODULE_CODE_VSTOFFSET, 0};
Stream.EmitRecordWithAbbrev(VSTOffsetAbbrev, Vals);

// Compute and save the bit offset to the placeholder, which will be
// patched when the real VST is written. We can simply subtract the 32-bit
// fixed size from the current bit number to get the location to backpatch.
VSTOffsetPlaceholder = Stream.GetCurrentBitNo() - 32;
1075}

1077enum StringEncoding { SE_Char6, SE_Fixed7, SE_Fixed8 };

1079/// Determine the encoding to use for the given string name and length.
1080static StringEncoding getStringEncoding(StringRef Str) {
bool isChar6 = true;
for (char C : Str) {
  if (isChar6)
    isChar6 = BitCodeAbbrevOp::isChar6(C);
  if ((unsigned char)C & 128)
    // don't bother scanning the rest.
    return SE_Fixed8;
}
if (isChar6)
  return SE_Char6;
return SE_Fixed7;
1092}

1094/// Emit top-level description of module, including target triple, inline asm,
1095/// descriptors for global variables, and function prototype info.
1096/// Returns the bit offset to backpatch with the location of the real VST.
1097void ModuleBitcodeWriter::writeModuleInfo() {
// Emit various pieces of data attached to a module.
if (!M.getTargetTriple().empty())
  writeStringRecord(Stream, bitc::MODULE_CODE_TRIPLE, M.getTargetTriple(),
                    0 /*TODO*/);
const std::string &DL = M.getDataLayoutStr();
if (!DL.empty())
  writeStringRecord(Stream, bitc::MODULE_CODE_DATALAYOUT, DL, 0 /*TODO*/);
if (!M.getModuleInlineAsm().empty())
  writeStringRecord(Stream, bitc::MODULE_CODE_ASM, M.getModuleInlineAsm(),
                    0 /*TODO*/);

// Emit information about sections and GC, computing how many there are. Also
// compute the maximum alignment value.
std::map<std::string, unsigned> SectionMap;
std::map<std::string, unsigned> GCMap;
unsigned MaxAlignment = 0;
unsigned MaxGlobalType = 0;
for (const GlobalValue &GV : M.globals()) {
  MaxAlignment = std::max(MaxAlignment, GV.getAlignment());
  MaxGlobalType = std::max(MaxGlobalType, VE.getTypeID(GV.getValueType()));
  if (GV.hasSection()) {
    // Give section names unique ID's.
    unsigned &Entry = SectionMap[GV.getSection()];
    if (!Entry) {
      writeStringRecord(Stream, bitc::MODULE_CODE_SECTIONNAME, GV.getSection(),
                        0 /*TODO*/);
      Entry = SectionMap.size();
    }
  }
}
for (const Function &F : M) {
  MaxAlignment = std::max(MaxAlignment, F.getAlignment());
  if (F.hasSection()) {
    // Give section names unique ID's.
    unsigned &Entry = SectionMap[F.getSection()];
    if (!Entry) {
      writeStringRecord(Stream, bitc::MODULE_CODE_SECTIONNAME, F.getSection(),
                        0 /*TODO*/);
      Entry = SectionMap.size();
    }
  }
  if (F.hasGC()) {
    // Same for GC names.
    unsigned &Entry = GCMap[F.getGC()];
    if (!Entry) {
      writeStringRecord(Stream, bitc::MODULE_CODE_GCNAME, F.getGC(),
                        0 /*TODO*/);
      Entry = GCMap.size();
    }
  }
}

// Emit abbrev for globals, now that we know # sections and max alignment.
unsigned SimpleGVarAbbrev = 0;
if (!M.global_empty()) {
  // Add an abbrev for common globals with no visibility or thread localness.
  auto Abbv = std::make_shared<BitCodeAbbrev>();
  Abbv->Add(BitCodeAbbrevOp(bitc::MODULE_CODE_GLOBALVAR));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
                            Log2_32_Ceil(MaxGlobalType+1)));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // AddrSpace << 2
                                                         //| explicitType << 1
                                                         //| constant
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // Initializer.
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 5)); // Linkage.
  if (MaxAlignment == 0)                                 // Alignment.
    Abbv->Add(BitCodeAbbrevOp(0));
  else {
    unsigned MaxEncAlignment = Log2_32(MaxAlignment)+1;
    Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
                             Log2_32_Ceil(MaxEncAlignment+1)));
  }
  if (SectionMap.empty())                                    // Section.
    Abbv->Add(BitCodeAbbrevOp(0));
  else
    Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
                             Log2_32_Ceil(SectionMap.size()+1)));
  // Don't bother emitting vis + thread local.
  SimpleGVarAbbrev = Stream.EmitAbbrev(std::move(Abbv));
}

SmallVector<unsigned, 64> Vals;
// Emit the module's source file name.
{
  StringEncoding Bits = getStringEncoding(M.getSourceFileName());
  BitCodeAbbrevOp AbbrevOpToUse = BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8);
  if (Bits == SE_Char6)
    AbbrevOpToUse = BitCodeAbbrevOp(BitCodeAbbrevOp::Char6);
  else if (Bits == SE_Fixed7)
    AbbrevOpToUse = BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7);

  // MODULE_CODE_SOURCE_FILENAME: [namechar x N]
  auto Abbv = std::make_shared<BitCodeAbbrev>();
  Abbv->Add(BitCodeAbbrevOp(bitc::MODULE_CODE_SOURCE_FILENAME));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
  Abbv->Add(AbbrevOpToUse);
  unsigned FilenameAbbrev = Stream.EmitAbbrev(std::move(Abbv));

  for (const auto P : M.getSourceFileName())
    Vals.push_back((unsigned char)P);

  // Emit the finished record.
  Stream.EmitRecord(bitc::MODULE_CODE_SOURCE_FILENAME, Vals, FilenameAbbrev);
  Vals.clear();
}

// Emit the global variable information.
for (const GlobalVariable &GV : M.globals()) {
  unsigned AbbrevToUse = 0;

  // GLOBALVAR: [strtab offset, strtab size, type, isconst, initid,
  //             linkage, alignment, section, visibility, threadlocal,
  //             unnamed_addr, externally_initialized, dllstorageclass,
  //             comdat, attributes, DSO_Local]
  Vals.push_back(addToStrtab(GV.getName()));
  Vals.push_back(GV.getName().size());
  Vals.push_back(VE.getTypeID(GV.getValueType()));
  Vals.push_back(GV.getType()->getAddressSpace() << 2 | 2 | GV.isConstant());
  Vals.push_back(GV.isDeclaration() ? 0 :
                 (VE.getValueID(GV.getInitializer()) + 1));
  Vals.push_back(getEncodedLinkage(GV));
  Vals.push_back(Log2_32(GV.getAlignment())+1);
  Vals.push_back(GV.hasSection() ? SectionMap[GV.getSection()] : 0);
  if (GV.isThreadLocal() ||
      GV.getVisibility() != GlobalValue::DefaultVisibility ||
      GV.getUnnamedAddr() != GlobalValue::UnnamedAddr::None ||
      GV.isExternallyInitialized() ||
      GV.getDLLStorageClass() != GlobalValue::DefaultStorageClass ||
      GV.hasComdat() ||
      GV.hasAttributes() ||
      GV.isDSOLocal()) {
    Vals.push_back(getEncodedVisibility(GV));
    Vals.push_back(getEncodedThreadLocalMode(GV));
    Vals.push_back(getEncodedUnnamedAddr(GV));
    Vals.push_back(GV.isExternallyInitialized());
    Vals.push_back(getEncodedDLLStorageClass(GV));
    Vals.push_back(GV.hasComdat() ? VE.getComdatID(GV.getComdat()) : 0);

    auto AL = GV.getAttributesAsList(AttributeList::FunctionIndex);
    Vals.push_back(VE.getAttributeListID(AL));

    Vals.push_back(GV.isDSOLocal());
  } else {
    AbbrevToUse = SimpleGVarAbbrev;
  }

  Stream.EmitRecord(bitc::MODULE_CODE_GLOBALVAR, Vals, AbbrevToUse);
  Vals.clear();
}

// Emit the function proto information.
for (const Function &F : M) {
  // FUNCTION:  [strtab offset, strtab size, type, callingconv, isproto,
  //             linkage, paramattrs, alignment, section, visibility, gc,
  //             unnamed_addr, prologuedata, dllstorageclass, comdat,
  //             prefixdata, personalityfn, DSO_Local]
  Vals.push_back(addToStrtab(F.getName()));
  Vals.push_back(F.getName().size());
  Vals.push_back(VE.getTypeID(F.getFunctionType()));
  Vals.push_back(F.getCallingConv());
  Vals.push_back(F.isDeclaration());
  Vals.push_back(getEncodedLinkage(F));
  Vals.push_back(VE.getAttributeListID(F.getAttributes()));
  Vals.push_back(Log2_32(F.getAlignment())+1);
  Vals.push_back(F.hasSection() ? SectionMap[F.getSection()] : 0);
  Vals.push_back(getEncodedVisibility(F));
  Vals.push_back(F.hasGC() ? GCMap[F.getGC()] : 0);
  Vals.push_back(getEncodedUnnamedAddr(F));
  Vals.push_back(F.hasPrologueData() ? (VE.getValueID(F.getPrologueData()) + 1)
                                     : 0);
  Vals.push_back(getEncodedDLLStorageClass(F));
  Vals.push_back(F.hasComdat() ? VE.getComdatID(F.getComdat()) : 0);
  Vals.push_back(F.hasPrefixData() ? (VE.getValueID(F.getPrefixData()) + 1)
                                   : 0);
  Vals.push_back(
      F.hasPersonalityFn() ? (VE.getValueID(F.getPersonalityFn()) + 1) : 0);

  Vals.push_back(F.isDSOLocal());
  unsigned AbbrevToUse = 0;
  Stream.EmitRecord(bitc::MODULE_CODE_FUNCTION, Vals, AbbrevToUse);
  Vals.clear();
}

// Emit the alias information.
for (const GlobalAlias &A : M.aliases()) {
  // ALIAS: [strtab offset, strtab size, alias type, aliasee val#, linkage,
  //         visibility, dllstorageclass, threadlocal, unnamed_addr,
  //         DSO_Local]
  Vals.push_back(addToStrtab(A.getName()));
  Vals.push_back(A.getName().size());
  Vals.push_back(VE.getTypeID(A.getValueType()));
  Vals.push_back(A.getType()->getAddressSpace());
  Vals.push_back(VE.getValueID(A.getAliasee()));
  Vals.push_back(getEncodedLinkage(A));
  Vals.push_back(getEncodedVisibility(A));
  Vals.push_back(getEncodedDLLStorageClass(A));
  Vals.push_back(getEncodedThreadLocalMode(A));
  Vals.push_back(getEncodedUnnamedAddr(A));
  Vals.push_back(A.isDSOLocal());

  unsigned AbbrevToUse = 0;
  Stream.EmitRecord(bitc::MODULE_CODE_ALIAS, Vals, AbbrevToUse);
  Vals.clear();
}

// Emit the ifunc information.
for (const GlobalIFunc &I : M.ifuncs()) {
  // IFUNC: [strtab offset, strtab size, ifunc type, address space, resolver
  //         val#, linkage, visibility, DSO_Local]
  Vals.push_back(addToStrtab(I.getName()));
  Vals.push_back(I.getName().size());
  Vals.push_back(VE.getTypeID(I.getValueType()));
  Vals.push_back(I.getType()->getAddressSpace());
  Vals.push_back(VE.getValueID(I.getResolver()));
  Vals.push_back(getEncodedLinkage(I));
  Vals.push_back(getEncodedVisibility(I));
  Vals.push_back(I.isDSOLocal());
  Stream.EmitRecord(bitc::MODULE_CODE_IFUNC, Vals);
  Vals.clear();
}

writeValueSymbolTableForwardDecl();
1322}

1324static uint64_t getOptimizationFlags(const Value *V) {
uint64_t Flags = 0;

if (const auto *OBO = dyn_cast<OverflowingBinaryOperator>(V)) {
  if (OBO->hasNoSignedWrap())
    Flags |= 1 << bitc::OBO_NO_SIGNED_WRAP;
  if (OBO->hasNoUnsignedWrap())
    Flags |= 1 << bitc::OBO_NO_UNSIGNED_WRAP;
} else if (const auto *PEO = dyn_cast<PossiblyExactOperator>(V)) {
  if (PEO->isExact())
    Flags |= 1 << bitc::PEO_EXACT;
} else if (const auto *FPMO = dyn_cast<FPMathOperator>(V)) {
  if (FPMO->hasAllowReassoc())
    Flags |= bitc::AllowReassoc;
  if (FPMO->hasNoNaNs())
    Flags |= bitc::NoNaNs;
  if (FPMO->hasNoInfs())
    Flags |= bitc::NoInfs;
  if (FPMO->hasNoSignedZeros())
    Flags |= bitc::NoSignedZeros;
  if (FPMO->hasAllowReciprocal())
    Flags |= bitc::AllowReciprocal;
  if (FPMO->hasAllowContract())
    Flags |= bitc::AllowContract;
  if (FPMO->hasApproxFunc())
    Flags |= bitc::ApproxFunc;
}

return Flags;
1353}

1355void ModuleBitcodeWriter::writeValueAsMetadata(
  const ValueAsMetadata *MD, SmallVectorImpl<uint64_t> &Record) {
// Mimic an MDNode with a value as one operand.
Value *V = MD->getValue();
Record.push_back(VE.getTypeID(V->getType()));
Record.push_back(VE.getValueID(V));
Stream.EmitRecord(bitc::METADATA_VALUE, Record, 0);
Record.clear();
1363}

1365void ModuleBitcodeWriter::writeMDTuple(const MDTuple *N,
                                     SmallVectorImpl<uint64_t> &Record,
                                     unsigned Abbrev) {
for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
  Metadata *MD = N->getOperand(i);
  assert(!(MD && isa<LocalAsMetadata>(MD)) &&(static_cast <bool> (!(MD && isa<LocalAsMetadata
>(MD)) && "Unexpected function-local metadata") ? void
 (0) : __assert_fail ("!(MD && isa<LocalAsMetadata>(MD)) && \"Unexpected function-local metadata\""
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 1371, __extension__ __PRETTY_FUNCTION__))
         "Unexpected function-local metadata")(static_cast <bool> (!(MD && isa<LocalAsMetadata
>(MD)) && "Unexpected function-local metadata") ? void
 (0) : __assert_fail ("!(MD && isa<LocalAsMetadata>(MD)) && \"Unexpected function-local metadata\""
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 1371, __extension__ __PRETTY_FUNCTION__));
  Record.push_back(VE.getMetadataOrNullID(MD));
}
Stream.EmitRecord(N->isDistinct() ? bitc::METADATA_DISTINCT_NODE
                                  : bitc::METADATA_NODE,
                  Record, Abbrev);
Record.clear();
1378}

1380unsigned ModuleBitcodeWriter::createDILocationAbbrev() {
// Assume the column is usually under 128, and always output the inlined-at
// location (it's never more expensive than building an array size 1).
auto Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_LOCATION));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
return Stream.EmitAbbrev(std::move(Abbv));
1391}

1393void ModuleBitcodeWriter::writeDILocation(const DILocation *N,
                                        SmallVectorImpl<uint64_t> &Record,
                                        unsigned &Abbrev) {
if (!Abbrev)
  Abbrev = createDILocationAbbrev();

Record.push_back(N->isDistinct());
Record.push_back(N->getLine());
Record.push_back(N->getColumn());
Record.push_back(VE.getMetadataID(N->getScope()));
Record.push_back(VE.getMetadataOrNullID(N->getInlinedAt()));

Stream.EmitRecord(bitc::METADATA_LOCATION, Record, Abbrev);
Record.clear();
1407}

1409unsigned ModuleBitcodeWriter::createGenericDINodeAbbrev() {
// Assume the column is usually under 128, and always output the inlined-at
// location (it's never more expensive than building an array size 1).
auto Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_GENERIC_DEBUG));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
return Stream.EmitAbbrev(std::move(Abbv));
1421}

1423void ModuleBitcodeWriter::writeGenericDINode(const GenericDINode *N,
                                           SmallVectorImpl<uint64_t> &Record,
                                           unsigned &Abbrev) {
if (!Abbrev)
  Abbrev = createGenericDINodeAbbrev();

Record.push_back(N->isDistinct());
Record.push_back(N->getTag());
Record.push_back(0); // Per-tag version field; unused for now.

for (auto &I : N->operands())
  Record.push_back(VE.getMetadataOrNullID(I));

Stream.EmitRecord(bitc::METADATA_GENERIC_DEBUG, Record, Abbrev);
Record.clear();
1438}

1440static uint64_t rotateSign(int64_t I) {
uint64_t U = I;
return I < 0 ? ~(U << 1) : U << 1;
1443}

1445void ModuleBitcodeWriter::writeDISubrange(const DISubrange *N,
                                        SmallVectorImpl<uint64_t> &Record,
                                        unsigned Abbrev) {
const uint64_t Version = 1 << 1;
Record.push_back((uint64_t)N->isDistinct() | Version);
Record.push_back(VE.getMetadataOrNullID(N->getRawCountNode()));
Record.push_back(rotateSign(N->getLowerBound()));

Stream.EmitRecord(bitc::METADATA_SUBRANGE, Record, Abbrev);
Record.clear();
1455}

1457void ModuleBitcodeWriter::writeDIEnumerator(const DIEnumerator *N,
                                          SmallVectorImpl<uint64_t> &Record,
                                          unsigned Abbrev) {
Record.push_back((N->isUnsigned() << 1) | N->isDistinct());
Record.push_back(rotateSign(N->getValue()));
Record.push_back(VE.getMetadataOrNullID(N->getRawName()));

Stream.EmitRecord(bitc::METADATA_ENUMERATOR, Record, Abbrev);
Record.clear();
1466}

1468void ModuleBitcodeWriter::writeDIBasicType(const DIBasicType *N,
                                         SmallVectorImpl<uint64_t> &Record,
                                         unsigned Abbrev) {
Record.push_back(N->isDistinct());
Record.push_back(N->getTag());
Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
Record.push_back(N->getSizeInBits());
Record.push_back(N->getAlignInBits());
Record.push_back(N->getEncoding());

Stream.EmitRecord(bitc::METADATA_BASIC_TYPE, Record, Abbrev);
Record.clear();
1480}

1482void ModuleBitcodeWriter::writeDIDerivedType(const DIDerivedType *N,
                                           SmallVectorImpl<uint64_t> &Record,
                                           unsigned Abbrev) {
Record.push_back(N->isDistinct());
Record.push_back(N->getTag());
Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
Record.push_back(VE.getMetadataOrNullID(N->getFile()));
Record.push_back(N->getLine());
Record.push_back(VE.getMetadataOrNullID(N->getScope()));
Record.push_back(VE.getMetadataOrNullID(N->getBaseType()));
Record.push_back(N->getSizeInBits());
Record.push_back(N->getAlignInBits());
Record.push_back(N->getOffsetInBits());
Record.push_back(N->getFlags());
Record.push_back(VE.getMetadataOrNullID(N->getExtraData()));

// DWARF address space is encoded as N->getDWARFAddressSpace() + 1. 0 means
// that there is no DWARF address space associated with DIDerivedType.
if (const auto &DWARFAddressSpace = N->getDWARFAddressSpace())
  Record.push_back(*DWARFAddressSpace + 1);
else
  Record.push_back(0);

Stream.EmitRecord(bitc::METADATA_DERIVED_TYPE, Record, Abbrev);
Record.clear();
1507}

1509void ModuleBitcodeWriter::writeDICompositeType(
  const DICompositeType *N, SmallVectorImpl<uint64_t> &Record,
  unsigned Abbrev) {
const unsigned IsNotUsedInOldTypeRef = 0x2;
Record.push_back(IsNotUsedInOldTypeRef | (unsigned)N->isDistinct());
Record.push_back(N->getTag());
Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
Record.push_back(VE.getMetadataOrNullID(N->getFile()));
Record.push_back(N->getLine());
Record.push_back(VE.getMetadataOrNullID(N->getScope()));
Record.push_back(VE.getMetadataOrNullID(N->getBaseType()));
Record.push_back(N->getSizeInBits());
Record.push_back(N->getAlignInBits());
Record.push_back(N->getOffsetInBits());
Record.push_back(N->getFlags());
Record.push_back(VE.getMetadataOrNullID(N->getElements().get()));
Record.push_back(N->getRuntimeLang());
Record.push_back(VE.getMetadataOrNullID(N->getVTableHolder()));
Record.push_back(VE.getMetadataOrNullID(N->getTemplateParams().get()));
Record.push_back(VE.getMetadataOrNullID(N->getRawIdentifier()));
Record.push_back(VE.getMetadataOrNullID(N->getDiscriminator()));

Stream.EmitRecord(bitc::METADATA_COMPOSITE_TYPE, Record, Abbrev);
Record.clear();
1533}

1535void ModuleBitcodeWriter::writeDISubroutineType(
  const DISubroutineType *N, SmallVectorImpl<uint64_t> &Record,
  unsigned Abbrev) {
const unsigned HasNoOldTypeRefs = 0x2;
Record.push_back(HasNoOldTypeRefs | (unsigned)N->isDistinct());
Record.push_back(N->getFlags());
Record.push_back(VE.getMetadataOrNullID(N->getTypeArray().get()));
Record.push_back(N->getCC());

Stream.EmitRecord(bitc::METADATA_SUBROUTINE_TYPE, Record, Abbrev);
Record.clear();
1546}

