Implements C++ ABI-specific code generation functions. More...

#include "/home/buildbot/as-worker-4/publish-doxygen-docs/llvm-project/clang/lib/CodeGen/CGCXXABI.h"

Classes
struct	AddedStructorArgCounts
	Similar to AddedStructorArgs, but only notes the number of additional arguments. More...

struct	AddedStructorArgs
	Additional implicit arguments to add to the beginning (Prefix) and end (Suffix) of a constructor / destructor arg list. More...

Public Types
enum	RecordArgABI { RAA_Default = 0 , RAA_DirectInMemory , RAA_Indirect }
	Specify how one should pass an argument of a record type. More...

using	DeleteOrMemberCallExpr = llvm::PointerUnion< const CXXDeleteExpr , const CXXMemberCallExpr >

Public Member Functions
virtual	~CGCXXABI ()

MangleContext &	getMangleContext ()
	Gets the mangle context.

virtual bool	HasThisReturn (GlobalDecl GD) const
	Returns true if the given constructor or destructor is one of the kinds that the ABI says returns 'this' (only applies when called non-virtually for destructors).

virtual bool	hasMostDerivedReturn (GlobalDecl GD) const

virtual bool	useSinitAndSterm () const

virtual bool	canCallMismatchedFunctionType () const
	Returns true if the target allows calling a function through a pointer with a different signature than the actual function (or equivalently, bitcasting a function or function pointer to a different function type).

virtual bool	classifyReturnType (CGFunctionInfo &FI) const =0
	If the C++ ABI requires the given type be returned in a particular way, this method sets RetAI and returns true.

virtual RecordArgABI	getRecordArgABI (const CXXRecordDecl *RD) const =0
	Returns how an argument of the given record type should be passed.

virtual bool	isSRetParameterAfterThis () const
	Returns true if the implicit 'sret' parameter comes after the implicit 'this' parameter of C++ instance methods.

virtual bool	isPermittedToBeHomogeneousAggregate (const CXXRecordDecl *RD) const
	Returns true if the ABI permits the argument to be a homogeneous aggregate.

virtual llvm::Type *	ConvertMemberPointerType (const MemberPointerType *MPT)
	Find the LLVM type used to represent the given member pointer type.

virtual CGCallee	EmitLoadOfMemberFunctionPointer (CodeGenFunction &CGF, const Expr E, Address This, llvm::Value &ThisPtrForCall, llvm::Value MemPtr, const MemberPointerType MPT)
	Load a member function from an object and a member function pointer.

virtual llvm::Value *	EmitMemberDataPointerAddress (CodeGenFunction &CGF, const Expr E, Address Base, llvm::Value MemPtr, const MemberPointerType *MPT)
	Calculate an l-value from an object and a data member pointer.

virtual llvm::Value *	EmitMemberPointerConversion (CodeGenFunction &CGF, const CastExpr E, llvm::Value Src)
	Perform a derived-to-base, base-to-derived, or bitcast member pointer conversion.

virtual llvm::Constant *	EmitMemberPointerConversion (const CastExpr E, llvm::Constant Src)
	Perform a derived-to-base, base-to-derived, or bitcast member pointer conversion on a constant value.

virtual bool	isZeroInitializable (const MemberPointerType *MPT)
	Return true if the given member pointer can be zero-initialized (in the C++ sense) with an LLVM zeroinitializer.

virtual bool	isMemberPointerConvertible (const MemberPointerType *MPT) const
	Return whether or not a member pointers type is convertible to an IR type.

virtual llvm::Constant *	EmitNullMemberPointer (const MemberPointerType *MPT)
	Create a null member pointer of the given type.

virtual llvm::Constant *	EmitMemberFunctionPointer (const CXXMethodDecl *MD)
	Create a member pointer for the given method.

virtual llvm::Constant *	EmitMemberDataPointer (const MemberPointerType *MPT, CharUnits offset)
	Create a member pointer for the given field.

virtual llvm::Constant *	EmitMemberPointer (const APValue &MP, QualType MPT)
	Create a member pointer for the given member pointer constant.

virtual llvm::Value *	EmitMemberPointerComparison (CodeGenFunction &CGF, llvm::Value L, llvm::Value R, const MemberPointerType *MPT, bool Inequality)
	Emit a comparison between two member pointers. Returns an i1.

virtual llvm::Value *	EmitMemberPointerIsNotNull (CodeGenFunction &CGF, llvm::Value MemPtr, const MemberPointerType MPT)
	Determine if a member pointer is non-null. Returns an i1.

virtual void	emitVirtualObjectDelete (CodeGenFunction &CGF, const CXXDeleteExpr DE, Address Ptr, QualType ElementType, const CXXDestructorDecl Dtor)=0

virtual void	emitRethrow (CodeGenFunction &CGF, bool isNoReturn)=0

virtual void	emitThrow (CodeGenFunction &CGF, const CXXThrowExpr *E)=0

virtual llvm::GlobalVariable *	getThrowInfo (QualType T)

virtual bool	canSpeculativelyEmitVTable (const CXXRecordDecl *RD) const =0
	Determine whether it's possible to emit a vtable for `RD`, even though we do not know that the vtable has been marked as used by semantic analysis.

virtual void	emitBeginCatch (CodeGenFunction &CGF, const CXXCatchStmt *C)=0

virtual llvm::CallInst *	emitTerminateForUnexpectedException (CodeGenFunction &CGF, llvm::Value *Exn)

virtual llvm::Constant *	getAddrOfRTTIDescriptor (QualType Ty)=0

virtual CatchTypeInfo	getAddrOfCXXCatchHandlerType (QualType Ty, QualType CatchHandlerType)=0

virtual CatchTypeInfo	getCatchAllTypeInfo ()

virtual bool	shouldTypeidBeNullChecked (QualType SrcRecordTy)=0

virtual void	EmitBadTypeidCall (CodeGenFunction &CGF)=0

virtual llvm::Value *	EmitTypeid (CodeGenFunction &CGF, QualType SrcRecordTy, Address ThisPtr, llvm::Type *StdTypeInfoPtrTy)=0

virtual bool	shouldDynamicCastCallBeNullChecked (bool SrcIsPtr, QualType SrcRecordTy)=0

virtual bool	shouldEmitExactDynamicCast (QualType DestRecordTy)=0

virtual llvm::Value *	emitDynamicCastCall (CodeGenFunction &CGF, Address Value, QualType SrcRecordTy, QualType DestTy, QualType DestRecordTy, llvm::BasicBlock *CastEnd)=0

virtual llvm::Value *	emitDynamicCastToVoid (CodeGenFunction &CGF, Address Value, QualType SrcRecordTy)=0

virtual llvm::Value *	emitExactDynamicCast (CodeGenFunction &CGF, Address Value, QualType SrcRecordTy, QualType DestTy, QualType DestRecordTy, llvm::BasicBlock CastSuccess, llvm::BasicBlock CastFail)=0
	Emit a dynamic_cast from SrcRecordTy to DestRecordTy.

virtual bool	EmitBadCastCall (CodeGenFunction &CGF)=0

virtual llvm::Value *	GetVirtualBaseClassOffset (CodeGenFunction &CGF, Address This, const CXXRecordDecl ClassDecl, const CXXRecordDecl BaseClassDecl)=0

virtual llvm::BasicBlock *	EmitCtorCompleteObjectHandler (CodeGenFunction &CGF, const CXXRecordDecl *RD)

virtual void	initializeHiddenVirtualInheritanceMembers (CodeGenFunction &CGF, const CXXRecordDecl *RD)
	Emit the code to initialize hidden members required to handle virtual inheritance, if needed by the ABI.

virtual void	EmitCXXConstructors (const CXXConstructorDecl *D)=0
	Emit constructor variants required by this ABI.

virtual AddedStructorArgCounts	buildStructorSignature (GlobalDecl GD, SmallVectorImpl< CanQualType > &ArgTys)=0
	Build the signature of the given constructor or destructor variant by adding any required parameters.

virtual bool	useThunkForDtorVariant (const CXXDestructorDecl *Dtor, CXXDtorType DT) const =0
	Returns true if the given destructor type should be emitted as a linkonce delegating thunk, regardless of whether the dtor is defined in this TU or not.

virtual void	setCXXDestructorDLLStorage (llvm::GlobalValue GV, const CXXDestructorDecl Dtor, CXXDtorType DT) const

virtual llvm::GlobalValue::LinkageTypes	getCXXDestructorLinkage (GVALinkage Linkage, const CXXDestructorDecl *Dtor, CXXDtorType DT) const

virtual void	EmitCXXDestructors (const CXXDestructorDecl *D)=0
	Emit destructor variants required by this ABI.

