/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp

Bug Summary

File:	clang/lib/CodeGen/CGExprCXX.cpp
Warning:	line 133, column 19 Called C++ object pointer is null

Annotated Source Code

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clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name CGExprCXX.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mthread-model posix -mframe-pointer=none -relaxed-aliasing -fmath-errno -fno-rounding-math -masm-verbose -mconstructor-aliases -munwind-tables -target-cpu x86-64 -dwarf-column-info -fno-split-dwarf-inlining -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-10/lib/clang/10.0.0 -D CLANG_VENDOR="Debian " -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/build-llvm/tools/clang/lib/CodeGen -I /build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen -I /build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include -I /build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/build-llvm/include -I /build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/llvm/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-10/lib/clang/10.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/build-llvm/tools/clang/lib/CodeGen -fdebug-prefix-map=/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814=. -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -o /tmp/scan-build-2020-01-11-115256-23437-1 -x c++ /build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp

/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp

→

1//===--- CGExprCXX.cpp - Emit LLVM Code for C++ expressions ---------------===//
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 contains code dealing with code generation of C++ expressions
10//
11//===----------------------------------------------------------------------===//

13#include "CGCUDARuntime.h"
14#include "CGCXXABI.h"
15#include "CGDebugInfo.h"
16#include "CGObjCRuntime.h"
17#include "CodeGenFunction.h"
18#include "ConstantEmitter.h"
19#include "TargetInfo.h"
20#include "clang/Basic/CodeGenOptions.h"
21#include "clang/CodeGen/CGFunctionInfo.h"
22#include "llvm/IR/Intrinsics.h"

24using namespace clang;
25using namespace CodeGen;

27namespace {
28struct MemberCallInfo {
RequiredArgs ReqArgs;
// Number of prefix arguments for the call. Ignores the `this` pointer.
unsigned PrefixSize;
32};
33}

35static MemberCallInfo
36commonEmitCXXMemberOrOperatorCall(CodeGenFunction &CGF, const CXXMethodDecl *MD,
                                llvm::Value *This, llvm::Value *ImplicitParam,
                                QualType ImplicitParamTy, const CallExpr *CE,
                                CallArgList &Args, CallArgList *RtlArgs) {
assert(CE == nullptr || isa<CXXMemberCallExpr>(CE) ||((CE == nullptr || isa<CXXMemberCallExpr>(CE) || isa<
CXXOperatorCallExpr>(CE)) ? static_cast<void> (0) : __assert_fail
 ("CE == nullptr || isa<CXXMemberCallExpr>(CE) || isa<CXXOperatorCallExpr>(CE)"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 41, __PRETTY_FUNCTION__))
       isa<CXXOperatorCallExpr>(CE))((CE == nullptr || isa<CXXMemberCallExpr>(CE) || isa<
CXXOperatorCallExpr>(CE)) ? static_cast<void> (0) : __assert_fail
 ("CE == nullptr || isa<CXXMemberCallExpr>(CE) || isa<CXXOperatorCallExpr>(CE)"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 41, __PRETTY_FUNCTION__));
assert(MD->isInstance() &&((MD->isInstance() && "Trying to emit a member or operator call expr on a static method!"
) ? static_cast<void> (0) : __assert_fail ("MD->isInstance() && \"Trying to emit a member or operator call expr on a static method!\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 43, __PRETTY_FUNCTION__))
       "Trying to emit a member or operator call expr on a static method!")((MD->isInstance() && "Trying to emit a member or operator call expr on a static method!"
) ? static_cast<void> (0) : __assert_fail ("MD->isInstance() && \"Trying to emit a member or operator call expr on a static method!\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 43, __PRETTY_FUNCTION__));

// Push the this ptr.
const CXXRecordDecl *RD =
    CGF.CGM.getCXXABI().getThisArgumentTypeForMethod(MD);
Args.add(RValue::get(This), CGF.getTypes().DeriveThisType(RD, MD));

// If there is an implicit parameter (e.g. VTT), emit it.
if (ImplicitParam) {
  Args.add(RValue::get(ImplicitParam), ImplicitParamTy);
}

const FunctionProtoType *FPT = MD->getType()->castAs<FunctionProtoType>();
RequiredArgs required = RequiredArgs::forPrototypePlus(FPT, Args.size());
unsigned PrefixSize = Args.size() - 1;

// And the rest of the call args.
if (RtlArgs) {
  // Special case: if the caller emitted the arguments right-to-left already
  // (prior to emitting the *this argument), we're done. This happens for
  // assignment operators.
  Args.addFrom(*RtlArgs);
} else if (CE) {
  // Special case: skip first argument of CXXOperatorCall (it is "this").
  unsigned ArgsToSkip = isa<CXXOperatorCallExpr>(CE) ? 1 : 0;
  CGF.EmitCallArgs(Args, FPT, drop_begin(CE->arguments(), ArgsToSkip),
                   CE->getDirectCallee());
} else {
  assert(((FPT->getNumParams() == 0 && "No CallExpr specified for function with non-zero number of arguments"
) ? static_cast<void> (0) : __assert_fail ("FPT->getNumParams() == 0 && \"No CallExpr specified for function with non-zero number of arguments\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 73, __PRETTY_FUNCTION__))
      FPT->getNumParams() == 0 &&((FPT->getNumParams() == 0 && "No CallExpr specified for function with non-zero number of arguments"
) ? static_cast<void> (0) : __assert_fail ("FPT->getNumParams() == 0 && \"No CallExpr specified for function with non-zero number of arguments\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 73, __PRETTY_FUNCTION__))
      "No CallExpr specified for function with non-zero number of arguments")((FPT->getNumParams() == 0 && "No CallExpr specified for function with non-zero number of arguments"
) ? static_cast<void> (0) : __assert_fail ("FPT->getNumParams() == 0 && \"No CallExpr specified for function with non-zero number of arguments\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 73, __PRETTY_FUNCTION__));
}
return {required, PrefixSize};
76}

78RValue CodeGenFunction::EmitCXXMemberOrOperatorCall(
  const CXXMethodDecl *MD, const CGCallee &Callee,
  ReturnValueSlot ReturnValue,
  llvm::Value *This, llvm::Value *ImplicitParam, QualType ImplicitParamTy,
  const CallExpr *CE, CallArgList *RtlArgs) {
const FunctionProtoType *FPT = MD->getType()->castAs<FunctionProtoType>();
CallArgList Args;
MemberCallInfo CallInfo = commonEmitCXXMemberOrOperatorCall(
    *this, MD, This, ImplicitParam, ImplicitParamTy, CE, Args, RtlArgs);
auto &FnInfo = CGM.getTypes().arrangeCXXMethodCall(
    Args, FPT, CallInfo.ReqArgs, CallInfo.PrefixSize);
return EmitCall(FnInfo, Callee, ReturnValue, Args, nullptr,
                CE ? CE->getExprLoc() : SourceLocation());
91}

93RValue CodeGenFunction::EmitCXXDestructorCall(
  GlobalDecl Dtor, const CGCallee &Callee, llvm::Value *This, QualType ThisTy,
  llvm::Value *ImplicitParam, QualType ImplicitParamTy, const CallExpr *CE) {
const CXXMethodDecl *DtorDecl = cast<CXXMethodDecl>(Dtor.getDecl());

assert(!ThisTy.isNull())((!ThisTy.isNull()) ? static_cast<void> (0) : __assert_fail
 ("!ThisTy.isNull()", "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 98, __PRETTY_FUNCTION__));
assert(ThisTy->getAsCXXRecordDecl() == DtorDecl->getParent() &&((ThisTy->getAsCXXRecordDecl() == DtorDecl->getParent()
 && "Pointer/Object mixup") ? static_cast<void>
 (0) : __assert_fail ("ThisTy->getAsCXXRecordDecl() == DtorDecl->getParent() && \"Pointer/Object mixup\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 100, __PRETTY_FUNCTION__))
       "Pointer/Object mixup")((ThisTy->getAsCXXRecordDecl() == DtorDecl->getParent()
 && "Pointer/Object mixup") ? static_cast<void>
 (0) : __assert_fail ("ThisTy->getAsCXXRecordDecl() == DtorDecl->getParent() && \"Pointer/Object mixup\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 100, __PRETTY_FUNCTION__));

LangAS SrcAS = ThisTy.getAddressSpace();
LangAS DstAS = DtorDecl->getMethodQualifiers().getAddressSpace();
if (SrcAS != DstAS) {
  QualType DstTy = DtorDecl->getThisType();
  llvm::Type *NewType = CGM.getTypes().ConvertType(DstTy);
  This = getTargetHooks().performAddrSpaceCast(*this, This, SrcAS, DstAS,
                                               NewType);
}

CallArgList Args;
commonEmitCXXMemberOrOperatorCall(*this, DtorDecl, This, ImplicitParam,
                                  ImplicitParamTy, CE, Args, nullptr);
return EmitCall(CGM.getTypes().arrangeCXXStructorDeclaration(Dtor), Callee,
                ReturnValueSlot(), Args);
116}

118RValue CodeGenFunction::EmitCXXPseudoDestructorExpr(
                                          const CXXPseudoDestructorExpr *E) {
QualType DestroyedType = E->getDestroyedType();
if (DestroyedType.hasStrongOrWeakObjCLifetime()) {
1
Calling 'QualType::hasStrongOrWeakObjCLifetime'→
7
←
Returning from 'QualType::hasStrongOrWeakObjCLifetime'→
8
←
Taking true branch→
  // Automatic Reference Counting:
  //   If the pseudo-expression names a retainable object with weak or
  //   strong lifetime, the object shall be released.
  Expr *BaseExpr = E->getBase();
  Address BaseValue = Address::invalid();
  Qualifiers BaseQuals;

  // If this is s.x, emit s as an lvalue. If it is s->x, emit s as a scalar.
  if (E->isArrow()) {
9
←
Assuming the condition is true→
10
←
Taking true branch→
    BaseValue = EmitPointerWithAlignment(BaseExpr);
    const PointerType *PTy = BaseExpr->getType()->getAs<PointerType>();
11
←
Assuming the object is not a 'PointerType'→
12
←
'PTy' initialized to a null pointer value→
    BaseQuals = PTy->getPointeeType().getQualifiers();
13
←
Called C++ object pointer is null
  } else {
    LValue BaseLV = EmitLValue(BaseExpr);
    BaseValue = BaseLV.getAddress(*this);
    QualType BaseTy = BaseExpr->getType();
    BaseQuals = BaseTy.getQualifiers();
  }

  switch (DestroyedType.getObjCLifetime()) {
  case Qualifiers::OCL_None:
  case Qualifiers::OCL_ExplicitNone:
  case Qualifiers::OCL_Autoreleasing:
    break;

  case Qualifiers::OCL_Strong:
    EmitARCRelease(Builder.CreateLoad(BaseValue,
                      DestroyedType.isVolatileQualified()),
                   ARCPreciseLifetime);
    break;

  case Qualifiers::OCL_Weak:
    EmitARCDestroyWeak(BaseValue);
    break;
  }
} else {
  // C++ [expr.pseudo]p1:
  //   The result shall only be used as the operand for the function call
  //   operator (), and the result of such a call has type void. The only
  //   effect is the evaluation of the postfix-expression before the dot or
  //   arrow.
  EmitIgnoredExpr(E->getBase());
}

return RValue::get(nullptr);
167}

169static CXXRecordDecl *getCXXRecord(const Expr *E) {
QualType T = E->getType();
if (const PointerType *PTy = T->getAs<PointerType>())
  T = PTy->getPointeeType();
const RecordType *Ty = T->castAs<RecordType>();
return cast<CXXRecordDecl>(Ty->getDecl());
175}

177// Note: This function also emit constructor calls to support a MSVC
178// extensions allowing explicit constructor function call.
179RValue CodeGenFunction::EmitCXXMemberCallExpr(const CXXMemberCallExpr *CE,
                                            ReturnValueSlot ReturnValue) {
const Expr *callee = CE->getCallee()->IgnoreParens();

if (isa<BinaryOperator>(callee))
  return EmitCXXMemberPointerCallExpr(CE, ReturnValue);

const MemberExpr *ME = cast<MemberExpr>(callee);
const CXXMethodDecl *MD = cast<CXXMethodDecl>(ME->getMemberDecl());

if (MD->isStatic()) {
  // The method is static, emit it as we would a regular call.
  CGCallee callee =
      CGCallee::forDirect(CGM.GetAddrOfFunction(MD), GlobalDecl(MD));
  return EmitCall(getContext().getPointerType(MD->getType()), callee, CE,
                  ReturnValue);
}

bool HasQualifier = ME->hasQualifier();
NestedNameSpecifier *Qualifier = HasQualifier ? ME->getQualifier() : nullptr;
bool IsArrow = ME->isArrow();
const Expr *Base = ME->getBase();

return EmitCXXMemberOrOperatorMemberCallExpr(
    CE, MD, ReturnValue, HasQualifier, Qualifier, IsArrow, Base);
204}

206RValue CodeGenFunction::EmitCXXMemberOrOperatorMemberCallExpr(
  const CallExpr *CE, const CXXMethodDecl *MD, ReturnValueSlot ReturnValue,
  bool HasQualifier, NestedNameSpecifier *Qualifier, bool IsArrow,
  const Expr *Base) {
assert(isa<CXXMemberCallExpr>(CE) || isa<CXXOperatorCallExpr>(CE))((isa<CXXMemberCallExpr>(CE) || isa<CXXOperatorCallExpr
>(CE)) ? static_cast<void> (0) : __assert_fail ("isa<CXXMemberCallExpr>(CE) || isa<CXXOperatorCallExpr>(CE)"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 210, __PRETTY_FUNCTION__));

// Compute the object pointer.
bool CanUseVirtualCall = MD->isVirtual() && !HasQualifier;

const CXXMethodDecl *DevirtualizedMethod = nullptr;
if (CanUseVirtualCall &&
    MD->getDevirtualizedMethod(Base, getLangOpts().AppleKext)) {
  const CXXRecordDecl *BestDynamicDecl = Base->getBestDynamicClassType();
  DevirtualizedMethod = MD->getCorrespondingMethodInClass(BestDynamicDecl);
  assert(DevirtualizedMethod)((DevirtualizedMethod) ? static_cast<void> (0) : __assert_fail
 ("DevirtualizedMethod", "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 220, __PRETTY_FUNCTION__));
  const CXXRecordDecl *DevirtualizedClass = DevirtualizedMethod->getParent();
  const Expr *Inner = Base->ignoreParenBaseCasts();
  if (DevirtualizedMethod->getReturnType().getCanonicalType() !=
      MD->getReturnType().getCanonicalType())
    // If the return types are not the same, this might be a case where more
    // code needs to run to compensate for it. For example, the derived
    // method might return a type that inherits form from the return
    // type of MD and has a prefix.
    // For now we just avoid devirtualizing these covariant cases.
    DevirtualizedMethod = nullptr;
  else if (getCXXRecord(Inner) == DevirtualizedClass)
    // If the class of the Inner expression is where the dynamic method
    // is defined, build the this pointer from it.
    Base = Inner;
  else if (getCXXRecord(Base) != DevirtualizedClass) {
    // If the method is defined in a class that is not the best dynamic
    // one or the one of the full expression, we would have to build
    // a derived-to-base cast to compute the correct this pointer, but
    // we don't have support for that yet, so do a virtual call.
    DevirtualizedMethod = nullptr;
  }
}

bool TrivialForCodegen =
    MD->isTrivial() || (MD->isDefaulted() && MD->getParent()->isUnion());
bool TrivialAssignment =
    TrivialForCodegen &&
    (MD->isCopyAssignmentOperator() || MD->isMoveAssignmentOperator()) &&
    !MD->getParent()->mayInsertExtraPadding();

// C++17 demands that we evaluate the RHS of a (possibly-compound) assignment
// operator before the LHS.
CallArgList RtlArgStorage;
CallArgList *RtlArgs = nullptr;
LValue TrivialAssignmentRHS;
if (auto *OCE = dyn_cast<CXXOperatorCallExpr>(CE)) {
  if (OCE->isAssignmentOp()) {
    if (TrivialAssignment) {
      TrivialAssignmentRHS = EmitLValue(CE->getArg(1));
    } else {
      RtlArgs = &RtlArgStorage;
      EmitCallArgs(*RtlArgs, MD->getType()->castAs<FunctionProtoType>(),
                   drop_begin(CE->arguments(), 1), CE->getDirectCallee(),
                   /*ParamsToSkip*/0, EvaluationOrder::ForceRightToLeft);
    }
  }
}

LValue This;
if (IsArrow) {
  LValueBaseInfo BaseInfo;
  TBAAAccessInfo TBAAInfo;
  Address ThisValue = EmitPointerWithAlignment(Base, &BaseInfo, &TBAAInfo);
  This = MakeAddrLValue(ThisValue, Base->getType(), BaseInfo, TBAAInfo);
} else {
  This = EmitLValue(Base);
}

if (const CXXConstructorDecl *Ctor = dyn_cast<CXXConstructorDecl>(MD)) {
  // This is the MSVC p->Ctor::Ctor(...) extension. We assume that's
  // constructing a new complete object of type Ctor.
  assert(!RtlArgs)((!RtlArgs) ? static_cast<void> (0) : __assert_fail ("!RtlArgs"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 282, __PRETTY_FUNCTION__));
  assert(ReturnValue.isNull() && "Constructor shouldn't have return value")((ReturnValue.isNull() && "Constructor shouldn't have return value"
) ? static_cast<void> (0) : __assert_fail ("ReturnValue.isNull() && \"Constructor shouldn't have return value\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 283, __PRETTY_FUNCTION__));
  CallArgList Args;
  commonEmitCXXMemberOrOperatorCall(
      *this, Ctor, This.getPointer(*this), /*ImplicitParam=*/nullptr,
      /*ImplicitParamTy=*/QualType(), CE, Args, nullptr);

  EmitCXXConstructorCall(Ctor, Ctor_Complete, /*ForVirtualBase=*/false,
                         /*Delegating=*/false, This.getAddress(*this), Args,
                         AggValueSlot::DoesNotOverlap, CE->getExprLoc(),
                         /*NewPointerIsChecked=*/false);
  return RValue::get(nullptr);
}

if (TrivialForCodegen) {
  if (isa<CXXDestructorDecl>(MD))
    return RValue::get(nullptr);

  if (TrivialAssignment) {
    // We don't like to generate the trivial copy/move assignment operator
    // when it isn't necessary; just produce the proper effect here.
    // It's important that we use the result of EmitLValue here rather than
    // emitting call arguments, in order to preserve TBAA information from
    // the RHS.
    LValue RHS = isa<CXXOperatorCallExpr>(CE)
                     ? TrivialAssignmentRHS
                     : EmitLValue(*CE->arg_begin());
    EmitAggregateAssign(This, RHS, CE->getType());
    return RValue::get(This.getPointer(*this));
  }

  assert(MD->getParent()->mayInsertExtraPadding() &&((MD->getParent()->mayInsertExtraPadding() && "unknown trivial member function"
) ? static_cast<void> (0) : __assert_fail ("MD->getParent()->mayInsertExtraPadding() && \"unknown trivial member function\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 314, __PRETTY_FUNCTION__))
         "unknown trivial member function")((MD->getParent()->mayInsertExtraPadding() && "unknown trivial member function"
) ? static_cast<void> (0) : __assert_fail ("MD->getParent()->mayInsertExtraPadding() && \"unknown trivial member function\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 314, __PRETTY_FUNCTION__));
}

// Compute the function type we're calling.
const CXXMethodDecl *CalleeDecl =
    DevirtualizedMethod ? DevirtualizedMethod : MD;
const CGFunctionInfo *FInfo = nullptr;
if (const auto *Dtor = dyn_cast<CXXDestructorDecl>(CalleeDecl))
  FInfo = &CGM.getTypes().arrangeCXXStructorDeclaration(
      GlobalDecl(Dtor, Dtor_Complete));
else
  FInfo = &CGM.getTypes().arrangeCXXMethodDeclaration(CalleeDecl);

llvm::FunctionType *Ty = CGM.getTypes().GetFunctionType(*FInfo);

// C++11 [class.mfct.non-static]p2:
//   If a non-static member function of a class X is called for an object that
//   is not of type X, or of a type derived from X, the behavior is undefined.
SourceLocation CallLoc;
ASTContext &C = getContext();
if (CE)
  CallLoc = CE->getExprLoc();

SanitizerSet SkippedChecks;
if (const auto *CMCE = dyn_cast<CXXMemberCallExpr>(CE)) {
  auto *IOA = CMCE->getImplicitObjectArgument();
  bool IsImplicitObjectCXXThis = IsWrappedCXXThis(IOA);
  if (IsImplicitObjectCXXThis)
    SkippedChecks.set(SanitizerKind::Alignment, true);
  if (IsImplicitObjectCXXThis || isa<DeclRefExpr>(IOA))
    SkippedChecks.set(SanitizerKind::Null, true);
}
EmitTypeCheck(CodeGenFunction::TCK_MemberCall, CallLoc,
              This.getPointer(*this),
              C.getRecordType(CalleeDecl->getParent()),
              /*Alignment=*/CharUnits::Zero(), SkippedChecks);

// C++ [class.virtual]p12:
//   Explicit qualification with the scope operator (5.1) suppresses the
//   virtual call mechanism.
//
// We also don't emit a virtual call if the base expression has a record type
// because then we know what the type is.
bool UseVirtualCall = CanUseVirtualCall && !DevirtualizedMethod;

if (const CXXDestructorDecl *Dtor = dyn_cast<CXXDestructorDecl>(CalleeDecl)) {
  assert(CE->arg_begin() == CE->arg_end() &&((CE->arg_begin() == CE->arg_end() && "Destructor shouldn't have explicit parameters"
) ? static_cast<void> (0) : __assert_fail ("CE->arg_begin() == CE->arg_end() && \"Destructor shouldn't have explicit parameters\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 361, __PRETTY_FUNCTION__))
         "Destructor shouldn't have explicit parameters")((CE->arg_begin() == CE->arg_end() && "Destructor shouldn't have explicit parameters"
) ? static_cast<void> (0) : __assert_fail ("CE->arg_begin() == CE->arg_end() && \"Destructor shouldn't have explicit parameters\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 361, __PRETTY_FUNCTION__));
  assert(ReturnValue.isNull() && "Destructor shouldn't have return value")((ReturnValue.isNull() && "Destructor shouldn't have return value"
) ? static_cast<void> (0) : __assert_fail ("ReturnValue.isNull() && \"Destructor shouldn't have return value\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 362, __PRETTY_FUNCTION__));
  if (UseVirtualCall) {
    CGM.getCXXABI().EmitVirtualDestructorCall(*this, Dtor, Dtor_Complete,
                                              This.getAddress(*this),
                                              cast<CXXMemberCallExpr>(CE));
  } else {
    GlobalDecl GD(Dtor, Dtor_Complete);
    CGCallee Callee;
    if (getLangOpts().AppleKext && Dtor->isVirtual() && HasQualifier)
      Callee = BuildAppleKextVirtualCall(Dtor, Qualifier, Ty);
    else if (!DevirtualizedMethod)
      Callee =
          CGCallee::forDirect(CGM.getAddrOfCXXStructor(GD, FInfo, Ty), GD);
    else {
      Callee = CGCallee::forDirect(CGM.GetAddrOfFunction(GD, Ty), GD);
    }

    QualType ThisTy =
        IsArrow ? Base->getType()->getPointeeType() : Base->getType();
    EmitCXXDestructorCall(GD, Callee, This.getPointer(*this), ThisTy,
                          /*ImplicitParam=*/nullptr,
                          /*ImplicitParamTy=*/QualType(), nullptr);
  }
  return RValue::get(nullptr);
}

// FIXME: Uses of 'MD' past this point need to be audited. We may need to use
// 'CalleeDecl' instead.

CGCallee Callee;
if (UseVirtualCall) {
  Callee = CGCallee::forVirtual(CE, MD, This.getAddress(*this), Ty);
} else {
  if (SanOpts.has(SanitizerKind::CFINVCall) &&
      MD->getParent()->isDynamicClass()) {
    llvm::Value *VTable;
    const CXXRecordDecl *RD;
    std::tie(VTable, RD) = CGM.getCXXABI().LoadVTablePtr(
        *this, This.getAddress(*this), CalleeDecl->getParent());
    EmitVTablePtrCheckForCall(RD, VTable, CFITCK_NVCall, CE->getBeginLoc());
  }

  if (getLangOpts().AppleKext && MD->isVirtual() && HasQualifier)
    Callee = BuildAppleKextVirtualCall(MD, Qualifier, Ty);
  else if (!DevirtualizedMethod)
    Callee =
        CGCallee::forDirect(CGM.GetAddrOfFunction(MD, Ty), GlobalDecl(MD));
  else {
    Callee =
        CGCallee::forDirect(CGM.GetAddrOfFunction(DevirtualizedMethod, Ty),
                            GlobalDecl(DevirtualizedMethod));
  }
}

if (MD->isVirtual()) {
  Address NewThisAddr =
      CGM.getCXXABI().adjustThisArgumentForVirtualFunctionCall(
          *this, CalleeDecl, This.getAddress(*this), UseVirtualCall);
  This.setAddress(NewThisAddr);
}

return EmitCXXMemberOrOperatorCall(
    CalleeDecl, Callee, ReturnValue, This.getPointer(*this),
    /*ImplicitParam=*/nullptr, QualType(), CE, RtlArgs);
426}

428RValue
429CodeGenFunction::EmitCXXMemberPointerCallExpr(const CXXMemberCallExpr *E,
                                            ReturnValueSlot ReturnValue) {
const BinaryOperator *BO =
    cast<BinaryOperator>(E->getCallee()->IgnoreParens());
const Expr *BaseExpr = BO->getLHS();
const Expr *MemFnExpr = BO->getRHS();

const auto *MPT = MemFnExpr->getType()->castAs<MemberPointerType>();
const auto *FPT = MPT->getPointeeType()->castAs<FunctionProtoType>();
const auto *RD =
    cast<CXXRecordDecl>(MPT->getClass()->castAs<RecordType>()->getDecl());

// Emit the 'this' pointer.
Address This = Address::invalid();
if (BO->getOpcode() == BO_PtrMemI)
  This = EmitPointerWithAlignment(BaseExpr);
else
  This = EmitLValue(BaseExpr).getAddress(*this);

EmitTypeCheck(TCK_MemberCall, E->getExprLoc(), This.getPointer(),
              QualType(MPT->getClass(), 0));

// Get the member function pointer.
llvm::Value *MemFnPtr = EmitScalarExpr(MemFnExpr);

// Ask the ABI to load the callee.  Note that This is modified.
llvm::Value *ThisPtrForCall = nullptr;
CGCallee Callee =
  CGM.getCXXABI().EmitLoadOfMemberFunctionPointer(*this, BO, This,
                                           ThisPtrForCall, MemFnPtr, MPT);

CallArgList Args;

QualType ThisType =
  getContext().getPointerType(getContext().getTagDeclType(RD));

// Push the this ptr.
Args.add(RValue::get(ThisPtrForCall), ThisType);

RequiredArgs required = RequiredArgs::forPrototypePlus(FPT, 1);

// And the rest of the call args
EmitCallArgs(Args, FPT, E->arguments());
return EmitCall(CGM.getTypes().arrangeCXXMethodCall(Args, FPT, required,
                                                    /*PrefixSize=*/0),
                Callee, ReturnValue, Args, nullptr, E->getExprLoc());
475}

477RValue
478CodeGenFunction::EmitCXXOperatorMemberCallExpr(const CXXOperatorCallExpr *E,
                                             const CXXMethodDecl *MD,
                                             ReturnValueSlot ReturnValue) {
assert(MD->isInstance() &&((MD->isInstance() && "Trying to emit a member call expr on a static method!"
) ? static_cast<void> (0) : __assert_fail ("MD->isInstance() && \"Trying to emit a member call expr on a static method!\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 482, __PRETTY_FUNCTION__))
       "Trying to emit a member call expr on a static method!")((MD->isInstance() && "Trying to emit a member call expr on a static method!"
) ? static_cast<void> (0) : __assert_fail ("MD->isInstance() && \"Trying to emit a member call expr on a static method!\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 482, __PRETTY_FUNCTION__));
return EmitCXXMemberOrOperatorMemberCallExpr(
    E, MD, ReturnValue, /*HasQualifier=*/false, /*Qualifier=*/nullptr,
    /*IsArrow=*/false, E->getArg(0));
486}

488RValue CodeGenFunction::EmitCUDAKernelCallExpr(const CUDAKernelCallExpr *E,
                                             ReturnValueSlot ReturnValue) {
return CGM.getCUDARuntime().EmitCUDAKernelCallExpr(*this, E, ReturnValue);
491}

493static void EmitNullBaseClassInitialization(CodeGenFunction &CGF,
                                          Address DestPtr,
                                          const CXXRecordDecl *Base) {
if (Base->isEmpty())
  return;

DestPtr = CGF.Builder.CreateElementBitCast(DestPtr, CGF.Int8Ty);

const ASTRecordLayout &Layout = CGF.getContext().getASTRecordLayout(Base);
CharUnits NVSize = Layout.getNonVirtualSize();

// We cannot simply zero-initialize the entire base sub-object if vbptrs are
// present, they are initialized by the most derived class before calling the
// constructor.
SmallVector<std::pair<CharUnits, CharUnits>, 1> Stores;
Stores.emplace_back(CharUnits::Zero(), NVSize);

// Each store is split by the existence of a vbptr.
CharUnits VBPtrWidth = CGF.getPointerSize();
std::vector<CharUnits> VBPtrOffsets =
    CGF.CGM.getCXXABI().getVBPtrOffsets(Base);
for (CharUnits VBPtrOffset : VBPtrOffsets) {
  // Stop before we hit any virtual base pointers located in virtual bases.
  if (VBPtrOffset >= NVSize)
    break;
  std::pair<CharUnits, CharUnits> LastStore = Stores.pop_back_val();
  CharUnits LastStoreOffset = LastStore.first;
  CharUnits LastStoreSize = LastStore.second;

  CharUnits SplitBeforeOffset = LastStoreOffset;
  CharUnits SplitBeforeSize = VBPtrOffset - SplitBeforeOffset;
  assert(!SplitBeforeSize.isNegative() && "negative store size!")((!SplitBeforeSize.isNegative() && "negative store size!"
) ? static_cast<void> (0) : __assert_fail ("!SplitBeforeSize.isNegative() && \"negative store size!\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 524, __PRETTY_FUNCTION__));
  if (!SplitBeforeSize.isZero())
    Stores.emplace_back(SplitBeforeOffset, SplitBeforeSize);

  CharUnits SplitAfterOffset = VBPtrOffset + VBPtrWidth;
  CharUnits SplitAfterSize = LastStoreSize - SplitAfterOffset;
  assert(!SplitAfterSize.isNegative() && "negative store size!")((!SplitAfterSize.isNegative() && "negative store size!"
) ? static_cast<void> (0) : __assert_fail ("!SplitAfterSize.isNegative() && \"negative store size!\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 530, __PRETTY_FUNCTION__));
  if (!SplitAfterSize.isZero())
    Stores.emplace_back(SplitAfterOffset, SplitAfterSize);
}

// If the type contains a pointer to data member we can't memset it to zero.
// Instead, create a null constant and copy it to the destination.
// TODO: there are other patterns besides zero that we can usefully memset,
// like -1, which happens to be the pattern used by member-pointers.
// TODO: isZeroInitializable can be over-conservative in the case where a
// virtual base contains a member pointer.
llvm::Constant *NullConstantForBase = CGF.CGM.EmitNullConstantForBase(Base);
if (!NullConstantForBase->isNullValue()) {
  llvm::GlobalVariable *NullVariable = new llvm::GlobalVariable(
      CGF.CGM.getModule(), NullConstantForBase->getType(),
      /*isConstant=*/true, llvm::GlobalVariable::PrivateLinkage,
      NullConstantForBase, Twine());

  CharUnits Align = std::max(Layout.getNonVirtualAlignment(),
                             DestPtr.getAlignment());
  NullVariable->setAlignment(Align.getAsAlign());

  Address SrcPtr = Address(CGF.EmitCastToVoidPtr(NullVariable), Align);

  // Get and call the appropriate llvm.memcpy overload.
  for (std::pair<CharUnits, CharUnits> Store : Stores) {
    CharUnits StoreOffset = Store.first;
    CharUnits StoreSize = Store.second;
    llvm::Value *StoreSizeVal = CGF.CGM.getSize(StoreSize);
    CGF.Builder.CreateMemCpy(
        CGF.Builder.CreateConstInBoundsByteGEP(DestPtr, StoreOffset),
        CGF.Builder.CreateConstInBoundsByteGEP(SrcPtr, StoreOffset),
        StoreSizeVal);
  }

// Otherwise, just memset the whole thing to zero.  This is legal
// because in LLVM, all default initializers (other than the ones we just
// handled above) are guaranteed to have a bit pattern of all zeros.
} else {
  for (std::pair<CharUnits, CharUnits> Store : Stores) {
    CharUnits StoreOffset = Store.first;
    CharUnits StoreSize = Store.second;
    llvm::Value *StoreSizeVal = CGF.CGM.getSize(StoreSize);
    CGF.Builder.CreateMemSet(
        CGF.Builder.CreateConstInBoundsByteGEP(DestPtr, StoreOffset),
        CGF.Builder.getInt8(0), StoreSizeVal);
  }
}
578}

580void
581CodeGenFunction::EmitCXXConstructExpr(const CXXConstructExpr *E,
                                    AggValueSlot Dest) {
assert(!Dest.isIgnored() && "Must have a destination!")((!Dest.isIgnored() && "Must have a destination!") ? static_cast
<void> (0) : __assert_fail ("!Dest.isIgnored() && \"Must have a destination!\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 583, __PRETTY_FUNCTION__));
const CXXConstructorDecl *CD = E->getConstructor();

// If we require zero initialization before (or instead of) calling the
// constructor, as can be the case with a non-user-provided default
// constructor, emit the zero initialization now, unless destination is
// already zeroed.
if (E->requiresZeroInitialization() && !Dest.isZeroed()) {
  switch (E->getConstructionKind()) {
  case CXXConstructExpr::CK_Delegating:
  case CXXConstructExpr::CK_Complete:
    EmitNullInitialization(Dest.getAddress(), E->getType());
    break;
  case CXXConstructExpr::CK_VirtualBase:
  case CXXConstructExpr::CK_NonVirtualBase:
    EmitNullBaseClassInitialization(*this, Dest.getAddress(),
                                    CD->getParent());
    break;
  }
}

// If this is a call to a trivial default constructor, do nothing.
if (CD->isTrivial() && CD->isDefaultConstructor())
  return;

// Elide the constructor if we're constructing from a temporary.
// The temporary check is required because Sema sets this on NRVO
// returns.
if (getLangOpts().ElideConstructors && E->isElidable()) {
  assert(getContext().hasSameUnqualifiedType(E->getType(),((getContext().hasSameUnqualifiedType(E->getType(), E->
getArg(0)->getType())) ? static_cast<void> (0) : __assert_fail
 ("getContext().hasSameUnqualifiedType(E->getType(), E->getArg(0)->getType())"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 613, __PRETTY_FUNCTION__))
                                             E->getArg(0)->getType()))((getContext().hasSameUnqualifiedType(E->getType(), E->
getArg(0)->getType())) ? static_cast<void> (0) : __assert_fail
 ("getContext().hasSameUnqualifiedType(E->getType(), E->getArg(0)->getType())"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 613, __PRETTY_FUNCTION__));
  if (E->getArg(0)->isTemporaryObject(getContext(), CD->getParent())) {
    EmitAggExpr(E->getArg(0), Dest);
    return;
  }
}

if (const ArrayType *arrayType
      = getContext().getAsArrayType(E->getType())) {
  EmitCXXAggrConstructorCall(CD, arrayType, Dest.getAddress(), E,
                             Dest.isSanitizerChecked());
} else {
  CXXCtorType Type = Ctor_Complete;
  bool ForVirtualBase = false;
  bool Delegating = false;

  switch (E->getConstructionKind()) {
   case CXXConstructExpr::CK_Delegating:
    // We should be emitting a constructor; GlobalDecl will assert this
    Type = CurGD.getCtorType();
    Delegating = true;
    break;

   case CXXConstructExpr::CK_Complete:
    Type = Ctor_Complete;
    break;

   case CXXConstructExpr::CK_VirtualBase:
    ForVirtualBase = true;
    LLVM_FALLTHROUGH[[gnu::fallthrough]];

   case CXXConstructExpr::CK_NonVirtualBase:
    Type = Ctor_Base;
   }

   // Call the constructor.
   EmitCXXConstructorCall(CD, Type, ForVirtualBase, Delegating, Dest, E);
}
651}

653void CodeGenFunction::EmitSynthesizedCXXCopyCtor(Address Dest, Address Src,
                                               const Expr *Exp) {
if (const ExprWithCleanups *E = dyn_cast<ExprWithCleanups>(Exp))
  Exp = E->getSubExpr();
assert(isa<CXXConstructExpr>(Exp) &&((isa<CXXConstructExpr>(Exp) && "EmitSynthesizedCXXCopyCtor - unknown copy ctor expr"
) ? static_cast<void> (0) : __assert_fail ("isa<CXXConstructExpr>(Exp) && \"EmitSynthesizedCXXCopyCtor - unknown copy ctor expr\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 658, __PRETTY_FUNCTION__))
       "EmitSynthesizedCXXCopyCtor - unknown copy ctor expr")((isa<CXXConstructExpr>(Exp) && "EmitSynthesizedCXXCopyCtor - unknown copy ctor expr"
) ? static_cast<void> (0) : __assert_fail ("isa<CXXConstructExpr>(Exp) && \"EmitSynthesizedCXXCopyCtor - unknown copy ctor expr\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 658, __PRETTY_FUNCTION__));
const CXXConstructExpr* E = cast<CXXConstructExpr>(Exp);
const CXXConstructorDecl *CD = E->getConstructor();
RunCleanupsScope Scope(*this);

// If we require zero initialization before (or instead of) calling the
// constructor, as can be the case with a non-user-provided default
// constructor, emit the zero initialization now.
// FIXME. Do I still need this for a copy ctor synthesis?
if (E->requiresZeroInitialization())
  EmitNullInitialization(Dest, E->getType());

assert(!getContext().getAsConstantArrayType(E->getType())((!getContext().getAsConstantArrayType(E->getType()) &&
 "EmitSynthesizedCXXCopyCtor - Copied-in Array") ? static_cast
<void> (0) : __assert_fail ("!getContext().getAsConstantArrayType(E->getType()) && \"EmitSynthesizedCXXCopyCtor - Copied-in Array\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 671, __PRETTY_FUNCTION__))
       && "EmitSynthesizedCXXCopyCtor - Copied-in Array")((!getContext().getAsConstantArrayType(E->getType()) &&
 "EmitSynthesizedCXXCopyCtor - Copied-in Array") ? static_cast
<void> (0) : __assert_fail ("!getContext().getAsConstantArrayType(E->getType()) && \"EmitSynthesizedCXXCopyCtor - Copied-in Array\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 671, __PRETTY_FUNCTION__));
EmitSynthesizedCXXCopyCtorCall(CD, Dest, Src, E);
673}

675static CharUnits CalculateCookiePadding(CodeGenFunction &CGF,
                                      const CXXNewExpr *E) {
if (!E->isArray())
  return CharUnits::Zero();

// No cookie is required if the operator new[] being used is the
// reserved placement operator new[].
if (E->getOperatorNew()->isReservedGlobalPlacementOperator())
  return CharUnits::Zero();

return CGF.CGM.getCXXABI().GetArrayCookieSize(E);
686}

688static llvm::Value *EmitCXXNewAllocSize(CodeGenFunction &CGF,
                                      const CXXNewExpr *e,
                                      unsigned minElements,
                                      llvm::Value *&numElements,
                                      llvm::Value *&sizeWithoutCookie) {
QualType type = e->getAllocatedType();

if (!e->isArray()) {
  CharUnits typeSize = CGF.getContext().getTypeSizeInChars(type);
  sizeWithoutCookie
    = llvm::ConstantInt::get(CGF.SizeTy, typeSize.getQuantity());
  return sizeWithoutCookie;
}

// The width of size_t.
unsigned sizeWidth = CGF.SizeTy->getBitWidth();

// Figure out the cookie size.
llvm::APInt cookieSize(sizeWidth,
                       CalculateCookiePadding(CGF, e).getQuantity());

// Emit the array size expression.
// We multiply the size of all dimensions for NumElements.
// e.g for 'int[2][3]', ElemType is 'int' and NumElements is 6.
numElements =
  ConstantEmitter(CGF).tryEmitAbstract(*e->getArraySize(), e->getType());
if (!numElements)
  numElements = CGF.EmitScalarExpr(*e->getArraySize());
assert(isa<llvm::IntegerType>(numElements->getType()))((isa<llvm::IntegerType>(numElements->getType())) ? static_cast
<void> (0) : __assert_fail ("isa<llvm::IntegerType>(numElements->getType())"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 716, __PRETTY_FUNCTION__));

// The number of elements can be have an arbitrary integer type;
// essentially, we need to multiply it by a constant factor, add a
// cookie size, and verify that the result is representable as a
// size_t.  That's just a gloss, though, and it's wrong in one
// important way: if the count is negative, it's an error even if
// the cookie size would bring the total size >= 0.
bool isSigned
  = (*e->getArraySize())->getType()->isSignedIntegerOrEnumerationType();
llvm::IntegerType *numElementsType
  = cast<llvm::IntegerType>(numElements->getType());
unsigned numElementsWidth = numElementsType->getBitWidth();

// Compute the constant factor.
llvm::APInt arraySizeMultiplier(sizeWidth, 1);
while (const ConstantArrayType *CAT
           = CGF.getContext().getAsConstantArrayType(type)) {
  type = CAT->getElementType();
  arraySizeMultiplier *= CAT->getSize();
}

CharUnits typeSize = CGF.getContext().getTypeSizeInChars(type);
llvm::APInt typeSizeMultiplier(sizeWidth, typeSize.getQuantity());
typeSizeMultiplier *= arraySizeMultiplier;

// This will be a size_t.
llvm::Value *size;

// If someone is doing 'new int[42]' there is no need to do a dynamic check.
// Don't bloat the -O0 code.
if (llvm::ConstantInt *numElementsC =
      dyn_cast<llvm::ConstantInt>(numElements)) {
  const llvm::APInt &count = numElementsC->getValue();

  bool hasAnyOverflow = false;

  // If 'count' was a negative number, it's an overflow.
  if (isSigned && count.isNegative())
    hasAnyOverflow = true;

  // We want to do all this arithmetic in size_t.  If numElements is
  // wider than that, check whether it's already too big, and if so,
  // overflow.
  else if (numElementsWidth > sizeWidth &&
           numElementsWidth - sizeWidth > count.countLeadingZeros())
    hasAnyOverflow = true;

  // Okay, compute a count at the right width.
  llvm::APInt adjustedCount = count.zextOrTrunc(sizeWidth);

  // If there is a brace-initializer, we cannot allocate fewer elements than
  // there are initializers. If we do, that's treated like an overflow.
  if (adjustedCount.ult(minElements))
    hasAnyOverflow = true;

  // Scale numElements by that.  This might overflow, but we don't
  // care because it only overflows if allocationSize does, too, and
  // if that overflows then we shouldn't use this.
  numElements = llvm::ConstantInt::get(CGF.SizeTy,
                                       adjustedCount * arraySizeMultiplier);

  // Compute the size before cookie, and track whether it overflowed.
  bool overflow;
  llvm::APInt allocationSize
    = adjustedCount.umul_ov(typeSizeMultiplier, overflow);
  hasAnyOverflow |= overflow;

  // Add in the cookie, and check whether it's overflowed.
  if (cookieSize != 0) {
    // Save the current size without a cookie.  This shouldn't be
    // used if there was overflow.
    sizeWithoutCookie = llvm::ConstantInt::get(CGF.SizeTy, allocationSize);

    allocationSize = allocationSize.uadd_ov(cookieSize, overflow);
    hasAnyOverflow |= overflow;
  }

  // On overflow, produce a -1 so operator new will fail.
  if (hasAnyOverflow) {
    size = llvm::Constant::getAllOnesValue(CGF.SizeTy);
  } else {
    size = llvm::ConstantInt::get(CGF.SizeTy, allocationSize);
  }

