/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp

Bug Summary

File:	tools/clang/lib/Serialization/ASTReader.cpp
Warning:	line 12406, column 3 1st function call argument is an uninitialized value
Annotated Source Code

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clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name ASTReader.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -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 -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mthread-model posix -mframe-pointer=none -relaxed-aliasing -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-10/lib/clang/10.0.0 -D CLANG_VENDOR="Debian " -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-10~svn371925/build-llvm/tools/clang/lib/Serialization -I /build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization -I /build/llvm-toolchain-snapshot-10~svn371925/tools/clang/include -I /build/llvm-toolchain-snapshot-10~svn371925/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-10~svn371925/build-llvm/include -I /build/llvm-toolchain-snapshot-10~svn371925/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-10/lib/clang/10.0.0/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++14 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-10~svn371925/build-llvm/tools/clang/lib/Serialization -fdebug-prefix-map=/build/llvm-toolchain-snapshot-10~svn371925=. -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -stack-protector 2 -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -o /tmp/scan-build-2019-09-16-004128-2169-1 -x c++ /build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp
1//===- ASTReader.cpp - AST File Reader ------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9//  This file defines the ASTReader class, which reads AST files.
10//
11//===----------------------------------------------------------------------===//

13#include "clang/Serialization/ASTReader.h"
14#include "ASTCommon.h"
15#include "ASTReaderInternals.h"
16#include "clang/AST/ASTConsumer.h"
17#include "clang/AST/ASTContext.h"
18#include "clang/AST/ASTMutationListener.h"
19#include "clang/AST/ASTUnresolvedSet.h"
20#include "clang/AST/Decl.h"
21#include "clang/AST/DeclBase.h"
22#include "clang/AST/DeclCXX.h"
23#include "clang/AST/DeclFriend.h"
24#include "clang/AST/DeclGroup.h"
25#include "clang/AST/DeclObjC.h"
26#include "clang/AST/DeclTemplate.h"
27#include "clang/AST/DeclarationName.h"
28#include "clang/AST/Expr.h"
29#include "clang/AST/ExprCXX.h"
30#include "clang/AST/ExternalASTSource.h"
31#include "clang/AST/NestedNameSpecifier.h"
32#include "clang/AST/ODRHash.h"
33#include "clang/AST/RawCommentList.h"
34#include "clang/AST/TemplateBase.h"
35#include "clang/AST/TemplateName.h"
36#include "clang/AST/Type.h"
37#include "clang/AST/TypeLoc.h"
38#include "clang/AST/TypeLocVisitor.h"
39#include "clang/AST/UnresolvedSet.h"
40#include "clang/Basic/CommentOptions.h"
41#include "clang/Basic/Diagnostic.h"
42#include "clang/Basic/DiagnosticOptions.h"
43#include "clang/Basic/ExceptionSpecificationType.h"
44#include "clang/Basic/FileManager.h"
45#include "clang/Basic/FileSystemOptions.h"
46#include "clang/Basic/IdentifierTable.h"
47#include "clang/Basic/LLVM.h"
48#include "clang/Basic/LangOptions.h"
49#include "clang/Basic/Module.h"
50#include "clang/Basic/ObjCRuntime.h"
51#include "clang/Basic/OperatorKinds.h"
52#include "clang/Basic/PragmaKinds.h"
53#include "clang/Basic/Sanitizers.h"
54#include "clang/Basic/SourceLocation.h"
55#include "clang/Basic/SourceManager.h"
56#include "clang/Basic/SourceManagerInternals.h"
57#include "clang/Basic/Specifiers.h"
58#include "clang/Basic/TargetInfo.h"
59#include "clang/Basic/TargetOptions.h"
60#include "clang/Basic/TokenKinds.h"
61#include "clang/Basic/Version.h"
62#include "clang/Lex/HeaderSearch.h"
63#include "clang/Lex/HeaderSearchOptions.h"
64#include "clang/Lex/MacroInfo.h"
65#include "clang/Lex/ModuleMap.h"
66#include "clang/Lex/PreprocessingRecord.h"
67#include "clang/Lex/Preprocessor.h"
68#include "clang/Lex/PreprocessorOptions.h"
69#include "clang/Lex/Token.h"
70#include "clang/Sema/ObjCMethodList.h"
71#include "clang/Sema/Scope.h"
72#include "clang/Sema/Sema.h"
73#include "clang/Sema/Weak.h"
74#include "clang/Serialization/ASTBitCodes.h"
75#include "clang/Serialization/ASTDeserializationListener.h"
76#include "clang/Serialization/ContinuousRangeMap.h"
77#include "clang/Serialization/GlobalModuleIndex.h"
78#include "clang/Serialization/InMemoryModuleCache.h"
79#include "clang/Serialization/Module.h"
80#include "clang/Serialization/ModuleFileExtension.h"
81#include "clang/Serialization/ModuleManager.h"
82#include "clang/Serialization/PCHContainerOperations.h"
83#include "clang/Serialization/SerializationDiagnostic.h"
84#include "llvm/ADT/APFloat.h"
85#include "llvm/ADT/APInt.h"
86#include "llvm/ADT/APSInt.h"
87#include "llvm/ADT/ArrayRef.h"
88#include "llvm/ADT/DenseMap.h"
89#include "llvm/ADT/FoldingSet.h"
90#include "llvm/ADT/Hashing.h"
91#include "llvm/ADT/IntrusiveRefCntPtr.h"
92#include "llvm/ADT/None.h"
93#include "llvm/ADT/Optional.h"
94#include "llvm/ADT/STLExtras.h"
95#include "llvm/ADT/ScopeExit.h"
96#include "llvm/ADT/SmallPtrSet.h"
97#include "llvm/ADT/SmallString.h"
98#include "llvm/ADT/SmallVector.h"
99#include "llvm/ADT/StringExtras.h"
100#include "llvm/ADT/StringMap.h"
101#include "llvm/ADT/StringRef.h"
102#include "llvm/ADT/Triple.h"
103#include "llvm/ADT/iterator_range.h"
104#include "llvm/Bitstream/BitstreamReader.h"
105#include "llvm/Support/Casting.h"
106#include "llvm/Support/Compiler.h"
107#include "llvm/Support/Compression.h"
108#include "llvm/Support/DJB.h"
109#include "llvm/Support/Endian.h"
110#include "llvm/Support/Error.h"
111#include "llvm/Support/ErrorHandling.h"
112#include "llvm/Support/FileSystem.h"
113#include "llvm/Support/MemoryBuffer.h"
114#include "llvm/Support/Path.h"
115#include "llvm/Support/SaveAndRestore.h"
116#include "llvm/Support/Timer.h"
117#include "llvm/Support/VersionTuple.h"
118#include "llvm/Support/raw_ostream.h"
119#include <algorithm>
120#include <cassert>
121#include <cstddef>
122#include <cstdint>
123#include <cstdio>
124#include <ctime>
125#include <iterator>
126#include <limits>
127#include <map>
128#include <memory>
129#include <string>
130#include <system_error>
131#include <tuple>
132#include <utility>
133#include <vector>

135using namespace clang;
136using namespace clang::serialization;
137using namespace clang::serialization::reader;
138using llvm::BitstreamCursor;

140//===----------------------------------------------------------------------===//
141// ChainedASTReaderListener implementation
142//===----------------------------------------------------------------------===//

144bool
145ChainedASTReaderListener::ReadFullVersionInformation(StringRef FullVersion) {
return First->ReadFullVersionInformation(FullVersion) ||
       Second->ReadFullVersionInformation(FullVersion);
148}

150void ChainedASTReaderListener::ReadModuleName(StringRef ModuleName) {
First->ReadModuleName(ModuleName);
Second->ReadModuleName(ModuleName);
153}

155void ChainedASTReaderListener::ReadModuleMapFile(StringRef ModuleMapPath) {
First->ReadModuleMapFile(ModuleMapPath);
Second->ReadModuleMapFile(ModuleMapPath);
158}

160bool
161ChainedASTReaderListener::ReadLanguageOptions(const LangOptions &LangOpts,
                                            bool Complain,
                                            bool AllowCompatibleDifferences) {
return First->ReadLanguageOptions(LangOpts, Complain,
                                  AllowCompatibleDifferences) ||
       Second->ReadLanguageOptions(LangOpts, Complain,
                                   AllowCompatibleDifferences);
168}

170bool ChainedASTReaderListener::ReadTargetOptions(
  const TargetOptions &TargetOpts, bool Complain,
  bool AllowCompatibleDifferences) {
return First->ReadTargetOptions(TargetOpts, Complain,
                                AllowCompatibleDifferences) ||
       Second->ReadTargetOptions(TargetOpts, Complain,
                                 AllowCompatibleDifferences);
177}

179bool ChainedASTReaderListener::ReadDiagnosticOptions(
  IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts, bool Complain) {
return First->ReadDiagnosticOptions(DiagOpts, Complain) ||
       Second->ReadDiagnosticOptions(DiagOpts, Complain);
183}

185bool
186ChainedASTReaderListener::ReadFileSystemOptions(const FileSystemOptions &FSOpts,
                                              bool Complain) {
return First->ReadFileSystemOptions(FSOpts, Complain) ||
       Second->ReadFileSystemOptions(FSOpts, Complain);
190}

192bool ChainedASTReaderListener::ReadHeaderSearchOptions(
  const HeaderSearchOptions &HSOpts, StringRef SpecificModuleCachePath,
  bool Complain) {
return First->ReadHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
                                      Complain) ||
       Second->ReadHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
                                       Complain);
199}

201bool ChainedASTReaderListener::ReadPreprocessorOptions(
  const PreprocessorOptions &PPOpts, bool Complain,
  std::string &SuggestedPredefines) {
return First->ReadPreprocessorOptions(PPOpts, Complain,
                                      SuggestedPredefines) ||
       Second->ReadPreprocessorOptions(PPOpts, Complain, SuggestedPredefines);
207}

209void ChainedASTReaderListener::ReadCounter(const serialization::ModuleFile &M,
                                         unsigned Value) {
First->ReadCounter(M, Value);
Second->ReadCounter(M, Value);
213}

215bool ChainedASTReaderListener::needsInputFileVisitation() {
return First->needsInputFileVisitation() ||
       Second->needsInputFileVisitation();
218}

220bool ChainedASTReaderListener::needsSystemInputFileVisitation() {
return First->needsSystemInputFileVisitation() ||
Second->needsSystemInputFileVisitation();
223}

225void ChainedASTReaderListener::visitModuleFile(StringRef Filename,
                                             ModuleKind Kind) {
First->visitModuleFile(Filename, Kind);
Second->visitModuleFile(Filename, Kind);
229}

231bool ChainedASTReaderListener::visitInputFile(StringRef Filename,
                                            bool isSystem,
                                            bool isOverridden,
                                            bool isExplicitModule) {
bool Continue = false;
if (First->needsInputFileVisitation() &&
    (!isSystem || First->needsSystemInputFileVisitation()))
  Continue |= First->visitInputFile(Filename, isSystem, isOverridden,
                                    isExplicitModule);
if (Second->needsInputFileVisitation() &&
    (!isSystem || Second->needsSystemInputFileVisitation()))
  Continue |= Second->visitInputFile(Filename, isSystem, isOverridden,
                                     isExplicitModule);
return Continue;
245}

247void ChainedASTReaderListener::readModuleFileExtension(
     const ModuleFileExtensionMetadata &Metadata) {
First->readModuleFileExtension(Metadata);
Second->readModuleFileExtension(Metadata);
251}

253//===----------------------------------------------------------------------===//
254// PCH validator implementation
255//===----------------------------------------------------------------------===//

257ASTReaderListener::~ASTReaderListener() = default;

259/// Compare the given set of language options against an existing set of
260/// language options.
261///
262/// \param Diags If non-NULL, diagnostics will be emitted via this engine.
263/// \param AllowCompatibleDifferences If true, differences between compatible
264///        language options will be permitted.
265///
266/// \returns true if the languagae options mis-match, false otherwise.
267static bool checkLanguageOptions(const LangOptions &LangOpts,
                               const LangOptions &ExistingLangOpts,
                               DiagnosticsEngine *Diags,
                               bool AllowCompatibleDifferences = true) {
271#define LANGOPT(Name, Bits, Default, Description)                 \
if (ExistingLangOpts.Name != LangOpts.Name) {                   \
  if (Diags)                                                    \
    Diags->Report(diag::err_pch_langopt_mismatch)               \
      << Description << LangOpts.Name << ExistingLangOpts.Name; \
  return true;                                                  \
}

279#define VALUE_LANGOPT(Name, Bits, Default, Description)   \
if (ExistingLangOpts.Name != LangOpts.Name) {           \
  if (Diags)                                            \
    Diags->Report(diag::err_pch_langopt_value_mismatch) \
      << Description;                                   \
  return true;                                          \
}

287#define ENUM_LANGOPT(Name, Type, Bits, Default, Description)   \
if (ExistingLangOpts.get##Name() != LangOpts.get##Name()) {  \
  if (Diags)                                                 \
    Diags->Report(diag::err_pch_langopt_value_mismatch)      \
      << Description;                                        \
  return true;                                               \
}

295#define COMPATIBLE_LANGOPT(Name, Bits, Default, Description)  \
if (!AllowCompatibleDifferences)                            \
  LANGOPT(Name, Bits, Default, Description)

299#define COMPATIBLE_ENUM_LANGOPT(Name, Bits, Default, Description)  \
if (!AllowCompatibleDifferences)                                 \
  ENUM_LANGOPT(Name, Bits, Default, Description)

303#define COMPATIBLE_VALUE_LANGOPT(Name, Bits, Default, Description) \
if (!AllowCompatibleDifferences)                                 \
  VALUE_LANGOPT(Name, Bits, Default, Description)

307#define BENIGN_LANGOPT(Name, Bits, Default, Description)
308#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
309#define BENIGN_VALUE_LANGOPT(Name, Type, Bits, Default, Description)
310#include "clang/Basic/LangOptions.def"

if (ExistingLangOpts.ModuleFeatures != LangOpts.ModuleFeatures) {
  if (Diags)
    Diags->Report(diag::err_pch_langopt_value_mismatch) << "module features";
  return true;
}

if (ExistingLangOpts.ObjCRuntime != LangOpts.ObjCRuntime) {
  if (Diags)
    Diags->Report(diag::err_pch_langopt_value_mismatch)
    << "target Objective-C runtime";
  return true;
}

if (ExistingLangOpts.CommentOpts.BlockCommandNames !=
    LangOpts.CommentOpts.BlockCommandNames) {
  if (Diags)
    Diags->Report(diag::err_pch_langopt_value_mismatch)
      << "block command names";
  return true;
}

// Sanitizer feature mismatches are treated as compatible differences. If
// compatible differences aren't allowed, we still only want to check for
// mismatches of non-modular sanitizers (the only ones which can affect AST
// generation).
if (!AllowCompatibleDifferences) {
  SanitizerMask ModularSanitizers = getPPTransparentSanitizers();
  SanitizerSet ExistingSanitizers = ExistingLangOpts.Sanitize;
  SanitizerSet ImportedSanitizers = LangOpts.Sanitize;
  ExistingSanitizers.clear(ModularSanitizers);
  ImportedSanitizers.clear(ModularSanitizers);
  if (ExistingSanitizers.Mask != ImportedSanitizers.Mask) {
    const std::string Flag = "-fsanitize=";
    if (Diags) {
346#define SANITIZER(NAME, ID)                                                    \
{                                                                            \
  bool InExistingModule = ExistingSanitizers.has(SanitizerKind::ID);         \
  bool InImportedModule = ImportedSanitizers.has(SanitizerKind::ID);         \
  if (InExistingModule != InImportedModule)                                  \
    Diags->Report(diag::err_pch_targetopt_feature_mismatch)                  \
        << InExistingModule << (Flag + NAME);                                \
}
354#include "clang/Basic/Sanitizers.def"
    }
    return true;
  }
}

return false;
361}

363/// Compare the given set of target options against an existing set of
364/// target options.
365///
366/// \param Diags If non-NULL, diagnostics will be emitted via this engine.
367///
368/// \returns true if the target options mis-match, false otherwise.
369static bool checkTargetOptions(const TargetOptions &TargetOpts,
                             const TargetOptions &ExistingTargetOpts,
                             DiagnosticsEngine *Diags,
                             bool AllowCompatibleDifferences = true) {
373#define CHECK_TARGET_OPT(Field, Name)                             \
if (TargetOpts.Field != ExistingTargetOpts.Field) {             \
  if (Diags)                                                    \
    Diags->Report(diag::err_pch_targetopt_mismatch)             \
      << Name << TargetOpts.Field << ExistingTargetOpts.Field;  \
  return true;                                                  \
}

// The triple and ABI must match exactly.
CHECK_TARGET_OPT(Triple, "target");
CHECK_TARGET_OPT(ABI, "target ABI");

// We can tolerate different CPUs in many cases, notably when one CPU
// supports a strict superset of another. When allowing compatible
// differences skip this check.
if (!AllowCompatibleDifferences)
  CHECK_TARGET_OPT(CPU, "target CPU");

391#undef CHECK_TARGET_OPT

// Compare feature sets.
SmallVector<StringRef, 4> ExistingFeatures(
                                           ExistingTargetOpts.FeaturesAsWritten.begin(),
                                           ExistingTargetOpts.FeaturesAsWritten.end());
SmallVector<StringRef, 4> ReadFeatures(TargetOpts.FeaturesAsWritten.begin(),
                                       TargetOpts.FeaturesAsWritten.end());
llvm::sort(ExistingFeatures);
llvm::sort(ReadFeatures);

// We compute the set difference in both directions explicitly so that we can
// diagnose the differences differently.
SmallVector<StringRef, 4> UnmatchedExistingFeatures, UnmatchedReadFeatures;
std::set_difference(
    ExistingFeatures.begin(), ExistingFeatures.end(), ReadFeatures.begin(),
    ReadFeatures.end(), std::back_inserter(UnmatchedExistingFeatures));
std::set_difference(ReadFeatures.begin(), ReadFeatures.end(),
                    ExistingFeatures.begin(), ExistingFeatures.end(),
                    std::back_inserter(UnmatchedReadFeatures));

// If we are allowing compatible differences and the read feature set is
// a strict subset of the existing feature set, there is nothing to diagnose.
if (AllowCompatibleDifferences && UnmatchedReadFeatures.empty())
  return false;

if (Diags) {
  for (StringRef Feature : UnmatchedReadFeatures)
    Diags->Report(diag::err_pch_targetopt_feature_mismatch)
        << /* is-existing-feature */ false << Feature;
  for (StringRef Feature : UnmatchedExistingFeatures)
    Diags->Report(diag::err_pch_targetopt_feature_mismatch)
        << /* is-existing-feature */ true << Feature;
}

return !UnmatchedReadFeatures.empty() || !UnmatchedExistingFeatures.empty();
427}

429bool
430PCHValidator::ReadLanguageOptions(const LangOptions &LangOpts,
                                bool Complain,
                                bool AllowCompatibleDifferences) {
const LangOptions &ExistingLangOpts = PP.getLangOpts();
return checkLanguageOptions(LangOpts, ExistingLangOpts,
                            Complain ? &Reader.Diags : nullptr,
                            AllowCompatibleDifferences);
437}

439bool PCHValidator::ReadTargetOptions(const TargetOptions &TargetOpts,
                                   bool Complain,
                                   bool AllowCompatibleDifferences) {
const TargetOptions &ExistingTargetOpts = PP.getTargetInfo().getTargetOpts();
return checkTargetOptions(TargetOpts, ExistingTargetOpts,
                          Complain ? &Reader.Diags : nullptr,
                          AllowCompatibleDifferences);
446}

448namespace {

450using MacroDefinitionsMap =
  llvm::StringMap<std::pair<StringRef, bool /*IsUndef*/>>;
452using DeclsMap = llvm::DenseMap<DeclarationName, SmallVector<NamedDecl *, 8>>;

454} // namespace

456static bool checkDiagnosticGroupMappings(DiagnosticsEngine &StoredDiags,
                                       DiagnosticsEngine &Diags,
                                       bool Complain) {
using Level = DiagnosticsEngine::Level;

// Check current mappings for new -Werror mappings, and the stored mappings
// for cases that were explicitly mapped to *not* be errors that are now
// errors because of options like -Werror.
DiagnosticsEngine *MappingSources[] = { &Diags, &StoredDiags };

for (DiagnosticsEngine *MappingSource : MappingSources) {
  for (auto DiagIDMappingPair : MappingSource->getDiagnosticMappings()) {
    diag::kind DiagID = DiagIDMappingPair.first;
    Level CurLevel = Diags.getDiagnosticLevel(DiagID, SourceLocation());
    if (CurLevel < DiagnosticsEngine::Error)
      continue; // not significant
    Level StoredLevel =
        StoredDiags.getDiagnosticLevel(DiagID, SourceLocation());
    if (StoredLevel < DiagnosticsEngine::Error) {
      if (Complain)
        Diags.Report(diag::err_pch_diagopt_mismatch) << "-Werror=" +
            Diags.getDiagnosticIDs()->getWarningOptionForDiag(DiagID).str();
      return true;
    }
  }
}

return false;
484}

486static bool isExtHandlingFromDiagsError(DiagnosticsEngine &Diags) {
diag::Severity Ext = Diags.getExtensionHandlingBehavior();
if (Ext == diag::Severity::Warning && Diags.getWarningsAsErrors())
  return true;
return Ext >= diag::Severity::Error;
491}

493static bool checkDiagnosticMappings(DiagnosticsEngine &StoredDiags,
                                  DiagnosticsEngine &Diags,
                                  bool IsSystem, bool Complain) {
// Top-level options
if (IsSystem) {
  if (Diags.getSuppressSystemWarnings())
    return false;
  // If -Wsystem-headers was not enabled before, be conservative
  if (StoredDiags.getSuppressSystemWarnings()) {
    if (Complain)
      Diags.Report(diag::err_pch_diagopt_mismatch) << "-Wsystem-headers";
    return true;
  }
}

if (Diags.getWarningsAsErrors() && !StoredDiags.getWarningsAsErrors()) {
  if (Complain)
    Diags.Report(diag::err_pch_diagopt_mismatch) << "-Werror";
  return true;
}

if (Diags.getWarningsAsErrors() && Diags.getEnableAllWarnings() &&
    !StoredDiags.getEnableAllWarnings()) {
  if (Complain)
    Diags.Report(diag::err_pch_diagopt_mismatch) << "-Weverything -Werror";
  return true;
}

if (isExtHandlingFromDiagsError(Diags) &&
    !isExtHandlingFromDiagsError(StoredDiags)) {
  if (Complain)
    Diags.Report(diag::err_pch_diagopt_mismatch) << "-pedantic-errors";
  return true;
}

return checkDiagnosticGroupMappings(StoredDiags, Diags, Complain);
529}

531/// Return the top import module if it is implicit, nullptr otherwise.
532static Module *getTopImportImplicitModule(ModuleManager &ModuleMgr,
                                        Preprocessor &PP) {
// If the original import came from a file explicitly generated by the user,
// don't check the diagnostic mappings.
// FIXME: currently this is approximated by checking whether this is not a
// module import of an implicitly-loaded module file.
// Note: ModuleMgr.rbegin() may not be the current module, but it must be in
// the transitive closure of its imports, since unrelated modules cannot be
// imported until after this module finishes validation.
ModuleFile *TopImport = &*ModuleMgr.rbegin();
while (!TopImport->ImportedBy.empty())
  TopImport = TopImport->ImportedBy[0];
if (TopImport->Kind != MK_ImplicitModule)
  return nullptr;

StringRef ModuleName = TopImport->ModuleName;
assert(!ModuleName.empty() && "diagnostic options read before module name")((!ModuleName.empty() && "diagnostic options read before module name"
) ? static_cast<void> (0) : __assert_fail ("!ModuleName.empty() && \"diagnostic options read before module name\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 548, __PRETTY_FUNCTION__));

Module *M = PP.getHeaderSearchInfo().lookupModule(ModuleName);
assert(M && "missing module")((M && "missing module") ? static_cast<void> (0
) : __assert_fail ("M && \"missing module\"", "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 551, __PRETTY_FUNCTION__));
return M;
553}

555bool PCHValidator::ReadDiagnosticOptions(
  IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts, bool Complain) {
DiagnosticsEngine &ExistingDiags = PP.getDiagnostics();
IntrusiveRefCntPtr<DiagnosticIDs> DiagIDs(ExistingDiags.getDiagnosticIDs());
IntrusiveRefCntPtr<DiagnosticsEngine> Diags(
    new DiagnosticsEngine(DiagIDs, DiagOpts.get()));
// This should never fail, because we would have processed these options
// before writing them to an ASTFile.
ProcessWarningOptions(*Diags, *DiagOpts, /*Report*/false);

ModuleManager &ModuleMgr = Reader.getModuleManager();
assert(ModuleMgr.size() >= 1 && "what ASTFile is this then")((ModuleMgr.size() >= 1 && "what ASTFile is this then"
) ? static_cast<void> (0) : __assert_fail ("ModuleMgr.size() >= 1 && \"what ASTFile is this then\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 566, __PRETTY_FUNCTION__));

Module *TopM = getTopImportImplicitModule(ModuleMgr, PP);
if (!TopM)
  return false;

// FIXME: if the diagnostics are incompatible, save a DiagnosticOptions that
// contains the union of their flags.
return checkDiagnosticMappings(*Diags, ExistingDiags, TopM->IsSystem,
                               Complain);
576}

578/// Collect the macro definitions provided by the given preprocessor
579/// options.
580static void
581collectMacroDefinitions(const PreprocessorOptions &PPOpts,
                      MacroDefinitionsMap &Macros,
                      SmallVectorImpl<StringRef> *MacroNames = nullptr) {
for (unsigned I = 0, N = PPOpts.Macros.size(); I != N; ++I) {
  StringRef Macro = PPOpts.Macros[I].first;
  bool IsUndef = PPOpts.Macros[I].second;

  std::pair<StringRef, StringRef> MacroPair = Macro.split('=');
  StringRef MacroName = MacroPair.first;
  StringRef MacroBody = MacroPair.second;

  // For an #undef'd macro, we only care about the name.
  if (IsUndef) {
    if (MacroNames && !Macros.count(MacroName))
      MacroNames->push_back(MacroName);

    Macros[MacroName] = std::make_pair("", true);
    continue;
  }

  // For a #define'd macro, figure out the actual definition.
  if (MacroName.size() == Macro.size())
    MacroBody = "1";
  else {
    // Note: GCC drops anything following an end-of-line character.
    StringRef::size_type End = MacroBody.find_first_of("\n\r");
    MacroBody = MacroBody.substr(0, End);
  }

  if (MacroNames && !Macros.count(MacroName))
    MacroNames->push_back(MacroName);
  Macros[MacroName] = std::make_pair(MacroBody, false);
}
614}

616/// Check the preprocessor options deserialized from the control block
617/// against the preprocessor options in an existing preprocessor.
618///
619/// \param Diags If non-null, produce diagnostics for any mismatches incurred.
620/// \param Validate If true, validate preprocessor options. If false, allow
621///        macros defined by \p ExistingPPOpts to override those defined by
622///        \p PPOpts in SuggestedPredefines.
623static bool checkPreprocessorOptions(const PreprocessorOptions &PPOpts,
                                   const PreprocessorOptions &ExistingPPOpts,
                                   DiagnosticsEngine *Diags,
                                   FileManager &FileMgr,
                                   std::string &SuggestedPredefines,
                                   const LangOptions &LangOpts,
                                   bool Validate = true) {
// Check macro definitions.
MacroDefinitionsMap ASTFileMacros;
collectMacroDefinitions(PPOpts, ASTFileMacros);
MacroDefinitionsMap ExistingMacros;
SmallVector<StringRef, 4> ExistingMacroNames;
collectMacroDefinitions(ExistingPPOpts, ExistingMacros, &ExistingMacroNames);

for (unsigned I = 0, N = ExistingMacroNames.size(); I != N; ++I) {
  // Dig out the macro definition in the existing preprocessor options.
  StringRef MacroName = ExistingMacroNames[I];
  std::pair<StringRef, bool> Existing = ExistingMacros[MacroName];

  // Check whether we know anything about this macro name or not.
  llvm::StringMap<std::pair<StringRef, bool /*IsUndef*/>>::iterator Known =
      ASTFileMacros.find(MacroName);
  if (!Validate || Known == ASTFileMacros.end()) {
    // FIXME: Check whether this identifier was referenced anywhere in the
    // AST file. If so, we should reject the AST file. Unfortunately, this
    // information isn't in the control block. What shall we do about it?

    if (Existing.second) {
      SuggestedPredefines += "#undef ";
      SuggestedPredefines += MacroName.str();
      SuggestedPredefines += '\n';
    } else {
      SuggestedPredefines += "#define ";
      SuggestedPredefines += MacroName.str();
      SuggestedPredefines += ' ';
      SuggestedPredefines += Existing.first.str();
      SuggestedPredefines += '\n';
    }
    continue;
  }

  // If the macro was defined in one but undef'd in the other, we have a
  // conflict.
  if (Existing.second != Known->second.second) {
    if (Diags) {
      Diags->Report(diag::err_pch_macro_def_undef)
        << MacroName << Known->second.second;
    }
    return true;
  }

  // If the macro was #undef'd in both, or if the macro bodies are identical,
  // it's fine.
  if (Existing.second || Existing.first == Known->second.first)
    continue;

  // The macro bodies differ; complain.
  if (Diags) {
    Diags->Report(diag::err_pch_macro_def_conflict)
      << MacroName << Known->second.first << Existing.first;
  }
  return true;
}

// Check whether we're using predefines.
if (PPOpts.UsePredefines != ExistingPPOpts.UsePredefines && Validate) {
  if (Diags) {
    Diags->Report(diag::err_pch_undef) << ExistingPPOpts.UsePredefines;
  }
  return true;
}

// Detailed record is important since it is used for the module cache hash.
if (LangOpts.Modules &&
    PPOpts.DetailedRecord != ExistingPPOpts.DetailedRecord && Validate) {
  if (Diags) {
    Diags->Report(diag::err_pch_pp_detailed_record) << PPOpts.DetailedRecord;
  }
  return true;
}

// Compute the #include and #include_macros lines we need.
for (unsigned I = 0, N = ExistingPPOpts.Includes.size(); I != N; ++I) {
  StringRef File = ExistingPPOpts.Includes[I];

  if (!ExistingPPOpts.ImplicitPCHInclude.empty() &&
      !ExistingPPOpts.PCHThroughHeader.empty()) {
    // In case the through header is an include, we must add all the includes
    // to the predefines so the start point can be determined.
    SuggestedPredefines += "#include \"";
    SuggestedPredefines += File;
    SuggestedPredefines += "\"\n";
    continue;
  }

  if (File == ExistingPPOpts.ImplicitPCHInclude)
    continue;

  if (std::find(PPOpts.Includes.begin(), PPOpts.Includes.end(), File)
        != PPOpts.Includes.end())
    continue;

  SuggestedPredefines += "#include \"";
  SuggestedPredefines += File;
  SuggestedPredefines += "\"\n";
}

for (unsigned I = 0, N = ExistingPPOpts.MacroIncludes.size(); I != N; ++I) {
  StringRef File = ExistingPPOpts.MacroIncludes[I];
  if (std::find(PPOpts.MacroIncludes.begin(), PPOpts.MacroIncludes.end(),
                File)
      != PPOpts.MacroIncludes.end())
    continue;

  SuggestedPredefines += "#__include_macros \"";
  SuggestedPredefines += File;
  SuggestedPredefines += "\"\n##\n";
}

return false;
743}

745bool PCHValidator::ReadPreprocessorOptions(const PreprocessorOptions &PPOpts,
                                         bool Complain,
                                         std::string &SuggestedPredefines) {
const PreprocessorOptions &ExistingPPOpts = PP.getPreprocessorOpts();

return checkPreprocessorOptions(PPOpts, ExistingPPOpts,
                                Complain? &Reader.Diags : nullptr,
                                PP.getFileManager(),
                                SuggestedPredefines,
                                PP.getLangOpts());
755}

757bool SimpleASTReaderListener::ReadPreprocessorOptions(
                                const PreprocessorOptions &PPOpts,
                                bool Complain,
                                std::string &SuggestedPredefines) {
return checkPreprocessorOptions(PPOpts,
                                PP.getPreprocessorOpts(),
                                nullptr,
                                PP.getFileManager(),
                                SuggestedPredefines,
                                PP.getLangOpts(),
                                false);
768}

770/// Check the header search options deserialized from the control block
771/// against the header search options in an existing preprocessor.
772///
773/// \param Diags If non-null, produce diagnostics for any mismatches incurred.
774static bool checkHeaderSearchOptions(const HeaderSearchOptions &HSOpts,
                                   StringRef SpecificModuleCachePath,
                                   StringRef ExistingModuleCachePath,
                                   DiagnosticsEngine *Diags,
                                   const LangOptions &LangOpts) {
if (LangOpts.Modules) {
  if (SpecificModuleCachePath != ExistingModuleCachePath) {
    if (Diags)
      Diags->Report(diag::err_pch_modulecache_mismatch)
        << SpecificModuleCachePath << ExistingModuleCachePath;
    return true;
  }
}

return false;
789}

791bool PCHValidator::ReadHeaderSearchOptions(const HeaderSearchOptions &HSOpts,
                                         StringRef SpecificModuleCachePath,
                                         bool Complain) {
return checkHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
                                PP.getHeaderSearchInfo().getModuleCachePath(),
                                Complain ? &Reader.Diags : nullptr,
                                PP.getLangOpts());
798}

800void PCHValidator::ReadCounter(const ModuleFile &M, unsigned Value) {
PP.setCounterValue(Value);
802}

804//===----------------------------------------------------------------------===//
805// AST reader implementation
806//===----------------------------------------------------------------------===//

808void ASTReader::setDeserializationListener(ASTDeserializationListener *Listener,
                                         bool TakeOwnership) {
DeserializationListener = Listener;
OwnsDeserializationListener = TakeOwnership;
812}

814unsigned ASTSelectorLookupTrait::ComputeHash(Selector Sel) {
return serialization::ComputeHash(Sel);
816}

818std::pair<unsigned, unsigned>
819ASTSelectorLookupTrait::ReadKeyDataLength(const unsigned char*& d) {
using namespace llvm::support;

unsigned KeyLen = endian::readNext<uint16_t, little, unaligned>(d);
unsigned DataLen = endian::readNext<uint16_t, little, unaligned>(d);
return std::make_pair(KeyLen, DataLen);
825}

827ASTSelectorLookupTrait::internal_key_type
828ASTSelectorLookupTrait::ReadKey(const unsigned char* d, unsigned) {
using namespace llvm::support;

SelectorTable &SelTable = Reader.getContext().Selectors;
unsigned N = endian::readNext<uint16_t, little, unaligned>(d);
IdentifierInfo *FirstII = Reader.getLocalIdentifier(
    F, endian::readNext<uint32_t, little, unaligned>(d));
if (N == 0)
  return SelTable.getNullarySelector(FirstII);
else if (N == 1)
  return SelTable.getUnarySelector(FirstII);

SmallVector<IdentifierInfo *, 16> Args;
Args.push_back(FirstII);
for (unsigned I = 1; I != N; ++I)
  Args.push_back(Reader.getLocalIdentifier(
      F, endian::readNext<uint32_t, little, unaligned>(d)));

return SelTable.getSelector(N, Args.data());
847}

849ASTSelectorLookupTrait::data_type
850ASTSelectorLookupTrait::ReadData(Selector, const unsigned char* d,
                               unsigned DataLen) {
using namespace llvm::support;

data_type Result;

Result.ID = Reader.getGlobalSelectorID(
    F, endian::readNext<uint32_t, little, unaligned>(d));
unsigned FullInstanceBits = endian::readNext<uint16_t, little, unaligned>(d);
unsigned FullFactoryBits = endian::readNext<uint16_t, little, unaligned>(d);
Result.InstanceBits = FullInstanceBits & 0x3;
Result.InstanceHasMoreThanOneDecl = (FullInstanceBits >> 2) & 0x1;
Result.FactoryBits = FullFactoryBits & 0x3;
Result.FactoryHasMoreThanOneDecl = (FullFactoryBits >> 2) & 0x1;
unsigned NumInstanceMethods = FullInstanceBits >> 3;
unsigned NumFactoryMethods = FullFactoryBits >> 3;

// Load instance methods
for (unsigned I = 0; I != NumInstanceMethods; ++I) {
  if (ObjCMethodDecl *Method = Reader.GetLocalDeclAs<ObjCMethodDecl>(
          F, endian::readNext<uint32_t, little, unaligned>(d)))
    Result.Instance.push_back(Method);
}

// Load factory methods
for (unsigned I = 0; I != NumFactoryMethods; ++I) {
  if (ObjCMethodDecl *Method = Reader.GetLocalDeclAs<ObjCMethodDecl>(
          F, endian::readNext<uint32_t, little, unaligned>(d)))
    Result.Factory.push_back(Method);
}

return Result;
882}

884unsigned ASTIdentifierLookupTraitBase::ComputeHash(const internal_key_type& a) {
return llvm::djbHash(a);
886}

888std::pair<unsigned, unsigned>
889ASTIdentifierLookupTraitBase::ReadKeyDataLength(const unsigned char*& d) {
using namespace llvm::support;

unsigned DataLen = endian::readNext<uint16_t, little, unaligned>(d);
unsigned KeyLen = endian::readNext<uint16_t, little, unaligned>(d);
return std::make_pair(KeyLen, DataLen);
895}

897ASTIdentifierLookupTraitBase::internal_key_type
898ASTIdentifierLookupTraitBase::ReadKey(const unsigned char* d, unsigned n) {
assert(n >= 2 && d[n-1] == '\0')((n >= 2 && d[n-1] == '\0') ? static_cast<void>
 (0) : __assert_fail ("n >= 2 && d[n-1] == '\\0'",
 "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 899, __PRETTY_FUNCTION__));
return StringRef((const char*) d, n-1);
901}

903/// Whether the given identifier is "interesting".
904static bool isInterestingIdentifier(ASTReader &Reader, IdentifierInfo &II,
                                  bool IsModule) {
return II.hadMacroDefinition() ||
       II.isPoisoned() ||
       (IsModule ? II.hasRevertedBuiltin() : II.getObjCOrBuiltinID()) ||
       II.hasRevertedTokenIDToIdentifier() ||
       (!(IsModule && Reader.getPreprocessor().getLangOpts().CPlusPlus) &&
        II.getFETokenInfo());
912}

914static bool readBit(unsigned &Bits) {
bool Value = Bits & 0x1;
Bits >>= 1;
return Value;
918}

920IdentID ASTIdentifierLookupTrait::ReadIdentifierID(const unsigned char *d) {
using namespace llvm::support;

unsigned RawID = endian::readNext<uint32_t, little, unaligned>(d);
return Reader.getGlobalIdentifierID(F, RawID >> 1);
925}

927static void markIdentifierFromAST(ASTReader &Reader, IdentifierInfo &II) {
if (!II.isFromAST()) {
  II.setIsFromAST();
  bool IsModule = Reader.getPreprocessor().getCurrentModule() != nullptr;
  if (isInterestingIdentifier(Reader, II, IsModule))
    II.setChangedSinceDeserialization();
}
934}

936IdentifierInfo *ASTIdentifierLookupTrait::ReadData(const internal_key_type& k,
                                                 const unsigned char* d,
                                                 unsigned DataLen) {
using namespace llvm::support;

unsigned RawID = endian::readNext<uint32_t, little, unaligned>(d);
bool IsInteresting = RawID & 0x01;

// Wipe out the "is interesting" bit.
RawID = RawID >> 1;

// Build the IdentifierInfo and link the identifier ID with it.
IdentifierInfo *II = KnownII;
if (!II) {
  II = &Reader.getIdentifierTable().getOwn(k);
  KnownII = II;
}
markIdentifierFromAST(Reader, *II);
Reader.markIdentifierUpToDate(II);

IdentID ID = Reader.getGlobalIdentifierID(F, RawID);
if (!IsInteresting) {
  // For uninteresting identifiers, there's nothing else to do. Just notify
  // the reader that we've finished loading this identifier.
  Reader.SetIdentifierInfo(ID, II);
  return II;
}

unsigned ObjCOrBuiltinID = endian::readNext<uint16_t, little, unaligned>(d);
unsigned Bits = endian::readNext<uint16_t, little, unaligned>(d);
bool CPlusPlusOperatorKeyword = readBit(Bits);
bool HasRevertedTokenIDToIdentifier = readBit(Bits);
bool HasRevertedBuiltin = readBit(Bits);
bool Poisoned = readBit(Bits);
bool ExtensionToken = readBit(Bits);
bool HadMacroDefinition = readBit(Bits);

assert(Bits == 0 && "Extra bits in the identifier?")((Bits == 0 && "Extra bits in the identifier?") ? static_cast
<void> (0) : __assert_fail ("Bits == 0 && \"Extra bits in the identifier?\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 973, __PRETTY_FUNCTION__));
DataLen -= 8;

// Set or check the various bits in the IdentifierInfo structure.
// Token IDs are read-only.
if (HasRevertedTokenIDToIdentifier && II->getTokenID() != tok::identifier)
  II->revertTokenIDToIdentifier();
if (!F.isModule())
  II->setObjCOrBuiltinID(ObjCOrBuiltinID);
else if (HasRevertedBuiltin && II->getBuiltinID()) {
  II->revertBuiltin();
  assert((II->hasRevertedBuiltin() ||(((II->hasRevertedBuiltin() || II->getObjCOrBuiltinID()
 == ObjCOrBuiltinID) && "Incorrect ObjC keyword or builtin ID"
) ? static_cast<void> (0) : __assert_fail ("(II->hasRevertedBuiltin() || II->getObjCOrBuiltinID() == ObjCOrBuiltinID) && \"Incorrect ObjC keyword or builtin ID\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 986, __PRETTY_FUNCTION__))
          II->getObjCOrBuiltinID() == ObjCOrBuiltinID) &&(((II->hasRevertedBuiltin() || II->getObjCOrBuiltinID()
 == ObjCOrBuiltinID) && "Incorrect ObjC keyword or builtin ID"
) ? static_cast<void> (0) : __assert_fail ("(II->hasRevertedBuiltin() || II->getObjCOrBuiltinID() == ObjCOrBuiltinID) && \"Incorrect ObjC keyword or builtin ID\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 986, __PRETTY_FUNCTION__))
         "Incorrect ObjC keyword or builtin ID")(((II->hasRevertedBuiltin() || II->getObjCOrBuiltinID()
 == ObjCOrBuiltinID) && "Incorrect ObjC keyword or builtin ID"
) ? static_cast<void> (0) : __assert_fail ("(II->hasRevertedBuiltin() || II->getObjCOrBuiltinID() == ObjCOrBuiltinID) && \"Incorrect ObjC keyword or builtin ID\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 986, __PRETTY_FUNCTION__));
}
assert(II->isExtensionToken() == ExtensionToken &&((II->isExtensionToken() == ExtensionToken && "Incorrect extension token flag"
) ? static_cast<void> (0) : __assert_fail ("II->isExtensionToken() == ExtensionToken && \"Incorrect extension token flag\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 989, __PRETTY_FUNCTION__))
       "Incorrect extension token flag")((II->isExtensionToken() == ExtensionToken && "Incorrect extension token flag"
) ? static_cast<void> (0) : __assert_fail ("II->isExtensionToken() == ExtensionToken && \"Incorrect extension token flag\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 989, __PRETTY_FUNCTION__));
(void)ExtensionToken;
if (Poisoned)
  II->setIsPoisoned(true);
assert(II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword &&((II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword
 && "Incorrect C++ operator keyword flag") ? static_cast
<void> (0) : __assert_fail ("II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword && \"Incorrect C++ operator keyword flag\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 994, __PRETTY_FUNCTION__))
       "Incorrect C++ operator keyword flag")((II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword
 && "Incorrect C++ operator keyword flag") ? static_cast
<void> (0) : __assert_fail ("II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword && \"Incorrect C++ operator keyword flag\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 994, __PRETTY_FUNCTION__));
(void)CPlusPlusOperatorKeyword;

// If this identifier is a macro, deserialize the macro
// definition.
if (HadMacroDefinition) {
  uint32_t MacroDirectivesOffset =
      endian::readNext<uint32_t, little, unaligned>(d);
  DataLen -= 4;

  Reader.addPendingMacro(II, &F, MacroDirectivesOffset);
}

Reader.SetIdentifierInfo(ID, II);

// Read all of the declarations visible at global scope with this
// name.
if (DataLen > 0) {
  SmallVector<uint32_t, 4> DeclIDs;
  for (; DataLen > 0; DataLen -= 4)
    DeclIDs.push_back(Reader.getGlobalDeclID(
        F, endian::readNext<uint32_t, little, unaligned>(d)));
  Reader.SetGloballyVisibleDecls(II, DeclIDs);
}

return II;
1020}

1022DeclarationNameKey::DeclarationNameKey(DeclarationName Name)
  : Kind(Name.getNameKind()) {
switch (Kind) {
case DeclarationName::Identifier:
  Data = (uint64_t)Name.getAsIdentifierInfo();
  break;
case DeclarationName::ObjCZeroArgSelector:
case DeclarationName::ObjCOneArgSelector:
case DeclarationName::ObjCMultiArgSelector:
  Data = (uint64_t)Name.getObjCSelector().getAsOpaquePtr();
  break;
case DeclarationName::CXXOperatorName:
  Data = Name.getCXXOverloadedOperator();
  break;
case DeclarationName::CXXLiteralOperatorName:
  Data = (uint64_t)Name.getCXXLiteralIdentifier();
  break;
case DeclarationName::CXXDeductionGuideName:
  Data = (uint64_t)Name.getCXXDeductionGuideTemplate()
             ->getDeclName().getAsIdentifierInfo();
  break;
case DeclarationName::CXXConstructorName:
case DeclarationName::CXXDestructorName:
case DeclarationName::CXXConversionFunctionName:
case DeclarationName::CXXUsingDirective:
  Data = 0;
  break;
}
1050}

1052unsigned DeclarationNameKey::getHash() const {
llvm::FoldingSetNodeID ID;
ID.AddInteger(Kind);

switch (Kind) {
case DeclarationName::Identifier:
case DeclarationName::CXXLiteralOperatorName:
case DeclarationName::CXXDeductionGuideName:
  ID.AddString(((IdentifierInfo*)Data)->getName());
  break;
case DeclarationName::ObjCZeroArgSelector:
case DeclarationName::ObjCOneArgSelector:
case DeclarationName::ObjCMultiArgSelector:
  ID.AddInteger(serialization::ComputeHash(Selector(Data)));
  break;
case DeclarationName::CXXOperatorName:
  ID.AddInteger((OverloadedOperatorKind)Data);
  break;
case DeclarationName::CXXConstructorName:
case DeclarationName::CXXDestructorName:
case DeclarationName::CXXConversionFunctionName:
case DeclarationName::CXXUsingDirective:
  break;
}

return ID.ComputeHash();
1078}

1080ModuleFile *
1081ASTDeclContextNameLookupTrait::ReadFileRef(const unsigned char *&d) {
using namespace llvm::support;

uint32_t ModuleFileID = endian::readNext<uint32_t, little, unaligned>(d);
return Reader.getLocalModuleFile(F, ModuleFileID);
1086}

1088std::pair<unsigned, unsigned>
1089ASTDeclContextNameLookupTrait::ReadKeyDataLength(const unsigned char *&d) {
using namespace llvm::support;

unsigned KeyLen = endian::readNext<uint16_t, little, unaligned>(d);
unsigned DataLen = endian::readNext<uint16_t, little, unaligned>(d);
return std::make_pair(KeyLen, DataLen);
1095}

1097ASTDeclContextNameLookupTrait::internal_key_type
1098ASTDeclContextNameLookupTrait::ReadKey(const unsigned char *d, unsigned) {
using namespace llvm::support;

auto Kind = (DeclarationName::NameKind)*d++;
uint64_t Data;
switch (Kind) {
case DeclarationName::Identifier:
case DeclarationName::CXXLiteralOperatorName:
case DeclarationName::CXXDeductionGuideName:
  Data = (uint64_t)Reader.getLocalIdentifier(
      F, endian::readNext<uint32_t, little, unaligned>(d));
  break;
case DeclarationName::ObjCZeroArgSelector:
case DeclarationName::ObjCOneArgSelector:
case DeclarationName::ObjCMultiArgSelector:
  Data =
      (uint64_t)Reader.getLocalSelector(
                           F, endian::readNext<uint32_t, little, unaligned>(
                                  d)).getAsOpaquePtr();
  break;
case DeclarationName::CXXOperatorName:
  Data = *d++; // OverloadedOperatorKind
  break;
case DeclarationName::CXXConstructorName:
case DeclarationName::CXXDestructorName:
case DeclarationName::CXXConversionFunctionName:
case DeclarationName::CXXUsingDirective:
  Data = 0;
  break;
}

return DeclarationNameKey(Kind, Data);
1130}

1132void ASTDeclContextNameLookupTrait::ReadDataInto(internal_key_type,
                                               const unsigned char *d,
                                               unsigned DataLen,
                                               data_type_builder &Val) {
using namespace llvm::support;

for (unsigned NumDecls = DataLen / 4; NumDecls; --NumDecls) {
  uint32_t LocalID = endian::readNext<uint32_t, little, unaligned>(d);
  Val.insert(Reader.getGlobalDeclID(F, LocalID));
}
1142}

1144bool ASTReader::ReadLexicalDeclContextStorage(ModuleFile &M,
                                            BitstreamCursor &Cursor,
                                            uint64_t Offset,
                                            DeclContext *DC) {
assert(Offset != 0)((Offset != 0) ? static_cast<void> (0) : __assert_fail (
"Offset != 0", "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 1148, __PRETTY_FUNCTION__));

SavedStreamPosition SavedPosition(Cursor);
if (llvm::Error Err = Cursor.JumpToBit(Offset)) {
  Error(std::move(Err));
  return true;
}

RecordData Record;
StringRef Blob;
Expected<unsigned> MaybeCode = Cursor.ReadCode();
if (!MaybeCode) {
  Error(MaybeCode.takeError());
  return true;
}
unsigned Code = MaybeCode.get();

Expected<unsigned> MaybeRecCode = Cursor.readRecord(Code, Record, &Blob);
if (!MaybeRecCode) {
  Error(MaybeRecCode.takeError());
  return true;
}
unsigned RecCode = MaybeRecCode.get();
if (RecCode != DECL_CONTEXT_LEXICAL) {
  Error("Expected lexical block");
  return true;
}

assert(!isa<TranslationUnitDecl>(DC) &&((!isa<TranslationUnitDecl>(DC) && "expected a TU_UPDATE_LEXICAL record for TU"
) ? static_cast<void> (0) : __assert_fail ("!isa<TranslationUnitDecl>(DC) && \"expected a TU_UPDATE_LEXICAL record for TU\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 1177, __PRETTY_FUNCTION__))
       "expected a TU_UPDATE_LEXICAL record for TU")((!isa<TranslationUnitDecl>(DC) && "expected a TU_UPDATE_LEXICAL record for TU"
) ? static_cast<void> (0) : __assert_fail ("!isa<TranslationUnitDecl>(DC) && \"expected a TU_UPDATE_LEXICAL record for TU\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 1177, __PRETTY_FUNCTION__));
// If we are handling a C++ class template instantiation, we can see multiple
// lexical updates for the same record. It's important that we select only one
// of them, so that field numbering works properly. Just pick the first one we
// see.
auto &Lex = LexicalDecls[DC];
if (!Lex.first) {
  Lex = std::make_pair(
      &M, llvm::makeArrayRef(
              reinterpret_cast<const llvm::support::unaligned_uint32_t *>(
                  Blob.data()),
              Blob.size() / 4));
}
DC->setHasExternalLexicalStorage(true);
return false;
1192}

1194bool ASTReader::ReadVisibleDeclContextStorage(ModuleFile &M,
                                            BitstreamCursor &Cursor,
                                            uint64_t Offset,
                                            DeclID ID) {
assert(Offset != 0)((Offset != 0) ? static_cast<void> (0) : __assert_fail (
"Offset != 0", "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 1198, __PRETTY_FUNCTION__));

SavedStreamPosition SavedPosition(Cursor);
if (llvm::Error Err = Cursor.JumpToBit(Offset)) {
  Error(std::move(Err));
  return true;
}

RecordData Record;
StringRef Blob;
Expected<unsigned> MaybeCode = Cursor.ReadCode();
if (!MaybeCode) {
  Error(MaybeCode.takeError());
  return true;
}
unsigned Code = MaybeCode.get();

Expected<unsigned> MaybeRecCode = Cursor.readRecord(Code, Record, &Blob);
if (!MaybeRecCode) {
  Error(MaybeRecCode.takeError());
  return true;
}
unsigned RecCode = MaybeRecCode.get();
if (RecCode != DECL_CONTEXT_VISIBLE) {
  Error("Expected visible lookup table block");
  return true;
}

// We can't safely determine the primary context yet, so delay attaching the
// lookup table until we're done with recursive deserialization.
auto *Data = (const unsigned char*)Blob.data();
PendingVisibleUpdates[ID].push_back(PendingVisibleUpdate{&M, Data});
return false;
1231}

1233void ASTReader::Error(StringRef Msg) const {
Error(diag::err_fe_pch_malformed, Msg);
if (PP.getLangOpts().Modules && !Diags.isDiagnosticInFlight() &&
    !PP.getHeaderSearchInfo().getModuleCachePath().empty()) {
  Diag(diag::note_module_cache_path)
    << PP.getHeaderSearchInfo().getModuleCachePath();
}
1240}

1242void ASTReader::Error(unsigned DiagID,
                    StringRef Arg1, StringRef Arg2) const {
if (Diags.isDiagnosticInFlight())
  Diags.SetDelayedDiagnostic(DiagID, Arg1, Arg2);
else
  Diag(DiagID) << Arg1 << Arg2;
1248}

1250void ASTReader::Error(llvm::Error &&Err) const {
Error(toString(std::move(Err)));
1252}

1254//===----------------------------------------------------------------------===//
1255// Source Manager Deserialization
1256//===----------------------------------------------------------------------===//

1258/// Read the line table in the source manager block.
1259/// \returns true if there was an error.
1260bool ASTReader::ParseLineTable(ModuleFile &F,
                             const RecordData &Record) {
unsigned Idx = 0;
LineTableInfo &LineTable = SourceMgr.getLineTable();

// Parse the file names
std::map<int, int> FileIDs;
FileIDs[-1] = -1; // For unspecified filenames.
for (unsigned I = 0; Record[Idx]; ++I) {
  // Extract the file name
  auto Filename = ReadPath(F, Record, Idx);
  FileIDs[I] = LineTable.getLineTableFilenameID(Filename);
}
++Idx;

// Parse the line entries
std::vector<LineEntry> Entries;
while (Idx < Record.size()) {
  int FID = Record[Idx++];
  assert(FID >= 0 && "Serialized line entries for non-local file.")((FID >= 0 && "Serialized line entries for non-local file."
) ? static_cast<void> (0) : __assert_fail ("FID >= 0 && \"Serialized line entries for non-local file.\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 1279, __PRETTY_FUNCTION__));
  // Remap FileID from 1-based old view.
  FID += F.SLocEntryBaseID - 1;

  // Extract the line entries
  unsigned NumEntries = Record[Idx++];
  assert(NumEntries && "no line entries for file ID")((NumEntries && "no line entries for file ID") ? static_cast
<void> (0) : __assert_fail ("NumEntries && \"no line entries for file ID\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 1285, __PRETTY_FUNCTION__));
  Entries.clear();
  Entries.reserve(NumEntries);
  for (unsigned I = 0; I != NumEntries; ++I) {
    unsigned FileOffset = Record[Idx++];
    unsigned LineNo = Record[Idx++];
    int FilenameID = FileIDs[Record[Idx++]];
    SrcMgr::CharacteristicKind FileKind
      = (SrcMgr::CharacteristicKind)Record[Idx++];
    unsigned IncludeOffset = Record[Idx++];
    Entries.push_back(LineEntry::get(FileOffset, LineNo, FilenameID,
                                     FileKind, IncludeOffset));
  }
  LineTable.AddEntry(FileID::get(FID), Entries);
}

return false;
1302}

1304/// Read a source manager block
1305bool ASTReader::ReadSourceManagerBlock(ModuleFile &F) {
using namespace SrcMgr;

BitstreamCursor &SLocEntryCursor = F.SLocEntryCursor;

// Set the source-location entry cursor to the current position in
// the stream. This cursor will be used to read the contents of the
// source manager block initially, and then lazily read
// source-location entries as needed.
SLocEntryCursor = F.Stream;

// The stream itself is going to skip over the source manager block.
if (llvm::Error Err = F.Stream.SkipBlock()) {
  Error(std::move(Err));
  return true;
}

// Enter the source manager block.
if (llvm::Error Err =
        SLocEntryCursor.EnterSubBlock(SOURCE_MANAGER_BLOCK_ID)) {
  Error(std::move(Err));
  return true;
}

RecordData Record;
while (true) {
  Expected<llvm::BitstreamEntry> MaybeE =
      SLocEntryCursor.advanceSkippingSubblocks();
  if (!MaybeE) {
    Error(MaybeE.takeError());
    return true;
  }
  llvm::BitstreamEntry E = MaybeE.get();

  switch (E.Kind) {
  case llvm::BitstreamEntry::SubBlock: // Handled for us already.
  case llvm::BitstreamEntry::Error:
    Error("malformed block record in AST file");
    return true;
  case llvm::BitstreamEntry::EndBlock:
    return false;
  case llvm::BitstreamEntry::Record:
    // The interesting case.
    break;
  }

  // Read a record.
  Record.clear();
  StringRef Blob;
  Expected<unsigned> MaybeRecord =
      SLocEntryCursor.readRecord(E.ID, Record, &Blob);
  if (!MaybeRecord) {
    Error(MaybeRecord.takeError());
    return true;
  }
  switch (MaybeRecord.get()) {
  default:  // Default behavior: ignore.
    break;

  case SM_SLOC_FILE_ENTRY:
  case SM_SLOC_BUFFER_ENTRY:
  case SM_SLOC_EXPANSION_ENTRY:
    // Once we hit one of the source location entries, we're done.
    return false;
  }
}
1371}

1373/// If a header file is not found at the path that we expect it to be
1374/// and the PCH file was moved from its original location, try to resolve the
1375/// file by assuming that header+PCH were moved together and the header is in
1376/// the same place relative to the PCH.
1377static std::string
1378resolveFileRelativeToOriginalDir(const std::string &Filename,
                               const std::string &OriginalDir,
                               const std::string &CurrDir) {
assert(OriginalDir != CurrDir &&((OriginalDir != CurrDir && "No point trying to resolve the file if the PCH dir didn't change"
) ? static_cast<void> (0) : __assert_fail ("OriginalDir != CurrDir && \"No point trying to resolve the file if the PCH dir didn't change\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 1382, __PRETTY_FUNCTION__))
       "No point trying to resolve the file if the PCH dir didn't change")((OriginalDir != CurrDir && "No point trying to resolve the file if the PCH dir didn't change"
) ? static_cast<void> (0) : __assert_fail ("OriginalDir != CurrDir && \"No point trying to resolve the file if the PCH dir didn't change\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 1382, __PRETTY_FUNCTION__));

using namespace llvm::sys;

SmallString<128> filePath(Filename);
fs::make_absolute(filePath);
assert(path::is_absolute(OriginalDir))((path::is_absolute(OriginalDir)) ? static_cast<void> (
0) : __assert_fail ("path::is_absolute(OriginalDir)", "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 1388, __PRETTY_FUNCTION__));
SmallString<128> currPCHPath(CurrDir);

path::const_iterator fileDirI = path::begin(path::parent_path(filePath)),
                     fileDirE = path::end(path::parent_path(filePath));
path::const_iterator origDirI = path::begin(OriginalDir),
                     origDirE = path::end(OriginalDir);
// Skip the common path components from filePath and OriginalDir.
while (fileDirI != fileDirE && origDirI != origDirE &&
       *fileDirI == *origDirI) {
  ++fileDirI;
  ++origDirI;
}
for (; origDirI != origDirE; ++origDirI)
  path::append(currPCHPath, "..");
path::append(currPCHPath, fileDirI, fileDirE);
path::append(currPCHPath, path::filename(Filename));
return currPCHPath.str();
1406}

1408bool ASTReader::ReadSLocEntry(int ID) {
if (ID == 0)
  return false;

if (unsigned(-ID) - 2 >= getTotalNumSLocs() || ID > 0) {
  Error("source location entry ID out-of-range for AST file");
  return true;
}

// Local helper to read the (possibly-compressed) buffer data following the
// entry record.
auto ReadBuffer = [this](
    BitstreamCursor &SLocEntryCursor,
    StringRef Name) -> std::unique_ptr<llvm::MemoryBuffer> {
  RecordData Record;
  StringRef Blob;
  Expected<unsigned> MaybeCode = SLocEntryCursor.ReadCode();
  if (!MaybeCode) {
    Error(MaybeCode.takeError());
    return nullptr;
  }
  unsigned Code = MaybeCode.get();

  Expected<unsigned> MaybeRecCode =
      SLocEntryCursor.readRecord(Code, Record, &Blob);
  if (!MaybeRecCode) {
    Error(MaybeRecCode.takeError());
    return nullptr;
  }
  unsigned RecCode = MaybeRecCode.get();

  if (RecCode == SM_SLOC_BUFFER_BLOB_COMPRESSED) {
    if (!llvm::zlib::isAvailable()) {
      Error("zlib is not available");
      return nullptr;
    }
    SmallString<0> Uncompressed;
    if (llvm::Error E =
            llvm::zlib::uncompress(Blob, Uncompressed, Record[0])) {
      Error("could not decompress embedded file contents: " +
            llvm::toString(std::move(E)));
      return nullptr;
    }
    return llvm::MemoryBuffer::getMemBufferCopy(Uncompressed, Name);
  } else if (RecCode == SM_SLOC_BUFFER_BLOB) {
    return llvm::MemoryBuffer::getMemBuffer(Blob.drop_back(1), Name, true);
  } else {
    Error("AST record has invalid code");
    return nullptr;
  }
};

ModuleFile *F = GlobalSLocEntryMap.find(-ID)->second;
if (llvm::Error Err = F->SLocEntryCursor.JumpToBit(
        F->SLocEntryOffsets[ID - F->SLocEntryBaseID])) {
  Error(std::move(Err));
  return true;
}

BitstreamCursor &SLocEntryCursor = F->SLocEntryCursor;
unsigned BaseOffset = F->SLocEntryBaseOffset;

++NumSLocEntriesRead;
Expected<llvm::BitstreamEntry> MaybeEntry = SLocEntryCursor.advance();
if (!MaybeEntry) {
  Error(MaybeEntry.takeError());
  return true;
}
llvm::BitstreamEntry Entry = MaybeEntry.get();

if (Entry.Kind != llvm::BitstreamEntry::Record) {
  Error("incorrectly-formatted source location entry in AST file");
  return true;
}

RecordData Record;
StringRef Blob;
Expected<unsigned> MaybeSLOC =
    SLocEntryCursor.readRecord(Entry.ID, Record, &Blob);
if (!MaybeSLOC) {
  Error(MaybeSLOC.takeError());
  return true;
}
switch (MaybeSLOC.get()) {
default:
  Error("incorrectly-formatted source location entry in AST file");
  return true;

case SM_SLOC_FILE_ENTRY: {
  // We will detect whether a file changed and return 'Failure' for it, but
  // we will also try to fail gracefully by setting up the SLocEntry.
  unsigned InputID = Record[4];
  InputFile IF = getInputFile(*F, InputID);
  const FileEntry *File = IF.getFile();
  bool OverriddenBuffer = IF.isOverridden();

  // Note that we only check if a File was returned. If it was out-of-date
  // we have complained but we will continue creating a FileID to recover
  // gracefully.
  if (!File)
    return true;

  SourceLocation IncludeLoc = ReadSourceLocation(*F, Record[1]);
  if (IncludeLoc.isInvalid() && F->Kind != MK_MainFile) {
    // This is the module's main file.
    IncludeLoc = getImportLocation(F);
  }
  SrcMgr::CharacteristicKind
    FileCharacter = (SrcMgr::CharacteristicKind)Record[2];
  // FIXME: The FileID should be created from the FileEntryRef.
  FileID FID = SourceMgr.createFileID(File, IncludeLoc, FileCharacter,
                                      ID, BaseOffset + Record[0]);
  SrcMgr::FileInfo &FileInfo =
        const_cast<SrcMgr::FileInfo&>(SourceMgr.getSLocEntry(FID).getFile());
  FileInfo.NumCreatedFIDs = Record[5];
  if (Record[3])
    FileInfo.setHasLineDirectives();

  const DeclID *FirstDecl = F->FileSortedDecls + Record[6];
  unsigned NumFileDecls = Record[7];
  if (NumFileDecls && ContextObj) {
    assert(F->FileSortedDecls && "FILE_SORTED_DECLS not encountered yet ?")((F->FileSortedDecls && "FILE_SORTED_DECLS not encountered yet ?"
) ? static_cast<void> (0) : __assert_fail ("F->FileSortedDecls && \"FILE_SORTED_DECLS not encountered yet ?\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 1529, __PRETTY_FUNCTION__));
    FileDeclIDs[FID] = FileDeclsInfo(F, llvm::makeArrayRef(FirstDecl,
                                                           NumFileDecls));
  }

  const SrcMgr::ContentCache *ContentCache
    = SourceMgr.getOrCreateContentCache(File, isSystem(FileCharacter));
  if (OverriddenBuffer && !ContentCache->BufferOverridden &&
      ContentCache->ContentsEntry == ContentCache->OrigEntry &&
      !ContentCache->getRawBuffer()) {
    auto Buffer = ReadBuffer(SLocEntryCursor, File->getName());
    if (!Buffer)
      return true;
    SourceMgr.overrideFileContents(File, std::move(Buffer));
  }

  break;
}

case SM_SLOC_BUFFER_ENTRY: {
  const char *Name = Blob.data();
  unsigned Offset = Record[0];
  SrcMgr::CharacteristicKind
    FileCharacter = (SrcMgr::CharacteristicKind)Record[2];
  SourceLocation IncludeLoc = ReadSourceLocation(*F, Record[1]);
  if (IncludeLoc.isInvalid() && F->isModule()) {
    IncludeLoc = getImportLocation(F);
  }

  auto Buffer = ReadBuffer(SLocEntryCursor, Name);
  if (!Buffer)
    return true;
  SourceMgr.createFileID(std::move(Buffer), FileCharacter, ID,
                         BaseOffset + Offset, IncludeLoc);
  break;
}

case SM_SLOC_EXPANSION_ENTRY: {
  SourceLocation SpellingLoc = ReadSourceLocation(*F, Record[1]);
  SourceMgr.createExpansionLoc(SpellingLoc,
                                   ReadSourceLocation(*F, Record[2]),
                                   ReadSourceLocation(*F, Record[3]),
                                   Record[5],
                                   Record[4],
                                   ID,
                                   BaseOffset + Record[0]);
  break;
}
}

return false;
1580}

1582std::pair<SourceLocation, StringRef> ASTReader::getModuleImportLoc(int ID) {
if (ID == 0)
  return std::make_pair(SourceLocation(), "");

if (unsigned(-ID) - 2 >= getTotalNumSLocs() || ID > 0) {
  Error("source location entry ID out-of-range for AST file");
  return std::make_pair(SourceLocation(), "");
}

// Find which module file this entry lands in.
ModuleFile *M = GlobalSLocEntryMap.find(-ID)->second;
if (!M->isModule())
  return std::make_pair(SourceLocation(), "");

// FIXME: Can we map this down to a particular submodule? That would be
// ideal.
return std::make_pair(M->ImportLoc, StringRef(M->ModuleName));
1599}

1601/// Find the location where the module F is imported.
1602SourceLocation ASTReader::getImportLocation(ModuleFile *F) {
if (F->ImportLoc.isValid())
  return F->ImportLoc;

// Otherwise we have a PCH. It's considered to be "imported" at the first
// location of its includer.
if (F->ImportedBy.empty() || !F->ImportedBy[0]) {
  // Main file is the importer.
  assert(SourceMgr.getMainFileID().isValid() && "missing main file")((SourceMgr.getMainFileID().isValid() && "missing main file"
) ? static_cast<void> (0) : __assert_fail ("SourceMgr.getMainFileID().isValid() && \"missing main file\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 1610, __PRETTY_FUNCTION__));
  return SourceMgr.getLocForStartOfFile(SourceMgr.getMainFileID());
}
return F->ImportedBy[0]->FirstLoc;
1614}

1616/// Enter a subblock of the specified BlockID with the specified cursor. Read
1617/// the abbreviations that are at the top of the block and then leave the cursor
1618/// pointing into the block.
1619bool ASTReader::ReadBlockAbbrevs(BitstreamCursor &Cursor, unsigned BlockID) {
if (llvm::Error Err = Cursor.EnterSubBlock(BlockID)) {
  // FIXME this drops errors on the floor.
  consumeError(std::move(Err));
  return true;
}

while (true) {
  uint64_t Offset = Cursor.GetCurrentBitNo();
  Expected<unsigned> MaybeCode = Cursor.ReadCode();
  if (!MaybeCode) {
    // FIXME this drops errors on the floor.
    consumeError(MaybeCode.takeError());
    return true;
  }
  unsigned Code = MaybeCode.get();

