/build/source/clang/lib/AST/Expr.cpp

Bug Summary

File:	build/source/clang/lib/AST/Expr.cpp
Warning:	line 911, column 7 Called C++ object pointer is null
Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name Expr.cpp -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 -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mframe-pointer=none -relaxed-aliasing -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/build/source/build-llvm -resource-dir /usr/lib/llvm-17/lib/clang/17 -D _DEBUG -D _GLIBCXX_ASSERTIONS -D _GNU_SOURCE -D _LIBCPP_ENABLE_ASSERTIONS -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I tools/clang/lib/AST -I /build/source/clang/lib/AST -I /build/source/clang/include -I tools/clang/include -I include -I /build/source/llvm/include -D _FORTIFY_SOURCE=2 -D NDEBUG -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/x86_64-linux-gnu/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/backward -internal-isystem /usr/lib/llvm-17/lib/clang/17/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fmacro-prefix-map=/build/source/build-llvm=build-llvm -fmacro-prefix-map=/build/source/= -fcoverage-prefix-map=/build/source/build-llvm=build-llvm -fcoverage-prefix-map=/build/source/= -source-date-epoch 1680300532 -O3 -Wno-unused-command-line-argument -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wno-comment -Wno-misleading-indentation -std=c++17 -fdeprecated-macro -fdebug-compilation-dir=/build/source/build-llvm -fdebug-prefix-map=/build/source/build-llvm=build-llvm -fdebug-prefix-map=/build/source/= -fdebug-prefix-map=/build/source/build-llvm=build-llvm -fdebug-prefix-map=/build/source/= -ferror-limit 19 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fcolor-diagnostics -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2023-04-01-083001-16331-1 -x c++ /build/source/clang/lib/AST/Expr.cpp
1//===--- Expr.cpp - Expression AST Node Implementation --------------------===//
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 implements the Expr class and subclasses.
10//
11//===----------------------------------------------------------------------===//

13#include "clang/AST/Expr.h"
14#include "clang/AST/APValue.h"
15#include "clang/AST/ASTContext.h"
16#include "clang/AST/Attr.h"
17#include "clang/AST/ComputeDependence.h"
18#include "clang/AST/DeclCXX.h"
19#include "clang/AST/DeclObjC.h"
20#include "clang/AST/DeclTemplate.h"
21#include "clang/AST/DependenceFlags.h"
22#include "clang/AST/EvaluatedExprVisitor.h"
23#include "clang/AST/ExprCXX.h"
24#include "clang/AST/IgnoreExpr.h"
25#include "clang/AST/Mangle.h"
26#include "clang/AST/RecordLayout.h"
27#include "clang/AST/StmtVisitor.h"
28#include "clang/Basic/Builtins.h"
29#include "clang/Basic/CharInfo.h"
30#include "clang/Basic/SourceManager.h"
31#include "clang/Basic/TargetInfo.h"
32#include "clang/Lex/Lexer.h"
33#include "clang/Lex/LiteralSupport.h"
34#include "clang/Lex/Preprocessor.h"
35#include "llvm/Support/ErrorHandling.h"
36#include "llvm/Support/Format.h"
37#include "llvm/Support/raw_ostream.h"
38#include <algorithm>
39#include <cstring>
40#include <optional>
41using namespace clang;

43const Expr *Expr::getBestDynamicClassTypeExpr() const {
const Expr *E = this;
while (true) {
  E = E->IgnoreParenBaseCasts();

  // Follow the RHS of a comma operator.
  if (auto *BO = dyn_cast<BinaryOperator>(E)) {
    if (BO->getOpcode() == BO_Comma) {
      E = BO->getRHS();
      continue;
    }
  }

  // Step into initializer for materialized temporaries.
  if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(E)) {
    E = MTE->getSubExpr();
    continue;
  }

  break;
}

return E;
66}

68const CXXRecordDecl *Expr::getBestDynamicClassType() const {
const Expr *E = getBestDynamicClassTypeExpr();
QualType DerivedType = E->getType();
if (const PointerType *PTy = DerivedType->getAs<PointerType>())
  DerivedType = PTy->getPointeeType();

if (DerivedType->isDependentType())
  return nullptr;

const RecordType *Ty = DerivedType->castAs<RecordType>();
Decl *D = Ty->getDecl();
return cast<CXXRecordDecl>(D);
80}

82const Expr *Expr::skipRValueSubobjectAdjustments(
  SmallVectorImpl<const Expr *> &CommaLHSs,
  SmallVectorImpl<SubobjectAdjustment> &Adjustments) const {
const Expr *E = this;
while (true) {
  E = E->IgnoreParens();

  if (const CastExpr *CE = dyn_cast<CastExpr>(E)) {
    if ((CE->getCastKind() == CK_DerivedToBase ||
         CE->getCastKind() == CK_UncheckedDerivedToBase) &&
        E->getType()->isRecordType()) {
      E = CE->getSubExpr();
      auto *Derived =
          cast<CXXRecordDecl>(E->getType()->castAs<RecordType>()->getDecl());
      Adjustments.push_back(SubobjectAdjustment(CE, Derived));
      continue;
    }

    if (CE->getCastKind() == CK_NoOp) {
      E = CE->getSubExpr();
      continue;
    }
  } else if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) {
    if (!ME->isArrow()) {
      assert(ME->getBase()->getType()->isRecordType())(static_cast <bool> (ME->getBase()->getType()->
isRecordType()) ? void (0) : __assert_fail ("ME->getBase()->getType()->isRecordType()"
, "clang/lib/AST/Expr.cpp", 106, __extension__ __PRETTY_FUNCTION__
));
      if (FieldDecl *Field = dyn_cast<FieldDecl>(ME->getMemberDecl())) {
        if (!Field->isBitField() && !Field->getType()->isReferenceType()) {
          E = ME->getBase();
          Adjustments.push_back(SubobjectAdjustment(Field));
          continue;
        }
      }
    }
  } else if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
    if (BO->getOpcode() == BO_PtrMemD) {
      assert(BO->getRHS()->isPRValue())(static_cast <bool> (BO->getRHS()->isPRValue()) ?
 void (0) : __assert_fail ("BO->getRHS()->isPRValue()",
 "clang/lib/AST/Expr.cpp", 117, __extension__ __PRETTY_FUNCTION__
));
      E = BO->getLHS();
      const MemberPointerType *MPT =
        BO->getRHS()->getType()->getAs<MemberPointerType>();
      Adjustments.push_back(SubobjectAdjustment(MPT, BO->getRHS()));
      continue;
    }
    if (BO->getOpcode() == BO_Comma) {
      CommaLHSs.push_back(BO->getLHS());
      E = BO->getRHS();
      continue;
    }
  }

  // Nothing changed.
  break;
}
return E;
135}

137bool Expr::isKnownToHaveBooleanValue(bool Semantic) const {
const Expr *E = IgnoreParens();

// If this value has _Bool type, it is obvious 0/1.
if (E->getType()->isBooleanType()) return true;
// If this is a non-scalar-integer type, we don't care enough to try.
if (!E->getType()->isIntegralOrEnumerationType()) return false;

if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) {
  switch (UO->getOpcode()) {
  case UO_Plus:
    return UO->getSubExpr()->isKnownToHaveBooleanValue(Semantic);
  case UO_LNot:
    return true;
  default:
    return false;
  }
}

// Only look through implicit casts.  If the user writes
// '(int) (a && b)' treat it as an arbitrary int.
// FIXME: Should we look through any cast expression in !Semantic mode?
if (const ImplicitCastExpr *CE = dyn_cast<ImplicitCastExpr>(E))
  return CE->getSubExpr()->isKnownToHaveBooleanValue(Semantic);

if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
  switch (BO->getOpcode()) {
  default: return false;
  case BO_LT:   // Relational operators.
  case BO_GT:
  case BO_LE:
  case BO_GE:
  case BO_EQ:   // Equality operators.
  case BO_NE:
  case BO_LAnd: // AND operator.
  case BO_LOr:  // Logical OR operator.
    return true;

  case BO_And:  // Bitwise AND operator.
  case BO_Xor:  // Bitwise XOR operator.
  case BO_Or:   // Bitwise OR operator.
    // Handle things like (x==2)|(y==12).
    return BO->getLHS()->isKnownToHaveBooleanValue(Semantic) &&
           BO->getRHS()->isKnownToHaveBooleanValue(Semantic);

  case BO_Comma:
  case BO_Assign:
    return BO->getRHS()->isKnownToHaveBooleanValue(Semantic);
  }
}

if (const ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E))
  return CO->getTrueExpr()->isKnownToHaveBooleanValue(Semantic) &&
         CO->getFalseExpr()->isKnownToHaveBooleanValue(Semantic);

if (isa<ObjCBoolLiteralExpr>(E))
  return true;

if (const auto *OVE = dyn_cast<OpaqueValueExpr>(E))
  return OVE->getSourceExpr()->isKnownToHaveBooleanValue(Semantic);

if (const FieldDecl *FD = E->getSourceBitField())
  if (!Semantic && FD->getType()->isUnsignedIntegerType() &&
      !FD->getBitWidth()->isValueDependent() &&
      FD->getBitWidthValue(FD->getASTContext()) == 1)
    return true;

return false;
205}

207bool Expr::isFlexibleArrayMemberLike(
  ASTContext &Context,
  LangOptions::StrictFlexArraysLevelKind StrictFlexArraysLevel,
  bool IgnoreTemplateOrMacroSubstitution) const {

// For compatibility with existing code, we treat arrays of length 0 or
// 1 as flexible array members.
const auto *CAT = Context.getAsConstantArrayType(getType());
if (CAT) {
  llvm::APInt Size = CAT->getSize();

  using FAMKind = LangOptions::StrictFlexArraysLevelKind;

  if (StrictFlexArraysLevel == FAMKind::IncompleteOnly)
    return false;

  // GCC extension, only allowed to represent a FAM.
  if (Size == 0)
    return true;

  if (StrictFlexArraysLevel == FAMKind::ZeroOrIncomplete && Size.uge(1))
    return false;

  if (StrictFlexArraysLevel == FAMKind::OneZeroOrIncomplete && Size.uge(2))
    return false;
} else if (!Context.getAsIncompleteArrayType(getType()))
  return false;

const Expr *E = IgnoreParens();

const NamedDecl *ND = nullptr;
if (const auto *DRE = dyn_cast<DeclRefExpr>(E))
  ND = DRE->getDecl();
else if (const auto *ME = dyn_cast<MemberExpr>(E))
  ND = ME->getMemberDecl();
else if (const auto *IRE = dyn_cast<ObjCIvarRefExpr>(E))
  return IRE->getDecl()->getNextIvar() == nullptr;

if (!ND)
  return false;

// A flexible array member must be the last member in the class.
// FIXME: If the base type of the member expr is not FD->getParent(),
// this should not be treated as a flexible array member access.
if (const auto *FD = dyn_cast<FieldDecl>(ND)) {
  // GCC treats an array memeber of a union as an FAM if the size is one or
  // zero.
  if (CAT) {
    llvm::APInt Size = CAT->getSize();
    if (FD->getParent()->isUnion() && (Size.isZero() || Size.isOne()))
      return true;
  }

  // Don't consider sizes resulting from macro expansions or template argument
  // substitution to form C89 tail-padded arrays.
  if (IgnoreTemplateOrMacroSubstitution) {
    TypeSourceInfo *TInfo = FD->getTypeSourceInfo();
    while (TInfo) {
      TypeLoc TL = TInfo->getTypeLoc();
      // Look through typedefs.
      if (TypedefTypeLoc TTL = TL.getAsAdjusted<TypedefTypeLoc>()) {
        const TypedefNameDecl *TDL = TTL.getTypedefNameDecl();
        TInfo = TDL->getTypeSourceInfo();
        continue;
      }
      if (ConstantArrayTypeLoc CTL = TL.getAs<ConstantArrayTypeLoc>()) {
        const Expr *SizeExpr = dyn_cast<IntegerLiteral>(CTL.getSizeExpr());
        if (!SizeExpr || SizeExpr->getExprLoc().isMacroID())
          return false;
      }
      break;
    }
  }

  RecordDecl::field_iterator FI(
      DeclContext::decl_iterator(const_cast<FieldDecl *>(FD)));
  return ++FI == FD->getParent()->field_end();
}

return false;
287}

289const ValueDecl *
290Expr::getAsBuiltinConstantDeclRef(const ASTContext &Context) const {
Expr::EvalResult Eval;

if (EvaluateAsConstantExpr(Eval, Context)) {
  APValue &Value = Eval.Val;

  if (Value.isMemberPointer())
    return Value.getMemberPointerDecl();

  if (Value.isLValue() && Value.getLValueOffset().isZero())
    return Value.getLValueBase().dyn_cast<const ValueDecl *>();
}

return nullptr;
304}

306// Amusing macro metaprogramming hack: check whether a class provides
307// a more specific implementation of getExprLoc().
308//
309// See also Stmt.cpp:{getBeginLoc(),getEndLoc()}.
310namespace {
/// This implementation is used when a class provides a custom
/// implementation of getExprLoc.
template <class E, class T>
SourceLocation getExprLocImpl(const Expr *expr,
                              SourceLocation (T::*v)() const) {
  return static_cast<const E*>(expr)->getExprLoc();
}

/// This implementation is used when a class doesn't provide
/// a custom implementation of getExprLoc.  Overload resolution
/// should pick it over the implementation above because it's
/// more specialized according to function template partial ordering.
template <class E>
SourceLocation getExprLocImpl(const Expr *expr,
                              SourceLocation (Expr::*v)() const) {
  return static_cast<const E *>(expr)->getBeginLoc();
}
328}

330SourceLocation Expr::getExprLoc() const {
switch (getStmtClass()) {
case Stmt::NoStmtClass: llvm_unreachable("statement without class")::llvm::llvm_unreachable_internal("statement without class", "clang/lib/AST/Expr.cpp"
, 332);
333#define ABSTRACT_STMT(type)
334#define STMT(type, base) \
case Stmt::type##Class: break;
336#define EXPR(type, base) \
case Stmt::type##Class: return getExprLocImpl<type>(this, &type::getExprLoc);
338#include "clang/AST/StmtNodes.inc"
}
llvm_unreachable("unknown expression kind")::llvm::llvm_unreachable_internal("unknown expression kind", "clang/lib/AST/Expr.cpp"
, 340);
341}

343//===----------------------------------------------------------------------===//
344// Primary Expressions.
345//===----------------------------------------------------------------------===//

347static void AssertResultStorageKind(ConstantExpr::ResultStorageKind Kind) {
assert((Kind == ConstantExpr::RSK_APValue ||(static_cast <bool> ((Kind == ConstantExpr::RSK_APValue
 || Kind == ConstantExpr::RSK_Int64 || Kind == ConstantExpr::
RSK_None) && "Invalid StorageKind Value") ? void (0) :
 __assert_fail ("(Kind == ConstantExpr::RSK_APValue || Kind == ConstantExpr::RSK_Int64 || Kind == ConstantExpr::RSK_None) && \"Invalid StorageKind Value\""
, "clang/lib/AST/Expr.cpp", 350, __extension__ __PRETTY_FUNCTION__
))
        Kind == ConstantExpr::RSK_Int64 || Kind == ConstantExpr::RSK_None) &&(static_cast <bool> ((Kind == ConstantExpr::RSK_APValue
 || Kind == ConstantExpr::RSK_Int64 || Kind == ConstantExpr::
RSK_None) && "Invalid StorageKind Value") ? void (0) :
 __assert_fail ("(Kind == ConstantExpr::RSK_APValue || Kind == ConstantExpr::RSK_Int64 || Kind == ConstantExpr::RSK_None) && \"Invalid StorageKind Value\""
, "clang/lib/AST/Expr.cpp", 350, __extension__ __PRETTY_FUNCTION__
))
       "Invalid StorageKind Value")(static_cast <bool> ((Kind == ConstantExpr::RSK_APValue
 || Kind == ConstantExpr::RSK_Int64 || Kind == ConstantExpr::
RSK_None) && "Invalid StorageKind Value") ? void (0) :
 __assert_fail ("(Kind == ConstantExpr::RSK_APValue || Kind == ConstantExpr::RSK_Int64 || Kind == ConstantExpr::RSK_None) && \"Invalid StorageKind Value\""
, "clang/lib/AST/Expr.cpp", 350, __extension__ __PRETTY_FUNCTION__
));
(void)Kind;
352}

354ConstantExpr::ResultStorageKind
355ConstantExpr::getStorageKind(const APValue &Value) {
switch (Value.getKind()) {
case APValue::None:
case APValue::Indeterminate:
  return ConstantExpr::RSK_None;
case APValue::Int:
  if (!Value.getInt().needsCleanup())
    return ConstantExpr::RSK_Int64;
  [[fallthrough]];
default:
  return ConstantExpr::RSK_APValue;
}
367}

369ConstantExpr::ResultStorageKind
370ConstantExpr::getStorageKind(const Type *T, const ASTContext &Context) {
if (T->isIntegralOrEnumerationType() && Context.getTypeInfo(T).Width <= 64)
  return ConstantExpr::RSK_Int64;
return ConstantExpr::RSK_APValue;
374}

376ConstantExpr::ConstantExpr(Expr *SubExpr, ResultStorageKind StorageKind,
                         bool IsImmediateInvocation)
  : FullExpr(ConstantExprClass, SubExpr) {
ConstantExprBits.ResultKind = StorageKind;
ConstantExprBits.APValueKind = APValue::None;
ConstantExprBits.IsUnsigned = false;
ConstantExprBits.BitWidth = 0;
ConstantExprBits.HasCleanup = false;
ConstantExprBits.IsImmediateInvocation = IsImmediateInvocation;

if (StorageKind == ConstantExpr::RSK_APValue)
  ::new (getTrailingObjects<APValue>()) APValue();
388}

390ConstantExpr *ConstantExpr::Create(const ASTContext &Context, Expr *E,
                                 ResultStorageKind StorageKind,
                                 bool IsImmediateInvocation) {
assert(!isa<ConstantExpr>(E))(static_cast <bool> (!isa<ConstantExpr>(E)) ? void
 (0) : __assert_fail ("!isa<ConstantExpr>(E)", "clang/lib/AST/Expr.cpp"
, 393, __extension__ __PRETTY_FUNCTION__));
AssertResultStorageKind(StorageKind);

unsigned Size = totalSizeToAlloc<APValue, uint64_t>(
    StorageKind == ConstantExpr::RSK_APValue,
    StorageKind == ConstantExpr::RSK_Int64);
void *Mem = Context.Allocate(Size, alignof(ConstantExpr));
return new (Mem) ConstantExpr(E, StorageKind, IsImmediateInvocation);
401}

403ConstantExpr *ConstantExpr::Create(const ASTContext &Context, Expr *E,
                                 const APValue &Result) {
ResultStorageKind StorageKind = getStorageKind(Result);
ConstantExpr *Self = Create(Context, E, StorageKind);
Self->SetResult(Result, Context);
return Self;
409}

411ConstantExpr::ConstantExpr(EmptyShell Empty, ResultStorageKind StorageKind)
  : FullExpr(ConstantExprClass, Empty) {
ConstantExprBits.ResultKind = StorageKind;

if (StorageKind == ConstantExpr::RSK_APValue)
  ::new (getTrailingObjects<APValue>()) APValue();
417}

419ConstantExpr *ConstantExpr::CreateEmpty(const ASTContext &Context,
                                      ResultStorageKind StorageKind) {
AssertResultStorageKind(StorageKind);

unsigned Size = totalSizeToAlloc<APValue, uint64_t>(
    StorageKind == ConstantExpr::RSK_APValue,
    StorageKind == ConstantExpr::RSK_Int64);
void *Mem = Context.Allocate(Size, alignof(ConstantExpr));
return new (Mem) ConstantExpr(EmptyShell(), StorageKind);
428}

430void ConstantExpr::MoveIntoResult(APValue &Value, const ASTContext &Context) {
assert((unsigned)getStorageKind(Value) <= ConstantExprBits.ResultKind &&(static_cast <bool> ((unsigned)getStorageKind(Value) <=
 ConstantExprBits.ResultKind && "Invalid storage for this value kind"
) ? void (0) : __assert_fail ("(unsigned)getStorageKind(Value) <= ConstantExprBits.ResultKind && \"Invalid storage for this value kind\""
, "clang/lib/AST/Expr.cpp", 432, __extension__ __PRETTY_FUNCTION__
))
       "Invalid storage for this value kind")(static_cast <bool> ((unsigned)getStorageKind(Value) <=
 ConstantExprBits.ResultKind && "Invalid storage for this value kind"
) ? void (0) : __assert_fail ("(unsigned)getStorageKind(Value) <= ConstantExprBits.ResultKind && \"Invalid storage for this value kind\""
, "clang/lib/AST/Expr.cpp", 432, __extension__ __PRETTY_FUNCTION__
));
ConstantExprBits.APValueKind = Value.getKind();
switch (ConstantExprBits.ResultKind) {
case RSK_None:
  return;
case RSK_Int64:
  Int64Result() = *Value.getInt().getRawData();
  ConstantExprBits.BitWidth = Value.getInt().getBitWidth();
  ConstantExprBits.IsUnsigned = Value.getInt().isUnsigned();
  return;
case RSK_APValue:
  if (!ConstantExprBits.HasCleanup && Value.needsCleanup()) {
    ConstantExprBits.HasCleanup = true;
    Context.addDestruction(&APValueResult());
  }
  APValueResult() = std::move(Value);
  return;
}
llvm_unreachable("Invalid ResultKind Bits")::llvm::llvm_unreachable_internal("Invalid ResultKind Bits", "clang/lib/AST/Expr.cpp"
, 450);
451}

453llvm::APSInt ConstantExpr::getResultAsAPSInt() const {
switch (ConstantExprBits.ResultKind) {
case ConstantExpr::RSK_APValue:
  return APValueResult().getInt();
case ConstantExpr::RSK_Int64:
  return llvm::APSInt(llvm::APInt(ConstantExprBits.BitWidth, Int64Result()),
                      ConstantExprBits.IsUnsigned);
default:
  llvm_unreachable("invalid Accessor")::llvm::llvm_unreachable_internal("invalid Accessor", "clang/lib/AST/Expr.cpp"
, 461);
}
463}

465APValue ConstantExpr::getAPValueResult() const {

switch (ConstantExprBits.ResultKind) {
case ConstantExpr::RSK_APValue:
  return APValueResult();
case ConstantExpr::RSK_Int64:
  return APValue(
      llvm::APSInt(llvm::APInt(ConstantExprBits.BitWidth, Int64Result()),
                   ConstantExprBits.IsUnsigned));
case ConstantExpr::RSK_None:
  if (ConstantExprBits.APValueKind == APValue::Indeterminate)
    return APValue::IndeterminateValue();
  return APValue();
}
llvm_unreachable("invalid ResultKind")::llvm::llvm_unreachable_internal("invalid ResultKind", "clang/lib/AST/Expr.cpp"
, 479);
480}

482DeclRefExpr::DeclRefExpr(const ASTContext &Ctx, ValueDecl *D,
                       bool RefersToEnclosingVariableOrCapture, QualType T,
                       ExprValueKind VK, SourceLocation L,
                       const DeclarationNameLoc &LocInfo,
                       NonOdrUseReason NOUR)
  : Expr(DeclRefExprClass, T, VK, OK_Ordinary), D(D), DNLoc(LocInfo) {
DeclRefExprBits.HasQualifier = false;
DeclRefExprBits.HasTemplateKWAndArgsInfo = false;
DeclRefExprBits.HasFoundDecl = false;
DeclRefExprBits.HadMultipleCandidates = false;
DeclRefExprBits.RefersToEnclosingVariableOrCapture =
    RefersToEnclosingVariableOrCapture;
DeclRefExprBits.NonOdrUseReason = NOUR;
DeclRefExprBits.Loc = L;
setDependence(computeDependence(this, Ctx));
497}

499DeclRefExpr::DeclRefExpr(const ASTContext &Ctx,
                       NestedNameSpecifierLoc QualifierLoc,
                       SourceLocation TemplateKWLoc, ValueDecl *D,
                       bool RefersToEnclosingVariableOrCapture,
                       const DeclarationNameInfo &NameInfo, NamedDecl *FoundD,
                       const TemplateArgumentListInfo *TemplateArgs,
                       QualType T, ExprValueKind VK, NonOdrUseReason NOUR)
  : Expr(DeclRefExprClass, T, VK, OK_Ordinary), D(D),
    DNLoc(NameInfo.getInfo()) {
DeclRefExprBits.Loc = NameInfo.getLoc();
DeclRefExprBits.HasQualifier = QualifierLoc ? 1 : 0;
if (QualifierLoc)
  new (getTrailingObjects<NestedNameSpecifierLoc>())
      NestedNameSpecifierLoc(QualifierLoc);
DeclRefExprBits.HasFoundDecl = FoundD ? 1 : 0;
if (FoundD)
  *getTrailingObjects<NamedDecl *>() = FoundD;
DeclRefExprBits.HasTemplateKWAndArgsInfo
  = (TemplateArgs || TemplateKWLoc.isValid()) ? 1 : 0;
DeclRefExprBits.RefersToEnclosingVariableOrCapture =
    RefersToEnclosingVariableOrCapture;
DeclRefExprBits.NonOdrUseReason = NOUR;
if (TemplateArgs) {
  auto Deps = TemplateArgumentDependence::None;
  getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
      TemplateKWLoc, *TemplateArgs, getTrailingObjects<TemplateArgumentLoc>(),
      Deps);
  assert(!(Deps & TemplateArgumentDependence::Dependent) &&(static_cast <bool> (!(Deps & TemplateArgumentDependence
::Dependent) && "built a DeclRefExpr with dependent template args"
) ? void (0) : __assert_fail ("!(Deps & TemplateArgumentDependence::Dependent) && \"built a DeclRefExpr with dependent template args\""
, "clang/lib/AST/Expr.cpp", 527, __extension__ __PRETTY_FUNCTION__
))
         "built a DeclRefExpr with dependent template args")(static_cast <bool> (!(Deps & TemplateArgumentDependence
::Dependent) && "built a DeclRefExpr with dependent template args"
) ? void (0) : __assert_fail ("!(Deps & TemplateArgumentDependence::Dependent) && \"built a DeclRefExpr with dependent template args\""
, "clang/lib/AST/Expr.cpp", 527, __extension__ __PRETTY_FUNCTION__
));
} else if (TemplateKWLoc.isValid()) {
  getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
      TemplateKWLoc);
}
DeclRefExprBits.HadMultipleCandidates = 0;
setDependence(computeDependence(this, Ctx));
534}

536DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
                               NestedNameSpecifierLoc QualifierLoc,
                               SourceLocation TemplateKWLoc, ValueDecl *D,
                               bool RefersToEnclosingVariableOrCapture,
                               SourceLocation NameLoc, QualType T,
                               ExprValueKind VK, NamedDecl *FoundD,
                               const TemplateArgumentListInfo *TemplateArgs,
                               NonOdrUseReason NOUR) {
return Create(Context, QualifierLoc, TemplateKWLoc, D,
              RefersToEnclosingVariableOrCapture,
              DeclarationNameInfo(D->getDeclName(), NameLoc),
              T, VK, FoundD, TemplateArgs, NOUR);
548}

550DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
                               NestedNameSpecifierLoc QualifierLoc,
                               SourceLocation TemplateKWLoc, ValueDecl *D,
                               bool RefersToEnclosingVariableOrCapture,
                               const DeclarationNameInfo &NameInfo,
                               QualType T, ExprValueKind VK,
                               NamedDecl *FoundD,
                               const TemplateArgumentListInfo *TemplateArgs,
                               NonOdrUseReason NOUR) {
// Filter out cases where the found Decl is the same as the value refenenced.
if (D == FoundD)
  FoundD = nullptr;

bool HasTemplateKWAndArgsInfo = TemplateArgs || TemplateKWLoc.isValid();
std::size_t Size =
    totalSizeToAlloc<NestedNameSpecifierLoc, NamedDecl *,
                     ASTTemplateKWAndArgsInfo, TemplateArgumentLoc>(
        QualifierLoc ? 1 : 0, FoundD ? 1 : 0,
        HasTemplateKWAndArgsInfo ? 1 : 0,
        TemplateArgs ? TemplateArgs->size() : 0);

void *Mem = Context.Allocate(Size, alignof(DeclRefExpr));
return new (Mem) DeclRefExpr(Context, QualifierLoc, TemplateKWLoc, D,
                             RefersToEnclosingVariableOrCapture, NameInfo,
                             FoundD, TemplateArgs, T, VK, NOUR);
575}

577DeclRefExpr *DeclRefExpr::CreateEmpty(const ASTContext &Context,
                                    bool HasQualifier,
                                    bool HasFoundDecl,
                                    bool HasTemplateKWAndArgsInfo,
                                    unsigned NumTemplateArgs) {
assert(NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo)(static_cast <bool> (NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo
) ? void (0) : __assert_fail ("NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo"
, "clang/lib/AST/Expr.cpp", 582, __extension__ __PRETTY_FUNCTION__
));
std::size_t Size =
    totalSizeToAlloc<NestedNameSpecifierLoc, NamedDecl *,
                     ASTTemplateKWAndArgsInfo, TemplateArgumentLoc>(
        HasQualifier ? 1 : 0, HasFoundDecl ? 1 : 0, HasTemplateKWAndArgsInfo,
        NumTemplateArgs);
void *Mem = Context.Allocate(Size, alignof(DeclRefExpr));
return new (Mem) DeclRefExpr(EmptyShell());
590}

592void DeclRefExpr::setDecl(ValueDecl *NewD) {
D = NewD;
if (getType()->isUndeducedType())
  setType(NewD->getType());
setDependence(computeDependence(this, NewD->getASTContext()));
597}

599SourceLocation DeclRefExpr::getBeginLoc() const {
if (hasQualifier())
  return getQualifierLoc().getBeginLoc();
return getNameInfo().getBeginLoc();
603}
604SourceLocation DeclRefExpr::getEndLoc() const {
if (hasExplicitTemplateArgs())
  return getRAngleLoc();
return getNameInfo().getEndLoc();
608}

610SYCLUniqueStableNameExpr::SYCLUniqueStableNameExpr(SourceLocation OpLoc,
                                                 SourceLocation LParen,
                                                 SourceLocation RParen,
                                                 QualType ResultTy,
                                                 TypeSourceInfo *TSI)
  : Expr(SYCLUniqueStableNameExprClass, ResultTy, VK_PRValue, OK_Ordinary),
    OpLoc(OpLoc), LParen(LParen), RParen(RParen) {
setTypeSourceInfo(TSI);
setDependence(computeDependence(this));
619}

621SYCLUniqueStableNameExpr::SYCLUniqueStableNameExpr(EmptyShell Empty,
                                                 QualType ResultTy)
  : Expr(SYCLUniqueStableNameExprClass, ResultTy, VK_PRValue, OK_Ordinary) {}

625SYCLUniqueStableNameExpr *
626SYCLUniqueStableNameExpr::Create(const ASTContext &Ctx, SourceLocation OpLoc,
                               SourceLocation LParen, SourceLocation RParen,
                               TypeSourceInfo *TSI) {
QualType ResultTy = Ctx.getPointerType(Ctx.CharTy.withConst());
return new (Ctx)
    SYCLUniqueStableNameExpr(OpLoc, LParen, RParen, ResultTy, TSI);
632}

634SYCLUniqueStableNameExpr *
635SYCLUniqueStableNameExpr::CreateEmpty(const ASTContext &Ctx) {
QualType ResultTy = Ctx.getPointerType(Ctx.CharTy.withConst());
return new (Ctx) SYCLUniqueStableNameExpr(EmptyShell(), ResultTy);
638}

640std::string SYCLUniqueStableNameExpr::ComputeName(ASTContext &Context) const {
return SYCLUniqueStableNameExpr::ComputeName(Context,
                                             getTypeSourceInfo()->getType());
643}

