/usr/src/gnu/usr.bin/clang/libclangSerialization/../../../llvm/llvm/include/llvm/Bitstream/BitstreamReader.h

Bug Summary

File:	src/gnu/usr.bin/clang/libclangSerialization/../../../llvm/llvm/include/llvm/Bitstream/BitstreamReader.h
Warning:	line 221, column 39 The result of the right shift is undefined due to shifting by '64', which is greater or equal to the width of type 'llvm::SimpleBitstreamCursor::word_t'

Annotated Source Code

Press '?' to see keyboard shortcuts

Show analyzer invocation

clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name ASTReaderStmt.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 -setup-static-analyzer -mrelocation-model static -mframe-pointer=all -relaxed-aliasing -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/gnu/usr.bin/clang/libclangSerialization/obj -resource-dir /usr/local/lib/clang/13.0.0 -I /usr/src/gnu/usr.bin/clang/libclangSerialization/../../../llvm/clang/include -I /usr/src/gnu/usr.bin/clang/libclangSerialization/../../../llvm/llvm/include -I /usr/src/gnu/usr.bin/clang/libclangSerialization/../include -I /usr/src/gnu/usr.bin/clang/libclangSerialization/obj -I /usr/src/gnu/usr.bin/clang/libclangSerialization/obj/../include -D NDEBUG -D __STDC_LIMIT_MACROS -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D LLVM_PREFIX="/usr" -internal-isystem /usr/include/c++/v1 -internal-isystem /usr/local/lib/clang/13.0.0/include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir=/usr/src/gnu/usr.bin/clang/libclangSerialization/obj -ferror-limit 19 -fvisibility-inlines-hidden -fwrapv -stack-protector 2 -fno-rtti -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/ben/Projects/vmm/scan-build/2022-01-12-194120-40624-1 -x c++ /usr/src/gnu/usr.bin/clang/libclangSerialization/../../../llvm/clang/lib/Serialization/ASTReaderStmt.cpp

/usr/src/gnu/usr.bin/clang/libclangSerialization/../../../llvm/clang/lib/Serialization/ASTReaderStmt.cpp

→

1//===- ASTReaderStmt.cpp - Stmt/Expr Deserialization ----------------------===//
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// Statement/expression deserialization.  This implements the
10// ASTReader::ReadStmt method.
11//
12//===----------------------------------------------------------------------===//

14#include "clang/AST/ASTConcept.h"
15#include "clang/AST/ASTContext.h"
16#include "clang/AST/AttrIterator.h"
17#include "clang/AST/Decl.h"
18#include "clang/AST/DeclAccessPair.h"
19#include "clang/AST/DeclCXX.h"
20#include "clang/AST/DeclGroup.h"
21#include "clang/AST/DeclObjC.h"
22#include "clang/AST/DeclTemplate.h"
23#include "clang/AST/DeclarationName.h"
24#include "clang/AST/DependenceFlags.h"
25#include "clang/AST/Expr.h"
26#include "clang/AST/ExprCXX.h"
27#include "clang/AST/ExprObjC.h"
28#include "clang/AST/ExprOpenMP.h"
29#include "clang/AST/NestedNameSpecifier.h"
30#include "clang/AST/OpenMPClause.h"
31#include "clang/AST/OperationKinds.h"
32#include "clang/AST/Stmt.h"
33#include "clang/AST/StmtCXX.h"
34#include "clang/AST/StmtObjC.h"
35#include "clang/AST/StmtOpenMP.h"
36#include "clang/AST/StmtVisitor.h"
37#include "clang/AST/TemplateBase.h"
38#include "clang/AST/Type.h"
39#include "clang/AST/UnresolvedSet.h"
40#include "clang/Basic/CapturedStmt.h"
41#include "clang/Basic/ExpressionTraits.h"
42#include "clang/Basic/LLVM.h"
43#include "clang/Basic/Lambda.h"
44#include "clang/Basic/LangOptions.h"
45#include "clang/Basic/OpenMPKinds.h"
46#include "clang/Basic/OperatorKinds.h"
47#include "clang/Basic/SourceLocation.h"
48#include "clang/Basic/Specifiers.h"
49#include "clang/Basic/TypeTraits.h"
50#include "clang/Lex/Token.h"
51#include "clang/Serialization/ASTBitCodes.h"
52#include "clang/Serialization/ASTRecordReader.h"
53#include "llvm/ADT/BitmaskEnum.h"
54#include "llvm/ADT/DenseMap.h"
55#include "llvm/ADT/SmallString.h"
56#include "llvm/ADT/SmallVector.h"
57#include "llvm/ADT/StringRef.h"
58#include "llvm/Bitstream/BitstreamReader.h"
59#include "llvm/Support/Casting.h"
60#include "llvm/Support/ErrorHandling.h"
61#include <algorithm>
62#include <cassert>
63#include <cstdint>
64#include <string>

66using namespace clang;
67using namespace serialization;

69namespace clang {

class ASTStmtReader : public StmtVisitor<ASTStmtReader> {
  ASTRecordReader &Record;
  llvm::BitstreamCursor &DeclsCursor;

  SourceLocation readSourceLocation() {
    return Record.readSourceLocation();
  }

  SourceRange readSourceRange() {
    return Record.readSourceRange();
  }

  std::string readString() {
    return Record.readString();
  }

  TypeSourceInfo *readTypeSourceInfo() {
    return Record.readTypeSourceInfo();
  }

  Decl *readDecl() {
    return Record.readDecl();
  }

  template<typename T>
  T *readDeclAs() {
    return Record.readDeclAs<T>();
  }

public:
  ASTStmtReader(ASTRecordReader &Record, llvm::BitstreamCursor &Cursor)
      : Record(Record), DeclsCursor(Cursor) {}

  /// The number of record fields required for the Stmt class
  /// itself.
  static const unsigned NumStmtFields = 0;

  /// The number of record fields required for the Expr class
  /// itself.
  static const unsigned NumExprFields =
      NumStmtFields + llvm::BitWidth<ExprDependence> + 3;

  /// Read and initialize a ExplicitTemplateArgumentList structure.
  void ReadTemplateKWAndArgsInfo(ASTTemplateKWAndArgsInfo &Args,
                                 TemplateArgumentLoc *ArgsLocArray,
                                 unsigned NumTemplateArgs);

  /// Read and initialize a ExplicitTemplateArgumentList structure.
  void ReadExplicitTemplateArgumentList(ASTTemplateArgumentListInfo &ArgList,
                                        unsigned NumTemplateArgs);

  void VisitStmt(Stmt *S);
123#define STMT(Type, Base) \
  void Visit##Type(Type *);
125#include "clang/AST/StmtNodes.inc"
};

128} // namespace clang

130void ASTStmtReader::ReadTemplateKWAndArgsInfo(ASTTemplateKWAndArgsInfo &Args,
                                            TemplateArgumentLoc *ArgsLocArray,
                                            unsigned NumTemplateArgs) {
SourceLocation TemplateKWLoc = readSourceLocation();
TemplateArgumentListInfo ArgInfo;
ArgInfo.setLAngleLoc(readSourceLocation());
ArgInfo.setRAngleLoc(readSourceLocation());
for (unsigned i = 0; i != NumTemplateArgs; ++i)
  ArgInfo.addArgument(Record.readTemplateArgumentLoc());
Args.initializeFrom(TemplateKWLoc, ArgInfo, ArgsLocArray);
140}

142void ASTStmtReader::VisitStmt(Stmt *S) {
assert(Record.getIdx() == NumStmtFields && "Incorrect statement field count")((void)0);
144}

146void ASTStmtReader::VisitNullStmt(NullStmt *S) {
VisitStmt(S);
S->setSemiLoc(readSourceLocation());
S->NullStmtBits.HasLeadingEmptyMacro = Record.readInt();
150}

152void ASTStmtReader::VisitCompoundStmt(CompoundStmt *S) {
VisitStmt(S);
SmallVector<Stmt *, 16> Stmts;
unsigned NumStmts = Record.readInt();
while (NumStmts--)
  Stmts.push_back(Record.readSubStmt());
S->setStmts(Stmts);
S->CompoundStmtBits.LBraceLoc = readSourceLocation();
S->RBraceLoc = readSourceLocation();
161}

163void ASTStmtReader::VisitSwitchCase(SwitchCase *S) {
VisitStmt(S);
Record.recordSwitchCaseID(S, Record.readInt());
S->setKeywordLoc(readSourceLocation());
S->setColonLoc(readSourceLocation());
168}

170void ASTStmtReader::VisitCaseStmt(CaseStmt *S) {
VisitSwitchCase(S);
bool CaseStmtIsGNURange = Record.readInt();
S->setLHS(Record.readSubExpr());
S->setSubStmt(Record.readSubStmt());
if (CaseStmtIsGNURange) {
  S->setRHS(Record.readSubExpr());
  S->setEllipsisLoc(readSourceLocation());
}
179}

181void ASTStmtReader::VisitDefaultStmt(DefaultStmt *S) {
VisitSwitchCase(S);
S->setSubStmt(Record.readSubStmt());
184}

186void ASTStmtReader::VisitLabelStmt(LabelStmt *S) {
VisitStmt(S);
bool IsSideEntry = Record.readInt();
auto *LD = readDeclAs<LabelDecl>();
LD->setStmt(S);
S->setDecl(LD);
S->setSubStmt(Record.readSubStmt());
S->setIdentLoc(readSourceLocation());
S->setSideEntry(IsSideEntry);
195}

197void ASTStmtReader::VisitAttributedStmt(AttributedStmt *S) {
VisitStmt(S);
// NumAttrs in AttributedStmt is set when creating an empty
// AttributedStmt in AttributedStmt::CreateEmpty, since it is needed
// to allocate the right amount of space for the trailing Attr *.
uint64_t NumAttrs = Record.readInt();
AttrVec Attrs;
Record.readAttributes(Attrs);
(void)NumAttrs;
assert(NumAttrs == S->AttributedStmtBits.NumAttrs)((void)0);
assert(NumAttrs == Attrs.size())((void)0);
std::copy(Attrs.begin(), Attrs.end(), S->getAttrArrayPtr());
S->SubStmt = Record.readSubStmt();
S->AttributedStmtBits.AttrLoc = readSourceLocation();
211}

213void ASTStmtReader::VisitIfStmt(IfStmt *S) {
VisitStmt(S);

S->setConstexpr(Record.readInt());
bool HasElse = Record.readInt();
bool HasVar = Record.readInt();
bool HasInit = Record.readInt();

S->setCond(Record.readSubExpr());
S->setThen(Record.readSubStmt());
if (HasElse)
  S->setElse(Record.readSubStmt());
if (HasVar)
  S->setConditionVariable(Record.getContext(), readDeclAs<VarDecl>());
if (HasInit)
  S->setInit(Record.readSubStmt());

S->setIfLoc(readSourceLocation());
S->setLParenLoc(readSourceLocation());
S->setRParenLoc(readSourceLocation());
if (HasElse)
  S->setElseLoc(readSourceLocation());
235}

237void ASTStmtReader::VisitSwitchStmt(SwitchStmt *S) {
VisitStmt(S);

bool HasInit = Record.readInt();
bool HasVar = Record.readInt();
bool AllEnumCasesCovered = Record.readInt();
if (AllEnumCasesCovered)
  S->setAllEnumCasesCovered();

S->setCond(Record.readSubExpr());
S->setBody(Record.readSubStmt());
if (HasInit)
  S->setInit(Record.readSubStmt());
if (HasVar)
  S->setConditionVariable(Record.getContext(), readDeclAs<VarDecl>());

S->setSwitchLoc(readSourceLocation());
S->setLParenLoc(readSourceLocation());
S->setRParenLoc(readSourceLocation());

SwitchCase *PrevSC = nullptr;
for (auto E = Record.size(); Record.getIdx() != E; ) {
  SwitchCase *SC = Record.getSwitchCaseWithID(Record.readInt());
  if (PrevSC)
    PrevSC->setNextSwitchCase(SC);
  else
    S->setSwitchCaseList(SC);

  PrevSC = SC;
}
267}

269void ASTStmtReader::VisitWhileStmt(WhileStmt *S) {
VisitStmt(S);

bool HasVar = Record.readInt();

S->setCond(Record.readSubExpr());
S->setBody(Record.readSubStmt());
if (HasVar)
  S->setConditionVariable(Record.getContext(), readDeclAs<VarDecl>());

S->setWhileLoc(readSourceLocation());
S->setLParenLoc(readSourceLocation());
S->setRParenLoc(readSourceLocation());
282}

284void ASTStmtReader::VisitDoStmt(DoStmt *S) {
VisitStmt(S);
S->setCond(Record.readSubExpr());
S->setBody(Record.readSubStmt());
S->setDoLoc(readSourceLocation());
S->setWhileLoc(readSourceLocation());
S->setRParenLoc(readSourceLocation());
291}

293void ASTStmtReader::VisitForStmt(ForStmt *S) {
VisitStmt(S);
S->setInit(Record.readSubStmt());
S->setCond(Record.readSubExpr());
S->setConditionVariable(Record.getContext(), readDeclAs<VarDecl>());
S->setInc(Record.readSubExpr());
S->setBody(Record.readSubStmt());
S->setForLoc(readSourceLocation());
S->setLParenLoc(readSourceLocation());
S->setRParenLoc(readSourceLocation());
303}

305void ASTStmtReader::VisitGotoStmt(GotoStmt *S) {
VisitStmt(S);
S->setLabel(readDeclAs<LabelDecl>());
S->setGotoLoc(readSourceLocation());
S->setLabelLoc(readSourceLocation());
310}

312void ASTStmtReader::VisitIndirectGotoStmt(IndirectGotoStmt *S) {
VisitStmt(S);
S->setGotoLoc(readSourceLocation());
S->setStarLoc(readSourceLocation());
S->setTarget(Record.readSubExpr());
317}

319void ASTStmtReader::VisitContinueStmt(ContinueStmt *S) {
VisitStmt(S);
S->setContinueLoc(readSourceLocation());
322}

324void ASTStmtReader::VisitBreakStmt(BreakStmt *S) {
VisitStmt(S);
S->setBreakLoc(readSourceLocation());
327}

329void ASTStmtReader::VisitReturnStmt(ReturnStmt *S) {
VisitStmt(S);

bool HasNRVOCandidate = Record.readInt();

S->setRetValue(Record.readSubExpr());
if (HasNRVOCandidate)
  S->setNRVOCandidate(readDeclAs<VarDecl>());

S->setReturnLoc(readSourceLocation());
339}

341void ASTStmtReader::VisitDeclStmt(DeclStmt *S) {
VisitStmt(S);
S->setStartLoc(readSourceLocation());
S->setEndLoc(readSourceLocation());

if (Record.size() - Record.getIdx() == 1) {
  // Single declaration
  S->setDeclGroup(DeclGroupRef(readDecl()));
} else {
  SmallVector<Decl *, 16> Decls;
  int N = Record.size() - Record.getIdx();
  Decls.reserve(N);
  for (int I = 0; I < N; ++I)
    Decls.push_back(readDecl());
  S->setDeclGroup(DeclGroupRef(DeclGroup::Create(Record.getContext(),
                                                 Decls.data(),
                                                 Decls.size())));
}
359}

361void ASTStmtReader::VisitAsmStmt(AsmStmt *S) {
VisitStmt(S);
S->NumOutputs = Record.readInt();
S->NumInputs = Record.readInt();
S->NumClobbers = Record.readInt();
S->setAsmLoc(readSourceLocation());
S->setVolatile(Record.readInt());
S->setSimple(Record.readInt());
369}

371void ASTStmtReader::VisitGCCAsmStmt(GCCAsmStmt *S) {
VisitAsmStmt(S);
S->NumLabels = Record.readInt();
S->setRParenLoc(readSourceLocation());
S->setAsmString(cast_or_null<StringLiteral>(Record.readSubStmt()));

unsigned NumOutputs = S->getNumOutputs();
unsigned NumInputs = S->getNumInputs();
unsigned NumClobbers = S->getNumClobbers();
unsigned NumLabels = S->getNumLabels();

// Outputs and inputs
SmallVector<IdentifierInfo *, 16> Names;
SmallVector<StringLiteral*, 16> Constraints;
SmallVector<Stmt*, 16> Exprs;
for (unsigned I = 0, N = NumOutputs + NumInputs; I != N; ++I) {
  Names.push_back(Record.readIdentifier());
  Constraints.push_back(cast_or_null<StringLiteral>(Record.readSubStmt()));
  Exprs.push_back(Record.readSubStmt());
}

// Constraints
SmallVector<StringLiteral*, 16> Clobbers;
for (unsigned I = 0; I != NumClobbers; ++I)
  Clobbers.push_back(cast_or_null<StringLiteral>(Record.readSubStmt()));

// Labels
for (unsigned I = 0, N = NumLabels; I != N; ++I)
  Exprs.push_back(Record.readSubStmt());

S->setOutputsAndInputsAndClobbers(Record.getContext(),
                                  Names.data(), Constraints.data(),
                                  Exprs.data(), NumOutputs, NumInputs,
                                  NumLabels,
                                  Clobbers.data(), NumClobbers);
406}

408void ASTStmtReader::VisitMSAsmStmt(MSAsmStmt *S) {
VisitAsmStmt(S);
S->LBraceLoc = readSourceLocation();
S->EndLoc = readSourceLocation();
S->NumAsmToks = Record.readInt();
std::string AsmStr = readString();

// Read the tokens.
SmallVector<Token, 16> AsmToks;
AsmToks.reserve(S->NumAsmToks);
for (unsigned i = 0, e = S->NumAsmToks; i != e; ++i) {
  AsmToks.push_back(Record.readToken());
}

// The calls to reserve() for the FooData vectors are mandatory to
// prevent dead StringRefs in the Foo vectors.

// Read the clobbers.
SmallVector<std::string, 16> ClobbersData;
SmallVector<StringRef, 16> Clobbers;
ClobbersData.reserve(S->NumClobbers);
Clobbers.reserve(S->NumClobbers);
for (unsigned i = 0, e = S->NumClobbers; i != e; ++i) {
  ClobbersData.push_back(readString());
  Clobbers.push_back(ClobbersData.back());
}

// Read the operands.
unsigned NumOperands = S->NumOutputs + S->NumInputs;
SmallVector<Expr*, 16> Exprs;
SmallVector<std::string, 16> ConstraintsData;
SmallVector<StringRef, 16> Constraints;
Exprs.reserve(NumOperands);
ConstraintsData.reserve(NumOperands);
Constraints.reserve(NumOperands);
for (unsigned i = 0; i != NumOperands; ++i) {
  Exprs.push_back(cast<Expr>(Record.readSubStmt()));
  ConstraintsData.push_back(readString());
  Constraints.push_back(ConstraintsData.back());
}

S->initialize(Record.getContext(), AsmStr, AsmToks,
              Constraints, Exprs, Clobbers);
451}

453void ASTStmtReader::VisitCoroutineBodyStmt(CoroutineBodyStmt *S) {
VisitStmt(S);
assert(Record.peekInt() == S->NumParams)((void)0);
Record.skipInts(1);
auto *StoredStmts = S->getStoredStmts();
for (unsigned i = 0;
     i < CoroutineBodyStmt::SubStmt::FirstParamMove + S->NumParams; ++i)
  StoredStmts[i] = Record.readSubStmt();
461}

463void ASTStmtReader::VisitCoreturnStmt(CoreturnStmt *S) {
VisitStmt(S);
S->CoreturnLoc = Record.readSourceLocation();
for (auto &SubStmt: S->SubStmts)
  SubStmt = Record.readSubStmt();
S->IsImplicit = Record.readInt() != 0;
469}

471void ASTStmtReader::VisitCoawaitExpr(CoawaitExpr *E) {
VisitExpr(E);
E->KeywordLoc = readSourceLocation();
for (auto &SubExpr: E->SubExprs)
  SubExpr = Record.readSubStmt();
E->OpaqueValue = cast_or_null<OpaqueValueExpr>(Record.readSubStmt());
E->setIsImplicit(Record.readInt() != 0);
478}

480void ASTStmtReader::VisitCoyieldExpr(CoyieldExpr *E) {
VisitExpr(E);
E->KeywordLoc = readSourceLocation();
for (auto &SubExpr: E->SubExprs)
  SubExpr = Record.readSubStmt();
E->OpaqueValue = cast_or_null<OpaqueValueExpr>(Record.readSubStmt());
486}

488void ASTStmtReader::VisitDependentCoawaitExpr(DependentCoawaitExpr *E) {
VisitExpr(E);
E->KeywordLoc = readSourceLocation();
for (auto &SubExpr: E->SubExprs)
  SubExpr = Record.readSubStmt();
493}

495void ASTStmtReader::VisitCapturedStmt(CapturedStmt *S) {
VisitStmt(S);
Record.skipInts(1);
S->setCapturedDecl(readDeclAs<CapturedDecl>());
S->setCapturedRegionKind(static_cast<CapturedRegionKind>(Record.readInt()));
S->setCapturedRecordDecl(readDeclAs<RecordDecl>());

// Capture inits
for (CapturedStmt::capture_init_iterator I = S->capture_init_begin(),
                                         E = S->capture_init_end();
     I != E; ++I)
  *I = Record.readSubExpr();

// Body
S->setCapturedStmt(Record.readSubStmt());
S->getCapturedDecl()->setBody(S->getCapturedStmt());

// Captures
for (auto &I : S->captures()) {
  I.VarAndKind.setPointer(readDeclAs<VarDecl>());
  I.VarAndKind.setInt(
      static_cast<CapturedStmt::VariableCaptureKind>(Record.readInt()));
  I.Loc = readSourceLocation();
}
519}

521void ASTStmtReader::VisitExpr(Expr *E) {
VisitStmt(E);
E->setType(Record.readType());

// FIXME: write and read all DependentFlags with a single call.
bool TypeDependent = Record.readInt();
bool ValueDependent = Record.readInt();
bool InstantiationDependent = Record.readInt();
bool ContainsUnexpandedTemplateParameters = Record.readInt();
bool ContainsErrors = Record.readInt();
auto Deps = ExprDependence::None;
if (TypeDependent)
  Deps |= ExprDependence::Type;
if (ValueDependent)
  Deps |= ExprDependence::Value;
if (InstantiationDependent)
  Deps |= ExprDependence::Instantiation;
if (ContainsUnexpandedTemplateParameters)
  Deps |= ExprDependence::UnexpandedPack;
if (ContainsErrors)
  Deps |= ExprDependence::Error;
E->setDependence(Deps);

E->setValueKind(static_cast<ExprValueKind>(Record.readInt()));
E->setObjectKind(static_cast<ExprObjectKind>(Record.readInt()));
assert(Record.getIdx() == NumExprFields &&((void)0)
       "Incorrect expression field count")((void)0);
548}

550void ASTStmtReader::VisitConstantExpr(ConstantExpr *E) {
VisitExpr(E);

auto StorageKind = Record.readInt();
assert(E->ConstantExprBits.ResultKind == StorageKind && "Wrong ResultKind!")((void)0);

E->ConstantExprBits.APValueKind = Record.readInt();
E->ConstantExprBits.IsUnsigned = Record.readInt();
E->ConstantExprBits.BitWidth = Record.readInt();
E->ConstantExprBits.HasCleanup = false; // Not serialized, see below.
E->ConstantExprBits.IsImmediateInvocation = Record.readInt();

switch (StorageKind) {
case ConstantExpr::RSK_None:
  break;

case ConstantExpr::RSK_Int64:
  E->Int64Result() = Record.readInt();
  break;

case ConstantExpr::RSK_APValue:
  E->APValueResult() = Record.readAPValue();
  if (E->APValueResult().needsCleanup()) {
    E->ConstantExprBits.HasCleanup = true;
    Record.getContext().addDestruction(&E->APValueResult());
  }
  break;
default:
  llvm_unreachable("unexpected ResultKind!")__builtin_unreachable();
}

E->setSubExpr(Record.readSubExpr());
582}

584void ASTStmtReader::VisitSYCLUniqueStableNameExpr(SYCLUniqueStableNameExpr *E) {
VisitExpr(E);

E->setLocation(readSourceLocation());
E->setLParenLocation(readSourceLocation());
E->setRParenLocation(readSourceLocation());

E->setTypeSourceInfo(Record.readTypeSourceInfo());
592}

594void ASTStmtReader::VisitPredefinedExpr(PredefinedExpr *E) {
VisitExpr(E);
bool HasFunctionName = Record.readInt();
E->PredefinedExprBits.HasFunctionName = HasFunctionName;
E->PredefinedExprBits.Kind = Record.readInt();
E->setLocation(readSourceLocation());
if (HasFunctionName)
  E->setFunctionName(cast<StringLiteral>(Record.readSubExpr()));
602}

604void ASTStmtReader::VisitDeclRefExpr(DeclRefExpr *E) {
VisitExpr(E);

E->DeclRefExprBits.HasQualifier = Record.readInt();
E->DeclRefExprBits.HasFoundDecl = Record.readInt();
E->DeclRefExprBits.HasTemplateKWAndArgsInfo = Record.readInt();
E->DeclRefExprBits.HadMultipleCandidates = Record.readInt();
E->DeclRefExprBits.RefersToEnclosingVariableOrCapture = Record.readInt();
E->DeclRefExprBits.NonOdrUseReason = Record.readInt();
unsigned NumTemplateArgs = 0;
if (E->hasTemplateKWAndArgsInfo())
  NumTemplateArgs = Record.readInt();

if (E->hasQualifier())
  new (E->getTrailingObjects<NestedNameSpecifierLoc>())
      NestedNameSpecifierLoc(Record.readNestedNameSpecifierLoc());

if (E->hasFoundDecl())
  *E->getTrailingObjects<NamedDecl *>() = readDeclAs<NamedDecl>();

if (E->hasTemplateKWAndArgsInfo())
  ReadTemplateKWAndArgsInfo(
      *E->getTrailingObjects<ASTTemplateKWAndArgsInfo>(),
      E->getTrailingObjects<TemplateArgumentLoc>(), NumTemplateArgs);

E->D = readDeclAs<ValueDecl>();
E->setLocation(readSourceLocation());
E->DNLoc = Record.readDeclarationNameLoc(E->getDecl()->getDeclName());
632}

634void ASTStmtReader::VisitIntegerLiteral(IntegerLiteral *E) {
VisitExpr(E);
E->setLocation(readSourceLocation());
E->setValue(Record.getContext(), Record.readAPInt());
638}

640void ASTStmtReader::VisitFixedPointLiteral(FixedPointLiteral *E) {
VisitExpr(E);
E->setLocation(readSourceLocation());
E->setScale(Record.readInt());
E->setValue(Record.getContext(), Record.readAPInt());
645}

647void ASTStmtReader::VisitFloatingLiteral(FloatingLiteral *E) {
VisitExpr(E);
E->setRawSemantics(
    static_cast<llvm::APFloatBase::Semantics>(Record.readInt()));
E->setExact(Record.readInt());
E->setValue(Record.getContext(), Record.readAPFloat(E->getSemantics()));
E->setLocation(readSourceLocation());
654}

656void ASTStmtReader::VisitImaginaryLiteral(ImaginaryLiteral *E) {
VisitExpr(E);
E->setSubExpr(Record.readSubExpr());
659}

661void ASTStmtReader::VisitStringLiteral(StringLiteral *E) {
VisitExpr(E);

// NumConcatenated, Length and CharByteWidth are set by the empty
// ctor since they are needed to allocate storage for the trailing objects.
unsigned NumConcatenated = Record.readInt();
unsigned Length = Record.readInt();
unsigned CharByteWidth = Record.readInt();
assert((NumConcatenated == E->getNumConcatenated()) &&((void)0)
       "Wrong number of concatenated tokens!")((void)0);
assert((Length == E->getLength()) && "Wrong Length!")((void)0);
assert((CharByteWidth == E->getCharByteWidth()) && "Wrong character width!")((void)0);
E->StringLiteralBits.Kind = Record.readInt();
E->StringLiteralBits.IsPascal = Record.readInt();

// The character width is originally computed via mapCharByteWidth.
// Check that the deserialized character width is consistant with the result
// of calling mapCharByteWidth.
assert((CharByteWidth ==((void)0)
        StringLiteral::mapCharByteWidth(Record.getContext().getTargetInfo(),((void)0)
                                        E->getKind())) &&((void)0)
       "Wrong character width!")((void)0);