  // We expect all abbrevs to be at the start of the block.
  if (Code != llvm::bitc::DEFINE_ABBREV) {
    if (llvm::Error Err = Cursor.JumpToBit(Offset)) {
      // FIXME this drops errors on the floor.
      consumeError(std::move(Err));
      return true;
    }
    return false;
  }
  if (llvm::Error Err = Cursor.ReadAbbrevRecord()) {
    // FIXME this drops errors on the floor.
    consumeError(std::move(Err));
    return true;
  }
}
1651}

1653Token ASTReader::ReadToken(ModuleFile &F, const RecordDataImpl &Record,
                         unsigned &Idx) {
Token Tok;
Tok.startToken();
Tok.setLocation(ReadSourceLocation(F, Record, Idx));
Tok.setLength(Record[Idx++]);
if (IdentifierInfo *II = getLocalIdentifier(F, Record[Idx++]))
  Tok.setIdentifierInfo(II);
Tok.setKind((tok::TokenKind)Record[Idx++]);
Tok.setFlag((Token::TokenFlags)Record[Idx++]);
return Tok;
1664}

1666MacroInfo *ASTReader::ReadMacroRecord(ModuleFile &F, uint64_t Offset) {
BitstreamCursor &Stream = F.MacroCursor;

// Keep track of where we are in the stream, then jump back there
// after reading this macro.
SavedStreamPosition SavedPosition(Stream);

if (llvm::Error Err = Stream.JumpToBit(Offset)) {
  // FIXME this drops errors on the floor.
  consumeError(std::move(Err));
  return nullptr;
}
RecordData Record;
SmallVector<IdentifierInfo*, 16> MacroParams;
MacroInfo *Macro = nullptr;

while (true) {
  // Advance to the next record, but if we get to the end of the block, don't
  // pop it (removing all the abbreviations from the cursor) since we want to
  // be able to reseek within the block and read entries.
  unsigned Flags = BitstreamCursor::AF_DontPopBlockAtEnd;
  Expected<llvm::BitstreamEntry> MaybeEntry =
      Stream.advanceSkippingSubblocks(Flags);
  if (!MaybeEntry) {
    Error(MaybeEntry.takeError());
    return Macro;
  }
  llvm::BitstreamEntry Entry = MaybeEntry.get();

  switch (Entry.Kind) {
  case llvm::BitstreamEntry::SubBlock: // Handled for us already.
  case llvm::BitstreamEntry::Error:
    Error("malformed block record in AST file");
    return Macro;
  case llvm::BitstreamEntry::EndBlock:
    return Macro;
  case llvm::BitstreamEntry::Record:
    // The interesting case.
    break;
  }

  // Read a record.
  Record.clear();
  PreprocessorRecordTypes RecType;
  if (Expected<unsigned> MaybeRecType = Stream.readRecord(Entry.ID, Record))
    RecType = (PreprocessorRecordTypes)MaybeRecType.get();
  else {
    Error(MaybeRecType.takeError());
    return Macro;
  }
  switch (RecType) {
  case PP_MODULE_MACRO:
  case PP_MACRO_DIRECTIVE_HISTORY:
    return Macro;

  case PP_MACRO_OBJECT_LIKE:
  case PP_MACRO_FUNCTION_LIKE: {
    // If we already have a macro, that means that we've hit the end
    // of the definition of the macro we were looking for. We're
    // done.
    if (Macro)
      return Macro;

    unsigned NextIndex = 1; // Skip identifier ID.
    SourceLocation Loc = ReadSourceLocation(F, Record, NextIndex);
    MacroInfo *MI = PP.AllocateMacroInfo(Loc);
    MI->setDefinitionEndLoc(ReadSourceLocation(F, Record, NextIndex));
    MI->setIsUsed(Record[NextIndex++]);
    MI->setUsedForHeaderGuard(Record[NextIndex++]);

    if (RecType == PP_MACRO_FUNCTION_LIKE) {
      // Decode function-like macro info.
      bool isC99VarArgs = Record[NextIndex++];
      bool isGNUVarArgs = Record[NextIndex++];
      bool hasCommaPasting = Record[NextIndex++];
      MacroParams.clear();
      unsigned NumArgs = Record[NextIndex++];
      for (unsigned i = 0; i != NumArgs; ++i)
        MacroParams.push_back(getLocalIdentifier(F, Record[NextIndex++]));

      // Install function-like macro info.
      MI->setIsFunctionLike();
      if (isC99VarArgs) MI->setIsC99Varargs();
      if (isGNUVarArgs) MI->setIsGNUVarargs();
      if (hasCommaPasting) MI->setHasCommaPasting();
      MI->setParameterList(MacroParams, PP.getPreprocessorAllocator());
    }

    // Remember that we saw this macro last so that we add the tokens that
    // form its body to it.
    Macro = MI;

    if (NextIndex + 1 == Record.size() && PP.getPreprocessingRecord() &&
        Record[NextIndex]) {
      // We have a macro definition. Register the association
      PreprocessedEntityID
          GlobalID = getGlobalPreprocessedEntityID(F, Record[NextIndex]);
      PreprocessingRecord &PPRec = *PP.getPreprocessingRecord();
      PreprocessingRecord::PPEntityID PPID =
          PPRec.getPPEntityID(GlobalID - 1, /*isLoaded=*/true);
      MacroDefinitionRecord *PPDef = cast_or_null<MacroDefinitionRecord>(
          PPRec.getPreprocessedEntity(PPID));
      if (PPDef)
        PPRec.RegisterMacroDefinition(Macro, PPDef);
    }

    ++NumMacrosRead;
    break;
  }

  case PP_TOKEN: {
    // If we see a TOKEN before a PP_MACRO_*, then the file is
    // erroneous, just pretend we didn't see this.
    if (!Macro) break;

    unsigned Idx = 0;
    Token Tok = ReadToken(F, Record, Idx);
    Macro->AddTokenToBody(Tok);
    break;
  }
  }
}
1788}

1790PreprocessedEntityID
1791ASTReader::getGlobalPreprocessedEntityID(ModuleFile &M,
                                       unsigned LocalID) const {
if (!M.ModuleOffsetMap.empty())
  ReadModuleOffsetMap(M);

ContinuousRangeMap<uint32_t, int, 2>::const_iterator
  I = M.PreprocessedEntityRemap.find(LocalID - NUM_PREDEF_PP_ENTITY_IDS);
assert(I != M.PreprocessedEntityRemap.end()((I != M.PreprocessedEntityRemap.end() && "Invalid index into preprocessed entity index remap"
) ? static_cast<void> (0) : __assert_fail ("I != M.PreprocessedEntityRemap.end() && \"Invalid index into preprocessed entity index remap\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 1799, __PRETTY_FUNCTION__))
       && "Invalid index into preprocessed entity index remap")((I != M.PreprocessedEntityRemap.end() && "Invalid index into preprocessed entity index remap"
) ? static_cast<void> (0) : __assert_fail ("I != M.PreprocessedEntityRemap.end() && \"Invalid index into preprocessed entity index remap\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 1799, __PRETTY_FUNCTION__));

return LocalID + I->second;
1802}

1804unsigned HeaderFileInfoTrait::ComputeHash(internal_key_ref ikey) {
return llvm::hash_combine(ikey.Size, ikey.ModTime);
1806}

1808HeaderFileInfoTrait::internal_key_type
1809HeaderFileInfoTrait::GetInternalKey(const FileEntry *FE) {
internal_key_type ikey = {FE->getSize(),
                          M.HasTimestamps ? FE->getModificationTime() : 0,
                          FE->getName(), /*Imported*/ false};
return ikey;
1814}

1816bool HeaderFileInfoTrait::EqualKey(internal_key_ref a, internal_key_ref b) {
if (a.Size != b.Size || (a.ModTime && b.ModTime && a.ModTime != b.ModTime))
  return false;

if (llvm::sys::path::is_absolute(a.Filename) && a.Filename == b.Filename)
  return true;

// Determine whether the actual files are equivalent.
FileManager &FileMgr = Reader.getFileManager();
auto GetFile = [&](const internal_key_type &Key) -> const FileEntry* {
  if (!Key.Imported) {
    if (auto File = FileMgr.getFile(Key.Filename))
      return *File;
    return nullptr;
  }

  std::string Resolved = Key.Filename;
  Reader.ResolveImportedPath(M, Resolved);
  if (auto File = FileMgr.getFile(Resolved))
    return *File;
  return nullptr;
};

const FileEntry *FEA = GetFile(a);
const FileEntry *FEB = GetFile(b);
return FEA && FEA == FEB;
1842}

1844std::pair<unsigned, unsigned>
1845HeaderFileInfoTrait::ReadKeyDataLength(const unsigned char*& d) {
using namespace llvm::support;

unsigned KeyLen = (unsigned) endian::readNext<uint16_t, little, unaligned>(d);
unsigned DataLen = (unsigned) *d++;
return std::make_pair(KeyLen, DataLen);
1851}

1853HeaderFileInfoTrait::internal_key_type
1854HeaderFileInfoTrait::ReadKey(const unsigned char *d, unsigned) {
using namespace llvm::support;

internal_key_type ikey;
ikey.Size = off_t(endian::readNext<uint64_t, little, unaligned>(d));
ikey.ModTime = time_t(endian::readNext<uint64_t, little, unaligned>(d));
ikey.Filename = (const char *)d;
ikey.Imported = true;
return ikey;
1863}

1865HeaderFileInfoTrait::data_type
1866HeaderFileInfoTrait::ReadData(internal_key_ref key, const unsigned char *d,
                            unsigned DataLen) {
using namespace llvm::support;

const unsigned char *End = d + DataLen;
HeaderFileInfo HFI;
unsigned Flags = *d++;
// FIXME: Refactor with mergeHeaderFileInfo in HeaderSearch.cpp.
HFI.isImport |= (Flags >> 5) & 0x01;
HFI.isPragmaOnce |= (Flags >> 4) & 0x01;
HFI.DirInfo = (Flags >> 1) & 0x07;
HFI.IndexHeaderMapHeader = Flags & 0x01;
// FIXME: Find a better way to handle this. Maybe just store a
// "has been included" flag?
HFI.NumIncludes = std::max(endian::readNext<uint16_t, little, unaligned>(d),
                           HFI.NumIncludes);
HFI.ControllingMacroID = Reader.getGlobalIdentifierID(
    M, endian::readNext<uint32_t, little, unaligned>(d));
if (unsigned FrameworkOffset =
        endian::readNext<uint32_t, little, unaligned>(d)) {
  // The framework offset is 1 greater than the actual offset,
  // since 0 is used as an indicator for "no framework name".
  StringRef FrameworkName(FrameworkStrings + FrameworkOffset - 1);
  HFI.Framework = HS->getUniqueFrameworkName(FrameworkName);
}

assert((End - d) % 4 == 0 &&(((End - d) % 4 == 0 && "Wrong data length in HeaderFileInfo deserialization"
) ? static_cast<void> (0) : __assert_fail ("(End - d) % 4 == 0 && \"Wrong data length in HeaderFileInfo deserialization\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 1893, __PRETTY_FUNCTION__))
       "Wrong data length in HeaderFileInfo deserialization")(((End - d) % 4 == 0 && "Wrong data length in HeaderFileInfo deserialization"
) ? static_cast<void> (0) : __assert_fail ("(End - d) % 4 == 0 && \"Wrong data length in HeaderFileInfo deserialization\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 1893, __PRETTY_FUNCTION__));
while (d != End) {
  uint32_t LocalSMID = endian::readNext<uint32_t, little, unaligned>(d);
  auto HeaderRole = static_cast<ModuleMap::ModuleHeaderRole>(LocalSMID & 3);
  LocalSMID >>= 2;

  // This header is part of a module. Associate it with the module to enable
  // implicit module import.
  SubmoduleID GlobalSMID = Reader.getGlobalSubmoduleID(M, LocalSMID);
  Module *Mod = Reader.getSubmodule(GlobalSMID);
  FileManager &FileMgr = Reader.getFileManager();
  ModuleMap &ModMap =
      Reader.getPreprocessor().getHeaderSearchInfo().getModuleMap();

  std::string Filename = key.Filename;
  if (key.Imported)
    Reader.ResolveImportedPath(M, Filename);
  // FIXME: This is not always the right filename-as-written, but we're not
  // going to use this information to rebuild the module, so it doesn't make
  // a lot of difference.
  Module::Header H = { key.Filename, *FileMgr.getFile(Filename) };
  ModMap.addHeader(Mod, H, HeaderRole, /*Imported*/true);
  HFI.isModuleHeader |= !(HeaderRole & ModuleMap::TextualHeader);
}

// This HeaderFileInfo was externally loaded.
HFI.External = true;
HFI.IsValid = true;
return HFI;
1922}

1924void ASTReader::addPendingMacro(IdentifierInfo *II,
                              ModuleFile *M,
                              uint64_t MacroDirectivesOffset) {
assert(NumCurrentElementsDeserializing > 0 &&"Missing deserialization guard")((NumCurrentElementsDeserializing > 0 &&"Missing deserialization guard"
) ? static_cast<void> (0) : __assert_fail ("NumCurrentElementsDeserializing > 0 &&\"Missing deserialization guard\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 1927, __PRETTY_FUNCTION__));
PendingMacroIDs[II].push_back(PendingMacroInfo(M, MacroDirectivesOffset));
1929}

1931void ASTReader::ReadDefinedMacros() {
// Note that we are loading defined macros.
Deserializing Macros(this);

for (ModuleFile &I : llvm::reverse(ModuleMgr)) {
  BitstreamCursor &MacroCursor = I.MacroCursor;

  // If there was no preprocessor block, skip this file.
  if (MacroCursor.getBitcodeBytes().empty())
    continue;

  BitstreamCursor Cursor = MacroCursor;
  if (llvm::Error Err = Cursor.JumpToBit(I.MacroStartOffset)) {
    Error(std::move(Err));
    return;
  }

  RecordData Record;
  while (true) {
    Expected<llvm::BitstreamEntry> MaybeE = Cursor.advanceSkippingSubblocks();
    if (!MaybeE) {
      Error(MaybeE.takeError());
      return;
    }
    llvm::BitstreamEntry E = MaybeE.get();

    switch (E.Kind) {
    case llvm::BitstreamEntry::SubBlock: // Handled for us already.
    case llvm::BitstreamEntry::Error:
      Error("malformed block record in AST file");
      return;
    case llvm::BitstreamEntry::EndBlock:
      goto NextCursor;

    case llvm::BitstreamEntry::Record: {
      Record.clear();
      Expected<unsigned> MaybeRecord = Cursor.readRecord(E.ID, Record);
      if (!MaybeRecord) {
        Error(MaybeRecord.takeError());
        return;
      }
      switch (MaybeRecord.get()) {
      default:  // Default behavior: ignore.
        break;

      case PP_MACRO_OBJECT_LIKE:
      case PP_MACRO_FUNCTION_LIKE: {
        IdentifierInfo *II = getLocalIdentifier(I, Record[0]);
        if (II->isOutOfDate())
          updateOutOfDateIdentifier(*II);
        break;
      }

      case PP_TOKEN:
        // Ignore tokens.
        break;
      }
      break;
    }
    }
  }
  NextCursor:  ;
}
1994}

1996namespace {

/// Visitor class used to look up identifirs in an AST file.
class IdentifierLookupVisitor {
  StringRef Name;
  unsigned NameHash;
  unsigned PriorGeneration;
  unsigned &NumIdentifierLookups;
  unsigned &NumIdentifierLookupHits;
  IdentifierInfo *Found = nullptr;

public:
  IdentifierLookupVisitor(StringRef Name, unsigned PriorGeneration,
                          unsigned &NumIdentifierLookups,
                          unsigned &NumIdentifierLookupHits)
    : Name(Name), NameHash(ASTIdentifierLookupTrait::ComputeHash(Name)),
      PriorGeneration(PriorGeneration),
      NumIdentifierLookups(NumIdentifierLookups),
      NumIdentifierLookupHits(NumIdentifierLookupHits) {}

  bool operator()(ModuleFile &M) {
    // If we've already searched this module file, skip it now.
    if (M.Generation <= PriorGeneration)
      return true;

    ASTIdentifierLookupTable *IdTable
      = (ASTIdentifierLookupTable *)M.IdentifierLookupTable;
    if (!IdTable)
      return false;

    ASTIdentifierLookupTrait Trait(IdTable->getInfoObj().getReader(), M,
                                   Found);
    ++NumIdentifierLookups;
    ASTIdentifierLookupTable::iterator Pos =
        IdTable->find_hashed(Name, NameHash, &Trait);
    if (Pos == IdTable->end())
      return false;

    // Dereferencing the iterator has the effect of building the
    // IdentifierInfo node and populating it with the various
    // declarations it needs.
    ++NumIdentifierLookupHits;
    Found = *Pos;
    return true;
  }

  // Retrieve the identifier info found within the module
  // files.
  IdentifierInfo *getIdentifierInfo() const { return Found; }
};

2047} // namespace

2049void ASTReader::updateOutOfDateIdentifier(IdentifierInfo &II) {
// Note that we are loading an identifier.
Deserializing AnIdentifier(this);

unsigned PriorGeneration = 0;
if (getContext().getLangOpts().Modules)
  PriorGeneration = IdentifierGeneration[&II];

// If there is a global index, look there first to determine which modules
// provably do not have any results for this identifier.
GlobalModuleIndex::HitSet Hits;
GlobalModuleIndex::HitSet *HitsPtr = nullptr;
if (!loadGlobalIndex()) {
  if (GlobalIndex->lookupIdentifier(II.getName(), Hits)) {
    HitsPtr = &Hits;
  }
}

IdentifierLookupVisitor Visitor(II.getName(), PriorGeneration,
                                NumIdentifierLookups,
                                NumIdentifierLookupHits);
ModuleMgr.visit(Visitor, HitsPtr);
markIdentifierUpToDate(&II);
2072}

2074void ASTReader::markIdentifierUpToDate(IdentifierInfo *II) {
if (!II)
  return;

II->setOutOfDate(false);

// Update the generation for this identifier.
if (getContext().getLangOpts().Modules)
  IdentifierGeneration[II] = getGeneration();
2083}

2085void ASTReader::resolvePendingMacro(IdentifierInfo *II,
                                  const PendingMacroInfo &PMInfo) {
ModuleFile &M = *PMInfo.M;

BitstreamCursor &Cursor = M.MacroCursor;
SavedStreamPosition SavedPosition(Cursor);
if (llvm::Error Err = Cursor.JumpToBit(PMInfo.MacroDirectivesOffset)) {
  Error(std::move(Err));
  return;
}

struct ModuleMacroRecord {
  SubmoduleID SubModID;
  MacroInfo *MI;
  SmallVector<SubmoduleID, 8> Overrides;
};
llvm::SmallVector<ModuleMacroRecord, 8> ModuleMacros;

// We expect to see a sequence of PP_MODULE_MACRO records listing exported
// macros, followed by a PP_MACRO_DIRECTIVE_HISTORY record with the complete
// macro histroy.
RecordData Record;
while (true) {
  Expected<llvm::BitstreamEntry> MaybeEntry =
      Cursor.advance(BitstreamCursor::AF_DontPopBlockAtEnd);
  if (!MaybeEntry) {
    Error(MaybeEntry.takeError());
    return;
  }
  llvm::BitstreamEntry Entry = MaybeEntry.get();

  if (Entry.Kind != llvm::BitstreamEntry::Record) {
    Error("malformed block record in AST file");
    return;
  }

  Record.clear();
  Expected<unsigned> MaybePP = Cursor.readRecord(Entry.ID, Record);
  if (!MaybePP) {
    Error(MaybePP.takeError());
    return;
  }
  switch ((PreprocessorRecordTypes)MaybePP.get()) {
  case PP_MACRO_DIRECTIVE_HISTORY:
    break;

  case PP_MODULE_MACRO: {
    ModuleMacros.push_back(ModuleMacroRecord());
    auto &Info = ModuleMacros.back();
    Info.SubModID = getGlobalSubmoduleID(M, Record[0]);
    Info.MI = getMacro(getGlobalMacroID(M, Record[1]));
    for (int I = 2, N = Record.size(); I != N; ++I)
      Info.Overrides.push_back(getGlobalSubmoduleID(M, Record[I]));
    continue;
  }

  default:
    Error("malformed block record in AST file");
    return;
  }

  // We found the macro directive history; that's the last record
  // for this macro.
  break;
}

// Module macros are listed in reverse dependency order.
{
  std::reverse(ModuleMacros.begin(), ModuleMacros.end());
  llvm::SmallVector<ModuleMacro*, 8> Overrides;
  for (auto &MMR : ModuleMacros) {
    Overrides.clear();
    for (unsigned ModID : MMR.Overrides) {
      Module *Mod = getSubmodule(ModID);
      auto *Macro = PP.getModuleMacro(Mod, II);
      assert(Macro && "missing definition for overridden macro")((Macro && "missing definition for overridden macro")
 ? static_cast<void> (0) : __assert_fail ("Macro && \"missing definition for overridden macro\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 2160, __PRETTY_FUNCTION__));
      Overrides.push_back(Macro);
    }

    bool Inserted = false;
    Module *Owner = getSubmodule(MMR.SubModID);
    PP.addModuleMacro(Owner, II, MMR.MI, Overrides, Inserted);
  }
}

// Don't read the directive history for a module; we don't have anywhere
// to put it.
if (M.isModule())
  return;

// Deserialize the macro directives history in reverse source-order.
MacroDirective *Latest = nullptr, *Earliest = nullptr;
unsigned Idx = 0, N = Record.size();
while (Idx < N) {
  MacroDirective *MD = nullptr;
  SourceLocation Loc = ReadSourceLocation(M, Record, Idx);
  MacroDirective::Kind K = (MacroDirective::Kind)Record[Idx++];
  switch (K) {
  case MacroDirective::MD_Define: {
    MacroInfo *MI = getMacro(getGlobalMacroID(M, Record[Idx++]));
    MD = PP.AllocateDefMacroDirective(MI, Loc);
    break;
  }
  case MacroDirective::MD_Undefine:
    MD = PP.AllocateUndefMacroDirective(Loc);
    break;
  case MacroDirective::MD_Visibility:
    bool isPublic = Record[Idx++];
    MD = PP.AllocateVisibilityMacroDirective(Loc, isPublic);
    break;
  }

  if (!Latest)
    Latest = MD;
  if (Earliest)
    Earliest->setPrevious(MD);
  Earliest = MD;
}

if (Latest)
  PP.setLoadedMacroDirective(II, Earliest, Latest);
2206}

2208ASTReader::InputFileInfo
2209ASTReader::readInputFileInfo(ModuleFile &F, unsigned ID) {
// Go find this input file.
BitstreamCursor &Cursor = F.InputFilesCursor;
SavedStreamPosition SavedPosition(Cursor);
if (llvm::Error Err = Cursor.JumpToBit(F.InputFileOffsets[ID - 1])) {
  // FIXME this drops errors on the floor.
  consumeError(std::move(Err));
}

Expected<unsigned> MaybeCode = Cursor.ReadCode();
if (!MaybeCode) {
  // FIXME this drops errors on the floor.
  consumeError(MaybeCode.takeError());
}
unsigned Code = MaybeCode.get();
RecordData Record;
StringRef Blob;

if (Expected<unsigned> Maybe = Cursor.readRecord(Code, Record, &Blob))
  assert(static_cast<InputFileRecordTypes>(Maybe.get()) == INPUT_FILE &&((static_cast<InputFileRecordTypes>(Maybe.get()) == INPUT_FILE
 && "invalid record type for input file") ? static_cast
<void> (0) : __assert_fail ("static_cast<InputFileRecordTypes>(Maybe.get()) == INPUT_FILE && \"invalid record type for input file\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 2229, __PRETTY_FUNCTION__))
         "invalid record type for input file")((static_cast<InputFileRecordTypes>(Maybe.get()) == INPUT_FILE
 && "invalid record type for input file") ? static_cast
<void> (0) : __assert_fail ("static_cast<InputFileRecordTypes>(Maybe.get()) == INPUT_FILE && \"invalid record type for input file\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 2229, __PRETTY_FUNCTION__));
else {
  // FIXME this drops errors on the floor.
  consumeError(Maybe.takeError());
}

assert(Record[0] == ID && "Bogus stored ID or offset")((Record[0] == ID && "Bogus stored ID or offset") ? static_cast
<void> (0) : __assert_fail ("Record[0] == ID && \"Bogus stored ID or offset\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 2235, __PRETTY_FUNCTION__));
InputFileInfo R;
R.StoredSize = static_cast<off_t>(Record[1]);
R.StoredTime = static_cast<time_t>(Record[2]);
R.Overridden = static_cast<bool>(Record[3]);
R.Transient = static_cast<bool>(Record[4]);
R.TopLevelModuleMap = static_cast<bool>(Record[5]);
R.Filename = Blob;
ResolveImportedPath(F, R.Filename);
return R;
2245}

2247static unsigned moduleKindForDiagnostic(ModuleKind Kind);
2248InputFile ASTReader::getInputFile(ModuleFile &F, unsigned ID, bool Complain) {
// If this ID is bogus, just return an empty input file.
if (ID == 0 || ID > F.InputFilesLoaded.size())
  return InputFile();

// If we've already loaded this input file, return it.
if (F.InputFilesLoaded[ID-1].getFile())
  return F.InputFilesLoaded[ID-1];

if (F.InputFilesLoaded[ID-1].isNotFound())
  return InputFile();

// Go find this input file.
BitstreamCursor &Cursor = F.InputFilesCursor;
SavedStreamPosition SavedPosition(Cursor);
if (llvm::Error Err = Cursor.JumpToBit(F.InputFileOffsets[ID - 1])) {
  // FIXME this drops errors on the floor.
  consumeError(std::move(Err));
}

InputFileInfo FI = readInputFileInfo(F, ID);
off_t StoredSize = FI.StoredSize;
time_t StoredTime = FI.StoredTime;
bool Overridden = FI.Overridden;
bool Transient = FI.Transient;
StringRef Filename = FI.Filename;

const FileEntry *File = nullptr;
if (auto FE = FileMgr.getFile(Filename, /*OpenFile=*/false))
  File = *FE;

// If we didn't find the file, resolve it relative to the
// original directory from which this AST file was created.
if (File == nullptr && !F.OriginalDir.empty() && !F.BaseDirectory.empty() &&
    F.OriginalDir != F.BaseDirectory) {
  std::string Resolved = resolveFileRelativeToOriginalDir(
      Filename, F.OriginalDir, F.BaseDirectory);
  if (!Resolved.empty())
    if (auto FE = FileMgr.getFile(Resolved))
      File = *FE;
}

// For an overridden file, create a virtual file with the stored
// size/timestamp.
if ((Overridden || Transient) && File == nullptr)
  File = FileMgr.getVirtualFile(Filename, StoredSize, StoredTime);

if (File == nullptr) {
  if (Complain) {
    std::string ErrorStr = "could not find file '";
    ErrorStr += Filename;
    ErrorStr += "' referenced by AST file '";
    ErrorStr += F.FileName;
    ErrorStr += "'";
    Error(ErrorStr);
  }
  // Record that we didn't find the file.
  F.InputFilesLoaded[ID-1] = InputFile::getNotFound();
  return InputFile();
}

// Check if there was a request to override the contents of the file
// that was part of the precompiled header. Overriding such a file
// can lead to problems when lexing using the source locations from the
// PCH.
SourceManager &SM = getSourceManager();
// FIXME: Reject if the overrides are different.
if ((!Overridden && !Transient) && SM.isFileOverridden(File)) {
  if (Complain)
    Error(diag::err_fe_pch_file_overridden, Filename);

  // After emitting the diagnostic, bypass the overriding file to recover
  // (this creates a separate FileEntry).
  File = SM.bypassFileContentsOverride(*File);
  if (!File) {
    F.InputFilesLoaded[ID - 1] = InputFile::getNotFound();
    return InputFile();
  }
}

bool IsOutOfDate = false;

// For an overridden file, there is nothing to validate.
if (!Overridden && //
    (StoredSize != File->getSize() ||
     (StoredTime && StoredTime != File->getModificationTime() &&
      !DisableValidation)
     )) {
  if (Complain) {
    // Build a list of the PCH imports that got us here (in reverse).
    SmallVector<ModuleFile *, 4> ImportStack(1, &F);
    while (!ImportStack.back()->ImportedBy.empty())
      ImportStack.push_back(ImportStack.back()->ImportedBy[0]);

    // The top-level PCH is stale.
    StringRef TopLevelPCHName(ImportStack.back()->FileName);
    unsigned DiagnosticKind = moduleKindForDiagnostic(ImportStack.back()->Kind);
    if (DiagnosticKind == 0)
      Error(diag::err_fe_pch_file_modified, Filename, TopLevelPCHName);
    else if (DiagnosticKind == 1)
      Error(diag::err_fe_module_file_modified, Filename, TopLevelPCHName);
    else
      Error(diag::err_fe_ast_file_modified, Filename, TopLevelPCHName);

    // Print the import stack.
    if (ImportStack.size() > 1 && !Diags.isDiagnosticInFlight()) {
      Diag(diag::note_pch_required_by)
        << Filename << ImportStack[0]->FileName;
      for (unsigned I = 1; I < ImportStack.size(); ++I)
        Diag(diag::note_pch_required_by)
          << ImportStack[I-1]->FileName << ImportStack[I]->FileName;
    }

    if (!Diags.isDiagnosticInFlight())
      Diag(diag::note_pch_rebuild_required) << TopLevelPCHName;
  }

  IsOutOfDate = true;
}
// FIXME: If the file is overridden and we've already opened it,
// issue an error (or split it into a separate FileEntry).

InputFile IF = InputFile(File, Overridden || Transient, IsOutOfDate);

// Note that we've loaded this input file.
F.InputFilesLoaded[ID-1] = IF;
return IF;
2375}

2377/// If we are loading a relocatable PCH or module file, and the filename
2378/// is not an absolute path, add the system or module root to the beginning of
2379/// the file name.
2380void ASTReader::ResolveImportedPath(ModuleFile &M, std::string &Filename) {
// Resolve relative to the base directory, if we have one.
if (!M.BaseDirectory.empty())
  return ResolveImportedPath(Filename, M.BaseDirectory);
2384}

2386void ASTReader::ResolveImportedPath(std::string &Filename, StringRef Prefix) {
if (Filename.empty() || llvm::sys::path::is_absolute(Filename))
  return;

SmallString<128> Buffer;
llvm::sys::path::append(Buffer, Prefix, Filename);
Filename.assign(Buffer.begin(), Buffer.end());
2393}

2395static bool isDiagnosedResult(ASTReader::ASTReadResult ARR, unsigned Caps) {
switch (ARR) {
case ASTReader::Failure: return true;
case ASTReader::Missing: return !(Caps & ASTReader::ARR_Missing);
case ASTReader::OutOfDate: return !(Caps & ASTReader::ARR_OutOfDate);
case ASTReader::VersionMismatch: return !(Caps & ASTReader::ARR_VersionMismatch);
case ASTReader::ConfigurationMismatch:
  return !(Caps & ASTReader::ARR_ConfigurationMismatch);
case ASTReader::HadErrors: return true;
case ASTReader::Success: return false;
}

llvm_unreachable("unknown ASTReadResult")::llvm::llvm_unreachable_internal("unknown ASTReadResult", "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 2407);
2408}

2410ASTReader::ASTReadResult ASTReader::ReadOptionsBlock(
  BitstreamCursor &Stream, unsigned ClientLoadCapabilities,
  bool AllowCompatibleConfigurationMismatch, ASTReaderListener &Listener,
  std::string &SuggestedPredefines) {
if (llvm::Error Err = Stream.EnterSubBlock(OPTIONS_BLOCK_ID)) {
  // FIXME this drops errors on the floor.
  consumeError(std::move(Err));
  return Failure;
}

// Read all of the records in the options block.
RecordData Record;
ASTReadResult Result = Success;
while (true) {
  Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
  if (!MaybeEntry) {
    // FIXME this drops errors on the floor.
    consumeError(MaybeEntry.takeError());
    return Failure;
  }
  llvm::BitstreamEntry Entry = MaybeEntry.get();

  switch (Entry.Kind) {
  case llvm::BitstreamEntry::Error:
  case llvm::BitstreamEntry::SubBlock:
    return Failure;

  case llvm::BitstreamEntry::EndBlock:
    return Result;

  case llvm::BitstreamEntry::Record:
    // The interesting case.
    break;
  }

  // Read and process a record.
  Record.clear();
  Expected<unsigned> MaybeRecordType = Stream.readRecord(Entry.ID, Record);
  if (!MaybeRecordType) {
    // FIXME this drops errors on the floor.
    consumeError(MaybeRecordType.takeError());
    return Failure;
  }
  switch ((OptionsRecordTypes)MaybeRecordType.get()) {
  case LANGUAGE_OPTIONS: {
    bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
    if (ParseLanguageOptions(Record, Complain, Listener,
                             AllowCompatibleConfigurationMismatch))
      Result = ConfigurationMismatch;
    break;
  }

  case TARGET_OPTIONS: {
    bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
    if (ParseTargetOptions(Record, Complain, Listener,
                           AllowCompatibleConfigurationMismatch))
      Result = ConfigurationMismatch;
    break;
  }

  case FILE_SYSTEM_OPTIONS: {
    bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
    if (!AllowCompatibleConfigurationMismatch &&
        ParseFileSystemOptions(Record, Complain, Listener))
      Result = ConfigurationMismatch;
    break;
  }

  case HEADER_SEARCH_OPTIONS: {
    bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
    if (!AllowCompatibleConfigurationMismatch &&
        ParseHeaderSearchOptions(Record, Complain, Listener))
      Result = ConfigurationMismatch;
    break;
  }

  case PREPROCESSOR_OPTIONS:
    bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
    if (!AllowCompatibleConfigurationMismatch &&
        ParsePreprocessorOptions(Record, Complain, Listener,
                                 SuggestedPredefines))
      Result = ConfigurationMismatch;
    break;
  }
}
2495}

2497ASTReader::ASTReadResult
2498ASTReader::ReadControlBlock(ModuleFile &F,
                          SmallVectorImpl<ImportedModule> &Loaded,
                          const ModuleFile *ImportedBy,
                          unsigned ClientLoadCapabilities) {
BitstreamCursor &Stream = F.Stream;
ASTReadResult Result = Success;

if (llvm::Error Err = Stream.EnterSubBlock(CONTROL_BLOCK_ID)) {
  Error(std::move(Err));
  return Failure;
}

// Lambda to read the unhashed control block the first time it's called.
//
// For PCM files, the unhashed control block cannot be read until after the
// MODULE_NAME record.  However, PCH files have no MODULE_NAME, and yet still
// need to look ahead before reading the IMPORTS record.  For consistency,
// this block is always read somehow (see BitstreamEntry::EndBlock).
bool HasReadUnhashedControlBlock = false;
auto readUnhashedControlBlockOnce = [&]() {
  if (!HasReadUnhashedControlBlock) {
    HasReadUnhashedControlBlock = true;
    if (ASTReadResult Result =
            readUnhashedControlBlock(F, ImportedBy, ClientLoadCapabilities))
      return Result;
  }
  return Success;
};

// Read all of the records and blocks in the control block.
RecordData Record;
unsigned NumInputs = 0;
unsigned NumUserInputs = 0;
StringRef BaseDirectoryAsWritten;
while (true) {
  Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
  if (!MaybeEntry) {
    Error(MaybeEntry.takeError());
    return Failure;
  }
  llvm::BitstreamEntry Entry = MaybeEntry.get();

  switch (Entry.Kind) {
  case llvm::BitstreamEntry::Error:
    Error("malformed block record in AST file");
    return Failure;
  case llvm::BitstreamEntry::EndBlock: {
    // Validate the module before returning.  This call catches an AST with
    // no module name and no imports.
    if (ASTReadResult Result = readUnhashedControlBlockOnce())
      return Result;

    // Validate input files.
    const HeaderSearchOptions &HSOpts =
        PP.getHeaderSearchInfo().getHeaderSearchOpts();

    // All user input files reside at the index range [0, NumUserInputs), and
    // system input files reside at [NumUserInputs, NumInputs). For explicitly
    // loaded module files, ignore missing inputs.
    if (!DisableValidation && F.Kind != MK_ExplicitModule &&
        F.Kind != MK_PrebuiltModule) {
      bool Complain = (ClientLoadCapabilities & ARR_OutOfDate) == 0;

      // If we are reading a module, we will create a verification timestamp,
      // so we verify all input files.  Otherwise, verify only user input
      // files.

      unsigned N = NumUserInputs;
      if (ValidateSystemInputs ||
          (HSOpts.ModulesValidateOncePerBuildSession &&
           F.InputFilesValidationTimestamp <= HSOpts.BuildSessionTimestamp &&
           F.Kind == MK_ImplicitModule))
        N = NumInputs;

      for (unsigned I = 0; I < N; ++I) {
        InputFile IF = getInputFile(F, I+1, Complain);
        if (!IF.getFile() || IF.isOutOfDate())
          return OutOfDate;
      }
    }

    if (Listener)
      Listener->visitModuleFile(F.FileName, F.Kind);

    if (Listener && Listener->needsInputFileVisitation()) {
      unsigned N = Listener->needsSystemInputFileVisitation() ? NumInputs
                                                              : NumUserInputs;
      for (unsigned I = 0; I < N; ++I) {
        bool IsSystem = I >= NumUserInputs;
        InputFileInfo FI = readInputFileInfo(F, I+1);
        Listener->visitInputFile(FI.Filename, IsSystem, FI.Overridden,
                                 F.Kind == MK_ExplicitModule ||
                                 F.Kind == MK_PrebuiltModule);
      }
    }

    return Result;
  }

  case llvm::BitstreamEntry::SubBlock:
    switch (Entry.ID) {
    case INPUT_FILES_BLOCK_ID:
      F.InputFilesCursor = Stream;
      if (llvm::Error Err = Stream.SkipBlock()) {
        Error(std::move(Err));
        return Failure;
      }
      if (ReadBlockAbbrevs(F.InputFilesCursor, INPUT_FILES_BLOCK_ID)) {
        Error("malformed block record in AST file");
        return Failure;
      }
      continue;

    case OPTIONS_BLOCK_ID:
      // If we're reading the first module for this group, check its options
      // are compatible with ours. For modules it imports, no further checking
      // is required, because we checked them when we built it.
      if (Listener && !ImportedBy) {
        // Should we allow the configuration of the module file to differ from
        // the configuration of the current translation unit in a compatible
        // way?
        //
        // FIXME: Allow this for files explicitly specified with -include-pch.
        bool AllowCompatibleConfigurationMismatch =
            F.Kind == MK_ExplicitModule || F.Kind == MK_PrebuiltModule;

        Result = ReadOptionsBlock(Stream, ClientLoadCapabilities,
                                  AllowCompatibleConfigurationMismatch,
                                  *Listener, SuggestedPredefines);
        if (Result == Failure) {
          Error("malformed block record in AST file");
          return Result;
        }

        if (DisableValidation ||
            (AllowConfigurationMismatch && Result == ConfigurationMismatch))
          Result = Success;

        // If we can't load the module, exit early since we likely
        // will rebuild the module anyway. The stream may be in the
        // middle of a block.
        if (Result != Success)
          return Result;
      } else if (llvm::Error Err = Stream.SkipBlock()) {
        Error(std::move(Err));
        return Failure;
      }
      continue;

    default:
      if (llvm::Error Err = Stream.SkipBlock()) {
        Error(std::move(Err));
        return Failure;
      }
      continue;
    }

  case llvm::BitstreamEntry::Record:
    // The interesting case.
    break;
  }

  // Read and process a record.
  Record.clear();
  StringRef Blob;
  Expected<unsigned> MaybeRecordType =
      Stream.readRecord(Entry.ID, Record, &Blob);
  if (!MaybeRecordType) {
    Error(MaybeRecordType.takeError());
    return Failure;
  }
  switch ((ControlRecordTypes)MaybeRecordType.get()) {
  case METADATA: {
    if (Record[0] != VERSION_MAJOR && !DisableValidation) {
      if ((ClientLoadCapabilities & ARR_VersionMismatch) == 0)
        Diag(Record[0] < VERSION_MAJOR? diag::err_pch_version_too_old
                                      : diag::err_pch_version_too_new);
      return VersionMismatch;
    }

    bool hasErrors = Record[7];
    if (hasErrors && !DisableValidation && !AllowASTWithCompilerErrors) {
      Diag(diag::err_pch_with_compiler_errors);
      return HadErrors;
    }
    if (hasErrors) {
      Diags.ErrorOccurred = true;
      Diags.UncompilableErrorOccurred = true;
      Diags.UnrecoverableErrorOccurred = true;
    }

    F.RelocatablePCH = Record[4];
    // Relative paths in a relocatable PCH are relative to our sysroot.
    if (F.RelocatablePCH)
      F.BaseDirectory = isysroot.empty() ? "/" : isysroot;

    F.HasTimestamps = Record[5];

    F.PCHHasObjectFile = Record[6];

    const std::string &CurBranch = getClangFullRepositoryVersion();
    StringRef ASTBranch = Blob;
    if (StringRef(CurBranch) != ASTBranch && !DisableValidation) {
      if ((ClientLoadCapabilities & ARR_VersionMismatch) == 0)
        Diag(diag::err_pch_different_branch) << ASTBranch << CurBranch;
      return VersionMismatch;
    }
    break;
  }

  case IMPORTS: {
    // Validate the AST before processing any imports (otherwise, untangling
    // them can be error-prone and expensive).  A module will have a name and
    // will already have been validated, but this catches the PCH case.
    if (ASTReadResult Result = readUnhashedControlBlockOnce())
      return Result;

    // Load each of the imported PCH files.
    unsigned Idx = 0, N = Record.size();
    while (Idx < N) {
      // Read information about the AST file.
      ModuleKind ImportedKind = (ModuleKind)Record[Idx++];
      // The import location will be the local one for now; we will adjust
      // all import locations of module imports after the global source
      // location info are setup, in ReadAST.
      SourceLocation ImportLoc =
          ReadUntranslatedSourceLocation(Record[Idx++]);
      off_t StoredSize = (off_t)Record[Idx++];
      time_t StoredModTime = (time_t)Record[Idx++];
      ASTFileSignature StoredSignature = {
          {{(uint32_t)Record[Idx++], (uint32_t)Record[Idx++],
            (uint32_t)Record[Idx++], (uint32_t)Record[Idx++],
            (uint32_t)Record[Idx++]}}};

      std::string ImportedName = ReadString(Record, Idx);
      std::string ImportedFile;

      // For prebuilt and explicit modules first consult the file map for
      // an override. Note that here we don't search prebuilt module
      // directories, only the explicit name to file mappings. Also, we will
      // still verify the size/signature making sure it is essentially the
      // same file but perhaps in a different location.
      if (ImportedKind == MK_PrebuiltModule || ImportedKind == MK_ExplicitModule)
        ImportedFile = PP.getHeaderSearchInfo().getPrebuiltModuleFileName(
          ImportedName, /*FileMapOnly*/ true);

      if (ImportedFile.empty())
        // Use BaseDirectoryAsWritten to ensure we use the same path in the
        // ModuleCache as when writing.
        ImportedFile = ReadPath(BaseDirectoryAsWritten, Record, Idx);
      else
        SkipPath(Record, Idx);

      // If our client can't cope with us being out of date, we can't cope with
      // our dependency being missing.
      unsigned Capabilities = ClientLoadCapabilities;
      if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
        Capabilities &= ~ARR_Missing;

      // Load the AST file.
      auto Result = ReadASTCore(ImportedFile, ImportedKind, ImportLoc, &F,
                                Loaded, StoredSize, StoredModTime,
                                StoredSignature, Capabilities);

      // If we diagnosed a problem, produce a backtrace.
      if (isDiagnosedResult(Result, Capabilities))
        Diag(diag::note_module_file_imported_by)
            << F.FileName << !F.ModuleName.empty() << F.ModuleName;

      switch (Result) {
      case Failure: return Failure;
        // If we have to ignore the dependency, we'll have to ignore this too.
      case Missing:
      case OutOfDate: return OutOfDate;
      case VersionMismatch: return VersionMismatch;
      case ConfigurationMismatch: return ConfigurationMismatch;
      case HadErrors: return HadErrors;
      case Success: break;
      }
    }
    break;
  }

  case ORIGINAL_FILE:
    F.OriginalSourceFileID = FileID::get(Record[0]);
    F.ActualOriginalSourceFileName = Blob;
    F.OriginalSourceFileName = F.ActualOriginalSourceFileName;
    ResolveImportedPath(F, F.OriginalSourceFileName);
    break;

  case ORIGINAL_FILE_ID:
    F.OriginalSourceFileID = FileID::get(Record[0]);
    break;

  case ORIGINAL_PCH_DIR:
    F.OriginalDir = Blob;
    break;

  case MODULE_NAME:
    F.ModuleName = Blob;
    Diag(diag::remark_module_import)
        << F.ModuleName << F.FileName << (ImportedBy ? true : false)
        << (ImportedBy ? StringRef(ImportedBy->ModuleName) : StringRef());
    if (Listener)
      Listener->ReadModuleName(F.ModuleName);

    // Validate the AST as soon as we have a name so we can exit early on
    // failure.
    if (ASTReadResult Result = readUnhashedControlBlockOnce())
      return Result;

    break;

  case MODULE_DIRECTORY: {
    // Save the BaseDirectory as written in the PCM for computing the module
    // filename for the ModuleCache.
    BaseDirectoryAsWritten = Blob;
    assert(!F.ModuleName.empty() &&((!F.ModuleName.empty() && "MODULE_DIRECTORY found before MODULE_NAME"
) ? static_cast<void> (0) : __assert_fail ("!F.ModuleName.empty() && \"MODULE_DIRECTORY found before MODULE_NAME\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 2816, __PRETTY_FUNCTION__))
           "MODULE_DIRECTORY found before MODULE_NAME")((!F.ModuleName.empty() && "MODULE_DIRECTORY found before MODULE_NAME"
) ? static_cast<void> (0) : __assert_fail ("!F.ModuleName.empty() && \"MODULE_DIRECTORY found before MODULE_NAME\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 2816, __PRETTY_FUNCTION__));
    // If we've already loaded a module map file covering this module, we may
    // have a better path for it (relative to the current build).
    Module *M = PP.getHeaderSearchInfo().lookupModule(
        F.ModuleName, /*AllowSearch*/ true,
        /*AllowExtraModuleMapSearch*/ true);
    if (M && M->Directory) {
      // If we're implicitly loading a module, the base directory can't
      // change between the build and use.
      // Don't emit module relocation error if we have -fno-validate-pch
      if (!PP.getPreprocessorOpts().DisablePCHValidation &&
          F.Kind != MK_ExplicitModule && F.Kind != MK_PrebuiltModule) {
        auto BuildDir = PP.getFileManager().getDirectory(Blob);
        if (!BuildDir || *BuildDir != M->Directory) {
          if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
            Diag(diag::err_imported_module_relocated)
                << F.ModuleName << Blob << M->Directory->getName();
          return OutOfDate;
        }
      }
      F.BaseDirectory = M->Directory->getName();
    } else {
      F.BaseDirectory = Blob;
    }
    break;
  }

  case MODULE_MAP_FILE:
    if (ASTReadResult Result =
            ReadModuleMapFileBlock(Record, F, ImportedBy, ClientLoadCapabilities))
      return Result;
    break;

  case INPUT_FILE_OFFSETS:
    NumInputs = Record[0];
    NumUserInputs = Record[1];
    F.InputFileOffsets =
        (const llvm::support::unaligned_uint64_t *)Blob.data();
    F.InputFilesLoaded.resize(NumInputs);
    F.NumUserInputFiles = NumUserInputs;
    break;
  }
}
2859}

2861ASTReader::ASTReadResult
2862ASTReader::ReadASTBlock(ModuleFile &F, unsigned ClientLoadCapabilities) {
BitstreamCursor &Stream = F.Stream;

if (llvm::Error Err = Stream.EnterSubBlock(AST_BLOCK_ID)) {
  Error(std::move(Err));
  return Failure;
}

// Read all of the records and blocks for the AST file.
RecordData Record;
while (true) {
  Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
  if (!MaybeEntry) {
    Error(MaybeEntry.takeError());
    return Failure;
  }
  llvm::BitstreamEntry Entry = MaybeEntry.get();

  switch (Entry.Kind) {
  case llvm::BitstreamEntry::Error:
    Error("error at end of module block in AST file");
    return Failure;
  case llvm::BitstreamEntry::EndBlock:
    // Outside of C++, we do not store a lookup map for the translation unit.
    // Instead, mark it as needing a lookup map to be built if this module
    // contains any declarations lexically within it (which it always does!).
    // This usually has no cost, since we very rarely need the lookup map for
    // the translation unit outside C++.
    if (ASTContext *Ctx = ContextObj) {
      DeclContext *DC = Ctx->getTranslationUnitDecl();
      if (DC->hasExternalLexicalStorage() && !Ctx->getLangOpts().CPlusPlus)
        DC->setMustBuildLookupTable();
    }

    return Success;
  case llvm::BitstreamEntry::SubBlock:
    switch (Entry.ID) {
    case DECLTYPES_BLOCK_ID:
      // We lazily load the decls block, but we want to set up the
      // DeclsCursor cursor to point into it.  Clone our current bitcode
      // cursor to it, enter the block and read the abbrevs in that block.
      // With the main cursor, we just skip over it.
      F.DeclsCursor = Stream;
      if (llvm::Error Err = Stream.SkipBlock()) {
        Error(std::move(Err));
        return Failure;
      }
      if (ReadBlockAbbrevs(F.DeclsCursor, DECLTYPES_BLOCK_ID)) {
        Error("malformed block record in AST file");
        return Failure;
      }
      break;

    case PREPROCESSOR_BLOCK_ID:
      F.MacroCursor = Stream;
      if (!PP.getExternalSource())
        PP.setExternalSource(this);

      if (llvm::Error Err = Stream.SkipBlock()) {
        Error(std::move(Err));
        return Failure;
      }
      if (ReadBlockAbbrevs(F.MacroCursor, PREPROCESSOR_BLOCK_ID)) {
        Error("malformed block record in AST file");
        return Failure;
      }
      F.MacroStartOffset = F.MacroCursor.GetCurrentBitNo();
      break;

    case PREPROCESSOR_DETAIL_BLOCK_ID:
      F.PreprocessorDetailCursor = Stream;

      if (llvm::Error Err = Stream.SkipBlock()) {
        Error(std::move(Err));
        return Failure;
      }
      if (ReadBlockAbbrevs(F.PreprocessorDetailCursor,
                           PREPROCESSOR_DETAIL_BLOCK_ID)) {
        Error("malformed preprocessor detail record in AST file");
        return Failure;
      }
      F.PreprocessorDetailStartOffset
      = F.PreprocessorDetailCursor.GetCurrentBitNo();

      if (!PP.getPreprocessingRecord())
        PP.createPreprocessingRecord();
      if (!PP.getPreprocessingRecord()->getExternalSource())
        PP.getPreprocessingRecord()->SetExternalSource(*this);
      break;

    case SOURCE_MANAGER_BLOCK_ID:
      if (ReadSourceManagerBlock(F))
        return Failure;
      break;

    case SUBMODULE_BLOCK_ID:
      if (ASTReadResult Result =
              ReadSubmoduleBlock(F, ClientLoadCapabilities))
        return Result;
      break;

    case COMMENTS_BLOCK_ID: {
      BitstreamCursor C = Stream;

      if (llvm::Error Err = Stream.SkipBlock()) {
        Error(std::move(Err));
        return Failure;
      }
      if (ReadBlockAbbrevs(C, COMMENTS_BLOCK_ID)) {
        Error("malformed comments block in AST file");
        return Failure;
      }
      CommentsCursors.push_back(std::make_pair(C, &F));
      break;
    }

    default:
      if (llvm::Error Err = Stream.SkipBlock()) {
        Error(std::move(Err));
        return Failure;
      }
      break;
    }
    continue;

  case llvm::BitstreamEntry::Record:
    // The interesting case.
    break;
  }

  // Read and process a record.
  Record.clear();
  StringRef Blob;
  Expected<unsigned> MaybeRecordType =
      Stream.readRecord(Entry.ID, Record, &Blob);
  if (!MaybeRecordType) {
    Error(MaybeRecordType.takeError());
    return Failure;
  }
  ASTRecordTypes RecordType = (ASTRecordTypes)MaybeRecordType.get();

  // If we're not loading an AST context, we don't care about most records.
  if (!ContextObj) {
    switch (RecordType) {
    case IDENTIFIER_TABLE:
    case IDENTIFIER_OFFSET:
    case INTERESTING_IDENTIFIERS:
    case STATISTICS:
    case PP_CONDITIONAL_STACK:
    case PP_COUNTER_VALUE:
    case SOURCE_LOCATION_OFFSETS:
    case MODULE_OFFSET_MAP:
    case SOURCE_MANAGER_LINE_TABLE:
    case SOURCE_LOCATION_PRELOADS:
    case PPD_ENTITIES_OFFSETS:
    case HEADER_SEARCH_TABLE:
    case IMPORTED_MODULES:
    case MACRO_OFFSET:
      break;
    default:
      continue;
    }
  }

  switch (RecordType) {
  default:  // Default behavior: ignore.
    break;

  case TYPE_OFFSET: {
    if (F.LocalNumTypes != 0) {
      Error("duplicate TYPE_OFFSET record in AST file");
      return Failure;
    }
    F.TypeOffsets = (const uint32_t *)Blob.data();
    F.LocalNumTypes = Record[0];
    unsigned LocalBaseTypeIndex = Record[1];
    F.BaseTypeIndex = getTotalNumTypes();

    if (F.LocalNumTypes > 0) {
      // Introduce the global -> local mapping for types within this module.
      GlobalTypeMap.insert(std::make_pair(getTotalNumTypes(), &F));

      // Introduce the local -> global mapping for types within this module.
      F.TypeRemap.insertOrReplace(
        std::make_pair(LocalBaseTypeIndex,
                       F.BaseTypeIndex - LocalBaseTypeIndex));

      TypesLoaded.resize(TypesLoaded.size() + F.LocalNumTypes);
    }
    break;
  }

  case DECL_OFFSET: {
    if (F.LocalNumDecls != 0) {
      Error("duplicate DECL_OFFSET record in AST file");
      return Failure;
    }
    F.DeclOffsets = (const DeclOffset *)Blob.data();
    F.LocalNumDecls = Record[0];
    unsigned LocalBaseDeclID = Record[1];
    F.BaseDeclID = getTotalNumDecls();

    if (F.LocalNumDecls > 0) {
      // Introduce the global -> local mapping for declarations within this
      // module.
      GlobalDeclMap.insert(
        std::make_pair(getTotalNumDecls() + NUM_PREDEF_DECL_IDS, &F));

      // Introduce the local -> global mapping for declarations within this
      // module.
      F.DeclRemap.insertOrReplace(
        std::make_pair(LocalBaseDeclID, F.BaseDeclID - LocalBaseDeclID));

      // Introduce the global -> local mapping for declarations within this
      // module.
      F.GlobalToLocalDeclIDs[&F] = LocalBaseDeclID;

      DeclsLoaded.resize(DeclsLoaded.size() + F.LocalNumDecls);
    }
    break;
  }

  case TU_UPDATE_LEXICAL: {
    DeclContext *TU = ContextObj->getTranslationUnitDecl();
    LexicalContents Contents(
        reinterpret_cast<const llvm::support::unaligned_uint32_t *>(
            Blob.data()),
        static_cast<unsigned int>(Blob.size() / 4));
    TULexicalDecls.push_back(std::make_pair(&F, Contents));
    TU->setHasExternalLexicalStorage(true);
    break;
  }

  case UPDATE_VISIBLE: {
    unsigned Idx = 0;
    serialization::DeclID ID = ReadDeclID(F, Record, Idx);
    auto *Data = (const unsigned char*)Blob.data();
    PendingVisibleUpdates[ID].push_back(PendingVisibleUpdate{&F, Data});
    // If we've already loaded the decl, perform the updates when we finish
    // loading this block.
    if (Decl *D = GetExistingDecl(ID))
      PendingUpdateRecords.push_back(
          PendingUpdateRecord(ID, D, /*JustLoaded=*/false));
    break;
  }

  case IDENTIFIER_TABLE:
    F.IdentifierTableData = Blob.data();
    if (Record[0]) {
      F.IdentifierLookupTable = ASTIdentifierLookupTable::Create(
          (const unsigned char *)F.IdentifierTableData + Record[0],
          (const unsigned char *)F.IdentifierTableData + sizeof(uint32_t),
          (const unsigned char *)F.IdentifierTableData,
          ASTIdentifierLookupTrait(*this, F));

      PP.getIdentifierTable().setExternalIdentifierLookup(this);
    }
    break;

  case IDENTIFIER_OFFSET: {
    if (F.LocalNumIdentifiers != 0) {
      Error("duplicate IDENTIFIER_OFFSET record in AST file");
      return Failure;
    }
    F.IdentifierOffsets = (const uint32_t *)Blob.data();
    F.LocalNumIdentifiers = Record[0];
    unsigned LocalBaseIdentifierID = Record[1];
    F.BaseIdentifierID = getTotalNumIdentifiers();

    if (F.LocalNumIdentifiers > 0) {
      // Introduce the global -> local mapping for identifiers within this
      // module.
      GlobalIdentifierMap.insert(std::make_pair(getTotalNumIdentifiers() + 1,
                                                &F));

      // Introduce the local -> global mapping for identifiers within this
      // module.
      F.IdentifierRemap.insertOrReplace(
        std::make_pair(LocalBaseIdentifierID,
                       F.BaseIdentifierID - LocalBaseIdentifierID));

      IdentifiersLoaded.resize(IdentifiersLoaded.size()
                               + F.LocalNumIdentifiers);
    }
    break;
  }

  case INTERESTING_IDENTIFIERS:
    F.PreloadIdentifierOffsets.assign(Record.begin(), Record.end());
    break;

  case EAGERLY_DESERIALIZED_DECLS:
    // FIXME: Skip reading this record if our ASTConsumer doesn't care
    // about "interesting" decls (for instance, if we're building a module).
    for (unsigned I = 0, N = Record.size(); I != N; ++I)
      EagerlyDeserializedDecls.push_back(getGlobalDeclID(F, Record[I]));
    break;

  case MODULAR_CODEGEN_DECLS:
    // FIXME: Skip reading this record if our ASTConsumer doesn't care about
    // them (ie: if we're not codegenerating this module).
    if (F.Kind == MK_MainFile)
      for (unsigned I = 0, N = Record.size(); I != N; ++I)
        EagerlyDeserializedDecls.push_back(getGlobalDeclID(F, Record[I]));
    break;

  case SPECIAL_TYPES:
    if (SpecialTypes.empty()) {
      for (unsigned I = 0, N = Record.size(); I != N; ++I)
        SpecialTypes.push_back(getGlobalTypeID(F, Record[I]));
      break;
    }

    if (SpecialTypes.size() != Record.size()) {
      Error("invalid special-types record");
      return Failure;
    }

    for (unsigned I = 0, N = Record.size(); I != N; ++I) {
      serialization::TypeID ID = getGlobalTypeID(F, Record[I]);
      if (!SpecialTypes[I])
        SpecialTypes[I] = ID;
      // FIXME: If ID && SpecialTypes[I] != ID, do we need a separate
      // merge step?
    }
    break;

  case STATISTICS:
    TotalNumStatements += Record[0];
    TotalNumMacros += Record[1];
    TotalLexicalDeclContexts += Record[2];
    TotalVisibleDeclContexts += Record[3];
    break;

  case UNUSED_FILESCOPED_DECLS:
    for (unsigned I = 0, N = Record.size(); I != N; ++I)
      UnusedFileScopedDecls.push_back(getGlobalDeclID(F, Record[I]));
    break;

  case DELEGATING_CTORS:
    for (unsigned I = 0, N = Record.size(); I != N; ++I)
      DelegatingCtorDecls.push_back(getGlobalDeclID(F, Record[I]));
    break;

  case WEAK_UNDECLARED_IDENTIFIERS:
    if (Record.size() % 4 != 0) {
      Error("invalid weak identifiers record");
      return Failure;
    }

    // FIXME: Ignore weak undeclared identifiers from non-original PCH
    // files. This isn't the way to do it :)
    WeakUndeclaredIdentifiers.clear();

    // Translate the weak, undeclared identifiers into global IDs.
    for (unsigned I = 0, N = Record.size(); I < N; /* in loop */) {
      WeakUndeclaredIdentifiers.push_back(
        getGlobalIdentifierID(F, Record[I++]));
      WeakUndeclaredIdentifiers.push_back(
        getGlobalIdentifierID(F, Record[I++]));
      WeakUndeclaredIdentifiers.push_back(
        ReadSourceLocation(F, Record, I).getRawEncoding());
      WeakUndeclaredIdentifiers.push_back(Record[I++]);
    }
    break;

  case SELECTOR_OFFSETS: {
    F.SelectorOffsets = (const uint32_t *)Blob.data();
    F.LocalNumSelectors = Record[0];
    unsigned LocalBaseSelectorID = Record[1];
    F.BaseSelectorID = getTotalNumSelectors();

    if (F.LocalNumSelectors > 0) {
      // Introduce the global -> local mapping for selectors within this
      // module.
      GlobalSelectorMap.insert(std::make_pair(getTotalNumSelectors()+1, &F));

      // Introduce the local -> global mapping for selectors within this
      // module.
      F.SelectorRemap.insertOrReplace(
        std::make_pair(LocalBaseSelectorID,
                       F.BaseSelectorID - LocalBaseSelectorID));

      SelectorsLoaded.resize(SelectorsLoaded.size() + F.LocalNumSelectors);
    }
    break;
  }

  case METHOD_POOL:
    F.SelectorLookupTableData = (const unsigned char *)Blob.data();
    if (Record[0])
      F.SelectorLookupTable
        = ASTSelectorLookupTable::Create(
                      F.SelectorLookupTableData + Record[0],
                      F.SelectorLookupTableData,
                      ASTSelectorLookupTrait(*this, F));
    TotalNumMethodPoolEntries += Record[1];
    break;

  case REFERENCED_SELECTOR_POOL:
    if (!Record.empty()) {
      for (unsigned Idx = 0, N = Record.size() - 1; Idx < N; /* in loop */) {
        ReferencedSelectorsData.push_back(getGlobalSelectorID(F,
                                                              Record[Idx++]));
        ReferencedSelectorsData.push_back(ReadSourceLocation(F, Record, Idx).
                                            getRawEncoding());
      }
    }
    break;

  case PP_CONDITIONAL_STACK:
    if (!Record.empty()) {
      unsigned Idx = 0, End = Record.size() - 1;
      bool ReachedEOFWhileSkipping = Record[Idx++];
      llvm::Optional<Preprocessor::PreambleSkipInfo> SkipInfo;
      if (ReachedEOFWhileSkipping) {
        SourceLocation HashToken = ReadSourceLocation(F, Record, Idx);
        SourceLocation IfTokenLoc = ReadSourceLocation(F, Record, Idx);
        bool FoundNonSkipPortion = Record[Idx++];
        bool FoundElse = Record[Idx++];
        SourceLocation ElseLoc = ReadSourceLocation(F, Record, Idx);
        SkipInfo.emplace(HashToken, IfTokenLoc, FoundNonSkipPortion,
                         FoundElse, ElseLoc);
      }
      SmallVector<PPConditionalInfo, 4> ConditionalStack;
      while (Idx < End) {
        auto Loc = ReadSourceLocation(F, Record, Idx);
        bool WasSkipping = Record[Idx++];
        bool FoundNonSkip = Record[Idx++];
        bool FoundElse = Record[Idx++];
        ConditionalStack.push_back(
            {Loc, WasSkipping, FoundNonSkip, FoundElse});
      }
      PP.setReplayablePreambleConditionalStack(ConditionalStack, SkipInfo);
    }
    break;

  case PP_COUNTER_VALUE:
    if (!Record.empty() && Listener)
      Listener->ReadCounter(F, Record[0]);
    break;

  case FILE_SORTED_DECLS:
    F.FileSortedDecls = (const DeclID *)Blob.data();
    F.NumFileSortedDecls = Record[0];
    break;

  case SOURCE_LOCATION_OFFSETS: {
    F.SLocEntryOffsets = (const uint32_t *)Blob.data();
    F.LocalNumSLocEntries = Record[0];
    unsigned SLocSpaceSize = Record[1];
    std::tie(F.SLocEntryBaseID, F.SLocEntryBaseOffset) =
        SourceMgr.AllocateLoadedSLocEntries(F.LocalNumSLocEntries,
                                            SLocSpaceSize);
    if (!F.SLocEntryBaseID) {
      Error("ran out of source locations");
      break;
    }
    // Make our entry in the range map. BaseID is negative and growing, so
    // we invert it. Because we invert it, though, we need the other end of
    // the range.
    unsigned RangeStart =
        unsigned(-F.SLocEntryBaseID) - F.LocalNumSLocEntries + 1;
    GlobalSLocEntryMap.insert(std::make_pair(RangeStart, &F));
    F.FirstLoc = SourceLocation::getFromRawEncoding(F.SLocEntryBaseOffset);

    // SLocEntryBaseOffset is lower than MaxLoadedOffset and decreasing.
    assert((F.SLocEntryBaseOffset & (1U << 31U)) == 0)(((F.SLocEntryBaseOffset & (1U << 31U)) == 0) ? static_cast
<void> (0) : __assert_fail ("(F.SLocEntryBaseOffset & (1U << 31U)) == 0"
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 3329, __PRETTY_FUNCTION__));
    GlobalSLocOffsetMap.insert(
        std::make_pair(SourceManager::MaxLoadedOffset - F.SLocEntryBaseOffset
                         - SLocSpaceSize,&F));

    // Initialize the remapping table.
    // Invalid stays invalid.
    F.SLocRemap.insertOrReplace(std::make_pair(0U, 0));
    // This module. Base was 2 when being compiled.
    F.SLocRemap.insertOrReplace(std::make_pair(2U,
                                static_cast<int>(F.SLocEntryBaseOffset - 2)));

    TotalNumSLocEntries += F.LocalNumSLocEntries;
    break;
  }

  case MODULE_OFFSET_MAP:
    F.ModuleOffsetMap = Blob;
    break;

  case SOURCE_MANAGER_LINE_TABLE:
    if (ParseLineTable(F, Record))
      return Failure;
    break;

  case SOURCE_LOCATION_PRELOADS: {
    // Need to transform from the local view (1-based IDs) to the global view,
    // which is based off F.SLocEntryBaseID.
    if (!F.PreloadSLocEntries.empty()) {
      Error("Multiple SOURCE_LOCATION_PRELOADS records in AST file");
      return Failure;
    }

    F.PreloadSLocEntries.swap(Record);
    break;
  }

  case EXT_VECTOR_DECLS:
    for (unsigned I = 0, N = Record.size(); I != N; ++I)
      ExtVectorDecls.push_back(getGlobalDeclID(F, Record[I]));
    break;

  case VTABLE_USES:
    if (Record.size() % 3 != 0) {
      Error("Invalid VTABLE_USES record");
      return Failure;
    }

    // Later tables overwrite earlier ones.
    // FIXME: Modules will have some trouble with this. This is clearly not
    // the right way to do this.
    VTableUses.clear();

    for (unsigned Idx = 0, N = Record.size(); Idx != N; /* In loop */) {
      VTableUses.push_back(getGlobalDeclID(F, Record[Idx++]));
      VTableUses.push_back(
        ReadSourceLocation(F, Record, Idx).getRawEncoding());
      VTableUses.push_back(Record[Idx++]);
    }
    break;

  case PENDING_IMPLICIT_INSTANTIATIONS:
    if (PendingInstantiations.size() % 2 != 0) {
      Error("Invalid existing PendingInstantiations");
      return Failure;
    }

    if (Record.size() % 2 != 0) {
      Error("Invalid PENDING_IMPLICIT_INSTANTIATIONS block");
      return Failure;
    }

    for (unsigned I = 0, N = Record.size(); I != N; /* in loop */) {
      PendingInstantiations.push_back(getGlobalDeclID(F, Record[I++]));
      PendingInstantiations.push_back(
        ReadSourceLocation(F, Record, I).getRawEncoding());
    }
    break;

  case SEMA_DECL_REFS:
    if (Record.size() != 3) {
      Error("Invalid SEMA_DECL_REFS block");
      return Failure;
    }
    for (unsigned I = 0, N = Record.size(); I != N; ++I)
      SemaDeclRefs.push_back(getGlobalDeclID(F, Record[I]));
    break;

  case PPD_ENTITIES_OFFSETS: {
    F.PreprocessedEntityOffsets = (const PPEntityOffset *)Blob.data();
    assert(Blob.size() % sizeof(PPEntityOffset) == 0)((Blob.size() % sizeof(PPEntityOffset) == 0) ? static_cast<
void> (0) : __assert_fail ("Blob.size() % sizeof(PPEntityOffset) == 0"
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 3419, __PRETTY_FUNCTION__));
    F.NumPreprocessedEntities = Blob.size() / sizeof(PPEntityOffset);

    unsigned LocalBasePreprocessedEntityID = Record[0];

    unsigned StartingID;
    if (!PP.getPreprocessingRecord())
      PP.createPreprocessingRecord();
    if (!PP.getPreprocessingRecord()->getExternalSource())
      PP.getPreprocessingRecord()->SetExternalSource(*this);
    StartingID
      = PP.getPreprocessingRecord()
          ->allocateLoadedEntities(F.NumPreprocessedEntities);
    F.BasePreprocessedEntityID = StartingID;

    if (F.NumPreprocessedEntities > 0) {
      // Introduce the global -> local mapping for preprocessed entities in
      // this module.
      GlobalPreprocessedEntityMap.insert(std::make_pair(StartingID, &F));