// Otherwise, we might need to use the overflow intrinsics.
} else {
  // There are up to five conditions we need to test for:
  // 1) if isSigned, we need to check whether numElements is negative;
  // 2) if numElementsWidth > sizeWidth, we need to check whether
  //   numElements is larger than something representable in size_t;
  // 3) if minElements > 0, we need to check whether numElements is smaller
  //    than that.
  // 4) we need to compute
  //      sizeWithoutCookie := numElements * typeSizeMultiplier
  //    and check whether it overflows; and
  // 5) if we need a cookie, we need to compute
  //      size := sizeWithoutCookie + cookieSize
  //    and check whether it overflows.

  llvm::Value *hasOverflow = nullptr;

  // If numElementsWidth > sizeWidth, then one way or another, we're
  // going to have to do a comparison for (2), and this happens to
  // take care of (1), too.
  if (numElementsWidth > sizeWidth) {
    llvm::APInt threshold(numElementsWidth, 1);
    threshold <<= sizeWidth;

    llvm::Value *thresholdV
      = llvm::ConstantInt::get(numElementsType, threshold);

    hasOverflow = CGF.Builder.CreateICmpUGE(numElements, thresholdV);
    numElements = CGF.Builder.CreateTrunc(numElements, CGF.SizeTy);

  // Otherwise, if we're signed, we want to sext up to size_t.
  } else if (isSigned) {
    if (numElementsWidth < sizeWidth)
      numElements = CGF.Builder.CreateSExt(numElements, CGF.SizeTy);

    // If there's a non-1 type size multiplier, then we can do the
    // signedness check at the same time as we do the multiply
    // because a negative number times anything will cause an
    // unsigned overflow.  Otherwise, we have to do it here. But at least
    // in this case, we can subsume the >= minElements check.
    if (typeSizeMultiplier == 1)
      hasOverflow = CGF.Builder.CreateICmpSLT(numElements,
                            llvm::ConstantInt::get(CGF.SizeTy, minElements));

  // Otherwise, zext up to size_t if necessary.
  } else if (numElementsWidth < sizeWidth) {
    numElements = CGF.Builder.CreateZExt(numElements, CGF.SizeTy);
  }

  assert(numElements->getType() == CGF.SizeTy)((numElements->getType() == CGF.SizeTy) ? static_cast<void
> (0) : __assert_fail ("numElements->getType() == CGF.SizeTy"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 850, __PRETTY_FUNCTION__));

  if (minElements) {
    // Don't allow allocation of fewer elements than we have initializers.
    if (!hasOverflow) {
      hasOverflow = CGF.Builder.CreateICmpULT(numElements,
                            llvm::ConstantInt::get(CGF.SizeTy, minElements));
    } else if (numElementsWidth > sizeWidth) {
      // The other existing overflow subsumes this check.
      // We do an unsigned comparison, since any signed value < -1 is
      // taken care of either above or below.
      hasOverflow = CGF.Builder.CreateOr(hasOverflow,
                        CGF.Builder.CreateICmpULT(numElements,
                            llvm::ConstantInt::get(CGF.SizeTy, minElements)));
    }
  }

  size = numElements;

  // Multiply by the type size if necessary.  This multiplier
  // includes all the factors for nested arrays.
  //
  // This step also causes numElements to be scaled up by the
  // nested-array factor if necessary.  Overflow on this computation
  // can be ignored because the result shouldn't be used if
  // allocation fails.
  if (typeSizeMultiplier != 1) {
    llvm::Function *umul_with_overflow
      = CGF.CGM.getIntrinsic(llvm::Intrinsic::umul_with_overflow, CGF.SizeTy);

    llvm::Value *tsmV =
      llvm::ConstantInt::get(CGF.SizeTy, typeSizeMultiplier);
    llvm::Value *result =
        CGF.Builder.CreateCall(umul_with_overflow, {size, tsmV});

    llvm::Value *overflowed = CGF.Builder.CreateExtractValue(result, 1);
    if (hasOverflow)
      hasOverflow = CGF.Builder.CreateOr(hasOverflow, overflowed);
    else
      hasOverflow = overflowed;

    size = CGF.Builder.CreateExtractValue(result, 0);

    // Also scale up numElements by the array size multiplier.
    if (arraySizeMultiplier != 1) {
      // If the base element type size is 1, then we can re-use the
      // multiply we just did.
      if (typeSize.isOne()) {
        assert(arraySizeMultiplier == typeSizeMultiplier)((arraySizeMultiplier == typeSizeMultiplier) ? static_cast<
void> (0) : __assert_fail ("arraySizeMultiplier == typeSizeMultiplier"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 898, __PRETTY_FUNCTION__));
        numElements = size;

      // Otherwise we need a separate multiply.
      } else {
        llvm::Value *asmV =
          llvm::ConstantInt::get(CGF.SizeTy, arraySizeMultiplier);
        numElements = CGF.Builder.CreateMul(numElements, asmV);
      }
    }
  } else {
    // numElements doesn't need to be scaled.
    assert(arraySizeMultiplier == 1)((arraySizeMultiplier == 1) ? static_cast<void> (0) : __assert_fail
 ("arraySizeMultiplier == 1", "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 910, __PRETTY_FUNCTION__));
  }

  // Add in the cookie size if necessary.
  if (cookieSize != 0) {
    sizeWithoutCookie = size;

    llvm::Function *uadd_with_overflow
      = CGF.CGM.getIntrinsic(llvm::Intrinsic::uadd_with_overflow, CGF.SizeTy);

    llvm::Value *cookieSizeV = llvm::ConstantInt::get(CGF.SizeTy, cookieSize);
    llvm::Value *result =
        CGF.Builder.CreateCall(uadd_with_overflow, {size, cookieSizeV});

    llvm::Value *overflowed = CGF.Builder.CreateExtractValue(result, 1);
    if (hasOverflow)
      hasOverflow = CGF.Builder.CreateOr(hasOverflow, overflowed);
    else
      hasOverflow = overflowed;

    size = CGF.Builder.CreateExtractValue(result, 0);
  }

  // If we had any possibility of dynamic overflow, make a select to
  // overwrite 'size' with an all-ones value, which should cause
  // operator new to throw.
  if (hasOverflow)
    size = CGF.Builder.CreateSelect(hasOverflow,
                               llvm::Constant::getAllOnesValue(CGF.SizeTy),
                                    size);
}

if (cookieSize == 0)
  sizeWithoutCookie = size;
else
  assert(sizeWithoutCookie && "didn't set sizeWithoutCookie?")((sizeWithoutCookie && "didn't set sizeWithoutCookie?"
) ? static_cast<void> (0) : __assert_fail ("sizeWithoutCookie && \"didn't set sizeWithoutCookie?\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 945, __PRETTY_FUNCTION__));

return size;
948}

950static void StoreAnyExprIntoOneUnit(CodeGenFunction &CGF, const Expr *Init,
                                  QualType AllocType, Address NewPtr,
                                  AggValueSlot::Overlap_t MayOverlap) {
// FIXME: Refactor with EmitExprAsInit.
switch (CGF.getEvaluationKind(AllocType)) {
case TEK_Scalar:
  CGF.EmitScalarInit(Init, nullptr,
                     CGF.MakeAddrLValue(NewPtr, AllocType), false);
  return;
case TEK_Complex:
  CGF.EmitComplexExprIntoLValue(Init, CGF.MakeAddrLValue(NewPtr, AllocType),
                                /*isInit*/ true);
  return;
case TEK_Aggregate: {
  AggValueSlot Slot
    = AggValueSlot::forAddr(NewPtr, AllocType.getQualifiers(),
                            AggValueSlot::IsDestructed,
                            AggValueSlot::DoesNotNeedGCBarriers,
                            AggValueSlot::IsNotAliased,
                            MayOverlap, AggValueSlot::IsNotZeroed,
                            AggValueSlot::IsSanitizerChecked);
  CGF.EmitAggExpr(Init, Slot);
  return;
}
}
llvm_unreachable("bad evaluation kind")::llvm::llvm_unreachable_internal("bad evaluation kind", "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 975);
976}

978void CodeGenFunction::EmitNewArrayInitializer(
  const CXXNewExpr *E, QualType ElementType, llvm::Type *ElementTy,
  Address BeginPtr, llvm::Value *NumElements,
  llvm::Value *AllocSizeWithoutCookie) {
// If we have a type with trivial initialization and no initializer,
// there's nothing to do.
if (!E->hasInitializer())
  return;

Address CurPtr = BeginPtr;

unsigned InitListElements = 0;

const Expr *Init = E->getInitializer();
Address EndOfInit = Address::invalid();
QualType::DestructionKind DtorKind = ElementType.isDestructedType();
EHScopeStack::stable_iterator Cleanup;
llvm::Instruction *CleanupDominator = nullptr;

CharUnits ElementSize = getContext().getTypeSizeInChars(ElementType);
CharUnits ElementAlign =
  BeginPtr.getAlignment().alignmentOfArrayElement(ElementSize);

// Attempt to perform zero-initialization using memset.
auto TryMemsetInitialization = [&]() -> bool {
  // FIXME: If the type is a pointer-to-data-member under the Itanium ABI,
  // we can initialize with a memset to -1.
  if (!CGM.getTypes().isZeroInitializable(ElementType))
    return false;

  // Optimization: since zero initialization will just set the memory
  // to all zeroes, generate a single memset to do it in one shot.

  // Subtract out the size of any elements we've already initialized.
  auto *RemainingSize = AllocSizeWithoutCookie;
  if (InitListElements) {
    // We know this can't overflow; we check this when doing the allocation.
    auto *InitializedSize = llvm::ConstantInt::get(
        RemainingSize->getType(),
        getContext().getTypeSizeInChars(ElementType).getQuantity() *
            InitListElements);
    RemainingSize = Builder.CreateSub(RemainingSize, InitializedSize);
  }

  // Create the memset.
  Builder.CreateMemSet(CurPtr, Builder.getInt8(0), RemainingSize, false);
  return true;
};

// If the initializer is an initializer list, first do the explicit elements.
if (const InitListExpr *ILE = dyn_cast<InitListExpr>(Init)) {
  // Initializing from a (braced) string literal is a special case; the init
  // list element does not initialize a (single) array element.
  if (ILE->isStringLiteralInit()) {
    // Initialize the initial portion of length equal to that of the string
    // literal. The allocation must be for at least this much; we emitted a
    // check for that earlier.
    AggValueSlot Slot =
        AggValueSlot::forAddr(CurPtr, ElementType.getQualifiers(),
                              AggValueSlot::IsDestructed,
                              AggValueSlot::DoesNotNeedGCBarriers,
                              AggValueSlot::IsNotAliased,
                              AggValueSlot::DoesNotOverlap,
                              AggValueSlot::IsNotZeroed,
                              AggValueSlot::IsSanitizerChecked);
    EmitAggExpr(ILE->getInit(0), Slot);

    // Move past these elements.
    InitListElements =
        cast<ConstantArrayType>(ILE->getType()->getAsArrayTypeUnsafe())
            ->getSize().getZExtValue();
    CurPtr =
        Address(Builder.CreateInBoundsGEP(CurPtr.getPointer(),
                                          Builder.getSize(InitListElements),
                                          "string.init.end"),
                CurPtr.getAlignment().alignmentAtOffset(InitListElements *
                                                        ElementSize));

    // Zero out the rest, if any remain.
    llvm::ConstantInt *ConstNum = dyn_cast<llvm::ConstantInt>(NumElements);
    if (!ConstNum || !ConstNum->equalsInt(InitListElements)) {
      bool OK = TryMemsetInitialization();
      (void)OK;
      assert(OK && "couldn't memset character type?")((OK && "couldn't memset character type?") ? static_cast
<void> (0) : __assert_fail ("OK && \"couldn't memset character type?\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 1061, __PRETTY_FUNCTION__));
    }
    return;
  }

  InitListElements = ILE->getNumInits();

  // If this is a multi-dimensional array new, we will initialize multiple
  // elements with each init list element.
  QualType AllocType = E->getAllocatedType();
  if (const ConstantArrayType *CAT = dyn_cast_or_null<ConstantArrayType>(
          AllocType->getAsArrayTypeUnsafe())) {
    ElementTy = ConvertTypeForMem(AllocType);
    CurPtr = Builder.CreateElementBitCast(CurPtr, ElementTy);
    InitListElements *= getContext().getConstantArrayElementCount(CAT);
  }

  // Enter a partial-destruction Cleanup if necessary.
  if (needsEHCleanup(DtorKind)) {
    // In principle we could tell the Cleanup where we are more
    // directly, but the control flow can get so varied here that it
    // would actually be quite complex.  Therefore we go through an
    // alloca.
    EndOfInit = CreateTempAlloca(BeginPtr.getType(), getPointerAlign(),
                                 "array.init.end");
    CleanupDominator = Builder.CreateStore(BeginPtr.getPointer(), EndOfInit);
    pushIrregularPartialArrayCleanup(BeginPtr.getPointer(), EndOfInit,
                                     ElementType, ElementAlign,
                                     getDestroyer(DtorKind));
    Cleanup = EHStack.stable_begin();
  }

  CharUnits StartAlign = CurPtr.getAlignment();
  for (unsigned i = 0, e = ILE->getNumInits(); i != e; ++i) {
    // Tell the cleanup that it needs to destroy up to this
    // element.  TODO: some of these stores can be trivially
    // observed to be unnecessary.
    if (EndOfInit.isValid()) {
      auto FinishedPtr =
        Builder.CreateBitCast(CurPtr.getPointer(), BeginPtr.getType());
      Builder.CreateStore(FinishedPtr, EndOfInit);
    }
    // FIXME: If the last initializer is an incomplete initializer list for
    // an array, and we have an array filler, we can fold together the two
    // initialization loops.
    StoreAnyExprIntoOneUnit(*this, ILE->getInit(i),
                            ILE->getInit(i)->getType(), CurPtr,
                            AggValueSlot::DoesNotOverlap);
    CurPtr = Address(Builder.CreateInBoundsGEP(CurPtr.getPointer(),
                                               Builder.getSize(1),
                                               "array.exp.next"),
                     StartAlign.alignmentAtOffset((i + 1) * ElementSize));
  }

  // The remaining elements are filled with the array filler expression.
  Init = ILE->getArrayFiller();

  // Extract the initializer for the individual array elements by pulling
  // out the array filler from all the nested initializer lists. This avoids
  // generating a nested loop for the initialization.
  while (Init && Init->getType()->isConstantArrayType()) {
    auto *SubILE = dyn_cast<InitListExpr>(Init);
    if (!SubILE)
      break;
    assert(SubILE->getNumInits() == 0 && "explicit inits in array filler?")((SubILE->getNumInits() == 0 && "explicit inits in array filler?"
) ? static_cast<void> (0) : __assert_fail ("SubILE->getNumInits() == 0 && \"explicit inits in array filler?\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 1125, __PRETTY_FUNCTION__));
    Init = SubILE->getArrayFiller();
  }

  // Switch back to initializing one base element at a time.
  CurPtr = Builder.CreateBitCast(CurPtr, BeginPtr.getType());
}

// If all elements have already been initialized, skip any further
// initialization.
llvm::ConstantInt *ConstNum = dyn_cast<llvm::ConstantInt>(NumElements);
if (ConstNum && ConstNum->getZExtValue() <= InitListElements) {
  // If there was a Cleanup, deactivate it.
  if (CleanupDominator)
    DeactivateCleanupBlock(Cleanup, CleanupDominator);
  return;
}

assert(Init && "have trailing elements to initialize but no initializer")((Init && "have trailing elements to initialize but no initializer"
) ? static_cast<void> (0) : __assert_fail ("Init && \"have trailing elements to initialize but no initializer\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 1143, __PRETTY_FUNCTION__));

// If this is a constructor call, try to optimize it out, and failing that
// emit a single loop to initialize all remaining elements.
if (const CXXConstructExpr *CCE = dyn_cast<CXXConstructExpr>(Init)) {
  CXXConstructorDecl *Ctor = CCE->getConstructor();
  if (Ctor->isTrivial()) {
    // If new expression did not specify value-initialization, then there
    // is no initialization.
    if (!CCE->requiresZeroInitialization() || Ctor->getParent()->isEmpty())
      return;

    if (TryMemsetInitialization())
      return;
  }

  // Store the new Cleanup position for irregular Cleanups.
  //
  // FIXME: Share this cleanup with the constructor call emission rather than
  // having it create a cleanup of its own.
  if (EndOfInit.isValid())
    Builder.CreateStore(CurPtr.getPointer(), EndOfInit);

  // Emit a constructor call loop to initialize the remaining elements.
  if (InitListElements)
    NumElements = Builder.CreateSub(
        NumElements,
        llvm::ConstantInt::get(NumElements->getType(), InitListElements));
  EmitCXXAggrConstructorCall(Ctor, NumElements, CurPtr, CCE,
                             /*NewPointerIsChecked*/true,
                             CCE->requiresZeroInitialization());
  return;
}

// If this is value-initialization, we can usually use memset.
ImplicitValueInitExpr IVIE(ElementType);
if (isa<ImplicitValueInitExpr>(Init)) {
  if (TryMemsetInitialization())
    return;

  // Switch to an ImplicitValueInitExpr for the element type. This handles
  // only one case: multidimensional array new of pointers to members. In
  // all other cases, we already have an initializer for the array element.
  Init = &IVIE;
}

// At this point we should have found an initializer for the individual
// elements of the array.
assert(getContext().hasSameUnqualifiedType(ElementType, Init->getType()) &&((getContext().hasSameUnqualifiedType(ElementType, Init->getType
()) && "got wrong type of element to initialize") ? static_cast
<void> (0) : __assert_fail ("getContext().hasSameUnqualifiedType(ElementType, Init->getType()) && \"got wrong type of element to initialize\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 1192, __PRETTY_FUNCTION__))
       "got wrong type of element to initialize")((getContext().hasSameUnqualifiedType(ElementType, Init->getType
()) && "got wrong type of element to initialize") ? static_cast
<void> (0) : __assert_fail ("getContext().hasSameUnqualifiedType(ElementType, Init->getType()) && \"got wrong type of element to initialize\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 1192, __PRETTY_FUNCTION__));

// If we have an empty initializer list, we can usually use memset.
if (auto *ILE = dyn_cast<InitListExpr>(Init))
  if (ILE->getNumInits() == 0 && TryMemsetInitialization())
    return;

// If we have a struct whose every field is value-initialized, we can
// usually use memset.
if (auto *ILE = dyn_cast<InitListExpr>(Init)) {
  if (const RecordType *RType = ILE->getType()->getAs<RecordType>()) {
    if (RType->getDecl()->isStruct()) {
      unsigned NumElements = 0;
      if (auto *CXXRD = dyn_cast<CXXRecordDecl>(RType->getDecl()))
        NumElements = CXXRD->getNumBases();
      for (auto *Field : RType->getDecl()->fields())
        if (!Field->isUnnamedBitfield())
          ++NumElements;
      // FIXME: Recurse into nested InitListExprs.
      if (ILE->getNumInits() == NumElements)
        for (unsigned i = 0, e = ILE->getNumInits(); i != e; ++i)
          if (!isa<ImplicitValueInitExpr>(ILE->getInit(i)))
            --NumElements;
      if (ILE->getNumInits() == NumElements && TryMemsetInitialization())
        return;
    }
  }
}

// Create the loop blocks.
llvm::BasicBlock *EntryBB = Builder.GetInsertBlock();
llvm::BasicBlock *LoopBB = createBasicBlock("new.loop");
llvm::BasicBlock *ContBB = createBasicBlock("new.loop.end");

// Find the end of the array, hoisted out of the loop.
llvm::Value *EndPtr =
  Builder.CreateInBoundsGEP(BeginPtr.getPointer(), NumElements, "array.end");

// If the number of elements isn't constant, we have to now check if there is
// anything left to initialize.
if (!ConstNum) {
  llvm::Value *IsEmpty =
    Builder.CreateICmpEQ(CurPtr.getPointer(), EndPtr, "array.isempty");
  Builder.CreateCondBr(IsEmpty, ContBB, LoopBB);
}

// Enter the loop.
EmitBlock(LoopBB);

// Set up the current-element phi.
llvm::PHINode *CurPtrPhi =
  Builder.CreatePHI(CurPtr.getType(), 2, "array.cur");
CurPtrPhi->addIncoming(CurPtr.getPointer(), EntryBB);

CurPtr = Address(CurPtrPhi, ElementAlign);

// Store the new Cleanup position for irregular Cleanups.
if (EndOfInit.isValid())
  Builder.CreateStore(CurPtr.getPointer(), EndOfInit);

// Enter a partial-destruction Cleanup if necessary.
if (!CleanupDominator && needsEHCleanup(DtorKind)) {
  pushRegularPartialArrayCleanup(BeginPtr.getPointer(), CurPtr.getPointer(),
                                 ElementType, ElementAlign,
                                 getDestroyer(DtorKind));
  Cleanup = EHStack.stable_begin();
  CleanupDominator = Builder.CreateUnreachable();
}

// Emit the initializer into this element.
StoreAnyExprIntoOneUnit(*this, Init, Init->getType(), CurPtr,
                        AggValueSlot::DoesNotOverlap);

// Leave the Cleanup if we entered one.
if (CleanupDominator) {
  DeactivateCleanupBlock(Cleanup, CleanupDominator);
  CleanupDominator->eraseFromParent();
}

// Advance to the next element by adjusting the pointer type as necessary.
llvm::Value *NextPtr =
  Builder.CreateConstInBoundsGEP1_32(ElementTy, CurPtr.getPointer(), 1,
                                     "array.next");

// Check whether we've gotten to the end of the array and, if so,
// exit the loop.
llvm::Value *IsEnd = Builder.CreateICmpEQ(NextPtr, EndPtr, "array.atend");
Builder.CreateCondBr(IsEnd, ContBB, LoopBB);
CurPtrPhi->addIncoming(NextPtr, Builder.GetInsertBlock());

EmitBlock(ContBB);
1283}

1285static void EmitNewInitializer(CodeGenFunction &CGF, const CXXNewExpr *E,
                             QualType ElementType, llvm::Type *ElementTy,
                             Address NewPtr, llvm::Value *NumElements,
                             llvm::Value *AllocSizeWithoutCookie) {
ApplyDebugLocation DL(CGF, E);
if (E->isArray())
  CGF.EmitNewArrayInitializer(E, ElementType, ElementTy, NewPtr, NumElements,
                              AllocSizeWithoutCookie);
else if (const Expr *Init = E->getInitializer())
  StoreAnyExprIntoOneUnit(CGF, Init, E->getAllocatedType(), NewPtr,
                          AggValueSlot::DoesNotOverlap);
1296}

1298/// Emit a call to an operator new or operator delete function, as implicitly
1299/// created by new-expressions and delete-expressions.
1300static RValue EmitNewDeleteCall(CodeGenFunction &CGF,
                              const FunctionDecl *CalleeDecl,
                              const FunctionProtoType *CalleeType,
                              const CallArgList &Args) {
llvm::CallBase *CallOrInvoke;
llvm::Constant *CalleePtr = CGF.CGM.GetAddrOfFunction(CalleeDecl);
CGCallee Callee = CGCallee::forDirect(CalleePtr, GlobalDecl(CalleeDecl));
RValue RV =
    CGF.EmitCall(CGF.CGM.getTypes().arrangeFreeFunctionCall(
                     Args, CalleeType, /*ChainCall=*/false),
                 Callee, ReturnValueSlot(), Args, &CallOrInvoke);

/// C++1y [expr.new]p10:
///   [In a new-expression,] an implementation is allowed to omit a call
///   to a replaceable global allocation function.
///
/// We model such elidable calls with the 'builtin' attribute.
llvm::Function *Fn = dyn_cast<llvm::Function>(CalleePtr);
if (CalleeDecl->isReplaceableGlobalAllocationFunction() &&
    Fn && Fn->hasFnAttribute(llvm::Attribute::NoBuiltin)) {
  CallOrInvoke->addAttribute(llvm::AttributeList::FunctionIndex,
                             llvm::Attribute::Builtin);
}

return RV;
1325}

1327RValue CodeGenFunction::EmitBuiltinNewDeleteCall(const FunctionProtoType *Type,
                                               const CallExpr *TheCall,
                                               bool IsDelete) {
CallArgList Args;
EmitCallArgs(Args, Type->getParamTypes(), TheCall->arguments());
// Find the allocation or deallocation function that we're calling.
ASTContext &Ctx = getContext();
DeclarationName Name = Ctx.DeclarationNames
    .getCXXOperatorName(IsDelete ? OO_Delete : OO_New);

for (auto *Decl : Ctx.getTranslationUnitDecl()->lookup(Name))
  if (auto *FD = dyn_cast<FunctionDecl>(Decl))
    if (Ctx.hasSameType(FD->getType(), QualType(Type, 0)))
      return EmitNewDeleteCall(*this, FD, Type, Args);
llvm_unreachable("predeclared global operator new/delete is missing")::llvm::llvm_unreachable_internal("predeclared global operator new/delete is missing"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 1341);
1342}

1344namespace {
1345/// The parameters to pass to a usual operator delete.
1346struct UsualDeleteParams {
bool DestroyingDelete = false;
bool Size = false;
bool Alignment = false;
1350};
1351}

1353static UsualDeleteParams getUsualDeleteParams(const FunctionDecl *FD) {
UsualDeleteParams Params;

const FunctionProtoType *FPT = FD->getType()->castAs<FunctionProtoType>();
auto AI = FPT->param_type_begin(), AE = FPT->param_type_end();

// The first argument is always a void*.
++AI;

// The next parameter may be a std::destroying_delete_t.
if (FD->isDestroyingOperatorDelete()) {
  Params.DestroyingDelete = true;
  assert(AI != AE)((AI != AE) ? static_cast<void> (0) : __assert_fail ("AI != AE"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 1365, __PRETTY_FUNCTION__));
  ++AI;
}

// Figure out what other parameters we should be implicitly passing.
if (AI != AE && (*AI)->isIntegerType()) {
  Params.Size = true;
  ++AI;
}

if (AI != AE && (*AI)->isAlignValT()) {
  Params.Alignment = true;
  ++AI;
}

assert(AI == AE && "unexpected usual deallocation function parameter")((AI == AE && "unexpected usual deallocation function parameter"
) ? static_cast<void> (0) : __assert_fail ("AI == AE && \"unexpected usual deallocation function parameter\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 1380, __PRETTY_FUNCTION__));
return Params;
1382}

1384namespace {
/// A cleanup to call the given 'operator delete' function upon abnormal
/// exit from a new expression. Templated on a traits type that deals with
/// ensuring that the arguments dominate the cleanup if necessary.
template<typename Traits>
class CallDeleteDuringNew final : public EHScopeStack::Cleanup {
  /// Type used to hold llvm::Value*s.
  typedef typename Traits::ValueTy ValueTy;
  /// Type used to hold RValues.
  typedef typename Traits::RValueTy RValueTy;
  struct PlacementArg {
    RValueTy ArgValue;
    QualType ArgType;
  };

  unsigned NumPlacementArgs : 31;
  unsigned PassAlignmentToPlacementDelete : 1;
  const FunctionDecl *OperatorDelete;
  ValueTy Ptr;
  ValueTy AllocSize;
  CharUnits AllocAlign;

  PlacementArg *getPlacementArgs() {
    return reinterpret_cast<PlacementArg *>(this + 1);
  }

public:
  static size_t getExtraSize(size_t NumPlacementArgs) {
    return NumPlacementArgs * sizeof(PlacementArg);
  }

  CallDeleteDuringNew(size_t NumPlacementArgs,
                      const FunctionDecl *OperatorDelete, ValueTy Ptr,
                      ValueTy AllocSize, bool PassAlignmentToPlacementDelete,
                      CharUnits AllocAlign)
    : NumPlacementArgs(NumPlacementArgs),
      PassAlignmentToPlacementDelete(PassAlignmentToPlacementDelete),
      OperatorDelete(OperatorDelete), Ptr(Ptr), AllocSize(AllocSize),
      AllocAlign(AllocAlign) {}

  void setPlacementArg(unsigned I, RValueTy Arg, QualType Type) {
    assert(I < NumPlacementArgs && "index out of range")((I < NumPlacementArgs && "index out of range") ? static_cast
<void> (0) : __assert_fail ("I < NumPlacementArgs && \"index out of range\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 1425, __PRETTY_FUNCTION__));
    getPlacementArgs()[I] = {Arg, Type};
  }

  void Emit(CodeGenFunction &CGF, Flags flags) override {
    const FunctionProtoType *FPT =
        OperatorDelete->getType()->getAs<FunctionProtoType>();
    CallArgList DeleteArgs;

    // The first argument is always a void* (or C* for a destroying operator
    // delete for class type C).
    DeleteArgs.add(Traits::get(CGF, Ptr), FPT->getParamType(0));

    // Figure out what other parameters we should be implicitly passing.
    UsualDeleteParams Params;
    if (NumPlacementArgs) {
      // A placement deallocation function is implicitly passed an alignment
      // if the placement allocation function was, but is never passed a size.
      Params.Alignment = PassAlignmentToPlacementDelete;
    } else {
      // For a non-placement new-expression, 'operator delete' can take a
      // size and/or an alignment if it has the right parameters.
      Params = getUsualDeleteParams(OperatorDelete);
    }

    assert(!Params.DestroyingDelete &&((!Params.DestroyingDelete && "should not call destroying delete in a new-expression"
) ? static_cast<void> (0) : __assert_fail ("!Params.DestroyingDelete && \"should not call destroying delete in a new-expression\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 1451, __PRETTY_FUNCTION__))
           "should not call destroying delete in a new-expression")((!Params.DestroyingDelete && "should not call destroying delete in a new-expression"
) ? static_cast<void> (0) : __assert_fail ("!Params.DestroyingDelete && \"should not call destroying delete in a new-expression\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 1451, __PRETTY_FUNCTION__));

    // The second argument can be a std::size_t (for non-placement delete).
    if (Params.Size)
      DeleteArgs.add(Traits::get(CGF, AllocSize),
                     CGF.getContext().getSizeType());

    // The next (second or third) argument can be a std::align_val_t, which
    // is an enum whose underlying type is std::size_t.
    // FIXME: Use the right type as the parameter type. Note that in a call
    // to operator delete(size_t, ...), we may not have it available.
    if (Params.Alignment)
      DeleteArgs.add(RValue::get(llvm::ConstantInt::get(
                         CGF.SizeTy, AllocAlign.getQuantity())),
                     CGF.getContext().getSizeType());

    // Pass the rest of the arguments, which must match exactly.
    for (unsigned I = 0; I != NumPlacementArgs; ++I) {
      auto Arg = getPlacementArgs()[I];
      DeleteArgs.add(Traits::get(CGF, Arg.ArgValue), Arg.ArgType);
    }

    // Call 'operator delete'.
    EmitNewDeleteCall(CGF, OperatorDelete, FPT, DeleteArgs);
  }
};
1477}

1479/// Enter a cleanup to call 'operator delete' if the initializer in a
1480/// new-expression throws.
1481static void EnterNewDeleteCleanup(CodeGenFunction &CGF,
                                const CXXNewExpr *E,
                                Address NewPtr,
                                llvm::Value *AllocSize,
                                CharUnits AllocAlign,
                                const CallArgList &NewArgs) {
unsigned NumNonPlacementArgs = E->passAlignment() ? 2 : 1;

// If we're not inside a conditional branch, then the cleanup will
// dominate and we can do the easier (and more efficient) thing.
if (!CGF.isInConditionalBranch()) {
  struct DirectCleanupTraits {
    typedef llvm::Value *ValueTy;
    typedef RValue RValueTy;
    static RValue get(CodeGenFunction &, ValueTy V) { return RValue::get(V); }
    static RValue get(CodeGenFunction &, RValueTy V) { return V; }
  };

  typedef CallDeleteDuringNew<DirectCleanupTraits> DirectCleanup;

  DirectCleanup *Cleanup = CGF.EHStack
    .pushCleanupWithExtra<DirectCleanup>(EHCleanup,
                                         E->getNumPlacementArgs(),
                                         E->getOperatorDelete(),
                                         NewPtr.getPointer(),
                                         AllocSize,
                                         E->passAlignment(),
                                         AllocAlign);
  for (unsigned I = 0, N = E->getNumPlacementArgs(); I != N; ++I) {
    auto &Arg = NewArgs[I + NumNonPlacementArgs];
    Cleanup->setPlacementArg(I, Arg.getRValue(CGF), Arg.Ty);
  }

  return;
}

// Otherwise, we need to save all this stuff.
DominatingValue<RValue>::saved_type SavedNewPtr =
  DominatingValue<RValue>::save(CGF, RValue::get(NewPtr.getPointer()));
DominatingValue<RValue>::saved_type SavedAllocSize =
  DominatingValue<RValue>::save(CGF, RValue::get(AllocSize));

struct ConditionalCleanupTraits {
  typedef DominatingValue<RValue>::saved_type ValueTy;
  typedef DominatingValue<RValue>::saved_type RValueTy;
  static RValue get(CodeGenFunction &CGF, ValueTy V) {
    return V.restore(CGF);
  }
};
typedef CallDeleteDuringNew<ConditionalCleanupTraits> ConditionalCleanup;

ConditionalCleanup *Cleanup = CGF.EHStack
  .pushCleanupWithExtra<ConditionalCleanup>(EHCleanup,
                                            E->getNumPlacementArgs(),
                                            E->getOperatorDelete(),
                                            SavedNewPtr,
                                            SavedAllocSize,
                                            E->passAlignment(),
                                            AllocAlign);
for (unsigned I = 0, N = E->getNumPlacementArgs(); I != N; ++I) {
  auto &Arg = NewArgs[I + NumNonPlacementArgs];
  Cleanup->setPlacementArg(
      I, DominatingValue<RValue>::save(CGF, Arg.getRValue(CGF)), Arg.Ty);
}

CGF.initFullExprCleanup();
1547}

1549llvm::Value *CodeGenFunction::EmitCXXNewExpr(const CXXNewExpr *E) {
// The element type being allocated.
QualType allocType = getContext().getBaseElementType(E->getAllocatedType());

// 1. Build a call to the allocation function.
FunctionDecl *allocator = E->getOperatorNew();

// If there is a brace-initializer, cannot allocate fewer elements than inits.
unsigned minElements = 0;
if (E->isArray() && E->hasInitializer()) {
  const InitListExpr *ILE = dyn_cast<InitListExpr>(E->getInitializer());
  if (ILE && ILE->isStringLiteralInit())
    minElements =
        cast<ConstantArrayType>(ILE->getType()->getAsArrayTypeUnsafe())
            ->getSize().getZExtValue();
  else if (ILE)
    minElements = ILE->getNumInits();
}

llvm::Value *numElements = nullptr;
llvm::Value *allocSizeWithoutCookie = nullptr;
llvm::Value *allocSize =
  EmitCXXNewAllocSize(*this, E, minElements, numElements,
                      allocSizeWithoutCookie);
CharUnits allocAlign = getContext().getTypeAlignInChars(allocType);

// Emit the allocation call.  If the allocator is a global placement
// operator, just "inline" it directly.
Address allocation = Address::invalid();
CallArgList allocatorArgs;
if (allocator->isReservedGlobalPlacementOperator()) {
  assert(E->getNumPlacementArgs() == 1)((E->getNumPlacementArgs() == 1) ? static_cast<void>
 (0) : __assert_fail ("E->getNumPlacementArgs() == 1", "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 1580, __PRETTY_FUNCTION__));
  const Expr *arg = *E->placement_arguments().begin();

  LValueBaseInfo BaseInfo;
  allocation = EmitPointerWithAlignment(arg, &BaseInfo);

  // The pointer expression will, in many cases, be an opaque void*.
  // In these cases, discard the computed alignment and use the
  // formal alignment of the allocated type.
  if (BaseInfo.getAlignmentSource() != AlignmentSource::Decl)
    allocation = Address(allocation.getPointer(), allocAlign);

  // Set up allocatorArgs for the call to operator delete if it's not
  // the reserved global operator.
  if (E->getOperatorDelete() &&
      !E->getOperatorDelete()->isReservedGlobalPlacementOperator()) {
    allocatorArgs.add(RValue::get(allocSize), getContext().getSizeType());
    allocatorArgs.add(RValue::get(allocation.getPointer()), arg->getType());
  }

} else {
  const FunctionProtoType *allocatorType =
    allocator->getType()->castAs<FunctionProtoType>();
  unsigned ParamsToSkip = 0;

  // The allocation size is the first argument.
  QualType sizeType = getContext().getSizeType();
  allocatorArgs.add(RValue::get(allocSize), sizeType);
  ++ParamsToSkip;

  if (allocSize != allocSizeWithoutCookie) {
    CharUnits cookieAlign = getSizeAlign(); // FIXME: Ask the ABI.
    allocAlign = std::max(allocAlign, cookieAlign);
  }

  // The allocation alignment may be passed as the second argument.
  if (E->passAlignment()) {
    QualType AlignValT = sizeType;
    if (allocatorType->getNumParams() > 1) {
      AlignValT = allocatorType->getParamType(1);
      assert(getContext().hasSameUnqualifiedType(((getContext().hasSameUnqualifiedType( AlignValT->castAs<
EnumType>()->getDecl()->getIntegerType(), sizeType) &&
 "wrong type for alignment parameter") ? static_cast<void>
 (0) : __assert_fail ("getContext().hasSameUnqualifiedType( AlignValT->castAs<EnumType>()->getDecl()->getIntegerType(), sizeType) && \"wrong type for alignment parameter\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 1623, __PRETTY_FUNCTION__))
                 AlignValT->castAs<EnumType>()->getDecl()->getIntegerType(),((getContext().hasSameUnqualifiedType( AlignValT->castAs<
EnumType>()->getDecl()->getIntegerType(), sizeType) &&
 "wrong type for alignment parameter") ? static_cast<void>
 (0) : __assert_fail ("getContext().hasSameUnqualifiedType( AlignValT->castAs<EnumType>()->getDecl()->getIntegerType(), sizeType) && \"wrong type for alignment parameter\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 1623, __PRETTY_FUNCTION__))
                 sizeType) &&((getContext().hasSameUnqualifiedType( AlignValT->castAs<
EnumType>()->getDecl()->getIntegerType(), sizeType) &&
 "wrong type for alignment parameter") ? static_cast<void>
 (0) : __assert_fail ("getContext().hasSameUnqualifiedType( AlignValT->castAs<EnumType>()->getDecl()->getIntegerType(), sizeType) && \"wrong type for alignment parameter\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 1623, __PRETTY_FUNCTION__))
             "wrong type for alignment parameter")((getContext().hasSameUnqualifiedType( AlignValT->castAs<
EnumType>()->getDecl()->getIntegerType(), sizeType) &&
 "wrong type for alignment parameter") ? static_cast<void>
 (0) : __assert_fail ("getContext().hasSameUnqualifiedType( AlignValT->castAs<EnumType>()->getDecl()->getIntegerType(), sizeType) && \"wrong type for alignment parameter\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 1623, __PRETTY_FUNCTION__));
      ++ParamsToSkip;
    } else {
      // Corner case, passing alignment to 'operator new(size_t, ...)'.
      assert(allocator->isVariadic() && "can't pass alignment to allocator")((allocator->isVariadic() && "can't pass alignment to allocator"
) ? static_cast<void> (0) : __assert_fail ("allocator->isVariadic() && \"can't pass alignment to allocator\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 1627, __PRETTY_FUNCTION__));
    }
    allocatorArgs.add(
        RValue::get(llvm::ConstantInt::get(SizeTy, allocAlign.getQuantity())),
        AlignValT);
  }

  // FIXME: Why do we not pass a CalleeDecl here?
  EmitCallArgs(allocatorArgs, allocatorType, E->placement_arguments(),
               /*AC*/AbstractCallee(), /*ParamsToSkip*/ParamsToSkip);

  RValue RV =
    EmitNewDeleteCall(*this, allocator, allocatorType, allocatorArgs);

  // If this was a call to a global replaceable allocation function that does
  // not take an alignment argument, the allocator is known to produce
  // storage that's suitably aligned for any object that fits, up to a known
  // threshold. Otherwise assume it's suitably aligned for the allocated type.
  CharUnits allocationAlign = allocAlign;
  if (!E->passAlignment() &&
      allocator->isReplaceableGlobalAllocationFunction()) {
    unsigned AllocatorAlign = llvm::PowerOf2Floor(std::min<uint64_t>(
        Target.getNewAlign(), getContext().getTypeSize(allocType)));
    allocationAlign = std::max(
        allocationAlign, getContext().toCharUnitsFromBits(AllocatorAlign));
  }

  allocation = Address(RV.getScalarVal(), allocationAlign);
}

// Emit a null check on the allocation result if the allocation
// function is allowed to return null (because it has a non-throwing
// exception spec or is the reserved placement new) and we have an
// interesting initializer will be running sanitizers on the initialization.
bool nullCheck = E->shouldNullCheckAllocation() &&
                 (!allocType.isPODType(getContext()) || E->hasInitializer() ||
                  sanitizePerformTypeCheck());

llvm::BasicBlock *nullCheckBB = nullptr;
llvm::BasicBlock *contBB = nullptr;

// The null-check means that the initializer is conditionally
// evaluated.
ConditionalEvaluation conditional(*this);

if (nullCheck) {
  conditional.begin(*this);

  nullCheckBB = Builder.GetInsertBlock();
  llvm::BasicBlock *notNullBB = createBasicBlock("new.notnull");
  contBB = createBasicBlock("new.cont");

  llvm::Value *isNull =
    Builder.CreateIsNull(allocation.getPointer(), "new.isnull");
  Builder.CreateCondBr(isNull, contBB, notNullBB);
  EmitBlock(notNullBB);
}

// If there's an operator delete, enter a cleanup to call it if an
// exception is thrown.
EHScopeStack::stable_iterator operatorDeleteCleanup;
llvm::Instruction *cleanupDominator = nullptr;
if (E->getOperatorDelete() &&
    !E->getOperatorDelete()->isReservedGlobalPlacementOperator()) {
  EnterNewDeleteCleanup(*this, E, allocation, allocSize, allocAlign,
                        allocatorArgs);
  operatorDeleteCleanup = EHStack.stable_begin();
  cleanupDominator = Builder.CreateUnreachable();
}

assert((allocSize == allocSizeWithoutCookie) ==(((allocSize == allocSizeWithoutCookie) == CalculateCookiePadding
(*this, E).isZero()) ? static_cast<void> (0) : __assert_fail
 ("(allocSize == allocSizeWithoutCookie) == CalculateCookiePadding(*this, E).isZero()"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 1698, __PRETTY_FUNCTION__))
       CalculateCookiePadding(*this, E).isZero())(((allocSize == allocSizeWithoutCookie) == CalculateCookiePadding
(*this, E).isZero()) ? static_cast<void> (0) : __assert_fail
 ("(allocSize == allocSizeWithoutCookie) == CalculateCookiePadding(*this, E).isZero()"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 1698, __PRETTY_FUNCTION__));
if (allocSize != allocSizeWithoutCookie) {
  assert(E->isArray())((E->isArray()) ? static_cast<void> (0) : __assert_fail
 ("E->isArray()", "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 1700, __PRETTY_FUNCTION__));
  allocation = CGM.getCXXABI().InitializeArrayCookie(*this, allocation,
                                                     numElements,
                                                     E, allocType);
}

llvm::Type *elementTy = ConvertTypeForMem(allocType);
Address result = Builder.CreateElementBitCast(allocation, elementTy);

// Passing pointer through launder.invariant.group to avoid propagation of
// vptrs information which may be included in previous type.
// To not break LTO with different optimizations levels, we do it regardless
// of optimization level.
if (CGM.getCodeGenOpts().StrictVTablePointers &&
    allocator->isReservedGlobalPlacementOperator())
  result = Address(Builder.CreateLaunderInvariantGroup(result.getPointer()),
                   result.getAlignment());

// Emit sanitizer checks for pointer value now, so that in the case of an
// array it was checked only once and not at each constructor call. We may
// have already checked that the pointer is non-null.
// FIXME: If we have an array cookie and a potentially-throwing allocator,
// we'll null check the wrong pointer here.
SanitizerSet SkippedChecks;
SkippedChecks.set(SanitizerKind::Null, nullCheck);
EmitTypeCheck(CodeGenFunction::TCK_ConstructorCall,
              E->getAllocatedTypeSourceInfo()->getTypeLoc().getBeginLoc(),
              result.getPointer(), allocType, result.getAlignment(),
              SkippedChecks, numElements);

EmitNewInitializer(*this, E, allocType, elementTy, result, numElements,
                   allocSizeWithoutCookie);
if (E->isArray()) {
  // NewPtr is a pointer to the base element type.  If we're
  // allocating an array of arrays, we'll need to cast back to the
  // array pointer type.
  llvm::Type *resultType = ConvertTypeForMem(E->getType());
  if (result.getType() != resultType)
    result = Builder.CreateBitCast(result, resultType);
}

