/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp

Bug Summary

File:	tools/clang/lib/CodeGen/CGDecl.cpp
Warning:	line 2398, column 9 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 CGDecl.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mthread-model posix -mframe-pointer=none -relaxed-aliasing -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-10/lib/clang/10.0.0 -D CLANG_VENDOR="Debian " -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-10~svn373517/build-llvm/tools/clang/lib/CodeGen -I /build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen -I /build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include -I /build/llvm-toolchain-snapshot-10~svn373517/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-10~svn373517/build-llvm/include -I /build/llvm-toolchain-snapshot-10~svn373517/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~svn373517/build-llvm/tools/clang/lib/CodeGen -fdebug-prefix-map=/build/llvm-toolchain-snapshot-10~svn373517=. -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -stack-protector 2 -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -o /tmp/scan-build-2019-10-02-234743-9763-1 -x c++ /build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp

/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp

→

1//===--- CGDecl.cpp - Emit LLVM Code for declarations ---------------------===//
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 to emit Decl nodes as LLVM code.
10//
11//===----------------------------------------------------------------------===//

13#include "CGBlocks.h"
14#include "CGCXXABI.h"
15#include "CGCleanup.h"
16#include "CGDebugInfo.h"
17#include "CGOpenCLRuntime.h"
18#include "CGOpenMPRuntime.h"
19#include "CodeGenFunction.h"
20#include "CodeGenModule.h"
21#include "ConstantEmitter.h"
22#include "PatternInit.h"
23#include "TargetInfo.h"
24#include "clang/AST/ASTContext.h"
25#include "clang/AST/CharUnits.h"
26#include "clang/AST/Decl.h"
27#include "clang/AST/DeclObjC.h"
28#include "clang/AST/DeclOpenMP.h"
29#include "clang/Basic/CodeGenOptions.h"
30#include "clang/Basic/SourceManager.h"
31#include "clang/Basic/TargetInfo.h"
32#include "clang/CodeGen/CGFunctionInfo.h"
33#include "llvm/Analysis/ValueTracking.h"
34#include "llvm/IR/DataLayout.h"
35#include "llvm/IR/GlobalVariable.h"
36#include "llvm/IR/Intrinsics.h"
37#include "llvm/IR/Type.h"

39using namespace clang;
40using namespace CodeGen;

42void CodeGenFunction::EmitDecl(const Decl &D) {
switch (D.getKind()) {
case Decl::BuiltinTemplate:
case Decl::TranslationUnit:
case Decl::ExternCContext:
case Decl::Namespace:
case Decl::UnresolvedUsingTypename:
case Decl::ClassTemplateSpecialization:
case Decl::ClassTemplatePartialSpecialization:
case Decl::VarTemplateSpecialization:
case Decl::VarTemplatePartialSpecialization:
case Decl::TemplateTypeParm:
case Decl::UnresolvedUsingValue:
case Decl::NonTypeTemplateParm:
case Decl::CXXDeductionGuide:
case Decl::CXXMethod:
case Decl::CXXConstructor:
case Decl::CXXDestructor:
case Decl::CXXConversion:
case Decl::Field:
case Decl::MSProperty:
case Decl::IndirectField:
case Decl::ObjCIvar:
case Decl::ObjCAtDefsField:
case Decl::ParmVar:
case Decl::ImplicitParam:
case Decl::ClassTemplate:
case Decl::VarTemplate:
case Decl::FunctionTemplate:
case Decl::TypeAliasTemplate:
case Decl::TemplateTemplateParm:
case Decl::ObjCMethod:
case Decl::ObjCCategory:
case Decl::ObjCProtocol:
case Decl::ObjCInterface:
case Decl::ObjCCategoryImpl:
case Decl::ObjCImplementation:
case Decl::ObjCProperty:
case Decl::ObjCCompatibleAlias:
case Decl::PragmaComment:
case Decl::PragmaDetectMismatch:
case Decl::AccessSpec:
case Decl::LinkageSpec:
case Decl::Export:
case Decl::ObjCPropertyImpl:
case Decl::FileScopeAsm:
case Decl::Friend:
case Decl::FriendTemplate:
case Decl::Block:
case Decl::Captured:
case Decl::ClassScopeFunctionSpecialization:
case Decl::UsingShadow:
case Decl::ConstructorUsingShadow:
case Decl::ObjCTypeParam:
case Decl::Binding:
  llvm_unreachable("Declaration should not be in declstmts!")::llvm::llvm_unreachable_internal("Declaration should not be in declstmts!"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 97);
case Decl::Function:  // void X();
case Decl::Record:    // struct/union/class X;
case Decl::Enum:      // enum X;
case Decl::EnumConstant: // enum ? { X = ? }
case Decl::CXXRecord: // struct/union/class X; [C++]
case Decl::StaticAssert: // static_assert(X, ""); [C++0x]
case Decl::Label:        // __label__ x;
case Decl::Import:
case Decl::OMPThreadPrivate:
case Decl::OMPAllocate:
case Decl::OMPCapturedExpr:
case Decl::OMPRequires:
case Decl::Empty:
case Decl::Concept:
  // None of these decls require codegen support.
  return;

case Decl::NamespaceAlias:
  if (CGDebugInfo *DI = getDebugInfo())
      DI->EmitNamespaceAlias(cast<NamespaceAliasDecl>(D));
  return;
case Decl::Using:          // using X; [C++]
  if (CGDebugInfo *DI = getDebugInfo())
      DI->EmitUsingDecl(cast<UsingDecl>(D));
  return;
case Decl::UsingPack:
  for (auto *Using : cast<UsingPackDecl>(D).expansions())
    EmitDecl(*Using);
  return;
case Decl::UsingDirective: // using namespace X; [C++]
  if (CGDebugInfo *DI = getDebugInfo())
    DI->EmitUsingDirective(cast<UsingDirectiveDecl>(D));
  return;
case Decl::Var:
case Decl::Decomposition: {
  const VarDecl &VD = cast<VarDecl>(D);
  assert(VD.isLocalVarDecl() &&((VD.isLocalVarDecl() && "Should not see file-scope variables inside a function!"
) ? static_cast<void> (0) : __assert_fail ("VD.isLocalVarDecl() && \"Should not see file-scope variables inside a function!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 135, __PRETTY_FUNCTION__))
         "Should not see file-scope variables inside a function!")((VD.isLocalVarDecl() && "Should not see file-scope variables inside a function!"
) ? static_cast<void> (0) : __assert_fail ("VD.isLocalVarDecl() && \"Should not see file-scope variables inside a function!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 135, __PRETTY_FUNCTION__));
  EmitVarDecl(VD);
  if (auto *DD = dyn_cast<DecompositionDecl>(&VD))
    for (auto *B : DD->bindings())
      if (auto *HD = B->getHoldingVar())
        EmitVarDecl(*HD);
  return;
}

case Decl::OMPDeclareReduction:
  return CGM.EmitOMPDeclareReduction(cast<OMPDeclareReductionDecl>(&D), this);

case Decl::OMPDeclareMapper:
  return CGM.EmitOMPDeclareMapper(cast<OMPDeclareMapperDecl>(&D), this);

case Decl::Typedef:      // typedef int X;
case Decl::TypeAlias: {  // using X = int; [C++0x]
  const TypedefNameDecl &TD = cast<TypedefNameDecl>(D);
  QualType Ty = TD.getUnderlyingType();

  if (Ty->isVariablyModifiedType())
    EmitVariablyModifiedType(Ty);

  return;
}
}
161}

163/// EmitVarDecl - This method handles emission of any variable declaration
164/// inside a function, including static vars etc.
165void CodeGenFunction::EmitVarDecl(const VarDecl &D) {
if (D.hasExternalStorage())
  // Don't emit it now, allow it to be emitted lazily on its first use.
  return;

// Some function-scope variable does not have static storage but still
// needs to be emitted like a static variable, e.g. a function-scope
// variable in constant address space in OpenCL.
if (D.getStorageDuration() != SD_Automatic) {
  // Static sampler variables translated to function calls.
  if (D.getType()->isSamplerT())
    return;

  llvm::GlobalValue::LinkageTypes Linkage =
      CGM.getLLVMLinkageVarDefinition(&D, /*IsConstant=*/false);

  // FIXME: We need to force the emission/use of a guard variable for
  // some variables even if we can constant-evaluate them because
  // we can't guarantee every translation unit will constant-evaluate them.

  return EmitStaticVarDecl(D, Linkage);
}

if (D.getType().getAddressSpace() == LangAS::opencl_local)
  return CGM.getOpenCLRuntime().EmitWorkGroupLocalVarDecl(*this, D);

assert(D.hasLocalStorage())((D.hasLocalStorage()) ? static_cast<void> (0) : __assert_fail
 ("D.hasLocalStorage()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 191, __PRETTY_FUNCTION__));
return EmitAutoVarDecl(D);
193}

195static std::string getStaticDeclName(CodeGenModule &CGM, const VarDecl &D) {
if (CGM.getLangOpts().CPlusPlus)
  return CGM.getMangledName(&D).str();

// If this isn't C++, we don't need a mangled name, just a pretty one.
assert(!D.isExternallyVisible() && "name shouldn't matter")((!D.isExternallyVisible() && "name shouldn't matter"
) ? static_cast<void> (0) : __assert_fail ("!D.isExternallyVisible() && \"name shouldn't matter\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 200, __PRETTY_FUNCTION__));
std::string ContextName;
const DeclContext *DC = D.getDeclContext();
if (auto *CD = dyn_cast<CapturedDecl>(DC))
  DC = cast<DeclContext>(CD->getNonClosureContext());
if (const auto *FD = dyn_cast<FunctionDecl>(DC))
  ContextName = CGM.getMangledName(FD);
else if (const auto *BD = dyn_cast<BlockDecl>(DC))
  ContextName = CGM.getBlockMangledName(GlobalDecl(), BD);
else if (const auto *OMD = dyn_cast<ObjCMethodDecl>(DC))
  ContextName = OMD->getSelector().getAsString();
else
  llvm_unreachable("Unknown context for static var decl")::llvm::llvm_unreachable_internal("Unknown context for static var decl"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 212);

ContextName += "." + D.getNameAsString();
return ContextName;
216}

218llvm::Constant *CodeGenModule::getOrCreateStaticVarDecl(
  const VarDecl &D, llvm::GlobalValue::LinkageTypes Linkage) {
// In general, we don't always emit static var decls once before we reference
// them. It is possible to reference them before emitting the function that
// contains them, and it is possible to emit the containing function multiple
// times.
if (llvm::Constant *ExistingGV = StaticLocalDeclMap[&D])
  return ExistingGV;

QualType Ty = D.getType();
assert(Ty->isConstantSizeType() && "VLAs can't be static")((Ty->isConstantSizeType() && "VLAs can't be static"
) ? static_cast<void> (0) : __assert_fail ("Ty->isConstantSizeType() && \"VLAs can't be static\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 228, __PRETTY_FUNCTION__));

// Use the label if the variable is renamed with the asm-label extension.
std::string Name;
if (D.hasAttr<AsmLabelAttr>())
  Name = getMangledName(&D);
else
  Name = getStaticDeclName(*this, D);

llvm::Type *LTy = getTypes().ConvertTypeForMem(Ty);
LangAS AS = GetGlobalVarAddressSpace(&D);
unsigned TargetAS = getContext().getTargetAddressSpace(AS);

// OpenCL variables in local address space and CUDA shared
// variables cannot have an initializer.
llvm::Constant *Init = nullptr;
if (Ty.getAddressSpace() == LangAS::opencl_local ||
    D.hasAttr<CUDASharedAttr>())
  Init = llvm::UndefValue::get(LTy);
else
  Init = EmitNullConstant(Ty);

llvm::GlobalVariable *GV = new llvm::GlobalVariable(
    getModule(), LTy, Ty.isConstant(getContext()), Linkage, Init, Name,
    nullptr, llvm::GlobalVariable::NotThreadLocal, TargetAS);
GV->setAlignment(getContext().getDeclAlign(&D).getQuantity());

if (supportsCOMDAT() && GV->isWeakForLinker())
  GV->setComdat(TheModule.getOrInsertComdat(GV->getName()));

if (D.getTLSKind())
  setTLSMode(GV, D);

setGVProperties(GV, &D);

// Make sure the result is of the correct type.
LangAS ExpectedAS = Ty.getAddressSpace();
llvm::Constant *Addr = GV;
if (AS != ExpectedAS) {
  Addr = getTargetCodeGenInfo().performAddrSpaceCast(
      *this, GV, AS, ExpectedAS,
      LTy->getPointerTo(getContext().getTargetAddressSpace(ExpectedAS)));
}

setStaticLocalDeclAddress(&D, Addr);

// Ensure that the static local gets initialized by making sure the parent
// function gets emitted eventually.
const Decl *DC = cast<Decl>(D.getDeclContext());

// We can't name blocks or captured statements directly, so try to emit their
// parents.
if (isa<BlockDecl>(DC) || isa<CapturedDecl>(DC)) {
  DC = DC->getNonClosureContext();
  // FIXME: Ensure that global blocks get emitted.
  if (!DC)
    return Addr;
}

GlobalDecl GD;
if (const auto *CD = dyn_cast<CXXConstructorDecl>(DC))
  GD = GlobalDecl(CD, Ctor_Base);
else if (const auto *DD = dyn_cast<CXXDestructorDecl>(DC))
  GD = GlobalDecl(DD, Dtor_Base);
else if (const auto *FD = dyn_cast<FunctionDecl>(DC))
  GD = GlobalDecl(FD);
else {
  // Don't do anything for Obj-C method decls or global closures. We should
  // never defer them.
  assert(isa<ObjCMethodDecl>(DC) && "unexpected parent code decl")((isa<ObjCMethodDecl>(DC) && "unexpected parent code decl"
) ? static_cast<void> (0) : __assert_fail ("isa<ObjCMethodDecl>(DC) && \"unexpected parent code decl\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 297, __PRETTY_FUNCTION__));
}
if (GD.getDecl()) {
  // Disable emission of the parent function for the OpenMP device codegen.
  CGOpenMPRuntime::DisableAutoDeclareTargetRAII NoDeclTarget(*this);
  (void)GetAddrOfGlobal(GD);
}

return Addr;
306}

308/// AddInitializerToStaticVarDecl - Add the initializer for 'D' to the
309/// global variable that has already been created for it.  If the initializer
310/// has a different type than GV does, this may free GV and return a different
311/// one.  Otherwise it just returns GV.
312llvm::GlobalVariable *
313CodeGenFunction::AddInitializerToStaticVarDecl(const VarDecl &D,
                                             llvm::GlobalVariable *GV) {
ConstantEmitter emitter(*this);
llvm::Constant *Init = emitter.tryEmitForInitializer(D);

// If constant emission failed, then this should be a C++ static
// initializer.
if (!Init) {
  if (!getLangOpts().CPlusPlus)
    CGM.ErrorUnsupported(D.getInit(), "constant l-value expression");
  else if (HaveInsertPoint()) {
    // Since we have a static initializer, this global variable can't
    // be constant.
    GV->setConstant(false);

    EmitCXXGuardedInit(D, GV, /*PerformInit*/true);
  }
  return GV;
}

// The initializer may differ in type from the global. Rewrite
// the global to match the initializer.  (We have to do this
// because some types, like unions, can't be completely represented
// in the LLVM type system.)
if (GV->getType()->getElementType() != Init->getType()) {
  llvm::GlobalVariable *OldGV = GV;

  GV = new llvm::GlobalVariable(CGM.getModule(), Init->getType(),
                                OldGV->isConstant(),
                                OldGV->getLinkage(), Init, "",
                                /*InsertBefore*/ OldGV,
                                OldGV->getThreadLocalMode(),
                         CGM.getContext().getTargetAddressSpace(D.getType()));
  GV->setVisibility(OldGV->getVisibility());
  GV->setDSOLocal(OldGV->isDSOLocal());
  GV->setComdat(OldGV->getComdat());

  // Steal the name of the old global
  GV->takeName(OldGV);

  // Replace all uses of the old global with the new global
  llvm::Constant *NewPtrForOldDecl =
  llvm::ConstantExpr::getBitCast(GV, OldGV->getType());
  OldGV->replaceAllUsesWith(NewPtrForOldDecl);

  // Erase the old global, since it is no longer used.
  OldGV->eraseFromParent();
}

GV->setConstant(CGM.isTypeConstant(D.getType(), true));
GV->setInitializer(Init);

emitter.finalize(GV);

if (D.needsDestruction(getContext()) && HaveInsertPoint()) {
  // We have a constant initializer, but a nontrivial destructor. We still
  // need to perform a guarded "initialization" in order to register the
  // destructor.
  EmitCXXGuardedInit(D, GV, /*PerformInit*/false);
}

return GV;
375}

377void CodeGenFunction::EmitStaticVarDecl(const VarDecl &D,
                                    llvm::GlobalValue::LinkageTypes Linkage) {
// Check to see if we already have a global variable for this
// declaration.  This can happen when double-emitting function
// bodies, e.g. with complete and base constructors.
llvm::Constant *addr = CGM.getOrCreateStaticVarDecl(D, Linkage);
CharUnits alignment = getContext().getDeclAlign(&D);

// Store into LocalDeclMap before generating initializer to handle
// circular references.
setAddrOfLocalVar(&D, Address(addr, alignment));

// We can't have a VLA here, but we can have a pointer to a VLA,
// even though that doesn't really make any sense.
// Make sure to evaluate VLA bounds now so that we have them for later.
if (D.getType()->isVariablyModifiedType())
  EmitVariablyModifiedType(D.getType());

// Save the type in case adding the initializer forces a type change.
llvm::Type *expectedType = addr->getType();

llvm::GlobalVariable *var =
  cast<llvm::GlobalVariable>(addr->stripPointerCasts());

// CUDA's local and local static __shared__ variables should not
// have any non-empty initializers. This is ensured by Sema.
// Whatever initializer such variable may have when it gets here is
// a no-op and should not be emitted.
bool isCudaSharedVar = getLangOpts().CUDA && getLangOpts().CUDAIsDevice &&
                       D.hasAttr<CUDASharedAttr>();
// If this value has an initializer, emit it.
if (D.getInit() && !isCudaSharedVar)
  var = AddInitializerToStaticVarDecl(D, var);

var->setAlignment(alignment.getQuantity());

if (D.hasAttr<AnnotateAttr>())
  CGM.AddGlobalAnnotations(&D, var);

if (auto *SA = D.getAttr<PragmaClangBSSSectionAttr>())
  var->addAttribute("bss-section", SA->getName());
if (auto *SA = D.getAttr<PragmaClangDataSectionAttr>())
  var->addAttribute("data-section", SA->getName());
if (auto *SA = D.getAttr<PragmaClangRodataSectionAttr>())
  var->addAttribute("rodata-section", SA->getName());

if (const SectionAttr *SA = D.getAttr<SectionAttr>())
  var->setSection(SA->getName());

if (D.hasAttr<UsedAttr>())
  CGM.addUsedGlobal(var);

// We may have to cast the constant because of the initializer
// mismatch above.
//
// FIXME: It is really dangerous to store this in the map; if anyone
// RAUW's the GV uses of this constant will be invalid.
llvm::Constant *castedAddr =
  llvm::ConstantExpr::getPointerBitCastOrAddrSpaceCast(var, expectedType);
if (var != castedAddr)
  LocalDeclMap.find(&D)->second = Address(castedAddr, alignment);
CGM.setStaticLocalDeclAddress(&D, castedAddr);

CGM.getSanitizerMetadata()->reportGlobalToASan(var, D);

// Emit global variable debug descriptor for static vars.
CGDebugInfo *DI = getDebugInfo();
if (DI &&
    CGM.getCodeGenOpts().getDebugInfo() >= codegenoptions::LimitedDebugInfo) {
  DI->setLocation(D.getLocation());
  DI->EmitGlobalVariable(var, &D);
}
449}

451namespace {
struct DestroyObject final : EHScopeStack::Cleanup {
  DestroyObject(Address addr, QualType type,
                CodeGenFunction::Destroyer *destroyer,
                bool useEHCleanupForArray)
    : addr(addr), type(type), destroyer(destroyer),
      useEHCleanupForArray(useEHCleanupForArray) {}

  Address addr;
  QualType type;
  CodeGenFunction::Destroyer *destroyer;
  bool useEHCleanupForArray;

  void Emit(CodeGenFunction &CGF, Flags flags) override {
    // Don't use an EH cleanup recursively from an EH cleanup.
    bool useEHCleanupForArray =
      flags.isForNormalCleanup() && this->useEHCleanupForArray;

    CGF.emitDestroy(addr, type, destroyer, useEHCleanupForArray);
  }
};

template <class Derived>
struct DestroyNRVOVariable : EHScopeStack::Cleanup {
  DestroyNRVOVariable(Address addr, QualType type, llvm::Value *NRVOFlag)
      : NRVOFlag(NRVOFlag), Loc(addr), Ty(type) {}

  llvm::Value *NRVOFlag;
  Address Loc;
  QualType Ty;

  void Emit(CodeGenFunction &CGF, Flags flags) override {
    // Along the exceptions path we always execute the dtor.
    bool NRVO = flags.isForNormalCleanup() && NRVOFlag;

    llvm::BasicBlock *SkipDtorBB = nullptr;
    if (NRVO) {
      // If we exited via NRVO, we skip the destructor call.
      llvm::BasicBlock *RunDtorBB = CGF.createBasicBlock("nrvo.unused");
      SkipDtorBB = CGF.createBasicBlock("nrvo.skipdtor");
      llvm::Value *DidNRVO =
        CGF.Builder.CreateFlagLoad(NRVOFlag, "nrvo.val");
      CGF.Builder.CreateCondBr(DidNRVO, SkipDtorBB, RunDtorBB);
      CGF.EmitBlock(RunDtorBB);
    }

    static_cast<Derived *>(this)->emitDestructorCall(CGF);

    if (NRVO) CGF.EmitBlock(SkipDtorBB);
  }

  virtual ~DestroyNRVOVariable() = default;
};

struct DestroyNRVOVariableCXX final
    : DestroyNRVOVariable<DestroyNRVOVariableCXX> {
  DestroyNRVOVariableCXX(Address addr, QualType type,
                         const CXXDestructorDecl *Dtor, llvm::Value *NRVOFlag)
      : DestroyNRVOVariable<DestroyNRVOVariableCXX>(addr, type, NRVOFlag),
        Dtor(Dtor) {}

  const CXXDestructorDecl *Dtor;

  void emitDestructorCall(CodeGenFunction &CGF) {
    CGF.EmitCXXDestructorCall(Dtor, Dtor_Complete,
                              /*ForVirtualBase=*/false,
                              /*Delegating=*/false, Loc, Ty);
  }
};

struct DestroyNRVOVariableC final
    : DestroyNRVOVariable<DestroyNRVOVariableC> {
  DestroyNRVOVariableC(Address addr, llvm::Value *NRVOFlag, QualType Ty)
      : DestroyNRVOVariable<DestroyNRVOVariableC>(addr, Ty, NRVOFlag) {}

  void emitDestructorCall(CodeGenFunction &CGF) {
    CGF.destroyNonTrivialCStruct(CGF, Loc, Ty);
  }
};

struct CallStackRestore final : EHScopeStack::Cleanup {
  Address Stack;
  CallStackRestore(Address Stack) : Stack(Stack) {}
  void Emit(CodeGenFunction &CGF, Flags flags) override {
    llvm::Value *V = CGF.Builder.CreateLoad(Stack);
    llvm::Function *F = CGF.CGM.getIntrinsic(llvm::Intrinsic::stackrestore);
    CGF.Builder.CreateCall(F, V);
  }
};

struct ExtendGCLifetime final : EHScopeStack::Cleanup {
  const VarDecl &Var;
  ExtendGCLifetime(const VarDecl *var) : Var(*var) {}

  void Emit(CodeGenFunction &CGF, Flags flags) override {
    // Compute the address of the local variable, in case it's a
    // byref or something.
    DeclRefExpr DRE(CGF.getContext(), const_cast<VarDecl *>(&Var), false,
                    Var.getType(), VK_LValue, SourceLocation());
    llvm::Value *value = CGF.EmitLoadOfScalar(CGF.EmitDeclRefLValue(&DRE),
                                              SourceLocation());
    CGF.EmitExtendGCLifetime(value);
  }
};

struct CallCleanupFunction final : EHScopeStack::Cleanup {
  llvm::Constant *CleanupFn;
  const CGFunctionInfo &FnInfo;
  const VarDecl &Var;

  CallCleanupFunction(llvm::Constant *CleanupFn, const CGFunctionInfo *Info,
                      const VarDecl *Var)
    : CleanupFn(CleanupFn), FnInfo(*Info), Var(*Var) {}

  void Emit(CodeGenFunction &CGF, Flags flags) override {
    DeclRefExpr DRE(CGF.getContext(), const_cast<VarDecl *>(&Var), false,
                    Var.getType(), VK_LValue, SourceLocation());
    // Compute the address of the local variable, in case it's a byref
    // or something.
    llvm::Value *Addr = CGF.EmitDeclRefLValue(&DRE).getPointer();

    // In some cases, the type of the function argument will be different from
    // the type of the pointer. An example of this is
    // void f(void* arg);
    // __attribute__((cleanup(f))) void *g;
    //
    // To fix this we insert a bitcast here.
    QualType ArgTy = FnInfo.arg_begin()->type;
    llvm::Value *Arg =
      CGF.Builder.CreateBitCast(Addr, CGF.ConvertType(ArgTy));

    CallArgList Args;
    Args.add(RValue::get(Arg),
             CGF.getContext().getPointerType(Var.getType()));
    auto Callee = CGCallee::forDirect(CleanupFn);
    CGF.EmitCall(FnInfo, Callee, ReturnValueSlot(), Args);
  }
};
589} // end anonymous namespace

591/// EmitAutoVarWithLifetime - Does the setup required for an automatic
592/// variable with lifetime.
593static void EmitAutoVarWithLifetime(CodeGenFunction &CGF, const VarDecl &var,
                                  Address addr,
                                  Qualifiers::ObjCLifetime lifetime) {
switch (lifetime) {
case Qualifiers::OCL_None:
  llvm_unreachable("present but none")::llvm::llvm_unreachable_internal("present but none", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 598);

case Qualifiers::OCL_ExplicitNone:
  // nothing to do
  break;

case Qualifiers::OCL_Strong: {
  CodeGenFunction::Destroyer *destroyer =
    (var.hasAttr<ObjCPreciseLifetimeAttr>()
     ? CodeGenFunction::destroyARCStrongPrecise
     : CodeGenFunction::destroyARCStrongImprecise);

  CleanupKind cleanupKind = CGF.getARCCleanupKind();
  CGF.pushDestroy(cleanupKind, addr, var.getType(), destroyer,
                  cleanupKind & EHCleanup);
  break;
}
case Qualifiers::OCL_Autoreleasing:
  // nothing to do
  break;

case Qualifiers::OCL_Weak:
  // __weak objects always get EH cleanups; otherwise, exceptions
  // could cause really nasty crashes instead of mere leaks.
  CGF.pushDestroy(NormalAndEHCleanup, addr, var.getType(),
                  CodeGenFunction::destroyARCWeak,
                  /*useEHCleanup*/ true);
  break;
}
627}

629static bool isAccessedBy(const VarDecl &var, const Stmt *s) {
if (const Expr *e = dyn_cast<Expr>(s)) {
  // Skip the most common kinds of expressions that make
  // hierarchy-walking expensive.
  s = e = e->IgnoreParenCasts();

  if (const DeclRefExpr *ref = dyn_cast<DeclRefExpr>(e))
    return (ref->getDecl() == &var);
  if (const BlockExpr *be = dyn_cast<BlockExpr>(e)) {
    const BlockDecl *block = be->getBlockDecl();
    for (const auto &I : block->captures()) {
      if (I.getVariable() == &var)
        return true;
    }
  }
}

for (const Stmt *SubStmt : s->children())
  // SubStmt might be null; as in missing decl or conditional of an if-stmt.
  if (SubStmt && isAccessedBy(var, SubStmt))
    return true;

return false;
652}

654static bool isAccessedBy(const ValueDecl *decl, const Expr *e) {
if (!decl) return false;
if (!isa<VarDecl>(decl)) return false;
const VarDecl *var = cast<VarDecl>(decl);
return isAccessedBy(*var, e);
659}

661static bool tryEmitARCCopyWeakInit(CodeGenFunction &CGF,
                                 const LValue &destLV, const Expr *init) {
bool needsCast = false;

while (auto castExpr = dyn_cast<CastExpr>(init->IgnoreParens())) {
  switch (castExpr->getCastKind()) {
  // Look through casts that don't require representation changes.
  case CK_NoOp:
  case CK_BitCast:
  case CK_BlockPointerToObjCPointerCast:
    needsCast = true;
    break;

  // If we find an l-value to r-value cast from a __weak variable,
  // emit this operation as a copy or move.
  case CK_LValueToRValue: {
    const Expr *srcExpr = castExpr->getSubExpr();
    if (srcExpr->getType().getObjCLifetime() != Qualifiers::OCL_Weak)
      return false;

    // Emit the source l-value.
    LValue srcLV = CGF.EmitLValue(srcExpr);

    // Handle a formal type change to avoid asserting.
    auto srcAddr = srcLV.getAddress();
    if (needsCast) {
      srcAddr = CGF.Builder.CreateElementBitCast(srcAddr,
                                       destLV.getAddress().getElementType());
    }

    // If it was an l-value, use objc_copyWeak.
    if (srcExpr->getValueKind() == VK_LValue) {
      CGF.EmitARCCopyWeak(destLV.getAddress(), srcAddr);
    } else {
      assert(srcExpr->getValueKind() == VK_XValue)((srcExpr->getValueKind() == VK_XValue) ? static_cast<void
> (0) : __assert_fail ("srcExpr->getValueKind() == VK_XValue"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 695, __PRETTY_FUNCTION__));
      CGF.EmitARCMoveWeak(destLV.getAddress(), srcAddr);
    }
    return true;
  }

  // Stop at anything else.
  default:
    return false;
  }

  init = castExpr->getSubExpr();
}
return false;
709}

711static void drillIntoBlockVariable(CodeGenFunction &CGF,
                                 LValue &lvalue,
                                 const VarDecl *var) {
lvalue.setAddress(CGF.emitBlockByrefAddress(lvalue.getAddress(), var));
715}

717void CodeGenFunction::EmitNullabilityCheck(LValue LHS, llvm::Value *RHS,
                                         SourceLocation Loc) {
if (!SanOpts.has(SanitizerKind::NullabilityAssign))
  return;

auto Nullability = LHS.getType()->getNullability(getContext());
if (!Nullability || *Nullability != NullabilityKind::NonNull)
  return;

// Check if the right hand side of the assignment is nonnull, if the left
// hand side must be nonnull.
SanitizerScope SanScope(this);
llvm::Value *IsNotNull = Builder.CreateIsNotNull(RHS);
llvm::Constant *StaticData[] = {
    EmitCheckSourceLocation(Loc), EmitCheckTypeDescriptor(LHS.getType()),
    llvm::ConstantInt::get(Int8Ty, 0), // The LogAlignment info is unused.
    llvm::ConstantInt::get(Int8Ty, TCK_NonnullAssign)};
EmitCheck({{IsNotNull, SanitizerKind::NullabilityAssign}},
          SanitizerHandler::TypeMismatch, StaticData, RHS);
736}

738void CodeGenFunction::EmitScalarInit(const Expr *init, const ValueDecl *D,
                                   LValue lvalue, bool capturedByInit) {
Qualifiers::ObjCLifetime lifetime = lvalue.getObjCLifetime();
if (!lifetime) {
  llvm::Value *value = EmitScalarExpr(init);
  if (capturedByInit)
    drillIntoBlockVariable(*this, lvalue, cast<VarDecl>(D));
  EmitNullabilityCheck(lvalue, value, init->getExprLoc());
  EmitStoreThroughLValue(RValue::get(value), lvalue, true);
  return;
}

if (const CXXDefaultInitExpr *DIE = dyn_cast<CXXDefaultInitExpr>(init))
  init = DIE->getExpr();

// If we're emitting a value with lifetime, we have to do the
// initialization *before* we leave the cleanup scopes.
if (const FullExpr *fe = dyn_cast<FullExpr>(init)) {
  enterFullExpression(fe);
  init = fe->getSubExpr();
}
CodeGenFunction::RunCleanupsScope Scope(*this);

// We have to maintain the illusion that the variable is
// zero-initialized.  If the variable might be accessed in its
// initializer, zero-initialize before running the initializer, then
// actually perform the initialization with an assign.
bool accessedByInit = false;
if (lifetime != Qualifiers::OCL_ExplicitNone)
  accessedByInit = (capturedByInit || isAccessedBy(D, init));
if (accessedByInit) {
  LValue tempLV = lvalue;
  // Drill down to the __block object if necessary.
  if (capturedByInit) {
    // We can use a simple GEP for this because it can't have been
    // moved yet.
    tempLV.setAddress(emitBlockByrefAddress(tempLV.getAddress(),
                                            cast<VarDecl>(D),
                                            /*follow*/ false));
  }

  auto ty = cast<llvm::PointerType>(tempLV.getAddress().getElementType());
  llvm::Value *zero = CGM.getNullPointer(ty, tempLV.getType());

  // If __weak, we want to use a barrier under certain conditions.
  if (lifetime == Qualifiers::OCL_Weak)
    EmitARCInitWeak(tempLV.getAddress(), zero);

  // Otherwise just do a simple store.
  else
    EmitStoreOfScalar(zero, tempLV, /* isInitialization */ true);
}

// Emit the initializer.
llvm::Value *value = nullptr;

switch (lifetime) {
case Qualifiers::OCL_None:
  llvm_unreachable("present but none")::llvm::llvm_unreachable_internal("present but none", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 796);

case Qualifiers::OCL_Strong: {
  if (!D || !isa<VarDecl>(D) || !cast<VarDecl>(D)->isARCPseudoStrong()) {
    value = EmitARCRetainScalarExpr(init);
    break;
  }
  // If D is pseudo-strong, treat it like __unsafe_unretained here. This means
  // that we omit the retain, and causes non-autoreleased return values to be
  // immediately released.
  LLVM_FALLTHROUGH[[gnu::fallthrough]];
}

case Qualifiers::OCL_ExplicitNone:
  value = EmitARCUnsafeUnretainedScalarExpr(init);
  break;

case Qualifiers::OCL_Weak: {
  // If it's not accessed by the initializer, try to emit the
  // initialization with a copy or move.
  if (!accessedByInit && tryEmitARCCopyWeakInit(*this, lvalue, init)) {
    return;
  }

  // No way to optimize a producing initializer into this.  It's not
  // worth optimizing for, because the value will immediately
  // disappear in the common case.
  value = EmitScalarExpr(init);

  if (capturedByInit) drillIntoBlockVariable(*this, lvalue, cast<VarDecl>(D));
  if (accessedByInit)
    EmitARCStoreWeak(lvalue.getAddress(), value, /*ignored*/ true);
  else
    EmitARCInitWeak(lvalue.getAddress(), value);
  return;
}

case Qualifiers::OCL_Autoreleasing:
  value = EmitARCRetainAutoreleaseScalarExpr(init);
  break;
}

if (capturedByInit) drillIntoBlockVariable(*this, lvalue, cast<VarDecl>(D));

EmitNullabilityCheck(lvalue, value, init->getExprLoc());

// If the variable might have been accessed by its initializer, we
// might have to initialize with a barrier.  We have to do this for
// both __weak and __strong, but __weak got filtered out above.
if (accessedByInit && lifetime == Qualifiers::OCL_Strong) {
  llvm::Value *oldValue = EmitLoadOfScalar(lvalue, init->getExprLoc());
  EmitStoreOfScalar(value, lvalue, /* isInitialization */ true);
  EmitARCRelease(oldValue, ARCImpreciseLifetime);
  return;
}

EmitStoreOfScalar(value, lvalue, /* isInitialization */ true);
853}

855/// Decide whether we can emit the non-zero parts of the specified initializer
856/// with equal or fewer than NumStores scalar stores.
857static bool canEmitInitWithFewStoresAfterBZero(llvm::Constant *Init,
                                             unsigned &NumStores) {
// Zero and Undef never requires any extra stores.
if (isa<llvm::ConstantAggregateZero>(Init) ||
    isa<llvm::ConstantPointerNull>(Init) ||
    isa<llvm::UndefValue>(Init))
  return true;
if (isa<llvm::ConstantInt>(Init) || isa<llvm::ConstantFP>(Init) ||
    isa<llvm::ConstantVector>(Init) || isa<llvm::BlockAddress>(Init) ||
    isa<llvm::ConstantExpr>(Init))
  return Init->isNullValue() || NumStores--;

// See if we can emit each element.
if (isa<llvm::ConstantArray>(Init) || isa<llvm::ConstantStruct>(Init)) {
  for (unsigned i = 0, e = Init->getNumOperands(); i != e; ++i) {
    llvm::Constant *Elt = cast<llvm::Constant>(Init->getOperand(i));
    if (!canEmitInitWithFewStoresAfterBZero(Elt, NumStores))
      return false;
  }
  return true;
}

if (llvm::ConstantDataSequential *CDS =
      dyn_cast<llvm::ConstantDataSequential>(Init)) {
  for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i) {
    llvm::Constant *Elt = CDS->getElementAsConstant(i);
    if (!canEmitInitWithFewStoresAfterBZero(Elt, NumStores))
      return false;
  }
  return true;
}

// Anything else is hard and scary.
return false;
891}

893/// For inits that canEmitInitWithFewStoresAfterBZero returned true for, emit
894/// the scalar stores that would be required.
895static void emitStoresForInitAfterBZero(CodeGenModule &CGM,
                                      llvm::Constant *Init, Address Loc,
                                      bool isVolatile, CGBuilderTy &Builder) {
assert(!Init->isNullValue() && !isa<llvm::UndefValue>(Init) &&((!Init->isNullValue() && !isa<llvm::UndefValue
>(Init) && "called emitStoresForInitAfterBZero for zero or undef value."
) ? static_cast<void> (0) : __assert_fail ("!Init->isNullValue() && !isa<llvm::UndefValue>(Init) && \"called emitStoresForInitAfterBZero for zero or undef value.\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 899, __PRETTY_FUNCTION__))
       "called emitStoresForInitAfterBZero for zero or undef value.")((!Init->isNullValue() && !isa<llvm::UndefValue
>(Init) && "called emitStoresForInitAfterBZero for zero or undef value."
) ? static_cast<void> (0) : __assert_fail ("!Init->isNullValue() && !isa<llvm::UndefValue>(Init) && \"called emitStoresForInitAfterBZero for zero or undef value.\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 899, __PRETTY_FUNCTION__));

if (isa<llvm::ConstantInt>(Init) || isa<llvm::ConstantFP>(Init) ||
    isa<llvm::ConstantVector>(Init) || isa<llvm::BlockAddress>(Init) ||
    isa<llvm::ConstantExpr>(Init)) {
  Builder.CreateStore(Init, Loc, isVolatile);
  return;
}

if (llvm::ConstantDataSequential *CDS =
        dyn_cast<llvm::ConstantDataSequential>(Init)) {
  for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i) {
    llvm::Constant *Elt = CDS->getElementAsConstant(i);

    // If necessary, get a pointer to the element and emit it.
    if (!Elt->isNullValue() && !isa<llvm::UndefValue>(Elt))
      emitStoresForInitAfterBZero(
          CGM, Elt, Builder.CreateConstInBoundsGEP2_32(Loc, 0, i), isVolatile,
          Builder);
  }
  return;
}

assert((isa<llvm::ConstantStruct>(Init) || isa<llvm::ConstantArray>(Init)) &&(((isa<llvm::ConstantStruct>(Init) || isa<llvm::ConstantArray
>(Init)) && "Unknown value type!") ? static_cast<
void> (0) : __assert_fail ("(isa<llvm::ConstantStruct>(Init) || isa<llvm::ConstantArray>(Init)) && \"Unknown value type!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 923, __PRETTY_FUNCTION__))
       "Unknown value type!")(((isa<llvm::ConstantStruct>(Init) || isa<llvm::ConstantArray
>(Init)) && "Unknown value type!") ? static_cast<
void> (0) : __assert_fail ("(isa<llvm::ConstantStruct>(Init) || isa<llvm::ConstantArray>(Init)) && \"Unknown value type!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 923, __PRETTY_FUNCTION__));

for (unsigned i = 0, e = Init->getNumOperands(); i != e; ++i) {
  llvm::Constant *Elt = cast<llvm::Constant>(Init->getOperand(i));

  // If necessary, get a pointer to the element and emit it.
  if (!Elt->isNullValue() && !isa<llvm::UndefValue>(Elt))
    emitStoresForInitAfterBZero(CGM, Elt,
                                Builder.CreateConstInBoundsGEP2_32(Loc, 0, i),
                                isVolatile, Builder);
}
934}

936/// Decide whether we should use bzero plus some stores to initialize a local
937/// variable instead of using a memcpy from a constant global.  It is beneficial
938/// to use bzero if the global is all zeros, or mostly zeros and large.
939static bool shouldUseBZeroPlusStoresToInitialize(llvm::Constant *Init,
                                               uint64_t GlobalSize) {
// If a global is all zeros, always use a bzero.
if (isa<llvm::ConstantAggregateZero>(Init)) return true;

// If a non-zero global is <= 32 bytes, always use a memcpy.  If it is large,
// do it if it will require 6 or fewer scalar stores.
// TODO: Should budget depends on the size?  Avoiding a large global warrants
// plopping in more stores.
unsigned StoreBudget = 6;
uint64_t SizeLimit = 32;

return GlobalSize > SizeLimit &&
       canEmitInitWithFewStoresAfterBZero(Init, StoreBudget);
953}