1548void ModuleBitcodeWriter::writeDIFile(const DIFile *N,
                                    SmallVectorImpl<uint64_t> &Record,
                                    unsigned Abbrev) {
Record.push_back(N->isDistinct());
Record.push_back(VE.getMetadataOrNullID(N->getRawFilename()));
Record.push_back(VE.getMetadataOrNullID(N->getRawDirectory()));
if (N->getRawChecksum()) {
  Record.push_back(N->getRawChecksum()->Kind);
  Record.push_back(VE.getMetadataOrNullID(N->getRawChecksum()->Value));
} else {
  // Maintain backwards compatibility with the old internal representation of
  // CSK_None in ChecksumKind by writing nulls here when Checksum is None.
  Record.push_back(0);
  Record.push_back(VE.getMetadataOrNullID(nullptr));
}
auto Source = N->getRawSource();
if (Source)
  Record.push_back(VE.getMetadataOrNullID(*Source));

Stream.EmitRecord(bitc::METADATA_FILE, Record, Abbrev);
Record.clear();
1569}

1571void ModuleBitcodeWriter::writeDICompileUnit(const DICompileUnit *N,
                                           SmallVectorImpl<uint64_t> &Record,
                                           unsigned Abbrev) {
assert(N->isDistinct() && "Expected distinct compile units")(static_cast <bool> (N->isDistinct() && "Expected distinct compile units"
) ? void (0) : __assert_fail ("N->isDistinct() && \"Expected distinct compile units\""
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 1574, __extension__ __PRETTY_FUNCTION__));
Record.push_back(/* IsDistinct */ true);
Record.push_back(N->getSourceLanguage());
Record.push_back(VE.getMetadataOrNullID(N->getFile()));
Record.push_back(VE.getMetadataOrNullID(N->getRawProducer()));
Record.push_back(N->isOptimized());
Record.push_back(VE.getMetadataOrNullID(N->getRawFlags()));
Record.push_back(N->getRuntimeVersion());
Record.push_back(VE.getMetadataOrNullID(N->getRawSplitDebugFilename()));
Record.push_back(N->getEmissionKind());
Record.push_back(VE.getMetadataOrNullID(N->getEnumTypes().get()));
Record.push_back(VE.getMetadataOrNullID(N->getRetainedTypes().get()));
Record.push_back(/* subprograms */ 0);
Record.push_back(VE.getMetadataOrNullID(N->getGlobalVariables().get()));
Record.push_back(VE.getMetadataOrNullID(N->getImportedEntities().get()));
Record.push_back(N->getDWOId());
Record.push_back(VE.getMetadataOrNullID(N->getMacros().get()));
Record.push_back(N->getSplitDebugInlining());
Record.push_back(N->getDebugInfoForProfiling());
Record.push_back(N->getGnuPubnames());

Stream.EmitRecord(bitc::METADATA_COMPILE_UNIT, Record, Abbrev);
Record.clear();
1597}

1599void ModuleBitcodeWriter::writeDISubprogram(const DISubprogram *N,
                                          SmallVectorImpl<uint64_t> &Record,
                                          unsigned Abbrev) {
uint64_t HasUnitFlag = 1 << 1;
Record.push_back(N->isDistinct() | HasUnitFlag);
Record.push_back(VE.getMetadataOrNullID(N->getScope()));
Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
Record.push_back(VE.getMetadataOrNullID(N->getRawLinkageName()));
Record.push_back(VE.getMetadataOrNullID(N->getFile()));
Record.push_back(N->getLine());
Record.push_back(VE.getMetadataOrNullID(N->getType()));
Record.push_back(N->isLocalToUnit());
Record.push_back(N->isDefinition());
Record.push_back(N->getScopeLine());
Record.push_back(VE.getMetadataOrNullID(N->getContainingType()));
Record.push_back(N->getVirtuality());
Record.push_back(N->getVirtualIndex());
Record.push_back(N->getFlags());
Record.push_back(N->isOptimized());
Record.push_back(VE.getMetadataOrNullID(N->getRawUnit()));
Record.push_back(VE.getMetadataOrNullID(N->getTemplateParams().get()));
Record.push_back(VE.getMetadataOrNullID(N->getDeclaration()));
Record.push_back(VE.getMetadataOrNullID(N->getVariables().get()));
Record.push_back(N->getThisAdjustment());
Record.push_back(VE.getMetadataOrNullID(N->getThrownTypes().get()));

Stream.EmitRecord(bitc::METADATA_SUBPROGRAM, Record, Abbrev);
Record.clear();
1627}

1629void ModuleBitcodeWriter::writeDILexicalBlock(const DILexicalBlock *N,
                                            SmallVectorImpl<uint64_t> &Record,
                                            unsigned Abbrev) {
Record.push_back(N->isDistinct());
Record.push_back(VE.getMetadataOrNullID(N->getScope()));
Record.push_back(VE.getMetadataOrNullID(N->getFile()));
Record.push_back(N->getLine());
Record.push_back(N->getColumn());

Stream.EmitRecord(bitc::METADATA_LEXICAL_BLOCK, Record, Abbrev);
Record.clear();
1640}

1642void ModuleBitcodeWriter::writeDILexicalBlockFile(
  const DILexicalBlockFile *N, SmallVectorImpl<uint64_t> &Record,
  unsigned Abbrev) {
Record.push_back(N->isDistinct());
Record.push_back(VE.getMetadataOrNullID(N->getScope()));
Record.push_back(VE.getMetadataOrNullID(N->getFile()));
Record.push_back(N->getDiscriminator());

Stream.EmitRecord(bitc::METADATA_LEXICAL_BLOCK_FILE, Record, Abbrev);
Record.clear();
1652}

1654void ModuleBitcodeWriter::writeDINamespace(const DINamespace *N,
                                         SmallVectorImpl<uint64_t> &Record,
                                         unsigned Abbrev) {
Record.push_back(N->isDistinct() | N->getExportSymbols() << 1);
Record.push_back(VE.getMetadataOrNullID(N->getScope()));
Record.push_back(VE.getMetadataOrNullID(N->getRawName()));

Stream.EmitRecord(bitc::METADATA_NAMESPACE, Record, Abbrev);
Record.clear();
1663}

1665void ModuleBitcodeWriter::writeDIMacro(const DIMacro *N,
                                     SmallVectorImpl<uint64_t> &Record,
                                     unsigned Abbrev) {
Record.push_back(N->isDistinct());
Record.push_back(N->getMacinfoType());
Record.push_back(N->getLine());
Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
Record.push_back(VE.getMetadataOrNullID(N->getRawValue()));

Stream.EmitRecord(bitc::METADATA_MACRO, Record, Abbrev);
Record.clear();
1676}

1678void ModuleBitcodeWriter::writeDIMacroFile(const DIMacroFile *N,
                                         SmallVectorImpl<uint64_t> &Record,
                                         unsigned Abbrev) {
Record.push_back(N->isDistinct());
Record.push_back(N->getMacinfoType());
Record.push_back(N->getLine());
Record.push_back(VE.getMetadataOrNullID(N->getFile()));
Record.push_back(VE.getMetadataOrNullID(N->getElements().get()));

Stream.EmitRecord(bitc::METADATA_MACRO_FILE, Record, Abbrev);
Record.clear();
1689}

1691void ModuleBitcodeWriter::writeDIModule(const DIModule *N,
                                      SmallVectorImpl<uint64_t> &Record,
                                      unsigned Abbrev) {
Record.push_back(N->isDistinct());
for (auto &I : N->operands())
  Record.push_back(VE.getMetadataOrNullID(I));

Stream.EmitRecord(bitc::METADATA_MODULE, Record, Abbrev);
Record.clear();
1700}

1702void ModuleBitcodeWriter::writeDITemplateTypeParameter(
  const DITemplateTypeParameter *N, SmallVectorImpl<uint64_t> &Record,
  unsigned Abbrev) {
Record.push_back(N->isDistinct());
Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
Record.push_back(VE.getMetadataOrNullID(N->getType()));

Stream.EmitRecord(bitc::METADATA_TEMPLATE_TYPE, Record, Abbrev);
Record.clear();
1711}

1713void ModuleBitcodeWriter::writeDITemplateValueParameter(
  const DITemplateValueParameter *N, SmallVectorImpl<uint64_t> &Record,
  unsigned Abbrev) {
Record.push_back(N->isDistinct());
Record.push_back(N->getTag());
Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
Record.push_back(VE.getMetadataOrNullID(N->getType()));
Record.push_back(VE.getMetadataOrNullID(N->getValue()));

Stream.EmitRecord(bitc::METADATA_TEMPLATE_VALUE, Record, Abbrev);
Record.clear();
1724}

1726void ModuleBitcodeWriter::writeDIGlobalVariable(
  const DIGlobalVariable *N, SmallVectorImpl<uint64_t> &Record,
  unsigned Abbrev) {
const uint64_t Version = 1 << 1;
Record.push_back((uint64_t)N->isDistinct() | Version);
Record.push_back(VE.getMetadataOrNullID(N->getScope()));
Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
Record.push_back(VE.getMetadataOrNullID(N->getRawLinkageName()));
Record.push_back(VE.getMetadataOrNullID(N->getFile()));
Record.push_back(N->getLine());
Record.push_back(VE.getMetadataOrNullID(N->getType()));
Record.push_back(N->isLocalToUnit());
Record.push_back(N->isDefinition());
Record.push_back(/* expr */ 0);
Record.push_back(VE.getMetadataOrNullID(N->getStaticDataMemberDeclaration()));
Record.push_back(N->getAlignInBits());

Stream.EmitRecord(bitc::METADATA_GLOBAL_VAR, Record, Abbrev);
Record.clear();
1745}

1747void ModuleBitcodeWriter::writeDILocalVariable(
  const DILocalVariable *N, SmallVectorImpl<uint64_t> &Record,
  unsigned Abbrev) {
// In order to support all possible bitcode formats in BitcodeReader we need
// to distinguish the following cases:
// 1) Record has no artificial tag (Record[1]),
//   has no obsolete inlinedAt field (Record[9]).
//   In this case Record size will be 8, HasAlignment flag is false.
// 2) Record has artificial tag (Record[1]),
//   has no obsolete inlignedAt field (Record[9]).
//   In this case Record size will be 9, HasAlignment flag is false.
// 3) Record has both artificial tag (Record[1]) and
//   obsolete inlignedAt field (Record[9]).
//   In this case Record size will be 10, HasAlignment flag is false.
// 4) Record has neither artificial tag, nor inlignedAt field, but
//   HasAlignment flag is true and Record[8] contains alignment value.
const uint64_t HasAlignmentFlag = 1 << 1;
Record.push_back((uint64_t)N->isDistinct() | HasAlignmentFlag);
Record.push_back(VE.getMetadataOrNullID(N->getScope()));
Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
Record.push_back(VE.getMetadataOrNullID(N->getFile()));
Record.push_back(N->getLine());
Record.push_back(VE.getMetadataOrNullID(N->getType()));
Record.push_back(N->getArg());
Record.push_back(N->getFlags());
Record.push_back(N->getAlignInBits());

Stream.EmitRecord(bitc::METADATA_LOCAL_VAR, Record, Abbrev);
Record.clear();
1776}

1778void ModuleBitcodeWriter::writeDIExpression(const DIExpression *N,
                                          SmallVectorImpl<uint64_t> &Record,
                                          unsigned Abbrev) {
Record.reserve(N->getElements().size() + 1);
const uint64_t Version = 3 << 1;
Record.push_back((uint64_t)N->isDistinct() | Version);
Record.append(N->elements_begin(), N->elements_end());

Stream.EmitRecord(bitc::METADATA_EXPRESSION, Record, Abbrev);
Record.clear();
1788}

1790void ModuleBitcodeWriter::writeDIGlobalVariableExpression(
  const DIGlobalVariableExpression *N, SmallVectorImpl<uint64_t> &Record,
  unsigned Abbrev) {
Record.push_back(N->isDistinct());
Record.push_back(VE.getMetadataOrNullID(N->getVariable()));
Record.push_back(VE.getMetadataOrNullID(N->getExpression()));

Stream.EmitRecord(bitc::METADATA_GLOBAL_VAR_EXPR, Record, Abbrev);
Record.clear();
1799}

1801void ModuleBitcodeWriter::writeDIObjCProperty(const DIObjCProperty *N,
                                            SmallVectorImpl<uint64_t> &Record,
                                            unsigned Abbrev) {
Record.push_back(N->isDistinct());
Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
Record.push_back(VE.getMetadataOrNullID(N->getFile()));
Record.push_back(N->getLine());
Record.push_back(VE.getMetadataOrNullID(N->getRawSetterName()));
Record.push_back(VE.getMetadataOrNullID(N->getRawGetterName()));
Record.push_back(N->getAttributes());
Record.push_back(VE.getMetadataOrNullID(N->getType()));

Stream.EmitRecord(bitc::METADATA_OBJC_PROPERTY, Record, Abbrev);
Record.clear();
1815}

1817void ModuleBitcodeWriter::writeDIImportedEntity(
  const DIImportedEntity *N, SmallVectorImpl<uint64_t> &Record,
  unsigned Abbrev) {
Record.push_back(N->isDistinct());
Record.push_back(N->getTag());
Record.push_back(VE.getMetadataOrNullID(N->getScope()));
Record.push_back(VE.getMetadataOrNullID(N->getEntity()));
Record.push_back(N->getLine());
Record.push_back(VE.getMetadataOrNullID(N->getRawName()));
Record.push_back(VE.getMetadataOrNullID(N->getRawFile()));

Stream.EmitRecord(bitc::METADATA_IMPORTED_ENTITY, Record, Abbrev);
Record.clear();
1830}

1832unsigned ModuleBitcodeWriter::createNamedMetadataAbbrev() {
auto Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_NAME));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
return Stream.EmitAbbrev(std::move(Abbv));
1838}

1840void ModuleBitcodeWriter::writeNamedMetadata(
  SmallVectorImpl<uint64_t> &Record) {
if (M.named_metadata_empty())
  return;

unsigned Abbrev = createNamedMetadataAbbrev();
for (const NamedMDNode &NMD : M.named_metadata()) {
  // Write name.
  StringRef Str = NMD.getName();
  Record.append(Str.bytes_begin(), Str.bytes_end());
  Stream.EmitRecord(bitc::METADATA_NAME, Record, Abbrev);
  Record.clear();

  // Write named metadata operands.
  for (const MDNode *N : NMD.operands())
    Record.push_back(VE.getMetadataID(N));
  Stream.EmitRecord(bitc::METADATA_NAMED_NODE, Record, 0);
  Record.clear();
}
1859}

1861unsigned ModuleBitcodeWriter::createMetadataStringsAbbrev() {
auto Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_STRINGS));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // # of strings
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // offset to chars
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
return Stream.EmitAbbrev(std::move(Abbv));
1868}

1870/// Write out a record for MDString.
1871///
1872/// All the metadata strings in a metadata block are emitted in a single
1873/// record.  The sizes and strings themselves are shoved into a blob.
1874void ModuleBitcodeWriter::writeMetadataStrings(
  ArrayRef<const Metadata *> Strings, SmallVectorImpl<uint64_t> &Record) {
if (Strings.empty())
  return;

// Start the record with the number of strings.
Record.push_back(bitc::METADATA_STRINGS);
Record.push_back(Strings.size());

// Emit the sizes of the strings in the blob.
SmallString<256> Blob;
{
  BitstreamWriter W(Blob);
  for (const Metadata *MD : Strings)
    W.EmitVBR(cast<MDString>(MD)->getLength(), 6);
  W.FlushToWord();
}

// Add the offset to the strings to the record.
Record.push_back(Blob.size());

// Add the strings to the blob.
for (const Metadata *MD : Strings)
  Blob.append(cast<MDString>(MD)->getString());

// Emit the final record.
Stream.EmitRecordWithBlob(createMetadataStringsAbbrev(), Record, Blob);
Record.clear();
1902}

1904// Generates an enum to use as an index in the Abbrev array of Metadata record.
1905enum MetadataAbbrev : unsigned {
1906#define HANDLE_MDNODE_LEAF(CLASS) CLASS##AbbrevID,
1907#include "llvm/IR/Metadata.def"
LastPlusOne
1909};

1911void ModuleBitcodeWriter::writeMetadataRecords(
  ArrayRef<const Metadata *> MDs, SmallVectorImpl<uint64_t> &Record,
  std::vector<unsigned> *MDAbbrevs, std::vector<uint64_t> *IndexPos) {
if (MDs.empty())
  return;

// Initialize MDNode abbreviations.
1918#define HANDLE_MDNODE_LEAF(CLASS) unsigned CLASS##Abbrev = 0;
1919#include "llvm/IR/Metadata.def"

for (const Metadata *MD : MDs) {
  if (IndexPos)
    IndexPos->push_back(Stream.GetCurrentBitNo());
  if (const MDNode *N = dyn_cast<MDNode>(MD)) {
    assert(N->isResolved() && "Expected forward references to be resolved")(static_cast <bool> (N->isResolved() && "Expected forward references to be resolved"
) ? void (0) : __assert_fail ("N->isResolved() && \"Expected forward references to be resolved\""
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 1925, __extension__ __PRETTY_FUNCTION__));

    switch (N->getMetadataID()) {
    default:
      llvm_unreachable("Invalid MDNode subclass")::llvm::llvm_unreachable_internal("Invalid MDNode subclass", "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 1929);
1930#define HANDLE_MDNODE_LEAF(CLASS)                                              \
case Metadata::CLASS##Kind:                                                  \
  if (MDAbbrevs)                                                             \
    write##CLASS(cast<CLASS>(N), Record,                                     \
                 (*MDAbbrevs)[MetadataAbbrev::CLASS##AbbrevID]);             \
  else                                                                       \
    write##CLASS(cast<CLASS>(N), Record, CLASS##Abbrev);                     \
  continue;
1938#include "llvm/IR/Metadata.def"
    }
  }
  writeValueAsMetadata(cast<ValueAsMetadata>(MD), Record);
}
1943}

1945void ModuleBitcodeWriter::writeModuleMetadata() {
if (!VE.hasMDs() && M.named_metadata_empty())
  return;

Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 4);
SmallVector<uint64_t, 64> Record;

// Emit all abbrevs upfront, so that the reader can jump in the middle of the
// block and load any metadata.
std::vector<unsigned> MDAbbrevs;

MDAbbrevs.resize(MetadataAbbrev::LastPlusOne);
MDAbbrevs[MetadataAbbrev::DILocationAbbrevID] = createDILocationAbbrev();
MDAbbrevs[MetadataAbbrev::GenericDINodeAbbrevID] =
    createGenericDINodeAbbrev();

auto Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_INDEX_OFFSET));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
unsigned OffsetAbbrev = Stream.EmitAbbrev(std::move(Abbv));

Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(bitc::METADATA_INDEX));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
unsigned IndexAbbrev = Stream.EmitAbbrev(std::move(Abbv));

// Emit MDStrings together upfront.
writeMetadataStrings(VE.getMDStrings(), Record);

// We only emit an index for the metadata record if we have more than a given
// (naive) threshold of metadatas, otherwise it is not worth it.
if (VE.getNonMDStrings().size() > IndexThreshold) {
  // Write a placeholder value in for the offset of the metadata index,
  // which is written after the records, so that it can include
  // the offset of each entry. The placeholder offset will be
  // updated after all records are emitted.
  uint64_t Vals[] = {0, 0};
  Stream.EmitRecord(bitc::METADATA_INDEX_OFFSET, Vals, OffsetAbbrev);
}

// Compute and save the bit offset to the current position, which will be
// patched when we emit the index later. We can simply subtract the 64-bit
// fixed size from the current bit number to get the location to backpatch.
uint64_t IndexOffsetRecordBitPos = Stream.GetCurrentBitNo();

// This index will contain the bitpos for each individual record.
std::vector<uint64_t> IndexPos;
IndexPos.reserve(VE.getNonMDStrings().size());

// Write all the records
writeMetadataRecords(VE.getNonMDStrings(), Record, &MDAbbrevs, &IndexPos);

if (VE.getNonMDStrings().size() > IndexThreshold) {
  // Now that we have emitted all the records we will emit the index. But
  // first
  // backpatch the forward reference so that the reader can skip the records
  // efficiently.
  Stream.BackpatchWord64(IndexOffsetRecordBitPos - 64,
                         Stream.GetCurrentBitNo() - IndexOffsetRecordBitPos);

  // Delta encode the index.
  uint64_t PreviousValue = IndexOffsetRecordBitPos;
  for (auto &Elt : IndexPos) {
    auto EltDelta = Elt - PreviousValue;
    PreviousValue = Elt;
    Elt = EltDelta;
  }
  // Emit the index record.
  Stream.EmitRecord(bitc::METADATA_INDEX, IndexPos, IndexAbbrev);
  IndexPos.clear();
}

// Write the named metadata now.
writeNamedMetadata(Record);

auto AddDeclAttachedMetadata = [&](const GlobalObject &GO) {
  SmallVector<uint64_t, 4> Record;
  Record.push_back(VE.getValueID(&GO));
  pushGlobalMetadataAttachment(Record, GO);
  Stream.EmitRecord(bitc::METADATA_GLOBAL_DECL_ATTACHMENT, Record);
};
for (const Function &F : M)
  if (F.isDeclaration() && F.hasMetadata())
    AddDeclAttachedMetadata(F);
// FIXME: Only store metadata for declarations here, and move data for global
// variable definitions to a separate block (PR28134).
for (const GlobalVariable &GV : M.globals())
  if (GV.hasMetadata())
    AddDeclAttachedMetadata(GV);

Stream.ExitBlock();
2038}

2040void ModuleBitcodeWriter::writeFunctionMetadata(const Function &F) {
if (!VE.hasMDs())
  return;

Stream.EnterSubblock(bitc::METADATA_BLOCK_ID, 3);
SmallVector<uint64_t, 64> Record;
writeMetadataStrings(VE.getMDStrings(), Record);
writeMetadataRecords(VE.getNonMDStrings(), Record);
Stream.ExitBlock();
2049}

2051void ModuleBitcodeWriter::pushGlobalMetadataAttachment(
  SmallVectorImpl<uint64_t> &Record, const GlobalObject &GO) {
// [n x [id, mdnode]]
SmallVector<std::pair<unsigned, MDNode *>, 4> MDs;
GO.getAllMetadata(MDs);
for (const auto &I : MDs) {
  Record.push_back(I.first);
  Record.push_back(VE.getMetadataID(I.second));
}
2060}