// Deactivate the 'operator delete' cleanup if we finished
// initialization.
if (operatorDeleteCleanup.isValid()) {
  DeactivateCleanupBlock(operatorDeleteCleanup, cleanupDominator);
  cleanupDominator->eraseFromParent();
}

llvm::Value *resultPtr = result.getPointer();
if (nullCheck) {
  conditional.end(*this);

  llvm::BasicBlock *notNullBB = Builder.GetInsertBlock();
  EmitBlock(contBB);

  llvm::PHINode *PHI = Builder.CreatePHI(resultPtr->getType(), 2);
  PHI->addIncoming(resultPtr, notNullBB);
  PHI->addIncoming(llvm::Constant::getNullValue(resultPtr->getType()),
                   nullCheckBB);

  resultPtr = PHI;
}

return resultPtr;
1764}

1766void CodeGenFunction::EmitDeleteCall(const FunctionDecl *DeleteFD,
                                   llvm::Value *Ptr, QualType DeleteTy,
                                   llvm::Value *NumElements,
                                   CharUnits CookieSize) {
assert((!NumElements && CookieSize.isZero()) ||(((!NumElements && CookieSize.isZero()) || DeleteFD->
getOverloadedOperator() == OO_Array_Delete) ? static_cast<
void> (0) : __assert_fail ("(!NumElements && CookieSize.isZero()) || DeleteFD->getOverloadedOperator() == OO_Array_Delete"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 1771, __PRETTY_FUNCTION__))
       DeleteFD->getOverloadedOperator() == OO_Array_Delete)(((!NumElements && CookieSize.isZero()) || DeleteFD->
getOverloadedOperator() == OO_Array_Delete) ? static_cast<
void> (0) : __assert_fail ("(!NumElements && CookieSize.isZero()) || DeleteFD->getOverloadedOperator() == OO_Array_Delete"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 1771, __PRETTY_FUNCTION__));

const FunctionProtoType *DeleteFTy =
  DeleteFD->getType()->getAs<FunctionProtoType>();

CallArgList DeleteArgs;

auto Params = getUsualDeleteParams(DeleteFD);
auto ParamTypeIt = DeleteFTy->param_type_begin();

// Pass the pointer itself.
QualType ArgTy = *ParamTypeIt++;
llvm::Value *DeletePtr = Builder.CreateBitCast(Ptr, ConvertType(ArgTy));
DeleteArgs.add(RValue::get(DeletePtr), ArgTy);

// Pass the std::destroying_delete tag if present.
if (Params.DestroyingDelete) {
  QualType DDTag = *ParamTypeIt++;
  // Just pass an 'undef'. We expect the tag type to be an empty struct.
  auto *V = llvm::UndefValue::get(getTypes().ConvertType(DDTag));
  DeleteArgs.add(RValue::get(V), DDTag);
}

// Pass the size if the delete function has a size_t parameter.
if (Params.Size) {
  QualType SizeType = *ParamTypeIt++;
  CharUnits DeleteTypeSize = getContext().getTypeSizeInChars(DeleteTy);
  llvm::Value *Size = llvm::ConstantInt::get(ConvertType(SizeType),
                                             DeleteTypeSize.getQuantity());

  // For array new, multiply by the number of elements.
  if (NumElements)
    Size = Builder.CreateMul(Size, NumElements);

  // If there is a cookie, add the cookie size.
  if (!CookieSize.isZero())
    Size = Builder.CreateAdd(
        Size, llvm::ConstantInt::get(SizeTy, CookieSize.getQuantity()));

  DeleteArgs.add(RValue::get(Size), SizeType);
}

// Pass the alignment if the delete function has an align_val_t parameter.
if (Params.Alignment) {
  QualType AlignValType = *ParamTypeIt++;
  CharUnits DeleteTypeAlign = getContext().toCharUnitsFromBits(
      getContext().getTypeAlignIfKnown(DeleteTy));
  llvm::Value *Align = llvm::ConstantInt::get(ConvertType(AlignValType),
                                              DeleteTypeAlign.getQuantity());
  DeleteArgs.add(RValue::get(Align), AlignValType);
}

assert(ParamTypeIt == DeleteFTy->param_type_end() &&((ParamTypeIt == DeleteFTy->param_type_end() && "unknown parameter to usual delete function"
) ? static_cast<void> (0) : __assert_fail ("ParamTypeIt == DeleteFTy->param_type_end() && \"unknown parameter to usual delete function\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 1824, __PRETTY_FUNCTION__))
       "unknown parameter to usual delete function")((ParamTypeIt == DeleteFTy->param_type_end() && "unknown parameter to usual delete function"
) ? static_cast<void> (0) : __assert_fail ("ParamTypeIt == DeleteFTy->param_type_end() && \"unknown parameter to usual delete function\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 1824, __PRETTY_FUNCTION__));

// Emit the call to delete.
EmitNewDeleteCall(*this, DeleteFD, DeleteFTy, DeleteArgs);
1828}

1830namespace {
/// Calls the given 'operator delete' on a single object.
struct CallObjectDelete final : EHScopeStack::Cleanup {
  llvm::Value *Ptr;
  const FunctionDecl *OperatorDelete;
  QualType ElementType;

  CallObjectDelete(llvm::Value *Ptr,
                   const FunctionDecl *OperatorDelete,
                   QualType ElementType)
    : Ptr(Ptr), OperatorDelete(OperatorDelete), ElementType(ElementType) {}

  void Emit(CodeGenFunction &CGF, Flags flags) override {
    CGF.EmitDeleteCall(OperatorDelete, Ptr, ElementType);
  }
};
1846}

1848void
1849CodeGenFunction::pushCallObjectDeleteCleanup(const FunctionDecl *OperatorDelete,
                                           llvm::Value *CompletePtr,
                                           QualType ElementType) {
EHStack.pushCleanup<CallObjectDelete>(NormalAndEHCleanup, CompletePtr,
                                      OperatorDelete, ElementType);
1854}

1856/// Emit the code for deleting a single object with a destroying operator
1857/// delete. If the element type has a non-virtual destructor, Ptr has already
1858/// been converted to the type of the parameter of 'operator delete'. Otherwise
1859/// Ptr points to an object of the static type.
1860static void EmitDestroyingObjectDelete(CodeGenFunction &CGF,
                                     const CXXDeleteExpr *DE, Address Ptr,
                                     QualType ElementType) {
auto *Dtor = ElementType->getAsCXXRecordDecl()->getDestructor();
if (Dtor && Dtor->isVirtual())
  CGF.CGM.getCXXABI().emitVirtualObjectDelete(CGF, DE, Ptr, ElementType,
                                              Dtor);
else
  CGF.EmitDeleteCall(DE->getOperatorDelete(), Ptr.getPointer(), ElementType);
1869}

1871/// Emit the code for deleting a single object.
1872static void EmitObjectDelete(CodeGenFunction &CGF,
                           const CXXDeleteExpr *DE,
                           Address Ptr,
                           QualType ElementType) {
// C++11 [expr.delete]p3:
//   If the static type of the object to be deleted is different from its
//   dynamic type, the static type shall be a base class of the dynamic type
//   of the object to be deleted and the static type shall have a virtual
//   destructor or the behavior is undefined.
CGF.EmitTypeCheck(CodeGenFunction::TCK_MemberCall,
                  DE->getExprLoc(), Ptr.getPointer(),
                  ElementType);

const FunctionDecl *OperatorDelete = DE->getOperatorDelete();
assert(!OperatorDelete->isDestroyingOperatorDelete())((!OperatorDelete->isDestroyingOperatorDelete()) ? static_cast
<void> (0) : __assert_fail ("!OperatorDelete->isDestroyingOperatorDelete()"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 1886, __PRETTY_FUNCTION__));

// Find the destructor for the type, if applicable.  If the
// destructor is virtual, we'll just emit the vcall and return.
const CXXDestructorDecl *Dtor = nullptr;
if (const RecordType *RT = ElementType->getAs<RecordType>()) {
  CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl());
  if (RD->hasDefinition() && !RD->hasTrivialDestructor()) {
    Dtor = RD->getDestructor();

    if (Dtor->isVirtual()) {
      bool UseVirtualCall = true;
      const Expr *Base = DE->getArgument();
      if (auto *DevirtualizedDtor =
              dyn_cast_or_null<const CXXDestructorDecl>(
                  Dtor->getDevirtualizedMethod(
                      Base, CGF.CGM.getLangOpts().AppleKext))) {
        UseVirtualCall = false;
        const CXXRecordDecl *DevirtualizedClass =
            DevirtualizedDtor->getParent();
        if (declaresSameEntity(getCXXRecord(Base), DevirtualizedClass)) {
          // Devirtualized to the class of the base type (the type of the
          // whole expression).
          Dtor = DevirtualizedDtor;
        } else {
          // Devirtualized to some other type. Would need to cast the this
          // pointer to that type but we don't have support for that yet, so
          // do a virtual call. FIXME: handle the case where it is
          // devirtualized to the derived type (the type of the inner
          // expression) as in EmitCXXMemberOrOperatorMemberCallExpr.
          UseVirtualCall = true;
        }
      }
      if (UseVirtualCall) {
        CGF.CGM.getCXXABI().emitVirtualObjectDelete(CGF, DE, Ptr, ElementType,
                                                    Dtor);
        return;
      }
    }
  }
}

// Make sure that we call delete even if the dtor throws.
// This doesn't have to a conditional cleanup because we're going
// to pop it off in a second.
CGF.EHStack.pushCleanup<CallObjectDelete>(NormalAndEHCleanup,
                                          Ptr.getPointer(),
                                          OperatorDelete, ElementType);

if (Dtor)
  CGF.EmitCXXDestructorCall(Dtor, Dtor_Complete,
                            /*ForVirtualBase=*/false,
                            /*Delegating=*/false,
                            Ptr, ElementType);
else if (auto Lifetime = ElementType.getObjCLifetime()) {
  switch (Lifetime) {
  case Qualifiers::OCL_None:
  case Qualifiers::OCL_ExplicitNone:
  case Qualifiers::OCL_Autoreleasing:
    break;

  case Qualifiers::OCL_Strong:
    CGF.EmitARCDestroyStrong(Ptr, ARCPreciseLifetime);
    break;

  case Qualifiers::OCL_Weak:
    CGF.EmitARCDestroyWeak(Ptr);
    break;
  }
}

CGF.PopCleanupBlock();
1958}

1960namespace {
/// Calls the given 'operator delete' on an array of objects.
struct CallArrayDelete final : EHScopeStack::Cleanup {
  llvm::Value *Ptr;
  const FunctionDecl *OperatorDelete;
  llvm::Value *NumElements;
  QualType ElementType;
  CharUnits CookieSize;

  CallArrayDelete(llvm::Value *Ptr,
                  const FunctionDecl *OperatorDelete,
                  llvm::Value *NumElements,
                  QualType ElementType,
                  CharUnits CookieSize)
    : Ptr(Ptr), OperatorDelete(OperatorDelete), NumElements(NumElements),
      ElementType(ElementType), CookieSize(CookieSize) {}

  void Emit(CodeGenFunction &CGF, Flags flags) override {
    CGF.EmitDeleteCall(OperatorDelete, Ptr, ElementType, NumElements,
                       CookieSize);
  }
};
1982}

1984/// Emit the code for deleting an array of objects.
1985static void EmitArrayDelete(CodeGenFunction &CGF,
                          const CXXDeleteExpr *E,
                          Address deletedPtr,
                          QualType elementType) {
llvm::Value *numElements = nullptr;
llvm::Value *allocatedPtr = nullptr;
CharUnits cookieSize;
CGF.CGM.getCXXABI().ReadArrayCookie(CGF, deletedPtr, E, elementType,
                                    numElements, allocatedPtr, cookieSize);

assert(allocatedPtr && "ReadArrayCookie didn't set allocated pointer")((allocatedPtr && "ReadArrayCookie didn't set allocated pointer"
) ? static_cast<void> (0) : __assert_fail ("allocatedPtr && \"ReadArrayCookie didn't set allocated pointer\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 1995, __PRETTY_FUNCTION__));

// Make sure that we call delete even if one of the dtors throws.
const FunctionDecl *operatorDelete = E->getOperatorDelete();
CGF.EHStack.pushCleanup<CallArrayDelete>(NormalAndEHCleanup,
                                         allocatedPtr, operatorDelete,
                                         numElements, elementType,
                                         cookieSize);

// Destroy the elements.
if (QualType::DestructionKind dtorKind = elementType.isDestructedType()) {
  assert(numElements && "no element count for a type with a destructor!")((numElements && "no element count for a type with a destructor!"
) ? static_cast<void> (0) : __assert_fail ("numElements && \"no element count for a type with a destructor!\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 2006, __PRETTY_FUNCTION__));

  CharUnits elementSize = CGF.getContext().getTypeSizeInChars(elementType);
  CharUnits elementAlign =
    deletedPtr.getAlignment().alignmentOfArrayElement(elementSize);

  llvm::Value *arrayBegin = deletedPtr.getPointer();
  llvm::Value *arrayEnd =
    CGF.Builder.CreateInBoundsGEP(arrayBegin, numElements, "delete.end");

  // Note that it is legal to allocate a zero-length array, and we
  // can never fold the check away because the length should always
  // come from a cookie.
  CGF.emitArrayDestroy(arrayBegin, arrayEnd, elementType, elementAlign,
                       CGF.getDestroyer(dtorKind),
                       /*checkZeroLength*/ true,
                       CGF.needsEHCleanup(dtorKind));
}

// Pop the cleanup block.
CGF.PopCleanupBlock();
2027}

2029void CodeGenFunction::EmitCXXDeleteExpr(const CXXDeleteExpr *E) {
const Expr *Arg = E->getArgument();
Address Ptr = EmitPointerWithAlignment(Arg);

// Null check the pointer.
llvm::BasicBlock *DeleteNotNull = createBasicBlock("delete.notnull");
llvm::BasicBlock *DeleteEnd = createBasicBlock("delete.end");

llvm::Value *IsNull = Builder.CreateIsNull(Ptr.getPointer(), "isnull");

Builder.CreateCondBr(IsNull, DeleteEnd, DeleteNotNull);
EmitBlock(DeleteNotNull);

QualType DeleteTy = E->getDestroyedType();

// A destroying operator delete overrides the entire operation of the
// delete expression.
if (E->getOperatorDelete()->isDestroyingOperatorDelete()) {
  EmitDestroyingObjectDelete(*this, E, Ptr, DeleteTy);
  EmitBlock(DeleteEnd);
  return;
}

// We might be deleting a pointer to array.  If so, GEP down to the
// first non-array element.
// (this assumes that A(*)[3][7] is converted to [3 x [7 x %A]]*)
if (DeleteTy->isConstantArrayType()) {
  llvm::Value *Zero = Builder.getInt32(0);
  SmallVector<llvm::Value*,8> GEP;

  GEP.push_back(Zero); // point at the outermost array

  // For each layer of array type we're pointing at:
  while (const ConstantArrayType *Arr
           = getContext().getAsConstantArrayType(DeleteTy)) {
    // 1. Unpeel the array type.
    DeleteTy = Arr->getElementType();

    // 2. GEP to the first element of the array.
    GEP.push_back(Zero);
  }

  Ptr = Address(Builder.CreateInBoundsGEP(Ptr.getPointer(), GEP, "del.first"),
                Ptr.getAlignment());
}

assert(ConvertTypeForMem(DeleteTy) == Ptr.getElementType())((ConvertTypeForMem(DeleteTy) == Ptr.getElementType()) ? static_cast
<void> (0) : __assert_fail ("ConvertTypeForMem(DeleteTy) == Ptr.getElementType()"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 2075, __PRETTY_FUNCTION__));

if (E->isArrayForm()) {
  EmitArrayDelete(*this, E, Ptr, DeleteTy);
} else {
  EmitObjectDelete(*this, E, Ptr, DeleteTy);
}

EmitBlock(DeleteEnd);
2084}

2086static bool isGLValueFromPointerDeref(const Expr *E) {
E = E->IgnoreParens();

if (const auto *CE = dyn_cast<CastExpr>(E)) {
  if (!CE->getSubExpr()->isGLValue())
    return false;
  return isGLValueFromPointerDeref(CE->getSubExpr());
}

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

if (const auto *BO = dyn_cast<BinaryOperator>(E))
  if (BO->getOpcode() == BO_Comma)
    return isGLValueFromPointerDeref(BO->getRHS());

if (const auto *ACO = dyn_cast<AbstractConditionalOperator>(E))
  return isGLValueFromPointerDeref(ACO->getTrueExpr()) ||
         isGLValueFromPointerDeref(ACO->getFalseExpr());

// C++11 [expr.sub]p1:
//   The expression E1[E2] is identical (by definition) to *((E1)+(E2))
if (isa<ArraySubscriptExpr>(E))
  return true;

if (const auto *UO = dyn_cast<UnaryOperator>(E))
  if (UO->getOpcode() == UO_Deref)
    return true;

return false;
2116}

2118static llvm::Value *EmitTypeidFromVTable(CodeGenFunction &CGF, const Expr *E,
                                       llvm::Type *StdTypeInfoPtrTy) {
// Get the vtable pointer.
Address ThisPtr = CGF.EmitLValue(E).getAddress(CGF);

QualType SrcRecordTy = E->getType();

// C++ [class.cdtor]p4:
//   If the operand of typeid refers to the object under construction or
//   destruction and the static type of the operand is neither the constructor
//   or destructor’s class nor one of its bases, the behavior is undefined.
CGF.EmitTypeCheck(CodeGenFunction::TCK_DynamicOperation, E->getExprLoc(),
                  ThisPtr.getPointer(), SrcRecordTy);

// C++ [expr.typeid]p2:
//   If the glvalue expression is obtained by applying the unary * operator to
//   a pointer and the pointer is a null pointer value, the typeid expression
//   throws the std::bad_typeid exception.
//
// However, this paragraph's intent is not clear.  We choose a very generous
// interpretation which implores us to consider comma operators, conditional
// operators, parentheses and other such constructs.
if (CGF.CGM.getCXXABI().shouldTypeidBeNullChecked(
        isGLValueFromPointerDeref(E), SrcRecordTy)) {
  llvm::BasicBlock *BadTypeidBlock =
      CGF.createBasicBlock("typeid.bad_typeid");
  llvm::BasicBlock *EndBlock = CGF.createBasicBlock("typeid.end");

  llvm::Value *IsNull = CGF.Builder.CreateIsNull(ThisPtr.getPointer());
  CGF.Builder.CreateCondBr(IsNull, BadTypeidBlock, EndBlock);

  CGF.EmitBlock(BadTypeidBlock);
  CGF.CGM.getCXXABI().EmitBadTypeidCall(CGF);
  CGF.EmitBlock(EndBlock);
}

return CGF.CGM.getCXXABI().EmitTypeid(CGF, SrcRecordTy, ThisPtr,
                                      StdTypeInfoPtrTy);
2156}

2158llvm::Value *CodeGenFunction::EmitCXXTypeidExpr(const CXXTypeidExpr *E) {
llvm::Type *StdTypeInfoPtrTy =
  ConvertType(E->getType())->getPointerTo();

if (E->isTypeOperand()) {
  llvm::Constant *TypeInfo =
      CGM.GetAddrOfRTTIDescriptor(E->getTypeOperand(getContext()));
  return Builder.CreateBitCast(TypeInfo, StdTypeInfoPtrTy);
}

// C++ [expr.typeid]p2:
//   When typeid is applied to a glvalue expression whose type is a
//   polymorphic class type, the result refers to a std::type_info object
//   representing the type of the most derived object (that is, the dynamic
//   type) to which the glvalue refers.
if (E->isPotentiallyEvaluated())
  return EmitTypeidFromVTable(*this, E->getExprOperand(),
                              StdTypeInfoPtrTy);

QualType OperandTy = E->getExprOperand()->getType();
return Builder.CreateBitCast(CGM.GetAddrOfRTTIDescriptor(OperandTy),
                             StdTypeInfoPtrTy);
2180}

2182static llvm::Value *EmitDynamicCastToNull(CodeGenFunction &CGF,
                                        QualType DestTy) {
llvm::Type *DestLTy = CGF.ConvertType(DestTy);
if (DestTy->isPointerType())
  return llvm::Constant::getNullValue(DestLTy);

/// C++ [expr.dynamic.cast]p9:
///   A failed cast to reference type throws std::bad_cast
if (!CGF.CGM.getCXXABI().EmitBadCastCall(CGF))
  return nullptr;

CGF.EmitBlock(CGF.createBasicBlock("dynamic_cast.end"));
return llvm::UndefValue::get(DestLTy);
2195}

2197llvm::Value *CodeGenFunction::EmitDynamicCast(Address ThisAddr,
                                            const CXXDynamicCastExpr *DCE) {
CGM.EmitExplicitCastExprType(DCE, this);
QualType DestTy = DCE->getTypeAsWritten();

QualType SrcTy = DCE->getSubExpr()->getType();

// C++ [expr.dynamic.cast]p7:
//   If T is "pointer to cv void," then the result is a pointer to the most
//   derived object pointed to by v.
const PointerType *DestPTy = DestTy->getAs<PointerType>();

bool isDynamicCastToVoid;
QualType SrcRecordTy;
QualType DestRecordTy;
if (DestPTy) {
  isDynamicCastToVoid = DestPTy->getPointeeType()->isVoidType();
  SrcRecordTy = SrcTy->castAs<PointerType>()->getPointeeType();
  DestRecordTy = DestPTy->getPointeeType();
} else {
  isDynamicCastToVoid = false;
  SrcRecordTy = SrcTy;
  DestRecordTy = DestTy->castAs<ReferenceType>()->getPointeeType();
}

// C++ [class.cdtor]p5:
//   If the operand of the dynamic_cast refers to the object under
//   construction or destruction and the static type of the operand is not a
//   pointer to or object of the constructor or destructor’s own class or one
//   of its bases, the dynamic_cast results in undefined behavior.
EmitTypeCheck(TCK_DynamicOperation, DCE->getExprLoc(), ThisAddr.getPointer(),
              SrcRecordTy);

if (DCE->isAlwaysNull())
  if (llvm::Value *T = EmitDynamicCastToNull(*this, DestTy))
    return T;

assert(SrcRecordTy->isRecordType() && "source type must be a record type!")((SrcRecordTy->isRecordType() && "source type must be a record type!"
) ? static_cast<void> (0) : __assert_fail ("SrcRecordTy->isRecordType() && \"source type must be a record type!\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 2234, __PRETTY_FUNCTION__));

// C++ [expr.dynamic.cast]p4:
//   If the value of v is a null pointer value in the pointer case, the result
//   is the null pointer value of type T.
bool ShouldNullCheckSrcValue =
    CGM.getCXXABI().shouldDynamicCastCallBeNullChecked(SrcTy->isPointerType(),
                                                       SrcRecordTy);

llvm::BasicBlock *CastNull = nullptr;
llvm::BasicBlock *CastNotNull = nullptr;
llvm::BasicBlock *CastEnd = createBasicBlock("dynamic_cast.end");

if (ShouldNullCheckSrcValue) {
  CastNull = createBasicBlock("dynamic_cast.null");
  CastNotNull = createBasicBlock("dynamic_cast.notnull");

  llvm::Value *IsNull = Builder.CreateIsNull(ThisAddr.getPointer());
  Builder.CreateCondBr(IsNull, CastNull, CastNotNull);
  EmitBlock(CastNotNull);
}

llvm::Value *Value;
if (isDynamicCastToVoid) {
  Value = CGM.getCXXABI().EmitDynamicCastToVoid(*this, ThisAddr, SrcRecordTy,
                                                DestTy);
} else {
  assert(DestRecordTy->isRecordType() &&((DestRecordTy->isRecordType() && "destination type must be a record type!"
) ? static_cast<void> (0) : __assert_fail ("DestRecordTy->isRecordType() && \"destination type must be a record type!\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 2262, __PRETTY_FUNCTION__))
         "destination type must be a record type!")((DestRecordTy->isRecordType() && "destination type must be a record type!"
) ? static_cast<void> (0) : __assert_fail ("DestRecordTy->isRecordType() && \"destination type must be a record type!\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/lib/CodeGen/CGExprCXX.cpp"
, 2262, __PRETTY_FUNCTION__));
  Value = CGM.getCXXABI().EmitDynamicCastCall(*this, ThisAddr, SrcRecordTy,
                                              DestTy, DestRecordTy, CastEnd);
  CastNotNull = Builder.GetInsertBlock();
}

if (ShouldNullCheckSrcValue) {
  EmitBranch(CastEnd);

  EmitBlock(CastNull);
  EmitBranch(CastEnd);
}

EmitBlock(CastEnd);

if (ShouldNullCheckSrcValue) {
  llvm::PHINode *PHI = Builder.CreatePHI(Value->getType(), 2);
  PHI->addIncoming(Value, CastNotNull);
  PHI->addIncoming(llvm::Constant::getNullValue(Value->getType()), CastNull);

  Value = PHI;
}

return Value;
2286}

←

/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h

1//===- Type.h - C Language Family Type Representation -----------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9/// \file
10/// C Language Family Type Representation
11///
12/// This file defines the clang::Type interface and subclasses, used to
13/// represent types for languages in the C family.
14//
15//===----------------------------------------------------------------------===//

17#ifndef LLVM_CLANG_AST_TYPE_H
18#define LLVM_CLANG_AST_TYPE_H

20#include "clang/AST/NestedNameSpecifier.h"
21#include "clang/AST/TemplateName.h"
22#include "clang/Basic/AddressSpaces.h"
23#include "clang/Basic/AttrKinds.h"
24#include "clang/Basic/Diagnostic.h"
25#include "clang/Basic/ExceptionSpecificationType.h"
26#include "clang/Basic/LLVM.h"
27#include "clang/Basic/Linkage.h"
28#include "clang/Basic/PartialDiagnostic.h"
29#include "clang/Basic/SourceLocation.h"
30#include "clang/Basic/Specifiers.h"
31#include "clang/Basic/Visibility.h"
32#include "llvm/ADT/APInt.h"
33#include "llvm/ADT/APSInt.h"
34#include "llvm/ADT/ArrayRef.h"
35#include "llvm/ADT/FoldingSet.h"
36#include "llvm/ADT/None.h"
37#include "llvm/ADT/Optional.h"
38#include "llvm/ADT/PointerIntPair.h"
39#include "llvm/ADT/PointerUnion.h"
40#include "llvm/ADT/StringRef.h"
41#include "llvm/ADT/Twine.h"
42#include "llvm/ADT/iterator_range.h"
43#include "llvm/Support/Casting.h"
44#include "llvm/Support/Compiler.h"
45#include "llvm/Support/ErrorHandling.h"
46#include "llvm/Support/PointerLikeTypeTraits.h"
47#include "llvm/Support/type_traits.h"
48#include "llvm/Support/TrailingObjects.h"
49#include <cassert>
50#include <cstddef>
51#include <cstdint>
52#include <cstring>
53#include <string>
54#include <type_traits>
55#include <utility>

57namespace clang {

59class ExtQuals;
60class QualType;
61class TagDecl;
62class Type;

64enum {
TypeAlignmentInBits = 4,
TypeAlignment = 1 << TypeAlignmentInBits
67};

69namespace serialization {
template <class T> class AbstractTypeReader;
template <class T> class AbstractTypeWriter;
72}

74} // namespace clang

76namespace llvm {

template <typename T>
struct PointerLikeTypeTraits;
template<>
struct PointerLikeTypeTraits< ::clang::Type*> {
  static inline void *getAsVoidPointer(::clang::Type *P) { return P; }

  static inline ::clang::Type *getFromVoidPointer(void *P) {
    return static_cast< ::clang::Type*>(P);
  }

  enum { NumLowBitsAvailable = clang::TypeAlignmentInBits };
};

template<>
struct PointerLikeTypeTraits< ::clang::ExtQuals*> {
  static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; }

  static inline ::clang::ExtQuals *getFromVoidPointer(void *P) {
    return static_cast< ::clang::ExtQuals*>(P);
  }

  enum { NumLowBitsAvailable = clang::TypeAlignmentInBits };
};

102} // namespace llvm

104namespace clang {

106class ASTContext;
107template <typename> class CanQual;
108class CXXRecordDecl;
109class DeclContext;
110class EnumDecl;
111class Expr;
112class ExtQualsTypeCommonBase;
113class FunctionDecl;
114class IdentifierInfo;
115class NamedDecl;
116class ObjCInterfaceDecl;
117class ObjCProtocolDecl;
118class ObjCTypeParamDecl;
119struct PrintingPolicy;
120class RecordDecl;
121class Stmt;
122class TagDecl;
123class TemplateArgument;
124class TemplateArgumentListInfo;
125class TemplateArgumentLoc;
126class TemplateTypeParmDecl;
127class TypedefNameDecl;
128class UnresolvedUsingTypenameDecl;

130using CanQualType = CanQual<Type>;

132// Provide forward declarations for all of the *Type classes.
133#define TYPE(Class, Base) class Class##Type;
134#include "clang/AST/TypeNodes.inc"

136/// The collection of all-type qualifiers we support.
137/// Clang supports five independent qualifiers:
138/// * C99: const, volatile, and restrict
139/// * MS: __unaligned
140/// * Embedded C (TR18037): address spaces
141/// * Objective C: the GC attributes (none, weak, or strong)
142class Qualifiers {
143public:
enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ.
  Const    = 0x1,
  Restrict = 0x2,
  Volatile = 0x4,
  CVRMask = Const | Volatile | Restrict
};

enum GC {
  GCNone = 0,
  Weak,
  Strong
};

enum ObjCLifetime {
  /// There is no lifetime qualification on this type.
  OCL_None,

  /// This object can be modified without requiring retains or
  /// releases.
  OCL_ExplicitNone,

  /// Assigning into this object requires the old value to be
  /// released and the new value to be retained.  The timing of the
  /// release of the old value is inexact: it may be moved to
  /// immediately after the last known point where the value is
  /// live.
  OCL_Strong,

  /// Reading or writing from this object requires a barrier call.
  OCL_Weak,

  /// Assigning into this object requires a lifetime extension.
  OCL_Autoreleasing
};

enum {
  /// The maximum supported address space number.
  /// 23 bits should be enough for anyone.
  MaxAddressSpace = 0x7fffffu,

  /// The width of the "fast" qualifier mask.
  FastWidth = 3,

  /// The fast qualifier mask.
  FastMask = (1 << FastWidth) - 1
};

/// Returns the common set of qualifiers while removing them from
/// the given sets.
static Qualifiers removeCommonQualifiers(Qualifiers &L, Qualifiers &R) {
  // If both are only CVR-qualified, bit operations are sufficient.
  if (!(L.Mask & ~CVRMask) && !(R.Mask & ~CVRMask)) {
    Qualifiers Q;
    Q.Mask = L.Mask & R.Mask;
    L.Mask &= ~Q.Mask;
    R.Mask &= ~Q.Mask;
    return Q;
  }

  Qualifiers Q;
  unsigned CommonCRV = L.getCVRQualifiers() & R.getCVRQualifiers();
  Q.addCVRQualifiers(CommonCRV);
  L.removeCVRQualifiers(CommonCRV);
  R.removeCVRQualifiers(CommonCRV);

  if (L.getObjCGCAttr() == R.getObjCGCAttr()) {
    Q.setObjCGCAttr(L.getObjCGCAttr());
    L.removeObjCGCAttr();
    R.removeObjCGCAttr();
  }

  if (L.getObjCLifetime() == R.getObjCLifetime()) {
    Q.setObjCLifetime(L.getObjCLifetime());
    L.removeObjCLifetime();
    R.removeObjCLifetime();
  }

  if (L.getAddressSpace() == R.getAddressSpace()) {
    Q.setAddressSpace(L.getAddressSpace());
    L.removeAddressSpace();
    R.removeAddressSpace();
  }
  return Q;
}

static Qualifiers fromFastMask(unsigned Mask) {
  Qualifiers Qs;
  Qs.addFastQualifiers(Mask);
  return Qs;
}

static Qualifiers fromCVRMask(unsigned CVR) {
  Qualifiers Qs;
  Qs.addCVRQualifiers(CVR);
  return Qs;
}

static Qualifiers fromCVRUMask(unsigned CVRU) {
  Qualifiers Qs;
  Qs.addCVRUQualifiers(CVRU);
  return Qs;
}

// Deserialize qualifiers from an opaque representation.
static Qualifiers fromOpaqueValue(unsigned opaque) {
  Qualifiers Qs;
  Qs.Mask = opaque;
  return Qs;
}

// Serialize these qualifiers into an opaque representation.
unsigned getAsOpaqueValue() const {
  return Mask;
}

bool hasConst() const { return Mask & Const; }
bool hasOnlyConst() const { return Mask == Const; }
void removeConst() { Mask &= ~Const; }
void addConst() { Mask |= Const; }

bool hasVolatile() const { return Mask & Volatile; }
bool hasOnlyVolatile() const { return Mask == Volatile; }
void removeVolatile() { Mask &= ~Volatile; }
void addVolatile() { Mask |= Volatile; }

bool hasRestrict() const { return Mask & Restrict; }
bool hasOnlyRestrict() const { return Mask == Restrict; }
void removeRestrict() { Mask &= ~Restrict; }
void addRestrict() { Mask |= Restrict; }

bool hasCVRQualifiers() const { return getCVRQualifiers(); }
unsigned getCVRQualifiers() const { return Mask & CVRMask; }
unsigned getCVRUQualifiers() const { return Mask & (CVRMask | UMask); }

void setCVRQualifiers(unsigned mask) {
  assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")((!(mask & ~CVRMask) && "bitmask contains non-CVR bits"
) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 279, __PRETTY_FUNCTION__));
  Mask = (Mask & ~CVRMask) | mask;
}
void removeCVRQualifiers(unsigned mask) {
  assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")((!(mask & ~CVRMask) && "bitmask contains non-CVR bits"
) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 283, __PRETTY_FUNCTION__));
  Mask &= ~mask;
}
void removeCVRQualifiers() {
  removeCVRQualifiers(CVRMask);
}
void addCVRQualifiers(unsigned mask) {
  assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")((!(mask & ~CVRMask) && "bitmask contains non-CVR bits"
) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 290, __PRETTY_FUNCTION__));
  Mask |= mask;
}
void addCVRUQualifiers(unsigned mask) {
  assert(!(mask & ~CVRMask & ~UMask) && "bitmask contains non-CVRU bits")((!(mask & ~CVRMask & ~UMask) && "bitmask contains non-CVRU bits"
) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask & ~UMask) && \"bitmask contains non-CVRU bits\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 294, __PRETTY_FUNCTION__));
  Mask |= mask;
}

bool hasUnaligned() const { return Mask & UMask; }
void setUnaligned(bool flag) {
  Mask = (Mask & ~UMask) | (flag ? UMask : 0);
}
void removeUnaligned() { Mask &= ~UMask; }
void addUnaligned() { Mask |= UMask; }

bool hasObjCGCAttr() const { return Mask & GCAttrMask; }
GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); }
void setObjCGCAttr(GC type) {
  Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift);
}
void removeObjCGCAttr() { setObjCGCAttr(GCNone); }
void addObjCGCAttr(GC type) {
  assert(type)((type) ? static_cast<void> (0) : __assert_fail ("type"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 312, __PRETTY_FUNCTION__));
  setObjCGCAttr(type);
}
Qualifiers withoutObjCGCAttr() const {
  Qualifiers qs = *this;
  qs.removeObjCGCAttr();
  return qs;
}
Qualifiers withoutObjCLifetime() const {
  Qualifiers qs = *this;
  qs.removeObjCLifetime();
  return qs;
}
Qualifiers withoutAddressSpace() const {
  Qualifiers qs = *this;
  qs.removeAddressSpace();
  return qs;
}

bool hasObjCLifetime() const { return Mask & LifetimeMask; }
ObjCLifetime getObjCLifetime() const {
  return ObjCLifetime((Mask & LifetimeMask) >> LifetimeShift);
}
void setObjCLifetime(ObjCLifetime type) {
  Mask = (Mask & ~LifetimeMask) | (type << LifetimeShift);
}
void removeObjCLifetime() { setObjCLifetime(OCL_None); }
void addObjCLifetime(ObjCLifetime type) {
  assert(type)((type) ? static_cast<void> (0) : __assert_fail ("type"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 340, __PRETTY_FUNCTION__));
  assert(!hasObjCLifetime())((!hasObjCLifetime()) ? static_cast<void> (0) : __assert_fail
 ("!hasObjCLifetime()", "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 341, __PRETTY_FUNCTION__));
  Mask |= (type << LifetimeShift);
}

/// True if the lifetime is neither None or ExplicitNone.
bool hasNonTrivialObjCLifetime() const {
  ObjCLifetime lifetime = getObjCLifetime();
  return (lifetime > OCL_ExplicitNone);
}

/// True if the lifetime is either strong or weak.
bool hasStrongOrWeakObjCLifetime() const {
  ObjCLifetime lifetime = getObjCLifetime();
  return (lifetime == OCL_Strong || lifetime == OCL_Weak);
3
←
Assuming 'lifetime' is equal to OCL_Strong→
4
←
Returning the value 1, which participates in a condition later→
}

bool hasAddressSpace() const { return Mask & AddressSpaceMask; }
LangAS getAddressSpace() const {
  return static_cast<LangAS>(Mask >> AddressSpaceShift);
}
bool hasTargetSpecificAddressSpace() const {
  return isTargetAddressSpace(getAddressSpace());
}
/// Get the address space attribute value to be printed by diagnostics.
unsigned getAddressSpaceAttributePrintValue() const {
  auto Addr = getAddressSpace();
  // This function is not supposed to be used with language specific
  // address spaces. If that happens, the diagnostic message should consider
  // printing the QualType instead of the address space value.
  assert(Addr == LangAS::Default || hasTargetSpecificAddressSpace())((Addr == LangAS::Default || hasTargetSpecificAddressSpace())
 ? static_cast<void> (0) : __assert_fail ("Addr == LangAS::Default || hasTargetSpecificAddressSpace()"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 370, __PRETTY_FUNCTION__));
  if (Addr != LangAS::Default)
    return toTargetAddressSpace(Addr);
  // TODO: The diagnostic messages where Addr may be 0 should be fixed
  // since it cannot differentiate the situation where 0 denotes the default
  // address space or user specified __attribute__((address_space(0))).
  return 0;
}
void setAddressSpace(LangAS space) {
  assert((unsigned)space <= MaxAddressSpace)(((unsigned)space <= MaxAddressSpace) ? static_cast<void
> (0) : __assert_fail ("(unsigned)space <= MaxAddressSpace"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 379, __PRETTY_FUNCTION__));
  Mask = (Mask & ~AddressSpaceMask)
       | (((uint32_t) space) << AddressSpaceShift);
}
void removeAddressSpace() { setAddressSpace(LangAS::Default); }
void addAddressSpace(LangAS space) {
  assert(space != LangAS::Default)((space != LangAS::Default) ? static_cast<void> (0) : __assert_fail
 ("space != LangAS::Default", "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 385, __PRETTY_FUNCTION__));
  setAddressSpace(space);
}

// Fast qualifiers are those that can be allocated directly
// on a QualType object.
bool hasFastQualifiers() const { return getFastQualifiers(); }
unsigned getFastQualifiers() const { return Mask & FastMask; }
void setFastQualifiers(unsigned mask) {
  assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")((!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"
) ? static_cast<void> (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 394, __PRETTY_FUNCTION__));
  Mask = (Mask & ~FastMask) | mask;
}
void removeFastQualifiers(unsigned mask) {
  assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")((!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"
) ? static_cast<void> (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 398, __PRETTY_FUNCTION__));
  Mask &= ~mask;
}
void removeFastQualifiers() {
  removeFastQualifiers(FastMask);
}
void addFastQualifiers(unsigned mask) {
  assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")((!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"
) ? static_cast<void> (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 405, __PRETTY_FUNCTION__));
  Mask |= mask;
}

/// Return true if the set contains any qualifiers which require an ExtQuals
/// node to be allocated.
bool hasNonFastQualifiers() const { return Mask & ~FastMask; }
Qualifiers getNonFastQualifiers() const {
  Qualifiers Quals = *this;
  Quals.setFastQualifiers(0);
  return Quals;
}

/// Return true if the set contains any qualifiers.
bool hasQualifiers() const { return Mask; }
bool empty() const { return !Mask; }

/// Add the qualifiers from the given set to this set.
void addQualifiers(Qualifiers Q) {
  // If the other set doesn't have any non-boolean qualifiers, just
  // bit-or it in.
  if (!(Q.Mask & ~CVRMask))
    Mask |= Q.Mask;
  else {
    Mask |= (Q.Mask & CVRMask);
    if (Q.hasAddressSpace())
      addAddressSpace(Q.getAddressSpace());
    if (Q.hasObjCGCAttr())
      addObjCGCAttr(Q.getObjCGCAttr());
    if (Q.hasObjCLifetime())
      addObjCLifetime(Q.getObjCLifetime());
  }
}

/// Remove the qualifiers from the given set from this set.
void removeQualifiers(Qualifiers Q) {
  // If the other set doesn't have any non-boolean qualifiers, just
  // bit-and the inverse in.
  if (!(Q.Mask & ~CVRMask))
    Mask &= ~Q.Mask;
  else {
    Mask &= ~(Q.Mask & CVRMask);
    if (getObjCGCAttr() == Q.getObjCGCAttr())
      removeObjCGCAttr();
    if (getObjCLifetime() == Q.getObjCLifetime())
      removeObjCLifetime();
    if (getAddressSpace() == Q.getAddressSpace())
      removeAddressSpace();
  }
}

/// Add the qualifiers from the given set to this set, given that
/// they don't conflict.
void addConsistentQualifiers(Qualifiers qs) {
  assert(getAddressSpace() == qs.getAddressSpace() ||((getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace
() || !qs.hasAddressSpace()) ? static_cast<void> (0) : __assert_fail
 ("getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace() || !qs.hasAddressSpace()"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 460, __PRETTY_FUNCTION__))
         !hasAddressSpace() || !qs.hasAddressSpace())((getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace
() || !qs.hasAddressSpace()) ? static_cast<void> (0) : __assert_fail
 ("getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace() || !qs.hasAddressSpace()"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 460, __PRETTY_FUNCTION__));
  assert(getObjCGCAttr() == qs.getObjCGCAttr() ||((getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() ||
 !qs.hasObjCGCAttr()) ? static_cast<void> (0) : __assert_fail
 ("getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 462, __PRETTY_FUNCTION__))
         !hasObjCGCAttr() || !qs.hasObjCGCAttr())((getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() ||
 !qs.hasObjCGCAttr()) ? static_cast<void> (0) : __assert_fail
 ("getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 462, __PRETTY_FUNCTION__));
  assert(getObjCLifetime() == qs.getObjCLifetime() ||((getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime
() || !qs.hasObjCLifetime()) ? static_cast<void> (0) : __assert_fail
 ("getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime() || !qs.hasObjCLifetime()"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 464, __PRETTY_FUNCTION__))
         !hasObjCLifetime() || !qs.hasObjCLifetime())((getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime
() || !qs.hasObjCLifetime()) ? static_cast<void> (0) : __assert_fail
 ("getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime() || !qs.hasObjCLifetime()"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 464, __PRETTY_FUNCTION__));
  Mask |= qs.Mask;
}

/// Returns true if address space A is equal to or a superset of B.
/// OpenCL v2.0 defines conversion rules (OpenCLC v2.0 s6.5.5) and notion of
/// overlapping address spaces.
/// CL1.1 or CL1.2:
///   every address space is a superset of itself.
/// CL2.0 adds:
///   __generic is a superset of any address space except for __constant.
static bool isAddressSpaceSupersetOf(LangAS A, LangAS B) {
  // Address spaces must match exactly.
  return A == B ||
         // Otherwise in OpenCLC v2.0 s6.5.5: every address space except
         // for __constant can be used as __generic.
         (A == LangAS::opencl_generic && B != LangAS::opencl_constant) ||
         // Consider pointer size address spaces to be equivalent to default.
         ((isPtrSizeAddressSpace(A) || A == LangAS::Default) &&
          (isPtrSizeAddressSpace(B) || B == LangAS::Default));
}

/// Returns true if the address space in these qualifiers is equal to or
/// a superset of the address space in the argument qualifiers.
bool isAddressSpaceSupersetOf(Qualifiers other) const {
  return isAddressSpaceSupersetOf(getAddressSpace(), other.getAddressSpace());
}

