clang  6.0.0svn
Macros | Enumerations | Functions
ItaniumCXXABI.cpp File Reference
#include "CGCXXABI.h"
#include "CGCleanup.h"
#include "CGRecordLayout.h"
#include "CGVTables.h"
#include "CodeGenFunction.h"
#include "CodeGenModule.h"
#include "TargetInfo.h"
#include "clang/CodeGen/ConstantInitBuilder.h"
#include "clang/AST/Mangle.h"
#include "clang/AST/Type.h"
#include "clang/AST/StmtCXX.h"
#include "llvm/IR/CallSite.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/IR/Value.h"
#include "clang/Basic/OpenCLImageTypes.def"
#include "clang/AST/BuiltinTypes.def"
#include "clang/AST/TypeNodes.def"
Include dependency graph for ItaniumCXXABI.cpp:

Go to the source code of this file.

Macros

#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix)   case BuiltinType::Id:
 
#define BUILTIN_TYPE(Id, SingletonId)
 
#define PLACEHOLDER_TYPE(Id, SingletonId)   case BuiltinType::Id:
 
#define TYPE(Class, Base)
 
#define ABSTRACT_TYPE(Class, Base)
 
#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base)   case Type::Class:
 
#define NON_CANONICAL_TYPE(Class, Base)   case Type::Class:
 
#define DEPENDENT_TYPE(Class, Base)   case Type::Class:
 
#define TYPE(Class, Base)
 
#define ABSTRACT_TYPE(Class, Base)
 
#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base)   case Type::Class:
 
#define NON_CANONICAL_TYPE(Class, Base)   case Type::Class:
 
#define DEPENDENT_TYPE(Class, Base)   case Type::Class:
 

Enumerations

enum  StructorCodegen
 

Functions

static llvm::Constant * getAllocateExceptionFn (CodeGenModule &CGM)
 
static llvm::Constant * getThrowFn (CodeGenModule &CGM)
 
static llvm::Constant * getItaniumDynamicCastFn (CodeGenFunction &CGF)
 
static llvm::Constant * getBadCastFn (CodeGenFunction &CGF)
 
static CharUnits computeOffsetHint (ASTContext &Context, const CXXRecordDecl *Src, const CXXRecordDecl *Dst)
 Compute the src2dst_offset hint as described in the Itanium C++ ABI [2.9.7]. More...
 
static llvm::Constant * getBadTypeidFn (CodeGenFunction &CGF)
 
static llvm::ValueperformTypeAdjustment (CodeGenFunction &CGF, Address InitialPtr, int64_t NonVirtualAdjustment, int64_t VirtualAdjustment, bool IsReturnAdjustment)
 
static llvm::Constant * getGuardAcquireFn (CodeGenModule &CGM, llvm::PointerType *GuardPtrTy)
 
static llvm::Constant * getGuardReleaseFn (CodeGenModule &CGM, llvm::PointerType *GuardPtrTy)
 
static llvm::Constant * getGuardAbortFn (CodeGenModule &CGM, llvm::PointerType *GuardPtrTy)
 
static void emitGlobalDtorWithCXAAtExit (CodeGenFunction &CGF, llvm::Constant *dtor, llvm::Constant *addr, bool TLS)
 Register a global destructor using __cxa_atexit. More...
 
static bool isThreadWrapperReplaceable (const VarDecl *VD, CodeGen::CodeGenModule &CGM)
 
static llvm::GlobalValue::LinkageTypes getThreadLocalWrapperLinkage (const VarDecl *VD, CodeGen::CodeGenModule &CGM)
 Get the appropriate linkage for the wrapper function. More...
 
static bool TypeInfoIsInStandardLibrary (const BuiltinType *Ty)
 TypeInfoIsInStandardLibrary - Given a builtin type, returns whether the type info for that type is defined in the standard library. More...
 
static bool TypeInfoIsInStandardLibrary (const PointerType *PointerTy)
 
static bool IsStandardLibraryRTTIDescriptor (QualType Ty)
 IsStandardLibraryRTTIDescriptor - Returns whether the type information for the given type exists in the standard library. More...
 
static bool ShouldUseExternalRTTIDescriptor (CodeGenModule &CGM, QualType Ty)
 ShouldUseExternalRTTIDescriptor - Returns whether the type information for the given type exists somewhere else, and that we should not emit the type information in this translation unit. More...
 
static bool IsIncompleteClassType (const RecordType *RecordTy)
 IsIncompleteClassType - Returns whether the given record type is incomplete. More...
 