// Deserialize the trailing array of SourceLocation.
for (unsigned I = 0; I < NumConcatenated; ++I)
  E->setStrTokenLoc(I, readSourceLocation());

// Deserialize the trailing array of char holding the string data.
char *StrData = E->getStrDataAsChar();
for (unsigned I = 0; I < Length * CharByteWidth; ++I)
  StrData[I] = Record.readInt();
692}

694void ASTStmtReader::VisitCharacterLiteral(CharacterLiteral *E) {
VisitExpr(E);
E->setValue(Record.readInt());
E->setLocation(readSourceLocation());
E->setKind(static_cast<CharacterLiteral::CharacterKind>(Record.readInt()));
699}

701void ASTStmtReader::VisitParenExpr(ParenExpr *E) {
VisitExpr(E);
E->setLParen(readSourceLocation());
E->setRParen(readSourceLocation());
E->setSubExpr(Record.readSubExpr());
706}

708void ASTStmtReader::VisitParenListExpr(ParenListExpr *E) {
VisitExpr(E);
unsigned NumExprs = Record.readInt();
assert((NumExprs == E->getNumExprs()) && "Wrong NumExprs!")((void)0);
for (unsigned I = 0; I != NumExprs; ++I)
  E->getTrailingObjects<Stmt *>()[I] = Record.readSubStmt();
E->LParenLoc = readSourceLocation();
E->RParenLoc = readSourceLocation();
716}

718void ASTStmtReader::VisitUnaryOperator(UnaryOperator *E) {
VisitExpr(E);
bool hasFP_Features = Record.readInt();
assert(hasFP_Features == E->hasStoredFPFeatures())((void)0);
E->setSubExpr(Record.readSubExpr());
E->setOpcode((UnaryOperator::Opcode)Record.readInt());
E->setOperatorLoc(readSourceLocation());
E->setCanOverflow(Record.readInt());
if (hasFP_Features)
  E->setStoredFPFeatures(
      FPOptionsOverride::getFromOpaqueInt(Record.readInt()));
729}

731void ASTStmtReader::VisitOffsetOfExpr(OffsetOfExpr *E) {
VisitExpr(E);
assert(E->getNumComponents() == Record.peekInt())((void)0);
Record.skipInts(1);
assert(E->getNumExpressions() == Record.peekInt())((void)0);
Record.skipInts(1);
E->setOperatorLoc(readSourceLocation());
E->setRParenLoc(readSourceLocation());
E->setTypeSourceInfo(readTypeSourceInfo());
for (unsigned I = 0, N = E->getNumComponents(); I != N; ++I) {
  auto Kind = static_cast<OffsetOfNode::Kind>(Record.readInt());
  SourceLocation Start = readSourceLocation();
  SourceLocation End = readSourceLocation();
  switch (Kind) {
  case OffsetOfNode::Array:
    E->setComponent(I, OffsetOfNode(Start, Record.readInt(), End));
    break;

  case OffsetOfNode::Field:
    E->setComponent(
        I, OffsetOfNode(Start, readDeclAs<FieldDecl>(), End));
    break;

  case OffsetOfNode::Identifier:
    E->setComponent(
        I,
        OffsetOfNode(Start, Record.readIdentifier(), End));
    break;

  case OffsetOfNode::Base: {
    auto *Base = new (Record.getContext()) CXXBaseSpecifier();
    *Base = Record.readCXXBaseSpecifier();
    E->setComponent(I, OffsetOfNode(Base));
    break;
  }
  }
}

for (unsigned I = 0, N = E->getNumExpressions(); I != N; ++I)
  E->setIndexExpr(I, Record.readSubExpr());
771}

773void ASTStmtReader::VisitUnaryExprOrTypeTraitExpr(UnaryExprOrTypeTraitExpr *E) {
VisitExpr(E);
E->setKind(static_cast<UnaryExprOrTypeTrait>(Record.readInt()));
if (Record.peekInt() == 0) {
  E->setArgument(Record.readSubExpr());
  Record.skipInts(1);
} else {
  E->setArgument(readTypeSourceInfo());
}
E->setOperatorLoc(readSourceLocation());
E->setRParenLoc(readSourceLocation());
784}

786static ConstraintSatisfaction
787readConstraintSatisfaction(ASTRecordReader &Record) {
ConstraintSatisfaction Satisfaction;
Satisfaction.IsSatisfied = Record.readInt();
if (!Satisfaction.IsSatisfied) {
  unsigned NumDetailRecords = Record.readInt();
  for (unsigned i = 0; i != NumDetailRecords; ++i) {
    Expr *ConstraintExpr = Record.readExpr();
    if (/* IsDiagnostic */Record.readInt()) {
      SourceLocation DiagLocation = Record.readSourceLocation();
      std::string DiagMessage = Record.readString();
      Satisfaction.Details.emplace_back(
          ConstraintExpr, new (Record.getContext())
                              ConstraintSatisfaction::SubstitutionDiagnostic{
                                  DiagLocation, DiagMessage});
    } else
      Satisfaction.Details.emplace_back(ConstraintExpr, Record.readExpr());
  }
}
return Satisfaction;
806}

808void ASTStmtReader::VisitConceptSpecializationExpr(
      ConceptSpecializationExpr *E) {
VisitExpr(E);
unsigned NumTemplateArgs = Record.readInt();
E->NestedNameSpec = Record.readNestedNameSpecifierLoc();
E->TemplateKWLoc = Record.readSourceLocation();
E->ConceptName = Record.readDeclarationNameInfo();
E->NamedConcept = readDeclAs<ConceptDecl>();
E->FoundDecl = Record.readDeclAs<NamedDecl>();
E->ArgsAsWritten = Record.readASTTemplateArgumentListInfo();
llvm::SmallVector<TemplateArgument, 4> Args;
for (unsigned I = 0; I < NumTemplateArgs; ++I)
  Args.push_back(Record.readTemplateArgument());
E->setTemplateArguments(Args);
E->Satisfaction = E->isValueDependent() ? nullptr :
    ASTConstraintSatisfaction::Create(Record.getContext(),
                                      readConstraintSatisfaction(Record));
825}

827static concepts::Requirement::SubstitutionDiagnostic *
828readSubstitutionDiagnostic(ASTRecordReader &Record) {
std::string SubstitutedEntity = Record.readString();
SourceLocation DiagLoc = Record.readSourceLocation();
std::string DiagMessage = Record.readString();
return new (Record.getContext())
    concepts::Requirement::SubstitutionDiagnostic{SubstitutedEntity, DiagLoc,
                                                  DiagMessage};
835}

837void ASTStmtReader::VisitRequiresExpr(RequiresExpr *E) {
VisitExpr(E);
unsigned NumLocalParameters = Record.readInt();
unsigned NumRequirements = Record.readInt();
E->RequiresExprBits.RequiresKWLoc = Record.readSourceLocation();
E->RequiresExprBits.IsSatisfied = Record.readInt();
E->Body = Record.readDeclAs<RequiresExprBodyDecl>();
llvm::SmallVector<ParmVarDecl *, 4> LocalParameters;
for (unsigned i = 0; i < NumLocalParameters; ++i)
  LocalParameters.push_back(cast<ParmVarDecl>(Record.readDecl()));
std::copy(LocalParameters.begin(), LocalParameters.end(),
          E->getTrailingObjects<ParmVarDecl *>());
llvm::SmallVector<concepts::Requirement *, 4> Requirements;
for (unsigned i = 0; i < NumRequirements; ++i) {
  auto RK =
      static_cast<concepts::Requirement::RequirementKind>(Record.readInt());
  concepts::Requirement *R = nullptr;
  switch (RK) {
    case concepts::Requirement::RK_Type: {
      auto Status =
          static_cast<concepts::TypeRequirement::SatisfactionStatus>(
              Record.readInt());
      if (Status == concepts::TypeRequirement::SS_SubstitutionFailure)
        R = new (Record.getContext())
            concepts::TypeRequirement(readSubstitutionDiagnostic(Record));
      else
        R = new (Record.getContext())
            concepts::TypeRequirement(Record.readTypeSourceInfo());
    } break;
    case concepts::Requirement::RK_Simple:
    case concepts::Requirement::RK_Compound: {
      auto Status =
          static_cast<concepts::ExprRequirement::SatisfactionStatus>(
              Record.readInt());
      llvm::PointerUnion<concepts::Requirement::SubstitutionDiagnostic *,
                         Expr *> E;
      if (Status == concepts::ExprRequirement::SS_ExprSubstitutionFailure) {
        E = readSubstitutionDiagnostic(Record);
      } else
        E = Record.readExpr();

      llvm::Optional<concepts::ExprRequirement::ReturnTypeRequirement> Req;
      ConceptSpecializationExpr *SubstitutedConstraintExpr = nullptr;
      SourceLocation NoexceptLoc;
      if (RK == concepts::Requirement::RK_Simple) {
        Req.emplace();
      } else {
        NoexceptLoc = Record.readSourceLocation();
        switch (/* returnTypeRequirementKind */Record.readInt()) {
          case 0:
            // No return type requirement.
            Req.emplace();
            break;
          case 1: {
            // type-constraint
            TemplateParameterList *TPL = Record.readTemplateParameterList();
            if (Status >=
                concepts::ExprRequirement::SS_ConstraintsNotSatisfied)
              SubstitutedConstraintExpr =
                  cast<ConceptSpecializationExpr>(Record.readExpr());
            Req.emplace(TPL);
          } break;
          case 2:
            // Substitution failure
            Req.emplace(readSubstitutionDiagnostic(Record));
            break;
        }
      }
      if (Expr *Ex = E.dyn_cast<Expr *>())
        R = new (Record.getContext()) concepts::ExprRequirement(
                Ex, RK == concepts::Requirement::RK_Simple, NoexceptLoc,
                std::move(*Req), Status, SubstitutedConstraintExpr);
      else
        R = new (Record.getContext()) concepts::ExprRequirement(
                E.get<concepts::Requirement::SubstitutionDiagnostic *>(),
                RK == concepts::Requirement::RK_Simple, NoexceptLoc,
                std::move(*Req));
    } break;
    case concepts::Requirement::RK_Nested: {
      if (/* IsSubstitutionDiagnostic */Record.readInt()) {
        R = new (Record.getContext()) concepts::NestedRequirement(
            readSubstitutionDiagnostic(Record));
        break;
      }
      Expr *E = Record.readExpr();
      if (E->isInstantiationDependent())
        R = new (Record.getContext()) concepts::NestedRequirement(E);
      else
        R = new (Record.getContext())
            concepts::NestedRequirement(Record.getContext(), E,
                                        readConstraintSatisfaction(Record));
    } break;
  }
  if (!R)
    continue;
  Requirements.push_back(R);
}
std::copy(Requirements.begin(), Requirements.end(),
          E->getTrailingObjects<concepts::Requirement *>());
E->RBraceLoc = Record.readSourceLocation();
937}

939void ASTStmtReader::VisitArraySubscriptExpr(ArraySubscriptExpr *E) {
VisitExpr(E);
E->setLHS(Record.readSubExpr());
E->setRHS(Record.readSubExpr());
E->setRBracketLoc(readSourceLocation());
944}

946void ASTStmtReader::VisitMatrixSubscriptExpr(MatrixSubscriptExpr *E) {
VisitExpr(E);
E->setBase(Record.readSubExpr());
E->setRowIdx(Record.readSubExpr());
E->setColumnIdx(Record.readSubExpr());
E->setRBracketLoc(readSourceLocation());
952}

954void ASTStmtReader::VisitOMPArraySectionExpr(OMPArraySectionExpr *E) {
VisitExpr(E);
E->setBase(Record.readSubExpr());
E->setLowerBound(Record.readSubExpr());
E->setLength(Record.readSubExpr());
E->setStride(Record.readSubExpr());
E->setColonLocFirst(readSourceLocation());
E->setColonLocSecond(readSourceLocation());
E->setRBracketLoc(readSourceLocation());
963}

965void ASTStmtReader::VisitOMPArrayShapingExpr(OMPArrayShapingExpr *E) {
VisitExpr(E);
unsigned NumDims = Record.readInt();
E->setBase(Record.readSubExpr());
SmallVector<Expr *, 4> Dims(NumDims);
for (unsigned I = 0; I < NumDims; ++I)
  Dims[I] = Record.readSubExpr();
E->setDimensions(Dims);
SmallVector<SourceRange, 4> SRs(NumDims);
for (unsigned I = 0; I < NumDims; ++I)
  SRs[I] = readSourceRange();
E->setBracketsRanges(SRs);
E->setLParenLoc(readSourceLocation());
E->setRParenLoc(readSourceLocation());
979}

981void ASTStmtReader::VisitOMPIteratorExpr(OMPIteratorExpr *E) {
VisitExpr(E);
unsigned NumIters = Record.readInt();
E->setIteratorKwLoc(readSourceLocation());
E->setLParenLoc(readSourceLocation());
E->setRParenLoc(readSourceLocation());
for (unsigned I = 0; I < NumIters; ++I) {
  E->setIteratorDeclaration(I, Record.readDeclRef());
  E->setAssignmentLoc(I, readSourceLocation());
  Expr *Begin = Record.readSubExpr();
  Expr *End = Record.readSubExpr();
  Expr *Step = Record.readSubExpr();
  SourceLocation ColonLoc = readSourceLocation();
  SourceLocation SecColonLoc;
  if (Step)
    SecColonLoc = readSourceLocation();
  E->setIteratorRange(I, Begin, ColonLoc, End, SecColonLoc, Step);
  // Deserialize helpers
  OMPIteratorHelperData HD;
  HD.CounterVD = cast_or_null<VarDecl>(Record.readDeclRef());
  HD.Upper = Record.readSubExpr();
  HD.Update = Record.readSubExpr();
  HD.CounterUpdate = Record.readSubExpr();
  E->setHelper(I, HD);
}
1006}

1008void ASTStmtReader::VisitCallExpr(CallExpr *E) {
VisitExpr(E);
unsigned NumArgs = Record.readInt();
bool HasFPFeatures = Record.readInt();
assert((NumArgs == E->getNumArgs()) && "Wrong NumArgs!")((void)0);
E->setRParenLoc(readSourceLocation());
E->setCallee(Record.readSubExpr());
for (unsigned I = 0; I != NumArgs; ++I)
  E->setArg(I, Record.readSubExpr());
E->setADLCallKind(static_cast<CallExpr::ADLCallKind>(Record.readInt()));
if (HasFPFeatures)
  E->setStoredFPFeatures(
      FPOptionsOverride::getFromOpaqueInt(Record.readInt()));
1021}

1023void ASTStmtReader::VisitCXXMemberCallExpr(CXXMemberCallExpr *E) {
VisitCallExpr(E);
1025}

1027void ASTStmtReader::VisitMemberExpr(MemberExpr *E) {
VisitExpr(E);

bool HasQualifier = Record.readInt();
bool HasFoundDecl = Record.readInt();
bool HasTemplateInfo = Record.readInt();
unsigned NumTemplateArgs = Record.readInt();

E->Base = Record.readSubExpr();
E->MemberDecl = Record.readDeclAs<ValueDecl>();
E->MemberDNLoc = Record.readDeclarationNameLoc(E->MemberDecl->getDeclName());
E->MemberLoc = Record.readSourceLocation();
E->MemberExprBits.IsArrow = Record.readInt();
E->MemberExprBits.HasQualifierOrFoundDecl = HasQualifier || HasFoundDecl;
E->MemberExprBits.HasTemplateKWAndArgsInfo = HasTemplateInfo;
E->MemberExprBits.HadMultipleCandidates = Record.readInt();
E->MemberExprBits.NonOdrUseReason = Record.readInt();
E->MemberExprBits.OperatorLoc = Record.readSourceLocation();

if (HasQualifier || HasFoundDecl) {
  DeclAccessPair FoundDecl;
  if (HasFoundDecl) {
    auto *FoundD = Record.readDeclAs<NamedDecl>();
    auto AS = (AccessSpecifier)Record.readInt();
    FoundDecl = DeclAccessPair::make(FoundD, AS);
  } else {
    FoundDecl = DeclAccessPair::make(E->MemberDecl,
                                     E->MemberDecl->getAccess());
  }
  E->getTrailingObjects<MemberExprNameQualifier>()->FoundDecl = FoundDecl;

  NestedNameSpecifierLoc QualifierLoc;
  if (HasQualifier)
    QualifierLoc = Record.readNestedNameSpecifierLoc();
  E->getTrailingObjects<MemberExprNameQualifier>()->QualifierLoc =
      QualifierLoc;
}

if (HasTemplateInfo)
  ReadTemplateKWAndArgsInfo(
      *E->getTrailingObjects<ASTTemplateKWAndArgsInfo>(),
      E->getTrailingObjects<TemplateArgumentLoc>(), NumTemplateArgs);
1069}

1071void ASTStmtReader::VisitObjCIsaExpr(ObjCIsaExpr *E) {
VisitExpr(E);
E->setBase(Record.readSubExpr());
E->setIsaMemberLoc(readSourceLocation());
E->setOpLoc(readSourceLocation());
E->setArrow(Record.readInt());
1077}

1079void ASTStmtReader::
1080VisitObjCIndirectCopyRestoreExpr(ObjCIndirectCopyRestoreExpr *E) {
VisitExpr(E);
E->Operand = Record.readSubExpr();
E->setShouldCopy(Record.readInt());
1084}

1086void ASTStmtReader::VisitObjCBridgedCastExpr(ObjCBridgedCastExpr *E) {
VisitExplicitCastExpr(E);
E->LParenLoc = readSourceLocation();
E->BridgeKeywordLoc = readSourceLocation();
E->Kind = Record.readInt();
1091}

1093void ASTStmtReader::VisitCastExpr(CastExpr *E) {
VisitExpr(E);
unsigned NumBaseSpecs = Record.readInt();
assert(NumBaseSpecs == E->path_size())((void)0);
unsigned HasFPFeatures = Record.readInt();
assert(E->hasStoredFPFeatures() == HasFPFeatures)((void)0);
E->setSubExpr(Record.readSubExpr());
E->setCastKind((CastKind)Record.readInt());
CastExpr::path_iterator BaseI = E->path_begin();
while (NumBaseSpecs--) {
  auto *BaseSpec = new (Record.getContext()) CXXBaseSpecifier;
  *BaseSpec = Record.readCXXBaseSpecifier();
  *BaseI++ = BaseSpec;
}
if (HasFPFeatures)
  *E->getTrailingFPFeatures() =
      FPOptionsOverride::getFromOpaqueInt(Record.readInt());
1110}

1112void ASTStmtReader::VisitBinaryOperator(BinaryOperator *E) {
bool hasFP_Features;
VisitExpr(E);
E->setHasStoredFPFeatures(hasFP_Features = Record.readInt());
E->setOpcode((BinaryOperator::Opcode)Record.readInt());
E->setLHS(Record.readSubExpr());
E->setRHS(Record.readSubExpr());
E->setOperatorLoc(readSourceLocation());
if (hasFP_Features)
  E->setStoredFPFeatures(
      FPOptionsOverride::getFromOpaqueInt(Record.readInt()));
1123}

1125void ASTStmtReader::VisitCompoundAssignOperator(CompoundAssignOperator *E) {
VisitBinaryOperator(E);
E->setComputationLHSType(Record.readType());
E->setComputationResultType(Record.readType());
1129}

1131void ASTStmtReader::VisitConditionalOperator(ConditionalOperator *E) {
VisitExpr(E);
E->SubExprs[ConditionalOperator::COND] = Record.readSubExpr();
E->SubExprs[ConditionalOperator::LHS] = Record.readSubExpr();
E->SubExprs[ConditionalOperator::RHS] = Record.readSubExpr();
E->QuestionLoc = readSourceLocation();
E->ColonLoc = readSourceLocation();
1138}

1140void
1141ASTStmtReader::VisitBinaryConditionalOperator(BinaryConditionalOperator *E) {
VisitExpr(E);
E->OpaqueValue = cast<OpaqueValueExpr>(Record.readSubExpr());
E->SubExprs[BinaryConditionalOperator::COMMON] = Record.readSubExpr();
E->SubExprs[BinaryConditionalOperator::COND] = Record.readSubExpr();
E->SubExprs[BinaryConditionalOperator::LHS] = Record.readSubExpr();
E->SubExprs[BinaryConditionalOperator::RHS] = Record.readSubExpr();
E->QuestionLoc = readSourceLocation();
E->ColonLoc = readSourceLocation();
1150}

1152void ASTStmtReader::VisitImplicitCastExpr(ImplicitCastExpr *E) {
VisitCastExpr(E);
E->setIsPartOfExplicitCast(Record.readInt());
1155}

1157void ASTStmtReader::VisitExplicitCastExpr(ExplicitCastExpr *E) {
VisitCastExpr(E);
E->setTypeInfoAsWritten(readTypeSourceInfo());
1160}

1162void ASTStmtReader::VisitCStyleCastExpr(CStyleCastExpr *E) {
VisitExplicitCastExpr(E);
E->setLParenLoc(readSourceLocation());
E->setRParenLoc(readSourceLocation());
1166}

1168void ASTStmtReader::VisitCompoundLiteralExpr(CompoundLiteralExpr *E) {
VisitExpr(E);
E->setLParenLoc(readSourceLocation());
E->setTypeSourceInfo(readTypeSourceInfo());
E->setInitializer(Record.readSubExpr());
E->setFileScope(Record.readInt());
1174}

1176void ASTStmtReader::VisitExtVectorElementExpr(ExtVectorElementExpr *E) {
VisitExpr(E);
E->setBase(Record.readSubExpr());
E->setAccessor(Record.readIdentifier());
E->setAccessorLoc(readSourceLocation());
1181}

1183void ASTStmtReader::VisitInitListExpr(InitListExpr *E) {
VisitExpr(E);
if (auto *SyntForm = cast_or_null<InitListExpr>(Record.readSubStmt()))
  E->setSyntacticForm(SyntForm);
E->setLBraceLoc(readSourceLocation());
E->setRBraceLoc(readSourceLocation());
bool isArrayFiller = Record.readInt();
Expr *filler = nullptr;
if (isArrayFiller) {
  filler = Record.readSubExpr();
  E->ArrayFillerOrUnionFieldInit = filler;
} else
  E->ArrayFillerOrUnionFieldInit = readDeclAs<FieldDecl>();
E->sawArrayRangeDesignator(Record.readInt());
unsigned NumInits = Record.readInt();
E->reserveInits(Record.getContext(), NumInits);
if (isArrayFiller) {
  for (unsigned I = 0; I != NumInits; ++I) {
    Expr *init = Record.readSubExpr();
    E->updateInit(Record.getContext(), I, init ? init : filler);
  }
} else {
  for (unsigned I = 0; I != NumInits; ++I)
    E->updateInit(Record.getContext(), I, Record.readSubExpr());
}
1208}

1210void ASTStmtReader::VisitDesignatedInitExpr(DesignatedInitExpr *E) {
using Designator = DesignatedInitExpr::Designator;

VisitExpr(E);
unsigned NumSubExprs = Record.readInt();
assert(NumSubExprs == E->getNumSubExprs() && "Wrong number of subexprs")((void)0);
for (unsigned I = 0; I != NumSubExprs; ++I)
  E->setSubExpr(I, Record.readSubExpr());
E->setEqualOrColonLoc(readSourceLocation());
E->setGNUSyntax(Record.readInt());

SmallVector<Designator, 4> Designators;
while (Record.getIdx() < Record.size()) {
  switch ((DesignatorTypes)Record.readInt()) {
  case DESIG_FIELD_DECL: {
    auto *Field = readDeclAs<FieldDecl>();
    SourceLocation DotLoc = readSourceLocation();
    SourceLocation FieldLoc = readSourceLocation();
    Designators.push_back(Designator(Field->getIdentifier(), DotLoc,
                                     FieldLoc));
    Designators.back().setField(Field);
    break;
  }

  case DESIG_FIELD_NAME: {
    const IdentifierInfo *Name = Record.readIdentifier();
    SourceLocation DotLoc = readSourceLocation();
    SourceLocation FieldLoc = readSourceLocation();
    Designators.push_back(Designator(Name, DotLoc, FieldLoc));
    break;
  }

  case DESIG_ARRAY: {
    unsigned Index = Record.readInt();
    SourceLocation LBracketLoc = readSourceLocation();
    SourceLocation RBracketLoc = readSourceLocation();
    Designators.push_back(Designator(Index, LBracketLoc, RBracketLoc));
    break;
  }

  case DESIG_ARRAY_RANGE: {
    unsigned Index = Record.readInt();
    SourceLocation LBracketLoc = readSourceLocation();
    SourceLocation EllipsisLoc = readSourceLocation();
    SourceLocation RBracketLoc = readSourceLocation();
    Designators.push_back(Designator(Index, LBracketLoc, EllipsisLoc,
                                     RBracketLoc));
    break;
  }
  }
}
E->setDesignators(Record.getContext(),
                  Designators.data(), Designators.size());
1263}

1265void ASTStmtReader::VisitDesignatedInitUpdateExpr(DesignatedInitUpdateExpr *E) {
VisitExpr(E);
E->setBase(Record.readSubExpr());
E->setUpdater(Record.readSubExpr());
1269}

1271void ASTStmtReader::VisitNoInitExpr(NoInitExpr *E) {
VisitExpr(E);
1273}

1275void ASTStmtReader::VisitArrayInitLoopExpr(ArrayInitLoopExpr *E) {
VisitExpr(E);
E->SubExprs[0] = Record.readSubExpr();
E->SubExprs[1] = Record.readSubExpr();
1279}

1281void ASTStmtReader::VisitArrayInitIndexExpr(ArrayInitIndexExpr *E) {
VisitExpr(E);
1283}

1285void ASTStmtReader::VisitImplicitValueInitExpr(ImplicitValueInitExpr *E) {
VisitExpr(E);
1287}

1289void ASTStmtReader::VisitVAArgExpr(VAArgExpr *E) {
VisitExpr(E);
E->setSubExpr(Record.readSubExpr());
E->setWrittenTypeInfo(readTypeSourceInfo());
E->setBuiltinLoc(readSourceLocation());
E->setRParenLoc(readSourceLocation());
E->setIsMicrosoftABI(Record.readInt());
1296}

1298void ASTStmtReader::VisitSourceLocExpr(SourceLocExpr *E) {
VisitExpr(E);
E->ParentContext = readDeclAs<DeclContext>();
E->BuiltinLoc = readSourceLocation();
E->RParenLoc = readSourceLocation();
E->SourceLocExprBits.Kind =
    static_cast<SourceLocExpr::IdentKind>(Record.readInt());
1305}

1307void ASTStmtReader::VisitAddrLabelExpr(AddrLabelExpr *E) {
VisitExpr(E);
E->setAmpAmpLoc(readSourceLocation());
E->setLabelLoc(readSourceLocation());
E->setLabel(readDeclAs<LabelDecl>());
1312}

1314void ASTStmtReader::VisitStmtExpr(StmtExpr *E) {
VisitExpr(E);
E->setLParenLoc(readSourceLocation());
E->setRParenLoc(readSourceLocation());
E->setSubStmt(cast_or_null<CompoundStmt>(Record.readSubStmt()));
E->StmtExprBits.TemplateDepth = Record.readInt();
1320}

1322void ASTStmtReader::VisitChooseExpr(ChooseExpr *E) {
VisitExpr(E);
E->setCond(Record.readSubExpr());
E->setLHS(Record.readSubExpr());
E->setRHS(Record.readSubExpr());
E->setBuiltinLoc(readSourceLocation());
E->setRParenLoc(readSourceLocation());
E->setIsConditionTrue(Record.readInt());
1330}

1332void ASTStmtReader::VisitGNUNullExpr(GNUNullExpr *E) {
VisitExpr(E);
E->setTokenLocation(readSourceLocation());
1335}

1337void ASTStmtReader::VisitShuffleVectorExpr(ShuffleVectorExpr *E) {
VisitExpr(E);
SmallVector<Expr *, 16> Exprs;
unsigned NumExprs = Record.readInt();
while (NumExprs--)
  Exprs.push_back(Record.readSubExpr());
E->setExprs(Record.getContext(), Exprs);
E->setBuiltinLoc(readSourceLocation());
E->setRParenLoc(readSourceLocation());
1346}