645std::string SYCLUniqueStableNameExpr::ComputeName(ASTContext &Context,
                                                QualType Ty) {
auto MangleCallback = [](ASTContext &Ctx,
                         const NamedDecl *ND) -> std::optional<unsigned> {
  if (const auto *RD = dyn_cast<CXXRecordDecl>(ND))
    return RD->getDeviceLambdaManglingNumber();
  return std::nullopt;
};

std::unique_ptr<MangleContext> Ctx{ItaniumMangleContext::create(
    Context, Context.getDiagnostics(), MangleCallback)};

std::string Buffer;
Buffer.reserve(128);
llvm::raw_string_ostream Out(Buffer);
Ctx->mangleTypeName(Ty, Out);

return Out.str();
663}

665PredefinedExpr::PredefinedExpr(SourceLocation L, QualType FNTy, IdentKind IK,
                             StringLiteral *SL)
  : Expr(PredefinedExprClass, FNTy, VK_LValue, OK_Ordinary) {
PredefinedExprBits.Kind = IK;
assert((getIdentKind() == IK) &&(static_cast <bool> ((getIdentKind() == IK) && "IdentKind do not fit in PredefinedExprBitfields!"
) ? void (0) : __assert_fail ("(getIdentKind() == IK) && \"IdentKind do not fit in PredefinedExprBitfields!\""
, "clang/lib/AST/Expr.cpp", 670, __extension__ __PRETTY_FUNCTION__
))
       "IdentKind do not fit in PredefinedExprBitfields!")(static_cast <bool> ((getIdentKind() == IK) && "IdentKind do not fit in PredefinedExprBitfields!"
) ? void (0) : __assert_fail ("(getIdentKind() == IK) && \"IdentKind do not fit in PredefinedExprBitfields!\""
, "clang/lib/AST/Expr.cpp", 670, __extension__ __PRETTY_FUNCTION__
));
bool HasFunctionName = SL != nullptr;
PredefinedExprBits.HasFunctionName = HasFunctionName;
PredefinedExprBits.Loc = L;
if (HasFunctionName)
  setFunctionName(SL);
setDependence(computeDependence(this));
677}

679PredefinedExpr::PredefinedExpr(EmptyShell Empty, bool HasFunctionName)
  : Expr(PredefinedExprClass, Empty) {
PredefinedExprBits.HasFunctionName = HasFunctionName;
682}

684PredefinedExpr *PredefinedExpr::Create(const ASTContext &Ctx, SourceLocation L,
                                     QualType FNTy, IdentKind IK,
                                     StringLiteral *SL) {
bool HasFunctionName = SL != nullptr;
void *Mem = Ctx.Allocate(totalSizeToAlloc<Stmt *>(HasFunctionName),
                         alignof(PredefinedExpr));
return new (Mem) PredefinedExpr(L, FNTy, IK, SL);
691}

693PredefinedExpr *PredefinedExpr::CreateEmpty(const ASTContext &Ctx,
                                          bool HasFunctionName) {
void *Mem = Ctx.Allocate(totalSizeToAlloc<Stmt *>(HasFunctionName),
                         alignof(PredefinedExpr));
return new (Mem) PredefinedExpr(EmptyShell(), HasFunctionName);
698}

700StringRef PredefinedExpr::getIdentKindName(PredefinedExpr::IdentKind IK) {
switch (IK) {
case Func:
  return "__func__";
case Function:
  return "__FUNCTION__";
case FuncDName:
  return "__FUNCDNAME__";
case LFunction:
  return "L__FUNCTION__";
case PrettyFunction:
  return "__PRETTY_FUNCTION__";
case FuncSig:
  return "__FUNCSIG__";
case LFuncSig:
  return "L__FUNCSIG__";
case PrettyFunctionNoVirtual:
  break;
}
llvm_unreachable("Unknown ident kind for PredefinedExpr")::llvm::llvm_unreachable_internal("Unknown ident kind for PredefinedExpr"
, "clang/lib/AST/Expr.cpp", 719);
720}

722// FIXME: Maybe this should use DeclPrinter with a special "print predefined
723// expr" policy instead.
724std::string PredefinedExpr::ComputeName(IdentKind IK, const Decl *CurrentDecl) {
ASTContext &Context = CurrentDecl->getASTContext();

if (IK == PredefinedExpr::FuncDName) {
1
Assuming 'IK' is not equal to FuncDName→
2
←
Taking false branch→
  if (const NamedDecl *ND = dyn_cast<NamedDecl>(CurrentDecl)) {
    std::unique_ptr<MangleContext> MC;
    MC.reset(Context.createMangleContext());

    if (MC->shouldMangleDeclName(ND)) {
      SmallString<256> Buffer;
      llvm::raw_svector_ostream Out(Buffer);
      GlobalDecl GD;
      if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(ND))
        GD = GlobalDecl(CD, Ctor_Base);
      else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(ND))
        GD = GlobalDecl(DD, Dtor_Base);
      else if (ND->hasAttr<CUDAGlobalAttr>())
        GD = GlobalDecl(cast<FunctionDecl>(ND));
      else
        GD = GlobalDecl(ND);
      MC->mangleName(GD, Out);

      if (!Buffer.empty() && Buffer.front() == '\01')
        return std::string(Buffer.substr(1));
      return std::string(Buffer.str());
    }
    return std::string(ND->getIdentifier()->getName());
  }
  return "";
}
if (isa<BlockDecl>(CurrentDecl)) {
3
←
Assuming 'CurrentDecl' is not a 'BlockDecl'→
4
←
Taking false branch→
  // For blocks we only emit something if it is enclosed in a function
  // For top-level block we'd like to include the name of variable, but we
  // don't have it at this point.
  auto DC = CurrentDecl->getDeclContext();
  if (DC->isFileContext())
    return "";

  SmallString<256> Buffer;
  llvm::raw_svector_ostream Out(Buffer);
  if (auto *DCBlock = dyn_cast<BlockDecl>(DC))
    // For nested blocks, propagate up to the parent.
    Out << ComputeName(IK, DCBlock);
  else if (auto *DCDecl = dyn_cast<Decl>(DC))
    Out << ComputeName(IK, DCDecl) << "_block_invoke";
  return std::string(Out.str());
}
if (const FunctionDecl *FD5.1
'FD' is non-null
 = dyn_cast<FunctionDecl>(CurrentDecl)) {
5
←
Assuming 'CurrentDecl' is a 'CastReturnType'→
  if (IK != PrettyFunction && IK != PrettyFunctionNoVirtual &&
6
←
Assuming 'IK' is equal to PrettyFunction→
      IK != FuncSig && IK != LFuncSig)
    return FD->getNameAsString();

  SmallString<256> Name;
  llvm::raw_svector_ostream Out(Name);

  if (const CXXMethodDecl *MD7.1
'MD' is null
 = dyn_cast<CXXMethodDecl>(FD)) {
7
←
Assuming 'FD' is not a 'CastReturnType'→
8
←
Taking false branch→
    if (MD->isVirtual() && IK != PrettyFunctionNoVirtual)
      Out << "virtual ";
    if (MD->isStatic())
      Out << "static ";
  }

  PrintingPolicy Policy(Context.getLangOpts());
  std::string Proto;
  llvm::raw_string_ostream POut(Proto);

  const FunctionDecl *Decl = FD;
  if (const FunctionDecl* Pattern = FD->getTemplateInstantiationPattern())
9
←
Assuming 'Pattern' is null→
10
←
Taking false branch→
    Decl = Pattern;
  const FunctionType *AFT = Decl->getType()->getAs<FunctionType>();
11
←
Assuming the object is not a 'const class clang::FunctionType *'→
12
←
'AFT' initialized to a null pointer value→
  const FunctionProtoType *FT = nullptr;
  if (FD->hasWrittenPrototype())
13
←
Assuming the condition is false→
    FT = dyn_cast<FunctionProtoType>(AFT);

  if (IK13.1
'IK' is not equal to FuncSig
 == FuncSig || IK13.2
'IK' is not equal to LFuncSig
 == LFuncSig) {
14
←
Taking false branch→
    switch (AFT->getCallConv()) {
    case CC_C: POut << "__cdecl "; break;
    case CC_X86StdCall: POut << "__stdcall "; break;
    case CC_X86FastCall: POut << "__fastcall "; break;
    case CC_X86ThisCall: POut << "__thiscall "; break;
    case CC_X86VectorCall: POut << "__vectorcall "; break;
    case CC_X86RegCall: POut << "__regcall "; break;
    // Only bother printing the conventions that MSVC knows about.
    default: break;
    }
  }

  FD->printQualifiedName(POut, Policy);

  POut << "(";
  if (FT14.1
'FT' is null
) {
15
←
Taking false branch→
    for (unsigned i = 0, e = Decl->getNumParams(); i != e; ++i) {
      if (i) POut << ", ";
      POut << Decl->getParamDecl(i)->getType().stream(Policy);
    }

    if (FT->isVariadic()) {
      if (FD->getNumParams()) POut << ", ";
      POut << "...";
    } else if ((IK == FuncSig || IK == LFuncSig ||
                !Context.getLangOpts().CPlusPlus) &&
               !Decl->getNumParams()) {
      POut << "void";
    }
  }
  POut << ")";

  if (const CXXMethodDecl *MD16.1
'MD' is null
 = dyn_cast<CXXMethodDecl>(FD)) {
16
←
'FD' is not a 'CXXMethodDecl'→
17
←
Taking false branch→
    assert(FT && "We must have a written prototype in this case.")(static_cast <bool> (FT && "We must have a written prototype in this case."
) ? void (0) : __assert_fail ("FT && \"We must have a written prototype in this case.\""
, "clang/lib/AST/Expr.cpp", 832, __extension__ __PRETTY_FUNCTION__
));
    if (FT->isConst())
      POut << " const";
    if (FT->isVolatile())
      POut << " volatile";
    RefQualifierKind Ref = MD->getRefQualifier();
    if (Ref == RQ_LValue)
      POut << " &";
    else if (Ref == RQ_RValue)
      POut << " &&";
  }

  typedef SmallVector<const ClassTemplateSpecializationDecl *, 8> SpecsTy;
  SpecsTy Specs;
  const DeclContext *Ctx = FD->getDeclContext();
  while (Ctx && isa<NamedDecl>(Ctx)) {
18
←
Assuming 'Ctx' is null→
    const ClassTemplateSpecializationDecl *Spec
                             = dyn_cast<ClassTemplateSpecializationDecl>(Ctx);
    if (Spec && !Spec->isExplicitSpecialization())
      Specs.push_back(Spec);
    Ctx = Ctx->getParent();
  }

  std::string TemplateParams;
  llvm::raw_string_ostream TOut(TemplateParams);
  for (const ClassTemplateSpecializationDecl *D : llvm::reverse(Specs)) {
    const TemplateParameterList *Params =
        D->getSpecializedTemplate()->getTemplateParameters();
    const TemplateArgumentList &Args = D->getTemplateArgs();
    assert(Params->size() == Args.size())(static_cast <bool> (Params->size() == Args.size()) ?
 void (0) : __assert_fail ("Params->size() == Args.size()"
, "clang/lib/AST/Expr.cpp", 861, __extension__ __PRETTY_FUNCTION__
));
    for (unsigned i = 0, numParams = Params->size(); i != numParams; ++i) {
      StringRef Param = Params->getParam(i)->getName();
      if (Param.empty()) continue;
      TOut << Param << " = ";
      Args.get(i).print(Policy, TOut,
                        TemplateParameterList::shouldIncludeTypeForArgument(
                            Policy, Params, i));
      TOut << ", ";
    }
  }

  FunctionTemplateSpecializationInfo *FSI
                                        = FD->getTemplateSpecializationInfo();
  if (FSI && !FSI->isExplicitSpecialization()) {
19
←
Assuming 'FSI' is null→
    const TemplateParameterList* Params
                                = FSI->getTemplate()->getTemplateParameters();
    const TemplateArgumentList* Args = FSI->TemplateArguments;
    assert(Params->size() == Args->size())(static_cast <bool> (Params->size() == Args->size
()) ? void (0) : __assert_fail ("Params->size() == Args->size()"
, "clang/lib/AST/Expr.cpp", 879, __extension__ __PRETTY_FUNCTION__
));
    for (unsigned i = 0, e = Params->size(); i != e; ++i) {
      StringRef Param = Params->getParam(i)->getName();
      if (Param.empty()) continue;
      TOut << Param << " = ";
      Args->get(i).print(Policy, TOut, /*IncludeType*/ true);
      TOut << ", ";
    }
  }

  TOut.flush();
  if (!TemplateParams.empty()) {
20
←
Assuming the condition is false→
21
←
Taking false branch→
    // remove the trailing comma and space
    TemplateParams.resize(TemplateParams.size() - 2);
    POut << " [" << TemplateParams << "]";
  }

  POut.flush();

  // Print "auto" for all deduced return types. This includes C++1y return
  // type deduction and lambdas. For trailing return types resolve the
  // decltype expression. Otherwise print the real type when this is
  // not a constructor or destructor.
  if (isa<CXXMethodDecl>(FD) &&
22
←
'FD' is not a 'CXXMethodDecl'→
       cast<CXXMethodDecl>(FD)->getParent()->isLambda())
    Proto = "auto " + Proto;
  else if (FT22.1
'FT' is null
 && FT->getReturnType()->getAs<DecltypeType>())
    FT->getReturnType()
        ->getAs<DecltypeType>()
        ->getUnderlyingType()
        .getAsStringInternal(Proto, Policy);
  else if (!isa<CXXConstructorDecl>(FD) && !isa<CXXDestructorDecl>(FD))
23
←
Assuming 'FD' is not a 'CXXConstructorDecl'→
24
←
Assuming 'FD' is not a 'CXXDestructorDecl'→
25
←
Taking true branch→
    AFT->getReturnType().getAsStringInternal(Proto, Policy);
26
←
Called C++ object pointer is null

  Out << Proto;

  return std::string(Name);
}
if (const CapturedDecl *CD = dyn_cast<CapturedDecl>(CurrentDecl)) {
  for (const DeclContext *DC = CD->getParent(); DC; DC = DC->getParent())
    // Skip to its enclosing function or method, but not its enclosing
    // CapturedDecl.
    if (DC->isFunctionOrMethod() && (DC->getDeclKind() != Decl::Captured)) {
      const Decl *D = Decl::castFromDeclContext(DC);
      return ComputeName(IK, D);
    }
  llvm_unreachable("CapturedDecl not inside a function or method")::llvm::llvm_unreachable_internal("CapturedDecl not inside a function or method"
, "clang/lib/AST/Expr.cpp", 925);
}
if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(CurrentDecl)) {
  SmallString<256> Name;
  llvm::raw_svector_ostream Out(Name);
  Out << (MD->isInstanceMethod() ? '-' : '+');
  Out << '[';

  // For incorrect code, there might not be an ObjCInterfaceDecl.  Do
  // a null check to avoid a crash.
  if (const ObjCInterfaceDecl *ID = MD->getClassInterface())
    Out << *ID;

  if (const ObjCCategoryImplDecl *CID =
      dyn_cast<ObjCCategoryImplDecl>(MD->getDeclContext()))
    Out << '(' << *CID << ')';

  Out <<  ' ';
  MD->getSelector().print(Out);
  Out <<  ']';

  return std::string(Name);
}
if (isa<TranslationUnitDecl>(CurrentDecl) && IK == PrettyFunction) {
  // __PRETTY_FUNCTION__ -> "top level", the others produce an empty string.
  return "top level";
}
return "";
953}

955void APNumericStorage::setIntValue(const ASTContext &C,
                                 const llvm::APInt &Val) {
if (hasAllocation())
  C.Deallocate(pVal);

BitWidth = Val.getBitWidth();
unsigned NumWords = Val.getNumWords();
const uint64_t* Words = Val.getRawData();
if (NumWords > 1) {
  pVal = new (C) uint64_t[NumWords];
  std::copy(Words, Words + NumWords, pVal);
} else if (NumWords == 1)
  VAL = Words[0];
else
  VAL = 0;
970}

972IntegerLiteral::IntegerLiteral(const ASTContext &C, const llvm::APInt &V,
                             QualType type, SourceLocation l)
  : Expr(IntegerLiteralClass, type, VK_PRValue, OK_Ordinary), Loc(l) {
assert(type->isIntegerType() && "Illegal type in IntegerLiteral")(static_cast <bool> (type->isIntegerType() &&
 "Illegal type in IntegerLiteral") ? void (0) : __assert_fail
 ("type->isIntegerType() && \"Illegal type in IntegerLiteral\""
, "clang/lib/AST/Expr.cpp", 975, __extension__ __PRETTY_FUNCTION__
));
assert(V.getBitWidth() == C.getIntWidth(type) &&(static_cast <bool> (V.getBitWidth() == C.getIntWidth(type
) && "Integer type is not the correct size for constant."
) ? void (0) : __assert_fail ("V.getBitWidth() == C.getIntWidth(type) && \"Integer type is not the correct size for constant.\""
, "clang/lib/AST/Expr.cpp", 977, __extension__ __PRETTY_FUNCTION__
))
       "Integer type is not the correct size for constant.")(static_cast <bool> (V.getBitWidth() == C.getIntWidth(type
) && "Integer type is not the correct size for constant."
) ? void (0) : __assert_fail ("V.getBitWidth() == C.getIntWidth(type) && \"Integer type is not the correct size for constant.\""
, "clang/lib/AST/Expr.cpp", 977, __extension__ __PRETTY_FUNCTION__
));
setValue(C, V);
setDependence(ExprDependence::None);
980}

982IntegerLiteral *
983IntegerLiteral::Create(const ASTContext &C, const llvm::APInt &V,
                     QualType type, SourceLocation l) {
return new (C) IntegerLiteral(C, V, type, l);
986}

988IntegerLiteral *
989IntegerLiteral::Create(const ASTContext &C, EmptyShell Empty) {
return new (C) IntegerLiteral(Empty);
991}

993FixedPointLiteral::FixedPointLiteral(const ASTContext &C, const llvm::APInt &V,
                                   QualType type, SourceLocation l,
                                   unsigned Scale)
  : Expr(FixedPointLiteralClass, type, VK_PRValue, OK_Ordinary), Loc(l),
    Scale(Scale) {
assert(type->isFixedPointType() && "Illegal type in FixedPointLiteral")(static_cast <bool> (type->isFixedPointType() &&
 "Illegal type in FixedPointLiteral") ? void (0) : __assert_fail
 ("type->isFixedPointType() && \"Illegal type in FixedPointLiteral\""
, "clang/lib/AST/Expr.cpp", 998, __extension__ __PRETTY_FUNCTION__
));
assert(V.getBitWidth() == C.getTypeInfo(type).Width &&(static_cast <bool> (V.getBitWidth() == C.getTypeInfo(type
).Width && "Fixed point type is not the correct size for constant."
) ? void (0) : __assert_fail ("V.getBitWidth() == C.getTypeInfo(type).Width && \"Fixed point type is not the correct size for constant.\""
, "clang/lib/AST/Expr.cpp", 1000, __extension__ __PRETTY_FUNCTION__
))
       "Fixed point type is not the correct size for constant.")(static_cast <bool> (V.getBitWidth() == C.getTypeInfo(type
).Width && "Fixed point type is not the correct size for constant."
) ? void (0) : __assert_fail ("V.getBitWidth() == C.getTypeInfo(type).Width && \"Fixed point type is not the correct size for constant.\""
, "clang/lib/AST/Expr.cpp", 1000, __extension__ __PRETTY_FUNCTION__
));
setValue(C, V);
setDependence(ExprDependence::None);
1003}

1005FixedPointLiteral *FixedPointLiteral::CreateFromRawInt(const ASTContext &C,
                                                     const llvm::APInt &V,
                                                     QualType type,
                                                     SourceLocation l,
                                                     unsigned Scale) {
return new (C) FixedPointLiteral(C, V, type, l, Scale);
1011}

1013FixedPointLiteral *FixedPointLiteral::Create(const ASTContext &C,
                                           EmptyShell Empty) {
return new (C) FixedPointLiteral(Empty);
1016}

1018std::string FixedPointLiteral::getValueAsString(unsigned Radix) const {
// Currently the longest decimal number that can be printed is the max for an
// unsigned long _Accum: 4294967295.99999999976716935634613037109375
// which is 43 characters.
SmallString<64> S;
FixedPointValueToString(
    S, llvm::APSInt::getUnsigned(getValue().getZExtValue()), Scale);
return std::string(S.str());
1026}

1028void CharacterLiteral::print(unsigned Val, CharacterKind Kind,
                           raw_ostream &OS) {
switch (Kind) {
case CharacterLiteral::Ascii:
  break; // no prefix.
case CharacterLiteral::Wide:
  OS << 'L';
  break;
case CharacterLiteral::UTF8:
  OS << "u8";
  break;
case CharacterLiteral::UTF16:
  OS << 'u';
  break;
case CharacterLiteral::UTF32:
  OS << 'U';
  break;
}

StringRef Escaped = escapeCStyle<EscapeChar::Single>(Val);
if (!Escaped.empty()) {
  OS << "'" << Escaped << "'";
} else {
  // A character literal might be sign-extended, which
  // would result in an invalid \U escape sequence.
  // FIXME: multicharacter literals such as '\xFF\xFF\xFF\xFF'
  // are not correctly handled.
  if ((Val & ~0xFFu) == ~0xFFu && Kind == CharacterLiteral::Ascii)
    Val &= 0xFFu;
  if (Val < 256 && isPrintable((unsigned char)Val))
    OS << "'" << (char)Val << "'";
  else if (Val < 256)
    OS << "'\\x" << llvm::format("%02x", Val) << "'";
  else if (Val <= 0xFFFF)
    OS << "'\\u" << llvm::format("%04x", Val) << "'";
  else
    OS << "'\\U" << llvm::format("%08x", Val) << "'";
}
1066}

1068FloatingLiteral::FloatingLiteral(const ASTContext &C, const llvm::APFloat &V,
                               bool isexact, QualType Type, SourceLocation L)
  : Expr(FloatingLiteralClass, Type, VK_PRValue, OK_Ordinary), Loc(L) {
setSemantics(V.getSemantics());
FloatingLiteralBits.IsExact = isexact;
setValue(C, V);
setDependence(ExprDependence::None);
1075}

1077FloatingLiteral::FloatingLiteral(const ASTContext &C, EmptyShell Empty)
: Expr(FloatingLiteralClass, Empty) {
setRawSemantics(llvm::APFloatBase::S_IEEEhalf);
FloatingLiteralBits.IsExact = false;
1081}

1083FloatingLiteral *
1084FloatingLiteral::Create(const ASTContext &C, const llvm::APFloat &V,
                      bool isexact, QualType Type, SourceLocation L) {
return new (C) FloatingLiteral(C, V, isexact, Type, L);
1087}

1089FloatingLiteral *
1090FloatingLiteral::Create(const ASTContext &C, EmptyShell Empty) {
return new (C) FloatingLiteral(C, Empty);
1092}

1094/// getValueAsApproximateDouble - This returns the value as an inaccurate
1095/// double.  Note that this may cause loss of precision, but is useful for
1096/// debugging dumps, etc.
1097double FloatingLiteral::getValueAsApproximateDouble() const {
llvm::APFloat V = getValue();
bool ignored;
V.convert(llvm::APFloat::IEEEdouble(), llvm::APFloat::rmNearestTiesToEven,
          &ignored);
return V.convertToDouble();
1103}

1105unsigned StringLiteral::mapCharByteWidth(TargetInfo const &Target,
                                       StringKind SK) {
unsigned CharByteWidth = 0;
switch (SK) {
case Ordinary:
case UTF8:
  CharByteWidth = Target.getCharWidth();
  break;
case Wide:
  CharByteWidth = Target.getWCharWidth();
  break;
case UTF16:
  CharByteWidth = Target.getChar16Width();
  break;
case UTF32:
  CharByteWidth = Target.getChar32Width();
  break;
}
assert((CharByteWidth & 7) == 0 && "Assumes character size is byte multiple")(static_cast <bool> ((CharByteWidth & 7) == 0 &&
 "Assumes character size is byte multiple") ? void (0) : __assert_fail
 ("(CharByteWidth & 7) == 0 && \"Assumes character size is byte multiple\""
, "clang/lib/AST/Expr.cpp", 1123, __extension__ __PRETTY_FUNCTION__
));
CharByteWidth /= 8;
assert((CharByteWidth == 1 || CharByteWidth == 2 || CharByteWidth == 4) &&(static_cast <bool> ((CharByteWidth == 1 || CharByteWidth
 == 2 || CharByteWidth == 4) && "The only supported character byte widths are 1,2 and 4!"
) ? void (0) : __assert_fail ("(CharByteWidth == 1 || CharByteWidth == 2 || CharByteWidth == 4) && \"The only supported character byte widths are 1,2 and 4!\""
, "clang/lib/AST/Expr.cpp", 1126, __extension__ __PRETTY_FUNCTION__
))
       "The only supported character byte widths are 1,2 and 4!")(static_cast <bool> ((CharByteWidth == 1 || CharByteWidth
 == 2 || CharByteWidth == 4) && "The only supported character byte widths are 1,2 and 4!"
) ? void (0) : __assert_fail ("(CharByteWidth == 1 || CharByteWidth == 2 || CharByteWidth == 4) && \"The only supported character byte widths are 1,2 and 4!\""
, "clang/lib/AST/Expr.cpp", 1126, __extension__ __PRETTY_FUNCTION__
));
return CharByteWidth;
1128}

1130StringLiteral::StringLiteral(const ASTContext &Ctx, StringRef Str,
                           StringKind Kind, bool Pascal, QualType Ty,
                           const SourceLocation *Loc,
                           unsigned NumConcatenated)
  : Expr(StringLiteralClass, Ty, VK_LValue, OK_Ordinary) {
assert(Ctx.getAsConstantArrayType(Ty) &&(static_cast <bool> (Ctx.getAsConstantArrayType(Ty) &&
 "StringLiteral must be of constant array type!") ? void (0) :
 __assert_fail ("Ctx.getAsConstantArrayType(Ty) && \"StringLiteral must be of constant array type!\""
, "clang/lib/AST/Expr.cpp", 1136, __extension__ __PRETTY_FUNCTION__
))
       "StringLiteral must be of constant array type!")(static_cast <bool> (Ctx.getAsConstantArrayType(Ty) &&
 "StringLiteral must be of constant array type!") ? void (0) :
 __assert_fail ("Ctx.getAsConstantArrayType(Ty) && \"StringLiteral must be of constant array type!\""
, "clang/lib/AST/Expr.cpp", 1136, __extension__ __PRETTY_FUNCTION__
));
unsigned CharByteWidth = mapCharByteWidth(Ctx.getTargetInfo(), Kind);
unsigned ByteLength = Str.size();
assert((ByteLength % CharByteWidth == 0) &&(static_cast <bool> ((ByteLength % CharByteWidth == 0) &&
 "The size of the data must be a multiple of CharByteWidth!")
 ? void (0) : __assert_fail ("(ByteLength % CharByteWidth == 0) && \"The size of the data must be a multiple of CharByteWidth!\""
, "clang/lib/AST/Expr.cpp", 1140, __extension__ __PRETTY_FUNCTION__
))
       "The size of the data must be a multiple of CharByteWidth!")(static_cast <bool> ((ByteLength % CharByteWidth == 0) &&
 "The size of the data must be a multiple of CharByteWidth!")
 ? void (0) : __assert_fail ("(ByteLength % CharByteWidth == 0) && \"The size of the data must be a multiple of CharByteWidth!\""
, "clang/lib/AST/Expr.cpp", 1140, __extension__ __PRETTY_FUNCTION__
));

// Avoid the expensive division. The compiler should be able to figure it
// out by itself. However as of clang 7, even with the appropriate
// llvm_unreachable added just here, it is not able to do so.
unsigned Length;
switch (CharByteWidth) {
case 1:
  Length = ByteLength;
  break;
case 2:
  Length = ByteLength / 2;
  break;
case 4:
  Length = ByteLength / 4;
  break;
default:
  llvm_unreachable("Unsupported character width!")::llvm::llvm_unreachable_internal("Unsupported character width!"
, "clang/lib/AST/Expr.cpp", 1157);
}

StringLiteralBits.Kind = Kind;
StringLiteralBits.CharByteWidth = CharByteWidth;
StringLiteralBits.IsPascal = Pascal;
StringLiteralBits.NumConcatenated = NumConcatenated;
*getTrailingObjects<unsigned>() = Length;

// Initialize the trailing array of SourceLocation.
// This is safe since SourceLocation is POD-like.
std::memcpy(getTrailingObjects<SourceLocation>(), Loc,
            NumConcatenated * sizeof(SourceLocation));

// Initialize the trailing array of char holding the string data.
std::memcpy(getTrailingObjects<char>(), Str.data(), ByteLength);

setDependence(ExprDependence::None);
1175}

1177StringLiteral::StringLiteral(EmptyShell Empty, unsigned NumConcatenated,
                           unsigned Length, unsigned CharByteWidth)
  : Expr(StringLiteralClass, Empty) {
StringLiteralBits.CharByteWidth = CharByteWidth;
StringLiteralBits.NumConcatenated = NumConcatenated;
*getTrailingObjects<unsigned>() = Length;
1183}

1185StringLiteral *StringLiteral::Create(const ASTContext &Ctx, StringRef Str,
                                   StringKind Kind, bool Pascal, QualType Ty,
                                   const SourceLocation *Loc,
                                   unsigned NumConcatenated) {
void *Mem = Ctx.Allocate(totalSizeToAlloc<unsigned, SourceLocation, char>(
                             1, NumConcatenated, Str.size()),
                         alignof(StringLiteral));
return new (Mem)
    StringLiteral(Ctx, Str, Kind, Pascal, Ty, Loc, NumConcatenated);
1194}

1196StringLiteral *StringLiteral::CreateEmpty(const ASTContext &Ctx,
                                        unsigned NumConcatenated,
                                        unsigned Length,
                                        unsigned CharByteWidth) {
void *Mem = Ctx.Allocate(totalSizeToAlloc<unsigned, SourceLocation, char>(
                             1, NumConcatenated, Length * CharByteWidth),
                         alignof(StringLiteral));
return new (Mem)
    StringLiteral(EmptyShell(), NumConcatenated, Length, CharByteWidth);
1205}

1207void StringLiteral::outputString(raw_ostream &OS) const {
switch (getKind()) {
case Ordinary:
  break; // no prefix.
case Wide:  OS << 'L'; break;
case UTF8:  OS << "u8"; break;
case UTF16: OS << 'u'; break;
case UTF32: OS << 'U'; break;
}
OS << '"';
static const char Hex[] = "0123456789ABCDEF";

unsigned LastSlashX = getLength();
for (unsigned I = 0, N = getLength(); I != N; ++I) {
  uint32_t Char = getCodeUnit(I);
  StringRef Escaped = escapeCStyle<EscapeChar::Double>(Char);
  if (Escaped.empty()) {
    // FIXME: Convert UTF-8 back to codepoints before rendering.