955/// Decide whether we should use memset to initialize a local variable instead
956/// of using a memcpy from a constant global. Assumes we've already decided to
957/// not user bzero.
958/// FIXME We could be more clever, as we are for bzero above, and generate
959///       memset followed by stores. It's unclear that's worth the effort.
960static llvm::Value *shouldUseMemSetToInitialize(llvm::Constant *Init,
                                              uint64_t GlobalSize,
                                              const llvm::DataLayout &DL) {
uint64_t SizeLimit = 32;
if (GlobalSize <= SizeLimit)
  return nullptr;
return llvm::isBytewiseValue(Init, DL);
967}

969/// Decide whether we want to split a constant structure or array store into a
970/// sequence of its fields' stores. This may cost us code size and compilation
971/// speed, but plays better with store optimizations.
972static bool shouldSplitConstantStore(CodeGenModule &CGM,
                                   uint64_t GlobalByteSize) {
// Don't break things that occupy more than one cacheline.
uint64_t ByteSizeLimit = 64;
if (CGM.getCodeGenOpts().OptimizationLevel == 0)
  return false;
if (GlobalByteSize <= ByteSizeLimit)
  return true;
return false;
981}

983enum class IsPattern { No, Yes };

985/// Generate a constant filled with either a pattern or zeroes.
986static llvm::Constant *patternOrZeroFor(CodeGenModule &CGM, IsPattern isPattern,
                                      llvm::Type *Ty) {
if (isPattern == IsPattern::Yes)
  return initializationPatternFor(CGM, Ty);
else
  return llvm::Constant::getNullValue(Ty);
992}

994static llvm::Constant *constWithPadding(CodeGenModule &CGM, IsPattern isPattern,
                                      llvm::Constant *constant);

997/// Helper function for constWithPadding() to deal with padding in structures.
998static llvm::Constant *constStructWithPadding(CodeGenModule &CGM,
                                            IsPattern isPattern,
                                            llvm::StructType *STy,
                                            llvm::Constant *constant) {
const llvm::DataLayout &DL = CGM.getDataLayout();
const llvm::StructLayout *Layout = DL.getStructLayout(STy);
llvm::Type *Int8Ty = llvm::IntegerType::getInt8Ty(CGM.getLLVMContext());
unsigned SizeSoFar = 0;
SmallVector<llvm::Constant *, 8> Values;
bool NestedIntact = true;
for (unsigned i = 0, e = STy->getNumElements(); i != e; i++) {
  unsigned CurOff = Layout->getElementOffset(i);
  if (SizeSoFar < CurOff) {
    assert(!STy->isPacked())((!STy->isPacked()) ? static_cast<void> (0) : __assert_fail
 ("!STy->isPacked()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1011, __PRETTY_FUNCTION__));
    auto *PadTy = llvm::ArrayType::get(Int8Ty, CurOff - SizeSoFar);
    Values.push_back(patternOrZeroFor(CGM, isPattern, PadTy));
  }
  llvm::Constant *CurOp;
  if (constant->isZeroValue())
    CurOp = llvm::Constant::getNullValue(STy->getElementType(i));
  else
    CurOp = cast<llvm::Constant>(constant->getAggregateElement(i));
  auto *NewOp = constWithPadding(CGM, isPattern, CurOp);
  if (CurOp != NewOp)
    NestedIntact = false;
  Values.push_back(NewOp);
  SizeSoFar = CurOff + DL.getTypeAllocSize(CurOp->getType());
}
unsigned TotalSize = Layout->getSizeInBytes();
if (SizeSoFar < TotalSize) {
  auto *PadTy = llvm::ArrayType::get(Int8Ty, TotalSize - SizeSoFar);
  Values.push_back(patternOrZeroFor(CGM, isPattern, PadTy));
}
if (NestedIntact && Values.size() == STy->getNumElements())
  return constant;
return llvm::ConstantStruct::getAnon(Values, STy->isPacked());
1034}

1036/// Replace all padding bytes in a given constant with either a pattern byte or
1037/// 0x00.
1038static llvm::Constant *constWithPadding(CodeGenModule &CGM, IsPattern isPattern,
                                      llvm::Constant *constant) {
llvm::Type *OrigTy = constant->getType();
if (const auto STy = dyn_cast<llvm::StructType>(OrigTy))
  return constStructWithPadding(CGM, isPattern, STy, constant);
if (auto *STy = dyn_cast<llvm::SequentialType>(OrigTy)) {
  llvm::SmallVector<llvm::Constant *, 8> Values;
  unsigned Size = STy->getNumElements();
  if (!Size)
    return constant;
  llvm::Type *ElemTy = STy->getElementType();
  bool ZeroInitializer = constant->isZeroValue();
  llvm::Constant *OpValue, *PaddedOp;
  if (ZeroInitializer) {
    OpValue = llvm::Constant::getNullValue(ElemTy);
    PaddedOp = constWithPadding(CGM, isPattern, OpValue);
  }
  for (unsigned Op = 0; Op != Size; ++Op) {
    if (!ZeroInitializer) {
      OpValue = constant->getAggregateElement(Op);
      PaddedOp = constWithPadding(CGM, isPattern, OpValue);
    }
    Values.push_back(PaddedOp);
  }
  auto *NewElemTy = Values[0]->getType();
  if (NewElemTy == ElemTy)
    return constant;
  if (OrigTy->isArrayTy()) {
    auto *ArrayTy = llvm::ArrayType::get(NewElemTy, Size);
    return llvm::ConstantArray::get(ArrayTy, Values);
  } else {
    return llvm::ConstantVector::get(Values);
  }
}
return constant;
1073}

1075Address CodeGenModule::createUnnamedGlobalFrom(const VarDecl &D,
                                             llvm::Constant *Constant,
                                             CharUnits Align) {
auto FunctionName = [&](const DeclContext *DC) -> std::string {
  if (const auto *FD = dyn_cast<FunctionDecl>(DC)) {
    if (const auto *CC = dyn_cast<CXXConstructorDecl>(FD))
      return CC->getNameAsString();
    if (const auto *CD = dyn_cast<CXXDestructorDecl>(FD))
      return CD->getNameAsString();
    return getMangledName(FD);
  } else if (const auto *OM = dyn_cast<ObjCMethodDecl>(DC)) {
    return OM->getNameAsString();
  } else if (isa<BlockDecl>(DC)) {
    return "<block>";
  } else if (isa<CapturedDecl>(DC)) {
    return "<captured>";
  } else {
    llvm_unreachable("expected a function or method")::llvm::llvm_unreachable_internal("expected a function or method"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1092);
  }
};

// Form a simple per-variable cache of these values in case we find we
// want to reuse them.
llvm::GlobalVariable *&CacheEntry = InitializerConstants[&D];
if (!CacheEntry || CacheEntry->getInitializer() != Constant) {
  auto *Ty = Constant->getType();
  bool isConstant = true;
  llvm::GlobalVariable *InsertBefore = nullptr;
  unsigned AS =
      getContext().getTargetAddressSpace(getStringLiteralAddressSpace());
  std::string Name;
  if (D.hasGlobalStorage())
    Name = getMangledName(&D).str() + ".const";
  else if (const DeclContext *DC = D.getParentFunctionOrMethod())
    Name = ("__const." + FunctionName(DC) + "." + D.getName()).str();
  else
    llvm_unreachable("local variable has no parent function or method")::llvm::llvm_unreachable_internal("local variable has no parent function or method"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1111);
  llvm::GlobalVariable *GV = new llvm::GlobalVariable(
      getModule(), Ty, isConstant, llvm::GlobalValue::PrivateLinkage,
      Constant, Name, InsertBefore, llvm::GlobalValue::NotThreadLocal, AS);
  GV->setAlignment(Align.getQuantity());
  GV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global);
  CacheEntry = GV;
} else if (CacheEntry->getAlignment() < Align.getQuantity()) {
  CacheEntry->setAlignment(Align.getQuantity());
}

return Address(CacheEntry, Align);
1123}

1125static Address createUnnamedGlobalForMemcpyFrom(CodeGenModule &CGM,
                                              const VarDecl &D,
                                              CGBuilderTy &Builder,
                                              llvm::Constant *Constant,
                                              CharUnits Align) {
Address SrcPtr = CGM.createUnnamedGlobalFrom(D, Constant, Align);
llvm::Type *BP = llvm::PointerType::getInt8PtrTy(CGM.getLLVMContext(),
                                                 SrcPtr.getAddressSpace());
if (SrcPtr.getType() != BP)
  SrcPtr = Builder.CreateBitCast(SrcPtr, BP);
return SrcPtr;
1136}

1138static void emitStoresForConstant(CodeGenModule &CGM, const VarDecl &D,
                                Address Loc, bool isVolatile,
                                CGBuilderTy &Builder,
                                llvm::Constant *constant) {
auto *Ty = constant->getType();
uint64_t ConstantSize = CGM.getDataLayout().getTypeAllocSize(Ty);
if (!ConstantSize)
  return;

bool canDoSingleStore = Ty->isIntOrIntVectorTy() ||
                        Ty->isPtrOrPtrVectorTy() || Ty->isFPOrFPVectorTy();
if (canDoSingleStore) {
  Builder.CreateStore(constant, Loc, isVolatile);
  return;
}

auto *SizeVal = llvm::ConstantInt::get(CGM.IntPtrTy, ConstantSize);

// If the initializer is all or mostly the same, codegen with bzero / memset
// then do a few stores afterward.
if (shouldUseBZeroPlusStoresToInitialize(constant, ConstantSize)) {
  Builder.CreateMemSet(Loc, llvm::ConstantInt::get(CGM.Int8Ty, 0), SizeVal,
                       isVolatile);

  bool valueAlreadyCorrect =
      constant->isNullValue() || isa<llvm::UndefValue>(constant);
  if (!valueAlreadyCorrect) {
    Loc = Builder.CreateBitCast(Loc, Ty->getPointerTo(Loc.getAddressSpace()));
    emitStoresForInitAfterBZero(CGM, constant, Loc, isVolatile, Builder);
  }
  return;
}

// If the initializer is a repeated byte pattern, use memset.
llvm::Value *Pattern =
    shouldUseMemSetToInitialize(constant, ConstantSize, CGM.getDataLayout());
if (Pattern) {
  uint64_t Value = 0x00;
  if (!isa<llvm::UndefValue>(Pattern)) {
    const llvm::APInt &AP = cast<llvm::ConstantInt>(Pattern)->getValue();
    assert(AP.getBitWidth() <= 8)((AP.getBitWidth() <= 8) ? static_cast<void> (0) : __assert_fail
 ("AP.getBitWidth() <= 8", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1178, __PRETTY_FUNCTION__));
    Value = AP.getLimitedValue();
  }
  Builder.CreateMemSet(Loc, llvm::ConstantInt::get(CGM.Int8Ty, Value), SizeVal,
                       isVolatile);
  return;
}

// If the initializer is small, use a handful of stores.
if (shouldSplitConstantStore(CGM, ConstantSize)) {
  if (auto *STy = dyn_cast<llvm::StructType>(Ty)) {
    // FIXME: handle the case when STy != Loc.getElementType().
    if (STy == Loc.getElementType()) {
      for (unsigned i = 0; i != constant->getNumOperands(); i++) {
        Address EltPtr = Builder.CreateStructGEP(Loc, i);
        emitStoresForConstant(
            CGM, D, EltPtr, isVolatile, Builder,
            cast<llvm::Constant>(Builder.CreateExtractValue(constant, i)));
      }
      return;
    }
  } else if (auto *ATy = dyn_cast<llvm::ArrayType>(Ty)) {
    // FIXME: handle the case when ATy != Loc.getElementType().
    if (ATy == Loc.getElementType()) {
      for (unsigned i = 0; i != ATy->getNumElements(); i++) {
        Address EltPtr = Builder.CreateConstArrayGEP(Loc, i);
        emitStoresForConstant(
            CGM, D, EltPtr, isVolatile, Builder,
            cast<llvm::Constant>(Builder.CreateExtractValue(constant, i)));
      }
      return;
    }
  }
}

// Copy from a global.
Builder.CreateMemCpy(Loc,
                     createUnnamedGlobalForMemcpyFrom(
                         CGM, D, Builder, constant, Loc.getAlignment()),
                     SizeVal, isVolatile);
1218}

1220static void emitStoresForZeroInit(CodeGenModule &CGM, const VarDecl &D,
                                Address Loc, bool isVolatile,
                                CGBuilderTy &Builder) {
llvm::Type *ElTy = Loc.getElementType();
llvm::Constant *constant =
    constWithPadding(CGM, IsPattern::No, llvm::Constant::getNullValue(ElTy));
emitStoresForConstant(CGM, D, Loc, isVolatile, Builder, constant);
1227}

1229static void emitStoresForPatternInit(CodeGenModule &CGM, const VarDecl &D,
                                   Address Loc, bool isVolatile,
                                   CGBuilderTy &Builder) {
llvm::Type *ElTy = Loc.getElementType();
llvm::Constant *constant = constWithPadding(
    CGM, IsPattern::Yes, initializationPatternFor(CGM, ElTy));
assert(!isa<llvm::UndefValue>(constant))((!isa<llvm::UndefValue>(constant)) ? static_cast<void
> (0) : __assert_fail ("!isa<llvm::UndefValue>(constant)"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1235, __PRETTY_FUNCTION__));
emitStoresForConstant(CGM, D, Loc, isVolatile, Builder, constant);
1237}

1239static bool containsUndef(llvm::Constant *constant) {
auto *Ty = constant->getType();
if (isa<llvm::UndefValue>(constant))
  return true;
if (Ty->isStructTy() || Ty->isArrayTy() || Ty->isVectorTy())
  for (llvm::Use &Op : constant->operands())
    if (containsUndef(cast<llvm::Constant>(Op)))
      return true;
return false;
1248}

1250static llvm::Constant *replaceUndef(CodeGenModule &CGM, IsPattern isPattern,
                                  llvm::Constant *constant) {
auto *Ty = constant->getType();
if (isa<llvm::UndefValue>(constant))
  return patternOrZeroFor(CGM, isPattern, Ty);
if (!(Ty->isStructTy() || Ty->isArrayTy() || Ty->isVectorTy()))
  return constant;
if (!containsUndef(constant))
  return constant;
llvm::SmallVector<llvm::Constant *, 8> Values(constant->getNumOperands());
for (unsigned Op = 0, NumOp = constant->getNumOperands(); Op != NumOp; ++Op) {
  auto *OpValue = cast<llvm::Constant>(constant->getOperand(Op));
  Values[Op] = replaceUndef(CGM, isPattern, OpValue);
}
if (Ty->isStructTy())
  return llvm::ConstantStruct::get(cast<llvm::StructType>(Ty), Values);
if (Ty->isArrayTy())
  return llvm::ConstantArray::get(cast<llvm::ArrayType>(Ty), Values);
assert(Ty->isVectorTy())((Ty->isVectorTy()) ? static_cast<void> (0) : __assert_fail
 ("Ty->isVectorTy()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1268, __PRETTY_FUNCTION__));
return llvm::ConstantVector::get(Values);
1270}

1272/// EmitAutoVarDecl - Emit code and set up an entry in LocalDeclMap for a
1273/// variable declaration with auto, register, or no storage class specifier.
1274/// These turn into simple stack objects, or GlobalValues depending on target.
1275void CodeGenFunction::EmitAutoVarDecl(const VarDecl &D) {
AutoVarEmission emission = EmitAutoVarAlloca(D);
EmitAutoVarInit(emission);
EmitAutoVarCleanups(emission);
1279}

1281/// Emit a lifetime.begin marker if some criteria are satisfied.
1282/// \return a pointer to the temporary size Value if a marker was emitted, null
1283/// otherwise
1284llvm::Value *CodeGenFunction::EmitLifetimeStart(uint64_t Size,
                                              llvm::Value *Addr) {
if (!ShouldEmitLifetimeMarkers)
  return nullptr;

assert(Addr->getType()->getPointerAddressSpace() ==((Addr->getType()->getPointerAddressSpace() == CGM.getDataLayout
().getAllocaAddrSpace() && "Pointer should be in alloca address space"
) ? static_cast<void> (0) : __assert_fail ("Addr->getType()->getPointerAddressSpace() == CGM.getDataLayout().getAllocaAddrSpace() && \"Pointer should be in alloca address space\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1291, __PRETTY_FUNCTION__))
           CGM.getDataLayout().getAllocaAddrSpace() &&((Addr->getType()->getPointerAddressSpace() == CGM.getDataLayout
().getAllocaAddrSpace() && "Pointer should be in alloca address space"
) ? static_cast<void> (0) : __assert_fail ("Addr->getType()->getPointerAddressSpace() == CGM.getDataLayout().getAllocaAddrSpace() && \"Pointer should be in alloca address space\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1291, __PRETTY_FUNCTION__))
       "Pointer should be in alloca address space")((Addr->getType()->getPointerAddressSpace() == CGM.getDataLayout
().getAllocaAddrSpace() && "Pointer should be in alloca address space"
) ? static_cast<void> (0) : __assert_fail ("Addr->getType()->getPointerAddressSpace() == CGM.getDataLayout().getAllocaAddrSpace() && \"Pointer should be in alloca address space\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1291, __PRETTY_FUNCTION__));
llvm::Value *SizeV = llvm::ConstantInt::get(Int64Ty, Size);
Addr = Builder.CreateBitCast(Addr, AllocaInt8PtrTy);
llvm::CallInst *C =
    Builder.CreateCall(CGM.getLLVMLifetimeStartFn(), {SizeV, Addr});
C->setDoesNotThrow();
return SizeV;
1298}

1300void CodeGenFunction::EmitLifetimeEnd(llvm::Value *Size, llvm::Value *Addr) {
assert(Addr->getType()->getPointerAddressSpace() ==((Addr->getType()->getPointerAddressSpace() == CGM.getDataLayout
().getAllocaAddrSpace() && "Pointer should be in alloca address space"
) ? static_cast<void> (0) : __assert_fail ("Addr->getType()->getPointerAddressSpace() == CGM.getDataLayout().getAllocaAddrSpace() && \"Pointer should be in alloca address space\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1303, __PRETTY_FUNCTION__))
           CGM.getDataLayout().getAllocaAddrSpace() &&((Addr->getType()->getPointerAddressSpace() == CGM.getDataLayout
().getAllocaAddrSpace() && "Pointer should be in alloca address space"
) ? static_cast<void> (0) : __assert_fail ("Addr->getType()->getPointerAddressSpace() == CGM.getDataLayout().getAllocaAddrSpace() && \"Pointer should be in alloca address space\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1303, __PRETTY_FUNCTION__))
       "Pointer should be in alloca address space")((Addr->getType()->getPointerAddressSpace() == CGM.getDataLayout
().getAllocaAddrSpace() && "Pointer should be in alloca address space"
) ? static_cast<void> (0) : __assert_fail ("Addr->getType()->getPointerAddressSpace() == CGM.getDataLayout().getAllocaAddrSpace() && \"Pointer should be in alloca address space\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1303, __PRETTY_FUNCTION__));
Addr = Builder.CreateBitCast(Addr, AllocaInt8PtrTy);
llvm::CallInst *C =
    Builder.CreateCall(CGM.getLLVMLifetimeEndFn(), {Size, Addr});
C->setDoesNotThrow();
1308}

1310void CodeGenFunction::EmitAndRegisterVariableArrayDimensions(
  CGDebugInfo *DI, const VarDecl &D, bool EmitDebugInfo) {
// For each dimension stores its QualType and corresponding
// size-expression Value.
SmallVector<CodeGenFunction::VlaSizePair, 4> Dimensions;
SmallVector<IdentifierInfo *, 4> VLAExprNames;

// Break down the array into individual dimensions.
QualType Type1D = D.getType();
while (getContext().getAsVariableArrayType(Type1D)) {
  auto VlaSize = getVLAElements1D(Type1D);
  if (auto *C = dyn_cast<llvm::ConstantInt>(VlaSize.NumElts))
    Dimensions.emplace_back(C, Type1D.getUnqualifiedType());
  else {
    // Generate a locally unique name for the size expression.
    Twine Name = Twine("__vla_expr") + Twine(VLAExprCounter++);
    SmallString<12> Buffer;
    StringRef NameRef = Name.toStringRef(Buffer);
    auto &Ident = getContext().Idents.getOwn(NameRef);
    VLAExprNames.push_back(&Ident);
    auto SizeExprAddr =
        CreateDefaultAlignTempAlloca(VlaSize.NumElts->getType(), NameRef);
    Builder.CreateStore(VlaSize.NumElts, SizeExprAddr);
    Dimensions.emplace_back(SizeExprAddr.getPointer(),
                            Type1D.getUnqualifiedType());
  }
  Type1D = VlaSize.Type;
}

if (!EmitDebugInfo)
  return;

// Register each dimension's size-expression with a DILocalVariable,
// so that it can be used by CGDebugInfo when instantiating a DISubrange
// to describe this array.
unsigned NameIdx = 0;
for (auto &VlaSize : Dimensions) {
  llvm::Metadata *MD;
  if (auto *C = dyn_cast<llvm::ConstantInt>(VlaSize.NumElts))
    MD = llvm::ConstantAsMetadata::get(C);
  else {
    // Create an artificial VarDecl to generate debug info for.
    IdentifierInfo *NameIdent = VLAExprNames[NameIdx++];
    auto VlaExprTy = VlaSize.NumElts->getType()->getPointerElementType();
    auto QT = getContext().getIntTypeForBitwidth(
        VlaExprTy->getScalarSizeInBits(), false);
    auto *ArtificialDecl = VarDecl::Create(
        getContext(), const_cast<DeclContext *>(D.getDeclContext()),
        D.getLocation(), D.getLocation(), NameIdent, QT,
        getContext().CreateTypeSourceInfo(QT), SC_Auto);
    ArtificialDecl->setImplicit();

    MD = DI->EmitDeclareOfAutoVariable(ArtificialDecl, VlaSize.NumElts,
                                       Builder);
  }
  assert(MD && "No Size expression debug node created")((MD && "No Size expression debug node created") ? static_cast
<void> (0) : __assert_fail ("MD && \"No Size expression debug node created\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1365, __PRETTY_FUNCTION__));
  DI->registerVLASizeExpression(VlaSize.Type, MD);
}
1368}

1370/// EmitAutoVarAlloca - Emit the alloca and debug information for a
1371/// local variable.  Does not emit initialization or destruction.
1372CodeGenFunction::AutoVarEmission
1373CodeGenFunction::EmitAutoVarAlloca(const VarDecl &D) {
QualType Ty = D.getType();
assert(((Ty.getAddressSpace() == LangAS::Default || (Ty.getAddressSpace
() == LangAS::opencl_private && getLangOpts().OpenCL)
) ? static_cast<void> (0) : __assert_fail ("Ty.getAddressSpace() == LangAS::Default || (Ty.getAddressSpace() == LangAS::opencl_private && getLangOpts().OpenCL)"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1377, __PRETTY_FUNCTION__))
    Ty.getAddressSpace() == LangAS::Default ||((Ty.getAddressSpace() == LangAS::Default || (Ty.getAddressSpace
() == LangAS::opencl_private && getLangOpts().OpenCL)
) ? static_cast<void> (0) : __assert_fail ("Ty.getAddressSpace() == LangAS::Default || (Ty.getAddressSpace() == LangAS::opencl_private && getLangOpts().OpenCL)"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1377, __PRETTY_FUNCTION__))
    (Ty.getAddressSpace() == LangAS::opencl_private && getLangOpts().OpenCL))((Ty.getAddressSpace() == LangAS::Default || (Ty.getAddressSpace
() == LangAS::opencl_private && getLangOpts().OpenCL)
) ? static_cast<void> (0) : __assert_fail ("Ty.getAddressSpace() == LangAS::Default || (Ty.getAddressSpace() == LangAS::opencl_private && getLangOpts().OpenCL)"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1377, __PRETTY_FUNCTION__));

AutoVarEmission emission(D);

bool isEscapingByRef = D.isEscapingByref();
emission.IsEscapingByRef = isEscapingByRef;

CharUnits alignment = getContext().getDeclAlign(&D);

// If the type is variably-modified, emit all the VLA sizes for it.
if (Ty->isVariablyModifiedType())
  EmitVariablyModifiedType(Ty);

auto *DI = getDebugInfo();
bool EmitDebugInfo = DI && CGM.getCodeGenOpts().getDebugInfo() >=
                               codegenoptions::LimitedDebugInfo;

Address address = Address::invalid();
Address AllocaAddr = Address::invalid();
Address OpenMPLocalAddr =
    getLangOpts().OpenMP
        ? CGM.getOpenMPRuntime().getAddressOfLocalVariable(*this, &D)
        : Address::invalid();
bool NRVO = getLangOpts().ElideConstructors && D.isNRVOVariable();

if (getLangOpts().OpenMP && OpenMPLocalAddr.isValid()) {
  address = OpenMPLocalAddr;
} else if (Ty->isConstantSizeType()) {
  // If this value is an array or struct with a statically determinable
  // constant initializer, there are optimizations we can do.
  //
  // TODO: We should constant-evaluate the initializer of any variable,
  // as long as it is initialized by a constant expression. Currently,
  // isConstantInitializer produces wrong answers for structs with
  // reference or bitfield members, and a few other cases, and checking
  // for POD-ness protects us from some of these.
  if (D.getInit() && (Ty->isArrayType() || Ty->isRecordType()) &&
      (D.isConstexpr() ||
       ((Ty.isPODType(getContext()) ||
         getContext().getBaseElementType(Ty)->isObjCObjectPointerType()) &&
        D.getInit()->isConstantInitializer(getContext(), false)))) {

    // If the variable's a const type, and it's neither an NRVO
    // candidate nor a __block variable and has no mutable members,
    // emit it as a global instead.
    // Exception is if a variable is located in non-constant address space
    // in OpenCL.
    if ((!getLangOpts().OpenCL ||
         Ty.getAddressSpace() == LangAS::opencl_constant) &&
        (CGM.getCodeGenOpts().MergeAllConstants && !NRVO &&
         !isEscapingByRef && CGM.isTypeConstant(Ty, true))) {
      EmitStaticVarDecl(D, llvm::GlobalValue::InternalLinkage);

      // Signal this condition to later callbacks.
      emission.Addr = Address::invalid();
      assert(emission.wasEmittedAsGlobal())((emission.wasEmittedAsGlobal()) ? static_cast<void> (0
) : __assert_fail ("emission.wasEmittedAsGlobal()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1432, __PRETTY_FUNCTION__));
      return emission;
    }

    // Otherwise, tell the initialization code that we're in this case.
    emission.IsConstantAggregate = true;
  }

  // A normal fixed sized variable becomes an alloca in the entry block,
  // unless:
  // - it's an NRVO variable.
  // - we are compiling OpenMP and it's an OpenMP local variable.
  if (NRVO) {
    // The named return value optimization: allocate this variable in the
    // return slot, so that we can elide the copy when returning this
    // variable (C++0x [class.copy]p34).
    address = ReturnValue;

    if (const RecordType *RecordTy = Ty->getAs<RecordType>()) {
      const auto *RD = RecordTy->getDecl();
      const auto *CXXRD = dyn_cast<CXXRecordDecl>(RD);
      if ((CXXRD && !CXXRD->hasTrivialDestructor()) ||
          RD->isNonTrivialToPrimitiveDestroy()) {
        // Create a flag that is used to indicate when the NRVO was applied
        // to this variable. Set it to zero to indicate that NRVO was not
        // applied.
        llvm::Value *Zero = Builder.getFalse();
        Address NRVOFlag =
          CreateTempAlloca(Zero->getType(), CharUnits::One(), "nrvo");
        EnsureInsertPoint();
        Builder.CreateStore(Zero, NRVOFlag);

        // Record the NRVO flag for this variable.
        NRVOFlags[&D] = NRVOFlag.getPointer();
        emission.NRVOFlag = NRVOFlag.getPointer();
      }
    }
  } else {
    CharUnits allocaAlignment;
    llvm::Type *allocaTy;
    if (isEscapingByRef) {
      auto &byrefInfo = getBlockByrefInfo(&D);
      allocaTy = byrefInfo.Type;
      allocaAlignment = byrefInfo.ByrefAlignment;
    } else {
      allocaTy = ConvertTypeForMem(Ty);
      allocaAlignment = alignment;
    }

    // Create the alloca.  Note that we set the name separately from
    // building the instruction so that it's there even in no-asserts
    // builds.
    address = CreateTempAlloca(allocaTy, allocaAlignment, D.getName(),
                               /*ArraySize=*/nullptr, &AllocaAddr);

    // Don't emit lifetime markers for MSVC catch parameters. The lifetime of
    // the catch parameter starts in the catchpad instruction, and we can't
    // insert code in those basic blocks.
    bool IsMSCatchParam =
        D.isExceptionVariable() && getTarget().getCXXABI().isMicrosoft();

    // Emit a lifetime intrinsic if meaningful. There's no point in doing this
    // if we don't have a valid insertion point (?).
    if (HaveInsertPoint() && !IsMSCatchParam) {
      // If there's a jump into the lifetime of this variable, its lifetime
      // gets broken up into several regions in IR, which requires more work
      // to handle correctly. For now, just omit the intrinsics; this is a
      // rare case, and it's better to just be conservatively correct.
      // PR28267.
      //
      // We have to do this in all language modes if there's a jump past the
      // declaration. We also have to do it in C if there's a jump to an
      // earlier point in the current block because non-VLA lifetimes begin as
      // soon as the containing block is entered, not when its variables
      // actually come into scope; suppressing the lifetime annotations
      // completely in this case is unnecessarily pessimistic, but again, this
      // is rare.
      if (!Bypasses.IsBypassed(&D) &&
          !(!getLangOpts().CPlusPlus && hasLabelBeenSeenInCurrentScope())) {
        uint64_t size = CGM.getDataLayout().getTypeAllocSize(allocaTy);
        emission.SizeForLifetimeMarkers =
            EmitLifetimeStart(size, AllocaAddr.getPointer());
      }
    } else {
      assert(!emission.useLifetimeMarkers())((!emission.useLifetimeMarkers()) ? static_cast<void> (
0) : __assert_fail ("!emission.useLifetimeMarkers()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1516, __PRETTY_FUNCTION__));
    }
  }
} else {
  EnsureInsertPoint();

  if (!DidCallStackSave) {
    // Save the stack.
    Address Stack =
      CreateTempAlloca(Int8PtrTy, getPointerAlign(), "saved_stack");

    llvm::Function *F = CGM.getIntrinsic(llvm::Intrinsic::stacksave);
    llvm::Value *V = Builder.CreateCall(F);
    Builder.CreateStore(V, Stack);

    DidCallStackSave = true;

    // Push a cleanup block and restore the stack there.
    // FIXME: in general circumstances, this should be an EH cleanup.
    pushStackRestore(NormalCleanup, Stack);
  }

  auto VlaSize = getVLASize(Ty);
  llvm::Type *llvmTy = ConvertTypeForMem(VlaSize.Type);

  // Allocate memory for the array.
  address = CreateTempAlloca(llvmTy, alignment, "vla", VlaSize.NumElts,
                             &AllocaAddr);

  // If we have debug info enabled, properly describe the VLA dimensions for
  // this type by registering the vla size expression for each of the
  // dimensions.
  EmitAndRegisterVariableArrayDimensions(DI, D, EmitDebugInfo);
}

setAddrOfLocalVar(&D, address);
emission.Addr = address;
emission.AllocaAddr = AllocaAddr;

// Emit debug info for local var declaration.
if (EmitDebugInfo && HaveInsertPoint()) {
  Address DebugAddr = address;
  bool UsePointerValue = NRVO && ReturnValuePointer.isValid();
  DI->setLocation(D.getLocation());

  // If NRVO, use a pointer to the return address.
  if (UsePointerValue)
    DebugAddr = ReturnValuePointer;

  (void)DI->EmitDeclareOfAutoVariable(&D, DebugAddr.getPointer(), Builder,
                                      UsePointerValue);
}

if (D.hasAttr<AnnotateAttr>() && HaveInsertPoint())
  EmitVarAnnotations(&D, address.getPointer());

// Make sure we call @llvm.lifetime.end.
if (emission.useLifetimeMarkers())
  EHStack.pushCleanup<CallLifetimeEnd>(NormalEHLifetimeMarker,
                                       emission.getOriginalAllocatedAddress(),
                                       emission.getSizeForLifetimeMarkers());

return emission;
1579}

1581static bool isCapturedBy(const VarDecl &, const Expr *);

1583/// Determines whether the given __block variable is potentially
1584/// captured by the given statement.
1585static bool isCapturedBy(const VarDecl &Var, const Stmt *S) {
if (const Expr *E = dyn_cast<Expr>(S))
  return isCapturedBy(Var, E);
for (const Stmt *SubStmt : S->children())
  if (isCapturedBy(Var, SubStmt))
    return true;
return false;
1592}

1594/// Determines whether the given __block variable is potentially
1595/// captured by the given expression.
1596static bool isCapturedBy(const VarDecl &Var, const Expr *E) {
// Skip the most common kinds of expressions that make
// hierarchy-walking expensive.
E = E->IgnoreParenCasts();

if (const BlockExpr *BE = dyn_cast<BlockExpr>(E)) {
  const BlockDecl *Block = BE->getBlockDecl();
  for (const auto &I : Block->captures()) {
    if (I.getVariable() == &Var)
      return true;
  }

  // No need to walk into the subexpressions.
  return false;
}

if (const StmtExpr *SE = dyn_cast<StmtExpr>(E)) {
  const CompoundStmt *CS = SE->getSubStmt();
  for (const auto *BI : CS->body())
    if (const auto *BIE = dyn_cast<Expr>(BI)) {
      if (isCapturedBy(Var, BIE))
        return true;
    }
    else if (const auto *DS = dyn_cast<DeclStmt>(BI)) {
        // special case declarations
        for (const auto *I : DS->decls()) {
            if (const auto *VD = dyn_cast<VarDecl>((I))) {
              const Expr *Init = VD->getInit();
              if (Init && isCapturedBy(Var, Init))
                return true;
            }
        }
    }
    else
      // FIXME. Make safe assumption assuming arbitrary statements cause capturing.
      // Later, provide code to poke into statements for capture analysis.
      return true;
  return false;
}

for (const Stmt *SubStmt : E->children())
  if (isCapturedBy(Var, SubStmt))
    return true;

return false;
1641}

1643/// Determine whether the given initializer is trivial in the sense
1644/// that it requires no code to be generated.
1645bool CodeGenFunction::isTrivialInitializer(const Expr *Init) {
if (!Init)
  return true;

if (const CXXConstructExpr *Construct = dyn_cast<CXXConstructExpr>(Init))
  if (CXXConstructorDecl *Constructor = Construct->getConstructor())
    if (Constructor->isTrivial() &&
        Constructor->isDefaultConstructor() &&
        !Construct->requiresZeroInitialization())
      return true;

return false;
1657}

1659void CodeGenFunction::emitZeroOrPatternForAutoVarInit(QualType type,
                                                    const VarDecl &D,
                                                    Address Loc) {
auto trivialAutoVarInit = getContext().getLangOpts().getTrivialAutoVarInit();
CharUnits Size = getContext().getTypeSizeInChars(type);
bool isVolatile = type.isVolatileQualified();
if (!Size.isZero()) {
  switch (trivialAutoVarInit) {
  case LangOptions::TrivialAutoVarInitKind::Uninitialized:
    llvm_unreachable("Uninitialized handled by caller")::llvm::llvm_unreachable_internal("Uninitialized handled by caller"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1668);
  case LangOptions::TrivialAutoVarInitKind::Zero:
    emitStoresForZeroInit(CGM, D, Loc, isVolatile, Builder);
    break;
  case LangOptions::TrivialAutoVarInitKind::Pattern:
    emitStoresForPatternInit(CGM, D, Loc, isVolatile, Builder);
    break;
  }
  return;
}

// VLAs look zero-sized to getTypeInfo. We can't emit constant stores to
// them, so emit a memcpy with the VLA size to initialize each element.
// Technically zero-sized or negative-sized VLAs are undefined, and UBSan
// will catch that code, but there exists code which generates zero-sized
// VLAs. Be nice and initialize whatever they requested.
const auto *VlaType = getContext().getAsVariableArrayType(type);
if (!VlaType)
  return;
auto VlaSize = getVLASize(VlaType);
auto SizeVal = VlaSize.NumElts;
CharUnits EltSize = getContext().getTypeSizeInChars(VlaSize.Type);
switch (trivialAutoVarInit) {
case LangOptions::TrivialAutoVarInitKind::Uninitialized:
  llvm_unreachable("Uninitialized handled by caller")::llvm::llvm_unreachable_internal("Uninitialized handled by caller"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1692);

case LangOptions::TrivialAutoVarInitKind::Zero:
  if (!EltSize.isOne())
    SizeVal = Builder.CreateNUWMul(SizeVal, CGM.getSize(EltSize));
  Builder.CreateMemSet(Loc, llvm::ConstantInt::get(Int8Ty, 0), SizeVal,
                       isVolatile);
  break;

case LangOptions::TrivialAutoVarInitKind::Pattern: {
  llvm::Type *ElTy = Loc.getElementType();
  llvm::Constant *Constant = constWithPadding(
      CGM, IsPattern::Yes, initializationPatternFor(CGM, ElTy));
  CharUnits ConstantAlign = getContext().getTypeAlignInChars(VlaSize.Type);
  llvm::BasicBlock *SetupBB = createBasicBlock("vla-setup.loop");
  llvm::BasicBlock *LoopBB = createBasicBlock("vla-init.loop");
  llvm::BasicBlock *ContBB = createBasicBlock("vla-init.cont");
  llvm::Value *IsZeroSizedVLA = Builder.CreateICmpEQ(
      SizeVal, llvm::ConstantInt::get(SizeVal->getType(), 0),
      "vla.iszerosized");
  Builder.CreateCondBr(IsZeroSizedVLA, ContBB, SetupBB);
  EmitBlock(SetupBB);
  if (!EltSize.isOne())
    SizeVal = Builder.CreateNUWMul(SizeVal, CGM.getSize(EltSize));
  llvm::Value *BaseSizeInChars =
      llvm::ConstantInt::get(IntPtrTy, EltSize.getQuantity());
  Address Begin = Builder.CreateElementBitCast(Loc, Int8Ty, "vla.begin");
  llvm::Value *End =
      Builder.CreateInBoundsGEP(Begin.getPointer(), SizeVal, "vla.end");
  llvm::BasicBlock *OriginBB = Builder.GetInsertBlock();
  EmitBlock(LoopBB);
  llvm::PHINode *Cur = Builder.CreatePHI(Begin.getType(), 2, "vla.cur");
  Cur->addIncoming(Begin.getPointer(), OriginBB);
  CharUnits CurAlign = Loc.getAlignment().alignmentOfArrayElement(EltSize);
  Builder.CreateMemCpy(Address(Cur, CurAlign),
                       createUnnamedGlobalForMemcpyFrom(
                           CGM, D, Builder, Constant, ConstantAlign),
                       BaseSizeInChars, isVolatile);
  llvm::Value *Next =
      Builder.CreateInBoundsGEP(Int8Ty, Cur, BaseSizeInChars, "vla.next");
  llvm::Value *Done = Builder.CreateICmpEQ(Next, End, "vla-init.isdone");
  Builder.CreateCondBr(Done, ContBB, LoopBB);
  Cur->addIncoming(Next, LoopBB);
  EmitBlock(ContBB);
} break;
}
1738}

1740void CodeGenFunction::EmitAutoVarInit(const AutoVarEmission &emission) {
assert(emission.Variable && "emission was not valid!")((emission.Variable && "emission was not valid!") ? static_cast
<void> (0) : __assert_fail ("emission.Variable && \"emission was not valid!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1741, __PRETTY_FUNCTION__));

// If this was emitted as a global constant, we're done.
if (emission.wasEmittedAsGlobal()) return;

const VarDecl &D = *emission.Variable;
auto DL = ApplyDebugLocation::CreateDefaultArtificial(*this, D.getLocation());
QualType type = D.getType();

// If this local has an initializer, emit it now.
const Expr *Init = D.getInit();

// If we are at an unreachable point, we don't need to emit the initializer
// unless it contains a label.
if (!HaveInsertPoint()) {
  if (!Init || !ContainsLabel(Init)) return;
  EnsureInsertPoint();
}

// Initialize the structure of a __block variable.
if (emission.IsEscapingByRef)
  emitByrefStructureInit(emission);

// Initialize the variable here if it doesn't have a initializer and it is a
// C struct that is non-trivial to initialize or an array containing such a
// struct.
if (!Init &&
    type.isNonTrivialToPrimitiveDefaultInitialize() ==
        QualType::PDIK_Struct) {
  LValue Dst = MakeAddrLValue(emission.getAllocatedAddress(), type);
  if (emission.IsEscapingByRef)
    drillIntoBlockVariable(*this, Dst, &D);
  defaultInitNonTrivialCStructVar(Dst);
  return;
}

// Check whether this is a byref variable that's potentially
// captured and moved by its own initializer.  If so, we'll need to
// emit the initializer first, then copy into the variable.
bool capturedByInit =
    Init && emission.IsEscapingByRef && isCapturedBy(D, Init);

bool locIsByrefHeader = !capturedByInit;
const Address Loc =
    locIsByrefHeader ? emission.getObjectAddress(*this) : emission.Addr;