1348void ASTStmtReader::VisitConvertVectorExpr(ConvertVectorExpr *E) {
VisitExpr(E);
E->BuiltinLoc = readSourceLocation();
E->RParenLoc = readSourceLocation();
E->TInfo = readTypeSourceInfo();
E->SrcExpr = Record.readSubExpr();
1354}

1356void ASTStmtReader::VisitBlockExpr(BlockExpr *E) {
VisitExpr(E);
E->setBlockDecl(readDeclAs<BlockDecl>());
1359}

1361void ASTStmtReader::VisitGenericSelectionExpr(GenericSelectionExpr *E) {
VisitExpr(E);

unsigned NumAssocs = Record.readInt();
assert(NumAssocs == E->getNumAssocs() && "Wrong NumAssocs!")((void)0);
E->ResultIndex = Record.readInt();
E->GenericSelectionExprBits.GenericLoc = readSourceLocation();
E->DefaultLoc = readSourceLocation();
E->RParenLoc = readSourceLocation();

Stmt **Stmts = E->getTrailingObjects<Stmt *>();
// Add 1 to account for the controlling expression which is the first
// expression in the trailing array of Stmt *. This is not needed for
// the trailing array of TypeSourceInfo *.
for (unsigned I = 0, N = NumAssocs + 1; I < N; ++I)
  Stmts[I] = Record.readSubExpr();

TypeSourceInfo **TSIs = E->getTrailingObjects<TypeSourceInfo *>();
for (unsigned I = 0, N = NumAssocs; I < N; ++I)
  TSIs[I] = readTypeSourceInfo();
1381}

1383void ASTStmtReader::VisitPseudoObjectExpr(PseudoObjectExpr *E) {
VisitExpr(E);
unsigned numSemanticExprs = Record.readInt();
assert(numSemanticExprs + 1 == E->PseudoObjectExprBits.NumSubExprs)((void)0);
E->PseudoObjectExprBits.ResultIndex = Record.readInt();

// Read the syntactic expression.
E->getSubExprsBuffer()[0] = Record.readSubExpr();

// Read all the semantic expressions.
for (unsigned i = 0; i != numSemanticExprs; ++i) {
  Expr *subExpr = Record.readSubExpr();
  E->getSubExprsBuffer()[i+1] = subExpr;
}
1397}

1399void ASTStmtReader::VisitAtomicExpr(AtomicExpr *E) {
VisitExpr(E);
E->Op = AtomicExpr::AtomicOp(Record.readInt());
E->NumSubExprs = AtomicExpr::getNumSubExprs(E->Op);
for (unsigned I = 0; I != E->NumSubExprs; ++I)
  E->SubExprs[I] = Record.readSubExpr();
E->BuiltinLoc = readSourceLocation();
E->RParenLoc = readSourceLocation();
1407}

1409//===----------------------------------------------------------------------===//
1410// Objective-C Expressions and Statements

1412void ASTStmtReader::VisitObjCStringLiteral(ObjCStringLiteral *E) {
VisitExpr(E);
E->setString(cast<StringLiteral>(Record.readSubStmt()));
E->setAtLoc(readSourceLocation());
1416}

1418void ASTStmtReader::VisitObjCBoxedExpr(ObjCBoxedExpr *E) {
VisitExpr(E);
// could be one of several IntegerLiteral, FloatLiteral, etc.
E->SubExpr = Record.readSubStmt();
E->BoxingMethod = readDeclAs<ObjCMethodDecl>();
E->Range = readSourceRange();
1424}

1426void ASTStmtReader::VisitObjCArrayLiteral(ObjCArrayLiteral *E) {
VisitExpr(E);
unsigned NumElements = Record.readInt();
assert(NumElements == E->getNumElements() && "Wrong number of elements")((void)0);
Expr **Elements = E->getElements();
for (unsigned I = 0, N = NumElements; I != N; ++I)
  Elements[I] = Record.readSubExpr();
E->ArrayWithObjectsMethod = readDeclAs<ObjCMethodDecl>();
E->Range = readSourceRange();
1435}

1437void ASTStmtReader::VisitObjCDictionaryLiteral(ObjCDictionaryLiteral *E) {
VisitExpr(E);
unsigned NumElements = Record.readInt();
assert(NumElements == E->getNumElements() && "Wrong number of elements")((void)0);
bool HasPackExpansions = Record.readInt();
assert(HasPackExpansions == E->HasPackExpansions &&"Pack expansion mismatch")((void)0);
auto *KeyValues =
    E->getTrailingObjects<ObjCDictionaryLiteral::KeyValuePair>();
auto *Expansions =
    E->getTrailingObjects<ObjCDictionaryLiteral::ExpansionData>();
for (unsigned I = 0; I != NumElements; ++I) {
  KeyValues[I].Key = Record.readSubExpr();
  KeyValues[I].Value = Record.readSubExpr();
  if (HasPackExpansions) {
    Expansions[I].EllipsisLoc = readSourceLocation();
    Expansions[I].NumExpansionsPlusOne = Record.readInt();
  }
}
E->DictWithObjectsMethod = readDeclAs<ObjCMethodDecl>();
E->Range = readSourceRange();
1457}

1459void ASTStmtReader::VisitObjCEncodeExpr(ObjCEncodeExpr *E) {
VisitExpr(E);
E->setEncodedTypeSourceInfo(readTypeSourceInfo());
E->setAtLoc(readSourceLocation());
E->setRParenLoc(readSourceLocation());
1464}

1466void ASTStmtReader::VisitObjCSelectorExpr(ObjCSelectorExpr *E) {
VisitExpr(E);
E->setSelector(Record.readSelector());
E->setAtLoc(readSourceLocation());
E->setRParenLoc(readSourceLocation());
1471}

1473void ASTStmtReader::VisitObjCProtocolExpr(ObjCProtocolExpr *E) {
VisitExpr(E);
E->setProtocol(readDeclAs<ObjCProtocolDecl>());
E->setAtLoc(readSourceLocation());
E->ProtoLoc = readSourceLocation();
E->setRParenLoc(readSourceLocation());
1479}

1481void ASTStmtReader::VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) {
VisitExpr(E);
E->setDecl(readDeclAs<ObjCIvarDecl>());
E->setLocation(readSourceLocation());
E->setOpLoc(readSourceLocation());
E->setBase(Record.readSubExpr());
E->setIsArrow(Record.readInt());
E->setIsFreeIvar(Record.readInt());
1489}

1491void ASTStmtReader::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E) {
VisitExpr(E);
unsigned MethodRefFlags = Record.readInt();
bool Implicit = Record.readInt() != 0;
if (Implicit) {
  auto *Getter = readDeclAs<ObjCMethodDecl>();
  auto *Setter = readDeclAs<ObjCMethodDecl>();
  E->setImplicitProperty(Getter, Setter, MethodRefFlags);
} else {
  E->setExplicitProperty(readDeclAs<ObjCPropertyDecl>(), MethodRefFlags);
}
E->setLocation(readSourceLocation());
E->setReceiverLocation(readSourceLocation());
switch (Record.readInt()) {
case 0:
  E->setBase(Record.readSubExpr());
  break;
case 1:
  E->setSuperReceiver(Record.readType());
  break;
case 2:
  E->setClassReceiver(readDeclAs<ObjCInterfaceDecl>());
  break;
}
1515}

1517void ASTStmtReader::VisitObjCSubscriptRefExpr(ObjCSubscriptRefExpr *E) {
VisitExpr(E);
E->setRBracket(readSourceLocation());
E->setBaseExpr(Record.readSubExpr());
E->setKeyExpr(Record.readSubExpr());
E->GetAtIndexMethodDecl = readDeclAs<ObjCMethodDecl>();
E->SetAtIndexMethodDecl = readDeclAs<ObjCMethodDecl>();
1524}

1526void ASTStmtReader::VisitObjCMessageExpr(ObjCMessageExpr *E) {
VisitExpr(E);
assert(Record.peekInt() == E->getNumArgs())((void)0);
Record.skipInts(1);
unsigned NumStoredSelLocs = Record.readInt();
E->SelLocsKind = Record.readInt();
E->setDelegateInitCall(Record.readInt());
E->IsImplicit = Record.readInt();
auto Kind = static_cast<ObjCMessageExpr::ReceiverKind>(Record.readInt());
switch (Kind) {
case ObjCMessageExpr::Instance:
  E->setInstanceReceiver(Record.readSubExpr());
  break;

case ObjCMessageExpr::Class:
  E->setClassReceiver(readTypeSourceInfo());
  break;

case ObjCMessageExpr::SuperClass:
case ObjCMessageExpr::SuperInstance: {
  QualType T = Record.readType();
  SourceLocation SuperLoc = readSourceLocation();
  E->setSuper(SuperLoc, T, Kind == ObjCMessageExpr::SuperInstance);
  break;
}
}

assert(Kind == E->getReceiverKind())((void)0);

if (Record.readInt())
  E->setMethodDecl(readDeclAs<ObjCMethodDecl>());
else
  E->setSelector(Record.readSelector());

E->LBracLoc = readSourceLocation();
E->RBracLoc = readSourceLocation();

for (unsigned I = 0, N = E->getNumArgs(); I != N; ++I)
  E->setArg(I, Record.readSubExpr());

SourceLocation *Locs = E->getStoredSelLocs();
for (unsigned I = 0; I != NumStoredSelLocs; ++I)
  Locs[I] = readSourceLocation();
1569}

1571void ASTStmtReader::VisitObjCForCollectionStmt(ObjCForCollectionStmt *S) {
VisitStmt(S);
S->setElement(Record.readSubStmt());
S->setCollection(Record.readSubExpr());
S->setBody(Record.readSubStmt());
S->setForLoc(readSourceLocation());
S->setRParenLoc(readSourceLocation());
1578}

1580void ASTStmtReader::VisitObjCAtCatchStmt(ObjCAtCatchStmt *S) {
VisitStmt(S);
S->setCatchBody(Record.readSubStmt());
S->setCatchParamDecl(readDeclAs<VarDecl>());
S->setAtCatchLoc(readSourceLocation());
S->setRParenLoc(readSourceLocation());
1586}

1588void ASTStmtReader::VisitObjCAtFinallyStmt(ObjCAtFinallyStmt *S) {
VisitStmt(S);
S->setFinallyBody(Record.readSubStmt());
S->setAtFinallyLoc(readSourceLocation());
1592}

1594void ASTStmtReader::VisitObjCAutoreleasePoolStmt(ObjCAutoreleasePoolStmt *S) {
VisitStmt(S); // FIXME: no test coverage.
S->setSubStmt(Record.readSubStmt());
S->setAtLoc(readSourceLocation());
1598}

1600void ASTStmtReader::VisitObjCAtTryStmt(ObjCAtTryStmt *S) {
VisitStmt(S);
assert(Record.peekInt() == S->getNumCatchStmts())((void)0);
Record.skipInts(1);
bool HasFinally = Record.readInt();
S->setTryBody(Record.readSubStmt());
for (unsigned I = 0, N = S->getNumCatchStmts(); I != N; ++I)
  S->setCatchStmt(I, cast_or_null<ObjCAtCatchStmt>(Record.readSubStmt()));

if (HasFinally)
  S->setFinallyStmt(Record.readSubStmt());
S->setAtTryLoc(readSourceLocation());
1612}

1614void ASTStmtReader::VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt *S) {
VisitStmt(S); // FIXME: no test coverage.
S->setSynchExpr(Record.readSubStmt());
S->setSynchBody(Record.readSubStmt());
S->setAtSynchronizedLoc(readSourceLocation());
1619}

1621void ASTStmtReader::VisitObjCAtThrowStmt(ObjCAtThrowStmt *S) {
VisitStmt(S); // FIXME: no test coverage.
S->setThrowExpr(Record.readSubStmt());
S->setThrowLoc(readSourceLocation());
1625}

1627void ASTStmtReader::VisitObjCBoolLiteralExpr(ObjCBoolLiteralExpr *E) {
VisitExpr(E);
E->setValue(Record.readInt());
E->setLocation(readSourceLocation());
1631}

1633void ASTStmtReader::VisitObjCAvailabilityCheckExpr(ObjCAvailabilityCheckExpr *E) {
VisitExpr(E);
SourceRange R = Record.readSourceRange();
E->AtLoc = R.getBegin();
E->RParen = R.getEnd();
E->VersionToCheck = Record.readVersionTuple();
1639}

1641//===----------------------------------------------------------------------===//
1642// C++ Expressions and Statements
1643//===----------------------------------------------------------------------===//

1645void ASTStmtReader::VisitCXXCatchStmt(CXXCatchStmt *S) {
VisitStmt(S);
S->CatchLoc = readSourceLocation();
S->ExceptionDecl = readDeclAs<VarDecl>();
S->HandlerBlock = Record.readSubStmt();
1650}

1652void ASTStmtReader::VisitCXXTryStmt(CXXTryStmt *S) {
VisitStmt(S);
assert(Record.peekInt() == S->getNumHandlers() && "NumStmtFields is wrong ?")((void)0);
Record.skipInts(1);
S->TryLoc = readSourceLocation();
S->getStmts()[0] = Record.readSubStmt();
for (unsigned i = 0, e = S->getNumHandlers(); i != e; ++i)
  S->getStmts()[i + 1] = Record.readSubStmt();
1660}

1662void ASTStmtReader::VisitCXXForRangeStmt(CXXForRangeStmt *S) {
VisitStmt(S);
S->ForLoc = readSourceLocation();
S->CoawaitLoc = readSourceLocation();
S->ColonLoc = readSourceLocation();
S->RParenLoc = readSourceLocation();
S->setInit(Record.readSubStmt());
S->setRangeStmt(Record.readSubStmt());
S->setBeginStmt(Record.readSubStmt());
S->setEndStmt(Record.readSubStmt());
S->setCond(Record.readSubExpr());
S->setInc(Record.readSubExpr());
S->setLoopVarStmt(Record.readSubStmt());
S->setBody(Record.readSubStmt());
1676}

1678void ASTStmtReader::VisitMSDependentExistsStmt(MSDependentExistsStmt *S) {
VisitStmt(S);
S->KeywordLoc = readSourceLocation();
S->IsIfExists = Record.readInt();
S->QualifierLoc = Record.readNestedNameSpecifierLoc();
S->NameInfo = Record.readDeclarationNameInfo();
S->SubStmt = Record.readSubStmt();
1685}

1687void ASTStmtReader::VisitCXXOperatorCallExpr(CXXOperatorCallExpr *E) {
VisitCallExpr(E);
E->CXXOperatorCallExprBits.OperatorKind = Record.readInt();
E->Range = Record.readSourceRange();
1691}

1693void ASTStmtReader::VisitCXXRewrittenBinaryOperator(
  CXXRewrittenBinaryOperator *E) {
VisitExpr(E);
E->CXXRewrittenBinaryOperatorBits.IsReversed = Record.readInt();
E->SemanticForm = Record.readSubExpr();
1698}

1700void ASTStmtReader::VisitCXXConstructExpr(CXXConstructExpr *E) {
VisitExpr(E);

unsigned NumArgs = Record.readInt();
assert((NumArgs == E->getNumArgs()) && "Wrong NumArgs!")((void)0);

E->CXXConstructExprBits.Elidable = Record.readInt();
E->CXXConstructExprBits.HadMultipleCandidates = Record.readInt();
E->CXXConstructExprBits.ListInitialization = Record.readInt();
E->CXXConstructExprBits.StdInitListInitialization = Record.readInt();
E->CXXConstructExprBits.ZeroInitialization = Record.readInt();
E->CXXConstructExprBits.ConstructionKind = Record.readInt();
E->CXXConstructExprBits.Loc = readSourceLocation();
E->Constructor = readDeclAs<CXXConstructorDecl>();
E->ParenOrBraceRange = readSourceRange();

for (unsigned I = 0; I != NumArgs; ++I)
  E->setArg(I, Record.readSubExpr());
1718}

1720void ASTStmtReader::VisitCXXInheritedCtorInitExpr(CXXInheritedCtorInitExpr *E) {
VisitExpr(E);
E->Constructor = readDeclAs<CXXConstructorDecl>();
E->Loc = readSourceLocation();
E->ConstructsVirtualBase = Record.readInt();
E->InheritedFromVirtualBase = Record.readInt();
1726}

1728void ASTStmtReader::VisitCXXTemporaryObjectExpr(CXXTemporaryObjectExpr *E) {
VisitCXXConstructExpr(E);
E->TSI = readTypeSourceInfo();
1731}

1733void ASTStmtReader::VisitLambdaExpr(LambdaExpr *E) {
VisitExpr(E);
unsigned NumCaptures = Record.readInt();
(void)NumCaptures;
assert(NumCaptures == E->LambdaExprBits.NumCaptures)((void)0);
E->IntroducerRange = readSourceRange();
E->LambdaExprBits.CaptureDefault = Record.readInt();
E->CaptureDefaultLoc = readSourceLocation();
E->LambdaExprBits.ExplicitParams = Record.readInt();
E->LambdaExprBits.ExplicitResultType = Record.readInt();
E->ClosingBrace = readSourceLocation();

// Read capture initializers.
for (LambdaExpr::capture_init_iterator C = E->capture_init_begin(),
                                       CEnd = E->capture_init_end();
     C != CEnd; ++C)
  *C = Record.readSubExpr();

// The body will be lazily deserialized when needed from the call operator
// declaration.
1753}

1755void
1756ASTStmtReader::VisitCXXStdInitializerListExpr(CXXStdInitializerListExpr *E) {
VisitExpr(E);
E->SubExpr = Record.readSubExpr();
1759}

1761void ASTStmtReader::VisitCXXNamedCastExpr(CXXNamedCastExpr *E) {
VisitExplicitCastExpr(E);
SourceRange R = readSourceRange();
E->Loc = R.getBegin();
E->RParenLoc = R.getEnd();
R = readSourceRange();
E->AngleBrackets = R;
1768}

1770void ASTStmtReader::VisitCXXStaticCastExpr(CXXStaticCastExpr *E) {
return VisitCXXNamedCastExpr(E);
1772}

1774void ASTStmtReader::VisitCXXDynamicCastExpr(CXXDynamicCastExpr *E) {
return VisitCXXNamedCastExpr(E);
1776}

1778void ASTStmtReader::VisitCXXReinterpretCastExpr(CXXReinterpretCastExpr *E) {
return VisitCXXNamedCastExpr(E);
1780}

1782void ASTStmtReader::VisitCXXAddrspaceCastExpr(CXXAddrspaceCastExpr *E) {
return VisitCXXNamedCastExpr(E);
1784}

1786void ASTStmtReader::VisitCXXConstCastExpr(CXXConstCastExpr *E) {
return VisitCXXNamedCastExpr(E);
1788}

1790void ASTStmtReader::VisitCXXFunctionalCastExpr(CXXFunctionalCastExpr *E) {
VisitExplicitCastExpr(E);
E->setLParenLoc(readSourceLocation());
E->setRParenLoc(readSourceLocation());
1794}

1796void ASTStmtReader::VisitBuiltinBitCastExpr(BuiltinBitCastExpr *E) {
VisitExplicitCastExpr(E);
E->KWLoc = readSourceLocation();
E->RParenLoc = readSourceLocation();
1800}

1802void ASTStmtReader::VisitUserDefinedLiteral(UserDefinedLiteral *E) {
VisitCallExpr(E);
E->UDSuffixLoc = readSourceLocation();
1805}

1807void ASTStmtReader::VisitCXXBoolLiteralExpr(CXXBoolLiteralExpr *E) {
VisitExpr(E);
E->setValue(Record.readInt());
E->setLocation(readSourceLocation());
1811}

1813void ASTStmtReader::VisitCXXNullPtrLiteralExpr(CXXNullPtrLiteralExpr *E) {
VisitExpr(E);
E->setLocation(readSourceLocation());
1816}

1818void ASTStmtReader::VisitCXXTypeidExpr(CXXTypeidExpr *E) {
VisitExpr(E);
E->setSourceRange(readSourceRange());
if (E->isTypeOperand())
  E->Operand = readTypeSourceInfo();
else
  E->Operand = Record.readSubExpr();
1825}

1827void ASTStmtReader::VisitCXXThisExpr(CXXThisExpr *E) {
VisitExpr(E);
E->setLocation(readSourceLocation());
E->setImplicit(Record.readInt());
1831}

1833void ASTStmtReader::VisitCXXThrowExpr(CXXThrowExpr *E) {
VisitExpr(E);
E->CXXThrowExprBits.ThrowLoc = readSourceLocation();
E->Operand = Record.readSubExpr();
E->CXXThrowExprBits.IsThrownVariableInScope = Record.readInt();
1838}

1840void ASTStmtReader::VisitCXXDefaultArgExpr(CXXDefaultArgExpr *E) {
VisitExpr(E);
E->Param = readDeclAs<ParmVarDecl>();
E->UsedContext = readDeclAs<DeclContext>();
E->CXXDefaultArgExprBits.Loc = readSourceLocation();
1845}

1847void ASTStmtReader::VisitCXXDefaultInitExpr(CXXDefaultInitExpr *E) {
VisitExpr(E);
E->Field = readDeclAs<FieldDecl>();
E->UsedContext = readDeclAs<DeclContext>();
E->CXXDefaultInitExprBits.Loc = readSourceLocation();
1852}

1854void ASTStmtReader::VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E) {
VisitExpr(E);
E->setTemporary(Record.readCXXTemporary());
E->setSubExpr(Record.readSubExpr());
1858}

1860void ASTStmtReader::VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *E) {
VisitExpr(E);
E->TypeInfo = readTypeSourceInfo();
E->CXXScalarValueInitExprBits.RParenLoc = readSourceLocation();
1864}

1866void ASTStmtReader::VisitCXXNewExpr(CXXNewExpr *E) {
VisitExpr(E);

bool IsArray = Record.readInt();
bool HasInit = Record.readInt();
unsigned NumPlacementArgs = Record.readInt();
bool IsParenTypeId = Record.readInt();

E->CXXNewExprBits.IsGlobalNew = Record.readInt();
E->CXXNewExprBits.ShouldPassAlignment = Record.readInt();
E->CXXNewExprBits.UsualArrayDeleteWantsSize = Record.readInt();
E->CXXNewExprBits.StoredInitializationStyle = Record.readInt();

assert((IsArray == E->isArray()) && "Wrong IsArray!")((void)0);
assert((HasInit == E->hasInitializer()) && "Wrong HasInit!")((void)0);
assert((NumPlacementArgs == E->getNumPlacementArgs()) &&((void)0)
       "Wrong NumPlacementArgs!")((void)0);
assert((IsParenTypeId == E->isParenTypeId()) && "Wrong IsParenTypeId!")((void)0);
(void)IsArray;
(void)HasInit;
(void)NumPlacementArgs;

E->setOperatorNew(readDeclAs<FunctionDecl>());
E->setOperatorDelete(readDeclAs<FunctionDecl>());
E->AllocatedTypeInfo = readTypeSourceInfo();
if (IsParenTypeId)
  E->getTrailingObjects<SourceRange>()[0] = readSourceRange();
E->Range = readSourceRange();
E->DirectInitRange = readSourceRange();

// Install all the subexpressions.
for (CXXNewExpr::raw_arg_iterator I = E->raw_arg_begin(),
                                  N = E->raw_arg_end();
     I != N; ++I)
  *I = Record.readSubStmt();
1901}

1903void ASTStmtReader::VisitCXXDeleteExpr(CXXDeleteExpr *E) {
VisitExpr(E);
E->CXXDeleteExprBits.GlobalDelete = Record.readInt();
E->CXXDeleteExprBits.ArrayForm = Record.readInt();
E->CXXDeleteExprBits.ArrayFormAsWritten = Record.readInt();
E->CXXDeleteExprBits.UsualArrayDeleteWantsSize = Record.readInt();
E->OperatorDelete = readDeclAs<FunctionDecl>();
E->Argument = Record.readSubExpr();
E->CXXDeleteExprBits.Loc = readSourceLocation();
1912}

1914void ASTStmtReader::VisitCXXPseudoDestructorExpr(CXXPseudoDestructorExpr *E) {
VisitExpr(E);

E->Base = Record.readSubExpr();
E->IsArrow = Record.readInt();
E->OperatorLoc = readSourceLocation();
E->QualifierLoc = Record.readNestedNameSpecifierLoc();
E->ScopeType = readTypeSourceInfo();
E->ColonColonLoc = readSourceLocation();
E->TildeLoc = readSourceLocation();

IdentifierInfo *II = Record.readIdentifier();
if (II)
  E->setDestroyedType(II, readSourceLocation());
else
  E->setDestroyedType(readTypeSourceInfo());
1930}

1932void ASTStmtReader::VisitExprWithCleanups(ExprWithCleanups *E) {
VisitExpr(E);

unsigned NumObjects = Record.readInt();
assert(NumObjects == E->getNumObjects())((void)0);
for (unsigned i = 0; i != NumObjects; ++i) {
  unsigned CleanupKind = Record.readInt();
  ExprWithCleanups::CleanupObject Obj;
  if (CleanupKind == COK_Block)
    Obj = readDeclAs<BlockDecl>();
  else if (CleanupKind == COK_CompoundLiteral)
    Obj = cast<CompoundLiteralExpr>(Record.readSubExpr());
  else
    llvm_unreachable("unexpected cleanup object type")__builtin_unreachable();
  E->getTrailingObjects<ExprWithCleanups::CleanupObject>()[i] = Obj;
}

E->ExprWithCleanupsBits.CleanupsHaveSideEffects = Record.readInt();
E->SubExpr = Record.readSubExpr();
1951}

1953void ASTStmtReader::VisitCXXDependentScopeMemberExpr(
  CXXDependentScopeMemberExpr *E) {
VisitExpr(E);

bool HasTemplateKWAndArgsInfo = Record.readInt();
unsigned NumTemplateArgs = Record.readInt();
bool HasFirstQualifierFoundInScope = Record.readInt();

assert((HasTemplateKWAndArgsInfo == E->hasTemplateKWAndArgsInfo()) &&((void)0)
       "Wrong HasTemplateKWAndArgsInfo!")((void)0);
assert(((void)0)
    (HasFirstQualifierFoundInScope == E->hasFirstQualifierFoundInScope()) &&((void)0)
    "Wrong HasFirstQualifierFoundInScope!")((void)0);

if (HasTemplateKWAndArgsInfo)
  ReadTemplateKWAndArgsInfo(
      *E->getTrailingObjects<ASTTemplateKWAndArgsInfo>(),
      E->getTrailingObjects<TemplateArgumentLoc>(), NumTemplateArgs);

assert((NumTemplateArgs == E->getNumTemplateArgs()) &&((void)0)
       "Wrong NumTemplateArgs!")((void)0);

E->CXXDependentScopeMemberExprBits.IsArrow = Record.readInt();
E->CXXDependentScopeMemberExprBits.OperatorLoc = readSourceLocation();
E->BaseType = Record.readType();
E->QualifierLoc = Record.readNestedNameSpecifierLoc();
E->Base = Record.readSubExpr();

if (HasFirstQualifierFoundInScope)
  *E->getTrailingObjects<NamedDecl *>() = readDeclAs<NamedDecl>();

E->MemberNameInfo = Record.readDeclarationNameInfo();
1985}

1987void
1988ASTStmtReader::VisitDependentScopeDeclRefExpr(DependentScopeDeclRefExpr *E) {
VisitExpr(E);

if (Record.readInt()) // HasTemplateKWAndArgsInfo
  ReadTemplateKWAndArgsInfo(
      *E->getTrailingObjects<ASTTemplateKWAndArgsInfo>(),
      E->getTrailingObjects<TemplateArgumentLoc>(),
      /*NumTemplateArgs=*/Record.readInt());

E->QualifierLoc = Record.readNestedNameSpecifierLoc();
E->NameInfo = Record.readDeclarationNameInfo();
1999}

2001void
2002ASTStmtReader::VisitCXXUnresolvedConstructExpr(CXXUnresolvedConstructExpr *E) {
VisitExpr(E);
assert(Record.peekInt() == E->getNumArgs() &&((void)0)
       "Read wrong record during creation ?")((void)0);
Record.skipInts(1);
for (unsigned I = 0, N = E->getNumArgs(); I != N; ++I)
  E->setArg(I, Record.readSubExpr());
E->TSI = readTypeSourceInfo();
E->setLParenLoc(readSourceLocation());
E->setRParenLoc(readSourceLocation());
2012}