      // Introduce the local -> global mapping for preprocessed entities in
      // this module.
      F.PreprocessedEntityRemap.insertOrReplace(
        std::make_pair(LocalBasePreprocessedEntityID,
          F.BasePreprocessedEntityID - LocalBasePreprocessedEntityID));
    }

    break;
  }

  case PPD_SKIPPED_RANGES: {
    F.PreprocessedSkippedRangeOffsets = (const PPSkippedRange*)Blob.data();
    assert(Blob.size() % sizeof(PPSkippedRange) == 0)((Blob.size() % sizeof(PPSkippedRange) == 0) ? static_cast<
void> (0) : __assert_fail ("Blob.size() % sizeof(PPSkippedRange) == 0"
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 3451, __PRETTY_FUNCTION__));
    F.NumPreprocessedSkippedRanges = Blob.size() / sizeof(PPSkippedRange);

    if (!PP.getPreprocessingRecord())
      PP.createPreprocessingRecord();
    if (!PP.getPreprocessingRecord()->getExternalSource())
      PP.getPreprocessingRecord()->SetExternalSource(*this);
    F.BasePreprocessedSkippedRangeID = PP.getPreprocessingRecord()
        ->allocateSkippedRanges(F.NumPreprocessedSkippedRanges);

    if (F.NumPreprocessedSkippedRanges > 0)
      GlobalSkippedRangeMap.insert(
          std::make_pair(F.BasePreprocessedSkippedRangeID, &F));
    break;
  }

  case DECL_UPDATE_OFFSETS:
    if (Record.size() % 2 != 0) {
      Error("invalid DECL_UPDATE_OFFSETS block in AST file");
      return Failure;
    }
    for (unsigned I = 0, N = Record.size(); I != N; I += 2) {
      GlobalDeclID ID = getGlobalDeclID(F, Record[I]);
      DeclUpdateOffsets[ID].push_back(std::make_pair(&F, Record[I + 1]));

      // If we've already loaded the decl, perform the updates when we finish
      // loading this block.
      if (Decl *D = GetExistingDecl(ID))
        PendingUpdateRecords.push_back(
            PendingUpdateRecord(ID, D, /*JustLoaded=*/false));
    }
    break;

  case OBJC_CATEGORIES_MAP:
    if (F.LocalNumObjCCategoriesInMap != 0) {
      Error("duplicate OBJC_CATEGORIES_MAP record in AST file");
      return Failure;
    }

    F.LocalNumObjCCategoriesInMap = Record[0];
    F.ObjCCategoriesMap = (const ObjCCategoriesInfo *)Blob.data();
    break;

  case OBJC_CATEGORIES:
    F.ObjCCategories.swap(Record);
    break;

  case CUDA_SPECIAL_DECL_REFS:
    // Later tables overwrite earlier ones.
    // FIXME: Modules will have trouble with this.
    CUDASpecialDeclRefs.clear();
    for (unsigned I = 0, N = Record.size(); I != N; ++I)
      CUDASpecialDeclRefs.push_back(getGlobalDeclID(F, Record[I]));
    break;

  case HEADER_SEARCH_TABLE:
    F.HeaderFileInfoTableData = Blob.data();
    F.LocalNumHeaderFileInfos = Record[1];
    if (Record[0]) {
      F.HeaderFileInfoTable
        = HeaderFileInfoLookupTable::Create(
                 (const unsigned char *)F.HeaderFileInfoTableData + Record[0],
                 (const unsigned char *)F.HeaderFileInfoTableData,
                 HeaderFileInfoTrait(*this, F,
                                     &PP.getHeaderSearchInfo(),
                                     Blob.data() + Record[2]));

      PP.getHeaderSearchInfo().SetExternalSource(this);
      if (!PP.getHeaderSearchInfo().getExternalLookup())
        PP.getHeaderSearchInfo().SetExternalLookup(this);
    }
    break;

  case FP_PRAGMA_OPTIONS:
    // Later tables overwrite earlier ones.
    FPPragmaOptions.swap(Record);
    break;

  case OPENCL_EXTENSIONS:
    for (unsigned I = 0, E = Record.size(); I != E; ) {
      auto Name = ReadString(Record, I);
      auto &Opt = OpenCLExtensions.OptMap[Name];
      Opt.Supported = Record[I++] != 0;
      Opt.Enabled = Record[I++] != 0;
      Opt.Avail = Record[I++];
      Opt.Core = Record[I++];
    }
    break;

  case OPENCL_EXTENSION_TYPES:
    for (unsigned I = 0, E = Record.size(); I != E;) {
      auto TypeID = static_cast<::TypeID>(Record[I++]);
      auto *Type = GetType(TypeID).getTypePtr();
      auto NumExt = static_cast<unsigned>(Record[I++]);
      for (unsigned II = 0; II != NumExt; ++II) {
        auto Ext = ReadString(Record, I);
        OpenCLTypeExtMap[Type].insert(Ext);
      }
    }
    break;

  case OPENCL_EXTENSION_DECLS:
    for (unsigned I = 0, E = Record.size(); I != E;) {
      auto DeclID = static_cast<::DeclID>(Record[I++]);
      auto *Decl = GetDecl(DeclID);
      auto NumExt = static_cast<unsigned>(Record[I++]);
      for (unsigned II = 0; II != NumExt; ++II) {
        auto Ext = ReadString(Record, I);
        OpenCLDeclExtMap[Decl].insert(Ext);
      }
    }
    break;

  case TENTATIVE_DEFINITIONS:
    for (unsigned I = 0, N = Record.size(); I != N; ++I)
      TentativeDefinitions.push_back(getGlobalDeclID(F, Record[I]));
    break;

  case KNOWN_NAMESPACES:
    for (unsigned I = 0, N = Record.size(); I != N; ++I)
      KnownNamespaces.push_back(getGlobalDeclID(F, Record[I]));
    break;

  case UNDEFINED_BUT_USED:
    if (UndefinedButUsed.size() % 2 != 0) {
      Error("Invalid existing UndefinedButUsed");
      return Failure;
    }

    if (Record.size() % 2 != 0) {
      Error("invalid undefined-but-used record");
      return Failure;
    }
    for (unsigned I = 0, N = Record.size(); I != N; /* in loop */) {
      UndefinedButUsed.push_back(getGlobalDeclID(F, Record[I++]));
      UndefinedButUsed.push_back(
          ReadSourceLocation(F, Record, I).getRawEncoding());
    }
    break;

  case DELETE_EXPRS_TO_ANALYZE:
    for (unsigned I = 0, N = Record.size(); I != N;) {
      DelayedDeleteExprs.push_back(getGlobalDeclID(F, Record[I++]));
      const uint64_t Count = Record[I++];
      DelayedDeleteExprs.push_back(Count);
      for (uint64_t C = 0; C < Count; ++C) {
        DelayedDeleteExprs.push_back(ReadSourceLocation(F, Record, I).getRawEncoding());
        bool IsArrayForm = Record[I++] == 1;
        DelayedDeleteExprs.push_back(IsArrayForm);
      }
    }
    break;

  case IMPORTED_MODULES:
    if (!F.isModule()) {
      // If we aren't loading a module (which has its own exports), make
      // all of the imported modules visible.
      // FIXME: Deal with macros-only imports.
      for (unsigned I = 0, N = Record.size(); I != N; /**/) {
        unsigned GlobalID = getGlobalSubmoduleID(F, Record[I++]);
        SourceLocation Loc = ReadSourceLocation(F, Record, I);
        if (GlobalID) {
          ImportedModules.push_back(ImportedSubmodule(GlobalID, Loc));
          if (DeserializationListener)
            DeserializationListener->ModuleImportRead(GlobalID, Loc);
        }
      }
    }
    break;

  case MACRO_OFFSET: {
    if (F.LocalNumMacros != 0) {
      Error("duplicate MACRO_OFFSET record in AST file");
      return Failure;
    }
    F.MacroOffsets = (const uint32_t *)Blob.data();
    F.LocalNumMacros = Record[0];
    unsigned LocalBaseMacroID = Record[1];
    F.BaseMacroID = getTotalNumMacros();

    if (F.LocalNumMacros > 0) {
      // Introduce the global -> local mapping for macros within this module.
      GlobalMacroMap.insert(std::make_pair(getTotalNumMacros() + 1, &F));

      // Introduce the local -> global mapping for macros within this module.
      F.MacroRemap.insertOrReplace(
        std::make_pair(LocalBaseMacroID,
                       F.BaseMacroID - LocalBaseMacroID));

      MacrosLoaded.resize(MacrosLoaded.size() + F.LocalNumMacros);
    }
    break;
  }

  case LATE_PARSED_TEMPLATE:
    LateParsedTemplates.append(Record.begin(), Record.end());
    break;

  case OPTIMIZE_PRAGMA_OPTIONS:
    if (Record.size() != 1) {
      Error("invalid pragma optimize record");
      return Failure;
    }
    OptimizeOffPragmaLocation = ReadSourceLocation(F, Record[0]);
    break;

  case MSSTRUCT_PRAGMA_OPTIONS:
    if (Record.size() != 1) {
      Error("invalid pragma ms_struct record");
      return Failure;
    }
    PragmaMSStructState = Record[0];
    break;

  case POINTERS_TO_MEMBERS_PRAGMA_OPTIONS:
    if (Record.size() != 2) {
      Error("invalid pragma ms_struct record");
      return Failure;
    }
    PragmaMSPointersToMembersState = Record[0];
    PointersToMembersPragmaLocation = ReadSourceLocation(F, Record[1]);
    break;

  case UNUSED_LOCAL_TYPEDEF_NAME_CANDIDATES:
    for (unsigned I = 0, N = Record.size(); I != N; ++I)
      UnusedLocalTypedefNameCandidates.push_back(
          getGlobalDeclID(F, Record[I]));
    break;

  case CUDA_PRAGMA_FORCE_HOST_DEVICE_DEPTH:
    if (Record.size() != 1) {
      Error("invalid cuda pragma options record");
      return Failure;
    }
    ForceCUDAHostDeviceDepth = Record[0];
    break;

  case PACK_PRAGMA_OPTIONS: {
    if (Record.size() < 3) {
      Error("invalid pragma pack record");
      return Failure;
    }
    PragmaPackCurrentValue = Record[0];
    PragmaPackCurrentLocation = ReadSourceLocation(F, Record[1]);
    unsigned NumStackEntries = Record[2];
    unsigned Idx = 3;
    // Reset the stack when importing a new module.
    PragmaPackStack.clear();
    for (unsigned I = 0; I < NumStackEntries; ++I) {
      PragmaPackStackEntry Entry;
      Entry.Value = Record[Idx++];
      Entry.Location = ReadSourceLocation(F, Record[Idx++]);
      Entry.PushLocation = ReadSourceLocation(F, Record[Idx++]);
      PragmaPackStrings.push_back(ReadString(Record, Idx));
      Entry.SlotLabel = PragmaPackStrings.back();
      PragmaPackStack.push_back(Entry);
    }
    break;
  }
  }
}
3712}

3714void ASTReader::ReadModuleOffsetMap(ModuleFile &F) const {
assert(!F.ModuleOffsetMap.empty() && "no module offset map to read")((!F.ModuleOffsetMap.empty() && "no module offset map to read"
) ? static_cast<void> (0) : __assert_fail ("!F.ModuleOffsetMap.empty() && \"no module offset map to read\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 3715, __PRETTY_FUNCTION__));

// Additional remapping information.
const unsigned char *Data = (const unsigned char*)F.ModuleOffsetMap.data();
const unsigned char *DataEnd = Data + F.ModuleOffsetMap.size();
F.ModuleOffsetMap = StringRef();

// If we see this entry before SOURCE_LOCATION_OFFSETS, add placeholders.
if (F.SLocRemap.find(0) == F.SLocRemap.end()) {
  F.SLocRemap.insert(std::make_pair(0U, 0));
  F.SLocRemap.insert(std::make_pair(2U, 1));
}

// Continuous range maps we may be updating in our module.
using RemapBuilder = ContinuousRangeMap<uint32_t, int, 2>::Builder;
RemapBuilder SLocRemap(F.SLocRemap);
RemapBuilder IdentifierRemap(F.IdentifierRemap);
RemapBuilder MacroRemap(F.MacroRemap);
RemapBuilder PreprocessedEntityRemap(F.PreprocessedEntityRemap);
RemapBuilder SubmoduleRemap(F.SubmoduleRemap);
RemapBuilder SelectorRemap(F.SelectorRemap);
RemapBuilder DeclRemap(F.DeclRemap);
RemapBuilder TypeRemap(F.TypeRemap);

while (Data < DataEnd) {
  // FIXME: Looking up dependency modules by filename is horrible. Let's
  // start fixing this with prebuilt and explicit modules and see how it
  // goes...
  using namespace llvm::support;
  ModuleKind Kind = static_cast<ModuleKind>(
    endian::readNext<uint8_t, little, unaligned>(Data));
  uint16_t Len = endian::readNext<uint16_t, little, unaligned>(Data);
  StringRef Name = StringRef((const char*)Data, Len);
  Data += Len;
  ModuleFile *OM = (Kind == MK_PrebuiltModule || Kind == MK_ExplicitModule
                    ? ModuleMgr.lookupByModuleName(Name)
                    : ModuleMgr.lookupByFileName(Name));
  if (!OM) {
    std::string Msg =
        "SourceLocation remap refers to unknown module, cannot find ";
    Msg.append(Name);
    Error(Msg);
    return;
  }

  uint32_t SLocOffset =
      endian::readNext<uint32_t, little, unaligned>(Data);
  uint32_t IdentifierIDOffset =
      endian::readNext<uint32_t, little, unaligned>(Data);
  uint32_t MacroIDOffset =
      endian::readNext<uint32_t, little, unaligned>(Data);
  uint32_t PreprocessedEntityIDOffset =
      endian::readNext<uint32_t, little, unaligned>(Data);
  uint32_t SubmoduleIDOffset =
      endian::readNext<uint32_t, little, unaligned>(Data);
  uint32_t SelectorIDOffset =
      endian::readNext<uint32_t, little, unaligned>(Data);
  uint32_t DeclIDOffset =
      endian::readNext<uint32_t, little, unaligned>(Data);
  uint32_t TypeIndexOffset =
      endian::readNext<uint32_t, little, unaligned>(Data);

  uint32_t None = std::numeric_limits<uint32_t>::max();

  auto mapOffset = [&](uint32_t Offset, uint32_t BaseOffset,
                       RemapBuilder &Remap) {
    if (Offset != None)
      Remap.insert(std::make_pair(Offset,
                                  static_cast<int>(BaseOffset - Offset)));
  };
  mapOffset(SLocOffset, OM->SLocEntryBaseOffset, SLocRemap);
  mapOffset(IdentifierIDOffset, OM->BaseIdentifierID, IdentifierRemap);
  mapOffset(MacroIDOffset, OM->BaseMacroID, MacroRemap);
  mapOffset(PreprocessedEntityIDOffset, OM->BasePreprocessedEntityID,
            PreprocessedEntityRemap);
  mapOffset(SubmoduleIDOffset, OM->BaseSubmoduleID, SubmoduleRemap);
  mapOffset(SelectorIDOffset, OM->BaseSelectorID, SelectorRemap);
  mapOffset(DeclIDOffset, OM->BaseDeclID, DeclRemap);
  mapOffset(TypeIndexOffset, OM->BaseTypeIndex, TypeRemap);

  // Global -> local mappings.
  F.GlobalToLocalDeclIDs[OM] = DeclIDOffset;
}
3798}

3800ASTReader::ASTReadResult
3801ASTReader::ReadModuleMapFileBlock(RecordData &Record, ModuleFile &F,
                                const ModuleFile *ImportedBy,
                                unsigned ClientLoadCapabilities) {
unsigned Idx = 0;
F.ModuleMapPath = ReadPath(F, Record, Idx);

// Try to resolve ModuleName in the current header search context and
// verify that it is found in the same module map file as we saved. If the
// top-level AST file is a main file, skip this check because there is no
// usable header search context.
assert(!F.ModuleName.empty() &&((!F.ModuleName.empty() && "MODULE_NAME should come before MODULE_MAP_FILE"
) ? static_cast<void> (0) : __assert_fail ("!F.ModuleName.empty() && \"MODULE_NAME should come before MODULE_MAP_FILE\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 3812, __PRETTY_FUNCTION__))
       "MODULE_NAME should come before MODULE_MAP_FILE")((!F.ModuleName.empty() && "MODULE_NAME should come before MODULE_MAP_FILE"
) ? static_cast<void> (0) : __assert_fail ("!F.ModuleName.empty() && \"MODULE_NAME should come before MODULE_MAP_FILE\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 3812, __PRETTY_FUNCTION__));
if (F.Kind == MK_ImplicitModule && ModuleMgr.begin()->Kind != MK_MainFile) {
  // An implicitly-loaded module file should have its module listed in some
  // module map file that we've already loaded.
  Module *M = PP.getHeaderSearchInfo().lookupModule(F.ModuleName);
  auto &Map = PP.getHeaderSearchInfo().getModuleMap();
  const FileEntry *ModMap = M ? Map.getModuleMapFileForUniquing(M) : nullptr;
  // Don't emit module relocation error if we have -fno-validate-pch
  if (!PP.getPreprocessorOpts().DisablePCHValidation && !ModMap) {
    if ((ClientLoadCapabilities & ARR_OutOfDate) == 0) {
      if (auto *ASTFE = M ? M->getASTFile() : nullptr) {
        // This module was defined by an imported (explicit) module.
        Diag(diag::err_module_file_conflict) << F.ModuleName << F.FileName
                                             << ASTFE->getName();
      } else {
        // This module was built with a different module map.
        Diag(diag::err_imported_module_not_found)
            << F.ModuleName << F.FileName
            << (ImportedBy ? ImportedBy->FileName : "") << F.ModuleMapPath
            << !ImportedBy;
        // In case it was imported by a PCH, there's a chance the user is
        // just missing to include the search path to the directory containing
        // the modulemap.
        if (ImportedBy && ImportedBy->Kind == MK_PCH)
          Diag(diag::note_imported_by_pch_module_not_found)
              << llvm::sys::path::parent_path(F.ModuleMapPath);
      }
    }
    return OutOfDate;
  }

  assert(M->Name == F.ModuleName && "found module with different name")((M->Name == F.ModuleName && "found module with different name"
) ? static_cast<void> (0) : __assert_fail ("M->Name == F.ModuleName && \"found module with different name\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 3843, __PRETTY_FUNCTION__));

  // Check the primary module map file.
  auto StoredModMap = FileMgr.getFile(F.ModuleMapPath);
  if (!StoredModMap || *StoredModMap != ModMap) {
    assert(ModMap && "found module is missing module map file")((ModMap && "found module is missing module map file"
) ? static_cast<void> (0) : __assert_fail ("ModMap && \"found module is missing module map file\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 3848, __PRETTY_FUNCTION__));
    assert((ImportedBy || F.Kind == MK_ImplicitModule) &&(((ImportedBy || F.Kind == MK_ImplicitModule) && "top-level import should be verified"
) ? static_cast<void> (0) : __assert_fail ("(ImportedBy || F.Kind == MK_ImplicitModule) && \"top-level import should be verified\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 3850, __PRETTY_FUNCTION__))
           "top-level import should be verified")(((ImportedBy || F.Kind == MK_ImplicitModule) && "top-level import should be verified"
) ? static_cast<void> (0) : __assert_fail ("(ImportedBy || F.Kind == MK_ImplicitModule) && \"top-level import should be verified\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 3850, __PRETTY_FUNCTION__));
    bool NotImported = F.Kind == MK_ImplicitModule && !ImportedBy;
    if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
      Diag(diag::err_imported_module_modmap_changed)
          << F.ModuleName << (NotImported ? F.FileName : ImportedBy->FileName)
          << ModMap->getName() << F.ModuleMapPath << NotImported;
    return OutOfDate;
  }

  llvm::SmallPtrSet<const FileEntry *, 1> AdditionalStoredMaps;
  for (unsigned I = 0, N = Record[Idx++]; I < N; ++I) {
    // FIXME: we should use input files rather than storing names.
    std::string Filename = ReadPath(F, Record, Idx);
    auto F = FileMgr.getFile(Filename, false, false);
    if (!F) {
      if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
        Error("could not find file '" + Filename +"' referenced by AST file");
      return OutOfDate;
    }
    AdditionalStoredMaps.insert(*F);
  }

  // Check any additional module map files (e.g. module.private.modulemap)
  // that are not in the pcm.
  if (auto *AdditionalModuleMaps = Map.getAdditionalModuleMapFiles(M)) {
    for (const FileEntry *ModMap : *AdditionalModuleMaps) {
      // Remove files that match
      // Note: SmallPtrSet::erase is really remove
      if (!AdditionalStoredMaps.erase(ModMap)) {
        if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
          Diag(diag::err_module_different_modmap)
            << F.ModuleName << /*new*/0 << ModMap->getName();
        return OutOfDate;
      }
    }
  }

  // Check any additional module map files that are in the pcm, but not
  // found in header search. Cases that match are already removed.
  for (const FileEntry *ModMap : AdditionalStoredMaps) {
    if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
      Diag(diag::err_module_different_modmap)
        << F.ModuleName << /*not new*/1 << ModMap->getName();
    return OutOfDate;
  }
}

if (Listener)
  Listener->ReadModuleMapFile(F.ModuleMapPath);
return Success;
3900}

3902/// Move the given method to the back of the global list of methods.
3903static void moveMethodToBackOfGlobalList(Sema &S, ObjCMethodDecl *Method) {
// Find the entry for this selector in the method pool.
Sema::GlobalMethodPool::iterator Known
  = S.MethodPool.find(Method->getSelector());
if (Known == S.MethodPool.end())
  return;

// Retrieve the appropriate method list.
ObjCMethodList &Start = Method->isInstanceMethod()? Known->second.first
                                                  : Known->second.second;
bool Found = false;
for (ObjCMethodList *List = &Start; List; List = List->getNext()) {
  if (!Found) {
    if (List->getMethod() == Method) {
      Found = true;
    } else {
      // Keep searching.
      continue;
    }
  }

  if (List->getNext())
    List->setMethod(List->getNext()->getMethod());
  else
    List->setMethod(Method);
}
3929}

3931void ASTReader::makeNamesVisible(const HiddenNames &Names, Module *Owner) {
assert(Owner->NameVisibility != Module::Hidden && "nothing to make visible?")((Owner->NameVisibility != Module::Hidden && "nothing to make visible?"
) ? static_cast<void> (0) : __assert_fail ("Owner->NameVisibility != Module::Hidden && \"nothing to make visible?\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 3932, __PRETTY_FUNCTION__));
for (Decl *D : Names) {
  bool wasHidden = D->isHidden();
  D->setVisibleDespiteOwningModule();

  if (wasHidden && SemaObj) {
    if (ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(D)) {
      moveMethodToBackOfGlobalList(*SemaObj, Method);
    }
  }
}
3943}

3945void ASTReader::makeModuleVisible(Module *Mod,
                                Module::NameVisibilityKind NameVisibility,
                                SourceLocation ImportLoc) {
llvm::SmallPtrSet<Module *, 4> Visited;
SmallVector<Module *, 4> Stack;
Stack.push_back(Mod);
while (!Stack.empty()) {
  Mod = Stack.pop_back_val();

  if (NameVisibility <= Mod->NameVisibility) {
    // This module already has this level of visibility (or greater), so
    // there is nothing more to do.
    continue;
  }

  if (!Mod->isAvailable()) {
    // Modules that aren't available cannot be made visible.
    continue;
  }

  // Update the module's name visibility.
  Mod->NameVisibility = NameVisibility;

  // If we've already deserialized any names from this module,
  // mark them as visible.
  HiddenNamesMapType::iterator Hidden = HiddenNamesMap.find(Mod);
  if (Hidden != HiddenNamesMap.end()) {
    auto HiddenNames = std::move(*Hidden);
    HiddenNamesMap.erase(Hidden);
    makeNamesVisible(HiddenNames.second, HiddenNames.first);
    assert(HiddenNamesMap.find(Mod) == HiddenNamesMap.end() &&((HiddenNamesMap.find(Mod) == HiddenNamesMap.end() &&
 "making names visible added hidden names") ? static_cast<
void> (0) : __assert_fail ("HiddenNamesMap.find(Mod) == HiddenNamesMap.end() && \"making names visible added hidden names\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 3976, __PRETTY_FUNCTION__))
           "making names visible added hidden names")((HiddenNamesMap.find(Mod) == HiddenNamesMap.end() &&
 "making names visible added hidden names") ? static_cast<
void> (0) : __assert_fail ("HiddenNamesMap.find(Mod) == HiddenNamesMap.end() && \"making names visible added hidden names\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 3976, __PRETTY_FUNCTION__));
  }

  // Push any exported modules onto the stack to be marked as visible.
  SmallVector<Module *, 16> Exports;
  Mod->getExportedModules(Exports);
  for (SmallVectorImpl<Module *>::iterator
         I = Exports.begin(), E = Exports.end(); I != E; ++I) {
    Module *Exported = *I;
    if (Visited.insert(Exported).second)
      Stack.push_back(Exported);
  }
}
3989}

3991/// We've merged the definition \p MergedDef into the existing definition
3992/// \p Def. Ensure that \p Def is made visible whenever \p MergedDef is made
3993/// visible.
3994void ASTReader::mergeDefinitionVisibility(NamedDecl *Def,
                                        NamedDecl *MergedDef) {
if (Def->isHidden()) {
  // If MergedDef is visible or becomes visible, make the definition visible.
  if (!MergedDef->isHidden())
    Def->setVisibleDespiteOwningModule();
  else {
    getContext().mergeDefinitionIntoModule(
        Def, MergedDef->getImportedOwningModule(),
        /*NotifyListeners*/ false);
    PendingMergedDefinitionsToDeduplicate.insert(Def);
  }
}
4007}

4009bool ASTReader::loadGlobalIndex() {
if (GlobalIndex)
  return false;

if (TriedLoadingGlobalIndex || !UseGlobalIndex ||
    !PP.getLangOpts().Modules)
  return true;

// Try to load the global index.
TriedLoadingGlobalIndex = true;
StringRef ModuleCachePath
  = getPreprocessor().getHeaderSearchInfo().getModuleCachePath();
std::pair<GlobalModuleIndex *, llvm::Error> Result =
    GlobalModuleIndex::readIndex(ModuleCachePath);
if (llvm::Error Err = std::move(Result.second)) {
  assert(!Result.first)((!Result.first) ? static_cast<void> (0) : __assert_fail
 ("!Result.first", "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 4024, __PRETTY_FUNCTION__));
  consumeError(std::move(Err)); // FIXME this drops errors on the floor.
  return true;
}

GlobalIndex.reset(Result.first);
ModuleMgr.setGlobalIndex(GlobalIndex.get());
return false;
4032}

4034bool ASTReader::isGlobalIndexUnavailable() const {
return PP.getLangOpts().Modules && UseGlobalIndex &&
       !hasGlobalIndex() && TriedLoadingGlobalIndex;
4037}

4039static void updateModuleTimestamp(ModuleFile &MF) {
// Overwrite the timestamp file contents so that file's mtime changes.
std::string TimestampFilename = MF.getTimestampFilename();
std::error_code EC;
llvm::raw_fd_ostream OS(TimestampFilename, EC, llvm::sys::fs::OF_Text);
if (EC)
  return;
OS << "Timestamp file\n";
OS.close();
OS.clear_error(); // Avoid triggering a fatal error.
4049}

4051/// Given a cursor at the start of an AST file, scan ahead and drop the
4052/// cursor into the start of the given block ID, returning false on success and
4053/// true on failure.
4054static bool SkipCursorToBlock(BitstreamCursor &Cursor, unsigned BlockID) {
while (true) {
  Expected<llvm::BitstreamEntry> MaybeEntry = Cursor.advance();
  if (!MaybeEntry) {
    // FIXME this drops errors on the floor.
    consumeError(MaybeEntry.takeError());
    return true;
  }
  llvm::BitstreamEntry Entry = MaybeEntry.get();

  switch (Entry.Kind) {
  case llvm::BitstreamEntry::Error:
  case llvm::BitstreamEntry::EndBlock:
    return true;

  case llvm::BitstreamEntry::Record:
    // Ignore top-level records.
    if (Expected<unsigned> Skipped = Cursor.skipRecord(Entry.ID))
      break;
    else {
      // FIXME this drops errors on the floor.
      consumeError(Skipped.takeError());
      return true;
    }

  case llvm::BitstreamEntry::SubBlock:
    if (Entry.ID == BlockID) {
      if (llvm::Error Err = Cursor.EnterSubBlock(BlockID)) {
        // FIXME this drops the error on the floor.
        consumeError(std::move(Err));
        return true;
      }
      // Found it!
      return false;
    }

    if (llvm::Error Err = Cursor.SkipBlock()) {
      // FIXME this drops the error on the floor.
      consumeError(std::move(Err));
      return true;
    }
  }
}
4097}

4099ASTReader::ASTReadResult ASTReader::ReadAST(StringRef FileName,
                                          ModuleKind Type,
                                          SourceLocation ImportLoc,
                                          unsigned ClientLoadCapabilities,
                                          SmallVectorImpl<ImportedSubmodule> *Imported) {
llvm::SaveAndRestore<SourceLocation>
  SetCurImportLocRAII(CurrentImportLoc, ImportLoc);

// Defer any pending actions until we get to the end of reading the AST file.
Deserializing AnASTFile(this);

// Bump the generation number.
unsigned PreviousGeneration = 0;
if (ContextObj)
  PreviousGeneration = incrementGeneration(*ContextObj);

unsigned NumModules = ModuleMgr.size();
SmallVector<ImportedModule, 4> Loaded;
switch (ASTReadResult ReadResult =
            ReadASTCore(FileName, Type, ImportLoc,
                        /*ImportedBy=*/nullptr, Loaded, 0, 0,
                        ASTFileSignature(), ClientLoadCapabilities)) {
case Failure:
case Missing:
case OutOfDate:
case VersionMismatch:
case ConfigurationMismatch:
case HadErrors: {
  llvm::SmallPtrSet<ModuleFile *, 4> LoadedSet;
  for (const ImportedModule &IM : Loaded)
    LoadedSet.insert(IM.Mod);

  ModuleMgr.removeModules(ModuleMgr.begin() + NumModules, LoadedSet,
                          PP.getLangOpts().Modules
                              ? &PP.getHeaderSearchInfo().getModuleMap()
                              : nullptr);

  // If we find that any modules are unusable, the global index is going
  // to be out-of-date. Just remove it.
  GlobalIndex.reset();
  ModuleMgr.setGlobalIndex(nullptr);
  return ReadResult;
}
case Success:
  break;
}

// Here comes stuff that we only do once the entire chain is loaded.

// Load the AST blocks of all of the modules that we loaded.
for (SmallVectorImpl<ImportedModule>::iterator M = Loaded.begin(),
                                            MEnd = Loaded.end();
     M != MEnd; ++M) {
  ModuleFile &F = *M->Mod;

  // Read the AST block.
  if (ASTReadResult Result = ReadASTBlock(F, ClientLoadCapabilities))
    return Result;

  // Read the extension blocks.
  while (!SkipCursorToBlock(F.Stream, EXTENSION_BLOCK_ID)) {
    if (ASTReadResult Result = ReadExtensionBlock(F))
      return Result;
  }

  // Once read, set the ModuleFile bit base offset and update the size in
  // bits of all files we've seen.
  F.GlobalBitOffset = TotalModulesSizeInBits;
  TotalModulesSizeInBits += F.SizeInBits;
  GlobalBitOffsetsMap.insert(std::make_pair(F.GlobalBitOffset, &F));

  // Preload SLocEntries.
  for (unsigned I = 0, N = F.PreloadSLocEntries.size(); I != N; ++I) {
    int Index = int(F.PreloadSLocEntries[I] - 1) + F.SLocEntryBaseID;
    // Load it through the SourceManager and don't call ReadSLocEntry()
    // directly because the entry may have already been loaded in which case
    // calling ReadSLocEntry() directly would trigger an assertion in
    // SourceManager.
    SourceMgr.getLoadedSLocEntryByID(Index);
  }

  // Map the original source file ID into the ID space of the current
  // compilation.
  if (F.OriginalSourceFileID.isValid()) {
    F.OriginalSourceFileID = FileID::get(
        F.SLocEntryBaseID + F.OriginalSourceFileID.getOpaqueValue() - 1);
  }

  // Preload all the pending interesting identifiers by marking them out of
  // date.
  for (auto Offset : F.PreloadIdentifierOffsets) {
    const unsigned char *Data = reinterpret_cast<const unsigned char *>(
        F.IdentifierTableData + Offset);

    ASTIdentifierLookupTrait Trait(*this, F);
    auto KeyDataLen = Trait.ReadKeyDataLength(Data);
    auto Key = Trait.ReadKey(Data, KeyDataLen.first);
    auto &II = PP.getIdentifierTable().getOwn(Key);
    II.setOutOfDate(true);

    // Mark this identifier as being from an AST file so that we can track
    // whether we need to serialize it.
    markIdentifierFromAST(*this, II);

    // Associate the ID with the identifier so that the writer can reuse it.
    auto ID = Trait.ReadIdentifierID(Data + KeyDataLen.first);
    SetIdentifierInfo(ID, &II);
  }
}

// Setup the import locations and notify the module manager that we've
// committed to these module files.
for (SmallVectorImpl<ImportedModule>::iterator M = Loaded.begin(),
                                            MEnd = Loaded.end();
     M != MEnd; ++M) {
  ModuleFile &F = *M->Mod;

  ModuleMgr.moduleFileAccepted(&F);

  // Set the import location.
  F.DirectImportLoc = ImportLoc;
  // FIXME: We assume that locations from PCH / preamble do not need
  // any translation.
  if (!M->ImportedBy)
    F.ImportLoc = M->ImportLoc;
  else
    F.ImportLoc = TranslateSourceLocation(*M->ImportedBy, M->ImportLoc);
}

if (!PP.getLangOpts().CPlusPlus ||
    (Type != MK_ImplicitModule && Type != MK_ExplicitModule &&
     Type != MK_PrebuiltModule)) {
  // Mark all of the identifiers in the identifier table as being out of date,
  // so that various accessors know to check the loaded modules when the
  // identifier is used.
  //
  // For C++ modules, we don't need information on many identifiers (just
  // those that provide macros or are poisoned), so we mark all of
  // the interesting ones via PreloadIdentifierOffsets.
  for (IdentifierTable::iterator Id = PP.getIdentifierTable().begin(),
                              IdEnd = PP.getIdentifierTable().end();
       Id != IdEnd; ++Id)
    Id->second->setOutOfDate(true);
}
// Mark selectors as out of date.
for (auto Sel : SelectorGeneration)
  SelectorOutOfDate[Sel.first] = true;

// Resolve any unresolved module exports.
for (unsigned I = 0, N = UnresolvedModuleRefs.size(); I != N; ++I) {
  UnresolvedModuleRef &Unresolved = UnresolvedModuleRefs[I];
  SubmoduleID GlobalID = getGlobalSubmoduleID(*Unresolved.File,Unresolved.ID);
  Module *ResolvedMod = getSubmodule(GlobalID);

  switch (Unresolved.Kind) {
  case UnresolvedModuleRef::Conflict:
    if (ResolvedMod) {
      Module::Conflict Conflict;
      Conflict.Other = ResolvedMod;
      Conflict.Message = Unresolved.String.str();
      Unresolved.Mod->Conflicts.push_back(Conflict);
    }
    continue;

  case UnresolvedModuleRef::Import:
    if (ResolvedMod)
      Unresolved.Mod->Imports.insert(ResolvedMod);
    continue;

  case UnresolvedModuleRef::Export:
    if (ResolvedMod || Unresolved.IsWildcard)
      Unresolved.Mod->Exports.push_back(
        Module::ExportDecl(ResolvedMod, Unresolved.IsWildcard));
    continue;
  }
}
UnresolvedModuleRefs.clear();

if (Imported)
  Imported->append(ImportedModules.begin(),
                   ImportedModules.end());

// FIXME: How do we load the 'use'd modules? They may not be submodules.
// Might be unnecessary as use declarations are only used to build the
// module itself.

if (ContextObj)
  InitializeContext();

if (SemaObj)
  UpdateSema();

if (DeserializationListener)
  DeserializationListener->ReaderInitialized(this);

ModuleFile &PrimaryModule = ModuleMgr.getPrimaryModule();
if (PrimaryModule.OriginalSourceFileID.isValid()) {
  // If this AST file is a precompiled preamble, then set the
  // preamble file ID of the source manager to the file source file
  // from which the preamble was built.
  if (Type == MK_Preamble) {
    SourceMgr.setPreambleFileID(PrimaryModule.OriginalSourceFileID);
  } else if (Type == MK_MainFile) {
    SourceMgr.setMainFileID(PrimaryModule.OriginalSourceFileID);
  }
}

// For any Objective-C class definitions we have already loaded, make sure
// that we load any additional categories.
if (ContextObj) {
  for (unsigned I = 0, N = ObjCClassesLoaded.size(); I != N; ++I) {
    loadObjCCategories(ObjCClassesLoaded[I]->getGlobalID(),
                       ObjCClassesLoaded[I],
                       PreviousGeneration);
  }
}

if (PP.getHeaderSearchInfo()
        .getHeaderSearchOpts()
        .ModulesValidateOncePerBuildSession) {
  // Now we are certain that the module and all modules it depends on are
  // up to date.  Create or update timestamp files for modules that are
  // located in the module cache (not for PCH files that could be anywhere
  // in the filesystem).
  for (unsigned I = 0, N = Loaded.size(); I != N; ++I) {
    ImportedModule &M = Loaded[I];
    if (M.Mod->Kind == MK_ImplicitModule) {
      updateModuleTimestamp(*M.Mod);
    }
  }
}

return Success;
4332}

4334static ASTFileSignature readASTFileSignature(StringRef PCH);

4336/// Whether \p Stream doesn't start with the AST/PCH file magic number 'CPCH'.
4337static llvm::Error doesntStartWithASTFileMagic(BitstreamCursor &Stream) {
// FIXME checking magic headers is done in other places such as
// SerializedDiagnosticReader and GlobalModuleIndex, but error handling isn't
// always done the same. Unify it all with a helper.
if (!Stream.canSkipToPos(4))
  return llvm::createStringError(std::errc::illegal_byte_sequence,
                                 "file too small to contain AST file magic");
for (unsigned C : {'C', 'P', 'C', 'H'})
  if (Expected<llvm::SimpleBitstreamCursor::word_t> Res = Stream.Read(8)) {
    if (Res.get() != C)
      return llvm::createStringError(
          std::errc::illegal_byte_sequence,
          "file doesn't start with AST file magic");
  } else
    return Res.takeError();
return llvm::Error::success();
4353}

4355static unsigned moduleKindForDiagnostic(ModuleKind Kind) {
switch (Kind) {
case MK_PCH:
  return 0; // PCH
case MK_ImplicitModule:
case MK_ExplicitModule:
case MK_PrebuiltModule:
  return 1; // module
case MK_MainFile:
case MK_Preamble:
  return 2; // main source file
}
llvm_unreachable("unknown module kind")::llvm::llvm_unreachable_internal("unknown module kind", "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 4367);
4368}

4370ASTReader::ASTReadResult
4371ASTReader::ReadASTCore(StringRef FileName,
                     ModuleKind Type,
                     SourceLocation ImportLoc,
                     ModuleFile *ImportedBy,
                     SmallVectorImpl<ImportedModule> &Loaded,
                     off_t ExpectedSize, time_t ExpectedModTime,
                     ASTFileSignature ExpectedSignature,
                     unsigned ClientLoadCapabilities) {
ModuleFile *M;
std::string ErrorStr;
ModuleManager::AddModuleResult AddResult
  = ModuleMgr.addModule(FileName, Type, ImportLoc, ImportedBy,
                        getGeneration(), ExpectedSize, ExpectedModTime,
                        ExpectedSignature, readASTFileSignature,
                        M, ErrorStr);

switch (AddResult) {
case ModuleManager::AlreadyLoaded:
  Diag(diag::remark_module_import)
      << M->ModuleName << M->FileName << (ImportedBy ? true : false)
      << (ImportedBy ? StringRef(ImportedBy->ModuleName) : StringRef());
  return Success;

case ModuleManager::NewlyLoaded:
  // Load module file below.
  break;

case ModuleManager::Missing:
  // The module file was missing; if the client can handle that, return
  // it.
  if (ClientLoadCapabilities & ARR_Missing)
    return Missing;

  // Otherwise, return an error.
  Diag(diag::err_module_file_not_found) << moduleKindForDiagnostic(Type)
                                        << FileName << !ErrorStr.empty()
                                        << ErrorStr;
  return Failure;

case ModuleManager::OutOfDate:
  // We couldn't load the module file because it is out-of-date. If the
  // client can handle out-of-date, return it.
  if (ClientLoadCapabilities & ARR_OutOfDate)
    return OutOfDate;

  // Otherwise, return an error.
  Diag(diag::err_module_file_out_of_date) << moduleKindForDiagnostic(Type)
                                          << FileName << !ErrorStr.empty()
                                          << ErrorStr;
  return Failure;
}

assert(M && "Missing module file")((M && "Missing module file") ? static_cast<void>
 (0) : __assert_fail ("M && \"Missing module file\"",
 "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 4423, __PRETTY_FUNCTION__));

bool ShouldFinalizePCM = false;
auto FinalizeOrDropPCM = llvm::make_scope_exit([&]() {
  auto &MC = getModuleManager().getModuleCache();
  if (ShouldFinalizePCM)
    MC.finalizePCM(FileName);
  else
    MC.tryToDropPCM(FileName);
});
ModuleFile &F = *M;
BitstreamCursor &Stream = F.Stream;
Stream = BitstreamCursor(PCHContainerRdr.ExtractPCH(*F.Buffer));
F.SizeInBits = F.Buffer->getBufferSize() * 8;

// Sniff for the signature.
if (llvm::Error Err = doesntStartWithASTFileMagic(Stream)) {
  Diag(diag::err_module_file_invalid)
      << moduleKindForDiagnostic(Type) << FileName << std::move(Err);
  return Failure;
}

// This is used for compatibility with older PCH formats.
bool HaveReadControlBlock = false;
while (true) {
  Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
  if (!MaybeEntry) {
    Error(MaybeEntry.takeError());
    return Failure;
  }
  llvm::BitstreamEntry Entry = MaybeEntry.get();

  switch (Entry.Kind) {
  case llvm::BitstreamEntry::Error:
  case llvm::BitstreamEntry::Record:
  case llvm::BitstreamEntry::EndBlock:
    Error("invalid record at top-level of AST file");
    return Failure;

  case llvm::BitstreamEntry::SubBlock:
    break;
  }

  switch (Entry.ID) {
  case CONTROL_BLOCK_ID:
    HaveReadControlBlock = true;
    switch (ReadControlBlock(F, Loaded, ImportedBy, ClientLoadCapabilities)) {
    case Success:
      // Check that we didn't try to load a non-module AST file as a module.
      //
      // FIXME: Should we also perform the converse check? Loading a module as
      // a PCH file sort of works, but it's a bit wonky.
      if ((Type == MK_ImplicitModule || Type == MK_ExplicitModule ||
           Type == MK_PrebuiltModule) &&
          F.ModuleName.empty()) {
        auto Result = (Type == MK_ImplicitModule) ? OutOfDate : Failure;
        if (Result != OutOfDate ||
            (ClientLoadCapabilities & ARR_OutOfDate) == 0)
          Diag(diag::err_module_file_not_module) << FileName;
        return Result;
      }
      break;

    case Failure: return Failure;
    case Missing: return Missing;
    case OutOfDate: return OutOfDate;
    case VersionMismatch: return VersionMismatch;
    case ConfigurationMismatch: return ConfigurationMismatch;
    case HadErrors: return HadErrors;
    }
    break;

  case AST_BLOCK_ID:
    if (!HaveReadControlBlock) {
      if ((ClientLoadCapabilities & ARR_VersionMismatch) == 0)
        Diag(diag::err_pch_version_too_old);
      return VersionMismatch;
    }

    // Record that we've loaded this module.
    Loaded.push_back(ImportedModule(M, ImportedBy, ImportLoc));
    ShouldFinalizePCM = true;
    return Success;

  case UNHASHED_CONTROL_BLOCK_ID:
    // This block is handled using look-ahead during ReadControlBlock.  We
    // shouldn't get here!
    Error("malformed block record in AST file");
    return Failure;

  default:
    if (llvm::Error Err = Stream.SkipBlock()) {
      Error(std::move(Err));
      return Failure;
    }
    break;
  }
}

llvm_unreachable("unexpected break; expected return")::llvm::llvm_unreachable_internal("unexpected break; expected return"
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 4522);
4523}

4525ASTReader::ASTReadResult
4526ASTReader::readUnhashedControlBlock(ModuleFile &F, bool WasImportedBy,
                                  unsigned ClientLoadCapabilities) {
const HeaderSearchOptions &HSOpts =
    PP.getHeaderSearchInfo().getHeaderSearchOpts();
bool AllowCompatibleConfigurationMismatch =
    F.Kind == MK_ExplicitModule || F.Kind == MK_PrebuiltModule;

ASTReadResult Result = readUnhashedControlBlockImpl(
    &F, F.Data, ClientLoadCapabilities, AllowCompatibleConfigurationMismatch,
    Listener.get(),
    WasImportedBy ? false : HSOpts.ModulesValidateDiagnosticOptions);

// If F was directly imported by another module, it's implicitly validated by
// the importing module.
if (DisableValidation || WasImportedBy ||
    (AllowConfigurationMismatch && Result == ConfigurationMismatch))
  return Success;

if (Result == Failure) {
  Error("malformed block record in AST file");
  return Failure;
}

if (Result == OutOfDate && F.Kind == MK_ImplicitModule) {
  // If this module has already been finalized in the ModuleCache, we're stuck
  // with it; we can only load a single version of each module.
  //
  // This can happen when a module is imported in two contexts: in one, as a
  // user module; in another, as a system module (due to an import from
  // another module marked with the [system] flag).  It usually indicates a
  // bug in the module map: this module should also be marked with [system].
  //
  // If -Wno-system-headers (the default), and the first import is as a
  // system module, then validation will fail during the as-user import,
  // since -Werror flags won't have been validated.  However, it's reasonable
  // to treat this consistently as a system module.
  //
  // If -Wsystem-headers, the PCM on disk was built with
  // -Wno-system-headers, and the first import is as a user module, then
  // validation will fail during the as-system import since the PCM on disk
  // doesn't guarantee that -Werror was respected.  However, the -Werror
  // flags were checked during the initial as-user import.
  if (getModuleManager().getModuleCache().isPCMFinal(F.FileName)) {
    Diag(diag::warn_module_system_bit_conflict) << F.FileName;
    return Success;
  }
}

return Result;
4575}

4577ASTReader::ASTReadResult ASTReader::readUnhashedControlBlockImpl(
  ModuleFile *F, llvm::StringRef StreamData, unsigned ClientLoadCapabilities,
  bool AllowCompatibleConfigurationMismatch, ASTReaderListener *Listener,
  bool ValidateDiagnosticOptions) {
// Initialize a stream.
BitstreamCursor Stream(StreamData);

// Sniff for the signature.
if (llvm::Error Err = doesntStartWithASTFileMagic(Stream)) {
  // FIXME this drops the error on the floor.
  consumeError(std::move(Err));
  return Failure;
}

// Scan for the UNHASHED_CONTROL_BLOCK_ID block.
if (SkipCursorToBlock(Stream, UNHASHED_CONTROL_BLOCK_ID))
  return Failure;

// Read all of the records in the options block.
RecordData Record;
ASTReadResult Result = Success;
while (true) {
  Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
  if (!MaybeEntry) {
    // FIXME this drops the error on the floor.
    consumeError(MaybeEntry.takeError());
    return Failure;
  }
  llvm::BitstreamEntry Entry = MaybeEntry.get();

  switch (Entry.Kind) {
  case llvm::BitstreamEntry::Error:
  case llvm::BitstreamEntry::SubBlock:
    return Failure;

  case llvm::BitstreamEntry::EndBlock:
    return Result;

  case llvm::BitstreamEntry::Record:
    // The interesting case.
    break;
  }

  // Read and process a record.
  Record.clear();
  Expected<unsigned> MaybeRecordType = Stream.readRecord(Entry.ID, Record);
  if (!MaybeRecordType) {
    // FIXME this drops the error.
    return Failure;
  }
  switch ((UnhashedControlBlockRecordTypes)MaybeRecordType.get()) {
  case SIGNATURE:
    if (F)
      std::copy(Record.begin(), Record.end(), F->Signature.data());
    break;
  case DIAGNOSTIC_OPTIONS: {
    bool Complain = (ClientLoadCapabilities & ARR_OutOfDate) == 0;
    if (Listener && ValidateDiagnosticOptions &&
        !AllowCompatibleConfigurationMismatch &&
        ParseDiagnosticOptions(Record, Complain, *Listener))
      Result = OutOfDate; // Don't return early.  Read the signature.
    break;
  }
  case DIAG_PRAGMA_MAPPINGS:
    if (!F)
      break;
    if (F->PragmaDiagMappings.empty())
      F->PragmaDiagMappings.swap(Record);
    else
      F->PragmaDiagMappings.insert(F->PragmaDiagMappings.end(),
                                   Record.begin(), Record.end());
    break;
  }
}
4651}

4653/// Parse a record and blob containing module file extension metadata.
4654static bool parseModuleFileExtensionMetadata(
            const SmallVectorImpl<uint64_t> &Record,
            StringRef Blob,
            ModuleFileExtensionMetadata &Metadata) {
if (Record.size() < 4) return true;

Metadata.MajorVersion = Record[0];
Metadata.MinorVersion = Record[1];

unsigned BlockNameLen = Record[2];
unsigned UserInfoLen = Record[3];

if (BlockNameLen + UserInfoLen > Blob.size()) return true;

Metadata.BlockName = std::string(Blob.data(), Blob.data() + BlockNameLen);
Metadata.UserInfo = std::string(Blob.data() + BlockNameLen,
                                Blob.data() + BlockNameLen + UserInfoLen);
return false;
4672}

4674ASTReader::ASTReadResult ASTReader::ReadExtensionBlock(ModuleFile &F) {
BitstreamCursor &Stream = F.Stream;

RecordData Record;
while (true) {
  Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
  if (!MaybeEntry) {
    Error(MaybeEntry.takeError());
    return Failure;
  }
  llvm::BitstreamEntry Entry = MaybeEntry.get();

  switch (Entry.Kind) {
  case llvm::BitstreamEntry::SubBlock:
    if (llvm::Error Err = Stream.SkipBlock()) {
      Error(std::move(Err));
      return Failure;
    }
    continue;

  case llvm::BitstreamEntry::EndBlock:
    return Success;

  case llvm::BitstreamEntry::Error:
    return HadErrors;

  case llvm::BitstreamEntry::Record:
    break;
  }

  Record.clear();
  StringRef Blob;
  Expected<unsigned> MaybeRecCode =
      Stream.readRecord(Entry.ID, Record, &Blob);
  if (!MaybeRecCode) {
    Error(MaybeRecCode.takeError());
    return Failure;
  }
  switch (MaybeRecCode.get()) {
  case EXTENSION_METADATA: {
    ModuleFileExtensionMetadata Metadata;
    if (parseModuleFileExtensionMetadata(Record, Blob, Metadata))
      return Failure;

    // Find a module file extension with this block name.
    auto Known = ModuleFileExtensions.find(Metadata.BlockName);
    if (Known == ModuleFileExtensions.end()) break;

    // Form a reader.
    if (auto Reader = Known->second->createExtensionReader(Metadata, *this,
                                                           F, Stream)) {
      F.ExtensionReaders.push_back(std::move(Reader));
    }

    break;
  }
  }
}

return Success;
4734}

4736void ASTReader::InitializeContext() {
assert(ContextObj && "no context to initialize")((ContextObj && "no context to initialize") ? static_cast
<void> (0) : __assert_fail ("ContextObj && \"no context to initialize\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 4737, __PRETTY_FUNCTION__));
ASTContext &Context = *ContextObj;

// If there's a listener, notify them that we "read" the translation unit.
if (DeserializationListener)
  DeserializationListener->DeclRead(PREDEF_DECL_TRANSLATION_UNIT_ID,
                                    Context.getTranslationUnitDecl());

// FIXME: Find a better way to deal with collisions between these
// built-in types. Right now, we just ignore the problem.

// Load the special types.
if (SpecialTypes.size() >= NumSpecialTypeIDs) {
  if (unsigned String = SpecialTypes[SPECIAL_TYPE_CF_CONSTANT_STRING]) {
    if (!Context.CFConstantStringTypeDecl)
      Context.setCFConstantStringType(GetType(String));
  }

  if (unsigned File = SpecialTypes[SPECIAL_TYPE_FILE]) {
    QualType FileType = GetType(File);
    if (FileType.isNull()) {
      Error("FILE type is NULL");
      return;
    }

    if (!Context.FILEDecl) {
      if (const TypedefType *Typedef = FileType->getAs<TypedefType>())
        Context.setFILEDecl(Typedef->getDecl());
      else {
        const TagType *Tag = FileType->getAs<TagType>();
        if (!Tag) {
          Error("Invalid FILE type in AST file");
          return;
        }
        Context.setFILEDecl(Tag->getDecl());
      }
    }
  }

  if (unsigned Jmp_buf = SpecialTypes[SPECIAL_TYPE_JMP_BUF]) {
    QualType Jmp_bufType = GetType(Jmp_buf);
    if (Jmp_bufType.isNull()) {
      Error("jmp_buf type is NULL");
      return;
    }

    if (!Context.jmp_bufDecl) {
      if (const TypedefType *Typedef = Jmp_bufType->getAs<TypedefType>())
        Context.setjmp_bufDecl(Typedef->getDecl());
      else {
        const TagType *Tag = Jmp_bufType->getAs<TagType>();
        if (!Tag) {
          Error("Invalid jmp_buf type in AST file");
          return;
        }
        Context.setjmp_bufDecl(Tag->getDecl());
      }
    }
  }

  if (unsigned Sigjmp_buf = SpecialTypes[SPECIAL_TYPE_SIGJMP_BUF]) {
    QualType Sigjmp_bufType = GetType(Sigjmp_buf);
    if (Sigjmp_bufType.isNull()) {
      Error("sigjmp_buf type is NULL");
      return;
    }

    if (!Context.sigjmp_bufDecl) {
      if (const TypedefType *Typedef = Sigjmp_bufType->getAs<TypedefType>())
        Context.setsigjmp_bufDecl(Typedef->getDecl());
      else {
        const TagType *Tag = Sigjmp_bufType->getAs<TagType>();
        assert(Tag && "Invalid sigjmp_buf type in AST file")((Tag && "Invalid sigjmp_buf type in AST file") ? static_cast
<void> (0) : __assert_fail ("Tag && \"Invalid sigjmp_buf type in AST file\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 4809, __PRETTY_FUNCTION__));
        Context.setsigjmp_bufDecl(Tag->getDecl());
      }
    }
  }

  if (unsigned ObjCIdRedef
        = SpecialTypes[SPECIAL_TYPE_OBJC_ID_REDEFINITION]) {
    if (Context.ObjCIdRedefinitionType.isNull())
      Context.ObjCIdRedefinitionType = GetType(ObjCIdRedef);
  }

  if (unsigned ObjCClassRedef
        = SpecialTypes[SPECIAL_TYPE_OBJC_CLASS_REDEFINITION]) {
    if (Context.ObjCClassRedefinitionType.isNull())
      Context.ObjCClassRedefinitionType = GetType(ObjCClassRedef);
  }

  if (unsigned ObjCSelRedef
        = SpecialTypes[SPECIAL_TYPE_OBJC_SEL_REDEFINITION]) {
    if (Context.ObjCSelRedefinitionType.isNull())
      Context.ObjCSelRedefinitionType = GetType(ObjCSelRedef);
  }

  if (unsigned Ucontext_t = SpecialTypes[SPECIAL_TYPE_UCONTEXT_T]) {
    QualType Ucontext_tType = GetType(Ucontext_t);
    if (Ucontext_tType.isNull()) {
      Error("ucontext_t type is NULL");
      return;
    }

    if (!Context.ucontext_tDecl) {
      if (const TypedefType *Typedef = Ucontext_tType->getAs<TypedefType>())
        Context.setucontext_tDecl(Typedef->getDecl());
      else {
        const TagType *Tag = Ucontext_tType->getAs<TagType>();
        assert(Tag && "Invalid ucontext_t type in AST file")((Tag && "Invalid ucontext_t type in AST file") ? static_cast
<void> (0) : __assert_fail ("Tag && \"Invalid ucontext_t type in AST file\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 4845, __PRETTY_FUNCTION__));
        Context.setucontext_tDecl(Tag->getDecl());
      }
    }
  }
}

ReadPragmaDiagnosticMappings(Context.getDiagnostics());

// If there were any CUDA special declarations, deserialize them.
if (!CUDASpecialDeclRefs.empty()) {
  assert(CUDASpecialDeclRefs.size() == 1 && "More decl refs than expected!")((CUDASpecialDeclRefs.size() == 1 && "More decl refs than expected!"
) ? static_cast<void> (0) : __assert_fail ("CUDASpecialDeclRefs.size() == 1 && \"More decl refs than expected!\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 4856, __PRETTY_FUNCTION__));
  Context.setcudaConfigureCallDecl(
                         cast<FunctionDecl>(GetDecl(CUDASpecialDeclRefs[0])));
}

// Re-export any modules that were imported by a non-module AST file.
// FIXME: This does not make macro-only imports visible again.
for (auto &Import : ImportedModules) {
  if (Module *Imported = getSubmodule(Import.ID)) {
    makeModuleVisible(Imported, Module::AllVisible,
                      /*ImportLoc=*/Import.ImportLoc);
    if (Import.ImportLoc.isValid())
      PP.makeModuleVisible(Imported, Import.ImportLoc);
    // FIXME: should we tell Sema to make the module visible too?
  }
}
ImportedModules.clear();
4873}

4875void ASTReader::finalizeForWriting() {
// Nothing to do for now.
4877}

4879/// Reads and return the signature record from \p PCH's control block, or
4880/// else returns 0.
4881static ASTFileSignature readASTFileSignature(StringRef PCH) {
BitstreamCursor Stream(PCH);
if (llvm::Error Err = doesntStartWithASTFileMagic(Stream)) {
  // FIXME this drops the error on the floor.
  consumeError(std::move(Err));
  return ASTFileSignature();
}

// Scan for the UNHASHED_CONTROL_BLOCK_ID block.
if (SkipCursorToBlock(Stream, UNHASHED_CONTROL_BLOCK_ID))
  return ASTFileSignature();

// Scan for SIGNATURE inside the diagnostic options block.
ASTReader::RecordData Record;
while (true) {
  Expected<llvm::BitstreamEntry> MaybeEntry =
      Stream.advanceSkippingSubblocks();
  if (!MaybeEntry) {
    // FIXME this drops the error on the floor.
    consumeError(MaybeEntry.takeError());
    return ASTFileSignature();
  }
  llvm::BitstreamEntry Entry = MaybeEntry.get();

  if (Entry.Kind != llvm::BitstreamEntry::Record)
    return ASTFileSignature();

  Record.clear();
  StringRef Blob;
  Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record, &Blob);
  if (!MaybeRecord) {
    // FIXME this drops the error on the floor.
    consumeError(MaybeRecord.takeError());
    return ASTFileSignature();
  }
  if (SIGNATURE == MaybeRecord.get())
    return {{{(uint32_t)Record[0], (uint32_t)Record[1], (uint32_t)Record[2],
              (uint32_t)Record[3], (uint32_t)Record[4]}}};
}
4920}

4922/// Retrieve the name of the original source file name
4923/// directly from the AST file, without actually loading the AST
4924/// file.
4925std::string ASTReader::getOriginalSourceFile(
  const std::string &ASTFileName, FileManager &FileMgr,
  const PCHContainerReader &PCHContainerRdr, DiagnosticsEngine &Diags) {
// Open the AST file.
auto Buffer = FileMgr.getBufferForFile(ASTFileName);
if (!Buffer) {
  Diags.Report(diag::err_fe_unable_to_read_pch_file)
      << ASTFileName << Buffer.getError().message();
  return std::string();
}

// Initialize the stream
BitstreamCursor Stream(PCHContainerRdr.ExtractPCH(**Buffer));

// Sniff for the signature.
if (llvm::Error Err = doesntStartWithASTFileMagic(Stream)) {
  Diags.Report(diag::err_fe_not_a_pch_file) << ASTFileName << std::move(Err);
  return std::string();
}

// Scan for the CONTROL_BLOCK_ID block.
if (SkipCursorToBlock(Stream, CONTROL_BLOCK_ID)) {
  Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName;
  return std::string();
}

// Scan for ORIGINAL_FILE inside the control block.
RecordData Record;
while (true) {
  Expected<llvm::BitstreamEntry> MaybeEntry =
      Stream.advanceSkippingSubblocks();
  if (!MaybeEntry) {
    // FIXME this drops errors on the floor.
    consumeError(MaybeEntry.takeError());
    return std::string();
  }
  llvm::BitstreamEntry Entry = MaybeEntry.get();

  if (Entry.Kind == llvm::BitstreamEntry::EndBlock)
    return std::string();

  if (Entry.Kind != llvm::BitstreamEntry::Record) {
    Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName;
    return std::string();
  }

  Record.clear();
  StringRef Blob;
  Expected<unsigned> MaybeRecord = Stream.readRecord(Entry.ID, Record, &Blob);
  if (!MaybeRecord) {
    // FIXME this drops the errors on the floor.
    consumeError(MaybeRecord.takeError());
    return std::string();
  }
  if (ORIGINAL_FILE == MaybeRecord.get())
    return Blob.str();
}
4982}

4984namespace {

class SimplePCHValidator : public ASTReaderListener {
  const LangOptions &ExistingLangOpts;
  const TargetOptions &ExistingTargetOpts;
  const PreprocessorOptions &ExistingPPOpts;
  std::string ExistingModuleCachePath;
  FileManager &FileMgr;

public:
  SimplePCHValidator(const LangOptions &ExistingLangOpts,
                     const TargetOptions &ExistingTargetOpts,
                     const PreprocessorOptions &ExistingPPOpts,
                     StringRef ExistingModuleCachePath,
                     FileManager &FileMgr)
    : ExistingLangOpts(ExistingLangOpts),
      ExistingTargetOpts(ExistingTargetOpts),
      ExistingPPOpts(ExistingPPOpts),
      ExistingModuleCachePath(ExistingModuleCachePath),
      FileMgr(FileMgr) {}

  bool ReadLanguageOptions(const LangOptions &LangOpts, bool Complain,
                           bool AllowCompatibleDifferences) override {
    return checkLanguageOptions(ExistingLangOpts, LangOpts, nullptr,
                                AllowCompatibleDifferences);
  }

  bool ReadTargetOptions(const TargetOptions &TargetOpts, bool Complain,
                         bool AllowCompatibleDifferences) override {
    return checkTargetOptions(ExistingTargetOpts, TargetOpts, nullptr,
                              AllowCompatibleDifferences);
  }

  bool ReadHeaderSearchOptions(const HeaderSearchOptions &HSOpts,
                               StringRef SpecificModuleCachePath,
                               bool Complain) override {
    return checkHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
                                    ExistingModuleCachePath,
                                    nullptr, ExistingLangOpts);
  }

  bool ReadPreprocessorOptions(const PreprocessorOptions &PPOpts,
                               bool Complain,
                               std::string &SuggestedPredefines) override {
    return checkPreprocessorOptions(ExistingPPOpts, PPOpts, nullptr, FileMgr,
                                    SuggestedPredefines, ExistingLangOpts);
  }
};

5033} // namespace

5035bool ASTReader::readASTFileControlBlock(
  StringRef Filename, FileManager &FileMgr,
  const PCHContainerReader &PCHContainerRdr,
  bool FindModuleFileExtensions,
  ASTReaderListener &Listener, bool ValidateDiagnosticOptions) {
// Open the AST file.
// FIXME: This allows use of the VFS; we do not allow use of the
// VFS when actually loading a module.
auto Buffer = FileMgr.getBufferForFile(Filename);
if (!Buffer) {
  return true;
}

// Initialize the stream
StringRef Bytes = PCHContainerRdr.ExtractPCH(**Buffer);
BitstreamCursor Stream(Bytes);

// Sniff for the signature.
if (llvm::Error Err = doesntStartWithASTFileMagic(Stream)) {
  consumeError(std::move(Err)); // FIXME this drops errors on the floor.
  return true;
}

// Scan for the CONTROL_BLOCK_ID block.
if (SkipCursorToBlock(Stream, CONTROL_BLOCK_ID))
  return true;

bool NeedsInputFiles = Listener.needsInputFileVisitation();
bool NeedsSystemInputFiles = Listener.needsSystemInputFileVisitation();
bool NeedsImports = Listener.needsImportVisitation();
BitstreamCursor InputFilesCursor;

RecordData Record;
std::string ModuleDir;
bool DoneWithControlBlock = false;
while (!DoneWithControlBlock) {
  Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
  if (!MaybeEntry) {
    // FIXME this drops the error on the floor.
    consumeError(MaybeEntry.takeError());
    return true;
  }
  llvm::BitstreamEntry Entry = MaybeEntry.get();

  switch (Entry.Kind) {
  case llvm::BitstreamEntry::SubBlock: {
    switch (Entry.ID) {
    case OPTIONS_BLOCK_ID: {
      std::string IgnoredSuggestedPredefines;
      if (ReadOptionsBlock(Stream, ARR_ConfigurationMismatch | ARR_OutOfDate,
                           /*AllowCompatibleConfigurationMismatch*/ false,
                           Listener, IgnoredSuggestedPredefines) != Success)
        return true;
      break;
    }

    case INPUT_FILES_BLOCK_ID:
      InputFilesCursor = Stream;
      if (llvm::Error Err = Stream.SkipBlock()) {
        // FIXME this drops the error on the floor.
        consumeError(std::move(Err));
        return true;
      }
      if (NeedsInputFiles &&
          ReadBlockAbbrevs(InputFilesCursor, INPUT_FILES_BLOCK_ID))
        return true;
      break;

    default:
      if (llvm::Error Err = Stream.SkipBlock()) {
        // FIXME this drops the error on the floor.
        consumeError(std::move(Err));
        return true;
      }
      break;
    }

    continue;
  }

  case llvm::BitstreamEntry::EndBlock:
    DoneWithControlBlock = true;
    break;

  case llvm::BitstreamEntry::Error:
    return true;

  case llvm::BitstreamEntry::Record:
    break;
  }

  if (DoneWithControlBlock) break;

  Record.clear();
  StringRef Blob;
  Expected<unsigned> MaybeRecCode =
      Stream.readRecord(Entry.ID, Record, &Blob);
  if (!MaybeRecCode) {
    // FIXME this drops the error.
    return Failure;
  }
  switch ((ControlRecordTypes)MaybeRecCode.get()) {
  case METADATA:
    if (Record[0] != VERSION_MAJOR)
      return true;
    if (Listener.ReadFullVersionInformation(Blob))
      return true;
    break;
  case MODULE_NAME:
    Listener.ReadModuleName(Blob);
    break;
  case MODULE_DIRECTORY:
    ModuleDir = Blob;
    break;
  case MODULE_MAP_FILE: {
    unsigned Idx = 0;
    auto Path = ReadString(Record, Idx);
    ResolveImportedPath(Path, ModuleDir);
    Listener.ReadModuleMapFile(Path);
    break;
  }
  case INPUT_FILE_OFFSETS: {
    if (!NeedsInputFiles)
      break;

    unsigned NumInputFiles = Record[0];
    unsigned NumUserFiles = Record[1];
    const llvm::support::unaligned_uint64_t *InputFileOffs =
        (const llvm::support::unaligned_uint64_t *)Blob.data();
    for (unsigned I = 0; I != NumInputFiles; ++I) {
      // Go find this input file.
      bool isSystemFile = I >= NumUserFiles;

      if (isSystemFile && !NeedsSystemInputFiles)
        break; // the rest are system input files

      BitstreamCursor &Cursor = InputFilesCursor;
      SavedStreamPosition SavedPosition(Cursor);
      if (llvm::Error Err = Cursor.JumpToBit(InputFileOffs[I])) {
        // FIXME this drops errors on the floor.
        consumeError(std::move(Err));
      }

      Expected<unsigned> MaybeCode = Cursor.ReadCode();
      if (!MaybeCode) {
        // FIXME this drops errors on the floor.
        consumeError(MaybeCode.takeError());
      }
      unsigned Code = MaybeCode.get();