/// Determines if these qualifiers compatibly include another set.
/// Generally this answers the question of whether an object with the other
/// qualifiers can be safely used as an object with these qualifiers.
bool compatiblyIncludes(Qualifiers other) const {
  return isAddressSpaceSupersetOf(other) &&
         // ObjC GC qualifiers can match, be added, or be removed, but can't
         // be changed.
         (getObjCGCAttr() == other.getObjCGCAttr() || !hasObjCGCAttr() ||
          !other.hasObjCGCAttr()) &&
         // ObjC lifetime qualifiers must match exactly.
         getObjCLifetime() == other.getObjCLifetime() &&
         // CVR qualifiers may subset.
         (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)) &&
         // U qualifier may superset.
         (!other.hasUnaligned() || hasUnaligned());
}

/// Determines if these qualifiers compatibly include another set of
/// qualifiers from the narrow perspective of Objective-C ARC lifetime.
///
/// One set of Objective-C lifetime qualifiers compatibly includes the other
/// if the lifetime qualifiers match, or if both are non-__weak and the
/// including set also contains the 'const' qualifier, or both are non-__weak
/// and one is None (which can only happen in non-ARC modes).
bool compatiblyIncludesObjCLifetime(Qualifiers other) const {
  if (getObjCLifetime() == other.getObjCLifetime())
    return true;

  if (getObjCLifetime() == OCL_Weak || other.getObjCLifetime() == OCL_Weak)
    return false;

  if (getObjCLifetime() == OCL_None || other.getObjCLifetime() == OCL_None)
    return true;

  return hasConst();
}

/// Determine whether this set of qualifiers is a strict superset of
/// another set of qualifiers, not considering qualifier compatibility.
bool isStrictSupersetOf(Qualifiers Other) const;

bool operator==(Qualifiers Other) const { return Mask == Other.Mask; }
bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; }

explicit operator bool() const { return hasQualifiers(); }

Qualifiers &operator+=(Qualifiers R) {
  addQualifiers(R);
  return *this;
}

// Union two qualifier sets.  If an enumerated qualifier appears
// in both sets, use the one from the right.
friend Qualifiers operator+(Qualifiers L, Qualifiers R) {
  L += R;
  return L;
}

Qualifiers &operator-=(Qualifiers R) {
  removeQualifiers(R);
  return *this;
}

/// Compute the difference between two qualifier sets.
friend Qualifiers operator-(Qualifiers L, Qualifiers R) {
  L -= R;
  return L;
}

std::string getAsString() const;
std::string getAsString(const PrintingPolicy &Policy) const;

static std::string getAddrSpaceAsString(LangAS AS);

bool isEmptyWhenPrinted(const PrintingPolicy &Policy) const;
void print(raw_ostream &OS, const PrintingPolicy &Policy,
           bool appendSpaceIfNonEmpty = false) const;

void Profile(llvm::FoldingSetNodeID &ID) const {
  ID.AddInteger(Mask);
}

574private:
// bits:     |0 1 2|3|4 .. 5|6  ..  8|9   ...   31|
//           |C R V|U|GCAttr|Lifetime|AddressSpace|
uint32_t Mask = 0;

static const uint32_t UMask = 0x8;
static const uint32_t UShift = 3;
static const uint32_t GCAttrMask = 0x30;
static const uint32_t GCAttrShift = 4;
static const uint32_t LifetimeMask = 0x1C0;
static const uint32_t LifetimeShift = 6;
static const uint32_t AddressSpaceMask =
    ~(CVRMask | UMask | GCAttrMask | LifetimeMask);
static const uint32_t AddressSpaceShift = 9;
588};

590/// A std::pair-like structure for storing a qualified type split
591/// into its local qualifiers and its locally-unqualified type.
592struct SplitQualType {
/// The locally-unqualified type.
const Type *Ty = nullptr;

/// The local qualifiers.
Qualifiers Quals;

SplitQualType() = default;
SplitQualType(const Type *ty, Qualifiers qs) : Ty(ty), Quals(qs) {}

SplitQualType getSingleStepDesugaredType() const; // end of this file

// Make std::tie work.
std::pair<const Type *,Qualifiers> asPair() const {
  return std::pair<const Type *, Qualifiers>(Ty, Quals);
}

friend bool operator==(SplitQualType a, SplitQualType b) {
  return a.Ty == b.Ty && a.Quals == b.Quals;
}
friend bool operator!=(SplitQualType a, SplitQualType b) {
  return a.Ty != b.Ty || a.Quals != b.Quals;
}
615};

617/// The kind of type we are substituting Objective-C type arguments into.
618///
619/// The kind of substitution affects the replacement of type parameters when
620/// no concrete type information is provided, e.g., when dealing with an
621/// unspecialized type.
622enum class ObjCSubstitutionContext {
/// An ordinary type.
Ordinary,

/// The result type of a method or function.
Result,

/// The parameter type of a method or function.
Parameter,

/// The type of a property.
Property,

/// The superclass of a type.
Superclass,
637};

639/// A (possibly-)qualified type.
640///
641/// For efficiency, we don't store CV-qualified types as nodes on their
642/// own: instead each reference to a type stores the qualifiers.  This
643/// greatly reduces the number of nodes we need to allocate for types (for
644/// example we only need one for 'int', 'const int', 'volatile int',
645/// 'const volatile int', etc).
646///
647/// As an added efficiency bonus, instead of making this a pair, we
648/// just store the two bits we care about in the low bits of the
649/// pointer.  To handle the packing/unpacking, we make QualType be a
650/// simple wrapper class that acts like a smart pointer.  A third bit
651/// indicates whether there are extended qualifiers present, in which
652/// case the pointer points to a special structure.
653class QualType {
friend class QualifierCollector;

// Thankfully, these are efficiently composable.
llvm::PointerIntPair<llvm::PointerUnion<const Type *, const ExtQuals *>,
                     Qualifiers::FastWidth> Value;

const ExtQuals *getExtQualsUnsafe() const {
  return Value.getPointer().get<const ExtQuals*>();
}

const Type *getTypePtrUnsafe() const {
  return Value.getPointer().get<const Type*>();
}

const ExtQualsTypeCommonBase *getCommonPtr() const {
  assert(!isNull() && "Cannot retrieve a NULL type pointer")((!isNull() && "Cannot retrieve a NULL type pointer")
 ? static_cast<void> (0) : __assert_fail ("!isNull() && \"Cannot retrieve a NULL type pointer\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 669, __PRETTY_FUNCTION__));
  auto CommonPtrVal = reinterpret_cast<uintptr_t>(Value.getOpaqueValue());
  CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1);
  return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal);
}

675public:
QualType() = default;
QualType(const Type *Ptr, unsigned Quals) : Value(Ptr, Quals) {}
QualType(const ExtQuals *Ptr, unsigned Quals) : Value(Ptr, Quals) {}

unsigned getLocalFastQualifiers() const { return Value.getInt(); }
void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); }

/// Retrieves a pointer to the underlying (unqualified) type.
///
/// This function requires that the type not be NULL. If the type might be
/// NULL, use the (slightly less efficient) \c getTypePtrOrNull().
const Type *getTypePtr() const;

const Type *getTypePtrOrNull() const;

/// Retrieves a pointer to the name of the base type.
const IdentifierInfo *getBaseTypeIdentifier() const;

/// Divides a QualType into its unqualified type and a set of local
/// qualifiers.
SplitQualType split() const;

void *getAsOpaquePtr() const { return Value.getOpaqueValue(); }

static QualType getFromOpaquePtr(const void *Ptr) {
  QualType T;
  T.Value.setFromOpaqueValue(const_cast<void*>(Ptr));
  return T;
}

const Type &operator*() const {
  return *getTypePtr();
}

const Type *operator->() const {
  return getTypePtr();
}

bool isCanonical() const;
bool isCanonicalAsParam() const;

/// Return true if this QualType doesn't point to a type yet.
bool isNull() const {
  return Value.getPointer().isNull();
}

/// Determine whether this particular QualType instance has the
/// "const" qualifier set, without looking through typedefs that may have
/// added "const" at a different level.
bool isLocalConstQualified() const {
  return (getLocalFastQualifiers() & Qualifiers::Const);
}

/// Determine whether this type is const-qualified.
bool isConstQualified() const;

/// Determine whether this particular QualType instance has the
/// "restrict" qualifier set, without looking through typedefs that may have
/// added "restrict" at a different level.
bool isLocalRestrictQualified() const {
  return (getLocalFastQualifiers() & Qualifiers::Restrict);
}

/// Determine whether this type is restrict-qualified.
bool isRestrictQualified() const;

/// Determine whether this particular QualType instance has the
/// "volatile" qualifier set, without looking through typedefs that may have
/// added "volatile" at a different level.
bool isLocalVolatileQualified() const {
  return (getLocalFastQualifiers() & Qualifiers::Volatile);
}

/// Determine whether this type is volatile-qualified.
bool isVolatileQualified() const;

/// Determine whether this particular QualType instance has any
/// qualifiers, without looking through any typedefs that might add
/// qualifiers at a different level.
bool hasLocalQualifiers() const {
  return getLocalFastQualifiers() || hasLocalNonFastQualifiers();
}

/// Determine whether this type has any qualifiers.
bool hasQualifiers() const;

/// Determine whether this particular QualType instance has any
/// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType
/// instance.
bool hasLocalNonFastQualifiers() const {
  return Value.getPointer().is<const ExtQuals*>();
}

/// Retrieve the set of qualifiers local to this particular QualType
/// instance, not including any qualifiers acquired through typedefs or
/// other sugar.
Qualifiers getLocalQualifiers() const;

/// Retrieve the set of qualifiers applied to this type.
Qualifiers getQualifiers() const;

/// Retrieve the set of CVR (const-volatile-restrict) qualifiers
/// local to this particular QualType instance, not including any qualifiers
/// acquired through typedefs or other sugar.
unsigned getLocalCVRQualifiers() const {
  return getLocalFastQualifiers();
}

/// Retrieve the set of CVR (const-volatile-restrict) qualifiers
/// applied to this type.
unsigned getCVRQualifiers() const;

bool isConstant(const ASTContext& Ctx) const {
  return QualType::isConstant(*this, Ctx);
}

/// Determine whether this is a Plain Old Data (POD) type (C++ 3.9p10).
bool isPODType(const ASTContext &Context) const;

/// Return true if this is a POD type according to the rules of the C++98
/// standard, regardless of the current compilation's language.
bool isCXX98PODType(const ASTContext &Context) const;

/// Return true if this is a POD type according to the more relaxed rules
/// of the C++11 standard, regardless of the current compilation's language.
/// (C++0x [basic.types]p9). Note that, unlike
/// CXXRecordDecl::isCXX11StandardLayout, this takes DRs into account.
bool isCXX11PODType(const ASTContext &Context) const;

/// Return true if this is a trivial type per (C++0x [basic.types]p9)
bool isTrivialType(const ASTContext &Context) const;

/// Return true if this is a trivially copyable type (C++0x [basic.types]p9)
bool isTriviallyCopyableType(const ASTContext &Context) const;


/// Returns true if it is a class and it might be dynamic.
bool mayBeDynamicClass() const;

/// Returns true if it is not a class or if the class might not be dynamic.
bool mayBeNotDynamicClass() const;

// Don't promise in the API that anything besides 'const' can be
// easily added.

/// Add the `const` type qualifier to this QualType.
void addConst() {
  addFastQualifiers(Qualifiers::Const);
}
QualType withConst() const {
  return withFastQualifiers(Qualifiers::Const);
}

/// Add the `volatile` type qualifier to this QualType.
void addVolatile() {
  addFastQualifiers(Qualifiers::Volatile);
}
QualType withVolatile() const {
  return withFastQualifiers(Qualifiers::Volatile);
}

/// Add the `restrict` qualifier to this QualType.
void addRestrict() {
  addFastQualifiers(Qualifiers::Restrict);
}
QualType withRestrict() const {
  return withFastQualifiers(Qualifiers::Restrict);
}

QualType withCVRQualifiers(unsigned CVR) const {
  return withFastQualifiers(CVR);
}

void addFastQualifiers(unsigned TQs) {
  assert(!(TQs & ~Qualifiers::FastMask)((!(TQs & ~Qualifiers::FastMask) && "non-fast qualifier bits set in mask!"
) ? static_cast<void> (0) : __assert_fail ("!(TQs & ~Qualifiers::FastMask) && \"non-fast qualifier bits set in mask!\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 851, __PRETTY_FUNCTION__))
         && "non-fast qualifier bits set in mask!")((!(TQs & ~Qualifiers::FastMask) && "non-fast qualifier bits set in mask!"
) ? static_cast<void> (0) : __assert_fail ("!(TQs & ~Qualifiers::FastMask) && \"non-fast qualifier bits set in mask!\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 851, __PRETTY_FUNCTION__));
  Value.setInt(Value.getInt() | TQs);
}

void removeLocalConst();
void removeLocalVolatile();
void removeLocalRestrict();
void removeLocalCVRQualifiers(unsigned Mask);

void removeLocalFastQualifiers() { Value.setInt(0); }
void removeLocalFastQualifiers(unsigned Mask) {
  assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers")((!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"
) ? static_cast<void> (0) : __assert_fail ("!(Mask & ~Qualifiers::FastMask) && \"mask has non-fast qualifiers\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 862, __PRETTY_FUNCTION__));
  Value.setInt(Value.getInt() & ~Mask);
}

// Creates a type with the given qualifiers in addition to any
// qualifiers already on this type.
QualType withFastQualifiers(unsigned TQs) const {
  QualType T = *this;
  T.addFastQualifiers(TQs);
  return T;
}

// Creates a type with exactly the given fast qualifiers, removing
// any existing fast qualifiers.
QualType withExactLocalFastQualifiers(unsigned TQs) const {
  return withoutLocalFastQualifiers().withFastQualifiers(TQs);
}

// Removes fast qualifiers, but leaves any extended qualifiers in place.
QualType withoutLocalFastQualifiers() const {
  QualType T = *this;
  T.removeLocalFastQualifiers();
  return T;
}

QualType getCanonicalType() const;

/// Return this type with all of the instance-specific qualifiers
/// removed, but without removing any qualifiers that may have been applied
/// through typedefs.
QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); }

/// Retrieve the unqualified variant of the given type,
/// removing as little sugar as possible.
///
/// This routine looks through various kinds of sugar to find the
/// least-desugared type that is unqualified. For example, given:
///
/// \code
/// typedef int Integer;
/// typedef const Integer CInteger;
/// typedef CInteger DifferenceType;
/// \endcode
///
/// Executing \c getUnqualifiedType() on the type \c DifferenceType will
/// desugar until we hit the type \c Integer, which has no qualifiers on it.
///
/// The resulting type might still be qualified if it's sugar for an array
/// type.  To strip qualifiers even from within a sugared array type, use
/// ASTContext::getUnqualifiedArrayType.
inline QualType getUnqualifiedType() const;

/// Retrieve the unqualified variant of the given type, removing as little
/// sugar as possible.
///
/// Like getUnqualifiedType(), but also returns the set of
/// qualifiers that were built up.
///
/// The resulting type might still be qualified if it's sugar for an array
/// type.  To strip qualifiers even from within a sugared array type, use
/// ASTContext::getUnqualifiedArrayType.
inline SplitQualType getSplitUnqualifiedType() const;

/// Determine whether this type is more qualified than the other
/// given type, requiring exact equality for non-CVR qualifiers.
bool isMoreQualifiedThan(QualType Other) const;

/// Determine whether this type is at least as qualified as the other
/// given type, requiring exact equality for non-CVR qualifiers.
bool isAtLeastAsQualifiedAs(QualType Other) const;

QualType getNonReferenceType() const;

/// Determine the type of a (typically non-lvalue) expression with the
/// specified result type.
///
/// This routine should be used for expressions for which the return type is
/// explicitly specified (e.g., in a cast or call) and isn't necessarily
/// an lvalue. It removes a top-level reference (since there are no
/// expressions of reference type) and deletes top-level cvr-qualifiers
/// from non-class types (in C++) or all types (in C).
QualType getNonLValueExprType(const ASTContext &Context) const;

/// Return the specified type with any "sugar" removed from
/// the type.  This takes off typedefs, typeof's etc.  If the outer level of
/// the type is already concrete, it returns it unmodified.  This is similar
/// to getting the canonical type, but it doesn't remove *all* typedefs.  For
/// example, it returns "T*" as "T*", (not as "int*"), because the pointer is
/// concrete.
///
/// Qualifiers are left in place.
QualType getDesugaredType(const ASTContext &Context) const {
  return getDesugaredType(*this, Context);
}

SplitQualType getSplitDesugaredType() const {
  return getSplitDesugaredType(*this);
}

/// Return the specified type with one level of "sugar" removed from
/// the type.
///
/// This routine takes off the first typedef, typeof, etc. If the outer level
/// of the type is already concrete, it returns it unmodified.
QualType getSingleStepDesugaredType(const ASTContext &Context) const {
  return getSingleStepDesugaredTypeImpl(*this, Context);
}

/// Returns the specified type after dropping any
/// outer-level parentheses.
QualType IgnoreParens() const {
  if (isa<ParenType>(*this))
    return QualType::IgnoreParens(*this);
  return *this;
}

/// Indicate whether the specified types and qualifiers are identical.
friend bool operator==(const QualType &LHS, const QualType &RHS) {
  return LHS.Value == RHS.Value;
}
friend bool operator!=(const QualType &LHS, const QualType &RHS) {
  return LHS.Value != RHS.Value;
}
friend bool operator<(const QualType &LHS, const QualType &RHS) {
  return LHS.Value < RHS.Value;
}

static std::string getAsString(SplitQualType split,
                               const PrintingPolicy &Policy) {
  return getAsString(split.Ty, split.Quals, Policy);
}
static std::string getAsString(const Type *ty, Qualifiers qs,
                               const PrintingPolicy &Policy);

std::string getAsString() const;
std::string getAsString(const PrintingPolicy &Policy) const;

void print(raw_ostream &OS, const PrintingPolicy &Policy,
           const Twine &PlaceHolder = Twine(),
           unsigned Indentation = 0) const;

static void print(SplitQualType split, raw_ostream &OS,
                  const PrintingPolicy &policy, const Twine &PlaceHolder,
                  unsigned Indentation = 0) {
  return print(split.Ty, split.Quals, OS, policy, PlaceHolder, Indentation);
}

static void print(const Type *ty, Qualifiers qs,
                  raw_ostream &OS, const PrintingPolicy &policy,
                  const Twine &PlaceHolder,
                  unsigned Indentation = 0);

void getAsStringInternal(std::string &Str,
                         const PrintingPolicy &Policy) const;

static void getAsStringInternal(SplitQualType split, std::string &out,
                                const PrintingPolicy &policy) {
  return getAsStringInternal(split.Ty, split.Quals, out, policy);
}

static void getAsStringInternal(const Type *ty, Qualifiers qs,
                                std::string &out,
                                const PrintingPolicy &policy);

class StreamedQualTypeHelper {
  const QualType &T;
  const PrintingPolicy &Policy;
  const Twine &PlaceHolder;
  unsigned Indentation;

public:
  StreamedQualTypeHelper(const QualType &T, const PrintingPolicy &Policy,
                         const Twine &PlaceHolder, unsigned Indentation)
      : T(T), Policy(Policy), PlaceHolder(PlaceHolder),
        Indentation(Indentation) {}

  friend raw_ostream &operator<<(raw_ostream &OS,
                                 const StreamedQualTypeHelper &SQT) {
    SQT.T.print(OS, SQT.Policy, SQT.PlaceHolder, SQT.Indentation);
    return OS;
  }
};

StreamedQualTypeHelper stream(const PrintingPolicy &Policy,
                              const Twine &PlaceHolder = Twine(),
                              unsigned Indentation = 0) const {
  return StreamedQualTypeHelper(*this, Policy, PlaceHolder, Indentation);
}

void dump(const char *s) const;
void dump() const;
void dump(llvm::raw_ostream &OS) const;

void Profile(llvm::FoldingSetNodeID &ID) const {
  ID.AddPointer(getAsOpaquePtr());
}

/// Check if this type has any address space qualifier.
inline bool hasAddressSpace() const;

/// Return the address space of this type.
inline LangAS getAddressSpace() const;

/// Returns gc attribute of this type.
inline Qualifiers::GC getObjCGCAttr() const;

/// true when Type is objc's weak.
bool isObjCGCWeak() const {
  return getObjCGCAttr() == Qualifiers::Weak;
}

/// true when Type is objc's strong.
bool isObjCGCStrong() const {
  return getObjCGCAttr() == Qualifiers::Strong;
}

/// Returns lifetime attribute of this type.
Qualifiers::ObjCLifetime getObjCLifetime() const {
  return getQualifiers().getObjCLifetime();
}

bool hasNonTrivialObjCLifetime() const {
  return getQualifiers().hasNonTrivialObjCLifetime();
}

bool hasStrongOrWeakObjCLifetime() const {
  return getQualifiers().hasStrongOrWeakObjCLifetime();
2
←
Calling 'Qualifiers::hasStrongOrWeakObjCLifetime'→
5
←
Returning from 'Qualifiers::hasStrongOrWeakObjCLifetime'→
6
←
Returning the value 1, which participates in a condition later→
}

// true when Type is objc's weak and weak is enabled but ARC isn't.
bool isNonWeakInMRRWithObjCWeak(const ASTContext &Context) const;

enum PrimitiveDefaultInitializeKind {
  /// The type does not fall into any of the following categories. Note that
  /// this case is zero-valued so that values of this enum can be used as a
  /// boolean condition for non-triviality.
  PDIK_Trivial,

  /// The type is an Objective-C retainable pointer type that is qualified
  /// with the ARC __strong qualifier.
  PDIK_ARCStrong,

  /// The type is an Objective-C retainable pointer type that is qualified
  /// with the ARC __weak qualifier.
  PDIK_ARCWeak,

  /// The type is a struct containing a field whose type is not PCK_Trivial.
  PDIK_Struct
};

/// Functions to query basic properties of non-trivial C struct types.

/// Check if this is a non-trivial type that would cause a C struct
/// transitively containing this type to be non-trivial to default initialize
/// and return the kind.
PrimitiveDefaultInitializeKind
isNonTrivialToPrimitiveDefaultInitialize() const;

enum PrimitiveCopyKind {
  /// The type does not fall into any of the following categories. Note that
  /// this case is zero-valued so that values of this enum can be used as a
  /// boolean condition for non-triviality.
  PCK_Trivial,

  /// The type would be trivial except that it is volatile-qualified. Types
  /// that fall into one of the other non-trivial cases may additionally be
  /// volatile-qualified.
  PCK_VolatileTrivial,

  /// The type is an Objective-C retainable pointer type that is qualified
  /// with the ARC __strong qualifier.
  PCK_ARCStrong,

  /// The type is an Objective-C retainable pointer type that is qualified
  /// with the ARC __weak qualifier.
  PCK_ARCWeak,

  /// The type is a struct containing a field whose type is neither
  /// PCK_Trivial nor PCK_VolatileTrivial.
  /// Note that a C++ struct type does not necessarily match this; C++ copying
  /// semantics are too complex to express here, in part because they depend
  /// on the exact constructor or assignment operator that is chosen by
  /// overload resolution to do the copy.
  PCK_Struct
};

/// Check if this is a non-trivial type that would cause a C struct
/// transitively containing this type to be non-trivial to copy and return the
/// kind.
PrimitiveCopyKind isNonTrivialToPrimitiveCopy() const;

/// Check if this is a non-trivial type that would cause a C struct
/// transitively containing this type to be non-trivial to destructively
/// move and return the kind. Destructive move in this context is a C++-style
/// move in which the source object is placed in a valid but unspecified state
/// after it is moved, as opposed to a truly destructive move in which the
/// source object is placed in an uninitialized state.
PrimitiveCopyKind isNonTrivialToPrimitiveDestructiveMove() const;

enum DestructionKind {
  DK_none,
  DK_cxx_destructor,
  DK_objc_strong_lifetime,
  DK_objc_weak_lifetime,
  DK_nontrivial_c_struct
};

/// Returns a nonzero value if objects of this type require
/// non-trivial work to clean up after.  Non-zero because it's
/// conceivable that qualifiers (objc_gc(weak)?) could make
/// something require destruction.
DestructionKind isDestructedType() const {
  return isDestructedTypeImpl(*this);
}

/// Check if this is or contains a C union that is non-trivial to
/// default-initialize, which is a union that has a member that is non-trivial
/// to default-initialize. If this returns true,
/// isNonTrivialToPrimitiveDefaultInitialize returns PDIK_Struct.
bool hasNonTrivialToPrimitiveDefaultInitializeCUnion() const;

/// Check if this is or contains a C union that is non-trivial to destruct,
/// which is a union that has a member that is non-trivial to destruct. If
/// this returns true, isDestructedType returns DK_nontrivial_c_struct.
bool hasNonTrivialToPrimitiveDestructCUnion() const;

/// Check if this is or contains a C union that is non-trivial to copy, which
/// is a union that has a member that is non-trivial to copy. If this returns
/// true, isNonTrivialToPrimitiveCopy returns PCK_Struct.
bool hasNonTrivialToPrimitiveCopyCUnion() const;

/// Determine whether expressions of the given type are forbidden
/// from being lvalues in C.
///
/// The expression types that are forbidden to be lvalues are:
///   - 'void', but not qualified void
///   - function types
///
/// The exact rule here is C99 6.3.2.1:
///   An lvalue is an expression with an object type or an incomplete
///   type other than void.
bool isCForbiddenLValueType() const;

/// Substitute type arguments for the Objective-C type parameters used in the
/// subject type.
///
/// \param ctx ASTContext in which the type exists.
///
/// \param typeArgs The type arguments that will be substituted for the
/// Objective-C type parameters in the subject type, which are generally
/// computed via \c Type::getObjCSubstitutions. If empty, the type
/// parameters will be replaced with their bounds or id/Class, as appropriate
/// for the context.
///
/// \param context The context in which the subject type was written.
///
/// \returns the resulting type.
QualType substObjCTypeArgs(ASTContext &ctx,
                           ArrayRef<QualType> typeArgs,
                           ObjCSubstitutionContext context) const;

/// Substitute type arguments from an object type for the Objective-C type
/// parameters used in the subject type.
///
/// This operation combines the computation of type arguments for
/// substitution (\c Type::getObjCSubstitutions) with the actual process of
/// substitution (\c QualType::substObjCTypeArgs) for the convenience of
/// callers that need to perform a single substitution in isolation.
///
/// \param objectType The type of the object whose member type we're
/// substituting into. For example, this might be the receiver of a message
/// or the base of a property access.
///
/// \param dc The declaration context from which the subject type was
/// retrieved, which indicates (for example) which type parameters should
/// be substituted.
///
/// \param context The context in which the subject type was written.
///
/// \returns the subject type after replacing all of the Objective-C type
/// parameters with their corresponding arguments.
QualType substObjCMemberType(QualType objectType,
                             const DeclContext *dc,
                             ObjCSubstitutionContext context) const;

/// Strip Objective-C "__kindof" types from the given type.
QualType stripObjCKindOfType(const ASTContext &ctx) const;

/// Remove all qualifiers including _Atomic.
QualType getAtomicUnqualifiedType() const;

1253private:
// These methods are implemented in a separate translation unit;
// "static"-ize them to avoid creating temporary QualTypes in the
// caller.
static bool isConstant(QualType T, const ASTContext& Ctx);
static QualType getDesugaredType(QualType T, const ASTContext &Context);
static SplitQualType getSplitDesugaredType(QualType T);
static SplitQualType getSplitUnqualifiedTypeImpl(QualType type);
static QualType getSingleStepDesugaredTypeImpl(QualType type,
                                               const ASTContext &C);
static QualType IgnoreParens(QualType T);
static DestructionKind isDestructedTypeImpl(QualType type);

/// Check if \param RD is or contains a non-trivial C union.
static bool hasNonTrivialToPrimitiveDefaultInitializeCUnion(const RecordDecl *RD);
static bool hasNonTrivialToPrimitiveDestructCUnion(const RecordDecl *RD);
static bool hasNonTrivialToPrimitiveCopyCUnion(const RecordDecl *RD);
1270};

1272} // namespace clang

1274namespace llvm {

1276/// Implement simplify_type for QualType, so that we can dyn_cast from QualType
1277/// to a specific Type class.
1278template<> struct simplify_type< ::clang::QualType> {
using SimpleType = const ::clang::Type *;

static SimpleType getSimplifiedValue(::clang::QualType Val) {
  return Val.getTypePtr();
}
1284};

1286// Teach SmallPtrSet that QualType is "basically a pointer".
1287template<>
1288struct PointerLikeTypeTraits<clang::QualType> {
static inline void *getAsVoidPointer(clang::QualType P) {
  return P.getAsOpaquePtr();
}

static inline clang::QualType getFromVoidPointer(void *P) {
  return clang::QualType::getFromOpaquePtr(P);
}

// Various qualifiers go in low bits.
enum { NumLowBitsAvailable = 0 };
1299};

1301} // namespace llvm

1303namespace clang {

1305/// Base class that is common to both the \c ExtQuals and \c Type
1306/// classes, which allows \c QualType to access the common fields between the
1307/// two.
1308class ExtQualsTypeCommonBase {
friend class ExtQuals;
friend class QualType;
friend class Type;

/// The "base" type of an extended qualifiers type (\c ExtQuals) or
/// a self-referential pointer (for \c Type).
///
/// This pointer allows an efficient mapping from a QualType to its
/// underlying type pointer.
const Type *const BaseType;

/// The canonical type of this type.  A QualType.
QualType CanonicalType;

ExtQualsTypeCommonBase(const Type *baseType, QualType canon)
    : BaseType(baseType), CanonicalType(canon) {}
1325};

1327/// We can encode up to four bits in the low bits of a
1328/// type pointer, but there are many more type qualifiers that we want
1329/// to be able to apply to an arbitrary type.  Therefore we have this
1330/// struct, intended to be heap-allocated and used by QualType to
1331/// store qualifiers.
1332///
1333/// The current design tags the 'const', 'restrict', and 'volatile' qualifiers
1334/// in three low bits on the QualType pointer; a fourth bit records whether
1335/// the pointer is an ExtQuals node. The extended qualifiers (address spaces,
1336/// Objective-C GC attributes) are much more rare.
1337class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode {
// NOTE: changing the fast qualifiers should be straightforward as
// long as you don't make 'const' non-fast.
// 1. Qualifiers:
//    a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ).
//       Fast qualifiers must occupy the low-order bits.
//    b) Update Qualifiers::FastWidth and FastMask.
// 2. QualType:
//    a) Update is{Volatile,Restrict}Qualified(), defined inline.
//    b) Update remove{Volatile,Restrict}, defined near the end of
//       this header.
// 3. ASTContext:
//    a) Update get{Volatile,Restrict}Type.

/// The immutable set of qualifiers applied by this node. Always contains
/// extended qualifiers.
Qualifiers Quals;

ExtQuals *this_() { return this; }

1357public:
ExtQuals(const Type *baseType, QualType canon, Qualifiers quals)
    : ExtQualsTypeCommonBase(baseType,
                             canon.isNull() ? QualType(this_(), 0) : canon),
      Quals(quals) {
  assert(Quals.hasNonFastQualifiers()((Quals.hasNonFastQualifiers() && "ExtQuals created with no fast qualifiers"
) ? static_cast<void> (0) : __assert_fail ("Quals.hasNonFastQualifiers() && \"ExtQuals created with no fast qualifiers\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 1363, __PRETTY_FUNCTION__))
         && "ExtQuals created with no fast qualifiers")((Quals.hasNonFastQualifiers() && "ExtQuals created with no fast qualifiers"
) ? static_cast<void> (0) : __assert_fail ("Quals.hasNonFastQualifiers() && \"ExtQuals created with no fast qualifiers\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 1363, __PRETTY_FUNCTION__));
  assert(!Quals.hasFastQualifiers()((!Quals.hasFastQualifiers() && "ExtQuals created with fast qualifiers"
) ? static_cast<void> (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"ExtQuals created with fast qualifiers\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 1365, __PRETTY_FUNCTION__))
         && "ExtQuals created with fast qualifiers")((!Quals.hasFastQualifiers() && "ExtQuals created with fast qualifiers"
) ? static_cast<void> (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"ExtQuals created with fast qualifiers\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 1365, __PRETTY_FUNCTION__));
}

Qualifiers getQualifiers() const { return Quals; }

bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); }
Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); }

bool hasObjCLifetime() const { return Quals.hasObjCLifetime(); }
Qualifiers::ObjCLifetime getObjCLifetime() const {
  return Quals.getObjCLifetime();
}

bool hasAddressSpace() const { return Quals.hasAddressSpace(); }
LangAS getAddressSpace() const { return Quals.getAddressSpace(); }

const Type *getBaseType() const { return BaseType; }

1383public:
void Profile(llvm::FoldingSetNodeID &ID) const {
  Profile(ID, getBaseType(), Quals);
}

static void Profile(llvm::FoldingSetNodeID &ID,
                    const Type *BaseType,
                    Qualifiers Quals) {
  assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!")((!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"
) ? static_cast<void> (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"fast qualifiers in ExtQuals hash!\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 1391, __PRETTY_FUNCTION__));
  ID.AddPointer(BaseType);
  Quals.Profile(ID);
}
1395};

1397/// The kind of C++11 ref-qualifier associated with a function type.
1398/// This determines whether a member function's "this" object can be an
1399/// lvalue, rvalue, or neither.
1400enum RefQualifierKind {
/// No ref-qualifier was provided.
RQ_None = 0,

/// An lvalue ref-qualifier was provided (\c &).
RQ_LValue,

/// An rvalue ref-qualifier was provided (\c &&).
RQ_RValue
1409};

1411/// Which keyword(s) were used to create an AutoType.
1412enum class AutoTypeKeyword {
/// auto
Auto,

/// decltype(auto)
DecltypeAuto,

/// __auto_type (GNU extension)
GNUAutoType
1421};

1423/// The base class of the type hierarchy.
1424///
1425/// A central concept with types is that each type always has a canonical
1426/// type.  A canonical type is the type with any typedef names stripped out
1427/// of it or the types it references.  For example, consider:
1428///
1429///  typedef int  foo;
1430///  typedef foo* bar;
1431///    'int *'    'foo *'    'bar'
1432///
1433/// There will be a Type object created for 'int'.  Since int is canonical, its
1434/// CanonicalType pointer points to itself.  There is also a Type for 'foo' (a
1435/// TypedefType).  Its CanonicalType pointer points to the 'int' Type.  Next
1436/// there is a PointerType that represents 'int*', which, like 'int', is
1437/// canonical.  Finally, there is a PointerType type for 'foo*' whose canonical
1438/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type
1439/// is also 'int*'.
1440///
1441/// Non-canonical types are useful for emitting diagnostics, without losing
1442/// information about typedefs being used.  Canonical types are useful for type
1443/// comparisons (they allow by-pointer equality tests) and useful for reasoning
1444/// about whether something has a particular form (e.g. is a function type),
1445/// because they implicitly, recursively, strip all typedefs out of a type.
1446///
1447/// Types, once created, are immutable.
1448///
1449class alignas(8) Type : public ExtQualsTypeCommonBase {
1450public:
enum TypeClass {
1452#define TYPE(Class, Base) Class,
1453#define LAST_TYPE(Class) TypeLast = Class
1454#define ABSTRACT_TYPE(Class, Base)
1455#include "clang/AST/TypeNodes.inc"
};

1458private:
/// Bitfields required by the Type class.
class TypeBitfields {
  friend class Type;
  template <class T> friend class TypePropertyCache;

  /// TypeClass bitfield - Enum that specifies what subclass this belongs to.
  unsigned TC : 8;

  /// Whether this type is a dependent type (C++ [temp.dep.type]).
  unsigned Dependent : 1;

  /// Whether this type somehow involves a template parameter, even
  /// if the resolution of the type does not depend on a template parameter.
  unsigned InstantiationDependent : 1;

  /// Whether this type is a variably-modified type (C99 6.7.5).
  unsigned VariablyModified : 1;

  /// Whether this type contains an unexpanded parameter pack
  /// (for C++11 variadic templates).
  unsigned ContainsUnexpandedParameterPack : 1;

  /// True if the cache (i.e. the bitfields here starting with
  /// 'Cache') is valid.
  mutable unsigned CacheValid : 1;

  /// Linkage of this type.
  mutable unsigned CachedLinkage : 3;

  /// Whether this type involves and local or unnamed types.
  mutable unsigned CachedLocalOrUnnamed : 1;

  /// Whether this type comes from an AST file.
  mutable unsigned FromAST : 1;

  bool isCacheValid() const {
    return CacheValid;
  }

  Linkage getLinkage() const {
    assert(isCacheValid() && "getting linkage from invalid cache")((isCacheValid() && "getting linkage from invalid cache"
) ? static_cast<void> (0) : __assert_fail ("isCacheValid() && \"getting linkage from invalid cache\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 1499, __PRETTY_FUNCTION__));
    return static_cast<Linkage>(CachedLinkage);
  }

  bool hasLocalOrUnnamedType() const {
    assert(isCacheValid() && "getting linkage from invalid cache")((isCacheValid() && "getting linkage from invalid cache"
) ? static_cast<void> (0) : __assert_fail ("isCacheValid() && \"getting linkage from invalid cache\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 1504, __PRETTY_FUNCTION__));
    return CachedLocalOrUnnamed;
  }
};
enum { NumTypeBits = 18 };

1510protected:
// These classes allow subclasses to somewhat cleanly pack bitfields
// into Type.

class ArrayTypeBitfields {
  friend class ArrayType;

  unsigned : NumTypeBits;

  /// CVR qualifiers from declarations like
  /// 'int X[static restrict 4]'. For function parameters only.
  unsigned IndexTypeQuals : 3;

  /// Storage class qualifiers from declarations like
  /// 'int X[static restrict 4]'. For function parameters only.
  /// Actually an ArrayType::ArraySizeModifier.
  unsigned SizeModifier : 3;
};

class ConstantArrayTypeBitfields {
  friend class ConstantArrayType;

  unsigned : NumTypeBits + 3 + 3;

  /// Whether we have a stored size expression.
  unsigned HasStoredSizeExpr : 1;
};

class BuiltinTypeBitfields {
  friend class BuiltinType;

  unsigned : NumTypeBits;

  /// The kind (BuiltinType::Kind) of builtin type this is.
  unsigned Kind : 8;
};

/// FunctionTypeBitfields store various bits belonging to FunctionProtoType.
/// Only common bits are stored here. Additional uncommon bits are stored
/// in a trailing object after FunctionProtoType.
class FunctionTypeBitfields {
  friend class FunctionProtoType;
  friend class FunctionType;

  unsigned : NumTypeBits;

  /// Extra information which affects how the function is called, like
  /// regparm and the calling convention.
  unsigned ExtInfo : 12;

  /// The ref-qualifier associated with a \c FunctionProtoType.
  ///
  /// This is a value of type \c RefQualifierKind.
  unsigned RefQualifier : 2;

  /// Used only by FunctionProtoType, put here to pack with the
  /// other bitfields.
  /// The qualifiers are part of FunctionProtoType because...
  ///
  /// C++ 8.3.5p4: The return type, the parameter type list and the
  /// cv-qualifier-seq, [...], are part of the function type.
  unsigned FastTypeQuals : Qualifiers::FastWidth;
  /// Whether this function has extended Qualifiers.
  unsigned HasExtQuals : 1;

  /// The number of parameters this function has, not counting '...'.
  /// According to [implimits] 8 bits should be enough here but this is
  /// somewhat easy to exceed with metaprogramming and so we would like to
  /// keep NumParams as wide as reasonably possible.
  unsigned NumParams : 16;

  /// The type of exception specification this function has.
  unsigned ExceptionSpecType : 4;

  /// Whether this function has extended parameter information.
  unsigned HasExtParameterInfos : 1;

  /// Whether the function is variadic.
  unsigned Variadic : 1;

  /// Whether this function has a trailing return type.
  unsigned HasTrailingReturn : 1;
};

class ObjCObjectTypeBitfields {
  friend class ObjCObjectType;

  unsigned : NumTypeBits;

  /// The number of type arguments stored directly on this object type.
  unsigned NumTypeArgs : 7;

  /// The number of protocols stored directly on this object type.
  unsigned NumProtocols : 6;

  /// Whether this is a "kindof" type.
  unsigned IsKindOf : 1;
};

class ReferenceTypeBitfields {
  friend class ReferenceType;

  unsigned : NumTypeBits;

  /// True if the type was originally spelled with an lvalue sigil.
  /// This is never true of rvalue references but can also be false
  /// on lvalue references because of C++0x [dcl.typedef]p9,
  /// as follows:
  ///
  ///   typedef int &ref;    // lvalue, spelled lvalue
  ///   typedef int &&rvref; // rvalue
  ///   ref &a;              // lvalue, inner ref, spelled lvalue
  ///   ref &&a;             // lvalue, inner ref
  ///   rvref &a;            // lvalue, inner ref, spelled lvalue
  ///   rvref &&a;           // rvalue, inner ref
  unsigned SpelledAsLValue : 1;

  /// True if the inner type is a reference type.  This only happens
  /// in non-canonical forms.
  unsigned InnerRef : 1;
};

class TypeWithKeywordBitfields {
  friend class TypeWithKeyword;

  unsigned : NumTypeBits;

  /// An ElaboratedTypeKeyword.  8 bits for efficient access.
  unsigned Keyword : 8;
};

enum { NumTypeWithKeywordBits = 8 };

class ElaboratedTypeBitfields {
  friend class ElaboratedType;

  unsigned : NumTypeBits;
  unsigned : NumTypeWithKeywordBits;

  /// Whether the ElaboratedType has a trailing OwnedTagDecl.
  unsigned HasOwnedTagDecl : 1;
};

class VectorTypeBitfields {
  friend class VectorType;
  friend class DependentVectorType;

  unsigned : NumTypeBits;

  /// The kind of vector, either a generic vector type or some
  /// target-specific vector type such as for AltiVec or Neon.
  unsigned VecKind : 3;

  /// The number of elements in the vector.
  unsigned NumElements : 29 - NumTypeBits;

  enum { MaxNumElements = (1 << (29 - NumTypeBits)) - 1 };
};

class AttributedTypeBitfields {
  friend class AttributedType;

  unsigned : NumTypeBits;

  /// An AttributedType::Kind
  unsigned AttrKind : 32 - NumTypeBits;
};

class AutoTypeBitfields {
  friend class AutoType;

  unsigned : NumTypeBits;

  /// Was this placeholder type spelled as 'auto', 'decltype(auto)',
  /// or '__auto_type'?  AutoTypeKeyword value.
  unsigned Keyword : 2;
};

class SubstTemplateTypeParmPackTypeBitfields {
  friend class SubstTemplateTypeParmPackType;

  unsigned : NumTypeBits;

  /// The number of template arguments in \c Arguments, which is
  /// expected to be able to hold at least 1024 according to [implimits].
  /// However as this limit is somewhat easy to hit with template
  /// metaprogramming we'd prefer to keep it as large as possible.
  /// At the moment it has been left as a non-bitfield since this type
  /// safely fits in 64 bits as an unsigned, so there is no reason to
  /// introduce the performance impact of a bitfield.
  unsigned NumArgs;
};

class TemplateSpecializationTypeBitfields {
  friend class TemplateSpecializationType;

  unsigned : NumTypeBits;

  /// Whether this template specialization type is a substituted type alias.
  unsigned TypeAlias : 1;

  /// The number of template arguments named in this class template
  /// specialization, which is expected to be able to hold at least 1024
  /// according to [implimits]. However, as this limit is somewhat easy to
  /// hit with template metaprogramming we'd prefer to keep it as large
  /// as possible. At the moment it has been left as a non-bitfield since
  /// this type safely fits in 64 bits as an unsigned, so there is no reason
  /// to introduce the performance impact of a bitfield.
  unsigned NumArgs;
};

class DependentTemplateSpecializationTypeBitfields {
  friend class DependentTemplateSpecializationType;

  unsigned : NumTypeBits;
  unsigned : NumTypeWithKeywordBits;

  /// The number of template arguments named in this class template
  /// specialization, which is expected to be able to hold at least 1024
  /// according to [implimits]. However, as this limit is somewhat easy to
  /// hit with template metaprogramming we'd prefer to keep it as large
  /// as possible. At the moment it has been left as a non-bitfield since
  /// this type safely fits in 64 bits as an unsigned, so there is no reason
  /// to introduce the performance impact of a bitfield.
  unsigned NumArgs;
};

class PackExpansionTypeBitfields {
  friend class PackExpansionType;

  unsigned : NumTypeBits;