2014void ASTStmtReader::VisitOverloadExpr(OverloadExpr *E) {
VisitExpr(E);

unsigned NumResults = Record.readInt();
bool HasTemplateKWAndArgsInfo = Record.readInt();
assert((E->getNumDecls() == NumResults) && "Wrong NumResults!")((void)0);
assert((E->hasTemplateKWAndArgsInfo() == HasTemplateKWAndArgsInfo) &&((void)0)
       "Wrong HasTemplateKWAndArgsInfo!")((void)0);

if (HasTemplateKWAndArgsInfo) {
  unsigned NumTemplateArgs = Record.readInt();
  ReadTemplateKWAndArgsInfo(*E->getTrailingASTTemplateKWAndArgsInfo(),
                            E->getTrailingTemplateArgumentLoc(),
                            NumTemplateArgs);
  assert((E->getNumTemplateArgs() == NumTemplateArgs) &&((void)0)
         "Wrong NumTemplateArgs!")((void)0);
}

UnresolvedSet<8> Decls;
for (unsigned I = 0; I != NumResults; ++I) {
  auto *D = readDeclAs<NamedDecl>();
  auto AS = (AccessSpecifier)Record.readInt();
  Decls.addDecl(D, AS);
}

DeclAccessPair *Results = E->getTrailingResults();
UnresolvedSetIterator Iter = Decls.begin();
for (unsigned I = 0; I != NumResults; ++I) {
  Results[I] = (Iter + I).getPair();
}

E->NameInfo = Record.readDeclarationNameInfo();
E->QualifierLoc = Record.readNestedNameSpecifierLoc();
2047}

2049void ASTStmtReader::VisitUnresolvedMemberExpr(UnresolvedMemberExpr *E) {
VisitOverloadExpr(E);
E->UnresolvedMemberExprBits.IsArrow = Record.readInt();
E->UnresolvedMemberExprBits.HasUnresolvedUsing = Record.readInt();
E->Base = Record.readSubExpr();
E->BaseType = Record.readType();
E->OperatorLoc = readSourceLocation();
2056}

2058void ASTStmtReader::VisitUnresolvedLookupExpr(UnresolvedLookupExpr *E) {
VisitOverloadExpr(E);
E->UnresolvedLookupExprBits.RequiresADL = Record.readInt();
E->UnresolvedLookupExprBits.Overloaded = Record.readInt();
E->NamingClass = readDeclAs<CXXRecordDecl>();
2063}

2065void ASTStmtReader::VisitTypeTraitExpr(TypeTraitExpr *E) {
VisitExpr(E);
E->TypeTraitExprBits.NumArgs = Record.readInt();
E->TypeTraitExprBits.Kind = Record.readInt();
E->TypeTraitExprBits.Value = Record.readInt();
SourceRange Range = readSourceRange();
E->Loc = Range.getBegin();
E->RParenLoc = Range.getEnd();

auto **Args = E->getTrailingObjects<TypeSourceInfo *>();
for (unsigned I = 0, N = E->getNumArgs(); I != N; ++I)
  Args[I] = readTypeSourceInfo();
2077}

2079void ASTStmtReader::VisitArrayTypeTraitExpr(ArrayTypeTraitExpr *E) {
VisitExpr(E);
E->ATT = (ArrayTypeTrait)Record.readInt();
E->Value = (unsigned int)Record.readInt();
SourceRange Range = readSourceRange();
E->Loc = Range.getBegin();
E->RParen = Range.getEnd();
E->QueriedType = readTypeSourceInfo();
E->Dimension = Record.readSubExpr();
2088}

2090void ASTStmtReader::VisitExpressionTraitExpr(ExpressionTraitExpr *E) {
VisitExpr(E);
E->ET = (ExpressionTrait)Record.readInt();
E->Value = (bool)Record.readInt();
SourceRange Range = readSourceRange();
E->QueriedExpression = Record.readSubExpr();
E->Loc = Range.getBegin();
E->RParen = Range.getEnd();
2098}

2100void ASTStmtReader::VisitCXXNoexceptExpr(CXXNoexceptExpr *E) {
VisitExpr(E);
E->CXXNoexceptExprBits.Value = Record.readInt();
E->Range = readSourceRange();
E->Operand = Record.readSubExpr();
2105}

2107void ASTStmtReader::VisitPackExpansionExpr(PackExpansionExpr *E) {
VisitExpr(E);
E->EllipsisLoc = readSourceLocation();
E->NumExpansions = Record.readInt();
E->Pattern = Record.readSubExpr();
2112}

2114void ASTStmtReader::VisitSizeOfPackExpr(SizeOfPackExpr *E) {
VisitExpr(E);
unsigned NumPartialArgs = Record.readInt();
E->OperatorLoc = readSourceLocation();
E->PackLoc = readSourceLocation();
E->RParenLoc = readSourceLocation();
E->Pack = Record.readDeclAs<NamedDecl>();
if (E->isPartiallySubstituted()) {
  assert(E->Length == NumPartialArgs)((void)0);
  for (auto *I = E->getTrailingObjects<TemplateArgument>(),
            *E = I + NumPartialArgs;
       I != E; ++I)
    new (I) TemplateArgument(Record.readTemplateArgument());
} else if (!E->isValueDependent()) {
  E->Length = Record.readInt();
}
2130}

2132void ASTStmtReader::VisitSubstNonTypeTemplateParmExpr(
                                            SubstNonTypeTemplateParmExpr *E) {
VisitExpr(E);
E->ParamAndRef.setPointer(readDeclAs<NonTypeTemplateParmDecl>());
E->ParamAndRef.setInt(Record.readInt());
E->SubstNonTypeTemplateParmExprBits.NameLoc = readSourceLocation();
E->Replacement = Record.readSubExpr();
2139}

2141void ASTStmtReader::VisitSubstNonTypeTemplateParmPackExpr(
                                        SubstNonTypeTemplateParmPackExpr *E) {
VisitExpr(E);
E->Param = readDeclAs<NonTypeTemplateParmDecl>();
TemplateArgument ArgPack = Record.readTemplateArgument();
if (ArgPack.getKind() != TemplateArgument::Pack)
  return;

E->Arguments = ArgPack.pack_begin();
E->NumArguments = ArgPack.pack_size();
E->NameLoc = readSourceLocation();
2152}

2154void ASTStmtReader::VisitFunctionParmPackExpr(FunctionParmPackExpr *E) {
VisitExpr(E);
E->NumParameters = Record.readInt();
E->ParamPack = readDeclAs<ParmVarDecl>();
E->NameLoc = readSourceLocation();
auto **Parms = E->getTrailingObjects<VarDecl *>();
for (unsigned i = 0, n = E->NumParameters; i != n; ++i)
  Parms[i] = readDeclAs<VarDecl>();
2162}

2164void ASTStmtReader::VisitMaterializeTemporaryExpr(MaterializeTemporaryExpr *E) {
VisitExpr(E);
bool HasMaterialzedDecl = Record.readInt();
if (HasMaterialzedDecl)
  E->State = cast<LifetimeExtendedTemporaryDecl>(Record.readDecl());
else
  E->State = Record.readSubExpr();
2171}

2173void ASTStmtReader::VisitCXXFoldExpr(CXXFoldExpr *E) {
VisitExpr(E);
E->LParenLoc = readSourceLocation();
E->EllipsisLoc = readSourceLocation();
E->RParenLoc = readSourceLocation();
E->NumExpansions = Record.readInt();
E->SubExprs[0] = Record.readSubExpr();
E->SubExprs[1] = Record.readSubExpr();
E->SubExprs[2] = Record.readSubExpr();
E->Opcode = (BinaryOperatorKind)Record.readInt();
2183}

2185void ASTStmtReader::VisitOpaqueValueExpr(OpaqueValueExpr *E) {
VisitExpr(E);
E->SourceExpr = Record.readSubExpr();
E->OpaqueValueExprBits.Loc = readSourceLocation();
E->setIsUnique(Record.readInt());
2190}

2192void ASTStmtReader::VisitTypoExpr(TypoExpr *E) {
llvm_unreachable("Cannot read TypoExpr nodes")__builtin_unreachable();
2194}

2196void ASTStmtReader::VisitRecoveryExpr(RecoveryExpr *E) {
VisitExpr(E);
unsigned NumArgs = Record.readInt();
E->BeginLoc = readSourceLocation();
E->EndLoc = readSourceLocation();
assert((NumArgs + 0LL ==((void)0)
        std::distance(E->children().begin(), E->children().end())) &&((void)0)
       "Wrong NumArgs!")((void)0);
(void)NumArgs;
for (Stmt *&Child : E->children())
  Child = Record.readSubStmt();
2207}

2209//===----------------------------------------------------------------------===//
2210// Microsoft Expressions and Statements
2211//===----------------------------------------------------------------------===//
2212void ASTStmtReader::VisitMSPropertyRefExpr(MSPropertyRefExpr *E) {
VisitExpr(E);
E->IsArrow = (Record.readInt() != 0);
E->BaseExpr = Record.readSubExpr();
E->QualifierLoc = Record.readNestedNameSpecifierLoc();
E->MemberLoc = readSourceLocation();
E->TheDecl = readDeclAs<MSPropertyDecl>();
2219}

2221void ASTStmtReader::VisitMSPropertySubscriptExpr(MSPropertySubscriptExpr *E) {
VisitExpr(E);
E->setBase(Record.readSubExpr());
E->setIdx(Record.readSubExpr());
E->setRBracketLoc(readSourceLocation());
2226}

2228void ASTStmtReader::VisitCXXUuidofExpr(CXXUuidofExpr *E) {
VisitExpr(E);
E->setSourceRange(readSourceRange());
E->Guid = readDeclAs<MSGuidDecl>();
if (E->isTypeOperand())
  E->Operand = readTypeSourceInfo();
else
  E->Operand = Record.readSubExpr();
2236}

2238void ASTStmtReader::VisitSEHLeaveStmt(SEHLeaveStmt *S) {
VisitStmt(S);
S->setLeaveLoc(readSourceLocation());
2241}

2243void ASTStmtReader::VisitSEHExceptStmt(SEHExceptStmt *S) {
VisitStmt(S);
S->Loc = readSourceLocation();
S->Children[SEHExceptStmt::FILTER_EXPR] = Record.readSubStmt();
S->Children[SEHExceptStmt::BLOCK] = Record.readSubStmt();
2248}

2250void ASTStmtReader::VisitSEHFinallyStmt(SEHFinallyStmt *S) {
VisitStmt(S);
S->Loc = readSourceLocation();
S->Block = Record.readSubStmt();
2254}

2256void ASTStmtReader::VisitSEHTryStmt(SEHTryStmt *S) {
VisitStmt(S);
S->IsCXXTry = Record.readInt();
S->TryLoc = readSourceLocation();
S->Children[SEHTryStmt::TRY] = Record.readSubStmt();
S->Children[SEHTryStmt::HANDLER] = Record.readSubStmt();
2262}

2264//===----------------------------------------------------------------------===//
2265// CUDA Expressions and Statements
2266//===----------------------------------------------------------------------===//

2268void ASTStmtReader::VisitCUDAKernelCallExpr(CUDAKernelCallExpr *E) {
VisitCallExpr(E);
E->setPreArg(CUDAKernelCallExpr::CONFIG, Record.readSubExpr());
2271}

2273//===----------------------------------------------------------------------===//
2274// OpenCL Expressions and Statements.
2275//===----------------------------------------------------------------------===//
2276void ASTStmtReader::VisitAsTypeExpr(AsTypeExpr *E) {
VisitExpr(E);
E->BuiltinLoc = readSourceLocation();
E->RParenLoc = readSourceLocation();
E->SrcExpr = Record.readSubExpr();
2281}

2283//===----------------------------------------------------------------------===//
2284// OpenMP Directives.
2285//===----------------------------------------------------------------------===//

2287void ASTStmtReader::VisitOMPCanonicalLoop(OMPCanonicalLoop *S) {
VisitStmt(S);
for (Stmt *&SubStmt : S->SubStmts)
  SubStmt = Record.readSubStmt();
2291}

2293void ASTStmtReader::VisitOMPExecutableDirective(OMPExecutableDirective *E) {
Record.readOMPChildren(E->Data);
E->setLocStart(readSourceLocation());
E->setLocEnd(readSourceLocation());
2297}

2299void ASTStmtReader::VisitOMPLoopBasedDirective(OMPLoopBasedDirective *D) {
VisitStmt(D);
// Field CollapsedNum was read in ReadStmtFromStream.
Record.skipInts(1);
VisitOMPExecutableDirective(D);
2304}

2306void ASTStmtReader::VisitOMPLoopDirective(OMPLoopDirective *D) {
VisitOMPLoopBasedDirective(D);
2308}

2310void ASTStmtReader::VisitOMPParallelDirective(OMPParallelDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
D->setHasCancel(Record.readBool());
2314}

2316void ASTStmtReader::VisitOMPSimdDirective(OMPSimdDirective *D) {
VisitOMPLoopDirective(D);
2318}

2320void ASTStmtReader::VisitOMPTileDirective(OMPTileDirective *D) {
VisitOMPLoopBasedDirective(D);
2322}

2324void ASTStmtReader::VisitOMPUnrollDirective(OMPUnrollDirective *D) {
VisitOMPLoopBasedDirective(D);
2326}

2328void ASTStmtReader::VisitOMPForDirective(OMPForDirective *D) {
VisitOMPLoopDirective(D);
D->setHasCancel(Record.readBool());
2331}

2333void ASTStmtReader::VisitOMPForSimdDirective(OMPForSimdDirective *D) {
VisitOMPLoopDirective(D);
2335}

2337void ASTStmtReader::VisitOMPSectionsDirective(OMPSectionsDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
D->setHasCancel(Record.readBool());
2341}

2343void ASTStmtReader::VisitOMPSectionDirective(OMPSectionDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
D->setHasCancel(Record.readBool());
2347}

2349void ASTStmtReader::VisitOMPSingleDirective(OMPSingleDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
2352}

2354void ASTStmtReader::VisitOMPMasterDirective(OMPMasterDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
2357}

2359void ASTStmtReader::VisitOMPCriticalDirective(OMPCriticalDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
D->DirName = Record.readDeclarationNameInfo();
2363}

2365void ASTStmtReader::VisitOMPParallelForDirective(OMPParallelForDirective *D) {
VisitOMPLoopDirective(D);
D->setHasCancel(Record.readBool());
2368}

2370void ASTStmtReader::VisitOMPParallelForSimdDirective(
  OMPParallelForSimdDirective *D) {
VisitOMPLoopDirective(D);
2373}

2375void ASTStmtReader::VisitOMPParallelMasterDirective(
  OMPParallelMasterDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
2379}

2381void ASTStmtReader::VisitOMPParallelSectionsDirective(
  OMPParallelSectionsDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
D->setHasCancel(Record.readBool());
2386}

2388void ASTStmtReader::VisitOMPTaskDirective(OMPTaskDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
D->setHasCancel(Record.readBool());
2392}

2394void ASTStmtReader::VisitOMPTaskyieldDirective(OMPTaskyieldDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
2397}

2399void ASTStmtReader::VisitOMPBarrierDirective(OMPBarrierDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
2402}

2404void ASTStmtReader::VisitOMPTaskwaitDirective(OMPTaskwaitDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
2407}

2409void ASTStmtReader::VisitOMPTaskgroupDirective(OMPTaskgroupDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
2412}

2414void ASTStmtReader::VisitOMPFlushDirective(OMPFlushDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
2417}

2419void ASTStmtReader::VisitOMPDepobjDirective(OMPDepobjDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
2422}

2424void ASTStmtReader::VisitOMPScanDirective(OMPScanDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
2427}

2429void ASTStmtReader::VisitOMPOrderedDirective(OMPOrderedDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
2432}

2434void ASTStmtReader::VisitOMPAtomicDirective(OMPAtomicDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
D->IsXLHSInRHSPart = Record.readBool();
D->IsPostfixUpdate = Record.readBool();
2439}

2441void ASTStmtReader::VisitOMPTargetDirective(OMPTargetDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
2444}

2446void ASTStmtReader::VisitOMPTargetDataDirective(OMPTargetDataDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
2449}

2451void ASTStmtReader::VisitOMPTargetEnterDataDirective(
  OMPTargetEnterDataDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
2455}

2457void ASTStmtReader::VisitOMPTargetExitDataDirective(
  OMPTargetExitDataDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
2461}

2463void ASTStmtReader::VisitOMPTargetParallelDirective(
  OMPTargetParallelDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
D->setHasCancel(Record.readBool());
2468}

2470void ASTStmtReader::VisitOMPTargetParallelForDirective(
  OMPTargetParallelForDirective *D) {
VisitOMPLoopDirective(D);
D->setHasCancel(Record.readBool());
2474}

2476void ASTStmtReader::VisitOMPTeamsDirective(OMPTeamsDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
2479}

2481void ASTStmtReader::VisitOMPCancellationPointDirective(
  OMPCancellationPointDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
D->setCancelRegion(Record.readEnum<OpenMPDirectiveKind>());
2486}

2488void ASTStmtReader::VisitOMPCancelDirective(OMPCancelDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
D->setCancelRegion(Record.readEnum<OpenMPDirectiveKind>());
2492}

2494void ASTStmtReader::VisitOMPTaskLoopDirective(OMPTaskLoopDirective *D) {
VisitOMPLoopDirective(D);
D->setHasCancel(Record.readBool());
2497}

2499void ASTStmtReader::VisitOMPTaskLoopSimdDirective(OMPTaskLoopSimdDirective *D) {
VisitOMPLoopDirective(D);
2501}

2503void ASTStmtReader::VisitOMPMasterTaskLoopDirective(
  OMPMasterTaskLoopDirective *D) {
VisitOMPLoopDirective(D);
D->setHasCancel(Record.readBool());
2507}

2509void ASTStmtReader::VisitOMPMasterTaskLoopSimdDirective(
  OMPMasterTaskLoopSimdDirective *D) {
VisitOMPLoopDirective(D);
2512}

2514void ASTStmtReader::VisitOMPParallelMasterTaskLoopDirective(
  OMPParallelMasterTaskLoopDirective *D) {
VisitOMPLoopDirective(D);
D->setHasCancel(Record.readBool());
2518}

2520void ASTStmtReader::VisitOMPParallelMasterTaskLoopSimdDirective(
  OMPParallelMasterTaskLoopSimdDirective *D) {
VisitOMPLoopDirective(D);
2523}

2525void ASTStmtReader::VisitOMPDistributeDirective(OMPDistributeDirective *D) {
VisitOMPLoopDirective(D);
2527}

2529void ASTStmtReader::VisitOMPTargetUpdateDirective(OMPTargetUpdateDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
2532}

2534void ASTStmtReader::VisitOMPDistributeParallelForDirective(
  OMPDistributeParallelForDirective *D) {
VisitOMPLoopDirective(D);
D->setHasCancel(Record.readBool());
2538}

2540void ASTStmtReader::VisitOMPDistributeParallelForSimdDirective(
  OMPDistributeParallelForSimdDirective *D) {
VisitOMPLoopDirective(D);
2543}

2545void ASTStmtReader::VisitOMPDistributeSimdDirective(
  OMPDistributeSimdDirective *D) {
VisitOMPLoopDirective(D);
2548}

2550void ASTStmtReader::VisitOMPTargetParallelForSimdDirective(
  OMPTargetParallelForSimdDirective *D) {
VisitOMPLoopDirective(D);
2553}

2555void ASTStmtReader::VisitOMPTargetSimdDirective(OMPTargetSimdDirective *D) {
VisitOMPLoopDirective(D);
2557}

2559void ASTStmtReader::VisitOMPTeamsDistributeDirective(
  OMPTeamsDistributeDirective *D) {
VisitOMPLoopDirective(D);
2562}

2564void ASTStmtReader::VisitOMPTeamsDistributeSimdDirective(
  OMPTeamsDistributeSimdDirective *D) {
VisitOMPLoopDirective(D);
2567}

2569void ASTStmtReader::VisitOMPTeamsDistributeParallelForSimdDirective(
  OMPTeamsDistributeParallelForSimdDirective *D) {
VisitOMPLoopDirective(D);
2572}

2574void ASTStmtReader::VisitOMPTeamsDistributeParallelForDirective(
  OMPTeamsDistributeParallelForDirective *D) {
VisitOMPLoopDirective(D);
D->setHasCancel(Record.readBool());
2578}

2580void ASTStmtReader::VisitOMPTargetTeamsDirective(OMPTargetTeamsDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
2583}

2585void ASTStmtReader::VisitOMPTargetTeamsDistributeDirective(
  OMPTargetTeamsDistributeDirective *D) {
VisitOMPLoopDirective(D);
2588}

2590void ASTStmtReader::VisitOMPTargetTeamsDistributeParallelForDirective(
  OMPTargetTeamsDistributeParallelForDirective *D) {
VisitOMPLoopDirective(D);
D->setHasCancel(Record.readBool());
2594}

2596void ASTStmtReader::VisitOMPTargetTeamsDistributeParallelForSimdDirective(
  OMPTargetTeamsDistributeParallelForSimdDirective *D) {
VisitOMPLoopDirective(D);
2599}

2601void ASTStmtReader::VisitOMPTargetTeamsDistributeSimdDirective(
  OMPTargetTeamsDistributeSimdDirective *D) {
VisitOMPLoopDirective(D);
2604}

2606void ASTStmtReader::VisitOMPInteropDirective(OMPInteropDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
2609}

2611void ASTStmtReader::VisitOMPDispatchDirective(OMPDispatchDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
D->setTargetCallLoc(Record.readSourceLocation());
2615}

2617void ASTStmtReader::VisitOMPMaskedDirective(OMPMaskedDirective *D) {
VisitStmt(D);
VisitOMPExecutableDirective(D);
2620}

2622//===----------------------------------------------------------------------===//
2623// ASTReader Implementation
2624//===----------------------------------------------------------------------===//

2626Stmt *ASTReader::ReadStmt(ModuleFile &F) {
switch (ReadingKind) {
case Read_None:
  llvm_unreachable("should not call this when not reading anything")__builtin_unreachable();
case Read_Decl:
case Read_Type:
  return ReadStmtFromStream(F);
case Read_Stmt:
  return ReadSubStmt();
}

llvm_unreachable("ReadingKind not set ?")__builtin_unreachable();
2638}

2640Expr *ASTReader::ReadExpr(ModuleFile &F) {
return cast_or_null<Expr>(ReadStmt(F));
2642}

2644Expr *ASTReader::ReadSubExpr() {
return cast_or_null<Expr>(ReadSubStmt());
2646}

2648// Within the bitstream, expressions are stored in Reverse Polish
2649// Notation, with each of the subexpressions preceding the
2650// expression they are stored in. Subexpressions are stored from last to first.
2651// To evaluate expressions, we continue reading expressions and placing them on
2652// the stack, with expressions having operands removing those operands from the
2653// stack. Evaluation terminates when we see a STMT_STOP record, and
2654// the single remaining expression on the stack is our result.
2655Stmt *ASTReader::ReadStmtFromStream(ModuleFile &F) {
ReadingKindTracker ReadingKind(Read_Stmt, *this);
llvm::BitstreamCursor &Cursor = F.DeclsCursor;

// Map of offset to previously deserialized stmt. The offset points
// just after the stmt record.
llvm::DenseMap<uint64_t, Stmt *> StmtEntries;

2663#ifndef NDEBUG1
unsigned PrevNumStmts = StmtStack.size();
2665#endif

ASTRecordReader Record(*this, F);
ASTStmtReader Reader(Record, Cursor);
Stmt::EmptyShell Empty;

while (true) {
1
Loop condition is true.  Entering loop body→
  llvm::Expected<llvm::BitstreamEntry> MaybeEntry =
      Cursor.advanceSkippingSubblocks();
2
←
Calling 'BitstreamCursor::advanceSkippingSubblocks'→
  if (!MaybeEntry) {
    Error(toString(MaybeEntry.takeError()));
    return nullptr;
  }
  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 nullptr;
  case llvm::BitstreamEntry::EndBlock:
    goto Done;
  case llvm::BitstreamEntry::Record:
    // The interesting case.
    break;
  }