    // Convert UTF-16 surrogate pairs back to codepoints before rendering.
    // Leave invalid surrogates alone; we'll use \x for those.
    if (getKind() == UTF16 && I != N - 1 && Char >= 0xd800 &&
        Char <= 0xdbff) {
      uint32_t Trail = getCodeUnit(I + 1);
      if (Trail >= 0xdc00 && Trail <= 0xdfff) {
        Char = 0x10000 + ((Char - 0xd800) << 10) + (Trail - 0xdc00);
        ++I;
      }
    }

    if (Char > 0xff) {
      // If this is a wide string, output characters over 0xff using \x
      // escapes. Otherwise, this is a UTF-16 or UTF-32 string, and Char is a
      // codepoint: use \x escapes for invalid codepoints.
      if (getKind() == Wide ||
          (Char >= 0xd800 && Char <= 0xdfff) || Char >= 0x110000) {
        // FIXME: Is this the best way to print wchar_t?
        OS << "\\x";
        int Shift = 28;
        while ((Char >> Shift) == 0)
          Shift -= 4;
        for (/**/; Shift >= 0; Shift -= 4)
          OS << Hex[(Char >> Shift) & 15];
        LastSlashX = I;
        continue;
      }

      if (Char > 0xffff)
        OS << "\\U00"
           << Hex[(Char >> 20) & 15]
           << Hex[(Char >> 16) & 15];
      else
        OS << "\\u";
      OS << Hex[(Char >> 12) & 15]
         << Hex[(Char >>  8) & 15]
         << Hex[(Char >>  4) & 15]
         << Hex[(Char >>  0) & 15];
      continue;
    }

    // If we used \x... for the previous character, and this character is a
    // hexadecimal digit, prevent it being slurped as part of the \x.
    if (LastSlashX + 1 == I) {
      switch (Char) {
        case '0': case '1': case '2': case '3': case '4':
        case '5': case '6': case '7': case '8': case '9':
        case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
        case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
          OS << "\"\"";
      }
    }

    assert(Char <= 0xff &&(static_cast <bool> (Char <= 0xff && "Characters above 0xff should already have been handled."
) ? void (0) : __assert_fail ("Char <= 0xff && \"Characters above 0xff should already have been handled.\""
, "clang/lib/AST/Expr.cpp", 1280, __extension__ __PRETTY_FUNCTION__
))
           "Characters above 0xff should already have been handled.")(static_cast <bool> (Char <= 0xff && "Characters above 0xff should already have been handled."
) ? void (0) : __assert_fail ("Char <= 0xff && \"Characters above 0xff should already have been handled.\""
, "clang/lib/AST/Expr.cpp", 1280, __extension__ __PRETTY_FUNCTION__
));

    if (isPrintable(Char))
      OS << (char)Char;
    else  // Output anything hard as an octal escape.
      OS << '\\'
         << (char)('0' + ((Char >> 6) & 7))
         << (char)('0' + ((Char >> 3) & 7))
         << (char)('0' + ((Char >> 0) & 7));
  } else {
    // Handle some common non-printable cases to make dumps prettier.
    OS << Escaped;
  }
}
OS << '"';
1295}

1297/// getLocationOfByte - Return a source location that points to the specified
1298/// byte of this string literal.
1299///
1300/// Strings are amazingly complex.  They can be formed from multiple tokens and
1301/// can have escape sequences in them in addition to the usual trigraph and
1302/// escaped newline business.  This routine handles this complexity.
1303///
1304/// The *StartToken sets the first token to be searched in this function and
1305/// the *StartTokenByteOffset is the byte offset of the first token. Before
1306/// returning, it updates the *StartToken to the TokNo of the token being found
1307/// and sets *StartTokenByteOffset to the byte offset of the token in the
1308/// string.
1309/// Using these two parameters can reduce the time complexity from O(n^2) to
1310/// O(n) if one wants to get the location of byte for all the tokens in a
1311/// string.
1312///
1313SourceLocation
1314StringLiteral::getLocationOfByte(unsigned ByteNo, const SourceManager &SM,
                               const LangOptions &Features,
                               const TargetInfo &Target, unsigned *StartToken,
                               unsigned *StartTokenByteOffset) const {
assert((getKind() == StringLiteral::Ordinary ||(static_cast <bool> ((getKind() == StringLiteral::Ordinary
 || getKind() == StringLiteral::UTF8) && "Only narrow string literals are currently supported"
) ? void (0) : __assert_fail ("(getKind() == StringLiteral::Ordinary || getKind() == StringLiteral::UTF8) && \"Only narrow string literals are currently supported\""
, "clang/lib/AST/Expr.cpp", 1320, __extension__ __PRETTY_FUNCTION__
))
        getKind() == StringLiteral::UTF8) &&(static_cast <bool> ((getKind() == StringLiteral::Ordinary
 || getKind() == StringLiteral::UTF8) && "Only narrow string literals are currently supported"
) ? void (0) : __assert_fail ("(getKind() == StringLiteral::Ordinary || getKind() == StringLiteral::UTF8) && \"Only narrow string literals are currently supported\""
, "clang/lib/AST/Expr.cpp", 1320, __extension__ __PRETTY_FUNCTION__
))
       "Only narrow string literals are currently supported")(static_cast <bool> ((getKind() == StringLiteral::Ordinary
 || getKind() == StringLiteral::UTF8) && "Only narrow string literals are currently supported"
) ? void (0) : __assert_fail ("(getKind() == StringLiteral::Ordinary || getKind() == StringLiteral::UTF8) && \"Only narrow string literals are currently supported\""
, "clang/lib/AST/Expr.cpp", 1320, __extension__ __PRETTY_FUNCTION__
));

// Loop over all of the tokens in this string until we find the one that
// contains the byte we're looking for.
unsigned TokNo = 0;
unsigned StringOffset = 0;
if (StartToken)
  TokNo = *StartToken;
if (StartTokenByteOffset) {
  StringOffset = *StartTokenByteOffset;
  ByteNo -= StringOffset;
}
while (true) {
  assert(TokNo < getNumConcatenated() && "Invalid byte number!")(static_cast <bool> (TokNo < getNumConcatenated() &&
 "Invalid byte number!") ? void (0) : __assert_fail ("TokNo < getNumConcatenated() && \"Invalid byte number!\""
, "clang/lib/AST/Expr.cpp", 1333, __extension__ __PRETTY_FUNCTION__
));
  SourceLocation StrTokLoc = getStrTokenLoc(TokNo);

  // Get the spelling of the string so that we can get the data that makes up
  // the string literal, not the identifier for the macro it is potentially
  // expanded through.
  SourceLocation StrTokSpellingLoc = SM.getSpellingLoc(StrTokLoc);

  // Re-lex the token to get its length and original spelling.
  std::pair<FileID, unsigned> LocInfo =
      SM.getDecomposedLoc(StrTokSpellingLoc);
  bool Invalid = false;
  StringRef Buffer = SM.getBufferData(LocInfo.first, &Invalid);
  if (Invalid) {
    if (StartTokenByteOffset != nullptr)
      *StartTokenByteOffset = StringOffset;
    if (StartToken != nullptr)
      *StartToken = TokNo;
    return StrTokSpellingLoc;
  }

  const char *StrData = Buffer.data()+LocInfo.second;

  // Create a lexer starting at the beginning of this token.
  Lexer TheLexer(SM.getLocForStartOfFile(LocInfo.first), Features,
                 Buffer.begin(), StrData, Buffer.end());
  Token TheTok;
  TheLexer.LexFromRawLexer(TheTok);

  // Use the StringLiteralParser to compute the length of the string in bytes.
  StringLiteralParser SLP(TheTok, SM, Features, Target);
  unsigned TokNumBytes = SLP.GetStringLength();

  // If the byte is in this token, return the location of the byte.
  if (ByteNo < TokNumBytes ||
      (ByteNo == TokNumBytes && TokNo == getNumConcatenated() - 1)) {
    unsigned Offset = SLP.getOffsetOfStringByte(TheTok, ByteNo);

    // Now that we know the offset of the token in the spelling, use the
    // preprocessor to get the offset in the original source.
    if (StartTokenByteOffset != nullptr)
      *StartTokenByteOffset = StringOffset;
    if (StartToken != nullptr)
      *StartToken = TokNo;
    return Lexer::AdvanceToTokenCharacter(StrTokLoc, Offset, SM, Features);
  }

  // Move to the next string token.
  StringOffset += TokNumBytes;
  ++TokNo;
  ByteNo -= TokNumBytes;
}
1385}

1387/// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
1388/// corresponds to, e.g. "sizeof" or "[pre]++".
1389StringRef UnaryOperator::getOpcodeStr(Opcode Op) {
switch (Op) {
1391#define UNARY_OPERATION(Name, Spelling) case UO_##Name: return Spelling;
1392#include "clang/AST/OperationKinds.def"
}
llvm_unreachable("Unknown unary operator")::llvm::llvm_unreachable_internal("Unknown unary operator", "clang/lib/AST/Expr.cpp"
, 1394);
1395}

1397UnaryOperatorKind
1398UnaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix) {
switch (OO) {
default: llvm_unreachable("No unary operator for overloaded function")::llvm::llvm_unreachable_internal("No unary operator for overloaded function"
, "clang/lib/AST/Expr.cpp", 1400);
case OO_PlusPlus:   return Postfix ? UO_PostInc : UO_PreInc;
case OO_MinusMinus: return Postfix ? UO_PostDec : UO_PreDec;
case OO_Amp:        return UO_AddrOf;
case OO_Star:       return UO_Deref;
case OO_Plus:       return UO_Plus;
case OO_Minus:      return UO_Minus;
case OO_Tilde:      return UO_Not;
case OO_Exclaim:    return UO_LNot;
case OO_Coawait:    return UO_Coawait;
}
1411}

1413OverloadedOperatorKind UnaryOperator::getOverloadedOperator(Opcode Opc) {
switch (Opc) {
case UO_PostInc: case UO_PreInc: return OO_PlusPlus;
case UO_PostDec: case UO_PreDec: return OO_MinusMinus;
case UO_AddrOf: return OO_Amp;
case UO_Deref: return OO_Star;
case UO_Plus: return OO_Plus;
case UO_Minus: return OO_Minus;
case UO_Not: return OO_Tilde;
case UO_LNot: return OO_Exclaim;
case UO_Coawait: return OO_Coawait;
default: return OO_None;
}
1426}


1429//===----------------------------------------------------------------------===//
1430// Postfix Operators.
1431//===----------------------------------------------------------------------===//

1433CallExpr::CallExpr(StmtClass SC, Expr *Fn, ArrayRef<Expr *> PreArgs,
                 ArrayRef<Expr *> Args, QualType Ty, ExprValueKind VK,
                 SourceLocation RParenLoc, FPOptionsOverride FPFeatures,
                 unsigned MinNumArgs, ADLCallKind UsesADL)
  : Expr(SC, Ty, VK, OK_Ordinary), RParenLoc(RParenLoc) {
NumArgs = std::max<unsigned>(Args.size(), MinNumArgs);
unsigned NumPreArgs = PreArgs.size();
CallExprBits.NumPreArgs = NumPreArgs;
assert((NumPreArgs == getNumPreArgs()) && "NumPreArgs overflow!")(static_cast <bool> ((NumPreArgs == getNumPreArgs()) &&
 "NumPreArgs overflow!") ? void (0) : __assert_fail ("(NumPreArgs == getNumPreArgs()) && \"NumPreArgs overflow!\""
, "clang/lib/AST/Expr.cpp", 1441, __extension__ __PRETTY_FUNCTION__
));

unsigned OffsetToTrailingObjects = offsetToTrailingObjects(SC);
CallExprBits.OffsetToTrailingObjects = OffsetToTrailingObjects;
assert((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) &&(static_cast <bool> ((CallExprBits.OffsetToTrailingObjects
 == OffsetToTrailingObjects) && "OffsetToTrailingObjects overflow!"
) ? void (0) : __assert_fail ("(CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) && \"OffsetToTrailingObjects overflow!\""
, "clang/lib/AST/Expr.cpp", 1446, __extension__ __PRETTY_FUNCTION__
))
       "OffsetToTrailingObjects overflow!")(static_cast <bool> ((CallExprBits.OffsetToTrailingObjects
 == OffsetToTrailingObjects) && "OffsetToTrailingObjects overflow!"
) ? void (0) : __assert_fail ("(CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) && \"OffsetToTrailingObjects overflow!\""
, "clang/lib/AST/Expr.cpp", 1446, __extension__ __PRETTY_FUNCTION__
));

CallExprBits.UsesADL = static_cast<bool>(UsesADL);

setCallee(Fn);
for (unsigned I = 0; I != NumPreArgs; ++I)
  setPreArg(I, PreArgs[I]);
for (unsigned I = 0; I != Args.size(); ++I)
  setArg(I, Args[I]);
for (unsigned I = Args.size(); I != NumArgs; ++I)
  setArg(I, nullptr);

this->computeDependence();

CallExprBits.HasFPFeatures = FPFeatures.requiresTrailingStorage();
if (hasStoredFPFeatures())
  setStoredFPFeatures(FPFeatures);
1463}

1465CallExpr::CallExpr(StmtClass SC, unsigned NumPreArgs, unsigned NumArgs,
                 bool HasFPFeatures, EmptyShell Empty)
  : Expr(SC, Empty), NumArgs(NumArgs) {
CallExprBits.NumPreArgs = NumPreArgs;
assert((NumPreArgs == getNumPreArgs()) && "NumPreArgs overflow!")(static_cast <bool> ((NumPreArgs == getNumPreArgs()) &&
 "NumPreArgs overflow!") ? void (0) : __assert_fail ("(NumPreArgs == getNumPreArgs()) && \"NumPreArgs overflow!\""
, "clang/lib/AST/Expr.cpp", 1469, __extension__ __PRETTY_FUNCTION__
));

unsigned OffsetToTrailingObjects = offsetToTrailingObjects(SC);
CallExprBits.OffsetToTrailingObjects = OffsetToTrailingObjects;
assert((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) &&(static_cast <bool> ((CallExprBits.OffsetToTrailingObjects
 == OffsetToTrailingObjects) && "OffsetToTrailingObjects overflow!"
) ? void (0) : __assert_fail ("(CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) && \"OffsetToTrailingObjects overflow!\""
, "clang/lib/AST/Expr.cpp", 1474, __extension__ __PRETTY_FUNCTION__
))
       "OffsetToTrailingObjects overflow!")(static_cast <bool> ((CallExprBits.OffsetToTrailingObjects
 == OffsetToTrailingObjects) && "OffsetToTrailingObjects overflow!"
) ? void (0) : __assert_fail ("(CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) && \"OffsetToTrailingObjects overflow!\""
, "clang/lib/AST/Expr.cpp", 1474, __extension__ __PRETTY_FUNCTION__
));
CallExprBits.HasFPFeatures = HasFPFeatures;
1476}

1478CallExpr *CallExpr::Create(const ASTContext &Ctx, Expr *Fn,
                         ArrayRef<Expr *> Args, QualType Ty, ExprValueKind VK,
                         SourceLocation RParenLoc,
                         FPOptionsOverride FPFeatures, unsigned MinNumArgs,
                         ADLCallKind UsesADL) {
unsigned NumArgs = std::max<unsigned>(Args.size(), MinNumArgs);
unsigned SizeOfTrailingObjects = CallExpr::sizeOfTrailingObjects(
    /*NumPreArgs=*/0, NumArgs, FPFeatures.requiresTrailingStorage());
void *Mem =
    Ctx.Allocate(sizeof(CallExpr) + SizeOfTrailingObjects, alignof(CallExpr));
return new (Mem) CallExpr(CallExprClass, Fn, /*PreArgs=*/{}, Args, Ty, VK,
                          RParenLoc, FPFeatures, MinNumArgs, UsesADL);
1490}

1492CallExpr *CallExpr::CreateTemporary(void *Mem, Expr *Fn, QualType Ty,
                                  ExprValueKind VK, SourceLocation RParenLoc,
                                  ADLCallKind UsesADL) {
assert(!(reinterpret_cast<uintptr_t>(Mem) % alignof(CallExpr)) &&(static_cast <bool> (!(reinterpret_cast<uintptr_t>
(Mem) % alignof(CallExpr)) && "Misaligned memory in CallExpr::CreateTemporary!"
) ? void (0) : __assert_fail ("!(reinterpret_cast<uintptr_t>(Mem) % alignof(CallExpr)) && \"Misaligned memory in CallExpr::CreateTemporary!\""
, "clang/lib/AST/Expr.cpp", 1496, __extension__ __PRETTY_FUNCTION__
))
       "Misaligned memory in CallExpr::CreateTemporary!")(static_cast <bool> (!(reinterpret_cast<uintptr_t>
(Mem) % alignof(CallExpr)) && "Misaligned memory in CallExpr::CreateTemporary!"
) ? void (0) : __assert_fail ("!(reinterpret_cast<uintptr_t>(Mem) % alignof(CallExpr)) && \"Misaligned memory in CallExpr::CreateTemporary!\""
, "clang/lib/AST/Expr.cpp", 1496, __extension__ __PRETTY_FUNCTION__
));
return new (Mem) CallExpr(CallExprClass, Fn, /*PreArgs=*/{}, /*Args=*/{}, Ty,
                          VK, RParenLoc, FPOptionsOverride(),
                          /*MinNumArgs=*/0, UsesADL);
1500}

1502CallExpr *CallExpr::CreateEmpty(const ASTContext &Ctx, unsigned NumArgs,
                              bool HasFPFeatures, EmptyShell Empty) {
unsigned SizeOfTrailingObjects =
    CallExpr::sizeOfTrailingObjects(/*NumPreArgs=*/0, NumArgs, HasFPFeatures);
void *Mem =
    Ctx.Allocate(sizeof(CallExpr) + SizeOfTrailingObjects, alignof(CallExpr));
return new (Mem)
    CallExpr(CallExprClass, /*NumPreArgs=*/0, NumArgs, HasFPFeatures, Empty);
1510}

1512unsigned CallExpr::offsetToTrailingObjects(StmtClass SC) {
switch (SC) {
case CallExprClass:
  return sizeof(CallExpr);
case CXXOperatorCallExprClass:
  return sizeof(CXXOperatorCallExpr);
case CXXMemberCallExprClass:
  return sizeof(CXXMemberCallExpr);
case UserDefinedLiteralClass:
  return sizeof(UserDefinedLiteral);
case CUDAKernelCallExprClass:
  return sizeof(CUDAKernelCallExpr);
default:
  llvm_unreachable("unexpected class deriving from CallExpr!")::llvm::llvm_unreachable_internal("unexpected class deriving from CallExpr!"
, "clang/lib/AST/Expr.cpp", 1525);
}
1527}

1529Decl *Expr::getReferencedDeclOfCallee() {
Expr *CEE = IgnoreParenImpCasts();

while (SubstNonTypeTemplateParmExpr *NTTP =
           dyn_cast<SubstNonTypeTemplateParmExpr>(CEE)) {
  CEE = NTTP->getReplacement()->IgnoreParenImpCasts();
}

// If we're calling a dereference, look at the pointer instead.
while (true) {
  if (BinaryOperator *BO = dyn_cast<BinaryOperator>(CEE)) {
    if (BO->isPtrMemOp()) {
      CEE = BO->getRHS()->IgnoreParenImpCasts();
      continue;
    }
  } else if (UnaryOperator *UO = dyn_cast<UnaryOperator>(CEE)) {
    if (UO->getOpcode() == UO_Deref || UO->getOpcode() == UO_AddrOf ||
        UO->getOpcode() == UO_Plus) {
      CEE = UO->getSubExpr()->IgnoreParenImpCasts();
      continue;
    }
  }
  break;
}

if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CEE))
  return DRE->getDecl();
if (MemberExpr *ME = dyn_cast<MemberExpr>(CEE))
  return ME->getMemberDecl();
if (auto *BE = dyn_cast<BlockExpr>(CEE))
  return BE->getBlockDecl();

return nullptr;
1562}

1564/// If this is a call to a builtin, return the builtin ID. If not, return 0.
1565unsigned CallExpr::getBuiltinCallee() const {
auto *FDecl = getDirectCallee();
return FDecl ? FDecl->getBuiltinID() : 0;
1568}

1570bool CallExpr::isUnevaluatedBuiltinCall(const ASTContext &Ctx) const {
if (unsigned BI = getBuiltinCallee())
  return Ctx.BuiltinInfo.isUnevaluated(BI);
return false;
1574}

1576QualType CallExpr::getCallReturnType(const ASTContext &Ctx) const {
const Expr *Callee = getCallee();
QualType CalleeType = Callee->getType();
if (const auto *FnTypePtr = CalleeType->getAs<PointerType>()) {
  CalleeType = FnTypePtr->getPointeeType();
} else if (const auto *BPT = CalleeType->getAs<BlockPointerType>()) {
  CalleeType = BPT->getPointeeType();
} else if (CalleeType->isSpecificPlaceholderType(BuiltinType::BoundMember)) {
  if (isa<CXXPseudoDestructorExpr>(Callee->IgnoreParens()))
    return Ctx.VoidTy;

  if (isa<UnresolvedMemberExpr>(Callee->IgnoreParens()))
    return Ctx.DependentTy;

  // This should never be overloaded and so should never return null.
  CalleeType = Expr::findBoundMemberType(Callee);
  assert(!CalleeType.isNull())(static_cast <bool> (!CalleeType.isNull()) ? void (0) :
 __assert_fail ("!CalleeType.isNull()", "clang/lib/AST/Expr.cpp"
, 1592, __extension__ __PRETTY_FUNCTION__));
} else if (CalleeType->isDependentType() ||
           CalleeType->isSpecificPlaceholderType(BuiltinType::Overload)) {
  return Ctx.DependentTy;
}

const FunctionType *FnType = CalleeType->castAs<FunctionType>();
return FnType->getReturnType();
1600}

1602const Attr *CallExpr::getUnusedResultAttr(const ASTContext &Ctx) const {
// If the return type is a struct, union, or enum that is marked nodiscard,
// then return the return type attribute.
if (const TagDecl *TD = getCallReturnType(Ctx)->getAsTagDecl())
  if (const auto *A = TD->getAttr<WarnUnusedResultAttr>())
    return A;

for (const auto *TD = getCallReturnType(Ctx)->getAs<TypedefType>(); TD;
     TD = TD->desugar()->getAs<TypedefType>())
  if (const auto *A = TD->getDecl()->getAttr<WarnUnusedResultAttr>())
    return A;

// Otherwise, see if the callee is marked nodiscard and return that attribute
// instead.
const Decl *D = getCalleeDecl();
return D ? D->getAttr<WarnUnusedResultAttr>() : nullptr;
1618}

1620SourceLocation CallExpr::getBeginLoc() const {
if (isa<CXXOperatorCallExpr>(this))
  return cast<CXXOperatorCallExpr>(this)->getBeginLoc();

SourceLocation begin = getCallee()->getBeginLoc();
if (begin.isInvalid() && getNumArgs() > 0 && getArg(0))
  begin = getArg(0)->getBeginLoc();
return begin;
1628}
1629SourceLocation CallExpr::getEndLoc() const {
if (isa<CXXOperatorCallExpr>(this))
  return cast<CXXOperatorCallExpr>(this)->getEndLoc();

SourceLocation end = getRParenLoc();
if (end.isInvalid() && getNumArgs() > 0 && getArg(getNumArgs() - 1))
  end = getArg(getNumArgs() - 1)->getEndLoc();
return end;
1637}

1639OffsetOfExpr *OffsetOfExpr::Create(const ASTContext &C, QualType type,
                                 SourceLocation OperatorLoc,
                                 TypeSourceInfo *tsi,
                                 ArrayRef<OffsetOfNode> comps,
                                 ArrayRef<Expr*> exprs,
                                 SourceLocation RParenLoc) {
void *Mem = C.Allocate(
    totalSizeToAlloc<OffsetOfNode, Expr *>(comps.size(), exprs.size()));

return new (Mem) OffsetOfExpr(C, type, OperatorLoc, tsi, comps, exprs,
                              RParenLoc);
1650}

1652OffsetOfExpr *OffsetOfExpr::CreateEmpty(const ASTContext &C,
                                      unsigned numComps, unsigned numExprs) {
void *Mem =
    C.Allocate(totalSizeToAlloc<OffsetOfNode, Expr *>(numComps, numExprs));
return new (Mem) OffsetOfExpr(numComps, numExprs);
1657}

1659OffsetOfExpr::OffsetOfExpr(const ASTContext &C, QualType type,
                         SourceLocation OperatorLoc, TypeSourceInfo *tsi,
                         ArrayRef<OffsetOfNode> comps, ArrayRef<Expr *> exprs,
                         SourceLocation RParenLoc)
  : Expr(OffsetOfExprClass, type, VK_PRValue, OK_Ordinary),
    OperatorLoc(OperatorLoc), RParenLoc(RParenLoc), TSInfo(tsi),
    NumComps(comps.size()), NumExprs(exprs.size()) {
for (unsigned i = 0; i != comps.size(); ++i)
  setComponent(i, comps[i]);
for (unsigned i = 0; i != exprs.size(); ++i)
  setIndexExpr(i, exprs[i]);

setDependence(computeDependence(this));
1672}

1674IdentifierInfo *OffsetOfNode::getFieldName() const {
assert(getKind() == Field || getKind() == Identifier)(static_cast <bool> (getKind() == Field || getKind() ==
 Identifier) ? void (0) : __assert_fail ("getKind() == Field || getKind() == Identifier"
, "clang/lib/AST/Expr.cpp", 1675, __extension__ __PRETTY_FUNCTION__
));
if (getKind() == Field)
  return getField()->getIdentifier();

return reinterpret_cast<IdentifierInfo *> (Data & ~(uintptr_t)Mask);
1680}

1682UnaryExprOrTypeTraitExpr::UnaryExprOrTypeTraitExpr(
  UnaryExprOrTypeTrait ExprKind, Expr *E, QualType resultType,
  SourceLocation op, SourceLocation rp)
  : Expr(UnaryExprOrTypeTraitExprClass, resultType, VK_PRValue, OK_Ordinary),
    OpLoc(op), RParenLoc(rp) {
assert(ExprKind <= UETT_Last && "invalid enum value!")(static_cast <bool> (ExprKind <= UETT_Last &&
 "invalid enum value!") ? void (0) : __assert_fail ("ExprKind <= UETT_Last && \"invalid enum value!\""
, "clang/lib/AST/Expr.cpp", 1687, __extension__ __PRETTY_FUNCTION__
));
UnaryExprOrTypeTraitExprBits.Kind = ExprKind;
assert(static_cast<unsigned>(ExprKind) == UnaryExprOrTypeTraitExprBits.Kind &&(static_cast <bool> (static_cast<unsigned>(ExprKind
) == UnaryExprOrTypeTraitExprBits.Kind && "UnaryExprOrTypeTraitExprBits.Kind overflow!"
) ? void (0) : __assert_fail ("static_cast<unsigned>(ExprKind) == UnaryExprOrTypeTraitExprBits.Kind && \"UnaryExprOrTypeTraitExprBits.Kind overflow!\""
, "clang/lib/AST/Expr.cpp", 1690, __extension__ __PRETTY_FUNCTION__
))
       "UnaryExprOrTypeTraitExprBits.Kind overflow!")(static_cast <bool> (static_cast<unsigned>(ExprKind
) == UnaryExprOrTypeTraitExprBits.Kind && "UnaryExprOrTypeTraitExprBits.Kind overflow!"
) ? void (0) : __assert_fail ("static_cast<unsigned>(ExprKind) == UnaryExprOrTypeTraitExprBits.Kind && \"UnaryExprOrTypeTraitExprBits.Kind overflow!\""
, "clang/lib/AST/Expr.cpp", 1690, __extension__ __PRETTY_FUNCTION__
));
UnaryExprOrTypeTraitExprBits.IsType = false;
Argument.Ex = E;
setDependence(computeDependence(this));
1694}

1696MemberExpr::MemberExpr(Expr *Base, bool IsArrow, SourceLocation OperatorLoc,
                     ValueDecl *MemberDecl,
                     const DeclarationNameInfo &NameInfo, QualType T,
                     ExprValueKind VK, ExprObjectKind OK,
                     NonOdrUseReason NOUR)
  : Expr(MemberExprClass, T, VK, OK), Base(Base), MemberDecl(MemberDecl),
    MemberDNLoc(NameInfo.getInfo()), MemberLoc(NameInfo.getLoc()) {
assert(!NameInfo.getName() ||(static_cast <bool> (!NameInfo.getName() || MemberDecl->
getDeclName() == NameInfo.getName()) ? void (0) : __assert_fail
 ("!NameInfo.getName() || MemberDecl->getDeclName() == NameInfo.getName()"
, "clang/lib/AST/Expr.cpp", 1704, __extension__ __PRETTY_FUNCTION__
))
       MemberDecl->getDeclName() == NameInfo.getName())(static_cast <bool> (!NameInfo.getName() || MemberDecl->
getDeclName() == NameInfo.getName()) ? void (0) : __assert_fail
 ("!NameInfo.getName() || MemberDecl->getDeclName() == NameInfo.getName()"
, "clang/lib/AST/Expr.cpp", 1704, __extension__ __PRETTY_FUNCTION__
));
MemberExprBits.IsArrow = IsArrow;
MemberExprBits.HasQualifierOrFoundDecl = false;
MemberExprBits.HasTemplateKWAndArgsInfo = false;
MemberExprBits.HadMultipleCandidates = false;
MemberExprBits.NonOdrUseReason = NOUR;
MemberExprBits.OperatorLoc = OperatorLoc;
setDependence(computeDependence(this));
1712}

1714MemberExpr *MemberExpr::Create(
  const ASTContext &C, Expr *Base, bool IsArrow, SourceLocation OperatorLoc,
  NestedNameSpecifierLoc QualifierLoc, SourceLocation TemplateKWLoc,
  ValueDecl *MemberDecl, DeclAccessPair FoundDecl,
  DeclarationNameInfo NameInfo, const TemplateArgumentListInfo *TemplateArgs,
  QualType T, ExprValueKind VK, ExprObjectKind OK, NonOdrUseReason NOUR) {
bool HasQualOrFound = QualifierLoc || FoundDecl.getDecl() != MemberDecl ||
                      FoundDecl.getAccess() != MemberDecl->getAccess();
bool HasTemplateKWAndArgsInfo = TemplateArgs || TemplateKWLoc.isValid();
std::size_t Size =
    totalSizeToAlloc<MemberExprNameQualifier, ASTTemplateKWAndArgsInfo,
                     TemplateArgumentLoc>(
        HasQualOrFound ? 1 : 0, HasTemplateKWAndArgsInfo ? 1 : 0,
        TemplateArgs ? TemplateArgs->size() : 0);

void *Mem = C.Allocate(Size, alignof(MemberExpr));
MemberExpr *E = new (Mem) MemberExpr(Base, IsArrow, OperatorLoc, MemberDecl,
                                     NameInfo, T, VK, OK, NOUR);

// FIXME: remove remaining dependence computation to computeDependence().
auto Deps = E->getDependence();
if (HasQualOrFound) {
  // FIXME: Wrong. We should be looking at the member declaration we found.
  if (QualifierLoc && QualifierLoc.getNestedNameSpecifier()->isDependent())
    Deps |= ExprDependence::TypeValueInstantiation;
  else if (QualifierLoc &&
           QualifierLoc.getNestedNameSpecifier()->isInstantiationDependent())
    Deps |= ExprDependence::Instantiation;

  E->MemberExprBits.HasQualifierOrFoundDecl = true;

  MemberExprNameQualifier *NQ =
      E->getTrailingObjects<MemberExprNameQualifier>();
  NQ->QualifierLoc = QualifierLoc;
  NQ->FoundDecl = FoundDecl;
}

E->MemberExprBits.HasTemplateKWAndArgsInfo =
    TemplateArgs || TemplateKWLoc.isValid();

if (TemplateArgs) {
  auto TemplateArgDeps = TemplateArgumentDependence::None;
  E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
      TemplateKWLoc, *TemplateArgs,
      E->getTrailingObjects<TemplateArgumentLoc>(), TemplateArgDeps);
  if (TemplateArgDeps & TemplateArgumentDependence::Instantiation)
    Deps |= ExprDependence::Instantiation;
} else if (TemplateKWLoc.isValid()) {
  E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
      TemplateKWLoc);
}
E->setDependence(Deps);

return E;
1768}

1770MemberExpr *MemberExpr::CreateEmpty(const ASTContext &Context,
                                  bool HasQualifier, bool HasFoundDecl,
                                  bool HasTemplateKWAndArgsInfo,
                                  unsigned NumTemplateArgs) {
assert((!NumTemplateArgs || HasTemplateKWAndArgsInfo) &&(static_cast <bool> ((!NumTemplateArgs || HasTemplateKWAndArgsInfo
) && "template args but no template arg info?") ? void
 (0) : __assert_fail ("(!NumTemplateArgs || HasTemplateKWAndArgsInfo) && \"template args but no template arg info?\""
, "clang/lib/AST/Expr.cpp", 1775, __extension__ __PRETTY_FUNCTION__
))
       "template args but no template arg info?")(static_cast <bool> ((!NumTemplateArgs || HasTemplateKWAndArgsInfo
) && "template args but no template arg info?") ? void
 (0) : __assert_fail ("(!NumTemplateArgs || HasTemplateKWAndArgsInfo) && \"template args but no template arg info?\""
, "clang/lib/AST/Expr.cpp", 1775, __extension__ __PRETTY_FUNCTION__
));
bool HasQualOrFound = HasQualifier || HasFoundDecl;
std::size_t Size =
    totalSizeToAlloc<MemberExprNameQualifier, ASTTemplateKWAndArgsInfo,
                     TemplateArgumentLoc>(HasQualOrFound ? 1 : 0,
                                          HasTemplateKWAndArgsInfo ? 1 : 0,
                                          NumTemplateArgs);
void *Mem = Context.Allocate(Size, alignof(MemberExpr));
return new (Mem) MemberExpr(EmptyShell());
1784}

1786void MemberExpr::setMemberDecl(ValueDecl *NewD) {
MemberDecl = NewD;
if (getType()->isUndeducedType())
  setType(NewD->getType());
setDependence(computeDependence(this));
1791}

1793SourceLocation MemberExpr::getBeginLoc() const {
if (isImplicitAccess()) {
  if (hasQualifier())
    return getQualifierLoc().getBeginLoc();
  return MemberLoc;
}

// FIXME: We don't want this to happen. Rather, we should be able to
// detect all kinds of implicit accesses more cleanly.
SourceLocation BaseStartLoc = getBase()->getBeginLoc();
if (BaseStartLoc.isValid())
  return BaseStartLoc;
return MemberLoc;
1806}
1807SourceLocation MemberExpr::getEndLoc() const {
SourceLocation EndLoc = getMemberNameInfo().getEndLoc();
if (hasExplicitTemplateArgs())
  EndLoc = getRAngleLoc();
else if (EndLoc.isInvalid())
  EndLoc = getBase()->getEndLoc();
return EndLoc;
1814}