// Note: constexpr already initializes everything correctly.
LangOptions::TrivialAutoVarInitKind trivialAutoVarInit =
    (D.isConstexpr()
         ? LangOptions::TrivialAutoVarInitKind::Uninitialized
         : (D.getAttr<UninitializedAttr>()
                ? LangOptions::TrivialAutoVarInitKind::Uninitialized
                : getContext().getLangOpts().getTrivialAutoVarInit()));

auto initializeWhatIsTechnicallyUninitialized = [&](Address Loc) {
  if (trivialAutoVarInit ==
      LangOptions::TrivialAutoVarInitKind::Uninitialized)
    return;

  // Only initialize a __block's storage: we always initialize the header.
  if (emission.IsEscapingByRef && !locIsByrefHeader)
    Loc = emitBlockByrefAddress(Loc, &D, /*follow=*/false);

  return emitZeroOrPatternForAutoVarInit(type, D, Loc);
};

if (isTrivialInitializer(Init))
  return initializeWhatIsTechnicallyUninitialized(Loc);

llvm::Constant *constant = nullptr;
if (emission.IsConstantAggregate ||
    D.mightBeUsableInConstantExpressions(getContext())) {
  assert(!capturedByInit && "constant init contains a capturing block?")((!capturedByInit && "constant init contains a capturing block?"
) ? static_cast<void> (0) : __assert_fail ("!capturedByInit && \"constant init contains a capturing block?\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1813, __PRETTY_FUNCTION__));
  constant = ConstantEmitter(*this).tryEmitAbstractForInitializer(D);
  if (constant && !constant->isZeroValue() &&
      (trivialAutoVarInit !=
       LangOptions::TrivialAutoVarInitKind::Uninitialized)) {
    IsPattern isPattern =
        (trivialAutoVarInit == LangOptions::TrivialAutoVarInitKind::Pattern)
            ? IsPattern::Yes
            : IsPattern::No;
    // C guarantees that brace-init with fewer initializers than members in
    // the aggregate will initialize the rest of the aggregate as-if it were
    // static initialization. In turn static initialization guarantees that
    // padding is initialized to zero bits. We could instead pattern-init if D
    // has any ImplicitValueInitExpr, but that seems to be unintuitive
    // behavior.
    constant = constWithPadding(CGM, IsPattern::No,
                                replaceUndef(CGM, isPattern, constant));
  }
}

if (!constant) {
  initializeWhatIsTechnicallyUninitialized(Loc);
  LValue lv = MakeAddrLValue(Loc, type);
  lv.setNonGC(true);
  return EmitExprAsInit(Init, &D, lv, capturedByInit);
}

if (!emission.IsConstantAggregate) {
  // For simple scalar/complex initialization, store the value directly.
  LValue lv = MakeAddrLValue(Loc, type);
  lv.setNonGC(true);
  return EmitStoreThroughLValue(RValue::get(constant), lv, true);
}

llvm::Type *BP = CGM.Int8Ty->getPointerTo(Loc.getAddressSpace());
emitStoresForConstant(
    CGM, D, (Loc.getType() == BP) ? Loc : Builder.CreateBitCast(Loc, BP),
    type.isVolatileQualified(), Builder, constant);
1851}

1853/// Emit an expression as an initializer for an object (variable, field, etc.)
1854/// at the given location.  The expression is not necessarily the normal
1855/// initializer for the object, and the address is not necessarily
1856/// its normal location.
1857///
1858/// \param init the initializing expression
1859/// \param D the object to act as if we're initializing
1860/// \param loc the address to initialize; its type is a pointer
1861///   to the LLVM mapping of the object's type
1862/// \param alignment the alignment of the address
1863/// \param capturedByInit true if \p D is a __block variable
1864///   whose address is potentially changed by the initializer
1865void CodeGenFunction::EmitExprAsInit(const Expr *init, const ValueDecl *D,
                                   LValue lvalue, bool capturedByInit) {
QualType type = D->getType();

if (type->isReferenceType()) {
  RValue rvalue = EmitReferenceBindingToExpr(init);
  if (capturedByInit)
    drillIntoBlockVariable(*this, lvalue, cast<VarDecl>(D));
  EmitStoreThroughLValue(rvalue, lvalue, true);
  return;
}
switch (getEvaluationKind(type)) {
case TEK_Scalar:
  EmitScalarInit(init, D, lvalue, capturedByInit);
  return;
case TEK_Complex: {
  ComplexPairTy complex = EmitComplexExpr(init);
  if (capturedByInit)
    drillIntoBlockVariable(*this, lvalue, cast<VarDecl>(D));
  EmitStoreOfComplex(complex, lvalue, /*init*/ true);
  return;
}
case TEK_Aggregate:
  if (type->isAtomicType()) {
    EmitAtomicInit(const_cast<Expr*>(init), lvalue);
  } else {
    AggValueSlot::Overlap_t Overlap = AggValueSlot::MayOverlap;
    if (isa<VarDecl>(D))
      Overlap = AggValueSlot::DoesNotOverlap;
    else if (auto *FD = dyn_cast<FieldDecl>(D))
      Overlap = getOverlapForFieldInit(FD);
    // TODO: how can we delay here if D is captured by its initializer?
    EmitAggExpr(init, AggValueSlot::forLValue(lvalue,
                                            AggValueSlot::IsDestructed,
                                       AggValueSlot::DoesNotNeedGCBarriers,
                                            AggValueSlot::IsNotAliased,
                                            Overlap));
  }
  return;
}
llvm_unreachable("bad evaluation kind")::llvm::llvm_unreachable_internal("bad evaluation kind", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1905);
1906}

1908/// Enter a destroy cleanup for the given local variable.
1909void CodeGenFunction::emitAutoVarTypeCleanup(
                          const CodeGenFunction::AutoVarEmission &emission,
                          QualType::DestructionKind dtorKind) {
assert(dtorKind != QualType::DK_none)((dtorKind != QualType::DK_none) ? static_cast<void> (0
) : __assert_fail ("dtorKind != QualType::DK_none", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1912, __PRETTY_FUNCTION__));

// Note that for __block variables, we want to destroy the
// original stack object, not the possibly forwarded object.
Address addr = emission.getObjectAddress(*this);

const VarDecl *var = emission.Variable;
QualType type = var->getType();

CleanupKind cleanupKind = NormalAndEHCleanup;
CodeGenFunction::Destroyer *destroyer = nullptr;

switch (dtorKind) {
case QualType::DK_none:
  llvm_unreachable("no cleanup for trivially-destructible variable")::llvm::llvm_unreachable_internal("no cleanup for trivially-destructible variable"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1926);

case QualType::DK_cxx_destructor:
  // If there's an NRVO flag on the emission, we need a different
  // cleanup.
  if (emission.NRVOFlag) {
    assert(!type->isArrayType())((!type->isArrayType()) ? static_cast<void> (0) : __assert_fail
 ("!type->isArrayType()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1932, __PRETTY_FUNCTION__));
    CXXDestructorDecl *dtor = type->getAsCXXRecordDecl()->getDestructor();
    EHStack.pushCleanup<DestroyNRVOVariableCXX>(cleanupKind, addr, type, dtor,
                                                emission.NRVOFlag);
    return;
  }
  break;

case QualType::DK_objc_strong_lifetime:
  // Suppress cleanups for pseudo-strong variables.
  if (var->isARCPseudoStrong()) return;

  // Otherwise, consider whether to use an EH cleanup or not.
  cleanupKind = getARCCleanupKind();

  // Use the imprecise destroyer by default.
  if (!var->hasAttr<ObjCPreciseLifetimeAttr>())
    destroyer = CodeGenFunction::destroyARCStrongImprecise;
  break;

case QualType::DK_objc_weak_lifetime:
  break;

case QualType::DK_nontrivial_c_struct:
  destroyer = CodeGenFunction::destroyNonTrivialCStruct;
  if (emission.NRVOFlag) {
    assert(!type->isArrayType())((!type->isArrayType()) ? static_cast<void> (0) : __assert_fail
 ("!type->isArrayType()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1958, __PRETTY_FUNCTION__));
    EHStack.pushCleanup<DestroyNRVOVariableC>(cleanupKind, addr,
                                              emission.NRVOFlag, type);
    return;
  }
  break;
}

// If we haven't chosen a more specific destroyer, use the default.
if (!destroyer) destroyer = getDestroyer(dtorKind);

// Use an EH cleanup in array destructors iff the destructor itself
// is being pushed as an EH cleanup.
bool useEHCleanup = (cleanupKind & EHCleanup);
EHStack.pushCleanup<DestroyObject>(cleanupKind, addr, type, destroyer,
                                   useEHCleanup);
1974}

1976void CodeGenFunction::EmitAutoVarCleanups(const AutoVarEmission &emission) {
assert(emission.Variable && "emission was not valid!")((emission.Variable && "emission was not valid!") ? static_cast
<void> (0) : __assert_fail ("emission.Variable && \"emission was not valid!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 1977, __PRETTY_FUNCTION__));

// If this was emitted as a global constant, we're done.
if (emission.wasEmittedAsGlobal()) return;

// If we don't have an insertion point, we're done.  Sema prevents
// us from jumping into any of these scopes anyway.
if (!HaveInsertPoint()) return;

const VarDecl &D = *emission.Variable;

// Check the type for a cleanup.
if (QualType::DestructionKind dtorKind = D.needsDestruction(getContext()))
  emitAutoVarTypeCleanup(emission, dtorKind);

// In GC mode, honor objc_precise_lifetime.
if (getLangOpts().getGC() != LangOptions::NonGC &&
    D.hasAttr<ObjCPreciseLifetimeAttr>()) {
  EHStack.pushCleanup<ExtendGCLifetime>(NormalCleanup, &D);
}

// Handle the cleanup attribute.
if (const CleanupAttr *CA = D.getAttr<CleanupAttr>()) {
  const FunctionDecl *FD = CA->getFunctionDecl();

  llvm::Constant *F = CGM.GetAddrOfFunction(FD);
  assert(F && "Could not find function!")((F && "Could not find function!") ? static_cast<void
> (0) : __assert_fail ("F && \"Could not find function!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 2003, __PRETTY_FUNCTION__));

  const CGFunctionInfo &Info = CGM.getTypes().arrangeFunctionDeclaration(FD);
  EHStack.pushCleanup<CallCleanupFunction>(NormalAndEHCleanup, F, &Info, &D);
}

// If this is a block variable, call _Block_object_destroy
// (on the unforwarded address). Don't enter this cleanup if we're in pure-GC
// mode.
if (emission.IsEscapingByRef &&
    CGM.getLangOpts().getGC() != LangOptions::GCOnly) {
  BlockFieldFlags Flags = BLOCK_FIELD_IS_BYREF;
  if (emission.Variable->getType().isObjCGCWeak())
    Flags |= BLOCK_FIELD_IS_WEAK;
  enterByrefCleanup(NormalAndEHCleanup, emission.Addr, Flags,
                    /*LoadBlockVarAddr*/ false,
                    cxxDestructorCanThrow(emission.Variable->getType()));
}
2021}

2023CodeGenFunction::Destroyer *
2024CodeGenFunction::getDestroyer(QualType::DestructionKind kind) {
switch (kind) {
case QualType::DK_none: llvm_unreachable("no destroyer for trivial dtor")::llvm::llvm_unreachable_internal("no destroyer for trivial dtor"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 2026);
case QualType::DK_cxx_destructor:
  return destroyCXXObject;
case QualType::DK_objc_strong_lifetime:
  return destroyARCStrongPrecise;
case QualType::DK_objc_weak_lifetime:
  return destroyARCWeak;
case QualType::DK_nontrivial_c_struct:
  return destroyNonTrivialCStruct;
}
llvm_unreachable("Unknown DestructionKind")::llvm::llvm_unreachable_internal("Unknown DestructionKind", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 2036);
2037}

2039/// pushEHDestroy - Push the standard destructor for the given type as
2040/// an EH-only cleanup.
2041void CodeGenFunction::pushEHDestroy(QualType::DestructionKind dtorKind,
                                  Address addr, QualType type) {
assert(dtorKind && "cannot push destructor for trivial type")((dtorKind && "cannot push destructor for trivial type"
) ? static_cast<void> (0) : __assert_fail ("dtorKind && \"cannot push destructor for trivial type\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 2043, __PRETTY_FUNCTION__));
assert(needsEHCleanup(dtorKind))((needsEHCleanup(dtorKind)) ? static_cast<void> (0) : __assert_fail
 ("needsEHCleanup(dtorKind)", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 2044, __PRETTY_FUNCTION__));

pushDestroy(EHCleanup, addr, type, getDestroyer(dtorKind), true);
2047}

2049/// pushDestroy - Push the standard destructor for the given type as
2050/// at least a normal cleanup.
2051void CodeGenFunction::pushDestroy(QualType::DestructionKind dtorKind,
                                Address addr, QualType type) {
assert(dtorKind && "cannot push destructor for trivial type")((dtorKind && "cannot push destructor for trivial type"
) ? static_cast<void> (0) : __assert_fail ("dtorKind && \"cannot push destructor for trivial type\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 2053, __PRETTY_FUNCTION__));

CleanupKind cleanupKind = getCleanupKind(dtorKind);
pushDestroy(cleanupKind, addr, type, getDestroyer(dtorKind),
            cleanupKind & EHCleanup);
2058}

2060void CodeGenFunction::pushDestroy(CleanupKind cleanupKind, Address addr,
                                QualType type, Destroyer *destroyer,
                                bool useEHCleanupForArray) {
pushFullExprCleanup<DestroyObject>(cleanupKind, addr, type,
                                   destroyer, useEHCleanupForArray);
2065}

2067void CodeGenFunction::pushStackRestore(CleanupKind Kind, Address SPMem) {
EHStack.pushCleanup<CallStackRestore>(Kind, SPMem);
2069}

2071void CodeGenFunction::pushLifetimeExtendedDestroy(
  CleanupKind cleanupKind, Address addr, QualType type,
  Destroyer *destroyer, bool useEHCleanupForArray) {
// Push an EH-only cleanup for the object now.
// FIXME: When popping normal cleanups, we need to keep this EH cleanup
// around in case a temporary's destructor throws an exception.
if (cleanupKind & EHCleanup)
  EHStack.pushCleanup<DestroyObject>(
      static_cast<CleanupKind>(cleanupKind & ~NormalCleanup), addr, type,
      destroyer, useEHCleanupForArray);

// Remember that we need to push a full cleanup for the object at the
// end of the full-expression.
pushCleanupAfterFullExpr<DestroyObject>(
    cleanupKind, addr, type, destroyer, useEHCleanupForArray);
2086}

2088/// emitDestroy - Immediately perform the destruction of the given
2089/// object.
2090///
2091/// \param addr - the address of the object; a type*
2092/// \param type - the type of the object; if an array type, all
2093///   objects are destroyed in reverse order
2094/// \param destroyer - the function to call to destroy individual
2095///   elements
2096/// \param useEHCleanupForArray - whether an EH cleanup should be
2097///   used when destroying array elements, in case one of the
2098///   destructions throws an exception
2099void CodeGenFunction::emitDestroy(Address addr, QualType type,
                                Destroyer *destroyer,
                                bool useEHCleanupForArray) {
const ArrayType *arrayType = getContext().getAsArrayType(type);
if (!arrayType)
  return destroyer(*this, addr, type);

llvm::Value *length = emitArrayLength(arrayType, type, addr);

CharUnits elementAlign =
  addr.getAlignment()
      .alignmentOfArrayElement(getContext().getTypeSizeInChars(type));

// Normally we have to check whether the array is zero-length.
bool checkZeroLength = true;

// But if the array length is constant, we can suppress that.
if (llvm::ConstantInt *constLength = dyn_cast<llvm::ConstantInt>(length)) {
  // ...and if it's constant zero, we can just skip the entire thing.
  if (constLength->isZero()) return;
  checkZeroLength = false;
}

llvm::Value *begin = addr.getPointer();
llvm::Value *end = Builder.CreateInBoundsGEP(begin, length);
emitArrayDestroy(begin, end, type, elementAlign, destroyer,
                 checkZeroLength, useEHCleanupForArray);
2126}

2128/// emitArrayDestroy - Destroys all the elements of the given array,
2129/// beginning from last to first.  The array cannot be zero-length.
2130///
2131/// \param begin - a type* denoting the first element of the array
2132/// \param end - a type* denoting one past the end of the array
2133/// \param elementType - the element type of the array
2134/// \param destroyer - the function to call to destroy elements
2135/// \param useEHCleanup - whether to push an EH cleanup to destroy
2136///   the remaining elements in case the destruction of a single
2137///   element throws
2138void CodeGenFunction::emitArrayDestroy(llvm::Value *begin,
                                     llvm::Value *end,
                                     QualType elementType,
                                     CharUnits elementAlign,
                                     Destroyer *destroyer,
                                     bool checkZeroLength,
                                     bool useEHCleanup) {
assert(!elementType->isArrayType())((!elementType->isArrayType()) ? static_cast<void> (
0) : __assert_fail ("!elementType->isArrayType()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 2145, __PRETTY_FUNCTION__));

// The basic structure here is a do-while loop, because we don't
// need to check for the zero-element case.
llvm::BasicBlock *bodyBB = createBasicBlock("arraydestroy.body");
llvm::BasicBlock *doneBB = createBasicBlock("arraydestroy.done");

if (checkZeroLength) {
  llvm::Value *isEmpty = Builder.CreateICmpEQ(begin, end,
                                              "arraydestroy.isempty");
  Builder.CreateCondBr(isEmpty, doneBB, bodyBB);
}

// Enter the loop body, making that address the current address.
llvm::BasicBlock *entryBB = Builder.GetInsertBlock();
EmitBlock(bodyBB);
llvm::PHINode *elementPast =
  Builder.CreatePHI(begin->getType(), 2, "arraydestroy.elementPast");
elementPast->addIncoming(end, entryBB);

// Shift the address back by one element.
llvm::Value *negativeOne = llvm::ConstantInt::get(SizeTy, -1, true);
llvm::Value *element = Builder.CreateInBoundsGEP(elementPast, negativeOne,
                                                 "arraydestroy.element");

if (useEHCleanup)
  pushRegularPartialArrayCleanup(begin, element, elementType, elementAlign,
                                 destroyer);

// Perform the actual destruction there.
destroyer(*this, Address(element, elementAlign), elementType);

if (useEHCleanup)
  PopCleanupBlock();

// Check whether we've reached the end.
llvm::Value *done = Builder.CreateICmpEQ(element, begin, "arraydestroy.done");
Builder.CreateCondBr(done, doneBB, bodyBB);
elementPast->addIncoming(element, Builder.GetInsertBlock());

// Done.
EmitBlock(doneBB);
2187}

2189/// Perform partial array destruction as if in an EH cleanup.  Unlike
2190/// emitArrayDestroy, the element type here may still be an array type.
2191static void emitPartialArrayDestroy(CodeGenFunction &CGF,
                                  llvm::Value *begin, llvm::Value *end,
                                  QualType type, CharUnits elementAlign,
                                  CodeGenFunction::Destroyer *destroyer) {
// If the element type is itself an array, drill down.
unsigned arrayDepth = 0;
while (const ArrayType *arrayType = CGF.getContext().getAsArrayType(type)) {
  // VLAs don't require a GEP index to walk into.
  if (!isa<VariableArrayType>(arrayType))
    arrayDepth++;
  type = arrayType->getElementType();
}

if (arrayDepth) {
  llvm::Value *zero = llvm::ConstantInt::get(CGF.SizeTy, 0);

  SmallVector<llvm::Value*,4> gepIndices(arrayDepth+1, zero);
  begin = CGF.Builder.CreateInBoundsGEP(begin, gepIndices, "pad.arraybegin");
  end = CGF.Builder.CreateInBoundsGEP(end, gepIndices, "pad.arrayend");
}

// Destroy the array.  We don't ever need an EH cleanup because we
// assume that we're in an EH cleanup ourselves, so a throwing
// destructor causes an immediate terminate.
CGF.emitArrayDestroy(begin, end, type, elementAlign, destroyer,
                     /*checkZeroLength*/ true, /*useEHCleanup*/ false);
2217}

2219namespace {
/// RegularPartialArrayDestroy - a cleanup which performs a partial
/// array destroy where the end pointer is regularly determined and
/// does not need to be loaded from a local.
class RegularPartialArrayDestroy final : public EHScopeStack::Cleanup {
  llvm::Value *ArrayBegin;
  llvm::Value *ArrayEnd;
  QualType ElementType;
  CodeGenFunction::Destroyer *Destroyer;
  CharUnits ElementAlign;
public:
  RegularPartialArrayDestroy(llvm::Value *arrayBegin, llvm::Value *arrayEnd,
                             QualType elementType, CharUnits elementAlign,
                             CodeGenFunction::Destroyer *destroyer)
    : ArrayBegin(arrayBegin), ArrayEnd(arrayEnd),
      ElementType(elementType), Destroyer(destroyer),
      ElementAlign(elementAlign) {}

  void Emit(CodeGenFunction &CGF, Flags flags) override {
    emitPartialArrayDestroy(CGF, ArrayBegin, ArrayEnd,
                            ElementType, ElementAlign, Destroyer);
  }
};

/// IrregularPartialArrayDestroy - a cleanup which performs a
/// partial array destroy where the end pointer is irregularly
/// determined and must be loaded from a local.
class IrregularPartialArrayDestroy final : public EHScopeStack::Cleanup {
  llvm::Value *ArrayBegin;
  Address ArrayEndPointer;
  QualType ElementType;
  CodeGenFunction::Destroyer *Destroyer;
  CharUnits ElementAlign;
public:
  IrregularPartialArrayDestroy(llvm::Value *arrayBegin,
                               Address arrayEndPointer,
                               QualType elementType,
                               CharUnits elementAlign,
                               CodeGenFunction::Destroyer *destroyer)
    : ArrayBegin(arrayBegin), ArrayEndPointer(arrayEndPointer),
      ElementType(elementType), Destroyer(destroyer),
      ElementAlign(elementAlign) {}

  void Emit(CodeGenFunction &CGF, Flags flags) override {
    llvm::Value *arrayEnd = CGF.Builder.CreateLoad(ArrayEndPointer);
    emitPartialArrayDestroy(CGF, ArrayBegin, arrayEnd,
                            ElementType, ElementAlign, Destroyer);
  }
};
2268} // end anonymous namespace

2270/// pushIrregularPartialArrayCleanup - Push an EH cleanup to destroy
2271/// already-constructed elements of the given array.  The cleanup
2272/// may be popped with DeactivateCleanupBlock or PopCleanupBlock.
2273///
2274/// \param elementType - the immediate element type of the array;
2275///   possibly still an array type
2276void CodeGenFunction::pushIrregularPartialArrayCleanup(llvm::Value *arrayBegin,
                                                     Address arrayEndPointer,
                                                     QualType elementType,
                                                     CharUnits elementAlign,
                                                     Destroyer *destroyer) {
pushFullExprCleanup<IrregularPartialArrayDestroy>(EHCleanup,
                                                  arrayBegin, arrayEndPointer,
                                                  elementType, elementAlign,
                                                  destroyer);
2285}

2287/// pushRegularPartialArrayCleanup - Push an EH cleanup to destroy
2288/// already-constructed elements of the given array.  The cleanup
2289/// may be popped with DeactivateCleanupBlock or PopCleanupBlock.
2290///
2291/// \param elementType - the immediate element type of the array;
2292///   possibly still an array type
2293void CodeGenFunction::pushRegularPartialArrayCleanup(llvm::Value *arrayBegin,
                                                   llvm::Value *arrayEnd,
                                                   QualType elementType,
                                                   CharUnits elementAlign,
                                                   Destroyer *destroyer) {
pushFullExprCleanup<RegularPartialArrayDestroy>(EHCleanup,
                                                arrayBegin, arrayEnd,
                                                elementType, elementAlign,
                                                destroyer);
2302}

2304/// Lazily declare the @llvm.lifetime.start intrinsic.
2305llvm::Function *CodeGenModule::getLLVMLifetimeStartFn() {
if (LifetimeStartFn)
  return LifetimeStartFn;
LifetimeStartFn = llvm::Intrinsic::getDeclaration(&getModule(),
  llvm::Intrinsic::lifetime_start, AllocaInt8PtrTy);
return LifetimeStartFn;
2311}

2313/// Lazily declare the @llvm.lifetime.end intrinsic.
2314llvm::Function *CodeGenModule::getLLVMLifetimeEndFn() {
if (LifetimeEndFn)
  return LifetimeEndFn;
LifetimeEndFn = llvm::Intrinsic::getDeclaration(&getModule(),
  llvm::Intrinsic::lifetime_end, AllocaInt8PtrTy);
return LifetimeEndFn;
2320}

2322namespace {
/// A cleanup to perform a release of an object at the end of a
/// function.  This is used to balance out the incoming +1 of a
/// ns_consumed argument when we can't reasonably do that just by
/// not doing the initial retain for a __block argument.
struct ConsumeARCParameter final : EHScopeStack::Cleanup {
  ConsumeARCParameter(llvm::Value *param,
                      ARCPreciseLifetime_t precise)
    : Param(param), Precise(precise) {}

  llvm::Value *Param;
  ARCPreciseLifetime_t Precise;

  void Emit(CodeGenFunction &CGF, Flags flags) override {
    CGF.EmitARCRelease(Param, Precise);
  }
};
2339} // end anonymous namespace

2341/// Emit an alloca (or GlobalValue depending on target)
2342/// for the specified parameter and set up LocalDeclMap.
2343void CodeGenFunction::EmitParmDecl(const VarDecl &D, ParamValue Arg,
                                 unsigned ArgNo) {
// FIXME: Why isn't ImplicitParamDecl a ParmVarDecl?
assert((isa<ParmVarDecl>(D) || isa<ImplicitParamDecl>(D)) &&(((isa<ParmVarDecl>(D) || isa<ImplicitParamDecl>(
D)) && "Invalid argument to EmitParmDecl") ? static_cast
<void> (0) : __assert_fail ("(isa<ParmVarDecl>(D) || isa<ImplicitParamDecl>(D)) && \"Invalid argument to EmitParmDecl\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 2347, __PRETTY_FUNCTION__))
1
Assuming 'D' is not a 'ParmVarDecl'→
2
←
Assuming 'D' is a 'ImplicitParamDecl'→
3
←
'?' condition is true→
       "Invalid argument to EmitParmDecl")(((isa<ParmVarDecl>(D) || isa<ImplicitParamDecl>(
D)) && "Invalid argument to EmitParmDecl") ? static_cast
<void> (0) : __assert_fail ("(isa<ParmVarDecl>(D) || isa<ImplicitParamDecl>(D)) && \"Invalid argument to EmitParmDecl\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 2347, __PRETTY_FUNCTION__));

Arg.getAnyValue()->setName(D.getName());

QualType Ty = D.getType();

// Use better IR generation for certain implicit parameters.
if (auto IPD4.1
'IPD' is null
1
'IPD' is null
 = dyn_cast<ImplicitParamDecl>(&D)) {
4
←
Assuming the object is not a 'ImplicitParamDecl'→
5
←
Taking false branch→
  // The only implicit argument a block has is its literal.
  // This may be passed as an inalloca'ed value on Windows x86.
  if (BlockInfo) {
    llvm::Value *V = Arg.isIndirect()
                         ? Builder.CreateLoad(Arg.getIndirectAddress())
                         : Arg.getDirectValue();
    setBlockContextParameter(IPD, ArgNo, V);
    return;
  }
}

Address DeclPtr = Address::invalid();
bool DoStore = false;
bool IsScalar = hasScalarEvaluationKind(Ty);
// If we already have a pointer to the argument, reuse the input pointer.
if (Arg.isIndirect()) {
6
←
Calling 'ParamValue::isIndirect'→
9
←
Returning from 'ParamValue::isIndirect'→
10
←
Taking true branch→
  DeclPtr = Arg.getIndirectAddress();
  // If we have a prettier pointer type at this point, bitcast to that.
  unsigned AS = DeclPtr.getType()->getAddressSpace();
  llvm::Type *IRTy = ConvertTypeForMem(Ty)->getPointerTo(AS);
  if (DeclPtr.getType() != IRTy)
11
←
Assuming the condition is false→
12
←
Taking false branch→
    DeclPtr = Builder.CreateBitCast(DeclPtr, IRTy, D.getName());
  // Indirect argument is in alloca address space, which may be different
  // from the default address space.
  auto AllocaAS = CGM.getASTAllocaAddressSpace();
  auto *V = DeclPtr.getPointer();
  auto SrcLangAS = getLangOpts().OpenCL ? LangAS::opencl_private : AllocaAS;
13
←
Assuming field 'OpenCL' is not equal to 0→
14
←
'?' condition is true→
  auto DestLangAS =
      getLangOpts().OpenCL14.1
Field 'OpenCL' is not equal to 0
1
Field 'OpenCL' is not equal to 0
 ? LangAS::opencl_private : LangAS::Default;
15
←
'?' condition is true→
  if (SrcLangAS15.1
'SrcLangAS' is equal to 'DestLangAS'
1
'SrcLangAS' is equal to 'DestLangAS'
 != DestLangAS) {
16
←
Taking false branch→
    assert(getContext().getTargetAddressSpace(SrcLangAS) ==((getContext().getTargetAddressSpace(SrcLangAS) == CGM.getDataLayout
().getAllocaAddrSpace()) ? static_cast<void> (0) : __assert_fail
 ("getContext().getTargetAddressSpace(SrcLangAS) == CGM.getDataLayout().getAllocaAddrSpace()"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 2386, __PRETTY_FUNCTION__))
           CGM.getDataLayout().getAllocaAddrSpace())((getContext().getTargetAddressSpace(SrcLangAS) == CGM.getDataLayout
().getAllocaAddrSpace()) ? static_cast<void> (0) : __assert_fail
 ("getContext().getTargetAddressSpace(SrcLangAS) == CGM.getDataLayout().getAllocaAddrSpace()"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 2386, __PRETTY_FUNCTION__));
    auto DestAS = getContext().getTargetAddressSpace(DestLangAS);
    auto *T = V->getType()->getPointerElementType()->getPointerTo(DestAS);
    DeclPtr = Address(getTargetHooks().performAddrSpaceCast(
                          *this, V, SrcLangAS, DestLangAS, T, true),
                      DeclPtr.getAlignment());
  }

  // Push a destructor cleanup for this parameter if the ABI requires it.
  // Don't push a cleanup in a thunk for a method that will also emit a
  // cleanup.
  if (hasAggregateEvaluationKind(Ty) && !CurFuncIsThunk &&
17
←
Calling 'CodeGenFunction::hasAggregateEvaluationKind'→
20
←
Returning from 'CodeGenFunction::hasAggregateEvaluationKind'→
21
←
Assuming field 'CurFuncIsThunk' is false→
      Ty->getAs<RecordType>()->getDecl()->isParamDestroyedInCallee()) {
22
←
Assuming the object is not a 'RecordType'→
23
←
Called C++ object pointer is null
    if (QualType::DestructionKind DtorKind =
            D.needsDestruction(getContext())) {
      assert((DtorKind == QualType::DK_cxx_destructor ||(((DtorKind == QualType::DK_cxx_destructor || DtorKind == QualType
::DK_nontrivial_c_struct) && "unexpected destructor type"
) ? static_cast<void> (0) : __assert_fail ("(DtorKind == QualType::DK_cxx_destructor || DtorKind == QualType::DK_nontrivial_c_struct) && \"unexpected destructor type\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 2403, __PRETTY_FUNCTION__))
              DtorKind == QualType::DK_nontrivial_c_struct) &&(((DtorKind == QualType::DK_cxx_destructor || DtorKind == QualType
::DK_nontrivial_c_struct) && "unexpected destructor type"
) ? static_cast<void> (0) : __assert_fail ("(DtorKind == QualType::DK_cxx_destructor || DtorKind == QualType::DK_nontrivial_c_struct) && \"unexpected destructor type\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 2403, __PRETTY_FUNCTION__))
             "unexpected destructor type")(((DtorKind == QualType::DK_cxx_destructor || DtorKind == QualType
::DK_nontrivial_c_struct) && "unexpected destructor type"
) ? static_cast<void> (0) : __assert_fail ("(DtorKind == QualType::DK_cxx_destructor || DtorKind == QualType::DK_nontrivial_c_struct) && \"unexpected destructor type\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 2403, __PRETTY_FUNCTION__));
      pushDestroy(DtorKind, DeclPtr, Ty);
      CalleeDestructedParamCleanups[cast<ParmVarDecl>(&D)] =
          EHStack.stable_begin();
    }
  }
} else {
  // Check if the parameter address is controlled by OpenMP runtime.
  Address OpenMPLocalAddr =
      getLangOpts().OpenMP
          ? CGM.getOpenMPRuntime().getAddressOfLocalVariable(*this, &D)
          : Address::invalid();
  if (getLangOpts().OpenMP && OpenMPLocalAddr.isValid()) {
    DeclPtr = OpenMPLocalAddr;
  } else {
    // Otherwise, create a temporary to hold the value.
    DeclPtr = CreateMemTemp(Ty, getContext().getDeclAlign(&D),
                            D.getName() + ".addr");
  }
  DoStore = true;
}

llvm::Value *ArgVal = (DoStore ? Arg.getDirectValue() : nullptr);

LValue lv = MakeAddrLValue(DeclPtr, Ty);
if (IsScalar) {
  Qualifiers qs = Ty.getQualifiers();
  if (Qualifiers::ObjCLifetime lt = qs.getObjCLifetime()) {
    // We honor __attribute__((ns_consumed)) for types with lifetime.
    // For __strong, it's handled by just skipping the initial retain;
    // otherwise we have to balance out the initial +1 with an extra
    // cleanup to do the release at the end of the function.
    bool isConsumed = D.hasAttr<NSConsumedAttr>();

    // If a parameter is pseudo-strong then we can omit the implicit retain.
    if (D.isARCPseudoStrong()) {
      assert(lt == Qualifiers::OCL_Strong &&((lt == Qualifiers::OCL_Strong && "pseudo-strong variable isn't strong?"
) ? static_cast<void> (0) : __assert_fail ("lt == Qualifiers::OCL_Strong && \"pseudo-strong variable isn't strong?\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 2440, __PRETTY_FUNCTION__))
             "pseudo-strong variable isn't strong?")((lt == Qualifiers::OCL_Strong && "pseudo-strong variable isn't strong?"
) ? static_cast<void> (0) : __assert_fail ("lt == Qualifiers::OCL_Strong && \"pseudo-strong variable isn't strong?\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 2440, __PRETTY_FUNCTION__));
      assert(qs.hasConst() && "pseudo-strong variable should be const!")((qs.hasConst() && "pseudo-strong variable should be const!"
) ? static_cast<void> (0) : __assert_fail ("qs.hasConst() && \"pseudo-strong variable should be const!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CGDecl.cpp"
, 2441, __PRETTY_FUNCTION__));
      lt = Qualifiers::OCL_ExplicitNone;
    }

    // Load objects passed indirectly.
    if (Arg.isIndirect() && !ArgVal)
      ArgVal = Builder.CreateLoad(DeclPtr);

    if (lt == Qualifiers::OCL_Strong) {
      if (!isConsumed) {
        if (CGM.getCodeGenOpts().OptimizationLevel == 0) {
          // use objc_storeStrong(&dest, value) for retaining the
          // object. But first, store a null into 'dest' because
          // objc_storeStrong attempts to release its old value.
          llvm::Value *Null = CGM.EmitNullConstant(D.getType());
          EmitStoreOfScalar(Null, lv, /* isInitialization */ true);
          EmitARCStoreStrongCall(lv.getAddress(), ArgVal, true);
          DoStore = false;
        }
        else
        // Don't use objc_retainBlock for block pointers, because we
        // don't want to Block_copy something just because we got it
        // as a parameter.
          ArgVal = EmitARCRetainNonBlock(ArgVal);
      }
    } else {
      // Push the cleanup for a consumed parameter.
      if (isConsumed) {
        ARCPreciseLifetime_t precise = (D.hasAttr<ObjCPreciseLifetimeAttr>()
                              ? ARCPreciseLifetime : ARCImpreciseLifetime);
        EHStack.pushCleanup<ConsumeARCParameter>(getARCCleanupKind(), ArgVal,
                                                 precise);
      }

      if (lt == Qualifiers::OCL_Weak) {
        EmitARCInitWeak(DeclPtr, ArgVal);
        DoStore = false; // The weak init is a store, no need to do two.
      }
    }

    // Enter the cleanup scope.
    EmitAutoVarWithLifetime(*this, D, DeclPtr, lt);
  }
}

// Store the initial value into the alloca.
if (DoStore)
  EmitStoreOfScalar(ArgVal, lv, /* isInitialization */ true);

setAddrOfLocalVar(&D, DeclPtr);

// Emit debug info for param declarations in non-thunk functions.
if (CGDebugInfo *DI = getDebugInfo()) {
  if (CGM.getCodeGenOpts().getDebugInfo() >=
          codegenoptions::LimitedDebugInfo &&
      !CurFuncIsThunk) {
    DI->EmitDeclareOfArgVariable(&D, DeclPtr.getPointer(), ArgNo, Builder);
  }
}

if (D.hasAttr<AnnotateAttr>())
  EmitVarAnnotations(&D, DeclPtr.getPointer());

// We can only check return value nullability if all arguments to the
// function satisfy their nullability preconditions. This makes it necessary
// to emit null checks for args in the function body itself.
if (requiresReturnValueNullabilityCheck()) {
  auto Nullability = Ty->getNullability(getContext());
  if (Nullability && *Nullability == NullabilityKind::NonNull) {
    SanitizerScope SanScope(this);
    RetValNullabilityPrecondition =
        Builder.CreateAnd(RetValNullabilityPrecondition,
                          Builder.CreateIsNotNull(Arg.getAnyValue()));
  }
}
2516}

2518void CodeGenModule::EmitOMPDeclareReduction(const OMPDeclareReductionDecl *D,
                                          CodeGenFunction *CGF) {
if (!LangOpts.OpenMP || (!LangOpts.EmitAllDecls && !D->isUsed()))
  return;
getOpenMPRuntime().emitUserDefinedReduction(CGF, D);
2523}

2525void CodeGenModule::EmitOMPDeclareMapper(const OMPDeclareMapperDecl *D,
                                       CodeGenFunction *CGF) {
if (!LangOpts.OpenMP || LangOpts.OpenMPSimd ||
    (!LangOpts.EmitAllDecls && !D->isUsed()))
  return;
getOpenMPRuntime().emitUserDefinedMapper(D, CGF);
2531}

2533void CodeGenModule::EmitOMPRequiresDecl(const OMPRequiresDecl *D) {
getOpenMPRuntime().checkArchForUnifiedAddressing(D);
2535}

←

/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h

1//===-- CodeGenFunction.h - Per-Function state for LLVM CodeGen -*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This is the internal per-function state used for llvm translation.
10//
11//===----------------------------------------------------------------------===//

13#ifndef LLVM_CLANG_LIB_CODEGEN_CODEGENFUNCTION_H
14#define LLVM_CLANG_LIB_CODEGEN_CODEGENFUNCTION_H

16#include "CGBuilder.h"
17#include "CGDebugInfo.h"
18#include "CGLoopInfo.h"
19#include "CGValue.h"
20#include "CodeGenModule.h"
21#include "CodeGenPGO.h"
22#include "EHScopeStack.h"
23#include "VarBypassDetector.h"
24#include "clang/AST/CharUnits.h"
25#include "clang/AST/CurrentSourceLocExprScope.h"
26#include "clang/AST/ExprCXX.h"
27#include "clang/AST/ExprObjC.h"
28#include "clang/AST/ExprOpenMP.h"
29#include "clang/AST/Type.h"
30#include "clang/Basic/ABI.h"
31#include "clang/Basic/CapturedStmt.h"
32#include "clang/Basic/CodeGenOptions.h"
33#include "clang/Basic/OpenMPKinds.h"
34#include "clang/Basic/TargetInfo.h"
35#include "llvm/ADT/ArrayRef.h"
36#include "llvm/ADT/DenseMap.h"
37#include "llvm/ADT/MapVector.h"
38#include "llvm/ADT/SmallVector.h"
39#include "llvm/IR/ValueHandle.h"
40#include "llvm/Support/Debug.h"
41#include "llvm/Transforms/Utils/SanitizerStats.h"

43namespace llvm {
44class BasicBlock;
45class LLVMContext;
46class MDNode;
47class Module;
48class SwitchInst;
49class Twine;
50class Value;
51}

53namespace clang {
54class ASTContext;
55class BlockDecl;
56class CXXDestructorDecl;
57class CXXForRangeStmt;
58class CXXTryStmt;
59class Decl;
60class LabelDecl;
61class EnumConstantDecl;
62class FunctionDecl;
63class FunctionProtoType;
64class LabelStmt;
65class ObjCContainerDecl;
66class ObjCInterfaceDecl;
67class ObjCIvarDecl;
68class ObjCMethodDecl;
69class ObjCImplementationDecl;
70class ObjCPropertyImplDecl;
71class TargetInfo;
72class VarDecl;
73class ObjCForCollectionStmt;
74class ObjCAtTryStmt;
75class ObjCAtThrowStmt;
76class ObjCAtSynchronizedStmt;
77class ObjCAutoreleasePoolStmt;

79namespace analyze_os_log {
80class OSLogBufferLayout;
81}

83namespace CodeGen {
84class CodeGenTypes;
85class CGCallee;
86class CGFunctionInfo;
87class CGRecordLayout;
88class CGBlockInfo;
89class CGCXXABI;
90class BlockByrefHelpers;
91class BlockByrefInfo;
92class BlockFlags;
93class BlockFieldFlags;
94class RegionCodeGenTy;
95class TargetCodeGenInfo;
96struct OMPTaskDataTy;
97struct CGCoroData;