      RecordData Record;
      StringRef Blob;
      bool shouldContinue = false;
      Expected<unsigned> MaybeRecordType =
          Cursor.readRecord(Code, Record, &Blob);
      if (!MaybeRecordType) {
        // FIXME this drops errors on the floor.
        consumeError(MaybeRecordType.takeError());
      }
      switch ((InputFileRecordTypes)MaybeRecordType.get()) {
      case INPUT_FILE:
        bool Overridden = static_cast<bool>(Record[3]);
        std::string Filename = Blob;
        ResolveImportedPath(Filename, ModuleDir);
        shouldContinue = Listener.visitInputFile(
            Filename, isSystemFile, Overridden, /*IsExplicitModule*/false);
        break;
      }
      if (!shouldContinue)
        break;
    }
    break;
  }

  case IMPORTS: {
    if (!NeedsImports)
      break;

    unsigned Idx = 0, N = Record.size();
    while (Idx < N) {
      // Read information about the AST file.
      Idx += 1+1+1+1+5; // Kind, ImportLoc, Size, ModTime, Signature
      std::string ModuleName = ReadString(Record, Idx);
      std::string Filename = ReadString(Record, Idx);
      ResolveImportedPath(Filename, ModuleDir);
      Listener.visitImport(ModuleName, Filename);
    }
    break;
  }

  default:
    // No other validation to perform.
    break;
  }
}

// Look for module file extension blocks, if requested.
if (FindModuleFileExtensions) {
  BitstreamCursor SavedStream = Stream;
  while (!SkipCursorToBlock(Stream, EXTENSION_BLOCK_ID)) {
    bool DoneWithExtensionBlock = false;
    while (!DoneWithExtensionBlock) {
      Expected<llvm::BitstreamEntry> MaybeEntry = Stream.advance();
      if (!MaybeEntry) {
        // FIXME this drops the error.
        return true;
      }
      llvm::BitstreamEntry Entry = MaybeEntry.get();

      switch (Entry.Kind) {
      case llvm::BitstreamEntry::SubBlock:
        if (llvm::Error Err = Stream.SkipBlock()) {
          // FIXME this drops the error on the floor.
          consumeError(std::move(Err));
          return true;
        }
        continue;

      case llvm::BitstreamEntry::EndBlock:
        DoneWithExtensionBlock = true;
        continue;

      case llvm::BitstreamEntry::Error:
        return true;

      case llvm::BitstreamEntry::Record:
        break;
      }

     Record.clear();
     StringRef Blob;
     Expected<unsigned> MaybeRecCode =
         Stream.readRecord(Entry.ID, Record, &Blob);
     if (!MaybeRecCode) {
       // FIXME this drops the error.
       return true;
     }
     switch (MaybeRecCode.get()) {
     case EXTENSION_METADATA: {
       ModuleFileExtensionMetadata Metadata;
       if (parseModuleFileExtensionMetadata(Record, Blob, Metadata))
         return true;

       Listener.readModuleFileExtension(Metadata);
       break;
     }
     }
    }
  }
  Stream = SavedStream;
}

// Scan for the UNHASHED_CONTROL_BLOCK_ID block.
if (readUnhashedControlBlockImpl(
        nullptr, Bytes, ARR_ConfigurationMismatch | ARR_OutOfDate,
        /*AllowCompatibleConfigurationMismatch*/ false, &Listener,
        ValidateDiagnosticOptions) != Success)
  return true;

return false;
5295}

5297bool ASTReader::isAcceptableASTFile(StringRef Filename, FileManager &FileMgr,
                                  const PCHContainerReader &PCHContainerRdr,
                                  const LangOptions &LangOpts,
                                  const TargetOptions &TargetOpts,
                                  const PreprocessorOptions &PPOpts,
                                  StringRef ExistingModuleCachePath) {
SimplePCHValidator validator(LangOpts, TargetOpts, PPOpts,
                             ExistingModuleCachePath, FileMgr);
return !readASTFileControlBlock(Filename, FileMgr, PCHContainerRdr,
                                /*FindModuleFileExtensions=*/false,
                                validator,
                                /*ValidateDiagnosticOptions=*/true);
5309}

5311ASTReader::ASTReadResult
5312ASTReader::ReadSubmoduleBlock(ModuleFile &F, unsigned ClientLoadCapabilities) {
// Enter the submodule block.
if (llvm::Error Err = F.Stream.EnterSubBlock(SUBMODULE_BLOCK_ID)) {
  Error(std::move(Err));
  return Failure;
}

ModuleMap &ModMap = PP.getHeaderSearchInfo().getModuleMap();
bool First = true;
Module *CurrentModule = nullptr;
RecordData Record;
while (true) {
  Expected<llvm::BitstreamEntry> MaybeEntry =
      F.Stream.advanceSkippingSubblocks();
  if (!MaybeEntry) {
    Error(MaybeEntry.takeError());
    return Failure;
  }
  llvm::BitstreamEntry Entry = MaybeEntry.get();

  switch (Entry.Kind) {
  case llvm::BitstreamEntry::SubBlock: // Handled for us already.
  case llvm::BitstreamEntry::Error:
    Error("malformed block record in AST file");
    return Failure;
  case llvm::BitstreamEntry::EndBlock:
    return Success;
  case llvm::BitstreamEntry::Record:
    // The interesting case.
    break;
  }

  // Read a record.
  StringRef Blob;
  Record.clear();
  Expected<unsigned> MaybeKind = F.Stream.readRecord(Entry.ID, Record, &Blob);
  if (!MaybeKind) {
    Error(MaybeKind.takeError());
    return Failure;
  }
  unsigned Kind = MaybeKind.get();

  if ((Kind == SUBMODULE_METADATA) != First) {
    Error("submodule metadata record should be at beginning of block");
    return Failure;
  }
  First = false;

  // Submodule information is only valid if we have a current module.
  // FIXME: Should we error on these cases?
  if (!CurrentModule && Kind != SUBMODULE_METADATA &&
      Kind != SUBMODULE_DEFINITION)
    continue;

  switch (Kind) {
  default:  // Default behavior: ignore.
    break;

  case SUBMODULE_DEFINITION: {
    if (Record.size() < 12) {
      Error("malformed module definition");
      return Failure;
    }

    StringRef Name = Blob;
    unsigned Idx = 0;
    SubmoduleID GlobalID = getGlobalSubmoduleID(F, Record[Idx++]);
    SubmoduleID Parent = getGlobalSubmoduleID(F, Record[Idx++]);
    Module::ModuleKind Kind = (Module::ModuleKind)Record[Idx++];
    bool IsFramework = Record[Idx++];
    bool IsExplicit = Record[Idx++];
    bool IsSystem = Record[Idx++];
    bool IsExternC = Record[Idx++];
    bool InferSubmodules = Record[Idx++];
    bool InferExplicitSubmodules = Record[Idx++];
    bool InferExportWildcard = Record[Idx++];
    bool ConfigMacrosExhaustive = Record[Idx++];
    bool ModuleMapIsPrivate = Record[Idx++];

    Module *ParentModule = nullptr;
    if (Parent)
      ParentModule = getSubmodule(Parent);

    // Retrieve this (sub)module from the module map, creating it if
    // necessary.
    CurrentModule =
        ModMap.findOrCreateModule(Name, ParentModule, IsFramework, IsExplicit)
            .first;

    // FIXME: set the definition loc for CurrentModule, or call
    // ModMap.setInferredModuleAllowedBy()

    SubmoduleID GlobalIndex = GlobalID - NUM_PREDEF_SUBMODULE_IDS;
    if (GlobalIndex >= SubmodulesLoaded.size() ||
        SubmodulesLoaded[GlobalIndex]) {
      Error("too many submodules");
      return Failure;
    }

    if (!ParentModule) {
      if (const FileEntry *CurFile = CurrentModule->getASTFile()) {
        // Don't emit module relocation error if we have -fno-validate-pch
        if (!PP.getPreprocessorOpts().DisablePCHValidation &&
            CurFile != F.File) {
          if (!Diags.isDiagnosticInFlight()) {
            Diag(diag::err_module_file_conflict)
              << CurrentModule->getTopLevelModuleName()
              << CurFile->getName()
              << F.File->getName();
          }
          return Failure;
        }
      }

      CurrentModule->setASTFile(F.File);
      CurrentModule->PresumedModuleMapFile = F.ModuleMapPath;
    }

    CurrentModule->Kind = Kind;
    CurrentModule->Signature = F.Signature;
    CurrentModule->IsFromModuleFile = true;
    CurrentModule->IsSystem = IsSystem || CurrentModule->IsSystem;
    CurrentModule->IsExternC = IsExternC;
    CurrentModule->InferSubmodules = InferSubmodules;
    CurrentModule->InferExplicitSubmodules = InferExplicitSubmodules;
    CurrentModule->InferExportWildcard = InferExportWildcard;
    CurrentModule->ConfigMacrosExhaustive = ConfigMacrosExhaustive;
    CurrentModule->ModuleMapIsPrivate = ModuleMapIsPrivate;
    if (DeserializationListener)
      DeserializationListener->ModuleRead(GlobalID, CurrentModule);

    SubmodulesLoaded[GlobalIndex] = CurrentModule;

    // Clear out data that will be replaced by what is in the module file.
    CurrentModule->LinkLibraries.clear();
    CurrentModule->ConfigMacros.clear();
    CurrentModule->UnresolvedConflicts.clear();
    CurrentModule->Conflicts.clear();

    // The module is available unless it's missing a requirement; relevant
    // requirements will be (re-)added by SUBMODULE_REQUIRES records.
    // Missing headers that were present when the module was built do not
    // make it unavailable -- if we got this far, this must be an explicitly
    // imported module file.
    CurrentModule->Requirements.clear();
    CurrentModule->MissingHeaders.clear();
    CurrentModule->IsMissingRequirement =
        ParentModule && ParentModule->IsMissingRequirement;
    CurrentModule->IsAvailable = !CurrentModule->IsMissingRequirement;
    break;
  }

  case SUBMODULE_UMBRELLA_HEADER: {
    std::string Filename = Blob;
    ResolveImportedPath(F, Filename);
    if (auto Umbrella = PP.getFileManager().getFile(Filename)) {
      if (!CurrentModule->getUmbrellaHeader())
        ModMap.setUmbrellaHeader(CurrentModule, *Umbrella, Blob);
      else if (CurrentModule->getUmbrellaHeader().Entry != *Umbrella) {
        if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
          Error("mismatched umbrella headers in submodule");
        return OutOfDate;
      }
    }
    break;
  }

  case SUBMODULE_HEADER:
  case SUBMODULE_EXCLUDED_HEADER:
  case SUBMODULE_PRIVATE_HEADER:
    // We lazily associate headers with their modules via the HeaderInfo table.
    // FIXME: Re-evaluate this section; maybe only store InputFile IDs instead
    // of complete filenames or remove it entirely.
    break;

  case SUBMODULE_TEXTUAL_HEADER:
  case SUBMODULE_PRIVATE_TEXTUAL_HEADER:
    // FIXME: Textual headers are not marked in the HeaderInfo table. Load
    // them here.
    break;

  case SUBMODULE_TOPHEADER:
    CurrentModule->addTopHeaderFilename(Blob);
    break;

  case SUBMODULE_UMBRELLA_DIR: {
    std::string Dirname = Blob;
    ResolveImportedPath(F, Dirname);
    if (auto Umbrella = PP.getFileManager().getDirectory(Dirname)) {
      if (!CurrentModule->getUmbrellaDir())
        ModMap.setUmbrellaDir(CurrentModule, *Umbrella, Blob);
      else if (CurrentModule->getUmbrellaDir().Entry != *Umbrella) {
        if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
          Error("mismatched umbrella directories in submodule");
        return OutOfDate;
      }
    }
    break;
  }

  case SUBMODULE_METADATA: {
    F.BaseSubmoduleID = getTotalNumSubmodules();
    F.LocalNumSubmodules = Record[0];
    unsigned LocalBaseSubmoduleID = Record[1];
    if (F.LocalNumSubmodules > 0) {
      // Introduce the global -> local mapping for submodules within this
      // module.
      GlobalSubmoduleMap.insert(std::make_pair(getTotalNumSubmodules()+1,&F));

      // Introduce the local -> global mapping for submodules within this
      // module.
      F.SubmoduleRemap.insertOrReplace(
        std::make_pair(LocalBaseSubmoduleID,
                       F.BaseSubmoduleID - LocalBaseSubmoduleID));

      SubmodulesLoaded.resize(SubmodulesLoaded.size() + F.LocalNumSubmodules);
    }
    break;
  }

  case SUBMODULE_IMPORTS:
    for (unsigned Idx = 0; Idx != Record.size(); ++Idx) {
      UnresolvedModuleRef Unresolved;
      Unresolved.File = &F;
      Unresolved.Mod = CurrentModule;
      Unresolved.ID = Record[Idx];
      Unresolved.Kind = UnresolvedModuleRef::Import;
      Unresolved.IsWildcard = false;
      UnresolvedModuleRefs.push_back(Unresolved);
    }
    break;

  case SUBMODULE_EXPORTS:
    for (unsigned Idx = 0; Idx + 1 < Record.size(); Idx += 2) {
      UnresolvedModuleRef Unresolved;
      Unresolved.File = &F;
      Unresolved.Mod = CurrentModule;
      Unresolved.ID = Record[Idx];
      Unresolved.Kind = UnresolvedModuleRef::Export;
      Unresolved.IsWildcard = Record[Idx + 1];
      UnresolvedModuleRefs.push_back(Unresolved);
    }

    // Once we've loaded the set of exports, there's no reason to keep
    // the parsed, unresolved exports around.
    CurrentModule->UnresolvedExports.clear();
    break;

  case SUBMODULE_REQUIRES:
    CurrentModule->addRequirement(Blob, Record[0], PP.getLangOpts(),
                                  PP.getTargetInfo());
    break;

  case SUBMODULE_LINK_LIBRARY:
    ModMap.resolveLinkAsDependencies(CurrentModule);
    CurrentModule->LinkLibraries.push_back(
                                       Module::LinkLibrary(Blob, Record[0]));
    break;

  case SUBMODULE_CONFIG_MACRO:
    CurrentModule->ConfigMacros.push_back(Blob.str());
    break;

  case SUBMODULE_CONFLICT: {
    UnresolvedModuleRef Unresolved;
    Unresolved.File = &F;
    Unresolved.Mod = CurrentModule;
    Unresolved.ID = Record[0];
    Unresolved.Kind = UnresolvedModuleRef::Conflict;
    Unresolved.IsWildcard = false;
    Unresolved.String = Blob;
    UnresolvedModuleRefs.push_back(Unresolved);
    break;
  }

  case SUBMODULE_INITIALIZERS: {
    if (!ContextObj)
      break;
    SmallVector<uint32_t, 16> Inits;
    for (auto &ID : Record)
      Inits.push_back(getGlobalDeclID(F, ID));
    ContextObj->addLazyModuleInitializers(CurrentModule, Inits);
    break;
  }

  case SUBMODULE_EXPORT_AS:
    CurrentModule->ExportAsModule = Blob.str();
    ModMap.addLinkAsDependency(CurrentModule);
    break;
  }
}
5603}

5605/// Parse the record that corresponds to a LangOptions data
5606/// structure.
5607///
5608/// This routine parses the language options from the AST file and then gives
5609/// them to the AST listener if one is set.
5610///
5611/// \returns true if the listener deems the file unacceptable, false otherwise.
5612bool ASTReader::ParseLanguageOptions(const RecordData &Record,
                                   bool Complain,
                                   ASTReaderListener &Listener,
                                   bool AllowCompatibleDifferences) {
LangOptions LangOpts;
unsigned Idx = 0;
5618#define LANGOPT(Name, Bits, Default, Description) \
LangOpts.Name = Record[Idx++];
5620#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
LangOpts.set##Name(static_cast<LangOptions::Type>(Record[Idx++]));
5622#include "clang/Basic/LangOptions.def"
5623#define SANITIZER(NAME, ID)                                                    \
LangOpts.Sanitize.set(SanitizerKind::ID, Record[Idx++]);
5625#include "clang/Basic/Sanitizers.def"

for (unsigned N = Record[Idx++]; N; --N)
  LangOpts.ModuleFeatures.push_back(ReadString(Record, Idx));

ObjCRuntime::Kind runtimeKind = (ObjCRuntime::Kind) Record[Idx++];
VersionTuple runtimeVersion = ReadVersionTuple(Record, Idx);
LangOpts.ObjCRuntime = ObjCRuntime(runtimeKind, runtimeVersion);

LangOpts.CurrentModule = ReadString(Record, Idx);

// Comment options.
for (unsigned N = Record[Idx++]; N; --N) {
  LangOpts.CommentOpts.BlockCommandNames.push_back(
    ReadString(Record, Idx));
}
LangOpts.CommentOpts.ParseAllComments = Record[Idx++];

// OpenMP offloading options.
for (unsigned N = Record[Idx++]; N; --N) {
  LangOpts.OMPTargetTriples.push_back(llvm::Triple(ReadString(Record, Idx)));
}

LangOpts.OMPHostIRFile = ReadString(Record, Idx);

return Listener.ReadLanguageOptions(LangOpts, Complain,
                                    AllowCompatibleDifferences);
5652}

5654bool ASTReader::ParseTargetOptions(const RecordData &Record, bool Complain,
                                 ASTReaderListener &Listener,
                                 bool AllowCompatibleDifferences) {
unsigned Idx = 0;
TargetOptions TargetOpts;
TargetOpts.Triple = ReadString(Record, Idx);
TargetOpts.CPU = ReadString(Record, Idx);
TargetOpts.ABI = ReadString(Record, Idx);
for (unsigned N = Record[Idx++]; N; --N) {
  TargetOpts.FeaturesAsWritten.push_back(ReadString(Record, Idx));
}
for (unsigned N = Record[Idx++]; N; --N) {
  TargetOpts.Features.push_back(ReadString(Record, Idx));
}

return Listener.ReadTargetOptions(TargetOpts, Complain,
                                  AllowCompatibleDifferences);
5671}

5673bool ASTReader::ParseDiagnosticOptions(const RecordData &Record, bool Complain,
                                     ASTReaderListener &Listener) {
IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts(new DiagnosticOptions);
unsigned Idx = 0;
5677#define DIAGOPT(Name, Bits, Default) DiagOpts->Name = Record[Idx++];
5678#define ENUM_DIAGOPT(Name, Type, Bits, Default) \
DiagOpts->set##Name(static_cast<Type>(Record[Idx++]));
5680#include "clang/Basic/DiagnosticOptions.def"

for (unsigned N = Record[Idx++]; N; --N)
  DiagOpts->Warnings.push_back(ReadString(Record, Idx));
for (unsigned N = Record[Idx++]; N; --N)
  DiagOpts->Remarks.push_back(ReadString(Record, Idx));

return Listener.ReadDiagnosticOptions(DiagOpts, Complain);
5688}

5690bool ASTReader::ParseFileSystemOptions(const RecordData &Record, bool Complain,
                                     ASTReaderListener &Listener) {
FileSystemOptions FSOpts;
unsigned Idx = 0;
FSOpts.WorkingDir = ReadString(Record, Idx);
return Listener.ReadFileSystemOptions(FSOpts, Complain);
5696}

5698bool ASTReader::ParseHeaderSearchOptions(const RecordData &Record,
                                       bool Complain,
                                       ASTReaderListener &Listener) {
HeaderSearchOptions HSOpts;
unsigned Idx = 0;
HSOpts.Sysroot = ReadString(Record, Idx);

// Include entries.
for (unsigned N = Record[Idx++]; N; --N) {
  std::string Path = ReadString(Record, Idx);
  frontend::IncludeDirGroup Group
    = static_cast<frontend::IncludeDirGroup>(Record[Idx++]);
  bool IsFramework = Record[Idx++];
  bool IgnoreSysRoot = Record[Idx++];
  HSOpts.UserEntries.emplace_back(std::move(Path), Group, IsFramework,
                                  IgnoreSysRoot);
}

// System header prefixes.
for (unsigned N = Record[Idx++]; N; --N) {
  std::string Prefix = ReadString(Record, Idx);
  bool IsSystemHeader = Record[Idx++];
  HSOpts.SystemHeaderPrefixes.emplace_back(std::move(Prefix), IsSystemHeader);
}

HSOpts.ResourceDir = ReadString(Record, Idx);
HSOpts.ModuleCachePath = ReadString(Record, Idx);
HSOpts.ModuleUserBuildPath = ReadString(Record, Idx);
HSOpts.DisableModuleHash = Record[Idx++];
HSOpts.ImplicitModuleMaps = Record[Idx++];
HSOpts.ModuleMapFileHomeIsCwd = Record[Idx++];
HSOpts.UseBuiltinIncludes = Record[Idx++];
HSOpts.UseStandardSystemIncludes = Record[Idx++];
HSOpts.UseStandardCXXIncludes = Record[Idx++];
HSOpts.UseLibcxx = Record[Idx++];
std::string SpecificModuleCachePath = ReadString(Record, Idx);

return Listener.ReadHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
                                        Complain);
5737}

5739bool ASTReader::ParsePreprocessorOptions(const RecordData &Record,
                                       bool Complain,
                                       ASTReaderListener &Listener,
                                       std::string &SuggestedPredefines) {
PreprocessorOptions PPOpts;
unsigned Idx = 0;

// Macro definitions/undefs
for (unsigned N = Record[Idx++]; N; --N) {
  std::string Macro = ReadString(Record, Idx);
  bool IsUndef = Record[Idx++];
  PPOpts.Macros.push_back(std::make_pair(Macro, IsUndef));
}

// Includes
for (unsigned N = Record[Idx++]; N; --N) {
  PPOpts.Includes.push_back(ReadString(Record, Idx));
}

// Macro Includes
for (unsigned N = Record[Idx++]; N; --N) {
  PPOpts.MacroIncludes.push_back(ReadString(Record, Idx));
}

PPOpts.UsePredefines = Record[Idx++];
PPOpts.DetailedRecord = Record[Idx++];
PPOpts.ImplicitPCHInclude = ReadString(Record, Idx);
PPOpts.ObjCXXARCStandardLibrary =
  static_cast<ObjCXXARCStandardLibraryKind>(Record[Idx++]);
SuggestedPredefines.clear();
return Listener.ReadPreprocessorOptions(PPOpts, Complain,
                                        SuggestedPredefines);
5771}

5773std::pair<ModuleFile *, unsigned>
5774ASTReader::getModulePreprocessedEntity(unsigned GlobalIndex) {
GlobalPreprocessedEntityMapType::iterator
I = GlobalPreprocessedEntityMap.find(GlobalIndex);
assert(I != GlobalPreprocessedEntityMap.end() &&((I != GlobalPreprocessedEntityMap.end() && "Corrupted global preprocessed entity map"
) ? static_cast<void> (0) : __assert_fail ("I != GlobalPreprocessedEntityMap.end() && \"Corrupted global preprocessed entity map\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 5778, __PRETTY_FUNCTION__))
       "Corrupted global preprocessed entity map")((I != GlobalPreprocessedEntityMap.end() && "Corrupted global preprocessed entity map"
) ? static_cast<void> (0) : __assert_fail ("I != GlobalPreprocessedEntityMap.end() && \"Corrupted global preprocessed entity map\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 5778, __PRETTY_FUNCTION__));
ModuleFile *M = I->second;
unsigned LocalIndex = GlobalIndex - M->BasePreprocessedEntityID;
return std::make_pair(M, LocalIndex);
5782}

5784llvm::iterator_range<PreprocessingRecord::iterator>
5785ASTReader::getModulePreprocessedEntities(ModuleFile &Mod) const {
if (PreprocessingRecord *PPRec = PP.getPreprocessingRecord())
  return PPRec->getIteratorsForLoadedRange(Mod.BasePreprocessedEntityID,
                                           Mod.NumPreprocessedEntities);

return llvm::make_range(PreprocessingRecord::iterator(),
                        PreprocessingRecord::iterator());
5792}

5794llvm::iterator_range<ASTReader::ModuleDeclIterator>
5795ASTReader::getModuleFileLevelDecls(ModuleFile &Mod) {
return llvm::make_range(
    ModuleDeclIterator(this, &Mod, Mod.FileSortedDecls),
    ModuleDeclIterator(this, &Mod,
                       Mod.FileSortedDecls + Mod.NumFileSortedDecls));
5800}

5802SourceRange ASTReader::ReadSkippedRange(unsigned GlobalIndex) {
auto I = GlobalSkippedRangeMap.find(GlobalIndex);
assert(I != GlobalSkippedRangeMap.end() &&((I != GlobalSkippedRangeMap.end() && "Corrupted global skipped range map"
) ? static_cast<void> (0) : __assert_fail ("I != GlobalSkippedRangeMap.end() && \"Corrupted global skipped range map\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 5805, __PRETTY_FUNCTION__))
  "Corrupted global skipped range map")((I != GlobalSkippedRangeMap.end() && "Corrupted global skipped range map"
) ? static_cast<void> (0) : __assert_fail ("I != GlobalSkippedRangeMap.end() && \"Corrupted global skipped range map\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 5805, __PRETTY_FUNCTION__));
ModuleFile *M = I->second;
unsigned LocalIndex = GlobalIndex - M->BasePreprocessedSkippedRangeID;
assert(LocalIndex < M->NumPreprocessedSkippedRanges)((LocalIndex < M->NumPreprocessedSkippedRanges) ? static_cast
<void> (0) : __assert_fail ("LocalIndex < M->NumPreprocessedSkippedRanges"
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 5808, __PRETTY_FUNCTION__));
PPSkippedRange RawRange = M->PreprocessedSkippedRangeOffsets[LocalIndex];
SourceRange Range(TranslateSourceLocation(*M, RawRange.getBegin()),
                  TranslateSourceLocation(*M, RawRange.getEnd()));
assert(Range.isValid())((Range.isValid()) ? static_cast<void> (0) : __assert_fail
 ("Range.isValid()", "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 5812, __PRETTY_FUNCTION__));
return Range;
5814}

5816PreprocessedEntity *ASTReader::ReadPreprocessedEntity(unsigned Index) {
PreprocessedEntityID PPID = Index+1;
std::pair<ModuleFile *, unsigned> PPInfo = getModulePreprocessedEntity(Index);
ModuleFile &M = *PPInfo.first;
unsigned LocalIndex = PPInfo.second;
const PPEntityOffset &PPOffs = M.PreprocessedEntityOffsets[LocalIndex];

if (!PP.getPreprocessingRecord()) {
  Error("no preprocessing record");
  return nullptr;
}

SavedStreamPosition SavedPosition(M.PreprocessorDetailCursor);
if (llvm::Error Err =
        M.PreprocessorDetailCursor.JumpToBit(PPOffs.BitOffset)) {
  Error(std::move(Err));
  return nullptr;
}

Expected<llvm::BitstreamEntry> MaybeEntry =
    M.PreprocessorDetailCursor.advance(BitstreamCursor::AF_DontPopBlockAtEnd);
if (!MaybeEntry) {
  Error(MaybeEntry.takeError());
  return nullptr;
}
llvm::BitstreamEntry Entry = MaybeEntry.get();

if (Entry.Kind != llvm::BitstreamEntry::Record)
  return nullptr;

// Read the record.
SourceRange Range(TranslateSourceLocation(M, PPOffs.getBegin()),
                  TranslateSourceLocation(M, PPOffs.getEnd()));
PreprocessingRecord &PPRec = *PP.getPreprocessingRecord();
StringRef Blob;
RecordData Record;
Expected<unsigned> MaybeRecType =
    M.PreprocessorDetailCursor.readRecord(Entry.ID, Record, &Blob);
if (!MaybeRecType) {
  Error(MaybeRecType.takeError());
  return nullptr;
}
switch ((PreprocessorDetailRecordTypes)MaybeRecType.get()) {
case PPD_MACRO_EXPANSION: {
  bool isBuiltin = Record[0];
  IdentifierInfo *Name = nullptr;
  MacroDefinitionRecord *Def = nullptr;
  if (isBuiltin)
    Name = getLocalIdentifier(M, Record[1]);
  else {
    PreprocessedEntityID GlobalID =
        getGlobalPreprocessedEntityID(M, Record[1]);
    Def = cast<MacroDefinitionRecord>(
        PPRec.getLoadedPreprocessedEntity(GlobalID - 1));
  }

  MacroExpansion *ME;
  if (isBuiltin)
    ME = new (PPRec) MacroExpansion(Name, Range);
  else
    ME = new (PPRec) MacroExpansion(Def, Range);

  return ME;
}

case PPD_MACRO_DEFINITION: {
  // Decode the identifier info and then check again; if the macro is
  // still defined and associated with the identifier,
  IdentifierInfo *II = getLocalIdentifier(M, Record[0]);
  MacroDefinitionRecord *MD = new (PPRec) MacroDefinitionRecord(II, Range);

  if (DeserializationListener)
    DeserializationListener->MacroDefinitionRead(PPID, MD);

  return MD;
}

case PPD_INCLUSION_DIRECTIVE: {
  const char *FullFileNameStart = Blob.data() + Record[0];
  StringRef FullFileName(FullFileNameStart, Blob.size() - Record[0]);
  const FileEntry *File = nullptr;
  if (!FullFileName.empty())
    if (auto FE = PP.getFileManager().getFile(FullFileName))
      File = *FE;

  // FIXME: Stable encoding
  InclusionDirective::InclusionKind Kind
    = static_cast<InclusionDirective::InclusionKind>(Record[2]);
  InclusionDirective *ID
    = new (PPRec) InclusionDirective(PPRec, Kind,
                                     StringRef(Blob.data(), Record[0]),
                                     Record[1], Record[3],
                                     File,
                                     Range);
  return ID;
}
}

llvm_unreachable("Invalid PreprocessorDetailRecordTypes")::llvm::llvm_unreachable_internal("Invalid PreprocessorDetailRecordTypes"
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 5914);
5915}

5917/// Find the next module that contains entities and return the ID
5918/// of the first entry.
5919///
5920/// \param SLocMapI points at a chunk of a module that contains no
5921/// preprocessed entities or the entities it contains are not the ones we are
5922/// looking for.
5923PreprocessedEntityID ASTReader::findNextPreprocessedEntity(
                     GlobalSLocOffsetMapType::const_iterator SLocMapI) const {
++SLocMapI;
for (GlobalSLocOffsetMapType::const_iterator
       EndI = GlobalSLocOffsetMap.end(); SLocMapI != EndI; ++SLocMapI) {
  ModuleFile &M = *SLocMapI->second;
  if (M.NumPreprocessedEntities)
    return M.BasePreprocessedEntityID;
}

return getTotalNumPreprocessedEntities();
5934}

5936namespace {

5938struct PPEntityComp {
const ASTReader &Reader;
ModuleFile &M;

PPEntityComp(const ASTReader &Reader, ModuleFile &M) : Reader(Reader), M(M) {}

bool operator()(const PPEntityOffset &L, const PPEntityOffset &R) const {
  SourceLocation LHS = getLoc(L);
  SourceLocation RHS = getLoc(R);
  return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
}

bool operator()(const PPEntityOffset &L, SourceLocation RHS) const {
  SourceLocation LHS = getLoc(L);
  return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
}

bool operator()(SourceLocation LHS, const PPEntityOffset &R) const {
  SourceLocation RHS = getLoc(R);
  return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
}

SourceLocation getLoc(const PPEntityOffset &PPE) const {
  return Reader.TranslateSourceLocation(M, PPE.getBegin());
}
5963};

5965} // namespace

5967PreprocessedEntityID ASTReader::findPreprocessedEntity(SourceLocation Loc,
                                                     bool EndsAfter) const {
if (SourceMgr.isLocalSourceLocation(Loc))
  return getTotalNumPreprocessedEntities();

GlobalSLocOffsetMapType::const_iterator SLocMapI = GlobalSLocOffsetMap.find(
    SourceManager::MaxLoadedOffset - Loc.getOffset() - 1);
assert(SLocMapI != GlobalSLocOffsetMap.end() &&((SLocMapI != GlobalSLocOffsetMap.end() && "Corrupted global sloc offset map"
) ? static_cast<void> (0) : __assert_fail ("SLocMapI != GlobalSLocOffsetMap.end() && \"Corrupted global sloc offset map\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 5975, __PRETTY_FUNCTION__))
       "Corrupted global sloc offset map")((SLocMapI != GlobalSLocOffsetMap.end() && "Corrupted global sloc offset map"
) ? static_cast<void> (0) : __assert_fail ("SLocMapI != GlobalSLocOffsetMap.end() && \"Corrupted global sloc offset map\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 5975, __PRETTY_FUNCTION__));

if (SLocMapI->second->NumPreprocessedEntities == 0)
  return findNextPreprocessedEntity(SLocMapI);

ModuleFile &M = *SLocMapI->second;

using pp_iterator = const PPEntityOffset *;

pp_iterator pp_begin = M.PreprocessedEntityOffsets;
pp_iterator pp_end = pp_begin + M.NumPreprocessedEntities;

size_t Count = M.NumPreprocessedEntities;
size_t Half;
pp_iterator First = pp_begin;
pp_iterator PPI;

if (EndsAfter) {
  PPI = std::upper_bound(pp_begin, pp_end, Loc,
                         PPEntityComp(*this, M));
} else {
  // Do a binary search manually instead of using std::lower_bound because
  // The end locations of entities may be unordered (when a macro expansion
  // is inside another macro argument), but for this case it is not important
  // whether we get the first macro expansion or its containing macro.
  while (Count > 0) {
    Half = Count / 2;
    PPI = First;
    std::advance(PPI, Half);
    if (SourceMgr.isBeforeInTranslationUnit(
            TranslateSourceLocation(M, PPI->getEnd()), Loc)) {
      First = PPI;
      ++First;
      Count = Count - Half - 1;
    } else
      Count = Half;
  }
}

if (PPI == pp_end)
  return findNextPreprocessedEntity(SLocMapI);

return M.BasePreprocessedEntityID + (PPI - pp_begin);
6018}

6020/// Returns a pair of [Begin, End) indices of preallocated
6021/// preprocessed entities that \arg Range encompasses.
6022std::pair<unsigned, unsigned>
  ASTReader::findPreprocessedEntitiesInRange(SourceRange Range) {
if (Range.isInvalid())
  return std::make_pair(0,0);
assert(!SourceMgr.isBeforeInTranslationUnit(Range.getEnd(),Range.getBegin()))((!SourceMgr.isBeforeInTranslationUnit(Range.getEnd(),Range.getBegin
())) ? static_cast<void> (0) : __assert_fail ("!SourceMgr.isBeforeInTranslationUnit(Range.getEnd(),Range.getBegin())"
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 6026, __PRETTY_FUNCTION__));

PreprocessedEntityID BeginID =
    findPreprocessedEntity(Range.getBegin(), false);
PreprocessedEntityID EndID = findPreprocessedEntity(Range.getEnd(), true);
return std::make_pair(BeginID, EndID);
6032}

6034/// Optionally returns true or false if the preallocated preprocessed
6035/// entity with index \arg Index came from file \arg FID.
6036Optional<bool> ASTReader::isPreprocessedEntityInFileID(unsigned Index,
                                                           FileID FID) {
if (FID.isInvalid())
  return false;

std::pair<ModuleFile *, unsigned> PPInfo = getModulePreprocessedEntity(Index);
ModuleFile &M = *PPInfo.first;
unsigned LocalIndex = PPInfo.second;
const PPEntityOffset &PPOffs = M.PreprocessedEntityOffsets[LocalIndex];

SourceLocation Loc = TranslateSourceLocation(M, PPOffs.getBegin());
if (Loc.isInvalid())
  return false;

if (SourceMgr.isInFileID(SourceMgr.getFileLoc(Loc), FID))
  return true;
else
  return false;
6054}

6056namespace {

/// Visitor used to search for information about a header file.
class HeaderFileInfoVisitor {
  const FileEntry *FE;
  Optional<HeaderFileInfo> HFI;

public:
  explicit HeaderFileInfoVisitor(const FileEntry *FE) : FE(FE) {}

  bool operator()(ModuleFile &M) {
    HeaderFileInfoLookupTable *Table
      = static_cast<HeaderFileInfoLookupTable *>(M.HeaderFileInfoTable);
    if (!Table)
      return false;

    // Look in the on-disk hash table for an entry for this file name.
    HeaderFileInfoLookupTable::iterator Pos = Table->find(FE);
    if (Pos == Table->end())
      return false;

    HFI = *Pos;
    return true;
  }

  Optional<HeaderFileInfo> getHeaderFileInfo() const { return HFI; }
};

6084} // namespace

6086HeaderFileInfo ASTReader::GetHeaderFileInfo(const FileEntry *FE) {
HeaderFileInfoVisitor Visitor(FE);
ModuleMgr.visit(Visitor);
if (Optional<HeaderFileInfo> HFI = Visitor.getHeaderFileInfo())
  return *HFI;

return HeaderFileInfo();
6093}

6095void ASTReader::ReadPragmaDiagnosticMappings(DiagnosticsEngine &Diag) {
using DiagState = DiagnosticsEngine::DiagState;
SmallVector<DiagState *, 32> DiagStates;

for (ModuleFile &F : ModuleMgr) {
  unsigned Idx = 0;
  auto &Record = F.PragmaDiagMappings;
  if (Record.empty())
    continue;

  DiagStates.clear();

  auto ReadDiagState =
      [&](const DiagState &BasedOn, SourceLocation Loc,
          bool IncludeNonPragmaStates) -> DiagnosticsEngine::DiagState * {
    unsigned BackrefID = Record[Idx++];
    if (BackrefID != 0)
      return DiagStates[BackrefID - 1];

    // A new DiagState was created here.
    Diag.DiagStates.push_back(BasedOn);
    DiagState *NewState = &Diag.DiagStates.back();
    DiagStates.push_back(NewState);
    unsigned Size = Record[Idx++];
    assert(Idx + Size * 2 <= Record.size() &&((Idx + Size * 2 <= Record.size() && "Invalid data, not enough diag/map pairs"
) ? static_cast<void> (0) : __assert_fail ("Idx + Size * 2 <= Record.size() && \"Invalid data, not enough diag/map pairs\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 6120, __PRETTY_FUNCTION__))
           "Invalid data, not enough diag/map pairs")((Idx + Size * 2 <= Record.size() && "Invalid data, not enough diag/map pairs"
) ? static_cast<void> (0) : __assert_fail ("Idx + Size * 2 <= Record.size() && \"Invalid data, not enough diag/map pairs\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 6120, __PRETTY_FUNCTION__));
    while (Size--) {
      unsigned DiagID = Record[Idx++];
      DiagnosticMapping NewMapping =
          DiagnosticMapping::deserialize(Record[Idx++]);
      if (!NewMapping.isPragma() && !IncludeNonPragmaStates)
        continue;

      DiagnosticMapping &Mapping = NewState->getOrAddMapping(DiagID);

      // If this mapping was specified as a warning but the severity was
      // upgraded due to diagnostic settings, simulate the current diagnostic
      // settings (and use a warning).
      if (NewMapping.wasUpgradedFromWarning() && !Mapping.isErrorOrFatal()) {
        NewMapping.setSeverity(diag::Severity::Warning);
        NewMapping.setUpgradedFromWarning(false);
      }

      Mapping = NewMapping;
    }
    return NewState;
  };

  // Read the first state.
  DiagState *FirstState;
  if (F.Kind == MK_ImplicitModule) {
    // Implicitly-built modules are reused with different diagnostic
    // settings.  Use the initial diagnostic state from Diag to simulate this
    // compilation's diagnostic settings.
    FirstState = Diag.DiagStatesByLoc.FirstDiagState;
    DiagStates.push_back(FirstState);

    // Skip the initial diagnostic state from the serialized module.
    assert(Record[1] == 0 &&((Record[1] == 0 && "Invalid data, unexpected backref in initial state"
) ? static_cast<void> (0) : __assert_fail ("Record[1] == 0 && \"Invalid data, unexpected backref in initial state\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 6154, __PRETTY_FUNCTION__))
           "Invalid data, unexpected backref in initial state")((Record[1] == 0 && "Invalid data, unexpected backref in initial state"
) ? static_cast<void> (0) : __assert_fail ("Record[1] == 0 && \"Invalid data, unexpected backref in initial state\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 6154, __PRETTY_FUNCTION__));
    Idx = 3 + Record[2] * 2;
    assert(Idx < Record.size() &&((Idx < Record.size() && "Invalid data, not enough state change pairs in initial state"
) ? static_cast<void> (0) : __assert_fail ("Idx < Record.size() && \"Invalid data, not enough state change pairs in initial state\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 6157, __PRETTY_FUNCTION__))
           "Invalid data, not enough state change pairs in initial state")((Idx < Record.size() && "Invalid data, not enough state change pairs in initial state"
) ? static_cast<void> (0) : __assert_fail ("Idx < Record.size() && \"Invalid data, not enough state change pairs in initial state\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 6157, __PRETTY_FUNCTION__));
  } else if (F.isModule()) {
    // For an explicit module, preserve the flags from the module build
    // command line (-w, -Weverything, -Werror, ...) along with any explicit
    // -Wblah flags.
    unsigned Flags = Record[Idx++];
    DiagState Initial;
    Initial.SuppressSystemWarnings = Flags & 1; Flags >>= 1;
    Initial.ErrorsAsFatal = Flags & 1; Flags >>= 1;
    Initial.WarningsAsErrors = Flags & 1; Flags >>= 1;
    Initial.EnableAllWarnings = Flags & 1; Flags >>= 1;
    Initial.IgnoreAllWarnings = Flags & 1; Flags >>= 1;
    Initial.ExtBehavior = (diag::Severity)Flags;
    FirstState = ReadDiagState(Initial, SourceLocation(), true);

    assert(F.OriginalSourceFileID.isValid())((F.OriginalSourceFileID.isValid()) ? static_cast<void>
 (0) : __assert_fail ("F.OriginalSourceFileID.isValid()", "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 6172, __PRETTY_FUNCTION__));

    // Set up the root buffer of the module to start with the initial
    // diagnostic state of the module itself, to cover files that contain no
    // explicit transitions (for which we did not serialize anything).
    Diag.DiagStatesByLoc.Files[F.OriginalSourceFileID]
        .StateTransitions.push_back({FirstState, 0});
  } else {
    // For prefix ASTs, start with whatever the user configured on the
    // command line.
    Idx++; // Skip flags.
    FirstState = ReadDiagState(*Diag.DiagStatesByLoc.CurDiagState,
                               SourceLocation(), false);
  }

  // Read the state transitions.
  unsigned NumLocations = Record[Idx++];
  while (NumLocations--) {
    assert(Idx < Record.size() &&((Idx < Record.size() && "Invalid data, missing pragma diagnostic states"
) ? static_cast<void> (0) : __assert_fail ("Idx < Record.size() && \"Invalid data, missing pragma diagnostic states\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 6191, __PRETTY_FUNCTION__))
           "Invalid data, missing pragma diagnostic states")((Idx < Record.size() && "Invalid data, missing pragma diagnostic states"
) ? static_cast<void> (0) : __assert_fail ("Idx < Record.size() && \"Invalid data, missing pragma diagnostic states\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 6191, __PRETTY_FUNCTION__));
    SourceLocation Loc = ReadSourceLocation(F, Record[Idx++]);
    auto IDAndOffset = SourceMgr.getDecomposedLoc(Loc);
    assert(IDAndOffset.first.isValid() && "invalid FileID for transition")((IDAndOffset.first.isValid() && "invalid FileID for transition"
) ? static_cast<void> (0) : __assert_fail ("IDAndOffset.first.isValid() && \"invalid FileID for transition\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 6194, __PRETTY_FUNCTION__));
    assert(IDAndOffset.second == 0 && "not a start location for a FileID")((IDAndOffset.second == 0 && "not a start location for a FileID"
) ? static_cast<void> (0) : __assert_fail ("IDAndOffset.second == 0 && \"not a start location for a FileID\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 6195, __PRETTY_FUNCTION__));
    unsigned Transitions = Record[Idx++];

    // Note that we don't need to set up Parent/ParentOffset here, because
    // we won't be changing the diagnostic state within imported FileIDs
    // (other than perhaps appending to the main source file, which has no
    // parent).
    auto &F = Diag.DiagStatesByLoc.Files[IDAndOffset.first];
    F.StateTransitions.reserve(F.StateTransitions.size() + Transitions);
    for (unsigned I = 0; I != Transitions; ++I) {
      unsigned Offset = Record[Idx++];
      auto *State =
          ReadDiagState(*FirstState, Loc.getLocWithOffset(Offset), false);
      F.StateTransitions.push_back({State, Offset});
    }
  }

  // Read the final state.
  assert(Idx < Record.size() &&((Idx < Record.size() && "Invalid data, missing final pragma diagnostic state"
) ? static_cast<void> (0) : __assert_fail ("Idx < Record.size() && \"Invalid data, missing final pragma diagnostic state\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 6214, __PRETTY_FUNCTION__))
         "Invalid data, missing final pragma diagnostic state")((Idx < Record.size() && "Invalid data, missing final pragma diagnostic state"
) ? static_cast<void> (0) : __assert_fail ("Idx < Record.size() && \"Invalid data, missing final pragma diagnostic state\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 6214, __PRETTY_FUNCTION__));
  SourceLocation CurStateLoc =
      ReadSourceLocation(F, F.PragmaDiagMappings[Idx++]);
  auto *CurState = ReadDiagState(*FirstState, CurStateLoc, false);

  if (!F.isModule()) {
    Diag.DiagStatesByLoc.CurDiagState = CurState;
    Diag.DiagStatesByLoc.CurDiagStateLoc = CurStateLoc;

    // Preserve the property that the imaginary root file describes the
    // current state.
    FileID NullFile;
    auto &T = Diag.DiagStatesByLoc.Files[NullFile].StateTransitions;
    if (T.empty())
      T.push_back({CurState, 0});
    else
      T[0].State = CurState;
  }

  // Don't try to read these mappings again.
  Record.clear();
}
6236}

6238/// Get the correct cursor and offset for loading a type.
6239ASTReader::RecordLocation ASTReader::TypeCursorForIndex(unsigned Index) {
GlobalTypeMapType::iterator I = GlobalTypeMap.find(Index);
assert(I != GlobalTypeMap.end() && "Corrupted global type map")((I != GlobalTypeMap.end() && "Corrupted global type map"
) ? static_cast<void> (0) : __assert_fail ("I != GlobalTypeMap.end() && \"Corrupted global type map\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 6241, __PRETTY_FUNCTION__));
ModuleFile *M = I->second;
return RecordLocation(M, M->TypeOffsets[Index - M->BaseTypeIndex]);
6244}

6246/// Read and return the type with the given index..
6247///
6248/// The index is the type ID, shifted and minus the number of predefs. This
6249/// routine actually reads the record corresponding to the type at the given
6250/// location. It is a helper routine for GetType, which deals with reading type
6251/// IDs.
6252QualType ASTReader::readTypeRecord(unsigned Index) {
assert(ContextObj && "reading type with no AST context")((ContextObj && "reading type with no AST context") ?
 static_cast<void> (0) : __assert_fail ("ContextObj && \"reading type with no AST context\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 6253, __PRETTY_FUNCTION__));
ASTContext &Context = *ContextObj;
RecordLocation Loc = TypeCursorForIndex(Index);
BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;

// Keep track of where we are in the stream, then jump back there
// after reading this type.
SavedStreamPosition SavedPosition(DeclsCursor);

ReadingKindTracker ReadingKind(Read_Type, *this);

// Note that we are loading a type record.
Deserializing AType(this);

unsigned Idx = 0;
if (llvm::Error Err = DeclsCursor.JumpToBit(Loc.Offset)) {
  Error(std::move(Err));
  return QualType();
}
RecordData Record;
Expected<unsigned> MaybeCode = DeclsCursor.ReadCode();
if (!MaybeCode) {
  Error(MaybeCode.takeError());
  return QualType();
}
unsigned Code = MaybeCode.get();

Expected<unsigned> MaybeTypeCode = DeclsCursor.readRecord(Code, Record);
if (!MaybeTypeCode) {
  Error(MaybeTypeCode.takeError());
  return QualType();
}
switch ((TypeCode)MaybeTypeCode.get()) {
case TYPE_EXT_QUAL: {
  if (Record.size() != 2) {
    Error("Incorrect encoding of extended qualifier type");
    return QualType();
  }
  QualType Base = readType(*Loc.F, Record, Idx);
  Qualifiers Quals = Qualifiers::fromOpaqueValue(Record[Idx++]);
  return Context.getQualifiedType(Base, Quals);
}

case TYPE_COMPLEX: {
  if (Record.size() != 1) {
    Error("Incorrect encoding of complex type");
    return QualType();
  }
  QualType ElemType = readType(*Loc.F, Record, Idx);
  return Context.getComplexType(ElemType);
}

case TYPE_POINTER: {
  if (Record.size() != 1) {
    Error("Incorrect encoding of pointer type");
    return QualType();
  }
  QualType PointeeType = readType(*Loc.F, Record, Idx);
  return Context.getPointerType(PointeeType);
}

case TYPE_DECAYED: {
  if (Record.size() != 1) {
    Error("Incorrect encoding of decayed type");
    return QualType();
  }
  QualType OriginalType = readType(*Loc.F, Record, Idx);
  QualType DT = Context.getAdjustedParameterType(OriginalType);
  if (!isa<DecayedType>(DT))
    Error("Decayed type does not decay");
  return DT;
}

case TYPE_ADJUSTED: {
  if (Record.size() != 2) {
    Error("Incorrect encoding of adjusted type");
    return QualType();
  }
  QualType OriginalTy = readType(*Loc.F, Record, Idx);
  QualType AdjustedTy = readType(*Loc.F, Record, Idx);
  return Context.getAdjustedType(OriginalTy, AdjustedTy);
}

case TYPE_BLOCK_POINTER: {
  if (Record.size() != 1) {
    Error("Incorrect encoding of block pointer type");
    return QualType();
  }
  QualType PointeeType = readType(*Loc.F, Record, Idx);
  return Context.getBlockPointerType(PointeeType);
}

case TYPE_LVALUE_REFERENCE: {
  if (Record.size() != 2) {
    Error("Incorrect encoding of lvalue reference type");
    return QualType();
  }
  QualType PointeeType = readType(*Loc.F, Record, Idx);
  return Context.getLValueReferenceType(PointeeType, Record[1]);
}

case TYPE_RVALUE_REFERENCE: {
  if (Record.size() != 1) {
    Error("Incorrect encoding of rvalue reference type");
    return QualType();
  }
  QualType PointeeType = readType(*Loc.F, Record, Idx);
  return Context.getRValueReferenceType(PointeeType);
}

case TYPE_MEMBER_POINTER: {
  if (Record.size() != 2) {
    Error("Incorrect encoding of member pointer type");
    return QualType();
  }
  QualType PointeeType = readType(*Loc.F, Record, Idx);
  QualType ClassType = readType(*Loc.F, Record, Idx);
  if (PointeeType.isNull() || ClassType.isNull())
    return QualType();

  return Context.getMemberPointerType(PointeeType, ClassType.getTypePtr());
}

case TYPE_CONSTANT_ARRAY: {
  QualType ElementType = readType(*Loc.F, Record, Idx);
  ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
  unsigned IndexTypeQuals = Record[2];
  unsigned Idx = 3;
  llvm::APInt Size = ReadAPInt(Record, Idx);
  return Context.getConstantArrayType(ElementType, Size,
                                       ASM, IndexTypeQuals);
}

case TYPE_INCOMPLETE_ARRAY: {
  QualType ElementType = readType(*Loc.F, Record, Idx);
  ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
  unsigned IndexTypeQuals = Record[2];
  return Context.getIncompleteArrayType(ElementType, ASM, IndexTypeQuals);
}

case TYPE_VARIABLE_ARRAY: {
  QualType ElementType = readType(*Loc.F, Record, Idx);
  ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
  unsigned IndexTypeQuals = Record[2];
  SourceLocation LBLoc = ReadSourceLocation(*Loc.F, Record[3]);
  SourceLocation RBLoc = ReadSourceLocation(*Loc.F, Record[4]);
  return Context.getVariableArrayType(ElementType, ReadExpr(*Loc.F),
                                       ASM, IndexTypeQuals,
                                       SourceRange(LBLoc, RBLoc));
}

case TYPE_VECTOR: {
  if (Record.size() != 3) {
    Error("incorrect encoding of vector type in AST file");
    return QualType();
  }

  QualType ElementType = readType(*Loc.F, Record, Idx);
  unsigned NumElements = Record[1];
  unsigned VecKind = Record[2];
  return Context.getVectorType(ElementType, NumElements,
                                (VectorType::VectorKind)VecKind);
}

case TYPE_EXT_VECTOR: {
  if (Record.size() != 3) {
    Error("incorrect encoding of extended vector type in AST file");
    return QualType();
  }

  QualType ElementType = readType(*Loc.F, Record, Idx);
  unsigned NumElements = Record[1];
  return Context.getExtVectorType(ElementType, NumElements);
}

case TYPE_FUNCTION_NO_PROTO: {
  if (Record.size() != 8) {
    Error("incorrect encoding of no-proto function type");
    return QualType();
  }
  QualType ResultType = readType(*Loc.F, Record, Idx);
  FunctionType::ExtInfo Info(Record[1], Record[2], Record[3],
                             (CallingConv)Record[4], Record[5], Record[6],
                             Record[7]);
  return Context.getFunctionNoProtoType(ResultType, Info);
}

case TYPE_FUNCTION_PROTO: {
  QualType ResultType = readType(*Loc.F, Record, Idx);

  FunctionProtoType::ExtProtoInfo EPI;
  EPI.ExtInfo = FunctionType::ExtInfo(/*noreturn*/ Record[1],
                                      /*hasregparm*/ Record[2],
                                      /*regparm*/ Record[3],
                                      static_cast<CallingConv>(Record[4]),
                                      /*produces*/ Record[5],
                                      /*nocallersavedregs*/ Record[6],
                                      /*nocfcheck*/ Record[7]);

  unsigned Idx = 8;

  EPI.Variadic = Record[Idx++];
  EPI.HasTrailingReturn = Record[Idx++];
  EPI.TypeQuals = Qualifiers::fromOpaqueValue(Record[Idx++]);
  EPI.RefQualifier = static_cast<RefQualifierKind>(Record[Idx++]);
  SmallVector<QualType, 8> ExceptionStorage;
  readExceptionSpec(*Loc.F, ExceptionStorage, EPI.ExceptionSpec, Record, Idx);

  unsigned NumParams = Record[Idx++];
  SmallVector<QualType, 16> ParamTypes;
  for (unsigned I = 0; I != NumParams; ++I)
    ParamTypes.push_back(readType(*Loc.F, Record, Idx));

  SmallVector<FunctionProtoType::ExtParameterInfo, 4> ExtParameterInfos;
  if (Idx != Record.size()) {
    for (unsigned I = 0; I != NumParams; ++I)
      ExtParameterInfos.push_back(
        FunctionProtoType::ExtParameterInfo
                         ::getFromOpaqueValue(Record[Idx++]));
    EPI.ExtParameterInfos = ExtParameterInfos.data();
  }

  assert(Idx == Record.size())((Idx == Record.size()) ? static_cast<void> (0) : __assert_fail
 ("Idx == Record.size()", "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 6475, __PRETTY_FUNCTION__));

  return Context.getFunctionType(ResultType, ParamTypes, EPI);
}

case TYPE_UNRESOLVED_USING: {
  unsigned Idx = 0;
  return Context.getTypeDeclType(
                ReadDeclAs<UnresolvedUsingTypenameDecl>(*Loc.F, Record, Idx));
}

case TYPE_TYPEDEF: {
  if (Record.size() != 2) {
    Error("incorrect encoding of typedef type");
    return QualType();
  }
  unsigned Idx = 0;
  TypedefNameDecl *Decl = ReadDeclAs<TypedefNameDecl>(*Loc.F, Record, Idx);
  QualType Canonical = readType(*Loc.F, Record, Idx);
  if (!Canonical.isNull())
    Canonical = Context.getCanonicalType(Canonical);
  return Context.getTypedefType(Decl, Canonical);
}

case TYPE_TYPEOF_EXPR:
  return Context.getTypeOfExprType(ReadExpr(*Loc.F));

case TYPE_TYPEOF: {
  if (Record.size() != 1) {
    Error("incorrect encoding of typeof(type) in AST file");
    return QualType();
  }
  QualType UnderlyingType = readType(*Loc.F, Record, Idx);
  return Context.getTypeOfType(UnderlyingType);
}

case TYPE_DECLTYPE: {
  QualType UnderlyingType = readType(*Loc.F, Record, Idx);
  return Context.getDecltypeType(ReadExpr(*Loc.F), UnderlyingType);
}

case TYPE_UNARY_TRANSFORM: {
  QualType BaseType = readType(*Loc.F, Record, Idx);
  QualType UnderlyingType = readType(*Loc.F, Record, Idx);
  UnaryTransformType::UTTKind UKind = (UnaryTransformType::UTTKind)Record[2];
  return Context.getUnaryTransformType(BaseType, UnderlyingType, UKind);
}

case TYPE_AUTO: {
  QualType Deduced = readType(*Loc.F, Record, Idx);
  AutoTypeKeyword Keyword = (AutoTypeKeyword)Record[Idx++];
  bool IsDependent = false, IsPack = false;
  if (Deduced.isNull()) {
    IsDependent = Record[Idx] > 0;
    IsPack = Record[Idx] > 1;
    ++Idx;
  }
  return Context.getAutoType(Deduced, Keyword, IsDependent, IsPack);
}

case TYPE_DEDUCED_TEMPLATE_SPECIALIZATION: {
  TemplateName Name = ReadTemplateName(*Loc.F, Record, Idx);
  QualType Deduced = readType(*Loc.F, Record, Idx);
  bool IsDependent = Deduced.isNull() ? Record[Idx++] : false;
  return Context.getDeducedTemplateSpecializationType(Name, Deduced,
                                                      IsDependent);
}

case TYPE_RECORD: {
  if (Record.size() != 2) {
    Error("incorrect encoding of record type");
    return QualType();
  }
  unsigned Idx = 0;
  bool IsDependent = Record[Idx++];
  RecordDecl *RD = ReadDeclAs<RecordDecl>(*Loc.F, Record, Idx);
  RD = cast_or_null<RecordDecl>(RD->getCanonicalDecl());
  QualType T = Context.getRecordType(RD);
  const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent);
  return T;
}

case TYPE_ENUM: {
  if (Record.size() != 2) {
    Error("incorrect encoding of enum type");
    return QualType();
  }
  unsigned Idx = 0;
  bool IsDependent = Record[Idx++];
  QualType T
    = Context.getEnumType(ReadDeclAs<EnumDecl>(*Loc.F, Record, Idx));
  const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent);
  return T;
}

case TYPE_ATTRIBUTED: {
  if (Record.size() != 3) {
    Error("incorrect encoding of attributed type");
    return QualType();
  }
  QualType modifiedType = readType(*Loc.F, Record, Idx);
  QualType equivalentType = readType(*Loc.F, Record, Idx);
  AttributedType::Kind kind = static_cast<AttributedType::Kind>(Record[2]);
  return Context.getAttributedType(kind, modifiedType, equivalentType);
}

case TYPE_PAREN: {
  if (Record.size() != 1) {
    Error("incorrect encoding of paren type");
    return QualType();
  }
  QualType InnerType = readType(*Loc.F, Record, Idx);
  return Context.getParenType(InnerType);
}

case TYPE_MACRO_QUALIFIED: {
  if (Record.size() != 2) {
    Error("incorrect encoding of macro defined type");
    return QualType();
  }
  QualType UnderlyingTy = readType(*Loc.F, Record, Idx);
  IdentifierInfo *MacroII = GetIdentifierInfo(*Loc.F, Record, Idx);
  return Context.getMacroQualifiedType(UnderlyingTy, MacroII);
}

case TYPE_PACK_EXPANSION: {
  if (Record.size() != 2) {
    Error("incorrect encoding of pack expansion type");
    return QualType();
  }
  QualType Pattern = readType(*Loc.F, Record, Idx);
  if (Pattern.isNull())
    return QualType();
  Optional<unsigned> NumExpansions;
  if (Record[1])
    NumExpansions = Record[1] - 1;
  return Context.getPackExpansionType(Pattern, NumExpansions);
}

case TYPE_ELABORATED: {
  unsigned Idx = 0;
  ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++];
  NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx);
  QualType NamedType = readType(*Loc.F, Record, Idx);
  TagDecl *OwnedTagDecl = ReadDeclAs<TagDecl>(*Loc.F, Record, Idx);
  return Context.getElaboratedType(Keyword, NNS, NamedType, OwnedTagDecl);
}

case TYPE_OBJC_INTERFACE: {
  unsigned Idx = 0;
  ObjCInterfaceDecl *ItfD
    = ReadDeclAs<ObjCInterfaceDecl>(*Loc.F, Record, Idx);
  return Context.getObjCInterfaceType(ItfD->getCanonicalDecl());
}

case TYPE_OBJC_TYPE_PARAM: {
  unsigned Idx = 0;
  ObjCTypeParamDecl *Decl
    = ReadDeclAs<ObjCTypeParamDecl>(*Loc.F, Record, Idx);
  unsigned NumProtos = Record[Idx++];
  SmallVector<ObjCProtocolDecl*, 4> Protos;
  for (unsigned I = 0; I != NumProtos; ++I)
    Protos.push_back(ReadDeclAs<ObjCProtocolDecl>(*Loc.F, Record, Idx));
  return Context.getObjCTypeParamType(Decl, Protos);
}

case TYPE_OBJC_OBJECT: {
  unsigned Idx = 0;
  QualType Base = readType(*Loc.F, Record, Idx);
  unsigned NumTypeArgs = Record[Idx++];
  SmallVector<QualType, 4> TypeArgs;
  for (unsigned I = 0; I != NumTypeArgs; ++I)
    TypeArgs.push_back(readType(*Loc.F, Record, Idx));
  unsigned NumProtos = Record[Idx++];
  SmallVector<ObjCProtocolDecl*, 4> Protos;
  for (unsigned I = 0; I != NumProtos; ++I)
    Protos.push_back(ReadDeclAs<ObjCProtocolDecl>(*Loc.F, Record, Idx));
  bool IsKindOf = Record[Idx++];
  return Context.getObjCObjectType(Base, TypeArgs, Protos, IsKindOf);
}

case TYPE_OBJC_OBJECT_POINTER: {
  unsigned Idx = 0;
  QualType Pointee = readType(*Loc.F, Record, Idx);
  return Context.getObjCObjectPointerType(Pointee);
}

case TYPE_SUBST_TEMPLATE_TYPE_PARM: {
  unsigned Idx = 0;
  QualType Parm = readType(*Loc.F, Record, Idx);
  QualType Replacement = readType(*Loc.F, Record, Idx);
  return Context.getSubstTemplateTypeParmType(
      cast<TemplateTypeParmType>(Parm),
      Context.getCanonicalType(Replacement));
}

case TYPE_SUBST_TEMPLATE_TYPE_PARM_PACK: {
  unsigned Idx = 0;
  QualType Parm = readType(*Loc.F, Record, Idx);
  TemplateArgument ArgPack = ReadTemplateArgument(*Loc.F, Record, Idx);
  return Context.getSubstTemplateTypeParmPackType(
                                             cast<TemplateTypeParmType>(Parm),
                                                   ArgPack);
}

case TYPE_INJECTED_CLASS_NAME: {
  CXXRecordDecl *D = ReadDeclAs<CXXRecordDecl>(*Loc.F, Record, Idx);
  QualType TST = readType(*Loc.F, Record, Idx); // probably derivable
  // FIXME: ASTContext::getInjectedClassNameType is not currently suitable
  // for AST reading, too much interdependencies.
  const Type *T = nullptr;
  for (auto *DI = D; DI; DI = DI->getPreviousDecl()) {
    if (const Type *Existing = DI->getTypeForDecl()) {
      T = Existing;
      break;
    }
  }
  if (!T) {
    T = new (Context, TypeAlignment) InjectedClassNameType(D, TST);
    for (auto *DI = D; DI; DI = DI->getPreviousDecl())
      DI->setTypeForDecl(T);
  }
  return QualType(T, 0);
}

case TYPE_TEMPLATE_TYPE_PARM: {
  unsigned Idx = 0;
  unsigned Depth = Record[Idx++];
  unsigned Index = Record[Idx++];
  bool Pack = Record[Idx++];
  TemplateTypeParmDecl *D
    = ReadDeclAs<TemplateTypeParmDecl>(*Loc.F, Record, Idx);
  return Context.getTemplateTypeParmType(Depth, Index, Pack, D);
}

case TYPE_DEPENDENT_NAME: {
  unsigned Idx = 0;
  ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++];
  NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx);
  const IdentifierInfo *Name = GetIdentifierInfo(*Loc.F, Record, Idx);
  QualType Canon = readType(*Loc.F, Record, Idx);
  if (!Canon.isNull())
    Canon = Context.getCanonicalType(Canon);
  return Context.getDependentNameType(Keyword, NNS, Name, Canon);
}

case TYPE_DEPENDENT_TEMPLATE_SPECIALIZATION: {
  unsigned Idx = 0;
  ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++];
  NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx);
  const IdentifierInfo *Name = GetIdentifierInfo(*Loc.F, Record, Idx);
  unsigned NumArgs = Record[Idx++];
  SmallVector<TemplateArgument, 8> Args;
  Args.reserve(NumArgs);
  while (NumArgs--)
    Args.push_back(ReadTemplateArgument(*Loc.F, Record, Idx));
  return Context.getDependentTemplateSpecializationType(Keyword, NNS, Name,
                                                        Args);
}

case TYPE_DEPENDENT_SIZED_ARRAY: {
  unsigned Idx = 0;

  // ArrayType
  QualType ElementType = readType(*Loc.F, Record, Idx);
  ArrayType::ArraySizeModifier ASM
    = (ArrayType::ArraySizeModifier)Record[Idx++];
  unsigned IndexTypeQuals = Record[Idx++];

  // DependentSizedArrayType
  Expr *NumElts = ReadExpr(*Loc.F);
  SourceRange Brackets = ReadSourceRange(*Loc.F, Record, Idx);

  return Context.getDependentSizedArrayType(ElementType, NumElts, ASM,
                                             IndexTypeQuals, Brackets);
}

case TYPE_TEMPLATE_SPECIALIZATION: {
  unsigned Idx = 0;
  bool IsDependent = Record[Idx++];
  TemplateName Name = ReadTemplateName(*Loc.F, Record, Idx);
  SmallVector<TemplateArgument, 8> Args;
  ReadTemplateArgumentList(Args, *Loc.F, Record, Idx);
  QualType Underlying = readType(*Loc.F, Record, Idx);
  QualType T;
  if (Underlying.isNull())
    T = Context.getCanonicalTemplateSpecializationType(Name, Args);
  else
    T = Context.getTemplateSpecializationType(Name, Args, Underlying);
  const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent);
  return T;
}

case TYPE_ATOMIC: {
  if (Record.size() != 1) {
    Error("Incorrect encoding of atomic type");
    return QualType();
  }
  QualType ValueType = readType(*Loc.F, Record, Idx);
  return Context.getAtomicType(ValueType);
}

case TYPE_PIPE: {
  if (Record.size() != 2) {
    Error("Incorrect encoding of pipe type");
    return QualType();
  }

  // Reading the pipe element type.
  QualType ElementType = readType(*Loc.F, Record, Idx);
  unsigned ReadOnly = Record[1];
  return Context.getPipeType(ElementType, ReadOnly);
}

case TYPE_DEPENDENT_SIZED_VECTOR: {
  unsigned Idx = 0;
  QualType ElementType = readType(*Loc.F, Record, Idx);
  Expr *SizeExpr = ReadExpr(*Loc.F);
  SourceLocation AttrLoc = ReadSourceLocation(*Loc.F, Record, Idx);
  unsigned VecKind = Record[Idx];

  return Context.getDependentVectorType(ElementType, SizeExpr, AttrLoc,
                                             (VectorType::VectorKind)VecKind);
}

case TYPE_DEPENDENT_SIZED_EXT_VECTOR: {
  unsigned Idx = 0;

  // DependentSizedExtVectorType
  QualType ElementType = readType(*Loc.F, Record, Idx);
  Expr *SizeExpr = ReadExpr(*Loc.F);
  SourceLocation AttrLoc = ReadSourceLocation(*Loc.F, Record, Idx);

  return Context.getDependentSizedExtVectorType(ElementType, SizeExpr,
                                                AttrLoc);
}

case TYPE_DEPENDENT_ADDRESS_SPACE: {
  unsigned Idx = 0;

  // DependentAddressSpaceType
  QualType PointeeType = readType(*Loc.F, Record, Idx);
  Expr *AddrSpaceExpr = ReadExpr(*Loc.F);
  SourceLocation AttrLoc = ReadSourceLocation(*Loc.F, Record, Idx);

  return Context.getDependentAddressSpaceType(PointeeType, AddrSpaceExpr,
                                                 AttrLoc);
}
}
llvm_unreachable("Invalid TypeCode!")::llvm::llvm_unreachable_internal("Invalid TypeCode!", "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 6824);
6825}

6827void ASTReader::readExceptionSpec(ModuleFile &ModuleFile,
                                SmallVectorImpl<QualType> &Exceptions,
                                FunctionProtoType::ExceptionSpecInfo &ESI,
                                const RecordData &Record, unsigned &Idx) {
ExceptionSpecificationType EST =
    static_cast<ExceptionSpecificationType>(Record[Idx++]);
ESI.Type = EST;
if (EST == EST_Dynamic) {
  for (unsigned I = 0, N = Record[Idx++]; I != N; ++I)
    Exceptions.push_back(readType(ModuleFile, Record, Idx));
  ESI.Exceptions = Exceptions;
} else if (isComputedNoexcept(EST)) {
  ESI.NoexceptExpr = ReadExpr(ModuleFile);
} else if (EST == EST_Uninstantiated) {
  ESI.SourceDecl = ReadDeclAs<FunctionDecl>(ModuleFile, Record, Idx);
  ESI.SourceTemplate = ReadDeclAs<FunctionDecl>(ModuleFile, Record, Idx);
} else if (EST == EST_Unevaluated) {
  ESI.SourceDecl = ReadDeclAs<FunctionDecl>(ModuleFile, Record, Idx);
}
6846}