1816bool CastExpr::CastConsistency() const {
switch (getCastKind()) {
case CK_DerivedToBase:
case CK_UncheckedDerivedToBase:
case CK_DerivedToBaseMemberPointer:
case CK_BaseToDerived:
case CK_BaseToDerivedMemberPointer:
  assert(!path_empty() && "Cast kind should have a base path!")(static_cast <bool> (!path_empty() && "Cast kind should have a base path!"
) ? void (0) : __assert_fail ("!path_empty() && \"Cast kind should have a base path!\""
, "clang/lib/AST/Expr.cpp", 1823, __extension__ __PRETTY_FUNCTION__
));
  break;

case CK_CPointerToObjCPointerCast:
  assert(getType()->isObjCObjectPointerType())(static_cast <bool> (getType()->isObjCObjectPointerType
()) ? void (0) : __assert_fail ("getType()->isObjCObjectPointerType()"
, "clang/lib/AST/Expr.cpp", 1827, __extension__ __PRETTY_FUNCTION__
));
  assert(getSubExpr()->getType()->isPointerType())(static_cast <bool> (getSubExpr()->getType()->isPointerType
()) ? void (0) : __assert_fail ("getSubExpr()->getType()->isPointerType()"
, "clang/lib/AST/Expr.cpp", 1828, __extension__ __PRETTY_FUNCTION__
));
  goto CheckNoBasePath;

case CK_BlockPointerToObjCPointerCast:
  assert(getType()->isObjCObjectPointerType())(static_cast <bool> (getType()->isObjCObjectPointerType
()) ? void (0) : __assert_fail ("getType()->isObjCObjectPointerType()"
, "clang/lib/AST/Expr.cpp", 1832, __extension__ __PRETTY_FUNCTION__
));
  assert(getSubExpr()->getType()->isBlockPointerType())(static_cast <bool> (getSubExpr()->getType()->isBlockPointerType
()) ? void (0) : __assert_fail ("getSubExpr()->getType()->isBlockPointerType()"
, "clang/lib/AST/Expr.cpp", 1833, __extension__ __PRETTY_FUNCTION__
));
  goto CheckNoBasePath;

case CK_ReinterpretMemberPointer:
  assert(getType()->isMemberPointerType())(static_cast <bool> (getType()->isMemberPointerType(
)) ? void (0) : __assert_fail ("getType()->isMemberPointerType()"
, "clang/lib/AST/Expr.cpp", 1837, __extension__ __PRETTY_FUNCTION__
));
  assert(getSubExpr()->getType()->isMemberPointerType())(static_cast <bool> (getSubExpr()->getType()->isMemberPointerType
()) ? void (0) : __assert_fail ("getSubExpr()->getType()->isMemberPointerType()"
, "clang/lib/AST/Expr.cpp", 1838, __extension__ __PRETTY_FUNCTION__
));
  goto CheckNoBasePath;

case CK_BitCast:
  // Arbitrary casts to C pointer types count as bitcasts.
  // Otherwise, we should only have block and ObjC pointer casts
  // here if they stay within the type kind.
  if (!getType()->isPointerType()) {
    assert(getType()->isObjCObjectPointerType() ==(static_cast <bool> (getType()->isObjCObjectPointerType
() == getSubExpr()->getType()->isObjCObjectPointerType(
)) ? void (0) : __assert_fail ("getType()->isObjCObjectPointerType() == getSubExpr()->getType()->isObjCObjectPointerType()"
, "clang/lib/AST/Expr.cpp", 1847, __extension__ __PRETTY_FUNCTION__
))
           getSubExpr()->getType()->isObjCObjectPointerType())(static_cast <bool> (getType()->isObjCObjectPointerType
() == getSubExpr()->getType()->isObjCObjectPointerType(
)) ? void (0) : __assert_fail ("getType()->isObjCObjectPointerType() == getSubExpr()->getType()->isObjCObjectPointerType()"
, "clang/lib/AST/Expr.cpp", 1847, __extension__ __PRETTY_FUNCTION__
));
    assert(getType()->isBlockPointerType() ==(static_cast <bool> (getType()->isBlockPointerType()
 == getSubExpr()->getType()->isBlockPointerType()) ? void
 (0) : __assert_fail ("getType()->isBlockPointerType() == getSubExpr()->getType()->isBlockPointerType()"
, "clang/lib/AST/Expr.cpp", 1849, __extension__ __PRETTY_FUNCTION__
))
           getSubExpr()->getType()->isBlockPointerType())(static_cast <bool> (getType()->isBlockPointerType()
 == getSubExpr()->getType()->isBlockPointerType()) ? void
 (0) : __assert_fail ("getType()->isBlockPointerType() == getSubExpr()->getType()->isBlockPointerType()"
, "clang/lib/AST/Expr.cpp", 1849, __extension__ __PRETTY_FUNCTION__
));
  }
  goto CheckNoBasePath;

case CK_AnyPointerToBlockPointerCast:
  assert(getType()->isBlockPointerType())(static_cast <bool> (getType()->isBlockPointerType()
) ? void (0) : __assert_fail ("getType()->isBlockPointerType()"
, "clang/lib/AST/Expr.cpp", 1854, __extension__ __PRETTY_FUNCTION__
));
  assert(getSubExpr()->getType()->isAnyPointerType() &&(static_cast <bool> (getSubExpr()->getType()->isAnyPointerType
() && !getSubExpr()->getType()->isBlockPointerType
()) ? void (0) : __assert_fail ("getSubExpr()->getType()->isAnyPointerType() && !getSubExpr()->getType()->isBlockPointerType()"
, "clang/lib/AST/Expr.cpp", 1856, __extension__ __PRETTY_FUNCTION__
))
         !getSubExpr()->getType()->isBlockPointerType())(static_cast <bool> (getSubExpr()->getType()->isAnyPointerType
() && !getSubExpr()->getType()->isBlockPointerType
()) ? void (0) : __assert_fail ("getSubExpr()->getType()->isAnyPointerType() && !getSubExpr()->getType()->isBlockPointerType()"
, "clang/lib/AST/Expr.cpp", 1856, __extension__ __PRETTY_FUNCTION__
));
  goto CheckNoBasePath;

case CK_CopyAndAutoreleaseBlockObject:
  assert(getType()->isBlockPointerType())(static_cast <bool> (getType()->isBlockPointerType()
) ? void (0) : __assert_fail ("getType()->isBlockPointerType()"
, "clang/lib/AST/Expr.cpp", 1860, __extension__ __PRETTY_FUNCTION__
));
  assert(getSubExpr()->getType()->isBlockPointerType())(static_cast <bool> (getSubExpr()->getType()->isBlockPointerType
()) ? void (0) : __assert_fail ("getSubExpr()->getType()->isBlockPointerType()"
, "clang/lib/AST/Expr.cpp", 1861, __extension__ __PRETTY_FUNCTION__
));
  goto CheckNoBasePath;

case CK_FunctionToPointerDecay:
  assert(getType()->isPointerType())(static_cast <bool> (getType()->isPointerType()) ? void
 (0) : __assert_fail ("getType()->isPointerType()", "clang/lib/AST/Expr.cpp"
, 1865, __extension__ __PRETTY_FUNCTION__));
  assert(getSubExpr()->getType()->isFunctionType())(static_cast <bool> (getSubExpr()->getType()->isFunctionType
()) ? void (0) : __assert_fail ("getSubExpr()->getType()->isFunctionType()"
, "clang/lib/AST/Expr.cpp", 1866, __extension__ __PRETTY_FUNCTION__
));
  goto CheckNoBasePath;

case CK_AddressSpaceConversion: {
  auto Ty = getType();
  auto SETy = getSubExpr()->getType();
  assert(getValueKindForType(Ty) == Expr::getValueKindForType(SETy))(static_cast <bool> (getValueKindForType(Ty) == Expr::getValueKindForType
(SETy)) ? void (0) : __assert_fail ("getValueKindForType(Ty) == Expr::getValueKindForType(SETy)"
, "clang/lib/AST/Expr.cpp", 1872, __extension__ __PRETTY_FUNCTION__
));
  if (isPRValue() && !Ty->isDependentType() && !SETy->isDependentType()) {
    Ty = Ty->getPointeeType();
    SETy = SETy->getPointeeType();
  }
  assert((Ty->isDependentType() || SETy->isDependentType()) ||(static_cast <bool> ((Ty->isDependentType() || SETy->
isDependentType()) || (!Ty.isNull() && !SETy.isNull()
 && Ty.getAddressSpace() != SETy.getAddressSpace())) ?
 void (0) : __assert_fail ("(Ty->isDependentType() || SETy->isDependentType()) || (!Ty.isNull() && !SETy.isNull() && Ty.getAddressSpace() != SETy.getAddressSpace())"
, "clang/lib/AST/Expr.cpp", 1879, __extension__ __PRETTY_FUNCTION__
))
         (!Ty.isNull() && !SETy.isNull() &&(static_cast <bool> ((Ty->isDependentType() || SETy->
isDependentType()) || (!Ty.isNull() && !SETy.isNull()
 && Ty.getAddressSpace() != SETy.getAddressSpace())) ?
 void (0) : __assert_fail ("(Ty->isDependentType() || SETy->isDependentType()) || (!Ty.isNull() && !SETy.isNull() && Ty.getAddressSpace() != SETy.getAddressSpace())"
, "clang/lib/AST/Expr.cpp", 1879, __extension__ __PRETTY_FUNCTION__
))
          Ty.getAddressSpace() != SETy.getAddressSpace()))(static_cast <bool> ((Ty->isDependentType() || SETy->
isDependentType()) || (!Ty.isNull() && !SETy.isNull()
 && Ty.getAddressSpace() != SETy.getAddressSpace())) ?
 void (0) : __assert_fail ("(Ty->isDependentType() || SETy->isDependentType()) || (!Ty.isNull() && !SETy.isNull() && Ty.getAddressSpace() != SETy.getAddressSpace())"
, "clang/lib/AST/Expr.cpp", 1879, __extension__ __PRETTY_FUNCTION__
));
  goto CheckNoBasePath;
}
// These should not have an inheritance path.
case CK_Dynamic:
case CK_ToUnion:
case CK_ArrayToPointerDecay:
case CK_NullToMemberPointer:
case CK_NullToPointer:
case CK_ConstructorConversion:
case CK_IntegralToPointer:
case CK_PointerToIntegral:
case CK_ToVoid:
case CK_VectorSplat:
case CK_IntegralCast:
case CK_BooleanToSignedIntegral:
case CK_IntegralToFloating:
case CK_FloatingToIntegral:
case CK_FloatingCast:
case CK_ObjCObjectLValueCast:
case CK_FloatingRealToComplex:
case CK_FloatingComplexToReal:
case CK_FloatingComplexCast:
case CK_FloatingComplexToIntegralComplex:
case CK_IntegralRealToComplex:
case CK_IntegralComplexToReal:
case CK_IntegralComplexCast:
case CK_IntegralComplexToFloatingComplex:
case CK_ARCProduceObject:
case CK_ARCConsumeObject:
case CK_ARCReclaimReturnedObject:
case CK_ARCExtendBlockObject:
case CK_ZeroToOCLOpaqueType:
case CK_IntToOCLSampler:
case CK_FloatingToFixedPoint:
case CK_FixedPointToFloating:
case CK_FixedPointCast:
case CK_FixedPointToIntegral:
case CK_IntegralToFixedPoint:
case CK_MatrixCast:
  assert(!getType()->isBooleanType() && "unheralded conversion to bool")(static_cast <bool> (!getType()->isBooleanType() &&
 "unheralded conversion to bool") ? void (0) : __assert_fail (
"!getType()->isBooleanType() && \"unheralded conversion to bool\""
, "clang/lib/AST/Expr.cpp", 1919, __extension__ __PRETTY_FUNCTION__
));
  goto CheckNoBasePath;

case CK_Dependent:
case CK_LValueToRValue:
case CK_NoOp:
case CK_AtomicToNonAtomic:
case CK_NonAtomicToAtomic:
case CK_PointerToBoolean:
case CK_IntegralToBoolean:
case CK_FloatingToBoolean:
case CK_MemberPointerToBoolean:
case CK_FloatingComplexToBoolean:
case CK_IntegralComplexToBoolean:
case CK_LValueBitCast:            // -> bool&
case CK_LValueToRValueBitCast:
case CK_UserDefinedConversion:    // operator bool()
case CK_BuiltinFnToFnPtr:
case CK_FixedPointToBoolean:
CheckNoBasePath:
  assert(path_empty() && "Cast kind should not have a base path!")(static_cast <bool> (path_empty() && "Cast kind should not have a base path!"
) ? void (0) : __assert_fail ("path_empty() && \"Cast kind should not have a base path!\""
, "clang/lib/AST/Expr.cpp", 1939, __extension__ __PRETTY_FUNCTION__
));
  break;
}
return true;
1943}

1945const char *CastExpr::getCastKindName(CastKind CK) {
switch (CK) {
1947#define CAST_OPERATION(Name) case CK_##Name: return #Name;
1948#include "clang/AST/OperationKinds.def"
}
llvm_unreachable("Unhandled cast kind!")::llvm::llvm_unreachable_internal("Unhandled cast kind!", "clang/lib/AST/Expr.cpp"
, 1950);
1951}

1953namespace {
1954// Skip over implicit nodes produced as part of semantic analysis.
1955// Designed for use with IgnoreExprNodes.
1956Expr *ignoreImplicitSemaNodes(Expr *E) {
if (auto *Materialize = dyn_cast<MaterializeTemporaryExpr>(E))
  return Materialize->getSubExpr();

if (auto *Binder = dyn_cast<CXXBindTemporaryExpr>(E))
  return Binder->getSubExpr();

if (auto *Full = dyn_cast<FullExpr>(E))
  return Full->getSubExpr();

if (auto *CPLIE = dyn_cast<CXXParenListInitExpr>(E);
    CPLIE && CPLIE->getInitExprs().size() == 1)
  return CPLIE->getInitExprs()[0];

return E;
1971}
1972} // namespace

1974Expr *CastExpr::getSubExprAsWritten() {
const Expr *SubExpr = nullptr;

for (const CastExpr *E = this; E; E = dyn_cast<ImplicitCastExpr>(SubExpr)) {
  SubExpr = IgnoreExprNodes(E->getSubExpr(), ignoreImplicitSemaNodes);

  // Conversions by constructor and conversion functions have a
  // subexpression describing the call; strip it off.
  if (E->getCastKind() == CK_ConstructorConversion) {
    SubExpr = IgnoreExprNodes(cast<CXXConstructExpr>(SubExpr)->getArg(0),
                              ignoreImplicitSemaNodes);
  } else if (E->getCastKind() == CK_UserDefinedConversion) {
    assert((isa<CXXMemberCallExpr>(SubExpr) || isa<BlockExpr>(SubExpr)) &&(static_cast <bool> ((isa<CXXMemberCallExpr>(SubExpr
) || isa<BlockExpr>(SubExpr)) && "Unexpected SubExpr for CK_UserDefinedConversion."
) ? void (0) : __assert_fail ("(isa<CXXMemberCallExpr>(SubExpr) || isa<BlockExpr>(SubExpr)) && \"Unexpected SubExpr for CK_UserDefinedConversion.\""
, "clang/lib/AST/Expr.cpp", 1987, __extension__ __PRETTY_FUNCTION__
))
           "Unexpected SubExpr for CK_UserDefinedConversion.")(static_cast <bool> ((isa<CXXMemberCallExpr>(SubExpr
) || isa<BlockExpr>(SubExpr)) && "Unexpected SubExpr for CK_UserDefinedConversion."
) ? void (0) : __assert_fail ("(isa<CXXMemberCallExpr>(SubExpr) || isa<BlockExpr>(SubExpr)) && \"Unexpected SubExpr for CK_UserDefinedConversion.\""
, "clang/lib/AST/Expr.cpp", 1987, __extension__ __PRETTY_FUNCTION__
));
    if (auto *MCE = dyn_cast<CXXMemberCallExpr>(SubExpr))
      SubExpr = MCE->getImplicitObjectArgument();
  }
}

return const_cast<Expr *>(SubExpr);
1994}

1996NamedDecl *CastExpr::getConversionFunction() const {
const Expr *SubExpr = nullptr;

for (const CastExpr *E = this; E; E = dyn_cast<ImplicitCastExpr>(SubExpr)) {
  SubExpr = IgnoreExprNodes(E->getSubExpr(), ignoreImplicitSemaNodes);

  if (E->getCastKind() == CK_ConstructorConversion)
    return cast<CXXConstructExpr>(SubExpr)->getConstructor();

  if (E->getCastKind() == CK_UserDefinedConversion) {
    if (auto *MCE = dyn_cast<CXXMemberCallExpr>(SubExpr))
      return MCE->getMethodDecl();
  }
}

return nullptr;
2012}

2014CXXBaseSpecifier **CastExpr::path_buffer() {
switch (getStmtClass()) {
2016#define ABSTRACT_STMT(x)
2017#define CASTEXPR(Type, Base)                                                   \
case Stmt::Type##Class:                                                      \
  return static_cast<Type *>(this)->getTrailingObjects<CXXBaseSpecifier *>();
2020#define STMT(Type, Base)
2021#include "clang/AST/StmtNodes.inc"
default:
  llvm_unreachable("non-cast expressions not possible here")::llvm::llvm_unreachable_internal("non-cast expressions not possible here"
, "clang/lib/AST/Expr.cpp", 2023);
}
2025}

2027const FieldDecl *CastExpr::getTargetFieldForToUnionCast(QualType unionType,
                                                      QualType opType) {
auto RD = unionType->castAs<RecordType>()->getDecl();
return getTargetFieldForToUnionCast(RD, opType);
2031}

2033const FieldDecl *CastExpr::getTargetFieldForToUnionCast(const RecordDecl *RD,
                                                      QualType OpType) {
auto &Ctx = RD->getASTContext();
RecordDecl::field_iterator Field, FieldEnd;
for (Field = RD->field_begin(), FieldEnd = RD->field_end();
     Field != FieldEnd; ++Field) {
  if (Ctx.hasSameUnqualifiedType(Field->getType(), OpType) &&
      !Field->isUnnamedBitfield()) {
    return *Field;
  }
}
return nullptr;
2045}

2047FPOptionsOverride *CastExpr::getTrailingFPFeatures() {
assert(hasStoredFPFeatures())(static_cast <bool> (hasStoredFPFeatures()) ? void (0) :
 __assert_fail ("hasStoredFPFeatures()", "clang/lib/AST/Expr.cpp"
, 2048, __extension__ __PRETTY_FUNCTION__));
switch (getStmtClass()) {
case ImplicitCastExprClass:
  return static_cast<ImplicitCastExpr *>(this)
      ->getTrailingObjects<FPOptionsOverride>();
case CStyleCastExprClass:
  return static_cast<CStyleCastExpr *>(this)
      ->getTrailingObjects<FPOptionsOverride>();
case CXXFunctionalCastExprClass:
  return static_cast<CXXFunctionalCastExpr *>(this)
      ->getTrailingObjects<FPOptionsOverride>();
case CXXStaticCastExprClass:
  return static_cast<CXXStaticCastExpr *>(this)
      ->getTrailingObjects<FPOptionsOverride>();
default:
  llvm_unreachable("Cast does not have FPFeatures")::llvm::llvm_unreachable_internal("Cast does not have FPFeatures"
, "clang/lib/AST/Expr.cpp", 2063);
}
2065}

2067ImplicitCastExpr *ImplicitCastExpr::Create(const ASTContext &C, QualType T,
                                         CastKind Kind, Expr *Operand,
                                         const CXXCastPath *BasePath,
                                         ExprValueKind VK,
                                         FPOptionsOverride FPO) {
unsigned PathSize = (BasePath ? BasePath->size() : 0);
void *Buffer =
    C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *, FPOptionsOverride>(
        PathSize, FPO.requiresTrailingStorage()));
// Per C++ [conv.lval]p3, lvalue-to-rvalue conversions on class and
// std::nullptr_t have special semantics not captured by CK_LValueToRValue.
assert((Kind != CK_LValueToRValue ||(static_cast <bool> ((Kind != CK_LValueToRValue || !(T->
isNullPtrType() || T->getAsCXXRecordDecl())) && "invalid type for lvalue-to-rvalue conversion"
) ? void (0) : __assert_fail ("(Kind != CK_LValueToRValue || !(T->isNullPtrType() || T->getAsCXXRecordDecl())) && \"invalid type for lvalue-to-rvalue conversion\""
, "clang/lib/AST/Expr.cpp", 2080, __extension__ __PRETTY_FUNCTION__
))
        !(T->isNullPtrType() || T->getAsCXXRecordDecl())) &&(static_cast <bool> ((Kind != CK_LValueToRValue || !(T->
isNullPtrType() || T->getAsCXXRecordDecl())) && "invalid type for lvalue-to-rvalue conversion"
) ? void (0) : __assert_fail ("(Kind != CK_LValueToRValue || !(T->isNullPtrType() || T->getAsCXXRecordDecl())) && \"invalid type for lvalue-to-rvalue conversion\""
, "clang/lib/AST/Expr.cpp", 2080, __extension__ __PRETTY_FUNCTION__
))
       "invalid type for lvalue-to-rvalue conversion")(static_cast <bool> ((Kind != CK_LValueToRValue || !(T->
isNullPtrType() || T->getAsCXXRecordDecl())) && "invalid type for lvalue-to-rvalue conversion"
) ? void (0) : __assert_fail ("(Kind != CK_LValueToRValue || !(T->isNullPtrType() || T->getAsCXXRecordDecl())) && \"invalid type for lvalue-to-rvalue conversion\""
, "clang/lib/AST/Expr.cpp", 2080, __extension__ __PRETTY_FUNCTION__
));
ImplicitCastExpr *E =
    new (Buffer) ImplicitCastExpr(T, Kind, Operand, PathSize, FPO, VK);
if (PathSize)
  std::uninitialized_copy_n(BasePath->data(), BasePath->size(),
                            E->getTrailingObjects<CXXBaseSpecifier *>());
return E;
2087}

2089ImplicitCastExpr *ImplicitCastExpr::CreateEmpty(const ASTContext &C,
                                              unsigned PathSize,
                                              bool HasFPFeatures) {
void *Buffer =
    C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *, FPOptionsOverride>(
        PathSize, HasFPFeatures));
return new (Buffer) ImplicitCastExpr(EmptyShell(), PathSize, HasFPFeatures);
2096}

2098CStyleCastExpr *CStyleCastExpr::Create(const ASTContext &C, QualType T,
                                     ExprValueKind VK, CastKind K, Expr *Op,
                                     const CXXCastPath *BasePath,
                                     FPOptionsOverride FPO,
                                     TypeSourceInfo *WrittenTy,
                                     SourceLocation L, SourceLocation R) {
unsigned PathSize = (BasePath ? BasePath->size() : 0);
void *Buffer =
    C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *, FPOptionsOverride>(
        PathSize, FPO.requiresTrailingStorage()));
CStyleCastExpr *E =
    new (Buffer) CStyleCastExpr(T, VK, K, Op, PathSize, FPO, WrittenTy, L, R);
if (PathSize)
  std::uninitialized_copy_n(BasePath->data(), BasePath->size(),
                            E->getTrailingObjects<CXXBaseSpecifier *>());
return E;
2114}

2116CStyleCastExpr *CStyleCastExpr::CreateEmpty(const ASTContext &C,
                                          unsigned PathSize,
                                          bool HasFPFeatures) {
void *Buffer =
    C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *, FPOptionsOverride>(
        PathSize, HasFPFeatures));
return new (Buffer) CStyleCastExpr(EmptyShell(), PathSize, HasFPFeatures);
2123}

2125/// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
2126/// corresponds to, e.g. "<<=".
2127StringRef BinaryOperator::getOpcodeStr(Opcode Op) {
switch (Op) {
2129#define BINARY_OPERATION(Name, Spelling) case BO_##Name: return Spelling;
2130#include "clang/AST/OperationKinds.def"
}
llvm_unreachable("Invalid OpCode!")::llvm::llvm_unreachable_internal("Invalid OpCode!", "clang/lib/AST/Expr.cpp"
, 2132);
2133}

2135BinaryOperatorKind
2136BinaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO) {
switch (OO) {
default: llvm_unreachable("Not an overloadable binary operator")::llvm::llvm_unreachable_internal("Not an overloadable binary operator"
, "clang/lib/AST/Expr.cpp", 2138);
case OO_Plus: return BO_Add;
case OO_Minus: return BO_Sub;
case OO_Star: return BO_Mul;
case OO_Slash: return BO_Div;
case OO_Percent: return BO_Rem;
case OO_Caret: return BO_Xor;
case OO_Amp: return BO_And;
case OO_Pipe: return BO_Or;
case OO_Equal: return BO_Assign;
case OO_Spaceship: return BO_Cmp;
case OO_Less: return BO_LT;
case OO_Greater: return BO_GT;
case OO_PlusEqual: return BO_AddAssign;
case OO_MinusEqual: return BO_SubAssign;
case OO_StarEqual: return BO_MulAssign;
case OO_SlashEqual: return BO_DivAssign;
case OO_PercentEqual: return BO_RemAssign;
case OO_CaretEqual: return BO_XorAssign;
case OO_AmpEqual: return BO_AndAssign;
case OO_PipeEqual: return BO_OrAssign;
case OO_LessLess: return BO_Shl;
case OO_GreaterGreater: return BO_Shr;
case OO_LessLessEqual: return BO_ShlAssign;
case OO_GreaterGreaterEqual: return BO_ShrAssign;
case OO_EqualEqual: return BO_EQ;
case OO_ExclaimEqual: return BO_NE;
case OO_LessEqual: return BO_LE;
case OO_GreaterEqual: return BO_GE;
case OO_AmpAmp: return BO_LAnd;
case OO_PipePipe: return BO_LOr;
case OO_Comma: return BO_Comma;
case OO_ArrowStar: return BO_PtrMemI;
}
2172}

2174OverloadedOperatorKind BinaryOperator::getOverloadedOperator(Opcode Opc) {
static const OverloadedOperatorKind OverOps[] = {
  /* .* Cannot be overloaded */OO_None, OO_ArrowStar,
  OO_Star, OO_Slash, OO_Percent,
  OO_Plus, OO_Minus,
  OO_LessLess, OO_GreaterGreater,
  OO_Spaceship,
  OO_Less, OO_Greater, OO_LessEqual, OO_GreaterEqual,
  OO_EqualEqual, OO_ExclaimEqual,
  OO_Amp,
  OO_Caret,
  OO_Pipe,
  OO_AmpAmp,
  OO_PipePipe,
  OO_Equal, OO_StarEqual,
  OO_SlashEqual, OO_PercentEqual,
  OO_PlusEqual, OO_MinusEqual,
  OO_LessLessEqual, OO_GreaterGreaterEqual,
  OO_AmpEqual, OO_CaretEqual,
  OO_PipeEqual,
  OO_Comma
};
return OverOps[Opc];
2197}

2199bool BinaryOperator::isNullPointerArithmeticExtension(ASTContext &Ctx,
                                                    Opcode Opc,
                                                    Expr *LHS, Expr *RHS) {
if (Opc != BO_Add)
  return false;

// Check that we have one pointer and one integer operand.
Expr *PExp;
if (LHS->getType()->isPointerType()) {
  if (!RHS->getType()->isIntegerType())
    return false;
  PExp = LHS;
} else if (RHS->getType()->isPointerType()) {
  if (!LHS->getType()->isIntegerType())
    return false;
  PExp = RHS;
} else {
  return false;
}

// Check that the pointer is a nullptr.
if (!PExp->IgnoreParenCasts()
        ->isNullPointerConstant(Ctx, Expr::NPC_ValueDependentIsNotNull))
  return false;

// Check that the pointee type is char-sized.
const PointerType *PTy = PExp->getType()->getAs<PointerType>();
if (!PTy || !PTy->getPointeeType()->isCharType())
  return false;

return true;
2230}

2232SourceLocExpr::SourceLocExpr(const ASTContext &Ctx, IdentKind Kind,
                           QualType ResultTy, SourceLocation BLoc,
                           SourceLocation RParenLoc,
                           DeclContext *ParentContext)
  : Expr(SourceLocExprClass, ResultTy, VK_PRValue, OK_Ordinary),
    BuiltinLoc(BLoc), RParenLoc(RParenLoc), ParentContext(ParentContext) {
SourceLocExprBits.Kind = Kind;
setDependence(ExprDependence::None);
2240}

2242StringRef SourceLocExpr::getBuiltinStr() const {
switch (getIdentKind()) {
case File:
  return "__builtin_FILE";
case FileName:
  return "__builtin_FILE_NAME";
case Function:
  return "__builtin_FUNCTION";
case Line:
  return "__builtin_LINE";
case Column:
  return "__builtin_COLUMN";
case SourceLocStruct:
  return "__builtin_source_location";
}
llvm_unreachable("unexpected IdentKind!")::llvm::llvm_unreachable_internal("unexpected IdentKind!", "clang/lib/AST/Expr.cpp"
, 2257);
2258}

2260APValue SourceLocExpr::EvaluateInContext(const ASTContext &Ctx,
                                       const Expr *DefaultExpr) const {
SourceLocation Loc;
const DeclContext *Context;

std::tie(Loc,
         Context) = [&]() -> std::pair<SourceLocation, const DeclContext *> {
  if (auto *DIE = dyn_cast_or_null<CXXDefaultInitExpr>(DefaultExpr))
    return {DIE->getUsedLocation(), DIE->getUsedContext()};
  if (auto *DAE = dyn_cast_or_null<CXXDefaultArgExpr>(DefaultExpr))
    return {DAE->getUsedLocation(), DAE->getUsedContext()};
  return {this->getLocation(), this->getParentContext()};
}();

PresumedLoc PLoc = Ctx.getSourceManager().getPresumedLoc(
    Ctx.getSourceManager().getExpansionRange(Loc).getEnd());

auto MakeStringLiteral = [&](StringRef Tmp) {
  using LValuePathEntry = APValue::LValuePathEntry;
  StringLiteral *Res = Ctx.getPredefinedStringLiteralFromCache(Tmp);
  // Decay the string to a pointer to the first character.
  LValuePathEntry Path[1] = {LValuePathEntry::ArrayIndex(0)};
  return APValue(Res, CharUnits::Zero(), Path, /*OnePastTheEnd=*/false);
};

switch (getIdentKind()) {
case SourceLocExpr::FileName: {
  // __builtin_FILE_NAME() is a Clang-specific extension that expands to the
  // the last part of __builtin_FILE().
  SmallString<256> FileName;
  clang::Preprocessor::processPathToFileName(
      FileName, PLoc, Ctx.getLangOpts(), Ctx.getTargetInfo());
  return MakeStringLiteral(FileName);
}
case SourceLocExpr::File: {
  SmallString<256> Path(PLoc.getFilename());
  clang::Preprocessor::processPathForFileMacro(Path, Ctx.getLangOpts(),
                                               Ctx.getTargetInfo());
  return MakeStringLiteral(Path);
}
case SourceLocExpr::Function: {
  const auto *CurDecl = dyn_cast<Decl>(Context);
  return MakeStringLiteral(
      CurDecl ? PredefinedExpr::ComputeName(PredefinedExpr::Function, CurDecl)
              : std::string(""));
}
case SourceLocExpr::Line:
case SourceLocExpr::Column: {
  llvm::APSInt IntVal(Ctx.getIntWidth(Ctx.UnsignedIntTy),
                      /*isUnsigned=*/true);
  IntVal = getIdentKind() == SourceLocExpr::Line ? PLoc.getLine()
                                                 : PLoc.getColumn();
  return APValue(IntVal);
}
case SourceLocExpr::SourceLocStruct: {
  // Fill in a std::source_location::__impl structure, by creating an
  // artificial file-scoped CompoundLiteralExpr, and returning a pointer to
  // that.
  const CXXRecordDecl *ImplDecl = getType()->getPointeeCXXRecordDecl();
  assert(ImplDecl)(static_cast <bool> (ImplDecl) ? void (0) : __assert_fail
 ("ImplDecl", "clang/lib/AST/Expr.cpp", 2319, __extension__ __PRETTY_FUNCTION__
));

  // Construct an APValue for the __impl struct, and get or create a Decl
  // corresponding to that. Note that we've already verified that the shape of
  // the ImplDecl type is as expected.