2062void ModuleBitcodeWriter::writeFunctionMetadataAttachment(const Function &F) {
Stream.EnterSubblock(bitc::METADATA_ATTACHMENT_ID, 3);

SmallVector<uint64_t, 64> Record;

if (F.hasMetadata()) {
  pushGlobalMetadataAttachment(Record, F);
  Stream.EmitRecord(bitc::METADATA_ATTACHMENT, Record, 0);
  Record.clear();
}

// Write metadata attachments
// METADATA_ATTACHMENT - [m x [value, [n x [id, mdnode]]]
SmallVector<std::pair<unsigned, MDNode *>, 4> MDs;
for (const BasicBlock &BB : F)
  for (const Instruction &I : BB) {
    MDs.clear();
    I.getAllMetadataOtherThanDebugLoc(MDs);

    // If no metadata, ignore instruction.
    if (MDs.empty()) continue;

    Record.push_back(VE.getInstructionID(&I));

    for (unsigned i = 0, e = MDs.size(); i != e; ++i) {
      Record.push_back(MDs[i].first);
      Record.push_back(VE.getMetadataID(MDs[i].second));
    }
    Stream.EmitRecord(bitc::METADATA_ATTACHMENT, Record, 0);
    Record.clear();
  }

Stream.ExitBlock();
2095}

2097void ModuleBitcodeWriter::writeModuleMetadataKinds() {
SmallVector<uint64_t, 64> Record;

// Write metadata kinds
// METADATA_KIND - [n x [id, name]]
SmallVector<StringRef, 8> Names;
M.getMDKindNames(Names);

if (Names.empty()) return;

Stream.EnterSubblock(bitc::METADATA_KIND_BLOCK_ID, 3);

for (unsigned MDKindID = 0, e = Names.size(); MDKindID != e; ++MDKindID) {
  Record.push_back(MDKindID);
  StringRef KName = Names[MDKindID];
  Record.append(KName.begin(), KName.end());

  Stream.EmitRecord(bitc::METADATA_KIND, Record, 0);
  Record.clear();
}

Stream.ExitBlock();
2119}

2121void ModuleBitcodeWriter::writeOperandBundleTags() {
// Write metadata kinds
//
// OPERAND_BUNDLE_TAGS_BLOCK_ID : N x OPERAND_BUNDLE_TAG
//
// OPERAND_BUNDLE_TAG - [strchr x N]

SmallVector<StringRef, 8> Tags;
M.getOperandBundleTags(Tags);

if (Tags.empty())
  return;

Stream.EnterSubblock(bitc::OPERAND_BUNDLE_TAGS_BLOCK_ID, 3);

SmallVector<uint64_t, 64> Record;

for (auto Tag : Tags) {
  Record.append(Tag.begin(), Tag.end());

  Stream.EmitRecord(bitc::OPERAND_BUNDLE_TAG, Record, 0);
  Record.clear();
}

Stream.ExitBlock();
2146}

2148void ModuleBitcodeWriter::writeSyncScopeNames() {
SmallVector<StringRef, 8> SSNs;
M.getContext().getSyncScopeNames(SSNs);
if (SSNs.empty())
  return;

Stream.EnterSubblock(bitc::SYNC_SCOPE_NAMES_BLOCK_ID, 2);

SmallVector<uint64_t, 64> Record;
for (auto SSN : SSNs) {
  Record.append(SSN.begin(), SSN.end());
  Stream.EmitRecord(bitc::SYNC_SCOPE_NAME, Record, 0);
  Record.clear();
}

Stream.ExitBlock();
2164}

2166static void emitSignedInt64(SmallVectorImpl<uint64_t> &Vals, uint64_t V) {
if ((int64_t)V >= 0)
  Vals.push_back(V << 1);
else
  Vals.push_back((-V << 1) | 1);
2171}

2173void ModuleBitcodeWriter::writeConstants(unsigned FirstVal, unsigned LastVal,
                                       bool isGlobal) {
if (FirstVal == LastVal) return;

Stream.EnterSubblock(bitc::CONSTANTS_BLOCK_ID, 4);

unsigned AggregateAbbrev = 0;
unsigned String8Abbrev = 0;
unsigned CString7Abbrev = 0;
unsigned CString6Abbrev = 0;
// If this is a constant pool for the module, emit module-specific abbrevs.
if (isGlobal) {
  // Abbrev for CST_CODE_AGGREGATE.
  auto Abbv = std::make_shared<BitCodeAbbrev>();
  Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_AGGREGATE));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, Log2_32_Ceil(LastVal+1)));
  AggregateAbbrev = Stream.EmitAbbrev(std::move(Abbv));

  // Abbrev for CST_CODE_STRING.
  Abbv = std::make_shared<BitCodeAbbrev>();
  Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_STRING));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
  String8Abbrev = Stream.EmitAbbrev(std::move(Abbv));
  // Abbrev for CST_CODE_CSTRING.
  Abbv = std::make_shared<BitCodeAbbrev>();
  Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CSTRING));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
  CString7Abbrev = Stream.EmitAbbrev(std::move(Abbv));
  // Abbrev for CST_CODE_CSTRING.
  Abbv = std::make_shared<BitCodeAbbrev>();
  Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CSTRING));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
  CString6Abbrev = Stream.EmitAbbrev(std::move(Abbv));
}

SmallVector<uint64_t, 64> Record;

const ValueEnumerator::ValueList &Vals = VE.getValues();
Type *LastTy = nullptr;
for (unsigned i = FirstVal; i != LastVal; ++i) {
  const Value *V = Vals[i].first;
  // If we need to switch types, do so now.
  if (V->getType() != LastTy) {
    LastTy = V->getType();
    Record.push_back(VE.getTypeID(LastTy));
    Stream.EmitRecord(bitc::CST_CODE_SETTYPE, Record,
                      CONSTANTS_SETTYPE_ABBREV);
    Record.clear();
  }

  if (const InlineAsm *IA = dyn_cast<InlineAsm>(V)) {
    Record.push_back(unsigned(IA->hasSideEffects()) |
                     unsigned(IA->isAlignStack()) << 1 |
                     unsigned(IA->getDialect()&1) << 2);

    // Add the asm string.
    const std::string &AsmStr = IA->getAsmString();
    Record.push_back(AsmStr.size());
    Record.append(AsmStr.begin(), AsmStr.end());

    // Add the constraint string.
    const std::string &ConstraintStr = IA->getConstraintString();
    Record.push_back(ConstraintStr.size());
    Record.append(ConstraintStr.begin(), ConstraintStr.end());
    Stream.EmitRecord(bitc::CST_CODE_INLINEASM, Record);
    Record.clear();
    continue;
  }
  const Constant *C = cast<Constant>(V);
  unsigned Code = -1U;
  unsigned AbbrevToUse = 0;
  if (C->isNullValue()) {
    Code = bitc::CST_CODE_NULL;
  } else if (isa<UndefValue>(C)) {
    Code = bitc::CST_CODE_UNDEF;
  } else if (const ConstantInt *IV = dyn_cast<ConstantInt>(C)) {
    if (IV->getBitWidth() <= 64) {
      uint64_t V = IV->getSExtValue();
      emitSignedInt64(Record, V);
      Code = bitc::CST_CODE_INTEGER;
      AbbrevToUse = CONSTANTS_INTEGER_ABBREV;
    } else {                             // Wide integers, > 64 bits in size.
      // We have an arbitrary precision integer value to write whose
      // bit width is > 64. However, in canonical unsigned integer
      // format it is likely that the high bits are going to be zero.
      // So, we only write the number of active words.
      unsigned NWords = IV->getValue().getActiveWords();
      const uint64_t *RawWords = IV->getValue().getRawData();
      for (unsigned i = 0; i != NWords; ++i) {
        emitSignedInt64(Record, RawWords[i]);
      }
      Code = bitc::CST_CODE_WIDE_INTEGER;
    }
  } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(C)) {
    Code = bitc::CST_CODE_FLOAT;
    Type *Ty = CFP->getType();
    if (Ty->isHalfTy() || Ty->isFloatTy() || Ty->isDoubleTy()) {
      Record.push_back(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
    } else if (Ty->isX86_FP80Ty()) {
      // api needed to prevent premature destruction
      // bits are not in the same order as a normal i80 APInt, compensate.
      APInt api = CFP->getValueAPF().bitcastToAPInt();
      const uint64_t *p = api.getRawData();
      Record.push_back((p[1] << 48) | (p[0] >> 16));
      Record.push_back(p[0] & 0xffffLL);
    } else if (Ty->isFP128Ty() || Ty->isPPC_FP128Ty()) {
      APInt api = CFP->getValueAPF().bitcastToAPInt();
      const uint64_t *p = api.getRawData();
      Record.push_back(p[0]);
      Record.push_back(p[1]);
    } else {
      assert(0 && "Unknown FP type!")(static_cast <bool> (0 && "Unknown FP type!") ?
 void (0) : __assert_fail ("0 && \"Unknown FP type!\""
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 2288, __extension__ __PRETTY_FUNCTION__));
    }
  } else if (isa<ConstantDataSequential>(C) &&
             cast<ConstantDataSequential>(C)->isString()) {
    const ConstantDataSequential *Str = cast<ConstantDataSequential>(C);
    // Emit constant strings specially.
    unsigned NumElts = Str->getNumElements();
    // If this is a null-terminated string, use the denser CSTRING encoding.
    if (Str->isCString()) {
      Code = bitc::CST_CODE_CSTRING;
      --NumElts;  // Don't encode the null, which isn't allowed by char6.
    } else {
      Code = bitc::CST_CODE_STRING;
      AbbrevToUse = String8Abbrev;
    }
    bool isCStr7 = Code == bitc::CST_CODE_CSTRING;
    bool isCStrChar6 = Code == bitc::CST_CODE_CSTRING;
    for (unsigned i = 0; i != NumElts; ++i) {
      unsigned char V = Str->getElementAsInteger(i);
      Record.push_back(V);
      isCStr7 &= (V & 128) == 0;
      if (isCStrChar6)
        isCStrChar6 = BitCodeAbbrevOp::isChar6(V);
    }

    if (isCStrChar6)
      AbbrevToUse = CString6Abbrev;
    else if (isCStr7)
      AbbrevToUse = CString7Abbrev;
  } else if (const ConstantDataSequential *CDS =
                dyn_cast<ConstantDataSequential>(C)) {
    Code = bitc::CST_CODE_DATA;
    Type *EltTy = CDS->getType()->getElementType();
    if (isa<IntegerType>(EltTy)) {
      for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i)
        Record.push_back(CDS->getElementAsInteger(i));
    } else {
      for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i)
        Record.push_back(
            CDS->getElementAsAPFloat(i).bitcastToAPInt().getLimitedValue());
    }
  } else if (isa<ConstantAggregate>(C)) {
    Code = bitc::CST_CODE_AGGREGATE;
    for (const Value *Op : C->operands())
      Record.push_back(VE.getValueID(Op));
    AbbrevToUse = AggregateAbbrev;
  } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
    switch (CE->getOpcode()) {
    default:
      if (Instruction::isCast(CE->getOpcode())) {
        Code = bitc::CST_CODE_CE_CAST;
        Record.push_back(getEncodedCastOpcode(CE->getOpcode()));
        Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
        Record.push_back(VE.getValueID(C->getOperand(0)));
        AbbrevToUse = CONSTANTS_CE_CAST_Abbrev;
      } else {
        assert(CE->getNumOperands() == 2 && "Unknown constant expr!")(static_cast <bool> (CE->getNumOperands() == 2 &&
 "Unknown constant expr!") ? void (0) : __assert_fail ("CE->getNumOperands() == 2 && \"Unknown constant expr!\""
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 2344, __extension__ __PRETTY_FUNCTION__));
        Code = bitc::CST_CODE_CE_BINOP;
        Record.push_back(getEncodedBinaryOpcode(CE->getOpcode()));
        Record.push_back(VE.getValueID(C->getOperand(0)));
        Record.push_back(VE.getValueID(C->getOperand(1)));
        uint64_t Flags = getOptimizationFlags(CE);
        if (Flags != 0)
          Record.push_back(Flags);
      }
      break;
    case Instruction::GetElementPtr: {
      Code = bitc::CST_CODE_CE_GEP;
      const auto *GO = cast<GEPOperator>(C);
      Record.push_back(VE.getTypeID(GO->getSourceElementType()));
      if (Optional<unsigned> Idx = GO->getInRangeIndex()) {
        Code = bitc::CST_CODE_CE_GEP_WITH_INRANGE_INDEX;
        Record.push_back((*Idx << 1) | GO->isInBounds());
      } else if (GO->isInBounds())
        Code = bitc::CST_CODE_CE_INBOUNDS_GEP;
      for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i) {
        Record.push_back(VE.getTypeID(C->getOperand(i)->getType()));
        Record.push_back(VE.getValueID(C->getOperand(i)));
      }
      break;
    }
    case Instruction::Select:
      Code = bitc::CST_CODE_CE_SELECT;
      Record.push_back(VE.getValueID(C->getOperand(0)));
      Record.push_back(VE.getValueID(C->getOperand(1)));
      Record.push_back(VE.getValueID(C->getOperand(2)));
      break;
    case Instruction::ExtractElement:
      Code = bitc::CST_CODE_CE_EXTRACTELT;
      Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
      Record.push_back(VE.getValueID(C->getOperand(0)));
      Record.push_back(VE.getTypeID(C->getOperand(1)->getType()));
      Record.push_back(VE.getValueID(C->getOperand(1)));
      break;
    case Instruction::InsertElement:
      Code = bitc::CST_CODE_CE_INSERTELT;
      Record.push_back(VE.getValueID(C->getOperand(0)));
      Record.push_back(VE.getValueID(C->getOperand(1)));
      Record.push_back(VE.getTypeID(C->getOperand(2)->getType()));
      Record.push_back(VE.getValueID(C->getOperand(2)));
      break;
    case Instruction::ShuffleVector:
      // If the return type and argument types are the same, this is a
      // standard shufflevector instruction.  If the types are different,
      // then the shuffle is widening or truncating the input vectors, and
      // the argument type must also be encoded.
      if (C->getType() == C->getOperand(0)->getType()) {
        Code = bitc::CST_CODE_CE_SHUFFLEVEC;
      } else {
        Code = bitc::CST_CODE_CE_SHUFVEC_EX;
        Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
      }
      Record.push_back(VE.getValueID(C->getOperand(0)));
      Record.push_back(VE.getValueID(C->getOperand(1)));
      Record.push_back(VE.getValueID(C->getOperand(2)));
      break;
    case Instruction::ICmp:
    case Instruction::FCmp:
      Code = bitc::CST_CODE_CE_CMP;
      Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
      Record.push_back(VE.getValueID(C->getOperand(0)));
      Record.push_back(VE.getValueID(C->getOperand(1)));
      Record.push_back(CE->getPredicate());
      break;
    }
  } else if (const BlockAddress *BA = dyn_cast<BlockAddress>(C)) {
    Code = bitc::CST_CODE_BLOCKADDRESS;
    Record.push_back(VE.getTypeID(BA->getFunction()->getType()));
    Record.push_back(VE.getValueID(BA->getFunction()));
    Record.push_back(VE.getGlobalBasicBlockID(BA->getBasicBlock()));
  } else {
2419#ifndef NDEBUG
    C->dump();
2421#endif
    llvm_unreachable("Unknown constant!")::llvm::llvm_unreachable_internal("Unknown constant!", "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 2422);
  }
  Stream.EmitRecord(Code, Record, AbbrevToUse);
  Record.clear();
}

Stream.ExitBlock();
2429}

2431void ModuleBitcodeWriter::writeModuleConstants() {
const ValueEnumerator::ValueList &Vals = VE.getValues();

// Find the first constant to emit, which is the first non-globalvalue value.
// We know globalvalues have been emitted by WriteModuleInfo.
for (unsigned i = 0, e = Vals.size(); i != e; ++i) {
  if (!isa<GlobalValue>(Vals[i].first)) {
    writeConstants(i, Vals.size(), true);
    return;
  }
}
2442}

2444/// pushValueAndType - The file has to encode both the value and type id for
2445/// many values, because we need to know what type to create for forward
2446/// references.  However, most operands are not forward references, so this type
2447/// field is not needed.
2448///
2449/// This function adds V's value ID to Vals.  If the value ID is higher than the
2450/// instruction ID, then it is a forward reference, and it also includes the
2451/// type ID.  The value ID that is written is encoded relative to the InstID.
2452bool ModuleBitcodeWriter::pushValueAndType(const Value *V, unsigned InstID,
                                         SmallVectorImpl<unsigned> &Vals) {
unsigned ValID = VE.getValueID(V);
// Make encoding relative to the InstID.
Vals.push_back(InstID - ValID);
if (ValID >= InstID) {
  Vals.push_back(VE.getTypeID(V->getType()));
  return true;
}
return false;
2462}

2464void ModuleBitcodeWriter::writeOperandBundles(ImmutableCallSite CS,
                                            unsigned InstID) {
SmallVector<unsigned, 64> Record;
LLVMContext &C = CS.getInstruction()->getContext();

for (unsigned i = 0, e = CS.getNumOperandBundles(); i != e; ++i) {
  const auto &Bundle = CS.getOperandBundleAt(i);
  Record.push_back(C.getOperandBundleTagID(Bundle.getTagName()));

  for (auto &Input : Bundle.Inputs)
    pushValueAndType(Input, InstID, Record);

  Stream.EmitRecord(bitc::FUNC_CODE_OPERAND_BUNDLE, Record);
  Record.clear();
}
2479}

2481/// pushValue - Like pushValueAndType, but where the type of the value is
2482/// omitted (perhaps it was already encoded in an earlier operand).
2483void ModuleBitcodeWriter::pushValue(const Value *V, unsigned InstID,
                                  SmallVectorImpl<unsigned> &Vals) {
unsigned ValID = VE.getValueID(V);
Vals.push_back(InstID - ValID);
2487}

2489void ModuleBitcodeWriter::pushValueSigned(const Value *V, unsigned InstID,
                                        SmallVectorImpl<uint64_t> &Vals) {
unsigned ValID = VE.getValueID(V);
int64_t diff = ((int32_t)InstID - (int32_t)ValID);
emitSignedInt64(Vals, diff);
2494}

2496/// WriteInstruction - Emit an instruction to the specified stream.
2497void ModuleBitcodeWriter::writeInstruction(const Instruction &I,
                                         unsigned InstID,
                                         SmallVectorImpl<unsigned> &Vals) {
unsigned Code = 0;
unsigned AbbrevToUse = 0;
VE.setInstructionID(&I);
switch (I.getOpcode()) {
default:
  if (Instruction::isCast(I.getOpcode())) {
    Code = bitc::FUNC_CODE_INST_CAST;
    if (!pushValueAndType(I.getOperand(0), InstID, Vals))
      AbbrevToUse = FUNCTION_INST_CAST_ABBREV;
    Vals.push_back(VE.getTypeID(I.getType()));
    Vals.push_back(getEncodedCastOpcode(I.getOpcode()));
  } else {
    assert(isa<BinaryOperator>(I) && "Unknown instruction!")(static_cast <bool> (isa<BinaryOperator>(I) &&
 "Unknown instruction!") ? void (0) : __assert_fail ("isa<BinaryOperator>(I) && \"Unknown instruction!\""
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 2512, __extension__ __PRETTY_FUNCTION__));
    Code = bitc::FUNC_CODE_INST_BINOP;
    if (!pushValueAndType(I.getOperand(0), InstID, Vals))
      AbbrevToUse = FUNCTION_INST_BINOP_ABBREV;
    pushValue(I.getOperand(1), InstID, Vals);
    Vals.push_back(getEncodedBinaryOpcode(I.getOpcode()));
    uint64_t Flags = getOptimizationFlags(&I);
    if (Flags != 0) {
      if (AbbrevToUse == FUNCTION_INST_BINOP_ABBREV)
        AbbrevToUse = FUNCTION_INST_BINOP_FLAGS_ABBREV;
      Vals.push_back(Flags);
    }
  }
  break;

case Instruction::GetElementPtr: {
  Code = bitc::FUNC_CODE_INST_GEP;
  AbbrevToUse = FUNCTION_INST_GEP_ABBREV;
  auto &GEPInst = cast<GetElementPtrInst>(I);
  Vals.push_back(GEPInst.isInBounds());
  Vals.push_back(VE.getTypeID(GEPInst.getSourceElementType()));
  for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
    pushValueAndType(I.getOperand(i), InstID, Vals);
  break;
}
case Instruction::ExtractValue: {
  Code = bitc::FUNC_CODE_INST_EXTRACTVAL;
  pushValueAndType(I.getOperand(0), InstID, Vals);
  const ExtractValueInst *EVI = cast<ExtractValueInst>(&I);
  Vals.append(EVI->idx_begin(), EVI->idx_end());
  break;
}
case Instruction::InsertValue: {
  Code = bitc::FUNC_CODE_INST_INSERTVAL;
  pushValueAndType(I.getOperand(0), InstID, Vals);
  pushValueAndType(I.getOperand(1), InstID, Vals);
  const InsertValueInst *IVI = cast<InsertValueInst>(&I);
  Vals.append(IVI->idx_begin(), IVI->idx_end());
  break;
}
case Instruction::Select:
  Code = bitc::FUNC_CODE_INST_VSELECT;
  pushValueAndType(I.getOperand(1), InstID, Vals);
  pushValue(I.getOperand(2), InstID, Vals);
  pushValueAndType(I.getOperand(0), InstID, Vals);
  break;
case Instruction::ExtractElement:
  Code = bitc::FUNC_CODE_INST_EXTRACTELT;
  pushValueAndType(I.getOperand(0), InstID, Vals);
  pushValueAndType(I.getOperand(1), InstID, Vals);
  break;
case Instruction::InsertElement:
  Code = bitc::FUNC_CODE_INST_INSERTELT;
  pushValueAndType(I.getOperand(0), InstID, Vals);
  pushValue(I.getOperand(1), InstID, Vals);
  pushValueAndType(I.getOperand(2), InstID, Vals);
  break;
case Instruction::ShuffleVector:
  Code = bitc::FUNC_CODE_INST_SHUFFLEVEC;
  pushValueAndType(I.getOperand(0), InstID, Vals);
  pushValue(I.getOperand(1), InstID, Vals);
  pushValue(I.getOperand(2), InstID, Vals);
  break;
case Instruction::ICmp:
case Instruction::FCmp: {
  // compare returning Int1Ty or vector of Int1Ty
  Code = bitc::FUNC_CODE_INST_CMP2;
  pushValueAndType(I.getOperand(0), InstID, Vals);
  pushValue(I.getOperand(1), InstID, Vals);
  Vals.push_back(cast<CmpInst>(I).getPredicate());
  uint64_t Flags = getOptimizationFlags(&I);
  if (Flags != 0)
    Vals.push_back(Flags);
  break;
}