  ASTContext &Context = getContext();
  Stmt *S = nullptr;
  bool Finished = false;
  bool IsStmtReference = false;
  Expected<unsigned> MaybeStmtCode = Record.readRecord(Cursor, Entry.ID);
  if (!MaybeStmtCode) {
    Error(toString(MaybeStmtCode.takeError()));
    return nullptr;
  }
  switch ((StmtCode)MaybeStmtCode.get()) {
  case STMT_STOP:
    Finished = true;
    break;

  case STMT_REF_PTR:
    IsStmtReference = true;
    assert(StmtEntries.find(Record[0]) != StmtEntries.end() &&((void)0)
           "No stmt was recorded for this offset reference!")((void)0);
    S = StmtEntries[Record.readInt()];
    break;

  case STMT_NULL_PTR:
    S = nullptr;
    break;

  case STMT_NULL:
    S = new (Context) NullStmt(Empty);
    break;

  case STMT_COMPOUND:
    S = CompoundStmt::CreateEmpty(
        Context, /*NumStmts=*/Record[ASTStmtReader::NumStmtFields]);
    break;

  case STMT_CASE:
    S = CaseStmt::CreateEmpty(
        Context,
        /*CaseStmtIsGNURange*/ Record[ASTStmtReader::NumStmtFields + 3]);
    break;

  case STMT_DEFAULT:
    S = new (Context) DefaultStmt(Empty);
    break;

  case STMT_LABEL:
    S = new (Context) LabelStmt(Empty);
    break;

  case STMT_ATTRIBUTED:
    S = AttributedStmt::CreateEmpty(
      Context,
      /*NumAttrs*/Record[ASTStmtReader::NumStmtFields]);
    break;

  case STMT_IF:
    S = IfStmt::CreateEmpty(
        Context,
        /* HasElse=*/Record[ASTStmtReader::NumStmtFields + 1],
        /* HasVar=*/Record[ASTStmtReader::NumStmtFields + 2],
        /* HasInit=*/Record[ASTStmtReader::NumStmtFields + 3]);
    break;

  case STMT_SWITCH:
    S = SwitchStmt::CreateEmpty(
        Context,
        /* HasInit=*/Record[ASTStmtReader::NumStmtFields],
        /* HasVar=*/Record[ASTStmtReader::NumStmtFields + 1]);
    break;

  case STMT_WHILE:
    S = WhileStmt::CreateEmpty(
        Context,
        /* HasVar=*/Record[ASTStmtReader::NumStmtFields]);
    break;

  case STMT_DO:
    S = new (Context) DoStmt(Empty);
    break;

  case STMT_FOR:
    S = new (Context) ForStmt(Empty);
    break;

  case STMT_GOTO:
    S = new (Context) GotoStmt(Empty);
    break;

  case STMT_INDIRECT_GOTO:
    S = new (Context) IndirectGotoStmt(Empty);
    break;

  case STMT_CONTINUE:
    S = new (Context) ContinueStmt(Empty);
    break;

  case STMT_BREAK:
    S = new (Context) BreakStmt(Empty);
    break;

  case STMT_RETURN:
    S = ReturnStmt::CreateEmpty(
        Context, /* HasNRVOCandidate=*/Record[ASTStmtReader::NumStmtFields]);
    break;

  case STMT_DECL:
    S = new (Context) DeclStmt(Empty);
    break;

  case STMT_GCCASM:
    S = new (Context) GCCAsmStmt(Empty);
    break;

  case STMT_MSASM:
    S = new (Context) MSAsmStmt(Empty);
    break;

  case STMT_CAPTURED:
    S = CapturedStmt::CreateDeserialized(
        Context, Record[ASTStmtReader::NumStmtFields]);
    break;

  case EXPR_CONSTANT:
    S = ConstantExpr::CreateEmpty(
        Context, static_cast<ConstantExpr::ResultStorageKind>(
                     /*StorageKind=*/Record[ASTStmtReader::NumExprFields]));
    break;

  case EXPR_SYCL_UNIQUE_STABLE_NAME:
    S = SYCLUniqueStableNameExpr::CreateEmpty(Context);
    break;

  case EXPR_PREDEFINED:
    S = PredefinedExpr::CreateEmpty(
        Context,
        /*HasFunctionName*/ Record[ASTStmtReader::NumExprFields]);
    break;

  case EXPR_DECL_REF:
    S = DeclRefExpr::CreateEmpty(
      Context,
      /*HasQualifier=*/Record[ASTStmtReader::NumExprFields],
      /*HasFoundDecl=*/Record[ASTStmtReader::NumExprFields + 1],
      /*HasTemplateKWAndArgsInfo=*/Record[ASTStmtReader::NumExprFields + 2],
      /*NumTemplateArgs=*/Record[ASTStmtReader::NumExprFields + 2] ?
        Record[ASTStmtReader::NumExprFields + 6] : 0);
    break;

  case EXPR_INTEGER_LITERAL:
    S = IntegerLiteral::Create(Context, Empty);
    break;

  case EXPR_FIXEDPOINT_LITERAL:
    S = FixedPointLiteral::Create(Context, Empty);
    break;

  case EXPR_FLOATING_LITERAL:
    S = FloatingLiteral::Create(Context, Empty);
    break;

  case EXPR_IMAGINARY_LITERAL:
    S = new (Context) ImaginaryLiteral(Empty);
    break;

  case EXPR_STRING_LITERAL:
    S = StringLiteral::CreateEmpty(
        Context,
        /* NumConcatenated=*/Record[ASTStmtReader::NumExprFields],
        /* Length=*/Record[ASTStmtReader::NumExprFields + 1],
        /* CharByteWidth=*/Record[ASTStmtReader::NumExprFields + 2]);
    break;

  case EXPR_CHARACTER_LITERAL:
    S = new (Context) CharacterLiteral(Empty);
    break;

  case EXPR_PAREN:
    S = new (Context) ParenExpr(Empty);
    break;

  case EXPR_PAREN_LIST:
    S = ParenListExpr::CreateEmpty(
        Context,
        /* NumExprs=*/Record[ASTStmtReader::NumExprFields]);
    break;

  case EXPR_UNARY_OPERATOR:
    S = UnaryOperator::CreateEmpty(Context,
                                   Record[ASTStmtReader::NumExprFields]);
    break;

  case EXPR_OFFSETOF:
    S = OffsetOfExpr::CreateEmpty(Context,
                                  Record[ASTStmtReader::NumExprFields],
                                  Record[ASTStmtReader::NumExprFields + 1]);
    break;

  case EXPR_SIZEOF_ALIGN_OF:
    S = new (Context) UnaryExprOrTypeTraitExpr(Empty);
    break;

  case EXPR_ARRAY_SUBSCRIPT:
    S = new (Context) ArraySubscriptExpr(Empty);
    break;

  case EXPR_MATRIX_SUBSCRIPT:
    S = new (Context) MatrixSubscriptExpr(Empty);
    break;

  case EXPR_OMP_ARRAY_SECTION:
    S = new (Context) OMPArraySectionExpr(Empty);
    break;

  case EXPR_OMP_ARRAY_SHAPING:
    S = OMPArrayShapingExpr::CreateEmpty(
        Context, Record[ASTStmtReader::NumExprFields]);
    break;

  case EXPR_OMP_ITERATOR:
    S = OMPIteratorExpr::CreateEmpty(Context,
                                     Record[ASTStmtReader::NumExprFields]);
    break;

  case EXPR_CALL:
    S = CallExpr::CreateEmpty(
        Context, /*NumArgs=*/Record[ASTStmtReader::NumExprFields],
        /*HasFPFeatures=*/Record[ASTStmtReader::NumExprFields + 1], Empty);
    break;

  case EXPR_RECOVERY:
    S = RecoveryExpr::CreateEmpty(
        Context, /*NumArgs=*/Record[ASTStmtReader::NumExprFields]);
    break;

  case EXPR_MEMBER:
    S = MemberExpr::CreateEmpty(Context, Record[ASTStmtReader::NumExprFields],
                                Record[ASTStmtReader::NumExprFields + 1],
                                Record[ASTStmtReader::NumExprFields + 2],
                                Record[ASTStmtReader::NumExprFields + 3]);
    break;

  case EXPR_BINARY_OPERATOR:
    S = BinaryOperator::CreateEmpty(Context,
                                    Record[ASTStmtReader::NumExprFields]);
    break;

  case EXPR_COMPOUND_ASSIGN_OPERATOR:
    S = CompoundAssignOperator::CreateEmpty(
        Context, Record[ASTStmtReader::NumExprFields]);
    break;

  case EXPR_CONDITIONAL_OPERATOR:
    S = new (Context) ConditionalOperator(Empty);
    break;

  case EXPR_BINARY_CONDITIONAL_OPERATOR:
    S = new (Context) BinaryConditionalOperator(Empty);
    break;

  case EXPR_IMPLICIT_CAST:
    S = ImplicitCastExpr::CreateEmpty(
        Context,
        /*PathSize*/ Record[ASTStmtReader::NumExprFields],
        /*HasFPFeatures*/ Record[ASTStmtReader::NumExprFields + 1]);
    break;

  case EXPR_CSTYLE_CAST:
    S = CStyleCastExpr::CreateEmpty(
        Context,
        /*PathSize*/ Record[ASTStmtReader::NumExprFields],
        /*HasFPFeatures*/ Record[ASTStmtReader::NumExprFields + 1]);
    break;

  case EXPR_COMPOUND_LITERAL:
    S = new (Context) CompoundLiteralExpr(Empty);
    break;

  case EXPR_EXT_VECTOR_ELEMENT:
    S = new (Context) ExtVectorElementExpr(Empty);
    break;

  case EXPR_INIT_LIST:
    S = new (Context) InitListExpr(Empty);
    break;

  case EXPR_DESIGNATED_INIT:
    S = DesignatedInitExpr::CreateEmpty(Context,
                                   Record[ASTStmtReader::NumExprFields] - 1);

    break;

  case EXPR_DESIGNATED_INIT_UPDATE:
    S = new (Context) DesignatedInitUpdateExpr(Empty);
    break;

  case EXPR_IMPLICIT_VALUE_INIT:
    S = new (Context) ImplicitValueInitExpr(Empty);
    break;

  case EXPR_NO_INIT:
    S = new (Context) NoInitExpr(Empty);
    break;

  case EXPR_ARRAY_INIT_LOOP:
    S = new (Context) ArrayInitLoopExpr(Empty);
    break;

  case EXPR_ARRAY_INIT_INDEX:
    S = new (Context) ArrayInitIndexExpr(Empty);
    break;

  case EXPR_VA_ARG:
    S = new (Context) VAArgExpr(Empty);
    break;

  case EXPR_SOURCE_LOC:
    S = new (Context) SourceLocExpr(Empty);
    break;

  case EXPR_ADDR_LABEL:
    S = new (Context) AddrLabelExpr(Empty);
    break;

  case EXPR_STMT:
    S = new (Context) StmtExpr(Empty);
    break;

  case EXPR_CHOOSE:
    S = new (Context) ChooseExpr(Empty);
    break;

  case EXPR_GNU_NULL:
    S = new (Context) GNUNullExpr(Empty);
    break;

  case EXPR_SHUFFLE_VECTOR:
    S = new (Context) ShuffleVectorExpr(Empty);
    break;

  case EXPR_CONVERT_VECTOR:
    S = new (Context) ConvertVectorExpr(Empty);
    break;

  case EXPR_BLOCK:
    S = new (Context) BlockExpr(Empty);
    break;

  case EXPR_GENERIC_SELECTION:
    S = GenericSelectionExpr::CreateEmpty(
        Context,
        /*NumAssocs=*/Record[ASTStmtReader::NumExprFields]);
    break;

  case EXPR_OBJC_STRING_LITERAL:
    S = new (Context) ObjCStringLiteral(Empty);
    break;

  case EXPR_OBJC_BOXED_EXPRESSION:
    S = new (Context) ObjCBoxedExpr(Empty);
    break;

  case EXPR_OBJC_ARRAY_LITERAL:
    S = ObjCArrayLiteral::CreateEmpty(Context,
                                      Record[ASTStmtReader::NumExprFields]);
    break;

  case EXPR_OBJC_DICTIONARY_LITERAL:
    S = ObjCDictionaryLiteral::CreateEmpty(Context,
          Record[ASTStmtReader::NumExprFields],
          Record[ASTStmtReader::NumExprFields + 1]);
    break;

  case EXPR_OBJC_ENCODE:
    S = new (Context) ObjCEncodeExpr(Empty);
    break;

  case EXPR_OBJC_SELECTOR_EXPR:
    S = new (Context) ObjCSelectorExpr(Empty);
    break;

  case EXPR_OBJC_PROTOCOL_EXPR:
    S = new (Context) ObjCProtocolExpr(Empty);
    break;

  case EXPR_OBJC_IVAR_REF_EXPR:
    S = new (Context) ObjCIvarRefExpr(Empty);
    break;

  case EXPR_OBJC_PROPERTY_REF_EXPR:
    S = new (Context) ObjCPropertyRefExpr(Empty);
    break;

  case EXPR_OBJC_SUBSCRIPT_REF_EXPR:
    S = new (Context) ObjCSubscriptRefExpr(Empty);
    break;

  case EXPR_OBJC_KVC_REF_EXPR:
    llvm_unreachable("mismatching AST file")__builtin_unreachable();

  case EXPR_OBJC_MESSAGE_EXPR:
    S = ObjCMessageExpr::CreateEmpty(Context,
                                   Record[ASTStmtReader::NumExprFields],
                                   Record[ASTStmtReader::NumExprFields + 1]);
    break;

  case EXPR_OBJC_ISA:
    S = new (Context) ObjCIsaExpr(Empty);
    break;

  case EXPR_OBJC_INDIRECT_COPY_RESTORE:
    S = new (Context) ObjCIndirectCopyRestoreExpr(Empty);
    break;

  case EXPR_OBJC_BRIDGED_CAST:
    S = new (Context) ObjCBridgedCastExpr(Empty);
    break;

  case STMT_OBJC_FOR_COLLECTION:
    S = new (Context) ObjCForCollectionStmt(Empty);
    break;

  case STMT_OBJC_CATCH:
    S = new (Context) ObjCAtCatchStmt(Empty);
    break;

  case STMT_OBJC_FINALLY:
    S = new (Context) ObjCAtFinallyStmt(Empty);
    break;

  case STMT_OBJC_AT_TRY:
    S = ObjCAtTryStmt::CreateEmpty(Context,
                                   Record[ASTStmtReader::NumStmtFields],
                                   Record[ASTStmtReader::NumStmtFields + 1]);
    break;

  case STMT_OBJC_AT_SYNCHRONIZED:
    S = new (Context) ObjCAtSynchronizedStmt(Empty);
    break;

  case STMT_OBJC_AT_THROW:
    S = new (Context) ObjCAtThrowStmt(Empty);
    break;

  case STMT_OBJC_AUTORELEASE_POOL:
    S = new (Context) ObjCAutoreleasePoolStmt(Empty);
    break;

  case EXPR_OBJC_BOOL_LITERAL:
    S = new (Context) ObjCBoolLiteralExpr(Empty);
    break;

  case EXPR_OBJC_AVAILABILITY_CHECK:
    S = new (Context) ObjCAvailabilityCheckExpr(Empty);
    break;

  case STMT_SEH_LEAVE:
    S = new (Context) SEHLeaveStmt(Empty);
    break;

  case STMT_SEH_EXCEPT:
    S = new (Context) SEHExceptStmt(Empty);
    break;

  case STMT_SEH_FINALLY:
    S = new (Context) SEHFinallyStmt(Empty);
    break;

  case STMT_SEH_TRY:
    S = new (Context) SEHTryStmt(Empty);
    break;

  case STMT_CXX_CATCH:
    S = new (Context) CXXCatchStmt(Empty);
    break;

  case STMT_CXX_TRY:
    S = CXXTryStmt::Create(Context, Empty,
           /*numHandlers=*/Record[ASTStmtReader::NumStmtFields]);
    break;

  case STMT_CXX_FOR_RANGE:
    S = new (Context) CXXForRangeStmt(Empty);
    break;

  case STMT_MS_DEPENDENT_EXISTS:
    S = new (Context) MSDependentExistsStmt(SourceLocation(), true,
                                            NestedNameSpecifierLoc(),
                                            DeclarationNameInfo(),
                                            nullptr);
    break;

  case STMT_OMP_CANONICAL_LOOP:
    S = OMPCanonicalLoop::createEmpty(Context);
    break;

  case STMT_OMP_PARALLEL_DIRECTIVE:
    S =
      OMPParallelDirective::CreateEmpty(Context,
                                        Record[ASTStmtReader::NumStmtFields],
                                        Empty);
    break;

  case STMT_OMP_SIMD_DIRECTIVE: {
    unsigned CollapsedNum = Record[ASTStmtReader::NumStmtFields];
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
    S = OMPSimdDirective::CreateEmpty(Context, NumClauses,
                                      CollapsedNum, Empty);
    break;
  }

  case STMT_OMP_TILE_DIRECTIVE: {
    unsigned NumLoops = Record[ASTStmtReader::NumStmtFields];
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
    S = OMPTileDirective::CreateEmpty(Context, NumClauses, NumLoops);
    break;
  }

  case STMT_OMP_UNROLL_DIRECTIVE: {
    assert(Record[ASTStmtReader::NumStmtFields] == 1 && "Unroll directive accepts only a single loop")((void)0);
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
    S = OMPUnrollDirective::CreateEmpty(Context, NumClauses);
    break;
  }

  case STMT_OMP_FOR_DIRECTIVE: {
    unsigned CollapsedNum = Record[ASTStmtReader::NumStmtFields];
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
    S = OMPForDirective::CreateEmpty(Context, NumClauses, CollapsedNum,
                                     Empty);
    break;
  }

  case STMT_OMP_FOR_SIMD_DIRECTIVE: {
    unsigned CollapsedNum = Record[ASTStmtReader::NumStmtFields];
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
    S = OMPForSimdDirective::CreateEmpty(Context, NumClauses, CollapsedNum,
                                         Empty);
    break;
  }

  case STMT_OMP_SECTIONS_DIRECTIVE:
    S = OMPSectionsDirective::CreateEmpty(
        Context, Record[ASTStmtReader::NumStmtFields], Empty);
    break;

  case STMT_OMP_SECTION_DIRECTIVE:
    S = OMPSectionDirective::CreateEmpty(Context, Empty);
    break;

  case STMT_OMP_SINGLE_DIRECTIVE:
    S = OMPSingleDirective::CreateEmpty(
        Context, Record[ASTStmtReader::NumStmtFields], Empty);
    break;

  case STMT_OMP_MASTER_DIRECTIVE:
    S = OMPMasterDirective::CreateEmpty(Context, Empty);
    break;

  case STMT_OMP_CRITICAL_DIRECTIVE:
    S = OMPCriticalDirective::CreateEmpty(
        Context, Record[ASTStmtReader::NumStmtFields], Empty);
    break;

  case STMT_OMP_PARALLEL_FOR_DIRECTIVE: {
    unsigned CollapsedNum = Record[ASTStmtReader::NumStmtFields];
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
    S = OMPParallelForDirective::CreateEmpty(Context, NumClauses,
                                             CollapsedNum, Empty);
    break;
  }

  case STMT_OMP_PARALLEL_FOR_SIMD_DIRECTIVE: {
    unsigned CollapsedNum = Record[ASTStmtReader::NumStmtFields];
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
    S = OMPParallelForSimdDirective::CreateEmpty(Context, NumClauses,
                                                 CollapsedNum, Empty);
    break;
  }

  case STMT_OMP_PARALLEL_MASTER_DIRECTIVE:
    S = OMPParallelMasterDirective::CreateEmpty(
        Context, Record[ASTStmtReader::NumStmtFields], Empty);
    break;

  case STMT_OMP_PARALLEL_SECTIONS_DIRECTIVE:
    S = OMPParallelSectionsDirective::CreateEmpty(
        Context, Record[ASTStmtReader::NumStmtFields], Empty);
    break;

  case STMT_OMP_TASK_DIRECTIVE:
    S = OMPTaskDirective::CreateEmpty(
        Context, Record[ASTStmtReader::NumStmtFields], Empty);
    break;

  case STMT_OMP_TASKYIELD_DIRECTIVE:
    S = OMPTaskyieldDirective::CreateEmpty(Context, Empty);
    break;

  case STMT_OMP_BARRIER_DIRECTIVE:
    S = OMPBarrierDirective::CreateEmpty(Context, Empty);
    break;

  case STMT_OMP_TASKWAIT_DIRECTIVE:
    S = OMPTaskwaitDirective::CreateEmpty(Context, Empty);
    break;

  case STMT_OMP_TASKGROUP_DIRECTIVE:
    S = OMPTaskgroupDirective::CreateEmpty(
        Context, Record[ASTStmtReader::NumStmtFields], Empty);
    break;

  case STMT_OMP_FLUSH_DIRECTIVE:
    S = OMPFlushDirective::CreateEmpty(
        Context, Record[ASTStmtReader::NumStmtFields], Empty);
    break;

  case STMT_OMP_DEPOBJ_DIRECTIVE:
    S = OMPDepobjDirective::CreateEmpty(
        Context, Record[ASTStmtReader::NumStmtFields], Empty);
    break;

  case STMT_OMP_SCAN_DIRECTIVE:
    S = OMPScanDirective::CreateEmpty(
        Context, Record[ASTStmtReader::NumStmtFields], Empty);
    break;

  case STMT_OMP_ORDERED_DIRECTIVE: {
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields];
    bool HasAssociatedStmt = Record[ASTStmtReader::NumStmtFields + 2];
    S = OMPOrderedDirective::CreateEmpty(Context, NumClauses,
                                         !HasAssociatedStmt, Empty);
    break;
  }

  case STMT_OMP_ATOMIC_DIRECTIVE:
    S = OMPAtomicDirective::CreateEmpty(
        Context, Record[ASTStmtReader::NumStmtFields], Empty);
    break;

  case STMT_OMP_TARGET_DIRECTIVE:
    S = OMPTargetDirective::CreateEmpty(
        Context, Record[ASTStmtReader::NumStmtFields], Empty);
    break;

  case STMT_OMP_TARGET_DATA_DIRECTIVE:
    S = OMPTargetDataDirective::CreateEmpty(
        Context, Record[ASTStmtReader::NumStmtFields], Empty);
    break;

  case STMT_OMP_TARGET_ENTER_DATA_DIRECTIVE:
    S = OMPTargetEnterDataDirective::CreateEmpty(
        Context, Record[ASTStmtReader::NumStmtFields], Empty);
    break;

  case STMT_OMP_TARGET_EXIT_DATA_DIRECTIVE:
    S = OMPTargetExitDataDirective::CreateEmpty(
        Context, Record[ASTStmtReader::NumStmtFields], Empty);
    break;

  case STMT_OMP_TARGET_PARALLEL_DIRECTIVE:
    S = OMPTargetParallelDirective::CreateEmpty(
        Context, Record[ASTStmtReader::NumStmtFields], Empty);
    break;

  case STMT_OMP_TARGET_PARALLEL_FOR_DIRECTIVE: {
    unsigned CollapsedNum = Record[ASTStmtReader::NumStmtFields];
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
    S = OMPTargetParallelForDirective::CreateEmpty(Context, NumClauses,
                                                   CollapsedNum, Empty);
    break;
  }

  case STMT_OMP_TARGET_UPDATE_DIRECTIVE:
    S = OMPTargetUpdateDirective::CreateEmpty(
        Context, Record[ASTStmtReader::NumStmtFields], Empty);
    break;

  case STMT_OMP_TEAMS_DIRECTIVE:
    S = OMPTeamsDirective::CreateEmpty(
        Context, Record[ASTStmtReader::NumStmtFields], Empty);
    break;

  case STMT_OMP_CANCELLATION_POINT_DIRECTIVE:
    S = OMPCancellationPointDirective::CreateEmpty(Context, Empty);
    break;

  case STMT_OMP_CANCEL_DIRECTIVE:
    S = OMPCancelDirective::CreateEmpty(
        Context, Record[ASTStmtReader::NumStmtFields], Empty);
    break;

  case STMT_OMP_TASKLOOP_DIRECTIVE: {
    unsigned CollapsedNum = Record[ASTStmtReader::NumStmtFields];
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
    S = OMPTaskLoopDirective::CreateEmpty(Context, NumClauses, CollapsedNum,
                                          Empty);
    break;
  }

  case STMT_OMP_TASKLOOP_SIMD_DIRECTIVE: {
    unsigned CollapsedNum = Record[ASTStmtReader::NumStmtFields];
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
    S = OMPTaskLoopSimdDirective::CreateEmpty(Context, NumClauses,
                                              CollapsedNum, Empty);
    break;
  }

  case STMT_OMP_MASTER_TASKLOOP_DIRECTIVE: {
    unsigned CollapsedNum = Record[ASTStmtReader::NumStmtFields];
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
    S = OMPMasterTaskLoopDirective::CreateEmpty(Context, NumClauses,
                                                CollapsedNum, Empty);
    break;
  }

  case STMT_OMP_MASTER_TASKLOOP_SIMD_DIRECTIVE: {
    unsigned CollapsedNum = Record[ASTStmtReader::NumStmtFields];
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
    S = OMPMasterTaskLoopSimdDirective::CreateEmpty(Context, NumClauses,
                                                    CollapsedNum, Empty);
    break;
  }

  case STMT_OMP_PARALLEL_MASTER_TASKLOOP_DIRECTIVE: {
    unsigned CollapsedNum = Record[ASTStmtReader::NumStmtFields];
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
    S = OMPParallelMasterTaskLoopDirective::CreateEmpty(Context, NumClauses,
                                                        CollapsedNum, Empty);
    break;
  }

  case STMT_OMP_PARALLEL_MASTER_TASKLOOP_SIMD_DIRECTIVE: {
    unsigned CollapsedNum = Record[ASTStmtReader::NumStmtFields];
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
    S = OMPParallelMasterTaskLoopSimdDirective::CreateEmpty(
        Context, NumClauses, CollapsedNum, Empty);
    break;
  }

  case STMT_OMP_DISTRIBUTE_DIRECTIVE: {
    unsigned CollapsedNum = Record[ASTStmtReader::NumStmtFields];
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
    S = OMPDistributeDirective::CreateEmpty(Context, NumClauses, CollapsedNum,
                                            Empty);
    break;
  }

  case STMT_OMP_DISTRIBUTE_PARALLEL_FOR_DIRECTIVE: {
    unsigned CollapsedNum = Record[ASTStmtReader::NumStmtFields];
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
    S = OMPDistributeParallelForDirective::CreateEmpty(Context, NumClauses,
                                                       CollapsedNum, Empty);
    break;
  }

  case STMT_OMP_DISTRIBUTE_PARALLEL_FOR_SIMD_DIRECTIVE: {
    unsigned CollapsedNum = Record[ASTStmtReader::NumStmtFields];
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
    S = OMPDistributeParallelForSimdDirective::CreateEmpty(Context, NumClauses,
                                                           CollapsedNum,
                                                           Empty);
    break;
  }

  case STMT_OMP_DISTRIBUTE_SIMD_DIRECTIVE: {
    unsigned CollapsedNum = Record[ASTStmtReader::NumStmtFields];
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
    S = OMPDistributeSimdDirective::CreateEmpty(Context, NumClauses,
                                                CollapsedNum, Empty);
    break;
  }

  case STMT_OMP_TARGET_PARALLEL_FOR_SIMD_DIRECTIVE: {
    unsigned CollapsedNum = Record[ASTStmtReader::NumStmtFields];
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
    S = OMPTargetParallelForSimdDirective::CreateEmpty(Context, NumClauses,
                                                       CollapsedNum, Empty);
    break;
  }

  case STMT_OMP_TARGET_SIMD_DIRECTIVE: {
    unsigned CollapsedNum = Record[ASTStmtReader::NumStmtFields];
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
    S = OMPTargetSimdDirective::CreateEmpty(Context, NumClauses, CollapsedNum,
                                            Empty);
    break;
  }

   case STMT_OMP_TEAMS_DISTRIBUTE_DIRECTIVE: {
     unsigned CollapsedNum = Record[ASTStmtReader::NumStmtFields];
     unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
     S = OMPTeamsDistributeDirective::CreateEmpty(Context, NumClauses,
                                                  CollapsedNum, Empty);
     break;
  }

  case STMT_OMP_TEAMS_DISTRIBUTE_SIMD_DIRECTIVE: {
    unsigned CollapsedNum = Record[ASTStmtReader::NumStmtFields];
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
    S = OMPTeamsDistributeSimdDirective::CreateEmpty(Context, NumClauses,
                                                     CollapsedNum, Empty);
    break;
  }

  case STMT_OMP_TEAMS_DISTRIBUTE_PARALLEL_FOR_SIMD_DIRECTIVE: {
    unsigned CollapsedNum = Record[ASTStmtReader::NumStmtFields];
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
    S = OMPTeamsDistributeParallelForSimdDirective::CreateEmpty(
        Context, NumClauses, CollapsedNum, Empty);
    break;
  }

  case STMT_OMP_TEAMS_DISTRIBUTE_PARALLEL_FOR_DIRECTIVE: {
    unsigned CollapsedNum = Record[ASTStmtReader::NumStmtFields];
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
    S = OMPTeamsDistributeParallelForDirective::CreateEmpty(
        Context, NumClauses, CollapsedNum, Empty);
    break;
  }

  case STMT_OMP_TARGET_TEAMS_DIRECTIVE:
    S = OMPTargetTeamsDirective::CreateEmpty(
        Context, Record[ASTStmtReader::NumStmtFields], Empty);
    break;

  case STMT_OMP_TARGET_TEAMS_DISTRIBUTE_DIRECTIVE: {
    unsigned CollapsedNum = Record[ASTStmtReader::NumStmtFields];
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
    S = OMPTargetTeamsDistributeDirective::CreateEmpty(Context, NumClauses,
                                                       CollapsedNum, Empty);
    break;
  }

  case STMT_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_FOR_DIRECTIVE: {
    unsigned CollapsedNum = Record[ASTStmtReader::NumStmtFields];
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
    S = OMPTargetTeamsDistributeParallelForDirective::CreateEmpty(
        Context, NumClauses, CollapsedNum, Empty);
    break;
  }

  case STMT_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_FOR_SIMD_DIRECTIVE: {
    unsigned CollapsedNum = Record[ASTStmtReader::NumStmtFields];
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
    S = OMPTargetTeamsDistributeParallelForSimdDirective::CreateEmpty(
        Context, NumClauses, CollapsedNum, Empty);
    break;
  }

  case STMT_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD_DIRECTIVE: {
    unsigned CollapsedNum = Record[ASTStmtReader::NumStmtFields];
    unsigned NumClauses = Record[ASTStmtReader::NumStmtFields + 1];
    S = OMPTargetTeamsDistributeSimdDirective::CreateEmpty(
        Context, NumClauses, CollapsedNum, Empty);
    break;
  }

  case STMT_OMP_INTEROP_DIRECTIVE:
    S = OMPInteropDirective::CreateEmpty(
        Context, Record[ASTStmtReader::NumStmtFields], Empty);
    break;

  case STMT_OMP_DISPATCH_DIRECTIVE:
    S = OMPDispatchDirective::CreateEmpty(
        Context, Record[ASTStmtReader::NumStmtFields], Empty);
    break;

  case STMT_OMP_MASKED_DIRECTIVE:
    S = OMPMaskedDirective::CreateEmpty(
        Context, Record[ASTStmtReader::NumStmtFields], Empty);
    break;

  case EXPR_CXX_OPERATOR_CALL:
    S = CXXOperatorCallExpr::CreateEmpty(
        Context, /*NumArgs=*/Record[ASTStmtReader::NumExprFields],
        /*HasFPFeatures=*/Record[ASTStmtReader::NumExprFields + 1], Empty);
    break;

  case EXPR_CXX_MEMBER_CALL:
    S = CXXMemberCallExpr::CreateEmpty(
        Context, /*NumArgs=*/Record[ASTStmtReader::NumExprFields],
        /*HasFPFeatures=*/Record[ASTStmtReader::NumExprFields + 1], Empty);
    break;