6848namespace clang {

6850class TypeLocReader : public TypeLocVisitor<TypeLocReader> {
ModuleFile *F;
ASTReader *Reader;
const ASTReader::RecordData &Record;
unsigned &Idx;

SourceLocation ReadSourceLocation() {
  return Reader->ReadSourceLocation(*F, Record, Idx);
}

TypeSourceInfo *GetTypeSourceInfo() {
  return Reader->GetTypeSourceInfo(*F, Record, Idx);
}

NestedNameSpecifierLoc ReadNestedNameSpecifierLoc() {
  return Reader->ReadNestedNameSpecifierLoc(*F, Record, Idx);
}

Attr *ReadAttr() {
  return Reader->ReadAttr(*F, Record, Idx);
}

6872public:
TypeLocReader(ModuleFile &F, ASTReader &Reader,
              const ASTReader::RecordData &Record, unsigned &Idx)
    : F(&F), Reader(&Reader), Record(Record), Idx(Idx) {}

// We want compile-time assurance that we've enumerated all of
// these, so unfortunately we have to declare them first, then
// define them out-of-line.
6880#define ABSTRACT_TYPELOC(CLASS, PARENT)
6881#define TYPELOC(CLASS, PARENT) \
void Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc);
6883#include "clang/AST/TypeLocNodes.def"

void VisitFunctionTypeLoc(FunctionTypeLoc);
void VisitArrayTypeLoc(ArrayTypeLoc);
6887};

6889} // namespace clang

6891void TypeLocReader::VisitQualifiedTypeLoc(QualifiedTypeLoc TL) {
// nothing to do
6893}

6895void TypeLocReader::VisitBuiltinTypeLoc(BuiltinTypeLoc TL) {
TL.setBuiltinLoc(ReadSourceLocation());
if (TL.needsExtraLocalData()) {
  TL.setWrittenTypeSpec(static_cast<DeclSpec::TST>(Record[Idx++]));
  TL.setWrittenSignSpec(static_cast<DeclSpec::TSS>(Record[Idx++]));
  TL.setWrittenWidthSpec(static_cast<DeclSpec::TSW>(Record[Idx++]));
  TL.setModeAttr(Record[Idx++]);
}
6903}

6905void TypeLocReader::VisitComplexTypeLoc(ComplexTypeLoc TL) {
TL.setNameLoc(ReadSourceLocation());
6907}

6909void TypeLocReader::VisitPointerTypeLoc(PointerTypeLoc TL) {
TL.setStarLoc(ReadSourceLocation());
6911}

6913void TypeLocReader::VisitDecayedTypeLoc(DecayedTypeLoc TL) {
// nothing to do
6915}

6917void TypeLocReader::VisitAdjustedTypeLoc(AdjustedTypeLoc TL) {
// nothing to do
6919}

6921void TypeLocReader::VisitMacroQualifiedTypeLoc(MacroQualifiedTypeLoc TL) {
TL.setExpansionLoc(ReadSourceLocation());
6923}

6925void TypeLocReader::VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) {
TL.setCaretLoc(ReadSourceLocation());
6927}

6929void TypeLocReader::VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) {
TL.setAmpLoc(ReadSourceLocation());
6931}

6933void TypeLocReader::VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) {
TL.setAmpAmpLoc(ReadSourceLocation());
6935}

6937void TypeLocReader::VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) {
TL.setStarLoc(ReadSourceLocation());
TL.setClassTInfo(GetTypeSourceInfo());
6940}

6942void TypeLocReader::VisitArrayTypeLoc(ArrayTypeLoc TL) {
TL.setLBracketLoc(ReadSourceLocation());
TL.setRBracketLoc(ReadSourceLocation());
if (Record[Idx++])
  TL.setSizeExpr(Reader->ReadExpr(*F));
else
  TL.setSizeExpr(nullptr);
6949}

6951void TypeLocReader::VisitConstantArrayTypeLoc(ConstantArrayTypeLoc TL) {
VisitArrayTypeLoc(TL);
6953}

6955void TypeLocReader::VisitIncompleteArrayTypeLoc(IncompleteArrayTypeLoc TL) {
VisitArrayTypeLoc(TL);
6957}

6959void TypeLocReader::VisitVariableArrayTypeLoc(VariableArrayTypeLoc TL) {
VisitArrayTypeLoc(TL);
6961}

6963void TypeLocReader::VisitDependentSizedArrayTypeLoc(
                                          DependentSizedArrayTypeLoc TL) {
VisitArrayTypeLoc(TL);
6966}

6968void TypeLocReader::VisitDependentAddressSpaceTypeLoc(
  DependentAddressSpaceTypeLoc TL) {

  TL.setAttrNameLoc(ReadSourceLocation());
  SourceRange range;
  range.setBegin(ReadSourceLocation());
  range.setEnd(ReadSourceLocation());
  TL.setAttrOperandParensRange(range);
  TL.setAttrExprOperand(Reader->ReadExpr(*F));
6977}

6979void TypeLocReader::VisitDependentSizedExtVectorTypeLoc(
                                      DependentSizedExtVectorTypeLoc TL) {
TL.setNameLoc(ReadSourceLocation());
6982}

6984void TypeLocReader::VisitVectorTypeLoc(VectorTypeLoc TL) {
TL.setNameLoc(ReadSourceLocation());
6986}

6988void TypeLocReader::VisitDependentVectorTypeLoc(
  DependentVectorTypeLoc TL) {
TL.setNameLoc(ReadSourceLocation());
6991}

6993void TypeLocReader::VisitExtVectorTypeLoc(ExtVectorTypeLoc TL) {
TL.setNameLoc(ReadSourceLocation());
6995}

6997void TypeLocReader::VisitFunctionTypeLoc(FunctionTypeLoc TL) {
TL.setLocalRangeBegin(ReadSourceLocation());
TL.setLParenLoc(ReadSourceLocation());
TL.setRParenLoc(ReadSourceLocation());
TL.setExceptionSpecRange(SourceRange(Reader->ReadSourceLocation(*F, Record, Idx),
                                     Reader->ReadSourceLocation(*F, Record, Idx)));
TL.setLocalRangeEnd(ReadSourceLocation());
for (unsigned i = 0, e = TL.getNumParams(); i != e; ++i) {
  TL.setParam(i, Reader->ReadDeclAs<ParmVarDecl>(*F, Record, Idx));
}
7007}

7009void TypeLocReader::VisitFunctionProtoTypeLoc(FunctionProtoTypeLoc TL) {
VisitFunctionTypeLoc(TL);
7011}

7013void TypeLocReader::VisitFunctionNoProtoTypeLoc(FunctionNoProtoTypeLoc TL) {
VisitFunctionTypeLoc(TL);
7015}

7017void TypeLocReader::VisitUnresolvedUsingTypeLoc(UnresolvedUsingTypeLoc TL) {
TL.setNameLoc(ReadSourceLocation());
7019}

7021void TypeLocReader::VisitTypedefTypeLoc(TypedefTypeLoc TL) {
TL.setNameLoc(ReadSourceLocation());
7023}

7025void TypeLocReader::VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) {
TL.setTypeofLoc(ReadSourceLocation());
TL.setLParenLoc(ReadSourceLocation());
TL.setRParenLoc(ReadSourceLocation());
7029}

7031void TypeLocReader::VisitTypeOfTypeLoc(TypeOfTypeLoc TL) {
TL.setTypeofLoc(ReadSourceLocation());
TL.setLParenLoc(ReadSourceLocation());
TL.setRParenLoc(ReadSourceLocation());
TL.setUnderlyingTInfo(GetTypeSourceInfo());
7036}

7038void TypeLocReader::VisitDecltypeTypeLoc(DecltypeTypeLoc TL) {
TL.setNameLoc(ReadSourceLocation());
7040}

7042void TypeLocReader::VisitUnaryTransformTypeLoc(UnaryTransformTypeLoc TL) {
TL.setKWLoc(ReadSourceLocation());
TL.setLParenLoc(ReadSourceLocation());
TL.setRParenLoc(ReadSourceLocation());
TL.setUnderlyingTInfo(GetTypeSourceInfo());
7047}

7049void TypeLocReader::VisitAutoTypeLoc(AutoTypeLoc TL) {
TL.setNameLoc(ReadSourceLocation());
7051}

7053void TypeLocReader::VisitDeducedTemplateSpecializationTypeLoc(
  DeducedTemplateSpecializationTypeLoc TL) {
TL.setTemplateNameLoc(ReadSourceLocation());
7056}

7058void TypeLocReader::VisitRecordTypeLoc(RecordTypeLoc TL) {
TL.setNameLoc(ReadSourceLocation());
7060}

7062void TypeLocReader::VisitEnumTypeLoc(EnumTypeLoc TL) {
TL.setNameLoc(ReadSourceLocation());
7064}

7066void TypeLocReader::VisitAttributedTypeLoc(AttributedTypeLoc TL) {
TL.setAttr(ReadAttr());
7068}

7070void TypeLocReader::VisitTemplateTypeParmTypeLoc(TemplateTypeParmTypeLoc TL) {
TL.setNameLoc(ReadSourceLocation());
7072}

7074void TypeLocReader::VisitSubstTemplateTypeParmTypeLoc(
                                          SubstTemplateTypeParmTypeLoc TL) {
TL.setNameLoc(ReadSourceLocation());
7077}

7079void TypeLocReader::VisitSubstTemplateTypeParmPackTypeLoc(
                                        SubstTemplateTypeParmPackTypeLoc TL) {
TL.setNameLoc(ReadSourceLocation());
7082}

7084void TypeLocReader::VisitTemplateSpecializationTypeLoc(
                                         TemplateSpecializationTypeLoc TL) {
TL.setTemplateKeywordLoc(ReadSourceLocation());
TL.setTemplateNameLoc(ReadSourceLocation());
TL.setLAngleLoc(ReadSourceLocation());
TL.setRAngleLoc(ReadSourceLocation());
for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i)
  TL.setArgLocInfo(
      i,
      Reader->GetTemplateArgumentLocInfo(
          *F, TL.getTypePtr()->getArg(i).getKind(), Record, Idx));
7095}

7097void TypeLocReader::VisitParenTypeLoc(ParenTypeLoc TL) {
TL.setLParenLoc(ReadSourceLocation());
TL.setRParenLoc(ReadSourceLocation());
7100}

7102void TypeLocReader::VisitElaboratedTypeLoc(ElaboratedTypeLoc TL) {
TL.setElaboratedKeywordLoc(ReadSourceLocation());
TL.setQualifierLoc(ReadNestedNameSpecifierLoc());
7105}

7107void TypeLocReader::VisitInjectedClassNameTypeLoc(InjectedClassNameTypeLoc TL) {
TL.setNameLoc(ReadSourceLocation());
7109}

7111void TypeLocReader::VisitDependentNameTypeLoc(DependentNameTypeLoc TL) {
TL.setElaboratedKeywordLoc(ReadSourceLocation());
TL.setQualifierLoc(ReadNestedNameSpecifierLoc());
TL.setNameLoc(ReadSourceLocation());
7115}

7117void TypeLocReader::VisitDependentTemplateSpecializationTypeLoc(
     DependentTemplateSpecializationTypeLoc TL) {
TL.setElaboratedKeywordLoc(ReadSourceLocation());
TL.setQualifierLoc(ReadNestedNameSpecifierLoc());
TL.setTemplateKeywordLoc(ReadSourceLocation());
TL.setTemplateNameLoc(ReadSourceLocation());
TL.setLAngleLoc(ReadSourceLocation());
TL.setRAngleLoc(ReadSourceLocation());
for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I)
  TL.setArgLocInfo(
      I,
      Reader->GetTemplateArgumentLocInfo(
          *F, TL.getTypePtr()->getArg(I).getKind(), Record, Idx));
7130}

7132void TypeLocReader::VisitPackExpansionTypeLoc(PackExpansionTypeLoc TL) {
TL.setEllipsisLoc(ReadSourceLocation());
7134}

7136void TypeLocReader::VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) {
TL.setNameLoc(ReadSourceLocation());
7138}

7140void TypeLocReader::VisitObjCTypeParamTypeLoc(ObjCTypeParamTypeLoc TL) {
if (TL.getNumProtocols()) {
  TL.setProtocolLAngleLoc(ReadSourceLocation());
  TL.setProtocolRAngleLoc(ReadSourceLocation());
}
for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i)
  TL.setProtocolLoc(i, ReadSourceLocation());
7147}

7149void TypeLocReader::VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL) {
TL.setHasBaseTypeAsWritten(Record[Idx++]);
TL.setTypeArgsLAngleLoc(ReadSourceLocation());
TL.setTypeArgsRAngleLoc(ReadSourceLocation());
for (unsigned i = 0, e = TL.getNumTypeArgs(); i != e; ++i)
  TL.setTypeArgTInfo(i, GetTypeSourceInfo());
TL.setProtocolLAngleLoc(ReadSourceLocation());
TL.setProtocolRAngleLoc(ReadSourceLocation());
for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i)
  TL.setProtocolLoc(i, ReadSourceLocation());
7159}

7161void TypeLocReader::VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) {
TL.setStarLoc(ReadSourceLocation());
7163}

7165void TypeLocReader::VisitAtomicTypeLoc(AtomicTypeLoc TL) {
TL.setKWLoc(ReadSourceLocation());
TL.setLParenLoc(ReadSourceLocation());
TL.setRParenLoc(ReadSourceLocation());
7169}

7171void TypeLocReader::VisitPipeTypeLoc(PipeTypeLoc TL) {
TL.setKWLoc(ReadSourceLocation());
7173}

7175void ASTReader::ReadTypeLoc(ModuleFile &F, const ASTReader::RecordData &Record,
                          unsigned &Idx, TypeLoc TL) {
TypeLocReader TLR(F, *this, Record, Idx);
for (; !TL.isNull(); TL = TL.getNextTypeLoc())
  TLR.Visit(TL);
7180}

7182TypeSourceInfo *
7183ASTReader::GetTypeSourceInfo(ModuleFile &F, const ASTReader::RecordData &Record,
                           unsigned &Idx) {
QualType InfoTy = readType(F, Record, Idx);
if (InfoTy.isNull())
  return nullptr;

TypeSourceInfo *TInfo = getContext().CreateTypeSourceInfo(InfoTy);
ReadTypeLoc(F, Record, Idx, TInfo->getTypeLoc());
return TInfo;
7192}

7194QualType ASTReader::GetType(TypeID ID) {
assert(ContextObj && "reading type with no AST context")((ContextObj && "reading type with no AST context") ?
 static_cast<void> (0) : __assert_fail ("ContextObj && \"reading type with no AST context\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 7195, __PRETTY_FUNCTION__));
ASTContext &Context = *ContextObj;

unsigned FastQuals = ID & Qualifiers::FastMask;
unsigned Index = ID >> Qualifiers::FastWidth;

if (Index < NUM_PREDEF_TYPE_IDS) {
  QualType T;
  switch ((PredefinedTypeIDs)Index) {
  case PREDEF_TYPE_NULL_ID:
    return QualType();
  case PREDEF_TYPE_VOID_ID:
    T = Context.VoidTy;
    break;
  case PREDEF_TYPE_BOOL_ID:
    T = Context.BoolTy;
    break;
  case PREDEF_TYPE_CHAR_U_ID:
  case PREDEF_TYPE_CHAR_S_ID:
    // FIXME: Check that the signedness of CharTy is correct!
    T = Context.CharTy;
    break;
  case PREDEF_TYPE_UCHAR_ID:
    T = Context.UnsignedCharTy;
    break;
  case PREDEF_TYPE_USHORT_ID:
    T = Context.UnsignedShortTy;
    break;
  case PREDEF_TYPE_UINT_ID:
    T = Context.UnsignedIntTy;
    break;
  case PREDEF_TYPE_ULONG_ID:
    T = Context.UnsignedLongTy;
    break;
  case PREDEF_TYPE_ULONGLONG_ID:
    T = Context.UnsignedLongLongTy;
    break;
  case PREDEF_TYPE_UINT128_ID:
    T = Context.UnsignedInt128Ty;
    break;
  case PREDEF_TYPE_SCHAR_ID:
    T = Context.SignedCharTy;
    break;
  case PREDEF_TYPE_WCHAR_ID:
    T = Context.WCharTy;
    break;
  case PREDEF_TYPE_SHORT_ID:
    T = Context.ShortTy;
    break;
  case PREDEF_TYPE_INT_ID:
    T = Context.IntTy;
    break;
  case PREDEF_TYPE_LONG_ID:
    T = Context.LongTy;
    break;
  case PREDEF_TYPE_LONGLONG_ID:
    T = Context.LongLongTy;
    break;
  case PREDEF_TYPE_INT128_ID:
    T = Context.Int128Ty;
    break;
  case PREDEF_TYPE_HALF_ID:
    T = Context.HalfTy;
    break;
  case PREDEF_TYPE_FLOAT_ID:
    T = Context.FloatTy;
    break;
  case PREDEF_TYPE_DOUBLE_ID:
    T = Context.DoubleTy;
    break;
  case PREDEF_TYPE_LONGDOUBLE_ID:
    T = Context.LongDoubleTy;
    break;
  case PREDEF_TYPE_SHORT_ACCUM_ID:
    T = Context.ShortAccumTy;
    break;
  case PREDEF_TYPE_ACCUM_ID:
    T = Context.AccumTy;
    break;
  case PREDEF_TYPE_LONG_ACCUM_ID:
    T = Context.LongAccumTy;
    break;
  case PREDEF_TYPE_USHORT_ACCUM_ID:
    T = Context.UnsignedShortAccumTy;
    break;
  case PREDEF_TYPE_UACCUM_ID:
    T = Context.UnsignedAccumTy;
    break;
  case PREDEF_TYPE_ULONG_ACCUM_ID:
    T = Context.UnsignedLongAccumTy;
    break;
  case PREDEF_TYPE_SHORT_FRACT_ID:
    T = Context.ShortFractTy;
    break;
  case PREDEF_TYPE_FRACT_ID:
    T = Context.FractTy;
    break;
  case PREDEF_TYPE_LONG_FRACT_ID:
    T = Context.LongFractTy;
    break;
  case PREDEF_TYPE_USHORT_FRACT_ID:
    T = Context.UnsignedShortFractTy;
    break;
  case PREDEF_TYPE_UFRACT_ID:
    T = Context.UnsignedFractTy;
    break;
  case PREDEF_TYPE_ULONG_FRACT_ID:
    T = Context.UnsignedLongFractTy;
    break;
  case PREDEF_TYPE_SAT_SHORT_ACCUM_ID:
    T = Context.SatShortAccumTy;
    break;
  case PREDEF_TYPE_SAT_ACCUM_ID:
    T = Context.SatAccumTy;
    break;
  case PREDEF_TYPE_SAT_LONG_ACCUM_ID:
    T = Context.SatLongAccumTy;
    break;
  case PREDEF_TYPE_SAT_USHORT_ACCUM_ID:
    T = Context.SatUnsignedShortAccumTy;
    break;
  case PREDEF_TYPE_SAT_UACCUM_ID:
    T = Context.SatUnsignedAccumTy;
    break;
  case PREDEF_TYPE_SAT_ULONG_ACCUM_ID:
    T = Context.SatUnsignedLongAccumTy;
    break;
  case PREDEF_TYPE_SAT_SHORT_FRACT_ID:
    T = Context.SatShortFractTy;
    break;
  case PREDEF_TYPE_SAT_FRACT_ID:
    T = Context.SatFractTy;
    break;
  case PREDEF_TYPE_SAT_LONG_FRACT_ID:
    T = Context.SatLongFractTy;
    break;
  case PREDEF_TYPE_SAT_USHORT_FRACT_ID:
    T = Context.SatUnsignedShortFractTy;
    break;
  case PREDEF_TYPE_SAT_UFRACT_ID:
    T = Context.SatUnsignedFractTy;
    break;
  case PREDEF_TYPE_SAT_ULONG_FRACT_ID:
    T = Context.SatUnsignedLongFractTy;
    break;
  case PREDEF_TYPE_FLOAT16_ID:
    T = Context.Float16Ty;
    break;
  case PREDEF_TYPE_FLOAT128_ID:
    T = Context.Float128Ty;
    break;
  case PREDEF_TYPE_OVERLOAD_ID:
    T = Context.OverloadTy;
    break;
  case PREDEF_TYPE_BOUND_MEMBER:
    T = Context.BoundMemberTy;
    break;
  case PREDEF_TYPE_PSEUDO_OBJECT:
    T = Context.PseudoObjectTy;
    break;
  case PREDEF_TYPE_DEPENDENT_ID:
    T = Context.DependentTy;
    break;
  case PREDEF_TYPE_UNKNOWN_ANY:
    T = Context.UnknownAnyTy;
    break;
  case PREDEF_TYPE_NULLPTR_ID:
    T = Context.NullPtrTy;
    break;
  case PREDEF_TYPE_CHAR8_ID:
    T = Context.Char8Ty;
    break;
  case PREDEF_TYPE_CHAR16_ID:
    T = Context.Char16Ty;
    break;
  case PREDEF_TYPE_CHAR32_ID:
    T = Context.Char32Ty;
    break;
  case PREDEF_TYPE_OBJC_ID:
    T = Context.ObjCBuiltinIdTy;
    break;
  case PREDEF_TYPE_OBJC_CLASS:
    T = Context.ObjCBuiltinClassTy;
    break;
  case PREDEF_TYPE_OBJC_SEL:
    T = Context.ObjCBuiltinSelTy;
    break;
7382#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
  case PREDEF_TYPE_##Id##_ID: \
    T = Context.SingletonId; \
    break;
7386#include "clang/Basic/OpenCLImageTypes.def"
7387#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
  case PREDEF_TYPE_##Id##_ID: \
    T = Context.Id##Ty; \
    break;
7391#include "clang/Basic/OpenCLExtensionTypes.def"
  case PREDEF_TYPE_SAMPLER_ID:
    T = Context.OCLSamplerTy;
    break;
  case PREDEF_TYPE_EVENT_ID:
    T = Context.OCLEventTy;
    break;
  case PREDEF_TYPE_CLK_EVENT_ID:
    T = Context.OCLClkEventTy;
    break;
  case PREDEF_TYPE_QUEUE_ID:
    T = Context.OCLQueueTy;
    break;
  case PREDEF_TYPE_RESERVE_ID_ID:
    T = Context.OCLReserveIDTy;
    break;
  case PREDEF_TYPE_AUTO_DEDUCT:
    T = Context.getAutoDeductType();
    break;
  case PREDEF_TYPE_AUTO_RREF_DEDUCT:
    T = Context.getAutoRRefDeductType();
    break;
  case PREDEF_TYPE_ARC_UNBRIDGED_CAST:
    T = Context.ARCUnbridgedCastTy;
    break;
  case PREDEF_TYPE_BUILTIN_FN:
    T = Context.BuiltinFnTy;
    break;
  case PREDEF_TYPE_OMP_ARRAY_SECTION:
    T = Context.OMPArraySectionTy;
    break;
7422#define SVE_TYPE(Name, Id, SingletonId) \
  case PREDEF_TYPE_##Id##_ID: \
    T = Context.SingletonId; \
    break;
7426#include "clang/Basic/AArch64SVEACLETypes.def"
  }

  assert(!T.isNull() && "Unknown predefined type")((!T.isNull() && "Unknown predefined type") ? static_cast
<void> (0) : __assert_fail ("!T.isNull() && \"Unknown predefined type\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 7429, __PRETTY_FUNCTION__));
  return T.withFastQualifiers(FastQuals);
}

Index -= NUM_PREDEF_TYPE_IDS;
assert(Index < TypesLoaded.size() && "Type index out-of-range")((Index < TypesLoaded.size() && "Type index out-of-range"
) ? static_cast<void> (0) : __assert_fail ("Index < TypesLoaded.size() && \"Type index out-of-range\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 7434, __PRETTY_FUNCTION__));
if (TypesLoaded[Index].isNull()) {
  TypesLoaded[Index] = readTypeRecord(Index);
  if (TypesLoaded[Index].isNull())
    return QualType();

  TypesLoaded[Index]->setFromAST();
  if (DeserializationListener)
    DeserializationListener->TypeRead(TypeIdx::fromTypeID(ID),
                                      TypesLoaded[Index]);
}

return TypesLoaded[Index].withFastQualifiers(FastQuals);
7447}

7449QualType ASTReader::getLocalType(ModuleFile &F, unsigned LocalID) {
return GetType(getGlobalTypeID(F, LocalID));
7451}

7453serialization::TypeID
7454ASTReader::getGlobalTypeID(ModuleFile &F, unsigned LocalID) const {
unsigned FastQuals = LocalID & Qualifiers::FastMask;
unsigned LocalIndex = LocalID >> Qualifiers::FastWidth;

if (LocalIndex < NUM_PREDEF_TYPE_IDS)
  return LocalID;

if (!F.ModuleOffsetMap.empty())
  ReadModuleOffsetMap(F);

ContinuousRangeMap<uint32_t, int, 2>::iterator I
  = F.TypeRemap.find(LocalIndex - NUM_PREDEF_TYPE_IDS);
assert(I != F.TypeRemap.end() && "Invalid index into type index remap")((I != F.TypeRemap.end() && "Invalid index into type index remap"
) ? static_cast<void> (0) : __assert_fail ("I != F.TypeRemap.end() && \"Invalid index into type index remap\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 7466, __PRETTY_FUNCTION__));

unsigned GlobalIndex = LocalIndex + I->second;
return (GlobalIndex << Qualifiers::FastWidth) | FastQuals;
7470}

7472TemplateArgumentLocInfo
7473ASTReader::GetTemplateArgumentLocInfo(ModuleFile &F,
                                    TemplateArgument::ArgKind Kind,
                                    const RecordData &Record,
                                    unsigned &Index) {
switch (Kind) {
case TemplateArgument::Expression:
  return ReadExpr(F);
case TemplateArgument::Type:
  return GetTypeSourceInfo(F, Record, Index);
case TemplateArgument::Template: {
  NestedNameSpecifierLoc QualifierLoc = ReadNestedNameSpecifierLoc(F, Record,
                                                                   Index);
  SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index);
  return TemplateArgumentLocInfo(QualifierLoc, TemplateNameLoc,
                                 SourceLocation());
}
case TemplateArgument::TemplateExpansion: {
  NestedNameSpecifierLoc QualifierLoc = ReadNestedNameSpecifierLoc(F, Record,
                                                                   Index);
  SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index);
  SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Index);
  return TemplateArgumentLocInfo(QualifierLoc, TemplateNameLoc,
                                 EllipsisLoc);
}
case TemplateArgument::Null:
case TemplateArgument::Integral:
case TemplateArgument::Declaration:
case TemplateArgument::NullPtr:
case TemplateArgument::Pack:
  // FIXME: Is this right?
  return TemplateArgumentLocInfo();
}
llvm_unreachable("unexpected template argument loc")::llvm::llvm_unreachable_internal("unexpected template argument loc"
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 7505);
7506}

7508TemplateArgumentLoc
7509ASTReader::ReadTemplateArgumentLoc(ModuleFile &F,
                                 const RecordData &Record, unsigned &Index) {
TemplateArgument Arg = ReadTemplateArgument(F, Record, Index);

if (Arg.getKind() == TemplateArgument::Expression) {
  if (Record[Index++]) // bool InfoHasSameExpr.
    return TemplateArgumentLoc(Arg, TemplateArgumentLocInfo(Arg.getAsExpr()));
}
return TemplateArgumentLoc(Arg, GetTemplateArgumentLocInfo(F, Arg.getKind(),
                                                           Record, Index));
7519}

7521const ASTTemplateArgumentListInfo*
7522ASTReader::ReadASTTemplateArgumentListInfo(ModuleFile &F,
                                         const RecordData &Record,
                                         unsigned &Index) {
SourceLocation LAngleLoc = ReadSourceLocation(F, Record, Index);
SourceLocation RAngleLoc = ReadSourceLocation(F, Record, Index);
unsigned NumArgsAsWritten = Record[Index++];
TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
for (unsigned i = 0; i != NumArgsAsWritten; ++i)
  TemplArgsInfo.addArgument(ReadTemplateArgumentLoc(F, Record, Index));
return ASTTemplateArgumentListInfo::Create(getContext(), TemplArgsInfo);
7532}

7534Decl *ASTReader::GetExternalDecl(uint32_t ID) {
return GetDecl(ID);
7536}

7538void ASTReader::CompleteRedeclChain(const Decl *D) {
if (NumCurrentElementsDeserializing) {
  // We arrange to not care about the complete redeclaration chain while we're
  // deserializing. Just remember that the AST has marked this one as complete
  // but that it's not actually complete yet, so we know we still need to
  // complete it later.
  PendingIncompleteDeclChains.push_back(const_cast<Decl*>(D));
  return;
}

const DeclContext *DC = D->getDeclContext()->getRedeclContext();

// If this is a named declaration, complete it by looking it up
// within its context.
//
// FIXME: Merging a function definition should merge
// all mergeable entities within it.
if (isa<TranslationUnitDecl>(DC) || isa<NamespaceDecl>(DC) ||
    isa<CXXRecordDecl>(DC) || isa<EnumDecl>(DC)) {
  if (DeclarationName Name = cast<NamedDecl>(D)->getDeclName()) {
    if (!getContext().getLangOpts().CPlusPlus &&
        isa<TranslationUnitDecl>(DC)) {
      // Outside of C++, we don't have a lookup table for the TU, so update
      // the identifier instead. (For C++ modules, we don't store decls
      // in the serialized identifier table, so we do the lookup in the TU.)
      auto *II = Name.getAsIdentifierInfo();
      assert(II && "non-identifier name in C?")((II && "non-identifier name in C?") ? static_cast<
void> (0) : __assert_fail ("II && \"non-identifier name in C?\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 7564, __PRETTY_FUNCTION__));
      if (II->isOutOfDate())
        updateOutOfDateIdentifier(*II);
    } else
      DC->lookup(Name);
  } else if (needsAnonymousDeclarationNumber(cast<NamedDecl>(D))) {
    // Find all declarations of this kind from the relevant context.
    for (auto *DCDecl : cast<Decl>(D->getLexicalDeclContext())->redecls()) {
      auto *DC = cast<DeclContext>(DCDecl);
      SmallVector<Decl*, 8> Decls;
      FindExternalLexicalDecls(
          DC, [&](Decl::Kind K) { return K == D->getKind(); }, Decls);
    }
  }
}

if (auto *CTSD = dyn_cast<ClassTemplateSpecializationDecl>(D))
  CTSD->getSpecializedTemplate()->LoadLazySpecializations();
if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(D))
  VTSD->getSpecializedTemplate()->LoadLazySpecializations();
if (auto *FD = dyn_cast<FunctionDecl>(D)) {
  if (auto *Template = FD->getPrimaryTemplate())
    Template->LoadLazySpecializations();
}
7588}

7590CXXCtorInitializer **
7591ASTReader::GetExternalCXXCtorInitializers(uint64_t Offset) {
RecordLocation Loc = getLocalBitOffset(Offset);
BitstreamCursor &Cursor = Loc.F->DeclsCursor;
SavedStreamPosition SavedPosition(Cursor);
if (llvm::Error Err = Cursor.JumpToBit(Loc.Offset)) {
  Error(std::move(Err));
  return nullptr;
}
ReadingKindTracker ReadingKind(Read_Decl, *this);

RecordData Record;
Expected<unsigned> MaybeCode = Cursor.ReadCode();
if (!MaybeCode) {
  Error(MaybeCode.takeError());
  return nullptr;
}
unsigned Code = MaybeCode.get();

Expected<unsigned> MaybeRecCode = Cursor.readRecord(Code, Record);
if (!MaybeRecCode) {
  Error(MaybeRecCode.takeError());
  return nullptr;
}
if (MaybeRecCode.get() != DECL_CXX_CTOR_INITIALIZERS) {
  Error("malformed AST file: missing C++ ctor initializers");
  return nullptr;
}

unsigned Idx = 0;
return ReadCXXCtorInitializers(*Loc.F, Record, Idx);
7621}

7623CXXBaseSpecifier *ASTReader::GetExternalCXXBaseSpecifiers(uint64_t Offset) {
assert(ContextObj && "reading base specifiers with no AST context")((ContextObj && "reading base specifiers with no AST context"
) ? static_cast<void> (0) : __assert_fail ("ContextObj && \"reading base specifiers with no AST context\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 7624, __PRETTY_FUNCTION__));
ASTContext &Context = *ContextObj;

RecordLocation Loc = getLocalBitOffset(Offset);
BitstreamCursor &Cursor = Loc.F->DeclsCursor;
SavedStreamPosition SavedPosition(Cursor);
if (llvm::Error Err = Cursor.JumpToBit(Loc.Offset)) {
  Error(std::move(Err));
  return nullptr;
}
ReadingKindTracker ReadingKind(Read_Decl, *this);
RecordData Record;

Expected<unsigned> MaybeCode = Cursor.ReadCode();
if (!MaybeCode) {
  Error(MaybeCode.takeError());
  return nullptr;
}
unsigned Code = MaybeCode.get();

Expected<unsigned> MaybeRecCode = Cursor.readRecord(Code, Record);
if (!MaybeRecCode) {
  Error(MaybeCode.takeError());
  return nullptr;
}
unsigned RecCode = MaybeRecCode.get();

if (RecCode != DECL_CXX_BASE_SPECIFIERS) {
  Error("malformed AST file: missing C++ base specifiers");
  return nullptr;
}

unsigned Idx = 0;
unsigned NumBases = Record[Idx++];
void *Mem = Context.Allocate(sizeof(CXXBaseSpecifier) * NumBases);
CXXBaseSpecifier *Bases = new (Mem) CXXBaseSpecifier [NumBases];
for (unsigned I = 0; I != NumBases; ++I)
  Bases[I] = ReadCXXBaseSpecifier(*Loc.F, Record, Idx);
return Bases;
7663}

7665serialization::DeclID
7666ASTReader::getGlobalDeclID(ModuleFile &F, LocalDeclID LocalID) const {
if (LocalID < NUM_PREDEF_DECL_IDS)
  return LocalID;

if (!F.ModuleOffsetMap.empty())
  ReadModuleOffsetMap(F);

ContinuousRangeMap<uint32_t, int, 2>::iterator I
  = F.DeclRemap.find(LocalID - NUM_PREDEF_DECL_IDS);
assert(I != F.DeclRemap.end() && "Invalid index into decl index remap")((I != F.DeclRemap.end() && "Invalid index into decl index remap"
) ? static_cast<void> (0) : __assert_fail ("I != F.DeclRemap.end() && \"Invalid index into decl index remap\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 7675, __PRETTY_FUNCTION__));

return LocalID + I->second;
7678}

7680bool ASTReader::isDeclIDFromModule(serialization::GlobalDeclID ID,
                                 ModuleFile &M) const {
// Predefined decls aren't from any module.
if (ID < NUM_PREDEF_DECL_IDS)
  return false;

return ID - NUM_PREDEF_DECL_IDS >= M.BaseDeclID &&
       ID - NUM_PREDEF_DECL_IDS < M.BaseDeclID + M.LocalNumDecls;
7688}

7690ModuleFile *ASTReader::getOwningModuleFile(const Decl *D) {
if (!D->isFromASTFile())
  return nullptr;
GlobalDeclMapType::const_iterator I = GlobalDeclMap.find(D->getGlobalID());
assert(I != GlobalDeclMap.end() && "Corrupted global declaration map")((I != GlobalDeclMap.end() && "Corrupted global declaration map"
) ? static_cast<void> (0) : __assert_fail ("I != GlobalDeclMap.end() && \"Corrupted global declaration map\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 7694, __PRETTY_FUNCTION__));
return I->second;
7696}

7698SourceLocation ASTReader::getSourceLocationForDeclID(GlobalDeclID ID) {
if (ID < NUM_PREDEF_DECL_IDS)
  return SourceLocation();

unsigned Index = ID - NUM_PREDEF_DECL_IDS;

if (Index > DeclsLoaded.size()) {
  Error("declaration ID out-of-range for AST file");
  return SourceLocation();
}

if (Decl *D = DeclsLoaded[Index])
  return D->getLocation();

SourceLocation Loc;
DeclCursorForID(ID, Loc);
return Loc;
7715}

7717static Decl *getPredefinedDecl(ASTContext &Context, PredefinedDeclIDs ID) {
switch (ID) {
case PREDEF_DECL_NULL_ID:
  return nullptr;

case PREDEF_DECL_TRANSLATION_UNIT_ID:
  return Context.getTranslationUnitDecl();

case PREDEF_DECL_OBJC_ID_ID:
  return Context.getObjCIdDecl();

case PREDEF_DECL_OBJC_SEL_ID:
  return Context.getObjCSelDecl();

case PREDEF_DECL_OBJC_CLASS_ID:
  return Context.getObjCClassDecl();

case PREDEF_DECL_OBJC_PROTOCOL_ID:
  return Context.getObjCProtocolDecl();

case PREDEF_DECL_INT_128_ID:
  return Context.getInt128Decl();

case PREDEF_DECL_UNSIGNED_INT_128_ID:
  return Context.getUInt128Decl();

case PREDEF_DECL_OBJC_INSTANCETYPE_ID:
  return Context.getObjCInstanceTypeDecl();

case PREDEF_DECL_BUILTIN_VA_LIST_ID:
  return Context.getBuiltinVaListDecl();

case PREDEF_DECL_VA_LIST_TAG:
  return Context.getVaListTagDecl();

case PREDEF_DECL_BUILTIN_MS_VA_LIST_ID:
  return Context.getBuiltinMSVaListDecl();

case PREDEF_DECL_EXTERN_C_CONTEXT_ID:
  return Context.getExternCContextDecl();

case PREDEF_DECL_MAKE_INTEGER_SEQ_ID:
  return Context.getMakeIntegerSeqDecl();

case PREDEF_DECL_CF_CONSTANT_STRING_ID:
  return Context.getCFConstantStringDecl();

case PREDEF_DECL_CF_CONSTANT_STRING_TAG_ID:
  return Context.getCFConstantStringTagDecl();

case PREDEF_DECL_TYPE_PACK_ELEMENT_ID:
  return Context.getTypePackElementDecl();
}
llvm_unreachable("PredefinedDeclIDs unknown enum value")::llvm::llvm_unreachable_internal("PredefinedDeclIDs unknown enum value"
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 7770);
7771}

7773Decl *ASTReader::GetExistingDecl(DeclID ID) {
assert(ContextObj && "reading decl with no AST context")((ContextObj && "reading decl with no AST context") ?
 static_cast<void> (0) : __assert_fail ("ContextObj && \"reading decl with no AST context\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 7774, __PRETTY_FUNCTION__));
if (ID < NUM_PREDEF_DECL_IDS) {
  Decl *D = getPredefinedDecl(*ContextObj, (PredefinedDeclIDs)ID);
  if (D) {
    // Track that we have merged the declaration with ID \p ID into the
    // pre-existing predefined declaration \p D.
    auto &Merged = KeyDecls[D->getCanonicalDecl()];
    if (Merged.empty())
      Merged.push_back(ID);
  }
  return D;
}

unsigned Index = ID - NUM_PREDEF_DECL_IDS;

if (Index >= DeclsLoaded.size()) {
  assert(0 && "declaration ID out-of-range for AST file")((0 && "declaration ID out-of-range for AST file") ? static_cast
<void> (0) : __assert_fail ("0 && \"declaration ID out-of-range for AST file\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 7790, __PRETTY_FUNCTION__));
  Error("declaration ID out-of-range for AST file");
  return nullptr;
}

return DeclsLoaded[Index];
7796}

7798Decl *ASTReader::GetDecl(DeclID ID) {
if (ID < NUM_PREDEF_DECL_IDS)
  return GetExistingDecl(ID);

unsigned Index = ID - NUM_PREDEF_DECL_IDS;

if (Index >= DeclsLoaded.size()) {
  assert(0 && "declaration ID out-of-range for AST file")((0 && "declaration ID out-of-range for AST file") ? static_cast
<void> (0) : __assert_fail ("0 && \"declaration ID out-of-range for AST file\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 7805, __PRETTY_FUNCTION__));
  Error("declaration ID out-of-range for AST file");
  return nullptr;
}

if (!DeclsLoaded[Index]) {
  ReadDeclRecord(ID);
  if (DeserializationListener)
    DeserializationListener->DeclRead(ID, DeclsLoaded[Index]);
}

return DeclsLoaded[Index];
7817}

7819DeclID ASTReader::mapGlobalIDToModuleFileGlobalID(ModuleFile &M,
                                                DeclID GlobalID) {
if (GlobalID < NUM_PREDEF_DECL_IDS)
  return GlobalID;

GlobalDeclMapType::const_iterator I = GlobalDeclMap.find(GlobalID);
assert(I != GlobalDeclMap.end() && "Corrupted global declaration map")((I != GlobalDeclMap.end() && "Corrupted global declaration map"
) ? static_cast<void> (0) : __assert_fail ("I != GlobalDeclMap.end() && \"Corrupted global declaration map\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 7825, __PRETTY_FUNCTION__));
ModuleFile *Owner = I->second;

llvm::DenseMap<ModuleFile *, serialization::DeclID>::iterator Pos
  = M.GlobalToLocalDeclIDs.find(Owner);
if (Pos == M.GlobalToLocalDeclIDs.end())
  return 0;

return GlobalID - Owner->BaseDeclID + Pos->second;
7834}

7836serialization::DeclID ASTReader::ReadDeclID(ModuleFile &F,
                                          const RecordData &Record,
                                          unsigned &Idx) {
if (Idx >= Record.size()) {
  Error("Corrupted AST file");
  return 0;
}

return getGlobalDeclID(F, Record[Idx++]);
7845}

7847/// Resolve the offset of a statement into a statement.
7848///
7849/// This operation will read a new statement from the external
7850/// source each time it is called, and is meant to be used via a
7851/// LazyOffsetPtr (which is used by Decls for the body of functions, etc).
7852Stmt *ASTReader::GetExternalDeclStmt(uint64_t Offset) {
// Switch case IDs are per Decl.
ClearSwitchCaseIDs();

// Offset here is a global offset across the entire chain.
RecordLocation Loc = getLocalBitOffset(Offset);
if (llvm::Error Err = Loc.F->DeclsCursor.JumpToBit(Loc.Offset)) {
  Error(std::move(Err));
  return nullptr;
}
assert(NumCurrentElementsDeserializing == 0 &&((NumCurrentElementsDeserializing == 0 && "should not be called while already deserializing"
) ? static_cast<void> (0) : __assert_fail ("NumCurrentElementsDeserializing == 0 && \"should not be called while already deserializing\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 7863, __PRETTY_FUNCTION__))
       "should not be called while already deserializing")((NumCurrentElementsDeserializing == 0 && "should not be called while already deserializing"
) ? static_cast<void> (0) : __assert_fail ("NumCurrentElementsDeserializing == 0 && \"should not be called while already deserializing\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 7863, __PRETTY_FUNCTION__));
Deserializing D(this);
return ReadStmtFromStream(*Loc.F);
7866}

7868void ASTReader::FindExternalLexicalDecls(
  const DeclContext *DC, llvm::function_ref<bool(Decl::Kind)> IsKindWeWant,
  SmallVectorImpl<Decl *> &Decls) {
bool PredefsVisited[NUM_PREDEF_DECL_IDS] = {};

auto Visit = [&] (ModuleFile *M, LexicalContents LexicalDecls) {
  assert(LexicalDecls.size() % 2 == 0 && "expected an even number of entries")((LexicalDecls.size() % 2 == 0 && "expected an even number of entries"
) ? static_cast<void> (0) : __assert_fail ("LexicalDecls.size() % 2 == 0 && \"expected an even number of entries\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 7874, __PRETTY_FUNCTION__));
  for (int I = 0, N = LexicalDecls.size(); I != N; I += 2) {
    auto K = (Decl::Kind)+LexicalDecls[I];
    if (!IsKindWeWant(K))
      continue;

    auto ID = (serialization::DeclID)+LexicalDecls[I + 1];

    // Don't add predefined declarations to the lexical context more
    // than once.
    if (ID < NUM_PREDEF_DECL_IDS) {
      if (PredefsVisited[ID])
        continue;

      PredefsVisited[ID] = true;
    }

    if (Decl *D = GetLocalDecl(*M, ID)) {
      assert(D->getKind() == K && "wrong kind for lexical decl")((D->getKind() == K && "wrong kind for lexical decl"
) ? static_cast<void> (0) : __assert_fail ("D->getKind() == K && \"wrong kind for lexical decl\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 7892, __PRETTY_FUNCTION__));
      if (!DC->isDeclInLexicalTraversal(D))
        Decls.push_back(D);
    }
  }
};

if (isa<TranslationUnitDecl>(DC)) {
  for (auto Lexical : TULexicalDecls)
    Visit(Lexical.first, Lexical.second);
} else {
  auto I = LexicalDecls.find(DC);
  if (I != LexicalDecls.end())
    Visit(I->second.first, I->second.second);
}

++NumLexicalDeclContextsRead;
7909}

7911namespace {

7913class DeclIDComp {
ASTReader &Reader;
ModuleFile &Mod;

7917public:
DeclIDComp(ASTReader &Reader, ModuleFile &M) : Reader(Reader), Mod(M) {}

bool operator()(LocalDeclID L, LocalDeclID R) const {
  SourceLocation LHS = getLocation(L);
  SourceLocation RHS = getLocation(R);
  return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
}

bool operator()(SourceLocation LHS, LocalDeclID R) const {
  SourceLocation RHS = getLocation(R);
  return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
}

bool operator()(LocalDeclID L, SourceLocation RHS) const {
  SourceLocation LHS = getLocation(L);
  return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
}

SourceLocation getLocation(LocalDeclID ID) const {
  return Reader.getSourceManager().getFileLoc(
          Reader.getSourceLocationForDeclID(Reader.getGlobalDeclID(Mod, ID)));
}
7940};

7942} // namespace

7944void ASTReader::FindFileRegionDecls(FileID File,
                                  unsigned Offset, unsigned Length,
                                  SmallVectorImpl<Decl *> &Decls) {
SourceManager &SM = getSourceManager();

llvm::DenseMap<FileID, FileDeclsInfo>::iterator I = FileDeclIDs.find(File);
if (I == FileDeclIDs.end())
  return;

FileDeclsInfo &DInfo = I->second;
if (DInfo.Decls.empty())
  return;

SourceLocation
  BeginLoc = SM.getLocForStartOfFile(File).getLocWithOffset(Offset);
SourceLocation EndLoc = BeginLoc.getLocWithOffset(Length);

DeclIDComp DIDComp(*this, *DInfo.Mod);
ArrayRef<serialization::LocalDeclID>::iterator BeginIt =
    llvm::lower_bound(DInfo.Decls, BeginLoc, DIDComp);
if (BeginIt != DInfo.Decls.begin())
  --BeginIt;

// If we are pointing at a top-level decl inside an objc container, we need
// to backtrack until we find it otherwise we will fail to report that the
// region overlaps with an objc container.
while (BeginIt != DInfo.Decls.begin() &&
       GetDecl(getGlobalDeclID(*DInfo.Mod, *BeginIt))
           ->isTopLevelDeclInObjCContainer())
  --BeginIt;

ArrayRef<serialization::LocalDeclID>::iterator EndIt =
    llvm::upper_bound(DInfo.Decls, EndLoc, DIDComp);
if (EndIt != DInfo.Decls.end())
  ++EndIt;

for (ArrayRef<serialization::LocalDeclID>::iterator
       DIt = BeginIt; DIt != EndIt; ++DIt)
  Decls.push_back(GetDecl(getGlobalDeclID(*DInfo.Mod, *DIt)));
7983}

7985bool
7986ASTReader::FindExternalVisibleDeclsByName(const DeclContext *DC,
                                        DeclarationName Name) {
assert(DC->hasExternalVisibleStorage() && DC == DC->getPrimaryContext() &&((DC->hasExternalVisibleStorage() && DC == DC->
getPrimaryContext() && "DeclContext has no visible decls in storage"
) ? static_cast<void> (0) : __assert_fail ("DC->hasExternalVisibleStorage() && DC == DC->getPrimaryContext() && \"DeclContext has no visible decls in storage\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 7989, __PRETTY_FUNCTION__))
       "DeclContext has no visible decls in storage")((DC->hasExternalVisibleStorage() && DC == DC->
getPrimaryContext() && "DeclContext has no visible decls in storage"
) ? static_cast<void> (0) : __assert_fail ("DC->hasExternalVisibleStorage() && DC == DC->getPrimaryContext() && \"DeclContext has no visible decls in storage\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 7989, __PRETTY_FUNCTION__));
if (!Name)
  return false;

auto It = Lookups.find(DC);
if (It == Lookups.end())
  return false;

Deserializing LookupResults(this);

// Load the list of declarations.
SmallVector<NamedDecl *, 64> Decls;
for (DeclID ID : It->second.Table.find(Name)) {
  NamedDecl *ND = cast<NamedDecl>(GetDecl(ID));
  if (ND->getDeclName() == Name)
    Decls.push_back(ND);
}

++NumVisibleDeclContextsRead;
SetExternalVisibleDeclsForName(DC, Name, Decls);
return !Decls.empty();
8010}

8012void ASTReader::completeVisibleDeclsMap(const DeclContext *DC) {
if (!DC->hasExternalVisibleStorage())
  return;

auto It = Lookups.find(DC);
assert(It != Lookups.end() &&((It != Lookups.end() && "have external visible storage but no lookup tables"
) ? static_cast<void> (0) : __assert_fail ("It != Lookups.end() && \"have external visible storage but no lookup tables\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 8018, __PRETTY_FUNCTION__))
       "have external visible storage but no lookup tables")((It != Lookups.end() && "have external visible storage but no lookup tables"
) ? static_cast<void> (0) : __assert_fail ("It != Lookups.end() && \"have external visible storage but no lookup tables\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 8018, __PRETTY_FUNCTION__));

DeclsMap Decls;

for (DeclID ID : It->second.Table.findAll()) {
  NamedDecl *ND = cast<NamedDecl>(GetDecl(ID));
  Decls[ND->getDeclName()].push_back(ND);
}

++NumVisibleDeclContextsRead;

for (DeclsMap::iterator I = Decls.begin(), E = Decls.end(); I != E; ++I) {
  SetExternalVisibleDeclsForName(DC, I->first, I->second);
}
const_cast<DeclContext *>(DC)->setHasExternalVisibleStorage(false);
8033}

8035const serialization::reader::DeclContextLookupTable *
8036ASTReader::getLoadedLookupTables(DeclContext *Primary) const {
auto I = Lookups.find(Primary);
return I == Lookups.end() ? nullptr : &I->second;
8039}

8041/// Under non-PCH compilation the consumer receives the objc methods
8042/// before receiving the implementation, and codegen depends on this.
8043/// We simulate this by deserializing and passing to consumer the methods of the
8044/// implementation before passing the deserialized implementation decl.
8045static void PassObjCImplDeclToConsumer(ObjCImplDecl *ImplD,
                                     ASTConsumer *Consumer) {
assert(ImplD && Consumer)((ImplD && Consumer) ? static_cast<void> (0) : __assert_fail
 ("ImplD && Consumer", "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 8047, __PRETTY_FUNCTION__));

for (auto *I : ImplD->methods())
  Consumer->HandleInterestingDecl(DeclGroupRef(I));

Consumer->HandleInterestingDecl(DeclGroupRef(ImplD));
8053}

8055void ASTReader::PassInterestingDeclToConsumer(Decl *D) {
if (ObjCImplDecl *ImplD = dyn_cast<ObjCImplDecl>(D))
  PassObjCImplDeclToConsumer(ImplD, Consumer);
else
  Consumer->HandleInterestingDecl(DeclGroupRef(D));
8060}

8062void ASTReader::StartTranslationUnit(ASTConsumer *Consumer) {
this->Consumer = Consumer;

if (Consumer)
  PassInterestingDeclsToConsumer();

if (DeserializationListener)
  DeserializationListener->ReaderInitialized(this);
8070}

8072void ASTReader::PrintStats() {
std::fprintf(stderrstderr, "*** AST File Statistics:\n");

unsigned NumTypesLoaded
  = TypesLoaded.size() - std::count(TypesLoaded.begin(), TypesLoaded.end(),
                                    QualType());
unsigned NumDeclsLoaded
  = DeclsLoaded.size() - std::count(DeclsLoaded.begin(), DeclsLoaded.end(),
                                    (Decl *)nullptr);
unsigned NumIdentifiersLoaded
  = IdentifiersLoaded.size() - std::count(IdentifiersLoaded.begin(),
                                          IdentifiersLoaded.end(),
                                          (IdentifierInfo *)nullptr);
unsigned NumMacrosLoaded
  = MacrosLoaded.size() - std::count(MacrosLoaded.begin(),
                                     MacrosLoaded.end(),
                                     (MacroInfo *)nullptr);
unsigned NumSelectorsLoaded
  = SelectorsLoaded.size() - std::count(SelectorsLoaded.begin(),
                                        SelectorsLoaded.end(),
                                        Selector());

if (unsigned TotalNumSLocEntries = getTotalNumSLocs())
  std::fprintf(stderrstderr, "  %u/%u source location entries read (%f%%)\n",
               NumSLocEntriesRead, TotalNumSLocEntries,
               ((float)NumSLocEntriesRead/TotalNumSLocEntries * 100));
if (!TypesLoaded.empty())
  std::fprintf(stderrstderr, "  %u/%u types read (%f%%)\n",
               NumTypesLoaded, (unsigned)TypesLoaded.size(),
               ((float)NumTypesLoaded/TypesLoaded.size() * 100));
if (!DeclsLoaded.empty())
  std::fprintf(stderrstderr, "  %u/%u declarations read (%f%%)\n",
               NumDeclsLoaded, (unsigned)DeclsLoaded.size(),
               ((float)NumDeclsLoaded/DeclsLoaded.size() * 100));
if (!IdentifiersLoaded.empty())
  std::fprintf(stderrstderr, "  %u/%u identifiers read (%f%%)\n",
               NumIdentifiersLoaded, (unsigned)IdentifiersLoaded.size(),
               ((float)NumIdentifiersLoaded/IdentifiersLoaded.size() * 100));
if (!MacrosLoaded.empty())
  std::fprintf(stderrstderr, "  %u/%u macros read (%f%%)\n",
               NumMacrosLoaded, (unsigned)MacrosLoaded.size(),
               ((float)NumMacrosLoaded/MacrosLoaded.size() * 100));
if (!SelectorsLoaded.empty())
  std::fprintf(stderrstderr, "  %u/%u selectors read (%f%%)\n",
               NumSelectorsLoaded, (unsigned)SelectorsLoaded.size(),
               ((float)NumSelectorsLoaded/SelectorsLoaded.size() * 100));
if (TotalNumStatements)
  std::fprintf(stderrstderr, "  %u/%u statements read (%f%%)\n",
               NumStatementsRead, TotalNumStatements,
               ((float)NumStatementsRead/TotalNumStatements * 100));
if (TotalNumMacros)
  std::fprintf(stderrstderr, "  %u/%u macros read (%f%%)\n",
               NumMacrosRead, TotalNumMacros,
               ((float)NumMacrosRead/TotalNumMacros * 100));
if (TotalLexicalDeclContexts)
  std::fprintf(stderrstderr, "  %u/%u lexical declcontexts read (%f%%)\n",
               NumLexicalDeclContextsRead, TotalLexicalDeclContexts,
               ((float)NumLexicalDeclContextsRead/TotalLexicalDeclContexts
                * 100));
if (TotalVisibleDeclContexts)
  std::fprintf(stderrstderr, "  %u/%u visible declcontexts read (%f%%)\n",
               NumVisibleDeclContextsRead, TotalVisibleDeclContexts,
               ((float)NumVisibleDeclContextsRead/TotalVisibleDeclContexts
                * 100));
if (TotalNumMethodPoolEntries)
  std::fprintf(stderrstderr, "  %u/%u method pool entries read (%f%%)\n",
               NumMethodPoolEntriesRead, TotalNumMethodPoolEntries,
               ((float)NumMethodPoolEntriesRead/TotalNumMethodPoolEntries
                * 100));
if (NumMethodPoolLookups)
  std::fprintf(stderrstderr, "  %u/%u method pool lookups succeeded (%f%%)\n",
               NumMethodPoolHits, NumMethodPoolLookups,
               ((float)NumMethodPoolHits/NumMethodPoolLookups * 100.0));
if (NumMethodPoolTableLookups)
  std::fprintf(stderrstderr, "  %u/%u method pool table lookups succeeded (%f%%)\n",
               NumMethodPoolTableHits, NumMethodPoolTableLookups,
               ((float)NumMethodPoolTableHits/NumMethodPoolTableLookups
                * 100.0));
if (NumIdentifierLookupHits)
  std::fprintf(stderrstderr,
               "  %u / %u identifier table lookups succeeded (%f%%)\n",
               NumIdentifierLookupHits, NumIdentifierLookups,
               (double)NumIdentifierLookupHits*100.0/NumIdentifierLookups);

if (GlobalIndex) {
  std::fprintf(stderrstderr, "\n");
  GlobalIndex->printStats();
}

std::fprintf(stderrstderr, "\n");
dump();
std::fprintf(stderrstderr, "\n");
8164}

8166template<typename Key, typename ModuleFile, unsigned InitialCapacity>
8167LLVM_DUMP_METHOD__attribute__((noinline)) __attribute__((__used__)) static void
8168dumpModuleIDMap(StringRef Name,
              const ContinuousRangeMap<Key, ModuleFile *,
                                       InitialCapacity> &Map) {
if (Map.begin() == Map.end())
  return;

using MapType = ContinuousRangeMap<Key, ModuleFile *, InitialCapacity>;

llvm::errs() << Name << ":\n";
for (typename MapType::const_iterator I = Map.begin(), IEnd = Map.end();
     I != IEnd; ++I) {
  llvm::errs() << "  " << I->first << " -> " << I->second->FileName
    << "\n";
}
8182}

8184LLVM_DUMP_METHOD__attribute__((noinline)) __attribute__((__used__)) void ASTReader::dump() {
llvm::errs() << "*** PCH/ModuleFile Remappings:\n";
dumpModuleIDMap("Global bit offset map", GlobalBitOffsetsMap);
dumpModuleIDMap("Global source location entry map", GlobalSLocEntryMap);
dumpModuleIDMap("Global type map", GlobalTypeMap);
dumpModuleIDMap("Global declaration map", GlobalDeclMap);
dumpModuleIDMap("Global identifier map", GlobalIdentifierMap);
dumpModuleIDMap("Global macro map", GlobalMacroMap);
dumpModuleIDMap("Global submodule map", GlobalSubmoduleMap);
dumpModuleIDMap("Global selector map", GlobalSelectorMap);
dumpModuleIDMap("Global preprocessed entity map",
                GlobalPreprocessedEntityMap);

llvm::errs() << "\n*** PCH/Modules Loaded:";
for (ModuleFile &M : ModuleMgr)
  M.dump();
8200}

8202/// Return the amount of memory used by memory buffers, breaking down
8203/// by heap-backed versus mmap'ed memory.
8204void ASTReader::getMemoryBufferSizes(MemoryBufferSizes &sizes) const {
for (ModuleFile &I : ModuleMgr) {
  if (llvm::MemoryBuffer *buf = I.Buffer) {
    size_t bytes = buf->getBufferSize();
    switch (buf->getBufferKind()) {
      case llvm::MemoryBuffer::MemoryBuffer_Malloc:
        sizes.malloc_bytes += bytes;
        break;
      case llvm::MemoryBuffer::MemoryBuffer_MMap:
        sizes.mmap_bytes += bytes;
        break;
    }
  }
}
8218}

8220void ASTReader::InitializeSema(Sema &S) {
SemaObj = &S;
S.addExternalSource(this);

// Makes sure any declarations that were deserialized "too early"
// still get added to the identifier's declaration chains.
for (uint64_t ID : PreloadedDeclIDs) {
  NamedDecl *D = cast<NamedDecl>(GetDecl(ID));
  pushExternalDeclIntoScope(D, D->getDeclName());
}
PreloadedDeclIDs.clear();

// FIXME: What happens if these are changed by a module import?
if (!FPPragmaOptions.empty()) {
  assert(FPPragmaOptions.size() == 1 && "Wrong number of FP_PRAGMA_OPTIONS")((FPPragmaOptions.size() == 1 && "Wrong number of FP_PRAGMA_OPTIONS"
) ? static_cast<void> (0) : __assert_fail ("FPPragmaOptions.size() == 1 && \"Wrong number of FP_PRAGMA_OPTIONS\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 8234, __PRETTY_FUNCTION__));
  SemaObj->FPFeatures = FPOptions(FPPragmaOptions[0]);
}

SemaObj->OpenCLFeatures.copy(OpenCLExtensions);
SemaObj->OpenCLTypeExtMap = OpenCLTypeExtMap;
SemaObj->OpenCLDeclExtMap = OpenCLDeclExtMap;

UpdateSema();
8243}

8245void ASTReader::UpdateSema() {
assert(SemaObj && "no Sema to update")((SemaObj && "no Sema to update") ? static_cast<void
> (0) : __assert_fail ("SemaObj && \"no Sema to update\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 8246, __PRETTY_FUNCTION__));

// Load the offsets of the declarations that Sema references.
// They will be lazily deserialized when needed.
if (!SemaDeclRefs.empty()) {
  assert(SemaDeclRefs.size() % 3 == 0)((SemaDeclRefs.size() % 3 == 0) ? static_cast<void> (0)
 : __assert_fail ("SemaDeclRefs.size() % 3 == 0", "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 8251, __PRETTY_FUNCTION__));
  for (unsigned I = 0; I != SemaDeclRefs.size(); I += 3) {
    if (!SemaObj->StdNamespace)
      SemaObj->StdNamespace = SemaDeclRefs[I];
    if (!SemaObj->StdBadAlloc)
      SemaObj->StdBadAlloc = SemaDeclRefs[I+1];
    if (!SemaObj->StdAlignValT)
      SemaObj->StdAlignValT = SemaDeclRefs[I+2];
  }
  SemaDeclRefs.clear();
}

// Update the state of pragmas. Use the same API as if we had encountered the
// pragma in the source.
if(OptimizeOffPragmaLocation.isValid())
  SemaObj->ActOnPragmaOptimize(/* On = */ false, OptimizeOffPragmaLocation);
if (PragmaMSStructState != -1)
  SemaObj->ActOnPragmaMSStruct((PragmaMSStructKind)PragmaMSStructState);
if (PointersToMembersPragmaLocation.isValid()) {
  SemaObj->ActOnPragmaMSPointersToMembers(
      (LangOptions::PragmaMSPointersToMembersKind)
          PragmaMSPointersToMembersState,
      PointersToMembersPragmaLocation);
}
SemaObj->ForceCUDAHostDeviceDepth = ForceCUDAHostDeviceDepth;

if (PragmaPackCurrentValue) {
  // The bottom of the stack might have a default value. It must be adjusted
  // to the current value to ensure that the packing state is preserved after
  // popping entries that were included/imported from a PCH/module.
  bool DropFirst = false;
  if (!PragmaPackStack.empty() &&
      PragmaPackStack.front().Location.isInvalid()) {
    assert(PragmaPackStack.front().Value == SemaObj->PackStack.DefaultValue &&((PragmaPackStack.front().Value == SemaObj->PackStack.DefaultValue
 && "Expected a default alignment value") ? static_cast
<void> (0) : __assert_fail ("PragmaPackStack.front().Value == SemaObj->PackStack.DefaultValue && \"Expected a default alignment value\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 8285, __PRETTY_FUNCTION__))
           "Expected a default alignment value")((PragmaPackStack.front().Value == SemaObj->PackStack.DefaultValue
 && "Expected a default alignment value") ? static_cast
<void> (0) : __assert_fail ("PragmaPackStack.front().Value == SemaObj->PackStack.DefaultValue && \"Expected a default alignment value\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 8285, __PRETTY_FUNCTION__));
    SemaObj->PackStack.Stack.emplace_back(
        PragmaPackStack.front().SlotLabel, SemaObj->PackStack.CurrentValue,
        SemaObj->PackStack.CurrentPragmaLocation,
        PragmaPackStack.front().PushLocation);
    DropFirst = true;
  }
  for (const auto &Entry :
       llvm::makeArrayRef(PragmaPackStack).drop_front(DropFirst ? 1 : 0))
    SemaObj->PackStack.Stack.emplace_back(Entry.SlotLabel, Entry.Value,
                                          Entry.Location, Entry.PushLocation);
  if (PragmaPackCurrentLocation.isInvalid()) {
    assert(*PragmaPackCurrentValue == SemaObj->PackStack.DefaultValue &&((*PragmaPackCurrentValue == SemaObj->PackStack.DefaultValue
 && "Expected a default alignment value") ? static_cast
<void> (0) : __assert_fail ("*PragmaPackCurrentValue == SemaObj->PackStack.DefaultValue && \"Expected a default alignment value\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 8298, __PRETTY_FUNCTION__))
           "Expected a default alignment value")((*PragmaPackCurrentValue == SemaObj->PackStack.DefaultValue
 && "Expected a default alignment value") ? static_cast
<void> (0) : __assert_fail ("*PragmaPackCurrentValue == SemaObj->PackStack.DefaultValue && \"Expected a default alignment value\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 8298, __PRETTY_FUNCTION__));
    // Keep the current values.
  } else {
    SemaObj->PackStack.CurrentValue = *PragmaPackCurrentValue;
    SemaObj->PackStack.CurrentPragmaLocation = PragmaPackCurrentLocation;
  }
}
8305}

8307IdentifierInfo *ASTReader::get(StringRef Name) {
// Note that we are loading an identifier.
Deserializing AnIdentifier(this);

IdentifierLookupVisitor Visitor(Name, /*PriorGeneration=*/0,
                                NumIdentifierLookups,
                                NumIdentifierLookupHits);

// We don't need to do identifier table lookups in C++ modules (we preload
// all interesting declarations, and don't need to use the scope for name
// lookups). Perform the lookup in PCH files, though, since we don't build
// a complete initial identifier table if we're carrying on from a PCH.
if (PP.getLangOpts().CPlusPlus) {
  for (auto F : ModuleMgr.pch_modules())
    if (Visitor(*F))
      break;
} else {
  // If there is a global index, look there first to determine which modules
  // provably do not have any results for this identifier.
  GlobalModuleIndex::HitSet Hits;
  GlobalModuleIndex::HitSet *HitsPtr = nullptr;
  if (!loadGlobalIndex()) {
    if (GlobalIndex->lookupIdentifier(Name, Hits)) {
      HitsPtr = &Hits;
    }
  }

  ModuleMgr.visit(Visitor, HitsPtr);
}

IdentifierInfo *II = Visitor.getIdentifierInfo();
markIdentifierUpToDate(II);
return II;
8340}

8342namespace clang {

/// An identifier-lookup iterator that enumerates all of the
/// identifiers stored within a set of AST files.
class ASTIdentifierIterator : public IdentifierIterator {
  /// The AST reader whose identifiers are being enumerated.
  const ASTReader &Reader;

  /// The current index into the chain of AST files stored in
  /// the AST reader.
  unsigned Index;

  /// The current position within the identifier lookup table
  /// of the current AST file.
  ASTIdentifierLookupTable::key_iterator Current;

  /// The end position within the identifier lookup table of
  /// the current AST file.
  ASTIdentifierLookupTable::key_iterator End;

  /// Whether to skip any modules in the ASTReader.
  bool SkipModules;

public:
  explicit ASTIdentifierIterator(const ASTReader &Reader,
                                 bool SkipModules = false);

  StringRef Next() override;
};

8372} // namespace clang

8374ASTIdentifierIterator::ASTIdentifierIterator(const ASTReader &Reader,
                                           bool SkipModules)
  : Reader(Reader), Index(Reader.ModuleMgr.size()), SkipModules(SkipModules) {
8377}

8379StringRef ASTIdentifierIterator::Next() {
while (Current == End) {
  // If we have exhausted all of our AST files, we're done.
  if (Index == 0)
    return StringRef();

  --Index;
  ModuleFile &F = Reader.ModuleMgr[Index];
  if (SkipModules && F.isModule())
    continue;

  ASTIdentifierLookupTable *IdTable =
      (ASTIdentifierLookupTable *)F.IdentifierLookupTable;
  Current = IdTable->key_begin();
  End = IdTable->key_end();
}

// We have any identifiers remaining in the current AST file; return
// the next one.
StringRef Result = *Current;
++Current;
return Result;
8401}

8403namespace {

8405/// A utility for appending two IdentifierIterators.
8406class ChainedIdentifierIterator : public IdentifierIterator {
std::unique_ptr<IdentifierIterator> Current;
std::unique_ptr<IdentifierIterator> Queued;

8410public:
ChainedIdentifierIterator(std::unique_ptr<IdentifierIterator> First,
                          std::unique_ptr<IdentifierIterator> Second)
    : Current(std::move(First)), Queued(std::move(Second)) {}

StringRef Next() override {
  if (!Current)
    return StringRef();