case Instruction::Ret:
  {
    Code = bitc::FUNC_CODE_INST_RET;
    unsigned NumOperands = I.getNumOperands();
    if (NumOperands == 0)
      AbbrevToUse = FUNCTION_INST_RET_VOID_ABBREV;
    else if (NumOperands == 1) {
      if (!pushValueAndType(I.getOperand(0), InstID, Vals))
        AbbrevToUse = FUNCTION_INST_RET_VAL_ABBREV;
    } else {
      for (unsigned i = 0, e = NumOperands; i != e; ++i)
        pushValueAndType(I.getOperand(i), InstID, Vals);
    }
  }
  break;
case Instruction::Br:
  {
    Code = bitc::FUNC_CODE_INST_BR;
    const BranchInst &II = cast<BranchInst>(I);
    Vals.push_back(VE.getValueID(II.getSuccessor(0)));
    if (II.isConditional()) {
      Vals.push_back(VE.getValueID(II.getSuccessor(1)));
      pushValue(II.getCondition(), InstID, Vals);
    }
  }
  break;
case Instruction::Switch:
  {
    Code = bitc::FUNC_CODE_INST_SWITCH;
    const SwitchInst &SI = cast<SwitchInst>(I);
    Vals.push_back(VE.getTypeID(SI.getCondition()->getType()));
    pushValue(SI.getCondition(), InstID, Vals);
    Vals.push_back(VE.getValueID(SI.getDefaultDest()));
    for (auto Case : SI.cases()) {
      Vals.push_back(VE.getValueID(Case.getCaseValue()));
      Vals.push_back(VE.getValueID(Case.getCaseSuccessor()));
    }
  }
  break;
case Instruction::IndirectBr:
  Code = bitc::FUNC_CODE_INST_INDIRECTBR;
  Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
  // Encode the address operand as relative, but not the basic blocks.
  pushValue(I.getOperand(0), InstID, Vals);
  for (unsigned i = 1, e = I.getNumOperands(); i != e; ++i)
    Vals.push_back(VE.getValueID(I.getOperand(i)));
  break;

case Instruction::Invoke: {
  const InvokeInst *II = cast<InvokeInst>(&I);
  const Value *Callee = II->getCalledValue();
  FunctionType *FTy = II->getFunctionType();

  if (II->hasOperandBundles())
    writeOperandBundles(II, InstID);

  Code = bitc::FUNC_CODE_INST_INVOKE;

  Vals.push_back(VE.getAttributeListID(II->getAttributes()));
  Vals.push_back(II->getCallingConv() | 1 << 13);
  Vals.push_back(VE.getValueID(II->getNormalDest()));
  Vals.push_back(VE.getValueID(II->getUnwindDest()));
  Vals.push_back(VE.getTypeID(FTy));
  pushValueAndType(Callee, InstID, Vals);

  // Emit value #'s for the fixed parameters.
  for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
    pushValue(I.getOperand(i), InstID, Vals); // fixed param.

  // Emit type/value pairs for varargs params.
  if (FTy->isVarArg()) {
    for (unsigned i = FTy->getNumParams(), e = II->getNumArgOperands();
         i != e; ++i)
      pushValueAndType(I.getOperand(i), InstID, Vals); // vararg
  }
  break;
}
case Instruction::Resume:
  Code = bitc::FUNC_CODE_INST_RESUME;
  pushValueAndType(I.getOperand(0), InstID, Vals);
  break;
case Instruction::CleanupRet: {
  Code = bitc::FUNC_CODE_INST_CLEANUPRET;
  const auto &CRI = cast<CleanupReturnInst>(I);
  pushValue(CRI.getCleanupPad(), InstID, Vals);
  if (CRI.hasUnwindDest())
    Vals.push_back(VE.getValueID(CRI.getUnwindDest()));
  break;
}
case Instruction::CatchRet: {
  Code = bitc::FUNC_CODE_INST_CATCHRET;
  const auto &CRI = cast<CatchReturnInst>(I);
  pushValue(CRI.getCatchPad(), InstID, Vals);
  Vals.push_back(VE.getValueID(CRI.getSuccessor()));
  break;
}
case Instruction::CleanupPad:
case Instruction::CatchPad: {
  const auto &FuncletPad = cast<FuncletPadInst>(I);
  Code = isa<CatchPadInst>(FuncletPad) ? bitc::FUNC_CODE_INST_CATCHPAD
                                       : bitc::FUNC_CODE_INST_CLEANUPPAD;
  pushValue(FuncletPad.getParentPad(), InstID, Vals);

  unsigned NumArgOperands = FuncletPad.getNumArgOperands();
  Vals.push_back(NumArgOperands);
  for (unsigned Op = 0; Op != NumArgOperands; ++Op)
    pushValueAndType(FuncletPad.getArgOperand(Op), InstID, Vals);
  break;
}
case Instruction::CatchSwitch: {
  Code = bitc::FUNC_CODE_INST_CATCHSWITCH;
  const auto &CatchSwitch = cast<CatchSwitchInst>(I);

  pushValue(CatchSwitch.getParentPad(), InstID, Vals);

  unsigned NumHandlers = CatchSwitch.getNumHandlers();
  Vals.push_back(NumHandlers);
  for (const BasicBlock *CatchPadBB : CatchSwitch.handlers())
    Vals.push_back(VE.getValueID(CatchPadBB));

  if (CatchSwitch.hasUnwindDest())
    Vals.push_back(VE.getValueID(CatchSwitch.getUnwindDest()));
  break;
}
case Instruction::Unreachable:
  Code = bitc::FUNC_CODE_INST_UNREACHABLE;
  AbbrevToUse = FUNCTION_INST_UNREACHABLE_ABBREV;
  break;

case Instruction::PHI: {
  const PHINode &PN = cast<PHINode>(I);
  Code = bitc::FUNC_CODE_INST_PHI;
  // With the newer instruction encoding, forward references could give
  // negative valued IDs.  This is most common for PHIs, so we use
  // signed VBRs.
  SmallVector<uint64_t, 128> Vals64;
  Vals64.push_back(VE.getTypeID(PN.getType()));
  for (unsigned i = 0, e = PN.getNumIncomingValues(); i != e; ++i) {
    pushValueSigned(PN.getIncomingValue(i), InstID, Vals64);
    Vals64.push_back(VE.getValueID(PN.getIncomingBlock(i)));
  }
  // Emit a Vals64 vector and exit.
  Stream.EmitRecord(Code, Vals64, AbbrevToUse);
  Vals64.clear();
  return;
}

case Instruction::LandingPad: {
  const LandingPadInst &LP = cast<LandingPadInst>(I);
  Code = bitc::FUNC_CODE_INST_LANDINGPAD;
  Vals.push_back(VE.getTypeID(LP.getType()));
  Vals.push_back(LP.isCleanup());
  Vals.push_back(LP.getNumClauses());
  for (unsigned I = 0, E = LP.getNumClauses(); I != E; ++I) {
    if (LP.isCatch(I))
      Vals.push_back(LandingPadInst::Catch);
    else
      Vals.push_back(LandingPadInst::Filter);
    pushValueAndType(LP.getClause(I), InstID, Vals);
  }
  break;
}

case Instruction::Alloca: {
  Code = bitc::FUNC_CODE_INST_ALLOCA;
  const AllocaInst &AI = cast<AllocaInst>(I);
  Vals.push_back(VE.getTypeID(AI.getAllocatedType()));
  Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
  Vals.push_back(VE.getValueID(I.getOperand(0))); // size.
  unsigned AlignRecord = Log2_32(AI.getAlignment()) + 1;
  assert(Log2_32(Value::MaximumAlignment) + 1 < 1 << 5 &&(static_cast <bool> (Log2_32(Value::MaximumAlignment) +
< 1 << 5 && "not enough bits for maximum alignment"
) ? void (0) : __assert_fail ("Log2_32(Value::MaximumAlignment) + 1 < 1 << 5 && \"not enough bits for maximum alignment\""
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 2759, __extension__ __PRETTY_FUNCTION__))
         "not enough bits for maximum alignment")(static_cast <bool> (Log2_32(Value::MaximumAlignment) +
< 1 << 5 && "not enough bits for maximum alignment"
) ? void (0) : __assert_fail ("Log2_32(Value::MaximumAlignment) + 1 < 1 << 5 && \"not enough bits for maximum alignment\""
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 2759, __extension__ __PRETTY_FUNCTION__));
  assert(AlignRecord < 1 << 5 && "alignment greater than 1 << 64")(static_cast <bool> (AlignRecord < 1 << 5 &&
 "alignment greater than 1 << 64") ? void (0) : __assert_fail
 ("AlignRecord < 1 << 5 && \"alignment greater than 1 << 64\""
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 2760, __extension__ __PRETTY_FUNCTION__));
  AlignRecord |= AI.isUsedWithInAlloca() << 5;
  AlignRecord |= 1 << 6;
  AlignRecord |= AI.isSwiftError() << 7;
  Vals.push_back(AlignRecord);
  break;
}

case Instruction::Load:
  if (cast<LoadInst>(I).isAtomic()) {
    Code = bitc::FUNC_CODE_INST_LOADATOMIC;
    pushValueAndType(I.getOperand(0), InstID, Vals);
  } else {
    Code = bitc::FUNC_CODE_INST_LOAD;
    if (!pushValueAndType(I.getOperand(0), InstID, Vals)) // ptr
      AbbrevToUse = FUNCTION_INST_LOAD_ABBREV;
  }
  Vals.push_back(VE.getTypeID(I.getType()));
  Vals.push_back(Log2_32(cast<LoadInst>(I).getAlignment())+1);
  Vals.push_back(cast<LoadInst>(I).isVolatile());
  if (cast<LoadInst>(I).isAtomic()) {
    Vals.push_back(getEncodedOrdering(cast<LoadInst>(I).getOrdering()));
    Vals.push_back(getEncodedSyncScopeID(cast<LoadInst>(I).getSyncScopeID()));
  }
  break;
case Instruction::Store:
  if (cast<StoreInst>(I).isAtomic())
    Code = bitc::FUNC_CODE_INST_STOREATOMIC;
  else
    Code = bitc::FUNC_CODE_INST_STORE;
  pushValueAndType(I.getOperand(1), InstID, Vals); // ptrty + ptr
  pushValueAndType(I.getOperand(0), InstID, Vals); // valty + val
  Vals.push_back(Log2_32(cast<StoreInst>(I).getAlignment())+1);
  Vals.push_back(cast<StoreInst>(I).isVolatile());
  if (cast<StoreInst>(I).isAtomic()) {
    Vals.push_back(getEncodedOrdering(cast<StoreInst>(I).getOrdering()));
    Vals.push_back(
        getEncodedSyncScopeID(cast<StoreInst>(I).getSyncScopeID()));
  }
  break;
case Instruction::AtomicCmpXchg:
  Code = bitc::FUNC_CODE_INST_CMPXCHG;
  pushValueAndType(I.getOperand(0), InstID, Vals); // ptrty + ptr
  pushValueAndType(I.getOperand(1), InstID, Vals); // cmp.
  pushValue(I.getOperand(2), InstID, Vals);        // newval.
  Vals.push_back(cast<AtomicCmpXchgInst>(I).isVolatile());
  Vals.push_back(
      getEncodedOrdering(cast<AtomicCmpXchgInst>(I).getSuccessOrdering()));
  Vals.push_back(
      getEncodedSyncScopeID(cast<AtomicCmpXchgInst>(I).getSyncScopeID()));
  Vals.push_back(
      getEncodedOrdering(cast<AtomicCmpXchgInst>(I).getFailureOrdering()));
  Vals.push_back(cast<AtomicCmpXchgInst>(I).isWeak());
  break;
case Instruction::AtomicRMW:
  Code = bitc::FUNC_CODE_INST_ATOMICRMW;
  pushValueAndType(I.getOperand(0), InstID, Vals); // ptrty + ptr
  pushValue(I.getOperand(1), InstID, Vals);        // val.
  Vals.push_back(
      getEncodedRMWOperation(cast<AtomicRMWInst>(I).getOperation()));
  Vals.push_back(cast<AtomicRMWInst>(I).isVolatile());
  Vals.push_back(getEncodedOrdering(cast<AtomicRMWInst>(I).getOrdering()));
  Vals.push_back(
      getEncodedSyncScopeID(cast<AtomicRMWInst>(I).getSyncScopeID()));
  break;
case Instruction::Fence:
  Code = bitc::FUNC_CODE_INST_FENCE;
  Vals.push_back(getEncodedOrdering(cast<FenceInst>(I).getOrdering()));
  Vals.push_back(getEncodedSyncScopeID(cast<FenceInst>(I).getSyncScopeID()));
  break;
case Instruction::Call: {
  const CallInst &CI = cast<CallInst>(I);
  FunctionType *FTy = CI.getFunctionType();

  if (CI.hasOperandBundles())
    writeOperandBundles(&CI, InstID);

  Code = bitc::FUNC_CODE_INST_CALL;

  Vals.push_back(VE.getAttributeListID(CI.getAttributes()));

  unsigned Flags = getOptimizationFlags(&I);
  Vals.push_back(CI.getCallingConv() << bitc::CALL_CCONV |
                 unsigned(CI.isTailCall()) << bitc::CALL_TAIL |
                 unsigned(CI.isMustTailCall()) << bitc::CALL_MUSTTAIL |
                 1 << bitc::CALL_EXPLICIT_TYPE |
                 unsigned(CI.isNoTailCall()) << bitc::CALL_NOTAIL |
                 unsigned(Flags != 0) << bitc::CALL_FMF);
  if (Flags != 0)
    Vals.push_back(Flags);

  Vals.push_back(VE.getTypeID(FTy));
  pushValueAndType(CI.getCalledValue(), InstID, Vals); // Callee

  // Emit value #'s for the fixed parameters.
  for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i) {
    // Check for labels (can happen with asm labels).
    if (FTy->getParamType(i)->isLabelTy())
      Vals.push_back(VE.getValueID(CI.getArgOperand(i)));
    else
      pushValue(CI.getArgOperand(i), InstID, Vals); // fixed param.
  }

  // Emit type/value pairs for varargs params.
  if (FTy->isVarArg()) {
    for (unsigned i = FTy->getNumParams(), e = CI.getNumArgOperands();
         i != e; ++i)
      pushValueAndType(CI.getArgOperand(i), InstID, Vals); // varargs
  }
  break;
}
case Instruction::VAArg:
  Code = bitc::FUNC_CODE_INST_VAARG;
  Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));   // valistty
  pushValue(I.getOperand(0), InstID, Vals);                   // valist.
  Vals.push_back(VE.getTypeID(I.getType())); // restype.
  break;
}

Stream.EmitRecord(Code, Vals, AbbrevToUse);
Vals.clear();
2881}

2883/// Write a GlobalValue VST to the module. The purpose of this data structure is
2884/// to allow clients to efficiently find the function body.
2885void ModuleBitcodeWriter::writeGlobalValueSymbolTable(
DenseMap<const Function *, uint64_t> &FunctionToBitcodeIndex) {
// Get the offset of the VST we are writing, and backpatch it into
// the VST forward declaration record.
uint64_t VSTOffset = Stream.GetCurrentBitNo();
// The BitcodeStartBit was the stream offset of the identification block.
VSTOffset -= bitcodeStartBit();
assert((VSTOffset & 31) == 0 && "VST block not 32-bit aligned")(static_cast <bool> ((VSTOffset & 31) == 0 &&
 "VST block not 32-bit aligned") ? void (0) : __assert_fail (
"(VSTOffset & 31) == 0 && \"VST block not 32-bit aligned\""
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 2892, __extension__ __PRETTY_FUNCTION__));
// Note that we add 1 here because the offset is relative to one word
// before the start of the identification block, which was historically
// always the start of the regular bitcode header.
Stream.BackpatchWord(VSTOffsetPlaceholder, VSTOffset / 32 + 1);

Stream.EnterSubblock(bitc::VALUE_SYMTAB_BLOCK_ID, 4);

auto Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_FNENTRY));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // value id
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // funcoffset
unsigned FnEntryAbbrev = Stream.EmitAbbrev(std::move(Abbv));

for (const Function &F : M) {
  uint64_t Record[2];

  if (F.isDeclaration())
10
←
Assuming the condition is false→
11
←
Taking false branch→
    continue;

  Record[0] = VE.getValueID(&F);

  // Save the word offset of the function (from the start of the
  // actual bitcode written to the stream).
  uint64_t BitcodeIndex = FunctionToBitcodeIndex[&F] - bitcodeStartBit();
  assert((BitcodeIndex & 31) == 0 && "function block not 32-bit aligned")(static_cast <bool> ((BitcodeIndex & 31) == 0 &&
 "function block not 32-bit aligned") ? void (0) : __assert_fail
 ("(BitcodeIndex & 31) == 0 && \"function block not 32-bit aligned\""
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 2917, __extension__ __PRETTY_FUNCTION__));
  // Note that we add 1 here because the offset is relative to one word
  // before the start of the identification block, which was historically
  // always the start of the regular bitcode header.
  Record[1] = BitcodeIndex / 32 + 1;

  Stream.EmitRecord(bitc::VST_CODE_FNENTRY, Record, FnEntryAbbrev);
12
←
Calling 'BitstreamWriter::EmitRecord'→
}

Stream.ExitBlock();
2927}

2929/// Emit names for arguments, instructions and basic blocks in a function.
2930void ModuleBitcodeWriter::writeFunctionLevelValueSymbolTable(
  const ValueSymbolTable &VST) {
if (VST.empty())
  return;

Stream.EnterSubblock(bitc::VALUE_SYMTAB_BLOCK_ID, 4);

// FIXME: Set up the abbrev, we know how many values there are!
// FIXME: We know if the type names can use 7-bit ascii.
SmallVector<uint64_t, 64> NameVals;

for (const ValueName &Name : VST) {
  // Figure out the encoding to use for the name.
  StringEncoding Bits = getStringEncoding(Name.getKey());

  unsigned AbbrevToUse = VST_ENTRY_8_ABBREV;
  NameVals.push_back(VE.getValueID(Name.getValue()));

  // VST_CODE_ENTRY:   [valueid, namechar x N]
  // VST_CODE_BBENTRY: [bbid, namechar x N]
  unsigned Code;
  if (isa<BasicBlock>(Name.getValue())) {
    Code = bitc::VST_CODE_BBENTRY;
    if (Bits == SE_Char6)
      AbbrevToUse = VST_BBENTRY_6_ABBREV;
  } else {
    Code = bitc::VST_CODE_ENTRY;
    if (Bits == SE_Char6)
      AbbrevToUse = VST_ENTRY_6_ABBREV;
    else if (Bits == SE_Fixed7)
      AbbrevToUse = VST_ENTRY_7_ABBREV;
  }

  for (const auto P : Name.getKey())
    NameVals.push_back((unsigned char)P);

  // Emit the finished record.
  Stream.EmitRecord(Code, NameVals, AbbrevToUse);
  NameVals.clear();
}

Stream.ExitBlock();
2972}

2974void ModuleBitcodeWriter::writeUseList(UseListOrder &&Order) {
assert(Order.Shuffle.size() >= 2 && "Shuffle too small")(static_cast <bool> (Order.Shuffle.size() >= 2 &&
 "Shuffle too small") ? void (0) : __assert_fail ("Order.Shuffle.size() >= 2 && \"Shuffle too small\""
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 2975, __extension__ __PRETTY_FUNCTION__));
unsigned Code;
if (isa<BasicBlock>(Order.V))
  Code = bitc::USELIST_CODE_BB;
else
  Code = bitc::USELIST_CODE_DEFAULT;

SmallVector<uint64_t, 64> Record(Order.Shuffle.begin(), Order.Shuffle.end());
Record.push_back(VE.getValueID(Order.V));
Stream.EmitRecord(Code, Record);
2985}

2987void ModuleBitcodeWriter::writeUseListBlock(const Function *F) {
assert(VE.shouldPreserveUseListOrder() &&(static_cast <bool> (VE.shouldPreserveUseListOrder() &&
 "Expected to be preserving use-list order") ? void (0) : __assert_fail
 ("VE.shouldPreserveUseListOrder() && \"Expected to be preserving use-list order\""
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 2989, __extension__ __PRETTY_FUNCTION__))
       "Expected to be preserving use-list order")(static_cast <bool> (VE.shouldPreserveUseListOrder() &&
 "Expected to be preserving use-list order") ? void (0) : __assert_fail
 ("VE.shouldPreserveUseListOrder() && \"Expected to be preserving use-list order\""
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 2989, __extension__ __PRETTY_FUNCTION__));

auto hasMore = [&]() {
  return !VE.UseListOrders.empty() && VE.UseListOrders.back().F == F;
};
if (!hasMore())
  // Nothing to do.
  return;