  case EXPR_CXX_REWRITTEN_BINARY_OPERATOR:
    S = new (Context) CXXRewrittenBinaryOperator(Empty);
    break;

  case EXPR_CXX_CONSTRUCT:
    S = CXXConstructExpr::CreateEmpty(
        Context,
        /* NumArgs=*/Record[ASTStmtReader::NumExprFields]);
    break;

  case EXPR_CXX_INHERITED_CTOR_INIT:
    S = new (Context) CXXInheritedCtorInitExpr(Empty);
    break;

  case EXPR_CXX_TEMPORARY_OBJECT:
    S = CXXTemporaryObjectExpr::CreateEmpty(
        Context,
        /* NumArgs=*/Record[ASTStmtReader::NumExprFields]);
    break;

  case EXPR_CXX_STATIC_CAST:
    S = CXXStaticCastExpr::CreateEmpty(
        Context,
        /*PathSize*/ Record[ASTStmtReader::NumExprFields],
        /*HasFPFeatures*/ Record[ASTStmtReader::NumExprFields + 1]);
    break;

  case EXPR_CXX_DYNAMIC_CAST:
    S = CXXDynamicCastExpr::CreateEmpty(Context,
                     /*PathSize*/ Record[ASTStmtReader::NumExprFields]);
    break;

  case EXPR_CXX_REINTERPRET_CAST:
    S = CXXReinterpretCastExpr::CreateEmpty(Context,
                     /*PathSize*/ Record[ASTStmtReader::NumExprFields]);
    break;

  case EXPR_CXX_CONST_CAST:
    S = CXXConstCastExpr::CreateEmpty(Context);
    break;

  case EXPR_CXX_ADDRSPACE_CAST:
    S = CXXAddrspaceCastExpr::CreateEmpty(Context);
    break;

  case EXPR_CXX_FUNCTIONAL_CAST:
    S = CXXFunctionalCastExpr::CreateEmpty(
        Context,
        /*PathSize*/ Record[ASTStmtReader::NumExprFields],
        /*HasFPFeatures*/ Record[ASTStmtReader::NumExprFields + 1]);
    break;

  case EXPR_BUILTIN_BIT_CAST:
    assert(Record[ASTStmtReader::NumExprFields] == 0 && "Wrong PathSize!")((void)0);
    S = new (Context) BuiltinBitCastExpr(Empty);
    break;

  case EXPR_USER_DEFINED_LITERAL:
    S = UserDefinedLiteral::CreateEmpty(
        Context, /*NumArgs=*/Record[ASTStmtReader::NumExprFields],
        /*HasFPFeatures=*/Record[ASTStmtReader::NumExprFields + 1], Empty);
    break;

  case EXPR_CXX_STD_INITIALIZER_LIST:
    S = new (Context) CXXStdInitializerListExpr(Empty);
    break;

  case EXPR_CXX_BOOL_LITERAL:
    S = new (Context) CXXBoolLiteralExpr(Empty);
    break;

  case EXPR_CXX_NULL_PTR_LITERAL:
    S = new (Context) CXXNullPtrLiteralExpr(Empty);
    break;

  case EXPR_CXX_TYPEID_EXPR:
    S = new (Context) CXXTypeidExpr(Empty, true);
    break;

  case EXPR_CXX_TYPEID_TYPE:
    S = new (Context) CXXTypeidExpr(Empty, false);
    break;

  case EXPR_CXX_UUIDOF_EXPR:
    S = new (Context) CXXUuidofExpr(Empty, true);
    break;

  case EXPR_CXX_PROPERTY_REF_EXPR:
    S = new (Context) MSPropertyRefExpr(Empty);
    break;

  case EXPR_CXX_PROPERTY_SUBSCRIPT_EXPR:
    S = new (Context) MSPropertySubscriptExpr(Empty);
    break;

  case EXPR_CXX_UUIDOF_TYPE:
    S = new (Context) CXXUuidofExpr(Empty, false);
    break;

  case EXPR_CXX_THIS:
    S = new (Context) CXXThisExpr(Empty);
    break;

  case EXPR_CXX_THROW:
    S = new (Context) CXXThrowExpr(Empty);
    break;

  case EXPR_CXX_DEFAULT_ARG:
    S = new (Context) CXXDefaultArgExpr(Empty);
    break;

  case EXPR_CXX_DEFAULT_INIT:
    S = new (Context) CXXDefaultInitExpr(Empty);
    break;

  case EXPR_CXX_BIND_TEMPORARY:
    S = new (Context) CXXBindTemporaryExpr(Empty);
    break;

  case EXPR_CXX_SCALAR_VALUE_INIT:
    S = new (Context) CXXScalarValueInitExpr(Empty);
    break;

  case EXPR_CXX_NEW:
    S = CXXNewExpr::CreateEmpty(
        Context,
        /*IsArray=*/Record[ASTStmtReader::NumExprFields],
        /*HasInit=*/Record[ASTStmtReader::NumExprFields + 1],
        /*NumPlacementArgs=*/Record[ASTStmtReader::NumExprFields + 2],
        /*IsParenTypeId=*/Record[ASTStmtReader::NumExprFields + 3]);
    break;

  case EXPR_CXX_DELETE:
    S = new (Context) CXXDeleteExpr(Empty);
    break;

  case EXPR_CXX_PSEUDO_DESTRUCTOR:
    S = new (Context) CXXPseudoDestructorExpr(Empty);
    break;

  case EXPR_EXPR_WITH_CLEANUPS:
    S = ExprWithCleanups::Create(Context, Empty,
                                 Record[ASTStmtReader::NumExprFields]);
    break;

  case EXPR_CXX_DEPENDENT_SCOPE_MEMBER:
    S = CXXDependentScopeMemberExpr::CreateEmpty(
        Context,
        /*HasTemplateKWAndArgsInfo=*/Record[ASTStmtReader::NumExprFields],
        /*NumTemplateArgs=*/Record[ASTStmtReader::NumExprFields + 1],
        /*HasFirstQualifierFoundInScope=*/
        Record[ASTStmtReader::NumExprFields + 2]);
    break;

  case EXPR_CXX_DEPENDENT_SCOPE_DECL_REF:
    S = DependentScopeDeclRefExpr::CreateEmpty(Context,
       /*HasTemplateKWAndArgsInfo=*/Record[ASTStmtReader::NumExprFields],
                /*NumTemplateArgs=*/Record[ASTStmtReader::NumExprFields]
                                 ? Record[ASTStmtReader::NumExprFields + 1]
                                 : 0);
    break;

  case EXPR_CXX_UNRESOLVED_CONSTRUCT:
    S = CXXUnresolvedConstructExpr::CreateEmpty(Context,
                            /*NumArgs=*/Record[ASTStmtReader::NumExprFields]);
    break;

  case EXPR_CXX_UNRESOLVED_MEMBER:
    S = UnresolvedMemberExpr::CreateEmpty(
        Context,
        /*NumResults=*/Record[ASTStmtReader::NumExprFields],
        /*HasTemplateKWAndArgsInfo=*/Record[ASTStmtReader::NumExprFields + 1],
        /*NumTemplateArgs=*/
        Record[ASTStmtReader::NumExprFields + 1]
            ? Record[ASTStmtReader::NumExprFields + 2]
            : 0);
    break;

  case EXPR_CXX_UNRESOLVED_LOOKUP:
    S = UnresolvedLookupExpr::CreateEmpty(
        Context,
        /*NumResults=*/Record[ASTStmtReader::NumExprFields],
        /*HasTemplateKWAndArgsInfo=*/Record[ASTStmtReader::NumExprFields + 1],
        /*NumTemplateArgs=*/
        Record[ASTStmtReader::NumExprFields + 1]
            ? Record[ASTStmtReader::NumExprFields + 2]
            : 0);
    break;

  case EXPR_TYPE_TRAIT:
    S = TypeTraitExpr::CreateDeserialized(Context,
          Record[ASTStmtReader::NumExprFields]);
    break;

  case EXPR_ARRAY_TYPE_TRAIT:
    S = new (Context) ArrayTypeTraitExpr(Empty);
    break;

  case EXPR_CXX_EXPRESSION_TRAIT:
    S = new (Context) ExpressionTraitExpr(Empty);
    break;

  case EXPR_CXX_NOEXCEPT:
    S = new (Context) CXXNoexceptExpr(Empty);
    break;

  case EXPR_PACK_EXPANSION:
    S = new (Context) PackExpansionExpr(Empty);
    break;

  case EXPR_SIZEOF_PACK:
    S = SizeOfPackExpr::CreateDeserialized(
            Context,
            /*NumPartialArgs=*/Record[ASTStmtReader::NumExprFields]);
    break;

  case EXPR_SUBST_NON_TYPE_TEMPLATE_PARM:
    S = new (Context) SubstNonTypeTemplateParmExpr(Empty);
    break;

  case EXPR_SUBST_NON_TYPE_TEMPLATE_PARM_PACK:
    S = new (Context) SubstNonTypeTemplateParmPackExpr(Empty);
    break;

  case EXPR_FUNCTION_PARM_PACK:
    S = FunctionParmPackExpr::CreateEmpty(Context,
                                        Record[ASTStmtReader::NumExprFields]);
    break;

  case EXPR_MATERIALIZE_TEMPORARY:
    S = new (Context) MaterializeTemporaryExpr(Empty);
    break;

  case EXPR_CXX_FOLD:
    S = new (Context) CXXFoldExpr(Empty);
    break;

  case EXPR_OPAQUE_VALUE:
    S = new (Context) OpaqueValueExpr(Empty);
    break;

  case EXPR_CUDA_KERNEL_CALL:
    S = CUDAKernelCallExpr::CreateEmpty(
        Context, /*NumArgs=*/Record[ASTStmtReader::NumExprFields],
        /*HasFPFeatures=*/Record[ASTStmtReader::NumExprFields + 1], Empty);
    break;

  case EXPR_ASTYPE:
    S = new (Context) AsTypeExpr(Empty);
    break;

  case EXPR_PSEUDO_OBJECT: {
    unsigned numSemanticExprs = Record[ASTStmtReader::NumExprFields];
    S = PseudoObjectExpr::Create(Context, Empty, numSemanticExprs);
    break;
  }

  case EXPR_ATOMIC:
    S = new (Context) AtomicExpr(Empty);
    break;

  case EXPR_LAMBDA: {
    unsigned NumCaptures = Record[ASTStmtReader::NumExprFields];
    S = LambdaExpr::CreateDeserialized(Context, NumCaptures);
    break;
  }

  case STMT_COROUTINE_BODY: {
    unsigned NumParams = Record[ASTStmtReader::NumStmtFields];
    S = CoroutineBodyStmt::Create(Context, Empty, NumParams);
    break;
  }

  case STMT_CORETURN:
    S = new (Context) CoreturnStmt(Empty);
    break;

  case EXPR_COAWAIT:
    S = new (Context) CoawaitExpr(Empty);
    break;

  case EXPR_COYIELD:
    S = new (Context) CoyieldExpr(Empty);
    break;

  case EXPR_DEPENDENT_COAWAIT:
    S = new (Context) DependentCoawaitExpr(Empty);
    break;

  case EXPR_CONCEPT_SPECIALIZATION: {
    unsigned numTemplateArgs = Record[ASTStmtReader::NumExprFields];
    S = ConceptSpecializationExpr::Create(Context, Empty, numTemplateArgs);
    break;
  }

  case EXPR_REQUIRES:
    unsigned numLocalParameters = Record[ASTStmtReader::NumExprFields];
    unsigned numRequirement = Record[ASTStmtReader::NumExprFields + 1];
    S = RequiresExpr::Create(Context, Empty, numLocalParameters,
                             numRequirement);
    break;
  }

  // We hit a STMT_STOP, so we're done with this expression.
  if (Finished)
    break;

  ++NumStatementsRead;

  if (S && !IsStmtReference) {
    Reader.Visit(S);
    StmtEntries[Cursor.GetCurrentBitNo()] = S;
  }

  assert(Record.getIdx() == Record.size() &&((void)0)
         "Invalid deserialization of statement")((void)0);
  StmtStack.push_back(S);
}
3893Done:
assert(StmtStack.size() > PrevNumStmts && "Read too many sub-stmts!")((void)0);
assert(StmtStack.size() == PrevNumStmts + 1 && "Extra expressions on stack!")((void)0);
return StmtStack.pop_back_val();
3897}

←

/usr/src/gnu/usr.bin/clang/libclangSerialization/../../../llvm/llvm/include/llvm/Bitstream/BitstreamReader.h

→

1//===- BitstreamReader.h - Low-level bitstream reader interface -*- C++ -*-===//
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 header defines the BitstreamReader class.  This class can be used to
10// read an arbitrary bitstream, regardless of its contents.
11//
12//===----------------------------------------------------------------------===//

14#ifndef LLVM_BITSTREAM_BITSTREAMREADER_H
15#define LLVM_BITSTREAM_BITSTREAMREADER_H

17#include "llvm/ADT/ArrayRef.h"
18#include "llvm/ADT/SmallVector.h"
19#include "llvm/Bitstream/BitCodes.h"
20#include "llvm/Support/Endian.h"
21#include "llvm/Support/Error.h"
22#include "llvm/Support/ErrorHandling.h"
23#include "llvm/Support/MathExtras.h"
24#include "llvm/Support/MemoryBuffer.h"
25#include <algorithm>
26#include <cassert>
27#include <climits>
28#include <cstddef>
29#include <cstdint>
30#include <memory>
31#include <string>
32#include <utility>
33#include <vector>

35namespace llvm {

37/// This class maintains the abbreviations read from a block info block.
38class BitstreamBlockInfo {
39public:
/// This contains information emitted to BLOCKINFO_BLOCK blocks. These
/// describe abbreviations that all blocks of the specified ID inherit.
struct BlockInfo {
  unsigned BlockID = 0;
  std::vector<std::shared_ptr<BitCodeAbbrev>> Abbrevs;
  std::string Name;
  std::vector<std::pair<unsigned, std::string>> RecordNames;
};

49private:
std::vector<BlockInfo> BlockInfoRecords;

52public:
/// If there is block info for the specified ID, return it, otherwise return
/// null.
const BlockInfo *getBlockInfo(unsigned BlockID) const {
  // Common case, the most recent entry matches BlockID.
  if (!BlockInfoRecords.empty() && BlockInfoRecords.back().BlockID == BlockID)
    return &BlockInfoRecords.back();

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

BlockInfo &getOrCreateBlockInfo(unsigned BlockID) {
  if (const BlockInfo *BI = getBlockInfo(BlockID))
    return *const_cast<BlockInfo*>(BI);

  // Otherwise, add a new record.
  BlockInfoRecords.emplace_back();
  BlockInfoRecords.back().BlockID = BlockID;
  return BlockInfoRecords.back();
}
76};

78/// This represents a position within a bitstream. There may be multiple
79/// independent cursors reading within one bitstream, each maintaining their
80/// own local state.
81class SimpleBitstreamCursor {
ArrayRef<uint8_t> BitcodeBytes;
size_t NextChar = 0;

85public:
/// This is the current data we have pulled from the stream but have not
/// returned to the client. This is specifically and intentionally defined to
/// follow the word size of the host machine for efficiency. We use word_t in
/// places that are aware of this to make it perfectly explicit what is going
/// on.
using word_t = size_t;

93private:
word_t CurWord = 0;

/// This is the number of bits in CurWord that are valid. This is always from
/// [0...bits_of(size_t)-1] inclusive.
unsigned BitsInCurWord = 0;

100public:
static const constexpr size_t MaxChunkSize = sizeof(word_t) * 8;

SimpleBitstreamCursor() = default;
explicit SimpleBitstreamCursor(ArrayRef<uint8_t> BitcodeBytes)
    : BitcodeBytes(BitcodeBytes) {}
explicit SimpleBitstreamCursor(StringRef BitcodeBytes)
    : BitcodeBytes(arrayRefFromStringRef(BitcodeBytes)) {}
explicit SimpleBitstreamCursor(MemoryBufferRef BitcodeBytes)
    : SimpleBitstreamCursor(BitcodeBytes.getBuffer()) {}

bool canSkipToPos(size_t pos) const {
  // pos can be skipped to if it is a valid address or one byte past the end.
  return pos <= BitcodeBytes.size();
}

bool AtEndOfStream() {
  return BitsInCurWord == 0 && BitcodeBytes.size() <= NextChar;
}

/// Return the bit # of the bit we are reading.
uint64_t GetCurrentBitNo() const {
  return NextChar*CHAR_BIT8 - BitsInCurWord;
}

// Return the byte # of the current bit.
uint64_t getCurrentByteNo() const { return GetCurrentBitNo() / 8; }

ArrayRef<uint8_t> getBitcodeBytes() const { return BitcodeBytes; }

/// Reset the stream to the specified bit number.
Error JumpToBit(uint64_t BitNo) {
  size_t ByteNo = size_t(BitNo/8) & ~(sizeof(word_t)-1);
  unsigned WordBitNo = unsigned(BitNo & (sizeof(word_t)*8-1));
  assert(canSkipToPos(ByteNo) && "Invalid location")((void)0);

  // Move the cursor to the right word.
  NextChar = ByteNo;
  BitsInCurWord = 0;

  // Skip over any bits that are already consumed.
  if (WordBitNo) {
    if (Expected<word_t> Res = Read(WordBitNo))
      return Error::success();
    else
      return Res.takeError();
  }

  return Error::success();
}

/// Get a pointer into the bitstream at the specified byte offset.
const uint8_t *getPointerToByte(uint64_t ByteNo, uint64_t NumBytes) {
  return BitcodeBytes.data() + ByteNo;
}

/// Get a pointer into the bitstream at the specified bit offset.
///
/// The bit offset must be on a byte boundary.
const uint8_t *getPointerToBit(uint64_t BitNo, uint64_t NumBytes) {
  assert(!(BitNo % 8) && "Expected bit on byte boundary")((void)0);
  return getPointerToByte(BitNo / 8, NumBytes);
}

Error fillCurWord() {
  if (NextChar >= BitcodeBytes.size())
    return createStringError(std::errc::io_error,
                             "Unexpected end of file reading %u of %u bytes",
                             NextChar, BitcodeBytes.size());

  // Read the next word from the stream.
  const uint8_t *NextCharPtr = BitcodeBytes.data() + NextChar;
  unsigned BytesRead;
  if (BitcodeBytes.size() >= NextChar + sizeof(word_t)) {
    BytesRead = sizeof(word_t);
    CurWord =
        support::endian::read<word_t, support::little, support::unaligned>(
            NextCharPtr);
  } else {
    // Short read.
    BytesRead = BitcodeBytes.size() - NextChar;
    CurWord = 0;
    for (unsigned B = 0; B != BytesRead; ++B)
      CurWord |= uint64_t(NextCharPtr[B]) << (B * 8);
  }
  NextChar += BytesRead;
  BitsInCurWord = BytesRead * 8;
  return Error::success();
}

Expected<word_t> Read(unsigned NumBits) {
  static const unsigned BitsInWord = MaxChunkSize;

  assert(NumBits && NumBits <= BitsInWord &&((void)0)
         "Cannot return zero or more than BitsInWord bits!")((void)0);

  static const unsigned Mask = sizeof(word_t) > 4 ? 0x3f : 0x1f;
9
←
'?' condition is true→

  // If the field is fully contained by CurWord, return it quickly.
  if (BitsInCurWord >= NumBits) {
10
←
Assuming 'NumBits' is > field 'BitsInCurWord'→
11
←
Taking false branch→
    word_t R = CurWord & (~word_t(0) >> (BitsInWord - NumBits));

    // Use a mask to avoid undefined behavior.
    CurWord >>= (NumBits & Mask);

    BitsInCurWord -= NumBits;
    return R;
  }

  word_t R = BitsInCurWord11.1
Field 'BitsInCurWord' is not equal to 0
1
Field 'BitsInCurWord' is not equal to 0
1
Field 'BitsInCurWord' is not equal to 0
 ? CurWord : 0;
12
←
'?' condition is true→
  unsigned BitsLeft = NumBits - BitsInCurWord;

  if (Error fillResult = fillCurWord())
13
←
Calling 'Error::operator bool'→
15
←
Returning from 'Error::operator bool'→
16
←
Taking false branch→
    return std::move(fillResult);

  // If we run out of data, abort.
  if (BitsLeft > BitsInCurWord)
17
←
Assuming 'BitsLeft' is <= field 'BitsInCurWord'→
18
←
Taking false branch→
    return createStringError(std::errc::io_error,
                             "Unexpected end of file reading %u of %u bits",
                             BitsInCurWord, BitsLeft);

  word_t R2 = CurWord & (~word_t(0) >> (BitsInWord - BitsLeft));
19
←
The result of the right shift is undefined due to shifting by '64', which is greater or equal to the width of type 'llvm::SimpleBitstreamCursor::word_t'

  // Use a mask to avoid undefined behavior.
  CurWord >>= (BitsLeft & Mask);

  BitsInCurWord -= BitsLeft;

  R |= R2 << (NumBits - BitsLeft);

  return R;
}

Expected<uint32_t> ReadVBR(unsigned NumBits) {
  Expected<unsigned> MaybeRead = Read(NumBits);
  if (!MaybeRead)
    return MaybeRead;
  uint32_t Piece = MaybeRead.get();

  if ((Piece & (1U << (NumBits-1))) == 0)
    return Piece;

  uint32_t Result = 0;
  unsigned NextBit = 0;
  while (true) {
    Result |= (Piece & ((1U << (NumBits-1))-1)) << NextBit;

    if ((Piece & (1U << (NumBits-1))) == 0)
      return Result;

    NextBit += NumBits-1;
    MaybeRead = Read(NumBits);
    if (!MaybeRead)
      return MaybeRead;
    Piece = MaybeRead.get();
  }
}

// Read a VBR that may have a value up to 64-bits in size. The chunk size of
// the VBR must still be <= 32 bits though.
Expected<uint64_t> ReadVBR64(unsigned NumBits) {
  Expected<uint64_t> MaybeRead = Read(NumBits);
  if (!MaybeRead)
    return MaybeRead;
  uint32_t Piece = MaybeRead.get();

  if ((Piece & (1U << (NumBits-1))) == 0)
    return uint64_t(Piece);

  uint64_t Result = 0;
  unsigned NextBit = 0;
  while (true) {
    Result |= uint64_t(Piece & ((1U << (NumBits-1))-1)) << NextBit;

    if ((Piece & (1U << (NumBits-1))) == 0)
      return Result;

    NextBit += NumBits-1;
    MaybeRead = Read(NumBits);
    if (!MaybeRead)
      return MaybeRead;
    Piece = MaybeRead.get();
  }
}

void SkipToFourByteBoundary() {
  // If word_t is 64-bits and if we've read less than 32 bits, just dump
  // the bits we have up to the next 32-bit boundary.
  if (sizeof(word_t) > 4 &&
      BitsInCurWord >= 32) {
    CurWord >>= BitsInCurWord-32;
    BitsInCurWord = 32;
    return;
  }

  BitsInCurWord = 0;
}

/// Return the size of the stream in bytes.
size_t SizeInBytes() const { return BitcodeBytes.size(); }

/// Skip to the end of the file.
void skipToEnd() { NextChar = BitcodeBytes.size(); }
303};

305/// When advancing through a bitstream cursor, each advance can discover a few
306/// different kinds of entries:
307struct BitstreamEntry {
enum {
  Error,    // Malformed bitcode was found.
  EndBlock, // We've reached the end of the current block, (or the end of the
            // file, which is treated like a series of EndBlock records.
  SubBlock, // This is the start of a new subblock of a specific ID.
  Record    // This is a record with a specific AbbrevID.
} Kind;

unsigned ID;

static BitstreamEntry getError() {
  BitstreamEntry E; E.Kind = Error; return E;
}

static BitstreamEntry getEndBlock() {
  BitstreamEntry E; E.Kind = EndBlock; return E;
}

static BitstreamEntry getSubBlock(unsigned ID) {
  BitstreamEntry E; E.Kind = SubBlock; E.ID = ID; return E;
}

static BitstreamEntry getRecord(unsigned AbbrevID) {
  BitstreamEntry E; E.Kind = Record; E.ID = AbbrevID; return E;
}
333};

335/// This represents a position within a bitcode file, implemented on top of a
336/// SimpleBitstreamCursor.
337///
338/// Unlike iterators, BitstreamCursors are heavy-weight objects that should not
339/// be passed by value.
340class BitstreamCursor : SimpleBitstreamCursor {
// This is the declared size of code values used for the current block, in
// bits.
unsigned CurCodeSize = 2;

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

struct Block {
  unsigned PrevCodeSize;
  std::vector<std::shared_ptr<BitCodeAbbrev>> PrevAbbrevs;

  explicit Block(unsigned PCS) : PrevCodeSize(PCS) {}
};

/// This tracks the codesize of parent blocks.
SmallVector<Block, 8> BlockScope;

BitstreamBlockInfo *BlockInfo = nullptr;

360public:
static const size_t MaxChunkSize = sizeof(word_t) * 8;

BitstreamCursor() = default;
explicit BitstreamCursor(ArrayRef<uint8_t> BitcodeBytes)
    : SimpleBitstreamCursor(BitcodeBytes) {}
explicit BitstreamCursor(StringRef BitcodeBytes)
    : SimpleBitstreamCursor(BitcodeBytes) {}
explicit BitstreamCursor(MemoryBufferRef BitcodeBytes)
    : SimpleBitstreamCursor(BitcodeBytes) {}

using SimpleBitstreamCursor::AtEndOfStream;
using SimpleBitstreamCursor::canSkipToPos;
using SimpleBitstreamCursor::fillCurWord;
using SimpleBitstreamCursor::getBitcodeBytes;
using SimpleBitstreamCursor::GetCurrentBitNo;
using SimpleBitstreamCursor::getCurrentByteNo;
using SimpleBitstreamCursor::getPointerToByte;
using SimpleBitstreamCursor::JumpToBit;
using SimpleBitstreamCursor::Read;
using SimpleBitstreamCursor::ReadVBR;
using SimpleBitstreamCursor::ReadVBR64;
using SimpleBitstreamCursor::SizeInBytes;
using SimpleBitstreamCursor::skipToEnd;

/// Return the number of bits used to encode an abbrev #.
unsigned getAbbrevIDWidth() const { return CurCodeSize; }

/// Flags that modify the behavior of advance().
enum {
  /// If this flag is used, the advance() method does not automatically pop
  /// the block scope when the end of a block is reached.
  AF_DontPopBlockAtEnd = 1,

  /// If this flag is used, abbrev entries are returned just like normal
  /// records.
  AF_DontAutoprocessAbbrevs = 2
};

/// Advance the current bitstream, returning the next entry in the stream.
Expected<BitstreamEntry> advance(unsigned Flags = 0) {
  while (true) {
5
←
Loop condition is true.  Entering loop body→
    if (AtEndOfStream())
6
←
Taking false branch→
      return BitstreamEntry::getError();

    Expected<unsigned> MaybeCode = ReadCode();
7
←
Calling 'BitstreamCursor::ReadCode'→
    if (!MaybeCode)
      return MaybeCode.takeError();
    unsigned Code = MaybeCode.get();

    if (Code == bitc::END_BLOCK) {
      // Pop the end of the block unless Flags tells us not to.
      if (!(Flags & AF_DontPopBlockAtEnd) && ReadBlockEnd())
        return BitstreamEntry::getError();
      return BitstreamEntry::getEndBlock();
    }

    if (Code == bitc::ENTER_SUBBLOCK) {
      if (Expected<unsigned> MaybeSubBlock = ReadSubBlockID())
        return BitstreamEntry::getSubBlock(MaybeSubBlock.get());
      else
        return MaybeSubBlock.takeError();
    }

    if (Code == bitc::DEFINE_ABBREV &&
        !(Flags & AF_DontAutoprocessAbbrevs)) {
      // We read and accumulate abbrev's, the client can't do anything with
      // them anyway.
      if (Error Err = ReadAbbrevRecord())
        return std::move(Err);
      continue;
    }

    return BitstreamEntry::getRecord(Code);
  }
}

/// This is a convenience function for clients that don't expect any
/// subblocks. This just skips over them automatically.
Expected<BitstreamEntry> advanceSkippingSubblocks(unsigned Flags = 0) {
  while (true) {
3
←
Loop condition is true.  Entering loop body→
    // If we found a normal entry, return it.
    Expected<BitstreamEntry> MaybeEntry = advance(Flags);
4
←
Calling 'BitstreamCursor::advance'→
    if (!MaybeEntry)
      return MaybeEntry;
    BitstreamEntry Entry = MaybeEntry.get();

    if (Entry.Kind != BitstreamEntry::SubBlock)
      return Entry;