  StringRef result = Current->Next();
  if (!result.empty())
    return result;

  // Try the queued iterator, which may itself be empty.
  Current.reset();
  std::swap(Current, Queued);
  return Next();
}
8428};

8430} // namespace

8432IdentifierIterator *ASTReader::getIdentifiers() {
if (!loadGlobalIndex()) {
  std::unique_ptr<IdentifierIterator> ReaderIter(
      new ASTIdentifierIterator(*this, /*SkipModules=*/true));
  std::unique_ptr<IdentifierIterator> ModulesIter(
      GlobalIndex->createIdentifierIterator());
  return new ChainedIdentifierIterator(std::move(ReaderIter),
                                       std::move(ModulesIter));
}

return new ASTIdentifierIterator(*this);
8443}

8445namespace clang {
8446namespace serialization {

class ReadMethodPoolVisitor {
  ASTReader &Reader;
  Selector Sel;
  unsigned PriorGeneration;
  unsigned InstanceBits = 0;
  unsigned FactoryBits = 0;
  bool InstanceHasMoreThanOneDecl = false;
  bool FactoryHasMoreThanOneDecl = false;
  SmallVector<ObjCMethodDecl *, 4> InstanceMethods;
  SmallVector<ObjCMethodDecl *, 4> FactoryMethods;

public:
  ReadMethodPoolVisitor(ASTReader &Reader, Selector Sel,
                        unsigned PriorGeneration)
      : Reader(Reader), Sel(Sel), PriorGeneration(PriorGeneration) {}

  bool operator()(ModuleFile &M) {
    if (!M.SelectorLookupTable)
      return false;

    // If we've already searched this module file, skip it now.
    if (M.Generation <= PriorGeneration)
      return true;

    ++Reader.NumMethodPoolTableLookups;
    ASTSelectorLookupTable *PoolTable
      = (ASTSelectorLookupTable*)M.SelectorLookupTable;
    ASTSelectorLookupTable::iterator Pos = PoolTable->find(Sel);
    if (Pos == PoolTable->end())
      return false;

    ++Reader.NumMethodPoolTableHits;
    ++Reader.NumSelectorsRead;
    // FIXME: Not quite happy with the statistics here. We probably should
    // disable this tracking when called via LoadSelector.
    // Also, should entries without methods count as misses?
    ++Reader.NumMethodPoolEntriesRead;
    ASTSelectorLookupTrait::data_type Data = *Pos;
    if (Reader.DeserializationListener)
      Reader.DeserializationListener->SelectorRead(Data.ID, Sel);

    InstanceMethods.append(Data.Instance.begin(), Data.Instance.end());
    FactoryMethods.append(Data.Factory.begin(), Data.Factory.end());
    InstanceBits = Data.InstanceBits;
    FactoryBits = Data.FactoryBits;
    InstanceHasMoreThanOneDecl = Data.InstanceHasMoreThanOneDecl;
    FactoryHasMoreThanOneDecl = Data.FactoryHasMoreThanOneDecl;
    return true;
  }

  /// Retrieve the instance methods found by this visitor.
  ArrayRef<ObjCMethodDecl *> getInstanceMethods() const {
    return InstanceMethods;
  }

  /// Retrieve the instance methods found by this visitor.
  ArrayRef<ObjCMethodDecl *> getFactoryMethods() const {
    return FactoryMethods;
  }

  unsigned getInstanceBits() const { return InstanceBits; }
  unsigned getFactoryBits() const { return FactoryBits; }

  bool instanceHasMoreThanOneDecl() const {
    return InstanceHasMoreThanOneDecl;
  }

  bool factoryHasMoreThanOneDecl() const { return FactoryHasMoreThanOneDecl; }
};

8518} // namespace serialization
8519} // namespace clang

8521/// Add the given set of methods to the method list.
8522static void addMethodsToPool(Sema &S, ArrayRef<ObjCMethodDecl *> Methods,
                           ObjCMethodList &List) {
for (unsigned I = 0, N = Methods.size(); I != N; ++I) {
  S.addMethodToGlobalList(&List, Methods[I]);
}
8527}

8529void ASTReader::ReadMethodPool(Selector Sel) {
// Get the selector generation and update it to the current generation.
unsigned &Generation = SelectorGeneration[Sel];
unsigned PriorGeneration = Generation;
Generation = getGeneration();
SelectorOutOfDate[Sel] = false;

// Search for methods defined with this selector.
++NumMethodPoolLookups;
ReadMethodPoolVisitor Visitor(*this, Sel, PriorGeneration);
ModuleMgr.visit(Visitor);

if (Visitor.getInstanceMethods().empty() &&
    Visitor.getFactoryMethods().empty())
  return;

++NumMethodPoolHits;

if (!getSema())
  return;

Sema &S = *getSema();
Sema::GlobalMethodPool::iterator Pos
  = S.MethodPool.insert(std::make_pair(Sel, Sema::GlobalMethods())).first;

Pos->second.first.setBits(Visitor.getInstanceBits());
Pos->second.first.setHasMoreThanOneDecl(Visitor.instanceHasMoreThanOneDecl());
Pos->second.second.setBits(Visitor.getFactoryBits());
Pos->second.second.setHasMoreThanOneDecl(Visitor.factoryHasMoreThanOneDecl());

// Add methods to the global pool *after* setting hasMoreThanOneDecl, since
// when building a module we keep every method individually and may need to
// update hasMoreThanOneDecl as we add the methods.
addMethodsToPool(S, Visitor.getInstanceMethods(), Pos->second.first);
addMethodsToPool(S, Visitor.getFactoryMethods(), Pos->second.second);
8564}

8566void ASTReader::updateOutOfDateSelector(Selector Sel) {
if (SelectorOutOfDate[Sel])
  ReadMethodPool(Sel);
8569}

8571void ASTReader::ReadKnownNamespaces(
                        SmallVectorImpl<NamespaceDecl *> &Namespaces) {
Namespaces.clear();

for (unsigned I = 0, N = KnownNamespaces.size(); I != N; ++I) {
  if (NamespaceDecl *Namespace
              = dyn_cast_or_null<NamespaceDecl>(GetDecl(KnownNamespaces[I])))
    Namespaces.push_back(Namespace);
}
8580}

8582void ASTReader::ReadUndefinedButUsed(
  llvm::MapVector<NamedDecl *, SourceLocation> &Undefined) {
for (unsigned Idx = 0, N = UndefinedButUsed.size(); Idx != N;) {
  NamedDecl *D = cast<NamedDecl>(GetDecl(UndefinedButUsed[Idx++]));
  SourceLocation Loc =
      SourceLocation::getFromRawEncoding(UndefinedButUsed[Idx++]);
  Undefined.insert(std::make_pair(D, Loc));
}
8590}

8592void ASTReader::ReadMismatchingDeleteExpressions(llvm::MapVector<
  FieldDecl *, llvm::SmallVector<std::pair<SourceLocation, bool>, 4>> &
                                                   Exprs) {
for (unsigned Idx = 0, N = DelayedDeleteExprs.size(); Idx != N;) {
  FieldDecl *FD = cast<FieldDecl>(GetDecl(DelayedDeleteExprs[Idx++]));
  uint64_t Count = DelayedDeleteExprs[Idx++];
  for (uint64_t C = 0; C < Count; ++C) {
    SourceLocation DeleteLoc =
        SourceLocation::getFromRawEncoding(DelayedDeleteExprs[Idx++]);
    const bool IsArrayForm = DelayedDeleteExprs[Idx++];
    Exprs[FD].push_back(std::make_pair(DeleteLoc, IsArrayForm));
  }
}
8605}

8607void ASTReader::ReadTentativeDefinitions(
                SmallVectorImpl<VarDecl *> &TentativeDefs) {
for (unsigned I = 0, N = TentativeDefinitions.size(); I != N; ++I) {
  VarDecl *Var = dyn_cast_or_null<VarDecl>(GetDecl(TentativeDefinitions[I]));
  if (Var)
    TentativeDefs.push_back(Var);
}
TentativeDefinitions.clear();
8615}

8617void ASTReader::ReadUnusedFileScopedDecls(
                             SmallVectorImpl<const DeclaratorDecl *> &Decls) {
for (unsigned I = 0, N = UnusedFileScopedDecls.size(); I != N; ++I) {
  DeclaratorDecl *D
    = dyn_cast_or_null<DeclaratorDecl>(GetDecl(UnusedFileScopedDecls[I]));
  if (D)
    Decls.push_back(D);
}
UnusedFileScopedDecls.clear();
8626}

8628void ASTReader::ReadDelegatingConstructors(
                               SmallVectorImpl<CXXConstructorDecl *> &Decls) {
for (unsigned I = 0, N = DelegatingCtorDecls.size(); I != N; ++I) {
  CXXConstructorDecl *D
    = dyn_cast_or_null<CXXConstructorDecl>(GetDecl(DelegatingCtorDecls[I]));
  if (D)
    Decls.push_back(D);
}
DelegatingCtorDecls.clear();
8637}

8639void ASTReader::ReadExtVectorDecls(SmallVectorImpl<TypedefNameDecl *> &Decls) {
for (unsigned I = 0, N = ExtVectorDecls.size(); I != N; ++I) {
  TypedefNameDecl *D
    = dyn_cast_or_null<TypedefNameDecl>(GetDecl(ExtVectorDecls[I]));
  if (D)
    Decls.push_back(D);
}
ExtVectorDecls.clear();
8647}

8649void ASTReader::ReadUnusedLocalTypedefNameCandidates(
  llvm::SmallSetVector<const TypedefNameDecl *, 4> &Decls) {
for (unsigned I = 0, N = UnusedLocalTypedefNameCandidates.size(); I != N;
     ++I) {
  TypedefNameDecl *D = dyn_cast_or_null<TypedefNameDecl>(
      GetDecl(UnusedLocalTypedefNameCandidates[I]));
  if (D)
    Decls.insert(D);
}
UnusedLocalTypedefNameCandidates.clear();
8659}

8661void ASTReader::ReadReferencedSelectors(
     SmallVectorImpl<std::pair<Selector, SourceLocation>> &Sels) {
if (ReferencedSelectorsData.empty())
  return;

// If there are @selector references added them to its pool. This is for
// implementation of -Wselector.
unsigned int DataSize = ReferencedSelectorsData.size()-1;
unsigned I = 0;
while (I < DataSize) {
  Selector Sel = DecodeSelector(ReferencedSelectorsData[I++]);
  SourceLocation SelLoc
    = SourceLocation::getFromRawEncoding(ReferencedSelectorsData[I++]);
  Sels.push_back(std::make_pair(Sel, SelLoc));
}
ReferencedSelectorsData.clear();
8677}

8679void ASTReader::ReadWeakUndeclaredIdentifiers(
     SmallVectorImpl<std::pair<IdentifierInfo *, WeakInfo>> &WeakIDs) {
if (WeakUndeclaredIdentifiers.empty())
  return;

for (unsigned I = 0, N = WeakUndeclaredIdentifiers.size(); I < N; /*none*/) {
  IdentifierInfo *WeakId
    = DecodeIdentifierInfo(WeakUndeclaredIdentifiers[I++]);
  IdentifierInfo *AliasId
    = DecodeIdentifierInfo(WeakUndeclaredIdentifiers[I++]);
  SourceLocation Loc
    = SourceLocation::getFromRawEncoding(WeakUndeclaredIdentifiers[I++]);
  bool Used = WeakUndeclaredIdentifiers[I++];
  WeakInfo WI(AliasId, Loc);
  WI.setUsed(Used);
  WeakIDs.push_back(std::make_pair(WeakId, WI));
}
WeakUndeclaredIdentifiers.clear();
8697}

8699void ASTReader::ReadUsedVTables(SmallVectorImpl<ExternalVTableUse> &VTables) {
for (unsigned Idx = 0, N = VTableUses.size(); Idx < N; /* In loop */) {
  ExternalVTableUse VT;
  VT.Record = dyn_cast_or_null<CXXRecordDecl>(GetDecl(VTableUses[Idx++]));
  VT.Location = SourceLocation::getFromRawEncoding(VTableUses[Idx++]);
  VT.DefinitionRequired = VTableUses[Idx++];
  VTables.push_back(VT);
}

VTableUses.clear();
8709}

8711void ASTReader::ReadPendingInstantiations(
     SmallVectorImpl<std::pair<ValueDecl *, SourceLocation>> &Pending) {
for (unsigned Idx = 0, N = PendingInstantiations.size(); Idx < N;) {
  ValueDecl *D = cast<ValueDecl>(GetDecl(PendingInstantiations[Idx++]));
  SourceLocation Loc
    = SourceLocation::getFromRawEncoding(PendingInstantiations[Idx++]);

  Pending.push_back(std::make_pair(D, Loc));
}
PendingInstantiations.clear();
8721}

8723void ASTReader::ReadLateParsedTemplates(
  llvm::MapVector<const FunctionDecl *, std::unique_ptr<LateParsedTemplate>>
      &LPTMap) {
for (unsigned Idx = 0, N = LateParsedTemplates.size(); Idx < N;
     /* In loop */) {
  FunctionDecl *FD = cast<FunctionDecl>(GetDecl(LateParsedTemplates[Idx++]));

  auto LT = std::make_unique<LateParsedTemplate>();
  LT->D = GetDecl(LateParsedTemplates[Idx++]);

  ModuleFile *F = getOwningModuleFile(LT->D);
  assert(F && "No module")((F && "No module") ? static_cast<void> (0) : __assert_fail
 ("F && \"No module\"", "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 8734, __PRETTY_FUNCTION__));

  unsigned TokN = LateParsedTemplates[Idx++];
  LT->Toks.reserve(TokN);
  for (unsigned T = 0; T < TokN; ++T)
    LT->Toks.push_back(ReadToken(*F, LateParsedTemplates, Idx));

  LPTMap.insert(std::make_pair(FD, std::move(LT)));
}

LateParsedTemplates.clear();
8745}

8747void ASTReader::LoadSelector(Selector Sel) {
// It would be complicated to avoid reading the methods anyway. So don't.
ReadMethodPool(Sel);
8750}

8752void ASTReader::SetIdentifierInfo(IdentifierID ID, IdentifierInfo *II) {
assert(ID && "Non-zero identifier ID required")((ID && "Non-zero identifier ID required") ? static_cast
<void> (0) : __assert_fail ("ID && \"Non-zero identifier ID required\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 8753, __PRETTY_FUNCTION__));
assert(ID <= IdentifiersLoaded.size() && "identifier ID out of range")((ID <= IdentifiersLoaded.size() && "identifier ID out of range"
) ? static_cast<void> (0) : __assert_fail ("ID <= IdentifiersLoaded.size() && \"identifier ID out of range\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 8754, __PRETTY_FUNCTION__));
IdentifiersLoaded[ID - 1] = II;
if (DeserializationListener)
  DeserializationListener->IdentifierRead(ID, II);
8758}

8760/// Set the globally-visible declarations associated with the given
8761/// identifier.
8762///
8763/// If the AST reader is currently in a state where the given declaration IDs
8764/// cannot safely be resolved, they are queued until it is safe to resolve
8765/// them.
8766///
8767/// \param II an IdentifierInfo that refers to one or more globally-visible
8768/// declarations.
8769///
8770/// \param DeclIDs the set of declaration IDs with the name @p II that are
8771/// visible at global scope.
8772///
8773/// \param Decls if non-null, this vector will be populated with the set of
8774/// deserialized declarations. These declarations will not be pushed into
8775/// scope.
8776void
8777ASTReader::SetGloballyVisibleDecls(IdentifierInfo *II,
                            const SmallVectorImpl<uint32_t> &DeclIDs,
                                 SmallVectorImpl<Decl *> *Decls) {
if (NumCurrentElementsDeserializing && !Decls) {
  PendingIdentifierInfos[II].append(DeclIDs.begin(), DeclIDs.end());
  return;
}

for (unsigned I = 0, N = DeclIDs.size(); I != N; ++I) {
  if (!SemaObj) {
    // Queue this declaration so that it will be added to the
    // translation unit scope and identifier's declaration chain
    // once a Sema object is known.
    PreloadedDeclIDs.push_back(DeclIDs[I]);
    continue;
  }

  NamedDecl *D = cast<NamedDecl>(GetDecl(DeclIDs[I]));

  // If we're simply supposed to record the declarations, do so now.
  if (Decls) {
    Decls->push_back(D);
    continue;
  }

  // Introduce this declaration into the translation-unit scope
  // and add it to the declaration chain for this identifier, so
  // that (unqualified) name lookup will find it.
  pushExternalDeclIntoScope(D, II);
}
8807}

8809IdentifierInfo *ASTReader::DecodeIdentifierInfo(IdentifierID ID) {
if (ID == 0)
  return nullptr;

if (IdentifiersLoaded.empty()) {
  Error("no identifier table in AST file");
  return nullptr;
}

ID -= 1;
if (!IdentifiersLoaded[ID]) {
  GlobalIdentifierMapType::iterator I = GlobalIdentifierMap.find(ID + 1);
  assert(I != GlobalIdentifierMap.end() && "Corrupted global identifier map")((I != GlobalIdentifierMap.end() && "Corrupted global identifier map"
) ? static_cast<void> (0) : __assert_fail ("I != GlobalIdentifierMap.end() && \"Corrupted global identifier map\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 8821, __PRETTY_FUNCTION__));
  ModuleFile *M = I->second;
  unsigned Index = ID - M->BaseIdentifierID;
  const char *Str = M->IdentifierTableData + M->IdentifierOffsets[Index];

  // All of the strings in the AST file are preceded by a 16-bit length.
  // Extract that 16-bit length to avoid having to execute strlen().
  // NOTE: 'StrLenPtr' is an 'unsigned char*' so that we load bytes as
  //  unsigned integers.  This is important to avoid integer overflow when
  //  we cast them to 'unsigned'.
  const unsigned char *StrLenPtr = (const unsigned char*) Str - 2;
  unsigned StrLen = (((unsigned) StrLenPtr[0])
                     | (((unsigned) StrLenPtr[1]) << 8)) - 1;
  auto &II = PP.getIdentifierTable().get(StringRef(Str, StrLen));
  IdentifiersLoaded[ID] = &II;
  markIdentifierFromAST(*this,  II);
  if (DeserializationListener)
    DeserializationListener->IdentifierRead(ID + 1, &II);
}

return IdentifiersLoaded[ID];
8842}

8844IdentifierInfo *ASTReader::getLocalIdentifier(ModuleFile &M, unsigned LocalID) {
return DecodeIdentifierInfo(getGlobalIdentifierID(M, LocalID));
8846}

8848IdentifierID ASTReader::getGlobalIdentifierID(ModuleFile &M, unsigned LocalID) {
if (LocalID < NUM_PREDEF_IDENT_IDS)
  return LocalID;

if (!M.ModuleOffsetMap.empty())
  ReadModuleOffsetMap(M);

ContinuousRangeMap<uint32_t, int, 2>::iterator I
  = M.IdentifierRemap.find(LocalID - NUM_PREDEF_IDENT_IDS);
assert(I != M.IdentifierRemap.end()((I != M.IdentifierRemap.end() && "Invalid index into identifier index remap"
) ? static_cast<void> (0) : __assert_fail ("I != M.IdentifierRemap.end() && \"Invalid index into identifier index remap\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 8858, __PRETTY_FUNCTION__))
       && "Invalid index into identifier index remap")((I != M.IdentifierRemap.end() && "Invalid index into identifier index remap"
) ? static_cast<void> (0) : __assert_fail ("I != M.IdentifierRemap.end() && \"Invalid index into identifier index remap\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 8858, __PRETTY_FUNCTION__));

return LocalID + I->second;
8861}

8863MacroInfo *ASTReader::getMacro(MacroID ID) {
if (ID == 0)
  return nullptr;

if (MacrosLoaded.empty()) {
  Error("no macro table in AST file");
  return nullptr;
}

ID -= NUM_PREDEF_MACRO_IDS;
if (!MacrosLoaded[ID]) {
  GlobalMacroMapType::iterator I
    = GlobalMacroMap.find(ID + NUM_PREDEF_MACRO_IDS);
  assert(I != GlobalMacroMap.end() && "Corrupted global macro map")((I != GlobalMacroMap.end() && "Corrupted global macro map"
) ? static_cast<void> (0) : __assert_fail ("I != GlobalMacroMap.end() && \"Corrupted global macro map\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 8876, __PRETTY_FUNCTION__));
  ModuleFile *M = I->second;
  unsigned Index = ID - M->BaseMacroID;
  MacrosLoaded[ID] = ReadMacroRecord(*M, M->MacroOffsets[Index]);

  if (DeserializationListener)
    DeserializationListener->MacroRead(ID + NUM_PREDEF_MACRO_IDS,
                                       MacrosLoaded[ID]);
}

return MacrosLoaded[ID];
8887}

8889MacroID ASTReader::getGlobalMacroID(ModuleFile &M, unsigned LocalID) {
if (LocalID < NUM_PREDEF_MACRO_IDS)
  return LocalID;

if (!M.ModuleOffsetMap.empty())
  ReadModuleOffsetMap(M);

ContinuousRangeMap<uint32_t, int, 2>::iterator I
  = M.MacroRemap.find(LocalID - NUM_PREDEF_MACRO_IDS);
assert(I != M.MacroRemap.end() && "Invalid index into macro index remap")((I != M.MacroRemap.end() && "Invalid index into macro index remap"
) ? static_cast<void> (0) : __assert_fail ("I != M.MacroRemap.end() && \"Invalid index into macro index remap\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 8898, __PRETTY_FUNCTION__));

return LocalID + I->second;
8901}

8903serialization::SubmoduleID
8904ASTReader::getGlobalSubmoduleID(ModuleFile &M, unsigned LocalID) {
if (LocalID < NUM_PREDEF_SUBMODULE_IDS)
  return LocalID;

if (!M.ModuleOffsetMap.empty())
  ReadModuleOffsetMap(M);

ContinuousRangeMap<uint32_t, int, 2>::iterator I
  = M.SubmoduleRemap.find(LocalID - NUM_PREDEF_SUBMODULE_IDS);
assert(I != M.SubmoduleRemap.end()((I != M.SubmoduleRemap.end() && "Invalid index into submodule index remap"
) ? static_cast<void> (0) : __assert_fail ("I != M.SubmoduleRemap.end() && \"Invalid index into submodule index remap\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 8914, __PRETTY_FUNCTION__))
       && "Invalid index into submodule index remap")((I != M.SubmoduleRemap.end() && "Invalid index into submodule index remap"
) ? static_cast<void> (0) : __assert_fail ("I != M.SubmoduleRemap.end() && \"Invalid index into submodule index remap\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 8914, __PRETTY_FUNCTION__));

return LocalID + I->second;
8917}

8919Module *ASTReader::getSubmodule(SubmoduleID GlobalID) {
if (GlobalID < NUM_PREDEF_SUBMODULE_IDS) {
  assert(GlobalID == 0 && "Unhandled global submodule ID")((GlobalID == 0 && "Unhandled global submodule ID") ?
 static_cast<void> (0) : __assert_fail ("GlobalID == 0 && \"Unhandled global submodule ID\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 8921, __PRETTY_FUNCTION__));
  return nullptr;
}

if (GlobalID > SubmodulesLoaded.size()) {
  Error("submodule ID out of range in AST file");
  return nullptr;
}

return SubmodulesLoaded[GlobalID - NUM_PREDEF_SUBMODULE_IDS];
8931}

8933Module *ASTReader::getModule(unsigned ID) {
return getSubmodule(ID);
8935}

8937bool ASTReader::DeclIsFromPCHWithObjectFile(const Decl *D) {
ModuleFile *MF = getOwningModuleFile(D);
return MF && MF->PCHHasObjectFile;
8940}

8942ModuleFile *ASTReader::getLocalModuleFile(ModuleFile &F, unsigned ID) {
if (ID & 1) {
  // It's a module, look it up by submodule ID.
  auto I = GlobalSubmoduleMap.find(getGlobalSubmoduleID(F, ID >> 1));
  return I == GlobalSubmoduleMap.end() ? nullptr : I->second;
} else {
  // It's a prefix (preamble, PCH, ...). Look it up by index.
  unsigned IndexFromEnd = ID >> 1;
  assert(IndexFromEnd && "got reference to unknown module file")((IndexFromEnd && "got reference to unknown module file"
) ? static_cast<void> (0) : __assert_fail ("IndexFromEnd && \"got reference to unknown module file\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 8950, __PRETTY_FUNCTION__));
  return getModuleManager().pch_modules().end()[-IndexFromEnd];
}
8953}

8955unsigned ASTReader::getModuleFileID(ModuleFile *F) {
if (!F)
  return 1;

// For a file representing a module, use the submodule ID of the top-level
// module as the file ID. For any other kind of file, the number of such
// files loaded beforehand will be the same on reload.
// FIXME: Is this true even if we have an explicit module file and a PCH?
if (F->isModule())
  return ((F->BaseSubmoduleID + NUM_PREDEF_SUBMODULE_IDS) << 1) | 1;

auto PCHModules = getModuleManager().pch_modules();
auto I = llvm::find(PCHModules, F);
assert(I != PCHModules.end() && "emitting reference to unknown file")((I != PCHModules.end() && "emitting reference to unknown file"
) ? static_cast<void> (0) : __assert_fail ("I != PCHModules.end() && \"emitting reference to unknown file\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 8968, __PRETTY_FUNCTION__));
return (I - PCHModules.end()) << 1;
8970}

8972llvm::Optional<ExternalASTSource::ASTSourceDescriptor>
8973ASTReader::getSourceDescriptor(unsigned ID) {
if (const Module *M = getSubmodule(ID))
  return ExternalASTSource::ASTSourceDescriptor(*M);

// If there is only a single PCH, return it instead.
// Chained PCH are not supported.
const auto &PCHChain = ModuleMgr.pch_modules();
if (std::distance(std::begin(PCHChain), std::end(PCHChain))) {
  ModuleFile &MF = ModuleMgr.getPrimaryModule();
  StringRef ModuleName = llvm::sys::path::filename(MF.OriginalSourceFileName);
  StringRef FileName = llvm::sys::path::filename(MF.FileName);
  return ASTReader::ASTSourceDescriptor(ModuleName, MF.OriginalDir, FileName,
                                        MF.Signature);
}
return None;
8988}

8990ExternalASTSource::ExtKind ASTReader::hasExternalDefinitions(const Decl *FD) {
auto I = DefinitionSource.find(FD);
if (I == DefinitionSource.end())
  return EK_ReplyHazy;
return I->second ? EK_Never : EK_Always;
8995}

8997Selector ASTReader::getLocalSelector(ModuleFile &M, unsigned LocalID) {
return DecodeSelector(getGlobalSelectorID(M, LocalID));
8999}

9001Selector ASTReader::DecodeSelector(serialization::SelectorID ID) {
if (ID == 0)
  return Selector();

if (ID > SelectorsLoaded.size()) {
  Error("selector ID out of range in AST file");
  return Selector();
}

if (SelectorsLoaded[ID - 1].getAsOpaquePtr() == nullptr) {
  // Load this selector from the selector table.
  GlobalSelectorMapType::iterator I = GlobalSelectorMap.find(ID);
  assert(I != GlobalSelectorMap.end() && "Corrupted global selector map")((I != GlobalSelectorMap.end() && "Corrupted global selector map"
) ? static_cast<void> (0) : __assert_fail ("I != GlobalSelectorMap.end() && \"Corrupted global selector map\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 9013, __PRETTY_FUNCTION__));
  ModuleFile &M = *I->second;
  ASTSelectorLookupTrait Trait(*this, M);
  unsigned Idx = ID - M.BaseSelectorID - NUM_PREDEF_SELECTOR_IDS;
  SelectorsLoaded[ID - 1] =
    Trait.ReadKey(M.SelectorLookupTableData + M.SelectorOffsets[Idx], 0);
  if (DeserializationListener)
    DeserializationListener->SelectorRead(ID, SelectorsLoaded[ID - 1]);
}

return SelectorsLoaded[ID - 1];
9024}

9026Selector ASTReader::GetExternalSelector(serialization::SelectorID ID) {
return DecodeSelector(ID);
9028}

9030uint32_t ASTReader::GetNumExternalSelectors() {
// ID 0 (the null selector) is considered an external selector.
return getTotalNumSelectors() + 1;
9033}

9035serialization::SelectorID
9036ASTReader::getGlobalSelectorID(ModuleFile &M, unsigned LocalID) const {
if (LocalID < NUM_PREDEF_SELECTOR_IDS)
  return LocalID;

if (!M.ModuleOffsetMap.empty())
  ReadModuleOffsetMap(M);

ContinuousRangeMap<uint32_t, int, 2>::iterator I
  = M.SelectorRemap.find(LocalID - NUM_PREDEF_SELECTOR_IDS);
assert(I != M.SelectorRemap.end()((I != M.SelectorRemap.end() && "Invalid index into selector index remap"
) ? static_cast<void> (0) : __assert_fail ("I != M.SelectorRemap.end() && \"Invalid index into selector index remap\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 9046, __PRETTY_FUNCTION__))
       && "Invalid index into selector index remap")((I != M.SelectorRemap.end() && "Invalid index into selector index remap"
) ? static_cast<void> (0) : __assert_fail ("I != M.SelectorRemap.end() && \"Invalid index into selector index remap\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 9046, __PRETTY_FUNCTION__));

return LocalID + I->second;
9049}

9051DeclarationName
9052ASTReader::ReadDeclarationName(ModuleFile &F,
                             const RecordData &Record, unsigned &Idx) {
ASTContext &Context = getContext();
DeclarationName::NameKind Kind = (DeclarationName::NameKind)Record[Idx++];
switch (Kind) {
case DeclarationName::Identifier:
  return DeclarationName(GetIdentifierInfo(F, Record, Idx));

case DeclarationName::ObjCZeroArgSelector:
case DeclarationName::ObjCOneArgSelector:
case DeclarationName::ObjCMultiArgSelector:
  return DeclarationName(ReadSelector(F, Record, Idx));

case DeclarationName::CXXConstructorName:
  return Context.DeclarationNames.getCXXConstructorName(
                        Context.getCanonicalType(readType(F, Record, Idx)));

case DeclarationName::CXXDestructorName:
  return Context.DeclarationNames.getCXXDestructorName(
                        Context.getCanonicalType(readType(F, Record, Idx)));

case DeclarationName::CXXDeductionGuideName:
  return Context.DeclarationNames.getCXXDeductionGuideName(
                        ReadDeclAs<TemplateDecl>(F, Record, Idx));

case DeclarationName::CXXConversionFunctionName:
  return Context.DeclarationNames.getCXXConversionFunctionName(
                        Context.getCanonicalType(readType(F, Record, Idx)));

case DeclarationName::CXXOperatorName:
  return Context.DeclarationNames.getCXXOperatorName(
                                     (OverloadedOperatorKind)Record[Idx++]);

case DeclarationName::CXXLiteralOperatorName:
  return Context.DeclarationNames.getCXXLiteralOperatorName(
                                     GetIdentifierInfo(F, Record, Idx));

case DeclarationName::CXXUsingDirective:
  return DeclarationName::getUsingDirectiveName();
}

llvm_unreachable("Invalid NameKind!")::llvm::llvm_unreachable_internal("Invalid NameKind!", "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 9093);
9094}

9096void ASTReader::ReadDeclarationNameLoc(ModuleFile &F,
                                     DeclarationNameLoc &DNLoc,
                                     DeclarationName Name,
                                    const RecordData &Record, unsigned &Idx) {
switch (Name.getNameKind()) {
case DeclarationName::CXXConstructorName:
case DeclarationName::CXXDestructorName:
case DeclarationName::CXXConversionFunctionName:
  DNLoc.NamedType.TInfo = GetTypeSourceInfo(F, Record, Idx);
  break;

case DeclarationName::CXXOperatorName:
  DNLoc.CXXOperatorName.BeginOpNameLoc
      = ReadSourceLocation(F, Record, Idx).getRawEncoding();
  DNLoc.CXXOperatorName.EndOpNameLoc
      = ReadSourceLocation(F, Record, Idx).getRawEncoding();
  break;

case DeclarationName::CXXLiteralOperatorName:
  DNLoc.CXXLiteralOperatorName.OpNameLoc
      = ReadSourceLocation(F, Record, Idx).getRawEncoding();
  break;

case DeclarationName::Identifier:
case DeclarationName::ObjCZeroArgSelector:
case DeclarationName::ObjCOneArgSelector:
case DeclarationName::ObjCMultiArgSelector:
case DeclarationName::CXXUsingDirective:
case DeclarationName::CXXDeductionGuideName:
  break;
}
9127}

9129void ASTReader::ReadDeclarationNameInfo(ModuleFile &F,
                                      DeclarationNameInfo &NameInfo,
                                    const RecordData &Record, unsigned &Idx) {
NameInfo.setName(ReadDeclarationName(F, Record, Idx));
NameInfo.setLoc(ReadSourceLocation(F, Record, Idx));
DeclarationNameLoc DNLoc;
ReadDeclarationNameLoc(F, DNLoc, NameInfo.getName(), Record, Idx);
NameInfo.setInfo(DNLoc);
9137}

9139void ASTReader::ReadQualifierInfo(ModuleFile &F, QualifierInfo &Info,
                                const RecordData &Record, unsigned &Idx) {
Info.QualifierLoc = ReadNestedNameSpecifierLoc(F, Record, Idx);
unsigned NumTPLists = Record[Idx++];
Info.NumTemplParamLists = NumTPLists;
if (NumTPLists) {
  Info.TemplParamLists =
      new (getContext()) TemplateParameterList *[NumTPLists];
  for (unsigned i = 0; i != NumTPLists; ++i)
    Info.TemplParamLists[i] = ReadTemplateParameterList(F, Record, Idx);
}
9150}

9152TemplateName
9153ASTReader::ReadTemplateName(ModuleFile &F, const RecordData &Record,
                          unsigned &Idx) {
ASTContext &Context = getContext();
TemplateName::NameKind Kind = (TemplateName::NameKind)Record[Idx++];
switch (Kind) {
case TemplateName::Template:
    return TemplateName(ReadDeclAs<TemplateDecl>(F, Record, Idx));

case TemplateName::OverloadedTemplate: {
  unsigned size = Record[Idx++];
  UnresolvedSet<8> Decls;
  while (size--)
    Decls.addDecl(ReadDeclAs<NamedDecl>(F, Record, Idx));

  return Context.getOverloadedTemplateName(Decls.begin(), Decls.end());
}

case TemplateName::AssumedTemplate: {
  DeclarationName Name = ReadDeclarationName(F, Record, Idx);
  return Context.getAssumedTemplateName(Name);
}

case TemplateName::QualifiedTemplate: {
  NestedNameSpecifier *NNS = ReadNestedNameSpecifier(F, Record, Idx);
  bool hasTemplKeyword = Record[Idx++];
  TemplateDecl *Template = ReadDeclAs<TemplateDecl>(F, Record, Idx);
  return Context.getQualifiedTemplateName(NNS, hasTemplKeyword, Template);
}

case TemplateName::DependentTemplate: {
  NestedNameSpecifier *NNS = ReadNestedNameSpecifier(F, Record, Idx);
  if (Record[Idx++])  // isIdentifier
    return Context.getDependentTemplateName(NNS,
                                             GetIdentifierInfo(F, Record,
                                                               Idx));
  return Context.getDependentTemplateName(NNS,
                                       (OverloadedOperatorKind)Record[Idx++]);
}

case TemplateName::SubstTemplateTemplateParm: {
  TemplateTemplateParmDecl *param
    = ReadDeclAs<TemplateTemplateParmDecl>(F, Record, Idx);
  if (!param) return TemplateName();
  TemplateName replacement = ReadTemplateName(F, Record, Idx);
  return Context.getSubstTemplateTemplateParm(param, replacement);
}

case TemplateName::SubstTemplateTemplateParmPack: {
  TemplateTemplateParmDecl *Param
    = ReadDeclAs<TemplateTemplateParmDecl>(F, Record, Idx);
  if (!Param)
    return TemplateName();

  TemplateArgument ArgPack = ReadTemplateArgument(F, Record, Idx);
  if (ArgPack.getKind() != TemplateArgument::Pack)
    return TemplateName();

  return Context.getSubstTemplateTemplateParmPack(Param, ArgPack);
}
}

llvm_unreachable("Unhandled template name kind!")::llvm::llvm_unreachable_internal("Unhandled template name kind!"
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 9214);
9215}

9217TemplateArgument ASTReader::ReadTemplateArgument(ModuleFile &F,
                                               const RecordData &Record,
                                               unsigned &Idx,
                                               bool Canonicalize) {
ASTContext &Context = getContext();
if (Canonicalize) {
  // The caller wants a canonical template argument. Sometimes the AST only
  // wants template arguments in canonical form (particularly as the template
  // argument lists of template specializations) so ensure we preserve that
  // canonical form across serialization.
  TemplateArgument Arg = ReadTemplateArgument(F, Record, Idx, false);
  return Context.getCanonicalTemplateArgument(Arg);
}

TemplateArgument::ArgKind Kind = (TemplateArgument::ArgKind)Record[Idx++];
switch (Kind) {
case TemplateArgument::Null:
  return TemplateArgument();
case TemplateArgument::Type:
  return TemplateArgument(readType(F, Record, Idx));
case TemplateArgument::Declaration: {
  ValueDecl *D = ReadDeclAs<ValueDecl>(F, Record, Idx);
  return TemplateArgument(D, readType(F, Record, Idx));
}
case TemplateArgument::NullPtr:
  return TemplateArgument(readType(F, Record, Idx), /*isNullPtr*/true);
case TemplateArgument::Integral: {
  llvm::APSInt Value = ReadAPSInt(Record, Idx);
  QualType T = readType(F, Record, Idx);
  return TemplateArgument(Context, Value, T);
}
case TemplateArgument::Template:
  return TemplateArgument(ReadTemplateName(F, Record, Idx));
case TemplateArgument::TemplateExpansion: {
  TemplateName Name = ReadTemplateName(F, Record, Idx);
  Optional<unsigned> NumTemplateExpansions;
  if (unsigned NumExpansions = Record[Idx++])
    NumTemplateExpansions = NumExpansions - 1;
  return TemplateArgument(Name, NumTemplateExpansions);
}
case TemplateArgument::Expression:
  return TemplateArgument(ReadExpr(F));
case TemplateArgument::Pack: {
  unsigned NumArgs = Record[Idx++];
  TemplateArgument *Args = new (Context) TemplateArgument[NumArgs];
  for (unsigned I = 0; I != NumArgs; ++I)
    Args[I] = ReadTemplateArgument(F, Record, Idx);
  return TemplateArgument(llvm::makeArrayRef(Args, NumArgs));
}
}

llvm_unreachable("Unhandled template argument kind!")::llvm::llvm_unreachable_internal("Unhandled template argument kind!"
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 9268);
9269}

9271TemplateParameterList *
9272ASTReader::ReadTemplateParameterList(ModuleFile &F,
                                   const RecordData &Record, unsigned &Idx) {
SourceLocation TemplateLoc = ReadSourceLocation(F, Record, Idx);
SourceLocation LAngleLoc = ReadSourceLocation(F, Record, Idx);
SourceLocation RAngleLoc = ReadSourceLocation(F, Record, Idx);

unsigned NumParams = Record[Idx++];
SmallVector<NamedDecl *, 16> Params;
Params.reserve(NumParams);
while (NumParams--)
  Params.push_back(ReadDeclAs<NamedDecl>(F, Record, Idx));

// TODO: Concepts
TemplateParameterList *TemplateParams = TemplateParameterList::Create(
    getContext(), TemplateLoc, LAngleLoc, Params, RAngleLoc, nullptr);
return TemplateParams;
9288}

9290void
9291ASTReader::
9292ReadTemplateArgumentList(SmallVectorImpl<TemplateArgument> &TemplArgs,
                       ModuleFile &F, const RecordData &Record,
                       unsigned &Idx, bool Canonicalize) {
unsigned NumTemplateArgs = Record[Idx++];
TemplArgs.reserve(NumTemplateArgs);
while (NumTemplateArgs--)
  TemplArgs.push_back(ReadTemplateArgument(F, Record, Idx, Canonicalize));
9299}

9301/// Read a UnresolvedSet structure.
9302void ASTReader::ReadUnresolvedSet(ModuleFile &F, LazyASTUnresolvedSet &Set,
                                const RecordData &Record, unsigned &Idx) {
unsigned NumDecls = Record[Idx++];
Set.reserve(getContext(), NumDecls);
while (NumDecls--) {
  DeclID ID = ReadDeclID(F, Record, Idx);
  AccessSpecifier AS = (AccessSpecifier)Record[Idx++];
  Set.addLazyDecl(getContext(), ID, AS);
}
9311}

9313CXXBaseSpecifier
9314ASTReader::ReadCXXBaseSpecifier(ModuleFile &F,
                              const RecordData &Record, unsigned &Idx) {
bool isVirtual = static_cast<bool>(Record[Idx++]);
bool isBaseOfClass = static_cast<bool>(Record[Idx++]);
AccessSpecifier AS = static_cast<AccessSpecifier>(Record[Idx++]);
bool inheritConstructors = static_cast<bool>(Record[Idx++]);
TypeSourceInfo *TInfo = GetTypeSourceInfo(F, Record, Idx);
SourceRange Range = ReadSourceRange(F, Record, Idx);
SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Idx);
CXXBaseSpecifier Result(Range, isVirtual, isBaseOfClass, AS, TInfo,
                        EllipsisLoc);
Result.setInheritConstructors(inheritConstructors);
return Result;
9327}

9329CXXCtorInitializer **
9330ASTReader::ReadCXXCtorInitializers(ModuleFile &F, const RecordData &Record,
                                 unsigned &Idx) {
ASTContext &Context = getContext();
unsigned NumInitializers = Record[Idx++];
assert(NumInitializers && "wrote ctor initializers but have no inits")((NumInitializers && "wrote ctor initializers but have no inits"
) ? static_cast<void> (0) : __assert_fail ("NumInitializers && \"wrote ctor initializers but have no inits\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 9334, __PRETTY_FUNCTION__));
auto **CtorInitializers = new (Context) CXXCtorInitializer*[NumInitializers];
for (unsigned i = 0; i != NumInitializers; ++i) {
  TypeSourceInfo *TInfo = nullptr;
  bool IsBaseVirtual = false;
  FieldDecl *Member = nullptr;
  IndirectFieldDecl *IndirectMember = nullptr;

  CtorInitializerType Type = (CtorInitializerType)Record[Idx++];
  switch (Type) {
  case CTOR_INITIALIZER_BASE:
    TInfo = GetTypeSourceInfo(F, Record, Idx);
    IsBaseVirtual = Record[Idx++];
    break;

  case CTOR_INITIALIZER_DELEGATING:
    TInfo = GetTypeSourceInfo(F, Record, Idx);
    break;

   case CTOR_INITIALIZER_MEMBER:
    Member = ReadDeclAs<FieldDecl>(F, Record, Idx);
    break;

   case CTOR_INITIALIZER_INDIRECT_MEMBER:
    IndirectMember = ReadDeclAs<IndirectFieldDecl>(F, Record, Idx);
    break;
  }

  SourceLocation MemberOrEllipsisLoc = ReadSourceLocation(F, Record, Idx);
  Expr *Init = ReadExpr(F);
  SourceLocation LParenLoc = ReadSourceLocation(F, Record, Idx);
  SourceLocation RParenLoc = ReadSourceLocation(F, Record, Idx);

  CXXCtorInitializer *BOMInit;
  if (Type == CTOR_INITIALIZER_BASE)
    BOMInit = new (Context)
        CXXCtorInitializer(Context, TInfo, IsBaseVirtual, LParenLoc, Init,
                           RParenLoc, MemberOrEllipsisLoc);
  else if (Type == CTOR_INITIALIZER_DELEGATING)
    BOMInit = new (Context)
        CXXCtorInitializer(Context, TInfo, LParenLoc, Init, RParenLoc);
  else if (Member)
    BOMInit = new (Context)
        CXXCtorInitializer(Context, Member, MemberOrEllipsisLoc, LParenLoc,
                           Init, RParenLoc);
  else
    BOMInit = new (Context)
        CXXCtorInitializer(Context, IndirectMember, MemberOrEllipsisLoc,
                           LParenLoc, Init, RParenLoc);

  if (/*IsWritten*/Record[Idx++]) {
    unsigned SourceOrder = Record[Idx++];
    BOMInit->setSourceOrder(SourceOrder);
  }

  CtorInitializers[i] = BOMInit;
}

return CtorInitializers;
9393}

9395NestedNameSpecifier *
9396ASTReader::ReadNestedNameSpecifier(ModuleFile &F,
                                 const RecordData &Record, unsigned &Idx) {
ASTContext &Context = getContext();
unsigned N = Record[Idx++];
NestedNameSpecifier *NNS = nullptr, *Prev = nullptr;
for (unsigned I = 0; I != N; ++I) {
  NestedNameSpecifier::SpecifierKind Kind
    = (NestedNameSpecifier::SpecifierKind)Record[Idx++];
  switch (Kind) {
  case NestedNameSpecifier::Identifier: {
    IdentifierInfo *II = GetIdentifierInfo(F, Record, Idx);
    NNS = NestedNameSpecifier::Create(Context, Prev, II);
    break;
  }

  case NestedNameSpecifier::Namespace: {
    NamespaceDecl *NS = ReadDeclAs<NamespaceDecl>(F, Record, Idx);
    NNS = NestedNameSpecifier::Create(Context, Prev, NS);
    break;
  }

  case NestedNameSpecifier::NamespaceAlias: {
    NamespaceAliasDecl *Alias =ReadDeclAs<NamespaceAliasDecl>(F, Record, Idx);
    NNS = NestedNameSpecifier::Create(Context, Prev, Alias);
    break;
  }

  case NestedNameSpecifier::TypeSpec:
  case NestedNameSpecifier::TypeSpecWithTemplate: {
    const Type *T = readType(F, Record, Idx).getTypePtrOrNull();
    if (!T)
      return nullptr;

    bool Template = Record[Idx++];
    NNS = NestedNameSpecifier::Create(Context, Prev, Template, T);
    break;
  }

  case NestedNameSpecifier::Global:
    NNS = NestedNameSpecifier::GlobalSpecifier(Context);
    // No associated value, and there can't be a prefix.
    break;

  case NestedNameSpecifier::Super: {
    CXXRecordDecl *RD = ReadDeclAs<CXXRecordDecl>(F, Record, Idx);
    NNS = NestedNameSpecifier::SuperSpecifier(Context, RD);
    break;
  }
  }
  Prev = NNS;
}
return NNS;
9448}

9450NestedNameSpecifierLoc
9451ASTReader::ReadNestedNameSpecifierLoc(ModuleFile &F, const RecordData &Record,
                                    unsigned &Idx) {
ASTContext &Context = getContext();
unsigned N = Record[Idx++];
NestedNameSpecifierLocBuilder Builder;
for (unsigned I = 0; I != N; ++I) {
  NestedNameSpecifier::SpecifierKind Kind
    = (NestedNameSpecifier::SpecifierKind)Record[Idx++];
  switch (Kind) {
  case NestedNameSpecifier::Identifier: {
    IdentifierInfo *II = GetIdentifierInfo(F, Record, Idx);
    SourceRange Range = ReadSourceRange(F, Record, Idx);
    Builder.Extend(Context, II, Range.getBegin(), Range.getEnd());
    break;
  }

  case NestedNameSpecifier::Namespace: {
    NamespaceDecl *NS = ReadDeclAs<NamespaceDecl>(F, Record, Idx);
    SourceRange Range = ReadSourceRange(F, Record, Idx);
    Builder.Extend(Context, NS, Range.getBegin(), Range.getEnd());
    break;
  }

  case NestedNameSpecifier::NamespaceAlias: {
    NamespaceAliasDecl *Alias =ReadDeclAs<NamespaceAliasDecl>(F, Record, Idx);
    SourceRange Range = ReadSourceRange(F, Record, Idx);
    Builder.Extend(Context, Alias, Range.getBegin(), Range.getEnd());
    break;
  }

  case NestedNameSpecifier::TypeSpec:
  case NestedNameSpecifier::TypeSpecWithTemplate: {
    bool Template = Record[Idx++];
    TypeSourceInfo *T = GetTypeSourceInfo(F, Record, Idx);
    if (!T)
      return NestedNameSpecifierLoc();
    SourceLocation ColonColonLoc = ReadSourceLocation(F, Record, Idx);

    // FIXME: 'template' keyword location not saved anywhere, so we fake it.
    Builder.Extend(Context,
                   Template? T->getTypeLoc().getBeginLoc() : SourceLocation(),
                   T->getTypeLoc(), ColonColonLoc);
    break;
  }

  case NestedNameSpecifier::Global: {
    SourceLocation ColonColonLoc = ReadSourceLocation(F, Record, Idx);
    Builder.MakeGlobal(Context, ColonColonLoc);
    break;
  }

  case NestedNameSpecifier::Super: {
    CXXRecordDecl *RD = ReadDeclAs<CXXRecordDecl>(F, Record, Idx);
    SourceRange Range = ReadSourceRange(F, Record, Idx);
    Builder.MakeSuper(Context, RD, Range.getBegin(), Range.getEnd());
    break;
  }
  }
}

return Builder.getWithLocInContext(Context);
9512}

9514SourceRange
9515ASTReader::ReadSourceRange(ModuleFile &F, const RecordData &Record,
                         unsigned &Idx) {
SourceLocation beg = ReadSourceLocation(F, Record, Idx);
SourceLocation end = ReadSourceLocation(F, Record, Idx);
return SourceRange(beg, end);
9520}

9522static FixedPointSemantics
9523ReadFixedPointSemantics(const SmallVectorImpl<uint64_t> &Record,
                      unsigned &Idx) {
unsigned Width = Record[Idx++];
unsigned Scale = Record[Idx++];
uint64_t Tmp = Record[Idx++];
bool IsSigned = Tmp & 0x1;
bool IsSaturated = Tmp & 0x2;
bool HasUnsignedPadding = Tmp & 0x4;
return FixedPointSemantics(Width, Scale, IsSigned, IsSaturated,
                           HasUnsignedPadding);
9533}

9535APValue ASTReader::ReadAPValue(const RecordData &Record, unsigned &Idx) {
unsigned Kind = Record[Idx++];
switch (Kind) {
case APValue::None:
  return APValue();
case APValue::Indeterminate:
  return APValue::IndeterminateValue();
case APValue::Int:
  return APValue(ReadAPSInt(Record, Idx));
case APValue::Float: {
  const llvm::fltSemantics &FloatSema = llvm::APFloatBase::EnumToSemantics(
      static_cast<llvm::APFloatBase::Semantics>(Record[Idx++]));
  return APValue(ReadAPFloat(Record, FloatSema, Idx));
}
case APValue::FixedPoint: {
  FixedPointSemantics FPSema = ReadFixedPointSemantics(Record, Idx);
  return APValue(APFixedPoint(ReadAPInt(Record, Idx), FPSema));
}
case APValue::ComplexInt: {
  llvm::APSInt First = ReadAPSInt(Record, Idx);
  return APValue(std::move(First), ReadAPSInt(Record, Idx));
}
case APValue::ComplexFloat: {
  const llvm::fltSemantics &FloatSema1 = llvm::APFloatBase::EnumToSemantics(
      static_cast<llvm::APFloatBase::Semantics>(Record[Idx++]));
  llvm::APFloat First = ReadAPFloat(Record, FloatSema1, Idx);
  const llvm::fltSemantics &FloatSema2 = llvm::APFloatBase::EnumToSemantics(
      static_cast<llvm::APFloatBase::Semantics>(Record[Idx++]));
  return APValue(std::move(First), ReadAPFloat(Record, FloatSema2, Idx));
}
case APValue::LValue:
case APValue::Vector:
case APValue::Array:
case APValue::Struct:
case APValue::Union:
case APValue::MemberPointer:
case APValue::AddrLabelDiff:
  // TODO : Handle all these APValue::ValueKind.
  return APValue();
}
llvm_unreachable("Invalid APValue::ValueKind")::llvm::llvm_unreachable_internal("Invalid APValue::ValueKind"
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 9575);
9576}

9578/// Read an integral value
9579llvm::APInt ASTReader::ReadAPInt(const RecordData &Record, unsigned &Idx) {
unsigned BitWidth = Record[Idx++];
unsigned NumWords = llvm::APInt::getNumWords(BitWidth);
llvm::APInt Result(BitWidth, NumWords, &Record[Idx]);
Idx += NumWords;
return Result;
9585}

9587/// Read a signed integral value
9588llvm::APSInt ASTReader::ReadAPSInt(const RecordData &Record, unsigned &Idx) {
bool isUnsigned = Record[Idx++];
return llvm::APSInt(ReadAPInt(Record, Idx), isUnsigned);
9591}

9593/// Read a floating-point value
9594llvm::APFloat ASTReader::ReadAPFloat(const RecordData &Record,
                                   const llvm::fltSemantics &Sem,
                                   unsigned &Idx) {
return llvm::APFloat(Sem, ReadAPInt(Record, Idx));
9598}

9600// Read a string
9601std::string ASTReader::ReadString(const RecordData &Record, unsigned &Idx) {
unsigned Len = Record[Idx++];
std::string Result(Record.data() + Idx, Record.data() + Idx + Len);
Idx += Len;
return Result;
9606}

9608std::string ASTReader::ReadPath(ModuleFile &F, const RecordData &Record,
                              unsigned &Idx) {
std::string Filename = ReadString(Record, Idx);
ResolveImportedPath(F, Filename);
return Filename;
9613}

9615std::string ASTReader::ReadPath(StringRef BaseDirectory,
                              const RecordData &Record, unsigned &Idx) {
std::string Filename = ReadString(Record, Idx);
if (!BaseDirectory.empty())
  ResolveImportedPath(Filename, BaseDirectory);
return Filename;
9621}

9623VersionTuple ASTReader::ReadVersionTuple(const RecordData &Record,
                                       unsigned &Idx) {
unsigned Major = Record[Idx++];
unsigned Minor = Record[Idx++];
unsigned Subminor = Record[Idx++];
if (Minor == 0)
  return VersionTuple(Major);
if (Subminor == 0)
  return VersionTuple(Major, Minor - 1);
return VersionTuple(Major, Minor - 1, Subminor - 1);
9633}

9635CXXTemporary *ASTReader::ReadCXXTemporary(ModuleFile &F,
                                        const RecordData &Record,
                                        unsigned &Idx) {
CXXDestructorDecl *Decl = ReadDeclAs<CXXDestructorDecl>(F, Record, Idx);
return CXXTemporary::Create(getContext(), Decl);
9640}

9642DiagnosticBuilder ASTReader::Diag(unsigned DiagID) const {
return Diag(CurrentImportLoc, DiagID);
9644}

9646DiagnosticBuilder ASTReader::Diag(SourceLocation Loc, unsigned DiagID) const {
return Diags.Report(Loc, DiagID);
9648}

9650/// Retrieve the identifier table associated with the
9651/// preprocessor.
9652IdentifierTable &ASTReader::getIdentifierTable() {
return PP.getIdentifierTable();
9654}

9656/// Record that the given ID maps to the given switch-case
9657/// statement.
9658void ASTReader::RecordSwitchCaseID(SwitchCase *SC, unsigned ID) {
assert((*CurrSwitchCaseStmts)[ID] == nullptr &&(((*CurrSwitchCaseStmts)[ID] == nullptr && "Already have a SwitchCase with this ID"
) ? static_cast<void> (0) : __assert_fail ("(*CurrSwitchCaseStmts)[ID] == nullptr && \"Already have a SwitchCase with this ID\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 9660, __PRETTY_FUNCTION__))
       "Already have a SwitchCase with this ID")(((*CurrSwitchCaseStmts)[ID] == nullptr && "Already have a SwitchCase with this ID"
) ? static_cast<void> (0) : __assert_fail ("(*CurrSwitchCaseStmts)[ID] == nullptr && \"Already have a SwitchCase with this ID\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 9660, __PRETTY_FUNCTION__));
(*CurrSwitchCaseStmts)[ID] = SC;
9662}

9664/// Retrieve the switch-case statement with the given ID.
9665SwitchCase *ASTReader::getSwitchCaseWithID(unsigned ID) {
assert((*CurrSwitchCaseStmts)[ID] != nullptr && "No SwitchCase with this ID")(((*CurrSwitchCaseStmts)[ID] != nullptr && "No SwitchCase with this ID"
) ? static_cast<void> (0) : __assert_fail ("(*CurrSwitchCaseStmts)[ID] != nullptr && \"No SwitchCase with this ID\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 9666, __PRETTY_FUNCTION__));
return (*CurrSwitchCaseStmts)[ID];
9668}

9670void ASTReader::ClearSwitchCaseIDs() {
CurrSwitchCaseStmts->clear();
9672}

9674void ASTReader::ReadComments() {
ASTContext &Context = getContext();
std::vector<RawComment *> Comments;
for (SmallVectorImpl<std::pair<BitstreamCursor,
                               serialization::ModuleFile *>>::iterator
     I = CommentsCursors.begin(),
     E = CommentsCursors.end();
     I != E; ++I) {
  Comments.clear();
  BitstreamCursor &Cursor = I->first;
  serialization::ModuleFile &F = *I->second;
  SavedStreamPosition SavedPosition(Cursor);

  RecordData Record;
  while (true) {
    Expected<llvm::BitstreamEntry> MaybeEntry =
        Cursor.advanceSkippingSubblocks(
            BitstreamCursor::AF_DontPopBlockAtEnd);
    if (!MaybeEntry) {
      Error(MaybeEntry.takeError());
      return;
    }
    llvm::BitstreamEntry Entry = MaybeEntry.get();

    switch (Entry.Kind) {
    case llvm::BitstreamEntry::SubBlock: // Handled for us already.
    case llvm::BitstreamEntry::Error:
      Error("malformed block record in AST file");
      return;
    case llvm::BitstreamEntry::EndBlock:
      goto NextCursor;
    case llvm::BitstreamEntry::Record:
      // The interesting case.
      break;
    }

    // Read a record.
    Record.clear();
    Expected<unsigned> MaybeComment = Cursor.readRecord(Entry.ID, Record);
    if (!MaybeComment) {
      Error(MaybeComment.takeError());
      return;
    }
    switch ((CommentRecordTypes)MaybeComment.get()) {
    case COMMENTS_RAW_COMMENT: {
      unsigned Idx = 0;
      SourceRange SR = ReadSourceRange(F, Record, Idx);
      RawComment::CommentKind Kind =
          (RawComment::CommentKind) Record[Idx++];
      bool IsTrailingComment = Record[Idx++];
      bool IsAlmostTrailingComment = Record[Idx++];
      Comments.push_back(new (Context) RawComment(
          SR, Kind, IsTrailingComment, IsAlmostTrailingComment));
      break;
    }
    }
  }
NextCursor:
  llvm::DenseMap<FileID, std::map<unsigned, RawComment *>>
      FileToOffsetToComment;
  for (RawComment *C : Comments) {
    SourceLocation CommentLoc = C->getBeginLoc();
    if (CommentLoc.isValid()) {
      std::pair<FileID, unsigned> Loc =
          SourceMgr.getDecomposedLoc(CommentLoc);
      if (Loc.first.isValid())
        Context.Comments.OrderedComments[Loc.first].emplace(Loc.second, C);
    }
  }
}
9744}

9746void ASTReader::visitInputFiles(serialization::ModuleFile &MF,
                              bool IncludeSystem, bool Complain,
                  llvm::function_ref<void(const serialization::InputFile &IF,
                                          bool isSystem)> Visitor) {
unsigned NumUserInputs = MF.NumUserInputFiles;
unsigned NumInputs = MF.InputFilesLoaded.size();
assert(NumUserInputs <= NumInputs)((NumUserInputs <= NumInputs) ? static_cast<void> (0
) : __assert_fail ("NumUserInputs <= NumInputs", "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 9752, __PRETTY_FUNCTION__));
unsigned N = IncludeSystem ? NumInputs : NumUserInputs;
for (unsigned I = 0; I < N; ++I) {
  bool IsSystem = I >= NumUserInputs;
  InputFile IF = getInputFile(MF, I+1, Complain);
  Visitor(IF, IsSystem);
}
9759}

9761void ASTReader::visitTopLevelModuleMaps(
  serialization::ModuleFile &MF,
  llvm::function_ref<void(const FileEntry *FE)> Visitor) {
unsigned NumInputs = MF.InputFilesLoaded.size();
for (unsigned I = 0; I < NumInputs; ++I) {
  InputFileInfo IFI = readInputFileInfo(MF, I + 1);
  if (IFI.TopLevelModuleMap)
    // FIXME: This unnecessarily re-reads the InputFileInfo.
    if (auto *FE = getInputFile(MF, I + 1).getFile())
      Visitor(FE);
}
9772}

9774std::string ASTReader::getOwningModuleNameForDiagnostic(const Decl *D) {
// If we know the owning module, use it.
if (Module *M = D->getImportedOwningModule())
  return M->getFullModuleName();

// Otherwise, use the name of the top-level module the decl is within.
if (ModuleFile *M = getOwningModuleFile(D))
  return M->ModuleName;

// Not from a module.
return {};
9785}

9787void ASTReader::finishPendingActions() {
while (!PendingIdentifierInfos.empty() || !PendingFunctionTypes.empty() ||
       !PendingIncompleteDeclChains.empty() || !PendingDeclChains.empty() ||
       !PendingMacroIDs.empty() || !PendingDeclContextInfos.empty() ||
       !PendingUpdateRecords.empty()) {
  // If any identifiers with corresponding top-level declarations have
  // been loaded, load those declarations now.
  using TopLevelDeclsMap =
      llvm::DenseMap<IdentifierInfo *, SmallVector<Decl *, 2>>;
  TopLevelDeclsMap TopLevelDecls;

  while (!PendingIdentifierInfos.empty()) {
    IdentifierInfo *II = PendingIdentifierInfos.back().first;
    SmallVector<uint32_t, 4> DeclIDs =
        std::move(PendingIdentifierInfos.back().second);
    PendingIdentifierInfos.pop_back();

    SetGloballyVisibleDecls(II, DeclIDs, &TopLevelDecls[II]);
  }

  // Load each function type that we deferred loading because it was a
  // deduced type that might refer to a local type declared within itself.
  for (unsigned I = 0; I != PendingFunctionTypes.size(); ++I) {
    auto *FD = PendingFunctionTypes[I].first;
    FD->setType(GetType(PendingFunctionTypes[I].second));

    // If we gave a function a deduced return type, remember that we need to
    // propagate that along the redeclaration chain.
    auto *DT = FD->getReturnType()->getContainedDeducedType();
    if (DT && DT->isDeduced())
      PendingDeducedTypeUpdates.insert(
          {FD->getCanonicalDecl(), FD->getReturnType()});
  }
  PendingFunctionTypes.clear();

  // For each decl chain that we wanted to complete while deserializing, mark
  // it as "still needs to be completed".
  for (unsigned I = 0; I != PendingIncompleteDeclChains.size(); ++I) {
    markIncompleteDeclChain(PendingIncompleteDeclChains[I]);
  }
  PendingIncompleteDeclChains.clear();

  // Load pending declaration chains.
  for (unsigned I = 0; I != PendingDeclChains.size(); ++I)
    loadPendingDeclChain(PendingDeclChains[I].first,
                         PendingDeclChains[I].second);
  PendingDeclChains.clear();

  // Make the most recent of the top-level declarations visible.
  for (TopLevelDeclsMap::iterator TLD = TopLevelDecls.begin(),
         TLDEnd = TopLevelDecls.end(); TLD != TLDEnd; ++TLD) {
    IdentifierInfo *II = TLD->first;
    for (unsigned I = 0, N = TLD->second.size(); I != N; ++I) {
      pushExternalDeclIntoScope(cast<NamedDecl>(TLD->second[I]), II);
    }
  }

  // Load any pending macro definitions.
  for (unsigned I = 0; I != PendingMacroIDs.size(); ++I) {
    IdentifierInfo *II = PendingMacroIDs.begin()[I].first;
    SmallVector<PendingMacroInfo, 2> GlobalIDs;
    GlobalIDs.swap(PendingMacroIDs.begin()[I].second);
    // Initialize the macro history from chained-PCHs ahead of module imports.
    for (unsigned IDIdx = 0, NumIDs = GlobalIDs.size(); IDIdx != NumIDs;
         ++IDIdx) {
      const PendingMacroInfo &Info = GlobalIDs[IDIdx];
      if (!Info.M->isModule())
        resolvePendingMacro(II, Info);
    }
    // Handle module imports.
    for (unsigned IDIdx = 0, NumIDs = GlobalIDs.size(); IDIdx != NumIDs;
         ++IDIdx) {
      const PendingMacroInfo &Info = GlobalIDs[IDIdx];
      if (Info.M->isModule())
        resolvePendingMacro(II, Info);
    }
  }
  PendingMacroIDs.clear();

  // Wire up the DeclContexts for Decls that we delayed setting until
  // recursive loading is completed.
  while (!PendingDeclContextInfos.empty()) {
    PendingDeclContextInfo Info = PendingDeclContextInfos.front();
    PendingDeclContextInfos.pop_front();
    DeclContext *SemaDC = cast<DeclContext>(GetDecl(Info.SemaDC));
    DeclContext *LexicalDC = cast<DeclContext>(GetDecl(Info.LexicalDC));
    Info.D->setDeclContextsImpl(SemaDC, LexicalDC, getContext());
  }

  // Perform any pending declaration updates.
  while (!PendingUpdateRecords.empty()) {
    auto Update = PendingUpdateRecords.pop_back_val();
    ReadingKindTracker ReadingKind(Read_Decl, *this);
    loadDeclUpdateRecords(Update);
  }
}

// At this point, all update records for loaded decls are in place, so any
// fake class definitions should have become real.
assert(PendingFakeDefinitionData.empty() &&((PendingFakeDefinitionData.empty() && "faked up a class definition but never saw the real one"
) ? static_cast<void> (0) : __assert_fail ("PendingFakeDefinitionData.empty() && \"faked up a class definition but never saw the real one\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 9887, __PRETTY_FUNCTION__))
       "faked up a class definition but never saw the real one")((PendingFakeDefinitionData.empty() && "faked up a class definition but never saw the real one"
) ? static_cast<void> (0) : __assert_fail ("PendingFakeDefinitionData.empty() && \"faked up a class definition but never saw the real one\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 9887, __PRETTY_FUNCTION__));

// If we deserialized any C++ or Objective-C class definitions, any
// Objective-C protocol definitions, or any redeclarable templates, make sure
// that all redeclarations point to the definitions. Note that this can only
// happen now, after the redeclaration chains have been fully wired.
for (Decl *D : PendingDefinitions) {
  if (TagDecl *TD = dyn_cast<TagDecl>(D)) {
    if (const TagType *TagT = dyn_cast<TagType>(TD->getTypeForDecl())) {
      // Make sure that the TagType points at the definition.
      const_cast<TagType*>(TagT)->decl = TD;
    }

    if (auto RD = dyn_cast<CXXRecordDecl>(D)) {
      for (auto *R = getMostRecentExistingDecl(RD); R;
           R = R->getPreviousDecl()) {
        assert((R == D) ==(((R == D) == cast<CXXRecordDecl>(R)->isThisDeclarationADefinition
() && "declaration thinks it's the definition but it isn't"
) ? static_cast<void> (0) : __assert_fail ("(R == D) == cast<CXXRecordDecl>(R)->isThisDeclarationADefinition() && \"declaration thinks it's the definition but it isn't\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 9905, __PRETTY_FUNCTION__))
                   cast<CXXRecordDecl>(R)->isThisDeclarationADefinition() &&(((R == D) == cast<CXXRecordDecl>(R)->isThisDeclarationADefinition
() && "declaration thinks it's the definition but it isn't"
) ? static_cast<void> (0) : __assert_fail ("(R == D) == cast<CXXRecordDecl>(R)->isThisDeclarationADefinition() && \"declaration thinks it's the definition but it isn't\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 9905, __PRETTY_FUNCTION__))
               "declaration thinks it's the definition but it isn't")(((R == D) == cast<CXXRecordDecl>(R)->isThisDeclarationADefinition
() && "declaration thinks it's the definition but it isn't"
) ? static_cast<void> (0) : __assert_fail ("(R == D) == cast<CXXRecordDecl>(R)->isThisDeclarationADefinition() && \"declaration thinks it's the definition but it isn't\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 9905, __PRETTY_FUNCTION__));
        cast<CXXRecordDecl>(R)->DefinitionData = RD->DefinitionData;
      }
    }

    continue;
  }

  if (auto ID = dyn_cast<ObjCInterfaceDecl>(D)) {
    // Make sure that the ObjCInterfaceType points at the definition.
    const_cast<ObjCInterfaceType *>(cast<ObjCInterfaceType>(ID->TypeForDecl))
      ->Decl = ID;

    for (auto *R = getMostRecentExistingDecl(ID); R; R = R->getPreviousDecl())
      cast<ObjCInterfaceDecl>(R)->Data = ID->Data;

    continue;
  }

  if (auto PD = dyn_cast<ObjCProtocolDecl>(D)) {
    for (auto *R = getMostRecentExistingDecl(PD); R; R = R->getPreviousDecl())
      cast<ObjCProtocolDecl>(R)->Data = PD->Data;

    continue;
  }

  auto RTD = cast<RedeclarableTemplateDecl>(D)->getCanonicalDecl();
  for (auto *R = getMostRecentExistingDecl(RTD); R; R = R->getPreviousDecl())
    cast<RedeclarableTemplateDecl>(R)->Common = RTD->Common;
}
PendingDefinitions.clear();