Stream.EnterSubblock(bitc::USELIST_BLOCK_ID, 3);
while (hasMore()) {
  writeUseList(std::move(VE.UseListOrders.back()));
  VE.UseListOrders.pop_back();
}
Stream.ExitBlock();
3004}

3006/// Emit a function body to the module stream.
3007void ModuleBitcodeWriter::writeFunction(
  const Function &F,
  DenseMap<const Function *, uint64_t> &FunctionToBitcodeIndex) {
// Save the bitcode index of the start of this function block for recording
// in the VST.
FunctionToBitcodeIndex[&F] = Stream.GetCurrentBitNo();

Stream.EnterSubblock(bitc::FUNCTION_BLOCK_ID, 4);
VE.incorporateFunction(F);

SmallVector<unsigned, 64> Vals;

// Emit the number of basic blocks, so the reader can create them ahead of
// time.
Vals.push_back(VE.getBasicBlocks().size());
Stream.EmitRecord(bitc::FUNC_CODE_DECLAREBLOCKS, Vals);
Vals.clear();

// If there are function-local constants, emit them now.
unsigned CstStart, CstEnd;
VE.getFunctionConstantRange(CstStart, CstEnd);
writeConstants(CstStart, CstEnd, false);

// If there is function-local metadata, emit it now.
writeFunctionMetadata(F);

// Keep a running idea of what the instruction ID is.
unsigned InstID = CstEnd;

bool NeedsMetadataAttachment = F.hasMetadata();

DILocation *LastDL = nullptr;
// Finally, emit all the instructions, in order.
for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
  for (BasicBlock::const_iterator I = BB->begin(), E = BB->end();
       I != E; ++I) {
    writeInstruction(*I, InstID, Vals);

    if (!I->getType()->isVoidTy())
      ++InstID;

    // If the instruction has metadata, write a metadata attachment later.
    NeedsMetadataAttachment |= I->hasMetadataOtherThanDebugLoc();

    // If the instruction has a debug location, emit it.
    DILocation *DL = I->getDebugLoc();
    if (!DL)
      continue;

    if (DL == LastDL) {
      // Just repeat the same debug loc as last time.
      Stream.EmitRecord(bitc::FUNC_CODE_DEBUG_LOC_AGAIN, Vals);
      continue;
    }

    Vals.push_back(DL->getLine());
    Vals.push_back(DL->getColumn());
    Vals.push_back(VE.getMetadataOrNullID(DL->getScope()));
    Vals.push_back(VE.getMetadataOrNullID(DL->getInlinedAt()));
    Stream.EmitRecord(bitc::FUNC_CODE_DEBUG_LOC, Vals);
    Vals.clear();

    LastDL = DL;
  }

// Emit names for all the instructions etc.
if (auto *Symtab = F.getValueSymbolTable())
  writeFunctionLevelValueSymbolTable(*Symtab);

if (NeedsMetadataAttachment)
  writeFunctionMetadataAttachment(F);
if (VE.shouldPreserveUseListOrder())
  writeUseListBlock(&F);
VE.purgeFunction();
Stream.ExitBlock();
3082}

3084// Emit blockinfo, which defines the standard abbreviations etc.
3085void ModuleBitcodeWriter::writeBlockInfo() {
// We only want to emit block info records for blocks that have multiple
// instances: CONSTANTS_BLOCK, FUNCTION_BLOCK and VALUE_SYMTAB_BLOCK.
// Other blocks can define their abbrevs inline.
Stream.EnterBlockInfoBlock();

{ // 8-bit fixed-width VST_CODE_ENTRY/VST_CODE_BBENTRY strings.
  auto Abbv = std::make_shared<BitCodeAbbrev>();
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
  if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID, Abbv) !=
      VST_ENTRY_8_ABBREV)
    llvm_unreachable("Unexpected abbrev ordering!")::llvm::llvm_unreachable_internal("Unexpected abbrev ordering!"
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 3099);
}

{ // 7-bit fixed width VST_CODE_ENTRY strings.
  auto Abbv = std::make_shared<BitCodeAbbrev>();
  Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
  if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID, Abbv) !=
      VST_ENTRY_7_ABBREV)
    llvm_unreachable("Unexpected abbrev ordering!")::llvm::llvm_unreachable_internal("Unexpected abbrev ordering!"
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 3110);
}
{ // 6-bit char6 VST_CODE_ENTRY strings.
  auto Abbv = std::make_shared<BitCodeAbbrev>();
  Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_ENTRY));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
  if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID, Abbv) !=
      VST_ENTRY_6_ABBREV)
    llvm_unreachable("Unexpected abbrev ordering!")::llvm::llvm_unreachable_internal("Unexpected abbrev ordering!"
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 3120);
}
{ // 6-bit char6 VST_CODE_BBENTRY strings.
  auto Abbv = std::make_shared<BitCodeAbbrev>();
  Abbv->Add(BitCodeAbbrevOp(bitc::VST_CODE_BBENTRY));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
  if (Stream.EmitBlockInfoAbbrev(bitc::VALUE_SYMTAB_BLOCK_ID, Abbv) !=
      VST_BBENTRY_6_ABBREV)
    llvm_unreachable("Unexpected abbrev ordering!")::llvm::llvm_unreachable_internal("Unexpected abbrev ordering!"
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 3130);
}

{ // SETTYPE abbrev for CONSTANTS_BLOCK.
  auto Abbv = std::make_shared<BitCodeAbbrev>();
  Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_SETTYPE));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
                            VE.computeBitsRequiredForTypeIndicies()));
  if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID, Abbv) !=
      CONSTANTS_SETTYPE_ABBREV)
    llvm_unreachable("Unexpected abbrev ordering!")::llvm::llvm_unreachable_internal("Unexpected abbrev ordering!"
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 3140);
}

{ // INTEGER abbrev for CONSTANTS_BLOCK.
  auto Abbv = std::make_shared<BitCodeAbbrev>();
  Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_INTEGER));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
  if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID, Abbv) !=
      CONSTANTS_INTEGER_ABBREV)
    llvm_unreachable("Unexpected abbrev ordering!")::llvm::llvm_unreachable_internal("Unexpected abbrev ordering!"
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 3149);
}

{ // CE_CAST abbrev for CONSTANTS_BLOCK.
  auto Abbv = std::make_shared<BitCodeAbbrev>();
  Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_CE_CAST));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4));  // cast opc
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,       // typeid
                            VE.computeBitsRequiredForTypeIndicies()));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));    // value id

  if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID, Abbv) !=
      CONSTANTS_CE_CAST_Abbrev)
    llvm_unreachable("Unexpected abbrev ordering!")::llvm::llvm_unreachable_internal("Unexpected abbrev ordering!"
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 3162);
}
{ // NULL abbrev for CONSTANTS_BLOCK.
  auto Abbv = std::make_shared<BitCodeAbbrev>();
  Abbv->Add(BitCodeAbbrevOp(bitc::CST_CODE_NULL));
  if (Stream.EmitBlockInfoAbbrev(bitc::CONSTANTS_BLOCK_ID, Abbv) !=
      CONSTANTS_NULL_Abbrev)
    llvm_unreachable("Unexpected abbrev ordering!")::llvm::llvm_unreachable_internal("Unexpected abbrev ordering!"
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 3169);
}

// FIXME: This should only use space for first class types!

{ // INST_LOAD abbrev for FUNCTION_BLOCK.
  auto Abbv = std::make_shared<BitCodeAbbrev>();
  Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_LOAD));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // Ptr
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,    // dest ty
                            VE.computeBitsRequiredForTypeIndicies()));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4)); // Align
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1)); // volatile
  if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, Abbv) !=
      FUNCTION_INST_LOAD_ABBREV)
    llvm_unreachable("Unexpected abbrev ordering!")::llvm::llvm_unreachable_internal("Unexpected abbrev ordering!"
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 3184);
}
{ // INST_BINOP abbrev for FUNCTION_BLOCK.
  auto Abbv = std::make_shared<BitCodeAbbrev>();
  Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_BINOP));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHS
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // RHS
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
  if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, Abbv) !=
      FUNCTION_INST_BINOP_ABBREV)
    llvm_unreachable("Unexpected abbrev ordering!")::llvm::llvm_unreachable_internal("Unexpected abbrev ordering!"
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 3194);
}
{ // INST_BINOP_FLAGS abbrev for FUNCTION_BLOCK.
  auto Abbv = std::make_shared<BitCodeAbbrev>();
  Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_BINOP));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHS
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // RHS
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8)); // flags
  if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, Abbv) !=
      FUNCTION_INST_BINOP_FLAGS_ABBREV)
    llvm_unreachable("Unexpected abbrev ordering!")::llvm::llvm_unreachable_internal("Unexpected abbrev ordering!"
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 3205);
}
{ // INST_CAST abbrev for FUNCTION_BLOCK.
  auto Abbv = std::make_shared<BitCodeAbbrev>();
  Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_CAST));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));    // OpVal
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,       // dest ty
                            VE.computeBitsRequiredForTypeIndicies()));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4));  // opc
  if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, Abbv) !=
      FUNCTION_INST_CAST_ABBREV)
    llvm_unreachable("Unexpected abbrev ordering!")::llvm::llvm_unreachable_internal("Unexpected abbrev ordering!"
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 3216);
}

{ // INST_RET abbrev for FUNCTION_BLOCK.
  auto Abbv = std::make_shared<BitCodeAbbrev>();
  Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_RET));
  if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, Abbv) !=
      FUNCTION_INST_RET_VOID_ABBREV)
    llvm_unreachable("Unexpected abbrev ordering!")::llvm::llvm_unreachable_internal("Unexpected abbrev ordering!"
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 3224);
}
{ // INST_RET abbrev for FUNCTION_BLOCK.
  auto Abbv = std::make_shared<BitCodeAbbrev>();
  Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_RET));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // ValID
  if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, Abbv) !=
      FUNCTION_INST_RET_VAL_ABBREV)
    llvm_unreachable("Unexpected abbrev ordering!")::llvm::llvm_unreachable_internal("Unexpected abbrev ordering!"
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 3232);
}
{ // INST_UNREACHABLE abbrev for FUNCTION_BLOCK.
  auto Abbv = std::make_shared<BitCodeAbbrev>();
  Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_UNREACHABLE));
  if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, Abbv) !=
      FUNCTION_INST_UNREACHABLE_ABBREV)
    llvm_unreachable("Unexpected abbrev ordering!")::llvm::llvm_unreachable_internal("Unexpected abbrev ordering!"
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 3239);
}
{
  auto Abbv = std::make_shared<BitCodeAbbrev>();
  Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_GEP));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // dest ty
                            Log2_32_Ceil(VE.getTypes().size() + 1)));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
  if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID, Abbv) !=
      FUNCTION_INST_GEP_ABBREV)
    llvm_unreachable("Unexpected abbrev ordering!")::llvm::llvm_unreachable_internal("Unexpected abbrev ordering!"
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 3251);
}

Stream.ExitBlock();
3255}

3257/// Write the module path strings, currently only used when generating
3258/// a combined index file.
3259void IndexBitcodeWriter::writeModStrings() {
Stream.EnterSubblock(bitc::MODULE_STRTAB_BLOCK_ID, 3);

// TODO: See which abbrev sizes we actually need to emit

// 8-bit fixed-width MST_ENTRY strings.
auto Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(bitc::MST_CODE_ENTRY));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8));
unsigned Abbrev8Bit = Stream.EmitAbbrev(std::move(Abbv));

// 7-bit fixed width MST_ENTRY strings.
Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(bitc::MST_CODE_ENTRY));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7));
unsigned Abbrev7Bit = Stream.EmitAbbrev(std::move(Abbv));

// 6-bit char6 MST_ENTRY strings.
Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(bitc::MST_CODE_ENTRY));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
unsigned Abbrev6Bit = Stream.EmitAbbrev(std::move(Abbv));

// Module Hash, 160 bits SHA1. Optionally, emitted after each MST_CODE_ENTRY.
Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(bitc::MST_CODE_HASH));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
unsigned AbbrevHash = Stream.EmitAbbrev(std::move(Abbv));

SmallVector<unsigned, 64> Vals;
forEachModule(
    [&](const StringMapEntry<std::pair<uint64_t, ModuleHash>> &MPSE) {
      StringRef Key = MPSE.getKey();
      const auto &Value = MPSE.getValue();
      StringEncoding Bits = getStringEncoding(Key);
      unsigned AbbrevToUse = Abbrev8Bit;
      if (Bits == SE_Char6)
        AbbrevToUse = Abbrev6Bit;
      else if (Bits == SE_Fixed7)
        AbbrevToUse = Abbrev7Bit;

      Vals.push_back(Value.first);
      Vals.append(Key.begin(), Key.end());

      // Emit the finished record.
      Stream.EmitRecord(bitc::MST_CODE_ENTRY, Vals, AbbrevToUse);

      // Emit an optional hash for the module now
      const auto &Hash = Value.second;
      if (llvm::any_of(Hash, [](uint32_t H) { return H; })) {
        Vals.assign(Hash.begin(), Hash.end());
        // Emit the hash record.
        Stream.EmitRecord(bitc::MST_CODE_HASH, Vals, AbbrevHash);
      }

      Vals.clear();
    });
Stream.ExitBlock();
3327}

3329/// Write the function type metadata related records that need to appear before
3330/// a function summary entry (whether per-module or combined).
3331static void writeFunctionTypeMetadataRecords(BitstreamWriter &Stream,
                                           FunctionSummary *FS) {
if (!FS->type_tests().empty())
  Stream.EmitRecord(bitc::FS_TYPE_TESTS, FS->type_tests());

SmallVector<uint64_t, 64> Record;

auto WriteVFuncIdVec = [&](uint64_t Ty,
                           ArrayRef<FunctionSummary::VFuncId> VFs) {
  if (VFs.empty())
    return;
  Record.clear();
  for (auto &VF : VFs) {
    Record.push_back(VF.GUID);
    Record.push_back(VF.Offset);
  }
  Stream.EmitRecord(Ty, Record);
};

WriteVFuncIdVec(bitc::FS_TYPE_TEST_ASSUME_VCALLS,
                FS->type_test_assume_vcalls());
WriteVFuncIdVec(bitc::FS_TYPE_CHECKED_LOAD_VCALLS,
                FS->type_checked_load_vcalls());

auto WriteConstVCallVec = [&](uint64_t Ty,
                              ArrayRef<FunctionSummary::ConstVCall> VCs) {
  for (auto &VC : VCs) {
    Record.clear();
    Record.push_back(VC.VFunc.GUID);
    Record.push_back(VC.VFunc.Offset);
    Record.insert(Record.end(), VC.Args.begin(), VC.Args.end());
    Stream.EmitRecord(Ty, Record);
  }
};

WriteConstVCallVec(bitc::FS_TYPE_TEST_ASSUME_CONST_VCALL,
                   FS->type_test_assume_const_vcalls());
WriteConstVCallVec(bitc::FS_TYPE_CHECKED_LOAD_CONST_VCALL,
                   FS->type_checked_load_const_vcalls());
3370}

3372static void writeWholeProgramDevirtResolutionByArg(
  SmallVector<uint64_t, 64> &NameVals, const std::vector<uint64_t> &args,
  const WholeProgramDevirtResolution::ByArg &ByArg) {
NameVals.push_back(args.size());
NameVals.insert(NameVals.end(), args.begin(), args.end());

NameVals.push_back(ByArg.TheKind);
NameVals.push_back(ByArg.Info);
NameVals.push_back(ByArg.Byte);
NameVals.push_back(ByArg.Bit);
3382}

3384static void writeWholeProgramDevirtResolution(
  SmallVector<uint64_t, 64> &NameVals, StringTableBuilder &StrtabBuilder,
  uint64_t Id, const WholeProgramDevirtResolution &Wpd) {
NameVals.push_back(Id);

NameVals.push_back(Wpd.TheKind);
NameVals.push_back(StrtabBuilder.add(Wpd.SingleImplName));
NameVals.push_back(Wpd.SingleImplName.size());

NameVals.push_back(Wpd.ResByArg.size());
for (auto &A : Wpd.ResByArg)
  writeWholeProgramDevirtResolutionByArg(NameVals, A.first, A.second);
3396}

3398static void writeTypeIdSummaryRecord(SmallVector<uint64_t, 64> &NameVals,
                                   StringTableBuilder &StrtabBuilder,
                                   const std::string &Id,
                                   const TypeIdSummary &Summary) {
NameVals.push_back(StrtabBuilder.add(Id));
NameVals.push_back(Id.size());

NameVals.push_back(Summary.TTRes.TheKind);
NameVals.push_back(Summary.TTRes.SizeM1BitWidth);
NameVals.push_back(Summary.TTRes.AlignLog2);
NameVals.push_back(Summary.TTRes.SizeM1);
NameVals.push_back(Summary.TTRes.BitMask);
NameVals.push_back(Summary.TTRes.InlineBits);

for (auto &W : Summary.WPDRes)
  writeWholeProgramDevirtResolution(NameVals, StrtabBuilder, W.first,
                                    W.second);
3415}

3417// Helper to emit a single function summary record.
3418void ModuleBitcodeWriterBase::writePerModuleFunctionSummaryRecord(
  SmallVector<uint64_t, 64> &NameVals, GlobalValueSummary *Summary,
  unsigned ValueID, unsigned FSCallsAbbrev, unsigned FSCallsProfileAbbrev,
  const Function &F) {
NameVals.push_back(ValueID);

FunctionSummary *FS = cast<FunctionSummary>(Summary);
writeFunctionTypeMetadataRecords(Stream, FS);

NameVals.push_back(getEncodedGVSummaryFlags(FS->flags()));
NameVals.push_back(FS->instCount());
NameVals.push_back(getEncodedFFlags(FS->fflags()));
NameVals.push_back(FS->refs().size());

for (auto &RI : FS->refs())
  NameVals.push_back(VE.getValueID(RI.getValue()));

bool HasProfileData = F.hasProfileData();
for (auto &ECI : FS->calls()) {
  NameVals.push_back(getValueId(ECI.first));
  if (HasProfileData)
    NameVals.push_back(static_cast<uint8_t>(ECI.second.Hotness));
  else if (WriteRelBFToSummary)
    NameVals.push_back(ECI.second.RelBlockFreq);
}

unsigned FSAbbrev = (HasProfileData ? FSCallsProfileAbbrev : FSCallsAbbrev);
unsigned Code =
    (HasProfileData ? bitc::FS_PERMODULE_PROFILE
                    : (WriteRelBFToSummary ? bitc::FS_PERMODULE_RELBF
                                           : bitc::FS_PERMODULE));

// Emit the finished record.
Stream.EmitRecord(Code, NameVals, FSAbbrev);
NameVals.clear();
3453}

3455// Collect the global value references in the given variable's initializer,
3456// and emit them in a summary record.
3457void ModuleBitcodeWriterBase::writeModuleLevelReferences(
  const GlobalVariable &V, SmallVector<uint64_t, 64> &NameVals,
  unsigned FSModRefsAbbrev) {
auto VI = Index->getValueInfo(GlobalValue::getGUID(V.getName()));
if (!VI || VI.getSummaryList().empty()) {
  // Only declarations should not have a summary (a declaration might however
  // have a summary if the def was in module level asm).
  assert(V.isDeclaration())(static_cast <bool> (V.isDeclaration()) ? void (0) : __assert_fail
 ("V.isDeclaration()", "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 3464, __extension__ __PRETTY_FUNCTION__));
  return;
}
auto *Summary = VI.getSummaryList()[0].get();
NameVals.push_back(VE.getValueID(&V));
GlobalVarSummary *VS = cast<GlobalVarSummary>(Summary);
NameVals.push_back(getEncodedGVSummaryFlags(VS->flags()));

unsigned SizeBeforeRefs = NameVals.size();
for (auto &RI : VS->refs())
  NameVals.push_back(VE.getValueID(RI.getValue()));
// Sort the refs for determinism output, the vector returned by FS->refs() has
// been initialized from a DenseSet.
std::sort(NameVals.begin() + SizeBeforeRefs, NameVals.end());

Stream.EmitRecord(bitc::FS_PERMODULE_GLOBALVAR_INIT_REFS, NameVals,
                  FSModRefsAbbrev);
NameVals.clear();
3482}

3484// Current version for the summary.
3485// This is bumped whenever we introduce changes in the way some record are
3486// interpreted, like flags for instance.
3487static const uint64_t INDEX_VERSION = 4;

3489/// Emit the per-module summary section alongside the rest of
3490/// the module's bitcode.
3491void ModuleBitcodeWriterBase::writePerModuleGlobalValueSummary() {
// By default we compile with ThinLTO if the module has a summary, but the
// client can request full LTO with a module flag.
bool IsThinLTO = true;
if (auto *MD =
        mdconst::extract_or_null<ConstantInt>(M.getModuleFlag("ThinLTO")))
  IsThinLTO = MD->getZExtValue();
Stream.EnterSubblock(IsThinLTO ? bitc::GLOBALVAL_SUMMARY_BLOCK_ID
                               : bitc::FULL_LTO_GLOBALVAL_SUMMARY_BLOCK_ID,
                     4);

Stream.EmitRecord(bitc::FS_VERSION, ArrayRef<uint64_t>{INDEX_VERSION});

if (Index->begin() == Index->end()) {
  Stream.ExitBlock();
  return;
}

for (const auto &GVI : valueIds()) {
  Stream.EmitRecord(bitc::FS_VALUE_GUID,
                    ArrayRef<uint64_t>{GVI.second, GVI.first});
}

// Abbrev for FS_PERMODULE_PROFILE.
auto Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(bitc::FS_PERMODULE_PROFILE));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));   // valueid
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // flags
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));   // instcount
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4));   // fflags
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4));   // numrefs
// numrefs x valueid, n x (valueid, hotness)
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
unsigned FSCallsProfileAbbrev = Stream.EmitAbbrev(std::move(Abbv));