    // If we found a sub-block, just skip over it and check the next entry.
    if (Error Err = SkipBlock())
      return std::move(Err);
  }
}

Expected<unsigned> ReadCode() { return Read(CurCodeSize); }
8
←
Calling 'SimpleBitstreamCursor::Read'→

// Block header:
//    [ENTER_SUBBLOCK, blockid, newcodelen, <align4bytes>, blocklen]

/// Having read the ENTER_SUBBLOCK code, read the BlockID for the block.
Expected<unsigned> ReadSubBlockID() { return ReadVBR(bitc::BlockIDWidth); }

/// Having read the ENTER_SUBBLOCK abbrevid and a BlockID, skip over the body
/// of this block.
Error SkipBlock() {
  // Read and ignore the codelen value.
  if (Expected<uint32_t> Res = ReadVBR(bitc::CodeLenWidth))
    ; // Since we are skipping this block, we don't care what code widths are
      // used inside of it.
  else
    return Res.takeError();

  SkipToFourByteBoundary();
  Expected<unsigned> MaybeNum = Read(bitc::BlockSizeWidth);
  if (!MaybeNum)
    return MaybeNum.takeError();
  size_t NumFourBytes = MaybeNum.get();

  // Check that the block wasn't partially defined, and that the offset isn't
  // bogus.
  size_t SkipTo = GetCurrentBitNo() + NumFourBytes * 4 * 8;
  if (AtEndOfStream())
    return createStringError(std::errc::illegal_byte_sequence,
                             "can't skip block: already at end of stream");
  if (!canSkipToPos(SkipTo / 8))
    return createStringError(std::errc::illegal_byte_sequence,
                             "can't skip to bit %zu from %" PRIu64"llu", SkipTo,
                             GetCurrentBitNo());

  if (Error Res = JumpToBit(SkipTo))
    return Res;

  return Error::success();
}

/// Having read the ENTER_SUBBLOCK abbrevid, and enter the block.
Error EnterSubBlock(unsigned BlockID, unsigned *NumWordsP = nullptr);

bool ReadBlockEnd() {
  if (BlockScope.empty()) return true;

  // Block tail:
  //    [END_BLOCK, <align4bytes>]
  SkipToFourByteBoundary();

  popBlockScope();
  return false;
}

511private:
void popBlockScope() {
  CurCodeSize = BlockScope.back().PrevCodeSize;

  CurAbbrevs = std::move(BlockScope.back().PrevAbbrevs);
  BlockScope.pop_back();
}

//===--------------------------------------------------------------------===//
// Record Processing
//===--------------------------------------------------------------------===//

523public:
/// Return the abbreviation for the specified AbbrevId.
const BitCodeAbbrev *getAbbrev(unsigned AbbrevID) {
  unsigned AbbrevNo = AbbrevID - bitc::FIRST_APPLICATION_ABBREV;
  if (AbbrevNo >= CurAbbrevs.size())
    report_fatal_error("Invalid abbrev number");
  return CurAbbrevs[AbbrevNo].get();
}

/// Read the current record and discard it, returning the code for the record.
Expected<unsigned> skipRecord(unsigned AbbrevID);

Expected<unsigned> readRecord(unsigned AbbrevID,
                              SmallVectorImpl<uint64_t> &Vals,
                              StringRef *Blob = nullptr);

//===--------------------------------------------------------------------===//
// Abbrev Processing
//===--------------------------------------------------------------------===//
Error ReadAbbrevRecord();

/// Read and return a block info block from the bitstream. If an error was
/// encountered, return None.
///
/// \param ReadBlockInfoNames Whether to read block/record name information in
/// the BlockInfo block. Only llvm-bcanalyzer uses this.
Expected<Optional<BitstreamBlockInfo>>
ReadBlockInfoBlock(bool ReadBlockInfoNames = false);

/// Set the block info to be used by this BitstreamCursor to interpret
/// abbreviated records.
void setBlockInfo(BitstreamBlockInfo *BI) { BlockInfo = BI; }
555};

557} // end llvm namespace

559#endif // LLVM_BITSTREAM_BITSTREAMREADER_H

←

/usr/src/gnu/usr.bin/clang/libclangSerialization/../../../llvm/llvm/include/llvm/Support/Error.h