  APValue Value(APValue::UninitStruct(), 0, 4);
  for (FieldDecl *F : ImplDecl->fields()) {
    StringRef Name = F->getName();
    if (Name == "_M_file_name") {
      SmallString<256> Path(PLoc.getFilename());
      clang::Preprocessor::processPathForFileMacro(Path, Ctx.getLangOpts(),
                                                   Ctx.getTargetInfo());
      Value.getStructField(F->getFieldIndex()) = MakeStringLiteral(Path);
    } else if (Name == "_M_function_name") {
      // Note: this emits the PrettyFunction name -- different than what
      // __builtin_FUNCTION() above returns!
      const auto *CurDecl = dyn_cast<Decl>(Context);
      Value.getStructField(F->getFieldIndex()) = MakeStringLiteral(
          CurDecl && !isa<TranslationUnitDecl>(CurDecl)
              ? StringRef(PredefinedExpr::ComputeName(
                    PredefinedExpr::PrettyFunction, CurDecl))
              : "");
    } else if (Name == "_M_line") {
      QualType Ty = F->getType();
      llvm::APSInt IntVal(Ctx.getIntWidth(Ty),
                          Ty->hasUnsignedIntegerRepresentation());
      IntVal = PLoc.getLine();
      Value.getStructField(F->getFieldIndex()) = APValue(IntVal);
    } else if (Name == "_M_column") {
      QualType Ty = F->getType();
      llvm::APSInt IntVal(Ctx.getIntWidth(Ty),
                          Ty->hasUnsignedIntegerRepresentation());
      IntVal = PLoc.getColumn();
      Value.getStructField(F->getFieldIndex()) = APValue(IntVal);
    }
  }

  UnnamedGlobalConstantDecl *GV =
      Ctx.getUnnamedGlobalConstantDecl(getType()->getPointeeType(), Value);

  return APValue(GV, CharUnits::Zero(), ArrayRef<APValue::LValuePathEntry>{},
                 false);
}
}
llvm_unreachable("unhandled case")::llvm::llvm_unreachable_internal("unhandled case", "clang/lib/AST/Expr.cpp"
, 2364);
2365}

2367InitListExpr::InitListExpr(const ASTContext &C, SourceLocation lbraceloc,
                         ArrayRef<Expr *> initExprs, SourceLocation rbraceloc)
  : Expr(InitListExprClass, QualType(), VK_PRValue, OK_Ordinary),
    InitExprs(C, initExprs.size()), LBraceLoc(lbraceloc),
    RBraceLoc(rbraceloc), AltForm(nullptr, true) {
sawArrayRangeDesignator(false);
InitExprs.insert(C, InitExprs.end(), initExprs.begin(), initExprs.end());

setDependence(computeDependence(this));
2376}

2378void InitListExpr::reserveInits(const ASTContext &C, unsigned NumInits) {
if (NumInits > InitExprs.size())
  InitExprs.reserve(C, NumInits);
2381}

2383void InitListExpr::resizeInits(const ASTContext &C, unsigned NumInits) {
InitExprs.resize(C, NumInits, nullptr);
2385}

2387Expr *InitListExpr::updateInit(const ASTContext &C, unsigned Init, Expr *expr) {
if (Init >= InitExprs.size()) {
  InitExprs.insert(C, InitExprs.end(), Init - InitExprs.size() + 1, nullptr);
  setInit(Init, expr);
  return nullptr;
}

Expr *Result = cast_or_null<Expr>(InitExprs[Init]);
setInit(Init, expr);
return Result;
2397}

2399void InitListExpr::setArrayFiller(Expr *filler) {
assert(!hasArrayFiller() && "Filler already set!")(static_cast <bool> (!hasArrayFiller() && "Filler already set!"
) ? void (0) : __assert_fail ("!hasArrayFiller() && \"Filler already set!\""
, "clang/lib/AST/Expr.cpp", 2400, __extension__ __PRETTY_FUNCTION__
));
ArrayFillerOrUnionFieldInit = filler;
// Fill out any "holes" in the array due to designated initializers.
Expr **inits = getInits();
for (unsigned i = 0, e = getNumInits(); i != e; ++i)
  if (inits[i] == nullptr)
    inits[i] = filler;
2407}

2409bool InitListExpr::isStringLiteralInit() const {
if (getNumInits() != 1)
  return false;
const ArrayType *AT = getType()->getAsArrayTypeUnsafe();
if (!AT || !AT->getElementType()->isIntegerType())
  return false;
// It is possible for getInit() to return null.
const Expr *Init = getInit(0);
if (!Init)
  return false;
Init = Init->IgnoreParenImpCasts();
return isa<StringLiteral>(Init) || isa<ObjCEncodeExpr>(Init);
2421}

2423bool InitListExpr::isTransparent() const {
assert(isSemanticForm() && "syntactic form never semantically transparent")(static_cast <bool> (isSemanticForm() && "syntactic form never semantically transparent"
) ? void (0) : __assert_fail ("isSemanticForm() && \"syntactic form never semantically transparent\""
, "clang/lib/AST/Expr.cpp", 2424, __extension__ __PRETTY_FUNCTION__
));

// A glvalue InitListExpr is always just sugar.
if (isGLValue()) {
  assert(getNumInits() == 1 && "multiple inits in glvalue init list")(static_cast <bool> (getNumInits() == 1 && "multiple inits in glvalue init list"
) ? void (0) : __assert_fail ("getNumInits() == 1 && \"multiple inits in glvalue init list\""
, "clang/lib/AST/Expr.cpp", 2428, __extension__ __PRETTY_FUNCTION__
));
  return true;
}

// Otherwise, we're sugar if and only if we have exactly one initializer that
// is of the same type.
if (getNumInits() != 1 || !getInit(0))
  return false;

// Don't confuse aggregate initialization of a struct X { X &x; }; with a
// transparent struct copy.
if (!getInit(0)->isPRValue() && getType()->isRecordType())
  return false;

return getType().getCanonicalType() ==
       getInit(0)->getType().getCanonicalType();
2444}

2446bool InitListExpr::isIdiomaticZeroInitializer(const LangOptions &LangOpts) const {
assert(isSyntacticForm() && "only test syntactic form as zero initializer")(static_cast <bool> (isSyntacticForm() && "only test syntactic form as zero initializer"
) ? void (0) : __assert_fail ("isSyntacticForm() && \"only test syntactic form as zero initializer\""
, "clang/lib/AST/Expr.cpp", 2447, __extension__ __PRETTY_FUNCTION__
));

if (LangOpts.CPlusPlus || getNumInits() != 1 || !getInit(0)) {
  return false;
}

const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(getInit(0)->IgnoreImplicit());
return Lit && Lit->getValue() == 0;
2455}

2457SourceLocation InitListExpr::getBeginLoc() const {
if (InitListExpr *SyntacticForm = getSyntacticForm())
  return SyntacticForm->getBeginLoc();
SourceLocation Beg = LBraceLoc;
if (Beg.isInvalid()) {
  // Find the first non-null initializer.
  for (InitExprsTy::const_iterator I = InitExprs.begin(),
                                   E = InitExprs.end();
    I != E; ++I) {
    if (Stmt *S = *I) {
      Beg = S->getBeginLoc();
      break;
    }
  }
}
return Beg;
2473}

2475SourceLocation InitListExpr::getEndLoc() const {
if (InitListExpr *SyntacticForm = getSyntacticForm())
  return SyntacticForm->getEndLoc();
SourceLocation End = RBraceLoc;
if (End.isInvalid()) {
  // Find the first non-null initializer from the end.
  for (Stmt *S : llvm::reverse(InitExprs)) {
    if (S) {
      End = S->getEndLoc();
      break;
    }
  }
}
return End;
2489}

2491/// getFunctionType - Return the underlying function type for this block.
2492///
2493const FunctionProtoType *BlockExpr::getFunctionType() const {
// The block pointer is never sugared, but the function type might be.
return cast<BlockPointerType>(getType())
         ->getPointeeType()->castAs<FunctionProtoType>();
2497}

2499SourceLocation BlockExpr::getCaretLocation() const {
return TheBlock->getCaretLocation();
2501}
2502const Stmt *BlockExpr::getBody() const {
return TheBlock->getBody();
2504}
2505Stmt *BlockExpr::getBody() {
return TheBlock->getBody();
2507}


2510//===----------------------------------------------------------------------===//
2511// Generic Expression Routines
2512//===----------------------------------------------------------------------===//

2514bool Expr::isReadIfDiscardedInCPlusPlus11() const {
// In C++11, discarded-value expressions of a certain form are special,
// according to [expr]p10:
//   The lvalue-to-rvalue conversion (4.1) is applied only if the
//   expression is a glvalue of volatile-qualified type and it has
//   one of the following forms:
if (!isGLValue() || !getType().isVolatileQualified())
  return false;

const Expr *E = IgnoreParens();

//   - id-expression (5.1.1),
if (isa<DeclRefExpr>(E))
  return true;

//   - subscripting (5.2.1),
if (isa<ArraySubscriptExpr>(E))
  return true;

//   - class member access (5.2.5),
if (isa<MemberExpr>(E))
  return true;

//   - indirection (5.3.1),
if (auto *UO = dyn_cast<UnaryOperator>(E))
  if (UO->getOpcode() == UO_Deref)
    return true;

if (auto *BO = dyn_cast<BinaryOperator>(E)) {
  //   - pointer-to-member operation (5.5),
  if (BO->isPtrMemOp())
    return true;

  //   - comma expression (5.18) where the right operand is one of the above.
  if (BO->getOpcode() == BO_Comma)
    return BO->getRHS()->isReadIfDiscardedInCPlusPlus11();
}

//   - conditional expression (5.16) where both the second and the third
//     operands are one of the above, or
if (auto *CO = dyn_cast<ConditionalOperator>(E))
  return CO->getTrueExpr()->isReadIfDiscardedInCPlusPlus11() &&
         CO->getFalseExpr()->isReadIfDiscardedInCPlusPlus11();
// The related edge case of "*x ?: *x".
if (auto *BCO =
        dyn_cast<BinaryConditionalOperator>(E)) {
  if (auto *OVE = dyn_cast<OpaqueValueExpr>(BCO->getTrueExpr()))
    return OVE->getSourceExpr()->isReadIfDiscardedInCPlusPlus11() &&
           BCO->getFalseExpr()->isReadIfDiscardedInCPlusPlus11();
}

// Objective-C++ extensions to the rule.
if (isa<ObjCIvarRefExpr>(E))
  return true;
if (const auto *POE = dyn_cast<PseudoObjectExpr>(E)) {
  if (isa<ObjCPropertyRefExpr, ObjCSubscriptRefExpr>(POE->getSyntacticForm()))
    return true;
}

return false;
2574}

2576/// isUnusedResultAWarning - Return true if this immediate expression should
2577/// be warned about if the result is unused.  If so, fill in Loc and Ranges
2578/// with location to warn on and the source range[s] to report with the
2579/// warning.
2580bool Expr::isUnusedResultAWarning(const Expr *&WarnE, SourceLocation &Loc,
                                SourceRange &R1, SourceRange &R2,
                                ASTContext &Ctx) const {
// Don't warn if the expr is type dependent. The type could end up
// instantiating to void.
if (isTypeDependent())
  return false;

switch (getStmtClass()) {
default:
  if (getType()->isVoidType())
    return false;
  WarnE = this;
  Loc = getExprLoc();
  R1 = getSourceRange();
  return true;
case ParenExprClass:
  return cast<ParenExpr>(this)->getSubExpr()->
    isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
case GenericSelectionExprClass:
  return cast<GenericSelectionExpr>(this)->getResultExpr()->
    isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
case CoawaitExprClass:
case CoyieldExprClass:
  return cast<CoroutineSuspendExpr>(this)->getResumeExpr()->
    isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
case ChooseExprClass:
  return cast<ChooseExpr>(this)->getChosenSubExpr()->
    isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
case UnaryOperatorClass: {
  const UnaryOperator *UO = cast<UnaryOperator>(this);

  switch (UO->getOpcode()) {
  case UO_Plus:
  case UO_Minus:
  case UO_AddrOf:
  case UO_Not:
  case UO_LNot:
  case UO_Deref:
    break;
  case UO_Coawait:
    // This is just the 'operator co_await' call inside the guts of a
    // dependent co_await call.
  case UO_PostInc:
  case UO_PostDec:
  case UO_PreInc:
  case UO_PreDec:                 // ++/--
    return false;  // Not a warning.
  case UO_Real:
  case UO_Imag:
    // accessing a piece of a volatile complex is a side-effect.
    if (Ctx.getCanonicalType(UO->getSubExpr()->getType())
        .isVolatileQualified())
      return false;
    break;
  case UO_Extension:
    return UO->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
  }
  WarnE = this;
  Loc = UO->getOperatorLoc();
  R1 = UO->getSubExpr()->getSourceRange();
  return true;
}
case BinaryOperatorClass: {
  const BinaryOperator *BO = cast<BinaryOperator>(this);
  switch (BO->getOpcode()) {
    default:
      break;
    // Consider the RHS of comma for side effects. LHS was checked by
    // Sema::CheckCommaOperands.
    case BO_Comma:
      // ((foo = <blah>), 0) is an idiom for hiding the result (and
      // lvalue-ness) of an assignment written in a macro.
      if (IntegerLiteral *IE =
            dyn_cast<IntegerLiteral>(BO->getRHS()->IgnoreParens()))
        if (IE->getValue() == 0)
          return false;
      return BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
    // Consider '||', '&&' to have side effects if the LHS or RHS does.
    case BO_LAnd:
    case BO_LOr:
      if (!BO->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx) ||
          !BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
        return false;
      break;
  }
  if (BO->isAssignmentOp())
    return false;
  WarnE = this;
  Loc = BO->getOperatorLoc();
  R1 = BO->getLHS()->getSourceRange();
  R2 = BO->getRHS()->getSourceRange();
  return true;
}
case CompoundAssignOperatorClass:
case VAArgExprClass:
case AtomicExprClass:
  return false;

case ConditionalOperatorClass: {
  // If only one of the LHS or RHS is a warning, the operator might
  // be being used for control flow. Only warn if both the LHS and
  // RHS are warnings.
  const auto *Exp = cast<ConditionalOperator>(this);
  return Exp->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx) &&
         Exp->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
}
case BinaryConditionalOperatorClass: {
  const auto *Exp = cast<BinaryConditionalOperator>(this);
  return Exp->getFalseExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
}

case MemberExprClass:
  WarnE = this;
  Loc = cast<MemberExpr>(this)->getMemberLoc();
  R1 = SourceRange(Loc, Loc);
  R2 = cast<MemberExpr>(this)->getBase()->getSourceRange();
  return true;

case ArraySubscriptExprClass:
  WarnE = this;
  Loc = cast<ArraySubscriptExpr>(this)->getRBracketLoc();
  R1 = cast<ArraySubscriptExpr>(this)->getLHS()->getSourceRange();
  R2 = cast<ArraySubscriptExpr>(this)->getRHS()->getSourceRange();
  return true;

case CXXOperatorCallExprClass: {
  // Warn about operator ==,!=,<,>,<=, and >= even when user-defined operator
  // overloads as there is no reasonable way to define these such that they
  // have non-trivial, desirable side-effects. See the -Wunused-comparison
  // warning: operators == and != are commonly typo'ed, and so warning on them
  // provides additional value as well. If this list is updated,
  // DiagnoseUnusedComparison should be as well.
  const CXXOperatorCallExpr *Op = cast<CXXOperatorCallExpr>(this);
  switch (Op->getOperator()) {
  default:
    break;
  case OO_EqualEqual:
  case OO_ExclaimEqual:
  case OO_Less:
  case OO_Greater:
  case OO_GreaterEqual:
  case OO_LessEqual:
    if (Op->getCallReturnType(Ctx)->isReferenceType() ||
        Op->getCallReturnType(Ctx)->isVoidType())
      break;
    WarnE = this;
    Loc = Op->getOperatorLoc();
    R1 = Op->getSourceRange();
    return true;
  }

  // Fallthrough for generic call handling.
  [[fallthrough]];
}
case CallExprClass:
case CXXMemberCallExprClass:
case UserDefinedLiteralClass: {
  // If this is a direct call, get the callee.
  const CallExpr *CE = cast<CallExpr>(this);
  if (const Decl *FD = CE->getCalleeDecl()) {
    // If the callee has attribute pure, const, or warn_unused_result, warn
    // about it. void foo() { strlen("bar"); } should warn.
    //
    // Note: If new cases are added here, DiagnoseUnusedExprResult should be
    // updated to match for QoI.
    if (CE->hasUnusedResultAttr(Ctx) ||
        FD->hasAttr<PureAttr>() || FD->hasAttr<ConstAttr>()) {
      WarnE = this;
      Loc = CE->getCallee()->getBeginLoc();
      R1 = CE->getCallee()->getSourceRange();

      if (unsigned NumArgs = CE->getNumArgs())
        R2 = SourceRange(CE->getArg(0)->getBeginLoc(),
                         CE->getArg(NumArgs - 1)->getEndLoc());
      return true;
    }
  }
  return false;
}

// If we don't know precisely what we're looking at, let's not warn.
case UnresolvedLookupExprClass:
case CXXUnresolvedConstructExprClass:
case RecoveryExprClass:
  return false;

case CXXTemporaryObjectExprClass:
case CXXConstructExprClass: {
  if (const CXXRecordDecl *Type = getType()->getAsCXXRecordDecl()) {
    const auto *WarnURAttr = Type->getAttr<WarnUnusedResultAttr>();
    if (Type->hasAttr<WarnUnusedAttr>() ||
        (WarnURAttr && WarnURAttr->IsCXX11NoDiscard())) {
      WarnE = this;
      Loc = getBeginLoc();
      R1 = getSourceRange();
      return true;
    }
  }

  const auto *CE = cast<CXXConstructExpr>(this);
  if (const CXXConstructorDecl *Ctor = CE->getConstructor()) {
    const auto *WarnURAttr = Ctor->getAttr<WarnUnusedResultAttr>();
    if (WarnURAttr && WarnURAttr->IsCXX11NoDiscard()) {
      WarnE = this;
      Loc = getBeginLoc();
      R1 = getSourceRange();

      if (unsigned NumArgs = CE->getNumArgs())
        R2 = SourceRange(CE->getArg(0)->getBeginLoc(),
                         CE->getArg(NumArgs - 1)->getEndLoc());
      return true;
    }
  }

  return false;
}

case ObjCMessageExprClass: {
  const ObjCMessageExpr *ME = cast<ObjCMessageExpr>(this);
  if (Ctx.getLangOpts().ObjCAutoRefCount &&
      ME->isInstanceMessage() &&
      !ME->getType()->isVoidType() &&
      ME->getMethodFamily() == OMF_init) {
    WarnE = this;
    Loc = getExprLoc();
    R1 = ME->getSourceRange();
    return true;
  }

  if (const ObjCMethodDecl *MD = ME->getMethodDecl())
    if (MD->hasAttr<WarnUnusedResultAttr>()) {
      WarnE = this;
      Loc = getExprLoc();
      return true;
    }

  return false;
}

case ObjCPropertyRefExprClass:
case ObjCSubscriptRefExprClass:
  WarnE = this;
  Loc = getExprLoc();
  R1 = getSourceRange();
  return true;

case PseudoObjectExprClass: {
  const auto *POE = cast<PseudoObjectExpr>(this);

  // For some syntactic forms, we should always warn.
  if (isa<ObjCPropertyRefExpr, ObjCSubscriptRefExpr>(
          POE->getSyntacticForm())) {
    WarnE = this;
    Loc = getExprLoc();
    R1 = getSourceRange();
    return true;
  }

  // For others, we should never warn.
  if (auto *BO = dyn_cast<BinaryOperator>(POE->getSyntacticForm()))
    if (BO->isAssignmentOp())
      return false;
  if (auto *UO = dyn_cast<UnaryOperator>(POE->getSyntacticForm()))
    if (UO->isIncrementDecrementOp())
      return false;

  // Otherwise, warn if the result expression would warn.
  const Expr *Result = POE->getResultExpr();
  return Result && Result->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
}

case StmtExprClass: {
  // Statement exprs don't logically have side effects themselves, but are
  // sometimes used in macros in ways that give them a type that is unused.
  // For example ({ blah; foo(); }) will end up with a type if foo has a type.
  // however, if the result of the stmt expr is dead, we don't want to emit a
  // warning.
  const CompoundStmt *CS = cast<StmtExpr>(this)->getSubStmt();
  if (!CS->body_empty()) {
    if (const Expr *E = dyn_cast<Expr>(CS->body_back()))
      return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
    if (const LabelStmt *Label = dyn_cast<LabelStmt>(CS->body_back()))
      if (const Expr *E = dyn_cast<Expr>(Label->getSubStmt()))
        return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
  }

  if (getType()->isVoidType())
    return false;
  WarnE = this;
  Loc = cast<StmtExpr>(this)->getLParenLoc();
  R1 = getSourceRange();
  return true;
}
case CXXFunctionalCastExprClass:
case CStyleCastExprClass: {
  // Ignore an explicit cast to void, except in C++98 if the operand is a
  // volatile glvalue for which we would trigger an implicit read in any
  // other language mode. (Such an implicit read always happens as part of
  // the lvalue conversion in C, and happens in C++ for expressions of all
  // forms where it seems likely the user intended to trigger a volatile
  // load.)
  const CastExpr *CE = cast<CastExpr>(this);
  const Expr *SubE = CE->getSubExpr()->IgnoreParens();
  if (CE->getCastKind() == CK_ToVoid) {
    if (Ctx.getLangOpts().CPlusPlus && !Ctx.getLangOpts().CPlusPlus11 &&
        SubE->isReadIfDiscardedInCPlusPlus11()) {
      // Suppress the "unused value" warning for idiomatic usage of
      // '(void)var;' used to suppress "unused variable" warnings.
      if (auto *DRE = dyn_cast<DeclRefExpr>(SubE))
        if (auto *VD = dyn_cast<VarDecl>(DRE->getDecl()))
          if (!VD->isExternallyVisible())
            return false;

      // The lvalue-to-rvalue conversion would have no effect for an array.
      // It's implausible that the programmer expected this to result in a
      // volatile array load, so don't warn.
      if (SubE->getType()->isArrayType())
        return false;

      return SubE->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
    }
    return false;
  }

  // If this is a cast to a constructor conversion, check the operand.
  // Otherwise, the result of the cast is unused.
  if (CE->getCastKind() == CK_ConstructorConversion)
    return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
  if (CE->getCastKind() == CK_Dependent)
    return false;

  WarnE = this;
  if (const CXXFunctionalCastExpr *CXXCE =
          dyn_cast<CXXFunctionalCastExpr>(this)) {
    Loc = CXXCE->getBeginLoc();
    R1 = CXXCE->getSubExpr()->getSourceRange();
  } else {
    const CStyleCastExpr *CStyleCE = cast<CStyleCastExpr>(this);
    Loc = CStyleCE->getLParenLoc();
    R1 = CStyleCE->getSubExpr()->getSourceRange();
  }
  return true;
}
case ImplicitCastExprClass: {
  const CastExpr *ICE = cast<ImplicitCastExpr>(this);

  // lvalue-to-rvalue conversion on a volatile lvalue is a side-effect.
  if (ICE->getCastKind() == CK_LValueToRValue &&
      ICE->getSubExpr()->getType().isVolatileQualified())
    return false;

  return ICE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
}
case CXXDefaultArgExprClass:
  return (cast<CXXDefaultArgExpr>(this)
          ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
case CXXDefaultInitExprClass:
  return (cast<CXXDefaultInitExpr>(this)
          ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));

case CXXNewExprClass:
  // FIXME: In theory, there might be new expressions that don't have side
  // effects (e.g. a placement new with an uninitialized POD).
case CXXDeleteExprClass:
  return false;
case MaterializeTemporaryExprClass:
  return cast<MaterializeTemporaryExpr>(this)
      ->getSubExpr()
      ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
case CXXBindTemporaryExprClass:
  return cast<CXXBindTemporaryExpr>(this)->getSubExpr()
             ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
case ExprWithCleanupsClass:
  return cast<ExprWithCleanups>(this)->getSubExpr()
             ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
}
2957}

2959/// isOBJCGCCandidate - Check if an expression is objc gc'able.
2960/// returns true, if it is; false otherwise.
2961bool Expr::isOBJCGCCandidate(ASTContext &Ctx) const {
const Expr *E = IgnoreParens();
switch (E->getStmtClass()) {
default:
  return false;
case ObjCIvarRefExprClass:
  return true;
case Expr::UnaryOperatorClass:
  return cast<UnaryOperator>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
case ImplicitCastExprClass:
  return cast<ImplicitCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
case MaterializeTemporaryExprClass:
  return cast<MaterializeTemporaryExpr>(E)->getSubExpr()->isOBJCGCCandidate(
      Ctx);
case CStyleCastExprClass:
  return cast<CStyleCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
case DeclRefExprClass: {
  const Decl *D = cast<DeclRefExpr>(E)->getDecl();

  if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
    if (VD->hasGlobalStorage())
      return true;
    QualType T = VD->getType();
    // dereferencing to a  pointer is always a gc'able candidate,
    // unless it is __weak.
    return T->isPointerType() &&
           (Ctx.getObjCGCAttrKind(T) != Qualifiers::Weak);
  }
  return false;
}
case MemberExprClass: {
  const MemberExpr *M = cast<MemberExpr>(E);
  return M->getBase()->isOBJCGCCandidate(Ctx);
}
case ArraySubscriptExprClass:
  return cast<ArraySubscriptExpr>(E)->getBase()->isOBJCGCCandidate(Ctx);
}
2998}

3000bool Expr::isBoundMemberFunction(ASTContext &Ctx) const {
if (isTypeDependent())
  return false;
return ClassifyLValue(Ctx) == Expr::LV_MemberFunction;
3004}

3006QualType Expr::findBoundMemberType(const Expr *expr) {
assert(expr->hasPlaceholderType(BuiltinType::BoundMember))(static_cast <bool> (expr->hasPlaceholderType(BuiltinType
::BoundMember)) ? void (0) : __assert_fail ("expr->hasPlaceholderType(BuiltinType::BoundMember)"
, "clang/lib/AST/Expr.cpp", 3007, __extension__ __PRETTY_FUNCTION__
));

// Bound member expressions are always one of these possibilities:
//   x->m      x.m      x->*y      x.*y
// (possibly parenthesized)

expr = expr->IgnoreParens();
if (const MemberExpr *mem = dyn_cast<MemberExpr>(expr)) {
  assert(isa<CXXMethodDecl>(mem->getMemberDecl()))(static_cast <bool> (isa<CXXMethodDecl>(mem->getMemberDecl
())) ? void (0) : __assert_fail ("isa<CXXMethodDecl>(mem->getMemberDecl())"
, "clang/lib/AST/Expr.cpp", 3015, __extension__ __PRETTY_FUNCTION__
));
  return mem->getMemberDecl()->getType();
}

if (const BinaryOperator *op = dyn_cast<BinaryOperator>(expr)) {
  QualType type = op->getRHS()->getType()->castAs<MemberPointerType>()
                    ->getPointeeType();
  assert(type->isFunctionType())(static_cast <bool> (type->isFunctionType()) ? void (
0) : __assert_fail ("type->isFunctionType()", "clang/lib/AST/Expr.cpp"
, 3022, __extension__ __PRETTY_FUNCTION__));
  return type;
}

assert(isa<UnresolvedMemberExpr>(expr) || isa<CXXPseudoDestructorExpr>(expr))(static_cast <bool> (isa<UnresolvedMemberExpr>(expr
) || isa<CXXPseudoDestructorExpr>(expr)) ? void (0) : __assert_fail
 ("isa<UnresolvedMemberExpr>(expr) || isa<CXXPseudoDestructorExpr>(expr)"
, "clang/lib/AST/Expr.cpp", 3026, __extension__ __PRETTY_FUNCTION__
));
return QualType();
3028}

3030Expr *Expr::IgnoreImpCasts() {
return IgnoreExprNodes(this, IgnoreImplicitCastsSingleStep);
3032}

3034Expr *Expr::IgnoreCasts() {
return IgnoreExprNodes(this, IgnoreCastsSingleStep);
3036}

3038Expr *Expr::IgnoreImplicit() {
return IgnoreExprNodes(this, IgnoreImplicitSingleStep);
3040}

3042Expr *Expr::IgnoreImplicitAsWritten() {
return IgnoreExprNodes(this, IgnoreImplicitAsWrittenSingleStep);
3044}

3046Expr *Expr::IgnoreParens() {
return IgnoreExprNodes(this, IgnoreParensSingleStep);
3048}

3050Expr *Expr::IgnoreParenImpCasts() {
return IgnoreExprNodes(this, IgnoreParensSingleStep,
                       IgnoreImplicitCastsExtraSingleStep);
3053}

3055Expr *Expr::IgnoreParenCasts() {
return IgnoreExprNodes(this, IgnoreParensSingleStep, IgnoreCastsSingleStep);
3057}

3059Expr *Expr::IgnoreConversionOperatorSingleStep() {
if (auto *MCE = dyn_cast<CXXMemberCallExpr>(this)) {
  if (MCE->getMethodDecl() && isa<CXXConversionDecl>(MCE->getMethodDecl()))
    return MCE->getImplicitObjectArgument();
}
return this;
3065}

3067Expr *Expr::IgnoreParenLValueCasts() {
return IgnoreExprNodes(this, IgnoreParensSingleStep,
                       IgnoreLValueCastsSingleStep);
3070}

3072Expr *Expr::IgnoreParenBaseCasts() {
return IgnoreExprNodes(this, IgnoreParensSingleStep,
                       IgnoreBaseCastsSingleStep);
3075}

3077Expr *Expr::IgnoreParenNoopCasts(const ASTContext &Ctx) {
auto IgnoreNoopCastsSingleStep = [&Ctx](Expr *E) {
  if (auto *CE = dyn_cast<CastExpr>(E)) {
    // We ignore integer <-> casts that are of the same width, ptr<->ptr and
    // ptr<->int casts of the same width. We also ignore all identity casts.
    Expr *SubExpr = CE->getSubExpr();
    bool IsIdentityCast =
        Ctx.hasSameUnqualifiedType(E->getType(), SubExpr->getType());
    bool IsSameWidthCast = (E->getType()->isPointerType() ||
                            E->getType()->isIntegralType(Ctx)) &&
                           (SubExpr->getType()->isPointerType() ||
                            SubExpr->getType()->isIntegralType(Ctx)) &&
                           (Ctx.getTypeSize(E->getType()) ==
                            Ctx.getTypeSize(SubExpr->getType()));

    if (IsIdentityCast || IsSameWidthCast)
      return SubExpr;
  } else if (auto *NTTP = dyn_cast<SubstNonTypeTemplateParmExpr>(E))
    return NTTP->getReplacement();

  return E;
};
return IgnoreExprNodes(this, IgnoreParensSingleStep,
                       IgnoreNoopCastsSingleStep);
3101}

3103Expr *Expr::IgnoreUnlessSpelledInSource() {
auto IgnoreImplicitConstructorSingleStep = [](Expr *E) {
  if (auto *Cast = dyn_cast<CXXFunctionalCastExpr>(E)) {
    auto *SE = Cast->getSubExpr();
    if (SE->getSourceRange() == E->getSourceRange())
      return SE;
  }

  if (auto *C = dyn_cast<CXXConstructExpr>(E)) {
    auto NumArgs = C->getNumArgs();
    if (NumArgs == 1 ||
        (NumArgs > 1 && isa<CXXDefaultArgExpr>(C->getArg(1)))) {
      Expr *A = C->getArg(0);
      if (A->getSourceRange() == E->getSourceRange() || C->isElidable())
        return A;
    }
  }
  return E;
};
auto IgnoreImplicitMemberCallSingleStep = [](Expr *E) {
  if (auto *C = dyn_cast<CXXMemberCallExpr>(E)) {
    Expr *ExprNode = C->getImplicitObjectArgument();
    if (ExprNode->getSourceRange() == E->getSourceRange()) {
      return ExprNode;
    }
    if (auto *PE = dyn_cast<ParenExpr>(ExprNode)) {
      if (PE->getSourceRange() == C->getSourceRange()) {
        return cast<Expr>(PE);
      }
    }
    ExprNode = ExprNode->IgnoreParenImpCasts();
    if (ExprNode->getSourceRange() == E->getSourceRange())
      return ExprNode;
  }
  return E;
};
return IgnoreExprNodes(
    this, IgnoreImplicitSingleStep, IgnoreImplicitCastsExtraSingleStep,
    IgnoreParensOnlySingleStep, IgnoreImplicitConstructorSingleStep,
    IgnoreImplicitMemberCallSingleStep);
3143}