99/// The kind of evaluation to perform on values of a particular
100/// type.  Basically, is the code in CGExprScalar, CGExprComplex, or
101/// CGExprAgg?
102///
103/// TODO: should vectors maybe be split out into their own thing?
104enum TypeEvaluationKind {
TEK_Scalar,
TEK_Complex,
TEK_Aggregate
108};

110#define LIST_SANITIZER_CHECKSSANITIZER_CHECK(AddOverflow, add_overflow, 0) SANITIZER_CHECK
(BuiltinUnreachable, builtin_unreachable, 0) SANITIZER_CHECK(
CFICheckFail, cfi_check_fail, 0) SANITIZER_CHECK(DivremOverflow
, divrem_overflow, 0) SANITIZER_CHECK(DynamicTypeCacheMiss, dynamic_type_cache_miss
, 0) SANITIZER_CHECK(FloatCastOverflow, float_cast_overflow, 0
) SANITIZER_CHECK(FunctionTypeMismatch, function_type_mismatch
, 1) SANITIZER_CHECK(ImplicitConversion, implicit_conversion,
 0) SANITIZER_CHECK(InvalidBuiltin, invalid_builtin, 0) SANITIZER_CHECK
(LoadInvalidValue, load_invalid_value, 0) SANITIZER_CHECK(MissingReturn
, missing_return, 0) SANITIZER_CHECK(MulOverflow, mul_overflow
, 0) SANITIZER_CHECK(NegateOverflow, negate_overflow, 0) SANITIZER_CHECK
(NullabilityArg, nullability_arg, 0) SANITIZER_CHECK(NullabilityReturn
, nullability_return, 1) SANITIZER_CHECK(NonnullArg, nonnull_arg
, 0) SANITIZER_CHECK(NonnullReturn, nonnull_return, 1) SANITIZER_CHECK
(OutOfBounds, out_of_bounds, 0) SANITIZER_CHECK(PointerOverflow
, pointer_overflow, 0) SANITIZER_CHECK(ShiftOutOfBounds, shift_out_of_bounds
, 0) SANITIZER_CHECK(SubOverflow, sub_overflow, 0) SANITIZER_CHECK
(TypeMismatch, type_mismatch, 1) SANITIZER_CHECK(AlignmentAssumption
, alignment_assumption, 0) SANITIZER_CHECK(VLABoundNotPositive
, vla_bound_not_positive, 0)                                                  \
SANITIZER_CHECK(AddOverflow, add_overflow, 0)                                \
SANITIZER_CHECK(BuiltinUnreachable, builtin_unreachable, 0)                  \
SANITIZER_CHECK(CFICheckFail, cfi_check_fail, 0)                             \
SANITIZER_CHECK(DivremOverflow, divrem_overflow, 0)                          \
SANITIZER_CHECK(DynamicTypeCacheMiss, dynamic_type_cache_miss, 0)            \
SANITIZER_CHECK(FloatCastOverflow, float_cast_overflow, 0)                   \
SANITIZER_CHECK(FunctionTypeMismatch, function_type_mismatch, 1)             \
SANITIZER_CHECK(ImplicitConversion, implicit_conversion, 0)                  \
SANITIZER_CHECK(InvalidBuiltin, invalid_builtin, 0)                          \
SANITIZER_CHECK(LoadInvalidValue, load_invalid_value, 0)                     \
SANITIZER_CHECK(MissingReturn, missing_return, 0)                            \
SANITIZER_CHECK(MulOverflow, mul_overflow, 0)                                \
SANITIZER_CHECK(NegateOverflow, negate_overflow, 0)                          \
SANITIZER_CHECK(NullabilityArg, nullability_arg, 0)                          \
SANITIZER_CHECK(NullabilityReturn, nullability_return, 1)                    \
SANITIZER_CHECK(NonnullArg, nonnull_arg, 0)                                  \
SANITIZER_CHECK(NonnullReturn, nonnull_return, 1)                            \
SANITIZER_CHECK(OutOfBounds, out_of_bounds, 0)                               \
SANITIZER_CHECK(PointerOverflow, pointer_overflow, 0)                        \
SANITIZER_CHECK(ShiftOutOfBounds, shift_out_of_bounds, 0)                    \
SANITIZER_CHECK(SubOverflow, sub_overflow, 0)                                \
SANITIZER_CHECK(TypeMismatch, type_mismatch, 1)                              \
SANITIZER_CHECK(AlignmentAssumption, alignment_assumption, 0)                \
SANITIZER_CHECK(VLABoundNotPositive, vla_bound_not_positive, 0)

136enum SanitizerHandler {
137#define SANITIZER_CHECK(Enum, Name, Version) Enum,
LIST_SANITIZER_CHECKSSANITIZER_CHECK(AddOverflow, add_overflow, 0) SANITIZER_CHECK
(BuiltinUnreachable, builtin_unreachable, 0) SANITIZER_CHECK(
CFICheckFail, cfi_check_fail, 0) SANITIZER_CHECK(DivremOverflow
, divrem_overflow, 0) SANITIZER_CHECK(DynamicTypeCacheMiss, dynamic_type_cache_miss
, 0) SANITIZER_CHECK(FloatCastOverflow, float_cast_overflow, 0
) SANITIZER_CHECK(FunctionTypeMismatch, function_type_mismatch
, 1) SANITIZER_CHECK(ImplicitConversion, implicit_conversion,
 0) SANITIZER_CHECK(InvalidBuiltin, invalid_builtin, 0) SANITIZER_CHECK
(LoadInvalidValue, load_invalid_value, 0) SANITIZER_CHECK(MissingReturn
, missing_return, 0) SANITIZER_CHECK(MulOverflow, mul_overflow
, 0) SANITIZER_CHECK(NegateOverflow, negate_overflow, 0) SANITIZER_CHECK
(NullabilityArg, nullability_arg, 0) SANITIZER_CHECK(NullabilityReturn
, nullability_return, 1) SANITIZER_CHECK(NonnullArg, nonnull_arg
, 0) SANITIZER_CHECK(NonnullReturn, nonnull_return, 1) SANITIZER_CHECK
(OutOfBounds, out_of_bounds, 0) SANITIZER_CHECK(PointerOverflow
, pointer_overflow, 0) SANITIZER_CHECK(ShiftOutOfBounds, shift_out_of_bounds
, 0) SANITIZER_CHECK(SubOverflow, sub_overflow, 0) SANITIZER_CHECK
(TypeMismatch, type_mismatch, 1) SANITIZER_CHECK(AlignmentAssumption
, alignment_assumption, 0) SANITIZER_CHECK(VLABoundNotPositive
, vla_bound_not_positive, 0)
139#undef SANITIZER_CHECK
140};

142/// Helper class with most of the code for saving a value for a
143/// conditional expression cleanup.
144struct DominatingLLVMValue {
typedef llvm::PointerIntPair<llvm::Value*, 1, bool> saved_type;

/// Answer whether the given value needs extra work to be saved.
static bool needsSaving(llvm::Value *value) {
  // If it's not an instruction, we don't need to save.
  if (!isa<llvm::Instruction>(value)) return false;

  // If it's an instruction in the entry block, we don't need to save.
  llvm::BasicBlock *block = cast<llvm::Instruction>(value)->getParent();
  return (block != &block->getParent()->getEntryBlock());
}

static saved_type save(CodeGenFunction &CGF, llvm::Value *value);
static llvm::Value *restore(CodeGenFunction &CGF, saved_type value);
159};

161/// A partial specialization of DominatingValue for llvm::Values that
162/// might be llvm::Instructions.
163template <class T> struct DominatingPointer<T,true> : DominatingLLVMValue {
typedef T *type;
static type restore(CodeGenFunction &CGF, saved_type value) {
  return static_cast<T*>(DominatingLLVMValue::restore(CGF, value));
}
168};

170/// A specialization of DominatingValue for Address.
171template <> struct DominatingValue<Address> {
typedef Address type;

struct saved_type {
  DominatingLLVMValue::saved_type SavedValue;
  CharUnits Alignment;
};

static bool needsSaving(type value) {
  return DominatingLLVMValue::needsSaving(value.getPointer());
}
static saved_type save(CodeGenFunction &CGF, type value) {
  return { DominatingLLVMValue::save(CGF, value.getPointer()),
           value.getAlignment() };
}
static type restore(CodeGenFunction &CGF, saved_type value) {
  return Address(DominatingLLVMValue::restore(CGF, value.SavedValue),
                 value.Alignment);
}
190};

192/// A specialization of DominatingValue for RValue.
193template <> struct DominatingValue<RValue> {
typedef RValue type;
class saved_type {
  enum Kind { ScalarLiteral, ScalarAddress, AggregateLiteral,
              AggregateAddress, ComplexAddress };

  llvm::Value *Value;
  unsigned K : 3;
  unsigned Align : 29;
  saved_type(llvm::Value *v, Kind k, unsigned a = 0)
    : Value(v), K(k), Align(a) {}

public:
  static bool needsSaving(RValue value);
  static saved_type save(CodeGenFunction &CGF, RValue value);
  RValue restore(CodeGenFunction &CGF);

  // implementations in CGCleanup.cpp
};

static bool needsSaving(type value) {
  return saved_type::needsSaving(value);
}
static saved_type save(CodeGenFunction &CGF, type value) {
  return saved_type::save(CGF, value);
}
static type restore(CodeGenFunction &CGF, saved_type value) {
  return value.restore(CGF);
}
222};

224/// CodeGenFunction - This class organizes the per-function state that is used
225/// while generating LLVM code.
226class CodeGenFunction : public CodeGenTypeCache {
CodeGenFunction(const CodeGenFunction &) = delete;
void operator=(const CodeGenFunction &) = delete;

friend class CGCXXABI;
231public:
/// A jump destination is an abstract label, branching to which may
/// require a jump out through normal cleanups.
struct JumpDest {
  JumpDest() : Block(nullptr), ScopeDepth(), Index(0) {}
  JumpDest(llvm::BasicBlock *Block,
           EHScopeStack::stable_iterator Depth,
           unsigned Index)
    : Block(Block), ScopeDepth(Depth), Index(Index) {}

  bool isValid() const { return Block != nullptr; }
  llvm::BasicBlock *getBlock() const { return Block; }
  EHScopeStack::stable_iterator getScopeDepth() const { return ScopeDepth; }
  unsigned getDestIndex() const { return Index; }

  // This should be used cautiously.
  void setScopeDepth(EHScopeStack::stable_iterator depth) {
    ScopeDepth = depth;
  }

private:
  llvm::BasicBlock *Block;
  EHScopeStack::stable_iterator ScopeDepth;
  unsigned Index;
};

CodeGenModule &CGM;  // Per-module state.
const TargetInfo &Target;

typedef std::pair<llvm::Value *, llvm::Value *> ComplexPairTy;
LoopInfoStack LoopStack;
CGBuilderTy Builder;

// Stores variables for which we can't generate correct lifetime markers
// because of jumps.
VarBypassDetector Bypasses;

// CodeGen lambda for loops and support for ordered clause
typedef llvm::function_ref<void(CodeGenFunction &, const OMPLoopDirective &,
                                JumpDest)>
    CodeGenLoopTy;
typedef llvm::function_ref<void(CodeGenFunction &, SourceLocation,
                                const unsigned, const bool)>
    CodeGenOrderedTy;

// Codegen lambda for loop bounds in worksharing loop constructs
typedef llvm::function_ref<std::pair<LValue, LValue>(
    CodeGenFunction &, const OMPExecutableDirective &S)>
    CodeGenLoopBoundsTy;

// Codegen lambda for loop bounds in dispatch-based loop implementation
typedef llvm::function_ref<std::pair<llvm::Value *, llvm::Value *>(
    CodeGenFunction &, const OMPExecutableDirective &S, Address LB,
    Address UB)>
    CodeGenDispatchBoundsTy;

/// CGBuilder insert helper. This function is called after an
/// instruction is created using Builder.
void InsertHelper(llvm::Instruction *I, const llvm::Twine &Name,
                  llvm::BasicBlock *BB,
                  llvm::BasicBlock::iterator InsertPt) const;

/// CurFuncDecl - Holds the Decl for the current outermost
/// non-closure context.
const Decl *CurFuncDecl;
/// CurCodeDecl - This is the inner-most code context, which includes blocks.
const Decl *CurCodeDecl;
const CGFunctionInfo *CurFnInfo;
QualType FnRetTy;
llvm::Function *CurFn = nullptr;

// Holds coroutine data if the current function is a coroutine. We use a
// wrapper to manage its lifetime, so that we don't have to define CGCoroData
// in this header.
struct CGCoroInfo {
  std::unique_ptr<CGCoroData> Data;
  CGCoroInfo();
  ~CGCoroInfo();
};
CGCoroInfo CurCoro;

bool isCoroutine() const {
  return CurCoro.Data != nullptr;
}

/// CurGD - The GlobalDecl for the current function being compiled.
GlobalDecl CurGD;

/// PrologueCleanupDepth - The cleanup depth enclosing all the
/// cleanups associated with the parameters.
EHScopeStack::stable_iterator PrologueCleanupDepth;

/// ReturnBlock - Unified return block.
JumpDest ReturnBlock;

/// ReturnValue - The temporary alloca to hold the return
/// value. This is invalid iff the function has no return value.
Address ReturnValue = Address::invalid();

/// ReturnValuePointer - The temporary alloca to hold a pointer to sret.
/// This is invalid if sret is not in use.
Address ReturnValuePointer = Address::invalid();

/// Return true if a label was seen in the current scope.
bool hasLabelBeenSeenInCurrentScope() const {
  if (CurLexicalScope)
    return CurLexicalScope->hasLabels();
  return !LabelMap.empty();
}

/// AllocaInsertPoint - This is an instruction in the entry block before which
/// we prefer to insert allocas.
llvm::AssertingVH<llvm::Instruction> AllocaInsertPt;

/// API for captured statement code generation.
class CGCapturedStmtInfo {
public:
  explicit CGCapturedStmtInfo(CapturedRegionKind K = CR_Default)
      : Kind(K), ThisValue(nullptr), CXXThisFieldDecl(nullptr) {}
  explicit CGCapturedStmtInfo(const CapturedStmt &S,
                              CapturedRegionKind K = CR_Default)
    : Kind(K), ThisValue(nullptr), CXXThisFieldDecl(nullptr) {

    RecordDecl::field_iterator Field =
      S.getCapturedRecordDecl()->field_begin();
    for (CapturedStmt::const_capture_iterator I = S.capture_begin(),
                                              E = S.capture_end();
         I != E; ++I, ++Field) {
      if (I->capturesThis())
        CXXThisFieldDecl = *Field;
      else if (I->capturesVariable())
        CaptureFields[I->getCapturedVar()->getCanonicalDecl()] = *Field;
      else if (I->capturesVariableByCopy())
        CaptureFields[I->getCapturedVar()->getCanonicalDecl()] = *Field;
    }
  }

  virtual ~CGCapturedStmtInfo();

  CapturedRegionKind getKind() const { return Kind; }

  virtual void setContextValue(llvm::Value *V) { ThisValue = V; }
  // Retrieve the value of the context parameter.
  virtual llvm::Value *getContextValue() const { return ThisValue; }

  /// Lookup the captured field decl for a variable.
  virtual const FieldDecl *lookup(const VarDecl *VD) const {
    return CaptureFields.lookup(VD->getCanonicalDecl());
  }

  bool isCXXThisExprCaptured() const { return getThisFieldDecl() != nullptr; }
  virtual FieldDecl *getThisFieldDecl() const { return CXXThisFieldDecl; }

  static bool classof(const CGCapturedStmtInfo *) {
    return true;
  }

  /// Emit the captured statement body.
  virtual void EmitBody(CodeGenFunction &CGF, const Stmt *S) {
    CGF.incrementProfileCounter(S);
    CGF.EmitStmt(S);
  }

  /// Get the name of the capture helper.
  virtual StringRef getHelperName() const { return "__captured_stmt"; }

private:
  /// The kind of captured statement being generated.
  CapturedRegionKind Kind;

  /// Keep the map between VarDecl and FieldDecl.
  llvm::SmallDenseMap<const VarDecl *, FieldDecl *> CaptureFields;

  /// The base address of the captured record, passed in as the first
  /// argument of the parallel region function.
  llvm::Value *ThisValue;

  /// Captured 'this' type.
  FieldDecl *CXXThisFieldDecl;
};
CGCapturedStmtInfo *CapturedStmtInfo = nullptr;

/// RAII for correct setting/restoring of CapturedStmtInfo.
class CGCapturedStmtRAII {
private:
  CodeGenFunction &CGF;
  CGCapturedStmtInfo *PrevCapturedStmtInfo;
public:
  CGCapturedStmtRAII(CodeGenFunction &CGF,
                     CGCapturedStmtInfo *NewCapturedStmtInfo)
      : CGF(CGF), PrevCapturedStmtInfo(CGF.CapturedStmtInfo) {
    CGF.CapturedStmtInfo = NewCapturedStmtInfo;
  }
  ~CGCapturedStmtRAII() { CGF.CapturedStmtInfo = PrevCapturedStmtInfo; }
};

/// An abstract representation of regular/ObjC call/message targets.
class AbstractCallee {
  /// The function declaration of the callee.
  const Decl *CalleeDecl;

public:
  AbstractCallee() : CalleeDecl(nullptr) {}
  AbstractCallee(const FunctionDecl *FD) : CalleeDecl(FD) {}
  AbstractCallee(const ObjCMethodDecl *OMD) : CalleeDecl(OMD) {}
  bool hasFunctionDecl() const {
    return dyn_cast_or_null<FunctionDecl>(CalleeDecl);
  }
  const Decl *getDecl() const { return CalleeDecl; }
  unsigned getNumParams() const {
    if (const auto *FD = dyn_cast<FunctionDecl>(CalleeDecl))
      return FD->getNumParams();
    return cast<ObjCMethodDecl>(CalleeDecl)->param_size();
  }
  const ParmVarDecl *getParamDecl(unsigned I) const {
    if (const auto *FD = dyn_cast<FunctionDecl>(CalleeDecl))
      return FD->getParamDecl(I);
    return *(cast<ObjCMethodDecl>(CalleeDecl)->param_begin() + I);
  }
};

/// Sanitizers enabled for this function.
SanitizerSet SanOpts;

/// True if CodeGen currently emits code implementing sanitizer checks.
bool IsSanitizerScope = false;

/// RAII object to set/unset CodeGenFunction::IsSanitizerScope.
class SanitizerScope {
  CodeGenFunction *CGF;
public:
  SanitizerScope(CodeGenFunction *CGF);
  ~SanitizerScope();
};

/// In C++, whether we are code generating a thunk.  This controls whether we
/// should emit cleanups.
bool CurFuncIsThunk = false;

/// In ARC, whether we should autorelease the return value.
bool AutoreleaseResult = false;

/// Whether we processed a Microsoft-style asm block during CodeGen. These can
/// potentially set the return value.
bool SawAsmBlock = false;

const NamedDecl *CurSEHParent = nullptr;

/// True if the current function is an outlined SEH helper. This can be a
/// finally block or filter expression.
bool IsOutlinedSEHHelper = false;

/// True if CodeGen currently emits code inside presereved access index
/// region.
bool IsInPreservedAIRegion = false;

const CodeGen::CGBlockInfo *BlockInfo = nullptr;
llvm::Value *BlockPointer = nullptr;

llvm::DenseMap<const VarDecl *, FieldDecl *> LambdaCaptureFields;
FieldDecl *LambdaThisCaptureField = nullptr;

/// A mapping from NRVO variables to the flags used to indicate
/// when the NRVO has been applied to this variable.
llvm::DenseMap<const VarDecl *, llvm::Value *> NRVOFlags;

EHScopeStack EHStack;
llvm::SmallVector<char, 256> LifetimeExtendedCleanupStack;
llvm::SmallVector<const JumpDest *, 2> SEHTryEpilogueStack;

llvm::Instruction *CurrentFuncletPad = nullptr;

class CallLifetimeEnd final : public EHScopeStack::Cleanup {
  llvm::Value *Addr;
  llvm::Value *Size;

public:
  CallLifetimeEnd(Address addr, llvm::Value *size)
      : Addr(addr.getPointer()), Size(size) {}

  void Emit(CodeGenFunction &CGF, Flags flags) override {
    CGF.EmitLifetimeEnd(Size, Addr);
  }
};

/// Header for data within LifetimeExtendedCleanupStack.
struct LifetimeExtendedCleanupHeader {
  /// The size of the following cleanup object.
  unsigned Size;
  /// The kind of cleanup to push: a value from the CleanupKind enumeration.
  unsigned Kind : 31;
  /// Whether this is a conditional cleanup.
  unsigned IsConditional : 1;

  size_t getSize() const { return Size; }
  CleanupKind getKind() const { return (CleanupKind)Kind; }
  bool isConditional() const { return IsConditional; }
};

/// i32s containing the indexes of the cleanup destinations.
Address NormalCleanupDest = Address::invalid();

unsigned NextCleanupDestIndex = 1;

/// FirstBlockInfo - The head of a singly-linked-list of block layouts.
CGBlockInfo *FirstBlockInfo = nullptr;

/// EHResumeBlock - Unified block containing a call to llvm.eh.resume.
llvm::BasicBlock *EHResumeBlock = nullptr;

/// The exception slot.  All landing pads write the current exception pointer
/// into this alloca.
llvm::Value *ExceptionSlot = nullptr;

/// The selector slot.  Under the MandatoryCleanup model, all landing pads
/// write the current selector value into this alloca.
llvm::AllocaInst *EHSelectorSlot = nullptr;

/// A stack of exception code slots. Entering an __except block pushes a slot
/// on the stack and leaving pops one. The __exception_code() intrinsic loads
/// a value from the top of the stack.
SmallVector<Address, 1> SEHCodeSlotStack;

/// Value returned by __exception_info intrinsic.
llvm::Value *SEHInfo = nullptr;

/// Emits a landing pad for the current EH stack.
llvm::BasicBlock *EmitLandingPad();

llvm::BasicBlock *getInvokeDestImpl();

template <class T>
typename DominatingValue<T>::saved_type saveValueInCond(T value) {
  return DominatingValue<T>::save(*this, value);
}

567public:
/// ObjCEHValueStack - Stack of Objective-C exception values, used for
/// rethrows.
SmallVector<llvm::Value*, 8> ObjCEHValueStack;

/// A class controlling the emission of a finally block.
class FinallyInfo {
  /// Where the catchall's edge through the cleanup should go.
  JumpDest RethrowDest;

  /// A function to call to enter the catch.
  llvm::FunctionCallee BeginCatchFn;

  /// An i1 variable indicating whether or not the @finally is
  /// running for an exception.
  llvm::AllocaInst *ForEHVar;

  /// An i8* variable into which the exception pointer to rethrow
  /// has been saved.
  llvm::AllocaInst *SavedExnVar;

public:
  void enter(CodeGenFunction &CGF, const Stmt *Finally,
             llvm::FunctionCallee beginCatchFn,
             llvm::FunctionCallee endCatchFn, llvm::FunctionCallee rethrowFn);
  void exit(CodeGenFunction &CGF);
};

/// Returns true inside SEH __try blocks.
bool isSEHTryScope() const { return !SEHTryEpilogueStack.empty(); }

/// Returns true while emitting a cleanuppad.
bool isCleanupPadScope() const {
  return CurrentFuncletPad && isa<llvm::CleanupPadInst>(CurrentFuncletPad);
}

/// pushFullExprCleanup - Push a cleanup to be run at the end of the
/// current full-expression.  Safe against the possibility that
/// we're currently inside a conditionally-evaluated expression.
template <class T, class... As>
void pushFullExprCleanup(CleanupKind kind, As... A) {
  // If we're not in a conditional branch, or if none of the
  // arguments requires saving, then use the unconditional cleanup.
  if (!isInConditionalBranch())
    return EHStack.pushCleanup<T>(kind, A...);

  // Stash values in a tuple so we can guarantee the order of saves.
  typedef std::tuple<typename DominatingValue<As>::saved_type...> SavedTuple;
  SavedTuple Saved{saveValueInCond(A)...};

  typedef EHScopeStack::ConditionalCleanup<T, As...> CleanupType;
  EHStack.pushCleanupTuple<CleanupType>(kind, Saved);
  initFullExprCleanup();
}

/// Queue a cleanup to be pushed after finishing the current
/// full-expression.
template <class T, class... As>
void pushCleanupAfterFullExpr(CleanupKind Kind, As... A) {
  if (!isInConditionalBranch())
    return pushCleanupAfterFullExprImpl<T>(Kind, Address::invalid(), A...);

  Address ActiveFlag = createCleanupActiveFlag();
  assert(!DominatingValue<Address>::needsSaving(ActiveFlag) &&((!DominatingValue<Address>::needsSaving(ActiveFlag) &&
 "cleanup active flag should never need saving") ? static_cast
<void> (0) : __assert_fail ("!DominatingValue<Address>::needsSaving(ActiveFlag) && \"cleanup active flag should never need saving\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 631, __PRETTY_FUNCTION__))
         "cleanup active flag should never need saving")((!DominatingValue<Address>::needsSaving(ActiveFlag) &&
 "cleanup active flag should never need saving") ? static_cast
<void> (0) : __assert_fail ("!DominatingValue<Address>::needsSaving(ActiveFlag) && \"cleanup active flag should never need saving\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 631, __PRETTY_FUNCTION__));

  typedef std::tuple<typename DominatingValue<As>::saved_type...> SavedTuple;
  SavedTuple Saved{saveValueInCond(A)...};

  typedef EHScopeStack::ConditionalCleanup<T, As...> CleanupType;
  pushCleanupAfterFullExprImpl<CleanupType>(Kind, ActiveFlag, Saved);
}

template <class T, class... As>
void pushCleanupAfterFullExprImpl(CleanupKind Kind, Address ActiveFlag,
                                  As... A) {
  LifetimeExtendedCleanupHeader Header = {sizeof(T), Kind,
                                          ActiveFlag.isValid()};

  size_t OldSize = LifetimeExtendedCleanupStack.size();
  LifetimeExtendedCleanupStack.resize(
      LifetimeExtendedCleanupStack.size() + sizeof(Header) + Header.Size +
      (Header.IsConditional ? sizeof(ActiveFlag) : 0));

  static_assert(sizeof(Header) % alignof(T) == 0,
                "Cleanup will be allocated on misaligned address");
  char *Buffer = &LifetimeExtendedCleanupStack[OldSize];
  new (Buffer) LifetimeExtendedCleanupHeader(Header);
  new (Buffer + sizeof(Header)) T(A...);
  if (Header.IsConditional)
    new (Buffer + sizeof(Header) + sizeof(T)) Address(ActiveFlag);
}

/// Set up the last cleanup that was pushed as a conditional
/// full-expression cleanup.
void initFullExprCleanup() {
  initFullExprCleanupWithFlag(createCleanupActiveFlag());
}

void initFullExprCleanupWithFlag(Address ActiveFlag);
Address createCleanupActiveFlag();

/// PushDestructorCleanup - Push a cleanup to call the
/// complete-object destructor of an object of the given type at the
/// given address.  Does nothing if T is not a C++ class type with a
/// non-trivial destructor.
void PushDestructorCleanup(QualType T, Address Addr);

/// PushDestructorCleanup - Push a cleanup to call the
/// complete-object variant of the given destructor on the object at
/// the given address.
void PushDestructorCleanup(const CXXDestructorDecl *Dtor, QualType T,
                           Address Addr);

/// PopCleanupBlock - Will pop the cleanup entry on the stack and
/// process all branch fixups.
void PopCleanupBlock(bool FallThroughIsBranchThrough = false);

/// DeactivateCleanupBlock - Deactivates the given cleanup block.
/// The block cannot be reactivated.  Pops it if it's the top of the
/// stack.
///
/// \param DominatingIP - An instruction which is known to
///   dominate the current IP (if set) and which lies along
///   all paths of execution between the current IP and the
///   the point at which the cleanup comes into scope.
void DeactivateCleanupBlock(EHScopeStack::stable_iterator Cleanup,
                            llvm::Instruction *DominatingIP);

/// ActivateCleanupBlock - Activates an initially-inactive cleanup.
/// Cannot be used to resurrect a deactivated cleanup.
///
/// \param DominatingIP - An instruction which is known to
///   dominate the current IP (if set) and which lies along
///   all paths of execution between the current IP and the
///   the point at which the cleanup comes into scope.
void ActivateCleanupBlock(EHScopeStack::stable_iterator Cleanup,
                          llvm::Instruction *DominatingIP);

/// Enters a new scope for capturing cleanups, all of which
/// will be executed once the scope is exited.
class RunCleanupsScope {
  EHScopeStack::stable_iterator CleanupStackDepth, OldCleanupScopeDepth;
  size_t LifetimeExtendedCleanupStackSize;
  bool OldDidCallStackSave;
protected:
  bool PerformCleanup;
private:

  RunCleanupsScope(const RunCleanupsScope &) = delete;
  void operator=(const RunCleanupsScope &) = delete;

protected:
  CodeGenFunction& CGF;

public:
  /// Enter a new cleanup scope.
  explicit RunCleanupsScope(CodeGenFunction &CGF)
    : PerformCleanup(true), CGF(CGF)
  {
    CleanupStackDepth = CGF.EHStack.stable_begin();
    LifetimeExtendedCleanupStackSize =
        CGF.LifetimeExtendedCleanupStack.size();
    OldDidCallStackSave = CGF.DidCallStackSave;
    CGF.DidCallStackSave = false;
    OldCleanupScopeDepth = CGF.CurrentCleanupScopeDepth;
    CGF.CurrentCleanupScopeDepth = CleanupStackDepth;
  }

  /// Exit this cleanup scope, emitting any accumulated cleanups.
  ~RunCleanupsScope() {
    if (PerformCleanup)
      ForceCleanup();
  }

  /// Determine whether this scope requires any cleanups.
  bool requiresCleanups() const {
    return CGF.EHStack.stable_begin() != CleanupStackDepth;
  }

  /// Force the emission of cleanups now, instead of waiting
  /// until this object is destroyed.
  /// \param ValuesToReload - A list of values that need to be available at
  /// the insertion point after cleanup emission. If cleanup emission created
  /// a shared cleanup block, these value pointers will be rewritten.
  /// Otherwise, they not will be modified.
  void ForceCleanup(std::initializer_list<llvm::Value**> ValuesToReload = {}) {
    assert(PerformCleanup && "Already forced cleanup")((PerformCleanup && "Already forced cleanup") ? static_cast
<void> (0) : __assert_fail ("PerformCleanup && \"Already forced cleanup\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 754, __PRETTY_FUNCTION__));
    CGF.DidCallStackSave = OldDidCallStackSave;
    CGF.PopCleanupBlocks(CleanupStackDepth, LifetimeExtendedCleanupStackSize,
                         ValuesToReload);
    PerformCleanup = false;
    CGF.CurrentCleanupScopeDepth = OldCleanupScopeDepth;
  }
};

// Cleanup stack depth of the RunCleanupsScope that was pushed most recently.
EHScopeStack::stable_iterator CurrentCleanupScopeDepth =
    EHScopeStack::stable_end();

class LexicalScope : public RunCleanupsScope {
  SourceRange Range;
  SmallVector<const LabelDecl*, 4> Labels;
  LexicalScope *ParentScope;

  LexicalScope(const LexicalScope &) = delete;
  void operator=(const LexicalScope &) = delete;

public:
  /// Enter a new cleanup scope.
  explicit LexicalScope(CodeGenFunction &CGF, SourceRange Range)
    : RunCleanupsScope(CGF), Range(Range), ParentScope(CGF.CurLexicalScope) {
    CGF.CurLexicalScope = this;
    if (CGDebugInfo *DI = CGF.getDebugInfo())
      DI->EmitLexicalBlockStart(CGF.Builder, Range.getBegin());
  }

  void addLabel(const LabelDecl *label) {
    assert(PerformCleanup && "adding label to dead scope?")((PerformCleanup && "adding label to dead scope?") ? static_cast
<void> (0) : __assert_fail ("PerformCleanup && \"adding label to dead scope?\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 785, __PRETTY_FUNCTION__));
    Labels.push_back(label);
  }

  /// Exit this cleanup scope, emitting any accumulated
  /// cleanups.
  ~LexicalScope() {
    if (CGDebugInfo *DI = CGF.getDebugInfo())
      DI->EmitLexicalBlockEnd(CGF.Builder, Range.getEnd());

    // If we should perform a cleanup, force them now.  Note that
    // this ends the cleanup scope before rescoping any labels.
    if (PerformCleanup) {
      ApplyDebugLocation DL(CGF, Range.getEnd());
      ForceCleanup();
    }
  }

  /// Force the emission of cleanups now, instead of waiting
  /// until this object is destroyed.
  void ForceCleanup() {
    CGF.CurLexicalScope = ParentScope;
    RunCleanupsScope::ForceCleanup();

    if (!Labels.empty())
      rescopeLabels();
  }

  bool hasLabels() const {
    return !Labels.empty();
  }

  void rescopeLabels();
};

typedef llvm::DenseMap<const Decl *, Address> DeclMapTy;

/// The class used to assign some variables some temporarily addresses.
class OMPMapVars {
  DeclMapTy SavedLocals;
  DeclMapTy SavedTempAddresses;
  OMPMapVars(const OMPMapVars &) = delete;
  void operator=(const OMPMapVars &) = delete;

public:
  explicit OMPMapVars() = default;
  ~OMPMapVars() {
    assert(SavedLocals.empty() && "Did not restored original addresses.")((SavedLocals.empty() && "Did not restored original addresses."
) ? static_cast<void> (0) : __assert_fail ("SavedLocals.empty() && \"Did not restored original addresses.\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 832, __PRETTY_FUNCTION__));
  };

  /// Sets the address of the variable \p LocalVD to be \p TempAddr in
  /// function \p CGF.
  /// \return true if at least one variable was set already, false otherwise.
  bool setVarAddr(CodeGenFunction &CGF, const VarDecl *LocalVD,
                  Address TempAddr) {
    LocalVD = LocalVD->getCanonicalDecl();
    // Only save it once.
    if (SavedLocals.count(LocalVD)) return false;

    // Copy the existing local entry to SavedLocals.
    auto it = CGF.LocalDeclMap.find(LocalVD);
    if (it != CGF.LocalDeclMap.end())
      SavedLocals.try_emplace(LocalVD, it->second);
    else
      SavedLocals.try_emplace(LocalVD, Address::invalid());

    // Generate the private entry.
    QualType VarTy = LocalVD->getType();
    if (VarTy->isReferenceType()) {
      Address Temp = CGF.CreateMemTemp(VarTy);
      CGF.Builder.CreateStore(TempAddr.getPointer(), Temp);
      TempAddr = Temp;
    }
    SavedTempAddresses.try_emplace(LocalVD, TempAddr);

    return true;
  }

  /// Applies new addresses to the list of the variables.
  /// \return true if at least one variable is using new address, false
  /// otherwise.
  bool apply(CodeGenFunction &CGF) {
    copyInto(SavedTempAddresses, CGF.LocalDeclMap);
    SavedTempAddresses.clear();
    return !SavedLocals.empty();
  }

  /// Restores original addresses of the variables.
  void restore(CodeGenFunction &CGF) {
    if (!SavedLocals.empty()) {
      copyInto(SavedLocals, CGF.LocalDeclMap);
      SavedLocals.clear();
    }
  }

private:
  /// Copy all the entries in the source map over the corresponding
  /// entries in the destination, which must exist.
  static void copyInto(const DeclMapTy &Src, DeclMapTy &Dest) {
    for (auto &Pair : Src) {
      if (!Pair.second.isValid()) {
        Dest.erase(Pair.first);
        continue;
      }

      auto I = Dest.find(Pair.first);
      if (I != Dest.end())
        I->second = Pair.second;
      else
        Dest.insert(Pair);
    }
  }
};

/// The scope used to remap some variables as private in the OpenMP loop body
/// (or other captured region emitted without outlining), and to restore old
/// vars back on exit.
class OMPPrivateScope : public RunCleanupsScope {
  OMPMapVars MappedVars;
  OMPPrivateScope(const OMPPrivateScope &) = delete;
  void operator=(const OMPPrivateScope &) = delete;

public:
  /// Enter a new OpenMP private scope.
  explicit OMPPrivateScope(CodeGenFunction &CGF) : RunCleanupsScope(CGF) {}

  /// Registers \p LocalVD variable as a private and apply \p PrivateGen
  /// function for it to generate corresponding private variable. \p
  /// PrivateGen returns an address of the generated private variable.
  /// \return true if the variable is registered as private, false if it has
  /// been privatized already.
  bool addPrivate(const VarDecl *LocalVD,
                  const llvm::function_ref<Address()> PrivateGen) {
    assert(PerformCleanup && "adding private to dead scope")((PerformCleanup && "adding private to dead scope") ?
 static_cast<void> (0) : __assert_fail ("PerformCleanup && \"adding private to dead scope\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 918, __PRETTY_FUNCTION__));
    return MappedVars.setVarAddr(CGF, LocalVD, PrivateGen());
  }

  /// Privatizes local variables previously registered as private.
  /// Registration is separate from the actual privatization to allow
  /// initializers use values of the original variables, not the private one.
  /// This is important, for example, if the private variable is a class
  /// variable initialized by a constructor that references other private
  /// variables. But at initialization original variables must be used, not
  /// private copies.
  /// \return true if at least one variable was privatized, false otherwise.
  bool Privatize() { return MappedVars.apply(CGF); }

  void ForceCleanup() {
    RunCleanupsScope::ForceCleanup();
    MappedVars.restore(CGF);
  }

  /// Exit scope - all the mapped variables are restored.
  ~OMPPrivateScope() {
    if (PerformCleanup)
      ForceCleanup();
  }

  /// Checks if the global variable is captured in current function.
  bool isGlobalVarCaptured(const VarDecl *VD) const {
    VD = VD->getCanonicalDecl();
    return !VD->isLocalVarDeclOrParm() && CGF.LocalDeclMap.count(VD) > 0;
  }
};

/// Takes the old cleanup stack size and emits the cleanup blocks
/// that have been added.
void
PopCleanupBlocks(EHScopeStack::stable_iterator OldCleanupStackSize,
                 std::initializer_list<llvm::Value **> ValuesToReload = {});

/// Takes the old cleanup stack size and emits the cleanup blocks
/// that have been added, then adds all lifetime-extended cleanups from
/// the given position to the stack.
void
PopCleanupBlocks(EHScopeStack::stable_iterator OldCleanupStackSize,
                 size_t OldLifetimeExtendedStackSize,
                 std::initializer_list<llvm::Value **> ValuesToReload = {});

void ResolveBranchFixups(llvm::BasicBlock *Target);

/// The given basic block lies in the current EH scope, but may be a
/// target of a potentially scope-crossing jump; get a stable handle
/// to which we can perform this jump later.
JumpDest getJumpDestInCurrentScope(llvm::BasicBlock *Target) {
  return JumpDest(Target,
                  EHStack.getInnermostNormalCleanup(),
                  NextCleanupDestIndex++);
}

/// The given basic block lies in the current EH scope, but may be a
/// target of a potentially scope-crossing jump; get a stable handle
/// to which we can perform this jump later.
JumpDest getJumpDestInCurrentScope(StringRef Name = StringRef()) {
  return getJumpDestInCurrentScope(createBasicBlock(Name));
}

/// EmitBranchThroughCleanup - Emit a branch from the current insert
/// block through the normal cleanup handling code (if any) and then
/// on to \arg Dest.
void EmitBranchThroughCleanup(JumpDest Dest);

/// isObviouslyBranchWithoutCleanups - Return true if a branch to the
/// specified destination obviously has no cleanups to run.  'false' is always
/// a conservatively correct answer for this method.
bool isObviouslyBranchWithoutCleanups(JumpDest Dest) const;

/// popCatchScope - Pops the catch scope at the top of the EHScope
/// stack, emitting any required code (other than the catch handlers
/// themselves).
void popCatchScope();

llvm::BasicBlock *getEHResumeBlock(bool isCleanup);
llvm::BasicBlock *getEHDispatchBlock(EHScopeStack::stable_iterator scope);
llvm::BasicBlock *
getFuncletEHDispatchBlock(EHScopeStack::stable_iterator scope);

/// An object to manage conditionally-evaluated expressions.
class ConditionalEvaluation {
  llvm::BasicBlock *StartBB;

public:
  ConditionalEvaluation(CodeGenFunction &CGF)
    : StartBB(CGF.Builder.GetInsertBlock()) {}

  void begin(CodeGenFunction &CGF) {
    assert(CGF.OutermostConditional != this)((CGF.OutermostConditional != this) ? static_cast<void>
 (0) : __assert_fail ("CGF.OutermostConditional != this", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 1011, __PRETTY_FUNCTION__));
    if (!CGF.OutermostConditional)
      CGF.OutermostConditional = this;
  }

  void end(CodeGenFunction &CGF) {
    assert(CGF.OutermostConditional != nullptr)((CGF.OutermostConditional != nullptr) ? static_cast<void>
 (0) : __assert_fail ("CGF.OutermostConditional != nullptr", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 1017, __PRETTY_FUNCTION__));
    if (CGF.OutermostConditional == this)
      CGF.OutermostConditional = nullptr;
  }

  /// Returns a block which will be executed prior to each
  /// evaluation of the conditional code.
  llvm::BasicBlock *getStartingBlock() const {
    return StartBB;
  }
};