static bool ContainsIncompleteClassType (QualType Ty)
 ContainsIncompleteClassType - Returns whether the given type contains an incomplete class type. More...
 
static bool CanUseSingleInheritance (const CXXRecordDecl *RD)
 
static llvm::GlobalVariable::LinkageTypes getTypeInfoLinkage (CodeGenModule &CGM, QualType Ty)
 Return the linkage that the type info and type info name constants should have for the given type. More...
 
static unsigned ComputeVMIClassTypeInfoFlags (const CXXBaseSpecifier *Base, SeenBases &Bases)
 ComputeVMIClassTypeInfoFlags - Compute the value of the flags member in abi::__vmi_class_type_info. More...
 
static unsigned ComputeVMIClassTypeInfoFlags (const CXXRecordDecl *RD)
 
static unsigned extractPBaseFlags (ASTContext &Ctx, QualType &Type)
 Compute the flags for a __pbase_type_info, and remove the corresponding pieces from Type. More...
 
static StructorCodegen getCodegenToUse (CodeGenModule &CGM, const CXXMethodDecl *MD)
 
static void emitConstructorDestructorAlias (CodeGenModule &CGM, GlobalDecl AliasDecl, GlobalDecl TargetDecl)
 
static llvm::Constant * getBeginCatchFn (CodeGenModule &CGM)
 
static llvm::Constant * getEndCatchFn (CodeGenModule &CGM)
 
static llvm::Constant * getGetExceptionPtrFn (CodeGenModule &CGM)
 
static llvm::ValueCallBeginCatch (CodeGenFunction &CGF, llvm::Value *Exn, bool EndMightThrow)
 Emits a call to __cxa_begin_catch and enters a cleanup to call __cxa_end_catch. More...
 
static void InitCatchParam (CodeGenFunction &CGF, const VarDecl &CatchParam, Address ParamAddr, SourceLocation Loc)
 A "special initializer" callback for initializing a catch parameter during catch initialization. More...
 
static llvm::Constant * getClangCallTerminateFn (CodeGenModule &CGM)
 Get or define the following function: void (i8* exn) nounwind noreturn This code is used only in C++. More...
 

Macro Definition Documentation

◆ ABSTRACT_TYPE [1/2]

#define ABSTRACT_TYPE (   Class,
  Base 
)

◆ ABSTRACT_TYPE [2/2]

#define ABSTRACT_TYPE (   Class,
  Base 
)

◆ BUILTIN_TYPE

#define BUILTIN_TYPE (   Id,
  SingletonId 
)

◆ DEPENDENT_TYPE [1/2]

#define DEPENDENT_TYPE (   Class,
  Base 
)    case Type::Class:

◆ DEPENDENT_TYPE [2/2]

#define DEPENDENT_TYPE (   Class,
  Base 
)    case Type::Class:

◆ IMAGE_TYPE

#define IMAGE_TYPE (   ImgType,
  Id,
  SingletonId,
  Access,
  Suffix 
)    case BuiltinType::Id:

◆ NON_CANONICAL_TYPE [1/2]

#define NON_CANONICAL_TYPE (   Class,
  Base 
)    case Type::Class:

◆ NON_CANONICAL_TYPE [2/2]

#define NON_CANONICAL_TYPE (   Class,
  Base 
)    case Type::Class:

◆ NON_CANONICAL_UNLESS_DEPENDENT_TYPE [1/2]

#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE (   Class,
  Base 
)    case Type::Class:

◆ NON_CANONICAL_UNLESS_DEPENDENT_TYPE [2/2]

#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE (   Class,
  Base 
)    case Type::Class:

◆ PLACEHOLDER_TYPE

#define PLACEHOLDER_TYPE (   Id,
  SingletonId 
)    case BuiltinType::Id:

◆ TYPE [1/2]

#define TYPE (   Class,
  Base 
)

◆ TYPE [2/2]

#define TYPE (   Class,
  Base 
)

Enumeration Type Documentation

◆ StructorCodegen

enum StructorCodegen
strong

Definition at line 3565 of file ItaniumCXXABI.cpp.

Function Documentation

◆ CallBeginCatch()

static llvm::Value* CallBeginCatch ( CodeGenFunction CGF,
llvm::Value Exn,
bool  EndMightThrow 
)
static

Emits a call to __cxa_begin_catch and enters a cleanup to call __cxa_end_catch.

Parameters
EndMightThrow- true if __cxa_end_catch might throw

Definition at line 3757 of file ItaniumCXXABI.cpp.