3145bool Expr::isDefaultArgument() const {
const Expr *E = this;
if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
  E = M->getSubExpr();

while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E))
  E = ICE->getSubExprAsWritten();

return isa<CXXDefaultArgExpr>(E);
3154}

3156/// Skip over any no-op casts and any temporary-binding
3157/// expressions.
3158static const Expr *skipTemporaryBindingsNoOpCastsAndParens(const Expr *E) {
if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
  E = M->getSubExpr();

while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
  if (ICE->getCastKind() == CK_NoOp)
    E = ICE->getSubExpr();
  else
    break;
}

while (const CXXBindTemporaryExpr *BE = dyn_cast<CXXBindTemporaryExpr>(E))
  E = BE->getSubExpr();

while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
  if (ICE->getCastKind() == CK_NoOp)
    E = ICE->getSubExpr();
  else
    break;
}

return E->IgnoreParens();
3180}

3182/// isTemporaryObject - Determines if this expression produces a
3183/// temporary of the given class type.
3184bool Expr::isTemporaryObject(ASTContext &C, const CXXRecordDecl *TempTy) const {
if (!C.hasSameUnqualifiedType(getType(), C.getTypeDeclType(TempTy)))
  return false;

const Expr *E = skipTemporaryBindingsNoOpCastsAndParens(this);

// Temporaries are by definition pr-values of class type.
if (!E->Classify(C).isPRValue()) {
  // In this context, property reference is a message call and is pr-value.
  if (!isa<ObjCPropertyRefExpr>(E))
    return false;
}

// Black-list a few cases which yield pr-values of class type that don't
// refer to temporaries of that type:

// - implicit derived-to-base conversions
if (isa<ImplicitCastExpr>(E)) {
  switch (cast<ImplicitCastExpr>(E)->getCastKind()) {
  case CK_DerivedToBase:
  case CK_UncheckedDerivedToBase:
    return false;
  default:
    break;
  }
}

// - member expressions (all)
if (isa<MemberExpr>(E))
  return false;

if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E))
  if (BO->isPtrMemOp())
    return false;

// - opaque values (all)
if (isa<OpaqueValueExpr>(E))
  return false;

return true;
3224}

3226bool Expr::isImplicitCXXThis() const {
const Expr *E = this;

// Strip away parentheses and casts we don't care about.
while (true) {
  if (const ParenExpr *Paren = dyn_cast<ParenExpr>(E)) {
    E = Paren->getSubExpr();
    continue;
  }

  if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
    if (ICE->getCastKind() == CK_NoOp ||
        ICE->getCastKind() == CK_LValueToRValue ||
        ICE->getCastKind() == CK_DerivedToBase ||
        ICE->getCastKind() == CK_UncheckedDerivedToBase) {
      E = ICE->getSubExpr();
      continue;
    }
  }

  if (const UnaryOperator* UnOp = dyn_cast<UnaryOperator>(E)) {
    if (UnOp->getOpcode() == UO_Extension) {
      E = UnOp->getSubExpr();
      continue;
    }
  }

  if (const MaterializeTemporaryExpr *M
                                    = dyn_cast<MaterializeTemporaryExpr>(E)) {
    E = M->getSubExpr();
    continue;
  }

  break;
}

if (const CXXThisExpr *This = dyn_cast<CXXThisExpr>(E))
  return This->isImplicit();

return false;
3266}

3268/// hasAnyTypeDependentArguments - Determines if any of the expressions
3269/// in Exprs is type-dependent.
3270bool Expr::hasAnyTypeDependentArguments(ArrayRef<Expr *> Exprs) {
for (unsigned I = 0; I < Exprs.size(); ++I)
  if (Exprs[I]->isTypeDependent())
    return true;

return false;
3276}

3278bool Expr::isConstantInitializer(ASTContext &Ctx, bool IsForRef,
                               const Expr **Culprit) const {
assert(!isValueDependent() &&(static_cast <bool> (!isValueDependent() && "Expression evaluator can't be called on a dependent expression."
) ? void (0) : __assert_fail ("!isValueDependent() && \"Expression evaluator can't be called on a dependent expression.\""
, "clang/lib/AST/Expr.cpp", 3281, __extension__ __PRETTY_FUNCTION__
))
       "Expression evaluator can't be called on a dependent expression.")(static_cast <bool> (!isValueDependent() && "Expression evaluator can't be called on a dependent expression."
) ? void (0) : __assert_fail ("!isValueDependent() && \"Expression evaluator can't be called on a dependent expression.\""
, "clang/lib/AST/Expr.cpp", 3281, __extension__ __PRETTY_FUNCTION__
));

// This function is attempting whether an expression is an initializer
// which can be evaluated at compile-time. It very closely parallels
// ConstExprEmitter in CGExprConstant.cpp; if they don't match, it
// will lead to unexpected results.  Like ConstExprEmitter, it falls back
// to isEvaluatable most of the time.
//
// If we ever capture reference-binding directly in the AST, we can
// kill the second parameter.

if (IsForRef) {
  EvalResult Result;
  if (EvaluateAsLValue(Result, Ctx) && !Result.HasSideEffects)
    return true;
  if (Culprit)
    *Culprit = this;
  return false;
}

switch (getStmtClass()) {
default: break;
case Stmt::ExprWithCleanupsClass:
  return cast<ExprWithCleanups>(this)->getSubExpr()->isConstantInitializer(
      Ctx, IsForRef, Culprit);
case StringLiteralClass:
case ObjCEncodeExprClass:
  return true;
case CXXTemporaryObjectExprClass:
case CXXConstructExprClass: {
  const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);

  if (CE->getConstructor()->isTrivial() &&
      CE->getConstructor()->getParent()->hasTrivialDestructor()) {
    // Trivial default constructor
    if (!CE->getNumArgs()) return true;

    // Trivial copy constructor
    assert(CE->getNumArgs() == 1 && "trivial ctor with > 1 argument")(static_cast <bool> (CE->getNumArgs() == 1 &&
 "trivial ctor with > 1 argument") ? void (0) : __assert_fail
 ("CE->getNumArgs() == 1 && \"trivial ctor with > 1 argument\""
, "clang/lib/AST/Expr.cpp", 3319, __extension__ __PRETTY_FUNCTION__
));
    return CE->getArg(0)->isConstantInitializer(Ctx, false, Culprit);
  }

  break;
}
case ConstantExprClass: {
  // FIXME: We should be able to return "true" here, but it can lead to extra
  // error messages. E.g. in Sema/array-init.c.
  const Expr *Exp = cast<ConstantExpr>(this)->getSubExpr();
  return Exp->isConstantInitializer(Ctx, false, Culprit);
}
case CompoundLiteralExprClass: {
  // This handles gcc's extension that allows global initializers like
  // "struct x {int x;} x = (struct x) {};".
  // FIXME: This accepts other cases it shouldn't!
  const Expr *Exp = cast<CompoundLiteralExpr>(this)->getInitializer();
  return Exp->isConstantInitializer(Ctx, false, Culprit);
}
case DesignatedInitUpdateExprClass: {
  const DesignatedInitUpdateExpr *DIUE = cast<DesignatedInitUpdateExpr>(this);
  return DIUE->getBase()->isConstantInitializer(Ctx, false, Culprit) &&
         DIUE->getUpdater()->isConstantInitializer(Ctx, false, Culprit);
}
case InitListExprClass: {
  const InitListExpr *ILE = cast<InitListExpr>(this);
  assert(ILE->isSemanticForm() && "InitListExpr must be in semantic form")(static_cast <bool> (ILE->isSemanticForm() &&
 "InitListExpr must be in semantic form") ? void (0) : __assert_fail
 ("ILE->isSemanticForm() && \"InitListExpr must be in semantic form\""
, "clang/lib/AST/Expr.cpp", 3345, __extension__ __PRETTY_FUNCTION__
));
  if (ILE->getType()->isArrayType()) {
    unsigned numInits = ILE->getNumInits();
    for (unsigned i = 0; i < numInits; i++) {
      if (!ILE->getInit(i)->isConstantInitializer(Ctx, false, Culprit))
        return false;
    }
    return true;
  }

  if (ILE->getType()->isRecordType()) {
    unsigned ElementNo = 0;
    RecordDecl *RD = ILE->getType()->castAs<RecordType>()->getDecl();
    for (const auto *Field : RD->fields()) {
      // If this is a union, skip all the fields that aren't being initialized.
      if (RD->isUnion() && ILE->getInitializedFieldInUnion() != Field)
        continue;

      // Don't emit anonymous bitfields, they just affect layout.
      if (Field->isUnnamedBitfield())
        continue;

      if (ElementNo < ILE->getNumInits()) {
        const Expr *Elt = ILE->getInit(ElementNo++);
        if (Field->isBitField()) {
          // Bitfields have to evaluate to an integer.
          EvalResult Result;
          if (!Elt->EvaluateAsInt(Result, Ctx)) {
            if (Culprit)
              *Culprit = Elt;
            return false;
          }
        } else {
          bool RefType = Field->getType()->isReferenceType();
          if (!Elt->isConstantInitializer(Ctx, RefType, Culprit))
            return false;
        }
      }
    }
    return true;
  }

  break;
}
case ImplicitValueInitExprClass:
case NoInitExprClass:
  return true;
case ParenExprClass:
  return cast<ParenExpr>(this)->getSubExpr()
    ->isConstantInitializer(Ctx, IsForRef, Culprit);
case GenericSelectionExprClass:
  return cast<GenericSelectionExpr>(this)->getResultExpr()
    ->isConstantInitializer(Ctx, IsForRef, Culprit);
case ChooseExprClass:
  if (cast<ChooseExpr>(this)->isConditionDependent()) {
    if (Culprit)
      *Culprit = this;
    return false;
  }
  return cast<ChooseExpr>(this)->getChosenSubExpr()
    ->isConstantInitializer(Ctx, IsForRef, Culprit);
case UnaryOperatorClass: {
  const UnaryOperator* Exp = cast<UnaryOperator>(this);
  if (Exp->getOpcode() == UO_Extension)
    return Exp->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
  break;
}
case CXXFunctionalCastExprClass:
case CXXStaticCastExprClass:
case ImplicitCastExprClass:
case CStyleCastExprClass:
case ObjCBridgedCastExprClass:
case CXXDynamicCastExprClass:
case CXXReinterpretCastExprClass:
case CXXAddrspaceCastExprClass:
case CXXConstCastExprClass: {
  const CastExpr *CE = cast<CastExpr>(this);

  // Handle misc casts we want to ignore.
  if (CE->getCastKind() == CK_NoOp ||
      CE->getCastKind() == CK_LValueToRValue ||
      CE->getCastKind() == CK_ToUnion ||
      CE->getCastKind() == CK_ConstructorConversion ||
      CE->getCastKind() == CK_NonAtomicToAtomic ||
      CE->getCastKind() == CK_AtomicToNonAtomic ||
      CE->getCastKind() == CK_IntToOCLSampler)
    return CE->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);

  break;
}
case MaterializeTemporaryExprClass:
  return cast<MaterializeTemporaryExpr>(this)
      ->getSubExpr()
      ->isConstantInitializer(Ctx, false, Culprit);

case SubstNonTypeTemplateParmExprClass:
  return cast<SubstNonTypeTemplateParmExpr>(this)->getReplacement()
    ->isConstantInitializer(Ctx, false, Culprit);
case CXXDefaultArgExprClass:
  return cast<CXXDefaultArgExpr>(this)->getExpr()
    ->isConstantInitializer(Ctx, false, Culprit);
case CXXDefaultInitExprClass:
  return cast<CXXDefaultInitExpr>(this)->getExpr()
    ->isConstantInitializer(Ctx, false, Culprit);
}
// Allow certain forms of UB in constant initializers: signed integer
// overflow and floating-point division by zero. We'll give a warning on
// these, but they're common enough that we have to accept them.
if (isEvaluatable(Ctx, SE_AllowUndefinedBehavior))
  return true;
if (Culprit)
  *Culprit = this;
return false;
3458}

3460bool CallExpr::isBuiltinAssumeFalse(const ASTContext &Ctx) const {
unsigned BuiltinID = getBuiltinCallee();
if (BuiltinID != Builtin::BI__assume &&
    BuiltinID != Builtin::BI__builtin_assume)
  return false;

const Expr* Arg = getArg(0);
bool ArgVal;
return !Arg->isValueDependent() &&
       Arg->EvaluateAsBooleanCondition(ArgVal, Ctx) && !ArgVal;
3470}

3472bool CallExpr::isCallToStdMove() const {
return getBuiltinCallee() == Builtin::BImove;
3474}

3476namespace {
/// Look for any side effects within a Stmt.
class SideEffectFinder : public ConstEvaluatedExprVisitor<SideEffectFinder> {
  typedef ConstEvaluatedExprVisitor<SideEffectFinder> Inherited;
  const bool IncludePossibleEffects;
  bool HasSideEffects;

public:
  explicit SideEffectFinder(const ASTContext &Context, bool IncludePossible)
    : Inherited(Context),
      IncludePossibleEffects(IncludePossible), HasSideEffects(false) { }

  bool hasSideEffects() const { return HasSideEffects; }

  void VisitDecl(const Decl *D) {
    if (!D)
      return;

    // We assume the caller checks subexpressions (eg, the initializer, VLA
    // bounds) for side-effects on our behalf.
    if (auto *VD = dyn_cast<VarDecl>(D)) {
      // Registering a destructor is a side-effect.
      if (IncludePossibleEffects && VD->isThisDeclarationADefinition() &&
          VD->needsDestruction(Context))
        HasSideEffects = true;
    }
  }

  void VisitDeclStmt(const DeclStmt *DS) {
    for (auto *D : DS->decls())
      VisitDecl(D);
    Inherited::VisitDeclStmt(DS);
  }

  void VisitExpr(const Expr *E) {
    if (!HasSideEffects &&
        E->HasSideEffects(Context, IncludePossibleEffects))
      HasSideEffects = true;
  }
};
3516}

3518bool Expr::HasSideEffects(const ASTContext &Ctx,
                        bool IncludePossibleEffects) const {
// In circumstances where we care about definite side effects instead of
// potential side effects, we want to ignore expressions that are part of a
// macro expansion as a potential side effect.
if (!IncludePossibleEffects && getExprLoc().isMacroID())
  return false;

switch (getStmtClass()) {
case NoStmtClass:
#define ABSTRACT_STMT(Type)
#define STMT(Type, Base) case Type##Class:
#define EXPR(Type, Base)
#include "clang/AST/StmtNodes.inc"
  llvm_unreachable("unexpected Expr kind")::llvm::llvm_unreachable_internal("unexpected Expr kind", "clang/lib/AST/Expr.cpp"
, 3532);

case DependentScopeDeclRefExprClass:
case CXXUnresolvedConstructExprClass:
case CXXDependentScopeMemberExprClass:
case UnresolvedLookupExprClass:
case UnresolvedMemberExprClass:
case PackExpansionExprClass:
case SubstNonTypeTemplateParmPackExprClass:
case FunctionParmPackExprClass:
case TypoExprClass:
case RecoveryExprClass:
case CXXFoldExprClass:
  // Make a conservative assumption for dependent nodes.
  return IncludePossibleEffects;

case DeclRefExprClass:
case ObjCIvarRefExprClass:
case PredefinedExprClass:
case IntegerLiteralClass:
case FixedPointLiteralClass:
case FloatingLiteralClass:
case ImaginaryLiteralClass:
case StringLiteralClass:
case CharacterLiteralClass:
case OffsetOfExprClass:
case ImplicitValueInitExprClass:
case UnaryExprOrTypeTraitExprClass:
case AddrLabelExprClass:
case GNUNullExprClass:
case ArrayInitIndexExprClass:
case NoInitExprClass:
case CXXBoolLiteralExprClass:
case CXXNullPtrLiteralExprClass:
case CXXThisExprClass:
case CXXScalarValueInitExprClass:
case TypeTraitExprClass:
case ArrayTypeTraitExprClass:
case ExpressionTraitExprClass:
case CXXNoexceptExprClass:
case SizeOfPackExprClass:
case ObjCStringLiteralClass:
case ObjCEncodeExprClass:
case ObjCBoolLiteralExprClass:
case ObjCAvailabilityCheckExprClass:
case CXXUuidofExprClass:
case OpaqueValueExprClass:
case SourceLocExprClass:
case ConceptSpecializationExprClass:
case RequiresExprClass:
case SYCLUniqueStableNameExprClass:
  // These never have a side-effect.
  return false;

case ConstantExprClass:
  // FIXME: Move this into the "return false;" block above.
  return cast<ConstantExpr>(this)->getSubExpr()->HasSideEffects(
      Ctx, IncludePossibleEffects);

case CallExprClass:
case CXXOperatorCallExprClass:
case CXXMemberCallExprClass:
case CUDAKernelCallExprClass:
case UserDefinedLiteralClass: {
  // We don't know a call definitely has side effects, except for calls
  // to pure/const functions that definitely don't.
  // If the call itself is considered side-effect free, check the operands.
  const Decl *FD = cast<CallExpr>(this)->getCalleeDecl();
  bool IsPure = FD && (FD->hasAttr<ConstAttr>() || FD->hasAttr<PureAttr>());
  if (IsPure || !IncludePossibleEffects)
    break;
  return true;
}

case BlockExprClass:
case CXXBindTemporaryExprClass:
  if (!IncludePossibleEffects)
    break;
  return true;

case MSPropertyRefExprClass:
case MSPropertySubscriptExprClass:
case CompoundAssignOperatorClass:
case VAArgExprClass:
case AtomicExprClass:
case CXXThrowExprClass:
case CXXNewExprClass:
case CXXDeleteExprClass:
case CoawaitExprClass:
case DependentCoawaitExprClass:
case CoyieldExprClass:
  // These always have a side-effect.
  return true;

case StmtExprClass: {
  // StmtExprs have a side-effect if any substatement does.
  SideEffectFinder Finder(Ctx, IncludePossibleEffects);
  Finder.Visit(cast<StmtExpr>(this)->getSubStmt());
  return Finder.hasSideEffects();
}

case ExprWithCleanupsClass:
  if (IncludePossibleEffects)
    if (cast<ExprWithCleanups>(this)->cleanupsHaveSideEffects())
      return true;
  break;

case ParenExprClass:
case ArraySubscriptExprClass:
case MatrixSubscriptExprClass:
case OMPArraySectionExprClass:
case OMPArrayShapingExprClass:
case OMPIteratorExprClass:
case MemberExprClass:
case ConditionalOperatorClass:
case BinaryConditionalOperatorClass:
case CompoundLiteralExprClass:
case ExtVectorElementExprClass:
case DesignatedInitExprClass:
case DesignatedInitUpdateExprClass:
case ArrayInitLoopExprClass:
case ParenListExprClass:
case CXXPseudoDestructorExprClass:
case CXXRewrittenBinaryOperatorClass:
case CXXStdInitializerListExprClass:
case SubstNonTypeTemplateParmExprClass:
case MaterializeTemporaryExprClass:
case ShuffleVectorExprClass:
case ConvertVectorExprClass:
case AsTypeExprClass:
case CXXParenListInitExprClass:
  // These have a side-effect if any subexpression does.
  break;

case UnaryOperatorClass:
  if (cast<UnaryOperator>(this)->isIncrementDecrementOp())
    return true;
  break;

case BinaryOperatorClass:
  if (cast<BinaryOperator>(this)->isAssignmentOp())
    return true;
  break;

case InitListExprClass:
  // FIXME: The children for an InitListExpr doesn't include the array filler.
  if (const Expr *E = cast<InitListExpr>(this)->getArrayFiller())
    if (E->HasSideEffects(Ctx, IncludePossibleEffects))
      return true;
  break;

case GenericSelectionExprClass:
  return cast<GenericSelectionExpr>(this)->getResultExpr()->
      HasSideEffects(Ctx, IncludePossibleEffects);

case ChooseExprClass:
  return cast<ChooseExpr>(this)->getChosenSubExpr()->HasSideEffects(
      Ctx, IncludePossibleEffects);

case CXXDefaultArgExprClass:
  return cast<CXXDefaultArgExpr>(this)->getExpr()->HasSideEffects(
      Ctx, IncludePossibleEffects);

case CXXDefaultInitExprClass: {
  const FieldDecl *FD = cast<CXXDefaultInitExpr>(this)->getField();
  if (const Expr *E = FD->getInClassInitializer())
    return E->HasSideEffects(Ctx, IncludePossibleEffects);
  // If we've not yet parsed the initializer, assume it has side-effects.
  return true;
}

case CXXDynamicCastExprClass: {
  // A dynamic_cast expression has side-effects if it can throw.
  const CXXDynamicCastExpr *DCE = cast<CXXDynamicCastExpr>(this);
  if (DCE->getTypeAsWritten()->isReferenceType() &&
      DCE->getCastKind() == CK_Dynamic)
    return true;
  }
  [[fallthrough]];
case ImplicitCastExprClass:
case CStyleCastExprClass:
case CXXStaticCastExprClass:
case CXXReinterpretCastExprClass:
case CXXConstCastExprClass:
case CXXAddrspaceCastExprClass:
case CXXFunctionalCastExprClass:
case BuiltinBitCastExprClass: {
  // While volatile reads are side-effecting in both C and C++, we treat them
  // as having possible (not definite) side-effects. This allows idiomatic
  // code to behave without warning, such as sizeof(*v) for a volatile-
  // qualified pointer.
  if (!IncludePossibleEffects)
    break;

  const CastExpr *CE = cast<CastExpr>(this);
  if (CE->getCastKind() == CK_LValueToRValue &&
      CE->getSubExpr()->getType().isVolatileQualified())
    return true;
  break;
}

case CXXTypeidExprClass:
  // typeid might throw if its subexpression is potentially-evaluated, so has
  // side-effects in that case whether or not its subexpression does.
  return cast<CXXTypeidExpr>(this)->isPotentiallyEvaluated();

case CXXConstructExprClass:
case CXXTemporaryObjectExprClass: {
  const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
  if (!CE->getConstructor()->isTrivial() && IncludePossibleEffects)
    return true;
  // A trivial constructor does not add any side-effects of its own. Just look
  // at its arguments.
  break;
}

case CXXInheritedCtorInitExprClass: {
  const auto *ICIE = cast<CXXInheritedCtorInitExpr>(this);
  if (!ICIE->getConstructor()->isTrivial() && IncludePossibleEffects)
    return true;
  break;
}

case LambdaExprClass: {
  const LambdaExpr *LE = cast<LambdaExpr>(this);
  for (Expr *E : LE->capture_inits())
    if (E && E->HasSideEffects(Ctx, IncludePossibleEffects))
      return true;
  return false;
}

case PseudoObjectExprClass: {
  // Only look for side-effects in the semantic form, and look past
  // OpaqueValueExpr bindings in that form.
  const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
  for (PseudoObjectExpr::const_semantics_iterator I = PO->semantics_begin(),
                                                  E = PO->semantics_end();
       I != E; ++I) {
    const Expr *Subexpr = *I;
    if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(Subexpr))
      Subexpr = OVE->getSourceExpr();
    if (Subexpr->HasSideEffects(Ctx, IncludePossibleEffects))
      return true;
  }
  return false;
}

case ObjCBoxedExprClass:
case ObjCArrayLiteralClass:
case ObjCDictionaryLiteralClass:
case ObjCSelectorExprClass:
case ObjCProtocolExprClass:
case ObjCIsaExprClass:
case ObjCIndirectCopyRestoreExprClass:
case ObjCSubscriptRefExprClass:
case ObjCBridgedCastExprClass:
case ObjCMessageExprClass:
case ObjCPropertyRefExprClass:
// FIXME: Classify these cases better.
  if (IncludePossibleEffects)
    return true;
  break;
}

// Recurse to children.
for (const Stmt *SubStmt : children())
  if (SubStmt &&
      cast<Expr>(SubStmt)->HasSideEffects(Ctx, IncludePossibleEffects))
    return true;

return false;
3803}

3805FPOptions Expr::getFPFeaturesInEffect(const LangOptions &LO) const {
if (auto Call = dyn_cast<CallExpr>(this))
  return Call->getFPFeaturesInEffect(LO);
if (auto UO = dyn_cast<UnaryOperator>(this))
  return UO->getFPFeaturesInEffect(LO);
if (auto BO = dyn_cast<BinaryOperator>(this))
  return BO->getFPFeaturesInEffect(LO);
if (auto Cast = dyn_cast<CastExpr>(this))
  return Cast->getFPFeaturesInEffect(LO);
return FPOptions::defaultWithoutTrailingStorage(LO);
3815}

3817namespace {
/// Look for a call to a non-trivial function within an expression.
class NonTrivialCallFinder : public ConstEvaluatedExprVisitor<NonTrivialCallFinder>
{
  typedef ConstEvaluatedExprVisitor<NonTrivialCallFinder> Inherited;

  bool NonTrivial;

public:
  explicit NonTrivialCallFinder(const ASTContext &Context)
    : Inherited(Context), NonTrivial(false) { }

  bool hasNonTrivialCall() const { return NonTrivial; }

  void VisitCallExpr(const CallExpr *E) {
    if (const CXXMethodDecl *Method
        = dyn_cast_or_null<const CXXMethodDecl>(E->getCalleeDecl())) {
      if (Method->isTrivial()) {
        // Recurse to children of the call.
        Inherited::VisitStmt(E);
        return;
      }
    }

    NonTrivial = true;
  }

  void VisitCXXConstructExpr(const CXXConstructExpr *E) {
    if (E->getConstructor()->isTrivial()) {
      // Recurse to children of the call.
      Inherited::VisitStmt(E);
      return;
    }

    NonTrivial = true;
  }

  void VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *E) {
    if (E->getTemporary()->getDestructor()->isTrivial()) {
      Inherited::VisitStmt(E);
      return;
    }

    NonTrivial = true;
  }
};
3863}

3865bool Expr::hasNonTrivialCall(const ASTContext &Ctx) const {
NonTrivialCallFinder Finder(Ctx);
Finder.Visit(this);
return Finder.hasNonTrivialCall();
3869}

3871/// isNullPointerConstant - C99 6.3.2.3p3 - Return whether this is a null
3872/// pointer constant or not, as well as the specific kind of constant detected.
3873/// Null pointer constants can be integer constant expressions with the
3874/// value zero, casts of zero to void*, nullptr (C++0X), or __null
3875/// (a GNU extension).
3876Expr::NullPointerConstantKind
3877Expr::isNullPointerConstant(ASTContext &Ctx,
                          NullPointerConstantValueDependence NPC) const {
if (isValueDependent() &&
    (!Ctx.getLangOpts().CPlusPlus11 || Ctx.getLangOpts().MSVCCompat)) {
  // Error-dependent expr should never be a null pointer.
  if (containsErrors())
    return NPCK_NotNull;
  switch (NPC) {
  case NPC_NeverValueDependent:
    llvm_unreachable("Unexpected value dependent expression!")::llvm::llvm_unreachable_internal("Unexpected value dependent expression!"
, "clang/lib/AST/Expr.cpp", 3886);
  case NPC_ValueDependentIsNull:
    if (isTypeDependent() || getType()->isIntegralType(Ctx))
      return NPCK_ZeroExpression;
    else
      return NPCK_NotNull;

  case NPC_ValueDependentIsNotNull:
    return NPCK_NotNull;
  }
}

// Strip off a cast to void*, if it exists. Except in C++.
if (const ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(this)) {
  if (!Ctx.getLangOpts().CPlusPlus) {
    // Check that it is a cast to void*.
    if (const PointerType *PT = CE->getType()->getAs<PointerType>()) {
      QualType Pointee = PT->getPointeeType();
      Qualifiers Qs = Pointee.getQualifiers();
      // Only (void*)0 or equivalent are treated as nullptr. If pointee type
      // has non-default address space it is not treated as nullptr.
      // (__generic void*)0 in OpenCL 2.0 should not be treated as nullptr
      // since it cannot be assigned to a pointer to constant address space.
      if (Ctx.getLangOpts().OpenCL &&
          Pointee.getAddressSpace() == Ctx.getDefaultOpenCLPointeeAddrSpace())
        Qs.removeAddressSpace();

      if (Pointee->isVoidType() && Qs.empty() && // to void*
          CE->getSubExpr()->getType()->isIntegerType()) // from int
        return CE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
    }
  }
} else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(this)) {
  // Ignore the ImplicitCastExpr type entirely.
  return ICE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
} else if (const ParenExpr *PE = dyn_cast<ParenExpr>(this)) {
  // Accept ((void*)0) as a null pointer constant, as many other
  // implementations do.
  return PE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
} else if (const GenericSelectionExpr *GE =
             dyn_cast<GenericSelectionExpr>(this)) {
  if (GE->isResultDependent())
    return NPCK_NotNull;
  return GE->getResultExpr()->isNullPointerConstant(Ctx, NPC);
} else if (const ChooseExpr *CE = dyn_cast<ChooseExpr>(this)) {
  if (CE->isConditionDependent())
    return NPCK_NotNull;
  return CE->getChosenSubExpr()->isNullPointerConstant(Ctx, NPC);
} else if (const CXXDefaultArgExpr *DefaultArg
             = dyn_cast<CXXDefaultArgExpr>(this)) {
  // See through default argument expressions.
  return DefaultArg->getExpr()->isNullPointerConstant(Ctx, NPC);
} else if (const CXXDefaultInitExpr *DefaultInit
             = dyn_cast<CXXDefaultInitExpr>(this)) {
  // See through default initializer expressions.
  return DefaultInit->getExpr()->isNullPointerConstant(Ctx, NPC);
} else if (isa<GNUNullExpr>(this)) {
  // The GNU __null extension is always a null pointer constant.
  return NPCK_GNUNull;
} else if (const MaterializeTemporaryExpr *M
                                 = dyn_cast<MaterializeTemporaryExpr>(this)) {
  return M->getSubExpr()->isNullPointerConstant(Ctx, NPC);
} else if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(this)) {
  if (const Expr *Source = OVE->getSourceExpr())
    return Source->isNullPointerConstant(Ctx, NPC);
}

// If the expression has no type information, it cannot be a null pointer
// constant.
if (getType().isNull())
  return NPCK_NotNull;

// C++11/C2x nullptr_t is always a null pointer constant.
if (getType()->isNullPtrType())
  return NPCK_CXX11_nullptr;

if (const RecordType *UT = getType()->getAsUnionType())
  if (!Ctx.getLangOpts().CPlusPlus11 &&
      UT && UT->getDecl()->hasAttr<TransparentUnionAttr>())
    if (const CompoundLiteralExpr *CLE = dyn_cast<CompoundLiteralExpr>(this)){
      const Expr *InitExpr = CLE->getInitializer();
      if (const InitListExpr *ILE = dyn_cast<InitListExpr>(InitExpr))
        return ILE->getInit(0)->isNullPointerConstant(Ctx, NPC);
    }
// This expression must be an integer type.
if (!getType()->isIntegerType() ||
    (Ctx.getLangOpts().CPlusPlus && getType()->isEnumeralType()))
  return NPCK_NotNull;

if (Ctx.getLangOpts().CPlusPlus11) {
  // C++11 [conv.ptr]p1: A null pointer constant is an integer literal with
  // value zero or a prvalue of type std::nullptr_t.
  // Microsoft mode permits C++98 rules reflecting MSVC behavior.
  const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(this);
  if (Lit && !Lit->getValue())
    return NPCK_ZeroLiteral;
  if (!Ctx.getLangOpts().MSVCCompat || !isCXX98IntegralConstantExpr(Ctx))
    return NPCK_NotNull;
} else {
  // If we have an integer constant expression, we need to *evaluate* it and
  // test for the value 0.
  if (!isIntegerConstantExpr(Ctx))
    return NPCK_NotNull;
}

if (EvaluateKnownConstInt(Ctx) != 0)
  return NPCK_NotNull;

if (isa<IntegerLiteral>(this))
  return NPCK_ZeroLiteral;
return NPCK_ZeroExpression;
3997}