/// isInConditionalBranch - Return true if we're currently emitting
/// one branch or the other of a conditional expression.
bool isInConditionalBranch() const { return OutermostConditional != nullptr; }

void setBeforeOutermostConditional(llvm::Value *value, Address addr) {
  assert(isInConditionalBranch())((isInConditionalBranch()) ? static_cast<void> (0) : __assert_fail
 ("isInConditionalBranch()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 1034, __PRETTY_FUNCTION__));
  llvm::BasicBlock *block = OutermostConditional->getStartingBlock();
  auto store = new llvm::StoreInst(value, addr.getPointer(), &block->back());
  store->setAlignment(addr.getAlignment().getQuantity());
}

/// An RAII object to record that we're evaluating a statement
/// expression.
class StmtExprEvaluation {
  CodeGenFunction &CGF;

  /// We have to save the outermost conditional: cleanups in a
  /// statement expression aren't conditional just because the
  /// StmtExpr is.
  ConditionalEvaluation *SavedOutermostConditional;

public:
  StmtExprEvaluation(CodeGenFunction &CGF)
    : CGF(CGF), SavedOutermostConditional(CGF.OutermostConditional) {
    CGF.OutermostConditional = nullptr;
  }

  ~StmtExprEvaluation() {
    CGF.OutermostConditional = SavedOutermostConditional;
    CGF.EnsureInsertPoint();
  }
};

/// An object which temporarily prevents a value from being
/// destroyed by aggressive peephole optimizations that assume that
/// all uses of a value have been realized in the IR.
class PeepholeProtection {
  llvm::Instruction *Inst;
  friend class CodeGenFunction;

public:
  PeepholeProtection() : Inst(nullptr) {}
};

/// A non-RAII class containing all the information about a bound
/// opaque value.  OpaqueValueMapping, below, is a RAII wrapper for
/// this which makes individual mappings very simple; using this
/// class directly is useful when you have a variable number of
/// opaque values or don't want the RAII functionality for some
/// reason.
class OpaqueValueMappingData {
  const OpaqueValueExpr *OpaqueValue;
  bool BoundLValue;
  CodeGenFunction::PeepholeProtection Protection;

  OpaqueValueMappingData(const OpaqueValueExpr *ov,
                         bool boundLValue)
    : OpaqueValue(ov), BoundLValue(boundLValue) {}
public:
  OpaqueValueMappingData() : OpaqueValue(nullptr) {}

  static bool shouldBindAsLValue(const Expr *expr) {
    // gl-values should be bound as l-values for obvious reasons.
    // Records should be bound as l-values because IR generation
    // always keeps them in memory.  Expressions of function type
    // act exactly like l-values but are formally required to be
    // r-values in C.
    return expr->isGLValue() ||
           expr->getType()->isFunctionType() ||
           hasAggregateEvaluationKind(expr->getType());
  }

  static OpaqueValueMappingData bind(CodeGenFunction &CGF,
                                     const OpaqueValueExpr *ov,
                                     const Expr *e) {
    if (shouldBindAsLValue(ov))
      return bind(CGF, ov, CGF.EmitLValue(e));
    return bind(CGF, ov, CGF.EmitAnyExpr(e));
  }

  static OpaqueValueMappingData bind(CodeGenFunction &CGF,
                                     const OpaqueValueExpr *ov,
                                     const LValue &lv) {
    assert(shouldBindAsLValue(ov))((shouldBindAsLValue(ov)) ? static_cast<void> (0) : __assert_fail
 ("shouldBindAsLValue(ov)", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 1112, __PRETTY_FUNCTION__));
    CGF.OpaqueLValues.insert(std::make_pair(ov, lv));
    return OpaqueValueMappingData(ov, true);
  }

  static OpaqueValueMappingData bind(CodeGenFunction &CGF,
                                     const OpaqueValueExpr *ov,
                                     const RValue &rv) {
    assert(!shouldBindAsLValue(ov))((!shouldBindAsLValue(ov)) ? static_cast<void> (0) : __assert_fail
 ("!shouldBindAsLValue(ov)", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 1120, __PRETTY_FUNCTION__));
    CGF.OpaqueRValues.insert(std::make_pair(ov, rv));

    OpaqueValueMappingData data(ov, false);

    // Work around an extremely aggressive peephole optimization in
    // EmitScalarConversion which assumes that all other uses of a
    // value are extant.
    data.Protection = CGF.protectFromPeepholes(rv);

    return data;
  }

  bool isValid() const { return OpaqueValue != nullptr; }
  void clear() { OpaqueValue = nullptr; }

  void unbind(CodeGenFunction &CGF) {
    assert(OpaqueValue && "no data to unbind!")((OpaqueValue && "no data to unbind!") ? static_cast<
void> (0) : __assert_fail ("OpaqueValue && \"no data to unbind!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 1137, __PRETTY_FUNCTION__));

    if (BoundLValue) {
      CGF.OpaqueLValues.erase(OpaqueValue);
    } else {
      CGF.OpaqueRValues.erase(OpaqueValue);
      CGF.unprotectFromPeepholes(Protection);
    }
  }
};

/// An RAII object to set (and then clear) a mapping for an OpaqueValueExpr.
class OpaqueValueMapping {
  CodeGenFunction &CGF;
  OpaqueValueMappingData Data;

public:
  static bool shouldBindAsLValue(const Expr *expr) {
    return OpaqueValueMappingData::shouldBindAsLValue(expr);
  }

  /// Build the opaque value mapping for the given conditional
  /// operator if it's the GNU ?: extension.  This is a common
  /// enough pattern that the convenience operator is really
  /// helpful.
  ///
  OpaqueValueMapping(CodeGenFunction &CGF,
                     const AbstractConditionalOperator *op) : CGF(CGF) {
    if (isa<ConditionalOperator>(op))
      // Leave Data empty.
      return;

    const BinaryConditionalOperator *e = cast<BinaryConditionalOperator>(op);
    Data = OpaqueValueMappingData::bind(CGF, e->getOpaqueValue(),
                                        e->getCommon());
  }

  /// Build the opaque value mapping for an OpaqueValueExpr whose source
  /// expression is set to the expression the OVE represents.
  OpaqueValueMapping(CodeGenFunction &CGF, const OpaqueValueExpr *OV)
      : CGF(CGF) {
    if (OV) {
      assert(OV->getSourceExpr() && "wrong form of OpaqueValueMapping used "((OV->getSourceExpr() && "wrong form of OpaqueValueMapping used "
 "for OVE with no source expression") ? static_cast<void>
 (0) : __assert_fail ("OV->getSourceExpr() && \"wrong form of OpaqueValueMapping used \" \"for OVE with no source expression\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 1180, __PRETTY_FUNCTION__))
                                    "for OVE with no source expression")((OV->getSourceExpr() && "wrong form of OpaqueValueMapping used "
 "for OVE with no source expression") ? static_cast<void>
 (0) : __assert_fail ("OV->getSourceExpr() && \"wrong form of OpaqueValueMapping used \" \"for OVE with no source expression\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 1180, __PRETTY_FUNCTION__));
      Data = OpaqueValueMappingData::bind(CGF, OV, OV->getSourceExpr());
    }
  }

  OpaqueValueMapping(CodeGenFunction &CGF,
                     const OpaqueValueExpr *opaqueValue,
                     LValue lvalue)
    : CGF(CGF), Data(OpaqueValueMappingData::bind(CGF, opaqueValue, lvalue)) {
  }

  OpaqueValueMapping(CodeGenFunction &CGF,
                     const OpaqueValueExpr *opaqueValue,
                     RValue rvalue)
    : CGF(CGF), Data(OpaqueValueMappingData::bind(CGF, opaqueValue, rvalue)) {
  }

  void pop() {
    Data.unbind(CGF);
    Data.clear();
  }

  ~OpaqueValueMapping() {
    if (Data.isValid()) Data.unbind(CGF);
  }
};

1207private:
CGDebugInfo *DebugInfo;
/// Used to create unique names for artificial VLA size debug info variables.
unsigned VLAExprCounter = 0;
bool DisableDebugInfo = false;

/// DidCallStackSave - Whether llvm.stacksave has been called. Used to avoid
/// calling llvm.stacksave for multiple VLAs in the same scope.
bool DidCallStackSave = false;

/// IndirectBranch - The first time an indirect goto is seen we create a block
/// with an indirect branch.  Every time we see the address of a label taken,
/// we add the label to the indirect goto.  Every subsequent indirect goto is
/// codegen'd as a jump to the IndirectBranch's basic block.
llvm::IndirectBrInst *IndirectBranch = nullptr;

/// LocalDeclMap - This keeps track of the LLVM allocas or globals for local C
/// decls.
DeclMapTy LocalDeclMap;

// Keep track of the cleanups for callee-destructed parameters pushed to the
// cleanup stack so that they can be deactivated later.
llvm::DenseMap<const ParmVarDecl *, EHScopeStack::stable_iterator>
    CalleeDestructedParamCleanups;

/// SizeArguments - If a ParmVarDecl had the pass_object_size attribute, this
/// will contain a mapping from said ParmVarDecl to its implicit "object_size"
/// parameter.
llvm::SmallDenseMap<const ParmVarDecl *, const ImplicitParamDecl *, 2>
    SizeArguments;

/// Track escaped local variables with auto storage. Used during SEH
/// outlining to produce a call to llvm.localescape.
llvm::DenseMap<llvm::AllocaInst *, int> EscapedLocals;

/// LabelMap - This keeps track of the LLVM basic block for each C label.
llvm::DenseMap<const LabelDecl*, JumpDest> LabelMap;

// BreakContinueStack - This keeps track of where break and continue
// statements should jump to.
struct BreakContinue {
  BreakContinue(JumpDest Break, JumpDest Continue)
    : BreakBlock(Break), ContinueBlock(Continue) {}

  JumpDest BreakBlock;
  JumpDest ContinueBlock;
};
SmallVector<BreakContinue, 8> BreakContinueStack;

/// Handles cancellation exit points in OpenMP-related constructs.
class OpenMPCancelExitStack {
  /// Tracks cancellation exit point and join point for cancel-related exit
  /// and normal exit.
  struct CancelExit {
    CancelExit() = default;
    CancelExit(OpenMPDirectiveKind Kind, JumpDest ExitBlock,
               JumpDest ContBlock)
        : Kind(Kind), ExitBlock(ExitBlock), ContBlock(ContBlock) {}
    OpenMPDirectiveKind Kind = OMPD_unknown;
    /// true if the exit block has been emitted already by the special
    /// emitExit() call, false if the default codegen is used.
    bool HasBeenEmitted = false;
    JumpDest ExitBlock;
    JumpDest ContBlock;
  };

  SmallVector<CancelExit, 8> Stack;

public:
  OpenMPCancelExitStack() : Stack(1) {}
  ~OpenMPCancelExitStack() = default;
  /// Fetches the exit block for the current OpenMP construct.
  JumpDest getExitBlock() const { return Stack.back().ExitBlock; }
  /// Emits exit block with special codegen procedure specific for the related
  /// OpenMP construct + emits code for normal construct cleanup.
  void emitExit(CodeGenFunction &CGF, OpenMPDirectiveKind Kind,
                const llvm::function_ref<void(CodeGenFunction &)> CodeGen) {
    if (Stack.back().Kind == Kind && getExitBlock().isValid()) {
      assert(CGF.getOMPCancelDestination(Kind).isValid())((CGF.getOMPCancelDestination(Kind).isValid()) ? static_cast<
void> (0) : __assert_fail ("CGF.getOMPCancelDestination(Kind).isValid()"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 1285, __PRETTY_FUNCTION__));
      assert(CGF.HaveInsertPoint())((CGF.HaveInsertPoint()) ? static_cast<void> (0) : __assert_fail
 ("CGF.HaveInsertPoint()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 1286, __PRETTY_FUNCTION__));
      assert(!Stack.back().HasBeenEmitted)((!Stack.back().HasBeenEmitted) ? static_cast<void> (0)
 : __assert_fail ("!Stack.back().HasBeenEmitted", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 1287, __PRETTY_FUNCTION__));
      auto IP = CGF.Builder.saveAndClearIP();
      CGF.EmitBlock(Stack.back().ExitBlock.getBlock());
      CodeGen(CGF);
      CGF.EmitBranch(Stack.back().ContBlock.getBlock());
      CGF.Builder.restoreIP(IP);
      Stack.back().HasBeenEmitted = true;
    }
    CodeGen(CGF);
  }
  /// Enter the cancel supporting \a Kind construct.
  /// \param Kind OpenMP directive that supports cancel constructs.
  /// \param HasCancel true, if the construct has inner cancel directive,
  /// false otherwise.
  void enter(CodeGenFunction &CGF, OpenMPDirectiveKind Kind, bool HasCancel) {
    Stack.push_back({Kind,
                     HasCancel ? CGF.getJumpDestInCurrentScope("cancel.exit")
                               : JumpDest(),
                     HasCancel ? CGF.getJumpDestInCurrentScope("cancel.cont")
                               : JumpDest()});
  }
  /// Emits default exit point for the cancel construct (if the special one
  /// has not be used) + join point for cancel/normal exits.
  void exit(CodeGenFunction &CGF) {
    if (getExitBlock().isValid()) {
      assert(CGF.getOMPCancelDestination(Stack.back().Kind).isValid())((CGF.getOMPCancelDestination(Stack.back().Kind).isValid()) ?
 static_cast<void> (0) : __assert_fail ("CGF.getOMPCancelDestination(Stack.back().Kind).isValid()"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 1312, __PRETTY_FUNCTION__));
      bool HaveIP = CGF.HaveInsertPoint();
      if (!Stack.back().HasBeenEmitted) {
        if (HaveIP)
          CGF.EmitBranchThroughCleanup(Stack.back().ContBlock);
        CGF.EmitBlock(Stack.back().ExitBlock.getBlock());
        CGF.EmitBranchThroughCleanup(Stack.back().ContBlock);
      }
      CGF.EmitBlock(Stack.back().ContBlock.getBlock());
      if (!HaveIP) {
        CGF.Builder.CreateUnreachable();
        CGF.Builder.ClearInsertionPoint();
      }
    }
    Stack.pop_back();
  }
};
OpenMPCancelExitStack OMPCancelStack;

CodeGenPGO PGO;

/// Calculate branch weights appropriate for PGO data
llvm::MDNode *createProfileWeights(uint64_t TrueCount, uint64_t FalseCount);
llvm::MDNode *createProfileWeights(ArrayRef<uint64_t> Weights);
llvm::MDNode *createProfileWeightsForLoop(const Stmt *Cond,
                                          uint64_t LoopCount);

1339public:
/// Increment the profiler's counter for the given statement by \p StepV.
/// If \p StepV is null, the default increment is 1.
void incrementProfileCounter(const Stmt *S, llvm::Value *StepV = nullptr) {
  if (CGM.getCodeGenOpts().hasProfileClangInstr())
    PGO.emitCounterIncrement(Builder, S, StepV);
  PGO.setCurrentStmt(S);
}

/// Get the profiler's count for the given statement.
uint64_t getProfileCount(const Stmt *S) {
  Optional<uint64_t> Count = PGO.getStmtCount(S);
  if (!Count.hasValue())
    return 0;
  return *Count;
}

/// Set the profiler's current count.
void setCurrentProfileCount(uint64_t Count) {
  PGO.setCurrentRegionCount(Count);
}

/// Get the profiler's current count. This is generally the count for the most
/// recently incremented counter.
uint64_t getCurrentProfileCount() {
  return PGO.getCurrentRegionCount();
}

1367private:

/// SwitchInsn - This is nearest current switch instruction. It is null if
/// current context is not in a switch.
llvm::SwitchInst *SwitchInsn = nullptr;
/// The branch weights of SwitchInsn when doing instrumentation based PGO.
SmallVector<uint64_t, 16> *SwitchWeights = nullptr;

/// CaseRangeBlock - This block holds if condition check for last case
/// statement range in current switch instruction.
llvm::BasicBlock *CaseRangeBlock = nullptr;

/// OpaqueLValues - Keeps track of the current set of opaque value
/// expressions.
llvm::DenseMap<const OpaqueValueExpr *, LValue> OpaqueLValues;
llvm::DenseMap<const OpaqueValueExpr *, RValue> OpaqueRValues;

// VLASizeMap - This keeps track of the associated size for each VLA type.
// We track this by the size expression rather than the type itself because
// in certain situations, like a const qualifier applied to an VLA typedef,
// multiple VLA types can share the same size expression.
// FIXME: Maybe this could be a stack of maps that is pushed/popped as we
// enter/leave scopes.
llvm::DenseMap<const Expr*, llvm::Value*> VLASizeMap;

/// A block containing a single 'unreachable' instruction.  Created
/// lazily by getUnreachableBlock().
llvm::BasicBlock *UnreachableBlock = nullptr;

/// Counts of the number return expressions in the function.
unsigned NumReturnExprs = 0;

/// Count the number of simple (constant) return expressions in the function.
unsigned NumSimpleReturnExprs = 0;

/// The last regular (non-return) debug location (breakpoint) in the function.
SourceLocation LastStopPoint;

1405public:
/// Source location information about the default argument or member
/// initializer expression we're evaluating, if any.
CurrentSourceLocExprScope CurSourceLocExprScope;
using SourceLocExprScopeGuard =
    CurrentSourceLocExprScope::SourceLocExprScopeGuard;

/// A scope within which we are constructing the fields of an object which
/// might use a CXXDefaultInitExpr. This stashes away a 'this' value to use
/// if we need to evaluate a CXXDefaultInitExpr within the evaluation.
class FieldConstructionScope {
public:
  FieldConstructionScope(CodeGenFunction &CGF, Address This)
      : CGF(CGF), OldCXXDefaultInitExprThis(CGF.CXXDefaultInitExprThis) {
    CGF.CXXDefaultInitExprThis = This;
  }
  ~FieldConstructionScope() {
    CGF.CXXDefaultInitExprThis = OldCXXDefaultInitExprThis;
  }

private:
  CodeGenFunction &CGF;
  Address OldCXXDefaultInitExprThis;
};

/// The scope of a CXXDefaultInitExpr. Within this scope, the value of 'this'
/// is overridden to be the object under construction.
class CXXDefaultInitExprScope  {
public:
  CXXDefaultInitExprScope(CodeGenFunction &CGF, const CXXDefaultInitExpr *E)
      : CGF(CGF), OldCXXThisValue(CGF.CXXThisValue),
        OldCXXThisAlignment(CGF.CXXThisAlignment),
        SourceLocScope(E, CGF.CurSourceLocExprScope) {
    CGF.CXXThisValue = CGF.CXXDefaultInitExprThis.getPointer();
    CGF.CXXThisAlignment = CGF.CXXDefaultInitExprThis.getAlignment();
  }
  ~CXXDefaultInitExprScope() {
    CGF.CXXThisValue = OldCXXThisValue;
    CGF.CXXThisAlignment = OldCXXThisAlignment;
  }

public:
  CodeGenFunction &CGF;
  llvm::Value *OldCXXThisValue;
  CharUnits OldCXXThisAlignment;
  SourceLocExprScopeGuard SourceLocScope;
};

struct CXXDefaultArgExprScope : SourceLocExprScopeGuard {
  CXXDefaultArgExprScope(CodeGenFunction &CGF, const CXXDefaultArgExpr *E)
      : SourceLocExprScopeGuard(E, CGF.CurSourceLocExprScope) {}
};

/// The scope of an ArrayInitLoopExpr. Within this scope, the value of the
/// current loop index is overridden.
class ArrayInitLoopExprScope {
public:
  ArrayInitLoopExprScope(CodeGenFunction &CGF, llvm::Value *Index)
    : CGF(CGF), OldArrayInitIndex(CGF.ArrayInitIndex) {
    CGF.ArrayInitIndex = Index;
  }
  ~ArrayInitLoopExprScope() {
    CGF.ArrayInitIndex = OldArrayInitIndex;
  }

private:
  CodeGenFunction &CGF;
  llvm::Value *OldArrayInitIndex;
};

class InlinedInheritingConstructorScope {
public:
  InlinedInheritingConstructorScope(CodeGenFunction &CGF, GlobalDecl GD)
      : CGF(CGF), OldCurGD(CGF.CurGD), OldCurFuncDecl(CGF.CurFuncDecl),
        OldCurCodeDecl(CGF.CurCodeDecl),
        OldCXXABIThisDecl(CGF.CXXABIThisDecl),
        OldCXXABIThisValue(CGF.CXXABIThisValue),
        OldCXXThisValue(CGF.CXXThisValue),
        OldCXXABIThisAlignment(CGF.CXXABIThisAlignment),
        OldCXXThisAlignment(CGF.CXXThisAlignment),
        OldReturnValue(CGF.ReturnValue), OldFnRetTy(CGF.FnRetTy),
        OldCXXInheritedCtorInitExprArgs(
            std::move(CGF.CXXInheritedCtorInitExprArgs)) {
    CGF.CurGD = GD;
    CGF.CurFuncDecl = CGF.CurCodeDecl =
        cast<CXXConstructorDecl>(GD.getDecl());
    CGF.CXXABIThisDecl = nullptr;
    CGF.CXXABIThisValue = nullptr;
    CGF.CXXThisValue = nullptr;
    CGF.CXXABIThisAlignment = CharUnits();
    CGF.CXXThisAlignment = CharUnits();
    CGF.ReturnValue = Address::invalid();
    CGF.FnRetTy = QualType();
    CGF.CXXInheritedCtorInitExprArgs.clear();
  }
  ~InlinedInheritingConstructorScope() {
    CGF.CurGD = OldCurGD;
    CGF.CurFuncDecl = OldCurFuncDecl;
    CGF.CurCodeDecl = OldCurCodeDecl;
    CGF.CXXABIThisDecl = OldCXXABIThisDecl;
    CGF.CXXABIThisValue = OldCXXABIThisValue;
    CGF.CXXThisValue = OldCXXThisValue;
    CGF.CXXABIThisAlignment = OldCXXABIThisAlignment;
    CGF.CXXThisAlignment = OldCXXThisAlignment;
    CGF.ReturnValue = OldReturnValue;
    CGF.FnRetTy = OldFnRetTy;
    CGF.CXXInheritedCtorInitExprArgs =
        std::move(OldCXXInheritedCtorInitExprArgs);
  }

private:
  CodeGenFunction &CGF;
  GlobalDecl OldCurGD;
  const Decl *OldCurFuncDecl;
  const Decl *OldCurCodeDecl;
  ImplicitParamDecl *OldCXXABIThisDecl;
  llvm::Value *OldCXXABIThisValue;
  llvm::Value *OldCXXThisValue;
  CharUnits OldCXXABIThisAlignment;
  CharUnits OldCXXThisAlignment;
  Address OldReturnValue;
  QualType OldFnRetTy;
  CallArgList OldCXXInheritedCtorInitExprArgs;
};

1530private:
/// CXXThisDecl - When generating code for a C++ member function,
/// this will hold the implicit 'this' declaration.
ImplicitParamDecl *CXXABIThisDecl = nullptr;
llvm::Value *CXXABIThisValue = nullptr;
llvm::Value *CXXThisValue = nullptr;
CharUnits CXXABIThisAlignment;
CharUnits CXXThisAlignment;

/// The value of 'this' to use when evaluating CXXDefaultInitExprs within
/// this expression.
Address CXXDefaultInitExprThis = Address::invalid();

/// The current array initialization index when evaluating an
/// ArrayInitIndexExpr within an ArrayInitLoopExpr.
llvm::Value *ArrayInitIndex = nullptr;

/// The values of function arguments to use when evaluating
/// CXXInheritedCtorInitExprs within this context.
CallArgList CXXInheritedCtorInitExprArgs;

/// CXXStructorImplicitParamDecl - When generating code for a constructor or
/// destructor, this will hold the implicit argument (e.g. VTT).
ImplicitParamDecl *CXXStructorImplicitParamDecl = nullptr;
llvm::Value *CXXStructorImplicitParamValue = nullptr;

/// OutermostConditional - Points to the outermost active
/// conditional control.  This is used so that we know if a
/// temporary should be destroyed conditionally.
ConditionalEvaluation *OutermostConditional = nullptr;

/// The current lexical scope.
LexicalScope *CurLexicalScope = nullptr;

/// The current source location that should be used for exception
/// handling code.
SourceLocation CurEHLocation;

/// BlockByrefInfos - For each __block variable, contains
/// information about the layout of the variable.
llvm::DenseMap<const ValueDecl *, BlockByrefInfo> BlockByrefInfos;

/// Used by -fsanitize=nullability-return to determine whether the return
/// value can be checked.
llvm::Value *RetValNullabilityPrecondition = nullptr;

/// Check if -fsanitize=nullability-return instrumentation is required for
/// this function.
bool requiresReturnValueNullabilityCheck() const {
  return RetValNullabilityPrecondition;
}

/// Used to store precise source locations for return statements by the
/// runtime return value checks.
Address ReturnLocation = Address::invalid();

/// Check if the return value of this function requires sanitization.
bool requiresReturnValueCheck() const {
  return requiresReturnValueNullabilityCheck() ||
         (SanOpts.has(SanitizerKind::ReturnsNonnullAttribute) &&
          CurCodeDecl && CurCodeDecl->getAttr<ReturnsNonNullAttr>());
}

llvm::BasicBlock *TerminateLandingPad = nullptr;
llvm::BasicBlock *TerminateHandler = nullptr;
llvm::BasicBlock *TrapBB = nullptr;

/// Terminate funclets keyed by parent funclet pad.
llvm::MapVector<llvm::Value *, llvm::BasicBlock *> TerminateFunclets;

/// Largest vector width used in ths function. Will be used to create a
/// function attribute.
unsigned LargestVectorWidth = 0;

/// True if we need emit the life-time markers.
const bool ShouldEmitLifetimeMarkers;

/// Add OpenCL kernel arg metadata and the kernel attribute metadata to
/// the function metadata.
void EmitOpenCLKernelMetadata(const FunctionDecl *FD,
                              llvm::Function *Fn);

1612public:
CodeGenFunction(CodeGenModule &cgm, bool suppressNewContext=false);
~CodeGenFunction();

CodeGenTypes &getTypes() const { return CGM.getTypes(); }
ASTContext &getContext() const { return CGM.getContext(); }
CGDebugInfo *getDebugInfo() {
  if (DisableDebugInfo)
    return nullptr;
  return DebugInfo;
}
void disableDebugInfo() { DisableDebugInfo = true; }
void enableDebugInfo() { DisableDebugInfo = false; }

bool shouldUseFusedARCCalls() {
  return CGM.getCodeGenOpts().OptimizationLevel == 0;
}

const LangOptions &getLangOpts() const { return CGM.getLangOpts(); }

/// Returns a pointer to the function's exception object and selector slot,
/// which is assigned in every landing pad.
Address getExceptionSlot();
Address getEHSelectorSlot();

/// Returns the contents of the function's exception object and selector
/// slots.
llvm::Value *getExceptionFromSlot();
llvm::Value *getSelectorFromSlot();

Address getNormalCleanupDestSlot();

llvm::BasicBlock *getUnreachableBlock() {
  if (!UnreachableBlock) {
    UnreachableBlock = createBasicBlock("unreachable");
    new llvm::UnreachableInst(getLLVMContext(), UnreachableBlock);
  }
  return UnreachableBlock;
}

llvm::BasicBlock *getInvokeDest() {
  if (!EHStack.requiresLandingPad()) return nullptr;
  return getInvokeDestImpl();
}

bool currentFunctionUsesSEHTry() const { return CurSEHParent != nullptr; }

const TargetInfo &getTarget() const { return Target; }
llvm::LLVMContext &getLLVMContext() { return CGM.getLLVMContext(); }
const TargetCodeGenInfo &getTargetHooks() const {
  return CGM.getTargetCodeGenInfo();
}

//===--------------------------------------------------------------------===//
//                                  Cleanups
//===--------------------------------------------------------------------===//

typedef void Destroyer(CodeGenFunction &CGF, Address addr, QualType ty);

void pushIrregularPartialArrayCleanup(llvm::Value *arrayBegin,
                                      Address arrayEndPointer,
                                      QualType elementType,
                                      CharUnits elementAlignment,
                                      Destroyer *destroyer);
void pushRegularPartialArrayCleanup(llvm::Value *arrayBegin,
                                    llvm::Value *arrayEnd,
                                    QualType elementType,
                                    CharUnits elementAlignment,
                                    Destroyer *destroyer);

void pushDestroy(QualType::DestructionKind dtorKind,
                 Address addr, QualType type);
void pushEHDestroy(QualType::DestructionKind dtorKind,
                   Address addr, QualType type);
void pushDestroy(CleanupKind kind, Address addr, QualType type,
                 Destroyer *destroyer, bool useEHCleanupForArray);
void pushLifetimeExtendedDestroy(CleanupKind kind, Address addr,
                                 QualType type, Destroyer *destroyer,
                                 bool useEHCleanupForArray);
void pushCallObjectDeleteCleanup(const FunctionDecl *OperatorDelete,
                                 llvm::Value *CompletePtr,
                                 QualType ElementType);
void pushStackRestore(CleanupKind kind, Address SPMem);
void emitDestroy(Address addr, QualType type, Destroyer *destroyer,
                 bool useEHCleanupForArray);
llvm::Function *generateDestroyHelper(Address addr, QualType type,
                                      Destroyer *destroyer,
                                      bool useEHCleanupForArray,
                                      const VarDecl *VD);
void emitArrayDestroy(llvm::Value *begin, llvm::Value *end,
                      QualType elementType, CharUnits elementAlign,
                      Destroyer *destroyer,
                      bool checkZeroLength, bool useEHCleanup);

Destroyer *getDestroyer(QualType::DestructionKind destructionKind);

/// Determines whether an EH cleanup is required to destroy a type
/// with the given destruction kind.
bool needsEHCleanup(QualType::DestructionKind kind) {
  switch (kind) {
  case QualType::DK_none:
    return false;
  case QualType::DK_cxx_destructor:
  case QualType::DK_objc_weak_lifetime:
  case QualType::DK_nontrivial_c_struct:
    return getLangOpts().Exceptions;
  case QualType::DK_objc_strong_lifetime:
    return getLangOpts().Exceptions &&
           CGM.getCodeGenOpts().ObjCAutoRefCountExceptions;
  }
  llvm_unreachable("bad destruction kind")::llvm::llvm_unreachable_internal("bad destruction kind", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 1722);
}

CleanupKind getCleanupKind(QualType::DestructionKind kind) {
  return (needsEHCleanup(kind) ? NormalAndEHCleanup : NormalCleanup);
}

//===--------------------------------------------------------------------===//
//                                  Objective-C
//===--------------------------------------------------------------------===//

void GenerateObjCMethod(const ObjCMethodDecl *OMD);

void StartObjCMethod(const ObjCMethodDecl *MD, const ObjCContainerDecl *CD);

/// GenerateObjCGetter - Synthesize an Objective-C property getter function.
void GenerateObjCGetter(ObjCImplementationDecl *IMP,
                        const ObjCPropertyImplDecl *PID);
void generateObjCGetterBody(const ObjCImplementationDecl *classImpl,
                            const ObjCPropertyImplDecl *propImpl,
                            const ObjCMethodDecl *GetterMothodDecl,
                            llvm::Constant *AtomicHelperFn);

void GenerateObjCCtorDtorMethod(ObjCImplementationDecl *IMP,
                                ObjCMethodDecl *MD, bool ctor);

/// GenerateObjCSetter - Synthesize an Objective-C property setter function
/// for the given property.
void GenerateObjCSetter(ObjCImplementationDecl *IMP,
                        const ObjCPropertyImplDecl *PID);
void generateObjCSetterBody(const ObjCImplementationDecl *classImpl,
                            const ObjCPropertyImplDecl *propImpl,
                            llvm::Constant *AtomicHelperFn);

//===--------------------------------------------------------------------===//
//                                  Block Bits
//===--------------------------------------------------------------------===//

/// Emit block literal.
/// \return an LLVM value which is a pointer to a struct which contains
/// information about the block, including the block invoke function, the
/// captured variables, etc.
llvm::Value *EmitBlockLiteral(const BlockExpr *);
static void destroyBlockInfos(CGBlockInfo *info);

llvm::Function *GenerateBlockFunction(GlobalDecl GD,
                                      const CGBlockInfo &Info,
                                      const DeclMapTy &ldm,
                                      bool IsLambdaConversionToBlock,
                                      bool BuildGlobalBlock);

/// Check if \p T is a C++ class that has a destructor that can throw.
static bool cxxDestructorCanThrow(QualType T);

llvm::Constant *GenerateCopyHelperFunction(const CGBlockInfo &blockInfo);
llvm::Constant *GenerateDestroyHelperFunction(const CGBlockInfo &blockInfo);
llvm::Constant *GenerateObjCAtomicSetterCopyHelperFunction(
                                           const ObjCPropertyImplDecl *PID);
llvm::Constant *GenerateObjCAtomicGetterCopyHelperFunction(
                                           const ObjCPropertyImplDecl *PID);
llvm::Value *EmitBlockCopyAndAutorelease(llvm::Value *Block, QualType Ty);

void BuildBlockRelease(llvm::Value *DeclPtr, BlockFieldFlags flags,
                       bool CanThrow);

class AutoVarEmission;

void emitByrefStructureInit(const AutoVarEmission &emission);

/// Enter a cleanup to destroy a __block variable.  Note that this
/// cleanup should be a no-op if the variable hasn't left the stack
/// yet; if a cleanup is required for the variable itself, that needs
/// to be done externally.
///
/// \param Kind Cleanup kind.
///
/// \param Addr When \p LoadBlockVarAddr is false, the address of the __block
/// structure that will be passed to _Block_object_dispose. When
/// \p LoadBlockVarAddr is true, the address of the field of the block
/// structure that holds the address of the __block structure.
///
/// \param Flags The flag that will be passed to _Block_object_dispose.
///
/// \param LoadBlockVarAddr Indicates whether we need to emit a load from
/// \p Addr to get the address of the __block structure.
void enterByrefCleanup(CleanupKind Kind, Address Addr, BlockFieldFlags Flags,
                       bool LoadBlockVarAddr, bool CanThrow);

void setBlockContextParameter(const ImplicitParamDecl *D, unsigned argNum,
                              llvm::Value *ptr);

Address LoadBlockStruct();
Address GetAddrOfBlockDecl(const VarDecl *var);

/// BuildBlockByrefAddress - Computes the location of the
/// data in a variable which is declared as __block.
Address emitBlockByrefAddress(Address baseAddr, const VarDecl *V,
                              bool followForward = true);
Address emitBlockByrefAddress(Address baseAddr,
                              const BlockByrefInfo &info,
                              bool followForward,
                              const llvm::Twine &name);

const BlockByrefInfo &getBlockByrefInfo(const VarDecl *var);

QualType BuildFunctionArgList(GlobalDecl GD, FunctionArgList &Args);

void GenerateCode(GlobalDecl GD, llvm::Function *Fn,
                  const CGFunctionInfo &FnInfo);

/// Annotate the function with an attribute that disables TSan checking at
/// runtime.
void markAsIgnoreThreadCheckingAtRuntime(llvm::Function *Fn);

/// Emit code for the start of a function.
/// \param Loc       The location to be associated with the function.
/// \param StartLoc  The location of the function body.
void StartFunction(GlobalDecl GD,
                   QualType RetTy,
                   llvm::Function *Fn,
                   const CGFunctionInfo &FnInfo,
                   const FunctionArgList &Args,
                   SourceLocation Loc = SourceLocation(),
                   SourceLocation StartLoc = SourceLocation());

static bool IsConstructorDelegationValid(const CXXConstructorDecl *Ctor);

void EmitConstructorBody(FunctionArgList &Args);
void EmitDestructorBody(FunctionArgList &Args);
void emitImplicitAssignmentOperatorBody(FunctionArgList &Args);
void EmitFunctionBody(const Stmt *Body);
void EmitBlockWithFallThrough(llvm::BasicBlock *BB, const Stmt *S);

void EmitForwardingCallToLambda(const CXXMethodDecl *LambdaCallOperator,
                                CallArgList &CallArgs);
void EmitLambdaBlockInvokeBody();
void EmitLambdaDelegatingInvokeBody(const CXXMethodDecl *MD);
void EmitLambdaStaticInvokeBody(const CXXMethodDecl *MD);
void EmitLambdaVLACapture(const VariableArrayType *VAT, LValue LV) {
  EmitStoreThroughLValue(RValue::get(VLASizeMap[VAT->getSizeExpr()]), LV);
}
void EmitAsanPrologueOrEpilogue(bool Prologue);

/// Emit the unified return block, trying to avoid its emission when
/// possible.
/// \return The debug location of the user written return statement if the
/// return block is is avoided.
llvm::DebugLoc EmitReturnBlock();

/// FinishFunction - Complete IR generation of the current function. It is
/// legal to call this function even if there is no current insertion point.
void FinishFunction(SourceLocation EndLoc=SourceLocation());

void StartThunk(llvm::Function *Fn, GlobalDecl GD,
                const CGFunctionInfo &FnInfo, bool IsUnprototyped);

void EmitCallAndReturnForThunk(llvm::FunctionCallee Callee,
                               const ThunkInfo *Thunk, bool IsUnprototyped);

void FinishThunk();

/// Emit a musttail call for a thunk with a potentially adjusted this pointer.
void EmitMustTailThunk(GlobalDecl GD, llvm::Value *AdjustedThisPtr,
                       llvm::FunctionCallee Callee);

/// Generate a thunk for the given method.
void generateThunk(llvm::Function *Fn, const CGFunctionInfo &FnInfo,
                   GlobalDecl GD, const ThunkInfo &Thunk,
                   bool IsUnprototyped);

llvm::Function *GenerateVarArgsThunk(llvm::Function *Fn,
                                     const CGFunctionInfo &FnInfo,
                                     GlobalDecl GD, const ThunkInfo &Thunk);

void EmitCtorPrologue(const CXXConstructorDecl *CD, CXXCtorType Type,
                      FunctionArgList &Args);

void EmitInitializerForField(FieldDecl *Field, LValue LHS, Expr *Init);

/// Struct with all information about dynamic [sub]class needed to set vptr.
struct VPtr {
  BaseSubobject Base;
  const CXXRecordDecl *NearestVBase;
  CharUnits OffsetFromNearestVBase;
  const CXXRecordDecl *VTableClass;
};

/// Initialize the vtable pointer of the given subobject.
void InitializeVTablePointer(const VPtr &vptr);

typedef llvm::SmallVector<VPtr, 4> VPtrsVector;

typedef llvm::SmallPtrSet<const CXXRecordDecl *, 4> VisitedVirtualBasesSetTy;
VPtrsVector getVTablePointers(const CXXRecordDecl *VTableClass);

void getVTablePointers(BaseSubobject Base, const CXXRecordDecl *NearestVBase,
                       CharUnits OffsetFromNearestVBase,
                       bool BaseIsNonVirtualPrimaryBase,
                       const CXXRecordDecl *VTableClass,
                       VisitedVirtualBasesSetTy &VBases, VPtrsVector &vptrs);

void InitializeVTablePointers(const CXXRecordDecl *ClassDecl);

/// GetVTablePtr - Return the Value of the vtable pointer member pointed
/// to by This.
llvm::Value *GetVTablePtr(Address This, llvm::Type *VTableTy,
                          const CXXRecordDecl *VTableClass);

enum CFITypeCheckKind {
  CFITCK_VCall,
  CFITCK_NVCall,
  CFITCK_DerivedCast,
  CFITCK_UnrelatedCast,
  CFITCK_ICall,
  CFITCK_NVMFCall,
  CFITCK_VMFCall,
};

/// Derived is the presumed address of an object of type T after a
/// cast. If T is a polymorphic class type, emit a check that the virtual
/// table for Derived belongs to a class derived from T.
void EmitVTablePtrCheckForCast(QualType T, llvm::Value *Derived,
                               bool MayBeNull, CFITypeCheckKind TCK,
                               SourceLocation Loc);

/// EmitVTablePtrCheckForCall - Virtual method MD is being called via VTable.
/// If vptr CFI is enabled, emit a check that VTable is valid.
void EmitVTablePtrCheckForCall(const CXXRecordDecl *RD, llvm::Value *VTable,
                               CFITypeCheckKind TCK, SourceLocation Loc);

/// EmitVTablePtrCheck - Emit a check that VTable is a valid virtual table for
/// RD using llvm.type.test.
void EmitVTablePtrCheck(const CXXRecordDecl *RD, llvm::Value *VTable,
                        CFITypeCheckKind TCK, SourceLocation Loc);

/// If whole-program virtual table optimization is enabled, emit an assumption
/// that VTable is a member of RD's type identifier. Or, if vptr CFI is
/// enabled, emit a check that VTable is a member of RD's type identifier.
void EmitTypeMetadataCodeForVCall(const CXXRecordDecl *RD,
                                  llvm::Value *VTable, SourceLocation Loc);

/// Returns whether we should perform a type checked load when loading a
/// virtual function for virtual calls to members of RD. This is generally
/// true when both vcall CFI and whole-program-vtables are enabled.
bool ShouldEmitVTableTypeCheckedLoad(const CXXRecordDecl *RD);

/// Emit a type checked load from the given vtable.
llvm::Value *EmitVTableTypeCheckedLoad(const CXXRecordDecl *RD, llvm::Value *VTable,
                                       uint64_t VTableByteOffset);

/// EnterDtorCleanups - Enter the cleanups necessary to complete the
/// given phase of destruction for a destructor.  The end result
/// should call destructors on members and base classes in reverse
/// order of their construction.
void EnterDtorCleanups(const CXXDestructorDecl *Dtor, CXXDtorType Type);