virtual const CXXRecordDecl *	getThisArgumentTypeForMethod (GlobalDecl GD)
	Get the type of the implicit "this" parameter used by a method.

virtual Address	adjustThisArgumentForVirtualFunctionCall (CodeGenFunction &CGF, GlobalDecl GD, Address This, bool VirtualCall)
	Perform ABI-specific "this" argument adjustment required prior to a call of a virtual function.

void	buildThisParam (CodeGenFunction &CGF, FunctionArgList &Params)
	Build a parameter variable suitable for 'this'.

virtual void	addImplicitStructorParams (CodeGenFunction &CGF, QualType &ResTy, FunctionArgList &Params)=0
	Insert any ABI-specific implicit parameters into the parameter list for a function.

virtual CharUnits	getVirtualFunctionPrologueThisAdjustment (GlobalDecl GD)
	Get the ABI-specific "this" parameter adjustment to apply in the prologue of a virtual function.

virtual void	EmitInstanceFunctionProlog (CodeGenFunction &CGF)=0
	Emit the ABI-specific prolog for the function.

virtual AddedStructorArgs	getImplicitConstructorArgs (CodeGenFunction &CGF, const CXXConstructorDecl *D, CXXCtorType Type, bool ForVirtualBase, bool Delegating)=0

AddedStructorArgCounts	addImplicitConstructorArgs (CodeGenFunction &CGF, const CXXConstructorDecl *D, CXXCtorType Type, bool ForVirtualBase, bool Delegating, CallArgList &Args)
	Add any ABI-specific implicit arguments needed to call a constructor.

virtual llvm::Value *	getCXXDestructorImplicitParam (CodeGenFunction &CGF, const CXXDestructorDecl *DD, CXXDtorType Type, bool ForVirtualBase, bool Delegating)=0
	Get the implicit (second) parameter that comes after the "this" pointer, or nullptr if there is isn't one.

virtual void	EmitDestructorCall (CodeGenFunction &CGF, const CXXDestructorDecl *DD, CXXDtorType Type, bool ForVirtualBase, bool Delegating, Address This, QualType ThisTy)=0
	Emit the destructor call.

virtual void	emitVTableDefinitions (CodeGenVTables &CGVT, const CXXRecordDecl *RD)=0
	Emits the VTable definitions required for the given record type.

virtual bool	isVirtualOffsetNeededForVTableField (CodeGenFunction &CGF, CodeGenFunction::VPtr Vptr)=0
	Checks if ABI requires extra virtual offset for vtable field.

virtual bool	doStructorsInitializeVPtrs (const CXXRecordDecl *VTableClass)=0
	Checks if ABI requires to initialize vptrs for given dynamic class.

virtual llvm::Constant *	getVTableAddressPoint (BaseSubobject Base, const CXXRecordDecl *VTableClass)=0
	Get the address point of the vtable for the given base subobject.

virtual llvm::Value *	getVTableAddressPointInStructor (CodeGenFunction &CGF, const CXXRecordDecl RD, BaseSubobject Base, const CXXRecordDecl NearestVBase)=0
	Get the address point of the vtable for the given base subobject while building a constructor or a destructor.

virtual llvm::GlobalVariable *	getAddrOfVTable (const CXXRecordDecl *RD, CharUnits VPtrOffset)=0
	Get the address of the vtable for the given record decl which should be used for the vptr at the given offset in RD.

virtual CGCallee	getVirtualFunctionPointer (CodeGenFunction &CGF, GlobalDecl GD, Address This, llvm::Type *Ty, SourceLocation Loc)=0
	Build a virtual function pointer in the ABI-specific way.

virtual llvm::Value *	EmitVirtualDestructorCall (CodeGenFunction &CGF, const CXXDestructorDecl *Dtor, CXXDtorType DtorType, Address This, DeleteOrMemberCallExpr E)=0
	Emit the ABI-specific virtual destructor call.

virtual void	adjustCallArgsForDestructorThunk (CodeGenFunction &CGF, GlobalDecl GD, CallArgList &CallArgs)

virtual void	emitVirtualInheritanceTables (const CXXRecordDecl *RD)=0
	Emit any tables needed to implement virtual inheritance.

virtual bool	exportThunk ()=0

virtual void	setThunkLinkage (llvm::Function *Thunk, bool ForVTable, GlobalDecl GD, bool ReturnAdjustment)=0

virtual llvm::Value *	performThisAdjustment (CodeGenFunction &CGF, Address This, const CXXRecordDecl *UnadjustedClass, const ThunkInfo &TI)=0

virtual llvm::Value *	performReturnAdjustment (CodeGenFunction &CGF, Address Ret, const CXXRecordDecl *UnadjustedClass, const ReturnAdjustment &RA)=0

virtual void	EmitReturnFromThunk (CodeGenFunction &CGF, RValue RV, QualType ResultType)

virtual size_t	getSrcArgforCopyCtor (const CXXConstructorDecl *, FunctionArgList &Args) const =0

virtual std::vector< CharUnits >	getVBPtrOffsets (const CXXRecordDecl *RD)
	Gets the offsets of all the virtual base pointers in a given class.

virtual StringRef	GetPureVirtualCallName ()=0
	Gets the pure virtual member call function.

virtual StringRef	GetDeletedVirtualCallName ()=0
	Gets the deleted virtual member call name.

virtual CharUnits	GetArrayCookieSize (const CXXNewExpr *expr)
	Returns the extra size required in order to store the array cookie for the given new-expression.

virtual Address	InitializeArrayCookie (CodeGenFunction &CGF, Address NewPtr, llvm::Value NumElements, const CXXNewExpr expr, QualType ElementType)
	Initialize the array cookie for the given allocation.

virtual void	ReadArrayCookie (CodeGenFunction &CGF, Address Ptr, const CXXDeleteExpr expr, QualType ElementType, llvm::Value &NumElements, llvm::Value *&AllocPtr, CharUnits &CookieSize)
	Reads the array cookie associated with the given pointer, if it has one.

virtual bool	NeedsVTTParameter (GlobalDecl GD)
	Return whether the given global decl needs a VTT parameter.

virtual void	EmitGuardedInit (CodeGenFunction &CGF, const VarDecl &D, llvm::GlobalVariable *DeclPtr, bool PerformInit)=0
	Emits the guarded initializer and destructor setup for the given variable, given that it couldn't be emitted as a constant.

virtual void	registerGlobalDtor (CodeGenFunction &CGF, const VarDecl &D, llvm::FunctionCallee Dtor, llvm::Constant *Addr)=0
	Emit code to force the execution of a destructor during global teardown.

virtual void	EmitThreadLocalInitFuncs (CodeGenModule &CGM, ArrayRef< const VarDecl * > CXXThreadLocals, ArrayRef< llvm::Function * > CXXThreadLocalInits, ArrayRef< const VarDecl * > CXXThreadLocalInitVars)=0
	Emits ABI-required functions necessary to initialize thread_local variables in this translation unit.

virtual bool	usesThreadWrapperFunction (const VarDecl *VD) const =0

virtual LValue	EmitThreadLocalVarDeclLValue (CodeGenFunction &CGF, const VarDecl *VD, QualType LValType)=0
	Emit a reference to a non-local thread_local variable (including triggering the initialization of all thread_local variables in its translation unit).

virtual void	emitCXXStructor (GlobalDecl GD)=0
	Emit a single constructor/destructor with the given type from a C++ constructor Decl.

virtual std::pair< llvm::Value , const CXXRecordDecl >	LoadVTablePtr (CodeGenFunction &CGF, Address This, const CXXRecordDecl *RD)=0
	Load a vtable from This, an object of polymorphic type RD, or from one of its virtual bases if it does not have its own vtable.

Protected Member Functions
	CGCXXABI (CodeGenModule &CGM)

ImplicitParamDecl *	getThisDecl (CodeGenFunction &CGF)

llvm::Value *	getThisValue (CodeGenFunction &CGF)

Address	getThisAddress (CodeGenFunction &CGF)

void	ErrorUnsupportedABI (CodeGenFunction &CGF, StringRef S)
	Issue a diagnostic about unsupported features in the ABI.

llvm::Constant *	GetBogusMemberPointer (QualType T)
	Get a null value for unsupported member pointers.