// Load the bodies of any functions or methods we've encountered. We do
// this now (delayed) so that we can be sure that the declaration chains
// have been fully wired up (hasBody relies on this).
// FIXME: We shouldn't require complete redeclaration chains here.
for (PendingBodiesMap::iterator PB = PendingBodies.begin(),
                             PBEnd = PendingBodies.end();
     PB != PBEnd; ++PB) {
  if (FunctionDecl *FD = dyn_cast<FunctionDecl>(PB->first)) {
    // For a function defined inline within a class template, force the
    // canonical definition to be the one inside the canonical definition of
    // the template. This ensures that we instantiate from a correct view
    // of the template.
    //
    // Sadly we can't do this more generally: we can't be sure that all
    // copies of an arbitrary class definition will have the same members
    // defined (eg, some member functions may not be instantiated, and some
    // special members may or may not have been implicitly defined).
    if (auto *RD = dyn_cast<CXXRecordDecl>(FD->getLexicalParent()))
      if (RD->isDependentContext() && !RD->isThisDeclarationADefinition())
        continue;

    // FIXME: Check for =delete/=default?
    // FIXME: Complain about ODR violations here?
    const FunctionDecl *Defn = nullptr;
    if (!getContext().getLangOpts().Modules || !FD->hasBody(Defn)) {
      FD->setLazyBody(PB->second);
    } else {
      auto *NonConstDefn = const_cast<FunctionDecl*>(Defn);
      mergeDefinitionVisibility(NonConstDefn, FD);

      if (!FD->isLateTemplateParsed() &&
          !NonConstDefn->isLateTemplateParsed() &&
          FD->getODRHash() != NonConstDefn->getODRHash()) {
        if (!isa<CXXMethodDecl>(FD)) {
          PendingFunctionOdrMergeFailures[FD].push_back(NonConstDefn);
        } else if (FD->getLexicalParent()->isFileContext() &&
                   NonConstDefn->getLexicalParent()->isFileContext()) {
          // Only diagnose out-of-line method definitions.  If they are
          // in class definitions, then an error will be generated when
          // processing the class bodies.
          PendingFunctionOdrMergeFailures[FD].push_back(NonConstDefn);
        }
      }
    }
    continue;
  }

  ObjCMethodDecl *MD = cast<ObjCMethodDecl>(PB->first);
  if (!getContext().getLangOpts().Modules || !MD->hasBody())
    MD->setLazyBody(PB->second);
}
PendingBodies.clear();

// Do some cleanup.
for (auto *ND : PendingMergedDefinitionsToDeduplicate)
  getContext().deduplicateMergedDefinitonsFor(ND);
PendingMergedDefinitionsToDeduplicate.clear();
9994}

9996void ASTReader::diagnoseOdrViolations() {
if (PendingOdrMergeFailures.empty() && PendingOdrMergeChecks.empty() &&
    PendingFunctionOdrMergeFailures.empty() &&
    PendingEnumOdrMergeFailures.empty())
  return;

// Trigger the import of the full definition of each class that had any
// odr-merging problems, so we can produce better diagnostics for them.
// These updates may in turn find and diagnose some ODR failures, so take
// ownership of the set first.
auto OdrMergeFailures = std::move(PendingOdrMergeFailures);
PendingOdrMergeFailures.clear();
for (auto &Merge : OdrMergeFailures) {
  Merge.first->buildLookup();
  Merge.first->decls_begin();
  Merge.first->bases_begin();
  Merge.first->vbases_begin();
  for (auto &RecordPair : Merge.second) {
    auto *RD = RecordPair.first;
    RD->decls_begin();
    RD->bases_begin();
    RD->vbases_begin();
  }
}

// Trigger the import of functions.
auto FunctionOdrMergeFailures = std::move(PendingFunctionOdrMergeFailures);
PendingFunctionOdrMergeFailures.clear();
for (auto &Merge : FunctionOdrMergeFailures) {
  Merge.first->buildLookup();
  Merge.first->decls_begin();
  Merge.first->getBody();
  for (auto &FD : Merge.second) {
    FD->buildLookup();
    FD->decls_begin();
    FD->getBody();
  }
}

// Trigger the import of enums.
auto EnumOdrMergeFailures = std::move(PendingEnumOdrMergeFailures);
PendingEnumOdrMergeFailures.clear();
for (auto &Merge : EnumOdrMergeFailures) {
  Merge.first->decls_begin();
  for (auto &Enum : Merge.second) {
    Enum->decls_begin();
  }
}

// For each declaration from a merged context, check that the canonical
// definition of that context also contains a declaration of the same
// entity.
//
// Caution: this loop does things that might invalidate iterators into
// PendingOdrMergeChecks. Don't turn this into a range-based for loop!
while (!PendingOdrMergeChecks.empty()) {
  NamedDecl *D = PendingOdrMergeChecks.pop_back_val();

  // FIXME: Skip over implicit declarations for now. This matters for things
  // like implicitly-declared special member functions. This isn't entirely
  // correct; we can end up with multiple unmerged declarations of the same
  // implicit entity.
  if (D->isImplicit())
    continue;

  DeclContext *CanonDef = D->getDeclContext();

  bool Found = false;
  const Decl *DCanon = D->getCanonicalDecl();

  for (auto RI : D->redecls()) {
    if (RI->getLexicalDeclContext() == CanonDef) {
      Found = true;
      break;
    }
  }
  if (Found)
    continue;

  // Quick check failed, time to do the slow thing. Note, we can't just
  // look up the name of D in CanonDef here, because the member that is
  // in CanonDef might not be found by name lookup (it might have been
  // replaced by a more recent declaration in the lookup table), and we
  // can't necessarily find it in the redeclaration chain because it might
  // be merely mergeable, not redeclarable.
  llvm::SmallVector<const NamedDecl*, 4> Candidates;
  for (auto *CanonMember : CanonDef->decls()) {
    if (CanonMember->getCanonicalDecl() == DCanon) {
      // This can happen if the declaration is merely mergeable and not
      // actually redeclarable (we looked for redeclarations earlier).
      //
      // FIXME: We should be able to detect this more efficiently, without
      // pulling in all of the members of CanonDef.
      Found = true;
      break;
    }
    if (auto *ND = dyn_cast<NamedDecl>(CanonMember))
      if (ND->getDeclName() == D->getDeclName())
        Candidates.push_back(ND);
  }

  if (!Found) {
    // The AST doesn't like TagDecls becoming invalid after they've been
    // completed. We only really need to mark FieldDecls as invalid here.
    if (!isa<TagDecl>(D))
      D->setInvalidDecl();

    // Ensure we don't accidentally recursively enter deserialization while
    // we're producing our diagnostic.
    Deserializing RecursionGuard(this);

    std::string CanonDefModule =
        getOwningModuleNameForDiagnostic(cast<Decl>(CanonDef));
    Diag(D->getLocation(), diag::err_module_odr_violation_missing_decl)
      << D << getOwningModuleNameForDiagnostic(D)
      << CanonDef << CanonDefModule.empty() << CanonDefModule;

    if (Candidates.empty())
      Diag(cast<Decl>(CanonDef)->getLocation(),
           diag::note_module_odr_violation_no_possible_decls) << D;
    else {
      for (unsigned I = 0, N = Candidates.size(); I != N; ++I)
        Diag(Candidates[I]->getLocation(),
             diag::note_module_odr_violation_possible_decl)
          << Candidates[I];
    }

    DiagnosedOdrMergeFailures.insert(CanonDef);
  }
}

if (OdrMergeFailures.empty() && FunctionOdrMergeFailures.empty() &&
    EnumOdrMergeFailures.empty())
  return;

// Ensure we don't accidentally recursively enter deserialization while
// we're producing our diagnostics.
Deserializing RecursionGuard(this);

// Common code for hashing helpers.
ODRHash Hash;
auto ComputeQualTypeODRHash = [&Hash](QualType Ty) {
  Hash.clear();
  Hash.AddQualType(Ty);
  return Hash.CalculateHash();
};

auto ComputeODRHash = [&Hash](const Stmt *S) {
  assert(S)((S) ? static_cast<void> (0) : __assert_fail ("S", "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 10144, __PRETTY_FUNCTION__));
  Hash.clear();
  Hash.AddStmt(S);
  return Hash.CalculateHash();
};

auto ComputeSubDeclODRHash = [&Hash](const Decl *D) {
  assert(D)((D) ? static_cast<void> (0) : __assert_fail ("D", "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 10151, __PRETTY_FUNCTION__));
  Hash.clear();
  Hash.AddSubDecl(D);
  return Hash.CalculateHash();
};

auto ComputeTemplateArgumentODRHash = [&Hash](const TemplateArgument &TA) {
  Hash.clear();
  Hash.AddTemplateArgument(TA);
  return Hash.CalculateHash();
};

auto ComputeTemplateParameterListODRHash =
    [&Hash](const TemplateParameterList *TPL) {
      assert(TPL)((TPL) ? static_cast<void> (0) : __assert_fail ("TPL", "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 10165, __PRETTY_FUNCTION__));
      Hash.clear();
      Hash.AddTemplateParameterList(TPL);
      return Hash.CalculateHash();
    };

// Issue any pending ODR-failure diagnostics.
for (auto &Merge : OdrMergeFailures) {
  // If we've already pointed out a specific problem with this class, don't
  // bother issuing a general "something's different" diagnostic.
  if (!DiagnosedOdrMergeFailures.insert(Merge.first).second)
    continue;

  bool Diagnosed = false;
  CXXRecordDecl *FirstRecord = Merge.first;
  std::string FirstModule = getOwningModuleNameForDiagnostic(FirstRecord);
  for (auto &RecordPair : Merge.second) {
    CXXRecordDecl *SecondRecord = RecordPair.first;
    // Multiple different declarations got merged together; tell the user
    // where they came from.
    if (FirstRecord == SecondRecord)
      continue;

    std::string SecondModule = getOwningModuleNameForDiagnostic(SecondRecord);

    auto *FirstDD = FirstRecord->DefinitionData;
    auto *SecondDD = RecordPair.second;

    assert(FirstDD && SecondDD && "Definitions without DefinitionData")((FirstDD && SecondDD && "Definitions without DefinitionData"
) ? static_cast<void> (0) : __assert_fail ("FirstDD && SecondDD && \"Definitions without DefinitionData\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 10193, __PRETTY_FUNCTION__));

    // Diagnostics from DefinitionData are emitted here.
    if (FirstDD != SecondDD) {
      enum ODRDefinitionDataDifference {
        NumBases,
        NumVBases,
        BaseType,
        BaseVirtual,
        BaseAccess,
      };
      auto ODRDiagError = [FirstRecord, &FirstModule,
                           this](SourceLocation Loc, SourceRange Range,
                                 ODRDefinitionDataDifference DiffType) {
        return Diag(Loc, diag::err_module_odr_violation_definition_data)
               << FirstRecord << FirstModule.empty() << FirstModule << Range
               << DiffType;
      };
      auto ODRDiagNote = [&SecondModule,
                          this](SourceLocation Loc, SourceRange Range,
                                ODRDefinitionDataDifference DiffType) {
        return Diag(Loc, diag::note_module_odr_violation_definition_data)
               << SecondModule << Range << DiffType;
      };

      unsigned FirstNumBases = FirstDD->NumBases;
      unsigned FirstNumVBases = FirstDD->NumVBases;
      unsigned SecondNumBases = SecondDD->NumBases;
      unsigned SecondNumVBases = SecondDD->NumVBases;

      auto GetSourceRange = [](struct CXXRecordDecl::DefinitionData *DD) {
        unsigned NumBases = DD->NumBases;
        if (NumBases == 0) return SourceRange();
        auto bases = DD->bases();
        return SourceRange(bases[0].getBeginLoc(),
                           bases[NumBases - 1].getEndLoc());
      };

      if (FirstNumBases != SecondNumBases) {
        ODRDiagError(FirstRecord->getLocation(), GetSourceRange(FirstDD),
                     NumBases)
            << FirstNumBases;
        ODRDiagNote(SecondRecord->getLocation(), GetSourceRange(SecondDD),
                    NumBases)
            << SecondNumBases;
        Diagnosed = true;
        break;
      }

      if (FirstNumVBases != SecondNumVBases) {
        ODRDiagError(FirstRecord->getLocation(), GetSourceRange(FirstDD),
                     NumVBases)
            << FirstNumVBases;
        ODRDiagNote(SecondRecord->getLocation(), GetSourceRange(SecondDD),
                    NumVBases)
            << SecondNumVBases;
        Diagnosed = true;
        break;
      }

      auto FirstBases = FirstDD->bases();
      auto SecondBases = SecondDD->bases();
      unsigned i = 0;
      for (i = 0; i < FirstNumBases; ++i) {
        auto FirstBase = FirstBases[i];
        auto SecondBase = SecondBases[i];
        if (ComputeQualTypeODRHash(FirstBase.getType()) !=
            ComputeQualTypeODRHash(SecondBase.getType())) {
          ODRDiagError(FirstRecord->getLocation(), FirstBase.getSourceRange(),
                       BaseType)
              << (i + 1) << FirstBase.getType();
          ODRDiagNote(SecondRecord->getLocation(),
                      SecondBase.getSourceRange(), BaseType)
              << (i + 1) << SecondBase.getType();
          break;
        }

        if (FirstBase.isVirtual() != SecondBase.isVirtual()) {
          ODRDiagError(FirstRecord->getLocation(), FirstBase.getSourceRange(),
                       BaseVirtual)
              << (i + 1) << FirstBase.isVirtual() << FirstBase.getType();
          ODRDiagNote(SecondRecord->getLocation(),
                      SecondBase.getSourceRange(), BaseVirtual)
              << (i + 1) << SecondBase.isVirtual() << SecondBase.getType();
          break;
        }

        if (FirstBase.getAccessSpecifierAsWritten() !=
            SecondBase.getAccessSpecifierAsWritten()) {
          ODRDiagError(FirstRecord->getLocation(), FirstBase.getSourceRange(),
                       BaseAccess)
              << (i + 1) << FirstBase.getType()
              << (int)FirstBase.getAccessSpecifierAsWritten();
          ODRDiagNote(SecondRecord->getLocation(),
                      SecondBase.getSourceRange(), BaseAccess)
              << (i + 1) << SecondBase.getType()
              << (int)SecondBase.getAccessSpecifierAsWritten();
          break;
        }
      }

      if (i != FirstNumBases) {
        Diagnosed = true;
        break;
      }
    }

    using DeclHashes = llvm::SmallVector<std::pair<Decl *, unsigned>, 4>;

    const ClassTemplateDecl *FirstTemplate =
        FirstRecord->getDescribedClassTemplate();
    const ClassTemplateDecl *SecondTemplate =
        SecondRecord->getDescribedClassTemplate();

    assert(!FirstTemplate == !SecondTemplate &&((!FirstTemplate == !SecondTemplate && "Both pointers should be null or non-null"
) ? static_cast<void> (0) : __assert_fail ("!FirstTemplate == !SecondTemplate && \"Both pointers should be null or non-null\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 10308, __PRETTY_FUNCTION__))
           "Both pointers should be null or non-null")((!FirstTemplate == !SecondTemplate && "Both pointers should be null or non-null"
) ? static_cast<void> (0) : __assert_fail ("!FirstTemplate == !SecondTemplate && \"Both pointers should be null or non-null\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 10308, __PRETTY_FUNCTION__));

    enum ODRTemplateDifference {
      ParamEmptyName,
      ParamName,
      ParamSingleDefaultArgument,
      ParamDifferentDefaultArgument,
    };

    if (FirstTemplate && SecondTemplate) {
      DeclHashes FirstTemplateHashes;
      DeclHashes SecondTemplateHashes;

      auto PopulateTemplateParameterHashs =
          [&ComputeSubDeclODRHash](DeclHashes &Hashes,
                                   const ClassTemplateDecl *TD) {
            for (auto *D : TD->getTemplateParameters()->asArray()) {
              Hashes.emplace_back(D, ComputeSubDeclODRHash(D));
            }
          };

      PopulateTemplateParameterHashs(FirstTemplateHashes, FirstTemplate);
      PopulateTemplateParameterHashs(SecondTemplateHashes, SecondTemplate);

      assert(FirstTemplateHashes.size() == SecondTemplateHashes.size() &&((FirstTemplateHashes.size() == SecondTemplateHashes.size() &&
 "Number of template parameters should be equal.") ? static_cast
<void> (0) : __assert_fail ("FirstTemplateHashes.size() == SecondTemplateHashes.size() && \"Number of template parameters should be equal.\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 10333, __PRETTY_FUNCTION__))
             "Number of template parameters should be equal.")((FirstTemplateHashes.size() == SecondTemplateHashes.size() &&
 "Number of template parameters should be equal.") ? static_cast
<void> (0) : __assert_fail ("FirstTemplateHashes.size() == SecondTemplateHashes.size() && \"Number of template parameters should be equal.\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 10333, __PRETTY_FUNCTION__));

      auto FirstIt = FirstTemplateHashes.begin();
      auto FirstEnd = FirstTemplateHashes.end();
      auto SecondIt = SecondTemplateHashes.begin();
      for (; FirstIt != FirstEnd; ++FirstIt, ++SecondIt) {
        if (FirstIt->second == SecondIt->second)
          continue;

        auto ODRDiagError = [FirstRecord, &FirstModule,
                             this](SourceLocation Loc, SourceRange Range,
                                   ODRTemplateDifference DiffType) {
          return Diag(Loc, diag::err_module_odr_violation_template_parameter)
                 << FirstRecord << FirstModule.empty() << FirstModule << Range
                 << DiffType;
        };
        auto ODRDiagNote = [&SecondModule,
                            this](SourceLocation Loc, SourceRange Range,
                                  ODRTemplateDifference DiffType) {
          return Diag(Loc, diag::note_module_odr_violation_template_parameter)
                 << SecondModule << Range << DiffType;
        };

        const NamedDecl* FirstDecl = cast<NamedDecl>(FirstIt->first);
        const NamedDecl* SecondDecl = cast<NamedDecl>(SecondIt->first);

        assert(FirstDecl->getKind() == SecondDecl->getKind() &&((FirstDecl->getKind() == SecondDecl->getKind() &&
 "Parameter Decl's should be the same kind.") ? static_cast<
void> (0) : __assert_fail ("FirstDecl->getKind() == SecondDecl->getKind() && \"Parameter Decl's should be the same kind.\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 10360, __PRETTY_FUNCTION__))
               "Parameter Decl's should be the same kind.")((FirstDecl->getKind() == SecondDecl->getKind() &&
 "Parameter Decl's should be the same kind.") ? static_cast<
void> (0) : __assert_fail ("FirstDecl->getKind() == SecondDecl->getKind() && \"Parameter Decl's should be the same kind.\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 10360, __PRETTY_FUNCTION__));

        DeclarationName FirstName = FirstDecl->getDeclName();
        DeclarationName SecondName = SecondDecl->getDeclName();

        if (FirstName != SecondName) {
          const bool FirstNameEmpty =
              FirstName.isIdentifier() && !FirstName.getAsIdentifierInfo();
          const bool SecondNameEmpty =
              SecondName.isIdentifier() && !SecondName.getAsIdentifierInfo();
          assert((!FirstNameEmpty || !SecondNameEmpty) &&(((!FirstNameEmpty || !SecondNameEmpty) && "Both template parameters cannot be unnamed."
) ? static_cast<void> (0) : __assert_fail ("(!FirstNameEmpty || !SecondNameEmpty) && \"Both template parameters cannot be unnamed.\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 10371, __PRETTY_FUNCTION__))
                 "Both template parameters cannot be unnamed.")(((!FirstNameEmpty || !SecondNameEmpty) && "Both template parameters cannot be unnamed."
) ? static_cast<void> (0) : __assert_fail ("(!FirstNameEmpty || !SecondNameEmpty) && \"Both template parameters cannot be unnamed.\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 10371, __PRETTY_FUNCTION__));
          ODRDiagError(FirstDecl->getLocation(), FirstDecl->getSourceRange(),
                       FirstNameEmpty ? ParamEmptyName : ParamName)
              << FirstName;
          ODRDiagNote(SecondDecl->getLocation(), SecondDecl->getSourceRange(),
                      SecondNameEmpty ? ParamEmptyName : ParamName)
              << SecondName;
          break;
        }

        switch (FirstDecl->getKind()) {
        default:
          llvm_unreachable("Invalid template parameter type.")::llvm::llvm_unreachable_internal("Invalid template parameter type."
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 10383);
        case Decl::TemplateTypeParm: {
          const auto *FirstParam = cast<TemplateTypeParmDecl>(FirstDecl);
          const auto *SecondParam = cast<TemplateTypeParmDecl>(SecondDecl);
          const bool HasFirstDefaultArgument =
              FirstParam->hasDefaultArgument() &&
              !FirstParam->defaultArgumentWasInherited();
          const bool HasSecondDefaultArgument =
              SecondParam->hasDefaultArgument() &&
              !SecondParam->defaultArgumentWasInherited();

          if (HasFirstDefaultArgument != HasSecondDefaultArgument) {
            ODRDiagError(FirstDecl->getLocation(),
                         FirstDecl->getSourceRange(),
                         ParamSingleDefaultArgument)
                << HasFirstDefaultArgument;
            ODRDiagNote(SecondDecl->getLocation(),
                        SecondDecl->getSourceRange(),
                        ParamSingleDefaultArgument)
                << HasSecondDefaultArgument;
            break;
          }

          assert(HasFirstDefaultArgument && HasSecondDefaultArgument &&((HasFirstDefaultArgument && HasSecondDefaultArgument
 && "Expecting default arguments.") ? static_cast<
void> (0) : __assert_fail ("HasFirstDefaultArgument && HasSecondDefaultArgument && \"Expecting default arguments.\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 10407, __PRETTY_FUNCTION__))
                 "Expecting default arguments.")((HasFirstDefaultArgument && HasSecondDefaultArgument
 && "Expecting default arguments.") ? static_cast<
void> (0) : __assert_fail ("HasFirstDefaultArgument && HasSecondDefaultArgument && \"Expecting default arguments.\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 10407, __PRETTY_FUNCTION__));

          ODRDiagError(FirstDecl->getLocation(), FirstDecl->getSourceRange(),
                       ParamDifferentDefaultArgument);
          ODRDiagNote(SecondDecl->getLocation(), SecondDecl->getSourceRange(),
                      ParamDifferentDefaultArgument);

          break;
        }
        case Decl::NonTypeTemplateParm: {
          const auto *FirstParam = cast<NonTypeTemplateParmDecl>(FirstDecl);
          const auto *SecondParam = cast<NonTypeTemplateParmDecl>(SecondDecl);
          const bool HasFirstDefaultArgument =
              FirstParam->hasDefaultArgument() &&
              !FirstParam->defaultArgumentWasInherited();
          const bool HasSecondDefaultArgument =
              SecondParam->hasDefaultArgument() &&
              !SecondParam->defaultArgumentWasInherited();

          if (HasFirstDefaultArgument != HasSecondDefaultArgument) {
            ODRDiagError(FirstDecl->getLocation(),
                         FirstDecl->getSourceRange(),
                         ParamSingleDefaultArgument)
                << HasFirstDefaultArgument;
            ODRDiagNote(SecondDecl->getLocation(),
                        SecondDecl->getSourceRange(),
                        ParamSingleDefaultArgument)
                << HasSecondDefaultArgument;
            break;
          }

          assert(HasFirstDefaultArgument && HasSecondDefaultArgument &&((HasFirstDefaultArgument && HasSecondDefaultArgument
 && "Expecting default arguments.") ? static_cast<
void> (0) : __assert_fail ("HasFirstDefaultArgument && HasSecondDefaultArgument && \"Expecting default arguments.\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 10439, __PRETTY_FUNCTION__))
                 "Expecting default arguments.")((HasFirstDefaultArgument && HasSecondDefaultArgument
 && "Expecting default arguments.") ? static_cast<
void> (0) : __assert_fail ("HasFirstDefaultArgument && HasSecondDefaultArgument && \"Expecting default arguments.\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 10439, __PRETTY_FUNCTION__));

          ODRDiagError(FirstDecl->getLocation(), FirstDecl->getSourceRange(),
                       ParamDifferentDefaultArgument);
          ODRDiagNote(SecondDecl->getLocation(), SecondDecl->getSourceRange(),
                      ParamDifferentDefaultArgument);

          break;
        }
        case Decl::TemplateTemplateParm: {
          const auto *FirstParam = cast<TemplateTemplateParmDecl>(FirstDecl);
          const auto *SecondParam =
              cast<TemplateTemplateParmDecl>(SecondDecl);
          const bool HasFirstDefaultArgument =
              FirstParam->hasDefaultArgument() &&
              !FirstParam->defaultArgumentWasInherited();
          const bool HasSecondDefaultArgument =
              SecondParam->hasDefaultArgument() &&
              !SecondParam->defaultArgumentWasInherited();

          if (HasFirstDefaultArgument != HasSecondDefaultArgument) {
            ODRDiagError(FirstDecl->getLocation(),
                         FirstDecl->getSourceRange(),
                         ParamSingleDefaultArgument)
                << HasFirstDefaultArgument;
            ODRDiagNote(SecondDecl->getLocation(),
                        SecondDecl->getSourceRange(),
                        ParamSingleDefaultArgument)
                << HasSecondDefaultArgument;
            break;
          }

          assert(HasFirstDefaultArgument && HasSecondDefaultArgument &&((HasFirstDefaultArgument && HasSecondDefaultArgument
 && "Expecting default arguments.") ? static_cast<
void> (0) : __assert_fail ("HasFirstDefaultArgument && HasSecondDefaultArgument && \"Expecting default arguments.\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 10472, __PRETTY_FUNCTION__))
                 "Expecting default arguments.")((HasFirstDefaultArgument && HasSecondDefaultArgument
 && "Expecting default arguments.") ? static_cast<
void> (0) : __assert_fail ("HasFirstDefaultArgument && HasSecondDefaultArgument && \"Expecting default arguments.\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 10472, __PRETTY_FUNCTION__));

          ODRDiagError(FirstDecl->getLocation(), FirstDecl->getSourceRange(),
                       ParamDifferentDefaultArgument);
          ODRDiagNote(SecondDecl->getLocation(), SecondDecl->getSourceRange(),
                      ParamDifferentDefaultArgument);

          break;
        }
        }

        break;
      }

      if (FirstIt != FirstEnd) {
        Diagnosed = true;
        break;
      }
    }

    DeclHashes FirstHashes;
    DeclHashes SecondHashes;

    auto PopulateHashes = [&ComputeSubDeclODRHash, FirstRecord](
                              DeclHashes &Hashes, CXXRecordDecl *Record) {
      for (auto *D : Record->decls()) {
        // Due to decl merging, the first CXXRecordDecl is the parent of
        // Decls in both records.
        if (!ODRHash::isWhitelistedDecl(D, FirstRecord))
          continue;
        Hashes.emplace_back(D, ComputeSubDeclODRHash(D));
      }
    };
    PopulateHashes(FirstHashes, FirstRecord);
    PopulateHashes(SecondHashes, SecondRecord);

    // Used with err_module_odr_violation_mismatch_decl and
    // note_module_odr_violation_mismatch_decl
    // This list should be the same Decl's as in ODRHash::isWhiteListedDecl
    enum {
      EndOfClass,
      PublicSpecifer,
      PrivateSpecifer,
      ProtectedSpecifer,
      StaticAssert,
      Field,
      CXXMethod,
      TypeAlias,
      TypeDef,
      Var,
      Friend,
      FunctionTemplate,
      Other
    } FirstDiffType = Other,
      SecondDiffType = Other;

    auto DifferenceSelector = [](Decl *D) {
      assert(D && "valid Decl required")((D && "valid Decl required") ? static_cast<void>
 (0) : __assert_fail ("D && \"valid Decl required\"",
 "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 10529, __PRETTY_FUNCTION__));
      switch (D->getKind()) {
      default:
        return Other;
      case Decl::AccessSpec:
        switch (D->getAccess()) {
        case AS_public:
          return PublicSpecifer;
        case AS_private:
          return PrivateSpecifer;
        case AS_protected:
          return ProtectedSpecifer;
        case AS_none:
          break;
        }
        llvm_unreachable("Invalid access specifier")::llvm::llvm_unreachable_internal("Invalid access specifier",
 "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 10544);
      case Decl::StaticAssert:
        return StaticAssert;
      case Decl::Field:
        return Field;
      case Decl::CXXMethod:
      case Decl::CXXConstructor:
      case Decl::CXXDestructor:
        return CXXMethod;
      case Decl::TypeAlias:
        return TypeAlias;
      case Decl::Typedef:
        return TypeDef;
      case Decl::Var:
        return Var;
      case Decl::Friend:
        return Friend;
      case Decl::FunctionTemplate:
        return FunctionTemplate;
      }
    };

    Decl *FirstDecl = nullptr;
    Decl *SecondDecl = nullptr;
    auto FirstIt = FirstHashes.begin();
    auto SecondIt = SecondHashes.begin();

    // If there is a diagnoseable difference, FirstDiffType and
    // SecondDiffType will not be Other and FirstDecl and SecondDecl will be
    // filled in if not EndOfClass.
    while (FirstIt != FirstHashes.end() || SecondIt != SecondHashes.end()) {
      if (FirstIt != FirstHashes.end() && SecondIt != SecondHashes.end() &&
          FirstIt->second == SecondIt->second) {
        ++FirstIt;
        ++SecondIt;
        continue;
      }

      FirstDecl = FirstIt == FirstHashes.end() ? nullptr : FirstIt->first;
      SecondDecl = SecondIt == SecondHashes.end() ? nullptr : SecondIt->first;

      FirstDiffType = FirstDecl ? DifferenceSelector(FirstDecl) : EndOfClass;
      SecondDiffType =
          SecondDecl ? DifferenceSelector(SecondDecl) : EndOfClass;

      break;
    }

    if (FirstDiffType == Other || SecondDiffType == Other) {
      // Reaching this point means an unexpected Decl was encountered
      // or no difference was detected.  This causes a generic error
      // message to be emitted.
      Diag(FirstRecord->getLocation(),
           diag::err_module_odr_violation_different_definitions)
          << FirstRecord << FirstModule.empty() << FirstModule;

      if (FirstDecl) {
        Diag(FirstDecl->getLocation(), diag::note_first_module_difference)
            << FirstRecord << FirstDecl->getSourceRange();
      }

      Diag(SecondRecord->getLocation(),
           diag::note_module_odr_violation_different_definitions)
          << SecondModule;

      if (SecondDecl) {
        Diag(SecondDecl->getLocation(), diag::note_second_module_difference)
            << SecondDecl->getSourceRange();
      }

      Diagnosed = true;
      break;
    }

    if (FirstDiffType != SecondDiffType) {
      SourceLocation FirstLoc;
      SourceRange FirstRange;
      if (FirstDiffType == EndOfClass) {
        FirstLoc = FirstRecord->getBraceRange().getEnd();
      } else {
        FirstLoc = FirstIt->first->getLocation();
        FirstRange = FirstIt->first->getSourceRange();
      }
      Diag(FirstLoc, diag::err_module_odr_violation_mismatch_decl)
          << FirstRecord << FirstModule.empty() << FirstModule << FirstRange
          << FirstDiffType;

      SourceLocation SecondLoc;
      SourceRange SecondRange;
      if (SecondDiffType == EndOfClass) {
        SecondLoc = SecondRecord->getBraceRange().getEnd();
      } else {
        SecondLoc = SecondDecl->getLocation();
        SecondRange = SecondDecl->getSourceRange();
      }
      Diag(SecondLoc, diag::note_module_odr_violation_mismatch_decl)
          << SecondModule << SecondRange << SecondDiffType;
      Diagnosed = true;
      break;
    }

    assert(FirstDiffType == SecondDiffType)((FirstDiffType == SecondDiffType) ? static_cast<void> (
0) : __assert_fail ("FirstDiffType == SecondDiffType", "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 10645, __PRETTY_FUNCTION__));

    // Used with err_module_odr_violation_mismatch_decl_diff and
    // note_module_odr_violation_mismatch_decl_diff
    enum ODRDeclDifference {
      StaticAssertCondition,
      StaticAssertMessage,
      StaticAssertOnlyMessage,
      FieldName,
      FieldTypeName,
      FieldSingleBitField,
      FieldDifferentWidthBitField,
      FieldSingleMutable,
      FieldSingleInitializer,
      FieldDifferentInitializers,
      MethodName,
      MethodDeleted,
      MethodDefaulted,
      MethodVirtual,
      MethodStatic,
      MethodVolatile,
      MethodConst,
      MethodInline,
      MethodNumberParameters,
      MethodParameterType,
      MethodParameterName,
      MethodParameterSingleDefaultArgument,
      MethodParameterDifferentDefaultArgument,
      MethodNoTemplateArguments,
      MethodDifferentNumberTemplateArguments,
      MethodDifferentTemplateArgument,
      MethodSingleBody,
      MethodDifferentBody,
      TypedefName,
      TypedefType,
      VarName,
      VarType,
      VarSingleInitializer,
      VarDifferentInitializer,
      VarConstexpr,
      FriendTypeFunction,
      FriendType,
      FriendFunction,
      FunctionTemplateDifferentNumberParameters,
      FunctionTemplateParameterDifferentKind,
      FunctionTemplateParameterName,
      FunctionTemplateParameterSingleDefaultArgument,
      FunctionTemplateParameterDifferentDefaultArgument,
      FunctionTemplateParameterDifferentType,
      FunctionTemplatePackParameter,
    };

    // These lambdas have the common portions of the ODR diagnostics.  This
    // has the same return as Diag(), so addition parameters can be passed
    // in with operator<<
    auto ODRDiagError = [FirstRecord, &FirstModule, this](
        SourceLocation Loc, SourceRange Range, ODRDeclDifference DiffType) {
      return Diag(Loc, diag::err_module_odr_violation_mismatch_decl_diff)
             << FirstRecord << FirstModule.empty() << FirstModule << Range
             << DiffType;
    };
    auto ODRDiagNote = [&SecondModule, this](
        SourceLocation Loc, SourceRange Range, ODRDeclDifference DiffType) {
      return Diag(Loc, diag::note_module_odr_violation_mismatch_decl_diff)
             << SecondModule << Range << DiffType;
    };

    switch (FirstDiffType) {
    case Other:
    case EndOfClass:
    case PublicSpecifer:
    case PrivateSpecifer:
    case ProtectedSpecifer:
      llvm_unreachable("Invalid diff type")::llvm::llvm_unreachable_internal("Invalid diff type", "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 10718);

    case StaticAssert: {
      StaticAssertDecl *FirstSA = cast<StaticAssertDecl>(FirstDecl);
      StaticAssertDecl *SecondSA = cast<StaticAssertDecl>(SecondDecl);

      Expr *FirstExpr = FirstSA->getAssertExpr();
      Expr *SecondExpr = SecondSA->getAssertExpr();
      unsigned FirstODRHash = ComputeODRHash(FirstExpr);
      unsigned SecondODRHash = ComputeODRHash(SecondExpr);
      if (FirstODRHash != SecondODRHash) {
        ODRDiagError(FirstExpr->getBeginLoc(), FirstExpr->getSourceRange(),
                     StaticAssertCondition);
        ODRDiagNote(SecondExpr->getBeginLoc(), SecondExpr->getSourceRange(),
                    StaticAssertCondition);
        Diagnosed = true;
        break;
      }

      StringLiteral *FirstStr = FirstSA->getMessage();
      StringLiteral *SecondStr = SecondSA->getMessage();
      assert((FirstStr || SecondStr) && "Both messages cannot be empty")(((FirstStr || SecondStr) && "Both messages cannot be empty"
) ? static_cast<void> (0) : __assert_fail ("(FirstStr || SecondStr) && \"Both messages cannot be empty\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 10739, __PRETTY_FUNCTION__));
      if ((FirstStr && !SecondStr) || (!FirstStr && SecondStr)) {
        SourceLocation FirstLoc, SecondLoc;
        SourceRange FirstRange, SecondRange;
        if (FirstStr) {
          FirstLoc = FirstStr->getBeginLoc();
          FirstRange = FirstStr->getSourceRange();
        } else {
          FirstLoc = FirstSA->getBeginLoc();
          FirstRange = FirstSA->getSourceRange();
        }
        if (SecondStr) {
          SecondLoc = SecondStr->getBeginLoc();
          SecondRange = SecondStr->getSourceRange();
        } else {
          SecondLoc = SecondSA->getBeginLoc();
          SecondRange = SecondSA->getSourceRange();
        }
        ODRDiagError(FirstLoc, FirstRange, StaticAssertOnlyMessage)
            << (FirstStr == nullptr);
        ODRDiagNote(SecondLoc, SecondRange, StaticAssertOnlyMessage)
            << (SecondStr == nullptr);
        Diagnosed = true;
        break;
      }

      if (FirstStr && SecondStr &&
          FirstStr->getString() != SecondStr->getString()) {
        ODRDiagError(FirstStr->getBeginLoc(), FirstStr->getSourceRange(),
                     StaticAssertMessage);
        ODRDiagNote(SecondStr->getBeginLoc(), SecondStr->getSourceRange(),
                    StaticAssertMessage);
        Diagnosed = true;
        break;
      }
      break;
    }
    case Field: {
      FieldDecl *FirstField = cast<FieldDecl>(FirstDecl);
      FieldDecl *SecondField = cast<FieldDecl>(SecondDecl);
      IdentifierInfo *FirstII = FirstField->getIdentifier();
      IdentifierInfo *SecondII = SecondField->getIdentifier();
      if (FirstII->getName() != SecondII->getName()) {
        ODRDiagError(FirstField->getLocation(), FirstField->getSourceRange(),
                     FieldName)
            << FirstII;
        ODRDiagNote(SecondField->getLocation(), SecondField->getSourceRange(),
                    FieldName)
            << SecondII;

        Diagnosed = true;
        break;
      }

      assert(getContext().hasSameType(FirstField->getType(),((getContext().hasSameType(FirstField->getType(), SecondField
->getType())) ? static_cast<void> (0) : __assert_fail
 ("getContext().hasSameType(FirstField->getType(), SecondField->getType())"
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 10794, __PRETTY_FUNCTION__))
                                      SecondField->getType()))((getContext().hasSameType(FirstField->getType(), SecondField
->getType())) ? static_cast<void> (0) : __assert_fail
 ("getContext().hasSameType(FirstField->getType(), SecondField->getType())"
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 10794, __PRETTY_FUNCTION__));

      QualType FirstType = FirstField->getType();
      QualType SecondType = SecondField->getType();
      if (ComputeQualTypeODRHash(FirstType) !=
          ComputeQualTypeODRHash(SecondType)) {
        ODRDiagError(FirstField->getLocation(), FirstField->getSourceRange(),
                     FieldTypeName)
            << FirstII << FirstType;
        ODRDiagNote(SecondField->getLocation(), SecondField->getSourceRange(),
                    FieldTypeName)
            << SecondII << SecondType;

        Diagnosed = true;
        break;
      }

      const bool IsFirstBitField = FirstField->isBitField();
      const bool IsSecondBitField = SecondField->isBitField();
      if (IsFirstBitField != IsSecondBitField) {
        ODRDiagError(FirstField->getLocation(), FirstField->getSourceRange(),
                     FieldSingleBitField)
            << FirstII << IsFirstBitField;
        ODRDiagNote(SecondField->getLocation(), SecondField->getSourceRange(),
                    FieldSingleBitField)
            << SecondII << IsSecondBitField;
        Diagnosed = true;
        break;
      }

      if (IsFirstBitField && IsSecondBitField) {
        ODRDiagError(FirstField->getLocation(), FirstField->getSourceRange(),
                     FieldDifferentWidthBitField)
            << FirstII << FirstField->getBitWidth()->getSourceRange();
        ODRDiagNote(SecondField->getLocation(), SecondField->getSourceRange(),
                    FieldDifferentWidthBitField)
            << SecondII << SecondField->getBitWidth()->getSourceRange();
        Diagnosed = true;
        break;
      }

      const bool IsFirstMutable = FirstField->isMutable();
      const bool IsSecondMutable = SecondField->isMutable();
      if (IsFirstMutable != IsSecondMutable) {
        ODRDiagError(FirstField->getLocation(), FirstField->getSourceRange(),
                     FieldSingleMutable)
            << FirstII << IsFirstMutable;
        ODRDiagNote(SecondField->getLocation(), SecondField->getSourceRange(),
                    FieldSingleMutable)
            << SecondII << IsSecondMutable;
        Diagnosed = true;
        break;
      }

      const Expr *FirstInitializer = FirstField->getInClassInitializer();
      const Expr *SecondInitializer = SecondField->getInClassInitializer();
      if ((!FirstInitializer && SecondInitializer) ||
          (FirstInitializer && !SecondInitializer)) {
        ODRDiagError(FirstField->getLocation(), FirstField->getSourceRange(),
                     FieldSingleInitializer)
            << FirstII << (FirstInitializer != nullptr);
        ODRDiagNote(SecondField->getLocation(), SecondField->getSourceRange(),
                    FieldSingleInitializer)
            << SecondII << (SecondInitializer != nullptr);
        Diagnosed = true;
        break;
      }

      if (FirstInitializer && SecondInitializer) {
        unsigned FirstInitHash = ComputeODRHash(FirstInitializer);
        unsigned SecondInitHash = ComputeODRHash(SecondInitializer);
        if (FirstInitHash != SecondInitHash) {
          ODRDiagError(FirstField->getLocation(),
                       FirstField->getSourceRange(),
                       FieldDifferentInitializers)
              << FirstII << FirstInitializer->getSourceRange();
          ODRDiagNote(SecondField->getLocation(),
                      SecondField->getSourceRange(),
                      FieldDifferentInitializers)
              << SecondII << SecondInitializer->getSourceRange();
          Diagnosed = true;
          break;
        }
      }

      break;
    }
    case CXXMethod: {
      enum {
        DiagMethod,
        DiagConstructor,
        DiagDestructor,
      } FirstMethodType,
          SecondMethodType;
      auto GetMethodTypeForDiagnostics = [](const CXXMethodDecl* D) {
        if (isa<CXXConstructorDecl>(D)) return DiagConstructor;
        if (isa<CXXDestructorDecl>(D)) return DiagDestructor;
        return DiagMethod;
      };
      const CXXMethodDecl *FirstMethod = cast<CXXMethodDecl>(FirstDecl);
      const CXXMethodDecl *SecondMethod = cast<CXXMethodDecl>(SecondDecl);
      FirstMethodType = GetMethodTypeForDiagnostics(FirstMethod);
      SecondMethodType = GetMethodTypeForDiagnostics(SecondMethod);
      auto FirstName = FirstMethod->getDeclName();
      auto SecondName = SecondMethod->getDeclName();
      if (FirstMethodType != SecondMethodType || FirstName != SecondName) {
        ODRDiagError(FirstMethod->getLocation(),
                     FirstMethod->getSourceRange(), MethodName)
            << FirstMethodType << FirstName;
        ODRDiagNote(SecondMethod->getLocation(),
                    SecondMethod->getSourceRange(), MethodName)
            << SecondMethodType << SecondName;

        Diagnosed = true;
        break;
      }

      const bool FirstDeleted = FirstMethod->isDeletedAsWritten();
      const bool SecondDeleted = SecondMethod->isDeletedAsWritten();
      if (FirstDeleted != SecondDeleted) {
        ODRDiagError(FirstMethod->getLocation(),
                     FirstMethod->getSourceRange(), MethodDeleted)
            << FirstMethodType << FirstName << FirstDeleted;

        ODRDiagNote(SecondMethod->getLocation(),
                    SecondMethod->getSourceRange(), MethodDeleted)
            << SecondMethodType << SecondName << SecondDeleted;
        Diagnosed = true;
        break;
      }

      const bool FirstDefaulted = FirstMethod->isExplicitlyDefaulted();
      const bool SecondDefaulted = SecondMethod->isExplicitlyDefaulted();
      if (FirstDefaulted != SecondDefaulted) {
        ODRDiagError(FirstMethod->getLocation(),
                     FirstMethod->getSourceRange(), MethodDefaulted)
            << FirstMethodType << FirstName << FirstDefaulted;

        ODRDiagNote(SecondMethod->getLocation(),
                    SecondMethod->getSourceRange(), MethodDefaulted)
            << SecondMethodType << SecondName << SecondDefaulted;
        Diagnosed = true;
        break;
      }

      const bool FirstVirtual = FirstMethod->isVirtualAsWritten();
      const bool SecondVirtual = SecondMethod->isVirtualAsWritten();
      const bool FirstPure = FirstMethod->isPure();
      const bool SecondPure = SecondMethod->isPure();
      if ((FirstVirtual || SecondVirtual) &&
          (FirstVirtual != SecondVirtual || FirstPure != SecondPure)) {
        ODRDiagError(FirstMethod->getLocation(),
                     FirstMethod->getSourceRange(), MethodVirtual)
            << FirstMethodType << FirstName << FirstPure << FirstVirtual;
        ODRDiagNote(SecondMethod->getLocation(),
                    SecondMethod->getSourceRange(), MethodVirtual)
            << SecondMethodType << SecondName << SecondPure << SecondVirtual;
        Diagnosed = true;
        break;
      }

      // CXXMethodDecl::isStatic uses the canonical Decl.  With Decl merging,
      // FirstDecl is the canonical Decl of SecondDecl, so the storage
      // class needs to be checked instead.
      const auto FirstStorage = FirstMethod->getStorageClass();
      const auto SecondStorage = SecondMethod->getStorageClass();
      const bool FirstStatic = FirstStorage == SC_Static;
      const bool SecondStatic = SecondStorage == SC_Static;
      if (FirstStatic != SecondStatic) {
        ODRDiagError(FirstMethod->getLocation(),
                     FirstMethod->getSourceRange(), MethodStatic)
            << FirstMethodType << FirstName << FirstStatic;
        ODRDiagNote(SecondMethod->getLocation(),
                    SecondMethod->getSourceRange(), MethodStatic)
            << SecondMethodType << SecondName << SecondStatic;
        Diagnosed = true;
        break;
      }

      const bool FirstVolatile = FirstMethod->isVolatile();
      const bool SecondVolatile = SecondMethod->isVolatile();
      if (FirstVolatile != SecondVolatile) {
        ODRDiagError(FirstMethod->getLocation(),
                     FirstMethod->getSourceRange(), MethodVolatile)
            << FirstMethodType << FirstName << FirstVolatile;
        ODRDiagNote(SecondMethod->getLocation(),
                    SecondMethod->getSourceRange(), MethodVolatile)
            << SecondMethodType << SecondName << SecondVolatile;
        Diagnosed = true;
        break;
      }

      const bool FirstConst = FirstMethod->isConst();
      const bool SecondConst = SecondMethod->isConst();
      if (FirstConst != SecondConst) {
        ODRDiagError(FirstMethod->getLocation(),
                     FirstMethod->getSourceRange(), MethodConst)
            << FirstMethodType << FirstName << FirstConst;
        ODRDiagNote(SecondMethod->getLocation(),
                    SecondMethod->getSourceRange(), MethodConst)
            << SecondMethodType << SecondName << SecondConst;
        Diagnosed = true;
        break;
      }

      const bool FirstInline = FirstMethod->isInlineSpecified();
      const bool SecondInline = SecondMethod->isInlineSpecified();
      if (FirstInline != SecondInline) {
        ODRDiagError(FirstMethod->getLocation(),
                     FirstMethod->getSourceRange(), MethodInline)
            << FirstMethodType << FirstName << FirstInline;
        ODRDiagNote(SecondMethod->getLocation(),
                    SecondMethod->getSourceRange(), MethodInline)
            << SecondMethodType << SecondName << SecondInline;
        Diagnosed = true;
        break;
      }

      const unsigned FirstNumParameters = FirstMethod->param_size();
      const unsigned SecondNumParameters = SecondMethod->param_size();
      if (FirstNumParameters != SecondNumParameters) {
        ODRDiagError(FirstMethod->getLocation(),
                     FirstMethod->getSourceRange(), MethodNumberParameters)
            << FirstMethodType << FirstName << FirstNumParameters;
        ODRDiagNote(SecondMethod->getLocation(),
                    SecondMethod->getSourceRange(), MethodNumberParameters)
            << SecondMethodType << SecondName << SecondNumParameters;
        Diagnosed = true;
        break;
      }

      // Need this status boolean to know when break out of the switch.
      bool ParameterMismatch = false;
      for (unsigned I = 0; I < FirstNumParameters; ++I) {
        const ParmVarDecl *FirstParam = FirstMethod->getParamDecl(I);
        const ParmVarDecl *SecondParam = SecondMethod->getParamDecl(I);

        QualType FirstParamType = FirstParam->getType();
        QualType SecondParamType = SecondParam->getType();
        if (FirstParamType != SecondParamType &&
            ComputeQualTypeODRHash(FirstParamType) !=
                ComputeQualTypeODRHash(SecondParamType)) {
          if (const DecayedType *ParamDecayedType =
                  FirstParamType->getAs<DecayedType>()) {
            ODRDiagError(FirstMethod->getLocation(),
                         FirstMethod->getSourceRange(), MethodParameterType)
                << FirstMethodType << FirstName << (I + 1) << FirstParamType
                << true << ParamDecayedType->getOriginalType();
          } else {
            ODRDiagError(FirstMethod->getLocation(),
                         FirstMethod->getSourceRange(), MethodParameterType)
                << FirstMethodType << FirstName << (I + 1) << FirstParamType
                << false;
          }

          if (const DecayedType *ParamDecayedType =
                  SecondParamType->getAs<DecayedType>()) {
            ODRDiagNote(SecondMethod->getLocation(),
                        SecondMethod->getSourceRange(), MethodParameterType)
                << SecondMethodType << SecondName << (I + 1)
                << SecondParamType << true
                << ParamDecayedType->getOriginalType();
          } else {
            ODRDiagNote(SecondMethod->getLocation(),
                        SecondMethod->getSourceRange(), MethodParameterType)
                << SecondMethodType << SecondName << (I + 1)
                << SecondParamType << false;
          }
          ParameterMismatch = true;
          break;
        }

        DeclarationName FirstParamName = FirstParam->getDeclName();
        DeclarationName SecondParamName = SecondParam->getDeclName();
        if (FirstParamName != SecondParamName) {
          ODRDiagError(FirstMethod->getLocation(),
                       FirstMethod->getSourceRange(), MethodParameterName)
              << FirstMethodType << FirstName << (I + 1) << FirstParamName;
          ODRDiagNote(SecondMethod->getLocation(),
                      SecondMethod->getSourceRange(), MethodParameterName)
              << SecondMethodType << SecondName << (I + 1) << SecondParamName;
          ParameterMismatch = true;
          break;
        }

        const Expr *FirstInit = FirstParam->getInit();
        const Expr *SecondInit = SecondParam->getInit();
        if ((FirstInit == nullptr) != (SecondInit == nullptr)) {
          ODRDiagError(FirstMethod->getLocation(),
                       FirstMethod->getSourceRange(),
                       MethodParameterSingleDefaultArgument)
              << FirstMethodType << FirstName << (I + 1)
              << (FirstInit == nullptr)
              << (FirstInit ? FirstInit->getSourceRange() : SourceRange());
          ODRDiagNote(SecondMethod->getLocation(),
                      SecondMethod->getSourceRange(),
                      MethodParameterSingleDefaultArgument)
              << SecondMethodType << SecondName << (I + 1)
              << (SecondInit == nullptr)
              << (SecondInit ? SecondInit->getSourceRange() : SourceRange());
          ParameterMismatch = true;
          break;
        }

        if (FirstInit && SecondInit &&
            ComputeODRHash(FirstInit) != ComputeODRHash(SecondInit)) {
          ODRDiagError(FirstMethod->getLocation(),
                       FirstMethod->getSourceRange(),
                       MethodParameterDifferentDefaultArgument)
              << FirstMethodType << FirstName << (I + 1)
              << FirstInit->getSourceRange();
          ODRDiagNote(SecondMethod->getLocation(),
                      SecondMethod->getSourceRange(),
                      MethodParameterDifferentDefaultArgument)
              << SecondMethodType << SecondName << (I + 1)
              << SecondInit->getSourceRange();
          ParameterMismatch = true;
          break;

        }
      }

      if (ParameterMismatch) {
        Diagnosed = true;
        break;
      }

      const auto *FirstTemplateArgs =
          FirstMethod->getTemplateSpecializationArgs();
      const auto *SecondTemplateArgs =
          SecondMethod->getTemplateSpecializationArgs();

      if ((FirstTemplateArgs && !SecondTemplateArgs) ||
          (!FirstTemplateArgs && SecondTemplateArgs)) {
        ODRDiagError(FirstMethod->getLocation(),
                     FirstMethod->getSourceRange(), MethodNoTemplateArguments)
            << FirstMethodType << FirstName << (FirstTemplateArgs != nullptr);
        ODRDiagNote(SecondMethod->getLocation(),
                    SecondMethod->getSourceRange(), MethodNoTemplateArguments)
            << SecondMethodType << SecondName
            << (SecondTemplateArgs != nullptr);

        Diagnosed = true;
        break;
      }

      if (FirstTemplateArgs && SecondTemplateArgs) {
        // Remove pack expansions from argument list.
        auto ExpandTemplateArgumentList =
            [](const TemplateArgumentList *TAL) {
              llvm::SmallVector<const TemplateArgument *, 8> ExpandedList;
              for (const TemplateArgument &TA : TAL->asArray()) {
                if (TA.getKind() != TemplateArgument::Pack) {
                  ExpandedList.push_back(&TA);
                  continue;
                }
                for (const TemplateArgument &PackTA : TA.getPackAsArray()) {
                  ExpandedList.push_back(&PackTA);
                }
              }
              return ExpandedList;
            };
        llvm::SmallVector<const TemplateArgument *, 8> FirstExpandedList =
            ExpandTemplateArgumentList(FirstTemplateArgs);
        llvm::SmallVector<const TemplateArgument *, 8> SecondExpandedList =
            ExpandTemplateArgumentList(SecondTemplateArgs);

        if (FirstExpandedList.size() != SecondExpandedList.size()) {
          ODRDiagError(FirstMethod->getLocation(),
                       FirstMethod->getSourceRange(),
                       MethodDifferentNumberTemplateArguments)
              << FirstMethodType << FirstName
              << (unsigned)FirstExpandedList.size();
          ODRDiagNote(SecondMethod->getLocation(),
                      SecondMethod->getSourceRange(),
                      MethodDifferentNumberTemplateArguments)
              << SecondMethodType << SecondName
              << (unsigned)SecondExpandedList.size();

          Diagnosed = true;
          break;
        }

        bool TemplateArgumentMismatch = false;
        for (unsigned i = 0, e = FirstExpandedList.size(); i != e; ++i) {
          const TemplateArgument &FirstTA = *FirstExpandedList[i],
                                 &SecondTA = *SecondExpandedList[i];
          if (ComputeTemplateArgumentODRHash(FirstTA) ==
              ComputeTemplateArgumentODRHash(SecondTA)) {
            continue;
          }

          ODRDiagError(FirstMethod->getLocation(),
                       FirstMethod->getSourceRange(),
                       MethodDifferentTemplateArgument)
              << FirstMethodType << FirstName << FirstTA << i + 1;
          ODRDiagNote(SecondMethod->getLocation(),
                      SecondMethod->getSourceRange(),
                      MethodDifferentTemplateArgument)
              << SecondMethodType << SecondName << SecondTA << i + 1;

          TemplateArgumentMismatch = true;
          break;
        }

        if (TemplateArgumentMismatch) {
          Diagnosed = true;
          break;
        }
      }

      // Compute the hash of the method as if it has no body.
      auto ComputeCXXMethodODRHash = [&Hash](const CXXMethodDecl *D) {
        Hash.clear();
        Hash.AddFunctionDecl(D, true /*SkipBody*/);
        return Hash.CalculateHash();
      };

      // Compare the hash generated to the hash stored.  A difference means
      // that a body was present in the original source.  Due to merging,
      // the stardard way of detecting a body will not work.
      const bool HasFirstBody =
          ComputeCXXMethodODRHash(FirstMethod) != FirstMethod->getODRHash();
      const bool HasSecondBody =
          ComputeCXXMethodODRHash(SecondMethod) != SecondMethod->getODRHash();

      if (HasFirstBody != HasSecondBody) {
        ODRDiagError(FirstMethod->getLocation(),
                     FirstMethod->getSourceRange(), MethodSingleBody)
            << FirstMethodType << FirstName << HasFirstBody;
        ODRDiagNote(SecondMethod->getLocation(),
                    SecondMethod->getSourceRange(), MethodSingleBody)
            << SecondMethodType << SecondName << HasSecondBody;
        Diagnosed = true;
        break;
      }

      if (HasFirstBody && HasSecondBody) {
        ODRDiagError(FirstMethod->getLocation(),
                     FirstMethod->getSourceRange(), MethodDifferentBody)
            << FirstMethodType << FirstName;
        ODRDiagNote(SecondMethod->getLocation(),
                    SecondMethod->getSourceRange(), MethodDifferentBody)
            << SecondMethodType << SecondName;
        Diagnosed = true;
        break;
      }

      break;
    }
    case TypeAlias:
    case TypeDef: {
      TypedefNameDecl *FirstTD = cast<TypedefNameDecl>(FirstDecl);
      TypedefNameDecl *SecondTD = cast<TypedefNameDecl>(SecondDecl);
      auto FirstName = FirstTD->getDeclName();
      auto SecondName = SecondTD->getDeclName();
      if (FirstName != SecondName) {
        ODRDiagError(FirstTD->getLocation(), FirstTD->getSourceRange(),
                     TypedefName)
            << (FirstDiffType == TypeAlias) << FirstName;
        ODRDiagNote(SecondTD->getLocation(), SecondTD->getSourceRange(),
                    TypedefName)
            << (FirstDiffType == TypeAlias) << SecondName;
        Diagnosed = true;
        break;
      }

      QualType FirstType = FirstTD->getUnderlyingType();
      QualType SecondType = SecondTD->getUnderlyingType();
      if (ComputeQualTypeODRHash(FirstType) !=
          ComputeQualTypeODRHash(SecondType)) {
        ODRDiagError(FirstTD->getLocation(), FirstTD->getSourceRange(),
                     TypedefType)
            << (FirstDiffType == TypeAlias) << FirstName << FirstType;
        ODRDiagNote(SecondTD->getLocation(), SecondTD->getSourceRange(),
                    TypedefType)
            << (FirstDiffType == TypeAlias) << SecondName << SecondType;
        Diagnosed = true;
        break;
      }
      break;
    }
    case Var: {
      VarDecl *FirstVD = cast<VarDecl>(FirstDecl);
      VarDecl *SecondVD = cast<VarDecl>(SecondDecl);
      auto FirstName = FirstVD->getDeclName();
      auto SecondName = SecondVD->getDeclName();
      if (FirstName != SecondName) {
        ODRDiagError(FirstVD->getLocation(), FirstVD->getSourceRange(),
                     VarName)
            << FirstName;
        ODRDiagNote(SecondVD->getLocation(), SecondVD->getSourceRange(),
                    VarName)
            << SecondName;
        Diagnosed = true;
        break;
      }

      QualType FirstType = FirstVD->getType();
      QualType SecondType = SecondVD->getType();
      if (ComputeQualTypeODRHash(FirstType) !=
                      ComputeQualTypeODRHash(SecondType)) {
        ODRDiagError(FirstVD->getLocation(), FirstVD->getSourceRange(),
                     VarType)
            << FirstName << FirstType;
        ODRDiagNote(SecondVD->getLocation(), SecondVD->getSourceRange(),
                    VarType)
            << SecondName << SecondType;
        Diagnosed = true;
        break;
      }

      const Expr *FirstInit = FirstVD->getInit();
      const Expr *SecondInit = SecondVD->getInit();
      if ((FirstInit == nullptr) != (SecondInit == nullptr)) {
        ODRDiagError(FirstVD->getLocation(), FirstVD->getSourceRange(),
                     VarSingleInitializer)
            << FirstName << (FirstInit == nullptr)
            << (FirstInit ? FirstInit->getSourceRange(): SourceRange());
        ODRDiagNote(SecondVD->getLocation(), SecondVD->getSourceRange(),
                    VarSingleInitializer)
            << SecondName << (SecondInit == nullptr)
            << (SecondInit ? SecondInit->getSourceRange() : SourceRange());
        Diagnosed = true;
        break;
      }

      if (FirstInit && SecondInit &&
          ComputeODRHash(FirstInit) != ComputeODRHash(SecondInit)) {
        ODRDiagError(FirstVD->getLocation(), FirstVD->getSourceRange(),
                     VarDifferentInitializer)
            << FirstName << FirstInit->getSourceRange();
        ODRDiagNote(SecondVD->getLocation(), SecondVD->getSourceRange(),
                    VarDifferentInitializer)
            << SecondName << SecondInit->getSourceRange();
        Diagnosed = true;
        break;
      }

      const bool FirstIsConstexpr = FirstVD->isConstexpr();
      const bool SecondIsConstexpr = SecondVD->isConstexpr();
      if (FirstIsConstexpr != SecondIsConstexpr) {
        ODRDiagError(FirstVD->getLocation(), FirstVD->getSourceRange(),
                     VarConstexpr)
            << FirstName << FirstIsConstexpr;
        ODRDiagNote(SecondVD->getLocation(), SecondVD->getSourceRange(),
                    VarConstexpr)
            << SecondName << SecondIsConstexpr;
        Diagnosed = true;
        break;
      }
      break;
    }
    case Friend: {
      FriendDecl *FirstFriend = cast<FriendDecl>(FirstDecl);
      FriendDecl *SecondFriend = cast<FriendDecl>(SecondDecl);

      NamedDecl *FirstND = FirstFriend->getFriendDecl();
      NamedDecl *SecondND = SecondFriend->getFriendDecl();

      TypeSourceInfo *FirstTSI = FirstFriend->getFriendType();
      TypeSourceInfo *SecondTSI = SecondFriend->getFriendType();

      if (FirstND && SecondND) {
        ODRDiagError(FirstFriend->getFriendLoc(),
                     FirstFriend->getSourceRange(), FriendFunction)
            << FirstND;
        ODRDiagNote(SecondFriend->getFriendLoc(),
                    SecondFriend->getSourceRange(), FriendFunction)
            << SecondND;

        Diagnosed = true;
        break;
      }

      if (FirstTSI && SecondTSI) {
        QualType FirstFriendType = FirstTSI->getType();
        QualType SecondFriendType = SecondTSI->getType();
        assert(ComputeQualTypeODRHash(FirstFriendType) !=((ComputeQualTypeODRHash(FirstFriendType) != ComputeQualTypeODRHash
(SecondFriendType)) ? static_cast<void> (0) : __assert_fail
 ("ComputeQualTypeODRHash(FirstFriendType) != ComputeQualTypeODRHash(SecondFriendType)"
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 11373, __PRETTY_FUNCTION__))
               ComputeQualTypeODRHash(SecondFriendType))((ComputeQualTypeODRHash(FirstFriendType) != ComputeQualTypeODRHash
(SecondFriendType)) ? static_cast<void> (0) : __assert_fail
 ("ComputeQualTypeODRHash(FirstFriendType) != ComputeQualTypeODRHash(SecondFriendType)"
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 11373, __PRETTY_FUNCTION__));
        ODRDiagError(FirstFriend->getFriendLoc(),
                     FirstFriend->getSourceRange(), FriendType)
            << FirstFriendType;
        ODRDiagNote(SecondFriend->getFriendLoc(),
                    SecondFriend->getSourceRange(), FriendType)
            << SecondFriendType;
        Diagnosed = true;
        break;
      }

      ODRDiagError(FirstFriend->getFriendLoc(), FirstFriend->getSourceRange(),
                   FriendTypeFunction)
          << (FirstTSI == nullptr);
      ODRDiagNote(SecondFriend->getFriendLoc(),
                  SecondFriend->getSourceRange(), FriendTypeFunction)
          << (SecondTSI == nullptr);

      Diagnosed = true;
      break;
    }
    case FunctionTemplate: {
      FunctionTemplateDecl *FirstTemplate =
          cast<FunctionTemplateDecl>(FirstDecl);
      FunctionTemplateDecl *SecondTemplate =
          cast<FunctionTemplateDecl>(SecondDecl);

      TemplateParameterList *FirstTPL =
          FirstTemplate->getTemplateParameters();
      TemplateParameterList *SecondTPL =
          SecondTemplate->getTemplateParameters();

      if (FirstTPL->size() != SecondTPL->size()) {
        ODRDiagError(FirstTemplate->getLocation(),
                     FirstTemplate->getSourceRange(),
                     FunctionTemplateDifferentNumberParameters)
            << FirstTemplate << FirstTPL->size();
        ODRDiagNote(SecondTemplate->getLocation(),
                    SecondTemplate->getSourceRange(),
                    FunctionTemplateDifferentNumberParameters)
            << SecondTemplate  << SecondTPL->size();

        Diagnosed = true;
        break;
      }

      bool ParameterMismatch = false;
      for (unsigned i = 0, e = FirstTPL->size(); i != e; ++i) {
        NamedDecl *FirstParam = FirstTPL->getParam(i);
        NamedDecl *SecondParam = SecondTPL->getParam(i);

        if (FirstParam->getKind() != SecondParam->getKind()) {
          enum {
            TemplateTypeParameter,
            NonTypeTemplateParameter,
            TemplateTemplateParameter,
          };
          auto GetParamType = [](NamedDecl *D) {
            switch (D->getKind()) {
              default:
                llvm_unreachable("Unexpected template parameter type")::llvm::llvm_unreachable_internal("Unexpected template parameter type"
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 11433);
              case Decl::TemplateTypeParm:
                return TemplateTypeParameter;
              case Decl::NonTypeTemplateParm:
                return NonTypeTemplateParameter;
              case Decl::TemplateTemplateParm:
                return TemplateTemplateParameter;
            }
          };

          ODRDiagError(FirstTemplate->getLocation(),
                       FirstTemplate->getSourceRange(),
                       FunctionTemplateParameterDifferentKind)
              << FirstTemplate << (i + 1) << GetParamType(FirstParam);
          ODRDiagNote(SecondTemplate->getLocation(),
                      SecondTemplate->getSourceRange(),
                      FunctionTemplateParameterDifferentKind)
              << SecondTemplate << (i + 1) << GetParamType(SecondParam);

          ParameterMismatch = true;
          break;
        }

        if (FirstParam->getName() != SecondParam->getName()) {
          ODRDiagError(FirstTemplate->getLocation(),
                       FirstTemplate->getSourceRange(),
                       FunctionTemplateParameterName)
              << FirstTemplate << (i + 1) << (bool)FirstParam->getIdentifier()
              << FirstParam;
          ODRDiagNote(SecondTemplate->getLocation(),
                      SecondTemplate->getSourceRange(),
                      FunctionTemplateParameterName)
              << SecondTemplate << (i + 1)
              << (bool)SecondParam->getIdentifier() << SecondParam;
          ParameterMismatch = true;
          break;
        }

        if (isa<TemplateTypeParmDecl>(FirstParam) &&
            isa<TemplateTypeParmDecl>(SecondParam)) {
          TemplateTypeParmDecl *FirstTTPD =
              cast<TemplateTypeParmDecl>(FirstParam);
          TemplateTypeParmDecl *SecondTTPD =
              cast<TemplateTypeParmDecl>(SecondParam);
          bool HasFirstDefaultArgument =
              FirstTTPD->hasDefaultArgument() &&
              !FirstTTPD->defaultArgumentWasInherited();
          bool HasSecondDefaultArgument =
              SecondTTPD->hasDefaultArgument() &&
              !SecondTTPD->defaultArgumentWasInherited();
          if (HasFirstDefaultArgument != HasSecondDefaultArgument) {
            ODRDiagError(FirstTemplate->getLocation(),
                         FirstTemplate->getSourceRange(),
                         FunctionTemplateParameterSingleDefaultArgument)
                << FirstTemplate << (i + 1) << HasFirstDefaultArgument;
            ODRDiagNote(SecondTemplate->getLocation(),
                        SecondTemplate->getSourceRange(),
                        FunctionTemplateParameterSingleDefaultArgument)
                << SecondTemplate << (i + 1) << HasSecondDefaultArgument;
            ParameterMismatch = true;
            break;
          }

          if (HasFirstDefaultArgument && HasSecondDefaultArgument) {
            QualType FirstType = FirstTTPD->getDefaultArgument();
            QualType SecondType = SecondTTPD->getDefaultArgument();
            if (ComputeQualTypeODRHash(FirstType) !=
                ComputeQualTypeODRHash(SecondType)) {
              ODRDiagError(FirstTemplate->getLocation(),
                           FirstTemplate->getSourceRange(),
                           FunctionTemplateParameterDifferentDefaultArgument)
                  << FirstTemplate << (i + 1) << FirstType;
              ODRDiagNote(SecondTemplate->getLocation(),
                          SecondTemplate->getSourceRange(),
                          FunctionTemplateParameterDifferentDefaultArgument)
                  << SecondTemplate << (i + 1) << SecondType;
              ParameterMismatch = true;
              break;
            }
          }

          if (FirstTTPD->isParameterPack() !=
              SecondTTPD->isParameterPack()) {
            ODRDiagError(FirstTemplate->getLocation(),
                         FirstTemplate->getSourceRange(),
                         FunctionTemplatePackParameter)
                << FirstTemplate << (i + 1) << FirstTTPD->isParameterPack();
            ODRDiagNote(SecondTemplate->getLocation(),
                        SecondTemplate->getSourceRange(),
                        FunctionTemplatePackParameter)
                << SecondTemplate << (i + 1) << SecondTTPD->isParameterPack();
            ParameterMismatch = true;
            break;
          }
        }

        if (isa<TemplateTemplateParmDecl>(FirstParam) &&
            isa<TemplateTemplateParmDecl>(SecondParam)) {
          TemplateTemplateParmDecl *FirstTTPD =
              cast<TemplateTemplateParmDecl>(FirstParam);
          TemplateTemplateParmDecl *SecondTTPD =
              cast<TemplateTemplateParmDecl>(SecondParam);