/// ShouldInstrumentFunction - Return true if the current function should be
/// instrumented with __cyg_profile_func_* calls
bool ShouldInstrumentFunction();

/// ShouldXRayInstrument - Return true if the current function should be
/// instrumented with XRay nop sleds.
bool ShouldXRayInstrumentFunction() const;

/// AlwaysEmitXRayCustomEvents - Return true if we must unconditionally emit
/// XRay custom event handling calls.
bool AlwaysEmitXRayCustomEvents() const;

/// AlwaysEmitXRayTypedEvents - Return true if clang must unconditionally emit
/// XRay typed event handling calls.
bool AlwaysEmitXRayTypedEvents() const;

/// Encode an address into a form suitable for use in a function prologue.
llvm::Constant *EncodeAddrForUseInPrologue(llvm::Function *F,
                                           llvm::Constant *Addr);

/// Decode an address used in a function prologue, encoded by \c
/// EncodeAddrForUseInPrologue.
llvm::Value *DecodeAddrUsedInPrologue(llvm::Value *F,
                                      llvm::Value *EncodedAddr);

/// EmitFunctionProlog - Emit the target specific LLVM code to load the
/// arguments for the given function. This is also responsible for naming the
/// LLVM function arguments.
void EmitFunctionProlog(const CGFunctionInfo &FI,
                        llvm::Function *Fn,
                        const FunctionArgList &Args);

/// EmitFunctionEpilog - Emit the target specific LLVM code to return the
/// given temporary.
void EmitFunctionEpilog(const CGFunctionInfo &FI, bool EmitRetDbgLoc,
                        SourceLocation EndLoc);

/// Emit a test that checks if the return value \p RV is nonnull.
void EmitReturnValueCheck(llvm::Value *RV);

/// EmitStartEHSpec - Emit the start of the exception spec.
void EmitStartEHSpec(const Decl *D);

/// EmitEndEHSpec - Emit the end of the exception spec.
void EmitEndEHSpec(const Decl *D);

/// getTerminateLandingPad - Return a landing pad that just calls terminate.
llvm::BasicBlock *getTerminateLandingPad();

/// getTerminateLandingPad - Return a cleanup funclet that just calls
/// terminate.
llvm::BasicBlock *getTerminateFunclet();

/// getTerminateHandler - Return a handler (not a landing pad, just
/// a catch handler) that just calls terminate.  This is used when
/// a terminate scope encloses a try.
llvm::BasicBlock *getTerminateHandler();

llvm::Type *ConvertTypeForMem(QualType T);
llvm::Type *ConvertType(QualType T);
llvm::Type *ConvertType(const TypeDecl *T) {
  return ConvertType(getContext().getTypeDeclType(T));
}

/// LoadObjCSelf - Load the value of self. This function is only valid while
/// generating code for an Objective-C method.
llvm::Value *LoadObjCSelf();

/// TypeOfSelfObject - Return type of object that this self represents.
QualType TypeOfSelfObject();

/// getEvaluationKind - Return the TypeEvaluationKind of QualType \c T.
static TypeEvaluationKind getEvaluationKind(QualType T);

static bool hasScalarEvaluationKind(QualType T) {
  return getEvaluationKind(T) == TEK_Scalar;
}

static bool hasAggregateEvaluationKind(QualType T) {
  return getEvaluationKind(T) == TEK_Aggregate;
18
←
Assuming the condition is true→
19
←
Returning the value 1, which participates in a condition later→
}

/// createBasicBlock - Create an LLVM basic block.
llvm::BasicBlock *createBasicBlock(const Twine &name = "",
                                   llvm::Function *parent = nullptr,
                                   llvm::BasicBlock *before = nullptr) {
  return llvm::BasicBlock::Create(getLLVMContext(), name, parent, before);
}

/// getBasicBlockForLabel - Return the LLVM basicblock that the specified
/// label maps to.
JumpDest getJumpDestForLabel(const LabelDecl *S);

/// SimplifyForwardingBlocks - If the given basic block is only a branch to
/// another basic block, simplify it. This assumes that no other code could
/// potentially reference the basic block.
void SimplifyForwardingBlocks(llvm::BasicBlock *BB);

/// EmitBlock - Emit the given block \arg BB and set it as the insert point,
/// adding a fall-through branch from the current insert block if
/// necessary. It is legal to call this function even if there is no current
/// insertion point.
///
/// IsFinished - If true, indicates that the caller has finished emitting
/// branches to the given block and does not expect to emit code into it. This
/// means the block can be ignored if it is unreachable.
void EmitBlock(llvm::BasicBlock *BB, bool IsFinished=false);

/// EmitBlockAfterUses - Emit the given block somewhere hopefully
/// near its uses, and leave the insertion point in it.
void EmitBlockAfterUses(llvm::BasicBlock *BB);

/// EmitBranch - Emit a branch to the specified basic block from the current
/// insert block, taking care to avoid creation of branches from dummy
/// blocks. It is legal to call this function even if there is no current
/// insertion point.
///
/// This function clears the current insertion point. The caller should follow
/// calls to this function with calls to Emit*Block prior to generation new
/// code.
void EmitBranch(llvm::BasicBlock *Block);

/// HaveInsertPoint - True if an insertion point is defined. If not, this
/// indicates that the current code being emitted is unreachable.
bool HaveInsertPoint() const {
  return Builder.GetInsertBlock() != nullptr;
}

/// EnsureInsertPoint - Ensure that an insertion point is defined so that
/// emitted IR has a place to go. Note that by definition, if this function
/// creates a block then that block is unreachable; callers may do better to
/// detect when no insertion point is defined and simply skip IR generation.
void EnsureInsertPoint() {
  if (!HaveInsertPoint())
    EmitBlock(createBasicBlock());
}

/// ErrorUnsupported - Print out an error that codegen doesn't support the
/// specified stmt yet.
void ErrorUnsupported(const Stmt *S, const char *Type);

//===--------------------------------------------------------------------===//
//                                  Helpers
//===--------------------------------------------------------------------===//

LValue MakeAddrLValue(Address Addr, QualType T,
                      AlignmentSource Source = AlignmentSource::Type) {
  return LValue::MakeAddr(Addr, T, getContext(), LValueBaseInfo(Source),
                          CGM.getTBAAAccessInfo(T));
}

LValue MakeAddrLValue(Address Addr, QualType T, LValueBaseInfo BaseInfo,
                      TBAAAccessInfo TBAAInfo) {
  return LValue::MakeAddr(Addr, T, getContext(), BaseInfo, TBAAInfo);
}

LValue MakeAddrLValue(llvm::Value *V, QualType T, CharUnits Alignment,
                      AlignmentSource Source = AlignmentSource::Type) {
  return LValue::MakeAddr(Address(V, Alignment), T, getContext(),
                          LValueBaseInfo(Source), CGM.getTBAAAccessInfo(T));
}

LValue MakeAddrLValue(llvm::Value *V, QualType T, CharUnits Alignment,
                      LValueBaseInfo BaseInfo, TBAAAccessInfo TBAAInfo) {
  return LValue::MakeAddr(Address(V, Alignment), T, getContext(),
                          BaseInfo, TBAAInfo);
}

LValue MakeNaturalAlignPointeeAddrLValue(llvm::Value *V, QualType T);
LValue MakeNaturalAlignAddrLValue(llvm::Value *V, QualType T);
CharUnits getNaturalTypeAlignment(QualType T,
                                  LValueBaseInfo *BaseInfo = nullptr,
                                  TBAAAccessInfo *TBAAInfo = nullptr,
                                  bool forPointeeType = false);
CharUnits getNaturalPointeeTypeAlignment(QualType T,
                                         LValueBaseInfo *BaseInfo = nullptr,
                                         TBAAAccessInfo *TBAAInfo = nullptr);

Address EmitLoadOfReference(LValue RefLVal,
                            LValueBaseInfo *PointeeBaseInfo = nullptr,
                            TBAAAccessInfo *PointeeTBAAInfo = nullptr);
LValue EmitLoadOfReferenceLValue(LValue RefLVal);
LValue EmitLoadOfReferenceLValue(Address RefAddr, QualType RefTy,
                                 AlignmentSource Source =
                                     AlignmentSource::Type) {
  LValue RefLVal = MakeAddrLValue(RefAddr, RefTy, LValueBaseInfo(Source),
                                  CGM.getTBAAAccessInfo(RefTy));
  return EmitLoadOfReferenceLValue(RefLVal);
}

Address EmitLoadOfPointer(Address Ptr, const PointerType *PtrTy,
                          LValueBaseInfo *BaseInfo = nullptr,
                          TBAAAccessInfo *TBAAInfo = nullptr);
LValue EmitLoadOfPointerLValue(Address Ptr, const PointerType *PtrTy);

/// CreateTempAlloca - This creates an alloca and inserts it into the entry
/// block if \p ArraySize is nullptr, otherwise inserts it at the current
/// insertion point of the builder. The caller is responsible for setting an
/// appropriate alignment on
/// the alloca.
///
/// \p ArraySize is the number of array elements to be allocated if it
///    is not nullptr.
///
/// LangAS::Default is the address space of pointers to local variables and
/// temporaries, as exposed in the source language. In certain
/// configurations, this is not the same as the alloca address space, and a
/// cast is needed to lift the pointer from the alloca AS into
/// LangAS::Default. This can happen when the target uses a restricted
/// address space for the stack but the source language requires
/// LangAS::Default to be a generic address space. The latter condition is
/// common for most programming languages; OpenCL is an exception in that
/// LangAS::Default is the private address space, which naturally maps
/// to the stack.
///
/// Because the address of a temporary is often exposed to the program in
/// various ways, this function will perform the cast. The original alloca
/// instruction is returned through \p Alloca if it is not nullptr.
///
/// The cast is not performaed in CreateTempAllocaWithoutCast. This is
/// more efficient if the caller knows that the address will not be exposed.
llvm::AllocaInst *CreateTempAlloca(llvm::Type *Ty, const Twine &Name = "tmp",
                                   llvm::Value *ArraySize = nullptr);
Address CreateTempAlloca(llvm::Type *Ty, CharUnits align,
                         const Twine &Name = "tmp",
                         llvm::Value *ArraySize = nullptr,
                         Address *Alloca = nullptr);
Address CreateTempAllocaWithoutCast(llvm::Type *Ty, CharUnits align,
                                    const Twine &Name = "tmp",
                                    llvm::Value *ArraySize = nullptr);

/// CreateDefaultAlignedTempAlloca - This creates an alloca with the
/// default ABI alignment of the given LLVM type.
///
/// IMPORTANT NOTE: This is *not* generally the right alignment for
/// any given AST type that happens to have been lowered to the
/// given IR type.  This should only ever be used for function-local,
/// IR-driven manipulations like saving and restoring a value.  Do
/// not hand this address off to arbitrary IRGen routines, and especially
/// do not pass it as an argument to a function that might expect a
/// properly ABI-aligned value.
Address CreateDefaultAlignTempAlloca(llvm::Type *Ty,
                                     const Twine &Name = "tmp");

/// InitTempAlloca - Provide an initial value for the given alloca which
/// will be observable at all locations in the function.
///
/// The address should be something that was returned from one of
/// the CreateTempAlloca or CreateMemTemp routines, and the
/// initializer must be valid in the entry block (i.e. it must
/// either be a constant or an argument value).
void InitTempAlloca(Address Alloca, llvm::Value *Value);

/// CreateIRTemp - Create a temporary IR object of the given type, with
/// appropriate alignment. This routine should only be used when an temporary
/// value needs to be stored into an alloca (for example, to avoid explicit
/// PHI construction), but the type is the IR type, not the type appropriate
/// for storing in memory.
///
/// That is, this is exactly equivalent to CreateMemTemp, but calling
/// ConvertType instead of ConvertTypeForMem.
Address CreateIRTemp(QualType T, const Twine &Name = "tmp");

/// CreateMemTemp - Create a temporary memory object of the given type, with
/// appropriate alignmen and cast it to the default address space. Returns
/// the original alloca instruction by \p Alloca if it is not nullptr.
Address CreateMemTemp(QualType T, const Twine &Name = "tmp",
                      Address *Alloca = nullptr);
Address CreateMemTemp(QualType T, CharUnits Align, const Twine &Name = "tmp",
                      Address *Alloca = nullptr);

/// CreateMemTemp - Create a temporary memory object of the given type, with
/// appropriate alignmen without casting it to the default address space.
Address CreateMemTempWithoutCast(QualType T, const Twine &Name = "tmp");
Address CreateMemTempWithoutCast(QualType T, CharUnits Align,
                                 const Twine &Name = "tmp");

/// CreateAggTemp - Create a temporary memory object for the given
/// aggregate type.
AggValueSlot CreateAggTemp(QualType T, const Twine &Name = "tmp") {
  return AggValueSlot::forAddr(CreateMemTemp(T, Name),
                               T.getQualifiers(),
                               AggValueSlot::IsNotDestructed,
                               AggValueSlot::DoesNotNeedGCBarriers,
                               AggValueSlot::IsNotAliased,
                               AggValueSlot::DoesNotOverlap);
}

/// Emit a cast to void* in the appropriate address space.
llvm::Value *EmitCastToVoidPtr(llvm::Value *value);

/// EvaluateExprAsBool - Perform the usual unary conversions on the specified
/// expression and compare the result against zero, returning an Int1Ty value.
llvm::Value *EvaluateExprAsBool(const Expr *E);

/// EmitIgnoredExpr - Emit an expression in a context which ignores the result.
void EmitIgnoredExpr(const Expr *E);

/// EmitAnyExpr - Emit code to compute the specified expression which can have
/// any type.  The result is returned as an RValue struct.  If this is an
/// aggregate expression, the aggloc/agglocvolatile arguments indicate where
/// the result should be returned.
///
/// \param ignoreResult True if the resulting value isn't used.
RValue EmitAnyExpr(const Expr *E,
                   AggValueSlot aggSlot = AggValueSlot::ignored(),
                   bool ignoreResult = false);

// EmitVAListRef - Emit a "reference" to a va_list; this is either the address
// or the value of the expression, depending on how va_list is defined.
Address EmitVAListRef(const Expr *E);

/// Emit a "reference" to a __builtin_ms_va_list; this is
/// always the value of the expression, because a __builtin_ms_va_list is a
/// pointer to a char.
Address EmitMSVAListRef(const Expr *E);

/// EmitAnyExprToTemp - Similarly to EmitAnyExpr(), however, the result will
/// always be accessible even if no aggregate location is provided.
RValue EmitAnyExprToTemp(const Expr *E);

/// EmitAnyExprToMem - Emits the code necessary to evaluate an
/// arbitrary expression into the given memory location.
void EmitAnyExprToMem(const Expr *E, Address Location,
                      Qualifiers Quals, bool IsInitializer);

void EmitAnyExprToExn(const Expr *E, Address Addr);

/// EmitExprAsInit - Emits the code necessary to initialize a
/// location in memory with the given initializer.
void EmitExprAsInit(const Expr *init, const ValueDecl *D, LValue lvalue,
                    bool capturedByInit);

/// hasVolatileMember - returns true if aggregate type has a volatile
/// member.
bool hasVolatileMember(QualType T) {
  if (const RecordType *RT = T->getAs<RecordType>()) {
    const RecordDecl *RD = cast<RecordDecl>(RT->getDecl());
    return RD->hasVolatileMember();
  }
  return false;
}

/// Determine whether a return value slot may overlap some other object.
AggValueSlot::Overlap_t getOverlapForReturnValue() {
  // FIXME: Assuming no overlap here breaks guaranteed copy elision for base
  // class subobjects. These cases may need to be revisited depending on the
  // resolution of the relevant core issue.
  return AggValueSlot::DoesNotOverlap;
}

/// Determine whether a field initialization may overlap some other object.
AggValueSlot::Overlap_t getOverlapForFieldInit(const FieldDecl *FD);

/// Determine whether a base class initialization may overlap some other
/// object.
AggValueSlot::Overlap_t getOverlapForBaseInit(const CXXRecordDecl *RD,
                                              const CXXRecordDecl *BaseRD,
                                              bool IsVirtual);

/// Emit an aggregate assignment.
void EmitAggregateAssign(LValue Dest, LValue Src, QualType EltTy) {
  bool IsVolatile = hasVolatileMember(EltTy);
  EmitAggregateCopy(Dest, Src, EltTy, AggValueSlot::MayOverlap, IsVolatile);
}

void EmitAggregateCopyCtor(LValue Dest, LValue Src,
                           AggValueSlot::Overlap_t MayOverlap) {
  EmitAggregateCopy(Dest, Src, Src.getType(), MayOverlap);
}

/// EmitAggregateCopy - Emit an aggregate copy.
///
/// \param isVolatile \c true iff either the source or the destination is
///        volatile.
/// \param MayOverlap Whether the tail padding of the destination might be
///        occupied by some other object. More efficient code can often be
///        generated if not.
void EmitAggregateCopy(LValue Dest, LValue Src, QualType EltTy,
                       AggValueSlot::Overlap_t MayOverlap,
                       bool isVolatile = false);

/// GetAddrOfLocalVar - Return the address of a local variable.
Address GetAddrOfLocalVar(const VarDecl *VD) {
  auto it = LocalDeclMap.find(VD);
  assert(it != LocalDeclMap.end() &&((it != LocalDeclMap.end() && "Invalid argument to GetAddrOfLocalVar(), no decl!"
) ? static_cast<void> (0) : __assert_fail ("it != LocalDeclMap.end() && \"Invalid argument to GetAddrOfLocalVar(), no decl!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 2364, __PRETTY_FUNCTION__))
         "Invalid argument to GetAddrOfLocalVar(), no decl!")((it != LocalDeclMap.end() && "Invalid argument to GetAddrOfLocalVar(), no decl!"
) ? static_cast<void> (0) : __assert_fail ("it != LocalDeclMap.end() && \"Invalid argument to GetAddrOfLocalVar(), no decl!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 2364, __PRETTY_FUNCTION__));
  return it->second;
}

/// Given an opaque value expression, return its LValue mapping if it exists,
/// otherwise create one.
LValue getOrCreateOpaqueLValueMapping(const OpaqueValueExpr *e);

/// Given an opaque value expression, return its RValue mapping if it exists,
/// otherwise create one.
RValue getOrCreateOpaqueRValueMapping(const OpaqueValueExpr *e);

/// Get the index of the current ArrayInitLoopExpr, if any.
llvm::Value *getArrayInitIndex() { return ArrayInitIndex; }

/// getAccessedFieldNo - Given an encoded value and a result number, return
/// the input field number being accessed.
static unsigned getAccessedFieldNo(unsigned Idx, const llvm::Constant *Elts);

llvm::BlockAddress *GetAddrOfLabel(const LabelDecl *L);
llvm::BasicBlock *GetIndirectGotoBlock();

/// Check if \p E is a C++ "this" pointer wrapped in value-preserving casts.
static bool IsWrappedCXXThis(const Expr *E);

/// EmitNullInitialization - Generate code to set a value of the given type to
/// null, If the type contains data member pointers, they will be initialized
/// to -1 in accordance with the Itanium C++ ABI.
void EmitNullInitialization(Address DestPtr, QualType Ty);

/// Emits a call to an LLVM variable-argument intrinsic, either
/// \c llvm.va_start or \c llvm.va_end.
/// \param ArgValue A reference to the \c va_list as emitted by either
/// \c EmitVAListRef or \c EmitMSVAListRef.
/// \param IsStart If \c true, emits a call to \c llvm.va_start; otherwise,
/// calls \c llvm.va_end.
llvm::Value *EmitVAStartEnd(llvm::Value *ArgValue, bool IsStart);

/// Generate code to get an argument from the passed in pointer
/// and update it accordingly.
/// \param VE The \c VAArgExpr for which to generate code.
/// \param VAListAddr Receives a reference to the \c va_list as emitted by
/// either \c EmitVAListRef or \c EmitMSVAListRef.
/// \returns A pointer to the argument.
// FIXME: We should be able to get rid of this method and use the va_arg
// instruction in LLVM instead once it works well enough.
Address EmitVAArg(VAArgExpr *VE, Address &VAListAddr);

/// emitArrayLength - Compute the length of an array, even if it's a
/// VLA, and drill down to the base element type.
llvm::Value *emitArrayLength(const ArrayType *arrayType,
                             QualType &baseType,
                             Address &addr);

/// EmitVLASize - Capture all the sizes for the VLA expressions in
/// the given variably-modified type and store them in the VLASizeMap.
///
/// This function can be called with a null (unreachable) insert point.
void EmitVariablyModifiedType(QualType Ty);

struct VlaSizePair {
  llvm::Value *NumElts;
  QualType Type;

  VlaSizePair(llvm::Value *NE, QualType T) : NumElts(NE), Type(T) {}
};

/// Return the number of elements for a single dimension
/// for the given array type.
VlaSizePair getVLAElements1D(const VariableArrayType *vla);
VlaSizePair getVLAElements1D(QualType vla);

/// Returns an LLVM value that corresponds to the size,
/// in non-variably-sized elements, of a variable length array type,
/// plus that largest non-variably-sized element type.  Assumes that
/// the type has already been emitted with EmitVariablyModifiedType.
VlaSizePair getVLASize(const VariableArrayType *vla);
VlaSizePair getVLASize(QualType vla);

/// LoadCXXThis - Load the value of 'this'. This function is only valid while
/// generating code for an C++ member function.
llvm::Value *LoadCXXThis() {
  assert(CXXThisValue && "no 'this' value for this function")((CXXThisValue && "no 'this' value for this function"
) ? static_cast<void> (0) : __assert_fail ("CXXThisValue && \"no 'this' value for this function\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 2446, __PRETTY_FUNCTION__));
  return CXXThisValue;
}
Address LoadCXXThisAddress();

/// LoadCXXVTT - Load the VTT parameter to base constructors/destructors have
/// virtual bases.
// FIXME: Every place that calls LoadCXXVTT is something
// that needs to be abstracted properly.
llvm::Value *LoadCXXVTT() {
  assert(CXXStructorImplicitParamValue && "no VTT value for this function")((CXXStructorImplicitParamValue && "no VTT value for this function"
) ? static_cast<void> (0) : __assert_fail ("CXXStructorImplicitParamValue && \"no VTT value for this function\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 2456, __PRETTY_FUNCTION__));
  return CXXStructorImplicitParamValue;
}

/// GetAddressOfBaseOfCompleteClass - Convert the given pointer to a
/// complete class to the given direct base.
Address
GetAddressOfDirectBaseInCompleteClass(Address Value,
                                      const CXXRecordDecl *Derived,
                                      const CXXRecordDecl *Base,
                                      bool BaseIsVirtual);

static bool ShouldNullCheckClassCastValue(const CastExpr *Cast);

/// GetAddressOfBaseClass - This function will add the necessary delta to the
/// load of 'this' and returns address of the base class.
Address GetAddressOfBaseClass(Address Value,
                              const CXXRecordDecl *Derived,
                              CastExpr::path_const_iterator PathBegin,
                              CastExpr::path_const_iterator PathEnd,
                              bool NullCheckValue, SourceLocation Loc);

Address GetAddressOfDerivedClass(Address Value,
                                 const CXXRecordDecl *Derived,
                                 CastExpr::path_const_iterator PathBegin,
                                 CastExpr::path_const_iterator PathEnd,
                                 bool NullCheckValue);

/// GetVTTParameter - Return the VTT parameter that should be passed to a
/// base constructor/destructor with virtual bases.
/// FIXME: VTTs are Itanium ABI-specific, so the definition should move
/// to ItaniumCXXABI.cpp together with all the references to VTT.
llvm::Value *GetVTTParameter(GlobalDecl GD, bool ForVirtualBase,
                             bool Delegating);

void EmitDelegateCXXConstructorCall(const CXXConstructorDecl *Ctor,
                                    CXXCtorType CtorType,
                                    const FunctionArgList &Args,
                                    SourceLocation Loc);
// It's important not to confuse this and the previous function. Delegating
// constructors are the C++0x feature. The constructor delegate optimization
// is used to reduce duplication in the base and complete consturctors where
// they are substantially the same.
void EmitDelegatingCXXConstructorCall(const CXXConstructorDecl *Ctor,
                                      const FunctionArgList &Args);

/// Emit a call to an inheriting constructor (that is, one that invokes a
/// constructor inherited from a base class) by inlining its definition. This
/// is necessary if the ABI does not support forwarding the arguments to the
/// base class constructor (because they're variadic or similar).
void EmitInlinedInheritingCXXConstructorCall(const CXXConstructorDecl *Ctor,
                                             CXXCtorType CtorType,
                                             bool ForVirtualBase,
                                             bool Delegating,
                                             CallArgList &Args);

/// Emit a call to a constructor inherited from a base class, passing the
/// current constructor's arguments along unmodified (without even making
/// a copy).
void EmitInheritedCXXConstructorCall(const CXXConstructorDecl *D,
                                     bool ForVirtualBase, Address This,
                                     bool InheritedFromVBase,
                                     const CXXInheritedCtorInitExpr *E);

void EmitCXXConstructorCall(const CXXConstructorDecl *D, CXXCtorType Type,
                            bool ForVirtualBase, bool Delegating,
                            AggValueSlot ThisAVS, const CXXConstructExpr *E);

void EmitCXXConstructorCall(const CXXConstructorDecl *D, CXXCtorType Type,
                            bool ForVirtualBase, bool Delegating,
                            Address This, CallArgList &Args,
                            AggValueSlot::Overlap_t Overlap,
                            SourceLocation Loc, bool NewPointerIsChecked);

/// Emit assumption load for all bases. Requires to be be called only on
/// most-derived class and not under construction of the object.
void EmitVTableAssumptionLoads(const CXXRecordDecl *ClassDecl, Address This);

/// Emit assumption that vptr load == global vtable.
void EmitVTableAssumptionLoad(const VPtr &vptr, Address This);

void EmitSynthesizedCXXCopyCtorCall(const CXXConstructorDecl *D,
                                    Address This, Address Src,
                                    const CXXConstructExpr *E);

void EmitCXXAggrConstructorCall(const CXXConstructorDecl *D,
                                const ArrayType *ArrayTy,
                                Address ArrayPtr,
                                const CXXConstructExpr *E,
                                bool NewPointerIsChecked,
                                bool ZeroInitialization = false);

void EmitCXXAggrConstructorCall(const CXXConstructorDecl *D,
                                llvm::Value *NumElements,
                                Address ArrayPtr,
                                const CXXConstructExpr *E,
                                bool NewPointerIsChecked,
                                bool ZeroInitialization = false);

static Destroyer destroyCXXObject;

void EmitCXXDestructorCall(const CXXDestructorDecl *D, CXXDtorType Type,
                           bool ForVirtualBase, bool Delegating, Address This,
                           QualType ThisTy);

void EmitNewArrayInitializer(const CXXNewExpr *E, QualType elementType,
                             llvm::Type *ElementTy, Address NewPtr,
                             llvm::Value *NumElements,
                             llvm::Value *AllocSizeWithoutCookie);

void EmitCXXTemporary(const CXXTemporary *Temporary, QualType TempType,
                      Address Ptr);

llvm::Value *EmitLifetimeStart(uint64_t Size, llvm::Value *Addr);
void EmitLifetimeEnd(llvm::Value *Size, llvm::Value *Addr);

llvm::Value *EmitCXXNewExpr(const CXXNewExpr *E);
void EmitCXXDeleteExpr(const CXXDeleteExpr *E);

void EmitDeleteCall(const FunctionDecl *DeleteFD, llvm::Value *Ptr,
                    QualType DeleteTy, llvm::Value *NumElements = nullptr,
                    CharUnits CookieSize = CharUnits());

RValue EmitBuiltinNewDeleteCall(const FunctionProtoType *Type,
                                const CallExpr *TheCallExpr, bool IsDelete);

llvm::Value *EmitCXXTypeidExpr(const CXXTypeidExpr *E);
llvm::Value *EmitDynamicCast(Address V, const CXXDynamicCastExpr *DCE);
Address EmitCXXUuidofExpr(const CXXUuidofExpr *E);

/// Situations in which we might emit a check for the suitability of a
///        pointer or glvalue.
enum TypeCheckKind {
  /// Checking the operand of a load. Must be suitably sized and aligned.
  TCK_Load,
  /// Checking the destination of a store. Must be suitably sized and aligned.
  TCK_Store,
  /// Checking the bound value in a reference binding. Must be suitably sized
  /// and aligned, but is not required to refer to an object (until the
  /// reference is used), per core issue 453.
  TCK_ReferenceBinding,
  /// Checking the object expression in a non-static data member access. Must
  /// be an object within its lifetime.
  TCK_MemberAccess,
  /// Checking the 'this' pointer for a call to a non-static member function.
  /// Must be an object within its lifetime.
  TCK_MemberCall,
  /// Checking the 'this' pointer for a constructor call.
  TCK_ConstructorCall,
  /// Checking the operand of a static_cast to a derived pointer type. Must be
  /// null or an object within its lifetime.
  TCK_DowncastPointer,
  /// Checking the operand of a static_cast to a derived reference type. Must
  /// be an object within its lifetime.
  TCK_DowncastReference,
  /// Checking the operand of a cast to a base object. Must be suitably sized
  /// and aligned.
  TCK_Upcast,
  /// Checking the operand of a cast to a virtual base object. Must be an
  /// object within its lifetime.
  TCK_UpcastToVirtualBase,
  /// Checking the value assigned to a _Nonnull pointer. Must not be null.
  TCK_NonnullAssign,
  /// Checking the operand of a dynamic_cast or a typeid expression.  Must be
  /// null or an object within its lifetime.
  TCK_DynamicOperation
};

/// Determine whether the pointer type check \p TCK permits null pointers.
static bool isNullPointerAllowed(TypeCheckKind TCK);

/// Determine whether the pointer type check \p TCK requires a vptr check.
static bool isVptrCheckRequired(TypeCheckKind TCK, QualType Ty);

/// Whether any type-checking sanitizers are enabled. If \c false,
/// calls to EmitTypeCheck can be skipped.
bool sanitizePerformTypeCheck() const;

/// Emit a check that \p V is the address of storage of the
/// appropriate size and alignment for an object of type \p Type
/// (or if ArraySize is provided, for an array of that bound).
void EmitTypeCheck(TypeCheckKind TCK, SourceLocation Loc, llvm::Value *V,
                   QualType Type, CharUnits Alignment = CharUnits::Zero(),
                   SanitizerSet SkippedChecks = SanitizerSet(),
                   llvm::Value *ArraySize = nullptr);

/// Emit a check that \p Base points into an array object, which
/// we can access at index \p Index. \p Accessed should be \c false if we
/// this expression is used as an lvalue, for instance in "&Arr[Idx]".
void EmitBoundsCheck(const Expr *E, const Expr *Base, llvm::Value *Index,
                     QualType IndexType, bool Accessed);

llvm::Value *EmitScalarPrePostIncDec(const UnaryOperator *E, LValue LV,
                                     bool isInc, bool isPre);
ComplexPairTy EmitComplexPrePostIncDec(const UnaryOperator *E, LValue LV,
                                       bool isInc, bool isPre);

/// Converts Location to a DebugLoc, if debug information is enabled.
llvm::DebugLoc SourceLocToDebugLoc(SourceLocation Location);

/// Get the record field index as represented in debug info.
unsigned getDebugInfoFIndex(const RecordDecl *Rec, unsigned FieldIndex);


//===--------------------------------------------------------------------===//
//                            Declaration Emission
//===--------------------------------------------------------------------===//

/// EmitDecl - Emit a declaration.
///
/// This function can be called with a null (unreachable) insert point.
void EmitDecl(const Decl &D);

/// EmitVarDecl - Emit a local variable declaration.
///
/// This function can be called with a null (unreachable) insert point.
void EmitVarDecl(const VarDecl &D);

void EmitScalarInit(const Expr *init, const ValueDecl *D, LValue lvalue,
                    bool capturedByInit);

typedef void SpecialInitFn(CodeGenFunction &Init, const VarDecl &D,
                           llvm::Value *Address);

/// Determine whether the given initializer is trivial in the sense
/// that it requires no code to be generated.
bool isTrivialInitializer(const Expr *Init);

/// EmitAutoVarDecl - Emit an auto variable declaration.
///
/// This function can be called with a null (unreachable) insert point.
void EmitAutoVarDecl(const VarDecl &D);

class AutoVarEmission {
  friend class CodeGenFunction;

  const VarDecl *Variable;

  /// The address of the alloca for languages with explicit address space
  /// (e.g. OpenCL) or alloca casted to generic pointer for address space
  /// agnostic languages (e.g. C++). Invalid if the variable was emitted
  /// as a global constant.
  Address Addr;

  llvm::Value *NRVOFlag;

  /// True if the variable is a __block variable that is captured by an
  /// escaping block.
  bool IsEscapingByRef;

  /// True if the variable is of aggregate type and has a constant
  /// initializer.
  bool IsConstantAggregate;

  /// Non-null if we should use lifetime annotations.
  llvm::Value *SizeForLifetimeMarkers;

  /// Address with original alloca instruction. Invalid if the variable was
  /// emitted as a global constant.
  Address AllocaAddr;

  struct Invalid {};
  AutoVarEmission(Invalid)
      : Variable(nullptr), Addr(Address::invalid()),
        AllocaAddr(Address::invalid()) {}

  AutoVarEmission(const VarDecl &variable)
      : Variable(&variable), Addr(Address::invalid()), NRVOFlag(nullptr),
        IsEscapingByRef(false), IsConstantAggregate(false),
        SizeForLifetimeMarkers(nullptr), AllocaAddr(Address::invalid()) {}

  bool wasEmittedAsGlobal() const { return !Addr.isValid(); }

public:
  static AutoVarEmission invalid() { return AutoVarEmission(Invalid()); }

  bool useLifetimeMarkers() const {
    return SizeForLifetimeMarkers != nullptr;
  }
  llvm::Value *getSizeForLifetimeMarkers() const {
    assert(useLifetimeMarkers())((useLifetimeMarkers()) ? static_cast<void> (0) : __assert_fail
 ("useLifetimeMarkers()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 2736, __PRETTY_FUNCTION__));
    return SizeForLifetimeMarkers;
  }

  /// Returns the raw, allocated address, which is not necessarily
  /// the address of the object itself. It is casted to default
  /// address space for address space agnostic languages.
  Address getAllocatedAddress() const {
    return Addr;
  }

  /// Returns the address for the original alloca instruction.
  Address getOriginalAllocatedAddress() const { return AllocaAddr; }

  /// Returns the address of the object within this declaration.
  /// Note that this does not chase the forwarding pointer for
  /// __block decls.
  Address getObjectAddress(CodeGenFunction &CGF) const {
    if (!IsEscapingByRef) return Addr;

    return CGF.emitBlockByrefAddress(Addr, Variable, /*forward*/ false);
  }
};
AutoVarEmission EmitAutoVarAlloca(const VarDecl &var);
void EmitAutoVarInit(const AutoVarEmission &emission);
void EmitAutoVarCleanups(const AutoVarEmission &emission);
void emitAutoVarTypeCleanup(const AutoVarEmission &emission,
                            QualType::DestructionKind dtorKind);

/// Emits the alloca and debug information for the size expressions for each
/// dimension of an array. It registers the association of its (1-dimensional)
/// QualTypes and size expression's debug node, so that CGDebugInfo can
/// reference this node when creating the DISubrange object to describe the
/// array types.
void EmitAndRegisterVariableArrayDimensions(CGDebugInfo *DI,
                                            const VarDecl &D,
                                            bool EmitDebugInfo);

void EmitStaticVarDecl(const VarDecl &D,
                       llvm::GlobalValue::LinkageTypes Linkage);

class ParamValue {
  llvm::Value *Value;
  unsigned Alignment;
  ParamValue(llvm::Value *V, unsigned A) : Value(V), Alignment(A) {}
public:
  static ParamValue forDirect(llvm::Value *value) {
    return ParamValue(value, 0);
  }
  static ParamValue forIndirect(Address addr) {
    assert(!addr.getAlignment().isZero())((!addr.getAlignment().isZero()) ? static_cast<void> (0
) : __assert_fail ("!addr.getAlignment().isZero()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 2786, __PRETTY_FUNCTION__));
    return ParamValue(addr.getPointer(), addr.getAlignment().getQuantity());
  }

  bool isIndirect() const { return Alignment != 0; }
7
←
Assuming field 'Alignment' is not equal to 0→
8
←
Returning the value 1, which participates in a condition later→
  llvm::Value *getAnyValue() const { return Value; }

  llvm::Value *getDirectValue() const {
    assert(!isIndirect())((!isIndirect()) ? static_cast<void> (0) : __assert_fail
 ("!isIndirect()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 2794, __PRETTY_FUNCTION__));
    return Value;
  }

  Address getIndirectAddress() const {
    assert(isIndirect())((isIndirect()) ? static_cast<void> (0) : __assert_fail
 ("isIndirect()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 2799, __PRETTY_FUNCTION__));
    return Address(Value, CharUnits::fromQuantity(Alignment));
  }
};

/// EmitParmDecl - Emit a ParmVarDecl or an ImplicitParamDecl.
void EmitParmDecl(const VarDecl &D, ParamValue Arg, unsigned ArgNo);

/// protectFromPeepholes - Protect a value that we're intending to
/// store to the side, but which will probably be used later, from
/// aggressive peepholing optimizations that might delete it.
///
/// Pass the result to unprotectFromPeepholes to declare that
/// protection is no longer required.
///
/// There's no particular reason why this shouldn't apply to
/// l-values, it's just that no existing peepholes work on pointers.
PeepholeProtection protectFromPeepholes(RValue rvalue);
void unprotectFromPeepholes(PeepholeProtection protection);

void EmitAlignmentAssumptionCheck(llvm::Value *Ptr, QualType Ty,
                                  SourceLocation Loc,
                                  SourceLocation AssumptionLoc,
                                  llvm::Value *Alignment,
                                  llvm::Value *OffsetValue,
                                  llvm::Value *TheCheck,
                                  llvm::Instruction *Assumption);

void EmitAlignmentAssumption(llvm::Value *PtrValue, QualType Ty,
                             SourceLocation Loc, SourceLocation AssumptionLoc,
                             llvm::Value *Alignment,
                             llvm::Value *OffsetValue = nullptr);

void EmitAlignmentAssumption(llvm::Value *PtrValue, QualType Ty,
                             SourceLocation Loc, SourceLocation AssumptionLoc,
                             unsigned Alignment,
                             llvm::Value *OffsetValue = nullptr);

void EmitAlignmentAssumption(llvm::Value *PtrValue, const Expr *E,
                             SourceLocation AssumptionLoc, unsigned Alignment,
                             llvm::Value *OffsetValue = nullptr);

//===--------------------------------------------------------------------===//
//                             Statement Emission
//===--------------------------------------------------------------------===//

/// EmitStopPoint - Emit a debug stoppoint if we are emitting debug info.
void EmitStopPoint(const Stmt *S);

/// EmitStmt - Emit the code for the statement \arg S. It is legal to call
/// this function even if there is no current insertion point.
///
/// This function may clear the current insertion point; callers should use
/// EnsureInsertPoint if they wish to subsequently generate code without first
/// calling EmitBlock, EmitBranch, or EmitStmt.
void EmitStmt(const Stmt *S, ArrayRef<const Attr *> Attrs = None);

/// EmitSimpleStmt - Try to emit a "simple" statement which does not
/// necessarily require an insertion point or debug information; typically
/// because the statement amounts to a jump or a container of other
/// statements.
///
/// \return True if the statement was handled.
bool EmitSimpleStmt(const Stmt *S);

Address EmitCompoundStmt(const CompoundStmt &S, bool GetLast = false,
                         AggValueSlot AVS = AggValueSlot::ignored());
Address EmitCompoundStmtWithoutScope(const CompoundStmt &S,
                                     bool GetLast = false,
                                     AggValueSlot AVS =
                                              AggValueSlot::ignored());

/// EmitLabel - Emit the block for the given label. It is legal to call this
/// function even if there is no current insertion point.
void EmitLabel(const LabelDecl *D); // helper for EmitLabelStmt.