References clang::CodeGen::CodeGenFunction::CGM, clang::CodeGen::CodeGenFunction::EHStack, clang::CodeGen::CodeGenFunction::EmitNounwindRuntimeCall(), getBeginCatchFn(), and clang::CodeGen::NormalAndEHCleanup.

Referenced by InitCatchParam().

◆ CanUseSingleInheritance()

static bool CanUseSingleInheritance ( const CXXRecordDecl RD)
static

◆ computeOffsetHint()

static CharUnits computeOffsetHint ( ASTContext Context,
const CXXRecordDecl Src,
const CXXRecordDecl Dst 
)
static

Compute the src2dst_offset hint as described in the Itanium C++ ABI [2.9.7].

Definition at line 1187 of file ItaniumCXXABI.cpp.

Referenced by getBadTypeidFn().

◆ ComputeVMIClassTypeInfoFlags() [1/2]

static unsigned ComputeVMIClassTypeInfoFlags ( const CXXBaseSpecifier Base,
SeenBases &  Bases 
)
static

ComputeVMIClassTypeInfoFlags - Compute the value of the flags member in abi::__vmi_class_type_info.

Definition at line 3281 of file ItaniumCXXABI.cpp.

References clang::Type::getAs(), clang::CXXBaseSpecifier::getType(), and clang::CXXBaseSpecifier::isVirtual().

◆ ComputeVMIClassTypeInfoFlags() [2/2]

static unsigned ComputeVMIClassTypeInfoFlags ( const CXXRecordDecl RD)
static

Definition at line 3318 of file ItaniumCXXABI.cpp.

◆ ContainsIncompleteClassType()

static bool ContainsIncompleteClassType ( QualType  Ty)
static

ContainsIncompleteClassType - Returns whether the given type contains an incomplete class type.

This is true if

  • The given type is an incomplete class type.
  • The given type is a pointer type whose pointee type contains an incomplete class type.
  • The given type is a member pointer type whose class is an incomplete class type.
  • The given type is a member pointer type whoise pointee type contains an incomplete class type. is an indirect or direct pointer to an incomplete class type.

Definition at line 2792 of file ItaniumCXXABI.cpp.

References IsIncompleteClassType().

Referenced by extractPBaseFlags(), and getTypeInfoLinkage().

◆ emitConstructorDestructorAlias()

static void emitConstructorDestructorAlias ( CodeGenModule CGM,
GlobalDecl  AliasDecl,
GlobalDecl  TargetDecl 
)
static

◆ emitGlobalDtorWithCXAAtExit()

static void emitGlobalDtorWithCXAAtExit ( CodeGenFunction CGF,
llvm::Constant *  dtor,
llvm::Constant *  addr,
bool  TLS 
)
static

◆ extractPBaseFlags()

static unsigned extractPBaseFlags ( ASTContext Ctx,
QualType Type 
)
static

◆ getAllocateExceptionFn()

static llvm::Constant* getAllocateExceptionFn ( CodeGenModule CGM)
static

◆ getBadCastFn()

static llvm::Constant* getBadCastFn ( CodeGenFunction CGF)
static

◆ getBadTypeidFn()

static llvm::Constant* getBadTypeidFn ( CodeGenFunction CGF)
static

◆ getBeginCatchFn()

static llvm::Constant* getBeginCatchFn ( CodeGenModule CGM)
static

◆ getClangCallTerminateFn()

static llvm::Constant* getClangCallTerminateFn ( CodeGenModule CGM)
static

◆ getCodegenToUse()

static StructorCodegen getCodegenToUse ( CodeGenModule CGM,
const CXXMethodDecl MD 
)
static

◆ getEndCatchFn()

static llvm::Constant* getEndCatchFn ( CodeGenModule CGM)
static

◆ getGetExceptionPtrFn()

static llvm::Constant* getGetExceptionPtrFn ( CodeGenModule CGM)
static

◆ getGuardAbortFn()

static llvm::Constant* getGuardAbortFn ( CodeGenModule CGM,
llvm::PointerType *  GuardPtrTy 
)
static

◆ getGuardAcquireFn()

static llvm::Constant* getGuardAcquireFn ( CodeGenModule CGM,
llvm::PointerType *  GuardPtrTy 
)
static

◆ getGuardReleaseFn()

static llvm::Constant* getGuardReleaseFn ( CodeGenModule CGM,
llvm::PointerType *  GuardPtrTy 
)
static

◆ getItaniumDynamicCastFn()

static llvm::Constant* getItaniumDynamicCastFn ( CodeGenFunction CGF)
static

◆ getThreadLocalWrapperLinkage()

static llvm::GlobalValue::LinkageTypes getThreadLocalWrapperLinkage ( const VarDecl VD,
CodeGen::CodeGenModule CGM 
)
static

Get the appropriate linkage for the wrapper function.