          TemplateParameterList *FirstTPL =
              FirstTTPD->getTemplateParameters();
          TemplateParameterList *SecondTPL =
              SecondTTPD->getTemplateParameters();

          if (ComputeTemplateParameterListODRHash(FirstTPL) !=
              ComputeTemplateParameterListODRHash(SecondTPL)) {
            ODRDiagError(FirstTemplate->getLocation(),
                         FirstTemplate->getSourceRange(),
                         FunctionTemplateParameterDifferentType)
                << FirstTemplate << (i + 1);
            ODRDiagNote(SecondTemplate->getLocation(),
                        SecondTemplate->getSourceRange(),
                        FunctionTemplateParameterDifferentType)
                << SecondTemplate << (i + 1);
            ParameterMismatch = true;
            break;
          }

          bool HasFirstDefaultArgument =
              FirstTTPD->hasDefaultArgument() &&
              !FirstTTPD->defaultArgumentWasInherited();
          bool HasSecondDefaultArgument =
              SecondTTPD->hasDefaultArgument() &&
              !SecondTTPD->defaultArgumentWasInherited();
          if (HasFirstDefaultArgument != HasSecondDefaultArgument) {
            ODRDiagError(FirstTemplate->getLocation(),
                         FirstTemplate->getSourceRange(),
                         FunctionTemplateParameterSingleDefaultArgument)
                << FirstTemplate << (i + 1) << HasFirstDefaultArgument;
            ODRDiagNote(SecondTemplate->getLocation(),
                        SecondTemplate->getSourceRange(),
                        FunctionTemplateParameterSingleDefaultArgument)
                << SecondTemplate << (i + 1) << HasSecondDefaultArgument;
            ParameterMismatch = true;
            break;
          }

          if (HasFirstDefaultArgument && HasSecondDefaultArgument) {
            TemplateArgument FirstTA =
                FirstTTPD->getDefaultArgument().getArgument();
            TemplateArgument SecondTA =
                SecondTTPD->getDefaultArgument().getArgument();
            if (ComputeTemplateArgumentODRHash(FirstTA) !=
                ComputeTemplateArgumentODRHash(SecondTA)) {
              ODRDiagError(FirstTemplate->getLocation(),
                           FirstTemplate->getSourceRange(),
                           FunctionTemplateParameterDifferentDefaultArgument)
                  << FirstTemplate << (i + 1) << FirstTA;
              ODRDiagNote(SecondTemplate->getLocation(),
                          SecondTemplate->getSourceRange(),
                          FunctionTemplateParameterDifferentDefaultArgument)
                  << SecondTemplate << (i + 1) << SecondTA;
              ParameterMismatch = true;
              break;
            }
          }

          if (FirstTTPD->isParameterPack() !=
              SecondTTPD->isParameterPack()) {
            ODRDiagError(FirstTemplate->getLocation(),
                         FirstTemplate->getSourceRange(),
                         FunctionTemplatePackParameter)
                << FirstTemplate << (i + 1) << FirstTTPD->isParameterPack();
            ODRDiagNote(SecondTemplate->getLocation(),
                        SecondTemplate->getSourceRange(),
                        FunctionTemplatePackParameter)
                << SecondTemplate << (i + 1) << SecondTTPD->isParameterPack();
            ParameterMismatch = true;
            break;
          }
        }

        if (isa<NonTypeTemplateParmDecl>(FirstParam) &&
            isa<NonTypeTemplateParmDecl>(SecondParam)) {
          NonTypeTemplateParmDecl *FirstNTTPD =
              cast<NonTypeTemplateParmDecl>(FirstParam);
          NonTypeTemplateParmDecl *SecondNTTPD =
              cast<NonTypeTemplateParmDecl>(SecondParam);

          QualType FirstType = FirstNTTPD->getType();
          QualType SecondType = SecondNTTPD->getType();
          if (ComputeQualTypeODRHash(FirstType) !=
              ComputeQualTypeODRHash(SecondType)) {
            ODRDiagError(FirstTemplate->getLocation(),
                         FirstTemplate->getSourceRange(),
                         FunctionTemplateParameterDifferentType)
                << FirstTemplate << (i + 1);
            ODRDiagNote(SecondTemplate->getLocation(),
                        SecondTemplate->getSourceRange(),
                        FunctionTemplateParameterDifferentType)
                << SecondTemplate << (i + 1);
            ParameterMismatch = true;
            break;
          }

          bool HasFirstDefaultArgument =
              FirstNTTPD->hasDefaultArgument() &&
              !FirstNTTPD->defaultArgumentWasInherited();
          bool HasSecondDefaultArgument =
              SecondNTTPD->hasDefaultArgument() &&
              !SecondNTTPD->defaultArgumentWasInherited();
          if (HasFirstDefaultArgument != HasSecondDefaultArgument) {
            ODRDiagError(FirstTemplate->getLocation(),
                         FirstTemplate->getSourceRange(),
                         FunctionTemplateParameterSingleDefaultArgument)
                << FirstTemplate << (i + 1) << HasFirstDefaultArgument;
            ODRDiagNote(SecondTemplate->getLocation(),
                        SecondTemplate->getSourceRange(),
                        FunctionTemplateParameterSingleDefaultArgument)
                << SecondTemplate << (i + 1) << HasSecondDefaultArgument;
            ParameterMismatch = true;
            break;
          }

          if (HasFirstDefaultArgument && HasSecondDefaultArgument) {
            Expr *FirstDefaultArgument = FirstNTTPD->getDefaultArgument();
            Expr *SecondDefaultArgument = SecondNTTPD->getDefaultArgument();
            if (ComputeODRHash(FirstDefaultArgument) !=
                ComputeODRHash(SecondDefaultArgument)) {
              ODRDiagError(FirstTemplate->getLocation(),
                           FirstTemplate->getSourceRange(),
                           FunctionTemplateParameterDifferentDefaultArgument)
                  << FirstTemplate << (i + 1) << FirstDefaultArgument;
              ODRDiagNote(SecondTemplate->getLocation(),
                          SecondTemplate->getSourceRange(),
                          FunctionTemplateParameterDifferentDefaultArgument)
                  << SecondTemplate << (i + 1) << SecondDefaultArgument;
              ParameterMismatch = true;
              break;
            }
          }

          if (FirstNTTPD->isParameterPack() !=
              SecondNTTPD->isParameterPack()) {
            ODRDiagError(FirstTemplate->getLocation(),
                         FirstTemplate->getSourceRange(),
                         FunctionTemplatePackParameter)
                << FirstTemplate << (i + 1) << FirstNTTPD->isParameterPack();
            ODRDiagNote(SecondTemplate->getLocation(),
                        SecondTemplate->getSourceRange(),
                        FunctionTemplatePackParameter)
                << SecondTemplate << (i + 1)
                << SecondNTTPD->isParameterPack();
            ParameterMismatch = true;
            break;
          }
        }
      }

      if (ParameterMismatch) {
        Diagnosed = true;
        break;
      }

      break;
    }
    }

    if (Diagnosed)
      continue;

    Diag(FirstDecl->getLocation(),
         diag::err_module_odr_violation_mismatch_decl_unknown)
        << FirstRecord << FirstModule.empty() << FirstModule << FirstDiffType
        << FirstDecl->getSourceRange();
    Diag(SecondDecl->getLocation(),
         diag::note_module_odr_violation_mismatch_decl_unknown)
        << SecondModule << FirstDiffType << SecondDecl->getSourceRange();
    Diagnosed = true;
  }

  if (!Diagnosed) {
    // All definitions are updates to the same declaration. This happens if a
    // module instantiates the declaration of a class template specialization
    // and two or more other modules instantiate its definition.
    //
    // FIXME: Indicate which modules had instantiations of this definition.
    // FIXME: How can this even happen?
    Diag(Merge.first->getLocation(),
         diag::err_module_odr_violation_different_instantiations)
      << Merge.first;
  }
}

// Issue ODR failures diagnostics for functions.
for (auto &Merge : FunctionOdrMergeFailures) {
  enum ODRFunctionDifference {
    ReturnType,
    ParameterName,
    ParameterType,
    ParameterSingleDefaultArgument,
    ParameterDifferentDefaultArgument,
    FunctionBody,
  };

  FunctionDecl *FirstFunction = Merge.first;
  std::string FirstModule = getOwningModuleNameForDiagnostic(FirstFunction);

  bool Diagnosed = false;
  for (auto &SecondFunction : Merge.second) {

    if (FirstFunction == SecondFunction)
      continue;

    std::string SecondModule =
        getOwningModuleNameForDiagnostic(SecondFunction);

    auto ODRDiagError = [FirstFunction, &FirstModule,
                         this](SourceLocation Loc, SourceRange Range,
                               ODRFunctionDifference DiffType) {
      return Diag(Loc, diag::err_module_odr_violation_function)
             << FirstFunction << FirstModule.empty() << FirstModule << Range
             << DiffType;
    };
    auto ODRDiagNote = [&SecondModule, this](SourceLocation Loc,
                                             SourceRange Range,
                                             ODRFunctionDifference DiffType) {
      return Diag(Loc, diag::note_module_odr_violation_function)
             << SecondModule << Range << DiffType;
    };

    if (ComputeQualTypeODRHash(FirstFunction->getReturnType()) !=
        ComputeQualTypeODRHash(SecondFunction->getReturnType())) {
      ODRDiagError(FirstFunction->getReturnTypeSourceRange().getBegin(),
                   FirstFunction->getReturnTypeSourceRange(), ReturnType)
          << FirstFunction->getReturnType();
      ODRDiagNote(SecondFunction->getReturnTypeSourceRange().getBegin(),
                  SecondFunction->getReturnTypeSourceRange(), ReturnType)
          << SecondFunction->getReturnType();
      Diagnosed = true;
      break;
    }

    assert(FirstFunction->param_size() == SecondFunction->param_size() &&((FirstFunction->param_size() == SecondFunction->param_size
() && "Merged functions with different number of parameters"
) ? static_cast<void> (0) : __assert_fail ("FirstFunction->param_size() == SecondFunction->param_size() && \"Merged functions with different number of parameters\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 11771, __PRETTY_FUNCTION__))
           "Merged functions with different number of parameters")((FirstFunction->param_size() == SecondFunction->param_size
() && "Merged functions with different number of parameters"
) ? static_cast<void> (0) : __assert_fail ("FirstFunction->param_size() == SecondFunction->param_size() && \"Merged functions with different number of parameters\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 11771, __PRETTY_FUNCTION__));

    auto ParamSize = FirstFunction->param_size();
    bool ParameterMismatch = false;
    for (unsigned I = 0; I < ParamSize; ++I) {
      auto *FirstParam = FirstFunction->getParamDecl(I);
      auto *SecondParam = SecondFunction->getParamDecl(I);

      assert(getContext().hasSameType(FirstParam->getType(),((getContext().hasSameType(FirstParam->getType(), SecondParam
->getType()) && "Merged function has different parameter types."
) ? static_cast<void> (0) : __assert_fail ("getContext().hasSameType(FirstParam->getType(), SecondParam->getType()) && \"Merged function has different parameter types.\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 11781, __PRETTY_FUNCTION__))
                                    SecondParam->getType()) &&((getContext().hasSameType(FirstParam->getType(), SecondParam
->getType()) && "Merged function has different parameter types."
) ? static_cast<void> (0) : __assert_fail ("getContext().hasSameType(FirstParam->getType(), SecondParam->getType()) && \"Merged function has different parameter types.\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 11781, __PRETTY_FUNCTION__))
             "Merged function has different parameter types.")((getContext().hasSameType(FirstParam->getType(), SecondParam
->getType()) && "Merged function has different parameter types."
) ? static_cast<void> (0) : __assert_fail ("getContext().hasSameType(FirstParam->getType(), SecondParam->getType()) && \"Merged function has different parameter types.\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 11781, __PRETTY_FUNCTION__));

      if (FirstParam->getDeclName() != SecondParam->getDeclName()) {
        ODRDiagError(FirstParam->getLocation(), FirstParam->getSourceRange(),
                     ParameterName)
            << I + 1 << FirstParam->getDeclName();
        ODRDiagNote(SecondParam->getLocation(), SecondParam->getSourceRange(),
                    ParameterName)
            << I + 1 << SecondParam->getDeclName();
        ParameterMismatch = true;
        break;
      };

      QualType FirstParamType = FirstParam->getType();
      QualType SecondParamType = SecondParam->getType();
      if (FirstParamType != SecondParamType &&
          ComputeQualTypeODRHash(FirstParamType) !=
              ComputeQualTypeODRHash(SecondParamType)) {
        if (const DecayedType *ParamDecayedType =
                FirstParamType->getAs<DecayedType>()) {
          ODRDiagError(FirstParam->getLocation(),
                       FirstParam->getSourceRange(), ParameterType)
              << (I + 1) << FirstParamType << true
              << ParamDecayedType->getOriginalType();
        } else {
          ODRDiagError(FirstParam->getLocation(),
                       FirstParam->getSourceRange(), ParameterType)
              << (I + 1) << FirstParamType << false;
        }

        if (const DecayedType *ParamDecayedType =
                SecondParamType->getAs<DecayedType>()) {
          ODRDiagNote(SecondParam->getLocation(),
                      SecondParam->getSourceRange(), ParameterType)
              << (I + 1) << SecondParamType << true
              << ParamDecayedType->getOriginalType();
        } else {
          ODRDiagNote(SecondParam->getLocation(),
                      SecondParam->getSourceRange(), ParameterType)
              << (I + 1) << SecondParamType << false;
        }
        ParameterMismatch = true;
        break;
      }

      const Expr *FirstInit = FirstParam->getInit();
      const Expr *SecondInit = SecondParam->getInit();
      if ((FirstInit == nullptr) != (SecondInit == nullptr)) {
        ODRDiagError(FirstParam->getLocation(), FirstParam->getSourceRange(),
                     ParameterSingleDefaultArgument)
            << (I + 1) << (FirstInit == nullptr)
            << (FirstInit ? FirstInit->getSourceRange() : SourceRange());
        ODRDiagNote(SecondParam->getLocation(), SecondParam->getSourceRange(),
                    ParameterSingleDefaultArgument)
            << (I + 1) << (SecondInit == nullptr)
            << (SecondInit ? SecondInit->getSourceRange() : SourceRange());
        ParameterMismatch = true;
        break;
      }

      if (FirstInit && SecondInit &&
          ComputeODRHash(FirstInit) != ComputeODRHash(SecondInit)) {
        ODRDiagError(FirstParam->getLocation(), FirstParam->getSourceRange(),
                     ParameterDifferentDefaultArgument)
            << (I + 1) << FirstInit->getSourceRange();
        ODRDiagNote(SecondParam->getLocation(), SecondParam->getSourceRange(),
                    ParameterDifferentDefaultArgument)
            << (I + 1) << SecondInit->getSourceRange();
        ParameterMismatch = true;
        break;
      }

      assert(ComputeSubDeclODRHash(FirstParam) ==((ComputeSubDeclODRHash(FirstParam) == ComputeSubDeclODRHash(
SecondParam) && "Undiagnosed parameter difference.") ?
 static_cast<void> (0) : __assert_fail ("ComputeSubDeclODRHash(FirstParam) == ComputeSubDeclODRHash(SecondParam) && \"Undiagnosed parameter difference.\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 11855, __PRETTY_FUNCTION__))
                 ComputeSubDeclODRHash(SecondParam) &&((ComputeSubDeclODRHash(FirstParam) == ComputeSubDeclODRHash(
SecondParam) && "Undiagnosed parameter difference.") ?
 static_cast<void> (0) : __assert_fail ("ComputeSubDeclODRHash(FirstParam) == ComputeSubDeclODRHash(SecondParam) && \"Undiagnosed parameter difference.\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 11855, __PRETTY_FUNCTION__))
             "Undiagnosed parameter difference.")((ComputeSubDeclODRHash(FirstParam) == ComputeSubDeclODRHash(
SecondParam) && "Undiagnosed parameter difference.") ?
 static_cast<void> (0) : __assert_fail ("ComputeSubDeclODRHash(FirstParam) == ComputeSubDeclODRHash(SecondParam) && \"Undiagnosed parameter difference.\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 11855, __PRETTY_FUNCTION__));
    }

    if (ParameterMismatch) {
      Diagnosed = true;
      break;
    }

    // If no error has been generated before now, assume the problem is in
    // the body and generate a message.
    ODRDiagError(FirstFunction->getLocation(),
                 FirstFunction->getSourceRange(), FunctionBody);
    ODRDiagNote(SecondFunction->getLocation(),
                SecondFunction->getSourceRange(), FunctionBody);
    Diagnosed = true;
    break;
  }
  (void)Diagnosed;
  assert(Diagnosed && "Unable to emit ODR diagnostic.")((Diagnosed && "Unable to emit ODR diagnostic.") ? static_cast
<void> (0) : __assert_fail ("Diagnosed && \"Unable to emit ODR diagnostic.\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 11873, __PRETTY_FUNCTION__));
}

// Issue ODR failures diagnostics for enums.
for (auto &Merge : EnumOdrMergeFailures) {
  enum ODREnumDifference {
    SingleScopedEnum,
    EnumTagKeywordMismatch,
    SingleSpecifiedType,
    DifferentSpecifiedTypes,
    DifferentNumberEnumConstants,
    EnumConstantName,
    EnumConstantSingleInitilizer,
    EnumConstantDifferentInitilizer,
  };

  // If we've already pointed out a specific problem with this enum, don't
  // bother issuing a general "something's different" diagnostic.
  if (!DiagnosedOdrMergeFailures.insert(Merge.first).second)
    continue;

  EnumDecl *FirstEnum = Merge.first;
  std::string FirstModule = getOwningModuleNameForDiagnostic(FirstEnum);

  using DeclHashes =
      llvm::SmallVector<std::pair<EnumConstantDecl *, unsigned>, 4>;
  auto PopulateHashes = [&ComputeSubDeclODRHash, FirstEnum](
                            DeclHashes &Hashes, EnumDecl *Enum) {
    for (auto *D : Enum->decls()) {
      // Due to decl merging, the first EnumDecl is the parent of
      // Decls in both records.
      if (!ODRHash::isWhitelistedDecl(D, FirstEnum))
        continue;
      assert(isa<EnumConstantDecl>(D) && "Unexpected Decl kind")((isa<EnumConstantDecl>(D) && "Unexpected Decl kind"
) ? static_cast<void> (0) : __assert_fail ("isa<EnumConstantDecl>(D) && \"Unexpected Decl kind\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 11906, __PRETTY_FUNCTION__));
      Hashes.emplace_back(cast<EnumConstantDecl>(D),
                          ComputeSubDeclODRHash(D));
    }
  };
  DeclHashes FirstHashes;
  PopulateHashes(FirstHashes, FirstEnum);
  bool Diagnosed = false;
  for (auto &SecondEnum : Merge.second) {

    if (FirstEnum == SecondEnum)
      continue;

    std::string SecondModule =
        getOwningModuleNameForDiagnostic(SecondEnum);

    auto ODRDiagError = [FirstEnum, &FirstModule,
                         this](SourceLocation Loc, SourceRange Range,
                               ODREnumDifference DiffType) {
      return Diag(Loc, diag::err_module_odr_violation_enum)
             << FirstEnum << FirstModule.empty() << FirstModule << Range
             << DiffType;
    };
    auto ODRDiagNote = [&SecondModule, this](SourceLocation Loc,
                                             SourceRange Range,
                                             ODREnumDifference DiffType) {
      return Diag(Loc, diag::note_module_odr_violation_enum)
             << SecondModule << Range << DiffType;
    };

    if (FirstEnum->isScoped() != SecondEnum->isScoped()) {
      ODRDiagError(FirstEnum->getLocation(), FirstEnum->getSourceRange(),
                   SingleScopedEnum)
          << FirstEnum->isScoped();
      ODRDiagNote(SecondEnum->getLocation(), SecondEnum->getSourceRange(),
                  SingleScopedEnum)
          << SecondEnum->isScoped();
      Diagnosed = true;
      continue;
    }

    if (FirstEnum->isScoped() && SecondEnum->isScoped()) {
      if (FirstEnum->isScopedUsingClassTag() !=
          SecondEnum->isScopedUsingClassTag()) {
        ODRDiagError(FirstEnum->getLocation(), FirstEnum->getSourceRange(),
                     EnumTagKeywordMismatch)
            << FirstEnum->isScopedUsingClassTag();
        ODRDiagNote(SecondEnum->getLocation(), SecondEnum->getSourceRange(),
                    EnumTagKeywordMismatch)
            << SecondEnum->isScopedUsingClassTag();
        Diagnosed = true;
        continue;
      }
    }

    QualType FirstUnderlyingType =
        FirstEnum->getIntegerTypeSourceInfo()
            ? FirstEnum->getIntegerTypeSourceInfo()->getType()
            : QualType();
    QualType SecondUnderlyingType =
        SecondEnum->getIntegerTypeSourceInfo()
            ? SecondEnum->getIntegerTypeSourceInfo()->getType()
            : QualType();
    if (FirstUnderlyingType.isNull() != SecondUnderlyingType.isNull()) {
        ODRDiagError(FirstEnum->getLocation(), FirstEnum->getSourceRange(),
                     SingleSpecifiedType)
            << !FirstUnderlyingType.isNull();
        ODRDiagNote(SecondEnum->getLocation(), SecondEnum->getSourceRange(),
                    SingleSpecifiedType)
            << !SecondUnderlyingType.isNull();
        Diagnosed = true;
        continue;
    }

    if (!FirstUnderlyingType.isNull() && !SecondUnderlyingType.isNull()) {
      if (ComputeQualTypeODRHash(FirstUnderlyingType) !=
          ComputeQualTypeODRHash(SecondUnderlyingType)) {
        ODRDiagError(FirstEnum->getLocation(), FirstEnum->getSourceRange(),
                     DifferentSpecifiedTypes)
            << FirstUnderlyingType;
        ODRDiagNote(SecondEnum->getLocation(), SecondEnum->getSourceRange(),
                    DifferentSpecifiedTypes)
            << SecondUnderlyingType;
        Diagnosed = true;
        continue;
      }
    }

    DeclHashes SecondHashes;
    PopulateHashes(SecondHashes, SecondEnum);

    if (FirstHashes.size() != SecondHashes.size()) {
      ODRDiagError(FirstEnum->getLocation(), FirstEnum->getSourceRange(),
                   DifferentNumberEnumConstants)
          << (int)FirstHashes.size();
      ODRDiagNote(SecondEnum->getLocation(), SecondEnum->getSourceRange(),
                  DifferentNumberEnumConstants)
          << (int)SecondHashes.size();
      Diagnosed = true;
      continue;
    }

    for (unsigned I = 0; I < FirstHashes.size(); ++I) {
      if (FirstHashes[I].second == SecondHashes[I].second)
        continue;
      const EnumConstantDecl *FirstEnumConstant = FirstHashes[I].first;
      const EnumConstantDecl *SecondEnumConstant = SecondHashes[I].first;

      if (FirstEnumConstant->getDeclName() !=
          SecondEnumConstant->getDeclName()) {

        ODRDiagError(FirstEnumConstant->getLocation(),
                     FirstEnumConstant->getSourceRange(), EnumConstantName)
            << I + 1 << FirstEnumConstant;
        ODRDiagNote(SecondEnumConstant->getLocation(),
                    SecondEnumConstant->getSourceRange(), EnumConstantName)
            << I + 1 << SecondEnumConstant;
        Diagnosed = true;
        break;
      }

      const Expr *FirstInit = FirstEnumConstant->getInitExpr();
      const Expr *SecondInit = SecondEnumConstant->getInitExpr();
      if (!FirstInit && !SecondInit)
        continue;

      if (!FirstInit || !SecondInit) {
        ODRDiagError(FirstEnumConstant->getLocation(),
                     FirstEnumConstant->getSourceRange(),
                     EnumConstantSingleInitilizer)
            << I + 1 << FirstEnumConstant << (FirstInit != nullptr);
        ODRDiagNote(SecondEnumConstant->getLocation(),
                    SecondEnumConstant->getSourceRange(),
                    EnumConstantSingleInitilizer)
            << I + 1 << SecondEnumConstant << (SecondInit != nullptr);
        Diagnosed = true;
        break;
      }

      if (ComputeODRHash(FirstInit) != ComputeODRHash(SecondInit)) {
        ODRDiagError(FirstEnumConstant->getLocation(),
                     FirstEnumConstant->getSourceRange(),
                     EnumConstantDifferentInitilizer)
            << I + 1 << FirstEnumConstant;
        ODRDiagNote(SecondEnumConstant->getLocation(),
                    SecondEnumConstant->getSourceRange(),
                    EnumConstantDifferentInitilizer)
            << I + 1 << SecondEnumConstant;
        Diagnosed = true;
        break;
      }
    }
  }

  (void)Diagnosed;
  assert(Diagnosed && "Unable to emit ODR diagnostic.")((Diagnosed && "Unable to emit ODR diagnostic.") ? static_cast
<void> (0) : __assert_fail ("Diagnosed && \"Unable to emit ODR diagnostic.\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 12061, __PRETTY_FUNCTION__));
}
12063}

12065void ASTReader::StartedDeserializing() {
if (++NumCurrentElementsDeserializing == 1 && ReadTimer.get())
  ReadTimer->startTimer();
12068}

12070void ASTReader::FinishedDeserializing() {
assert(NumCurrentElementsDeserializing &&((NumCurrentElementsDeserializing && "FinishedDeserializing not paired with StartedDeserializing"
) ? static_cast<void> (0) : __assert_fail ("NumCurrentElementsDeserializing && \"FinishedDeserializing not paired with StartedDeserializing\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 12072, __PRETTY_FUNCTION__))
       "FinishedDeserializing not paired with StartedDeserializing")((NumCurrentElementsDeserializing && "FinishedDeserializing not paired with StartedDeserializing"
) ? static_cast<void> (0) : __assert_fail ("NumCurrentElementsDeserializing && \"FinishedDeserializing not paired with StartedDeserializing\""
, "/build/llvm-toolchain-snapshot-10~svn371925/tools/clang/lib/Serialization/ASTReader.cpp"
, 12072, __PRETTY_FUNCTION__));
if (NumCurrentElementsDeserializing == 1) {
  // We decrease NumCurrentElementsDeserializing only after pending actions
  // are finished, to avoid recursively re-calling finishPendingActions().
  finishPendingActions();
}
--NumCurrentElementsDeserializing;

if (NumCurrentElementsDeserializing == 0) {
  // Propagate exception specification and deduced type updates along
  // redeclaration chains.
  //
  // We do this now rather than in finishPendingActions because we want to
  // be able to walk the complete redeclaration chains of the updated decls.
  while (!PendingExceptionSpecUpdates.empty() ||
         !PendingDeducedTypeUpdates.empty()) {
    auto ESUpdates = std::move(PendingExceptionSpecUpdates);
    PendingExceptionSpecUpdates.clear();
    for (auto Update : ESUpdates) {
      ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
      auto *FPT = Update.second->getType()->castAs<FunctionProtoType>();
      auto ESI = FPT->getExtProtoInfo().ExceptionSpec;
      if (auto *Listener = getContext().getASTMutationListener())
        Listener->ResolvedExceptionSpec(cast<FunctionDecl>(Update.second));
      for (auto *Redecl : Update.second->redecls())
        getContext().adjustExceptionSpec(cast<FunctionDecl>(Redecl), ESI);
    }

    auto DTUpdates = std::move(PendingDeducedTypeUpdates);
    PendingDeducedTypeUpdates.clear();
    for (auto Update : DTUpdates) {
      ProcessingUpdatesRAIIObj ProcessingUpdates(*this);
      // FIXME: If the return type is already deduced, check that it matches.
      getContext().adjustDeducedFunctionResultType(Update.first,
                                                   Update.second);
    }
  }

  if (ReadTimer)
    ReadTimer->stopTimer();

  diagnoseOdrViolations();

  // We are not in recursive loading, so it's safe to pass the "interesting"
  // decls to the consumer.
  if (Consumer)
    PassInterestingDeclsToConsumer();
}
12120}

12122void ASTReader::pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name) {
if (IdentifierInfo *II = Name.getAsIdentifierInfo()) {
  // Remove any fake results before adding any real ones.
  auto It = PendingFakeLookupResults.find(II);
  if (It != PendingFakeLookupResults.end()) {
    for (auto *ND : It->second)
      SemaObj->IdResolver.RemoveDecl(ND);
    // FIXME: this works around module+PCH performance issue.
    // Rather than erase the result from the map, which is O(n), just clear
    // the vector of NamedDecls.
    It->second.clear();
  }
}

if (SemaObj->IdResolver.tryAddTopLevelDecl(D, Name) && SemaObj->TUScope) {
  SemaObj->TUScope->AddDecl(D);
} else if (SemaObj->TUScope) {
  // Adding the decl to IdResolver may have failed because it was already in
  // (even though it was not added in scope). If it is already in, make sure
  // it gets in the scope as well.
  if (std::find(SemaObj->IdResolver.begin(Name),
                SemaObj->IdResolver.end(), D) != SemaObj->IdResolver.end())
    SemaObj->TUScope->AddDecl(D);
}
12146}

12148ASTReader::ASTReader(Preprocessor &PP, InMemoryModuleCache &ModuleCache,
                   ASTContext *Context,
                   const PCHContainerReader &PCHContainerRdr,
                   ArrayRef<std::shared_ptr<ModuleFileExtension>> Extensions,
                   StringRef isysroot, bool DisableValidation,
                   bool AllowASTWithCompilerErrors,
                   bool AllowConfigurationMismatch, bool ValidateSystemInputs,
                   bool UseGlobalIndex,
                   std::unique_ptr<llvm::Timer> ReadTimer)
  : Listener(DisableValidation
                 ? cast<ASTReaderListener>(new SimpleASTReaderListener(PP))
                 : cast<ASTReaderListener>(new PCHValidator(PP, *this))),
    SourceMgr(PP.getSourceManager()), FileMgr(PP.getFileManager()),
    PCHContainerRdr(PCHContainerRdr), Diags(PP.getDiagnostics()), PP(PP),
    ContextObj(Context), ModuleMgr(PP.getFileManager(), ModuleCache,
                                   PCHContainerRdr, PP.getHeaderSearchInfo()),
    DummyIdResolver(PP), ReadTimer(std::move(ReadTimer)), isysroot(isysroot),
    DisableValidation(DisableValidation),
    AllowASTWithCompilerErrors(AllowASTWithCompilerErrors),
    AllowConfigurationMismatch(AllowConfigurationMismatch),
    ValidateSystemInputs(ValidateSystemInputs),
    UseGlobalIndex(UseGlobalIndex), CurrSwitchCaseStmts(&SwitchCaseStmts) {
SourceMgr.setExternalSLocEntrySource(this);

for (const auto &Ext : Extensions) {
  auto BlockName = Ext->getExtensionMetadata().BlockName;
  auto Known = ModuleFileExtensions.find(BlockName);
  if (Known != ModuleFileExtensions.end()) {
    Diags.Report(diag::warn_duplicate_module_file_extension)
      << BlockName;
    continue;
  }

  ModuleFileExtensions.insert({BlockName, Ext});
}
12183}

12185ASTReader::~ASTReader() {
if (OwnsDeserializationListener)
  delete DeserializationListener;
12188}

12190IdentifierResolver &ASTReader::getIdResolver() {
return SemaObj ? SemaObj->IdResolver : DummyIdResolver;
12192}

12194Expected<unsigned> ASTRecordReader::readRecord(llvm::BitstreamCursor &Cursor,
                                             unsigned AbbrevID) {
Idx = 0;
Record.clear();
return Cursor.readRecord(AbbrevID, Record);
12199}
12200//===----------------------------------------------------------------------===//
12201//// OMPClauseReader implementation
12202////===----------------------------------------------------------------------===//

12204OMPClause *OMPClauseReader::readClause() {
OMPClause *C;
1
'C' declared without an initial value→
switch (Record.readInt()) {
2
←
'Default' branch taken. Execution continues on line 12406→
case OMPC_if:
  C = new (Context) OMPIfClause();
  break;
case OMPC_final:
  C = new (Context) OMPFinalClause();
  break;
case OMPC_num_threads:
  C = new (Context) OMPNumThreadsClause();
  break;
case OMPC_safelen:
  C = new (Context) OMPSafelenClause();
  break;
case OMPC_simdlen:
  C = new (Context) OMPSimdlenClause();
  break;
case OMPC_allocator:
  C = new (Context) OMPAllocatorClause();
  break;
case OMPC_collapse:
  C = new (Context) OMPCollapseClause();
  break;
case OMPC_default:
  C = new (Context) OMPDefaultClause();
  break;
case OMPC_proc_bind:
  C = new (Context) OMPProcBindClause();
  break;
case OMPC_schedule:
  C = new (Context) OMPScheduleClause();
  break;
case OMPC_ordered:
  C = OMPOrderedClause::CreateEmpty(Context, Record.readInt());
  break;
case OMPC_nowait:
  C = new (Context) OMPNowaitClause();
  break;
case OMPC_untied:
  C = new (Context) OMPUntiedClause();
  break;
case OMPC_mergeable:
  C = new (Context) OMPMergeableClause();
  break;
case OMPC_read:
  C = new (Context) OMPReadClause();
  break;
case OMPC_write:
  C = new (Context) OMPWriteClause();
  break;
case OMPC_update:
  C = new (Context) OMPUpdateClause();
  break;
case OMPC_capture:
  C = new (Context) OMPCaptureClause();
  break;
case OMPC_seq_cst:
  C = new (Context) OMPSeqCstClause();
  break;
case OMPC_threads:
  C = new (Context) OMPThreadsClause();
  break;
case OMPC_simd:
  C = new (Context) OMPSIMDClause();
  break;
case OMPC_nogroup:
  C = new (Context) OMPNogroupClause();
  break;
case OMPC_unified_address:
  C = new (Context) OMPUnifiedAddressClause();
  break;
case OMPC_unified_shared_memory:
  C = new (Context) OMPUnifiedSharedMemoryClause();
  break;
case OMPC_reverse_offload:
  C = new (Context) OMPReverseOffloadClause();
  break;
case OMPC_dynamic_allocators:
  C = new (Context) OMPDynamicAllocatorsClause();
  break;
case OMPC_atomic_default_mem_order:
  C = new (Context) OMPAtomicDefaultMemOrderClause();
  break;
case OMPC_private:
  C = OMPPrivateClause::CreateEmpty(Context, Record.readInt());
  break;
case OMPC_firstprivate:
  C = OMPFirstprivateClause::CreateEmpty(Context, Record.readInt());
  break;
case OMPC_lastprivate:
  C = OMPLastprivateClause::CreateEmpty(Context, Record.readInt());
  break;
case OMPC_shared:
  C = OMPSharedClause::CreateEmpty(Context, Record.readInt());
  break;
case OMPC_reduction:
  C = OMPReductionClause::CreateEmpty(Context, Record.readInt());
  break;
case OMPC_task_reduction:
  C = OMPTaskReductionClause::CreateEmpty(Context, Record.readInt());
  break;
case OMPC_in_reduction:
  C = OMPInReductionClause::CreateEmpty(Context, Record.readInt());
  break;
case OMPC_linear:
  C = OMPLinearClause::CreateEmpty(Context, Record.readInt());
  break;
case OMPC_aligned:
  C = OMPAlignedClause::CreateEmpty(Context, Record.readInt());
  break;
case OMPC_copyin:
  C = OMPCopyinClause::CreateEmpty(Context, Record.readInt());
  break;
case OMPC_copyprivate:
  C = OMPCopyprivateClause::CreateEmpty(Context, Record.readInt());
  break;
case OMPC_flush:
  C = OMPFlushClause::CreateEmpty(Context, Record.readInt());
  break;
case OMPC_depend: {
  unsigned NumVars = Record.readInt();
  unsigned NumLoops = Record.readInt();
  C = OMPDependClause::CreateEmpty(Context, NumVars, NumLoops);
  break;
}
case OMPC_device:
  C = new (Context) OMPDeviceClause();
  break;
case OMPC_map: {
  OMPMappableExprListSizeTy Sizes;
  Sizes.NumVars = Record.readInt();
  Sizes.NumUniqueDeclarations = Record.readInt();
  Sizes.NumComponentLists = Record.readInt();
  Sizes.NumComponents = Record.readInt();
  C = OMPMapClause::CreateEmpty(Context, Sizes);
  break;
}
case OMPC_num_teams:
  C = new (Context) OMPNumTeamsClause();
  break;
case OMPC_thread_limit:
  C = new (Context) OMPThreadLimitClause();
  break;
case OMPC_priority:
  C = new (Context) OMPPriorityClause();
  break;
case OMPC_grainsize:
  C = new (Context) OMPGrainsizeClause();
  break;
case OMPC_num_tasks:
  C = new (Context) OMPNumTasksClause();
  break;
case OMPC_hint:
  C = new (Context) OMPHintClause();
  break;
case OMPC_dist_schedule:
  C = new (Context) OMPDistScheduleClause();
  break;
case OMPC_defaultmap:
  C = new (Context) OMPDefaultmapClause();
  break;
case OMPC_to: {
  OMPMappableExprListSizeTy Sizes;
  Sizes.NumVars = Record.readInt();
  Sizes.NumUniqueDeclarations = Record.readInt();
  Sizes.NumComponentLists = Record.readInt();
  Sizes.NumComponents = Record.readInt();
  C = OMPToClause::CreateEmpty(Context, Sizes);
  break;
}
case OMPC_from: {
  OMPMappableExprListSizeTy Sizes;
  Sizes.NumVars = Record.readInt();
  Sizes.NumUniqueDeclarations = Record.readInt();
  Sizes.NumComponentLists = Record.readInt();
  Sizes.NumComponents = Record.readInt();
  C = OMPFromClause::CreateEmpty(Context, Sizes);
  break;
}
case OMPC_use_device_ptr: {
  OMPMappableExprListSizeTy Sizes;
  Sizes.NumVars = Record.readInt();
  Sizes.NumUniqueDeclarations = Record.readInt();
  Sizes.NumComponentLists = Record.readInt();
  Sizes.NumComponents = Record.readInt();
  C = OMPUseDevicePtrClause::CreateEmpty(Context, Sizes);
  break;
}
case OMPC_is_device_ptr: {
  OMPMappableExprListSizeTy Sizes;
  Sizes.NumVars = Record.readInt();
  Sizes.NumUniqueDeclarations = Record.readInt();
  Sizes.NumComponentLists = Record.readInt();
  Sizes.NumComponents = Record.readInt();
  C = OMPIsDevicePtrClause::CreateEmpty(Context, Sizes);
  break;
}
case OMPC_allocate:
  C = OMPAllocateClause::CreateEmpty(Context, Record.readInt());
  break;
}
Visit(C);
3
←
1st function call argument is an uninitialized value
C->setLocStart(Record.readSourceLocation());
C->setLocEnd(Record.readSourceLocation());

return C;
12411}

12413void OMPClauseReader::VisitOMPClauseWithPreInit(OMPClauseWithPreInit *C) {
C->setPreInitStmt(Record.readSubStmt(),
                  static_cast<OpenMPDirectiveKind>(Record.readInt()));
12416}

12418void OMPClauseReader::VisitOMPClauseWithPostUpdate(OMPClauseWithPostUpdate *C) {
VisitOMPClauseWithPreInit(C);
C->setPostUpdateExpr(Record.readSubExpr());
12421}

12423void OMPClauseReader::VisitOMPIfClause(OMPIfClause *C) {
VisitOMPClauseWithPreInit(C);
C->setNameModifier(static_cast<OpenMPDirectiveKind>(Record.readInt()));
C->setNameModifierLoc(Record.readSourceLocation());
C->setColonLoc(Record.readSourceLocation());
C->setCondition(Record.readSubExpr());
C->setLParenLoc(Record.readSourceLocation());
12430}

12432void OMPClauseReader::VisitOMPFinalClause(OMPFinalClause *C) {
C->setCondition(Record.readSubExpr());
C->setLParenLoc(Record.readSourceLocation());
12435}

12437void OMPClauseReader::VisitOMPNumThreadsClause(OMPNumThreadsClause *C) {
VisitOMPClauseWithPreInit(C);
C->setNumThreads(Record.readSubExpr());
C->setLParenLoc(Record.readSourceLocation());
12441}

12443void OMPClauseReader::VisitOMPSafelenClause(OMPSafelenClause *C) {
C->setSafelen(Record.readSubExpr());
C->setLParenLoc(Record.readSourceLocation());
12446}

12448void OMPClauseReader::VisitOMPSimdlenClause(OMPSimdlenClause *C) {
C->setSimdlen(Record.readSubExpr());
C->setLParenLoc(Record.readSourceLocation());
12451}

12453void OMPClauseReader::VisitOMPAllocatorClause(OMPAllocatorClause *C) {
C->setAllocator(Record.readExpr());
C->setLParenLoc(Record.readSourceLocation());
12456}

12458void OMPClauseReader::VisitOMPCollapseClause(OMPCollapseClause *C) {
C->setNumForLoops(Record.readSubExpr());
C->setLParenLoc(Record.readSourceLocation());
12461}

12463void OMPClauseReader::VisitOMPDefaultClause(OMPDefaultClause *C) {
C->setDefaultKind(
     static_cast<OpenMPDefaultClauseKind>(Record.readInt()));
C->setLParenLoc(Record.readSourceLocation());
C->setDefaultKindKwLoc(Record.readSourceLocation());
12468}

12470void OMPClauseReader::VisitOMPProcBindClause(OMPProcBindClause *C) {
C->setProcBindKind(
     static_cast<OpenMPProcBindClauseKind>(Record.readInt()));
C->setLParenLoc(Record.readSourceLocation());
C->setProcBindKindKwLoc(Record.readSourceLocation());
12475}

12477void OMPClauseReader::VisitOMPScheduleClause(OMPScheduleClause *C) {
VisitOMPClauseWithPreInit(C);
C->setScheduleKind(
     static_cast<OpenMPScheduleClauseKind>(Record.readInt()));
C->setFirstScheduleModifier(
    static_cast<OpenMPScheduleClauseModifier>(Record.readInt()));
C->setSecondScheduleModifier(
    static_cast<OpenMPScheduleClauseModifier>(Record.readInt()));
C->setChunkSize(Record.readSubExpr());
C->setLParenLoc(Record.readSourceLocation());
C->setFirstScheduleModifierLoc(Record.readSourceLocation());
C->setSecondScheduleModifierLoc(Record.readSourceLocation());
C->setScheduleKindLoc(Record.readSourceLocation());
C->setCommaLoc(Record.readSourceLocation());
12491}

12493void OMPClauseReader::VisitOMPOrderedClause(OMPOrderedClause *C) {
C->setNumForLoops(Record.readSubExpr());
for (unsigned I = 0, E = C->NumberOfLoops; I < E; ++I)
  C->setLoopNumIterations(I, Record.readSubExpr());
for (unsigned I = 0, E = C->NumberOfLoops; I < E; ++I)
  C->setLoopCounter(I, Record.readSubExpr());
C->setLParenLoc(Record.readSourceLocation());
12500}

12502void OMPClauseReader::VisitOMPNowaitClause(OMPNowaitClause *) {}

12504void OMPClauseReader::VisitOMPUntiedClause(OMPUntiedClause *) {}

12506void OMPClauseReader::VisitOMPMergeableClause(OMPMergeableClause *) {}

12508void OMPClauseReader::VisitOMPReadClause(OMPReadClause *) {}

12510void OMPClauseReader::VisitOMPWriteClause(OMPWriteClause *) {}

12512void OMPClauseReader::VisitOMPUpdateClause(OMPUpdateClause *) {}

12514void OMPClauseReader::VisitOMPCaptureClause(OMPCaptureClause *) {}

12516void OMPClauseReader::VisitOMPSeqCstClause(OMPSeqCstClause *) {}

12518void OMPClauseReader::VisitOMPThreadsClause(OMPThreadsClause *) {}

12520void OMPClauseReader::VisitOMPSIMDClause(OMPSIMDClause *) {}

12522void OMPClauseReader::VisitOMPNogroupClause(OMPNogroupClause *) {}

12524void OMPClauseReader::VisitOMPUnifiedAddressClause(OMPUnifiedAddressClause *) {}

12526void OMPClauseReader::VisitOMPUnifiedSharedMemoryClause(
  OMPUnifiedSharedMemoryClause *) {}

12529void OMPClauseReader::VisitOMPReverseOffloadClause(OMPReverseOffloadClause *) {}

12531void
12532OMPClauseReader::VisitOMPDynamicAllocatorsClause(OMPDynamicAllocatorsClause *) {
12533}

12535void OMPClauseReader::VisitOMPAtomicDefaultMemOrderClause(
  OMPAtomicDefaultMemOrderClause *C) {
C->setAtomicDefaultMemOrderKind(
    static_cast<OpenMPAtomicDefaultMemOrderClauseKind>(Record.readInt()));
C->setLParenLoc(Record.readSourceLocation());
C->setAtomicDefaultMemOrderKindKwLoc(Record.readSourceLocation());
12541}

12543void OMPClauseReader::VisitOMPPrivateClause(OMPPrivateClause *C) {
C->setLParenLoc(Record.readSourceLocation());
unsigned NumVars = C->varlist_size();
SmallVector<Expr *, 16> Vars;
Vars.reserve(NumVars);
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setVarRefs(Vars);
Vars.clear();
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setPrivateCopies(Vars);
12555}

12557void OMPClauseReader::VisitOMPFirstprivateClause(OMPFirstprivateClause *C) {
VisitOMPClauseWithPreInit(C);
C->setLParenLoc(Record.readSourceLocation());
unsigned NumVars = C->varlist_size();
SmallVector<Expr *, 16> Vars;
Vars.reserve(NumVars);
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setVarRefs(Vars);
Vars.clear();
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setPrivateCopies(Vars);
Vars.clear();
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setInits(Vars);
12574}

12576void OMPClauseReader::VisitOMPLastprivateClause(OMPLastprivateClause *C) {
VisitOMPClauseWithPostUpdate(C);
C->setLParenLoc(Record.readSourceLocation());
unsigned NumVars = C->varlist_size();
SmallVector<Expr *, 16> Vars;
Vars.reserve(NumVars);
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setVarRefs(Vars);
Vars.clear();
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setPrivateCopies(Vars);
Vars.clear();
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setSourceExprs(Vars);
Vars.clear();
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setDestinationExprs(Vars);
Vars.clear();
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setAssignmentOps(Vars);
12601}

12603void OMPClauseReader::VisitOMPSharedClause(OMPSharedClause *C) {
C->setLParenLoc(Record.readSourceLocation());
unsigned NumVars = C->varlist_size();
SmallVector<Expr *, 16> Vars;
Vars.reserve(NumVars);
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setVarRefs(Vars);
12611}

12613void OMPClauseReader::VisitOMPReductionClause(OMPReductionClause *C) {
VisitOMPClauseWithPostUpdate(C);
C->setLParenLoc(Record.readSourceLocation());
C->setColonLoc(Record.readSourceLocation());
NestedNameSpecifierLoc NNSL = Record.readNestedNameSpecifierLoc();
DeclarationNameInfo DNI;
Record.readDeclarationNameInfo(DNI);
C->setQualifierLoc(NNSL);
C->setNameInfo(DNI);

unsigned NumVars = C->varlist_size();
SmallVector<Expr *, 16> Vars;
Vars.reserve(NumVars);
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setVarRefs(Vars);
Vars.clear();
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setPrivates(Vars);
Vars.clear();
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setLHSExprs(Vars);
Vars.clear();
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setRHSExprs(Vars);
Vars.clear();
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setReductionOps(Vars);
12645}

12647void OMPClauseReader::VisitOMPTaskReductionClause(OMPTaskReductionClause *C) {
VisitOMPClauseWithPostUpdate(C);
C->setLParenLoc(Record.readSourceLocation());
C->setColonLoc(Record.readSourceLocation());
NestedNameSpecifierLoc NNSL = Record.readNestedNameSpecifierLoc();
DeclarationNameInfo DNI;
Record.readDeclarationNameInfo(DNI);
C->setQualifierLoc(NNSL);
C->setNameInfo(DNI);

unsigned NumVars = C->varlist_size();
SmallVector<Expr *, 16> Vars;
Vars.reserve(NumVars);
for (unsigned I = 0; I != NumVars; ++I)
  Vars.push_back(Record.readSubExpr());
C->setVarRefs(Vars);
Vars.clear();
for (unsigned I = 0; I != NumVars; ++I)
  Vars.push_back(Record.readSubExpr());
C->setPrivates(Vars);
Vars.clear();
for (unsigned I = 0; I != NumVars; ++I)
  Vars.push_back(Record.readSubExpr());
C->setLHSExprs(Vars);
Vars.clear();
for (unsigned I = 0; I != NumVars; ++I)
  Vars.push_back(Record.readSubExpr());
C->setRHSExprs(Vars);
Vars.clear();
for (unsigned I = 0; I != NumVars; ++I)
  Vars.push_back(Record.readSubExpr());
C->setReductionOps(Vars);
12679}

12681void OMPClauseReader::VisitOMPInReductionClause(OMPInReductionClause *C) {
VisitOMPClauseWithPostUpdate(C);
C->setLParenLoc(Record.readSourceLocation());
C->setColonLoc(Record.readSourceLocation());
NestedNameSpecifierLoc NNSL = Record.readNestedNameSpecifierLoc();
DeclarationNameInfo DNI;
Record.readDeclarationNameInfo(DNI);
C->setQualifierLoc(NNSL);
C->setNameInfo(DNI);

unsigned NumVars = C->varlist_size();
SmallVector<Expr *, 16> Vars;
Vars.reserve(NumVars);
for (unsigned I = 0; I != NumVars; ++I)
  Vars.push_back(Record.readSubExpr());
C->setVarRefs(Vars);
Vars.clear();
for (unsigned I = 0; I != NumVars; ++I)
  Vars.push_back(Record.readSubExpr());
C->setPrivates(Vars);
Vars.clear();
for (unsigned I = 0; I != NumVars; ++I)
  Vars.push_back(Record.readSubExpr());
C->setLHSExprs(Vars);
Vars.clear();
for (unsigned I = 0; I != NumVars; ++I)
  Vars.push_back(Record.readSubExpr());
C->setRHSExprs(Vars);
Vars.clear();
for (unsigned I = 0; I != NumVars; ++I)
  Vars.push_back(Record.readSubExpr());
C->setReductionOps(Vars);
Vars.clear();
for (unsigned I = 0; I != NumVars; ++I)
  Vars.push_back(Record.readSubExpr());
C->setTaskgroupDescriptors(Vars);
12717}

12719void OMPClauseReader::VisitOMPLinearClause(OMPLinearClause *C) {
VisitOMPClauseWithPostUpdate(C);
C->setLParenLoc(Record.readSourceLocation());
C->setColonLoc(Record.readSourceLocation());
C->setModifier(static_cast<OpenMPLinearClauseKind>(Record.readInt()));
C->setModifierLoc(Record.readSourceLocation());
unsigned NumVars = C->varlist_size();
SmallVector<Expr *, 16> Vars;
Vars.reserve(NumVars);
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setVarRefs(Vars);
Vars.clear();
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setPrivates(Vars);
Vars.clear();
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setInits(Vars);
Vars.clear();
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setUpdates(Vars);
Vars.clear();
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setFinals(Vars);
C->setStep(Record.readSubExpr());
C->setCalcStep(Record.readSubExpr());
Vars.clear();
for (unsigned I = 0; I != NumVars + 1; ++I)
  Vars.push_back(Record.readSubExpr());
C->setUsedExprs(Vars);
12753}

12755void OMPClauseReader::VisitOMPAlignedClause(OMPAlignedClause *C) {
C->setLParenLoc(Record.readSourceLocation());
C->setColonLoc(Record.readSourceLocation());
unsigned NumVars = C->varlist_size();
SmallVector<Expr *, 16> Vars;
Vars.reserve(NumVars);
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setVarRefs(Vars);
C->setAlignment(Record.readSubExpr());
12765}

12767void OMPClauseReader::VisitOMPCopyinClause(OMPCopyinClause *C) {
C->setLParenLoc(Record.readSourceLocation());
unsigned NumVars = C->varlist_size();
SmallVector<Expr *, 16> Exprs;
Exprs.reserve(NumVars);
for (unsigned i = 0; i != NumVars; ++i)
  Exprs.push_back(Record.readSubExpr());
C->setVarRefs(Exprs);
Exprs.clear();
for (unsigned i = 0; i != NumVars; ++i)
  Exprs.push_back(Record.readSubExpr());
C->setSourceExprs(Exprs);
Exprs.clear();
for (unsigned i = 0; i != NumVars; ++i)
  Exprs.push_back(Record.readSubExpr());
C->setDestinationExprs(Exprs);
Exprs.clear();
for (unsigned i = 0; i != NumVars; ++i)
  Exprs.push_back(Record.readSubExpr());
C->setAssignmentOps(Exprs);
12787}

12789void OMPClauseReader::VisitOMPCopyprivateClause(OMPCopyprivateClause *C) {
C->setLParenLoc(Record.readSourceLocation());
unsigned NumVars = C->varlist_size();
SmallVector<Expr *, 16> Exprs;
Exprs.reserve(NumVars);
for (unsigned i = 0; i != NumVars; ++i)
  Exprs.push_back(Record.readSubExpr());
C->setVarRefs(Exprs);
Exprs.clear();
for (unsigned i = 0; i != NumVars; ++i)
  Exprs.push_back(Record.readSubExpr());
C->setSourceExprs(Exprs);
Exprs.clear();
for (unsigned i = 0; i != NumVars; ++i)
  Exprs.push_back(Record.readSubExpr());
C->setDestinationExprs(Exprs);
Exprs.clear();
for (unsigned i = 0; i != NumVars; ++i)
  Exprs.push_back(Record.readSubExpr());
C->setAssignmentOps(Exprs);
12809}

12811void OMPClauseReader::VisitOMPFlushClause(OMPFlushClause *C) {
C->setLParenLoc(Record.readSourceLocation());
unsigned NumVars = C->varlist_size();
SmallVector<Expr *, 16> Vars;
Vars.reserve(NumVars);
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setVarRefs(Vars);
12819}

12821void OMPClauseReader::VisitOMPDependClause(OMPDependClause *C) {
C->setLParenLoc(Record.readSourceLocation());
C->setDependencyKind(
    static_cast<OpenMPDependClauseKind>(Record.readInt()));
C->setDependencyLoc(Record.readSourceLocation());
C->setColonLoc(Record.readSourceLocation());
unsigned NumVars = C->varlist_size();
SmallVector<Expr *, 16> Vars;
Vars.reserve(NumVars);
for (unsigned I = 0; I != NumVars; ++I)
  Vars.push_back(Record.readSubExpr());
C->setVarRefs(Vars);
for (unsigned I = 0, E = C->getNumLoops(); I < E; ++I)
  C->setLoopData(I, Record.readSubExpr());
12835}

12837void OMPClauseReader::VisitOMPDeviceClause(OMPDeviceClause *C) {
VisitOMPClauseWithPreInit(C);
C->setDevice(Record.readSubExpr());
C->setLParenLoc(Record.readSourceLocation());
12841}

12843void OMPClauseReader::VisitOMPMapClause(OMPMapClause *C) {
C->setLParenLoc(Record.readSourceLocation());
for (unsigned I = 0; I < OMPMapClause::NumberOfModifiers; ++I) {
  C->setMapTypeModifier(
      I, static_cast<OpenMPMapModifierKind>(Record.readInt()));
  C->setMapTypeModifierLoc(I, Record.readSourceLocation());
}
C->setMapperQualifierLoc(Record.readNestedNameSpecifierLoc());
DeclarationNameInfo DNI;
Record.readDeclarationNameInfo(DNI);
C->setMapperIdInfo(DNI);
C->setMapType(
   static_cast<OpenMPMapClauseKind>(Record.readInt()));
C->setMapLoc(Record.readSourceLocation());
C->setColonLoc(Record.readSourceLocation());
auto NumVars = C->varlist_size();
auto UniqueDecls = C->getUniqueDeclarationsNum();
auto TotalLists = C->getTotalComponentListNum();
auto TotalComponents = C->getTotalComponentsNum();

SmallVector<Expr *, 16> Vars;
Vars.reserve(NumVars);
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readExpr());
C->setVarRefs(Vars);

SmallVector<Expr *, 16> UDMappers;
UDMappers.reserve(NumVars);
for (unsigned I = 0; I < NumVars; ++I)
  UDMappers.push_back(Record.readExpr());
C->setUDMapperRefs(UDMappers);

SmallVector<ValueDecl *, 16> Decls;
Decls.reserve(UniqueDecls);
for (unsigned i = 0; i < UniqueDecls; ++i)
  Decls.push_back(Record.readDeclAs<ValueDecl>());
C->setUniqueDecls(Decls);

SmallVector<unsigned, 16> ListsPerDecl;
ListsPerDecl.reserve(UniqueDecls);
for (unsigned i = 0; i < UniqueDecls; ++i)
  ListsPerDecl.push_back(Record.readInt());
C->setDeclNumLists(ListsPerDecl);

SmallVector<unsigned, 32> ListSizes;
ListSizes.reserve(TotalLists);
for (unsigned i = 0; i < TotalLists; ++i)
  ListSizes.push_back(Record.readInt());
C->setComponentListSizes(ListSizes);

SmallVector<OMPClauseMappableExprCommon::MappableComponent, 32> Components;
Components.reserve(TotalComponents);
for (unsigned i = 0; i < TotalComponents; ++i) {
  Expr *AssociatedExpr = Record.readExpr();
  auto *AssociatedDecl = Record.readDeclAs<ValueDecl>();
  Components.push_back(OMPClauseMappableExprCommon::MappableComponent(
      AssociatedExpr, AssociatedDecl));
}
C->setComponents(Components, ListSizes);
12902}

12904void OMPClauseReader::VisitOMPAllocateClause(OMPAllocateClause *C) {
C->setLParenLoc(Record.readSourceLocation());
C->setColonLoc(Record.readSourceLocation());
C->setAllocator(Record.readSubExpr());
unsigned NumVars = C->varlist_size();
SmallVector<Expr *, 16> Vars;
Vars.reserve(NumVars);
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setVarRefs(Vars);
12914}

12916void OMPClauseReader::VisitOMPNumTeamsClause(OMPNumTeamsClause *C) {
VisitOMPClauseWithPreInit(C);
C->setNumTeams(Record.readSubExpr());
C->setLParenLoc(Record.readSourceLocation());
12920}

12922void OMPClauseReader::VisitOMPThreadLimitClause(OMPThreadLimitClause *C) {
VisitOMPClauseWithPreInit(C);
C->setThreadLimit(Record.readSubExpr());
C->setLParenLoc(Record.readSourceLocation());
12926}

12928void OMPClauseReader::VisitOMPPriorityClause(OMPPriorityClause *C) {
C->setPriority(Record.readSubExpr());
C->setLParenLoc(Record.readSourceLocation());
12931}

12933void OMPClauseReader::VisitOMPGrainsizeClause(OMPGrainsizeClause *C) {
C->setGrainsize(Record.readSubExpr());
C->setLParenLoc(Record.readSourceLocation());
12936}

12938void OMPClauseReader::VisitOMPNumTasksClause(OMPNumTasksClause *C) {
C->setNumTasks(Record.readSubExpr());
C->setLParenLoc(Record.readSourceLocation());
12941}

12943void OMPClauseReader::VisitOMPHintClause(OMPHintClause *C) {
C->setHint(Record.readSubExpr());
C->setLParenLoc(Record.readSourceLocation());
12946}

12948void OMPClauseReader::VisitOMPDistScheduleClause(OMPDistScheduleClause *C) {
VisitOMPClauseWithPreInit(C);
C->setDistScheduleKind(
    static_cast<OpenMPDistScheduleClauseKind>(Record.readInt()));
C->setChunkSize(Record.readSubExpr());
C->setLParenLoc(Record.readSourceLocation());
C->setDistScheduleKindLoc(Record.readSourceLocation());
C->setCommaLoc(Record.readSourceLocation());
12956}

12958void OMPClauseReader::VisitOMPDefaultmapClause(OMPDefaultmapClause *C) {
C->setDefaultmapKind(
     static_cast<OpenMPDefaultmapClauseKind>(Record.readInt()));
C->setDefaultmapModifier(
    static_cast<OpenMPDefaultmapClauseModifier>(Record.readInt()));
C->setLParenLoc(Record.readSourceLocation());
C->setDefaultmapModifierLoc(Record.readSourceLocation());
C->setDefaultmapKindLoc(Record.readSourceLocation());
12966}

12968void OMPClauseReader::VisitOMPToClause(OMPToClause *C) {
C->setLParenLoc(Record.readSourceLocation());
C->setMapperQualifierLoc(Record.readNestedNameSpecifierLoc());
DeclarationNameInfo DNI;
Record.readDeclarationNameInfo(DNI);
C->setMapperIdInfo(DNI);
auto NumVars = C->varlist_size();
auto UniqueDecls = C->getUniqueDeclarationsNum();
auto TotalLists = C->getTotalComponentListNum();
auto TotalComponents = C->getTotalComponentsNum();

SmallVector<Expr *, 16> Vars;
Vars.reserve(NumVars);
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setVarRefs(Vars);

SmallVector<Expr *, 16> UDMappers;
UDMappers.reserve(NumVars);
for (unsigned I = 0; I < NumVars; ++I)
  UDMappers.push_back(Record.readSubExpr());
C->setUDMapperRefs(UDMappers);

SmallVector<ValueDecl *, 16> Decls;
Decls.reserve(UniqueDecls);
for (unsigned i = 0; i < UniqueDecls; ++i)
  Decls.push_back(Record.readDeclAs<ValueDecl>());
C->setUniqueDecls(Decls);

SmallVector<unsigned, 16> ListsPerDecl;
ListsPerDecl.reserve(UniqueDecls);
for (unsigned i = 0; i < UniqueDecls; ++i)
  ListsPerDecl.push_back(Record.readInt());
C->setDeclNumLists(ListsPerDecl);

SmallVector<unsigned, 32> ListSizes;
ListSizes.reserve(TotalLists);
for (unsigned i = 0; i < TotalLists; ++i)
  ListSizes.push_back(Record.readInt());
C->setComponentListSizes(ListSizes);

SmallVector<OMPClauseMappableExprCommon::MappableComponent, 32> Components;
Components.reserve(TotalComponents);
for (unsigned i = 0; i < TotalComponents; ++i) {
  Expr *AssociatedExpr = Record.readSubExpr();
  auto *AssociatedDecl = Record.readDeclAs<ValueDecl>();
  Components.push_back(OMPClauseMappableExprCommon::MappableComponent(
      AssociatedExpr, AssociatedDecl));
}
C->setComponents(Components, ListSizes);
13018}

13020void OMPClauseReader::VisitOMPFromClause(OMPFromClause *C) {
C->setLParenLoc(Record.readSourceLocation());
C->setMapperQualifierLoc(Record.readNestedNameSpecifierLoc());
DeclarationNameInfo DNI;
Record.readDeclarationNameInfo(DNI);
C->setMapperIdInfo(DNI);
auto NumVars = C->varlist_size();
auto UniqueDecls = C->getUniqueDeclarationsNum();
auto TotalLists = C->getTotalComponentListNum();
auto TotalComponents = C->getTotalComponentsNum();

SmallVector<Expr *, 16> Vars;
Vars.reserve(NumVars);
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setVarRefs(Vars);

SmallVector<Expr *, 16> UDMappers;
UDMappers.reserve(NumVars);
for (unsigned I = 0; I < NumVars; ++I)
  UDMappers.push_back(Record.readSubExpr());
C->setUDMapperRefs(UDMappers);

SmallVector<ValueDecl *, 16> Decls;
Decls.reserve(UniqueDecls);
for (unsigned i = 0; i < UniqueDecls; ++i)
  Decls.push_back(Record.readDeclAs<ValueDecl>());
C->setUniqueDecls(Decls);

SmallVector<unsigned, 16> ListsPerDecl;
ListsPerDecl.reserve(UniqueDecls);
for (unsigned i = 0; i < UniqueDecls; ++i)
  ListsPerDecl.push_back(Record.readInt());
C->setDeclNumLists(ListsPerDecl);

SmallVector<unsigned, 32> ListSizes;
ListSizes.reserve(TotalLists);
for (unsigned i = 0; i < TotalLists; ++i)
  ListSizes.push_back(Record.readInt());
C->setComponentListSizes(ListSizes);

SmallVector<OMPClauseMappableExprCommon::MappableComponent, 32> Components;
Components.reserve(TotalComponents);
for (unsigned i = 0; i < TotalComponents; ++i) {
  Expr *AssociatedExpr = Record.readSubExpr();
  auto *AssociatedDecl = Record.readDeclAs<ValueDecl>();
  Components.push_back(OMPClauseMappableExprCommon::MappableComponent(
      AssociatedExpr, AssociatedDecl));
}
C->setComponents(Components, ListSizes);
13070}

13072void OMPClauseReader::VisitOMPUseDevicePtrClause(OMPUseDevicePtrClause *C) {
C->setLParenLoc(Record.readSourceLocation());
auto NumVars = C->varlist_size();
auto UniqueDecls = C->getUniqueDeclarationsNum();
auto TotalLists = C->getTotalComponentListNum();
auto TotalComponents = C->getTotalComponentsNum();

SmallVector<Expr *, 16> Vars;
Vars.reserve(NumVars);
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setVarRefs(Vars);
Vars.clear();
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setPrivateCopies(Vars);
Vars.clear();
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setInits(Vars);

SmallVector<ValueDecl *, 16> Decls;
Decls.reserve(UniqueDecls);
for (unsigned i = 0; i < UniqueDecls; ++i)
  Decls.push_back(Record.readDeclAs<ValueDecl>());
C->setUniqueDecls(Decls);

SmallVector<unsigned, 16> ListsPerDecl;
ListsPerDecl.reserve(UniqueDecls);
for (unsigned i = 0; i < UniqueDecls; ++i)
  ListsPerDecl.push_back(Record.readInt());
C->setDeclNumLists(ListsPerDecl);

SmallVector<unsigned, 32> ListSizes;
ListSizes.reserve(TotalLists);
for (unsigned i = 0; i < TotalLists; ++i)
  ListSizes.push_back(Record.readInt());
C->setComponentListSizes(ListSizes);

SmallVector<OMPClauseMappableExprCommon::MappableComponent, 32> Components;
Components.reserve(TotalComponents);
for (unsigned i = 0; i < TotalComponents; ++i) {
  Expr *AssociatedExpr = Record.readSubExpr();
  auto *AssociatedDecl = Record.readDeclAs<ValueDecl>();
  Components.push_back(OMPClauseMappableExprCommon::MappableComponent(
      AssociatedExpr, AssociatedDecl));
}
C->setComponents(Components, ListSizes);
13120}

13122void OMPClauseReader::VisitOMPIsDevicePtrClause(OMPIsDevicePtrClause *C) {
C->setLParenLoc(Record.readSourceLocation());
auto NumVars = C->varlist_size();
auto UniqueDecls = C->getUniqueDeclarationsNum();
auto TotalLists = C->getTotalComponentListNum();
auto TotalComponents = C->getTotalComponentsNum();

SmallVector<Expr *, 16> Vars;
Vars.reserve(NumVars);
for (unsigned i = 0; i != NumVars; ++i)
  Vars.push_back(Record.readSubExpr());
C->setVarRefs(Vars);
Vars.clear();

SmallVector<ValueDecl *, 16> Decls;
Decls.reserve(UniqueDecls);
for (unsigned i = 0; i < UniqueDecls; ++i)
  Decls.push_back(Record.readDeclAs<ValueDecl>());
C->setUniqueDecls(Decls);

SmallVector<unsigned, 16> ListsPerDecl;
ListsPerDecl.reserve(UniqueDecls);
for (unsigned i = 0; i < UniqueDecls; ++i)
  ListsPerDecl.push_back(Record.readInt());
C->setDeclNumLists(ListsPerDecl);

SmallVector<unsigned, 32> ListSizes;
ListSizes.reserve(TotalLists);
for (unsigned i = 0; i < TotalLists; ++i)
  ListSizes.push_back(Record.readInt());
C->setComponentListSizes(ListSizes);

SmallVector<OMPClauseMappableExprCommon::MappableComponent, 32> Components;
Components.reserve(TotalComponents);
for (unsigned i = 0; i < TotalComponents; ++i) {
  Expr *AssociatedExpr = Record.readSubExpr();
  auto *AssociatedDecl = Record.readDeclAs<ValueDecl>();
  Components.push_back(OMPClauseMappableExprCommon::MappableComponent(
      AssociatedExpr, AssociatedDecl));
}
C->setComponents(Components, ListSizes);
13163}