void EmitLabelStmt(const LabelStmt &S);
void EmitAttributedStmt(const AttributedStmt &S);
void EmitGotoStmt(const GotoStmt &S);
void EmitIndirectGotoStmt(const IndirectGotoStmt &S);
void EmitIfStmt(const IfStmt &S);

void EmitWhileStmt(const WhileStmt &S,
                   ArrayRef<const Attr *> Attrs = None);
void EmitDoStmt(const DoStmt &S, ArrayRef<const Attr *> Attrs = None);
void EmitForStmt(const ForStmt &S,
                 ArrayRef<const Attr *> Attrs = None);
void EmitReturnStmt(const ReturnStmt &S);
void EmitDeclStmt(const DeclStmt &S);
void EmitBreakStmt(const BreakStmt &S);
void EmitContinueStmt(const ContinueStmt &S);
void EmitSwitchStmt(const SwitchStmt &S);
void EmitDefaultStmt(const DefaultStmt &S);
void EmitCaseStmt(const CaseStmt &S);
void EmitCaseStmtRange(const CaseStmt &S);
void EmitAsmStmt(const AsmStmt &S);

void EmitObjCForCollectionStmt(const ObjCForCollectionStmt &S);
void EmitObjCAtTryStmt(const ObjCAtTryStmt &S);
void EmitObjCAtThrowStmt(const ObjCAtThrowStmt &S);
void EmitObjCAtSynchronizedStmt(const ObjCAtSynchronizedStmt &S);
void EmitObjCAutoreleasePoolStmt(const ObjCAutoreleasePoolStmt &S);

void EmitCoroutineBody(const CoroutineBodyStmt &S);
void EmitCoreturnStmt(const CoreturnStmt &S);
RValue EmitCoawaitExpr(const CoawaitExpr &E,
                       AggValueSlot aggSlot = AggValueSlot::ignored(),
                       bool ignoreResult = false);
LValue EmitCoawaitLValue(const CoawaitExpr *E);
RValue EmitCoyieldExpr(const CoyieldExpr &E,
                       AggValueSlot aggSlot = AggValueSlot::ignored(),
                       bool ignoreResult = false);
LValue EmitCoyieldLValue(const CoyieldExpr *E);
RValue EmitCoroutineIntrinsic(const CallExpr *E, unsigned int IID);

void EnterCXXTryStmt(const CXXTryStmt &S, bool IsFnTryBlock = false);
void ExitCXXTryStmt(const CXXTryStmt &S, bool IsFnTryBlock = false);

void EmitCXXTryStmt(const CXXTryStmt &S);
void EmitSEHTryStmt(const SEHTryStmt &S);
void EmitSEHLeaveStmt(const SEHLeaveStmt &S);
void EnterSEHTryStmt(const SEHTryStmt &S);
void ExitSEHTryStmt(const SEHTryStmt &S);

void pushSEHCleanup(CleanupKind kind,
                    llvm::Function *FinallyFunc);
void startOutlinedSEHHelper(CodeGenFunction &ParentCGF, bool IsFilter,
                            const Stmt *OutlinedStmt);

llvm::Function *GenerateSEHFilterFunction(CodeGenFunction &ParentCGF,
                                          const SEHExceptStmt &Except);

llvm::Function *GenerateSEHFinallyFunction(CodeGenFunction &ParentCGF,
                                           const SEHFinallyStmt &Finally);

void EmitSEHExceptionCodeSave(CodeGenFunction &ParentCGF,
                              llvm::Value *ParentFP,
                              llvm::Value *EntryEBP);
llvm::Value *EmitSEHExceptionCode();
llvm::Value *EmitSEHExceptionInfo();
llvm::Value *EmitSEHAbnormalTermination();

/// Emit simple code for OpenMP directives in Simd-only mode.
void EmitSimpleOMPExecutableDirective(const OMPExecutableDirective &D);

/// Scan the outlined statement for captures from the parent function. For
/// each capture, mark the capture as escaped and emit a call to
/// llvm.localrecover. Insert the localrecover result into the LocalDeclMap.
void EmitCapturedLocals(CodeGenFunction &ParentCGF, const Stmt *OutlinedStmt,
                        bool IsFilter);

/// Recovers the address of a local in a parent function. ParentVar is the
/// address of the variable used in the immediate parent function. It can
/// either be an alloca or a call to llvm.localrecover if there are nested
/// outlined functions. ParentFP is the frame pointer of the outermost parent
/// frame.
Address recoverAddrOfEscapedLocal(CodeGenFunction &ParentCGF,
                                  Address ParentVar,
                                  llvm::Value *ParentFP);

void EmitCXXForRangeStmt(const CXXForRangeStmt &S,
                         ArrayRef<const Attr *> Attrs = None);

/// Controls insertion of cancellation exit blocks in worksharing constructs.
class OMPCancelStackRAII {
  CodeGenFunction &CGF;

public:
  OMPCancelStackRAII(CodeGenFunction &CGF, OpenMPDirectiveKind Kind,
                     bool HasCancel)
      : CGF(CGF) {
    CGF.OMPCancelStack.enter(CGF, Kind, HasCancel);
  }
  ~OMPCancelStackRAII() { CGF.OMPCancelStack.exit(CGF); }
};

/// Returns calculated size of the specified type.
llvm::Value *getTypeSize(QualType Ty);
LValue InitCapturedStruct(const CapturedStmt &S);
llvm::Function *EmitCapturedStmt(const CapturedStmt &S, CapturedRegionKind K);
llvm::Function *GenerateCapturedStmtFunction(const CapturedStmt &S);
Address GenerateCapturedStmtArgument(const CapturedStmt &S);
llvm::Function *GenerateOpenMPCapturedStmtFunction(const CapturedStmt &S);
void GenerateOpenMPCapturedVars(const CapturedStmt &S,
                                SmallVectorImpl<llvm::Value *> &CapturedVars);
void emitOMPSimpleStore(LValue LVal, RValue RVal, QualType RValTy,
                        SourceLocation Loc);
/// Perform element by element copying of arrays with type \a
/// OriginalType from \a SrcAddr to \a DestAddr using copying procedure
/// generated by \a CopyGen.
///
/// \param DestAddr Address of the destination array.
/// \param SrcAddr Address of the source array.
/// \param OriginalType Type of destination and source arrays.
/// \param CopyGen Copying procedure that copies value of single array element
/// to another single array element.
void EmitOMPAggregateAssign(
    Address DestAddr, Address SrcAddr, QualType OriginalType,
    const llvm::function_ref<void(Address, Address)> CopyGen);
/// Emit proper copying of data from one variable to another.
///
/// \param OriginalType Original type of the copied variables.
/// \param DestAddr Destination address.
/// \param SrcAddr Source address.
/// \param DestVD Destination variable used in \a CopyExpr (for arrays, has
/// type of the base array element).
/// \param SrcVD Source variable used in \a CopyExpr (for arrays, has type of
/// the base array element).
/// \param Copy Actual copygin expression for copying data from \a SrcVD to \a
/// DestVD.
void EmitOMPCopy(QualType OriginalType,
                 Address DestAddr, Address SrcAddr,
                 const VarDecl *DestVD, const VarDecl *SrcVD,
                 const Expr *Copy);
/// Emit atomic update code for constructs: \a X = \a X \a BO \a E or
/// \a X = \a E \a BO \a E.
///
/// \param X Value to be updated.
/// \param E Update value.
/// \param BO Binary operation for update operation.
/// \param IsXLHSInRHSPart true if \a X is LHS in RHS part of the update
/// expression, false otherwise.
/// \param AO Atomic ordering of the generated atomic instructions.
/// \param CommonGen Code generator for complex expressions that cannot be
/// expressed through atomicrmw instruction.
/// \returns <true, OldAtomicValue> if simple 'atomicrmw' instruction was
/// generated, <false, RValue::get(nullptr)> otherwise.
std::pair<bool, RValue> EmitOMPAtomicSimpleUpdateExpr(
    LValue X, RValue E, BinaryOperatorKind BO, bool IsXLHSInRHSPart,
    llvm::AtomicOrdering AO, SourceLocation Loc,
    const llvm::function_ref<RValue(RValue)> CommonGen);
bool EmitOMPFirstprivateClause(const OMPExecutableDirective &D,
                               OMPPrivateScope &PrivateScope);
void EmitOMPPrivateClause(const OMPExecutableDirective &D,
                          OMPPrivateScope &PrivateScope);
void EmitOMPUseDevicePtrClause(
    const OMPClause &C, OMPPrivateScope &PrivateScope,
    const llvm::DenseMap<const ValueDecl *, Address> &CaptureDeviceAddrMap);
/// Emit code for copyin clause in \a D directive. The next code is
/// generated at the start of outlined functions for directives:
/// \code
/// threadprivate_var1 = master_threadprivate_var1;
/// operator=(threadprivate_var2, master_threadprivate_var2);
/// ...
/// __kmpc_barrier(&loc, global_tid);
/// \endcode
///
/// \param D OpenMP directive possibly with 'copyin' clause(s).
/// \returns true if at least one copyin variable is found, false otherwise.
bool EmitOMPCopyinClause(const OMPExecutableDirective &D);
/// Emit initial code for lastprivate variables. If some variable is
/// not also firstprivate, then the default initialization is used. Otherwise
/// initialization of this variable is performed by EmitOMPFirstprivateClause
/// method.
///
/// \param D Directive that may have 'lastprivate' directives.
/// \param PrivateScope Private scope for capturing lastprivate variables for
/// proper codegen in internal captured statement.
///
/// \returns true if there is at least one lastprivate variable, false
/// otherwise.
bool EmitOMPLastprivateClauseInit(const OMPExecutableDirective &D,
                                  OMPPrivateScope &PrivateScope);
/// Emit final copying of lastprivate values to original variables at
/// the end of the worksharing or simd directive.
///
/// \param D Directive that has at least one 'lastprivate' directives.
/// \param IsLastIterCond Boolean condition that must be set to 'i1 true' if
/// it is the last iteration of the loop code in associated directive, or to
/// 'i1 false' otherwise. If this item is nullptr, no final check is required.
void EmitOMPLastprivateClauseFinal(const OMPExecutableDirective &D,
                                   bool NoFinals,
                                   llvm::Value *IsLastIterCond = nullptr);
/// Emit initial code for linear clauses.
void EmitOMPLinearClause(const OMPLoopDirective &D,
                         CodeGenFunction::OMPPrivateScope &PrivateScope);
/// Emit final code for linear clauses.
/// \param CondGen Optional conditional code for final part of codegen for
/// linear clause.
void EmitOMPLinearClauseFinal(
    const OMPLoopDirective &D,
    const llvm::function_ref<llvm::Value *(CodeGenFunction &)> CondGen);
/// Emit initial code for reduction variables. Creates reduction copies
/// and initializes them with the values according to OpenMP standard.
///
/// \param D Directive (possibly) with the 'reduction' clause.
/// \param PrivateScope Private scope for capturing reduction variables for
/// proper codegen in internal captured statement.
///
void EmitOMPReductionClauseInit(const OMPExecutableDirective &D,
                                OMPPrivateScope &PrivateScope);
/// Emit final update of reduction values to original variables at
/// the end of the directive.
///
/// \param D Directive that has at least one 'reduction' directives.
/// \param ReductionKind The kind of reduction to perform.
void EmitOMPReductionClauseFinal(const OMPExecutableDirective &D,
                                 const OpenMPDirectiveKind ReductionKind);
/// Emit initial code for linear variables. Creates private copies
/// and initializes them with the values according to OpenMP standard.
///
/// \param D Directive (possibly) with the 'linear' clause.
/// \return true if at least one linear variable is found that should be
/// initialized with the value of the original variable, false otherwise.
bool EmitOMPLinearClauseInit(const OMPLoopDirective &D);

typedef const llvm::function_ref<void(CodeGenFunction & /*CGF*/,
                                      llvm::Function * /*OutlinedFn*/,
                                      const OMPTaskDataTy & /*Data*/)>
    TaskGenTy;
void EmitOMPTaskBasedDirective(const OMPExecutableDirective &S,
                               const OpenMPDirectiveKind CapturedRegion,
                               const RegionCodeGenTy &BodyGen,
                               const TaskGenTy &TaskGen, OMPTaskDataTy &Data);
struct OMPTargetDataInfo {
  Address BasePointersArray = Address::invalid();
  Address PointersArray = Address::invalid();
  Address SizesArray = Address::invalid();
  unsigned NumberOfTargetItems = 0;
  explicit OMPTargetDataInfo() = default;
  OMPTargetDataInfo(Address BasePointersArray, Address PointersArray,
                    Address SizesArray, unsigned NumberOfTargetItems)
      : BasePointersArray(BasePointersArray), PointersArray(PointersArray),
        SizesArray(SizesArray), NumberOfTargetItems(NumberOfTargetItems) {}
};
void EmitOMPTargetTaskBasedDirective(const OMPExecutableDirective &S,
                                     const RegionCodeGenTy &BodyGen,
                                     OMPTargetDataInfo &InputInfo);

void EmitOMPParallelDirective(const OMPParallelDirective &S);
void EmitOMPSimdDirective(const OMPSimdDirective &S);
void EmitOMPForDirective(const OMPForDirective &S);
void EmitOMPForSimdDirective(const OMPForSimdDirective &S);
void EmitOMPSectionsDirective(const OMPSectionsDirective &S);
void EmitOMPSectionDirective(const OMPSectionDirective &S);
void EmitOMPSingleDirective(const OMPSingleDirective &S);
void EmitOMPMasterDirective(const OMPMasterDirective &S);
void EmitOMPCriticalDirective(const OMPCriticalDirective &S);
void EmitOMPParallelForDirective(const OMPParallelForDirective &S);
void EmitOMPParallelForSimdDirective(const OMPParallelForSimdDirective &S);
void EmitOMPParallelSectionsDirective(const OMPParallelSectionsDirective &S);
void EmitOMPTaskDirective(const OMPTaskDirective &S);
void EmitOMPTaskyieldDirective(const OMPTaskyieldDirective &S);
void EmitOMPBarrierDirective(const OMPBarrierDirective &S);
void EmitOMPTaskwaitDirective(const OMPTaskwaitDirective &S);
void EmitOMPTaskgroupDirective(const OMPTaskgroupDirective &S);
void EmitOMPFlushDirective(const OMPFlushDirective &S);
void EmitOMPOrderedDirective(const OMPOrderedDirective &S);
void EmitOMPAtomicDirective(const OMPAtomicDirective &S);
void EmitOMPTargetDirective(const OMPTargetDirective &S);
void EmitOMPTargetDataDirective(const OMPTargetDataDirective &S);
void EmitOMPTargetEnterDataDirective(const OMPTargetEnterDataDirective &S);
void EmitOMPTargetExitDataDirective(const OMPTargetExitDataDirective &S);
void EmitOMPTargetUpdateDirective(const OMPTargetUpdateDirective &S);
void EmitOMPTargetParallelDirective(const OMPTargetParallelDirective &S);
void
EmitOMPTargetParallelForDirective(const OMPTargetParallelForDirective &S);
void EmitOMPTeamsDirective(const OMPTeamsDirective &S);
void
EmitOMPCancellationPointDirective(const OMPCancellationPointDirective &S);
void EmitOMPCancelDirective(const OMPCancelDirective &S);
void EmitOMPTaskLoopBasedDirective(const OMPLoopDirective &S);
void EmitOMPTaskLoopDirective(const OMPTaskLoopDirective &S);
void EmitOMPTaskLoopSimdDirective(const OMPTaskLoopSimdDirective &S);
void EmitOMPDistributeDirective(const OMPDistributeDirective &S);
void EmitOMPDistributeParallelForDirective(
    const OMPDistributeParallelForDirective &S);
void EmitOMPDistributeParallelForSimdDirective(
    const OMPDistributeParallelForSimdDirective &S);
void EmitOMPDistributeSimdDirective(const OMPDistributeSimdDirective &S);
void EmitOMPTargetParallelForSimdDirective(
    const OMPTargetParallelForSimdDirective &S);
void EmitOMPTargetSimdDirective(const OMPTargetSimdDirective &S);
void EmitOMPTeamsDistributeDirective(const OMPTeamsDistributeDirective &S);
void
EmitOMPTeamsDistributeSimdDirective(const OMPTeamsDistributeSimdDirective &S);
void EmitOMPTeamsDistributeParallelForSimdDirective(
    const OMPTeamsDistributeParallelForSimdDirective &S);
void EmitOMPTeamsDistributeParallelForDirective(
    const OMPTeamsDistributeParallelForDirective &S);
void EmitOMPTargetTeamsDirective(const OMPTargetTeamsDirective &S);
void EmitOMPTargetTeamsDistributeDirective(
    const OMPTargetTeamsDistributeDirective &S);
void EmitOMPTargetTeamsDistributeParallelForDirective(
    const OMPTargetTeamsDistributeParallelForDirective &S);
void EmitOMPTargetTeamsDistributeParallelForSimdDirective(
    const OMPTargetTeamsDistributeParallelForSimdDirective &S);
void EmitOMPTargetTeamsDistributeSimdDirective(
    const OMPTargetTeamsDistributeSimdDirective &S);

/// Emit device code for the target directive.
static void EmitOMPTargetDeviceFunction(CodeGenModule &CGM,
                                        StringRef ParentName,
                                        const OMPTargetDirective &S);
static void
EmitOMPTargetParallelDeviceFunction(CodeGenModule &CGM, StringRef ParentName,
                                    const OMPTargetParallelDirective &S);
/// Emit device code for the target parallel for directive.
static void EmitOMPTargetParallelForDeviceFunction(
    CodeGenModule &CGM, StringRef ParentName,
    const OMPTargetParallelForDirective &S);
/// Emit device code for the target parallel for simd directive.
static void EmitOMPTargetParallelForSimdDeviceFunction(
    CodeGenModule &CGM, StringRef ParentName,
    const OMPTargetParallelForSimdDirective &S);
/// Emit device code for the target teams directive.
static void
EmitOMPTargetTeamsDeviceFunction(CodeGenModule &CGM, StringRef ParentName,
                                 const OMPTargetTeamsDirective &S);
/// Emit device code for the target teams distribute directive.
static void EmitOMPTargetTeamsDistributeDeviceFunction(
    CodeGenModule &CGM, StringRef ParentName,
    const OMPTargetTeamsDistributeDirective &S);
/// Emit device code for the target teams distribute simd directive.
static void EmitOMPTargetTeamsDistributeSimdDeviceFunction(
    CodeGenModule &CGM, StringRef ParentName,
    const OMPTargetTeamsDistributeSimdDirective &S);
/// Emit device code for the target simd directive.
static void EmitOMPTargetSimdDeviceFunction(CodeGenModule &CGM,
                                            StringRef ParentName,
                                            const OMPTargetSimdDirective &S);
/// Emit device code for the target teams distribute parallel for simd
/// directive.
static void EmitOMPTargetTeamsDistributeParallelForSimdDeviceFunction(
    CodeGenModule &CGM, StringRef ParentName,
    const OMPTargetTeamsDistributeParallelForSimdDirective &S);

static void EmitOMPTargetTeamsDistributeParallelForDeviceFunction(
    CodeGenModule &CGM, StringRef ParentName,
    const OMPTargetTeamsDistributeParallelForDirective &S);
/// Emit inner loop of the worksharing/simd construct.
///
/// \param S Directive, for which the inner loop must be emitted.
/// \param RequiresCleanup true, if directive has some associated private
/// variables.
/// \param LoopCond Bollean condition for loop continuation.
/// \param IncExpr Increment expression for loop control variable.
/// \param BodyGen Generator for the inner body of the inner loop.
/// \param PostIncGen Genrator for post-increment code (required for ordered
/// loop directvies).
void EmitOMPInnerLoop(
    const Stmt &S, bool RequiresCleanup, const Expr *LoopCond,
    const Expr *IncExpr,
    const llvm::function_ref<void(CodeGenFunction &)> BodyGen,
    const llvm::function_ref<void(CodeGenFunction &)> PostIncGen);

JumpDest getOMPCancelDestination(OpenMPDirectiveKind Kind);
/// Emit initial code for loop counters of loop-based directives.
void EmitOMPPrivateLoopCounters(const OMPLoopDirective &S,
                                OMPPrivateScope &LoopScope);

/// Helper for the OpenMP loop directives.
void EmitOMPLoopBody(const OMPLoopDirective &D, JumpDest LoopExit);

/// Emit code for the worksharing loop-based directive.
/// \return true, if this construct has any lastprivate clause, false -
/// otherwise.
bool EmitOMPWorksharingLoop(const OMPLoopDirective &S, Expr *EUB,
                            const CodeGenLoopBoundsTy &CodeGenLoopBounds,
                            const CodeGenDispatchBoundsTy &CGDispatchBounds);

/// Emit code for the distribute loop-based directive.
void EmitOMPDistributeLoop(const OMPLoopDirective &S,
                           const CodeGenLoopTy &CodeGenLoop, Expr *IncExpr);

/// Helpers for the OpenMP loop directives.
void EmitOMPSimdInit(const OMPLoopDirective &D, bool IsMonotonic = false);
void EmitOMPSimdFinal(
    const OMPLoopDirective &D,
    const llvm::function_ref<llvm::Value *(CodeGenFunction &)> CondGen);

/// Emits the lvalue for the expression with possibly captured variable.
LValue EmitOMPSharedLValue(const Expr *E);

3273private:
/// Helpers for blocks.
llvm::Value *EmitBlockLiteral(const CGBlockInfo &Info);

/// struct with the values to be passed to the OpenMP loop-related functions
struct OMPLoopArguments {
  /// loop lower bound
  Address LB = Address::invalid();
  /// loop upper bound
  Address UB = Address::invalid();
  /// loop stride
  Address ST = Address::invalid();
  /// isLastIteration argument for runtime functions
  Address IL = Address::invalid();
  /// Chunk value generated by sema
  llvm::Value *Chunk = nullptr;
  /// EnsureUpperBound
  Expr *EUB = nullptr;
  /// IncrementExpression
  Expr *IncExpr = nullptr;
  /// Loop initialization
  Expr *Init = nullptr;
  /// Loop exit condition
  Expr *Cond = nullptr;
  /// Update of LB after a whole chunk has been executed
  Expr *NextLB = nullptr;
  /// Update of UB after a whole chunk has been executed
  Expr *NextUB = nullptr;
  OMPLoopArguments() = default;
  OMPLoopArguments(Address LB, Address UB, Address ST, Address IL,
                   llvm::Value *Chunk = nullptr, Expr *EUB = nullptr,
                   Expr *IncExpr = nullptr, Expr *Init = nullptr,
                   Expr *Cond = nullptr, Expr *NextLB = nullptr,
                   Expr *NextUB = nullptr)
      : LB(LB), UB(UB), ST(ST), IL(IL), Chunk(Chunk), EUB(EUB),
        IncExpr(IncExpr), Init(Init), Cond(Cond), NextLB(NextLB),
        NextUB(NextUB) {}
};
void EmitOMPOuterLoop(bool DynamicOrOrdered, bool IsMonotonic,
                      const OMPLoopDirective &S, OMPPrivateScope &LoopScope,
                      const OMPLoopArguments &LoopArgs,
                      const CodeGenLoopTy &CodeGenLoop,
                      const CodeGenOrderedTy &CodeGenOrdered);
void EmitOMPForOuterLoop(const OpenMPScheduleTy &ScheduleKind,
                         bool IsMonotonic, const OMPLoopDirective &S,
                         OMPPrivateScope &LoopScope, bool Ordered,
                         const OMPLoopArguments &LoopArgs,
                         const CodeGenDispatchBoundsTy &CGDispatchBounds);
void EmitOMPDistributeOuterLoop(OpenMPDistScheduleClauseKind ScheduleKind,
                                const OMPLoopDirective &S,
                                OMPPrivateScope &LoopScope,
                                const OMPLoopArguments &LoopArgs,
                                const CodeGenLoopTy &CodeGenLoopContent);
/// Emit code for sections directive.
void EmitSections(const OMPExecutableDirective &S);

3329public:

//===--------------------------------------------------------------------===//
//                         LValue Expression Emission
//===--------------------------------------------------------------------===//

/// GetUndefRValue - Get an appropriate 'undef' rvalue for the given type.
RValue GetUndefRValue(QualType Ty);

/// EmitUnsupportedRValue - Emit a dummy r-value using the type of E
/// and issue an ErrorUnsupported style diagnostic (using the
/// provided Name).
RValue EmitUnsupportedRValue(const Expr *E,
                             const char *Name);

/// EmitUnsupportedLValue - Emit a dummy l-value using the type of E and issue
/// an ErrorUnsupported style diagnostic (using the provided Name).
LValue EmitUnsupportedLValue(const Expr *E,
                             const char *Name);

/// EmitLValue - Emit code to compute a designator that specifies the location
/// of the expression.
///
/// This can return one of two things: a simple address or a bitfield
/// reference.  In either case, the LLVM Value* in the LValue structure is
/// guaranteed to be an LLVM pointer type.
///
/// If this returns a bitfield reference, nothing about the pointee type of
/// the LLVM value is known: For example, it may not be a pointer to an
/// integer.
///
/// If this returns a normal address, and if the lvalue's C type is fixed
/// size, this method guarantees that the returned pointer type will point to
/// an LLVM type of the same size of the lvalue's type.  If the lvalue has a
/// variable length type, this is not possible.
///
LValue EmitLValue(const Expr *E);

/// Same as EmitLValue but additionally we generate checking code to
/// guard against undefined behavior.  This is only suitable when we know
/// that the address will be used to access the object.
LValue EmitCheckedLValue(const Expr *E, TypeCheckKind TCK);

RValue convertTempToRValue(Address addr, QualType type,
                           SourceLocation Loc);

void EmitAtomicInit(Expr *E, LValue lvalue);

bool LValueIsSuitableForInlineAtomic(LValue Src);

RValue EmitAtomicLoad(LValue LV, SourceLocation SL,
                      AggValueSlot Slot = AggValueSlot::ignored());

RValue EmitAtomicLoad(LValue lvalue, SourceLocation loc,
                      llvm::AtomicOrdering AO, bool IsVolatile = false,
                      AggValueSlot slot = AggValueSlot::ignored());

void EmitAtomicStore(RValue rvalue, LValue lvalue, bool isInit);

void EmitAtomicStore(RValue rvalue, LValue lvalue, llvm::AtomicOrdering AO,
                     bool IsVolatile, bool isInit);

std::pair<RValue, llvm::Value *> EmitAtomicCompareExchange(
    LValue Obj, RValue Expected, RValue Desired, SourceLocation Loc,
    llvm::AtomicOrdering Success =
        llvm::AtomicOrdering::SequentiallyConsistent,
    llvm::AtomicOrdering Failure =
        llvm::AtomicOrdering::SequentiallyConsistent,
    bool IsWeak = false, AggValueSlot Slot = AggValueSlot::ignored());

void EmitAtomicUpdate(LValue LVal, llvm::AtomicOrdering AO,
                      const llvm::function_ref<RValue(RValue)> &UpdateOp,
                      bool IsVolatile);

/// EmitToMemory - Change a scalar value from its value
/// representation to its in-memory representation.
llvm::Value *EmitToMemory(llvm::Value *Value, QualType Ty);

/// EmitFromMemory - Change a scalar value from its memory
/// representation to its value representation.
llvm::Value *EmitFromMemory(llvm::Value *Value, QualType Ty);

/// Check if the scalar \p Value is within the valid range for the given
/// type \p Ty.
///
/// Returns true if a check is needed (even if the range is unknown).
bool EmitScalarRangeCheck(llvm::Value *Value, QualType Ty,
                          SourceLocation Loc);

/// EmitLoadOfScalar - Load a scalar value from an address, taking
/// care to appropriately convert from the memory representation to
/// the LLVM value representation.
llvm::Value *EmitLoadOfScalar(Address Addr, bool Volatile, QualType Ty,
                              SourceLocation Loc,
                              AlignmentSource Source = AlignmentSource::Type,
                              bool isNontemporal = false) {
  return EmitLoadOfScalar(Addr, Volatile, Ty, Loc, LValueBaseInfo(Source),
                          CGM.getTBAAAccessInfo(Ty), isNontemporal);
}

llvm::Value *EmitLoadOfScalar(Address Addr, bool Volatile, QualType Ty,
                              SourceLocation Loc, LValueBaseInfo BaseInfo,
                              TBAAAccessInfo TBAAInfo,
                              bool isNontemporal = false);

/// EmitLoadOfScalar - Load a scalar value from an address, taking
/// care to appropriately convert from the memory representation to
/// the LLVM value representation.  The l-value must be a simple
/// l-value.
llvm::Value *EmitLoadOfScalar(LValue lvalue, SourceLocation Loc);

/// EmitStoreOfScalar - Store a scalar value to an address, taking
/// care to appropriately convert from the memory representation to
/// the LLVM value representation.
void EmitStoreOfScalar(llvm::Value *Value, Address Addr,
                       bool Volatile, QualType Ty,
                       AlignmentSource Source = AlignmentSource::Type,
                       bool isInit = false, bool isNontemporal = false) {
  EmitStoreOfScalar(Value, Addr, Volatile, Ty, LValueBaseInfo(Source),
                    CGM.getTBAAAccessInfo(Ty), isInit, isNontemporal);
}

void EmitStoreOfScalar(llvm::Value *Value, Address Addr,
                       bool Volatile, QualType Ty,
                       LValueBaseInfo BaseInfo, TBAAAccessInfo TBAAInfo,
                       bool isInit = false, bool isNontemporal = false);

/// EmitStoreOfScalar - Store a scalar value to an address, taking
/// care to appropriately convert from the memory representation to
/// the LLVM value representation.  The l-value must be a simple
/// l-value.  The isInit flag indicates whether this is an initialization.
/// If so, atomic qualifiers are ignored and the store is always non-atomic.
void EmitStoreOfScalar(llvm::Value *value, LValue lvalue, bool isInit=false);

/// EmitLoadOfLValue - Given an expression that represents a value lvalue,
/// this method emits the address of the lvalue, then loads the result as an
/// rvalue, returning the rvalue.
RValue EmitLoadOfLValue(LValue V, SourceLocation Loc);
RValue EmitLoadOfExtVectorElementLValue(LValue V);
RValue EmitLoadOfBitfieldLValue(LValue LV, SourceLocation Loc);
RValue EmitLoadOfGlobalRegLValue(LValue LV);

/// EmitStoreThroughLValue - Store the specified rvalue into the specified
/// lvalue, where both are guaranteed to the have the same type, and that type
/// is 'Ty'.
void EmitStoreThroughLValue(RValue Src, LValue Dst, bool isInit = false);
void EmitStoreThroughExtVectorComponentLValue(RValue Src, LValue Dst);
void EmitStoreThroughGlobalRegLValue(RValue Src, LValue Dst);

/// EmitStoreThroughBitfieldLValue - Store Src into Dst with same constraints
/// as EmitStoreThroughLValue.
///
/// \param Result [out] - If non-null, this will be set to a Value* for the
/// bit-field contents after the store, appropriate for use as the result of
/// an assignment to the bit-field.
void EmitStoreThroughBitfieldLValue(RValue Src, LValue Dst,
                                    llvm::Value **Result=nullptr);

/// Emit an l-value for an assignment (simple or compound) of complex type.
LValue EmitComplexAssignmentLValue(const BinaryOperator *E);
LValue EmitComplexCompoundAssignmentLValue(const CompoundAssignOperator *E);
LValue EmitScalarCompoundAssignWithComplex(const CompoundAssignOperator *E,
                                           llvm::Value *&Result);

// Note: only available for agg return types
LValue EmitBinaryOperatorLValue(const BinaryOperator *E);
LValue EmitCompoundAssignmentLValue(const CompoundAssignOperator *E);
// Note: only available for agg return types
LValue EmitCallExprLValue(const CallExpr *E);
// Note: only available for agg return types
LValue EmitVAArgExprLValue(const VAArgExpr *E);
LValue EmitDeclRefLValue(const DeclRefExpr *E);
LValue EmitStringLiteralLValue(const StringLiteral *E);
LValue EmitObjCEncodeExprLValue(const ObjCEncodeExpr *E);
LValue EmitPredefinedLValue(const PredefinedExpr *E);
LValue EmitUnaryOpLValue(const UnaryOperator *E);
LValue EmitArraySubscriptExpr(const ArraySubscriptExpr *E,
                              bool Accessed = false);
LValue EmitOMPArraySectionExpr(const OMPArraySectionExpr *E,
                               bool IsLowerBound = true);
LValue EmitExtVectorElementExpr(const ExtVectorElementExpr *E);
LValue EmitMemberExpr(const MemberExpr *E);
LValue EmitObjCIsaExpr(const ObjCIsaExpr *E);
LValue EmitCompoundLiteralLValue(const CompoundLiteralExpr *E);
LValue EmitInitListLValue(const InitListExpr *E);
LValue EmitConditionalOperatorLValue(const AbstractConditionalOperator *E);
LValue EmitCastLValue(const CastExpr *E);
LValue EmitMaterializeTemporaryExpr(const MaterializeTemporaryExpr *E);
LValue EmitOpaqueValueLValue(const OpaqueValueExpr *e);

Address EmitExtVectorElementLValue(LValue V);

RValue EmitRValueForField(LValue LV, const FieldDecl *FD, SourceLocation Loc);

Address EmitArrayToPointerDecay(const Expr *Array,
                                LValueBaseInfo *BaseInfo = nullptr,
                                TBAAAccessInfo *TBAAInfo = nullptr);

class ConstantEmission {
  llvm::PointerIntPair<llvm::Constant*, 1, bool> ValueAndIsReference;
  ConstantEmission(llvm::Constant *C, bool isReference)
    : ValueAndIsReference(C, isReference) {}
public:
  ConstantEmission() {}
  static ConstantEmission forReference(llvm::Constant *C) {
    return ConstantEmission(C, true);
  }
  static ConstantEmission forValue(llvm::Constant *C) {
    return ConstantEmission(C, false);
  }

  explicit operator bool() const {
    return ValueAndIsReference.getOpaqueValue() != nullptr;
  }

  bool isReference() const { return ValueAndIsReference.getInt(); }
  LValue getReferenceLValue(CodeGenFunction &CGF, Expr *refExpr) const {
    assert(isReference())((isReference()) ? static_cast<void> (0) : __assert_fail
 ("isReference()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 3546, __PRETTY_FUNCTION__));
    return CGF.MakeNaturalAlignAddrLValue(ValueAndIsReference.getPointer(),
                                          refExpr->getType());
  }

  llvm::Constant *getValue() const {
    assert(!isReference())((!isReference()) ? static_cast<void> (0) : __assert_fail
 ("!isReference()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 3552, __PRETTY_FUNCTION__));
    return ValueAndIsReference.getPointer();
  }
};

ConstantEmission tryEmitAsConstant(DeclRefExpr *refExpr);
ConstantEmission tryEmitAsConstant(const MemberExpr *ME);
llvm::Value *emitScalarConstant(const ConstantEmission &Constant, Expr *E);

RValue EmitPseudoObjectRValue(const PseudoObjectExpr *e,
                              AggValueSlot slot = AggValueSlot::ignored());
LValue EmitPseudoObjectLValue(const PseudoObjectExpr *e);

llvm::Value *EmitIvarOffset(const ObjCInterfaceDecl *Interface,
                            const ObjCIvarDecl *Ivar);
LValue EmitLValueForField(LValue Base, const FieldDecl* Field);
LValue EmitLValueForLambdaField(const FieldDecl *Field);

/// EmitLValueForFieldInitialization - Like EmitLValueForField, except that
/// if the Field is a reference, this will return the address of the reference
/// and not the address of the value stored in the reference.
LValue EmitLValueForFieldInitialization(LValue Base,
                                        const FieldDecl* Field);

LValue EmitLValueForIvar(QualType ObjectTy,
                         llvm::Value* Base, const ObjCIvarDecl *Ivar,
                         unsigned CVRQualifiers);

LValue EmitCXXConstructLValue(const CXXConstructExpr *E);
LValue EmitCXXBindTemporaryLValue(const CXXBindTemporaryExpr *E);
LValue EmitCXXTypeidLValue(const CXXTypeidExpr *E);
LValue EmitCXXUuidofLValue(const CXXUuidofExpr *E);

LValue EmitObjCMessageExprLValue(const ObjCMessageExpr *E);
LValue EmitObjCIvarRefLValue(const ObjCIvarRefExpr *E);
LValue EmitStmtExprLValue(const StmtExpr *E);
LValue EmitPointerToDataMemberBinaryExpr(const BinaryOperator *E);
LValue EmitObjCSelectorLValue(const ObjCSelectorExpr *E);
void   EmitDeclRefExprDbgValue(const DeclRefExpr *E, const APValue &Init);

//===--------------------------------------------------------------------===//
//                         Scalar Expression Emission
//===--------------------------------------------------------------------===//

/// EmitCall - Generate a call of the given function, expecting the given
/// result type, and using the given argument list which specifies both the
/// LLVM arguments and the types they were derived from.
RValue EmitCall(const CGFunctionInfo &CallInfo, const CGCallee &Callee,
                ReturnValueSlot ReturnValue, const CallArgList &Args,
                llvm::CallBase **callOrInvoke, SourceLocation Loc);
RValue EmitCall(const CGFunctionInfo &CallInfo, const CGCallee &Callee,
                ReturnValueSlot ReturnValue, const CallArgList &Args,
                llvm::CallBase **callOrInvoke = nullptr) {
  return EmitCall(CallInfo, Callee, ReturnValue, Args, callOrInvoke,
                  SourceLocation());
}
RValue EmitCall(QualType FnType, const CGCallee &Callee, const CallExpr *E,
                ReturnValueSlot ReturnValue, llvm::Value *Chain = nullptr);
RValue EmitCallExpr(const CallExpr *E,
                    ReturnValueSlot ReturnValue = ReturnValueSlot());
RValue EmitSimpleCallExpr(const CallExpr *E, ReturnValueSlot ReturnValue);
CGCallee EmitCallee(const Expr *E);

void checkTargetFeatures(const CallExpr *E, const FunctionDecl *TargetDecl);
void checkTargetFeatures(SourceLocation Loc, const FunctionDecl *TargetDecl);

llvm::CallInst *EmitRuntimeCall(llvm::FunctionCallee callee,
                                const Twine &name = "");
llvm::CallInst *EmitRuntimeCall(llvm::FunctionCallee callee,
                                ArrayRef<llvm::Value *> args,
                                const Twine &name = "");
llvm::CallInst *EmitNounwindRuntimeCall(llvm::FunctionCallee callee,
                                        const Twine &name = "");
llvm::CallInst *EmitNounwindRuntimeCall(llvm::FunctionCallee callee,
                                        ArrayRef<llvm::Value *> args,
                                        const Twine &name = "");

SmallVector<llvm::OperandBundleDef, 1>
getBundlesForFunclet(llvm::Value *Callee);

llvm::CallBase *EmitCallOrInvoke(llvm::FunctionCallee Callee,
                                 ArrayRef<llvm::Value *> Args,
                                 const Twine &Name = "");
llvm::CallBase *EmitRuntimeCallOrInvoke(llvm::FunctionCallee callee,
                                        ArrayRef<llvm::Value *> args,
                                        const Twine &name = "");
llvm::CallBase *EmitRuntimeCallOrInvoke(llvm::FunctionCallee callee,
                                        const Twine &name = "");
void EmitNoreturnRuntimeCallOrInvoke(llvm::FunctionCallee callee,
                                     ArrayRef<llvm::Value *> args);

CGCallee BuildAppleKextVirtualCall(const CXXMethodDecl *MD,
                                   NestedNameSpecifier *Qual,
                                   llvm::Type *Ty);

CGCallee BuildAppleKextVirtualDestructorCall(const CXXDestructorDecl *DD,
                                             CXXDtorType Type,
                                             const CXXRecordDecl *RD);

// Return the copy constructor name with the prefix "__copy_constructor_"
// removed.
static std::string getNonTrivialCopyConstructorStr(QualType QT,
                                                   CharUnits Alignment,
                                                   bool IsVolatile,
                                                   ASTContext &Ctx);

// Return the destructor name with the prefix "__destructor_" removed.
static std::string getNonTrivialDestructorStr(QualType QT,
                                              CharUnits Alignment,
                                              bool IsVolatile,
                                              ASTContext &Ctx);

// These functions emit calls to the special functions of non-trivial C
// structs.
void defaultInitNonTrivialCStructVar(LValue Dst);
void callCStructDefaultConstructor(LValue Dst);
void callCStructDestructor(LValue Dst);
void callCStructCopyConstructor(LValue Dst, LValue Src);
void callCStructMoveConstructor(LValue Dst, LValue Src);
void callCStructCopyAssignmentOperator(LValue Dst, LValue Src);
void callCStructMoveAssignmentOperator(LValue Dst, LValue Src);

RValue
EmitCXXMemberOrOperatorCall(const CXXMethodDecl *Method,
                            const CGCallee &Callee,
                            ReturnValueSlot ReturnValue, llvm::Value *This,
                            llvm::Value *ImplicitParam,
                            QualType ImplicitParamTy, const CallExpr *E,
                            CallArgList *RtlArgs);
RValue EmitCXXDestructorCall(GlobalDecl Dtor, const CGCallee &Callee,
                             llvm::Value *This, QualType ThisTy,
                             llvm::Value *ImplicitParam,
                             QualType ImplicitParamTy, const CallExpr *E);
RValue EmitCXXMemberCallExpr(const CXXMemberCallExpr *E,
                             ReturnValueSlot ReturnValue);
RValue EmitCXXMemberOrOperatorMemberCallExpr(const CallExpr *CE,
                                             const CXXMethodDecl *MD,
                                             ReturnValueSlot ReturnValue,
                                             bool HasQualifier,
                                             NestedNameSpecifier *Qualifier,
                                             bool IsArrow, const Expr *Base);
// Compute the object pointer.
Address EmitCXXMemberDataPointerAddress(const Expr *E, Address base,
                                        llvm::Value *memberPtr,
                                        const MemberPointerType *memberPtrType,
                                        LValueBaseInfo *BaseInfo = nullptr,
                                        TBAAAccessInfo *TBAAInfo = nullptr);
RValue EmitCXXMemberPointerCallExpr(const CXXMemberCallExpr *E,
                                    ReturnValueSlot ReturnValue);

RValue EmitCXXOperatorMemberCallExpr(const CXXOperatorCallExpr *E,
                                     const CXXMethodDecl *MD,
                                     ReturnValueSlot ReturnValue);
RValue EmitCXXPseudoDestructorExpr(const CXXPseudoDestructorExpr *E);

RValue EmitCUDAKernelCallExpr(const CUDAKernelCallExpr *E,
                              ReturnValueSlot ReturnValue);

RValue EmitNVPTXDevicePrintfCallExpr(const CallExpr *E,
                                     ReturnValueSlot ReturnValue);

RValue EmitBuiltinExpr(const GlobalDecl GD, unsigned BuiltinID,
                       const CallExpr *E, ReturnValueSlot ReturnValue);

RValue emitRotate(const CallExpr *E, bool IsRotateRight);