ImplicitParamDecl *&	getStructorImplicitParamDecl (CodeGenFunction &CGF)

llvm::Value *&	getStructorImplicitParamValue (CodeGenFunction &CGF)

llvm::Value *	loadIncomingCXXThis (CodeGenFunction &CGF)
	Loads the incoming C++ this pointer as it was passed by the caller.

void	setCXXABIThisValue (CodeGenFunction &CGF, llvm::Value *ThisPtr)

ASTContext &	getContext () const

bool	mayNeedDestruction (const VarDecl *VD) const

bool	isEmittedWithConstantInitializer (const VarDecl *VD, bool InspectInitForWeakDef=false) const
	Determine whether we will definitely emit this variable with a constant initializer, either because the language semantics demand it or because we know that the initializer is a constant.

virtual bool	requiresArrayCookie (const CXXDeleteExpr *E, QualType eltType)

virtual bool	requiresArrayCookie (const CXXNewExpr *E)

virtual bool	isThisCompleteObject (GlobalDecl GD) const =0
	Determine whether there's something special about the rules of the ABI tell us that 'this' is a complete object within the given function.

virtual bool	constructorsAndDestructorsReturnThis () const

llvm::Constant *	getMemberPointerAdjustment (const CastExpr *E)
	A utility method for computing the offset required for the given base-to-derived or derived-to-base member-pointer conversion.

virtual CharUnits	getArrayCookieSizeImpl (QualType elementType)
	Returns the extra size required in order to store the array cookie for the given type.

virtual llvm::Value *	readArrayCookieImpl (CodeGenFunction &IGF, Address ptr, CharUnits cookieSize)
	Reads the array cookie for an allocation which is known to have one.

Protected Attributes
CodeGenModule &	CGM

std::unique_ptr< MangleContext >	MangleCtx

Friends
class	CodeGenModule

Detailed Description

Implements C++ ABI-specific code generation functions.

Definition at line 43 of file CGCXXABI.h.

Member Typedef Documentation

◆ DeleteOrMemberCallExpr

using clang::CodeGen::CGCXXABI::DeleteOrMemberCallExpr = llvm::PointerUnion<const CXXDeleteExpr *, const CXXMemberCallExpr *>

Definition at line 484 of file CGCXXABI.h.

Member Enumeration Documentation

◆ RecordArgABI

enum clang::CodeGen::CGCXXABI::RecordArgABI

Specify how one should pass an argument of a record type.

Enumerator

RAA_Default

Pass it using the normal C aggregate rules for the ABI, potentially introducing extra copies and passing some or all of it in registers.

RAA_DirectInMemory

Pass it on the stack using its defined layout.

The argument must be evaluated directly into the correct stack position in the arguments area, and the call machinery must not move it or introduce extra copies.

RAA_Indirect

Pass it as a pointer to temporary memory.

Definition at line 150 of file CGCXXABI.h.

Constructor & Destructor Documentation

◆ CGCXXABI()

clang::CodeGen::CGCXXABI::CGCXXABI ( CodeGenModule & CGM )

inlineprotected

Definition at line 50 of file CGCXXABI.h.

◆ ~CGCXXABI()

CGCXXABI::~CGCXXABI ( )

virtual

Definition at line 21 of file CGCXXABI.cpp.

Member Function Documentation

◆ addImplicitConstructorArgs()

CGCXXABI::AddedStructorArgCounts CGCXXABI::addImplicitConstructorArgs	(	CodeGenFunction &	CGF,
		const CXXConstructorDecl *	D,
		CXXCtorType	Type,
		bool	ForVirtualBase,
		bool	Delegating,
		CallArgList &	Args
	)

Add any ABI-specific implicit arguments needed to call a constructor.

Returns: The number of arguments added at the beginning and end of the call, which is typically zero or one.

Definition at line 346 of file CGCXXABI.cpp.

References clang::CodeGen::CallArgList::add(), D, clang::Delegating, clang::CodeGen::RValue::get(), getImplicitConstructorArgs(), clang::CodeGen::CGCXXABI::AddedStructorArgs::Prefix, and clang::CodeGen::CGCXXABI::AddedStructorArgs::Suffix.

◆ addImplicitStructorParams()

virtual void clang::CodeGen::CGCXXABI::addImplicitStructorParams	(	CodeGenFunction &	CGF,
		QualType &	ResTy,
		FunctionArgList &	Params
	)

pure virtual

Insert any ABI-specific implicit parameters into the parameter list for a function.

This generally involves extra data for constructors and destructors.

ABIs may also choose to override the return type, which has been initialized with the type of 'this' if HasThisReturn(CGF.CurGD) is true or the formal return type of the function otherwise.

◆ adjustCallArgsForDestructorThunk()

virtual void clang::CodeGen::CGCXXABI::adjustCallArgsForDestructorThunk	(	CodeGenFunction &	CGF,
		GlobalDecl	GD,
		CallArgList &	CallArgs
	)

inlinevirtual

Definition at line 494 of file CGCXXABI.h.

◆ adjustThisArgumentForVirtualFunctionCall()

virtual Address clang::CodeGen::CGCXXABI::adjustThisArgumentForVirtualFunctionCall	(	CodeGenFunction &	CGF,
		GlobalDecl	GD,
		Address	This,
		bool	VirtualCall
	)

inlinevirtual

Perform ABI-specific "this" argument adjustment required prior to a call of a virtual function.

The "VirtualCall" argument is true iff the call itself is virtual.

Definition at line 395 of file CGCXXABI.h.

◆ buildStructorSignature()

virtual AddedStructorArgCounts clang::CodeGen::CGCXXABI::buildStructorSignature	(	GlobalDecl	GD,
		SmallVectorImpl< CanQualType > &	ArgTys
	)

pure virtual

Build the signature of the given constructor or destructor variant by adding any required parameters.

For convenience, ArgTys has been initialized with the type of 'this'.

Referenced by clang::CodeGen::CodeGenTypes::arrangeCXXStructorDeclaration().

◆ buildThisParam()

void CGCXXABI::buildThisParam	(	CodeGenFunction &	CGF,
		FunctionArgList &	Params
	)

Build a parameter variable suitable for 'this'.

Definition at line 128 of file CGCXXABI.cpp.

References CGM, clang::ImplicitParamDecl::Create(), clang::CodeGen::CodeGenFunction::CurGD, clang::CXXThis, clang::IdentifierTable::get(), clang::ASTContext::getASTRecordLayout(), clang::CodeGen::CodeGenFunction::getContext(), clang::CodeGen::CodeGenModule::getContext(), clang::GlobalDecl::getDecl(), clang::Decl::getLocation(), clang::CXXRecordDecl::getNumVBases(), clang::CXXMethodDecl::getParent(), clang::CXXMethodDecl::getThisType(), clang::ASTContext::Idents, clang::CXXRecordDecl::isEffectivelyFinal(), and isThisCompleteObject().

◆ canCallMismatchedFunctionType()

virtual bool clang::CodeGen::CGCXXABI::canCallMismatchedFunctionType ( ) const

inlinevirtual

Returns true if the target allows calling a function through a pointer with a different signature than the actual function (or equivalently, bitcasting a function or function pointer to a different function type).

In principle in the most general case this could depend on the target, the calling convention, and the actual types of the arguments and return value. Here it just means whether the signature mismatch could ever be allowed; in other words, does the target do strict checking of signatures for all calls.

Definition at line 143 of file CGCXXABI.h.

Referenced by EmitDeclDestroy().

◆ canSpeculativelyEmitVTable()

virtual bool clang::CodeGen::CGCXXABI::canSpeculativelyEmitVTable ( const CXXRecordDecl * RD ) const

pure virtual

Determine whether it's possible to emit a vtable for RD, even though we do not know that the vtable has been marked as used by semantic analysis.

Referenced by shouldEmitAvailableExternallyVTable().

◆ classifyReturnType()

virtual bool clang::CodeGen::CGCXXABI::classifyReturnType ( CGFunctionInfo & FI ) const

pure virtual

If the C++ ABI requires the given type be returned in a particular way, this method sets RetAI and returns true.

◆ constructorsAndDestructorsReturnThis()

virtual bool clang::CodeGen::CGCXXABI::constructorsAndDestructorsReturnThis ( ) const

inlineprotectedvirtual

Definition at line 104 of file CGCXXABI.h.

References CGM, and clang::CodeGen::CodeGenModule::getCodeGenOpts().

Referenced by HasThisReturn().

◆ ConvertMemberPointerType()

llvm::Type * CGCXXABI::ConvertMemberPointerType ( const MemberPointerType * MPT )

virtual

Find the LLVM type used to represent the given member pointer type.

Definition at line 43 of file CGCXXABI.cpp.

References CGM, clang::CodeGen::CodeGenTypes::ConvertType(), clang::CodeGen::CodeGenModule::getContext(), clang::ASTContext::getPointerDiffType(), and clang::CodeGen::CodeGenModule::getTypes().

Referenced by clang::CodeGen::CodeGenTypes::ConvertType().