// Abbrev for FS_PERMODULE or FS_PERMODULE_RELBF.
Abbv = std::make_shared<BitCodeAbbrev>();
if (WriteRelBFToSummary)
  Abbv->Add(BitCodeAbbrevOp(bitc::FS_PERMODULE_RELBF));
else
  Abbv->Add(BitCodeAbbrevOp(bitc::FS_PERMODULE));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));   // valueid
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // flags
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));   // instcount
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4));   // fflags
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4));   // numrefs
// numrefs x valueid, n x (valueid [, rel_block_freq])
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
unsigned FSCallsAbbrev = Stream.EmitAbbrev(std::move(Abbv));

// Abbrev for FS_PERMODULE_GLOBALVAR_INIT_REFS.
Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(bitc::FS_PERMODULE_GLOBALVAR_INIT_REFS));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8)); // valueid
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // flags
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));  // valueids
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
unsigned FSModRefsAbbrev = Stream.EmitAbbrev(std::move(Abbv));

// Abbrev for FS_ALIAS.
Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(bitc::FS_ALIAS));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));   // valueid
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // flags
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));   // valueid
unsigned FSAliasAbbrev = Stream.EmitAbbrev(std::move(Abbv));

SmallVector<uint64_t, 64> NameVals;
// Iterate over the list of functions instead of the Index to
// ensure the ordering is stable.
for (const Function &F : M) {
  // Summary emission does not support anonymous functions, they have to
  // renamed using the anonymous function renaming pass.
  if (!F.hasName())
    report_fatal_error("Unexpected anonymous function when writing summary");

  ValueInfo VI = Index->getValueInfo(GlobalValue::getGUID(F.getName()));
  if (!VI || VI.getSummaryList().empty()) {
    // Only declarations should not have a summary (a declaration might
    // however have a summary if the def was in module level asm).
    assert(F.isDeclaration())(static_cast <bool> (F.isDeclaration()) ? void (0) : __assert_fail
 ("F.isDeclaration()", "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 3573, __extension__ __PRETTY_FUNCTION__));
    continue;
  }
  auto *Summary = VI.getSummaryList()[0].get();
  writePerModuleFunctionSummaryRecord(NameVals, Summary, VE.getValueID(&F),
                                      FSCallsAbbrev, FSCallsProfileAbbrev, F);
}

// Capture references from GlobalVariable initializers, which are outside
// of a function scope.
for (const GlobalVariable &G : M.globals())
  writeModuleLevelReferences(G, NameVals, FSModRefsAbbrev);

for (const GlobalAlias &A : M.aliases()) {
  auto *Aliasee = A.getBaseObject();
  if (!Aliasee->hasName())
    // Nameless function don't have an entry in the summary, skip it.
    continue;
  auto AliasId = VE.getValueID(&A);
  auto AliaseeId = VE.getValueID(Aliasee);
  NameVals.push_back(AliasId);
  auto *Summary = Index->getGlobalValueSummary(A);
  AliasSummary *AS = cast<AliasSummary>(Summary);
  NameVals.push_back(getEncodedGVSummaryFlags(AS->flags()));
  NameVals.push_back(AliaseeId);
  Stream.EmitRecord(bitc::FS_ALIAS, NameVals, FSAliasAbbrev);
  NameVals.clear();
}

Stream.ExitBlock();
3603}

3605/// Emit the combined summary section into the combined index file.
3606void IndexBitcodeWriter::writeCombinedGlobalValueSummary() {
Stream.EnterSubblock(bitc::GLOBALVAL_SUMMARY_BLOCK_ID, 3);
Stream.EmitRecord(bitc::FS_VERSION, ArrayRef<uint64_t>{INDEX_VERSION});

// Write the index flags.
uint64_t Flags = 0;
if (Index.withGlobalValueDeadStripping())
  Flags |= 0x1;
if (Index.skipModuleByDistributedBackend())
  Flags |= 0x2;
Stream.EmitRecord(bitc::FS_FLAGS, ArrayRef<uint64_t>{Flags});

for (const auto &GVI : valueIds()) {
  Stream.EmitRecord(bitc::FS_VALUE_GUID,
                    ArrayRef<uint64_t>{GVI.second, GVI.first});
}

// Abbrev for FS_COMBINED.
auto Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(bitc::FS_COMBINED));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));   // valueid
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));   // modid
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // flags
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));   // instcount
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4));   // fflags
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4));   // numrefs
// numrefs x valueid, n x (valueid)
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
unsigned FSCallsAbbrev = Stream.EmitAbbrev(std::move(Abbv));

// Abbrev for FS_COMBINED_PROFILE.
Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(bitc::FS_COMBINED_PROFILE));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));   // valueid
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));   // modid
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // flags
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));   // instcount
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4));   // fflags
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 4));   // numrefs
// numrefs x valueid, n x (valueid, hotness)
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
unsigned FSCallsProfileAbbrev = Stream.EmitAbbrev(std::move(Abbv));

// Abbrev for FS_COMBINED_GLOBALVAR_INIT_REFS.
Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(bitc::FS_COMBINED_GLOBALVAR_INIT_REFS));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));   // valueid
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));   // modid
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // flags
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));    // valueids
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
unsigned FSModRefsAbbrev = Stream.EmitAbbrev(std::move(Abbv));

// Abbrev for FS_COMBINED_ALIAS.
Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(bitc::FS_COMBINED_ALIAS));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));   // valueid
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));   // modid
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));   // flags
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));   // valueid
unsigned FSAliasAbbrev = Stream.EmitAbbrev(std::move(Abbv));

// The aliases are emitted as a post-pass, and will point to the value
// id of the aliasee. Save them in a vector for post-processing.
SmallVector<AliasSummary *, 64> Aliases;

// Save the value id for each summary for alias emission.
DenseMap<const GlobalValueSummary *, unsigned> SummaryToValueIdMap;

SmallVector<uint64_t, 64> NameVals;

// For local linkage, we also emit the original name separately
// immediately after the record.
auto MaybeEmitOriginalName = [&](GlobalValueSummary &S) {
  if (!GlobalValue::isLocalLinkage(S.linkage()))
    return;
  NameVals.push_back(S.getOriginalName());
  Stream.EmitRecord(bitc::FS_COMBINED_ORIGINAL_NAME, NameVals);
  NameVals.clear();
};

forEachSummary([&](GVInfo I, bool IsAliasee) {
  GlobalValueSummary *S = I.second;
  assert(S)(static_cast <bool> (S) ? void (0) : __assert_fail ("S"
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 3691, __extension__ __PRETTY_FUNCTION__));

  auto ValueId = getValueId(I.first);
  assert(ValueId)(static_cast <bool> (ValueId) ? void (0) : __assert_fail
 ("ValueId", "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 3694, __extension__ __PRETTY_FUNCTION__));
  SummaryToValueIdMap[S] = *ValueId;

  // If this is invoked for an aliasee, we want to record the above
  // mapping, but then not emit a summary entry (if the aliasee is
  // to be imported, we will invoke this separately with IsAliasee=false).
  if (IsAliasee)
    return;

  if (auto *AS = dyn_cast<AliasSummary>(S)) {
    // Will process aliases as a post-pass because the reader wants all
    // global to be loaded first.
    Aliases.push_back(AS);
    return;
  }

  if (auto *VS = dyn_cast<GlobalVarSummary>(S)) {
    NameVals.push_back(*ValueId);
    NameVals.push_back(Index.getModuleId(VS->modulePath()));
    NameVals.push_back(getEncodedGVSummaryFlags(VS->flags()));
    for (auto &RI : VS->refs()) {
      auto RefValueId = getValueId(RI.getGUID());
      if (!RefValueId)
        continue;
      NameVals.push_back(*RefValueId);
    }

    // Emit the finished record.
    Stream.EmitRecord(bitc::FS_COMBINED_GLOBALVAR_INIT_REFS, NameVals,
                      FSModRefsAbbrev);
    NameVals.clear();
    MaybeEmitOriginalName(*S);
    return;
  }

  auto *FS = cast<FunctionSummary>(S);
  writeFunctionTypeMetadataRecords(Stream, FS);

  NameVals.push_back(*ValueId);
  NameVals.push_back(Index.getModuleId(FS->modulePath()));
  NameVals.push_back(getEncodedGVSummaryFlags(FS->flags()));
  NameVals.push_back(FS->instCount());
  NameVals.push_back(getEncodedFFlags(FS->fflags()));
  // Fill in below
  NameVals.push_back(0);

  unsigned Count = 0;
  for (auto &RI : FS->refs()) {
    auto RefValueId = getValueId(RI.getGUID());
    if (!RefValueId)
      continue;
    NameVals.push_back(*RefValueId);
    Count++;
  }
  NameVals[5] = Count;

  bool HasProfileData = false;
  for (auto &EI : FS->calls()) {
    HasProfileData |=
        EI.second.getHotness() != CalleeInfo::HotnessType::Unknown;
    if (HasProfileData)
      break;
  }

  for (auto &EI : FS->calls()) {
    // If this GUID doesn't have a value id, it doesn't have a function
    // summary and we don't need to record any calls to it.
    GlobalValue::GUID GUID = EI.first.getGUID();
    auto CallValueId = getValueId(GUID);
    if (!CallValueId) {
      // For SamplePGO, the indirect call targets for local functions will
      // have its original name annotated in profile. We try to find the
      // corresponding PGOFuncName as the GUID.
      GUID = Index.getGUIDFromOriginalID(GUID);
      if (GUID == 0)
        continue;
      CallValueId = getValueId(GUID);
      if (!CallValueId)
        continue;
      // The mapping from OriginalId to GUID may return a GUID
      // that corresponds to a static variable. Filter it out here.
      // This can happen when 
      // 1) There is a call to a library function which does not have
      // a CallValidId;
      // 2) There is a static variable with the  OriginalGUID identical
      // to the GUID of the library function in 1);
      // When this happens, the logic for SamplePGO kicks in and
      // the static variable in 2) will be found, which needs to be
      // filtered out.
      auto *GVSum = Index.getGlobalValueSummary(GUID, false);
      if (GVSum &&
          GVSum->getSummaryKind() == GlobalValueSummary::GlobalVarKind)
        continue;
    }
    NameVals.push_back(*CallValueId);
    if (HasProfileData)
      NameVals.push_back(static_cast<uint8_t>(EI.second.Hotness));
  }

  unsigned FSAbbrev = (HasProfileData ? FSCallsProfileAbbrev : FSCallsAbbrev);
  unsigned Code =
      (HasProfileData ? bitc::FS_COMBINED_PROFILE : bitc::FS_COMBINED);

  // Emit the finished record.
  Stream.EmitRecord(Code, NameVals, FSAbbrev);
  NameVals.clear();
  MaybeEmitOriginalName(*S);
});

for (auto *AS : Aliases) {
  auto AliasValueId = SummaryToValueIdMap[AS];
  assert(AliasValueId)(static_cast <bool> (AliasValueId) ? void (0) : __assert_fail
 ("AliasValueId", "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 3805, __extension__ __PRETTY_FUNCTION__));
  NameVals.push_back(AliasValueId);
  NameVals.push_back(Index.getModuleId(AS->modulePath()));
  NameVals.push_back(getEncodedGVSummaryFlags(AS->flags()));
  auto AliaseeValueId = SummaryToValueIdMap[&AS->getAliasee()];
  assert(AliaseeValueId)(static_cast <bool> (AliaseeValueId) ? void (0) : __assert_fail
 ("AliaseeValueId", "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 3810, __extension__ __PRETTY_FUNCTION__));
  NameVals.push_back(AliaseeValueId);

  // Emit the finished record.
  Stream.EmitRecord(bitc::FS_COMBINED_ALIAS, NameVals, FSAliasAbbrev);
  NameVals.clear();
  MaybeEmitOriginalName(*AS);
}

if (!Index.cfiFunctionDefs().empty()) {
  for (auto &S : Index.cfiFunctionDefs()) {
    NameVals.push_back(StrtabBuilder.add(S));
    NameVals.push_back(S.size());
  }
  Stream.EmitRecord(bitc::FS_CFI_FUNCTION_DEFS, NameVals);
  NameVals.clear();
}

if (!Index.cfiFunctionDecls().empty()) {
  for (auto &S : Index.cfiFunctionDecls()) {
    NameVals.push_back(StrtabBuilder.add(S));
    NameVals.push_back(S.size());
  }
  Stream.EmitRecord(bitc::FS_CFI_FUNCTION_DECLS, NameVals);
  NameVals.clear();
}

if (!Index.typeIds().empty()) {
  for (auto &S : Index.typeIds()) {
    writeTypeIdSummaryRecord(NameVals, StrtabBuilder, S.first, S.second);
    Stream.EmitRecord(bitc::FS_TYPE_ID, NameVals);
    NameVals.clear();
  }
}

Stream.ExitBlock();
3846}

3848/// Create the "IDENTIFICATION_BLOCK_ID" containing a single string with the
3849/// current llvm version, and a record for the epoch number.
3850static void writeIdentificationBlock(BitstreamWriter &Stream) {
Stream.EnterSubblock(bitc::IDENTIFICATION_BLOCK_ID, 5);

// Write the "user readable" string identifying the bitcode producer
auto Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(bitc::IDENTIFICATION_CODE_STRING));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Char6));
auto StringAbbrev = Stream.EmitAbbrev(std::move(Abbv));
writeStringRecord(Stream, bitc::IDENTIFICATION_CODE_STRING,
                  "LLVM" LLVM_VERSION_STRING"7.0.0", StringAbbrev);

// Write the epoch version
Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(bitc::IDENTIFICATION_CODE_EPOCH));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
auto EpochAbbrev = Stream.EmitAbbrev(std::move(Abbv));
SmallVector<unsigned, 1> Vals = {bitc::BITCODE_CURRENT_EPOCH};
Stream.EmitRecord(bitc::IDENTIFICATION_CODE_EPOCH, Vals, EpochAbbrev);
Stream.ExitBlock();
3870}

3872void ModuleBitcodeWriter::writeModuleHash(size_t BlockStartPos) {
// Emit the module's hash.
// MODULE_CODE_HASH: [5*i32]
if (GenerateHash) {
  uint32_t Vals[5];
  Hasher.update(ArrayRef<uint8_t>((const uint8_t *)&(Buffer)[BlockStartPos],
                                  Buffer.size() - BlockStartPos));
  StringRef Hash = Hasher.result();
  for (int Pos = 0; Pos < 20; Pos += 4) {
    Vals[Pos / 4] = support::endian::read32be(Hash.data() + Pos);
  }

  // Emit the finished record.
  Stream.EmitRecord(bitc::MODULE_CODE_HASH, Vals);

  if (ModHash)
    // Save the written hash value.
    std::copy(std::begin(Vals), std::end(Vals), std::begin(*ModHash));
}
3891}

3893void ModuleBitcodeWriter::write() {
writeIdentificationBlock(Stream);

Stream.EnterSubblock(bitc::MODULE_BLOCK_ID, 3);
size_t BlockStartPos = Buffer.size();

writeModuleVersion();

// Emit blockinfo, which defines the standard abbreviations etc.
writeBlockInfo();

// Emit information about attribute groups.
writeAttributeGroupTable();

// Emit information about parameter attributes.
writeAttributeTable();

// Emit information describing all of the types in the module.
writeTypeTable();

writeComdats();

// Emit top-level description of module, including target triple, inline asm,
// descriptors for global variables, and function prototype info.
writeModuleInfo();

// Emit constants.
writeModuleConstants();

// Emit metadata kind names.
writeModuleMetadataKinds();

// Emit metadata.
writeModuleMetadata();

// Emit module-level use-lists.
if (VE.shouldPreserveUseListOrder())
4
←
Assuming the condition is false→
5
←
Taking false branch→
  writeUseListBlock(nullptr);

writeOperandBundleTags();
writeSyncScopeNames();

// Emit function bodies.
DenseMap<const Function *, uint64_t> FunctionToBitcodeIndex;
for (Module::const_iterator F = M.begin(), E = M.end(); F != E; ++F)
6
←
Loop condition is false. Execution continues on line 3943→
  if (!F->isDeclaration())
    writeFunction(*F, FunctionToBitcodeIndex);

// Need to write after the above call to WriteFunction which populates
// the summary information in the index.
if (Index)
7
←
Assuming the condition is false→
8
←
Taking false branch→
  writePerModuleGlobalValueSummary();

writeGlobalValueSymbolTable(FunctionToBitcodeIndex);
9
←
Calling 'ModuleBitcodeWriter::writeGlobalValueSymbolTable'→

writeModuleHash(BlockStartPos);

Stream.ExitBlock();
3951}

3953static void writeInt32ToBuffer(uint32_t Value, SmallVectorImpl<char> &Buffer,
                             uint32_t &Position) {
support::endian::write32le(&Buffer[Position], Value);
Position += 4;
3957}

3959/// If generating a bc file on darwin, we have to emit a
3960/// header and trailer to make it compatible with the system archiver.  To do
3961/// this we emit the following header, and then emit a trailer that pads the
3962/// file out to be a multiple of 16 bytes.
3963///
3964/// struct bc_header {
3965///   uint32_t Magic;         // 0x0B17C0DE
3966///   uint32_t Version;       // Version, currently always 0.
3967///   uint32_t BitcodeOffset; // Offset to traditional bitcode file.
3968///   uint32_t BitcodeSize;   // Size of traditional bitcode file.
3969///   uint32_t CPUType;       // CPU specifier.
3970///   ... potentially more later ...
3971/// };
3972static void emitDarwinBCHeaderAndTrailer(SmallVectorImpl<char> &Buffer,
                                       const Triple &TT) {
unsigned CPUType = ~0U;

// Match x86_64-*, i[3-9]86-*, powerpc-*, powerpc64-*, arm-*, thumb-*,
// armv[0-9]-*, thumbv[0-9]-*, armv5te-*, or armv6t2-*. The CPUType is a magic
// number from /usr/include/mach/machine.h.  It is ok to reproduce the
// specific constants here because they are implicitly part of the Darwin ABI.
enum {
  DARWIN_CPU_ARCH_ABI64      = 0x01000000,
  DARWIN_CPU_TYPE_X86        = 7,
  DARWIN_CPU_TYPE_ARM        = 12,
  DARWIN_CPU_TYPE_POWERPC    = 18
};

Triple::ArchType Arch = TT.getArch();
if (Arch == Triple::x86_64)
  CPUType = DARWIN_CPU_TYPE_X86 | DARWIN_CPU_ARCH_ABI64;
else if (Arch == Triple::x86)
  CPUType = DARWIN_CPU_TYPE_X86;
else if (Arch == Triple::ppc)
  CPUType = DARWIN_CPU_TYPE_POWERPC;
else if (Arch == Triple::ppc64)
  CPUType = DARWIN_CPU_TYPE_POWERPC | DARWIN_CPU_ARCH_ABI64;
else if (Arch == Triple::arm || Arch == Triple::thumb)
  CPUType = DARWIN_CPU_TYPE_ARM;

// Traditional Bitcode starts after header.
assert(Buffer.size() >= BWH_HeaderSize &&(static_cast <bool> (Buffer.size() >= BWH_HeaderSize
 && "Expected header size to be reserved") ? void (0)
 : __assert_fail ("Buffer.size() >= BWH_HeaderSize && \"Expected header size to be reserved\""
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 4001, __extension__ __PRETTY_FUNCTION__))
       "Expected header size to be reserved")(static_cast <bool> (Buffer.size() >= BWH_HeaderSize
 && "Expected header size to be reserved") ? void (0)
 : __assert_fail ("Buffer.size() >= BWH_HeaderSize && \"Expected header size to be reserved\""
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 4001, __extension__ __PRETTY_FUNCTION__));
unsigned BCOffset = BWH_HeaderSize;
unsigned BCSize = Buffer.size() - BWH_HeaderSize;

// Write the magic and version.
unsigned Position = 0;
writeInt32ToBuffer(0x0B17C0DE, Buffer, Position);
writeInt32ToBuffer(0, Buffer, Position); // Version.
writeInt32ToBuffer(BCOffset, Buffer, Position);
writeInt32ToBuffer(BCSize, Buffer, Position);
writeInt32ToBuffer(CPUType, Buffer, Position);

// If the file is not a multiple of 16 bytes, insert dummy padding.
while (Buffer.size() & 15)
  Buffer.push_back(0);
4016}

4018/// Helper to write the header common to all bitcode files.
4019static void writeBitcodeHeader(BitstreamWriter &Stream) {
// Emit the file header.
Stream.Emit((unsigned)'B', 8);
Stream.Emit((unsigned)'C', 8);
Stream.Emit(0x0, 4);
Stream.Emit(0xC, 4);
Stream.Emit(0xE, 4);
Stream.Emit(0xD, 4);
4027}

4029BitcodeWriter::BitcodeWriter(SmallVectorImpl<char> &Buffer)
  : Buffer(Buffer), Stream(new BitstreamWriter(Buffer)) {
writeBitcodeHeader(*Stream);
4032}

4034BitcodeWriter::~BitcodeWriter() { assert(WroteStrtab)(static_cast <bool> (WroteStrtab) ? void (0) : __assert_fail
 ("WroteStrtab", "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 4034, __extension__ __PRETTY_FUNCTION__)); }

4036void BitcodeWriter::writeBlob(unsigned Block, unsigned Record, StringRef Blob) {
Stream->EnterSubblock(Block, 3);

auto Abbv = std::make_shared<BitCodeAbbrev>();
Abbv->Add(BitCodeAbbrevOp(Record));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob));
auto AbbrevNo = Stream->EmitAbbrev(std::move(Abbv));

Stream->EmitRecordWithBlob(AbbrevNo, ArrayRef<uint64_t>{Record}, Blob);

Stream->ExitBlock();
4047}

4049void BitcodeWriter::writeSymtab() {
assert(!WroteStrtab && !WroteSymtab)(static_cast <bool> (!WroteStrtab && !WroteSymtab
) ? void (0) : __assert_fail ("!WroteStrtab && !WroteSymtab"
, "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 4050, __extension__ __PRETTY_FUNCTION__));