/// Emit IR for __builtin_os_log_format.
RValue emitBuiltinOSLogFormat(const CallExpr &E);

llvm::Function *generateBuiltinOSLogHelperFunction(
    const analyze_os_log::OSLogBufferLayout &Layout,
    CharUnits BufferAlignment);

RValue EmitBlockCallExpr(const CallExpr *E, ReturnValueSlot ReturnValue);

/// EmitTargetBuiltinExpr - Emit the given builtin call. Returns 0 if the call
/// is unhandled by the current target.
llvm::Value *EmitTargetBuiltinExpr(unsigned BuiltinID, const CallExpr *E);

llvm::Value *EmitAArch64CompareBuiltinExpr(llvm::Value *Op, llvm::Type *Ty,
                                           const llvm::CmpInst::Predicate Fp,
                                           const llvm::CmpInst::Predicate Ip,
                                           const llvm::Twine &Name = "");
llvm::Value *EmitARMBuiltinExpr(unsigned BuiltinID, const CallExpr *E,
                                llvm::Triple::ArchType Arch);

llvm::Value *EmitCommonNeonBuiltinExpr(unsigned BuiltinID,
                                       unsigned LLVMIntrinsic,
                                       unsigned AltLLVMIntrinsic,
                                       const char *NameHint,
                                       unsigned Modifier,
                                       const CallExpr *E,
                                       SmallVectorImpl<llvm::Value *> &Ops,
                                       Address PtrOp0, Address PtrOp1,
                                       llvm::Triple::ArchType Arch);

llvm::Function *LookupNeonLLVMIntrinsic(unsigned IntrinsicID,
                                        unsigned Modifier, llvm::Type *ArgTy,
                                        const CallExpr *E);
llvm::Value *EmitNeonCall(llvm::Function *F,
                          SmallVectorImpl<llvm::Value*> &O,
                          const char *name,
                          unsigned shift = 0, bool rightshift = false);
llvm::Value *EmitNeonSplat(llvm::Value *V, llvm::Constant *Idx);
llvm::Value *EmitNeonShiftVector(llvm::Value *V, llvm::Type *Ty,
                                 bool negateForRightShift);
llvm::Value *EmitNeonRShiftImm(llvm::Value *Vec, llvm::Value *Amt,
                               llvm::Type *Ty, bool usgn, const char *name);
llvm::Value *vectorWrapScalar16(llvm::Value *Op);
llvm::Value *EmitAArch64BuiltinExpr(unsigned BuiltinID, const CallExpr *E,
                                    llvm::Triple::ArchType Arch);

llvm::Value *BuildVector(ArrayRef<llvm::Value*> Ops);
llvm::Value *EmitX86BuiltinExpr(unsigned BuiltinID, const CallExpr *E);
llvm::Value *EmitPPCBuiltinExpr(unsigned BuiltinID, const CallExpr *E);
llvm::Value *EmitAMDGPUBuiltinExpr(unsigned BuiltinID, const CallExpr *E);
llvm::Value *EmitSystemZBuiltinExpr(unsigned BuiltinID, const CallExpr *E);
llvm::Value *EmitNVPTXBuiltinExpr(unsigned BuiltinID, const CallExpr *E);
llvm::Value *EmitWebAssemblyBuiltinExpr(unsigned BuiltinID,
                                        const CallExpr *E);
llvm::Value *EmitHexagonBuiltinExpr(unsigned BuiltinID, const CallExpr *E);

3774private:
enum class MSVCIntrin;

3777public:
llvm::Value *EmitMSVCBuiltinExpr(MSVCIntrin BuiltinID, const CallExpr *E);

llvm::Value *EmitBuiltinAvailable(ArrayRef<llvm::Value *> Args);

llvm::Value *EmitObjCProtocolExpr(const ObjCProtocolExpr *E);
llvm::Value *EmitObjCStringLiteral(const ObjCStringLiteral *E);
llvm::Value *EmitObjCBoxedExpr(const ObjCBoxedExpr *E);
llvm::Value *EmitObjCArrayLiteral(const ObjCArrayLiteral *E);
llvm::Value *EmitObjCDictionaryLiteral(const ObjCDictionaryLiteral *E);
llvm::Value *EmitObjCCollectionLiteral(const Expr *E,
                              const ObjCMethodDecl *MethodWithObjects);
llvm::Value *EmitObjCSelectorExpr(const ObjCSelectorExpr *E);
RValue EmitObjCMessageExpr(const ObjCMessageExpr *E,
                           ReturnValueSlot Return = ReturnValueSlot());

/// Retrieves the default cleanup kind for an ARC cleanup.
/// Except under -fobjc-arc-eh, ARC cleanups are normal-only.
CleanupKind getARCCleanupKind() {
  return CGM.getCodeGenOpts().ObjCAutoRefCountExceptions
           ? NormalAndEHCleanup : NormalCleanup;
}

// ARC primitives.
void EmitARCInitWeak(Address addr, llvm::Value *value);
void EmitARCDestroyWeak(Address addr);
llvm::Value *EmitARCLoadWeak(Address addr);
llvm::Value *EmitARCLoadWeakRetained(Address addr);
llvm::Value *EmitARCStoreWeak(Address addr, llvm::Value *value, bool ignored);
void emitARCCopyAssignWeak(QualType Ty, Address DstAddr, Address SrcAddr);
void emitARCMoveAssignWeak(QualType Ty, Address DstAddr, Address SrcAddr);
void EmitARCCopyWeak(Address dst, Address src);
void EmitARCMoveWeak(Address dst, Address src);
llvm::Value *EmitARCRetainAutorelease(QualType type, llvm::Value *value);
llvm::Value *EmitARCRetainAutoreleaseNonBlock(llvm::Value *value);
llvm::Value *EmitARCStoreStrong(LValue lvalue, llvm::Value *value,
                                bool resultIgnored);
llvm::Value *EmitARCStoreStrongCall(Address addr, llvm::Value *value,
                                    bool resultIgnored);
llvm::Value *EmitARCRetain(QualType type, llvm::Value *value);
llvm::Value *EmitARCRetainNonBlock(llvm::Value *value);
llvm::Value *EmitARCRetainBlock(llvm::Value *value, bool mandatory);
void EmitARCDestroyStrong(Address addr, ARCPreciseLifetime_t precise);
void EmitARCRelease(llvm::Value *value, ARCPreciseLifetime_t precise);
llvm::Value *EmitARCAutorelease(llvm::Value *value);
llvm::Value *EmitARCAutoreleaseReturnValue(llvm::Value *value);
llvm::Value *EmitARCRetainAutoreleaseReturnValue(llvm::Value *value);
llvm::Value *EmitARCRetainAutoreleasedReturnValue(llvm::Value *value);
llvm::Value *EmitARCUnsafeClaimAutoreleasedReturnValue(llvm::Value *value);

llvm::Value *EmitObjCAutorelease(llvm::Value *value, llvm::Type *returnType);
llvm::Value *EmitObjCRetainNonBlock(llvm::Value *value,
                                    llvm::Type *returnType);
void EmitObjCRelease(llvm::Value *value, ARCPreciseLifetime_t precise);

std::pair<LValue,llvm::Value*>
EmitARCStoreAutoreleasing(const BinaryOperator *e);
std::pair<LValue,llvm::Value*>
EmitARCStoreStrong(const BinaryOperator *e, bool ignored);
std::pair<LValue,llvm::Value*>
EmitARCStoreUnsafeUnretained(const BinaryOperator *e, bool ignored);

llvm::Value *EmitObjCAlloc(llvm::Value *value,
                           llvm::Type *returnType);
llvm::Value *EmitObjCAllocWithZone(llvm::Value *value,
                                   llvm::Type *returnType);
llvm::Value *EmitObjCAllocInit(llvm::Value *value, llvm::Type *resultType);

llvm::Value *EmitObjCThrowOperand(const Expr *expr);
llvm::Value *EmitObjCConsumeObject(QualType T, llvm::Value *Ptr);
llvm::Value *EmitObjCExtendObjectLifetime(QualType T, llvm::Value *Ptr);

llvm::Value *EmitARCExtendBlockObject(const Expr *expr);
llvm::Value *EmitARCReclaimReturnedObject(const Expr *e,
                                          bool allowUnsafeClaim);
llvm::Value *EmitARCRetainScalarExpr(const Expr *expr);
llvm::Value *EmitARCRetainAutoreleaseScalarExpr(const Expr *expr);
llvm::Value *EmitARCUnsafeUnretainedScalarExpr(const Expr *expr);

void EmitARCIntrinsicUse(ArrayRef<llvm::Value*> values);

static Destroyer destroyARCStrongImprecise;
static Destroyer destroyARCStrongPrecise;
static Destroyer destroyARCWeak;
static Destroyer emitARCIntrinsicUse;
static Destroyer destroyNonTrivialCStruct;

void EmitObjCAutoreleasePoolPop(llvm::Value *Ptr);
llvm::Value *EmitObjCAutoreleasePoolPush();
llvm::Value *EmitObjCMRRAutoreleasePoolPush();
void EmitObjCAutoreleasePoolCleanup(llvm::Value *Ptr);
void EmitObjCMRRAutoreleasePoolPop(llvm::Value *Ptr);

/// Emits a reference binding to the passed in expression.
RValue EmitReferenceBindingToExpr(const Expr *E);

//===--------------------------------------------------------------------===//
//                           Expression Emission
//===--------------------------------------------------------------------===//

// Expressions are broken into three classes: scalar, complex, aggregate.

/// EmitScalarExpr - Emit the computation of the specified expression of LLVM
/// scalar type, returning the result.
llvm::Value *EmitScalarExpr(const Expr *E , bool IgnoreResultAssign = false);

/// Emit a conversion from the specified type to the specified destination
/// type, both of which are LLVM scalar types.
llvm::Value *EmitScalarConversion(llvm::Value *Src, QualType SrcTy,
                                  QualType DstTy, SourceLocation Loc);

/// Emit a conversion from the specified complex type to the specified
/// destination type, where the destination type is an LLVM scalar type.
llvm::Value *EmitComplexToScalarConversion(ComplexPairTy Src, QualType SrcTy,
                                           QualType DstTy,
                                           SourceLocation Loc);

/// EmitAggExpr - Emit the computation of the specified expression
/// of aggregate type.  The result is computed into the given slot,
/// which may be null to indicate that the value is not needed.
void EmitAggExpr(const Expr *E, AggValueSlot AS);

/// EmitAggExprToLValue - Emit the computation of the specified expression of
/// aggregate type into a temporary LValue.
LValue EmitAggExprToLValue(const Expr *E);

/// EmitExtendGCLifetime - Given a pointer to an Objective-C object,
/// make sure it survives garbage collection until this point.
void EmitExtendGCLifetime(llvm::Value *object);

/// EmitComplexExpr - Emit the computation of the specified expression of
/// complex type, returning the result.
ComplexPairTy EmitComplexExpr(const Expr *E,
                              bool IgnoreReal = false,
                              bool IgnoreImag = false);

/// EmitComplexExprIntoLValue - Emit the given expression of complex
/// type and place its result into the specified l-value.
void EmitComplexExprIntoLValue(const Expr *E, LValue dest, bool isInit);

/// EmitStoreOfComplex - Store a complex number into the specified l-value.
void EmitStoreOfComplex(ComplexPairTy V, LValue dest, bool isInit);

/// EmitLoadOfComplex - Load a complex number from the specified l-value.
ComplexPairTy EmitLoadOfComplex(LValue src, SourceLocation loc);

Address emitAddrOfRealComponent(Address complex, QualType complexType);
Address emitAddrOfImagComponent(Address complex, QualType complexType);

/// AddInitializerToStaticVarDecl - Add the initializer for 'D' to the
/// global variable that has already been created for it.  If the initializer
/// has a different type than GV does, this may free GV and return a different
/// one.  Otherwise it just returns GV.
llvm::GlobalVariable *
AddInitializerToStaticVarDecl(const VarDecl &D,
                              llvm::GlobalVariable *GV);

// Emit an @llvm.invariant.start call for the given memory region.
void EmitInvariantStart(llvm::Constant *Addr, CharUnits Size);

/// EmitCXXGlobalVarDeclInit - Create the initializer for a C++
/// variable with global storage.
void EmitCXXGlobalVarDeclInit(const VarDecl &D, llvm::Constant *DeclPtr,
                              bool PerformInit);

llvm::Function *createAtExitStub(const VarDecl &VD, llvm::FunctionCallee Dtor,
                                 llvm::Constant *Addr);

/// Call atexit() with a function that passes the given argument to
/// the given function.
void registerGlobalDtorWithAtExit(const VarDecl &D, llvm::FunctionCallee fn,
                                  llvm::Constant *addr);

/// Call atexit() with function dtorStub.
void registerGlobalDtorWithAtExit(llvm::Constant *dtorStub);

/// Emit code in this function to perform a guarded variable
/// initialization.  Guarded initializations are used when it's not
/// possible to prove that an initialization will be done exactly
/// once, e.g. with a static local variable or a static data member
/// of a class template.
void EmitCXXGuardedInit(const VarDecl &D, llvm::GlobalVariable *DeclPtr,
                        bool PerformInit);

enum class GuardKind { VariableGuard, TlsGuard };

/// Emit a branch to select whether or not to perform guarded initialization.
void EmitCXXGuardedInitBranch(llvm::Value *NeedsInit,
                              llvm::BasicBlock *InitBlock,
                              llvm::BasicBlock *NoInitBlock,
                              GuardKind Kind, const VarDecl *D);

/// GenerateCXXGlobalInitFunc - Generates code for initializing global
/// variables.
void
GenerateCXXGlobalInitFunc(llvm::Function *Fn,
                          ArrayRef<llvm::Function *> CXXThreadLocals,
                          ConstantAddress Guard = ConstantAddress::invalid());

/// GenerateCXXGlobalDtorsFunc - Generates code for destroying global
/// variables.
void GenerateCXXGlobalDtorsFunc(
    llvm::Function *Fn,
    const std::vector<std::tuple<llvm::FunctionType *, llvm::WeakTrackingVH,
                                 llvm::Constant *>> &DtorsAndObjects);

void GenerateCXXGlobalVarDeclInitFunc(llvm::Function *Fn,
                                      const VarDecl *D,
                                      llvm::GlobalVariable *Addr,
                                      bool PerformInit);

void EmitCXXConstructExpr(const CXXConstructExpr *E, AggValueSlot Dest);

void EmitSynthesizedCXXCopyCtor(Address Dest, Address Src, const Expr *Exp);

void enterFullExpression(const FullExpr *E) {
  if (const auto *EWC = dyn_cast<ExprWithCleanups>(E))
    if (EWC->getNumObjects() == 0)
      return;
  enterNonTrivialFullExpression(E);
}
void enterNonTrivialFullExpression(const FullExpr *E);

void EmitCXXThrowExpr(const CXXThrowExpr *E, bool KeepInsertionPoint = true);

RValue EmitAtomicExpr(AtomicExpr *E);

//===--------------------------------------------------------------------===//
//                         Annotations Emission
//===--------------------------------------------------------------------===//

/// Emit an annotation call (intrinsic).
llvm::Value *EmitAnnotationCall(llvm::Function *AnnotationFn,
                                llvm::Value *AnnotatedVal,
                                StringRef AnnotationStr,
                                SourceLocation Location);

/// Emit local annotations for the local variable V, declared by D.
void EmitVarAnnotations(const VarDecl *D, llvm::Value *V);

/// Emit field annotations for the given field & value. Returns the
/// annotation result.
Address EmitFieldAnnotations(const FieldDecl *D, Address V);

//===--------------------------------------------------------------------===//
//                             Internal Helpers
//===--------------------------------------------------------------------===//

/// ContainsLabel - Return true if the statement contains a label in it.  If
/// this statement is not executed normally, it not containing a label means
/// that we can just remove the code.
static bool ContainsLabel(const Stmt *S, bool IgnoreCaseStmts = false);

/// containsBreak - Return true if the statement contains a break out of it.
/// If the statement (recursively) contains a switch or loop with a break
/// inside of it, this is fine.
static bool containsBreak(const Stmt *S);

/// Determine if the given statement might introduce a declaration into the
/// current scope, by being a (possibly-labelled) DeclStmt.
static bool mightAddDeclToScope(const Stmt *S);

/// ConstantFoldsToSimpleInteger - If the specified expression does not fold
/// to a constant, or if it does but contains a label, return false.  If it
/// constant folds return true and set the boolean result in Result.
bool ConstantFoldsToSimpleInteger(const Expr *Cond, bool &Result,
                                  bool AllowLabels = false);

/// ConstantFoldsToSimpleInteger - If the specified expression does not fold
/// to a constant, or if it does but contains a label, return false.  If it
/// constant folds return true and set the folded value.
bool ConstantFoldsToSimpleInteger(const Expr *Cond, llvm::APSInt &Result,
                                  bool AllowLabels = false);

/// EmitBranchOnBoolExpr - Emit a branch on a boolean condition (e.g. for an
/// if statement) to the specified blocks.  Based on the condition, this might
/// try to simplify the codegen of the conditional based on the branch.
/// TrueCount should be the number of times we expect the condition to
/// evaluate to true based on PGO data.
void EmitBranchOnBoolExpr(const Expr *Cond, llvm::BasicBlock *TrueBlock,
                          llvm::BasicBlock *FalseBlock, uint64_t TrueCount);

/// Given an assignment `*LHS = RHS`, emit a test that checks if \p RHS is
/// nonnull, if \p LHS is marked _Nonnull.
void EmitNullabilityCheck(LValue LHS, llvm::Value *RHS, SourceLocation Loc);

/// An enumeration which makes it easier to specify whether or not an
/// operation is a subtraction.
enum { NotSubtraction = false, IsSubtraction = true };

/// Same as IRBuilder::CreateInBoundsGEP, but additionally emits a check to
/// detect undefined behavior when the pointer overflow sanitizer is enabled.
/// \p SignedIndices indicates whether any of the GEP indices are signed.
/// \p IsSubtraction indicates whether the expression used to form the GEP
/// is a subtraction.
llvm::Value *EmitCheckedInBoundsGEP(llvm::Value *Ptr,
                                    ArrayRef<llvm::Value *> IdxList,
                                    bool SignedIndices,
                                    bool IsSubtraction,
                                    SourceLocation Loc,
                                    const Twine &Name = "");

/// Specifies which type of sanitizer check to apply when handling a
/// particular builtin.
enum BuiltinCheckKind {
  BCK_CTZPassedZero,
  BCK_CLZPassedZero,
};

/// Emits an argument for a call to a builtin. If the builtin sanitizer is
/// enabled, a runtime check specified by \p Kind is also emitted.
llvm::Value *EmitCheckedArgForBuiltin(const Expr *E, BuiltinCheckKind Kind);

/// Emit a description of a type in a format suitable for passing to
/// a runtime sanitizer handler.
llvm::Constant *EmitCheckTypeDescriptor(QualType T);

/// Convert a value into a format suitable for passing to a runtime
/// sanitizer handler.
llvm::Value *EmitCheckValue(llvm::Value *V);

/// Emit a description of a source location in a format suitable for
/// passing to a runtime sanitizer handler.
llvm::Constant *EmitCheckSourceLocation(SourceLocation Loc);

/// Create a basic block that will either trap or call a handler function in
/// the UBSan runtime with the provided arguments, and create a conditional
/// branch to it.
void EmitCheck(ArrayRef<std::pair<llvm::Value *, SanitizerMask>> Checked,
               SanitizerHandler Check, ArrayRef<llvm::Constant *> StaticArgs,
               ArrayRef<llvm::Value *> DynamicArgs);

/// Emit a slow path cross-DSO CFI check which calls __cfi_slowpath
/// if Cond if false.
void EmitCfiSlowPathCheck(SanitizerMask Kind, llvm::Value *Cond,
                          llvm::ConstantInt *TypeId, llvm::Value *Ptr,
                          ArrayRef<llvm::Constant *> StaticArgs);

/// Emit a reached-unreachable diagnostic if \p Loc is valid and runtime
/// checking is enabled. Otherwise, just emit an unreachable instruction.
void EmitUnreachable(SourceLocation Loc);

/// Create a basic block that will call the trap intrinsic, and emit a
/// conditional branch to it, for the -ftrapv checks.
void EmitTrapCheck(llvm::Value *Checked);

/// Emit a call to trap or debugtrap and attach function attribute
/// "trap-func-name" if specified.
llvm::CallInst *EmitTrapCall(llvm::Intrinsic::ID IntrID);

/// Emit a stub for the cross-DSO CFI check function.
void EmitCfiCheckStub();

/// Emit a cross-DSO CFI failure handling function.
void EmitCfiCheckFail();

/// Create a check for a function parameter that may potentially be
/// declared as non-null.
void EmitNonNullArgCheck(RValue RV, QualType ArgType, SourceLocation ArgLoc,
                         AbstractCallee AC, unsigned ParmNum);

/// EmitCallArg - Emit a single call argument.
void EmitCallArg(CallArgList &args, const Expr *E, QualType ArgType);

/// EmitDelegateCallArg - We are performing a delegate call; that
/// is, the current function is delegating to another one.  Produce
/// a r-value suitable for passing the given parameter.
void EmitDelegateCallArg(CallArgList &args, const VarDecl *param,
                         SourceLocation loc);

/// SetFPAccuracy - Set the minimum required accuracy of the given floating
/// point operation, expressed as the maximum relative error in ulp.
void SetFPAccuracy(llvm::Value *Val, float Accuracy);

4151private:
llvm::MDNode *getRangeForLoadFromType(QualType Ty);
void EmitReturnOfRValue(RValue RV, QualType Ty);

void deferPlaceholderReplacement(llvm::Instruction *Old, llvm::Value *New);

llvm::SmallVector<std::pair<llvm::Instruction *, llvm::Value *>, 4>
DeferredReplacements;

/// Set the address of a local variable.
void setAddrOfLocalVar(const VarDecl *VD, Address Addr) {
  assert(!LocalDeclMap.count(VD) && "Decl already exists in LocalDeclMap!")((!LocalDeclMap.count(VD) && "Decl already exists in LocalDeclMap!"
) ? static_cast<void> (0) : __assert_fail ("!LocalDeclMap.count(VD) && \"Decl already exists in LocalDeclMap!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 4162, __PRETTY_FUNCTION__));
  LocalDeclMap.insert({VD, Addr});
}

/// ExpandTypeFromArgs - Reconstruct a structure of type \arg Ty
/// from function arguments into \arg Dst. See ABIArgInfo::Expand.
///
/// \param AI - The first function argument of the expansion.
void ExpandTypeFromArgs(QualType Ty, LValue Dst,
                        SmallVectorImpl<llvm::Value *>::iterator &AI);

/// ExpandTypeToArgs - Expand an CallArg \arg Arg, with the LLVM type for \arg
/// Ty, into individual arguments on the provided vector \arg IRCallArgs,
/// starting at index \arg IRCallArgPos. See ABIArgInfo::Expand.
void ExpandTypeToArgs(QualType Ty, CallArg Arg, llvm::FunctionType *IRFuncTy,
                      SmallVectorImpl<llvm::Value *> &IRCallArgs,
                      unsigned &IRCallArgPos);

llvm::Value* EmitAsmInput(const TargetInfo::ConstraintInfo &Info,
                          const Expr *InputExpr, std::string &ConstraintStr);

llvm::Value* EmitAsmInputLValue(const TargetInfo::ConstraintInfo &Info,
                                LValue InputValue, QualType InputType,
                                std::string &ConstraintStr,
                                SourceLocation Loc);

/// Attempts to statically evaluate the object size of E. If that
/// fails, emits code to figure the size of E out for us. This is
/// pass_object_size aware.
///
/// If EmittedExpr is non-null, this will use that instead of re-emitting E.
llvm::Value *evaluateOrEmitBuiltinObjectSize(const Expr *E, unsigned Type,
                                             llvm::IntegerType *ResType,
                                             llvm::Value *EmittedE,
                                             bool IsDynamic);

/// Emits the size of E, as required by __builtin_object_size. This
/// function is aware of pass_object_size parameters, and will act accordingly
/// if E is a parameter with the pass_object_size attribute.
llvm::Value *emitBuiltinObjectSize(const Expr *E, unsigned Type,
                                   llvm::IntegerType *ResType,
                                   llvm::Value *EmittedE,
                                   bool IsDynamic);

void emitZeroOrPatternForAutoVarInit(QualType type, const VarDecl &D,
                                     Address Loc);

4209public:
4210#ifndef NDEBUG
// Determine whether the given argument is an Objective-C method
// that may have type parameters in its signature.
static bool isObjCMethodWithTypeParams(const ObjCMethodDecl *method) {
  const DeclContext *dc = method->getDeclContext();
  if (const ObjCInterfaceDecl *classDecl= dyn_cast<ObjCInterfaceDecl>(dc)) {
    return classDecl->getTypeParamListAsWritten();
  }

  if (const ObjCCategoryDecl *catDecl = dyn_cast<ObjCCategoryDecl>(dc)) {
    return catDecl->getTypeParamList();
  }

  return false;
}

template<typename T>
static bool isObjCMethodWithTypeParams(const T *) { return false; }
4228#endif

enum class EvaluationOrder {
  ///! No language constraints on evaluation order.
  Default,
  ///! Language semantics require left-to-right evaluation.
  ForceLeftToRight,
  ///! Language semantics require right-to-left evaluation.
  ForceRightToLeft
};

/// EmitCallArgs - Emit call arguments for a function.
template <typename T>
void EmitCallArgs(CallArgList &Args, const T *CallArgTypeInfo,
                  llvm::iterator_range<CallExpr::const_arg_iterator> ArgRange,
                  AbstractCallee AC = AbstractCallee(),
                  unsigned ParamsToSkip = 0,
                  EvaluationOrder Order = EvaluationOrder::Default) {
  SmallVector<QualType, 16> ArgTypes;
  CallExpr::const_arg_iterator Arg = ArgRange.begin();

  assert((ParamsToSkip == 0 || CallArgTypeInfo) &&(((ParamsToSkip == 0 || CallArgTypeInfo) && "Can't skip parameters if type info is not provided"
) ? static_cast<void> (0) : __assert_fail ("(ParamsToSkip == 0 || CallArgTypeInfo) && \"Can't skip parameters if type info is not provided\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 4250, __PRETTY_FUNCTION__))
         "Can't skip parameters if type info is not provided")(((ParamsToSkip == 0 || CallArgTypeInfo) && "Can't skip parameters if type info is not provided"
) ? static_cast<void> (0) : __assert_fail ("(ParamsToSkip == 0 || CallArgTypeInfo) && \"Can't skip parameters if type info is not provided\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 4250, __PRETTY_FUNCTION__));
  if (CallArgTypeInfo) {
4252#ifndef NDEBUG
    bool isGenericMethod = isObjCMethodWithTypeParams(CallArgTypeInfo);
4254#endif

    // First, use the argument types that the type info knows about
    for (auto I = CallArgTypeInfo->param_type_begin() + ParamsToSkip,
              E = CallArgTypeInfo->param_type_end();
         I != E; ++I, ++Arg) {
      assert(Arg != ArgRange.end() && "Running over edge of argument list!")((Arg != ArgRange.end() && "Running over edge of argument list!"
) ? static_cast<void> (0) : __assert_fail ("Arg != ArgRange.end() && \"Running over edge of argument list!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 4260, __PRETTY_FUNCTION__));
      assert((isGenericMethod ||(((isGenericMethod || ((*I)->isVariablyModifiedType() || (
*I).getNonReferenceType()->isObjCRetainableType() || getContext
() .getCanonicalType((*I).getNonReferenceType()) .getTypePtr(
) == getContext() .getCanonicalType((*Arg)->getType()) .getTypePtr
())) && "type mismatch in call argument!") ? static_cast
<void> (0) : __assert_fail ("(isGenericMethod || ((*I)->isVariablyModifiedType() || (*I).getNonReferenceType()->isObjCRetainableType() || getContext() .getCanonicalType((*I).getNonReferenceType()) .getTypePtr() == getContext() .getCanonicalType((*Arg)->getType()) .getTypePtr())) && \"type mismatch in call argument!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 4270, __PRETTY_FUNCTION__))
              ((*I)->isVariablyModifiedType() ||(((isGenericMethod || ((*I)->isVariablyModifiedType() || (
*I).getNonReferenceType()->isObjCRetainableType() || getContext
() .getCanonicalType((*I).getNonReferenceType()) .getTypePtr(
) == getContext() .getCanonicalType((*Arg)->getType()) .getTypePtr
())) && "type mismatch in call argument!") ? static_cast
<void> (0) : __assert_fail ("(isGenericMethod || ((*I)->isVariablyModifiedType() || (*I).getNonReferenceType()->isObjCRetainableType() || getContext() .getCanonicalType((*I).getNonReferenceType()) .getTypePtr() == getContext() .getCanonicalType((*Arg)->getType()) .getTypePtr())) && \"type mismatch in call argument!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 4270, __PRETTY_FUNCTION__))
               (*I).getNonReferenceType()->isObjCRetainableType() ||(((isGenericMethod || ((*I)->isVariablyModifiedType() || (
*I).getNonReferenceType()->isObjCRetainableType() || getContext
() .getCanonicalType((*I).getNonReferenceType()) .getTypePtr(
) == getContext() .getCanonicalType((*Arg)->getType()) .getTypePtr
())) && "type mismatch in call argument!") ? static_cast
<void> (0) : __assert_fail ("(isGenericMethod || ((*I)->isVariablyModifiedType() || (*I).getNonReferenceType()->isObjCRetainableType() || getContext() .getCanonicalType((*I).getNonReferenceType()) .getTypePtr() == getContext() .getCanonicalType((*Arg)->getType()) .getTypePtr())) && \"type mismatch in call argument!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 4270, __PRETTY_FUNCTION__))
               getContext()(((isGenericMethod || ((*I)->isVariablyModifiedType() || (
*I).getNonReferenceType()->isObjCRetainableType() || getContext
() .getCanonicalType((*I).getNonReferenceType()) .getTypePtr(
) == getContext() .getCanonicalType((*Arg)->getType()) .getTypePtr
())) && "type mismatch in call argument!") ? static_cast
<void> (0) : __assert_fail ("(isGenericMethod || ((*I)->isVariablyModifiedType() || (*I).getNonReferenceType()->isObjCRetainableType() || getContext() .getCanonicalType((*I).getNonReferenceType()) .getTypePtr() == getContext() .getCanonicalType((*Arg)->getType()) .getTypePtr())) && \"type mismatch in call argument!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 4270, __PRETTY_FUNCTION__))
                       .getCanonicalType((*I).getNonReferenceType())(((isGenericMethod || ((*I)->isVariablyModifiedType() || (
*I).getNonReferenceType()->isObjCRetainableType() || getContext
() .getCanonicalType((*I).getNonReferenceType()) .getTypePtr(
) == getContext() .getCanonicalType((*Arg)->getType()) .getTypePtr
())) && "type mismatch in call argument!") ? static_cast
<void> (0) : __assert_fail ("(isGenericMethod || ((*I)->isVariablyModifiedType() || (*I).getNonReferenceType()->isObjCRetainableType() || getContext() .getCanonicalType((*I).getNonReferenceType()) .getTypePtr() == getContext() .getCanonicalType((*Arg)->getType()) .getTypePtr())) && \"type mismatch in call argument!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 4270, __PRETTY_FUNCTION__))
                       .getTypePtr() ==(((isGenericMethod || ((*I)->isVariablyModifiedType() || (
*I).getNonReferenceType()->isObjCRetainableType() || getContext
() .getCanonicalType((*I).getNonReferenceType()) .getTypePtr(
) == getContext() .getCanonicalType((*Arg)->getType()) .getTypePtr
())) && "type mismatch in call argument!") ? static_cast
<void> (0) : __assert_fail ("(isGenericMethod || ((*I)->isVariablyModifiedType() || (*I).getNonReferenceType()->isObjCRetainableType() || getContext() .getCanonicalType((*I).getNonReferenceType()) .getTypePtr() == getContext() .getCanonicalType((*Arg)->getType()) .getTypePtr())) && \"type mismatch in call argument!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 4270, __PRETTY_FUNCTION__))
                   getContext()(((isGenericMethod || ((*I)->isVariablyModifiedType() || (
*I).getNonReferenceType()->isObjCRetainableType() || getContext
() .getCanonicalType((*I).getNonReferenceType()) .getTypePtr(
) == getContext() .getCanonicalType((*Arg)->getType()) .getTypePtr
())) && "type mismatch in call argument!") ? static_cast
<void> (0) : __assert_fail ("(isGenericMethod || ((*I)->isVariablyModifiedType() || (*I).getNonReferenceType()->isObjCRetainableType() || getContext() .getCanonicalType((*I).getNonReferenceType()) .getTypePtr() == getContext() .getCanonicalType((*Arg)->getType()) .getTypePtr())) && \"type mismatch in call argument!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 4270, __PRETTY_FUNCTION__))
                       .getCanonicalType((*Arg)->getType())(((isGenericMethod || ((*I)->isVariablyModifiedType() || (
*I).getNonReferenceType()->isObjCRetainableType() || getContext
() .getCanonicalType((*I).getNonReferenceType()) .getTypePtr(
) == getContext() .getCanonicalType((*Arg)->getType()) .getTypePtr
())) && "type mismatch in call argument!") ? static_cast
<void> (0) : __assert_fail ("(isGenericMethod || ((*I)->isVariablyModifiedType() || (*I).getNonReferenceType()->isObjCRetainableType() || getContext() .getCanonicalType((*I).getNonReferenceType()) .getTypePtr() == getContext() .getCanonicalType((*Arg)->getType()) .getTypePtr())) && \"type mismatch in call argument!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 4270, __PRETTY_FUNCTION__))
                       .getTypePtr())) &&(((isGenericMethod || ((*I)->isVariablyModifiedType() || (
*I).getNonReferenceType()->isObjCRetainableType() || getContext
() .getCanonicalType((*I).getNonReferenceType()) .getTypePtr(
) == getContext() .getCanonicalType((*Arg)->getType()) .getTypePtr
())) && "type mismatch in call argument!") ? static_cast
<void> (0) : __assert_fail ("(isGenericMethod || ((*I)->isVariablyModifiedType() || (*I).getNonReferenceType()->isObjCRetainableType() || getContext() .getCanonicalType((*I).getNonReferenceType()) .getTypePtr() == getContext() .getCanonicalType((*Arg)->getType()) .getTypePtr())) && \"type mismatch in call argument!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 4270, __PRETTY_FUNCTION__))
             "type mismatch in call argument!")(((isGenericMethod || ((*I)->isVariablyModifiedType() || (
*I).getNonReferenceType()->isObjCRetainableType() || getContext
() .getCanonicalType((*I).getNonReferenceType()) .getTypePtr(
) == getContext() .getCanonicalType((*Arg)->getType()) .getTypePtr
())) && "type mismatch in call argument!") ? static_cast
<void> (0) : __assert_fail ("(isGenericMethod || ((*I)->isVariablyModifiedType() || (*I).getNonReferenceType()->isObjCRetainableType() || getContext() .getCanonicalType((*I).getNonReferenceType()) .getTypePtr() == getContext() .getCanonicalType((*Arg)->getType()) .getTypePtr())) && \"type mismatch in call argument!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 4270, __PRETTY_FUNCTION__));
      ArgTypes.push_back(*I);
    }
  }

  // Either we've emitted all the call args, or we have a call to variadic
  // function.
  assert((Arg == ArgRange.end() || !CallArgTypeInfo ||(((Arg == ArgRange.end() || !CallArgTypeInfo || CallArgTypeInfo
->isVariadic()) && "Extra arguments in non-variadic function!"
) ? static_cast<void> (0) : __assert_fail ("(Arg == ArgRange.end() || !CallArgTypeInfo || CallArgTypeInfo->isVariadic()) && \"Extra arguments in non-variadic function!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 4279, __PRETTY_FUNCTION__))
          CallArgTypeInfo->isVariadic()) &&(((Arg == ArgRange.end() || !CallArgTypeInfo || CallArgTypeInfo
->isVariadic()) && "Extra arguments in non-variadic function!"
) ? static_cast<void> (0) : __assert_fail ("(Arg == ArgRange.end() || !CallArgTypeInfo || CallArgTypeInfo->isVariadic()) && \"Extra arguments in non-variadic function!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 4279, __PRETTY_FUNCTION__))
         "Extra arguments in non-variadic function!")(((Arg == ArgRange.end() || !CallArgTypeInfo || CallArgTypeInfo
->isVariadic()) && "Extra arguments in non-variadic function!"
) ? static_cast<void> (0) : __assert_fail ("(Arg == ArgRange.end() || !CallArgTypeInfo || CallArgTypeInfo->isVariadic()) && \"Extra arguments in non-variadic function!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/CodeGen/CodeGenFunction.h"
, 4279, __PRETTY_FUNCTION__));

  // If we still have any arguments, emit them using the type of the argument.
  for (auto *A : llvm::make_range(Arg, ArgRange.end()))
    ArgTypes.push_back(CallArgTypeInfo ? getVarArgType(A) : A->getType());

  EmitCallArgs(Args, ArgTypes, ArgRange, AC, ParamsToSkip, Order);
}

void EmitCallArgs(CallArgList &Args, ArrayRef<QualType> ArgTypes,
                  llvm::iterator_range<CallExpr::const_arg_iterator> ArgRange,
                  AbstractCallee AC = AbstractCallee(),
                  unsigned ParamsToSkip = 0,
                  EvaluationOrder Order = EvaluationOrder::Default);

/// EmitPointerWithAlignment - Given an expression with a pointer type,
/// emit the value and compute our best estimate of the alignment of the
/// pointee.
///
/// \param BaseInfo - If non-null, this will be initialized with
/// information about the source of the alignment and the may-alias
/// attribute.  Note that this function will conservatively fall back on
/// the type when it doesn't recognize the expression and may-alias will
/// be set to false.
///
/// One reasonable way to use this information is when there's a language
/// guarantee that the pointer must be aligned to some stricter value, and
/// we're simply trying to ensure that sufficiently obvious uses of under-
/// aligned objects don't get miscompiled; for example, a placement new
/// into the address of a local variable.  In such a case, it's quite
/// reasonable to just ignore the returned alignment when it isn't from an
/// explicit source.
Address EmitPointerWithAlignment(const Expr *Addr,
                                 LValueBaseInfo *BaseInfo = nullptr,
                                 TBAAAccessInfo *TBAAInfo = nullptr);

/// If \p E references a parameter with pass_object_size info or a constant
/// array size modifier, emit the object size divided by the size of \p EltTy.
/// Otherwise return null.
llvm::Value *LoadPassedObjectSize(const Expr *E, QualType EltTy);

void EmitSanitizerStatReport(llvm::SanitizerStatKind SSK);

struct MultiVersionResolverOption {
  llvm::Function *Function;
  FunctionDecl *FD;
  struct Conds {
    StringRef Architecture;
    llvm::SmallVector<StringRef, 8> Features;

    Conds(StringRef Arch, ArrayRef<StringRef> Feats)
        : Architecture(Arch), Features(Feats.begin(), Feats.end()) {}
  } Conditions;

  MultiVersionResolverOption(llvm::Function *F, StringRef Arch,
                             ArrayRef<StringRef> Feats)
      : Function(F), Conditions(Arch, Feats) {}
};

// Emits the body of a multiversion function's resolver. Assumes that the
// options are already sorted in the proper order, with the 'default' option
// last (if it exists).
void EmitMultiVersionResolver(llvm::Function *Resolver,
                              ArrayRef<MultiVersionResolverOption> Options);

static uint64_t GetX86CpuSupportsMask(ArrayRef<StringRef> FeatureStrs);

4346private:
QualType getVarArgType(const Expr *Arg);

void EmitDeclMetadata();

BlockByrefHelpers *buildByrefHelpers(llvm::StructType &byrefType,
                                const AutoVarEmission &emission);

void AddObjCARCExceptionMetadata(llvm::Instruction *Inst);

llvm::Value *GetValueForARMHint(unsigned BuiltinID);
llvm::Value *EmitX86CpuIs(const CallExpr *E);
llvm::Value *EmitX86CpuIs(StringRef CPUStr);
llvm::Value *EmitX86CpuSupports(const CallExpr *E);
llvm::Value *EmitX86CpuSupports(ArrayRef<StringRef> FeatureStrs);
llvm::Value *EmitX86CpuSupports(uint64_t Mask);
llvm::Value *EmitX86CpuInit();
llvm::Value *FormResolverCondition(const MultiVersionResolverOption &RO);
4364};

4366inline DominatingLLVMValue::saved_type
4367DominatingLLVMValue::save(CodeGenFunction &CGF, llvm::Value *value) {
if (!needsSaving(value)) return saved_type(value, false);

// Otherwise, we need an alloca.
auto align = CharUnits::fromQuantity(
          CGF.CGM.getDataLayout().getPrefTypeAlignment(value->getType()));
Address alloca =
  CGF.CreateTempAlloca(value->getType(), align, "cond-cleanup.save");
CGF.Builder.CreateStore(value, alloca);

return saved_type(alloca.getPointer(), true);
4378}

4380inline llvm::Value *DominatingLLVMValue::restore(CodeGenFunction &CGF,
                                               saved_type value) {
// If the value says it wasn't saved, trust that it's still dominating.
if (!value.getInt()) return value.getPointer();

// Otherwise, it should be an alloca instruction, as set up in save().
auto alloca = cast<llvm::AllocaInst>(value.getPointer());
return CGF.Builder.CreateAlignedLoad(alloca, alloca->getAlignment());
4388}

4390}  // end namespace CodeGen
4391}  // end namespace clang

4393#endif