3999/// If this expression is an l-value for an Objective C
4000/// property, find the underlying property reference expression.
4001const ObjCPropertyRefExpr *Expr::getObjCProperty() const {
const Expr *E = this;
while (true) {
  assert((E->isLValue() && E->getObjectKind() == OK_ObjCProperty) &&(static_cast <bool> ((E->isLValue() && E->
getObjectKind() == OK_ObjCProperty) && "expression is not a property reference"
) ? void (0) : __assert_fail ("(E->isLValue() && E->getObjectKind() == OK_ObjCProperty) && \"expression is not a property reference\""
, "clang/lib/AST/Expr.cpp", 4005, __extension__ __PRETTY_FUNCTION__
))
         "expression is not a property reference")(static_cast <bool> ((E->isLValue() && E->
getObjectKind() == OK_ObjCProperty) && "expression is not a property reference"
) ? void (0) : __assert_fail ("(E->isLValue() && E->getObjectKind() == OK_ObjCProperty) && \"expression is not a property reference\""
, "clang/lib/AST/Expr.cpp", 4005, __extension__ __PRETTY_FUNCTION__
));
  E = E->IgnoreParenCasts();
  if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
    if (BO->getOpcode() == BO_Comma) {
      E = BO->getRHS();
      continue;
    }
  }

  break;
}

return cast<ObjCPropertyRefExpr>(E);
4018}

4020bool Expr::isObjCSelfExpr() const {
const Expr *E = IgnoreParenImpCasts();

const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E);
if (!DRE)
  return false;

const ImplicitParamDecl *Param = dyn_cast<ImplicitParamDecl>(DRE->getDecl());
if (!Param)
  return false;

const ObjCMethodDecl *M = dyn_cast<ObjCMethodDecl>(Param->getDeclContext());
if (!M)
  return false;

return M->getSelfDecl() == Param;
4036}

4038FieldDecl *Expr::getSourceBitField() {
Expr *E = this->IgnoreParens();

while (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
  if (ICE->getCastKind() == CK_LValueToRValue ||
      (ICE->isGLValue() && ICE->getCastKind() == CK_NoOp))
    E = ICE->getSubExpr()->IgnoreParens();
  else
    break;
}

if (MemberExpr *MemRef = dyn_cast<MemberExpr>(E))
  if (FieldDecl *Field = dyn_cast<FieldDecl>(MemRef->getMemberDecl()))
    if (Field->isBitField())
      return Field;

if (ObjCIvarRefExpr *IvarRef = dyn_cast<ObjCIvarRefExpr>(E)) {
  FieldDecl *Ivar = IvarRef->getDecl();
  if (Ivar->isBitField())
    return Ivar;
}

if (DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E)) {
  if (FieldDecl *Field = dyn_cast<FieldDecl>(DeclRef->getDecl()))
    if (Field->isBitField())
      return Field;

  if (BindingDecl *BD = dyn_cast<BindingDecl>(DeclRef->getDecl()))
    if (Expr *E = BD->getBinding())
      return E->getSourceBitField();
}

if (BinaryOperator *BinOp = dyn_cast<BinaryOperator>(E)) {
  if (BinOp->isAssignmentOp() && BinOp->getLHS())
    return BinOp->getLHS()->getSourceBitField();

  if (BinOp->getOpcode() == BO_Comma && BinOp->getRHS())
    return BinOp->getRHS()->getSourceBitField();
}

if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(E))
  if (UnOp->isPrefix() && UnOp->isIncrementDecrementOp())
    return UnOp->getSubExpr()->getSourceBitField();

return nullptr;
4083}

4085bool Expr::refersToVectorElement() const {
// FIXME: Why do we not just look at the ObjectKind here?
const Expr *E = this->IgnoreParens();

while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
  if (ICE->isGLValue() && ICE->getCastKind() == CK_NoOp)
    E = ICE->getSubExpr()->IgnoreParens();
  else
    break;
}

if (const ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E))
  return ASE->getBase()->getType()->isVectorType();

if (isa<ExtVectorElementExpr>(E))
  return true;

if (auto *DRE = dyn_cast<DeclRefExpr>(E))
  if (auto *BD = dyn_cast<BindingDecl>(DRE->getDecl()))
    if (auto *E = BD->getBinding())
      return E->refersToVectorElement();

return false;
4108}

4110bool Expr::refersToGlobalRegisterVar() const {
const Expr *E = this->IgnoreParenImpCasts();

if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E))
  if (const auto *VD = dyn_cast<VarDecl>(DRE->getDecl()))
    if (VD->getStorageClass() == SC_Register &&
        VD->hasAttr<AsmLabelAttr>() && !VD->isLocalVarDecl())
      return true;

return false;
4120}

4122bool Expr::isSameComparisonOperand(const Expr* E1, const Expr* E2) {
E1 = E1->IgnoreParens();
E2 = E2->IgnoreParens();

if (E1->getStmtClass() != E2->getStmtClass())
  return false;

switch (E1->getStmtClass()) {
  default:
    return false;
  case CXXThisExprClass:
    return true;
  case DeclRefExprClass: {
    // DeclRefExpr without an ImplicitCastExpr can happen for integral
    // template parameters.
    const auto *DRE1 = cast<DeclRefExpr>(E1);
    const auto *DRE2 = cast<DeclRefExpr>(E2);
    return DRE1->isPRValue() && DRE2->isPRValue() &&
           DRE1->getDecl() == DRE2->getDecl();
  }
  case ImplicitCastExprClass: {
    // Peel off implicit casts.
    while (true) {
      const auto *ICE1 = dyn_cast<ImplicitCastExpr>(E1);
      const auto *ICE2 = dyn_cast<ImplicitCastExpr>(E2);
      if (!ICE1 || !ICE2)
        return false;
      if (ICE1->getCastKind() != ICE2->getCastKind())
        return false;
      E1 = ICE1->getSubExpr()->IgnoreParens();
      E2 = ICE2->getSubExpr()->IgnoreParens();
      // The final cast must be one of these types.
      if (ICE1->getCastKind() == CK_LValueToRValue ||
          ICE1->getCastKind() == CK_ArrayToPointerDecay ||
          ICE1->getCastKind() == CK_FunctionToPointerDecay) {
        break;
      }
    }

    const auto *DRE1 = dyn_cast<DeclRefExpr>(E1);
    const auto *DRE2 = dyn_cast<DeclRefExpr>(E2);
    if (DRE1 && DRE2)
      return declaresSameEntity(DRE1->getDecl(), DRE2->getDecl());

    const auto *Ivar1 = dyn_cast<ObjCIvarRefExpr>(E1);
    const auto *Ivar2 = dyn_cast<ObjCIvarRefExpr>(E2);
    if (Ivar1 && Ivar2) {
      return Ivar1->isFreeIvar() && Ivar2->isFreeIvar() &&
             declaresSameEntity(Ivar1->getDecl(), Ivar2->getDecl());
    }

    const auto *Array1 = dyn_cast<ArraySubscriptExpr>(E1);
    const auto *Array2 = dyn_cast<ArraySubscriptExpr>(E2);
    if (Array1 && Array2) {
      if (!isSameComparisonOperand(Array1->getBase(), Array2->getBase()))
        return false;

      auto Idx1 = Array1->getIdx();
      auto Idx2 = Array2->getIdx();
      const auto Integer1 = dyn_cast<IntegerLiteral>(Idx1);
      const auto Integer2 = dyn_cast<IntegerLiteral>(Idx2);
      if (Integer1 && Integer2) {
        if (!llvm::APInt::isSameValue(Integer1->getValue(),
                                      Integer2->getValue()))
          return false;
      } else {
        if (!isSameComparisonOperand(Idx1, Idx2))
          return false;
      }

      return true;
    }

    // Walk the MemberExpr chain.
    while (isa<MemberExpr>(E1) && isa<MemberExpr>(E2)) {
      const auto *ME1 = cast<MemberExpr>(E1);
      const auto *ME2 = cast<MemberExpr>(E2);
      if (!declaresSameEntity(ME1->getMemberDecl(), ME2->getMemberDecl()))
        return false;
      if (const auto *D = dyn_cast<VarDecl>(ME1->getMemberDecl()))
        if (D->isStaticDataMember())
          return true;
      E1 = ME1->getBase()->IgnoreParenImpCasts();
      E2 = ME2->getBase()->IgnoreParenImpCasts();
    }

    if (isa<CXXThisExpr>(E1) && isa<CXXThisExpr>(E2))
      return true;

    // A static member variable can end the MemberExpr chain with either
    // a MemberExpr or a DeclRefExpr.
    auto getAnyDecl = [](const Expr *E) -> const ValueDecl * {
      if (const auto *DRE = dyn_cast<DeclRefExpr>(E))
        return DRE->getDecl();
      if (const auto *ME = dyn_cast<MemberExpr>(E))
        return ME->getMemberDecl();
      return nullptr;
    };

    const ValueDecl *VD1 = getAnyDecl(E1);
    const ValueDecl *VD2 = getAnyDecl(E2);
    return declaresSameEntity(VD1, VD2);
  }
}
4226}

4228/// isArrow - Return true if the base expression is a pointer to vector,
4229/// return false if the base expression is a vector.
4230bool ExtVectorElementExpr::isArrow() const {
return getBase()->getType()->isPointerType();
4232}

4234unsigned ExtVectorElementExpr::getNumElements() const {
if (const VectorType *VT = getType()->getAs<VectorType>())
  return VT->getNumElements();
return 1;
4238}

4240/// containsDuplicateElements - Return true if any element access is repeated.
4241bool ExtVectorElementExpr::containsDuplicateElements() const {
// FIXME: Refactor this code to an accessor on the AST node which returns the
// "type" of component access, and share with code below and in Sema.
StringRef Comp = Accessor->getName();

// Halving swizzles do not contain duplicate elements.
if (Comp == "hi" || Comp == "lo" || Comp == "even" || Comp == "odd")
  return false;

// Advance past s-char prefix on hex swizzles.
if (Comp[0] == 's' || Comp[0] == 'S')
  Comp = Comp.substr(1);

for (unsigned i = 0, e = Comp.size(); i != e; ++i)
  if (Comp.substr(i + 1).contains(Comp[i]))
      return true;

return false;
4259}

4261/// getEncodedElementAccess - We encode the fields as a llvm ConstantArray.
4262void ExtVectorElementExpr::getEncodedElementAccess(
  SmallVectorImpl<uint32_t> &Elts) const {
StringRef Comp = Accessor->getName();
bool isNumericAccessor = false;
if (Comp[0] == 's' || Comp[0] == 'S') {
  Comp = Comp.substr(1);
  isNumericAccessor = true;
}

bool isHi =   Comp == "hi";
bool isLo =   Comp == "lo";
bool isEven = Comp == "even";
bool isOdd  = Comp == "odd";

for (unsigned i = 0, e = getNumElements(); i != e; ++i) {
  uint64_t Index;

  if (isHi)
    Index = e + i;
  else if (isLo)
    Index = i;
  else if (isEven)
    Index = 2 * i;
  else if (isOdd)
    Index = 2 * i + 1;
  else
    Index = ExtVectorType::getAccessorIdx(Comp[i], isNumericAccessor);

  Elts.push_back(Index);
}
4292}

4294ShuffleVectorExpr::ShuffleVectorExpr(const ASTContext &C, ArrayRef<Expr *> args,
                                   QualType Type, SourceLocation BLoc,
                                   SourceLocation RP)
  : Expr(ShuffleVectorExprClass, Type, VK_PRValue, OK_Ordinary),
    BuiltinLoc(BLoc), RParenLoc(RP), NumExprs(args.size()) {
SubExprs = new (C) Stmt*[args.size()];
for (unsigned i = 0; i != args.size(); i++)
  SubExprs[i] = args[i];

setDependence(computeDependence(this));
4304}

4306void ShuffleVectorExpr::setExprs(const ASTContext &C, ArrayRef<Expr *> Exprs) {
if (SubExprs) C.Deallocate(SubExprs);

this->NumExprs = Exprs.size();
SubExprs = new (C) Stmt*[NumExprs];
memcpy(SubExprs, Exprs.data(), sizeof(Expr *) * Exprs.size());
4312}

4314GenericSelectionExpr::GenericSelectionExpr(
  const ASTContext &, SourceLocation GenericLoc, Expr *ControllingExpr,
  ArrayRef<TypeSourceInfo *> AssocTypes, ArrayRef<Expr *> AssocExprs,
  SourceLocation DefaultLoc, SourceLocation RParenLoc,
  bool ContainsUnexpandedParameterPack, unsigned ResultIndex)
  : Expr(GenericSelectionExprClass, AssocExprs[ResultIndex]->getType(),
         AssocExprs[ResultIndex]->getValueKind(),
         AssocExprs[ResultIndex]->getObjectKind()),
    NumAssocs(AssocExprs.size()), ResultIndex(ResultIndex),
    DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
assert(AssocTypes.size() == AssocExprs.size() &&(static_cast <bool> (AssocTypes.size() == AssocExprs.size
() && "Must have the same number of association expressions"
 " and TypeSourceInfo!") ? void (0) : __assert_fail ("AssocTypes.size() == AssocExprs.size() && \"Must have the same number of association expressions\" \" and TypeSourceInfo!\""
, "clang/lib/AST/Expr.cpp", 4326, __extension__ __PRETTY_FUNCTION__
))
       "Must have the same number of association expressions"(static_cast <bool> (AssocTypes.size() == AssocExprs.size
() && "Must have the same number of association expressions"
 " and TypeSourceInfo!") ? void (0) : __assert_fail ("AssocTypes.size() == AssocExprs.size() && \"Must have the same number of association expressions\" \" and TypeSourceInfo!\""
, "clang/lib/AST/Expr.cpp", 4326, __extension__ __PRETTY_FUNCTION__
))
       " and TypeSourceInfo!")(static_cast <bool> (AssocTypes.size() == AssocExprs.size
() && "Must have the same number of association expressions"
 " and TypeSourceInfo!") ? void (0) : __assert_fail ("AssocTypes.size() == AssocExprs.size() && \"Must have the same number of association expressions\" \" and TypeSourceInfo!\""
, "clang/lib/AST/Expr.cpp", 4326, __extension__ __PRETTY_FUNCTION__
));
assert(ResultIndex < NumAssocs && "ResultIndex is out-of-bounds!")(static_cast <bool> (ResultIndex < NumAssocs &&
 "ResultIndex is out-of-bounds!") ? void (0) : __assert_fail (
"ResultIndex < NumAssocs && \"ResultIndex is out-of-bounds!\""
, "clang/lib/AST/Expr.cpp", 4327, __extension__ __PRETTY_FUNCTION__
));

GenericSelectionExprBits.GenericLoc = GenericLoc;
getTrailingObjects<Stmt *>()[ControllingIndex] = ControllingExpr;
std::copy(AssocExprs.begin(), AssocExprs.end(),
          getTrailingObjects<Stmt *>() + AssocExprStartIndex);
std::copy(AssocTypes.begin(), AssocTypes.end(),
          getTrailingObjects<TypeSourceInfo *>());

setDependence(computeDependence(this, ContainsUnexpandedParameterPack));
4337}

4339GenericSelectionExpr::GenericSelectionExpr(
  const ASTContext &Context, SourceLocation GenericLoc, Expr *ControllingExpr,
  ArrayRef<TypeSourceInfo *> AssocTypes, ArrayRef<Expr *> AssocExprs,
  SourceLocation DefaultLoc, SourceLocation RParenLoc,
  bool ContainsUnexpandedParameterPack)
  : Expr(GenericSelectionExprClass, Context.DependentTy, VK_PRValue,
         OK_Ordinary),
    NumAssocs(AssocExprs.size()), ResultIndex(ResultDependentIndex),
    DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
assert(AssocTypes.size() == AssocExprs.size() &&(static_cast <bool> (AssocTypes.size() == AssocExprs.size
() && "Must have the same number of association expressions"
 " and TypeSourceInfo!") ? void (0) : __assert_fail ("AssocTypes.size() == AssocExprs.size() && \"Must have the same number of association expressions\" \" and TypeSourceInfo!\""
, "clang/lib/AST/Expr.cpp", 4350, __extension__ __PRETTY_FUNCTION__
))
       "Must have the same number of association expressions"(static_cast <bool> (AssocTypes.size() == AssocExprs.size
() && "Must have the same number of association expressions"
 " and TypeSourceInfo!") ? void (0) : __assert_fail ("AssocTypes.size() == AssocExprs.size() && \"Must have the same number of association expressions\" \" and TypeSourceInfo!\""
, "clang/lib/AST/Expr.cpp", 4350, __extension__ __PRETTY_FUNCTION__
))
       " and TypeSourceInfo!")(static_cast <bool> (AssocTypes.size() == AssocExprs.size
() && "Must have the same number of association expressions"
 " and TypeSourceInfo!") ? void (0) : __assert_fail ("AssocTypes.size() == AssocExprs.size() && \"Must have the same number of association expressions\" \" and TypeSourceInfo!\""
, "clang/lib/AST/Expr.cpp", 4350, __extension__ __PRETTY_FUNCTION__
));

GenericSelectionExprBits.GenericLoc = GenericLoc;
getTrailingObjects<Stmt *>()[ControllingIndex] = ControllingExpr;
std::copy(AssocExprs.begin(), AssocExprs.end(),
          getTrailingObjects<Stmt *>() + AssocExprStartIndex);
std::copy(AssocTypes.begin(), AssocTypes.end(),
          getTrailingObjects<TypeSourceInfo *>());

setDependence(computeDependence(this, ContainsUnexpandedParameterPack));
4360}

4362GenericSelectionExpr::GenericSelectionExpr(EmptyShell Empty, unsigned NumAssocs)
  : Expr(GenericSelectionExprClass, Empty), NumAssocs(NumAssocs) {}

4365GenericSelectionExpr *GenericSelectionExpr::Create(
  const ASTContext &Context, SourceLocation GenericLoc, Expr *ControllingExpr,
  ArrayRef<TypeSourceInfo *> AssocTypes, ArrayRef<Expr *> AssocExprs,
  SourceLocation DefaultLoc, SourceLocation RParenLoc,
  bool ContainsUnexpandedParameterPack, unsigned ResultIndex) {
unsigned NumAssocs = AssocExprs.size();
void *Mem = Context.Allocate(
    totalSizeToAlloc<Stmt *, TypeSourceInfo *>(1 + NumAssocs, NumAssocs),
    alignof(GenericSelectionExpr));
return new (Mem) GenericSelectionExpr(
    Context, GenericLoc, ControllingExpr, AssocTypes, AssocExprs, DefaultLoc,
    RParenLoc, ContainsUnexpandedParameterPack, ResultIndex);
4377}

4379GenericSelectionExpr *GenericSelectionExpr::Create(
  const ASTContext &Context, SourceLocation GenericLoc, Expr *ControllingExpr,
  ArrayRef<TypeSourceInfo *> AssocTypes, ArrayRef<Expr *> AssocExprs,
  SourceLocation DefaultLoc, SourceLocation RParenLoc,
  bool ContainsUnexpandedParameterPack) {
unsigned NumAssocs = AssocExprs.size();
void *Mem = Context.Allocate(
    totalSizeToAlloc<Stmt *, TypeSourceInfo *>(1 + NumAssocs, NumAssocs),
    alignof(GenericSelectionExpr));
return new (Mem) GenericSelectionExpr(
    Context, GenericLoc, ControllingExpr, AssocTypes, AssocExprs, DefaultLoc,
    RParenLoc, ContainsUnexpandedParameterPack);
4391}

4393GenericSelectionExpr *
4394GenericSelectionExpr::CreateEmpty(const ASTContext &Context,
                                unsigned NumAssocs) {
void *Mem = Context.Allocate(
    totalSizeToAlloc<Stmt *, TypeSourceInfo *>(1 + NumAssocs, NumAssocs),
    alignof(GenericSelectionExpr));
return new (Mem) GenericSelectionExpr(EmptyShell(), NumAssocs);
4400}

4402//===----------------------------------------------------------------------===//
4403//  DesignatedInitExpr
4404//===----------------------------------------------------------------------===//

4406IdentifierInfo *DesignatedInitExpr::Designator::getFieldName() const {
assert(Kind == FieldDesignator && "Only valid on a field designator")(static_cast <bool> (Kind == FieldDesignator &&
 "Only valid on a field designator") ? void (0) : __assert_fail
 ("Kind == FieldDesignator && \"Only valid on a field designator\""
, "clang/lib/AST/Expr.cpp", 4407, __extension__ __PRETTY_FUNCTION__
));
if (Field.NameOrField & 0x01)
  return reinterpret_cast<IdentifierInfo *>(Field.NameOrField & ~0x01);
return getField()->getIdentifier();
4411}

4413DesignatedInitExpr::DesignatedInitExpr(const ASTContext &C, QualType Ty,
                                     llvm::ArrayRef<Designator> Designators,
                                     SourceLocation EqualOrColonLoc,
                                     bool GNUSyntax,
                                     ArrayRef<Expr *> IndexExprs, Expr *Init)
  : Expr(DesignatedInitExprClass, Ty, Init->getValueKind(),
         Init->getObjectKind()),
    EqualOrColonLoc(EqualOrColonLoc), GNUSyntax(GNUSyntax),
    NumDesignators(Designators.size()), NumSubExprs(IndexExprs.size() + 1) {
this->Designators = new (C) Designator[NumDesignators];

// Record the initializer itself.
child_iterator Child = child_begin();
*Child++ = Init;

// Copy the designators and their subexpressions, computing
// value-dependence along the way.
unsigned IndexIdx = 0;
for (unsigned I = 0; I != NumDesignators; ++I) {
  this->Designators[I] = Designators[I];
  if (this->Designators[I].isArrayDesignator()) {
    // Copy the index expressions into permanent storage.
    *Child++ = IndexExprs[IndexIdx++];
  } else if (this->Designators[I].isArrayRangeDesignator()) {
    // Copy the start/end expressions into permanent storage.
    *Child++ = IndexExprs[IndexIdx++];
    *Child++ = IndexExprs[IndexIdx++];
  }
}

assert(IndexIdx == IndexExprs.size() && "Wrong number of index expressions")(static_cast <bool> (IndexIdx == IndexExprs.size() &&
 "Wrong number of index expressions") ? void (0) : __assert_fail
 ("IndexIdx == IndexExprs.size() && \"Wrong number of index expressions\""
, "clang/lib/AST/Expr.cpp", 4443, __extension__ __PRETTY_FUNCTION__
));
setDependence(computeDependence(this));
4445}

4447DesignatedInitExpr *
4448DesignatedInitExpr::Create(const ASTContext &C,
                         llvm::ArrayRef<Designator> Designators,
                         ArrayRef<Expr*> IndexExprs,
                         SourceLocation ColonOrEqualLoc,
                         bool UsesColonSyntax, Expr *Init) {
void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(IndexExprs.size() + 1),
                       alignof(DesignatedInitExpr));
return new (Mem) DesignatedInitExpr(C, C.VoidTy, Designators,
                                    ColonOrEqualLoc, UsesColonSyntax,
                                    IndexExprs, Init);
4458}

4460DesignatedInitExpr *DesignatedInitExpr::CreateEmpty(const ASTContext &C,
                                                  unsigned NumIndexExprs) {
void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(NumIndexExprs + 1),
                       alignof(DesignatedInitExpr));
return new (Mem) DesignatedInitExpr(NumIndexExprs + 1);
4465}

4467void DesignatedInitExpr::setDesignators(const ASTContext &C,
                                      const Designator *Desigs,
                                      unsigned NumDesigs) {
Designators = new (C) Designator[NumDesigs];
NumDesignators = NumDesigs;
for (unsigned I = 0; I != NumDesigs; ++I)
  Designators[I] = Desigs[I];
4474}

4476SourceRange DesignatedInitExpr::getDesignatorsSourceRange() const {
DesignatedInitExpr *DIE = const_cast<DesignatedInitExpr*>(this);
if (size() == 1)
  return DIE->getDesignator(0)->getSourceRange();
return SourceRange(DIE->getDesignator(0)->getBeginLoc(),
                   DIE->getDesignator(size() - 1)->getEndLoc());
4482}

4484SourceLocation DesignatedInitExpr::getBeginLoc() const {
SourceLocation StartLoc;
auto *DIE = const_cast<DesignatedInitExpr *>(this);
Designator &First = *DIE->getDesignator(0);
if (First.isFieldDesignator())
  StartLoc = GNUSyntax ? First.Field.FieldLoc : First.Field.DotLoc;
else
  StartLoc = First.ArrayOrRange.LBracketLoc;
return StartLoc;
4493}

4495SourceLocation DesignatedInitExpr::getEndLoc() const {
return getInit()->getEndLoc();
4497}

4499Expr *DesignatedInitExpr::getArrayIndex(const Designator& D) const {
assert(D.Kind == Designator::ArrayDesignator && "Requires array designator")(static_cast <bool> (D.Kind == Designator::ArrayDesignator
 && "Requires array designator") ? void (0) : __assert_fail
 ("D.Kind == Designator::ArrayDesignator && \"Requires array designator\""
, "clang/lib/AST/Expr.cpp", 4500, __extension__ __PRETTY_FUNCTION__
));
return getSubExpr(D.ArrayOrRange.Index + 1);
4502}

4504Expr *DesignatedInitExpr::getArrayRangeStart(const Designator &D) const {
assert(D.Kind == Designator::ArrayRangeDesignator &&(static_cast <bool> (D.Kind == Designator::ArrayRangeDesignator
 && "Requires array range designator") ? void (0) : __assert_fail
 ("D.Kind == Designator::ArrayRangeDesignator && \"Requires array range designator\""
, "clang/lib/AST/Expr.cpp", 4506, __extension__ __PRETTY_FUNCTION__
))
       "Requires array range designator")(static_cast <bool> (D.Kind == Designator::ArrayRangeDesignator
 && "Requires array range designator") ? void (0) : __assert_fail
 ("D.Kind == Designator::ArrayRangeDesignator && \"Requires array range designator\""
, "clang/lib/AST/Expr.cpp", 4506, __extension__ __PRETTY_FUNCTION__
));
return getSubExpr(D.ArrayOrRange.Index + 1);
4508}

4510Expr *DesignatedInitExpr::getArrayRangeEnd(const Designator &D) const {
assert(D.Kind == Designator::ArrayRangeDesignator &&(static_cast <bool> (D.Kind == Designator::ArrayRangeDesignator
 && "Requires array range designator") ? void (0) : __assert_fail
 ("D.Kind == Designator::ArrayRangeDesignator && \"Requires array range designator\""
, "clang/lib/AST/Expr.cpp", 4512, __extension__ __PRETTY_FUNCTION__
))
       "Requires array range designator")(static_cast <bool> (D.Kind == Designator::ArrayRangeDesignator
 && "Requires array range designator") ? void (0) : __assert_fail
 ("D.Kind == Designator::ArrayRangeDesignator && \"Requires array range designator\""
, "clang/lib/AST/Expr.cpp", 4512, __extension__ __PRETTY_FUNCTION__
));
return getSubExpr(D.ArrayOrRange.Index + 2);
4514}

4516/// Replaces the designator at index @p Idx with the series
4517/// of designators in [First, Last).
4518void DesignatedInitExpr::ExpandDesignator(const ASTContext &C, unsigned Idx,
                                        const Designator *First,
                                        const Designator *Last) {
unsigned NumNewDesignators = Last - First;
if (NumNewDesignators == 0) {
  std::copy_backward(Designators + Idx + 1,
                     Designators + NumDesignators,
                     Designators + Idx);
  --NumNewDesignators;
  return;
}
if (NumNewDesignators == 1) {
  Designators[Idx] = *First;
  return;
}

Designator *NewDesignators
  = new (C) Designator[NumDesignators - 1 + NumNewDesignators];
std::copy(Designators, Designators + Idx, NewDesignators);
std::copy(First, Last, NewDesignators + Idx);
std::copy(Designators + Idx + 1, Designators + NumDesignators,
          NewDesignators + Idx + NumNewDesignators);
Designators = NewDesignators;
NumDesignators = NumDesignators - 1 + NumNewDesignators;
4542}

4544DesignatedInitUpdateExpr::DesignatedInitUpdateExpr(const ASTContext &C,
                                                 SourceLocation lBraceLoc,
                                                 Expr *baseExpr,
                                                 SourceLocation rBraceLoc)
  : Expr(DesignatedInitUpdateExprClass, baseExpr->getType(), VK_PRValue,
         OK_Ordinary) {
BaseAndUpdaterExprs[0] = baseExpr;

InitListExpr *ILE =
    new (C) InitListExpr(C, lBraceLoc, std::nullopt, rBraceLoc);
ILE->setType(baseExpr->getType());
BaseAndUpdaterExprs[1] = ILE;

// FIXME: this is wrong, set it correctly.
setDependence(ExprDependence::None);
4559}

4561SourceLocation DesignatedInitUpdateExpr::getBeginLoc() const {
return getBase()->getBeginLoc();
4563}

4565SourceLocation DesignatedInitUpdateExpr::getEndLoc() const {
return getBase()->getEndLoc();
4567}

4569ParenListExpr::ParenListExpr(SourceLocation LParenLoc, ArrayRef<Expr *> Exprs,
                           SourceLocation RParenLoc)
  : Expr(ParenListExprClass, QualType(), VK_PRValue, OK_Ordinary),
    LParenLoc(LParenLoc), RParenLoc(RParenLoc) {
ParenListExprBits.NumExprs = Exprs.size();

for (unsigned I = 0, N = Exprs.size(); I != N; ++I)
  getTrailingObjects<Stmt *>()[I] = Exprs[I];
setDependence(computeDependence(this));
4578}

4580ParenListExpr::ParenListExpr(EmptyShell Empty, unsigned NumExprs)
  : Expr(ParenListExprClass, Empty) {
ParenListExprBits.NumExprs = NumExprs;
4583}

4585ParenListExpr *ParenListExpr::Create(const ASTContext &Ctx,
                                   SourceLocation LParenLoc,
                                   ArrayRef<Expr *> Exprs,
                                   SourceLocation RParenLoc) {
void *Mem = Ctx.Allocate(totalSizeToAlloc<Stmt *>(Exprs.size()),
                         alignof(ParenListExpr));
return new (Mem) ParenListExpr(LParenLoc, Exprs, RParenLoc);
4592}

4594ParenListExpr *ParenListExpr::CreateEmpty(const ASTContext &Ctx,
                                        unsigned NumExprs) {
void *Mem =
    Ctx.Allocate(totalSizeToAlloc<Stmt *>(NumExprs), alignof(ParenListExpr));
return new (Mem) ParenListExpr(EmptyShell(), NumExprs);
4599}

4601BinaryOperator::BinaryOperator(const ASTContext &Ctx, Expr *lhs, Expr *rhs,
                             Opcode opc, QualType ResTy, ExprValueKind VK,
                             ExprObjectKind OK, SourceLocation opLoc,
                             FPOptionsOverride FPFeatures)
  : Expr(BinaryOperatorClass, ResTy, VK, OK) {
BinaryOperatorBits.Opc = opc;
assert(!isCompoundAssignmentOp() &&(static_cast <bool> (!isCompoundAssignmentOp() &&
 "Use CompoundAssignOperator for compound assignments") ? void
 (0) : __assert_fail ("!isCompoundAssignmentOp() && \"Use CompoundAssignOperator for compound assignments\""
, "clang/lib/AST/Expr.cpp", 4608, __extension__ __PRETTY_FUNCTION__
))
       "Use CompoundAssignOperator for compound assignments")(static_cast <bool> (!isCompoundAssignmentOp() &&
 "Use CompoundAssignOperator for compound assignments") ? void
 (0) : __assert_fail ("!isCompoundAssignmentOp() && \"Use CompoundAssignOperator for compound assignments\""
, "clang/lib/AST/Expr.cpp", 4608, __extension__ __PRETTY_FUNCTION__
));
BinaryOperatorBits.OpLoc = opLoc;
SubExprs[LHS] = lhs;
SubExprs[RHS] = rhs;
BinaryOperatorBits.HasFPFeatures = FPFeatures.requiresTrailingStorage();
if (hasStoredFPFeatures())
  setStoredFPFeatures(FPFeatures);
setDependence(computeDependence(this));
4616}

4618BinaryOperator::BinaryOperator(const ASTContext &Ctx, Expr *lhs, Expr *rhs,
                             Opcode opc, QualType ResTy, ExprValueKind VK,
                             ExprObjectKind OK, SourceLocation opLoc,
                             FPOptionsOverride FPFeatures, bool dead2)
  : Expr(CompoundAssignOperatorClass, ResTy, VK, OK) {
BinaryOperatorBits.Opc = opc;
assert(isCompoundAssignmentOp() &&(static_cast <bool> (isCompoundAssignmentOp() &&
 "Use CompoundAssignOperator for compound assignments") ? void
 (0) : __assert_fail ("isCompoundAssignmentOp() && \"Use CompoundAssignOperator for compound assignments\""
, "clang/lib/AST/Expr.cpp", 4625, __extension__ __PRETTY_FUNCTION__
))
       "Use CompoundAssignOperator for compound assignments")(static_cast <bool> (isCompoundAssignmentOp() &&
 "Use CompoundAssignOperator for compound assignments") ? void
 (0) : __assert_fail ("isCompoundAssignmentOp() && \"Use CompoundAssignOperator for compound assignments\""
, "clang/lib/AST/Expr.cpp", 4625, __extension__ __PRETTY_FUNCTION__
));
BinaryOperatorBits.OpLoc = opLoc;
SubExprs[LHS] = lhs;
SubExprs[RHS] = rhs;
BinaryOperatorBits.HasFPFeatures = FPFeatures.requiresTrailingStorage();
if (hasStoredFPFeatures())
  setStoredFPFeatures(FPFeatures);
setDependence(computeDependence(this));
4633}