◆ doStructorsInitializeVPtrs()

virtual bool clang::CodeGen::CGCXXABI::doStructorsInitializeVPtrs ( const CXXRecordDecl * VTableClass )

pure virtual

Checks if ABI requires to initialize vptrs for given dynamic class.

◆ EmitBadCastCall()

virtual bool clang::CodeGen::CGCXXABI::EmitBadCastCall ( CodeGenFunction & CGF )

pure virtual

Referenced by EmitDynamicCastToNull().

◆ EmitBadTypeidCall()

virtual void clang::CodeGen::CGCXXABI::EmitBadTypeidCall ( CodeGenFunction & CGF )

pure virtual

Referenced by EmitTypeidFromVTable().

◆ emitBeginCatch()

virtual void clang::CodeGen::CGCXXABI::emitBeginCatch	(	CodeGenFunction &	CGF,
		const CXXCatchStmt *	C
	)

pure virtual

◆ EmitCtorCompleteObjectHandler()

llvm::BasicBlock * CGCXXABI::EmitCtorCompleteObjectHandler	(	CodeGenFunction &	CGF,
		const CXXRecordDecl *	RD
	)

virtual

Definition at line 305 of file CGCXXABI.cpp.

References CGM, ErrorUnsupportedABI(), clang::TargetInfo::getCXXABI(), clang::CodeGen::CodeGenModule::getTarget(), and clang::TargetCXXABI::hasConstructorVariants().

◆ EmitCXXConstructors()

virtual void clang::CodeGen::CGCXXABI::EmitCXXConstructors ( const CXXConstructorDecl * D )

pure virtual

Emit constructor variants required by this ABI.

Referenced by clang::CodeGen::CodeGenModule::EmitTopLevelDecl().

◆ EmitCXXDestructors()

virtual void clang::CodeGen::CGCXXABI::EmitCXXDestructors ( const CXXDestructorDecl * D )

pure virtual

Emit destructor variants required by this ABI.

Referenced by clang::CodeGen::CodeGenModule::EmitTopLevelDecl().

◆ emitCXXStructor()

virtual void clang::CodeGen::CGCXXABI::emitCXXStructor ( GlobalDecl GD )

pure virtual

Emit a single constructor/destructor with the given type from a C++ constructor Decl.

◆ EmitDestructorCall()

virtual void clang::CodeGen::CGCXXABI::EmitDestructorCall	(	CodeGenFunction &	CGF,
		const CXXDestructorDecl *	DD,
		CXXDtorType	Type,
		bool	ForVirtualBase,
		bool	Delegating,
		Address	This,
		QualType	ThisTy
	)

pure virtual

Emit the destructor call.

◆ emitDynamicCastCall()

virtual llvm::Value * clang::CodeGen::CGCXXABI::emitDynamicCastCall	(	CodeGenFunction &	CGF,
		Address	Value,
		QualType	SrcRecordTy,
		QualType	DestTy,
		QualType	DestRecordTy,
		llvm::BasicBlock *	CastEnd
	)

pure virtual

◆ emitDynamicCastToVoid()

virtual llvm::Value * clang::CodeGen::CGCXXABI::emitDynamicCastToVoid	(	CodeGenFunction &	CGF,
		Address	Value,
		QualType	SrcRecordTy
	)

pure virtual

◆ emitExactDynamicCast()

virtual llvm::Value * clang::CodeGen::CGCXXABI::emitExactDynamicCast	(	CodeGenFunction &	CGF,
		Address	Value,
		QualType	SrcRecordTy,
		QualType	DestTy,
		QualType	DestRecordTy,
		llvm::BasicBlock *	CastSuccess,
		llvm::BasicBlock *	CastFail
	)

pure virtual

Emit a dynamic_cast from SrcRecordTy to DestRecordTy.

The cast fails if the dynamic type of Value is not exactly DestRecordTy.

◆ EmitGuardedInit()

virtual void clang::CodeGen::CGCXXABI::EmitGuardedInit	(	CodeGenFunction &	CGF,
		const VarDecl &	D,
		llvm::GlobalVariable *	DeclPtr,
		bool	PerformInit
	)

pure virtual

Emits the guarded initializer and destructor setup for the given variable, given that it couldn't be emitted as a constant.

If PerformInit is false, the initialization has been folded to a constant and should not be performed.

The variable may be:

a static local variable
a static data member of a class template instantiation

◆ EmitInstanceFunctionProlog()

virtual void clang::CodeGen::CGCXXABI::EmitInstanceFunctionProlog ( CodeGenFunction & CGF )

pure virtual

Emit the ABI-specific prolog for the function.

◆ EmitLoadOfMemberFunctionPointer()

CGCallee CGCXXABI::EmitLoadOfMemberFunctionPointer	(	CodeGenFunction &	CGF,
		const Expr *	E,
		Address	This,
		llvm::Value *&	ThisPtrForCall,
		llvm::Value *	MemPtr,
		const MemberPointerType *	MPT
	)

virtual

Load a member function from an object and a member function pointer.

Apply the this-adjustment and set 'This' to the adjusted value.

Definition at line 47 of file CGCXXABI.cpp.

References clang::Type::castAs(), CGM, ErrorUnsupportedABI(), clang::CodeGen::CGCallee::forDirect(), clang::Type::getAs(), clang::CodeGen::CodeGenFunction::getAsNaturalPointerTo(), clang::MemberPointerType::getClass(), clang::CodeGen::CodeGenFunction::getContext(), clang::RecordType::getDecl(), clang::CodeGen::CodeGenModule::getLLVMContext(), clang::MemberPointerType::getPointeeType(), and clang::ASTContext::getRecordType().

◆ EmitMemberDataPointer()

llvm::Constant * CGCXXABI::EmitMemberDataPointer	(	const MemberPointerType *	MPT,
		CharUnits	offset
	)

virtual

Create a member pointer for the given field.

Definition at line 114 of file CGCXXABI.cpp.

References GetBogusMemberPointer().

Referenced by clang::CodeGen::CodeGenModule::getMemberPointerConstant().

◆ EmitMemberDataPointerAddress()

llvm::Value * CGCXXABI::EmitMemberDataPointerAddress	(	CodeGenFunction &	CGF,
		const Expr *	E,
		Address	Base,
		llvm::Value *	MemPtr,
		const MemberPointerType *	MPT
	)

virtual

Calculate an l-value from an object and a data member pointer.

Definition at line 65 of file CGCXXABI.cpp.

References ErrorUnsupportedABI(), and clang::CodeGen::CodeGenFunction::getLLVMContext().

◆ EmitMemberFunctionPointer()

llvm::Constant * CGCXXABI::EmitMemberFunctionPointer ( const CXXMethodDecl * MD )

virtual

Create a member pointer for the given method.

Definition at line 109 of file CGCXXABI.cpp.

References CGM, GetBogusMemberPointer(), clang::CodeGen::CodeGenModule::getContext(), clang::ASTContext::getMemberPointerType(), clang::CXXMethodDecl::getParent(), clang::ValueDecl::getType(), and clang::TypeDecl::getTypeForDecl().

Referenced by clang::CodeGen::CodeGenModule::getMemberPointerConstant().

◆ EmitMemberPointer()

llvm::Constant * CGCXXABI::EmitMemberPointer	(	const APValue &	MP,
		QualType	MPT
	)

virtual

Create a member pointer for the given member pointer constant.

Definition at line 119 of file CGCXXABI.cpp.

References GetBogusMemberPointer().

Referenced by clang::CodeGen::ConstantEmitter::tryEmitPrivate().

◆ EmitMemberPointerComparison()

llvm::Value * CGCXXABI::EmitMemberPointerComparison	(	CodeGenFunction &	CGF,
		llvm::Value *	L,
		llvm::Value *	R,
		const MemberPointerType *	MPT,
		bool	Inequality
	)

virtual

Emit a comparison between two member pointers. Returns an i1.

Definition at line 87 of file CGCXXABI.cpp.

References clang::CodeGen::CodeGenFunction::Builder, and ErrorUnsupportedABI().

Referenced by EmitCompare().

◆ EmitMemberPointerConversion() [1/2]

llvm::Value * CGCXXABI::EmitMemberPointerConversion	(	CodeGenFunction &	CGF,
		const CastExpr *	E,
		llvm::Value *	Src
	)

virtual

Perform a derived-to-base, base-to-derived, or bitcast member pointer conversion.

Definition at line 74 of file CGCXXABI.cpp.

References E, ErrorUnsupportedABI(), GetBogusMemberPointer(), and clang::Expr::getType().

◆ EmitMemberPointerConversion() [2/2]

llvm::Constant * CGCXXABI::EmitMemberPointerConversion	(	const CastExpr *	E,
		llvm::Constant *	Src
	)

virtual

Perform a derived-to-base, base-to-derived, or bitcast member pointer conversion on a constant value.