  /// The number of expansions that this pack expansion will
  /// generate when substituted (+1), which is expected to be able to
  /// hold at least 1024 according to [implimits]. However, as this limit
  /// is somewhat easy to hit with template metaprogramming we'd prefer to
  /// keep it as large as possible. At the moment it has been left as a
  /// non-bitfield since this type safely fits in 64 bits as an unsigned, so
  /// there is no reason to introduce the performance impact of a bitfield.
  ///
  /// This field will only have a non-zero value when some of the parameter
  /// packs that occur within the pattern have been substituted but others
  /// have not.
  unsigned NumExpansions;
};

union {
  TypeBitfields TypeBits;
  ArrayTypeBitfields ArrayTypeBits;
  ConstantArrayTypeBitfields ConstantArrayTypeBits;
  AttributedTypeBitfields AttributedTypeBits;
  AutoTypeBitfields AutoTypeBits;
  BuiltinTypeBitfields BuiltinTypeBits;
  FunctionTypeBitfields FunctionTypeBits;
  ObjCObjectTypeBitfields ObjCObjectTypeBits;
  ReferenceTypeBitfields ReferenceTypeBits;
  TypeWithKeywordBitfields TypeWithKeywordBits;
  ElaboratedTypeBitfields ElaboratedTypeBits;
  VectorTypeBitfields VectorTypeBits;
  SubstTemplateTypeParmPackTypeBitfields SubstTemplateTypeParmPackTypeBits;
  TemplateSpecializationTypeBitfields TemplateSpecializationTypeBits;
  DependentTemplateSpecializationTypeBitfields
    DependentTemplateSpecializationTypeBits;
  PackExpansionTypeBitfields PackExpansionTypeBits;

  static_assert(sizeof(TypeBitfields) <= 8,
                "TypeBitfields is larger than 8 bytes!");
  static_assert(sizeof(ArrayTypeBitfields) <= 8,
                "ArrayTypeBitfields is larger than 8 bytes!");
  static_assert(sizeof(AttributedTypeBitfields) <= 8,
                "AttributedTypeBitfields is larger than 8 bytes!");
  static_assert(sizeof(AutoTypeBitfields) <= 8,
                "AutoTypeBitfields is larger than 8 bytes!");
  static_assert(sizeof(BuiltinTypeBitfields) <= 8,
                "BuiltinTypeBitfields is larger than 8 bytes!");
  static_assert(sizeof(FunctionTypeBitfields) <= 8,
                "FunctionTypeBitfields is larger than 8 bytes!");
  static_assert(sizeof(ObjCObjectTypeBitfields) <= 8,
                "ObjCObjectTypeBitfields is larger than 8 bytes!");
  static_assert(sizeof(ReferenceTypeBitfields) <= 8,
                "ReferenceTypeBitfields is larger than 8 bytes!");
  static_assert(sizeof(TypeWithKeywordBitfields) <= 8,
                "TypeWithKeywordBitfields is larger than 8 bytes!");
  static_assert(sizeof(ElaboratedTypeBitfields) <= 8,
                "ElaboratedTypeBitfields is larger than 8 bytes!");
  static_assert(sizeof(VectorTypeBitfields) <= 8,
                "VectorTypeBitfields is larger than 8 bytes!");
  static_assert(sizeof(SubstTemplateTypeParmPackTypeBitfields) <= 8,
                "SubstTemplateTypeParmPackTypeBitfields is larger"
                " than 8 bytes!");
  static_assert(sizeof(TemplateSpecializationTypeBitfields) <= 8,
                "TemplateSpecializationTypeBitfields is larger"
                " than 8 bytes!");
  static_assert(sizeof(DependentTemplateSpecializationTypeBitfields) <= 8,
                "DependentTemplateSpecializationTypeBitfields is larger"
                " than 8 bytes!");
  static_assert(sizeof(PackExpansionTypeBitfields) <= 8,
                "PackExpansionTypeBitfields is larger than 8 bytes");
};

1810private:
template <class T> friend class TypePropertyCache;

/// Set whether this type comes from an AST file.
void setFromAST(bool V = true) const {
  TypeBits.FromAST = V;
}

1818protected:
friend class ASTContext;

Type(TypeClass tc, QualType canon, bool Dependent,
     bool InstantiationDependent, bool VariablyModified,
     bool ContainsUnexpandedParameterPack)
    : ExtQualsTypeCommonBase(this,
                             canon.isNull() ? QualType(this_(), 0) : canon) {
  TypeBits.TC = tc;
  TypeBits.Dependent = Dependent;
  TypeBits.InstantiationDependent = Dependent || InstantiationDependent;
  TypeBits.VariablyModified = VariablyModified;
  TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack;
  TypeBits.CacheValid = false;
  TypeBits.CachedLocalOrUnnamed = false;
  TypeBits.CachedLinkage = NoLinkage;
  TypeBits.FromAST = false;
}

// silence VC++ warning C4355: 'this' : used in base member initializer list
Type *this_() { return this; }

void setDependent(bool D = true) {
  TypeBits.Dependent = D;
  if (D)
    TypeBits.InstantiationDependent = true;
}

void setInstantiationDependent(bool D = true) {
  TypeBits.InstantiationDependent = D; }

void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; }

void setContainsUnexpandedParameterPack(bool PP = true) {
  TypeBits.ContainsUnexpandedParameterPack = PP;
}

1855public:
friend class ASTReader;
friend class ASTWriter;
template <class T> friend class serialization::AbstractTypeReader;
template <class T> friend class serialization::AbstractTypeWriter;

Type(const Type &) = delete;
Type(Type &&) = delete;
Type &operator=(const Type &) = delete;
Type &operator=(Type &&) = delete;

TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); }

/// Whether this type comes from an AST file.
bool isFromAST() const { return TypeBits.FromAST; }

/// Whether this type is or contains an unexpanded parameter
/// pack, used to support C++0x variadic templates.
///
/// A type that contains a parameter pack shall be expanded by the
/// ellipsis operator at some point. For example, the typedef in the
/// following example contains an unexpanded parameter pack 'T':
///
/// \code
/// template<typename ...T>
/// struct X {
///   typedef T* pointer_types; // ill-formed; T is a parameter pack.
/// };
/// \endcode
///
/// Note that this routine does not specify which
bool containsUnexpandedParameterPack() const {
  return TypeBits.ContainsUnexpandedParameterPack;
}

/// Determines if this type would be canonical if it had no further
/// qualification.
bool isCanonicalUnqualified() const {
  return CanonicalType == QualType(this, 0);
}

/// Pull a single level of sugar off of this locally-unqualified type.
/// Users should generally prefer SplitQualType::getSingleStepDesugaredType()
/// or QualType::getSingleStepDesugaredType(const ASTContext&).
QualType getLocallyUnqualifiedSingleStepDesugaredType() const;

/// Types are partitioned into 3 broad categories (C99 6.2.5p1):
/// object types, function types, and incomplete types.

/// Return true if this is an incomplete type.
/// A type that can describe objects, but which lacks information needed to
/// determine its size (e.g. void, or a fwd declared struct). Clients of this
/// routine will need to determine if the size is actually required.
///
/// Def If non-null, and the type refers to some kind of declaration
/// that can be completed (such as a C struct, C++ class, or Objective-C
/// class), will be set to the declaration.
bool isIncompleteType(NamedDecl **Def = nullptr) const;

/// Return true if this is an incomplete or object
/// type, in other words, not a function type.
bool isIncompleteOrObjectType() const {
  return !isFunctionType();
}

/// Determine whether this type is an object type.
bool isObjectType() const {
  // C++ [basic.types]p8:
  //   An object type is a (possibly cv-qualified) type that is not a
  //   function type, not a reference type, and not a void type.
  return !isReferenceType() && !isFunctionType() && !isVoidType();
}

/// Return true if this is a literal type
/// (C++11 [basic.types]p10)
bool isLiteralType(const ASTContext &Ctx) const;

/// Test if this type is a standard-layout type.
/// (C++0x [basic.type]p9)
bool isStandardLayoutType() const;

/// Helper methods to distinguish type categories. All type predicates
/// operate on the canonical type, ignoring typedefs and qualifiers.

/// Returns true if the type is a builtin type.
bool isBuiltinType() const;

/// Test for a particular builtin type.
bool isSpecificBuiltinType(unsigned K) const;

/// Test for a type which does not represent an actual type-system type but
/// is instead used as a placeholder for various convenient purposes within
/// Clang.  All such types are BuiltinTypes.
bool isPlaceholderType() const;
const BuiltinType *getAsPlaceholderType() const;

/// Test for a specific placeholder type.
bool isSpecificPlaceholderType(unsigned K) const;

/// Test for a placeholder type other than Overload; see
/// BuiltinType::isNonOverloadPlaceholderType.
bool isNonOverloadPlaceholderType() const;

/// isIntegerType() does *not* include complex integers (a GCC extension).
/// isComplexIntegerType() can be used to test for complex integers.
bool isIntegerType() const;     // C99 6.2.5p17 (int, char, bool, enum)
bool isEnumeralType() const;

/// Determine whether this type is a scoped enumeration type.
bool isScopedEnumeralType() const;
bool isBooleanType() const;
bool isCharType() const;
bool isWideCharType() const;
bool isChar8Type() const;
bool isChar16Type() const;
bool isChar32Type() const;
bool isAnyCharacterType() const;
bool isIntegralType(const ASTContext &Ctx) const;

/// Determine whether this type is an integral or enumeration type.
bool isIntegralOrEnumerationType() const;

/// Determine whether this type is an integral or unscoped enumeration type.
bool isIntegralOrUnscopedEnumerationType() const;
bool isUnscopedEnumerationType() const;

/// Floating point categories.
bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double)
/// isComplexType() does *not* include complex integers (a GCC extension).
/// isComplexIntegerType() can be used to test for complex integers.
bool isComplexType() const;      // C99 6.2.5p11 (complex)
bool isAnyComplexType() const;   // C99 6.2.5p11 (complex) + Complex Int.
bool isFloatingType() const;     // C99 6.2.5p11 (real floating + complex)
bool isHalfType() const;         // OpenCL 6.1.1.1, NEON (IEEE 754-2008 half)
bool isFloat16Type() const;      // C11 extension ISO/IEC TS 18661
bool isFloat128Type() const;
bool isRealType() const;         // C99 6.2.5p17 (real floating + integer)
bool isArithmeticType() const;   // C99 6.2.5p18 (integer + floating)
bool isVoidType() const;         // C99 6.2.5p19
bool isScalarType() const;       // C99 6.2.5p21 (arithmetic + pointers)
bool isAggregateType() const;
bool isFundamentalType() const;
bool isCompoundType() const;

// Type Predicates: Check to see if this type is structurally the specified
// type, ignoring typedefs and qualifiers.
bool isFunctionType() const;
bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); }
bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); }
bool isPointerType() const;
bool isAnyPointerType() const;   // Any C pointer or ObjC object pointer
bool isBlockPointerType() const;
bool isVoidPointerType() const;
bool isReferenceType() const;
bool isLValueReferenceType() const;
bool isRValueReferenceType() const;
bool isObjectPointerType() const;
bool isFunctionPointerType() const;
bool isFunctionReferenceType() const;
bool isMemberPointerType() const;
bool isMemberFunctionPointerType() const;
bool isMemberDataPointerType() const;
bool isArrayType() const;
bool isConstantArrayType() const;
bool isIncompleteArrayType() const;
bool isVariableArrayType() const;
bool isDependentSizedArrayType() const;
bool isRecordType() const;
bool isClassType() const;
bool isStructureType() const;
bool isObjCBoxableRecordType() const;
bool isInterfaceType() const;
bool isStructureOrClassType() const;
bool isUnionType() const;
bool isComplexIntegerType() const;            // GCC _Complex integer type.
bool isVectorType() const;                    // GCC vector type.
bool isExtVectorType() const;                 // Extended vector type.
bool isDependentAddressSpaceType() const;     // value-dependent address space qualifier
bool isObjCObjectPointerType() const;         // pointer to ObjC object
bool isObjCRetainableType() const;            // ObjC object or block pointer
bool isObjCLifetimeType() const;              // (array of)* retainable type
bool isObjCIndirectLifetimeType() const;      // (pointer to)* lifetime type
bool isObjCNSObjectType() const;              // __attribute__((NSObject))
bool isObjCIndependentClassType() const;      // __attribute__((objc_independent_class))
// FIXME: change this to 'raw' interface type, so we can used 'interface' type
// for the common case.
bool isObjCObjectType() const;                // NSString or typeof(*(id)0)
bool isObjCQualifiedInterfaceType() const;    // NSString<foo>
bool isObjCQualifiedIdType() const;           // id<foo>
bool isObjCQualifiedClassType() const;        // Class<foo>
bool isObjCObjectOrInterfaceType() const;
bool isObjCIdType() const;                    // id
bool isDecltypeType() const;
/// Was this type written with the special inert-in-ARC __unsafe_unretained
/// qualifier?
///
/// This approximates the answer to the following question: if this
/// translation unit were compiled in ARC, would this type be qualified
/// with __unsafe_unretained?
bool isObjCInertUnsafeUnretainedType() const {
  return hasAttr(attr::ObjCInertUnsafeUnretained);
}

/// Whether the type is Objective-C 'id' or a __kindof type of an
/// object type, e.g., __kindof NSView * or __kindof id
/// <NSCopying>.
///
/// \param bound Will be set to the bound on non-id subtype types,
/// which will be (possibly specialized) Objective-C class type, or
/// null for 'id.
bool isObjCIdOrObjectKindOfType(const ASTContext &ctx,
                                const ObjCObjectType *&bound) const;

bool isObjCClassType() const;                 // Class

/// Whether the type is Objective-C 'Class' or a __kindof type of an
/// Class type, e.g., __kindof Class <NSCopying>.
///
/// Unlike \c isObjCIdOrObjectKindOfType, there is no relevant bound
/// here because Objective-C's type system cannot express "a class
/// object for a subclass of NSFoo".
bool isObjCClassOrClassKindOfType() const;

bool isBlockCompatibleObjCPointerType(ASTContext &ctx) const;
bool isObjCSelType() const;                 // Class
bool isObjCBuiltinType() const;               // 'id' or 'Class'
bool isObjCARCBridgableType() const;
bool isCARCBridgableType() const;
bool isTemplateTypeParmType() const;          // C++ template type parameter
bool isNullPtrType() const;                   // C++11 std::nullptr_t
bool isNothrowT() const;                      // C++   std::nothrow_t
bool isAlignValT() const;                     // C++17 std::align_val_t
bool isStdByteType() const;                   // C++17 std::byte
bool isAtomicType() const;                    // C11 _Atomic()
bool isUndeducedAutoType() const;             // C++11 auto or
                                              // C++14 decltype(auto)

2092#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
bool is##Id##Type() const;
2094#include "clang/Basic/OpenCLImageTypes.def"

bool isImageType() const;                     // Any OpenCL image type

bool isSamplerT() const;                      // OpenCL sampler_t
bool isEventT() const;                        // OpenCL event_t
bool isClkEventT() const;                     // OpenCL clk_event_t
bool isQueueT() const;                        // OpenCL queue_t
bool isReserveIDT() const;                    // OpenCL reserve_id_t

2104#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
bool is##Id##Type() const;
2106#include "clang/Basic/OpenCLExtensionTypes.def"
// Type defined in cl_intel_device_side_avc_motion_estimation OpenCL extension
bool isOCLIntelSubgroupAVCType() const;
bool isOCLExtOpaqueType() const;              // Any OpenCL extension type

bool isPipeType() const;                      // OpenCL pipe type
bool isOpenCLSpecificType() const;            // Any OpenCL specific type

/// Determines if this type, which must satisfy
/// isObjCLifetimeType(), is implicitly __unsafe_unretained rather
/// than implicitly __strong.
bool isObjCARCImplicitlyUnretainedType() const;

/// Return the implicit lifetime for this type, which must not be dependent.
Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const;

enum ScalarTypeKind {
  STK_CPointer,
  STK_BlockPointer,
  STK_ObjCObjectPointer,
  STK_MemberPointer,
  STK_Bool,
  STK_Integral,
  STK_Floating,
  STK_IntegralComplex,
  STK_FloatingComplex,
  STK_FixedPoint
};

/// Given that this is a scalar type, classify it.
ScalarTypeKind getScalarTypeKind() const;

/// Whether this type is a dependent type, meaning that its definition
/// somehow depends on a template parameter (C++ [temp.dep.type]).
bool isDependentType() const { return TypeBits.Dependent; }

/// Determine whether this type is an instantiation-dependent type,
/// meaning that the type involves a template parameter (even if the
/// definition does not actually depend on the type substituted for that
/// template parameter).
bool isInstantiationDependentType() const {
  return TypeBits.InstantiationDependent;
}

/// Determine whether this type is an undeduced type, meaning that
/// it somehow involves a C++11 'auto' type or similar which has not yet been
/// deduced.
bool isUndeducedType() const;

/// Whether this type is a variably-modified type (C99 6.7.5).
bool isVariablyModifiedType() const { return TypeBits.VariablyModified; }

/// Whether this type involves a variable-length array type
/// with a definite size.
bool hasSizedVLAType() const;

/// Whether this type is or contains a local or unnamed type.
bool hasUnnamedOrLocalType() const;

bool isOverloadableType() const;

/// Determine wither this type is a C++ elaborated-type-specifier.
bool isElaboratedTypeSpecifier() const;

bool canDecayToPointerType() const;

/// Whether this type is represented natively as a pointer.  This includes
/// pointers, references, block pointers, and Objective-C interface,
/// qualified id, and qualified interface types, as well as nullptr_t.
bool hasPointerRepresentation() const;

/// Whether this type can represent an objective pointer type for the
/// purpose of GC'ability
bool hasObjCPointerRepresentation() const;

/// Determine whether this type has an integer representation
/// of some sort, e.g., it is an integer type or a vector.
bool hasIntegerRepresentation() const;

/// Determine whether this type has an signed integer representation
/// of some sort, e.g., it is an signed integer type or a vector.
bool hasSignedIntegerRepresentation() const;

/// Determine whether this type has an unsigned integer representation
/// of some sort, e.g., it is an unsigned integer type or a vector.
bool hasUnsignedIntegerRepresentation() const;

/// Determine whether this type has a floating-point representation
/// of some sort, e.g., it is a floating-point type or a vector thereof.
bool hasFloatingRepresentation() const;

// Type Checking Functions: Check to see if this type is structurally the
// specified type, ignoring typedefs and qualifiers, and return a pointer to
// the best type we can.
const RecordType *getAsStructureType() const;
/// NOTE: getAs*ArrayType are methods on ASTContext.
const RecordType *getAsUnionType() const;
const ComplexType *getAsComplexIntegerType() const; // GCC complex int type.
const ObjCObjectType *getAsObjCInterfaceType() const;

// The following is a convenience method that returns an ObjCObjectPointerType
// for object declared using an interface.
const ObjCObjectPointerType *getAsObjCInterfacePointerType() const;
const ObjCObjectPointerType *getAsObjCQualifiedIdType() const;
const ObjCObjectPointerType *getAsObjCQualifiedClassType() const;
const ObjCObjectType *getAsObjCQualifiedInterfaceType() const;

/// Retrieves the CXXRecordDecl that this type refers to, either
/// because the type is a RecordType or because it is the injected-class-name
/// type of a class template or class template partial specialization.
CXXRecordDecl *getAsCXXRecordDecl() const;

/// Retrieves the RecordDecl this type refers to.
RecordDecl *getAsRecordDecl() const;

/// Retrieves the TagDecl that this type refers to, either
/// because the type is a TagType or because it is the injected-class-name
/// type of a class template or class template partial specialization.
TagDecl *getAsTagDecl() const;

/// If this is a pointer or reference to a RecordType, return the
/// CXXRecordDecl that the type refers to.
///
/// If this is not a pointer or reference, or the type being pointed to does
/// not refer to a CXXRecordDecl, returns NULL.
const CXXRecordDecl *getPointeeCXXRecordDecl() const;

/// Get the DeducedType whose type will be deduced for a variable with
/// an initializer of this type. This looks through declarators like pointer
/// types, but not through decltype or typedefs.
DeducedType *getContainedDeducedType() const;

/// Get the AutoType whose type will be deduced for a variable with
/// an initializer of this type. This looks through declarators like pointer
/// types, but not through decltype or typedefs.
AutoType *getContainedAutoType() const {
  return dyn_cast_or_null<AutoType>(getContainedDeducedType());
}

/// Determine whether this type was written with a leading 'auto'
/// corresponding to a trailing return type (possibly for a nested
/// function type within a pointer to function type or similar).
bool hasAutoForTrailingReturnType() const;

/// Member-template getAs<specific type>'.  Look through sugar for
/// an instance of \<specific type>.   This scheme will eventually
/// replace the specific getAsXXXX methods above.
///
/// There are some specializations of this member template listed
/// immediately following this class.
template <typename T> const T *getAs() const;

/// Member-template getAsAdjusted<specific type>. Look through specific kinds
/// of sugar (parens, attributes, etc) for an instance of \<specific type>.
/// This is used when you need to walk over sugar nodes that represent some
/// kind of type adjustment from a type that was written as a \<specific type>
/// to another type that is still canonically a \<specific type>.
template <typename T> const T *getAsAdjusted() const;

/// A variant of getAs<> for array types which silently discards
/// qualifiers from the outermost type.
const ArrayType *getAsArrayTypeUnsafe() const;

/// Member-template castAs<specific type>.  Look through sugar for
/// the underlying instance of \<specific type>.
///
/// This method has the same relationship to getAs<T> as cast<T> has
/// to dyn_cast<T>; which is to say, the underlying type *must*
/// have the intended type, and this method will never return null.
template <typename T> const T *castAs() const;

/// A variant of castAs<> for array type which silently discards
/// qualifiers from the outermost type.
const ArrayType *castAsArrayTypeUnsafe() const;

/// Determine whether this type had the specified attribute applied to it
/// (looking through top-level type sugar).
bool hasAttr(attr::Kind AK) const;

/// Get the base element type of this type, potentially discarding type
/// qualifiers.  This should never be used when type qualifiers
/// are meaningful.
const Type *getBaseElementTypeUnsafe() const;

/// If this is an array type, return the element type of the array,
/// potentially with type qualifiers missing.
/// This should never be used when type qualifiers are meaningful.
const Type *getArrayElementTypeNoTypeQual() const;

/// If this is a pointer type, return the pointee type.
/// If this is an array type, return the array element type.
/// This should never be used when type qualifiers are meaningful.
const Type *getPointeeOrArrayElementType() const;

/// If this is a pointer, ObjC object pointer, or block
/// pointer, this returns the respective pointee.
QualType getPointeeType() const;

/// Return the specified type with any "sugar" removed from the type,
/// removing any typedefs, typeofs, etc., as well as any qualifiers.
const Type *getUnqualifiedDesugaredType() const;

/// More type predicates useful for type checking/promotion
bool isPromotableIntegerType() const; // C99 6.3.1.1p2

/// Return true if this is an integer type that is
/// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..],
/// or an enum decl which has a signed representation.
bool isSignedIntegerType() const;

/// Return true if this is an integer type that is
/// unsigned, according to C99 6.2.5p6 [which returns true for _Bool],
/// or an enum decl which has an unsigned representation.
bool isUnsignedIntegerType() const;

/// Determines whether this is an integer type that is signed or an
/// enumeration types whose underlying type is a signed integer type.
bool isSignedIntegerOrEnumerationType() const;

/// Determines whether this is an integer type that is unsigned or an
/// enumeration types whose underlying type is a unsigned integer type.
bool isUnsignedIntegerOrEnumerationType() const;

/// Return true if this is a fixed point type according to
/// ISO/IEC JTC1 SC22 WG14 N1169.
bool isFixedPointType() const;

/// Return true if this is a fixed point or integer type.
bool isFixedPointOrIntegerType() const;

/// Return true if this is a saturated fixed point type according to
/// ISO/IEC JTC1 SC22 WG14 N1169. This type can be signed or unsigned.
bool isSaturatedFixedPointType() const;

/// Return true if this is a saturated fixed point type according to
/// ISO/IEC JTC1 SC22 WG14 N1169. This type can be signed or unsigned.
bool isUnsaturatedFixedPointType() const;

/// Return true if this is a fixed point type that is signed according
/// to ISO/IEC JTC1 SC22 WG14 N1169. This type can also be saturated.
bool isSignedFixedPointType() const;

/// Return true if this is a fixed point type that is unsigned according
/// to ISO/IEC JTC1 SC22 WG14 N1169. This type can also be saturated.
bool isUnsignedFixedPointType() const;

/// Return true if this is not a variable sized type,
/// according to the rules of C99 6.7.5p3.  It is not legal to call this on
/// incomplete types.
bool isConstantSizeType() const;

/// Returns true if this type can be represented by some
/// set of type specifiers.
bool isSpecifierType() const;

/// Determine the linkage of this type.
Linkage getLinkage() const;

/// Determine the visibility of this type.
Visibility getVisibility() const {
  return getLinkageAndVisibility().getVisibility();
}

/// Return true if the visibility was explicitly set is the code.
bool isVisibilityExplicit() const {
  return getLinkageAndVisibility().isVisibilityExplicit();
}

/// Determine the linkage and visibility of this type.
LinkageInfo getLinkageAndVisibility() const;

/// True if the computed linkage is valid. Used for consistency
/// checking. Should always return true.
bool isLinkageValid() const;

/// Determine the nullability of the given type.
///
/// Note that nullability is only captured as sugar within the type
/// system, not as part of the canonical type, so nullability will
/// be lost by canonicalization and desugaring.
Optional<NullabilityKind> getNullability(const ASTContext &context) const;

/// Determine whether the given type can have a nullability
/// specifier applied to it, i.e., if it is any kind of pointer type.
///
/// \param ResultIfUnknown The value to return if we don't yet know whether
///        this type can have nullability because it is dependent.
bool canHaveNullability(bool ResultIfUnknown = true) const;

/// Retrieve the set of substitutions required when accessing a member
/// of the Objective-C receiver type that is declared in the given context.
///
/// \c *this is the type of the object we're operating on, e.g., the
/// receiver for a message send or the base of a property access, and is
/// expected to be of some object or object pointer type.
///
/// \param dc The declaration context for which we are building up a
/// substitution mapping, which should be an Objective-C class, extension,
/// category, or method within.
///
/// \returns an array of type arguments that can be substituted for
/// the type parameters of the given declaration context in any type described
/// within that context, or an empty optional to indicate that no
/// substitution is required.
Optional<ArrayRef<QualType>>
getObjCSubstitutions(const DeclContext *dc) const;

/// Determines if this is an ObjC interface type that may accept type
/// parameters.
bool acceptsObjCTypeParams() const;

const char *getTypeClassName() const;

QualType getCanonicalTypeInternal() const {
  return CanonicalType;
}

CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h
void dump() const;
void dump(llvm::raw_ostream &OS) const;
2426};

2428/// This will check for a TypedefType by removing any existing sugar
2429/// until it reaches a TypedefType or a non-sugared type.
2430template <> const TypedefType *Type::getAs() const;

2432/// This will check for a TemplateSpecializationType by removing any
2433/// existing sugar until it reaches a TemplateSpecializationType or a
2434/// non-sugared type.
2435template <> const TemplateSpecializationType *Type::getAs() const;

2437/// This will check for an AttributedType by removing any existing sugar
2438/// until it reaches an AttributedType or a non-sugared type.
2439template <> const AttributedType *Type::getAs() const;

2441// We can do canonical leaf types faster, because we don't have to
2442// worry about preserving child type decoration.
2443#define TYPE(Class, Base)
2444#define LEAF_TYPE(Class) \
2445template <> inline const Class##Type *Type::getAs() const { \
return dyn_cast<Class##Type>(CanonicalType); \
2447} \
2448template <> inline const Class##Type *Type::castAs() const { \
return cast<Class##Type>(CanonicalType); \
2450}
2451#include "clang/AST/TypeNodes.inc"

2453/// This class is used for builtin types like 'int'.  Builtin
2454/// types are always canonical and have a literal name field.
2455class BuiltinType : public Type {
2456public:
enum Kind {
2458// OpenCL image types
2459#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) Id,
2460#include "clang/Basic/OpenCLImageTypes.def"
2461// OpenCL extension types
2462#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) Id,
2463#include "clang/Basic/OpenCLExtensionTypes.def"
2464// SVE Types
2465#define SVE_TYPE(Name, Id, SingletonId) Id,
2466#include "clang/Basic/AArch64SVEACLETypes.def"
2467// All other builtin types
2468#define BUILTIN_TYPE(Id, SingletonId) Id,
2469#define LAST_BUILTIN_TYPE(Id) LastKind = Id
2470#include "clang/AST/BuiltinTypes.def"
};

2473private:
friend class ASTContext; // ASTContext creates these.

BuiltinType(Kind K)
    : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent),
           /*InstantiationDependent=*/(K == Dependent),
           /*VariablyModified=*/false,
           /*Unexpanded parameter pack=*/false) {
  BuiltinTypeBits.Kind = K;
}

2484public:
Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); }
StringRef getName(const PrintingPolicy &Policy) const;

const char *getNameAsCString(const PrintingPolicy &Policy) const {
  // The StringRef is null-terminated.
  StringRef str = getName(Policy);
  assert(!str.empty() && str.data()[str.size()] == '\0')((!str.empty() && str.data()[str.size()] == '\0') ? static_cast
<void> (0) : __assert_fail ("!str.empty() && str.data()[str.size()] == '\\0'"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 2491, __PRETTY_FUNCTION__));
  return str.data();
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

bool isInteger() const {
  return getKind() >= Bool && getKind() <= Int128;
}

bool isSignedInteger() const {
  return getKind() >= Char_S && getKind() <= Int128;
}

bool isUnsignedInteger() const {
  return getKind() >= Bool && getKind() <= UInt128;
}

bool isFloatingPoint() const {
  return getKind() >= Half && getKind() <= Float128;
}

/// Determines whether the given kind corresponds to a placeholder type.
static bool isPlaceholderTypeKind(Kind K) {
  return K >= Overload;
}

/// Determines whether this type is a placeholder type, i.e. a type
/// which cannot appear in arbitrary positions in a fully-formed
/// expression.
bool isPlaceholderType() const {
  return isPlaceholderTypeKind(getKind());
}

/// Determines whether this type is a placeholder type other than
/// Overload.  Most placeholder types require only syntactic
/// information about their context in order to be resolved (e.g.
/// whether it is a call expression), which means they can (and
/// should) be resolved in an earlier "phase" of analysis.
/// Overload expressions sometimes pick up further information
/// from their context, like whether the context expects a
/// specific function-pointer type, and so frequently need
/// special treatment.
bool isNonOverloadPlaceholderType() const {
  return getKind() > Overload;
}

static bool classof(const Type *T) { return T->getTypeClass() == Builtin; }
2540};

2542/// Complex values, per C99 6.2.5p11.  This supports the C99 complex
2543/// types (_Complex float etc) as well as the GCC integer complex extensions.
2544class ComplexType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these.

QualType ElementType;

ComplexType(QualType Element, QualType CanonicalPtr)
    : Type(Complex, CanonicalPtr, Element->isDependentType(),
           Element->isInstantiationDependentType(),
           Element->isVariablyModifiedType(),
           Element->containsUnexpandedParameterPack()),
      ElementType(Element) {}

2556public:
QualType getElementType() const { return ElementType; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getElementType());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) {
  ID.AddPointer(Element.getAsOpaquePtr());
}

static bool classof(const Type *T) { return T->getTypeClass() == Complex; }
2571};

2573/// Sugar for parentheses used when specifying types.
2574class ParenType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these.

QualType Inner;

ParenType(QualType InnerType, QualType CanonType)
    : Type(Paren, CanonType, InnerType->isDependentType(),
           InnerType->isInstantiationDependentType(),
           InnerType->isVariablyModifiedType(),
           InnerType->containsUnexpandedParameterPack()),
      Inner(InnerType) {}

2586public:
QualType getInnerType() const { return Inner; }

bool isSugared() const { return true; }
QualType desugar() const { return getInnerType(); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getInnerType());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) {
  Inner.Profile(ID);
}

static bool classof(const Type *T) { return T->getTypeClass() == Paren; }
2601};

2603/// PointerType - C99 6.7.5.1 - Pointer Declarators.
2604class PointerType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these.

QualType PointeeType;

PointerType(QualType Pointee, QualType CanonicalPtr)
    : Type(Pointer, CanonicalPtr, Pointee->isDependentType(),
           Pointee->isInstantiationDependentType(),
           Pointee->isVariablyModifiedType(),
           Pointee->containsUnexpandedParameterPack()),
      PointeeType(Pointee) {}

2616public:
QualType getPointeeType() const { return PointeeType; }

/// Returns true if address spaces of pointers overlap.
/// OpenCL v2.0 defines conversion rules for pointers to different
/// address spaces (OpenCLC v2.0 s6.5.5) and notion of overlapping
/// address spaces.
/// CL1.1 or CL1.2:
///   address spaces overlap iff they are they same.
/// CL2.0 adds:
///   __generic overlaps with any address space except for __constant.
bool isAddressSpaceOverlapping(const PointerType &other) const {
  Qualifiers thisQuals = PointeeType.getQualifiers();
  Qualifiers otherQuals = other.getPointeeType().getQualifiers();
  // Address spaces overlap if at least one of them is a superset of another
  return thisQuals.isAddressSpaceSupersetOf(otherQuals) ||
         otherQuals.isAddressSpaceSupersetOf(thisQuals);
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getPointeeType());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) {
  ID.AddPointer(Pointee.getAsOpaquePtr());
}

static bool classof(const Type *T) { return T->getTypeClass() == Pointer; }
2647};

2649/// Represents a type which was implicitly adjusted by the semantic
2650/// engine for arbitrary reasons.  For example, array and function types can
2651/// decay, and function types can have their calling conventions adjusted.
2652class AdjustedType : public Type, public llvm::FoldingSetNode {
QualType OriginalTy;
QualType AdjustedTy;

2656protected:
friend class ASTContext; // ASTContext creates these.

AdjustedType(TypeClass TC, QualType OriginalTy, QualType AdjustedTy,
             QualType CanonicalPtr)
    : Type(TC, CanonicalPtr, OriginalTy->isDependentType(),
           OriginalTy->isInstantiationDependentType(),
           OriginalTy->isVariablyModifiedType(),
           OriginalTy->containsUnexpandedParameterPack()),
      OriginalTy(OriginalTy), AdjustedTy(AdjustedTy) {}

2667public:
QualType getOriginalType() const { return OriginalTy; }
QualType getAdjustedType() const { return AdjustedTy; }

bool isSugared() const { return true; }
QualType desugar() const { return AdjustedTy; }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, OriginalTy, AdjustedTy);
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType Orig, QualType New) {
  ID.AddPointer(Orig.getAsOpaquePtr());
  ID.AddPointer(New.getAsOpaquePtr());
}

static bool classof(const Type *T) {
  return T->getTypeClass() == Adjusted || T->getTypeClass() == Decayed;
}
2686};

2688/// Represents a pointer type decayed from an array or function type.
2689class DecayedType : public AdjustedType {
friend class ASTContext; // ASTContext creates these.

inline
DecayedType(QualType OriginalType, QualType Decayed, QualType Canonical);

2695public:
QualType getDecayedType() const { return getAdjustedType(); }

inline QualType getPointeeType() const;

static bool classof(const Type *T) { return T->getTypeClass() == Decayed; }
2701};

2703/// Pointer to a block type.
2704/// This type is to represent types syntactically represented as
2705/// "void (^)(int)", etc. Pointee is required to always be a function type.
2706class BlockPointerType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these.

// Block is some kind of pointer type
QualType PointeeType;

BlockPointerType(QualType Pointee, QualType CanonicalCls)
    : Type(BlockPointer, CanonicalCls, Pointee->isDependentType(),
           Pointee->isInstantiationDependentType(),
           Pointee->isVariablyModifiedType(),
           Pointee->containsUnexpandedParameterPack()),
      PointeeType(Pointee) {}

2719public:
// Get the pointee type. Pointee is required to always be a function type.
QualType getPointeeType() const { return PointeeType; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
    Profile(ID, getPointeeType());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) {
    ID.AddPointer(Pointee.getAsOpaquePtr());
}

static bool classof(const Type *T) {
  return T->getTypeClass() == BlockPointer;
}
2737};

2739/// Base for LValueReferenceType and RValueReferenceType
2740class ReferenceType : public Type, public llvm::FoldingSetNode {
QualType PointeeType;

2743protected:
ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef,
              bool SpelledAsLValue)
    : Type(tc, CanonicalRef, Referencee->isDependentType(),
           Referencee->isInstantiationDependentType(),
           Referencee->isVariablyModifiedType(),
           Referencee->containsUnexpandedParameterPack()),
      PointeeType(Referencee) {
  ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue;
  ReferenceTypeBits.InnerRef = Referencee->isReferenceType();
}

2755public:
bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; }
bool isInnerRef() const { return ReferenceTypeBits.InnerRef; }

QualType getPointeeTypeAsWritten() const { return PointeeType; }

QualType getPointeeType() const {
  // FIXME: this might strip inner qualifiers; okay?
  const ReferenceType *T = this;
  while (T->isInnerRef())
    T = T->PointeeType->castAs<ReferenceType>();
  return T->PointeeType;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, PointeeType, isSpelledAsLValue());
}

static void Profile(llvm::FoldingSetNodeID &ID,
                    QualType Referencee,
                    bool SpelledAsLValue) {
  ID.AddPointer(Referencee.getAsOpaquePtr());
  ID.AddBoolean(SpelledAsLValue);
}

static bool classof(const Type *T) {
  return T->getTypeClass() == LValueReference ||
         T->getTypeClass() == RValueReference;
}
2784};

2786/// An lvalue reference type, per C++11 [dcl.ref].
2787class LValueReferenceType : public ReferenceType {
friend class ASTContext; // ASTContext creates these

LValueReferenceType(QualType Referencee, QualType CanonicalRef,
                    bool SpelledAsLValue)
    : ReferenceType(LValueReference, Referencee, CanonicalRef,
                    SpelledAsLValue) {}

2795public:
bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == LValueReference;
}
2802};

2804/// An rvalue reference type, per C++11 [dcl.ref].
2805class RValueReferenceType : public ReferenceType {
friend class ASTContext; // ASTContext creates these

RValueReferenceType(QualType Referencee, QualType CanonicalRef)
     : ReferenceType(RValueReference, Referencee, CanonicalRef, false) {}

2811public:
bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == RValueReference;
}
2818};

2820/// A pointer to member type per C++ 8.3.3 - Pointers to members.
2821///
2822/// This includes both pointers to data members and pointer to member functions.
2823class MemberPointerType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these.

QualType PointeeType;

/// The class of which the pointee is a member. Must ultimately be a
/// RecordType, but could be a typedef or a template parameter too.
const Type *Class;

MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr)
    : Type(MemberPointer, CanonicalPtr,
           Cls->isDependentType() || Pointee->isDependentType(),
           (Cls->isInstantiationDependentType() ||
            Pointee->isInstantiationDependentType()),
           Pointee->isVariablyModifiedType(),
           (Cls->containsUnexpandedParameterPack() ||
            Pointee->containsUnexpandedParameterPack())),
           PointeeType(Pointee), Class(Cls) {}

2842public:
QualType getPointeeType() const { return PointeeType; }

/// Returns true if the member type (i.e. the pointee type) is a
/// function type rather than a data-member type.
bool isMemberFunctionPointer() const {
  return PointeeType->isFunctionProtoType();
}

/// Returns true if the member type (i.e. the pointee type) is a
/// data type rather than a function type.
bool isMemberDataPointer() const {
  return !PointeeType->isFunctionProtoType();
}

const Type *getClass() const { return Class; }
CXXRecordDecl *getMostRecentCXXRecordDecl() const;

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getPointeeType(), getClass());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee,
                    const Type *Class) {
  ID.AddPointer(Pointee.getAsOpaquePtr());
  ID.AddPointer(Class);
}

static bool classof(const Type *T) {
  return T->getTypeClass() == MemberPointer;
}
2876};

2878/// Represents an array type, per C99 6.7.5.2 - Array Declarators.
2879class ArrayType : public Type, public llvm::FoldingSetNode {
2880public:
/// Capture whether this is a normal array (e.g. int X[4])
/// an array with a static size (e.g. int X[static 4]), or an array
/// with a star size (e.g. int X[*]).
/// 'static' is only allowed on function parameters.
enum ArraySizeModifier {
  Normal, Static, Star
};

2889private:
/// The element type of the array.
QualType ElementType;

2893protected:
friend class ASTContext; // ASTContext creates these.

ArrayType(TypeClass tc, QualType et, QualType can, ArraySizeModifier sm,
          unsigned tq, const Expr *sz = nullptr);

2899public:
QualType getElementType() const { return ElementType; }

ArraySizeModifier getSizeModifier() const {
  return ArraySizeModifier(ArrayTypeBits.SizeModifier);
}

Qualifiers getIndexTypeQualifiers() const {
  return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers());
}

unsigned getIndexTypeCVRQualifiers() const {
  return ArrayTypeBits.IndexTypeQuals;
}

static bool classof(const Type *T) {
  return T->getTypeClass() == ConstantArray ||
         T->getTypeClass() == VariableArray ||
         T->getTypeClass() == IncompleteArray ||
         T->getTypeClass() == DependentSizedArray;
}
2920};

2922/// Represents the canonical version of C arrays with a specified constant size.
2923/// For example, the canonical type for 'int A[4 + 4*100]' is a
2924/// ConstantArrayType where the element type is 'int' and the size is 404.
2925class ConstantArrayType final
  : public ArrayType,
    private llvm::TrailingObjects<ConstantArrayType, const Expr *> {
friend class ASTContext; // ASTContext creates these.
friend TrailingObjects;

llvm::APInt Size; // Allows us to unique the type.

ConstantArrayType(QualType et, QualType can, const llvm::APInt &size,
                  const Expr *sz, ArraySizeModifier sm, unsigned tq)
    : ArrayType(ConstantArray, et, can, sm, tq, sz), Size(size) {
  ConstantArrayTypeBits.HasStoredSizeExpr = sz != nullptr;
  if (ConstantArrayTypeBits.HasStoredSizeExpr) {
    assert(!can.isNull() && "canonical constant array should not have size")((!can.isNull() && "canonical constant array should not have size"
) ? static_cast<void> (0) : __assert_fail ("!can.isNull() && \"canonical constant array should not have size\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 2938, __PRETTY_FUNCTION__));
    *getTrailingObjects<const Expr*>() = sz;
  }
}

unsigned numTrailingObjects(OverloadToken<const Expr*>) const {
  return ConstantArrayTypeBits.HasStoredSizeExpr;
}

2947public:
const llvm::APInt &getSize() const { return Size; }
const Expr *getSizeExpr() const {
  return ConstantArrayTypeBits.HasStoredSizeExpr
             ? *getTrailingObjects<const Expr *>()
             : nullptr;
}
bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

/// Determine the number of bits required to address a member of
// an array with the given element type and number of elements.
static unsigned getNumAddressingBits(const ASTContext &Context,
                                     QualType ElementType,
                                     const llvm::APInt &NumElements);

/// Determine the maximum number of active bits that an array's size
/// can require, which limits the maximum size of the array.
static unsigned getMaxSizeBits(const ASTContext &Context);

void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) {
  Profile(ID, Ctx, getElementType(), getSize(), getSizeExpr(),
          getSizeModifier(), getIndexTypeCVRQualifiers());
}

static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx,
                    QualType ET, const llvm::APInt &ArraySize,
                    const Expr *SizeExpr, ArraySizeModifier SizeMod,
                    unsigned TypeQuals);

static bool classof(const Type *T) {
  return T->getTypeClass() == ConstantArray;
}
2980};

2982/// Represents a C array with an unspecified size.  For example 'int A[]' has
2983/// an IncompleteArrayType where the element type is 'int' and the size is
2984/// unspecified.
2985class IncompleteArrayType : public ArrayType {
friend class ASTContext; // ASTContext creates these.