4635BinaryOperator *BinaryOperator::CreateEmpty(const ASTContext &C,
                                          bool HasFPFeatures) {
unsigned Extra = sizeOfTrailingObjects(HasFPFeatures);
void *Mem =
    C.Allocate(sizeof(BinaryOperator) + Extra, alignof(BinaryOperator));
return new (Mem) BinaryOperator(EmptyShell());
4641}

4643BinaryOperator *BinaryOperator::Create(const ASTContext &C, Expr *lhs,
                                     Expr *rhs, Opcode opc, QualType ResTy,
                                     ExprValueKind VK, ExprObjectKind OK,
                                     SourceLocation opLoc,
                                     FPOptionsOverride FPFeatures) {
bool HasFPFeatures = FPFeatures.requiresTrailingStorage();
unsigned Extra = sizeOfTrailingObjects(HasFPFeatures);
void *Mem =
    C.Allocate(sizeof(BinaryOperator) + Extra, alignof(BinaryOperator));
return new (Mem)
    BinaryOperator(C, lhs, rhs, opc, ResTy, VK, OK, opLoc, FPFeatures);
4654}

4656CompoundAssignOperator *
4657CompoundAssignOperator::CreateEmpty(const ASTContext &C, bool HasFPFeatures) {
unsigned Extra = sizeOfTrailingObjects(HasFPFeatures);
void *Mem = C.Allocate(sizeof(CompoundAssignOperator) + Extra,
                       alignof(CompoundAssignOperator));
return new (Mem) CompoundAssignOperator(C, EmptyShell(), HasFPFeatures);
4662}

4664CompoundAssignOperator *
4665CompoundAssignOperator::Create(const ASTContext &C, Expr *lhs, Expr *rhs,
                             Opcode opc, QualType ResTy, ExprValueKind VK,
                             ExprObjectKind OK, SourceLocation opLoc,
                             FPOptionsOverride FPFeatures,
                             QualType CompLHSType, QualType CompResultType) {
bool HasFPFeatures = FPFeatures.requiresTrailingStorage();
unsigned Extra = sizeOfTrailingObjects(HasFPFeatures);
void *Mem = C.Allocate(sizeof(CompoundAssignOperator) + Extra,
                       alignof(CompoundAssignOperator));
return new (Mem)
    CompoundAssignOperator(C, lhs, rhs, opc, ResTy, VK, OK, opLoc, FPFeatures,
                           CompLHSType, CompResultType);
4677}

4679UnaryOperator *UnaryOperator::CreateEmpty(const ASTContext &C,
                                        bool hasFPFeatures) {
void *Mem = C.Allocate(totalSizeToAlloc<FPOptionsOverride>(hasFPFeatures),
                       alignof(UnaryOperator));
return new (Mem) UnaryOperator(hasFPFeatures, EmptyShell());
4684}

4686UnaryOperator::UnaryOperator(const ASTContext &Ctx, Expr *input, Opcode opc,
                           QualType type, ExprValueKind VK, ExprObjectKind OK,
                           SourceLocation l, bool CanOverflow,
                           FPOptionsOverride FPFeatures)
  : Expr(UnaryOperatorClass, type, VK, OK), Val(input) {
UnaryOperatorBits.Opc = opc;
UnaryOperatorBits.CanOverflow = CanOverflow;
UnaryOperatorBits.Loc = l;
UnaryOperatorBits.HasFPFeatures = FPFeatures.requiresTrailingStorage();
if (hasStoredFPFeatures())
  setStoredFPFeatures(FPFeatures);
setDependence(computeDependence(this, Ctx));
4698}

4700UnaryOperator *UnaryOperator::Create(const ASTContext &C, Expr *input,
                                   Opcode opc, QualType type,
                                   ExprValueKind VK, ExprObjectKind OK,
                                   SourceLocation l, bool CanOverflow,
                                   FPOptionsOverride FPFeatures) {
bool HasFPFeatures = FPFeatures.requiresTrailingStorage();
unsigned Size = totalSizeToAlloc<FPOptionsOverride>(HasFPFeatures);
void *Mem = C.Allocate(Size, alignof(UnaryOperator));
return new (Mem)
    UnaryOperator(C, input, opc, type, VK, OK, l, CanOverflow, FPFeatures);
4710}

4712const OpaqueValueExpr *OpaqueValueExpr::findInCopyConstruct(const Expr *e) {
if (const ExprWithCleanups *ewc = dyn_cast<ExprWithCleanups>(e))
  e = ewc->getSubExpr();
if (const MaterializeTemporaryExpr *m = dyn_cast<MaterializeTemporaryExpr>(e))
  e = m->getSubExpr();
e = cast<CXXConstructExpr>(e)->getArg(0);
while (const ImplicitCastExpr *ice = dyn_cast<ImplicitCastExpr>(e))
  e = ice->getSubExpr();
return cast<OpaqueValueExpr>(e);
4721}

4723PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &Context,
                                         EmptyShell sh,
                                         unsigned numSemanticExprs) {
void *buffer =
    Context.Allocate(totalSizeToAlloc<Expr *>(1 + numSemanticExprs),
                     alignof(PseudoObjectExpr));
return new(buffer) PseudoObjectExpr(sh, numSemanticExprs);
4730}

4732PseudoObjectExpr::PseudoObjectExpr(EmptyShell shell, unsigned numSemanticExprs)
: Expr(PseudoObjectExprClass, shell) {
PseudoObjectExprBits.NumSubExprs = numSemanticExprs + 1;
4735}

4737PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &C, Expr *syntax,
                                         ArrayRef<Expr*> semantics,
                                         unsigned resultIndex) {
assert(syntax && "no syntactic expression!")(static_cast <bool> (syntax && "no syntactic expression!"
) ? void (0) : __assert_fail ("syntax && \"no syntactic expression!\""
, "clang/lib/AST/Expr.cpp", 4740, __extension__ __PRETTY_FUNCTION__
));
assert(semantics.size() && "no semantic expressions!")(static_cast <bool> (semantics.size() && "no semantic expressions!"
) ? void (0) : __assert_fail ("semantics.size() && \"no semantic expressions!\""
, "clang/lib/AST/Expr.cpp", 4741, __extension__ __PRETTY_FUNCTION__
));

QualType type;
ExprValueKind VK;
if (resultIndex == NoResult) {
  type = C.VoidTy;
  VK = VK_PRValue;
} else {
  assert(resultIndex < semantics.size())(static_cast <bool> (resultIndex < semantics.size())
 ? void (0) : __assert_fail ("resultIndex < semantics.size()"
, "clang/lib/AST/Expr.cpp", 4749, __extension__ __PRETTY_FUNCTION__
));
  type = semantics[resultIndex]->getType();
  VK = semantics[resultIndex]->getValueKind();
  assert(semantics[resultIndex]->getObjectKind() == OK_Ordinary)(static_cast <bool> (semantics[resultIndex]->getObjectKind
() == OK_Ordinary) ? void (0) : __assert_fail ("semantics[resultIndex]->getObjectKind() == OK_Ordinary"
, "clang/lib/AST/Expr.cpp", 4752, __extension__ __PRETTY_FUNCTION__
));
}

void *buffer = C.Allocate(totalSizeToAlloc<Expr *>(semantics.size() + 1),
                          alignof(PseudoObjectExpr));
return new(buffer) PseudoObjectExpr(type, VK, syntax, semantics,
                                    resultIndex);
4759}

4761PseudoObjectExpr::PseudoObjectExpr(QualType type, ExprValueKind VK,
                                 Expr *syntax, ArrayRef<Expr *> semantics,
                                 unsigned resultIndex)
  : Expr(PseudoObjectExprClass, type, VK, OK_Ordinary) {
PseudoObjectExprBits.NumSubExprs = semantics.size() + 1;
PseudoObjectExprBits.ResultIndex = resultIndex + 1;

for (unsigned i = 0, e = semantics.size() + 1; i != e; ++i) {
  Expr *E = (i == 0 ? syntax : semantics[i-1]);
  getSubExprsBuffer()[i] = E;

  if (isa<OpaqueValueExpr>(E))
    assert(cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr &&(static_cast <bool> (cast<OpaqueValueExpr>(E)->
getSourceExpr() != nullptr && "opaque-value semantic expressions for pseudo-object "
 "operations must have sources") ? void (0) : __assert_fail (
"cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr && \"opaque-value semantic expressions for pseudo-object \" \"operations must have sources\""
, "clang/lib/AST/Expr.cpp", 4775, __extension__ __PRETTY_FUNCTION__
))
           "opaque-value semantic expressions for pseudo-object "(static_cast <bool> (cast<OpaqueValueExpr>(E)->
getSourceExpr() != nullptr && "opaque-value semantic expressions for pseudo-object "
 "operations must have sources") ? void (0) : __assert_fail (
"cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr && \"opaque-value semantic expressions for pseudo-object \" \"operations must have sources\""
, "clang/lib/AST/Expr.cpp", 4775, __extension__ __PRETTY_FUNCTION__
))
           "operations must have sources")(static_cast <bool> (cast<OpaqueValueExpr>(E)->
getSourceExpr() != nullptr && "opaque-value semantic expressions for pseudo-object "
 "operations must have sources") ? void (0) : __assert_fail (
"cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr && \"opaque-value semantic expressions for pseudo-object \" \"operations must have sources\""
, "clang/lib/AST/Expr.cpp", 4775, __extension__ __PRETTY_FUNCTION__
));
}

setDependence(computeDependence(this));
4779}

4781//===----------------------------------------------------------------------===//
4782//  Child Iterators for iterating over subexpressions/substatements
4783//===----------------------------------------------------------------------===//

4785// UnaryExprOrTypeTraitExpr
4786Stmt::child_range UnaryExprOrTypeTraitExpr::children() {
const_child_range CCR =
    const_cast<const UnaryExprOrTypeTraitExpr *>(this)->children();
return child_range(cast_away_const(CCR.begin()), cast_away_const(CCR.end()));
4790}

4792Stmt::const_child_range UnaryExprOrTypeTraitExpr::children() const {
// If this is of a type and the type is a VLA type (and not a typedef), the
// size expression of the VLA needs to be treated as an executable expression.
// Why isn't this weirdness documented better in StmtIterator?
if (isArgumentType()) {
  if (const VariableArrayType *T =
          dyn_cast<VariableArrayType>(getArgumentType().getTypePtr()))
    return const_child_range(const_child_iterator(T), const_child_iterator());
  return const_child_range(const_child_iterator(), const_child_iterator());
}
return const_child_range(&Argument.Ex, &Argument.Ex + 1);
4803}

4805AtomicExpr::AtomicExpr(SourceLocation BLoc, ArrayRef<Expr *> args, QualType t,
                     AtomicOp op, SourceLocation RP)
  : Expr(AtomicExprClass, t, VK_PRValue, OK_Ordinary),
    NumSubExprs(args.size()), BuiltinLoc(BLoc), RParenLoc(RP), Op(op) {
assert(args.size() == getNumSubExprs(op) && "wrong number of subexpressions")(static_cast <bool> (args.size() == getNumSubExprs(op) &&
 "wrong number of subexpressions") ? void (0) : __assert_fail
 ("args.size() == getNumSubExprs(op) && \"wrong number of subexpressions\""
, "clang/lib/AST/Expr.cpp", 4809, __extension__ __PRETTY_FUNCTION__
));
for (unsigned i = 0; i != args.size(); i++)
  SubExprs[i] = args[i];
setDependence(computeDependence(this));
4813}

4815unsigned AtomicExpr::getNumSubExprs(AtomicOp Op) {
switch (Op) {
case AO__c11_atomic_init:
case AO__opencl_atomic_init:
case AO__c11_atomic_load:
case AO__atomic_load_n:
  return 2;

case AO__opencl_atomic_load:
case AO__hip_atomic_load:
case AO__c11_atomic_store:
case AO__c11_atomic_exchange:
case AO__atomic_load:
case AO__atomic_store:
case AO__atomic_store_n:
case AO__atomic_exchange_n:
case AO__c11_atomic_fetch_add:
case AO__c11_atomic_fetch_sub:
case AO__c11_atomic_fetch_and:
case AO__c11_atomic_fetch_or:
case AO__c11_atomic_fetch_xor:
case AO__c11_atomic_fetch_nand:
case AO__c11_atomic_fetch_max:
case AO__c11_atomic_fetch_min:
case AO__atomic_fetch_add:
case AO__atomic_fetch_sub:
case AO__atomic_fetch_and:
case AO__atomic_fetch_or:
case AO__atomic_fetch_xor:
case AO__atomic_fetch_nand:
case AO__atomic_add_fetch:
case AO__atomic_sub_fetch:
case AO__atomic_and_fetch:
case AO__atomic_or_fetch:
case AO__atomic_xor_fetch:
case AO__atomic_nand_fetch:
case AO__atomic_min_fetch:
case AO__atomic_max_fetch:
case AO__atomic_fetch_min:
case AO__atomic_fetch_max:
  return 3;

case AO__hip_atomic_exchange:
case AO__hip_atomic_fetch_add:
case AO__hip_atomic_fetch_and:
case AO__hip_atomic_fetch_or:
case AO__hip_atomic_fetch_xor:
case AO__hip_atomic_fetch_min:
case AO__hip_atomic_fetch_max:
case AO__opencl_atomic_store:
case AO__hip_atomic_store:
case AO__opencl_atomic_exchange:
case AO__opencl_atomic_fetch_add:
case AO__opencl_atomic_fetch_sub:
case AO__opencl_atomic_fetch_and:
case AO__opencl_atomic_fetch_or:
case AO__opencl_atomic_fetch_xor:
case AO__opencl_atomic_fetch_min:
case AO__opencl_atomic_fetch_max:
case AO__atomic_exchange:
  return 4;

case AO__c11_atomic_compare_exchange_strong:
case AO__c11_atomic_compare_exchange_weak:
  return 5;
case AO__hip_atomic_compare_exchange_strong:
case AO__opencl_atomic_compare_exchange_strong:
case AO__opencl_atomic_compare_exchange_weak:
case AO__hip_atomic_compare_exchange_weak:
case AO__atomic_compare_exchange:
case AO__atomic_compare_exchange_n:
  return 6;
}
llvm_unreachable("unknown atomic op")::llvm::llvm_unreachable_internal("unknown atomic op", "clang/lib/AST/Expr.cpp"
, 4888);
4889}

4891QualType AtomicExpr::getValueType() const {
auto T = getPtr()->getType()->castAs<PointerType>()->getPointeeType();
if (auto AT = T->getAs<AtomicType>())
  return AT->getValueType();
return T;
4896}

4898QualType OMPArraySectionExpr::getBaseOriginalType(const Expr *Base) {
unsigned ArraySectionCount = 0;
while (auto *OASE = dyn_cast<OMPArraySectionExpr>(Base->IgnoreParens())) {
  Base = OASE->getBase();
  ++ArraySectionCount;
}
while (auto *ASE =
           dyn_cast<ArraySubscriptExpr>(Base->IgnoreParenImpCasts())) {
  Base = ASE->getBase();
  ++ArraySectionCount;
}
Base = Base->IgnoreParenImpCasts();
auto OriginalTy = Base->getType();
if (auto *DRE = dyn_cast<DeclRefExpr>(Base))
  if (auto *PVD = dyn_cast<ParmVarDecl>(DRE->getDecl()))
    OriginalTy = PVD->getOriginalType().getNonReferenceType();

for (unsigned Cnt = 0; Cnt < ArraySectionCount; ++Cnt) {
  if (OriginalTy->isAnyPointerType())
    OriginalTy = OriginalTy->getPointeeType();
  else {
    assert (OriginalTy->isArrayType())(static_cast <bool> (OriginalTy->isArrayType()) ? void
 (0) : __assert_fail ("OriginalTy->isArrayType()", "clang/lib/AST/Expr.cpp"
, 4919, __extension__ __PRETTY_FUNCTION__));
    OriginalTy = OriginalTy->castAsArrayTypeUnsafe()->getElementType();
  }
}
return OriginalTy;
4924}

4926RecoveryExpr::RecoveryExpr(ASTContext &Ctx, QualType T, SourceLocation BeginLoc,
                         SourceLocation EndLoc, ArrayRef<Expr *> SubExprs)
  : Expr(RecoveryExprClass, T.getNonReferenceType(),
         T->isDependentType() ? VK_LValue : getValueKindForType(T),
         OK_Ordinary),
    BeginLoc(BeginLoc), EndLoc(EndLoc), NumExprs(SubExprs.size()) {
assert(!T.isNull())(static_cast <bool> (!T.isNull()) ? void (0) : __assert_fail
 ("!T.isNull()", "clang/lib/AST/Expr.cpp", 4932, __extension__
 __PRETTY_FUNCTION__));
assert(!llvm::is_contained(SubExprs, nullptr))(static_cast <bool> (!llvm::is_contained(SubExprs, nullptr
)) ? void (0) : __assert_fail ("!llvm::is_contained(SubExprs, nullptr)"
, "clang/lib/AST/Expr.cpp", 4933, __extension__ __PRETTY_FUNCTION__
));

llvm::copy(SubExprs, getTrailingObjects<Expr *>());
setDependence(computeDependence(this));
4937}

4939RecoveryExpr *RecoveryExpr::Create(ASTContext &Ctx, QualType T,
                                 SourceLocation BeginLoc,
                                 SourceLocation EndLoc,
                                 ArrayRef<Expr *> SubExprs) {
void *Mem = Ctx.Allocate(totalSizeToAlloc<Expr *>(SubExprs.size()),
                         alignof(RecoveryExpr));
return new (Mem) RecoveryExpr(Ctx, T, BeginLoc, EndLoc, SubExprs);
4946}

4948RecoveryExpr *RecoveryExpr::CreateEmpty(ASTContext &Ctx, unsigned NumSubExprs) {
void *Mem = Ctx.Allocate(totalSizeToAlloc<Expr *>(NumSubExprs),
                         alignof(RecoveryExpr));
return new (Mem) RecoveryExpr(EmptyShell(), NumSubExprs);
4952}

4954void OMPArrayShapingExpr::setDimensions(ArrayRef<Expr *> Dims) {
assert((static_cast <bool> (NumDims == Dims.size() && "Preallocated number of dimensions is different from the provided one."
) ? void (0) : __assert_fail ("NumDims == Dims.size() && \"Preallocated number of dimensions is different from the provided one.\""
, "clang/lib/AST/Expr.cpp", 4957, __extension__ __PRETTY_FUNCTION__
))
    NumDims == Dims.size() &&(static_cast <bool> (NumDims == Dims.size() && "Preallocated number of dimensions is different from the provided one."
) ? void (0) : __assert_fail ("NumDims == Dims.size() && \"Preallocated number of dimensions is different from the provided one.\""
, "clang/lib/AST/Expr.cpp", 4957, __extension__ __PRETTY_FUNCTION__
))
    "Preallocated number of dimensions is different from the provided one.")(static_cast <bool> (NumDims == Dims.size() && "Preallocated number of dimensions is different from the provided one."
) ? void (0) : __assert_fail ("NumDims == Dims.size() && \"Preallocated number of dimensions is different from the provided one.\""
, "clang/lib/AST/Expr.cpp", 4957, __extension__ __PRETTY_FUNCTION__
));
llvm::copy(Dims, getTrailingObjects<Expr *>());
4959}

4961void OMPArrayShapingExpr::setBracketsRanges(ArrayRef<SourceRange> BR) {
assert((static_cast <bool> (NumDims == BR.size() && "Preallocated number of dimensions is different from the provided one."
) ? void (0) : __assert_fail ("NumDims == BR.size() && \"Preallocated number of dimensions is different from the provided one.\""
, "clang/lib/AST/Expr.cpp", 4964, __extension__ __PRETTY_FUNCTION__
))
    NumDims == BR.size() &&(static_cast <bool> (NumDims == BR.size() && "Preallocated number of dimensions is different from the provided one."
) ? void (0) : __assert_fail ("NumDims == BR.size() && \"Preallocated number of dimensions is different from the provided one.\""
, "clang/lib/AST/Expr.cpp", 4964, __extension__ __PRETTY_FUNCTION__
))
    "Preallocated number of dimensions is different from the provided one.")(static_cast <bool> (NumDims == BR.size() && "Preallocated number of dimensions is different from the provided one."
) ? void (0) : __assert_fail ("NumDims == BR.size() && \"Preallocated number of dimensions is different from the provided one.\""
, "clang/lib/AST/Expr.cpp", 4964, __extension__ __PRETTY_FUNCTION__
));
llvm::copy(BR, getTrailingObjects<SourceRange>());
4966}

4968OMPArrayShapingExpr::OMPArrayShapingExpr(QualType ExprTy, Expr *Op,
                                       SourceLocation L, SourceLocation R,
                                       ArrayRef<Expr *> Dims)
  : Expr(OMPArrayShapingExprClass, ExprTy, VK_LValue, OK_Ordinary), LPLoc(L),
    RPLoc(R), NumDims(Dims.size()) {
setBase(Op);
setDimensions(Dims);
setDependence(computeDependence(this));
4976}

4978OMPArrayShapingExpr *
4979OMPArrayShapingExpr::Create(const ASTContext &Context, QualType T, Expr *Op,
                          SourceLocation L, SourceLocation R,
                          ArrayRef<Expr *> Dims,
                          ArrayRef<SourceRange> BracketRanges) {
assert(Dims.size() == BracketRanges.size() &&(static_cast <bool> (Dims.size() == BracketRanges.size(
) && "Different number of dimensions and brackets ranges."
) ? void (0) : __assert_fail ("Dims.size() == BracketRanges.size() && \"Different number of dimensions and brackets ranges.\""
, "clang/lib/AST/Expr.cpp", 4984, __extension__ __PRETTY_FUNCTION__
))
       "Different number of dimensions and brackets ranges.")(static_cast <bool> (Dims.size() == BracketRanges.size(
) && "Different number of dimensions and brackets ranges."
) ? void (0) : __assert_fail ("Dims.size() == BracketRanges.size() && \"Different number of dimensions and brackets ranges.\""
, "clang/lib/AST/Expr.cpp", 4984, __extension__ __PRETTY_FUNCTION__
));
void *Mem = Context.Allocate(
    totalSizeToAlloc<Expr *, SourceRange>(Dims.size() + 1, Dims.size()),
    alignof(OMPArrayShapingExpr));
auto *E = new (Mem) OMPArrayShapingExpr(T, Op, L, R, Dims);
E->setBracketsRanges(BracketRanges);
return E;
4991}

4993OMPArrayShapingExpr *OMPArrayShapingExpr::CreateEmpty(const ASTContext &Context,
                                                    unsigned NumDims) {
void *Mem = Context.Allocate(
    totalSizeToAlloc<Expr *, SourceRange>(NumDims + 1, NumDims),
    alignof(OMPArrayShapingExpr));
return new (Mem) OMPArrayShapingExpr(EmptyShell(), NumDims);
4999}

5001void OMPIteratorExpr::setIteratorDeclaration(unsigned I, Decl *D) {
assert(I < NumIterators &&(static_cast <bool> (I < NumIterators && "Idx is greater or equal the number of iterators definitions."
) ? void (0) : __assert_fail ("I < NumIterators && \"Idx is greater or equal the number of iterators definitions.\""
, "clang/lib/AST/Expr.cpp", 5003, __extension__ __PRETTY_FUNCTION__
))
       "Idx is greater or equal the number of iterators definitions.")(static_cast <bool> (I < NumIterators && "Idx is greater or equal the number of iterators definitions."
) ? void (0) : __assert_fail ("I < NumIterators && \"Idx is greater or equal the number of iterators definitions.\""
, "clang/lib/AST/Expr.cpp", 5003, __extension__ __PRETTY_FUNCTION__
));
getTrailingObjects<Decl *>()[I] = D;
5005}

5007void OMPIteratorExpr::setAssignmentLoc(unsigned I, SourceLocation Loc) {
assert(I < NumIterators &&(static_cast <bool> (I < NumIterators && "Idx is greater or equal the number of iterators definitions."
) ? void (0) : __assert_fail ("I < NumIterators && \"Idx is greater or equal the number of iterators definitions.\""
, "clang/lib/AST/Expr.cpp", 5009, __extension__ __PRETTY_FUNCTION__
))
       "Idx is greater or equal the number of iterators definitions.")(static_cast <bool> (I < NumIterators && "Idx is greater or equal the number of iterators definitions."
) ? void (0) : __assert_fail ("I < NumIterators && \"Idx is greater or equal the number of iterators definitions.\""
, "clang/lib/AST/Expr.cpp", 5009, __extension__ __PRETTY_FUNCTION__
));
getTrailingObjects<
    SourceLocation>()[I * static_cast<int>(RangeLocOffset::Total) +
                      static_cast<int>(RangeLocOffset::AssignLoc)] = Loc;
5013}

5015void OMPIteratorExpr::setIteratorRange(unsigned I, Expr *Begin,
                                     SourceLocation ColonLoc, Expr *End,
                                     SourceLocation SecondColonLoc,
                                     Expr *Step) {
assert(I < NumIterators &&(static_cast <bool> (I < NumIterators && "Idx is greater or equal the number of iterators definitions."
) ? void (0) : __assert_fail ("I < NumIterators && \"Idx is greater or equal the number of iterators definitions.\""
, "clang/lib/AST/Expr.cpp", 5020, __extension__ __PRETTY_FUNCTION__
))
       "Idx is greater or equal the number of iterators definitions.")(static_cast <bool> (I < NumIterators && "Idx is greater or equal the number of iterators definitions."
) ? void (0) : __assert_fail ("I < NumIterators && \"Idx is greater or equal the number of iterators definitions.\""
, "clang/lib/AST/Expr.cpp", 5020, __extension__ __PRETTY_FUNCTION__
));
getTrailingObjects<Expr *>()[I * static_cast<int>(RangeExprOffset::Total) +
                             static_cast<int>(RangeExprOffset::Begin)] =
    Begin;
getTrailingObjects<Expr *>()[I * static_cast<int>(RangeExprOffset::Total) +
                             static_cast<int>(RangeExprOffset::End)] = End;
getTrailingObjects<Expr *>()[I * static_cast<int>(RangeExprOffset::Total) +
                             static_cast<int>(RangeExprOffset::Step)] = Step;
getTrailingObjects<
    SourceLocation>()[I * static_cast<int>(RangeLocOffset::Total) +
                      static_cast<int>(RangeLocOffset::FirstColonLoc)] =
    ColonLoc;
getTrailingObjects<
    SourceLocation>()[I * static_cast<int>(RangeLocOffset::Total) +
                      static_cast<int>(RangeLocOffset::SecondColonLoc)] =
    SecondColonLoc;
5036}

5038Decl *OMPIteratorExpr::getIteratorDecl(unsigned I) {
return getTrailingObjects<Decl *>()[I];
5040}

5042OMPIteratorExpr::IteratorRange OMPIteratorExpr::getIteratorRange(unsigned I) {
IteratorRange Res;
Res.Begin =
    getTrailingObjects<Expr *>()[I * static_cast<int>(
                                         RangeExprOffset::Total) +
                                 static_cast<int>(RangeExprOffset::Begin)];
Res.End =
    getTrailingObjects<Expr *>()[I * static_cast<int>(
                                         RangeExprOffset::Total) +
                                 static_cast<int>(RangeExprOffset::End)];
Res.Step =
    getTrailingObjects<Expr *>()[I * static_cast<int>(
                                         RangeExprOffset::Total) +
                                 static_cast<int>(RangeExprOffset::Step)];
return Res;
5057}

5059SourceLocation OMPIteratorExpr::getAssignLoc(unsigned I) const {
return getTrailingObjects<
    SourceLocation>()[I * static_cast<int>(RangeLocOffset::Total) +
                      static_cast<int>(RangeLocOffset::AssignLoc)];
5063}

5065SourceLocation OMPIteratorExpr::getColonLoc(unsigned I) const {
return getTrailingObjects<
    SourceLocation>()[I * static_cast<int>(RangeLocOffset::Total) +
                      static_cast<int>(RangeLocOffset::FirstColonLoc)];
5069}

5071SourceLocation OMPIteratorExpr::getSecondColonLoc(unsigned I) const {
return getTrailingObjects<
    SourceLocation>()[I * static_cast<int>(RangeLocOffset::Total) +
                      static_cast<int>(RangeLocOffset::SecondColonLoc)];
5075}

5077void OMPIteratorExpr::setHelper(unsigned I, const OMPIteratorHelperData &D) {
getTrailingObjects<OMPIteratorHelperData>()[I] = D;
5079}

5081OMPIteratorHelperData &OMPIteratorExpr::getHelper(unsigned I) {
return getTrailingObjects<OMPIteratorHelperData>()[I];
5083}

5085const OMPIteratorHelperData &OMPIteratorExpr::getHelper(unsigned I) const {
return getTrailingObjects<OMPIteratorHelperData>()[I];
5087}

5089OMPIteratorExpr::OMPIteratorExpr(
  QualType ExprTy, SourceLocation IteratorKwLoc, SourceLocation L,
  SourceLocation R, ArrayRef<OMPIteratorExpr::IteratorDefinition> Data,
  ArrayRef<OMPIteratorHelperData> Helpers)
  : Expr(OMPIteratorExprClass, ExprTy, VK_LValue, OK_Ordinary),
    IteratorKwLoc(IteratorKwLoc), LPLoc(L), RPLoc(R),
    NumIterators(Data.size()) {
for (unsigned I = 0, E = Data.size(); I < E; ++I) {
  const IteratorDefinition &D = Data[I];
  setIteratorDeclaration(I, D.IteratorDecl);
  setAssignmentLoc(I, D.AssignmentLoc);
  setIteratorRange(I, D.Range.Begin, D.ColonLoc, D.Range.End,
                   D.SecondColonLoc, D.Range.Step);
  setHelper(I, Helpers[I]);
}
setDependence(computeDependence(this));
5105}

5107OMPIteratorExpr *
5108OMPIteratorExpr::Create(const ASTContext &Context, QualType T,
                      SourceLocation IteratorKwLoc, SourceLocation L,
                      SourceLocation R,
                      ArrayRef<OMPIteratorExpr::IteratorDefinition> Data,
                      ArrayRef<OMPIteratorHelperData> Helpers) {
assert(Data.size() == Helpers.size() &&(static_cast <bool> (Data.size() == Helpers.size() &&
 "Data and helpers must have the same size.") ? void (0) : __assert_fail
 ("Data.size() == Helpers.size() && \"Data and helpers must have the same size.\""
, "clang/lib/AST/Expr.cpp", 5114, __extension__ __PRETTY_FUNCTION__
))
       "Data and helpers must have the same size.")(static_cast <bool> (Data.size() == Helpers.size() &&
 "Data and helpers must have the same size.") ? void (0) : __assert_fail
 ("Data.size() == Helpers.size() && \"Data and helpers must have the same size.\""
, "clang/lib/AST/Expr.cpp", 5114, __extension__ __PRETTY_FUNCTION__
));
void *Mem = Context.Allocate(
    totalSizeToAlloc<Decl *, Expr *, SourceLocation, OMPIteratorHelperData>(
        Data.size(), Data.size() * static_cast<int>(RangeExprOffset::Total),
        Data.size() * static_cast<int>(RangeLocOffset::Total),
        Helpers.size()),
    alignof(OMPIteratorExpr));
return new (Mem) OMPIteratorExpr(T, IteratorKwLoc, L, R, Data, Helpers);
5122}

5124OMPIteratorExpr *OMPIteratorExpr::CreateEmpty(const ASTContext &Context,
                                            unsigned NumIterators) {
void *Mem = Context.Allocate(
    totalSizeToAlloc<Decl *, Expr *, SourceLocation, OMPIteratorHelperData>(
        NumIterators, NumIterators * static_cast<int>(RangeExprOffset::Total),
        NumIterators * static_cast<int>(RangeLocOffset::Total), NumIterators),
    alignof(OMPIteratorExpr));
return new (Mem) OMPIteratorExpr(EmptyShell(), NumIterators);
5132}