This is essentially the weak form of the variable's linkage; every translation unit which needs the wrapper emits a copy, and we want the linker to merge them.

Definition at line 2257 of file ItaniumCXXABI.cpp.

References clang::Create(), clang::CodeGen::CodeGenModule::getLLVMLinkageVarDefinition(), clang::QualType::getNonReferenceType(), clang::ValueDecl::getType(), clang::VarDecl::hasDefinition(), clang::HiddenVisibility, clang::Type::isReferenceType(), and isThreadWrapperReplaceable().

◆ getThrowFn()

static llvm::Constant* getThrowFn ( CodeGenModule CGM)
static

◆ getTypeInfoLinkage()

static llvm::GlobalVariable::LinkageTypes getTypeInfoLinkage ( CodeGenModule CGM,
QualType  Ty 
)
static

◆ InitCatchParam()

static void InitCatchParam ( CodeGenFunction CGF,
const VarDecl CatchParam,
Address  ParamAddr,
SourceLocation  Loc 
)
static

A "special initializer" callback for initializing a catch parameter during catch initialization.

Definition at line 3770 of file ItaniumCXXABI.cpp.

References clang::CodeGen::CodeGenFunction::Builder, CallBeginCatch(), clang::CodeGen::CodeGenFunction::CGM, clang::CodeGen::CodeGenFunction::ConvertTypeForMem(), clang::CodeGen::CGBuilderTy::CreateBitCast(), clang::CodeGen::CGBuilderTy::CreateStore(), clang::CodeGen::CodeGenFunction::CreateTempAlloca(), clang::CodeGen::AggValueSlot::DoesNotNeedGCBarriers, clang::CodeGen::CodeGenFunction::EHStack, clang::CodeGen::CodeGenFunction::EmitAggExpr(), clang::CodeGen::CodeGenFunction::EmitAggregateCopy(), clang::CodeGen::CodeGenFunction::EmitARCInitWeak(), clang::CodeGen::CodeGenFunction::EmitARCRetainNonBlock(), clang::CodeGen::CodeGenFunction::EmitLoadOfComplex(), clang::CodeGen::CodeGenFunction::EmitLoadOfScalar(), clang::CodeGen::CodeGenFunction::EmitNounwindRuntimeCall(), clang::CodeGen::CodeGenFunction::EmitStoreOfComplex(), clang::CodeGen::CodeGenFunction::EmitStoreOfScalar(), clang::OpaqueValueExpr::findInCopyConstruct(), clang::CodeGen::AggValueSlot::forAddr(), clang::ASTContext::getCanonicalType(), clang::CodeGen::CodeGenModule::getClassPointerAlignment(), clang::CodeGen::CodeGenModule::getContext(), clang::CodeGen::CodeGenFunction::getEvaluationKind(), clang::CodeGen::CodeGenFunction::getExceptionFromSlot(), getGetExceptionPtrFn(), clang::VarDecl::getInit(), clang::Qualifiers::getObjCLifetime(), clang::Type::getPointeeType(), clang::CodeGen::Address::getPointer(), clang::CodeGen::CodeGenTypeCache::getPointerAlign(), clang::CanQual< T >::getQualifiers(), clang::CodeGen::TargetCodeGenInfo::getSizeOfUnwindException(), clang::CodeGen::CodeGenModule::getTargetCodeGenInfo(), clang::ValueDecl::getType(), clang::CodeGen::AggValueSlot::IsNotAliased, clang::CodeGen::AggValueSlot::IsNotDestructed, clang::Type::isRecordType(), clang::CodeGen::CodeGenFunction::MakeAddrLValue(), clang::CodeGen::CodeGenFunction::MakeNaturalAlignAddrLValue(), clang::Qualifiers::OCL_Autoreleasing, clang::Qualifiers::OCL_ExplicitNone, clang::Qualifiers::OCL_None, clang::Qualifiers::OCL_Strong, clang::Qualifiers::OCL_Weak, clang::CodeGen::EHScopeStack::popTerminate(), clang::CodeGen::EHScopeStack::pushTerminate(), clang::CodeGen::TEK_Aggregate, clang::CodeGen::TEK_Complex, clang::CodeGen::TEK_Scalar, and clang::CodeGen::Type.

◆ IsIncompleteClassType()

static bool IsIncompleteClassType ( const RecordType RecordTy)
static

IsIncompleteClassType - Returns whether the given record type is incomplete.