Definition at line 81 of file CGCXXABI.cpp.

References E, GetBogusMemberPointer(), and clang::Expr::getType().

◆ EmitMemberPointerIsNotNull()

llvm::Value * CGCXXABI::EmitMemberPointerIsNotNull	(	CodeGenFunction &	CGF,
		llvm::Value *	MemPtr,
		const MemberPointerType *	MPT
	)

virtual

Determine if a member pointer is non-null. Returns an i1.

Definition at line 97 of file CGCXXABI.cpp.

References clang::CodeGen::CodeGenFunction::Builder, and ErrorUnsupportedABI().

◆ EmitNullMemberPointer()

llvm::Constant * CGCXXABI::EmitNullMemberPointer ( const MemberPointerType * MPT )

virtual

Create a null member pointer of the given type.

Definition at line 105 of file CGCXXABI.cpp.

References GetBogusMemberPointer().

Referenced by clang::CodeGen::CodeGenModule::EmitNullConstant().

◆ emitRethrow()

virtual void clang::CodeGen::CGCXXABI::emitRethrow	(	CodeGenFunction &	CGF,
		bool	isNoReturn
	)

pure virtual

◆ EmitReturnFromThunk()

void CGCXXABI::EmitReturnFromThunk	(	CodeGenFunction &	CGF,
		RValue	RV,
		QualType	ResultType
	)

virtual

Definition at line 208 of file CGCXXABI.cpp.

References clang::CodeGen::CodeGenFunction::hasAggregateEvaluationKind().

◆ emitTerminateForUnexpectedException()

llvm::CallInst * CGCXXABI::emitTerminateForUnexpectedException	(	CodeGenFunction &	CGF,
		llvm::Value *	Exn
	)

virtual

Definition at line 332 of file CGCXXABI.cpp.

References clang::CodeGen::CodeGenFunction::CGM, clang::CodeGen::CodeGenFunction::EmitNounwindRuntimeCall(), and clang::CodeGen::CodeGenModule::getTerminateFn().

◆ EmitThreadLocalInitFuncs()

virtual void clang::CodeGen::CGCXXABI::EmitThreadLocalInitFuncs	(	CodeGenModule &	CGM,
		ArrayRef< const VarDecl * >	CXXThreadLocals,
		ArrayRef< llvm::Function * >	CXXThreadLocalInits,
		ArrayRef< const VarDecl * >	CXXThreadLocalInitVars
	)

pure virtual

Emits ABI-required functions necessary to initialize thread_local variables in this translation unit.

Parameters

CXXThreadLocals	- The thread_local declarations in this translation unit.
CXXThreadLocalInits	- If this translation unit contains any non-constant initialization or non-trivial destruction for thread_local variables, a list of functions to perform the initialization.

◆ EmitThreadLocalVarDeclLValue()

virtual LValue clang::CodeGen::CGCXXABI::EmitThreadLocalVarDeclLValue	(	CodeGenFunction &	CGF,
		const VarDecl *	VD,
		QualType	LValType
	)

pure virtual

Emit a reference to a non-local thread_local variable (including triggering the initialization of all thread_local variables in its translation unit).

Referenced by EmitGlobalVarDeclLValue().

◆ emitThrow()

virtual void clang::CodeGen::CGCXXABI::emitThrow	(	CodeGenFunction &	CGF,
		const CXXThrowExpr *	E
	)

pure virtual

◆ EmitTypeid()

virtual llvm::Value * clang::CodeGen::CGCXXABI::EmitTypeid	(	CodeGenFunction &	CGF,
		QualType	SrcRecordTy,
		Address	ThisPtr,
		llvm::Type *	StdTypeInfoPtrTy
	)

pure virtual

Referenced by EmitTypeidFromVTable().

◆ EmitVirtualDestructorCall()

virtual llvm::Value * clang::CodeGen::CGCXXABI::EmitVirtualDestructorCall	(	CodeGenFunction &	CGF,
		const CXXDestructorDecl *	Dtor,
		CXXDtorType	DtorType,
		Address	This,
		DeleteOrMemberCallExpr	E
	)

pure virtual

Emit the ABI-specific virtual destructor call.

◆ emitVirtualInheritanceTables()

virtual void clang::CodeGen::CGCXXABI::emitVirtualInheritanceTables ( const CXXRecordDecl * RD )

pure virtual

Emit any tables needed to implement virtual inheritance.

For Itanium, this emits virtual table tables. For the MSVC++ ABI, this emits virtual base tables.

Referenced by clang::CodeGen::CodeGenVTables::GenerateClassData().

◆ emitVirtualObjectDelete()

virtual void clang::CodeGen::CGCXXABI::emitVirtualObjectDelete	(	CodeGenFunction &	CGF,
		const CXXDeleteExpr *	DE,
		Address	Ptr,
		QualType	ElementType,
		const CXXDestructorDecl *	Dtor
	)

pure virtual

Referenced by EmitDestroyingObjectDelete(), and EmitObjectDelete().

◆ emitVTableDefinitions()

virtual void clang::CodeGen::CGCXXABI::emitVTableDefinitions	(	CodeGenVTables &	CGVT,
		const CXXRecordDecl *	RD
	)

pure virtual

Emits the VTable definitions required for the given record type.

Referenced by clang::CodeGen::CodeGenVTables::GenerateClassData().

◆ ErrorUnsupportedABI()

void CGCXXABI::ErrorUnsupportedABI	(	CodeGenFunction &	CGF,
		StringRef	S
	)

protected

Issue a diagnostic about unsupported features in the ABI.

Definition at line 29 of file CGCXXABI.cpp.

References clang::CodeGen::CodeGenFunction::CGM, clang::CodeGen::CodeGenFunction::CurCodeDecl, clang::DiagnosticsEngine::Error, clang::CodeGen::CodeGenFunction::getContext(), clang::DiagnosticsEngine::getCustomDiagID(), clang::CodeGen::CodeGenModule::getDiags(), clang::ASTContext::getFullLoc(), clang::Decl::getLocation(), and clang::DiagnosticsEngine::Report().

Referenced by EmitCtorCompleteObjectHandler(), EmitLoadOfMemberFunctionPointer(), EmitMemberDataPointerAddress(), EmitMemberPointerComparison(), EmitMemberPointerConversion(), EmitMemberPointerIsNotNull(), InitializeArrayCookie(), and readArrayCookieImpl().

◆ exportThunk()

virtual bool clang::CodeGen::CGCXXABI::exportThunk ( )

pure virtual

Referenced by setThunkProperties().

◆ getAddrOfCXXCatchHandlerType()

virtual CatchTypeInfo clang::CodeGen::CGCXXABI::getAddrOfCXXCatchHandlerType	(	QualType	Ty,
		QualType	CatchHandlerType
	)

pure virtual

◆ getAddrOfRTTIDescriptor()

virtual llvm::Constant * clang::CodeGen::CGCXXABI::getAddrOfRTTIDescriptor ( QualType Ty )

pure virtual

Referenced by clang::CodeGen::CodeGenModule::GetAddrOfRTTIDescriptor().

◆ getAddrOfVTable()

virtual llvm::GlobalVariable * clang::CodeGen::CGCXXABI::getAddrOfVTable	(	const CXXRecordDecl *	RD,
		CharUnits	VPtrOffset
	)

pure virtual

Get the address of the vtable for the given record decl which should be used for the vptr at the given offset in RD.

Referenced by BuildAppleKextVirtualCall(), clang::CodeGen::CodeGenVTables::GetAddrOfVTT(), and GetAddrOfVTTVTable().

◆ GetArrayCookieSize()

CharUnits CGCXXABI::GetArrayCookieSize ( const CXXNewExpr * expr )

virtual

Returns the extra size required in order to store the array cookie for the given new-expression.

May return 0 to indicate that no array cookie is required.

Several cases are filtered out before this method is called:

non-array allocations never need a cookie
calls to ::operator new(size_t, void*) never need a cookie

Parameters

expr	- the new-expression being allocated.

Definition at line 215 of file CGCXXABI.cpp.

References clang::ast_matchers::expr, getArrayCookieSizeImpl(), requiresArrayCookie(), and clang::CharUnits::Zero().

Referenced by CalculateCookiePadding().

◆ getArrayCookieSizeImpl()

CharUnits CGCXXABI::getArrayCookieSizeImpl ( QualType elementType )

protectedvirtual

Returns the extra size required in order to store the array cookie for the given type.

Assumes that an array cookie is required.

Definition at line 221 of file CGCXXABI.cpp.

References clang::CharUnits::Zero().