// If any module has module-level inline asm, we will require a registered asm
// parser for the target so that we can create an accurate symbol table for
// the module.
for (Module *M : Mods) {
  if (M->getModuleInlineAsm().empty())
    continue;

  std::string Err;
  const Triple TT(M->getTargetTriple());
  const Target *T = TargetRegistry::lookupTarget(TT.str(), Err);
  if (!T || !T->hasMCAsmParser())
    return;
}

WroteSymtab = true;
SmallVector<char, 0> Symtab;
// The irsymtab::build function may be unable to create a symbol table if the
// module is malformed (e.g. it contains an invalid alias). Writing a symbol
// table is not required for correctness, but we still want to be able to
// write malformed modules to bitcode files, so swallow the error.
if (Error E = irsymtab::build(Mods, Symtab, StrtabBuilder, Alloc)) {
  consumeError(std::move(E));
  return;
}

writeBlob(bitc::SYMTAB_BLOCK_ID, bitc::SYMTAB_BLOB,
          {Symtab.data(), Symtab.size()});
4079}

4081void BitcodeWriter::writeStrtab() {
assert(!WroteStrtab)(static_cast <bool> (!WroteStrtab) ? void (0) : __assert_fail
 ("!WroteStrtab", "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 4082, __extension__ __PRETTY_FUNCTION__));

std::vector<char> Strtab;
StrtabBuilder.finalizeInOrder();
Strtab.resize(StrtabBuilder.getSize());
StrtabBuilder.write((uint8_t *)Strtab.data());

writeBlob(bitc::STRTAB_BLOCK_ID, bitc::STRTAB_BLOB,
          {Strtab.data(), Strtab.size()});

WroteStrtab = true;
4093}

4095void BitcodeWriter::copyStrtab(StringRef Strtab) {
writeBlob(bitc::STRTAB_BLOCK_ID, bitc::STRTAB_BLOB, Strtab);
WroteStrtab = true;
4098}

4100void BitcodeWriter::writeModule(const Module &M,
                              bool ShouldPreserveUseListOrder,
                              const ModuleSummaryIndex *Index,
                              bool GenerateHash, ModuleHash *ModHash) {
assert(!WroteStrtab)(static_cast <bool> (!WroteStrtab) ? void (0) : __assert_fail
 ("!WroteStrtab", "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 4104, __extension__ __PRETTY_FUNCTION__));

// The Mods vector is used by irsymtab::build, which requires non-const
// Modules in case it needs to materialize metadata. But the bitcode writer
// requires that the module is materialized, so we can cast to non-const here,
// after checking that it is in fact materialized.
assert(M.isMaterialized())(static_cast <bool> (M.isMaterialized()) ? void (0) : __assert_fail
 ("M.isMaterialized()", "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 4110, __extension__ __PRETTY_FUNCTION__));
Mods.push_back(const_cast<Module *>(&M));

ModuleBitcodeWriter ModuleWriter(M, Buffer, StrtabBuilder, *Stream,
                                 ShouldPreserveUseListOrder, Index,
                                 GenerateHash, ModHash);
ModuleWriter.write();
3
←
Calling 'ModuleBitcodeWriter::write'→
4117}

4119void BitcodeWriter::writeIndex(
  const ModuleSummaryIndex *Index,
  const std::map<std::string, GVSummaryMapTy> *ModuleToSummariesForIndex) {
IndexBitcodeWriter IndexWriter(*Stream, StrtabBuilder, *Index,
                               ModuleToSummariesForIndex);
IndexWriter.write();
4125}

4127/// Write the specified module to the specified output stream.
4128void llvm::WriteBitcodeToFile(const Module &M, raw_ostream &Out,
                            bool ShouldPreserveUseListOrder,
                            const ModuleSummaryIndex *Index,
                            bool GenerateHash, ModuleHash *ModHash) {
SmallVector<char, 0> Buffer;
Buffer.reserve(256*1024);

// If this is darwin or another generic macho target, reserve space for the
// header.
Triple TT(M.getTargetTriple());
if (TT.isOSDarwin() || TT.isOSBinFormatMachO())
1
Taking false branch→
  Buffer.insert(Buffer.begin(), BWH_HeaderSize, 0);

BitcodeWriter Writer(Buffer);
Writer.writeModule(M, ShouldPreserveUseListOrder, Index, GenerateHash,
2
←
Calling 'BitcodeWriter::writeModule'→
                   ModHash);
Writer.writeSymtab();
Writer.writeStrtab();

if (TT.isOSDarwin() || TT.isOSBinFormatMachO())
  emitDarwinBCHeaderAndTrailer(Buffer, TT);

// Write the generated bitstream to "Out".
Out.write((char*)&Buffer.front(), Buffer.size());
4152}

4154void IndexBitcodeWriter::write() {
Stream.EnterSubblock(bitc::MODULE_BLOCK_ID, 3);

writeModuleVersion();

// Write the module paths in the combined index.
writeModStrings();

// Write the summary combined index records.
writeCombinedGlobalValueSummary();

Stream.ExitBlock();
4166}

4168// Write the specified module summary index to the given raw output stream,
4169// where it will be written in a new bitcode block. This is used when
4170// writing the combined index file for ThinLTO. When writing a subset of the
4171// index for a distributed backend, provide a \p ModuleToSummariesForIndex map.
4172void llvm::WriteIndexToFile(
  const ModuleSummaryIndex &Index, raw_ostream &Out,
  const std::map<std::string, GVSummaryMapTy> *ModuleToSummariesForIndex) {
SmallVector<char, 0> Buffer;
Buffer.reserve(256 * 1024);

BitcodeWriter Writer(Buffer);
Writer.writeIndex(&Index, ModuleToSummariesForIndex);
Writer.writeStrtab();

Out.write((char *)&Buffer.front(), Buffer.size());
4183}

4185namespace {

4187/// Class to manage the bitcode writing for a thin link bitcode file.
4188class ThinLinkBitcodeWriter : public ModuleBitcodeWriterBase {
/// ModHash is for use in ThinLTO incremental build, generated while writing
/// the module bitcode file.
const ModuleHash *ModHash;

4193public:
ThinLinkBitcodeWriter(const Module &M, StringTableBuilder &StrtabBuilder,
                      BitstreamWriter &Stream,
                      const ModuleSummaryIndex &Index,
                      const ModuleHash &ModHash)
    : ModuleBitcodeWriterBase(M, StrtabBuilder, Stream,
                              /*ShouldPreserveUseListOrder=*/false, &Index),
      ModHash(&ModHash) {}

void write();

4204private:
void writeSimplifiedModuleInfo();
4206};

4208} // end anonymous namespace

4210// This function writes a simpilified module info for thin link bitcode file.
4211// It only contains the source file name along with the name(the offset and
4212// size in strtab) and linkage for global values. For the global value info
4213// entry, in order to keep linkage at offset 5, there are three zeros used
4214// as padding.
4215void ThinLinkBitcodeWriter::writeSimplifiedModuleInfo() {
SmallVector<unsigned, 64> Vals;
// Emit the module's source file name.
{
  StringEncoding Bits = getStringEncoding(M.getSourceFileName());
  BitCodeAbbrevOp AbbrevOpToUse = BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8);
  if (Bits == SE_Char6)
    AbbrevOpToUse = BitCodeAbbrevOp(BitCodeAbbrevOp::Char6);
  else if (Bits == SE_Fixed7)
    AbbrevOpToUse = BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 7);

  // MODULE_CODE_SOURCE_FILENAME: [namechar x N]
  auto Abbv = std::make_shared<BitCodeAbbrev>();
  Abbv->Add(BitCodeAbbrevOp(bitc::MODULE_CODE_SOURCE_FILENAME));
  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
  Abbv->Add(AbbrevOpToUse);
  unsigned FilenameAbbrev = Stream.EmitAbbrev(std::move(Abbv));

  for (const auto P : M.getSourceFileName())
    Vals.push_back((unsigned char)P);

  Stream.EmitRecord(bitc::MODULE_CODE_SOURCE_FILENAME, Vals, FilenameAbbrev);
  Vals.clear();
}

// Emit the global variable information.
for (const GlobalVariable &GV : M.globals()) {
  // GLOBALVAR: [strtab offset, strtab size, 0, 0, 0, linkage]
  Vals.push_back(StrtabBuilder.add(GV.getName()));
  Vals.push_back(GV.getName().size());
  Vals.push_back(0);
  Vals.push_back(0);
  Vals.push_back(0);
  Vals.push_back(getEncodedLinkage(GV));

  Stream.EmitRecord(bitc::MODULE_CODE_GLOBALVAR, Vals);
  Vals.clear();
}

// Emit the function proto information.
for (const Function &F : M) {
  // FUNCTION:  [strtab offset, strtab size, 0, 0, 0, linkage]
  Vals.push_back(StrtabBuilder.add(F.getName()));
  Vals.push_back(F.getName().size());
  Vals.push_back(0);
  Vals.push_back(0);
  Vals.push_back(0);
  Vals.push_back(getEncodedLinkage(F));

  Stream.EmitRecord(bitc::MODULE_CODE_FUNCTION, Vals);
  Vals.clear();
}

// Emit the alias information.
for (const GlobalAlias &A : M.aliases()) {
  // ALIAS: [strtab offset, strtab size, 0, 0, 0, linkage]
  Vals.push_back(StrtabBuilder.add(A.getName()));
  Vals.push_back(A.getName().size());
  Vals.push_back(0);
  Vals.push_back(0);
  Vals.push_back(0);
  Vals.push_back(getEncodedLinkage(A));

  Stream.EmitRecord(bitc::MODULE_CODE_ALIAS, Vals);
  Vals.clear();
}

// Emit the ifunc information.
for (const GlobalIFunc &I : M.ifuncs()) {
  // IFUNC: [strtab offset, strtab size, 0, 0, 0, linkage]
  Vals.push_back(StrtabBuilder.add(I.getName()));
  Vals.push_back(I.getName().size());
  Vals.push_back(0);
  Vals.push_back(0);
  Vals.push_back(0);
  Vals.push_back(getEncodedLinkage(I));

  Stream.EmitRecord(bitc::MODULE_CODE_IFUNC, Vals);
  Vals.clear();
}
4295}

4297void ThinLinkBitcodeWriter::write() {
Stream.EnterSubblock(bitc::MODULE_BLOCK_ID, 3);

writeModuleVersion();

writeSimplifiedModuleInfo();

writePerModuleGlobalValueSummary();

// Write module hash.
Stream.EmitRecord(bitc::MODULE_CODE_HASH, ArrayRef<uint32_t>(*ModHash));

Stream.ExitBlock();
4310}

4312void BitcodeWriter::writeThinLinkBitcode(const Module &M,
                                       const ModuleSummaryIndex &Index,
                                       const ModuleHash &ModHash) {
assert(!WroteStrtab)(static_cast <bool> (!WroteStrtab) ? void (0) : __assert_fail
 ("!WroteStrtab", "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 4315, __extension__ __PRETTY_FUNCTION__));

// The Mods vector is used by irsymtab::build, which requires non-const
// Modules in case it needs to materialize metadata. But the bitcode writer
// requires that the module is materialized, so we can cast to non-const here,
// after checking that it is in fact materialized.
assert(M.isMaterialized())(static_cast <bool> (M.isMaterialized()) ? void (0) : __assert_fail
 ("M.isMaterialized()", "/build/llvm-toolchain-snapshot-7~svn326425/lib/Bitcode/Writer/BitcodeWriter.cpp"
, 4321, __extension__ __PRETTY_FUNCTION__));
Mods.push_back(const_cast<Module *>(&M));

ThinLinkBitcodeWriter ThinLinkWriter(M, StrtabBuilder, *Stream, Index,
                                     ModHash);
ThinLinkWriter.write();
4327}

4329// Write the specified thin link bitcode file to the given raw output stream,
4330// where it will be written in a new bitcode block. This is used when
4331// writing the per-module index file for ThinLTO.
4332void llvm::WriteThinLinkBitcodeToFile(const Module &M, raw_ostream &Out,
                                    const ModuleSummaryIndex &Index,
                                    const ModuleHash &ModHash) {
SmallVector<char, 0> Buffer;
Buffer.reserve(256 * 1024);

BitcodeWriter Writer(Buffer);
Writer.writeThinLinkBitcode(M, Index, ModHash);
Writer.writeSymtab();
Writer.writeStrtab();

Out.write((char *)&Buffer.front(), Buffer.size());
4344}

←

/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h

1//===- BitstreamWriter.h - Low-level bitstream writer interface -*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This header defines the BitstreamWriter class.  This class can be used to
11// write an arbitrary bitstream, regardless of its contents.
12//
13//===----------------------------------------------------------------------===//

15#ifndef LLVM_BITCODE_BITSTREAMWRITER_H
16#define LLVM_BITCODE_BITSTREAMWRITER_H

18#include "llvm/ADT/ArrayRef.h"
19#include "llvm/ADT/Optional.h"
20#include "llvm/ADT/SmallVector.h"
21#include "llvm/ADT/StringRef.h"
22#include "llvm/Bitcode/BitCodes.h"
23#include "llvm/Support/Endian.h"
24#include <vector>

26namespace llvm {

28class BitstreamWriter {
SmallVectorImpl<char> &Out;

/// CurBit - Always between 0 and 31 inclusive, specifies the next bit to use.
unsigned CurBit;

/// CurValue - The current value.  Only bits < CurBit are valid.
uint32_t CurValue;

/// CurCodeSize - This is the declared size of code values used for the
/// current block, in bits.
unsigned CurCodeSize;

/// BlockInfoCurBID - When emitting a BLOCKINFO_BLOCK, this is the currently
/// selected BLOCK ID.
unsigned BlockInfoCurBID;

/// CurAbbrevs - Abbrevs installed at in this block.
std::vector<std::shared_ptr<BitCodeAbbrev>> CurAbbrevs;

struct Block {
  unsigned PrevCodeSize;
  size_t StartSizeWord;
  std::vector<std::shared_ptr<BitCodeAbbrev>> PrevAbbrevs;
  Block(unsigned PCS, size_t SSW) : PrevCodeSize(PCS), StartSizeWord(SSW) {}
};

/// BlockScope - This tracks the current blocks that we have entered.
std::vector<Block> BlockScope;

/// BlockInfo - This contains information emitted to BLOCKINFO_BLOCK blocks.
/// These describe abbreviations that all blocks of the specified ID inherit.
struct BlockInfo {
  unsigned BlockID;
  std::vector<std::shared_ptr<BitCodeAbbrev>> Abbrevs;
};
std::vector<BlockInfo> BlockInfoRecords;

void WriteByte(unsigned char Value) {
  Out.push_back(Value);
}

void WriteWord(unsigned Value) {
  Value = support::endian::byte_swap<uint32_t, support::little>(Value);
  Out.append(reinterpret_cast<const char *>(&Value),
             reinterpret_cast<const char *>(&Value + 1));
}

size_t GetBufferOffset() const { return Out.size(); }

size_t GetWordIndex() const {
  size_t Offset = GetBufferOffset();
  assert((Offset & 3) == 0 && "Not 32-bit aligned")(static_cast <bool> ((Offset & 3) == 0 && "Not 32-bit aligned"
) ? void (0) : __assert_fail ("(Offset & 3) == 0 && \"Not 32-bit aligned\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 80, __extension__ __PRETTY_FUNCTION__));
  return Offset / 4;
}

84public:
explicit BitstreamWriter(SmallVectorImpl<char> &O)
  : Out(O), CurBit(0), CurValue(0), CurCodeSize(2) {}

~BitstreamWriter() {
  assert(CurBit == 0 && "Unflushed data remaining")(static_cast <bool> (CurBit == 0 && "Unflushed data remaining"
) ? void (0) : __assert_fail ("CurBit == 0 && \"Unflushed data remaining\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 89, __extension__ __PRETTY_FUNCTION__));
  assert(BlockScope.empty() && CurAbbrevs.empty() && "Block imbalance")(static_cast <bool> (BlockScope.empty() && CurAbbrevs
.empty() && "Block imbalance") ? void (0) : __assert_fail
 ("BlockScope.empty() && CurAbbrevs.empty() && \"Block imbalance\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 90, __extension__ __PRETTY_FUNCTION__));
}

/// \brief Retrieve the current position in the stream, in bits.
uint64_t GetCurrentBitNo() const { return GetBufferOffset() * 8 + CurBit; }

/// \brief Retrieve the number of bits currently used to encode an abbrev ID.
unsigned GetAbbrevIDWidth() const { return CurCodeSize; }

//===--------------------------------------------------------------------===//
// Basic Primitives for emitting bits to the stream.
//===--------------------------------------------------------------------===//

/// Backpatch a 32-bit word in the output at the given bit offset
/// with the specified value.
void BackpatchWord(uint64_t BitNo, unsigned NewWord) {
  using namespace llvm::support;
  unsigned ByteNo = BitNo / 8;
  assert((!endian::readAtBitAlignment<uint32_t, little, unaligned>((static_cast <bool> ((!endian::readAtBitAlignment<uint32_t
, little, unaligned>( &Out[ByteNo], BitNo & 7)) &&
 "Expected to be patching over 0-value placeholders") ? void (
0) : __assert_fail ("(!endian::readAtBitAlignment<uint32_t, little, unaligned>( &Out[ByteNo], BitNo & 7)) && \"Expected to be patching over 0-value placeholders\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 110, __extension__ __PRETTY_FUNCTION__))
             &Out[ByteNo], BitNo & 7)) &&(static_cast <bool> ((!endian::readAtBitAlignment<uint32_t
, little, unaligned>( &Out[ByteNo], BitNo & 7)) &&
 "Expected to be patching over 0-value placeholders") ? void (
0) : __assert_fail ("(!endian::readAtBitAlignment<uint32_t, little, unaligned>( &Out[ByteNo], BitNo & 7)) && \"Expected to be patching over 0-value placeholders\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 110, __extension__ __PRETTY_FUNCTION__))
         "Expected to be patching over 0-value placeholders")(static_cast <bool> ((!endian::readAtBitAlignment<uint32_t
, little, unaligned>( &Out[ByteNo], BitNo & 7)) &&
 "Expected to be patching over 0-value placeholders") ? void (
0) : __assert_fail ("(!endian::readAtBitAlignment<uint32_t, little, unaligned>( &Out[ByteNo], BitNo & 7)) && \"Expected to be patching over 0-value placeholders\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 110, __extension__ __PRETTY_FUNCTION__));
  endian::writeAtBitAlignment<uint32_t, little, unaligned>(
      &Out[ByteNo], NewWord, BitNo & 7);
}

void BackpatchWord64(uint64_t BitNo, uint64_t Val) {
  BackpatchWord(BitNo, (uint32_t)Val);
  BackpatchWord(BitNo + 32, (uint32_t)(Val >> 32));
}

void Emit(uint32_t Val, unsigned NumBits) {
  assert(NumBits && NumBits <= 32 && "Invalid value size!")(static_cast <bool> (NumBits && NumBits <= 32
 && "Invalid value size!") ? void (0) : __assert_fail
 ("NumBits && NumBits <= 32 && \"Invalid value size!\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 121, __extension__ __PRETTY_FUNCTION__));
  assert((Val & ~(~0U >> (32-NumBits))) == 0 && "High bits set!")(static_cast <bool> ((Val & ~(~0U >> (32-NumBits
))) == 0 && "High bits set!") ? void (0) : __assert_fail
 ("(Val & ~(~0U >> (32-NumBits))) == 0 && \"High bits set!\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 122, __extension__ __PRETTY_FUNCTION__));
  CurValue |= Val << CurBit;
  if (CurBit + NumBits < 32) {
    CurBit += NumBits;
    return;
  }

  // Add the current word.
  WriteWord(CurValue);

  if (CurBit)
    CurValue = Val >> (32-CurBit);
  else
    CurValue = 0;
  CurBit = (CurBit+NumBits) & 31;
}

void FlushToWord() {
  if (CurBit) {
    WriteWord(CurValue);
    CurBit = 0;
    CurValue = 0;
  }
}

void EmitVBR(uint32_t Val, unsigned NumBits) {
  assert(NumBits <= 32 && "Too many bits to emit!")(static_cast <bool> (NumBits <= 32 && "Too many bits to emit!"
) ? void (0) : __assert_fail ("NumBits <= 32 && \"Too many bits to emit!\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 148, __extension__ __PRETTY_FUNCTION__));
  uint32_t Threshold = 1U << (NumBits-1);

  // Emit the bits with VBR encoding, NumBits-1 bits at a time.
  while (Val >= Threshold) {
    Emit((Val & ((1 << (NumBits-1))-1)) | (1 << (NumBits-1)), NumBits);
    Val >>= NumBits-1;
  }

  Emit(Val, NumBits);
}

void EmitVBR64(uint64_t Val, unsigned NumBits) {
  assert(NumBits <= 32 && "Too many bits to emit!")(static_cast <bool> (NumBits <= 32 && "Too many bits to emit!"
) ? void (0) : __assert_fail ("NumBits <= 32 && \"Too many bits to emit!\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 161, __extension__ __PRETTY_FUNCTION__));
  if ((uint32_t)Val == Val)
    return EmitVBR((uint32_t)Val, NumBits);

  uint32_t Threshold = 1U << (NumBits-1);

  // Emit the bits with VBR encoding, NumBits-1 bits at a time.
  while (Val >= Threshold) {
    Emit(((uint32_t)Val & ((1 << (NumBits-1))-1)) |
         (1 << (NumBits-1)), NumBits);
    Val >>= NumBits-1;
  }

  Emit((uint32_t)Val, NumBits);
}

/// EmitCode - Emit the specified code.
void EmitCode(unsigned Val) {
  Emit(Val, CurCodeSize);
}

//===--------------------------------------------------------------------===//
// Block Manipulation
//===--------------------------------------------------------------------===//