1//===- llvm/Support/Error.h - Recoverable error handling --------*- C++ -*-===//
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 an API used to report recoverable errors.
10//
11//===----------------------------------------------------------------------===//
12 
13#ifndef LLVM_SUPPORT_ERROR_H
14#define LLVM_SUPPORT_ERROR_H
15 
16#include "llvm-c/Error.h"
17#include "llvm/ADT/STLExtras.h"
18#include "llvm/ADT/SmallVector.h"
19#include "llvm/ADT/StringExtras.h"
20#include "llvm/ADT/Twine.h"
21#include "llvm/Config/abi-breaking.h"
22#include "llvm/Support/AlignOf.h"
23#include "llvm/Support/Compiler.h"
24#include "llvm/Support/Debug.h"
25#include "llvm/Support/ErrorHandling.h"
26#include "llvm/Support/ErrorOr.h"
27#include "llvm/Support/Format.h"
28#include "llvm/Support/raw_ostream.h"
29#include <algorithm>
30#include <cassert>
31#include <cstdint>
32#include <cstdlib>
33#include <functional>
34#include <memory>
35#include <new>
36#include <string>
37#include <system_error>
38#include <type_traits>
39#include <utility>
40#include <vector>
41 
42namespace llvm {
43 
44class ErrorSuccess;
45 
46/// Base class for error info classes. Do not extend this directly: Extend
47/// the ErrorInfo template subclass instead.
48class ErrorInfoBase {
49public:
50  virtual ~ErrorInfoBase() = default;
51 
52  /// Print an error message to an output stream.
53  virtual void log(raw_ostream &OS) const = 0;
54 
55  /// Return the error message as a string.
56  virtual std::string message() const {
57    std::string Msg;
58    raw_string_ostream OS(Msg);
59    log(OS);
60    return OS.str();
61  }
62 
63  /// Convert this error to a std::error_code.
64  ///
65  /// This is a temporary crutch to enable interaction with code still
66  /// using std::error_code. It will be removed in the future.
67  virtual std::error_code convertToErrorCode() const = 0;
68 
69  // Returns the class ID for this type.
70  static const void *classID() { return &ID; }
71 
72  // Returns the class ID for the dynamic type of this ErrorInfoBase instance.
73  virtual const void *dynamicClassID() const = 0;
74 
75  // Check whether this instance is a subclass of the class identified by
76  // ClassID.
77  virtual bool isA(const void *const ClassID) const {
78    return ClassID == classID();
79  }
80 
81  // Check whether this instance is a subclass of ErrorInfoT.
82  template <typename ErrorInfoT> bool isA() const {
83    return isA(ErrorInfoT::classID());
84  }
85 
86private:
87  virtual void anchor();
88 
89  static char ID;
90};
91 
92/// Lightweight error class with error context and mandatory checking.
93///
94/// Instances of this class wrap a ErrorInfoBase pointer. Failure states
95/// are represented by setting the pointer to a ErrorInfoBase subclass
96/// instance containing information describing the failure. Success is
97/// represented by a null pointer value.
98///
99/// Instances of Error also contains a 'Checked' flag, which must be set
100/// before the destructor is called, otherwise the destructor will trigger a
101/// runtime error. This enforces at runtime the requirement that all Error
102/// instances be checked or returned to the caller.
103///
104/// There are two ways to set the checked flag, depending on what state the
105/// Error instance is in. For Error instances indicating success, it
106/// is sufficient to invoke the boolean conversion operator. E.g.:
107///
108///   @code{.cpp}
109///   Error foo(<...>);
110///
111///   if (auto E = foo(<...>))
112///     return E; // <- Return E if it is in the error state.
113///   // We have verified that E was in the success state. It can now be safely
114///   // destroyed.
115///   @endcode
116///
117/// A success value *can not* be dropped. For example, just calling 'foo(<...>)'
118/// without testing the return value will raise a runtime error, even if foo
119/// returns success.
120///
121/// For Error instances representing failure, you must use either the
122/// handleErrors or handleAllErrors function with a typed handler. E.g.:
123///
124///   @code{.cpp}
125///   class MyErrorInfo : public ErrorInfo<MyErrorInfo> {
126///     // Custom error info.
127///   };
128///
129///   Error foo(<...>) { return make_error<MyErrorInfo>(...); }
130///
131///   auto E = foo(<...>); // <- foo returns failure with MyErrorInfo.
132///   auto NewE =
133///     handleErrors(E,
134///       [](const MyErrorInfo &M) {
135///         // Deal with the error.
136///       },
137///       [](std::unique_ptr<OtherError> M) -> Error {
138///         if (canHandle(*M)) {
139///           // handle error.
140///           return Error::success();
141///         }
142///         // Couldn't handle this error instance. Pass it up the stack.
143///         return Error(std::move(M));
144///       );
145///   // Note - we must check or return NewE in case any of the handlers
146///   // returned a new error.
147///   @endcode
148///
149/// The handleAllErrors function is identical to handleErrors, except
150/// that it has a void return type, and requires all errors to be handled and
151/// no new errors be returned. It prevents errors (assuming they can all be
152/// handled) from having to be bubbled all the way to the top-level.
153///
154/// *All* Error instances must be checked before destruction, even if
155/// they're moved-assigned or constructed from Success values that have already
156/// been checked. This enforces checking through all levels of the call stack.
157class LLVM_NODISCARD[[clang::warn_unused_result]] Error {
158  // ErrorList needs to be able to yank ErrorInfoBase pointers out of Errors
159  // to add to the error list. It can't rely on handleErrors for this, since
160  // handleErrors does not support ErrorList handlers.
161  friend class ErrorList;
162 
163  // handleErrors needs to be able to set the Checked flag.
164  template <typename... HandlerTs>
165  friend Error handleErrors(Error E, HandlerTs &&... Handlers);
166 
167  // Expected<T> needs to be able to steal the payload when constructed from an
168  // error.
169  template <typename T> friend class Expected;
170 
171  // wrap needs to be able to steal the payload.
172  friend LLVMErrorRef wrap(Error);
173 
174protected:
175  /// Create a success value. Prefer using 'Error::success()' for readability
176  Error() {
177    setPtr(nullptr);
178    setChecked(false);
179  }
180 
181public:
182  /// Create a success value.
183  static ErrorSuccess success();
184 
185  // Errors are not copy-constructable.
186  Error(const Error &Other) = delete;
187 
188  /// Move-construct an error value. The newly constructed error is considered
189  /// unchecked, even if the source error had been checked. The original error
190  /// becomes a checked Success value, regardless of its original state.
191  Error(Error &&Other) {
192    setChecked(true);
193    *this = std::move(Other);
194  }
195 
196  /// Create an error value. Prefer using the 'make_error' function, but
197  /// this constructor can be useful when "re-throwing" errors from handlers.
198  Error(std::unique_ptr<ErrorInfoBase> Payload) {
199    setPtr(Payload.release());
200    setChecked(false);
201  }
202 
203  // Errors are not copy-assignable.
204  Error &operator=(const Error &Other) = delete;
205 
206  /// Move-assign an error value. The current error must represent success, you
207  /// you cannot overwrite an unhandled error. The current error is then
208  /// considered unchecked. The source error becomes a checked success value,
209  /// regardless of its original state.
210  Error &operator=(Error &&Other) {
211    // Don't allow overwriting of unchecked values.
212    assertIsChecked();
213    setPtr(Other.getPtr());
214 
215    // This Error is unchecked, even if the source error was checked.
216    setChecked(false);
217 
218    // Null out Other's payload and set its checked bit.
219    Other.setPtr(nullptr);
220    Other.setChecked(true);
221 
222    return *this;
223  }
224 
225  /// Destroy a Error. Fails with a call to abort() if the error is
226  /// unchecked.
227  ~Error() {
228    assertIsChecked();
229    delete getPtr();
230  }
231 
232  /// Bool conversion. Returns true if this Error is in a failure state,
233  /// and false if it is in an accept state. If the error is in a Success state
234  /// it will be considered checked.
235  explicit operator bool() {
236    setChecked(getPtr() == nullptr);
237    return getPtr() != nullptr;
14
←
Returning zero, which participates in a condition later→
238  }
239 
240  /// Check whether one error is a subclass of another.
241  template <typename ErrT> bool isA() const {
242    return getPtr() && getPtr()->isA(ErrT::classID());
243  }
244 
245  /// Returns the dynamic class id of this error, or null if this is a success
246  /// value.
247  const void* dynamicClassID() const {
248    if (!getPtr())
249      return nullptr;
250    return getPtr()->dynamicClassID();
251  }
252 
253private:
254#if LLVM_ENABLE_ABI_BREAKING_CHECKS0
255  // assertIsChecked() happens very frequently, but under normal circumstances
256  // is supposed to be a no-op.  So we want it to be inlined, but having a bunch
257  // of debug prints can cause the function to be too large for inlining.  So
258  // it's important that we define this function out of line so that it can't be
259  // inlined.
260  LLVM_ATTRIBUTE_NORETURN__attribute__((noreturn))
261  void fatalUncheckedError() const;
262#endif
263 
264  void assertIsChecked() {
265#if LLVM_ENABLE_ABI_BREAKING_CHECKS0
266    if (LLVM_UNLIKELY(!getChecked() || getPtr())__builtin_expect((bool)(!getChecked() || getPtr()), false))
267      fatalUncheckedError();
268#endif
269  }
270 
271  ErrorInfoBase *getPtr() const {
272#if LLVM_ENABLE_ABI_BREAKING_CHECKS0
273    return reinterpret_cast<ErrorInfoBase*>(
274             reinterpret_cast<uintptr_t>(Payload) &
275             ~static_cast<uintptr_t>(0x1));
276#else
277    return Payload;
278#endif
279  }
280 
281  void setPtr(ErrorInfoBase *EI) {
282#if LLVM_ENABLE_ABI_BREAKING_CHECKS0
283    Payload = reinterpret_cast<ErrorInfoBase*>(
284                (reinterpret_cast<uintptr_t>(EI) &
285                 ~static_cast<uintptr_t>(0x1)) |
286                (reinterpret_cast<uintptr_t>(Payload) & 0x1));
287#else
288    Payload = EI;
289#endif
290  }
291 
292  bool getChecked() const {
293#if LLVM_ENABLE_ABI_BREAKING_CHECKS0
294    return (reinterpret_cast<uintptr_t>(Payload) & 0x1) == 0;
295#else
296    return true;
297#endif
298  }
299 
300  void setChecked(bool V) {
301#if LLVM_ENABLE_ABI_BREAKING_CHECKS0
302    Payload = reinterpret_cast<ErrorInfoBase*>(
303                (reinterpret_cast<uintptr_t>(Payload) &
304                  ~static_cast<uintptr_t>(0x1)) |
305                  (V ? 0 : 1));
306#endif
307  }
308 
309  std::unique_ptr<ErrorInfoBase> takePayload() {
310    std::unique_ptr<ErrorInfoBase> Tmp(getPtr());
311    setPtr(nullptr);
312    setChecked(true);
313    return Tmp;
314  }
315 
316  friend raw_ostream &operator<<(raw_ostream &OS, const Error &E) {
317    if (auto P = E.getPtr())
318      P->log(OS);
319    else
320      OS << "success";
321    return OS;
322  }
323 
324  ErrorInfoBase *Payload = nullptr;
325};
326 
327/// Subclass of Error for the sole purpose of identifying the success path in
328/// the type system. This allows to catch invalid conversion to Expected<T> at
329/// compile time.
330class ErrorSuccess final : public Error {};
331 
332inline ErrorSuccess Error::success() { return ErrorSuccess(); }
333 
334/// Make a Error instance representing failure using the given error info
335/// type.
336template <typename ErrT, typename... ArgTs> Error make_error(ArgTs &&... Args) {
337  return Error(std::make_unique<ErrT>(std::forward<ArgTs>(Args)...));
338}
339 
340/// Base class for user error types. Users should declare their error types
341/// like:
342///
343/// class MyError : public ErrorInfo<MyError> {
344///   ....
345/// };
346///
347/// This class provides an implementation of the ErrorInfoBase::kind
348/// method, which is used by the Error RTTI system.
349template <typename ThisErrT, typename ParentErrT = ErrorInfoBase>
350class ErrorInfo : public ParentErrT {
351public:
352  using ParentErrT::ParentErrT; // inherit constructors
353 
354  static const void *classID() { return &ThisErrT::ID; }
355 
356  const void *dynamicClassID() const override { return &ThisErrT::ID; }
357 
358  bool isA(const void *const ClassID) const override {
359    return ClassID == classID() || ParentErrT::isA(ClassID);
360  }
361};
362 
363/// Special ErrorInfo subclass representing a list of ErrorInfos.
364/// Instances of this class are constructed by joinError.
365class ErrorList final : public ErrorInfo<ErrorList> {
366  // handleErrors needs to be able to iterate the payload list of an
367  // ErrorList.
368  template <typename... HandlerTs>
369  friend Error handleErrors(Error E, HandlerTs &&... Handlers);
370 
371  // joinErrors is implemented in terms of join.
372  friend Error joinErrors(Error, Error);
373 
374public:
375  void log(raw_ostream &OS) const override {
376    OS << "Multiple errors:\n";
377    for (auto &ErrPayload : Payloads) {
378      ErrPayload->log(OS);
379      OS << "\n";
380    }
381  }
382 
383  std::error_code convertToErrorCode() const override;
384 
385  // Used by ErrorInfo::classID.
386  static char ID;
387 
388private:
389  ErrorList(std::unique_ptr<ErrorInfoBase> Payload1,
390            std::unique_ptr<ErrorInfoBase> Payload2) {
391    assert(!Payload1->isA<ErrorList>() && !Payload2->isA<ErrorList>() &&((void)0)
392           "ErrorList constructor payloads should be singleton errors")((void)0);
393    Payloads.push_back(std::move(Payload1));
394    Payloads.push_back(std::move(Payload2));
395  }
396 
397  static Error join(Error E1, Error E2) {
398    if (!E1)
399      return E2;
400    if (!E2)
401      return E1;
402    if (E1.isA<ErrorList>()) {
403      auto &E1List = static_cast<ErrorList &>(*E1.getPtr());
404      if (E2.isA<ErrorList>()) {
405        auto E2Payload = E2.takePayload();
406        auto &E2List = static_cast<ErrorList &>(*E2Payload);
407        for (auto &Payload : E2List.Payloads)
408          E1List.Payloads.push_back(std::move(Payload));
409      } else
410        E1List.Payloads.push_back(E2.takePayload());
411 
412      return E1;
413    }
414    if (E2.isA<ErrorList>()) {
415      auto &E2List = static_cast<ErrorList &>(*E2.getPtr());
416      E2List.Payloads.insert(E2List.Payloads.begin(), E1.takePayload());
417      return E2;
418    }
419    return Error(std::unique_ptr<ErrorList>(
420        new ErrorList(E1.takePayload(), E2.takePayload())));
421  }
422 
423  std::vector<std::unique_ptr<ErrorInfoBase>> Payloads;
424};
425 
426/// Concatenate errors. The resulting Error is unchecked, and contains the
427/// ErrorInfo(s), if any, contained in E1, followed by the
428/// ErrorInfo(s), if any, contained in E2.
429inline Error joinErrors(Error E1, Error E2) {
430  return ErrorList::join(std::move(E1), std::move(E2));
431}
432 
433/// Tagged union holding either a T or a Error.
434///
435/// This class parallels ErrorOr, but replaces error_code with Error. Since
436/// Error cannot be copied, this class replaces getError() with
437/// takeError(). It also adds an bool errorIsA<ErrT>() method for testing the
438/// error class type.
439///
440/// Example usage of 'Expected<T>' as a function return type:
441///
442///   @code{.cpp}
443///     Expected<int> myDivide(int A, int B) {
444///       if (B == 0) {
445///         // return an Error
446///         return createStringError(inconvertibleErrorCode(),
447///                                  "B must not be zero!");
448///       }
449///       // return an integer
450///       return A / B;
451///     }
452///   @endcode
453///
454///   Checking the results of to a function returning 'Expected<T>':
455///   @code{.cpp}
456///     if (auto E = Result.takeError()) {
457///       // We must consume the error. Typically one of:
458///       // - return the error to our caller
459///       // - toString(), when logging
460///       // - consumeError(), to silently swallow the error
461///       // - handleErrors(), to distinguish error types
462///       errs() << "Problem with division " << toString(std::move(E)) << "\n";
463///       return;
464///     }
465///     // use the result
466///     outs() << "The answer is " << *Result << "\n";
467///   @endcode
468///
469///  For unit-testing a function returning an 'Expceted<T>', see the
470///  'EXPECT_THAT_EXPECTED' macros in llvm/Testing/Support/Error.h
471 
472template <class T> class LLVM_NODISCARD[[clang::warn_unused_result]] Expected {
473  template <class T1> friend class ExpectedAsOutParameter;
474  template <class OtherT> friend class Expected;
475 
476  static constexpr bool isRef = std::is_reference<T>::value;
477 
478  using wrap = std::reference_wrapper<std::remove_reference_t<T>>;
479 
480  using error_type = std::unique_ptr<ErrorInfoBase>;
481 
482public:
483  using storage_type = std::conditional_t<isRef, wrap, T>;
484  using value_type = T;
485 
486private:
487  using reference = std::remove_reference_t<T> &;
488  using const_reference = const std::remove_reference_t<T> &;
489  using pointer = std::remove_reference_t<T> *;
490  using const_pointer = const std::remove_reference_t<T> *;
491 
492public:
493  /// Create an Expected<T> error value from the given Error.
494  Expected(Error Err)
495      : HasError(true)
496#if LLVM_ENABLE_ABI_BREAKING_CHECKS0
497        // Expected is unchecked upon construction in Debug builds.
498        , Unchecked(true)
499#endif
500  {
501    assert(Err && "Cannot create Expected<T> from Error success value.")((void)0);
502    new (getErrorStorage()) error_type(Err.takePayload());
503  }
504 
505  /// Forbid to convert from Error::success() implicitly, this avoids having
506  /// Expected<T> foo() { return Error::success(); } which compiles otherwise
507  /// but triggers the assertion above.
508  Expected(ErrorSuccess) = delete;
509 
510  /// Create an Expected<T> success value from the given OtherT value, which
511  /// must be convertible to T.
512  template <typename OtherT>
513  Expected(OtherT &&Val,
514           std::enable_if_t<std::is_convertible<OtherT, T>::value> * = nullptr)
515      : HasError(false)
516#if LLVM_ENABLE_ABI_BREAKING_CHECKS0
517        // Expected is unchecked upon construction in Debug builds.
518        ,
519        Unchecked(true)
520#endif
521  {
522    new (getStorage()) storage_type(std::forward<OtherT>(Val));
523  }
524 
525  /// Move construct an Expected<T> value.
526  Expected(Expected &&Other) { moveConstruct(std::move(Other)); }
527 
528  /// Move construct an Expected<T> value from an Expected<OtherT>, where OtherT
529  /// must be convertible to T.
530  template <class OtherT>
531  Expected(
532      Expected<OtherT> &&Other,
533      std::enable_if_t<std::is_convertible<OtherT, T>::value> * = nullptr) {
534    moveConstruct(std::move(Other));
535  }
536 
537  /// Move construct an Expected<T> value from an Expected<OtherT>, where OtherT
538  /// isn't convertible to T.
539  template <class OtherT>
540  explicit Expected(
541      Expected<OtherT> &&Other,
542      std::enable_if_t<!std::is_convertible<OtherT, T>::value> * = nullptr) {
543    moveConstruct(std::move(Other));
544  }
545 
546  /// Move-assign from another Expected<T>.
547  Expected &operator=(Expected &&Other) {
548    moveAssign(std::move(Other));
549    return *this;
550  }
551 
552  /// Destroy an Expected<T>.
553  ~Expected() {
554    assertIsChecked();
555    if (!HasError)
556      getStorage()->~storage_type();
557    else
558      getErrorStorage()->~error_type();
559  }
560 
561  /// Return false if there is an error.
562  explicit operator bool() {
563#if LLVM_ENABLE_ABI_BREAKING_CHECKS0
564    Unchecked = HasError;
565#endif
566    return !HasError;
567  }
568 
569  /// Returns a reference to the stored T value.
570  reference get() {
571    assertIsChecked();
572    return *getStorage();
573  }
574 
575  /// Returns a const reference to the stored T value.
576  const_reference get() const {
577    assertIsChecked();
578    return const_cast<Expected<T> *>(this)->get();
579  }
580 
581  /// Check that this Expected<T> is an error of type ErrT.
582  template <typename ErrT> bool errorIsA() const {
583    return HasError && (*getErrorStorage())->template isA<ErrT>();
584  }
585 
586  /// Take ownership of the stored error.
587  /// After calling this the Expected<T> is in an indeterminate state that can
588  /// only be safely destructed. No further calls (beside the destructor) should
589  /// be made on the Expected<T> value.
590  Error takeError() {
591#if LLVM_ENABLE_ABI_BREAKING_CHECKS0
592    Unchecked = false;
593#endif
594    return HasError ? Error(std::move(*getErrorStorage())) : Error::success();
595  }
596 
597  /// Returns a pointer to the stored T value.
598  pointer operator->() {
599    assertIsChecked();
600    return toPointer(getStorage());
601  }
602 
603  /// Returns a const pointer to the stored T value.
604  const_pointer operator->() const {
605    assertIsChecked();
606    return toPointer(getStorage());
607  }
608 
609  /// Returns a reference to the stored T value.
610  reference operator*() {
611    assertIsChecked();
612    return *getStorage();
613  }
614 
615  /// Returns a const reference to the stored T value.
616  const_reference operator*() const {
617    assertIsChecked();
618    return *getStorage();
619  }
620 
621private:
622  template <class T1>
623  static bool compareThisIfSameType(const T1 &a, const T1 &b) {
624    return &a == &b;
625  }
626 
627  template <class T1, class T2>
628  static bool compareThisIfSameType(const T1 &, const T2 &) {
629    return false;
630  }
631 
632  template <class OtherT> void moveConstruct(Expected<OtherT> &&Other) {
633    HasError = Other.HasError;
634#if LLVM_ENABLE_ABI_BREAKING_CHECKS0
635    Unchecked = true;
636    Other.Unchecked = false;
637#endif
638 
639    if (!HasError)
640      new (getStorage()) storage_type(std::move(*Other.getStorage()));
641    else
642      new (getErrorStorage()) error_type(std::move(*Other.getErrorStorage()));
643  }
644 
645  template <class OtherT> void moveAssign(Expected<OtherT> &&Other) {
646    assertIsChecked();
647 
648    if (compareThisIfSameType(*this, Other))
649      return;
650 
651    this->~Expected();
652    new (this) Expected(std::move(Other));
653  }
654 
655  pointer toPointer(pointer Val) { return Val; }
656 
657  const_pointer toPointer(const_pointer Val) const { return Val; }
658 
659  pointer toPointer(wrap *Val) { return &Val->get(); }
660 
661  const_pointer toPointer(const wrap *Val) const { return &Val->get(); }
662 
663  storage_type *getStorage() {
664    assert(!HasError && "Cannot get value when an error exists!")((void)0);
665    return reinterpret_cast<storage_type *>(&TStorage);
666  }
667 
668  const storage_type *getStorage() const {
669    assert(!HasError && "Cannot get value when an error exists!")((void)0);
670    return reinterpret_cast<const storage_type *>(&TStorage);
671  }
672 
673  error_type *getErrorStorage() {
674    assert(HasError && "Cannot get error when a value exists!")((void)0);
675    return reinterpret_cast<error_type *>(&ErrorStorage);
676  }
677 
678  const error_type *getErrorStorage() const {
679    assert(HasError && "Cannot get error when a value exists!")((void)0);
680    return reinterpret_cast<const error_type *>(&ErrorStorage);
681  }
682 
683  // Used by ExpectedAsOutParameter to reset the checked flag.
684  void setUnchecked() {
685#if LLVM_ENABLE_ABI_BREAKING_CHECKS0
686    Unchecked = true;
687#endif
688  }
689 
690#if LLVM_ENABLE_ABI_BREAKING_CHECKS0
691  LLVM_ATTRIBUTE_NORETURN__attribute__((noreturn))
692  LLVM_ATTRIBUTE_NOINLINE__attribute__((noinline))
693  void fatalUncheckedExpected() const {
694    dbgs() << "Expected<T> must be checked before access or destruction.\n";
695    if (HasError) {
696      dbgs() << "Unchecked Expected<T> contained error:\n";
697      (*getErrorStorage())->log(dbgs());
698    } else
699      dbgs() << "Expected<T> value was in success state. (Note: Expected<T> "
700                "values in success mode must still be checked prior to being "
701                "destroyed).\n";
702    abort();
703  }
704#endif
705 
706  void assertIsChecked() const {
707#if LLVM_ENABLE_ABI_BREAKING_CHECKS0
708    if (LLVM_UNLIKELY(Unchecked)__builtin_expect((bool)(Unchecked), false))
709      fatalUncheckedExpected();
710#endif
711  }
712 
713  union {
714    AlignedCharArrayUnion<storage_type> TStorage;
715    AlignedCharArrayUnion<error_type> ErrorStorage;
716  };
717  bool HasError : 1;
718#if LLVM_ENABLE_ABI_BREAKING_CHECKS0
719  bool Unchecked : 1;
720#endif
721};
722 
723/// Report a serious error, calling any installed error handler. See
724/// ErrorHandling.h.
725LLVM_ATTRIBUTE_NORETURN__attribute__((noreturn)) void report_fatal_error(Error Err,
726                                                bool gen_crash_diag = true);
727 
728/// Report a fatal error if Err is a failure value.
729///
730/// This function can be used to wrap calls to fallible functions ONLY when it
731/// is known that the Error will always be a success value. E.g.
732///
733///   @code{.cpp}
734///   // foo only attempts the fallible operation if DoFallibleOperation is
735///   // true. If DoFallibleOperation is false then foo always returns
736///   // Error::success().
737///   Error foo(bool DoFallibleOperation);
738///
739///   cantFail(foo(false));
740///   @endcode
741inline void cantFail(Error Err, const char *Msg = nullptr) {
742  if (Err) {
743    if (!Msg)
744      Msg = "Failure value returned from cantFail wrapped call";
745#ifndef NDEBUG1
746    std::string Str;
747    raw_string_ostream OS(Str);
748    OS << Msg << "\n" << Err;
749    Msg = OS.str().c_str();
750#endif
751    llvm_unreachable(Msg)__builtin_unreachable();
752  }
753}
754 
755/// Report a fatal error if ValOrErr is a failure value, otherwise unwraps and
756/// returns the contained value.
757///
758/// This function can be used to wrap calls to fallible functions ONLY when it
759/// is known that the Error will always be a success value. E.g.
760///
761///   @code{.cpp}
762///   // foo only attempts the fallible operation if DoFallibleOperation is
763///   // true. If DoFallibleOperation is false then foo always returns an int.
764///   Expected<int> foo(bool DoFallibleOperation);
765///
766///   int X = cantFail(foo(false));
767///   @endcode
768template <typename T>
769T cantFail(Expected<T> ValOrErr, const char *Msg = nullptr) {
770  if (ValOrErr)
771    return std::move(*ValOrErr);
772  else {
773    if (!Msg)
774      Msg = "Failure value returned from cantFail wrapped call";
775#ifndef NDEBUG1
776    std::string Str;
777    raw_string_ostream OS(Str);
778    auto E = ValOrErr.takeError();
779    OS << Msg << "\n" << E;
780    Msg = OS.str().c_str();
781#endif
782    llvm_unreachable(Msg)__builtin_unreachable();
783  }
784}
785 
786/// Report a fatal error if ValOrErr is a failure value, otherwise unwraps and
787/// returns the contained reference.
788///
789/// This function can be used to wrap calls to fallible functions ONLY when it
790/// is known that the Error will always be a success value. E.g.
791///
792///   @code{.cpp}
793///   // foo only attempts the fallible operation if DoFallibleOperation is
794///   // true. If DoFallibleOperation is false then foo always returns a Bar&.
795///   Expected<Bar&> foo(bool DoFallibleOperation);
796///
797///   Bar &X = cantFail(foo(false));
798///   @endcode
799template <typename T>
800T& cantFail(Expected<T&> ValOrErr, const char *Msg = nullptr) {
801  if (ValOrErr)
802    return *ValOrErr;
803  else {
804    if (!Msg)
805      Msg = "Failure value returned from cantFail wrapped call";
806#ifndef NDEBUG1
807    std::string Str;
808    raw_string_ostream OS(Str);
809    auto E = ValOrErr.takeError();
810    OS << Msg << "\n" << E;
811    Msg = OS.str().c_str();
812#endif
813    llvm_unreachable(Msg)__builtin_unreachable();
814  }
815}
816 
817/// Helper for testing applicability of, and applying, handlers for
818/// ErrorInfo types.
819template <typename HandlerT>
820class ErrorHandlerTraits
821    : public ErrorHandlerTraits<decltype(
822          &std::remove_reference<HandlerT>::type::operator())> {};
823 
824// Specialization functions of the form 'Error (const ErrT&)'.
825template <typename ErrT> class ErrorHandlerTraits<Error (&)(ErrT &)> {
826public:
827  static bool appliesTo(const ErrorInfoBase &E) {
828    return E.template isA<ErrT>();
829  }
830 
831  template <typename HandlerT>
832  static Error apply(HandlerT &&H, std::unique_ptr<ErrorInfoBase> E) {
833    assert(appliesTo(*E) && "Applying incorrect handler")((void)0);
834    return H(static_cast<ErrT &>(*E));
835  }
836};
837 
838// Specialization functions of the form 'void (const ErrT&)'.
839template <typename ErrT> class ErrorHandlerTraits<void (&)(ErrT &)> {
840public:
841  static bool appliesTo(const ErrorInfoBase &E) {
842    return E.template isA<ErrT>();
843  }
844 
845  template <typename HandlerT>
846  static Error apply(HandlerT &&H, std::unique_ptr<ErrorInfoBase> E) {
847    assert(appliesTo(*E) && "Applying incorrect handler")((void)0);
848    H(static_cast<ErrT &>(*E));
849    return Error::success();
850  }
851};
852 
853/// Specialization for functions of the form 'Error (std::unique_ptr<ErrT>)'.
854template <typename ErrT>
855class ErrorHandlerTraits<Error (&)(std::unique_ptr<ErrT>)> {
856public:
857  static bool appliesTo(const ErrorInfoBase &E) {
858    return E.template isA<ErrT>();
859  }
860 
861  template <typename HandlerT>
862  static Error apply(HandlerT &&H, std::unique_ptr<ErrorInfoBase> E) {
863    assert(appliesTo(*E) && "Applying incorrect handler")((void)0);
864    std::unique_ptr<ErrT> SubE(static_cast<ErrT *>(E.release()));
865    return H(std::move(SubE));
866  }
867};
868 
869/// Specialization for functions of the form 'void (std::unique_ptr<ErrT>)'.
870template <typename ErrT>
871class ErrorHandlerTraits<void (&)(std::unique_ptr<ErrT>)> {
872public:
873  static bool appliesTo(const ErrorInfoBase &E) {
874    return E.template isA<ErrT>();
875  }
876 
877  template <typename HandlerT>
878  static Error apply(HandlerT &&H, std::unique_ptr<ErrorInfoBase> E) {
879    assert(appliesTo(*E) && "Applying incorrect handler")((void)0);
880    std::unique_ptr<ErrT> SubE(static_cast<ErrT *>(E.release()));
881    H(std::move(SubE));
882    return Error::success();
883  }
884};
885 
886// Specialization for member functions of the form 'RetT (const ErrT&)'.
887template <typename C, typename RetT, typename ErrT>
888class ErrorHandlerTraits<RetT (C::*)(ErrT &)>
889    : public ErrorHandlerTraits<RetT (&)(ErrT &)> {};
890 
891// Specialization for member functions of the form 'RetT (const ErrT&) const'.
892template <typename C, typename RetT, typename ErrT>
893class ErrorHandlerTraits<RetT (C::*)(ErrT &) const>
894    : public ErrorHandlerTraits<RetT (&)(ErrT &)> {};
895 
896// Specialization for member functions of the form 'RetT (const ErrT&)'.
897template <typename C, typename RetT, typename ErrT>
898class ErrorHandlerTraits<RetT (C::*)(const ErrT &)>
899    : public ErrorHandlerTraits<RetT (&)(ErrT &)> {};
900 
901// Specialization for member functions of the form 'RetT (const ErrT&) const'.
902template <typename C, typename RetT, typename ErrT>
903class ErrorHandlerTraits<RetT (C::*)(const ErrT &) const>
904    : public ErrorHandlerTraits<RetT (&)(ErrT &)> {};
905 
906/// Specialization for member functions of the form
907/// 'RetT (std::unique_ptr<ErrT>)'.
908template <typename C, typename RetT, typename ErrT>
909class ErrorHandlerTraits<RetT (C::*)(std::unique_ptr<ErrT>)>
910    : public ErrorHandlerTraits<RetT (&)(std::unique_ptr<ErrT>)> {};
911 
912/// Specialization for member functions of the form
913/// 'RetT (std::unique_ptr<ErrT>) const'.
914template <typename C, typename RetT, typename ErrT>
915class ErrorHandlerTraits<RetT (C::*)(std::unique_ptr<ErrT>) const>
916    : public ErrorHandlerTraits<RetT (&)(std::unique_ptr<ErrT>)> {};
917 
918inline Error handleErrorImpl(std::unique_ptr<ErrorInfoBase> Payload) {
919  return Error(std::move(Payload));
920}
921 
922template <typename HandlerT, typename... HandlerTs>
923Error handleErrorImpl(std::unique_ptr<ErrorInfoBase> Payload,
924                      HandlerT &&Handler, HandlerTs &&... Handlers) {
925  if (ErrorHandlerTraits<HandlerT>::appliesTo(*Payload))
926    return ErrorHandlerTraits<HandlerT>::apply(std::forward<HandlerT>(Handler),
927                                               std::move(Payload));
928  return handleErrorImpl(std::move(Payload),
929                         std::forward<HandlerTs>(Handlers)...);
930}
931 
932/// Pass the ErrorInfo(s) contained in E to their respective handlers. Any
933/// unhandled errors (or Errors returned by handlers) are re-concatenated and
934/// returned.
935/// Because this function returns an error, its result must also be checked
936/// or returned. If you intend to handle all errors use handleAllErrors
937/// (which returns void, and will abort() on unhandled errors) instead.
938template <typename... HandlerTs>
939Error handleErrors(Error E, HandlerTs &&... Hs) {
940  if (!E)
941    return Error::success();
942 
943  std::unique_ptr<ErrorInfoBase> Payload = E.takePayload();
944 
945  if (Payload->isA<ErrorList>()) {
946    ErrorList &List = static_cast<ErrorList &>(*Payload);
947    Error R;
948    for (auto &P : List.Payloads)
949      R = ErrorList::join(
950          std::move(R),
951          handleErrorImpl(std::move(P), std::forward<HandlerTs>(Hs)...));
952    return R;
953  }
954 
955  return handleErrorImpl(std::move(Payload), std::forward<HandlerTs>(Hs)...);
956}
957 
958/// Behaves the same as handleErrors, except that by contract all errors
959/// *must* be handled by the given handlers (i.e. there must be no remaining
960/// errors after running the handlers, or llvm_unreachable is called).
961template <typename... HandlerTs>
962void handleAllErrors(Error E, HandlerTs &&... Handlers) {
963  cantFail(handleErrors(std::move(E), std::forward<HandlerTs>(Handlers)...));
964}
965 
966/// Check that E is a non-error, then drop it.
967/// If E is an error, llvm_unreachable will be called.
968inline void handleAllErrors(Error E) {
969  cantFail(std::move(E));
970}
971 
972/// Handle any errors (if present) in an Expected<T>, then try a recovery path.
973///
974/// If the incoming value is a success value it is returned unmodified. If it
975/// is a failure value then it the contained error is passed to handleErrors.
976/// If handleErrors is able to handle the error then the RecoveryPath functor
977/// is called to supply the final result. If handleErrors is not able to
978/// handle all errors then the unhandled errors are returned.
979///
980/// This utility enables the follow pattern:
981///
982///   @code{.cpp}
983///   enum FooStrategy { Aggressive, Conservative };
984///   Expected<Foo> foo(FooStrategy S);
985///
986///   auto ResultOrErr =
987///     handleExpected(
988///       foo(Aggressive),
989///       []() { return foo(Conservative); },
990///       [](AggressiveStrategyError&) {
991///         // Implicitly conusme this - we'll recover by using a conservative
992///         // strategy.
993///       });
994///
995///   @endcode
996template <typename T, typename RecoveryFtor, typename... HandlerTs>
997Expected<T> handleExpected(Expected<T> ValOrErr, RecoveryFtor &&RecoveryPath,
998                           HandlerTs &&... Handlers) {
999  if (ValOrErr)
1000    return ValOrErr;
1001 
1002  if (auto Err = handleErrors(ValOrErr.takeError(),
1003                              std::forward<HandlerTs>(Handlers)...))
1004    return std::move(Err);
1005 
1006  return RecoveryPath();
1007}
1008 
1009/// Log all errors (if any) in E to OS. If there are any errors, ErrorBanner
1010/// will be printed before the first one is logged. A newline will be printed
1011/// after each error.
1012///
1013/// This function is compatible with the helpers from Support/WithColor.h. You
1014/// can pass any of them as the OS. Please consider using them instead of
1015/// including 'error: ' in the ErrorBanner.
1016///
1017/// This is useful in the base level of your program to allow clean termination
1018/// (allowing clean deallocation of resources, etc.), while reporting error
1019/// information to the user.
1020void logAllUnhandledErrors(Error E, raw_ostream &OS, Twine ErrorBanner = {});
1021 
1022/// Write all error messages (if any) in E to a string. The newline character
1023/// is used to separate error messages.
1024inline std::string toString(Error E) {
1025  SmallVector<std::string, 2> Errors;
1026  handleAllErrors(std::move(E), [&Errors](const ErrorInfoBase &EI) {
1027    Errors.push_back(EI.message());
1028  });
1029  return join(Errors.begin(), Errors.end(), "\n");
1030}
1031 
1032/// Consume a Error without doing anything. This method should be used
1033/// only where an error can be considered a reasonable and expected return
1034/// value.
1035///
1036/// Uses of this method are potentially indicative of design problems: If it's
1037/// legitimate to do nothing while processing an "error", the error-producer
1038/// might be more clearly refactored to return an Optional<T>.
1039inline void consumeError(Error Err) {
1040  handleAllErrors(std::move(Err), [](const ErrorInfoBase &) {});
1041}
1042 
1043/// Convert an Expected to an Optional without doing anything. This method
1044/// should be used only where an error can be considered a reasonable and
1045/// expected return value.
1046///
1047/// Uses of this method are potentially indicative of problems: perhaps the
1048/// error should be propagated further, or the error-producer should just
1049/// return an Optional in the first place.
1050template <typename T> Optional<T> expectedToOptional(Expected<T> &&E) {
1051  if (E)
1052    return std::move(*E);
1053  consumeError(E.takeError());
1054  return None;
1055}
1056 
1057/// Helper for converting an Error to a bool.
1058///
1059/// This method returns true if Err is in an error state, or false if it is
1060/// in a success state.  Puts Err in a checked state in both cases (unlike
1061/// Error::operator bool(), which only does this for success states).
1062inline bool errorToBool(Error Err) {
1063  bool IsError = static_cast<bool>(Err);
1064  if (IsError)
1065    consumeError(std::move(Err));
1066  return IsError;
1067}
1068 
1069/// Helper for Errors used as out-parameters.
1070///
1071/// This helper is for use with the Error-as-out-parameter idiom, where an error
1072/// is passed to a function or method by reference, rather than being returned.
1073/// In such cases it is helpful to set the checked bit on entry to the function
1074/// so that the error can be written to (unchecked Errors abort on assignment)
1075/// and clear the checked bit on exit so that clients cannot accidentally forget
1076/// to check the result. This helper performs these actions automatically using
1077/// RAII:
1078///
1079///   @code{.cpp}
1080///   Result foo(Error &Err) {
1081///     ErrorAsOutParameter ErrAsOutParam(&Err); // 'Checked' flag set
1082///     // <body of foo>
1083///     // <- 'Checked' flag auto-cleared when ErrAsOutParam is destructed.
1084///   }
1085///   @endcode
1086///
1087/// ErrorAsOutParameter takes an Error* rather than Error& so that it can be
1088/// used with optional Errors (Error pointers that are allowed to be null). If
1089/// ErrorAsOutParameter took an Error reference, an instance would have to be
1090/// created inside every condition that verified that Error was non-null. By
1091/// taking an Error pointer we can just create one instance at the top of the
1092/// function.
1093class ErrorAsOutParameter {
1094public:
1095  ErrorAsOutParameter(Error *Err) : Err(Err) {
1096    // Raise the checked bit if Err is success.
1097    if (Err)
1098      (void)!!*Err;
1099  }
1100 
1101  ~ErrorAsOutParameter() {
1102    // Clear the checked bit.
1103    if (Err && !*Err)
1104      *Err = Error::success();
1105  }
1106 
1107private:
1108  Error *Err;
1109};
1110 
1111/// Helper for Expected<T>s used as out-parameters.
1112///
1113/// See ErrorAsOutParameter.
1114template <typename T>
1115class ExpectedAsOutParameter {
1116public:
1117  ExpectedAsOutParameter(Expected<T> *ValOrErr)
1118    : ValOrErr(ValOrErr) {
1119    if (ValOrErr)
1120      (void)!!*ValOrErr;
1121  }
1122 
1123  ~ExpectedAsOutParameter() {
1124    if (ValOrErr)
1125      ValOrErr->setUnchecked();
1126  }
1127 
1128private:
1129  Expected<T> *ValOrErr;
1130};
1131 
1132/// This class wraps a std::error_code in a Error.
1133///
1134/// This is useful if you're writing an interface that returns a Error
1135/// (or Expected) and you want to call code that still returns
1136/// std::error_codes.
1137class ECError : public ErrorInfo<ECError> {
1138  friend Error errorCodeToError(std::error_code);
1139 
1140  virtual void anchor() override;
1141 
1142public:
1143  void setErrorCode(std::error_code EC) { this->EC = EC; }
1144  std::error_code convertToErrorCode() const override { return EC; }
1145  void log(raw_ostream &OS) const override { OS << EC.message(); }
1146 
1147  // Used by ErrorInfo::classID.
1148  static char ID;
1149 
1150protected:
1151  ECError() = default;
1152  ECError(std::error_code EC) : EC(EC) {}
1153 
1154  std::error_code EC;
1155};
1156 
1157/// The value returned by this function can be returned from convertToErrorCode
1158/// for Error values where no sensible translation to std::error_code exists.
1159/// It should only be used in this situation, and should never be used where a
1160/// sensible conversion to std::error_code is available, as attempts to convert
1161/// to/from this error will result in a fatal error. (i.e. it is a programmatic
1162///error to try to convert such a value).
1163std::error_code inconvertibleErrorCode();
1164 
1165/// Helper for converting an std::error_code to a Error.
1166Error errorCodeToError(std::error_code EC);
1167 
1168/// Helper for converting an ECError to a std::error_code.
1169///
1170/// This method requires that Err be Error() or an ECError, otherwise it
1171/// will trigger a call to abort().
1172std::error_code errorToErrorCode(Error Err);
1173 
1174/// Convert an ErrorOr<T> to an Expected<T>.
1175template <typename T> Expected<T> errorOrToExpected(ErrorOr<T> &&EO) {
1176  if (auto EC = EO.getError())
1177    return errorCodeToError(EC);
1178  return std::move(*EO);
1179}
1180 
1181/// Convert an Expected<T> to an ErrorOr<T>.
1182template <typename T> ErrorOr<T> expectedToErrorOr(Expected<T> &&E) {
1183  if (auto Err = E.takeError())
1184    return errorToErrorCode(std::move(Err));
1185  return std::move(*E);
1186}
1187 
1188/// This class wraps a string in an Error.
1189///
1190/// StringError is useful in cases where the client is not expected to be able
1191/// to consume the specific error message programmatically (for example, if the
1192/// error message is to be presented to the user).
1193///
1194/// StringError can also be used when additional information is to be printed
1195/// along with a error_code message. Depending on the constructor called, this
1196/// class can either display:
1197///    1. the error_code message (ECError behavior)
1198///    2. a string
1199///    3. the error_code message and a string
1200///
1201/// These behaviors are useful when subtyping is required; for example, when a
1202/// specific library needs an explicit error type. In the example below,
1203/// PDBError is derived from StringError:
1204///
1205///   @code{.cpp}
1206///   Expected<int> foo() {
1207///      return llvm::make_error<PDBError>(pdb_error_code::dia_failed_loading,
1208///                                        "Additional information");
1209///   }
1210///   @endcode
1211///
1212class StringError : public ErrorInfo<StringError> {
1213public:
1214  static char ID;
1215 
1216  // Prints EC + S and converts to EC
1217  StringError(std::error_code EC, const Twine &S = Twine());
1218 
1219  // Prints S and converts to EC
1220  StringError(const Twine &S, std::error_code EC);
1221 
1222  void log(raw_ostream &OS) const override;
1223  std::error_code convertToErrorCode() const override;
1224 
1225  const std::string &getMessage() const { return Msg; }
1226 
1227private:
1228  std::string Msg;
1229  std::error_code EC;
1230  const bool PrintMsgOnly = false;
1231};
1232 
1233/// Create formatted StringError object.
1234template <typename... Ts>
1235inline Error createStringError(std::error_code EC, char const *Fmt,
1236                               const Ts &... Vals) {
1237  std::string Buffer;
1238  raw_string_ostream Stream(Buffer);
1239  Stream << format(Fmt, Vals...);
1240  return make_error<StringError>(Stream.str(), EC);
1241}
1242 
1243Error createStringError(std::error_code EC, char const *Msg);
1244 
1245inline Error createStringError(std::error_code EC, const Twine &S) {
1246  return createStringError(EC, S.str().c_str());
1247}
1248 
1249template <typename... Ts>
1250inline Error createStringError(std::errc EC, char const *Fmt,
1251                               const Ts &... Vals) {
1252  return createStringError(std::make_error_code(EC), Fmt, Vals...);
1253}
1254 
1255/// This class wraps a filename and another Error.
1256///
1257/// In some cases, an error needs to live along a 'source' name, in order to
1258/// show more detailed information to the user.
1259class FileError final : public ErrorInfo<FileError> {
1260 
1261  friend Error createFileError(const Twine &, Error);
1262  friend Error createFileError(const Twine &, size_t, Error);
1263 
1264public:
1265  void log(raw_ostream &OS) const override {
1266    assert(Err && !FileName.empty() && "Trying to log after takeError().")((void)0);
1267    OS << "'" << FileName << "': ";
1268    if (Line.hasValue())
1269      OS << "line " << Line.getValue() << ": ";
1270    Err->log(OS);
1271  }
1272 
1273  StringRef getFileName() { return FileName; }
1274 
1275  Error takeError() { return Error(std::move(Err)); }
1276 
1277  std::error_code convertToErrorCode() const override;
1278 
1279  // Used by ErrorInfo::classID.
1280  static char ID;
1281 
1282private:
1283  FileError(const Twine &F, Optional<size_t> LineNum,
1284            std::unique_ptr<ErrorInfoBase> E) {
1285    assert(E && "Cannot create FileError from Error success value.")((void)0);
1286    assert(!F.isTriviallyEmpty() &&((void)0)
1287           "The file name provided to FileError must not be empty.")((void)0);
1288    FileName = F.str();
1289    Err = std::move(E);
1290    Line = std::move(LineNum);
1291  }
1292 
1293  static Error build(const Twine &F, Optional<size_t> Line, Error E) {
1294    std::unique_ptr<ErrorInfoBase> Payload;
1295    handleAllErrors(std::move(E),
1296                    [&](std::unique_ptr<ErrorInfoBase> EIB) -> Error {
1297                      Payload = std::move(EIB);
1298                      return Error::success();
1299                    });
1300    return Error(
1301        std::unique_ptr<FileError>(new FileError(F, Line, std::move(Payload))));
1302  }
1303 
1304  std::string FileName;
1305  Optional<size_t> Line;
1306  std::unique_ptr<ErrorInfoBase> Err;
1307};
1308 
1309/// Concatenate a source file path and/or name with an Error. The resulting
1310/// Error is unchecked.
1311inline Error createFileError(const Twine &F, Error E) {
1312  return FileError::build(F, Optional<size_t>(), std::move(E));
1313}
1314 
1315/// Concatenate a source file path and/or name with line number and an Error.
1316/// The resulting Error is unchecked.
1317inline Error createFileError(const Twine &F, size_t Line, Error E) {
1318  return FileError::build(F, Optional<size_t>(Line), std::move(E));
1319}
1320 
1321/// Concatenate a source file path and/or name with a std::error_code 
1322/// to form an Error object.
1323inline Error createFileError(const Twine &F, std::error_code EC) {
1324  return createFileError(F, errorCodeToError(EC));
1325}
1326 
1327/// Concatenate a source file path and/or name with line number and
1328/// std::error_code to form an Error object.
1329inline Error createFileError(const Twine &F, size_t Line, std::error_code EC) {
1330  return createFileError(F, Line, errorCodeToError(EC));
1331}
1332 
1333Error createFileError(const Twine &F, ErrorSuccess) = delete;
1334 
1335/// Helper for check-and-exit error handling.
1336///
1337/// For tool use only. NOT FOR USE IN LIBRARY CODE.
1338///
1339class ExitOnError {
1340public:
1341  /// Create an error on exit helper.
1342  ExitOnError(std::string Banner = "", int DefaultErrorExitCode = 1)
1343      : Banner(std::move(Banner)),
1344        GetExitCode([=](const Error &) { return DefaultErrorExitCode; }) {}
1345 
1346  /// Set the banner string for any errors caught by operator().
1347  void setBanner(std::string Banner) { this->Banner = std::move(Banner); }
1348 
1349  /// Set the exit-code mapper function.
1350  void setExitCodeMapper(std::function<int(const Error &)> GetExitCode) {
1351    this->GetExitCode = std::move(GetExitCode);
1352  }
1353 
1354  /// Check Err. If it's in a failure state log the error(s) and exit.
1355  void operator()(Error Err) const { checkError(std::move(Err)); }
1356 
1357  /// Check E. If it's in a success state then return the contained value. If
1358  /// it's in a failure state log the error(s) and exit.
1359  template <typename T> T operator()(Expected<T> &&E) const {
1360    checkError(E.takeError());
1361    return std::move(*E);
1362  }
1363 
1364  /// Check E. If it's in a success state then return the contained reference. If
1365  /// it's in a failure state log the error(s) and exit.
1366  template <typename T> T& operator()(Expected<T&> &&E) const {
1367    checkError(E.takeError());
1368    return *E;
1369  }
1370 
1371private:
1372  void checkError(Error Err) const {
1373    if (Err) {
1374      int ExitCode = GetExitCode(Err);
1375      logAllUnhandledErrors(std::move(Err), errs(), Banner);
1376      exit(ExitCode);
1377    }
1378  }
1379 
1380  std::string Banner;
1381  std::function<int(const Error &)> GetExitCode;
1382};
1383 
1384/// Conversion from Error to LLVMErrorRef for C error bindings.
1385inline LLVMErrorRef wrap(Error Err) {
1386  return reinterpret_cast<LLVMErrorRef>(Err.takePayload().release());
1387}
1388 
1389/// Conversion from LLVMErrorRef to Error for C error bindings.
1390inline Error unwrap(LLVMErrorRef ErrRef) {
1391  return Error(std::unique_ptr<ErrorInfoBase>(
1392      reinterpret_cast<ErrorInfoBase *>(ErrRef)));
1393}
1394 
1395} // end namespace llvm
1396 
1397#endif // LLVM_SUPPORT_ERROR_H