Referenced by GetArrayCookieSize(), and ReadArrayCookie().

◆ GetBogusMemberPointer()

llvm::Constant * CGCXXABI::GetBogusMemberPointer ( QualType T )

protected

Get a null value for unsupported member pointers.

Definition at line 38 of file CGCXXABI.cpp.

References CGM, clang::CodeGen::CodeGenTypes::ConvertType(), clang::CodeGen::CodeGenModule::getTypes(), and clang::T.

Referenced by EmitMemberDataPointer(), EmitMemberFunctionPointer(), EmitMemberPointer(), EmitMemberPointerConversion(), and EmitNullMemberPointer().

◆ getCatchAllTypeInfo()

CatchTypeInfo CGCXXABI::getCatchAllTypeInfo ( )

virtual

Definition at line 338 of file CGCXXABI.cpp.

◆ getContext()

ASTContext & clang::CodeGen::CGCXXABI::getContext ( ) const

inlineprotected

Definition at line 81 of file CGCXXABI.h.

References CGM, and clang::CodeGen::CodeGenModule::getContext().

Referenced by isEmittedWithConstantInitializer(), and mayNeedDestruction().

◆ getCXXDestructorImplicitParam()

virtual llvm::Value * clang::CodeGen::CGCXXABI::getCXXDestructorImplicitParam	(	CodeGenFunction &	CGF,
		const CXXDestructorDecl *	DD,
		CXXDtorType	Type,
		bool	ForVirtualBase,
		bool	Delegating
	)

pure virtual

Get the implicit (second) parameter that comes after the "this" pointer, or nullptr if there is isn't one.

Referenced by clang::CodeGen::getCXXDestructorImplicitParam().

◆ getCXXDestructorLinkage()

llvm::GlobalValue::LinkageTypes CGCXXABI::getCXXDestructorLinkage	(	GVALinkage	Linkage,
		const CXXDestructorDecl *	Dtor,
		CXXDtorType	DT
	)		const

virtual

Definition at line 321 of file CGCXXABI.cpp.

References CGM, and clang::CodeGen::CodeGenModule::getLLVMLinkageForDeclarator().

Referenced by clang::CodeGen::CodeGenModule::getFunctionLinkage().

◆ GetDeletedVirtualCallName()

virtual StringRef clang::CodeGen::CGCXXABI::GetDeletedVirtualCallName ( )

pure virtual

Gets the deleted virtual member call name.

◆ getImplicitConstructorArgs()

virtual AddedStructorArgs clang::CodeGen::CGCXXABI::getImplicitConstructorArgs	(	CodeGenFunction &	CGF,
		const CXXConstructorDecl *	D,
		CXXCtorType	Type,
		bool	ForVirtualBase,
		bool	Delegating
	)

pure virtual

Referenced by addImplicitConstructorArgs(), and clang::CodeGen::getImplicitCXXConstructorArgs().

◆ getMangleContext()

MangleContext & clang::CodeGen::CGCXXABI::getMangleContext ( )

inline

Gets the mangle context.

Definition at line 113 of file CGCXXABI.h.

References MangleCtx.

◆ getMemberPointerAdjustment()

llvm::Constant * CGCXXABI::getMemberPointerAdjustment ( const CastExpr * E )

protected

A utility method for computing the offset required for the given base-to-derived or derived-to-base member-pointer conversion.

Returns the adjustment, in bytes, required for the given member-pointer operation.

Does not handle virtual conversions (in case we ever fully support an ABI that allows this). Returns null if no adjustment is required.

Returns null if no adjustment is required.

Definition at line 286 of file CGCXXABI.cpp.

References clang::Type::castAs(), CGM, E, clang::Type::getAsCXXRecordDecl(), clang::CodeGen::CodeGenModule::GetNonVirtualBaseClassOffset(), and clang::Expr::getType().

◆ GetPureVirtualCallName()

virtual StringRef clang::CodeGen::CGCXXABI::GetPureVirtualCallName ( )

pure virtual

Gets the pure virtual member call function.

◆ getRecordArgABI()

virtual RecordArgABI clang::CodeGen::CGCXXABI::getRecordArgABI ( const CXXRecordDecl * RD ) const

pure virtual

Returns how an argument of the given record type should be passed.

Referenced by isInAllocaArgument().

◆ getSrcArgforCopyCtor()

virtual size_t clang::CodeGen::CGCXXABI::getSrcArgforCopyCtor	(	const CXXConstructorDecl *	,
		FunctionArgList &	Args
	)		const

pure virtual

Referenced by EmitMemberInitializer().

◆ getStructorImplicitParamDecl()

ImplicitParamDecl *& clang::CodeGen::CGCXXABI::getStructorImplicitParamDecl ( CodeGenFunction & CGF )

inlineprotected

Definition at line 69 of file CGCXXABI.h.

◆ getStructorImplicitParamValue()

llvm::Value *& clang::CodeGen::CGCXXABI::getStructorImplicitParamValue ( CodeGenFunction & CGF )

inlineprotected

Definition at line 72 of file CGCXXABI.h.

◆ getThisAddress()

Address CGCXXABI::getThisAddress ( CodeGenFunction & CGF )

protected

Definition at line 23 of file CGCXXABI.cpp.

References clang::Type::getPointeeType(), clang::ValueDecl::getType(), and clang::CodeGen::CodeGenFunction::makeNaturalAddressForPointer().

◆ getThisArgumentTypeForMethod()

virtual const CXXRecordDecl * clang::CodeGen::CGCXXABI::getThisArgumentTypeForMethod ( GlobalDecl GD )

inlinevirtual

Get the type of the implicit "this" parameter used by a method.

May return zero if no specific type is applicable, e.g. if the ABI expects the "this" parameter to point to some artificial offset in a complete object due to vbases being reordered.

Definition at line 387 of file CGCXXABI.h.

References clang::GlobalDecl::getDecl(), and clang::DeclContext::getParent().

Referenced by clang::CodeGen::CodeGenTypes::arrangeCXXMethodDeclaration(), clang::CodeGen::CodeGenTypes::arrangeCXXStructorDeclaration(), and commonEmitCXXMemberOrOperatorCall().

◆ getThisDecl()

ImplicitParamDecl * clang::CodeGen::CGCXXABI::getThisDecl ( CodeGenFunction & CGF )

inlineprotected

Definition at line 54 of file CGCXXABI.h.

Referenced by loadIncomingCXXThis(), and setCXXABIThisValue().

◆ getThisValue()

llvm::Value * clang::CodeGen::CGCXXABI::getThisValue ( CodeGenFunction & CGF )

inlineprotected

Definition at line 57 of file CGCXXABI.h.

◆ getThrowInfo()

virtual llvm::GlobalVariable * clang::CodeGen::CGCXXABI::getThrowInfo ( QualType T )

inlinevirtual

Definition at line 259 of file CGCXXABI.h.

◆ getVBPtrOffsets()

std::vector< CharUnits > CGCXXABI::getVBPtrOffsets ( const CXXRecordDecl * RD )

virtual

Gets the offsets of all the virtual base pointers in a given class.

Definition at line 342 of file CGCXXABI.cpp.

Referenced by EmitNullBaseClassInitialization().

◆ GetVirtualBaseClassOffset()

virtual llvm::Value * clang::CodeGen::CGCXXABI::GetVirtualBaseClassOffset	(	CodeGenFunction &	CGF,
		Address	This,
		const CXXRecordDecl *	ClassDecl,
		const CXXRecordDecl *	BaseClassDecl
	)

pure virtual

◆ getVirtualFunctionPointer()

virtual CGCallee clang::CodeGen::CGCXXABI::getVirtualFunctionPointer	(	CodeGenFunction &	CGF,
		GlobalDecl	GD,
		Address	This,
		llvm::Type *	Ty,
		SourceLocation	Loc
	)

pure virtual

Build a virtual function pointer in the ABI-specific way.

Referenced by clang::CodeGen::CGCallee::prepareConcreteCallee().

◆ getVirtualFunctionPrologueThisAdjustment()

virtual CharUnits clang::CodeGen::CGCXXABI::getVirtualFunctionPrologueThisAdjustment ( GlobalDecl GD )

inlinevirtual

Get the ABI-specific "this" parameter adjustment to apply in the prologue of a virtual function.

Definition at line 415 of file CGCXXABI.h.

References clang::CharUnits::Zero().

◆ getVTableAddressPoint()

virtual llvm::Constant * clang::CodeGen::CGCXXABI::getVTableAddressPoint	(	BaseSubobject	Base,
		const CXXRecordDecl *	VTableClass
	)

pure virtual

Get the address point of the vtable for the given base subobject.