Definition at line 2777 of file ItaniumCXXABI.cpp.

References clang::RecordType::getDecl(), and clang::TagDecl::isCompleteDefinition().

Referenced by ContainsIncompleteClassType(), and extractPBaseFlags().

◆ IsStandardLibraryRTTIDescriptor()

static bool IsStandardLibraryRTTIDescriptor ( QualType  Ty)
static

IsStandardLibraryRTTIDescriptor - Returns whether the type information for the given type exists in the standard library.

Definition at line 2726 of file ItaniumCXXABI.cpp.

References TypeInfoIsInStandardLibrary().

◆ isThreadWrapperReplaceable()

static bool isThreadWrapperReplaceable ( const VarDecl VD,
CodeGen::CodeGenModule CGM 
)
static

◆ performTypeAdjustment()

static llvm::Value* performTypeAdjustment ( CodeGenFunction CGF,
Address  InitialPtr,
int64_t  NonVirtualAdjustment,
int64_t  VirtualAdjustment,
bool  IsReturnAdjustment 
)
static

Definition at line 1734 of file ItaniumCXXABI.cpp.

References clang::CodeGen::CodeGenFunction::Builder, clang::CodeGen::CodeGenFunction::ConvertType(), clang::CodeGen::CGBuilderTy::CreateAlignedLoad(), clang::CodeGen::CGBuilderTy::CreateBitCast(), clang::CodeGen::CGBuilderTy::CreateConstInBoundsByteGEP(), clang::CodeGen::CGBuilderTy::CreateConstInBoundsGEP(), clang::CodeGen::CGBuilderTy::CreateElementBitCast(), clang::CodeGen::CGBuilderTy::CreateLoad(), clang::CodeGen::CGBuilderTy::CreateStore(), clang::CodeGen::CodeGenFunction::CurGD, clang::ast_matchers::expr, clang::CharUnits::fromQuantity(), clang::CodeGen::RValue::get(), clang::CodeGen::Address::getAddressSpace(), clang::CodeGen::CodeGenFunction::getContext(), clang::GlobalDecl::getDecl(), clang::CodeGen::Address::getElementType(), clang::CXXNewExpr::getOperatorNew(), clang::CodeGen::Address::getPointer(), clang::CodeGen::CodeGenTypeCache::getPointerAlign(), clang::ASTContext::getPointerDiffType(), clang::CodeGen::CodeGenTypeCache::getSizeSize(), clang::CodeGen::Address::getType(), clang::ASTContext::getTypeAlignInChars(), clang::CodeGen::CodeGenTypeCache::Int8PtrTy, clang::CodeGen::CodeGenTypeCache::Int8Ty, clang::FunctionDecl::isReplaceableGlobalAllocationFunction(), clang::CharUnits::isZero(), clang::ReturnAdjustment::VirtualAdjustment::Itanium, clang::ThisAdjustment::VirtualAdjustment::Itanium, max(), clang::ReturnAdjustment::NonVirtual, clang::ThisAdjustment::NonVirtual, clang::CodeGen::CodeGenFunction::ReturnValue, clang::CodeGen::CodeGenTypeCache::SizeTy, clang::CodeGen::Type, clang::ReturnAdjustment::VirtualAdjustment::VBaseOffsetOffset, clang::ThisAdjustment::VirtualAdjustment::VCallOffsetOffset, clang::ReturnAdjustment::Virtual, and clang::ThisAdjustment::Virtual.

◆ ShouldUseExternalRTTIDescriptor()

static bool ShouldUseExternalRTTIDescriptor ( CodeGenModule CGM,
QualType  Ty 
)
static

ShouldUseExternalRTTIDescriptor - Returns whether the type information for the given type exists somewhere else, and that we should not emit the type information in this translation unit.

Assumes that it is not a standard-library type.

Definition at line 2743 of file ItaniumCXXABI.cpp.

Referenced by getTypeInfoLinkage().

◆ TypeInfoIsInStandardLibrary() [1/2]

static bool TypeInfoIsInStandardLibrary ( const BuiltinType Ty)
static

TypeInfoIsInStandardLibrary - Given a builtin type, returns whether the type info for that type is defined in the standard library.

Definition at line 2637 of file ItaniumCXXABI.cpp.

References clang::BuiltinType::getKind().

Referenced by IsStandardLibraryRTTIDescriptor(), and TypeInfoIsInStandardLibrary().

◆ TypeInfoIsInStandardLibrary() [2/2]

static bool TypeInfoIsInStandardLibrary ( const PointerType PointerTy)
static