IncompleteArrayType(QualType et, QualType can,
                    ArraySizeModifier sm, unsigned tq)
    : ArrayType(IncompleteArray, et, can, sm, tq) {}

2992public:
friend class StmtIteratorBase;

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == IncompleteArray;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getElementType(), getSizeModifier(),
          getIndexTypeCVRQualifiers());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType ET,
                    ArraySizeModifier SizeMod, unsigned TypeQuals) {
  ID.AddPointer(ET.getAsOpaquePtr());
  ID.AddInteger(SizeMod);
  ID.AddInteger(TypeQuals);
}
3013};

3015/// Represents a C array with a specified size that is not an
3016/// integer-constant-expression.  For example, 'int s[x+foo()]'.
3017/// Since the size expression is an arbitrary expression, we store it as such.
3018///
3019/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and
3020/// should not be: two lexically equivalent variable array types could mean
3021/// different things, for example, these variables do not have the same type
3022/// dynamically:
3023///
3024/// void foo(int x) {
3025///   int Y[x];
3026///   ++x;
3027///   int Z[x];
3028/// }
3029class VariableArrayType : public ArrayType {
friend class ASTContext; // ASTContext creates these.

/// An assignment-expression. VLA's are only permitted within
/// a function block.
Stmt *SizeExpr;

/// The range spanned by the left and right array brackets.
SourceRange Brackets;

VariableArrayType(QualType et, QualType can, Expr *e,
                  ArraySizeModifier sm, unsigned tq,
                  SourceRange brackets)
    : ArrayType(VariableArray, et, can, sm, tq, e),
      SizeExpr((Stmt*) e), Brackets(brackets) {}

3045public:
friend class StmtIteratorBase;

Expr *getSizeExpr() const {
  // We use C-style casts instead of cast<> here because we do not wish
  // to have a dependency of Type.h on Stmt.h/Expr.h.
  return (Expr*) SizeExpr;
}

SourceRange getBracketsRange() const { return Brackets; }
SourceLocation getLBracketLoc() const { return Brackets.getBegin(); }
SourceLocation getRBracketLoc() const { return Brackets.getEnd(); }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == VariableArray;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  llvm_unreachable("Cannot unique VariableArrayTypes.")::llvm::llvm_unreachable_internal("Cannot unique VariableArrayTypes."
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 3066);
}
3068};

3070/// Represents an array type in C++ whose size is a value-dependent expression.
3071///
3072/// For example:
3073/// \code
3074/// template<typename T, int Size>
3075/// class array {
3076///   T data[Size];
3077/// };
3078/// \endcode
3079///
3080/// For these types, we won't actually know what the array bound is
3081/// until template instantiation occurs, at which point this will
3082/// become either a ConstantArrayType or a VariableArrayType.
3083class DependentSizedArrayType : public ArrayType {
friend class ASTContext; // ASTContext creates these.

const ASTContext &Context;

/// An assignment expression that will instantiate to the
/// size of the array.
///
/// The expression itself might be null, in which case the array
/// type will have its size deduced from an initializer.
Stmt *SizeExpr;

/// The range spanned by the left and right array brackets.
SourceRange Brackets;

DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can,
                        Expr *e, ArraySizeModifier sm, unsigned tq,
                        SourceRange brackets);

3102public:
friend class StmtIteratorBase;

Expr *getSizeExpr() const {
  // We use C-style casts instead of cast<> here because we do not wish
  // to have a dependency of Type.h on Stmt.h/Expr.h.
  return (Expr*) SizeExpr;
}

SourceRange getBracketsRange() const { return Brackets; }
SourceLocation getLBracketLoc() const { return Brackets.getBegin(); }
SourceLocation getRBracketLoc() const { return Brackets.getEnd(); }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == DependentSizedArray;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, Context, getElementType(),
          getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr());
}

static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
                    QualType ET, ArraySizeModifier SizeMod,
                    unsigned TypeQuals, Expr *E);
3130};

3132/// Represents an extended address space qualifier where the input address space
3133/// value is dependent. Non-dependent address spaces are not represented with a
3134/// special Type subclass; they are stored on an ExtQuals node as part of a QualType.
3135///
3136/// For example:
3137/// \code
3138/// template<typename T, int AddrSpace>
3139/// class AddressSpace {
3140///   typedef T __attribute__((address_space(AddrSpace))) type;
3141/// }
3142/// \endcode
3143class DependentAddressSpaceType : public Type, public llvm::FoldingSetNode {
friend class ASTContext;

const ASTContext &Context;
Expr *AddrSpaceExpr;
QualType PointeeType;
SourceLocation loc;

DependentAddressSpaceType(const ASTContext &Context, QualType PointeeType,
                          QualType can, Expr *AddrSpaceExpr,
                          SourceLocation loc);

3155public:
Expr *getAddrSpaceExpr() const { return AddrSpaceExpr; }
QualType getPointeeType() const { return PointeeType; }
SourceLocation getAttributeLoc() const { return loc; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == DependentAddressSpace;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, Context, getPointeeType(), getAddrSpaceExpr());
}

static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
                    QualType PointeeType, Expr *AddrSpaceExpr);
3173};

3175/// Represents an extended vector type where either the type or size is
3176/// dependent.
3177///
3178/// For example:
3179/// \code
3180/// template<typename T, int Size>
3181/// class vector {
3182///   typedef T __attribute__((ext_vector_type(Size))) type;
3183/// }
3184/// \endcode
3185class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode {
friend class ASTContext;

const ASTContext &Context;
Expr *SizeExpr;

/// The element type of the array.
QualType ElementType;

SourceLocation loc;

DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType,
                            QualType can, Expr *SizeExpr, SourceLocation loc);

3199public:
Expr *getSizeExpr() const { return SizeExpr; }
QualType getElementType() const { return ElementType; }
SourceLocation getAttributeLoc() const { return loc; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == DependentSizedExtVector;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, Context, getElementType(), getSizeExpr());
}

static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
                    QualType ElementType, Expr *SizeExpr);
3217};


3220/// Represents a GCC generic vector type. This type is created using
3221/// __attribute__((vector_size(n)), where "n" specifies the vector size in
3222/// bytes; or from an Altivec __vector or vector declaration.
3223/// Since the constructor takes the number of vector elements, the
3224/// client is responsible for converting the size into the number of elements.
3225class VectorType : public Type, public llvm::FoldingSetNode {
3226public:
enum VectorKind {
  /// not a target-specific vector type
  GenericVector,

  /// is AltiVec vector
  AltiVecVector,

  /// is AltiVec 'vector Pixel'
  AltiVecPixel,

  /// is AltiVec 'vector bool ...'
  AltiVecBool,

  /// is ARM Neon vector
  NeonVector,

  /// is ARM Neon polynomial vector
  NeonPolyVector
};

3247protected:
friend class ASTContext; // ASTContext creates these.

/// The element type of the vector.
QualType ElementType;

VectorType(QualType vecType, unsigned nElements, QualType canonType,
           VectorKind vecKind);

VectorType(TypeClass tc, QualType vecType, unsigned nElements,
           QualType canonType, VectorKind vecKind);

3259public:
QualType getElementType() const { return ElementType; }
unsigned getNumElements() const { return VectorTypeBits.NumElements; }

static bool isVectorSizeTooLarge(unsigned NumElements) {
  return NumElements > VectorTypeBitfields::MaxNumElements;
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

VectorKind getVectorKind() const {
  return VectorKind(VectorTypeBits.VecKind);
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getElementType(), getNumElements(),
          getTypeClass(), getVectorKind());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType,
                    unsigned NumElements, TypeClass TypeClass,
                    VectorKind VecKind) {
  ID.AddPointer(ElementType.getAsOpaquePtr());
  ID.AddInteger(NumElements);
  ID.AddInteger(TypeClass);
  ID.AddInteger(VecKind);
}

static bool classof(const Type *T) {
  return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector;
}
3291};

3293/// Represents a vector type where either the type or size is dependent.
3294////
3295/// For example:
3296/// \code
3297/// template<typename T, int Size>
3298/// class vector {
3299///   typedef T __attribute__((vector_size(Size))) type;
3300/// }
3301/// \endcode
3302class DependentVectorType : public Type, public llvm::FoldingSetNode {
friend class ASTContext;

const ASTContext &Context;
QualType ElementType;
Expr *SizeExpr;
SourceLocation Loc;

DependentVectorType(const ASTContext &Context, QualType ElementType,
                         QualType CanonType, Expr *SizeExpr,
                         SourceLocation Loc, VectorType::VectorKind vecKind);

3314public:
Expr *getSizeExpr() const { return SizeExpr; }
QualType getElementType() const { return ElementType; }
SourceLocation getAttributeLoc() const { return Loc; }
VectorType::VectorKind getVectorKind() const {
  return VectorType::VectorKind(VectorTypeBits.VecKind);
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == DependentVector;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, Context, getElementType(), getSizeExpr(), getVectorKind());
}

static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
                    QualType ElementType, const Expr *SizeExpr,
                    VectorType::VectorKind VecKind);
3336};

3338/// ExtVectorType - Extended vector type. This type is created using
3339/// __attribute__((ext_vector_type(n)), where "n" is the number of elements.
3340/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This
3341/// class enables syntactic extensions, like Vector Components for accessing
3342/// points (as .xyzw), colors (as .rgba), and textures (modeled after OpenGL
3343/// Shading Language).
3344class ExtVectorType : public VectorType {
friend class ASTContext; // ASTContext creates these.

ExtVectorType(QualType vecType, unsigned nElements, QualType canonType)
    : VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {}

3350public:
static int getPointAccessorIdx(char c) {
  switch (c) {
  default: return -1;
  case 'x': case 'r': return 0;
  case 'y': case 'g': return 1;
  case 'z': case 'b': return 2;
  case 'w': case 'a': return 3;
  }
}

static int getNumericAccessorIdx(char c) {
  switch (c) {
    default: return -1;
    case '0': return 0;
    case '1': return 1;
    case '2': return 2;
    case '3': return 3;
    case '4': return 4;
    case '5': return 5;
    case '6': return 6;
    case '7': return 7;
    case '8': return 8;
    case '9': return 9;
    case 'A':
    case 'a': return 10;
    case 'B':
    case 'b': return 11;
    case 'C':
    case 'c': return 12;
    case 'D':
    case 'd': return 13;
    case 'E':
    case 'e': return 14;
    case 'F':
    case 'f': return 15;
  }
}

static int getAccessorIdx(char c, bool isNumericAccessor) {
  if (isNumericAccessor)
    return getNumericAccessorIdx(c);
  else
    return getPointAccessorIdx(c);
}

bool isAccessorWithinNumElements(char c, bool isNumericAccessor) const {
  if (int idx = getAccessorIdx(c, isNumericAccessor)+1)
    return unsigned(idx-1) < getNumElements();
  return false;
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == ExtVector;
}
3408};

3410/// FunctionType - C99 6.7.5.3 - Function Declarators.  This is the common base
3411/// class of FunctionNoProtoType and FunctionProtoType.
3412class FunctionType : public Type {
// The type returned by the function.
QualType ResultType;

3416public:
/// Interesting information about a specific parameter that can't simply
/// be reflected in parameter's type. This is only used by FunctionProtoType
/// but is in FunctionType to make this class available during the
/// specification of the bases of FunctionProtoType.
///
/// It makes sense to model language features this way when there's some
/// sort of parameter-specific override (such as an attribute) that
/// affects how the function is called.  For example, the ARC ns_consumed
/// attribute changes whether a parameter is passed at +0 (the default)
/// or +1 (ns_consumed).  This must be reflected in the function type,
/// but isn't really a change to the parameter type.
///
/// One serious disadvantage of modelling language features this way is
/// that they generally do not work with language features that attempt
/// to destructure types.  For example, template argument deduction will
/// not be able to match a parameter declared as
///   T (*)(U)
/// against an argument of type
///   void (*)(__attribute__((ns_consumed)) id)
/// because the substitution of T=void, U=id into the former will
/// not produce the latter.
class ExtParameterInfo {
  enum {
    ABIMask = 0x0F,
    IsConsumed = 0x10,
    HasPassObjSize = 0x20,
    IsNoEscape = 0x40,
  };
  unsigned char Data = 0;

public:
  ExtParameterInfo() = default;

  /// Return the ABI treatment of this parameter.
  ParameterABI getABI() const { return ParameterABI(Data & ABIMask); }
  ExtParameterInfo withABI(ParameterABI kind) const {
    ExtParameterInfo copy = *this;
    copy.Data = (copy.Data & ~ABIMask) | unsigned(kind);
    return copy;
  }

  /// Is this parameter considered "consumed" by Objective-C ARC?
  /// Consumed parameters must have retainable object type.
  bool isConsumed() const { return (Data & IsConsumed); }
  ExtParameterInfo withIsConsumed(bool consumed) const {
    ExtParameterInfo copy = *this;
    if (consumed)
      copy.Data |= IsConsumed;
    else
      copy.Data &= ~IsConsumed;
    return copy;
  }

  bool hasPassObjectSize() const { return Data & HasPassObjSize; }
  ExtParameterInfo withHasPassObjectSize() const {
    ExtParameterInfo Copy = *this;
    Copy.Data |= HasPassObjSize;
    return Copy;
  }

  bool isNoEscape() const { return Data & IsNoEscape; }
  ExtParameterInfo withIsNoEscape(bool NoEscape) const {
    ExtParameterInfo Copy = *this;
    if (NoEscape)
      Copy.Data |= IsNoEscape;
    else
      Copy.Data &= ~IsNoEscape;
    return Copy;
  }

  unsigned char getOpaqueValue() const { return Data; }
  static ExtParameterInfo getFromOpaqueValue(unsigned char data) {
    ExtParameterInfo result;
    result.Data = data;
    return result;
  }

  friend bool operator==(ExtParameterInfo lhs, ExtParameterInfo rhs) {
    return lhs.Data == rhs.Data;
  }

  friend bool operator!=(ExtParameterInfo lhs, ExtParameterInfo rhs) {
    return lhs.Data != rhs.Data;
  }
};

/// A class which abstracts out some details necessary for
/// making a call.
///
/// It is not actually used directly for storing this information in
/// a FunctionType, although FunctionType does currently use the
/// same bit-pattern.
///
// If you add a field (say Foo), other than the obvious places (both,
// constructors, compile failures), what you need to update is
// * Operator==
// * getFoo
// * withFoo
// * functionType. Add Foo, getFoo.
// * ASTContext::getFooType
// * ASTContext::mergeFunctionTypes
// * FunctionNoProtoType::Profile
// * FunctionProtoType::Profile
// * TypePrinter::PrintFunctionProto
// * AST read and write
// * Codegen
class ExtInfo {
  friend class FunctionType;

  // Feel free to rearrange or add bits, but if you go over 12,
  // you'll need to adjust both the Bits field below and
  // Type::FunctionTypeBitfields.

  //   |  CC  |noreturn|produces|nocallersavedregs|regparm|nocfcheck|
  //   |0 .. 4|   5    |    6   |       7         |8 .. 10|    11   |
  //
  // regparm is either 0 (no regparm attribute) or the regparm value+1.
  enum { CallConvMask = 0x1F };
  enum { NoReturnMask = 0x20 };
  enum { ProducesResultMask = 0x40 };
  enum { NoCallerSavedRegsMask = 0x80 };
  enum { NoCfCheckMask = 0x800 };
  enum {
    RegParmMask = ~(CallConvMask | NoReturnMask | ProducesResultMask |
                    NoCallerSavedRegsMask | NoCfCheckMask),
    RegParmOffset = 8
  }; // Assumed to be the last field
  uint16_t Bits = CC_C;

  ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {}

 public:
   // Constructor with no defaults. Use this when you know that you
   // have all the elements (when reading an AST file for example).
   ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc,
           bool producesResult, bool noCallerSavedRegs, bool NoCfCheck) {
     assert((!hasRegParm || regParm < 7) && "Invalid regparm value")(((!hasRegParm || regParm < 7) && "Invalid regparm value"
) ? static_cast<void> (0) : __assert_fail ("(!hasRegParm || regParm < 7) && \"Invalid regparm value\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 3553, __PRETTY_FUNCTION__));
     Bits = ((unsigned)cc) | (noReturn ? NoReturnMask : 0) |
            (producesResult ? ProducesResultMask : 0) |
            (noCallerSavedRegs ? NoCallerSavedRegsMask : 0) |
            (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0) |
            (NoCfCheck ? NoCfCheckMask : 0);
  }

  // Constructor with all defaults. Use when for example creating a
  // function known to use defaults.
  ExtInfo() = default;

  // Constructor with just the calling convention, which is an important part
  // of the canonical type.
  ExtInfo(CallingConv CC) : Bits(CC) {}

  bool getNoReturn() const { return Bits & NoReturnMask; }
  bool getProducesResult() const { return Bits & ProducesResultMask; }
  bool getNoCallerSavedRegs() const { return Bits & NoCallerSavedRegsMask; }
  bool getNoCfCheck() const { return Bits & NoCfCheckMask; }
  bool getHasRegParm() const { return (Bits >> RegParmOffset) != 0; }

  unsigned getRegParm() const {
    unsigned RegParm = (Bits & RegParmMask) >> RegParmOffset;
    if (RegParm > 0)
      --RegParm;
    return RegParm;
  }

  CallingConv getCC() const { return CallingConv(Bits & CallConvMask); }

  bool operator==(ExtInfo Other) const {
    return Bits == Other.Bits;
  }
  bool operator!=(ExtInfo Other) const {
    return Bits != Other.Bits;
  }

  // Note that we don't have setters. That is by design, use
  // the following with methods instead of mutating these objects.

  ExtInfo withNoReturn(bool noReturn) const {
    if (noReturn)
      return ExtInfo(Bits | NoReturnMask);
    else
      return ExtInfo(Bits & ~NoReturnMask);
  }

  ExtInfo withProducesResult(bool producesResult) const {
    if (producesResult)
      return ExtInfo(Bits | ProducesResultMask);
    else
      return ExtInfo(Bits & ~ProducesResultMask);
  }

  ExtInfo withNoCallerSavedRegs(bool noCallerSavedRegs) const {
    if (noCallerSavedRegs)
      return ExtInfo(Bits | NoCallerSavedRegsMask);
    else
      return ExtInfo(Bits & ~NoCallerSavedRegsMask);
  }

  ExtInfo withNoCfCheck(bool noCfCheck) const {
    if (noCfCheck)
      return ExtInfo(Bits | NoCfCheckMask);
    else
      return ExtInfo(Bits & ~NoCfCheckMask);
  }

  ExtInfo withRegParm(unsigned RegParm) const {
    assert(RegParm < 7 && "Invalid regparm value")((RegParm < 7 && "Invalid regparm value") ? static_cast
<void> (0) : __assert_fail ("RegParm < 7 && \"Invalid regparm value\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 3623, __PRETTY_FUNCTION__));
    return ExtInfo((Bits & ~RegParmMask) |
                   ((RegParm + 1) << RegParmOffset));
  }

  ExtInfo withCallingConv(CallingConv cc) const {
    return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc);
  }

  void Profile(llvm::FoldingSetNodeID &ID) const {
    ID.AddInteger(Bits);
  }
};

/// A simple holder for a QualType representing a type in an
/// exception specification. Unfortunately needed by FunctionProtoType
/// because TrailingObjects cannot handle repeated types.
struct ExceptionType { QualType Type; };

/// A simple holder for various uncommon bits which do not fit in
/// FunctionTypeBitfields. Aligned to alignof(void *) to maintain the
/// alignment of subsequent objects in TrailingObjects. You must update
/// hasExtraBitfields in FunctionProtoType after adding extra data here.
struct alignas(void *) FunctionTypeExtraBitfields {
  /// The number of types in the exception specification.
  /// A whole unsigned is not needed here and according to
  /// [implimits] 8 bits would be enough here.
  unsigned NumExceptionType;
};

3653protected:
FunctionType(TypeClass tc, QualType res,
             QualType Canonical, bool Dependent,
             bool InstantiationDependent,
             bool VariablyModified, bool ContainsUnexpandedParameterPack,
             ExtInfo Info)
    : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified,
           ContainsUnexpandedParameterPack),
      ResultType(res) {
  FunctionTypeBits.ExtInfo = Info.Bits;
}

Qualifiers getFastTypeQuals() const {
  return Qualifiers::fromFastMask(FunctionTypeBits.FastTypeQuals);
}

3669public:
QualType getReturnType() const { return ResultType; }

bool getHasRegParm() const { return getExtInfo().getHasRegParm(); }
unsigned getRegParmType() const { return getExtInfo().getRegParm(); }

/// Determine whether this function type includes the GNU noreturn
/// attribute. The C++11 [[noreturn]] attribute does not affect the function
/// type.
bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); }

CallingConv getCallConv() const { return getExtInfo().getCC(); }
ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); }

static_assert((~Qualifiers::FastMask & Qualifiers::CVRMask) == 0,
              "Const, volatile and restrict are assumed to be a subset of "
              "the fast qualifiers.");

bool isConst() const { return getFastTypeQuals().hasConst(); }
bool isVolatile() const { return getFastTypeQuals().hasVolatile(); }
bool isRestrict() const { return getFastTypeQuals().hasRestrict(); }

/// Determine the type of an expression that calls a function of
/// this type.
QualType getCallResultType(const ASTContext &Context) const {
  return getReturnType().getNonLValueExprType(Context);
}

static StringRef getNameForCallConv(CallingConv CC);

static bool classof(const Type *T) {
  return T->getTypeClass() == FunctionNoProto ||
         T->getTypeClass() == FunctionProto;
}
3703};

3705/// Represents a K&R-style 'int foo()' function, which has
3706/// no information available about its arguments.
3707class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these.

FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info)
    : FunctionType(FunctionNoProto, Result, Canonical,
                   /*Dependent=*/false, /*InstantiationDependent=*/false,
                   Result->isVariablyModifiedType(),
                   /*ContainsUnexpandedParameterPack=*/false, Info) {}

3716public:
// No additional state past what FunctionType provides.

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getReturnType(), getExtInfo());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType,
                    ExtInfo Info) {
  Info.Profile(ID);
  ID.AddPointer(ResultType.getAsOpaquePtr());
}

static bool classof(const Type *T) {
  return T->getTypeClass() == FunctionNoProto;
}
3735};

3737/// Represents a prototype with parameter type info, e.g.
3738/// 'int foo(int)' or 'int foo(void)'.  'void' is represented as having no
3739/// parameters, not as having a single void parameter. Such a type can have
3740/// an exception specification, but this specification is not part of the
3741/// canonical type. FunctionProtoType has several trailing objects, some of
3742/// which optional. For more information about the trailing objects see
3743/// the first comment inside FunctionProtoType.
3744class FunctionProtoType final
  : public FunctionType,
    public llvm::FoldingSetNode,
    private llvm::TrailingObjects<
        FunctionProtoType, QualType, SourceLocation,
        FunctionType::FunctionTypeExtraBitfields, FunctionType::ExceptionType,
        Expr *, FunctionDecl *, FunctionType::ExtParameterInfo, Qualifiers> {
friend class ASTContext; // ASTContext creates these.
friend TrailingObjects;

// FunctionProtoType is followed by several trailing objects, some of
// which optional. They are in order:
//
// * An array of getNumParams() QualType holding the parameter types.
//   Always present. Note that for the vast majority of FunctionProtoType,
//   these will be the only trailing objects.
//
// * Optionally if the function is variadic, the SourceLocation of the
//   ellipsis.
//
// * Optionally if some extra data is stored in FunctionTypeExtraBitfields
//   (see FunctionTypeExtraBitfields and FunctionTypeBitfields):
//   a single FunctionTypeExtraBitfields. Present if and only if
//   hasExtraBitfields() is true.
//
// * Optionally exactly one of:
//   * an array of getNumExceptions() ExceptionType,
//   * a single Expr *,
//   * a pair of FunctionDecl *,
//   * a single FunctionDecl *
//   used to store information about the various types of exception
//   specification. See getExceptionSpecSize for the details.
//
// * Optionally an array of getNumParams() ExtParameterInfo holding
//   an ExtParameterInfo for each of the parameters. Present if and
//   only if hasExtParameterInfos() is true.
//
// * Optionally a Qualifiers object to represent extra qualifiers that can't
//   be represented by FunctionTypeBitfields.FastTypeQuals. Present if and only
//   if hasExtQualifiers() is true.
//
// The optional FunctionTypeExtraBitfields has to be before the data
// related to the exception specification since it contains the number
// of exception types.
//
// We put the ExtParameterInfos last.  If all were equal, it would make
// more sense to put these before the exception specification, because
// it's much easier to skip past them compared to the elaborate switch
// required to skip the exception specification.  However, all is not
// equal; ExtParameterInfos are used to model very uncommon features,
// and it's better not to burden the more common paths.

3796public:
/// Holds information about the various types of exception specification.
/// ExceptionSpecInfo is not stored as such in FunctionProtoType but is
/// used to group together the various bits of information about the
/// exception specification.
struct ExceptionSpecInfo {
  /// The kind of exception specification this is.
  ExceptionSpecificationType Type = EST_None;

  /// Explicitly-specified list of exception types.
  ArrayRef<QualType> Exceptions;

  /// Noexcept expression, if this is a computed noexcept specification.
  Expr *NoexceptExpr = nullptr;

  /// The function whose exception specification this is, for
  /// EST_Unevaluated and EST_Uninstantiated.
  FunctionDecl *SourceDecl = nullptr;

  /// The function template whose exception specification this is instantiated
  /// from, for EST_Uninstantiated.
  FunctionDecl *SourceTemplate = nullptr;

  ExceptionSpecInfo() = default;

  ExceptionSpecInfo(ExceptionSpecificationType EST) : Type(EST) {}
};

/// Extra information about a function prototype. ExtProtoInfo is not
/// stored as such in FunctionProtoType but is used to group together
/// the various bits of extra information about a function prototype.
struct ExtProtoInfo {
  FunctionType::ExtInfo ExtInfo;
  bool Variadic : 1;
  bool HasTrailingReturn : 1;
  Qualifiers TypeQuals;
  RefQualifierKind RefQualifier = RQ_None;
  ExceptionSpecInfo ExceptionSpec;
  const ExtParameterInfo *ExtParameterInfos = nullptr;
  SourceLocation EllipsisLoc;

  ExtProtoInfo() : Variadic(false), HasTrailingReturn(false) {}

  ExtProtoInfo(CallingConv CC)
      : ExtInfo(CC), Variadic(false), HasTrailingReturn(false) {}

  ExtProtoInfo withExceptionSpec(const ExceptionSpecInfo &ESI) {
    ExtProtoInfo Result(*this);
    Result.ExceptionSpec = ESI;
    return Result;
  }
};

3849private:
unsigned numTrailingObjects(OverloadToken<QualType>) const {
  return getNumParams();
}

unsigned numTrailingObjects(OverloadToken<SourceLocation>) const {
  return isVariadic();
}

unsigned numTrailingObjects(OverloadToken<FunctionTypeExtraBitfields>) const {
  return hasExtraBitfields();
}

unsigned numTrailingObjects(OverloadToken<ExceptionType>) const {
  return getExceptionSpecSize().NumExceptionType;
}

unsigned numTrailingObjects(OverloadToken<Expr *>) const {
  return getExceptionSpecSize().NumExprPtr;
}

unsigned numTrailingObjects(OverloadToken<FunctionDecl *>) const {
  return getExceptionSpecSize().NumFunctionDeclPtr;
}

unsigned numTrailingObjects(OverloadToken<ExtParameterInfo>) const {
  return hasExtParameterInfos() ? getNumParams() : 0;
}

/// Determine whether there are any argument types that
/// contain an unexpanded parameter pack.
static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray,
                                               unsigned numArgs) {
  for (unsigned Idx = 0; Idx < numArgs; ++Idx)
    if (ArgArray[Idx]->containsUnexpandedParameterPack())
      return true;

  return false;
}

FunctionProtoType(QualType result, ArrayRef<QualType> params,
                  QualType canonical, const ExtProtoInfo &epi);

/// This struct is returned by getExceptionSpecSize and is used to
/// translate an ExceptionSpecificationType to the number and kind
/// of trailing objects related to the exception specification.
struct ExceptionSpecSizeHolder {
  unsigned NumExceptionType;
  unsigned NumExprPtr;
  unsigned NumFunctionDeclPtr;
};

/// Return the number and kind of trailing objects
/// related to the exception specification.
static ExceptionSpecSizeHolder
getExceptionSpecSize(ExceptionSpecificationType EST, unsigned NumExceptions) {
  switch (EST) {
  case EST_None:
  case EST_DynamicNone:
  case EST_MSAny:
  case EST_BasicNoexcept:
  case EST_Unparsed:
  case EST_NoThrow:
    return {0, 0, 0};

  case EST_Dynamic:
    return {NumExceptions, 0, 0};

  case EST_DependentNoexcept:
  case EST_NoexceptFalse:
  case EST_NoexceptTrue:
    return {0, 1, 0};

  case EST_Uninstantiated:
    return {0, 0, 2};

  case EST_Unevaluated:
    return {0, 0, 1};
  }
  llvm_unreachable("bad exception specification kind")::llvm::llvm_unreachable_internal("bad exception specification kind"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 3928);
}

/// Return the number and kind of trailing objects
/// related to the exception specification.
ExceptionSpecSizeHolder getExceptionSpecSize() const {
  return getExceptionSpecSize(getExceptionSpecType(), getNumExceptions());
}

/// Whether the trailing FunctionTypeExtraBitfields is present.
static bool hasExtraBitfields(ExceptionSpecificationType EST) {
  // If the exception spec type is EST_Dynamic then we have > 0 exception
  // types and the exact number is stored in FunctionTypeExtraBitfields.
  return EST == EST_Dynamic;
}

/// Whether the trailing FunctionTypeExtraBitfields is present.
bool hasExtraBitfields() const {
  return hasExtraBitfields(getExceptionSpecType());
}

bool hasExtQualifiers() const {
  return FunctionTypeBits.HasExtQuals;
}

3953public:
unsigned getNumParams() const { return FunctionTypeBits.NumParams; }

QualType getParamType(unsigned i) const {
  assert(i < getNumParams() && "invalid parameter index")((i < getNumParams() && "invalid parameter index")
 ? static_cast<void> (0) : __assert_fail ("i < getNumParams() && \"invalid parameter index\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 3957, __PRETTY_FUNCTION__));
  return param_type_begin()[i];
}

ArrayRef<QualType> getParamTypes() const {
  return llvm::makeArrayRef(param_type_begin(), param_type_end());
}

ExtProtoInfo getExtProtoInfo() const {
  ExtProtoInfo EPI;
  EPI.ExtInfo = getExtInfo();
  EPI.Variadic = isVariadic();
  EPI.EllipsisLoc = getEllipsisLoc();
  EPI.HasTrailingReturn = hasTrailingReturn();
  EPI.ExceptionSpec = getExceptionSpecInfo();
  EPI.TypeQuals = getMethodQuals();
  EPI.RefQualifier = getRefQualifier();
  EPI.ExtParameterInfos = getExtParameterInfosOrNull();
  return EPI;
}

/// Get the kind of exception specification on this function.
ExceptionSpecificationType getExceptionSpecType() const {
  return static_cast<ExceptionSpecificationType>(
      FunctionTypeBits.ExceptionSpecType);
}

/// Return whether this function has any kind of exception spec.
bool hasExceptionSpec() const { return getExceptionSpecType() != EST_None; }

/// Return whether this function has a dynamic (throw) exception spec.
bool hasDynamicExceptionSpec() const {
  return isDynamicExceptionSpec(getExceptionSpecType());
}

/// Return whether this function has a noexcept exception spec.
bool hasNoexceptExceptionSpec() const {
  return isNoexceptExceptionSpec(getExceptionSpecType());
}

/// Return whether this function has a dependent exception spec.
bool hasDependentExceptionSpec() const;

/// Return whether this function has an instantiation-dependent exception
/// spec.
bool hasInstantiationDependentExceptionSpec() const;

/// Return all the available information about this type's exception spec.
ExceptionSpecInfo getExceptionSpecInfo() const {
  ExceptionSpecInfo Result;
  Result.Type = getExceptionSpecType();
  if (Result.Type == EST_Dynamic) {
    Result.Exceptions = exceptions();
  } else if (isComputedNoexcept(Result.Type)) {
    Result.NoexceptExpr = getNoexceptExpr();
  } else if (Result.Type == EST_Uninstantiated) {
    Result.SourceDecl = getExceptionSpecDecl();
    Result.SourceTemplate = getExceptionSpecTemplate();
  } else if (Result.Type == EST_Unevaluated) {
    Result.SourceDecl = getExceptionSpecDecl();
  }
  return Result;
}

/// Return the number of types in the exception specification.
unsigned getNumExceptions() const {
  return getExceptionSpecType() == EST_Dynamic
             ? getTrailingObjects<FunctionTypeExtraBitfields>()
                   ->NumExceptionType
             : 0;
}

/// Return the ith exception type, where 0 <= i < getNumExceptions().
QualType getExceptionType(unsigned i) const {
  assert(i < getNumExceptions() && "Invalid exception number!")((i < getNumExceptions() && "Invalid exception number!"
) ? static_cast<void> (0) : __assert_fail ("i < getNumExceptions() && \"Invalid exception number!\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 4031, __PRETTY_FUNCTION__));
  return exception_begin()[i];
}

/// Return the expression inside noexcept(expression), or a null pointer
/// if there is none (because the exception spec is not of this form).
Expr *getNoexceptExpr() const {
  if (!isComputedNoexcept(getExceptionSpecType()))
    return nullptr;
  return *getTrailingObjects<Expr *>();
}

/// If this function type has an exception specification which hasn't
/// been determined yet (either because it has not been evaluated or because
/// it has not been instantiated), this is the function whose exception
/// specification is represented by this type.
FunctionDecl *getExceptionSpecDecl() const {
  if (getExceptionSpecType() != EST_Uninstantiated &&
      getExceptionSpecType() != EST_Unevaluated)
    return nullptr;
  return getTrailingObjects<FunctionDecl *>()[0];
}

/// If this function type has an uninstantiated exception
/// specification, this is the function whose exception specification
/// should be instantiated to find the exception specification for
/// this type.
FunctionDecl *getExceptionSpecTemplate() const {
  if (getExceptionSpecType() != EST_Uninstantiated)
    return nullptr;
  return getTrailingObjects<FunctionDecl *>()[1];
}

/// Determine whether this function type has a non-throwing exception
/// specification.
CanThrowResult canThrow() const;

/// Determine whether this function type has a non-throwing exception
/// specification. If this depends on template arguments, returns
/// \c ResultIfDependent.
bool isNothrow(bool ResultIfDependent = false) const {
  return ResultIfDependent ? canThrow() != CT_Can : canThrow() == CT_Cannot;
}

/// Whether this function prototype is variadic.
bool isVariadic() const { return FunctionTypeBits.Variadic; }

SourceLocation getEllipsisLoc() const {
  return isVariadic() ? *getTrailingObjects<SourceLocation>()
                      : SourceLocation();
}

/// Determines whether this function prototype contains a
/// parameter pack at the end.
///
/// A function template whose last parameter is a parameter pack can be
/// called with an arbitrary number of arguments, much like a variadic
/// function.
bool isTemplateVariadic() const;

/// Whether this function prototype has a trailing return type.
bool hasTrailingReturn() const { return FunctionTypeBits.HasTrailingReturn; }

Qualifiers getMethodQuals() const {
  if (hasExtQualifiers())
    return *getTrailingObjects<Qualifiers>();
  else
    return getFastTypeQuals();
}

/// Retrieve the ref-qualifier associated with this function type.
RefQualifierKind getRefQualifier() const {
  return static_cast<RefQualifierKind>(FunctionTypeBits.RefQualifier);
}

using param_type_iterator = const QualType *;
using param_type_range = llvm::iterator_range<param_type_iterator>;

param_type_range param_types() const {
  return param_type_range(param_type_begin(), param_type_end());
}

param_type_iterator param_type_begin() const {
  return getTrailingObjects<QualType>();
}

param_type_iterator param_type_end() const {
  return param_type_begin() + getNumParams();
}

using exception_iterator = const QualType *;

ArrayRef<QualType> exceptions() const {
  return llvm::makeArrayRef(exception_begin(), exception_end());
}

exception_iterator exception_begin() const {
  return reinterpret_cast<exception_iterator>(
      getTrailingObjects<ExceptionType>());
}

exception_iterator exception_end() const {
  return exception_begin() + getNumExceptions();
}

/// Is there any interesting extra information for any of the parameters
/// of this function type?
bool hasExtParameterInfos() const {
  return FunctionTypeBits.HasExtParameterInfos;
}

ArrayRef<ExtParameterInfo> getExtParameterInfos() const {
  assert(hasExtParameterInfos())((hasExtParameterInfos()) ? static_cast<void> (0) : __assert_fail
 ("hasExtParameterInfos()", "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 4143, __PRETTY_FUNCTION__));
  return ArrayRef<ExtParameterInfo>(getTrailingObjects<ExtParameterInfo>(),
                                    getNumParams());
}

/// Return a pointer to the beginning of the array of extra parameter
/// information, if present, or else null if none of the parameters
/// carry it.  This is equivalent to getExtProtoInfo().ExtParameterInfos.
const ExtParameterInfo *getExtParameterInfosOrNull() const {
  if (!hasExtParameterInfos())
    return nullptr;
  return getTrailingObjects<ExtParameterInfo>();
}

ExtParameterInfo getExtParameterInfo(unsigned I) const {
  assert(I < getNumParams() && "parameter index out of range")((I < getNumParams() && "parameter index out of range"
) ? static_cast<void> (0) : __assert_fail ("I < getNumParams() && \"parameter index out of range\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 4158, __PRETTY_FUNCTION__));
  if (hasExtParameterInfos())
    return getTrailingObjects<ExtParameterInfo>()[I];
  return ExtParameterInfo();
}

ParameterABI getParameterABI(unsigned I) const {
  assert(I < getNumParams() && "parameter index out of range")((I < getNumParams() && "parameter index out of range"
) ? static_cast<void> (0) : __assert_fail ("I < getNumParams() && \"parameter index out of range\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 4165, __PRETTY_FUNCTION__));
  if (hasExtParameterInfos())
    return getTrailingObjects<ExtParameterInfo>()[I].getABI();
  return ParameterABI::Ordinary;
}

bool isParamConsumed(unsigned I) const {
  assert(I < getNumParams() && "parameter index out of range")((I < getNumParams() && "parameter index out of range"
) ? static_cast<void> (0) : __assert_fail ("I < getNumParams() && \"parameter index out of range\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 4172, __PRETTY_FUNCTION__));
  if (hasExtParameterInfos())
    return getTrailingObjects<ExtParameterInfo>()[I].isConsumed();
  return false;
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void printExceptionSpecification(raw_ostream &OS,
                                 const PrintingPolicy &Policy) const;

static bool classof(const Type *T) {
  return T->getTypeClass() == FunctionProto;
}

void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx);
static void Profile(llvm::FoldingSetNodeID &ID, QualType Result,
                    param_type_iterator ArgTys, unsigned NumArgs,
                    const ExtProtoInfo &EPI, const ASTContext &Context,
                    bool Canonical);
4193};

4195/// Represents the dependent type named by a dependently-scoped
4196/// typename using declaration, e.g.
4197///   using typename Base<T>::foo;
4198///
4199/// Template instantiation turns these into the underlying type.
4200class UnresolvedUsingType : public Type {
friend class ASTContext; // ASTContext creates these.

UnresolvedUsingTypenameDecl *Decl;

UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D)
    : Type(UnresolvedUsing, QualType(), true, true, false,
           /*ContainsUnexpandedParameterPack=*/false),
      Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {}

4210public:
UnresolvedUsingTypenameDecl *getDecl() const { return Decl; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == UnresolvedUsing;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  return Profile(ID, Decl);
}

static void Profile(llvm::FoldingSetNodeID &ID,
                    UnresolvedUsingTypenameDecl *D) {
  ID.AddPointer(D);
}
4228};

4230class TypedefType : public Type {
TypedefNameDecl *Decl;

4233protected:
friend class ASTContext; // ASTContext creates these.

TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can)
    : Type(tc, can, can->isDependentType(),
           can->isInstantiationDependentType(),
           can->isVariablyModifiedType(),
           /*ContainsUnexpandedParameterPack=*/false),
      Decl(const_cast<TypedefNameDecl*>(D)) {
  assert(!isa<TypedefType>(can) && "Invalid canonical type")((!isa<TypedefType>(can) && "Invalid canonical type"
) ? static_cast<void> (0) : __assert_fail ("!isa<TypedefType>(can) && \"Invalid canonical type\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 4242, __PRETTY_FUNCTION__));
}

4245public:
TypedefNameDecl *getDecl() const { return Decl; }

bool isSugared() const { return true; }
QualType desugar() const;

static bool classof(const Type *T) { return T->getTypeClass() == Typedef; }
4252};

4254/// Sugar type that represents a type that was qualified by a qualifier written
4255/// as a macro invocation.
4256class MacroQualifiedType : public Type {
friend class ASTContext; // ASTContext creates these.

QualType UnderlyingTy;
const IdentifierInfo *MacroII;

MacroQualifiedType(QualType UnderlyingTy, QualType CanonTy,
                   const IdentifierInfo *MacroII)
    : Type(MacroQualified, CanonTy, UnderlyingTy->isDependentType(),
           UnderlyingTy->isInstantiationDependentType(),
           UnderlyingTy->isVariablyModifiedType(),
           UnderlyingTy->containsUnexpandedParameterPack()),
      UnderlyingTy(UnderlyingTy), MacroII(MacroII) {
  assert(isa<AttributedType>(UnderlyingTy) &&((isa<AttributedType>(UnderlyingTy) && "Expected a macro qualified type to only wrap attributed types."
) ? static_cast<void> (0) : __assert_fail ("isa<AttributedType>(UnderlyingTy) && \"Expected a macro qualified type to only wrap attributed types.\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 4270, __PRETTY_FUNCTION__))
         "Expected a macro qualified type to only wrap attributed types.")((isa<AttributedType>(UnderlyingTy) && "Expected a macro qualified type to only wrap attributed types."
) ? static_cast<void> (0) : __assert_fail ("isa<AttributedType>(UnderlyingTy) && \"Expected a macro qualified type to only wrap attributed types.\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 4270, __PRETTY_FUNCTION__));
}

4273public:
const IdentifierInfo *getMacroIdentifier() const { return MacroII; }
QualType getUnderlyingType() const { return UnderlyingTy; }

/// Return this attributed type's modified type with no qualifiers attached to
/// it.
QualType getModifiedType() const;

bool isSugared() const { return true; }
QualType desugar() const;

static bool classof(const Type *T) {
  return T->getTypeClass() == MacroQualified;
}
4287};

4289/// Represents a `typeof` (or __typeof__) expression (a GCC extension).
4290class TypeOfExprType : public Type {
Expr *TOExpr;

4293protected:
friend class ASTContext; // ASTContext creates these.

TypeOfExprType(Expr *E, QualType can = QualType());

4298public:
Expr *getUnderlyingExpr() const { return TOExpr; }

/// Remove a single level of sugar.
QualType desugar() const;

/// Returns whether this type directly provides sugar.
bool isSugared() const;

static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; }
4308};

4310/// Internal representation of canonical, dependent
4311/// `typeof(expr)` types.
4312///
4313/// This class is used internally by the ASTContext to manage
4314/// canonical, dependent types, only. Clients will only see instances
4315/// of this class via TypeOfExprType nodes.
4316class DependentTypeOfExprType
: public TypeOfExprType, public llvm::FoldingSetNode {
const ASTContext &Context;

4320public:
DependentTypeOfExprType(const ASTContext &Context, Expr *E)
    : TypeOfExprType(E), Context(Context) {}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, Context, getUnderlyingExpr());
}

static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
                    Expr *E);
4330};

4332/// Represents `typeof(type)`, a GCC extension.
4333class TypeOfType : public Type {
friend class ASTContext; // ASTContext creates these.

QualType TOType;

TypeOfType(QualType T, QualType can)
    : Type(TypeOf, can, T->isDependentType(),
           T->isInstantiationDependentType(),
           T->isVariablyModifiedType(),
           T->containsUnexpandedParameterPack()),
      TOType(T) {
  assert(!isa<TypedefType>(can) && "Invalid canonical type")((!isa<TypedefType>(can) && "Invalid canonical type"
) ? static_cast<void> (0) : __assert_fail ("!isa<TypedefType>(can) && \"Invalid canonical type\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 4344, __PRETTY_FUNCTION__));
}

4347public:
QualType getUnderlyingType() const { return TOType; }

/// Remove a single level of sugar.
QualType desugar() const { return getUnderlyingType(); }

/// Returns whether this type directly provides sugar.
bool isSugared() const { return true; }

static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; }
4357};

4359/// Represents the type `decltype(expr)` (C++11).
4360class DecltypeType : public Type {
Expr *E;
QualType UnderlyingType;

4364protected:
friend class ASTContext; // ASTContext creates these.

DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType());

4369public:
Expr *getUnderlyingExpr() const { return E; }
QualType getUnderlyingType() const { return UnderlyingType; }

/// Remove a single level of sugar.
QualType desugar() const;

/// Returns whether this type directly provides sugar.
bool isSugared() const;

static bool classof(const Type *T) { return T->getTypeClass() == Decltype; }
4380};

4382/// Internal representation of canonical, dependent
4383/// decltype(expr) types.
4384///
4385/// This class is used internally by the ASTContext to manage
4386/// canonical, dependent types, only. Clients will only see instances
4387/// of this class via DecltypeType nodes.
4388class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode {
const ASTContext &Context;

4391public:
DependentDecltypeType(const ASTContext &Context, Expr *E);

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, Context, getUnderlyingExpr());
}

static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
                    Expr *E);
4400};

4402/// A unary type transform, which is a type constructed from another.
4403class UnaryTransformType : public Type {
4404public:
enum UTTKind {
  EnumUnderlyingType
};

4409private:
/// The untransformed type.
QualType BaseType;

/// The transformed type if not dependent, otherwise the same as BaseType.
QualType UnderlyingType;

UTTKind UKind;

4418protected:
friend class ASTContext;

UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind,
                   QualType CanonicalTy);

4424public:
bool isSugared() const { return !isDependentType(); }
QualType desugar() const { return UnderlyingType; }

QualType getUnderlyingType() const { return UnderlyingType; }
QualType getBaseType() const { return BaseType; }

UTTKind getUTTKind() const { return UKind; }

static bool classof(const Type *T) {
  return T->getTypeClass() == UnaryTransform;
}
4436};

4438/// Internal representation of canonical, dependent
4439/// __underlying_type(type) types.
4440///
4441/// This class is used internally by the ASTContext to manage
4442/// canonical, dependent types, only. Clients will only see instances
4443/// of this class via UnaryTransformType nodes.
4444class DependentUnaryTransformType : public UnaryTransformType,
                                  public llvm::FoldingSetNode {
4446public:
DependentUnaryTransformType(const ASTContext &C, QualType BaseType,
                            UTTKind UKind);

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getBaseType(), getUTTKind());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType BaseType,
                    UTTKind UKind) {
  ID.AddPointer(BaseType.getAsOpaquePtr());
  ID.AddInteger((unsigned)UKind);
}
4459};

4461class TagType : public Type {
friend class ASTReader;
template <class T> friend class serialization::AbstractTypeReader;

/// Stores the TagDecl associated with this type. The decl may point to any
/// TagDecl that declares the entity.
TagDecl *decl;

4469protected:
TagType(TypeClass TC, const TagDecl *D, QualType can);

4472public:
TagDecl *getDecl() const;

/// Determines whether this type is in the process of being defined.
bool isBeingDefined() const;

static bool classof(const Type *T) {
  return T->getTypeClass() == Enum || T->getTypeClass() == Record;
}
4481};

4483/// A helper class that allows the use of isa/cast/dyncast
4484/// to detect TagType objects of structs/unions/classes.
4485class RecordType : public TagType {
4486protected:
friend class ASTContext; // ASTContext creates these.

explicit RecordType(const RecordDecl *D)
    : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) {}
explicit RecordType(TypeClass TC, RecordDecl *D)
    : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) {}

4494public:
RecordDecl *getDecl() const {
  return reinterpret_cast<RecordDecl*>(TagType::getDecl());
}

/// Recursively check all fields in the record for const-ness. If any field
/// is declared const, return true. Otherwise, return false.
bool hasConstFields() const;

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) { return T->getTypeClass() == Record; }
4507};

4509/// A helper class that allows the use of isa/cast/dyncast
4510/// to detect TagType objects of enums.
4511class EnumType : public TagType {
friend class ASTContext; // ASTContext creates these.

explicit EnumType(const EnumDecl *D)
    : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) {}

4517public:
EnumDecl *getDecl() const {
  return reinterpret_cast<EnumDecl*>(TagType::getDecl());
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) { return T->getTypeClass() == Enum; }
4526};

4528/// An attributed type is a type to which a type attribute has been applied.
4529///
4530/// The "modified type" is the fully-sugared type to which the attributed
4531/// type was applied; generally it is not canonically equivalent to the
4532/// attributed type. The "equivalent type" is the minimally-desugared type
4533/// which the type is canonically equivalent to.
4534///
4535/// For example, in the following attributed type:
4536///     int32_t __attribute__((vector_size(16)))
4537///   - the modified type is the TypedefType for int32_t
4538///   - the equivalent type is VectorType(16, int32_t)
4539///   - the canonical type is VectorType(16, int)
4540class AttributedType : public Type, public llvm::FoldingSetNode {
4541public:
using Kind = attr::Kind;

4544private:
friend class ASTContext; // ASTContext creates these

QualType ModifiedType;
QualType EquivalentType;

AttributedType(QualType canon, attr::Kind attrKind, QualType modified,
               QualType equivalent)
    : Type(Attributed, canon, equivalent->isDependentType(),
           equivalent->isInstantiationDependentType(),
           equivalent->isVariablyModifiedType(),
           equivalent->containsUnexpandedParameterPack()),
      ModifiedType(modified), EquivalentType(equivalent) {
  AttributedTypeBits.AttrKind = attrKind;
}

4560public:
Kind getAttrKind() const {
  return static_cast<Kind>(AttributedTypeBits.AttrKind);
}

QualType getModifiedType() const { return ModifiedType; }
QualType getEquivalentType() const { return EquivalentType; }

bool isSugared() const { return true; }
QualType desugar() const { return getEquivalentType(); }

/// Does this attribute behave like a type qualifier?
///
/// A type qualifier adjusts a type to provide specialized rules for
/// a specific object, like the standard const and volatile qualifiers.
/// This includes attributes controlling things like nullability,
/// address spaces, and ARC ownership.  The value of the object is still
/// largely described by the modified type.
///
/// In contrast, many type attributes "rewrite" their modified type to
/// produce a fundamentally different type, not necessarily related in any
/// formalizable way to the original type.  For example, calling convention
/// and vector attributes are not simple type qualifiers.
///
/// Type qualifiers are often, but not always, reflected in the canonical
/// type.
bool isQualifier() const;

bool isMSTypeSpec() const;

bool isCallingConv() const;

llvm::Optional<NullabilityKind> getImmediateNullability() const;

/// Retrieve the attribute kind corresponding to the given
/// nullability kind.
static Kind getNullabilityAttrKind(NullabilityKind kind) {
  switch (kind) {
  case NullabilityKind::NonNull:
    return attr::TypeNonNull;

  case NullabilityKind::Nullable:
    return attr::TypeNullable;

  case NullabilityKind::Unspecified:
    return attr::TypeNullUnspecified;
  }
  llvm_unreachable("Unknown nullability kind.")::llvm::llvm_unreachable_internal("Unknown nullability kind."
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 4607);
}

/// Strip off the top-level nullability annotation on the given
/// type, if it's there.
///
/// \param T The type to strip. If the type is exactly an
/// AttributedType specifying nullability (without looking through
/// type sugar), the nullability is returned and this type changed
/// to the underlying modified type.
///
/// \returns the top-level nullability, if present.
static Optional<NullabilityKind> stripOuterNullability(QualType &T);

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getAttrKind(), ModifiedType, EquivalentType);
}

static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind,
                    QualType modified, QualType equivalent) {
  ID.AddInteger(attrKind);
  ID.AddPointer(modified.getAsOpaquePtr());
  ID.AddPointer(equivalent.getAsOpaquePtr());
}

static bool classof(const Type *T) {
  return T->getTypeClass() == Attributed;
}
4635};

4637class TemplateTypeParmType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these

// Helper data collector for canonical types.
struct CanonicalTTPTInfo {
  unsigned Depth : 15;
  unsigned ParameterPack : 1;
  unsigned Index : 16;
};

union {
  // Info for the canonical type.
  CanonicalTTPTInfo CanTTPTInfo;

  // Info for the non-canonical type.
  TemplateTypeParmDecl *TTPDecl;
};

/// Build a non-canonical type.
TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon)
    : Type(TemplateTypeParm, Canon, /*Dependent=*/true,
           /*InstantiationDependent=*/true,
           /*VariablyModified=*/false,
           Canon->containsUnexpandedParameterPack()),
      TTPDecl(TTPDecl) {}

/// Build the canonical type.
TemplateTypeParmType(unsigned D, unsigned I, bool PP)
    : Type(TemplateTypeParm, QualType(this, 0),
           /*Dependent=*/true,
           /*InstantiationDependent=*/true,
           /*VariablyModified=*/false, PP) {
  CanTTPTInfo.Depth = D;
  CanTTPTInfo.Index = I;
  CanTTPTInfo.ParameterPack = PP;
}

const CanonicalTTPTInfo& getCanTTPTInfo() const {
  QualType Can = getCanonicalTypeInternal();
  return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo;
}

4679public:
unsigned getDepth() const { return getCanTTPTInfo().Depth; }
unsigned getIndex() const { return getCanTTPTInfo().Index; }
bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; }

TemplateTypeParmDecl *getDecl() const {
  return isCanonicalUnqualified() ? nullptr : TTPDecl;
}

IdentifierInfo *getIdentifier() const;

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl());
}

static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth,
                    unsigned Index, bool ParameterPack,
                    TemplateTypeParmDecl *TTPDecl) {
  ID.AddInteger(Depth);
  ID.AddInteger(Index);
  ID.AddBoolean(ParameterPack);
  ID.AddPointer(TTPDecl);
}

static bool classof(const Type *T) {
  return T->getTypeClass() == TemplateTypeParm;
}
4709};

4711/// Represents the result of substituting a type for a template
4712/// type parameter.
4713///
4714/// Within an instantiated template, all template type parameters have
4715/// been replaced with these.  They are used solely to record that a
4716/// type was originally written as a template type parameter;
4717/// therefore they are never canonical.
4718class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode {
friend class ASTContext;

// The original type parameter.
const TemplateTypeParmType *Replaced;

SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon)
    : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(),
           Canon->isInstantiationDependentType(),
           Canon->isVariablyModifiedType(),
           Canon->containsUnexpandedParameterPack()),
      Replaced(Param) {}

4731public:
/// Gets the template parameter that was substituted for.
const TemplateTypeParmType *getReplacedParameter() const {
  return Replaced;
}

/// Gets the type that was substituted for the template
/// parameter.
QualType getReplacementType() const {
  return getCanonicalTypeInternal();
}

bool isSugared() const { return true; }
QualType desugar() const { return getReplacementType(); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getReplacedParameter(), getReplacementType());
}

static void Profile(llvm::FoldingSetNodeID &ID,
                    const TemplateTypeParmType *Replaced,
                    QualType Replacement) {
  ID.AddPointer(Replaced);
  ID.AddPointer(Replacement.getAsOpaquePtr());
}

static bool classof(const Type *T) {
  return T->getTypeClass() == SubstTemplateTypeParm;
}
4760};

4762/// Represents the result of substituting a set of types for a template
4763/// type parameter pack.
4764///
4765/// When a pack expansion in the source code contains multiple parameter packs
4766/// and those parameter packs correspond to different levels of template
4767/// parameter lists, this type node is used to represent a template type
4768/// parameter pack from an outer level, which has already had its argument pack
4769/// substituted but that still lives within a pack expansion that itself
4770/// could not be instantiated. When actually performing a substitution into
4771/// that pack expansion (e.g., when all template parameters have corresponding
4772/// arguments), this type will be replaced with the \c SubstTemplateTypeParmType
4773/// at the current pack substitution index.
4774class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode {
friend class ASTContext;

/// The original type parameter.
const TemplateTypeParmType *Replaced;

/// A pointer to the set of template arguments that this
/// parameter pack is instantiated with.
const TemplateArgument *Arguments;

SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param,
                              QualType Canon,
                              const TemplateArgument &ArgPack);

4788public:
IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); }

/// Gets the template parameter that was substituted for.
const TemplateTypeParmType *getReplacedParameter() const {
  return Replaced;
}

unsigned getNumArgs() const {
  return SubstTemplateTypeParmPackTypeBits.NumArgs;
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

TemplateArgument getArgumentPack() const;

void Profile(llvm::FoldingSetNodeID &ID);
static void Profile(llvm::FoldingSetNodeID &ID,
                    const TemplateTypeParmType *Replaced,
                    const TemplateArgument &ArgPack);

static bool classof(const Type *T) {
  return T->getTypeClass() == SubstTemplateTypeParmPack;
}
4813};

4815/// Common base class for placeholders for types that get replaced by
4816/// placeholder type deduction: C++11 auto, C++14 decltype(auto), C++17 deduced
4817/// class template types, and (eventually) constrained type names from the C++
4818/// Concepts TS.
4819///
4820/// These types are usually a placeholder for a deduced type. However, before
4821/// the initializer is attached, or (usually) if the initializer is
4822/// type-dependent, there is no deduced type and the type is canonical. In
4823/// the latter case, it is also a dependent type.
4824class DeducedType : public Type {
4825protected:
DeducedType(TypeClass TC, QualType DeducedAsType, bool IsDependent,
            bool IsInstantiationDependent, bool ContainsParameterPack)
    : Type(TC,
           // FIXME: Retain the sugared deduced type?
           DeducedAsType.isNull() ? QualType(this, 0)
                                  : DeducedAsType.getCanonicalType(),
           IsDependent, IsInstantiationDependent,
           /*VariablyModified=*/false, ContainsParameterPack) {
  if (!DeducedAsType.isNull()) {
    if (DeducedAsType->isDependentType())
      setDependent();
    if (DeducedAsType->isInstantiationDependentType())
      setInstantiationDependent();
    if (DeducedAsType->containsUnexpandedParameterPack())
      setContainsUnexpandedParameterPack();
  }
}

4844public:
bool isSugared() const { return !isCanonicalUnqualified(); }
QualType desugar() const { return getCanonicalTypeInternal(); }

/// Get the type deduced for this placeholder type, or null if it's
/// either not been deduced or was deduced to a dependent type.
QualType getDeducedType() const {
  return !isCanonicalUnqualified() ? getCanonicalTypeInternal() : QualType();
}
bool isDeduced() const {
  return !isCanonicalUnqualified() || isDependentType();
}

static bool classof(const Type *T) {
  return T->getTypeClass() == Auto ||
         T->getTypeClass() == DeducedTemplateSpecialization;
}
4861};

4863/// Represents a C++11 auto or C++14 decltype(auto) type.
4864class AutoType : public DeducedType, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these

AutoType(QualType DeducedAsType, AutoTypeKeyword Keyword,
         bool IsDeducedAsDependent, bool IsDeducedAsPack)
    : DeducedType(Auto, DeducedAsType, IsDeducedAsDependent,
                  IsDeducedAsDependent, IsDeducedAsPack) {
  AutoTypeBits.Keyword = (unsigned)Keyword;
}

4874public:
bool isDecltypeAuto() const {
  return getKeyword() == AutoTypeKeyword::DecltypeAuto;
}

AutoTypeKeyword getKeyword() const {
  return (AutoTypeKeyword)AutoTypeBits.Keyword;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getDeducedType(), getKeyword(), isDependentType(),
          containsUnexpandedParameterPack());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType Deduced,
                    AutoTypeKeyword Keyword, bool IsDependent, bool IsPack) {
  ID.AddPointer(Deduced.getAsOpaquePtr());
  ID.AddInteger((unsigned)Keyword);
  ID.AddBoolean(IsDependent);
  ID.AddBoolean(IsPack);
}

static bool classof(const Type *T) {
  return T->getTypeClass() == Auto;
}
4899};

4901/// Represents a C++17 deduced template specialization type.
4902class DeducedTemplateSpecializationType : public DeducedType,
                                        public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these

/// The name of the template whose arguments will be deduced.
TemplateName Template;

DeducedTemplateSpecializationType(TemplateName Template,
                                  QualType DeducedAsType,
                                  bool IsDeducedAsDependent)
    : DeducedType(DeducedTemplateSpecialization, DeducedAsType,
                  IsDeducedAsDependent || Template.isDependent(),
                  IsDeducedAsDependent || Template.isInstantiationDependent(),
                  Template.containsUnexpandedParameterPack()),
      Template(Template) {}

4918public:
/// Retrieve the name of the template that we are deducing.
TemplateName getTemplateName() const { return Template;}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getTemplateName(), getDeducedType(), isDependentType());
}

static void Profile(llvm::FoldingSetNodeID &ID, TemplateName Template,
                    QualType Deduced, bool IsDependent) {
  Template.Profile(ID);
  ID.AddPointer(Deduced.getAsOpaquePtr());
  ID.AddBoolean(IsDependent);
}

static bool classof(const Type *T) {
  return T->getTypeClass() == DeducedTemplateSpecialization;
}
4936};

4938/// Represents a type template specialization; the template
4939/// must be a class template, a type alias template, or a template
4940/// template parameter.  A template which cannot be resolved to one of
4941/// these, e.g. because it is written with a dependent scope
4942/// specifier, is instead represented as a
4943/// @c DependentTemplateSpecializationType.
4944///
4945/// A non-dependent template specialization type is always "sugar",
4946/// typically for a \c RecordType.  For example, a class template
4947/// specialization type of \c vector<int> will refer to a tag type for
4948/// the instantiation \c std::vector<int, std::allocator<int>>
4949///
4950/// Template specializations are dependent if either the template or
4951/// any of the template arguments are dependent, in which case the
4952/// type may also be canonical.
4953///
4954/// Instances of this type are allocated with a trailing array of
4955/// TemplateArguments, followed by a QualType representing the
4956/// non-canonical aliased type when the template is a type alias
4957/// template.
4958class alignas(8) TemplateSpecializationType
  : public Type,
    public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these

/// The name of the template being specialized.  This is
/// either a TemplateName::Template (in which case it is a
/// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a
/// TypeAliasTemplateDecl*), a
/// TemplateName::SubstTemplateTemplateParmPack, or a
/// TemplateName::SubstTemplateTemplateParm (in which case the
/// replacement must, recursively, be one of these).
TemplateName Template;

TemplateSpecializationType(TemplateName T,
                           ArrayRef<TemplateArgument> Args,
                           QualType Canon,
                           QualType Aliased);

4977public:
/// Determine whether any of the given template arguments are dependent.
static bool anyDependentTemplateArguments(ArrayRef<TemplateArgumentLoc> Args,
                                          bool &InstantiationDependent);

static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &,
                                          bool &InstantiationDependent);

/// True if this template specialization type matches a current
/// instantiation in the context in which it is found.
bool isCurrentInstantiation() const {
  return isa<InjectedClassNameType>(getCanonicalTypeInternal());
}

/// Determine if this template specialization type is for a type alias
/// template that has been substituted.
///
/// Nearly every template specialization type whose template is an alias
/// template will be substituted. However, this is not the case when
/// the specialization contains a pack expansion but the template alias
/// does not have a corresponding parameter pack, e.g.,
///
/// \code
/// template<typename T, typename U, typename V> struct S;
/// template<typename T, typename U> using A = S<T, int, U>;
/// template<typename... Ts> struct X {
///   typedef A<Ts...> type; // not a type alias
/// };
/// \endcode
bool isTypeAlias() const { return TemplateSpecializationTypeBits.TypeAlias; }

/// Get the aliased type, if this is a specialization of a type alias
/// template.
QualType getAliasedType() const {
  assert(isTypeAlias() && "not a type alias template specialization")((isTypeAlias() && "not a type alias template specialization"
) ? static_cast<void> (0) : __assert_fail ("isTypeAlias() && \"not a type alias template specialization\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 5011, __PRETTY_FUNCTION__));
  return *reinterpret_cast<const QualType*>(end());
}

using iterator = const TemplateArgument *;

iterator begin() const { return getArgs(); }
iterator end() const; // defined inline in TemplateBase.h

/// Retrieve the name of the template that we are specializing.
TemplateName getTemplateName() const { return Template; }

/// Retrieve the template arguments.
const TemplateArgument *getArgs() const {
  return reinterpret_cast<const TemplateArgument *>(this + 1);
}

/// Retrieve the number of template arguments.
unsigned getNumArgs() const {
  return TemplateSpecializationTypeBits.NumArgs;
}

/// Retrieve a specific template argument as a type.
/// \pre \c isArgType(Arg)
const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h

ArrayRef<TemplateArgument> template_arguments() const {
  return {getArgs(), getNumArgs()};
}

bool isSugared() const {
  return !isDependentType() || isCurrentInstantiation() || isTypeAlias();
}

QualType desugar() const {
  return isTypeAlias() ? getAliasedType() : getCanonicalTypeInternal();
}

void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) {
  Profile(ID, Template, template_arguments(), Ctx);
  if (isTypeAlias())
    getAliasedType().Profile(ID);
}

static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T,
                    ArrayRef<TemplateArgument> Args,
                    const ASTContext &Context);

static bool classof(const Type *T) {
  return T->getTypeClass() == TemplateSpecialization;
}
5062};

5064/// Print a template argument list, including the '<' and '>'
5065/// enclosing the template arguments.
5066void printTemplateArgumentList(raw_ostream &OS,
                             ArrayRef<TemplateArgument> Args,
                             const PrintingPolicy &Policy);

5070void printTemplateArgumentList(raw_ostream &OS,
                             ArrayRef<TemplateArgumentLoc> Args,
                             const PrintingPolicy &Policy);

5074void printTemplateArgumentList(raw_ostream &OS,
                             const TemplateArgumentListInfo &Args,
                             const PrintingPolicy &Policy);

5078/// The injected class name of a C++ class template or class
5079/// template partial specialization.  Used to record that a type was
5080/// spelled with a bare identifier rather than as a template-id; the
5081/// equivalent for non-templated classes is just RecordType.
5082///
5083/// Injected class name types are always dependent.  Template
5084/// instantiation turns these into RecordTypes.
5085///
5086/// Injected class name types are always canonical.  This works
5087/// because it is impossible to compare an injected class name type
5088/// with the corresponding non-injected template type, for the same
5089/// reason that it is impossible to directly compare template
5090/// parameters from different dependent contexts: injected class name
5091/// types can only occur within the scope of a particular templated
5092/// declaration, and within that scope every template specialization
5093/// will canonicalize to the injected class name (when appropriate
5094/// according to the rules of the language).
5095class InjectedClassNameType : public Type {
friend class ASTContext; // ASTContext creates these.
friend class ASTNodeImporter;
friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not
                        // currently suitable for AST reading, too much
                        // interdependencies.
template <class T> friend class serialization::AbstractTypeReader;

CXXRecordDecl *Decl;

/// The template specialization which this type represents.
/// For example, in
///   template <class T> class A { ... };
/// this is A<T>, whereas in
///   template <class X, class Y> class A<B<X,Y> > { ... };
/// this is A<B<X,Y> >.
///
/// It is always unqualified, always a template specialization type,
/// and always dependent.
QualType InjectedType;

InjectedClassNameType(CXXRecordDecl *D, QualType TST)
    : Type(InjectedClassName, QualType(), /*Dependent=*/true,
           /*InstantiationDependent=*/true,
           /*VariablyModified=*/false,
           /*ContainsUnexpandedParameterPack=*/false),
      Decl(D), InjectedType(TST) {
  assert(isa<TemplateSpecializationType>(TST))((isa<TemplateSpecializationType>(TST)) ? static_cast<
void> (0) : __assert_fail ("isa<TemplateSpecializationType>(TST)"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 5122, __PRETTY_FUNCTION__));
  assert(!TST.hasQualifiers())((!TST.hasQualifiers()) ? static_cast<void> (0) : __assert_fail
 ("!TST.hasQualifiers()", "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 5123, __PRETTY_FUNCTION__));
  assert(TST->isDependentType())((TST->isDependentType()) ? static_cast<void> (0) : __assert_fail
 ("TST->isDependentType()", "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 5124, __PRETTY_FUNCTION__));
}

5127public:
QualType getInjectedSpecializationType() const { return InjectedType; }

const TemplateSpecializationType *getInjectedTST() const {
  return cast<TemplateSpecializationType>(InjectedType.getTypePtr());
}

TemplateName getTemplateName() const {
  return getInjectedTST()->getTemplateName();
}

CXXRecordDecl *getDecl() const;

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == InjectedClassName;
}
5146};

5148/// The kind of a tag type.
5149enum TagTypeKind {
/// The "struct" keyword.
TTK_Struct,

/// The "__interface" keyword.
TTK_Interface,

/// The "union" keyword.
TTK_Union,

/// The "class" keyword.
TTK_Class,

/// The "enum" keyword.
TTK_Enum
5164};

5166/// The elaboration keyword that precedes a qualified type name or
5167/// introduces an elaborated-type-specifier.
5168enum ElaboratedTypeKeyword {
/// The "struct" keyword introduces the elaborated-type-specifier.
ETK_Struct,

/// The "__interface" keyword introduces the elaborated-type-specifier.
ETK_Interface,

/// The "union" keyword introduces the elaborated-type-specifier.
ETK_Union,

/// The "class" keyword introduces the elaborated-type-specifier.
ETK_Class,

/// The "enum" keyword introduces the elaborated-type-specifier.
ETK_Enum,

/// The "typename" keyword precedes the qualified type name, e.g.,
/// \c typename T::type.
ETK_Typename,

/// No keyword precedes the qualified type name.
ETK_None
5190};

5192/// A helper class for Type nodes having an ElaboratedTypeKeyword.
5193/// The keyword in stored in the free bits of the base class.
5194/// Also provides a few static helpers for converting and printing
5195/// elaborated type keyword and tag type kind enumerations.
5196class TypeWithKeyword : public Type {
5197protected:
TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc,
                QualType Canonical, bool Dependent,
                bool InstantiationDependent, bool VariablyModified,
                bool ContainsUnexpandedParameterPack)
    : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified,
           ContainsUnexpandedParameterPack) {
  TypeWithKeywordBits.Keyword = Keyword;
}

5207public:
ElaboratedTypeKeyword getKeyword() const {
  return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword);
}

/// Converts a type specifier (DeclSpec::TST) into an elaborated type keyword.
static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec);

/// Converts a type specifier (DeclSpec::TST) into a tag type kind.
/// It is an error to provide a type specifier which *isn't* a tag kind here.
static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec);

/// Converts a TagTypeKind into an elaborated type keyword.
static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag);

/// Converts an elaborated type keyword into a TagTypeKind.
/// It is an error to provide an elaborated type keyword
/// which *isn't* a tag kind here.
static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword);

static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword);

static StringRef getKeywordName(ElaboratedTypeKeyword Keyword);

static StringRef getTagTypeKindName(TagTypeKind Kind) {
  return getKeywordName(getKeywordForTagTypeKind(Kind));
}

class CannotCastToThisType {};
static CannotCastToThisType classof(const Type *);
5237};

5239/// Represents a type that was referred to using an elaborated type
5240/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type,
5241/// or both.
5242///
5243/// This type is used to keep track of a type name as written in the
5244/// source code, including tag keywords and any nested-name-specifiers.
5245/// The type itself is always "sugar", used to express what was written
5246/// in the source code but containing no additional semantic information.
5247class ElaboratedType final
  : public TypeWithKeyword,
    public llvm::FoldingSetNode,
    private llvm::TrailingObjects<ElaboratedType, TagDecl *> {
friend class ASTContext; // ASTContext creates these
friend TrailingObjects;

/// The nested name specifier containing the qualifier.
NestedNameSpecifier *NNS;

/// The type that this qualified name refers to.
QualType NamedType;

/// The (re)declaration of this tag type owned by this occurrence is stored
/// as a trailing object if there is one. Use getOwnedTagDecl to obtain
/// it, or obtain a null pointer if there is none.

ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS,
               QualType NamedType, QualType CanonType, TagDecl *OwnedTagDecl)
    : TypeWithKeyword(Keyword, Elaborated, CanonType,
                      NamedType->isDependentType(),
                      NamedType->isInstantiationDependentType(),
                      NamedType->isVariablyModifiedType(),
                      NamedType->containsUnexpandedParameterPack()),
      NNS(NNS), NamedType(NamedType) {
  ElaboratedTypeBits.HasOwnedTagDecl = false;
  if (OwnedTagDecl) {
    ElaboratedTypeBits.HasOwnedTagDecl = true;
    *getTrailingObjects<TagDecl *>() = OwnedTagDecl;
  }
  assert(!(Keyword == ETK_None && NNS == nullptr) &&((!(Keyword == ETK_None && NNS == nullptr) &&
 "ElaboratedType cannot have elaborated type keyword " "and name qualifier both null."
) ? static_cast<void> (0) : __assert_fail ("!(Keyword == ETK_None && NNS == nullptr) && \"ElaboratedType cannot have elaborated type keyword \" \"and name qualifier both null.\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 5279, __PRETTY_FUNCTION__))
         "ElaboratedType cannot have elaborated type keyword "((!(Keyword == ETK_None && NNS == nullptr) &&
 "ElaboratedType cannot have elaborated type keyword " "and name qualifier both null."
) ? static_cast<void> (0) : __assert_fail ("!(Keyword == ETK_None && NNS == nullptr) && \"ElaboratedType cannot have elaborated type keyword \" \"and name qualifier both null.\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 5279, __PRETTY_FUNCTION__))
         "and name qualifier both null.")((!(Keyword == ETK_None && NNS == nullptr) &&
 "ElaboratedType cannot have elaborated type keyword " "and name qualifier both null."
) ? static_cast<void> (0) : __assert_fail ("!(Keyword == ETK_None && NNS == nullptr) && \"ElaboratedType cannot have elaborated type keyword \" \"and name qualifier both null.\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 5279, __PRETTY_FUNCTION__));
}

5282public:
/// Retrieve the qualification on this type.
NestedNameSpecifier *getQualifier() const { return NNS; }

/// Retrieve the type named by the qualified-id.
QualType getNamedType() const { return NamedType; }

/// Remove a single level of sugar.
QualType desugar() const { return getNamedType(); }

/// Returns whether this type directly provides sugar.
bool isSugared() const { return true; }

/// Return the (re)declaration of this type owned by this occurrence of this
/// type, or nullptr if there is none.
TagDecl *getOwnedTagDecl() const {
  return ElaboratedTypeBits.HasOwnedTagDecl ? *getTrailingObjects<TagDecl *>()
                                            : nullptr;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getKeyword(), NNS, NamedType, getOwnedTagDecl());
}

static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword,
                    NestedNameSpecifier *NNS, QualType NamedType,
                    TagDecl *OwnedTagDecl) {
  ID.AddInteger(Keyword);
  ID.AddPointer(NNS);
  NamedType.Profile(ID);
  ID.AddPointer(OwnedTagDecl);
}

static bool classof(const Type *T) { return T->getTypeClass() == Elaborated; }
5316};

5318/// Represents a qualified type name for which the type name is
5319/// dependent.
5320///
5321/// DependentNameType represents a class of dependent types that involve a
5322/// possibly dependent nested-name-specifier (e.g., "T::") followed by a
5323/// name of a type. The DependentNameType may start with a "typename" (for a
5324/// typename-specifier), "class", "struct", "union", or "enum" (for a
5325/// dependent elaborated-type-specifier), or nothing (in contexts where we
5326/// know that we must be referring to a type, e.g., in a base class specifier).
5327/// Typically the nested-name-specifier is dependent, but in MSVC compatibility
5328/// mode, this type is used with non-dependent names to delay name lookup until
5329/// instantiation.
5330class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these

/// The nested name specifier containing the qualifier.
NestedNameSpecifier *NNS;

/// The type that this typename specifier refers to.
const IdentifierInfo *Name;

DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS,
                  const IdentifierInfo *Name, QualType CanonType)
    : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true,
                      /*InstantiationDependent=*/true,
                      /*VariablyModified=*/false,
                      NNS->containsUnexpandedParameterPack()),
      NNS(NNS), Name(Name) {}

5347public:
/// Retrieve the qualification on this type.
NestedNameSpecifier *getQualifier() const { return NNS; }

/// Retrieve the type named by the typename specifier as an identifier.
///
/// This routine will return a non-NULL identifier pointer when the
/// form of the original typename was terminated by an identifier,
/// e.g., "typename T::type".
const IdentifierInfo *getIdentifier() const {
  return Name;
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getKeyword(), NNS, Name);
}

static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword,
                    NestedNameSpecifier *NNS, const IdentifierInfo *Name) {
  ID.AddInteger(Keyword);
  ID.AddPointer(NNS);
  ID.AddPointer(Name);
}

static bool classof(const Type *T) {
  return T->getTypeClass() == DependentName;
}
5377};

5379/// Represents a template specialization type whose template cannot be
5380/// resolved, e.g.
5381///   A<T>::template B<T>
5382class alignas(8) DependentTemplateSpecializationType
  : public TypeWithKeyword,
    public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these

/// The nested name specifier containing the qualifier.
NestedNameSpecifier *NNS;

/// The identifier of the template.
const IdentifierInfo *Name;

DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword,
                                    NestedNameSpecifier *NNS,
                                    const IdentifierInfo *Name,
                                    ArrayRef<TemplateArgument> Args,
                                    QualType Canon);

const TemplateArgument *getArgBuffer() const {
  return reinterpret_cast<const TemplateArgument*>(this+1);
}

TemplateArgument *getArgBuffer() {
  return reinterpret_cast<TemplateArgument*>(this+1);
}

5407public:
NestedNameSpecifier *getQualifier() const { return NNS; }
const IdentifierInfo *getIdentifier() const { return Name; }

/// Retrieve the template arguments.
const TemplateArgument *getArgs() const {
  return getArgBuffer();
}

/// Retrieve the number of template arguments.
unsigned getNumArgs() const {
  return DependentTemplateSpecializationTypeBits.NumArgs;
}

const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h

ArrayRef<TemplateArgument> template_arguments() const {
  return {getArgs(), getNumArgs()};
}

using iterator = const TemplateArgument *;

iterator begin() const { return getArgs(); }
iterator end() const; // inline in TemplateBase.h

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) {
  Profile(ID, Context, getKeyword(), NNS, Name, {getArgs(), getNumArgs()});
}

static void Profile(llvm::FoldingSetNodeID &ID,
                    const ASTContext &Context,
                    ElaboratedTypeKeyword Keyword,
                    NestedNameSpecifier *Qualifier,
                    const IdentifierInfo *Name,
                    ArrayRef<TemplateArgument> Args);

static bool classof(const Type *T) {
  return T->getTypeClass() == DependentTemplateSpecialization;
}
5449};

5451/// Represents a pack expansion of types.
5452///
5453/// Pack expansions are part of C++11 variadic templates. A pack
5454/// expansion contains a pattern, which itself contains one or more
5455/// "unexpanded" parameter packs. When instantiated, a pack expansion
5456/// produces a series of types, each instantiated from the pattern of
5457/// the expansion, where the Ith instantiation of the pattern uses the
5458/// Ith arguments bound to each of the unexpanded parameter packs. The
5459/// pack expansion is considered to "expand" these unexpanded
5460/// parameter packs.
5461///
5462/// \code
5463/// template<typename ...Types> struct tuple;
5464///
5465/// template<typename ...Types>
5466/// struct tuple_of_references {
5467///   typedef tuple<Types&...> type;
5468/// };
5469/// \endcode
5470///
5471/// Here, the pack expansion \c Types&... is represented via a
5472/// PackExpansionType whose pattern is Types&.
5473class PackExpansionType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these

/// The pattern of the pack expansion.
QualType Pattern;

PackExpansionType(QualType Pattern, QualType Canon,
                  Optional<unsigned> NumExpansions)
    : Type(PackExpansion, Canon, /*Dependent=*/Pattern->isDependentType(),
           /*InstantiationDependent=*/true,
           /*VariablyModified=*/Pattern->isVariablyModifiedType(),
           /*ContainsUnexpandedParameterPack=*/false),
      Pattern(Pattern) {
  PackExpansionTypeBits.NumExpansions =
      NumExpansions ? *NumExpansions + 1 : 0;
}

5490public:
/// Retrieve the pattern of this pack expansion, which is the
/// type that will be repeatedly instantiated when instantiating the
/// pack expansion itself.
QualType getPattern() const { return Pattern; }

/// Retrieve the number of expansions that this pack expansion will
/// generate, if known.
Optional<unsigned> getNumExpansions() const {
  if (PackExpansionTypeBits.NumExpansions)
    return PackExpansionTypeBits.NumExpansions - 1;
  return None;
}

bool isSugared() const { return !Pattern->isDependentType(); }
QualType desugar() const { return isSugared() ? Pattern : QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getPattern(), getNumExpansions());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern,
                    Optional<unsigned> NumExpansions) {
  ID.AddPointer(Pattern.getAsOpaquePtr());
  ID.AddBoolean(NumExpansions.hasValue());
  if (NumExpansions)
    ID.AddInteger(*NumExpansions);
}

static bool classof(const Type *T) {
  return T->getTypeClass() == PackExpansion;
}
5522};

5524/// This class wraps the list of protocol qualifiers. For types that can
5525/// take ObjC protocol qualifers, they can subclass this class.
5526template <class T>
5527class ObjCProtocolQualifiers {
5528protected:
ObjCProtocolQualifiers() = default;

ObjCProtocolDecl * const *getProtocolStorage() const {
  return const_cast<ObjCProtocolQualifiers*>(this)->getProtocolStorage();
}

ObjCProtocolDecl **getProtocolStorage() {
  return static_cast<T*>(this)->getProtocolStorageImpl();
}

void setNumProtocols(unsigned N) {
  static_cast<T*>(this)->setNumProtocolsImpl(N);
}

void initialize(ArrayRef<ObjCProtocolDecl *> protocols) {
  setNumProtocols(protocols.size());
  assert(getNumProtocols() == protocols.size() &&((getNumProtocols() == protocols.size() && "bitfield overflow in protocol count"
) ? static_cast<void> (0) : __assert_fail ("getNumProtocols() == protocols.size() && \"bitfield overflow in protocol count\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 5546, __PRETTY_FUNCTION__))
         "bitfield overflow in protocol count")((getNumProtocols() == protocols.size() && "bitfield overflow in protocol count"
) ? static_cast<void> (0) : __assert_fail ("getNumProtocols() == protocols.size() && \"bitfield overflow in protocol count\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 5546, __PRETTY_FUNCTION__));
  if (!protocols.empty())
    memcpy(getProtocolStorage(), protocols.data(),
           protocols.size() * sizeof(ObjCProtocolDecl*));
}

5552public:
using qual_iterator = ObjCProtocolDecl * const *;
using qual_range = llvm::iterator_range<qual_iterator>;

qual_range quals() const { return qual_range(qual_begin(), qual_end()); }
qual_iterator qual_begin() const { return getProtocolStorage(); }
qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); }

bool qual_empty() const { return getNumProtocols() == 0; }

/// Return the number of qualifying protocols in this type, or 0 if
/// there are none.
unsigned getNumProtocols() const {
  return static_cast<const T*>(this)->getNumProtocolsImpl();
}

/// Fetch a protocol by index.
ObjCProtocolDecl *getProtocol(unsigned I) const {
  assert(I < getNumProtocols() && "Out-of-range protocol access")((I < getNumProtocols() && "Out-of-range protocol access"
) ? static_cast<void> (0) : __assert_fail ("I < getNumProtocols() && \"Out-of-range protocol access\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 5570, __PRETTY_FUNCTION__));
  return qual_begin()[I];
}

/// Retrieve all of the protocol qualifiers.
ArrayRef<ObjCProtocolDecl *> getProtocols() const {
  return ArrayRef<ObjCProtocolDecl *>(qual_begin(), getNumProtocols());
}
5578};

5580/// Represents a type parameter type in Objective C. It can take
5581/// a list of protocols.
5582class ObjCTypeParamType : public Type,
                        public ObjCProtocolQualifiers<ObjCTypeParamType>,
                        public llvm::FoldingSetNode {
friend class ASTContext;
friend class ObjCProtocolQualifiers<ObjCTypeParamType>;

/// The number of protocols stored on this type.
unsigned NumProtocols : 6;

ObjCTypeParamDecl *OTPDecl;

/// The protocols are stored after the ObjCTypeParamType node. In the
/// canonical type, the list of protocols are sorted alphabetically
/// and uniqued.
ObjCProtocolDecl **getProtocolStorageImpl();

/// Return the number of qualifying protocols in this interface type,
/// or 0 if there are none.
unsigned getNumProtocolsImpl() const {
  return NumProtocols;
}

void setNumProtocolsImpl(unsigned N) {
  NumProtocols = N;
}

ObjCTypeParamType(const ObjCTypeParamDecl *D,
                  QualType can,
                  ArrayRef<ObjCProtocolDecl *> protocols);

5612public:
bool isSugared() const { return true; }
QualType desugar() const { return getCanonicalTypeInternal(); }

static bool classof(const Type *T) {
  return T->getTypeClass() == ObjCTypeParam;
}

void Profile(llvm::FoldingSetNodeID &ID);
static void Profile(llvm::FoldingSetNodeID &ID,
                    const ObjCTypeParamDecl *OTPDecl,
                    ArrayRef<ObjCProtocolDecl *> protocols);

ObjCTypeParamDecl *getDecl() const { return OTPDecl; }
5626};

5628/// Represents a class type in Objective C.
5629///
5630/// Every Objective C type is a combination of a base type, a set of
5631/// type arguments (optional, for parameterized classes) and a list of
5632/// protocols.
5633///
5634/// Given the following declarations:
5635/// \code
5636///   \@class C<T>;
5637///   \@protocol P;
5638/// \endcode
5639///
5640/// 'C' is an ObjCInterfaceType C.  It is sugar for an ObjCObjectType
5641/// with base C and no protocols.
5642///
5643/// 'C<P>' is an unspecialized ObjCObjectType with base C and protocol list [P].
5644/// 'C<C*>' is a specialized ObjCObjectType with type arguments 'C*' and no
5645/// protocol list.
5646/// 'C<C*><P>' is a specialized ObjCObjectType with base C, type arguments 'C*',
5647/// and protocol list [P].
5648///
5649/// 'id' is a TypedefType which is sugar for an ObjCObjectPointerType whose
5650/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType
5651/// and no protocols.
5652///
5653/// 'id<P>' is an ObjCObjectPointerType whose pointee is an ObjCObjectType
5654/// with base BuiltinType::ObjCIdType and protocol list [P].  Eventually
5655/// this should get its own sugar class to better represent the source.
5656class ObjCObjectType : public Type,
                     public ObjCProtocolQualifiers<ObjCObjectType> {
friend class ObjCProtocolQualifiers<ObjCObjectType>;

// ObjCObjectType.NumTypeArgs - the number of type arguments stored
// after the ObjCObjectPointerType node.
// ObjCObjectType.NumProtocols - the number of protocols stored
// after the type arguments of ObjCObjectPointerType node.
//
// These protocols are those written directly on the type.  If
// protocol qualifiers ever become additive, the iterators will need
// to get kindof complicated.
//
// In the canonical object type, these are sorted alphabetically
// and uniqued.