◆ getVTableAddressPointInStructor()

virtual llvm::Value * clang::CodeGen::CGCXXABI::getVTableAddressPointInStructor	(	CodeGenFunction &	CGF,
		const CXXRecordDecl *	RD,
		BaseSubobject	Base,
		const CXXRecordDecl *	NearestVBase
	)

pure virtual

Get the address point of the vtable for the given base subobject while building a constructor or a destructor.

◆ hasMostDerivedReturn()

virtual bool clang::CodeGen::CGCXXABI::hasMostDerivedReturn ( GlobalDecl GD ) const

inlinevirtual

Definition at line 131 of file CGCXXABI.h.

Referenced by clang::CodeGen::CodeGenTypes::arrangeCXXConstructorCall(), and clang::CodeGen::CodeGenTypes::arrangeCXXStructorDeclaration().

◆ HasThisReturn()

virtual bool clang::CodeGen::CGCXXABI::HasThisReturn ( GlobalDecl GD ) const

inlinevirtual

Returns true if the given constructor or destructor is one of the kinds that the ABI says returns 'this' (only applies when called non-virtually for destructors).

There currently is no way to indicate if a destructor returns 'this' when called virtually, and code generation does not support the case.

Definition at line 123 of file CGCXXABI.h.

References constructorsAndDestructorsReturnThis(), clang::Dtor_Deleting, clang::GlobalDecl::getDecl(), and clang::GlobalDecl::getDtorType().

Referenced by clang::CodeGen::CodeGenTypes::arrangeCXXConstructorCall(), clang::CodeGen::CodeGenTypes::arrangeCXXStructorDeclaration(), and EmitDeclDestroy().

◆ InitializeArrayCookie()

Address CGCXXABI::InitializeArrayCookie	(	CodeGenFunction &	CGF,
		Address	NewPtr,
		llvm::Value *	NumElements,
		const CXXNewExpr *	expr,
		QualType	ElementType
	)

virtual

Initialize the array cookie for the given allocation.

Parameters

NewPtr	- a char* which is the presumed-non-null return value of the allocation function
NumElements	- the computed number of elements, potentially collapsed from the multidimensional array case; always a size_t
ElementType	- the base element allocated type, i.e. the allocated type after stripping all array types

Definition at line 226 of file CGCXXABI.cpp.

References ErrorUnsupportedABI(), and clang::CodeGen::Address::invalid().

◆ initializeHiddenVirtualInheritanceMembers()

virtual void clang::CodeGen::CGCXXABI::initializeHiddenVirtualInheritanceMembers	(	CodeGenFunction &	CGF,
		const CXXRecordDecl *	RD
	)

inlinevirtual

Emit the code to initialize hidden members required to handle virtual inheritance, if needed by the ABI.

Definition at line 319 of file CGCXXABI.h.

◆ isEmittedWithConstantInitializer()

bool CGCXXABI::isEmittedWithConstantInitializer	(	const VarDecl *	VD,
		bool	InspectInitForWeakDef = `false`
	)		const

protected

Determine whether we will definitely emit this variable with a constant initializer, either because the language semantics demand it or because we know that the initializer is a constant.

Definition at line 176 of file CGCXXABI.cpp.

References clang::VarDecl::evaluateValue(), getContext(), clang::VarDecl::getInitializingDeclaration(), clang::Redeclarable< decl_type >::getMostRecentDecl(), clang::Decl::hasAttr(), clang::VarDecl::hasConstantInitialization(), clang::VarDecl::hasInit(), clang::isUniqueGVALinkage(), clang::ValueDecl::isWeak(), and mayNeedDestruction().

◆ isMemberPointerConvertible()

virtual bool clang::CodeGen::CGCXXABI::isMemberPointerConvertible ( const MemberPointerType * MPT ) const

inlinevirtual

Return whether or not a member pointers type is convertible to an IR type.

Definition at line 213 of file CGCXXABI.h.

Referenced by clang::CodeGen::CodeGenTypes::isFuncParamTypeConvertible().

◆ isPermittedToBeHomogeneousAggregate()

virtual bool clang::CodeGen::CGCXXABI::isPermittedToBeHomogeneousAggregate ( const CXXRecordDecl * RD ) const

inlinevirtual

Returns true if the ABI permits the argument to be a homogeneous aggregate.

Definition at line 174 of file CGCXXABI.h.

◆ isSRetParameterAfterThis()

virtual bool clang::CodeGen::CGCXXABI::isSRetParameterAfterThis ( ) const

inlinevirtual

Returns true if the implicit 'sret' parameter comes after the implicit 'this' parameter of C++ instance methods.

Definition at line 169 of file CGCXXABI.h.

◆ isThisCompleteObject()

virtual bool clang::CodeGen::CGCXXABI::isThisCompleteObject ( GlobalDecl GD ) const

protectedpure virtual

Determine whether there's something special about the rules of the ABI tell us that 'this' is a complete object within the given function.

Obvious common logic like being defined on a final class will have been taken care of by the caller.

Referenced by buildThisParam().

◆ isVirtualOffsetNeededForVTableField()

virtual bool clang::CodeGen::CGCXXABI::isVirtualOffsetNeededForVTableField	(	CodeGenFunction &	CGF,
		CodeGenFunction::VPtr	Vptr
	)

pure virtual

Checks if ABI requires extra virtual offset for vtable field.

◆ isZeroInitializable()

bool CGCXXABI::isZeroInitializable ( const MemberPointerType * MPT )

virtual

Return true if the given member pointer can be zero-initialized (in the C++ sense) with an LLVM zeroinitializer.

Definition at line 123 of file CGCXXABI.cpp.

Referenced by clang::CodeGen::CodeGenTypes::isZeroInitializable().

◆ loadIncomingCXXThis()

llvm::Value * CGCXXABI::loadIncomingCXXThis ( CodeGenFunction & CGF )

protected

Loads the incoming C++ this pointer as it was passed by the caller.

Definition at line 152 of file CGCXXABI.cpp.

References clang::CodeGen::CodeGenFunction::Builder, clang::CodeGen::CGBuilderTy::CreateLoad(), clang::CodeGen::CodeGenFunction::GetAddrOfLocalVar(), and getThisDecl().

◆ LoadVTablePtr()

virtual std::pair< llvm::Value , const CXXRecordDecl > clang::CodeGen::CGCXXABI::LoadVTablePtr	(	CodeGenFunction &	CGF,
		Address	This,
		const CXXRecordDecl *	RD
	)

pure virtual

Load a vtable from This, an object of polymorphic type RD, or from one of its virtual bases if it does not have its own vtable.

Returns the vtable and the class from which the vtable was loaded.

◆ mayNeedDestruction()

bool CGCXXABI::mayNeedDestruction ( const VarDecl * VD ) const

protected

Definition at line 163 of file CGCXXABI.cpp.

References clang::Type::getAs(), clang::Type::getBaseElementTypeUnsafe(), getContext(), clang::ValueDecl::getType(), clang::Type::isIncompleteType(), clang::VarDecl::needsDestruction(), and clang::T.

Referenced by isEmittedWithConstantInitializer().

◆ NeedsVTTParameter()

bool CGCXXABI::NeedsVTTParameter ( GlobalDecl GD )

virtual

Return whether the given global decl needs a VTT parameter.

Definition at line 327 of file CGCXXABI.cpp.

◆ performReturnAdjustment()

virtual llvm::Value * clang::CodeGen::CGCXXABI::performReturnAdjustment	(	CodeGenFunction &	CGF,
		Address	Ret,
		const CXXRecordDecl *	UnadjustedClass,
		const ReturnAdjustment &	RA
	)

pure virtual

Referenced by PerformReturnAdjustment().

◆ performThisAdjustment()

virtual llvm::Value * clang::CodeGen::CGCXXABI::performThisAdjustment	(	CodeGenFunction &	CGF,
		Address	This,
		const CXXRecordDecl *	UnadjustedClass,
		const ThunkInfo &	TI
	)

pure virtual

◆ ReadArrayCookie()

void CGCXXABI::ReadArrayCookie	(	CodeGenFunction &	CGF,
		Address	Ptr,
		const CXXDeleteExpr *	expr,
		QualType	ElementType,
		llvm::Value *&	NumElements,
		llvm::Value *&	AllocPtr,
		CharUnits &	CookieSize
	)

virtual

Reads the array cookie associated with the given pointer, if it has one.

Parameters

Ptr	- a pointer to the first element in the array
ElementType	- the base element type of elements of the array
NumElements	- an out parameter which will be initialized with the number of elements allocated, or zero if there is no cookie
AllocPtr	- an out parameter which will be initialized with a char* pointing to the address returned by the allocation function
CookieSize	- an out parameter which will be initialized with the size of the cookie, or zero if there is no cookie

Definition at line 255 of file CGCXXABI.cpp.