/// getBlockInfo - If there is block info for the specified ID, return it,
/// otherwise return null.
BlockInfo *getBlockInfo(unsigned BlockID) {
  // Common case, the most recent entry matches BlockID.
  if (!BlockInfoRecords.empty() && BlockInfoRecords.back().BlockID == BlockID)
    return &BlockInfoRecords.back();

  for (unsigned i = 0, e = static_cast<unsigned>(BlockInfoRecords.size());
       i != e; ++i)
    if (BlockInfoRecords[i].BlockID == BlockID)
      return &BlockInfoRecords[i];
  return nullptr;
}

void EnterSubblock(unsigned BlockID, unsigned CodeLen) {
  // Block header:
  //    [ENTER_SUBBLOCK, blockid, newcodelen, <align4bytes>, blocklen]
  EmitCode(bitc::ENTER_SUBBLOCK);
  EmitVBR(BlockID, bitc::BlockIDWidth);
  EmitVBR(CodeLen, bitc::CodeLenWidth);
  FlushToWord();

  size_t BlockSizeWordIndex = GetWordIndex();
  unsigned OldCodeSize = CurCodeSize;

  // Emit a placeholder, which will be replaced when the block is popped.
  Emit(0, bitc::BlockSizeWidth);

  CurCodeSize = CodeLen;

  // Push the outer block's abbrev set onto the stack, start out with an
  // empty abbrev set.
  BlockScope.emplace_back(OldCodeSize, BlockSizeWordIndex);
  BlockScope.back().PrevAbbrevs.swap(CurAbbrevs);

  // If there is a blockinfo for this BlockID, add all the predefined abbrevs
  // to the abbrev list.
  if (BlockInfo *Info = getBlockInfo(BlockID)) {
    CurAbbrevs.insert(CurAbbrevs.end(), Info->Abbrevs.begin(),
                      Info->Abbrevs.end());
  }
}

void ExitBlock() {
  assert(!BlockScope.empty() && "Block scope imbalance!")(static_cast <bool> (!BlockScope.empty() && "Block scope imbalance!"
) ? void (0) : __assert_fail ("!BlockScope.empty() && \"Block scope imbalance!\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 230, __extension__ __PRETTY_FUNCTION__));
  const Block &B = BlockScope.back();

  // Block tail:
  //    [END_BLOCK, <align4bytes>]
  EmitCode(bitc::END_BLOCK);
  FlushToWord();

  // Compute the size of the block, in words, not counting the size field.
  size_t SizeInWords = GetWordIndex() - B.StartSizeWord - 1;
  uint64_t BitNo = uint64_t(B.StartSizeWord) * 32;

  // Update the block size field in the header of this sub-block.
  BackpatchWord(BitNo, SizeInWords);

  // Restore the inner block's code size and abbrev table.
  CurCodeSize = B.PrevCodeSize;
  CurAbbrevs = std::move(B.PrevAbbrevs);
  BlockScope.pop_back();
}

//===--------------------------------------------------------------------===//
// Record Emission
//===--------------------------------------------------------------------===//

255private:
/// EmitAbbreviatedLiteral - Emit a literal value according to its abbrev
/// record.  This is a no-op, since the abbrev specifies the literal to use.
template<typename uintty>
void EmitAbbreviatedLiteral(const BitCodeAbbrevOp &Op, uintty V) {
  assert(Op.isLiteral() && "Not a literal")(static_cast <bool> (Op.isLiteral() && "Not a literal"
) ? void (0) : __assert_fail ("Op.isLiteral() && \"Not a literal\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 260, __extension__ __PRETTY_FUNCTION__));
  // If the abbrev specifies the literal value to use, don't emit
  // anything.
  assert(V == Op.getLiteralValue() &&(static_cast <bool> (V == Op.getLiteralValue() &&
 "Invalid abbrev for record!") ? void (0) : __assert_fail ("V == Op.getLiteralValue() && \"Invalid abbrev for record!\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 264, __extension__ __PRETTY_FUNCTION__))
         "Invalid abbrev for record!")(static_cast <bool> (V == Op.getLiteralValue() &&
 "Invalid abbrev for record!") ? void (0) : __assert_fail ("V == Op.getLiteralValue() && \"Invalid abbrev for record!\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 264, __extension__ __PRETTY_FUNCTION__));
}

/// EmitAbbreviatedField - Emit a single scalar field value with the specified
/// encoding.
template<typename uintty>
void EmitAbbreviatedField(const BitCodeAbbrevOp &Op, uintty V) {
  assert(!Op.isLiteral() && "Literals should use EmitAbbreviatedLiteral!")(static_cast <bool> (!Op.isLiteral() && "Literals should use EmitAbbreviatedLiteral!"
) ? void (0) : __assert_fail ("!Op.isLiteral() && \"Literals should use EmitAbbreviatedLiteral!\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 271, __extension__ __PRETTY_FUNCTION__));

  // Encode the value as we are commanded.
  switch (Op.getEncoding()) {
  default: llvm_unreachable("Unknown encoding!")::llvm::llvm_unreachable_internal("Unknown encoding!", "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 275);
  case BitCodeAbbrevOp::Fixed:
    if (Op.getEncodingData())
      Emit((unsigned)V, (unsigned)Op.getEncodingData());
    break;
  case BitCodeAbbrevOp::VBR:
    if (Op.getEncodingData())
      EmitVBR64(V, (unsigned)Op.getEncodingData());
    break;
  case BitCodeAbbrevOp::Char6:
    Emit(BitCodeAbbrevOp::EncodeChar6((char)V), 6);
    break;
  }
}

/// EmitRecordWithAbbrevImpl - This is the core implementation of the record
/// emission code.  If BlobData is non-null, then it specifies an array of
/// data that should be emitted as part of the Blob or Array operand that is
/// known to exist at the end of the record. If Code is specified, then
/// it is the record code to emit before the Vals, which must not contain
/// the code.
template <typename uintty>
void EmitRecordWithAbbrevImpl(unsigned Abbrev, ArrayRef<uintty> Vals,
                              StringRef Blob, Optional<unsigned> Code) {
  const char *BlobData = Blob.data();
  unsigned BlobLen = (unsigned) Blob.size();
  unsigned AbbrevNo = Abbrev-bitc::FIRST_APPLICATION_ABBREV;
  assert(AbbrevNo < CurAbbrevs.size() && "Invalid abbrev #!")(static_cast <bool> (AbbrevNo < CurAbbrevs.size() &&
 "Invalid abbrev #!") ? void (0) : __assert_fail ("AbbrevNo < CurAbbrevs.size() && \"Invalid abbrev #!\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 302, __extension__ __PRETTY_FUNCTION__));
  const BitCodeAbbrev *Abbv = CurAbbrevs[AbbrevNo].get();

  EmitCode(Abbrev);

  unsigned i = 0, e = static_cast<unsigned>(Abbv->getNumOperandInfos());
  if (Code) {
    assert(e && "Expected non-empty abbreviation")(static_cast <bool> (e && "Expected non-empty abbreviation"
) ? void (0) : __assert_fail ("e && \"Expected non-empty abbreviation\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 309, __extension__ __PRETTY_FUNCTION__));
    const BitCodeAbbrevOp &Op = Abbv->getOperandInfo(i++);

    if (Op.isLiteral())
      EmitAbbreviatedLiteral(Op, Code.getValue());
    else {
      assert(Op.getEncoding() != BitCodeAbbrevOp::Array &&(static_cast <bool> (Op.getEncoding() != BitCodeAbbrevOp
::Array && Op.getEncoding() != BitCodeAbbrevOp::Blob &&
 "Expected literal or scalar") ? void (0) : __assert_fail ("Op.getEncoding() != BitCodeAbbrevOp::Array && Op.getEncoding() != BitCodeAbbrevOp::Blob && \"Expected literal or scalar\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 317, __extension__ __PRETTY_FUNCTION__))
             Op.getEncoding() != BitCodeAbbrevOp::Blob &&(static_cast <bool> (Op.getEncoding() != BitCodeAbbrevOp
::Array && Op.getEncoding() != BitCodeAbbrevOp::Blob &&
 "Expected literal or scalar") ? void (0) : __assert_fail ("Op.getEncoding() != BitCodeAbbrevOp::Array && Op.getEncoding() != BitCodeAbbrevOp::Blob && \"Expected literal or scalar\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 317, __extension__ __PRETTY_FUNCTION__))
             "Expected literal or scalar")(static_cast <bool> (Op.getEncoding() != BitCodeAbbrevOp
::Array && Op.getEncoding() != BitCodeAbbrevOp::Blob &&
 "Expected literal or scalar") ? void (0) : __assert_fail ("Op.getEncoding() != BitCodeAbbrevOp::Array && Op.getEncoding() != BitCodeAbbrevOp::Blob && \"Expected literal or scalar\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 317, __extension__ __PRETTY_FUNCTION__));
      EmitAbbreviatedField(Op, Code.getValue());
    }
  }

  unsigned RecordIdx = 0;
  for (; i != e; ++i) {
    const BitCodeAbbrevOp &Op = Abbv->getOperandInfo(i);
    if (Op.isLiteral()) {
      assert(RecordIdx < Vals.size() && "Invalid abbrev/record")(static_cast <bool> (RecordIdx < Vals.size() &&
 "Invalid abbrev/record") ? void (0) : __assert_fail ("RecordIdx < Vals.size() && \"Invalid abbrev/record\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 326, __extension__ __PRETTY_FUNCTION__));
      EmitAbbreviatedLiteral(Op, Vals[RecordIdx]);
      ++RecordIdx;
    } else if (Op.getEncoding() == BitCodeAbbrevOp::Array) {
      // Array case.
      assert(i + 2 == e && "array op not second to last?")(static_cast <bool> (i + 2 == e && "array op not second to last?"
) ? void (0) : __assert_fail ("i + 2 == e && \"array op not second to last?\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 331, __extension__ __PRETTY_FUNCTION__));
      const BitCodeAbbrevOp &EltEnc = Abbv->getOperandInfo(++i);

      // If this record has blob data, emit it, otherwise we must have record
      // entries to encode this way.
      if (BlobData) {
        assert(RecordIdx == Vals.size() &&(static_cast <bool> (RecordIdx == Vals.size() &&
 "Blob data and record entries specified for array!") ? void (
0) : __assert_fail ("RecordIdx == Vals.size() && \"Blob data and record entries specified for array!\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 338, __extension__ __PRETTY_FUNCTION__))
               "Blob data and record entries specified for array!")(static_cast <bool> (RecordIdx == Vals.size() &&
 "Blob data and record entries specified for array!") ? void (
0) : __assert_fail ("RecordIdx == Vals.size() && \"Blob data and record entries specified for array!\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 338, __extension__ __PRETTY_FUNCTION__));
        // Emit a vbr6 to indicate the number of elements present.
        EmitVBR(static_cast<uint32_t>(BlobLen), 6);

        // Emit each field.
        for (unsigned i = 0; i != BlobLen; ++i)
          EmitAbbreviatedField(EltEnc, (unsigned char)BlobData[i]);

        // Know that blob data is consumed for assertion below.
        BlobData = nullptr;
      } else {
        // Emit a vbr6 to indicate the number of elements present.
        EmitVBR(static_cast<uint32_t>(Vals.size()-RecordIdx), 6);

        // Emit each field.
        for (unsigned e = Vals.size(); RecordIdx != e; ++RecordIdx)
          EmitAbbreviatedField(EltEnc, Vals[RecordIdx]);
      }
    } else if (Op.getEncoding() == BitCodeAbbrevOp::Blob) {
      // If this record has blob data, emit it, otherwise we must have record
      // entries to encode this way.

      if (BlobData) {
        assert(RecordIdx == Vals.size() &&(static_cast <bool> (RecordIdx == Vals.size() &&
 "Blob data and record entries specified for blob operand!") ?
 void (0) : __assert_fail ("RecordIdx == Vals.size() && \"Blob data and record entries specified for blob operand!\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 362, __extension__ __PRETTY_FUNCTION__))
               "Blob data and record entries specified for blob operand!")(static_cast <bool> (RecordIdx == Vals.size() &&
 "Blob data and record entries specified for blob operand!") ?
 void (0) : __assert_fail ("RecordIdx == Vals.size() && \"Blob data and record entries specified for blob operand!\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 362, __extension__ __PRETTY_FUNCTION__));

        assert(Blob.data() == BlobData && "BlobData got moved")(static_cast <bool> (Blob.data() == BlobData &&
 "BlobData got moved") ? void (0) : __assert_fail ("Blob.data() == BlobData && \"BlobData got moved\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 364, __extension__ __PRETTY_FUNCTION__));
        assert(Blob.size() == BlobLen && "BlobLen got changed")(static_cast <bool> (Blob.size() == BlobLen && "BlobLen got changed"
) ? void (0) : __assert_fail ("Blob.size() == BlobLen && \"BlobLen got changed\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 365, __extension__ __PRETTY_FUNCTION__));
        emitBlob(Blob);
        BlobData = nullptr;
      } else {
        emitBlob(Vals.slice(RecordIdx));
      }
    } else {  // Single scalar field.
      assert(RecordIdx < Vals.size() && "Invalid abbrev/record")(static_cast <bool> (RecordIdx < Vals.size() &&
 "Invalid abbrev/record") ? void (0) : __assert_fail ("RecordIdx < Vals.size() && \"Invalid abbrev/record\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 372, __extension__ __PRETTY_FUNCTION__));
      EmitAbbreviatedField(Op, Vals[RecordIdx]);
      ++RecordIdx;
    }
  }
  assert(RecordIdx == Vals.size() && "Not all record operands emitted!")(static_cast <bool> (RecordIdx == Vals.size() &&
 "Not all record operands emitted!") ? void (0) : __assert_fail
 ("RecordIdx == Vals.size() && \"Not all record operands emitted!\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 377, __extension__ __PRETTY_FUNCTION__));
  assert(BlobData == nullptr &&(static_cast <bool> (BlobData == nullptr && "Blob data specified for record that doesn't use it!"
) ? void (0) : __assert_fail ("BlobData == nullptr && \"Blob data specified for record that doesn't use it!\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 379, __extension__ __PRETTY_FUNCTION__))
         "Blob data specified for record that doesn't use it!")(static_cast <bool> (BlobData == nullptr && "Blob data specified for record that doesn't use it!"
) ? void (0) : __assert_fail ("BlobData == nullptr && \"Blob data specified for record that doesn't use it!\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 379, __extension__ __PRETTY_FUNCTION__));
}

382public:
/// Emit a blob, including flushing before and tail-padding.
template <class UIntTy>
void emitBlob(ArrayRef<UIntTy> Bytes, bool ShouldEmitSize = true) {
  // Emit a vbr6 to indicate the number of elements present.
  if (ShouldEmitSize)
    EmitVBR(static_cast<uint32_t>(Bytes.size()), 6);

  // Flush to a 32-bit alignment boundary.
  FlushToWord();

  // Emit literal bytes.
  for (const auto &B : Bytes) {
    assert(isUInt<8>(B) && "Value too large to emit as byte")(static_cast <bool> (isUInt<8>(B) && "Value too large to emit as byte"
) ? void (0) : __assert_fail ("isUInt<8>(B) && \"Value too large to emit as byte\""
, "/build/llvm-toolchain-snapshot-7~svn326425/include/llvm/Bitcode/BitstreamWriter.h"
, 395, __extension__ __PRETTY_FUNCTION__));
    WriteByte((unsigned char)B);
  }

  // Align end to 32-bits.
  while (GetBufferOffset() & 3)
    WriteByte(0);
}
void emitBlob(StringRef Bytes, bool ShouldEmitSize = true) {
  emitBlob(makeArrayRef((const uint8_t *)Bytes.data(), Bytes.size()),
           ShouldEmitSize);
}

/// EmitRecord - Emit the specified record to the stream, using an abbrev if
/// we have one to compress the output.
template <typename Container>
void EmitRecord(unsigned Code, const Container &Vals, unsigned Abbrev = 0) {
  if (!Abbrev) {
13
←
Assuming 'Abbrev' is 0→
14
←
Taking true branch→
    // If we don't have an abbrev to use, emit this in its fully unabbreviated
    // form.
    auto Count = static_cast<uint32_t>(makeArrayRef(Vals).size());
    EmitCode(bitc::UNABBREV_RECORD);
    EmitVBR(Code, 6);
    EmitVBR(Count, 6);
    for (unsigned i = 0, e = Count; i != e; ++i)
15
←
Assuming 'i' is not equal to 'e'→
16
←
Loop condition is true.  Entering loop body→
17
←
Assuming 'i' is not equal to 'e'→
18
←
Loop condition is true.  Entering loop body→
19
←
Assuming 'i' is not equal to 'e'→
20
←
Loop condition is true.  Entering loop body→
      EmitVBR64(Vals[i], 6);
21
←
1st function call argument is an uninitialized value
    return;
  }

  EmitRecordWithAbbrevImpl(Abbrev, makeArrayRef(Vals), StringRef(), Code);
}

/// EmitRecordWithAbbrev - Emit a record with the specified abbreviation.
/// Unlike EmitRecord, the code for the record should be included in Vals as
/// the first entry.
template <typename Container>
void EmitRecordWithAbbrev(unsigned Abbrev, const Container &Vals) {
  EmitRecordWithAbbrevImpl(Abbrev, makeArrayRef(Vals), StringRef(), None);
}

/// EmitRecordWithBlob - Emit the specified record to the stream, using an
/// abbrev that includes a blob at the end.  The blob data to emit is
/// specified by the pointer and length specified at the end.  In contrast to
/// EmitRecord, this routine expects that the first entry in Vals is the code
/// of the record.
template <typename Container>
void EmitRecordWithBlob(unsigned Abbrev, const Container &Vals,
                        StringRef Blob) {
  EmitRecordWithAbbrevImpl(Abbrev, makeArrayRef(Vals), Blob, None);
}
template <typename Container>
void EmitRecordWithBlob(unsigned Abbrev, const Container &Vals,
                        const char *BlobData, unsigned BlobLen) {
  return EmitRecordWithAbbrevImpl(Abbrev, makeArrayRef(Vals),
                                  StringRef(BlobData, BlobLen), None);
}

/// EmitRecordWithArray - Just like EmitRecordWithBlob, works with records
/// that end with an array.
template <typename Container>
void EmitRecordWithArray(unsigned Abbrev, const Container &Vals,
                         StringRef Array) {
  EmitRecordWithAbbrevImpl(Abbrev, makeArrayRef(Vals), Array, None);
}
template <typename Container>
void EmitRecordWithArray(unsigned Abbrev, const Container &Vals,
                         const char *ArrayData, unsigned ArrayLen) {
  return EmitRecordWithAbbrevImpl(Abbrev, makeArrayRef(Vals),
                                  StringRef(ArrayData, ArrayLen), None);
}

//===--------------------------------------------------------------------===//
// Abbrev Emission
//===--------------------------------------------------------------------===//

470private:
// Emit the abbreviation as a DEFINE_ABBREV record.
void EncodeAbbrev(const BitCodeAbbrev &Abbv) {
  EmitCode(bitc::DEFINE_ABBREV);
  EmitVBR(Abbv.getNumOperandInfos(), 5);
  for (unsigned i = 0, e = static_cast<unsigned>(Abbv.getNumOperandInfos());
       i != e; ++i) {
    const BitCodeAbbrevOp &Op = Abbv.getOperandInfo(i);
    Emit(Op.isLiteral(), 1);
    if (Op.isLiteral()) {
      EmitVBR64(Op.getLiteralValue(), 8);
    } else {
      Emit(Op.getEncoding(), 3);
      if (Op.hasEncodingData())
        EmitVBR64(Op.getEncodingData(), 5);
    }
  }
}
488public:

/// EmitAbbrev - This emits an abbreviation to the stream.  Note that this
/// method takes ownership of the specified abbrev.
unsigned EmitAbbrev(std::shared_ptr<BitCodeAbbrev> Abbv) {
  // Emit the abbreviation as a record.
  EncodeAbbrev(*Abbv);
  CurAbbrevs.push_back(std::move(Abbv));
  return static_cast<unsigned>(CurAbbrevs.size())-1 +
    bitc::FIRST_APPLICATION_ABBREV;
}

//===--------------------------------------------------------------------===//
// BlockInfo Block Emission
//===--------------------------------------------------------------------===//

/// EnterBlockInfoBlock - Start emitting the BLOCKINFO_BLOCK.
void EnterBlockInfoBlock() {
  EnterSubblock(bitc::BLOCKINFO_BLOCK_ID, 2);
  BlockInfoCurBID = ~0U;
  BlockInfoRecords.clear();
}
510private:
/// SwitchToBlockID - If we aren't already talking about the specified block
/// ID, emit a BLOCKINFO_CODE_SETBID record.
void SwitchToBlockID(unsigned BlockID) {
  if (BlockInfoCurBID == BlockID) return;
  SmallVector<unsigned, 2> V;
  V.push_back(BlockID);
  EmitRecord(bitc::BLOCKINFO_CODE_SETBID, V);
  BlockInfoCurBID = BlockID;
}

BlockInfo &getOrCreateBlockInfo(unsigned BlockID) {
  if (BlockInfo *BI = getBlockInfo(BlockID))
    return *BI;

  // Otherwise, add a new record.
  BlockInfoRecords.emplace_back();
  BlockInfoRecords.back().BlockID = BlockID;
  return BlockInfoRecords.back();
}

531public:

/// EmitBlockInfoAbbrev - Emit a DEFINE_ABBREV record for the specified
/// BlockID.
unsigned EmitBlockInfoAbbrev(unsigned BlockID, std::shared_ptr<BitCodeAbbrev> Abbv) {
  SwitchToBlockID(BlockID);
  EncodeAbbrev(*Abbv);

  // Add the abbrev to the specified block record.
  BlockInfo &Info = getOrCreateBlockInfo(BlockID);
  Info.Abbrevs.push_back(std::move(Abbv));

  return Info.Abbrevs.size()-1+bitc::FIRST_APPLICATION_ABBREV;
}
545};


548} // End llvm namespace

550#endif