/// Either a BuiltinType or an InterfaceType or sugar for either.
QualType BaseType;

/// Cached superclass type.
mutable llvm::PointerIntPair<const ObjCObjectType *, 1, bool>
  CachedSuperClassType;

QualType *getTypeArgStorage();
const QualType *getTypeArgStorage() const {
  return const_cast<ObjCObjectType *>(this)->getTypeArgStorage();
}

ObjCProtocolDecl **getProtocolStorageImpl();
/// Return the number of qualifying protocols in this interface type,
/// or 0 if there are none.
unsigned getNumProtocolsImpl() const {
  return ObjCObjectTypeBits.NumProtocols;
}
void setNumProtocolsImpl(unsigned N) {
  ObjCObjectTypeBits.NumProtocols = N;
}

5694protected:
enum Nonce_ObjCInterface { Nonce_ObjCInterface };

ObjCObjectType(QualType Canonical, QualType Base,
               ArrayRef<QualType> typeArgs,
               ArrayRef<ObjCProtocolDecl *> protocols,
               bool isKindOf);

ObjCObjectType(enum Nonce_ObjCInterface)
      : Type(ObjCInterface, QualType(), false, false, false, false),
        BaseType(QualType(this_(), 0)) {
  ObjCObjectTypeBits.NumProtocols = 0;
  ObjCObjectTypeBits.NumTypeArgs = 0;
  ObjCObjectTypeBits.IsKindOf = 0;
}

void computeSuperClassTypeSlow() const;

5712public:
/// Gets the base type of this object type.  This is always (possibly
/// sugar for) one of:
///  - the 'id' builtin type (as opposed to the 'id' type visible to the
///    user, which is a typedef for an ObjCObjectPointerType)
///  - the 'Class' builtin type (same caveat)
///  - an ObjCObjectType (currently always an ObjCInterfaceType)
QualType getBaseType() const { return BaseType; }

bool isObjCId() const {
  return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId);
}

bool isObjCClass() const {
  return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass);
}

bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); }
bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); }
bool isObjCUnqualifiedIdOrClass() const {
  if (!qual_empty()) return false;
  if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>())
    return T->getKind() == BuiltinType::ObjCId ||
           T->getKind() == BuiltinType::ObjCClass;
  return false;
}
bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); }
bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); }

/// Gets the interface declaration for this object type, if the base type
/// really is an interface.
ObjCInterfaceDecl *getInterface() const;

/// Determine whether this object type is "specialized", meaning
/// that it has type arguments.
bool isSpecialized() const;

/// Determine whether this object type was written with type arguments.
bool isSpecializedAsWritten() const {
  return ObjCObjectTypeBits.NumTypeArgs > 0;
}

/// Determine whether this object type is "unspecialized", meaning
/// that it has no type arguments.
bool isUnspecialized() const { return !isSpecialized(); }

/// Determine whether this object type is "unspecialized" as
/// written, meaning that it has no type arguments.
bool isUnspecializedAsWritten() const { return !isSpecializedAsWritten(); }

/// Retrieve the type arguments of this object type (semantically).
ArrayRef<QualType> getTypeArgs() const;

/// Retrieve the type arguments of this object type as they were
/// written.
ArrayRef<QualType> getTypeArgsAsWritten() const {
  return llvm::makeArrayRef(getTypeArgStorage(),
                            ObjCObjectTypeBits.NumTypeArgs);
}

/// Whether this is a "__kindof" type as written.
bool isKindOfTypeAsWritten() const { return ObjCObjectTypeBits.IsKindOf; }

/// Whether this ia a "__kindof" type (semantically).
bool isKindOfType() const;

/// Retrieve the type of the superclass of this object type.
///
/// This operation substitutes any type arguments into the
/// superclass of the current class type, potentially producing a
/// specialization of the superclass type. Produces a null type if
/// there is no superclass.
QualType getSuperClassType() const {
  if (!CachedSuperClassType.getInt())
    computeSuperClassTypeSlow();

  assert(CachedSuperClassType.getInt() && "Superclass not set?")((CachedSuperClassType.getInt() && "Superclass not set?"
) ? static_cast<void> (0) : __assert_fail ("CachedSuperClassType.getInt() && \"Superclass not set?\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 5788, __PRETTY_FUNCTION__));
  return QualType(CachedSuperClassType.getPointer(), 0);
}

/// Strip off the Objective-C "kindof" type and (with it) any
/// protocol qualifiers.
QualType stripObjCKindOfTypeAndQuals(const ASTContext &ctx) const;

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == ObjCObject ||
         T->getTypeClass() == ObjCInterface;
}
5803};

5805/// A class providing a concrete implementation
5806/// of ObjCObjectType, so as to not increase the footprint of
5807/// ObjCInterfaceType.  Code outside of ASTContext and the core type
5808/// system should not reference this type.
5809class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode {
friend class ASTContext;

// If anyone adds fields here, ObjCObjectType::getProtocolStorage()
// will need to be modified.

ObjCObjectTypeImpl(QualType Canonical, QualType Base,
                   ArrayRef<QualType> typeArgs,
                   ArrayRef<ObjCProtocolDecl *> protocols,
                   bool isKindOf)
    : ObjCObjectType(Canonical, Base, typeArgs, protocols, isKindOf) {}

5821public:
void Profile(llvm::FoldingSetNodeID &ID);
static void Profile(llvm::FoldingSetNodeID &ID,
                    QualType Base,
                    ArrayRef<QualType> typeArgs,
                    ArrayRef<ObjCProtocolDecl *> protocols,
                    bool isKindOf);
5828};

5830inline QualType *ObjCObjectType::getTypeArgStorage() {
return reinterpret_cast<QualType *>(static_cast<ObjCObjectTypeImpl*>(this)+1);
5832}

5834inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorageImpl() {
  return reinterpret_cast<ObjCProtocolDecl**>(
           getTypeArgStorage() + ObjCObjectTypeBits.NumTypeArgs);
5837}

5839inline ObjCProtocolDecl **ObjCTypeParamType::getProtocolStorageImpl() {
  return reinterpret_cast<ObjCProtocolDecl**>(
           static_cast<ObjCTypeParamType*>(this)+1);
5842}

5844/// Interfaces are the core concept in Objective-C for object oriented design.
5845/// They basically correspond to C++ classes.  There are two kinds of interface
5846/// types: normal interfaces like `NSString`, and qualified interfaces, which
5847/// are qualified with a protocol list like `NSString<NSCopyable, NSAmazing>`.
5848///
5849/// ObjCInterfaceType guarantees the following properties when considered
5850/// as a subtype of its superclass, ObjCObjectType:
5851///   - There are no protocol qualifiers.  To reinforce this, code which
5852///     tries to invoke the protocol methods via an ObjCInterfaceType will
5853///     fail to compile.
5854///   - It is its own base type.  That is, if T is an ObjCInterfaceType*,
5855///     T->getBaseType() == QualType(T, 0).
5856class ObjCInterfaceType : public ObjCObjectType {
friend class ASTContext; // ASTContext creates these.
friend class ASTReader;
friend class ObjCInterfaceDecl;
template <class T> friend class serialization::AbstractTypeReader;

mutable ObjCInterfaceDecl *Decl;

ObjCInterfaceType(const ObjCInterfaceDecl *D)
    : ObjCObjectType(Nonce_ObjCInterface),
      Decl(const_cast<ObjCInterfaceDecl*>(D)) {}

5868public:
/// Get the declaration of this interface.
ObjCInterfaceDecl *getDecl() const { return Decl; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == ObjCInterface;
}

// Nonsense to "hide" certain members of ObjCObjectType within this
// class.  People asking for protocols on an ObjCInterfaceType are
// not going to get what they want: ObjCInterfaceTypes are
// guaranteed to have no protocols.
enum {
  qual_iterator,
  qual_begin,
  qual_end,
  getNumProtocols,
  getProtocol
};
5890};

5892inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const {
QualType baseType = getBaseType();
while (const auto *ObjT = baseType->getAs<ObjCObjectType>()) {
  if (const auto *T = dyn_cast<ObjCInterfaceType>(ObjT))
    return T->getDecl();

  baseType = ObjT->getBaseType();
}

return nullptr;
5902}

5904/// Represents a pointer to an Objective C object.
5905///
5906/// These are constructed from pointer declarators when the pointee type is
5907/// an ObjCObjectType (or sugar for one).  In addition, the 'id' and 'Class'
5908/// types are typedefs for these, and the protocol-qualified types 'id<P>'
5909/// and 'Class<P>' are translated into these.
5910///
5911/// Pointers to pointers to Objective C objects are still PointerTypes;
5912/// only the first level of pointer gets it own type implementation.
5913class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these.

QualType PointeeType;

ObjCObjectPointerType(QualType Canonical, QualType Pointee)
    : Type(ObjCObjectPointer, Canonical,
           Pointee->isDependentType(),
           Pointee->isInstantiationDependentType(),
           Pointee->isVariablyModifiedType(),
           Pointee->containsUnexpandedParameterPack()),
      PointeeType(Pointee) {}

5926public:
/// Gets the type pointed to by this ObjC pointer.
/// The result will always be an ObjCObjectType or sugar thereof.
QualType getPointeeType() const { return PointeeType; }

/// Gets the type pointed to by this ObjC pointer.  Always returns non-null.
///
/// This method is equivalent to getPointeeType() except that
/// it discards any typedefs (or other sugar) between this
/// type and the "outermost" object type.  So for:
/// \code
///   \@class A; \@protocol P; \@protocol Q;
///   typedef A<P> AP;
///   typedef A A1;
///   typedef A1<P> A1P;
///   typedef A1P<Q> A1PQ;
/// \endcode
/// For 'A*', getObjectType() will return 'A'.
/// For 'A<P>*', getObjectType() will return 'A<P>'.
/// For 'AP*', getObjectType() will return 'A<P>'.
/// For 'A1*', getObjectType() will return 'A'.
/// For 'A1<P>*', getObjectType() will return 'A1<P>'.
/// For 'A1P*', getObjectType() will return 'A1<P>'.
/// For 'A1PQ*', getObjectType() will return 'A1<Q>', because
///   adding protocols to a protocol-qualified base discards the
///   old qualifiers (for now).  But if it didn't, getObjectType()
///   would return 'A1P<Q>' (and we'd have to make iterating over
///   qualifiers more complicated).
const ObjCObjectType *getObjectType() const {
  return PointeeType->castAs<ObjCObjectType>();
}

/// If this pointer points to an Objective C
/// \@interface type, gets the type for that interface.  Any protocol
/// qualifiers on the interface are ignored.
///
/// \return null if the base type for this pointer is 'id' or 'Class'
const ObjCInterfaceType *getInterfaceType() const;

/// If this pointer points to an Objective \@interface
/// type, gets the declaration for that interface.
///
/// \return null if the base type for this pointer is 'id' or 'Class'
ObjCInterfaceDecl *getInterfaceDecl() const {
  return getObjectType()->getInterface();
}

/// True if this is equivalent to the 'id' type, i.e. if
/// its object type is the primitive 'id' type with no protocols.
bool isObjCIdType() const {
  return getObjectType()->isObjCUnqualifiedId();
}

/// True if this is equivalent to the 'Class' type,
/// i.e. if its object tive is the primitive 'Class' type with no protocols.
bool isObjCClassType() const {
  return getObjectType()->isObjCUnqualifiedClass();
}

/// True if this is equivalent to the 'id' or 'Class' type,
bool isObjCIdOrClassType() const {
  return getObjectType()->isObjCUnqualifiedIdOrClass();
}

/// True if this is equivalent to 'id<P>' for some non-empty set of
/// protocols.
bool isObjCQualifiedIdType() const {
  return getObjectType()->isObjCQualifiedId();
}

/// True if this is equivalent to 'Class<P>' for some non-empty set of
/// protocols.
bool isObjCQualifiedClassType() const {
  return getObjectType()->isObjCQualifiedClass();
}

/// Whether this is a "__kindof" type.
bool isKindOfType() const { return getObjectType()->isKindOfType(); }

/// Whether this type is specialized, meaning that it has type arguments.
bool isSpecialized() const { return getObjectType()->isSpecialized(); }

/// Whether this type is specialized, meaning that it has type arguments.
bool isSpecializedAsWritten() const {
  return getObjectType()->isSpecializedAsWritten();
}

/// Whether this type is unspecialized, meaning that is has no type arguments.
bool isUnspecialized() const { return getObjectType()->isUnspecialized(); }

/// Determine whether this object type is "unspecialized" as
/// written, meaning that it has no type arguments.
bool isUnspecializedAsWritten() const { return !isSpecializedAsWritten(); }

/// Retrieve the type arguments for this type.
ArrayRef<QualType> getTypeArgs() const {
  return getObjectType()->getTypeArgs();
}

/// Retrieve the type arguments for this type.
ArrayRef<QualType> getTypeArgsAsWritten() const {
  return getObjectType()->getTypeArgsAsWritten();
}

/// An iterator over the qualifiers on the object type.  Provided
/// for convenience.  This will always iterate over the full set of
/// protocols on a type, not just those provided directly.
using qual_iterator = ObjCObjectType::qual_iterator;
using qual_range = llvm::iterator_range<qual_iterator>;

qual_range quals() const { return qual_range(qual_begin(), qual_end()); }

qual_iterator qual_begin() const {
  return getObjectType()->qual_begin();
}

qual_iterator qual_end() const {
  return getObjectType()->qual_end();
}

bool qual_empty() const { return getObjectType()->qual_empty(); }

/// Return the number of qualifying protocols on the object type.
unsigned getNumProtocols() const {
  return getObjectType()->getNumProtocols();
}

/// Retrieve a qualifying protocol by index on the object type.
ObjCProtocolDecl *getProtocol(unsigned I) const {
  return getObjectType()->getProtocol(I);
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

/// Retrieve the type of the superclass of this object pointer type.
///
/// This operation substitutes any type arguments into the
/// superclass of the current class type, potentially producing a
/// pointer to a specialization of the superclass type. Produces a
/// null type if there is no superclass.
QualType getSuperClassType() const;

/// Strip off the Objective-C "kindof" type and (with it) any
/// protocol qualifiers.
const ObjCObjectPointerType *stripObjCKindOfTypeAndQuals(
                               const ASTContext &ctx) const;

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getPointeeType());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType T) {
  ID.AddPointer(T.getAsOpaquePtr());
}

static bool classof(const Type *T) {
  return T->getTypeClass() == ObjCObjectPointer;
}
6085};

6087class AtomicType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these.

QualType ValueType;

AtomicType(QualType ValTy, QualType Canonical)
    : Type(Atomic, Canonical, ValTy->isDependentType(),
           ValTy->isInstantiationDependentType(),
           ValTy->isVariablyModifiedType(),
           ValTy->containsUnexpandedParameterPack()),
      ValueType(ValTy) {}

6099public:
/// Gets the type contained by this atomic type, i.e.
/// the type returned by performing an atomic load of this atomic type.
QualType getValueType() const { return ValueType; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getValueType());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType T) {
  ID.AddPointer(T.getAsOpaquePtr());
}

static bool classof(const Type *T) {
  return T->getTypeClass() == Atomic;
}
6118};

6120/// PipeType - OpenCL20.
6121class PipeType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these.

QualType ElementType;
bool isRead;

PipeType(QualType elemType, QualType CanonicalPtr, bool isRead)
    : Type(Pipe, CanonicalPtr, elemType->isDependentType(),
           elemType->isInstantiationDependentType(),
           elemType->isVariablyModifiedType(),
           elemType->containsUnexpandedParameterPack()),
      ElementType(elemType), isRead(isRead) {}

6134public:
QualType getElementType() const { return ElementType; }

bool isSugared() const { return false; }

QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getElementType(), isReadOnly());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType T, bool isRead) {
  ID.AddPointer(T.getAsOpaquePtr());
  ID.AddBoolean(isRead);
}

static bool classof(const Type *T) {
  return T->getTypeClass() == Pipe;
}

bool isReadOnly() const { return isRead; }
6155};

6157/// A qualifier set is used to build a set of qualifiers.
6158class QualifierCollector : public Qualifiers {
6159public:
QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {}

/// Collect any qualifiers on the given type and return an
/// unqualified type.  The qualifiers are assumed to be consistent
/// with those already in the type.
const Type *strip(QualType type) {
  addFastQualifiers(type.getLocalFastQualifiers());
  if (!type.hasLocalNonFastQualifiers())
    return type.getTypePtrUnsafe();

  const ExtQuals *extQuals = type.getExtQualsUnsafe();
  addConsistentQualifiers(extQuals->getQualifiers());
  return extQuals->getBaseType();
}

/// Apply the collected qualifiers to the given type.
QualType apply(const ASTContext &Context, QualType QT) const;

/// Apply the collected qualifiers to the given type.
QualType apply(const ASTContext &Context, const Type* T) const;
6180};

6182/// A container of type source information.
6183///
6184/// A client can read the relevant info using TypeLoc wrappers, e.g:
6185/// @code
6186/// TypeLoc TL = TypeSourceInfo->getTypeLoc();
6187/// TL.getBeginLoc().print(OS, SrcMgr);
6188/// @endcode
6189class alignas(8) TypeSourceInfo {
// Contains a memory block after the class, used for type source information,
// allocated by ASTContext.
friend class ASTContext;

QualType Ty;

TypeSourceInfo(QualType ty) : Ty(ty) {}

6198public:
/// Return the type wrapped by this type source info.
QualType getType() const { return Ty; }

/// Return the TypeLoc wrapper for the type source info.
TypeLoc getTypeLoc() const; // implemented in TypeLoc.h

/// Override the type stored in this TypeSourceInfo. Use with caution!
void overrideType(QualType T) { Ty = T; }
6207};

6209// Inline function definitions.

6211inline SplitQualType SplitQualType::getSingleStepDesugaredType() const {
SplitQualType desugar =
  Ty->getLocallyUnqualifiedSingleStepDesugaredType().split();
desugar.Quals.addConsistentQualifiers(Quals);
return desugar;
6216}

6218inline const Type *QualType::getTypePtr() const {
return getCommonPtr()->BaseType;
6220}

6222inline const Type *QualType::getTypePtrOrNull() const {
return (isNull() ? nullptr : getCommonPtr()->BaseType);
6224}

6226inline SplitQualType QualType::split() const {
if (!hasLocalNonFastQualifiers())
  return SplitQualType(getTypePtrUnsafe(),
                       Qualifiers::fromFastMask(getLocalFastQualifiers()));

const ExtQuals *eq = getExtQualsUnsafe();
Qualifiers qs = eq->getQualifiers();
qs.addFastQualifiers(getLocalFastQualifiers());
return SplitQualType(eq->getBaseType(), qs);
6235}

6237inline Qualifiers QualType::getLocalQualifiers() const {
Qualifiers Quals;
if (hasLocalNonFastQualifiers())
  Quals = getExtQualsUnsafe()->getQualifiers();
Quals.addFastQualifiers(getLocalFastQualifiers());
return Quals;
6243}

6245inline Qualifiers QualType::getQualifiers() const {
Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers();
quals.addFastQualifiers(getLocalFastQualifiers());
return quals;
6249}

6251inline unsigned QualType::getCVRQualifiers() const {
unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers();
cvr |= getLocalCVRQualifiers();
return cvr;
6255}

6257inline QualType QualType::getCanonicalType() const {
QualType canon = getCommonPtr()->CanonicalType;
return canon.withFastQualifiers(getLocalFastQualifiers());
6260}

6262inline bool QualType::isCanonical() const {
return getTypePtr()->isCanonicalUnqualified();
6264}

6266inline bool QualType::isCanonicalAsParam() const {
if (!isCanonical()) return false;
if (hasLocalQualifiers()) return false;

const Type *T = getTypePtr();
if (T->isVariablyModifiedType() && T->hasSizedVLAType())
  return false;

return !isa<FunctionType>(T) && !isa<ArrayType>(T);
6275}

6277inline bool QualType::isConstQualified() const {
return isLocalConstQualified() ||
       getCommonPtr()->CanonicalType.isLocalConstQualified();
6280}

6282inline bool QualType::isRestrictQualified() const {
return isLocalRestrictQualified() ||
       getCommonPtr()->CanonicalType.isLocalRestrictQualified();
6285}


6288inline bool QualType::isVolatileQualified() const {
return isLocalVolatileQualified() ||
       getCommonPtr()->CanonicalType.isLocalVolatileQualified();
6291}

6293inline bool QualType::hasQualifiers() const {
return hasLocalQualifiers() ||
       getCommonPtr()->CanonicalType.hasLocalQualifiers();
6296}

6298inline QualType QualType::getUnqualifiedType() const {
if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers())
  return QualType(getTypePtr(), 0);

return QualType(getSplitUnqualifiedTypeImpl(*this).Ty, 0);
6303}

6305inline SplitQualType QualType::getSplitUnqualifiedType() const {
if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers())
  return split();

return getSplitUnqualifiedTypeImpl(*this);
6310}

6312inline void QualType::removeLocalConst() {
removeLocalFastQualifiers(Qualifiers::Const);
6314}

6316inline void QualType::removeLocalRestrict() {
removeLocalFastQualifiers(Qualifiers::Restrict);
6318}

6320inline void QualType::removeLocalVolatile() {
removeLocalFastQualifiers(Qualifiers::Volatile);
6322}

6324inline void QualType::removeLocalCVRQualifiers(unsigned Mask) {
assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits")((!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"
) ? static_cast<void> (0) : __assert_fail ("!(Mask & ~Qualifiers::CVRMask) && \"mask has non-CVR bits\""
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 6325, __PRETTY_FUNCTION__));
static_assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask,
              "Fast bits differ from CVR bits!");

// Fast path: we don't need to touch the slow qualifiers.
removeLocalFastQualifiers(Mask);
6331}

6333/// Check if this type has any address space qualifier.
6334inline bool QualType::hasAddressSpace() const {
return getQualifiers().hasAddressSpace();
6336}

6338/// Return the address space of this type.
6339inline LangAS QualType::getAddressSpace() const {
return getQualifiers().getAddressSpace();
6341}

6343/// Return the gc attribute of this type.
6344inline Qualifiers::GC QualType::getObjCGCAttr() const {
return getQualifiers().getObjCGCAttr();
6346}

6348inline bool QualType::hasNonTrivialToPrimitiveDefaultInitializeCUnion() const {
if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl())
  return hasNonTrivialToPrimitiveDefaultInitializeCUnion(RD);
return false;
6352}

6354inline bool QualType::hasNonTrivialToPrimitiveDestructCUnion() const {
if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl())
  return hasNonTrivialToPrimitiveDestructCUnion(RD);
return false;
6358}

6360inline bool QualType::hasNonTrivialToPrimitiveCopyCUnion() const {
if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl())
  return hasNonTrivialToPrimitiveCopyCUnion(RD);
return false;
6364}

6366inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) {
if (const auto *PT = t.getAs<PointerType>()) {
  if (const auto *FT = PT->getPointeeType()->getAs<FunctionType>())
    return FT->getExtInfo();
} else if (const auto *FT = t.getAs<FunctionType>())
  return FT->getExtInfo();

return FunctionType::ExtInfo();
6374}

6376inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) {
return getFunctionExtInfo(*t);
6378}

6380/// Determine whether this type is more
6381/// qualified than the Other type. For example, "const volatile int"
6382/// is more qualified than "const int", "volatile int", and
6383/// "int". However, it is not more qualified than "const volatile
6384/// int".
6385inline bool QualType::isMoreQualifiedThan(QualType other) const {
Qualifiers MyQuals = getQualifiers();
Qualifiers OtherQuals = other.getQualifiers();
return (MyQuals != OtherQuals && MyQuals.compatiblyIncludes(OtherQuals));
6389}

6391/// Determine whether this type is at last
6392/// as qualified as the Other type. For example, "const volatile
6393/// int" is at least as qualified as "const int", "volatile int",
6394/// "int", and "const volatile int".
6395inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const {
Qualifiers OtherQuals = other.getQualifiers();

// Ignore __unaligned qualifier if this type is a void.
if (getUnqualifiedType()->isVoidType())
  OtherQuals.removeUnaligned();

return getQualifiers().compatiblyIncludes(OtherQuals);
6403}

6405/// If Type is a reference type (e.g., const
6406/// int&), returns the type that the reference refers to ("const
6407/// int"). Otherwise, returns the type itself. This routine is used
6408/// throughout Sema to implement C++ 5p6:
6409///
6410///   If an expression initially has the type "reference to T" (8.3.2,
6411///   8.5.3), the type is adjusted to "T" prior to any further
6412///   analysis, the expression designates the object or function
6413///   denoted by the reference, and the expression is an lvalue.
6414inline QualType QualType::getNonReferenceType() const {
if (const auto *RefType = (*this)->getAs<ReferenceType>())
  return RefType->getPointeeType();
else
  return *this;
6419}

6421inline bool QualType::isCForbiddenLValueType() const {
return ((getTypePtr()->isVoidType() && !hasQualifiers()) ||
        getTypePtr()->isFunctionType());
6424}

6426/// Tests whether the type is categorized as a fundamental type.
6427///
6428/// \returns True for types specified in C++0x [basic.fundamental].
6429inline bool Type::isFundamentalType() const {
return isVoidType() ||
       isNullPtrType() ||
       // FIXME: It's really annoying that we don't have an
       // 'isArithmeticType()' which agrees with the standard definition.
       (isArithmeticType() && !isEnumeralType());
6435}

6437/// Tests whether the type is categorized as a compound type.
6438///
6439/// \returns True for types specified in C++0x [basic.compound].
6440inline bool Type::isCompoundType() const {
// C++0x [basic.compound]p1:
//   Compound types can be constructed in the following ways:
//    -- arrays of objects of a given type [...];
return isArrayType() ||
//    -- functions, which have parameters of given types [...];
       isFunctionType() ||
//    -- pointers to void or objects or functions [...];
       isPointerType() ||
//    -- references to objects or functions of a given type. [...]
       isReferenceType() ||
//    -- classes containing a sequence of objects of various types, [...];
       isRecordType() ||
//    -- unions, which are classes capable of containing objects of different
//               types at different times;
       isUnionType() ||
//    -- enumerations, which comprise a set of named constant values. [...];
       isEnumeralType() ||
//    -- pointers to non-static class members, [...].
       isMemberPointerType();
6460}

6462inline bool Type::isFunctionType() const {
return isa<FunctionType>(CanonicalType);
6464}

6466inline bool Type::isPointerType() const {
return isa<PointerType>(CanonicalType);
6468}

6470inline bool Type::isAnyPointerType() const {
return isPointerType() || isObjCObjectPointerType();
6472}

6474inline bool Type::isBlockPointerType() const {
return isa<BlockPointerType>(CanonicalType);
6476}

6478inline bool Type::isReferenceType() const {
return isa<ReferenceType>(CanonicalType);
6480}

6482inline bool Type::isLValueReferenceType() const {
return isa<LValueReferenceType>(CanonicalType);
6484}

6486inline bool Type::isRValueReferenceType() const {
return isa<RValueReferenceType>(CanonicalType);
6488}

6490inline bool Type::isObjectPointerType() const {
// Note: an "object pointer type" is not the same thing as a pointer to an
// object type; rather, it is a pointer to an object type or a pointer to cv
// void.
if (const auto *T = getAs<PointerType>())
  return !T->getPointeeType()->isFunctionType();
else
  return false;
6498}

6500inline bool Type::isFunctionPointerType() const {
if (const auto *T = getAs<PointerType>())
  return T->getPointeeType()->isFunctionType();
else
  return false;
6505}

6507inline bool Type::isFunctionReferenceType() const {
if (const auto *T = getAs<ReferenceType>())
  return T->getPointeeType()->isFunctionType();
else
  return false;
6512}

6514inline bool Type::isMemberPointerType() const {
return isa<MemberPointerType>(CanonicalType);
6516}

6518inline bool Type::isMemberFunctionPointerType() const {
if (const auto *T = getAs<MemberPointerType>())
  return T->isMemberFunctionPointer();
else
  return false;
6523}

6525inline bool Type::isMemberDataPointerType() const {
if (const auto *T = getAs<MemberPointerType>())
  return T->isMemberDataPointer();
else
  return false;
6530}

6532inline bool Type::isArrayType() const {
return isa<ArrayType>(CanonicalType);
6534}

6536inline bool Type::isConstantArrayType() const {
return isa<ConstantArrayType>(CanonicalType);
6538}

6540inline bool Type::isIncompleteArrayType() const {
return isa<IncompleteArrayType>(CanonicalType);
6542}

6544inline bool Type::isVariableArrayType() const {
return isa<VariableArrayType>(CanonicalType);
6546}

6548inline bool Type::isDependentSizedArrayType() const {
return isa<DependentSizedArrayType>(CanonicalType);
6550}

6552inline bool Type::isBuiltinType() const {
return isa<BuiltinType>(CanonicalType);
6554}

6556inline bool Type::isRecordType() const {
return isa<RecordType>(CanonicalType);
6558}

6560inline bool Type::isEnumeralType() const {
return isa<EnumType>(CanonicalType);
6562}

6564inline bool Type::isAnyComplexType() const {
return isa<ComplexType>(CanonicalType);
6566}

6568inline bool Type::isVectorType() const {
return isa<VectorType>(CanonicalType);
6570}

6572inline bool Type::isExtVectorType() const {
return isa<ExtVectorType>(CanonicalType);
6574}

6576inline bool Type::isDependentAddressSpaceType() const {
return isa<DependentAddressSpaceType>(CanonicalType);
6578}

6580inline bool Type::isObjCObjectPointerType() const {
return isa<ObjCObjectPointerType>(CanonicalType);
6582}

6584inline bool Type::isObjCObjectType() const {
return isa<ObjCObjectType>(CanonicalType);
6586}

6588inline bool Type::isObjCObjectOrInterfaceType() const {
return isa<ObjCInterfaceType>(CanonicalType) ||
  isa<ObjCObjectType>(CanonicalType);
6591}

6593inline bool Type::isAtomicType() const {
return isa<AtomicType>(CanonicalType);
6595}

6597inline bool Type::isUndeducedAutoType() const {
return isa<AutoType>(CanonicalType);
6599}

6601inline bool Type::isObjCQualifiedIdType() const {
if (const auto *OPT = getAs<ObjCObjectPointerType>())
  return OPT->isObjCQualifiedIdType();
return false;
6605}

6607inline bool Type::isObjCQualifiedClassType() const {
if (const auto *OPT = getAs<ObjCObjectPointerType>())
  return OPT->isObjCQualifiedClassType();
return false;
6611}

6613inline bool Type::isObjCIdType() const {
if (const auto *OPT = getAs<ObjCObjectPointerType>())
  return OPT->isObjCIdType();
return false;
6617}

6619inline bool Type::isObjCClassType() const {
if (const auto *OPT = getAs<ObjCObjectPointerType>())
  return OPT->isObjCClassType();
return false;
6623}

6625inline bool Type::isObjCSelType() const {
if (const auto *OPT = getAs<PointerType>())
  return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel);
return false;
6629}

6631inline bool Type::isObjCBuiltinType() const {
return isObjCIdType() || isObjCClassType() || isObjCSelType();
6633}

6635inline bool Type::isDecltypeType() const {
return isa<DecltypeType>(this);
6637}

6639#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
inline bool Type::is##Id##Type() const { \
  return isSpecificBuiltinType(BuiltinType::Id); \
}
6643#include "clang/Basic/OpenCLImageTypes.def"

6645inline bool Type::isSamplerT() const {
return isSpecificBuiltinType(BuiltinType::OCLSampler);
6647}

6649inline bool Type::isEventT() const {
return isSpecificBuiltinType(BuiltinType::OCLEvent);
6651}

6653inline bool Type::isClkEventT() const {
return isSpecificBuiltinType(BuiltinType::OCLClkEvent);
6655}

6657inline bool Type::isQueueT() const {
return isSpecificBuiltinType(BuiltinType::OCLQueue);
6659}

6661inline bool Type::isReserveIDT() const {
return isSpecificBuiltinType(BuiltinType::OCLReserveID);
6663}

6665inline bool Type::isImageType() const {
6666#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) is##Id##Type() ||
return
6668#include "clang/Basic/OpenCLImageTypes.def"
    false; // end boolean or operation
6670}

6672inline bool Type::isPipeType() const {
return isa<PipeType>(CanonicalType);
6674}

6676#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
inline bool Type::is##Id##Type() const { \
  return isSpecificBuiltinType(BuiltinType::Id); \
}
6680#include "clang/Basic/OpenCLExtensionTypes.def"

6682inline bool Type::isOCLIntelSubgroupAVCType() const {
6683#define INTEL_SUBGROUP_AVC_TYPE(ExtType, Id) \
isOCLIntelSubgroupAVC##Id##Type() ||
return
6686#include "clang/Basic/OpenCLExtensionTypes.def"
  false; // end of boolean or operation
6688}

6690inline bool Type::isOCLExtOpaqueType() const {
6691#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) is##Id##Type() ||
return
6693#include "clang/Basic/OpenCLExtensionTypes.def"
  false; // end of boolean or operation
6695}

6697inline bool Type::isOpenCLSpecificType() const {
return isSamplerT() || isEventT() || isImageType() || isClkEventT() ||
       isQueueT() || isReserveIDT() || isPipeType() || isOCLExtOpaqueType();
6700}

6702inline bool Type::isTemplateTypeParmType() const {
return isa<TemplateTypeParmType>(CanonicalType);
6704}

6706inline bool Type::isSpecificBuiltinType(unsigned K) const {
if (const BuiltinType *BT = getAs<BuiltinType>())
  if (BT->getKind() == (BuiltinType::Kind) K)
    return true;
return false;
6711}

6713inline bool Type::isPlaceholderType() const {
if (const auto *BT = dyn_cast<BuiltinType>(this))
  return BT->isPlaceholderType();
return false;
6717}

6719inline const BuiltinType *Type::getAsPlaceholderType() const {
if (const auto *BT = dyn_cast<BuiltinType>(this))
  if (BT->isPlaceholderType())
    return BT;
return nullptr;
6724}

6726inline bool Type::isSpecificPlaceholderType(unsigned K) const {
assert(BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K))((BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)) ?
 static_cast<void> (0) : __assert_fail ("BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)"
, "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 6727, __PRETTY_FUNCTION__));
if (const auto *BT = dyn_cast<BuiltinType>(this))
  return (BT->getKind() == (BuiltinType::Kind) K);
return false;
6731}

6733inline bool Type::isNonOverloadPlaceholderType() const {
if (const auto *BT = dyn_cast<BuiltinType>(this))
  return BT->isNonOverloadPlaceholderType();
return false;
6737}

6739inline bool Type::isVoidType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
  return BT->getKind() == BuiltinType::Void;
return false;
6743}

6745inline bool Type::isHalfType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
  return BT->getKind() == BuiltinType::Half;
// FIXME: Should we allow complex __fp16? Probably not.
return false;
6750}

6752inline bool Type::isFloat16Type() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
  return BT->getKind() == BuiltinType::Float16;
return false;
6756}

6758inline bool Type::isFloat128Type() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
  return BT->getKind() == BuiltinType::Float128;
return false;
6762}

6764inline bool Type::isNullPtrType() const {
if (const auto *BT = getAs<BuiltinType>())
  return BT->getKind() == BuiltinType::NullPtr;
return false;
6768}

6770bool IsEnumDeclComplete(EnumDecl *);
6771bool IsEnumDeclScoped(EnumDecl *);

6773inline bool Type::isIntegerType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
  return BT->getKind() >= BuiltinType::Bool &&
         BT->getKind() <= BuiltinType::Int128;
if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) {
  // Incomplete enum types are not treated as integer types.
  // FIXME: In C++, enum types are never integer types.
  return IsEnumDeclComplete(ET->getDecl()) &&
    !IsEnumDeclScoped(ET->getDecl());
}
return false;
6784}

6786inline bool Type::isFixedPointType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) {
  return BT->getKind() >= BuiltinType::ShortAccum &&
         BT->getKind() <= BuiltinType::SatULongFract;
}
return false;
6792}

6794inline bool Type::isFixedPointOrIntegerType() const {
return isFixedPointType() || isIntegerType();
6796}

6798inline bool Type::isSaturatedFixedPointType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) {
  return BT->getKind() >= BuiltinType::SatShortAccum &&
         BT->getKind() <= BuiltinType::SatULongFract;
}
return false;
6804}

6806inline bool Type::isUnsaturatedFixedPointType() const {
return isFixedPointType() && !isSaturatedFixedPointType();
6808}

6810inline bool Type::isSignedFixedPointType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) {
  return ((BT->getKind() >= BuiltinType::ShortAccum &&
           BT->getKind() <= BuiltinType::LongAccum) ||
          (BT->getKind() >= BuiltinType::ShortFract &&
           BT->getKind() <= BuiltinType::LongFract) ||
          (BT->getKind() >= BuiltinType::SatShortAccum &&
           BT->getKind() <= BuiltinType::SatLongAccum) ||
          (BT->getKind() >= BuiltinType::SatShortFract &&
           BT->getKind() <= BuiltinType::SatLongFract));
}
return false;
6822}

6824inline bool Type::isUnsignedFixedPointType() const {
return isFixedPointType() && !isSignedFixedPointType();
6826}

6828inline bool Type::isScalarType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
  return BT->getKind() > BuiltinType::Void &&
         BT->getKind() <= BuiltinType::NullPtr;
if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType))
  // Enums are scalar types, but only if they are defined.  Incomplete enums
  // are not treated as scalar types.
  return IsEnumDeclComplete(ET->getDecl());
return isa<PointerType>(CanonicalType) ||
       isa<BlockPointerType>(CanonicalType) ||
       isa<MemberPointerType>(CanonicalType) ||
       isa<ComplexType>(CanonicalType) ||
       isa<ObjCObjectPointerType>(CanonicalType);
6841}

6843inline bool Type::isIntegralOrEnumerationType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
  return BT->getKind() >= BuiltinType::Bool &&
         BT->getKind() <= BuiltinType::Int128;

// Check for a complete enum type; incomplete enum types are not properly an
// enumeration type in the sense required here.
if (const auto *ET = dyn_cast<EnumType>(CanonicalType))
  return IsEnumDeclComplete(ET->getDecl());

return false;
6854}

6856inline bool Type::isBooleanType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
  return BT->getKind() == BuiltinType::Bool;
return false;
6860}

6862inline bool Type::isUndeducedType() const {
auto *DT = getContainedDeducedType();
return DT && !DT->isDeduced();
6865}

6867/// Determines whether this is a type for which one can define
6868/// an overloaded operator.
6869inline bool Type::isOverloadableType() const {
return isDependentType() || isRecordType() || isEnumeralType();
6871}

6873/// Determines whether this type can decay to a pointer type.
6874inline bool Type::canDecayToPointerType() const {
return isFunctionType() || isArrayType();
6876}

6878inline bool Type::hasPointerRepresentation() const {
return (isPointerType() || isReferenceType() || isBlockPointerType() ||
        isObjCObjectPointerType() || isNullPtrType());
6881}

6883inline bool Type::hasObjCPointerRepresentation() const {
return isObjCObjectPointerType();
6885}

6887inline const Type *Type::getBaseElementTypeUnsafe() const {
const Type *type = this;
while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe())
  type = arrayType->getElementType().getTypePtr();
return type;
6892}

6894inline const Type *Type::getPointeeOrArrayElementType() const {
const Type *type = this;
if (type->isAnyPointerType())
  return type->getPointeeType().getTypePtr();
else if (type->isArrayType())
  return type->getBaseElementTypeUnsafe();
return type;
6901}
6902/// Insertion operator for diagnostics. This allows sending address spaces into
6903/// a diagnostic with <<.
6904inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB,
                                         LangAS AS) {
DB.AddTaggedVal(static_cast<std::underlying_type_t<LangAS>>(AS),
                DiagnosticsEngine::ArgumentKind::ak_addrspace);
return DB;
6909}

6911/// Insertion operator for partial diagnostics. This allows sending adress
6912/// spaces into a diagnostic with <<.
6913inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD,
                                         LangAS AS) {
PD.AddTaggedVal(static_cast<std::underlying_type_t<LangAS>>(AS),
                DiagnosticsEngine::ArgumentKind::ak_addrspace);
return PD;
6918}

6920/// Insertion operator for diagnostics. This allows sending Qualifiers into a
6921/// diagnostic with <<.
6922inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB,
                                         Qualifiers Q) {
DB.AddTaggedVal(Q.getAsOpaqueValue(),
                DiagnosticsEngine::ArgumentKind::ak_qual);
return DB;
6927}

6929/// Insertion operator for partial diagnostics. This allows sending Qualifiers
6930/// into a diagnostic with <<.
6931inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD,
                                         Qualifiers Q) {
PD.AddTaggedVal(Q.getAsOpaqueValue(),
                DiagnosticsEngine::ArgumentKind::ak_qual);
return PD;
6936}

6938/// Insertion operator for diagnostics.  This allows sending QualType's into a
6939/// diagnostic with <<.
6940inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB,
                                         QualType T) {
DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()),
                DiagnosticsEngine::ak_qualtype);
return DB;
6945}

6947/// Insertion operator for partial diagnostics.  This allows sending QualType's
6948/// into a diagnostic with <<.
6949inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD,
                                         QualType T) {
PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()),
                DiagnosticsEngine::ak_qualtype);
return PD;
6954}

6956// Helper class template that is used by Type::getAs to ensure that one does
6957// not try to look through a qualified type to get to an array type.
6958template <typename T>
6959using TypeIsArrayType =
  std::integral_constant<bool, std::is_same<T, ArrayType>::value ||
                                   std::is_base_of<ArrayType, T>::value>;

6963// Member-template getAs<specific type>'.
6964template <typename T> const T *Type::getAs() const {
static_assert(!TypeIsArrayType<T>::value,
              "ArrayType cannot be used with getAs!");

// If this is directly a T type, return it.
if (const auto *Ty = dyn_cast<T>(this))
  return Ty;

// If the canonical form of this type isn't the right kind, reject it.
if (!isa<T>(CanonicalType))
  return nullptr;

// If this is a typedef for the type, strip the typedef off without
// losing all typedef information.
return cast<T>(getUnqualifiedDesugaredType());
6979}

6981template <typename T> const T *Type::getAsAdjusted() const {
static_assert(!TypeIsArrayType<T>::value, "ArrayType cannot be used with getAsAdjusted!");

// If this is directly a T type, return it.
if (const auto *Ty = dyn_cast<T>(this))
  return Ty;

// If the canonical form of this type isn't the right kind, reject it.
if (!isa<T>(CanonicalType))
  return nullptr;

// Strip off type adjustments that do not modify the underlying nature of the
// type.
const Type *Ty = this;
while (Ty) {
  if (const auto *A = dyn_cast<AttributedType>(Ty))
    Ty = A->getModifiedType().getTypePtr();
  else if (const auto *E = dyn_cast<ElaboratedType>(Ty))
    Ty = E->desugar().getTypePtr();
  else if (const auto *P = dyn_cast<ParenType>(Ty))
    Ty = P->desugar().getTypePtr();
  else if (const auto *A = dyn_cast<AdjustedType>(Ty))
    Ty = A->desugar().getTypePtr();
  else if (const auto *M = dyn_cast<MacroQualifiedType>(Ty))
    Ty = M->desugar().getTypePtr();
  else
    break;
}

// Just because the canonical type is correct does not mean we can use cast<>,
// since we may not have stripped off all the sugar down to the base type.
return dyn_cast<T>(Ty);
7013}

7015inline const ArrayType *Type::getAsArrayTypeUnsafe() const {
// If this is directly an array type, return it.
if (const auto *arr = dyn_cast<ArrayType>(this))
  return arr;

// If the canonical form of this type isn't the right kind, reject it.
if (!isa<ArrayType>(CanonicalType))
  return nullptr;

// If this is a typedef for the type, strip the typedef off without
// losing all typedef information.
return cast<ArrayType>(getUnqualifiedDesugaredType());
7027}

7029template <typename T> const T *Type::castAs() const {
static_assert(!TypeIsArrayType<T>::value,
              "ArrayType cannot be used with castAs!");

if (const auto *ty = dyn_cast<T>(this)) return ty;
assert(isa<T>(CanonicalType))((isa<T>(CanonicalType)) ? static_cast<void> (0) :
 __assert_fail ("isa<T>(CanonicalType)", "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 7034, __PRETTY_FUNCTION__));
return cast<T>(getUnqualifiedDesugaredType());
7036}

7038inline const ArrayType *Type::castAsArrayTypeUnsafe() const {
assert(isa<ArrayType>(CanonicalType))((isa<ArrayType>(CanonicalType)) ? static_cast<void>
 (0) : __assert_fail ("isa<ArrayType>(CanonicalType)", "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 7039, __PRETTY_FUNCTION__));
if (const auto *arr = dyn_cast<ArrayType>(this)) return arr;
return cast<ArrayType>(getUnqualifiedDesugaredType());
7042}

7044DecayedType::DecayedType(QualType OriginalType, QualType DecayedPtr,
                       QualType CanonicalPtr)
  : AdjustedType(Decayed, OriginalType, DecayedPtr, CanonicalPtr) {
7047#ifndef NDEBUG
QualType Adjusted = getAdjustedType();
(void)AttributedType::stripOuterNullability(Adjusted);
assert(isa<PointerType>(Adjusted))((isa<PointerType>(Adjusted)) ? static_cast<void>
 (0) : __assert_fail ("isa<PointerType>(Adjusted)", "/build/llvm-toolchain-snapshot-10~++20200110111110+a1cc19b5814/clang/include/clang/AST/Type.h"
, 7050, __PRETTY_FUNCTION__));
7051#endif
7052}

7054QualType DecayedType::getPointeeType() const {
QualType Decayed = getDecayedType();
(void)AttributedType::stripOuterNullability(Decayed);
return cast<PointerType>(Decayed)->getPointeeType();
7058}

7060// Get the decimal string representation of a fixed point type, represented
7061// as a scaled integer.
7062// TODO: At some point, we should change the arguments to instead just accept an
7063// APFixedPoint instead of APSInt and scale.
7064void FixedPointValueToString(SmallVectorImpl<char> &Str, llvm::APSInt Val,
                           unsigned Scale);

7067} // namespace clang

7069#endif // LLVM_CLANG_AST_TYPE_H