References clang::CodeGen::CodeGenFunction::Builder, clang::CodeGen::CGBuilderTy::CreateConstInBoundsByteGEP(), clang::CodeGen::Address::emitRawPointer(), clang::ast_matchers::expr, getArrayCookieSizeImpl(), clang::CodeGen::CodeGenTypeCache::Int8Ty, readArrayCookieImpl(), requiresArrayCookie(), clang::CodeGen::Address::withElementType(), and clang::CharUnits::Zero().

Referenced by EmitArrayDelete().

◆ readArrayCookieImpl()

llvm::Value * CGCXXABI::readArrayCookieImpl	(	CodeGenFunction &	IGF,
		Address	ptr,
		CharUnits	cookieSize
	)

protectedvirtual

Reads the array cookie for an allocation which is known to have one.

This is called by the standard implementation of ReadArrayCookie.

Parameters

ptr	- a pointer to the allocation made for an array, as a char*
cookieSize	- the computed cookie size of an array

Other parameters are as above.

Returns: a size_t

Definition at line 276 of file CGCXXABI.cpp.

References ErrorUnsupportedABI(), and clang::CodeGen::CodeGenTypeCache::SizeTy.

Referenced by ReadArrayCookie().

◆ registerGlobalDtor()

virtual void clang::CodeGen::CGCXXABI::registerGlobalDtor	(	CodeGenFunction &	CGF,
		const VarDecl &	D,
		llvm::FunctionCallee	Dtor,
		llvm::Constant *	Addr
	)

pure virtual

Emit code to force the execution of a destructor during global teardown.

The default implementation of this uses atexit.

Parameters

Dtor	- a function taking a single pointer argument
Addr	- a pointer to pass to the destructor function.

Referenced by EmitDeclDestroy(), and pushTemporaryCleanup().

◆ requiresArrayCookie() [1/2]

bool CGCXXABI::requiresArrayCookie	(	const CXXDeleteExpr *	E,
		QualType	eltType
	)

protectedvirtual

Definition at line 236 of file CGCXXABI.cpp.

References clang::ast_matchers::expr, and clang::QualType::isDestructedType().

Referenced by GetArrayCookieSize(), and ReadArrayCookie().

◆ requiresArrayCookie() [2/2]

bool CGCXXABI::requiresArrayCookie ( const CXXNewExpr * E )

protectedvirtual

Definition at line 246 of file CGCXXABI.cpp.

References clang::ast_matchers::expr.

◆ setCXXABIThisValue()

void CGCXXABI::setCXXABIThisValue	(	CodeGenFunction &	CGF,
		llvm::Value *	ThisPtr
	)

protected

Initialize the 'this' slot.

Definition at line 157 of file CGCXXABI.cpp.

References getThisDecl().

◆ setCXXDestructorDLLStorage()

void CGCXXABI::setCXXDestructorDLLStorage	(	llvm::GlobalValue *	GV,
		const CXXDestructorDecl *	Dtor,
		CXXDtorType	DT
	)		const

virtual

Definition at line 314 of file CGCXXABI.cpp.

References CGM, and clang::CodeGen::CodeGenModule::setDLLImportDLLExport().

Referenced by clang::CodeGen::CodeGenModule::setDLLImportDLLExport().

◆ setThunkLinkage()

virtual void clang::CodeGen::CGCXXABI::setThunkLinkage	(	llvm::Function *	Thunk,
		bool	ForVTable,
		GlobalDecl	GD,
		bool	ReturnAdjustment
	)

pure virtual

Referenced by setThunkProperties().

◆ shouldDynamicCastCallBeNullChecked()

virtual bool clang::CodeGen::CGCXXABI::shouldDynamicCastCallBeNullChecked	(	bool	SrcIsPtr,
		QualType	SrcRecordTy
	)

pure virtual

◆ shouldEmitExactDynamicCast()

virtual bool clang::CodeGen::CGCXXABI::shouldEmitExactDynamicCast ( QualType DestRecordTy )

pure virtual

◆ shouldTypeidBeNullChecked()

virtual bool clang::CodeGen::CGCXXABI::shouldTypeidBeNullChecked ( QualType SrcRecordTy )

pure virtual

Referenced by EmitTypeidFromVTable().

◆ useSinitAndSterm()

virtual bool clang::CodeGen::CGCXXABI::useSinitAndSterm ( ) const

inlinevirtual

Definition at line 133 of file CGCXXABI.h.

◆ usesThreadWrapperFunction()

virtual bool clang::CodeGen::CGCXXABI::usesThreadWrapperFunction ( const VarDecl * VD ) const

pure virtual

Referenced by EmitGlobalVarDeclLValue().

◆ useThunkForDtorVariant()

virtual bool clang::CodeGen::CGCXXABI::useThunkForDtorVariant	(	const CXXDestructorDecl *	Dtor,
		CXXDtorType	DT
	)		const

pure virtual

Returns true if the given destructor type should be emitted as a linkonce delegating thunk, regardless of whether the dtor is defined in this TU or not.

Friends And Related Function Documentation

◆ CodeGenModule

friend class CodeGenModule

friend

Definition at line 44 of file CGCXXABI.h.

Member Data Documentation

◆ CGM

CodeGenModule& clang::CodeGen::CGCXXABI::CGM

protected

Definition at line 47 of file CGCXXABI.h.

Referenced by buildThisParam(), constructorsAndDestructorsReturnThis(), ConvertMemberPointerType(), EmitCtorCompleteObjectHandler(), EmitLoadOfMemberFunctionPointer(), EmitMemberFunctionPointer(), GetBogusMemberPointer(), getContext(), getCXXDestructorLinkage(), getMemberPointerAdjustment(), and setCXXDestructorDLLStorage().

◆ MangleCtx

std::unique_ptr<MangleContext> clang::CodeGen::CGCXXABI::MangleCtx

protected

Definition at line 48 of file CGCXXABI.h.

Referenced by getMangleContext().

The documentation for this class was generated from the following files:

lib/CodeGen/CGCXXABI.h
lib/CodeGen/CGCXXABI.cpp

Classes

Public Types

Public Member Functions

Protected Member Functions

Protected Attributes

Friends

Detailed Description

Member Typedef Documentation

◆ DeleteOrMemberCallExpr

Member Enumeration Documentation

◆ RecordArgABI

Constructor & Destructor Documentation

◆ CGCXXABI()

◆ ~CGCXXABI()

Member Function Documentation

◆ addImplicitConstructorArgs()

◆ addImplicitStructorParams()

◆ adjustCallArgsForDestructorThunk()

◆ adjustThisArgumentForVirtualFunctionCall()

◆ buildStructorSignature()

◆ buildThisParam()

◆ canCallMismatchedFunctionType()

◆ canSpeculativelyEmitVTable()

◆ classifyReturnType()

◆ constructorsAndDestructorsReturnThis()

◆ ConvertMemberPointerType()

◆ doStructorsInitializeVPtrs()

◆ EmitBadCastCall()

◆ EmitBadTypeidCall()

◆ emitBeginCatch()

◆ EmitCtorCompleteObjectHandler()

◆ EmitCXXConstructors()

◆ EmitCXXDestructors()

◆ emitCXXStructor()

◆ EmitDestructorCall()

◆ emitDynamicCastCall()

◆ emitDynamicCastToVoid()

◆ emitExactDynamicCast()

◆ EmitGuardedInit()

◆ EmitInstanceFunctionProlog()

◆ EmitLoadOfMemberFunctionPointer()

◆ EmitMemberDataPointer()

◆ EmitMemberDataPointerAddress()

◆ EmitMemberFunctionPointer()

◆ EmitMemberPointer()

◆ EmitMemberPointerComparison()

◆ EmitMemberPointerConversion() [1/2]

◆ EmitMemberPointerConversion() [2/2]

◆ EmitMemberPointerIsNotNull()

◆ EmitNullMemberPointer()

◆ emitRethrow()

◆ EmitReturnFromThunk()

◆ emitTerminateForUnexpectedException()

◆ EmitThreadLocalInitFuncs()

◆ EmitThreadLocalVarDeclLValue()

◆ emitThrow()

◆ EmitTypeid()

◆ EmitVirtualDestructorCall()

◆ emitVirtualInheritanceTables()

◆ emitVirtualObjectDelete()

◆ emitVTableDefinitions()

◆ ErrorUnsupportedABI()

◆ exportThunk()

◆ getAddrOfCXXCatchHandlerType()

◆ getAddrOfRTTIDescriptor()

◆ getAddrOfVTable()

◆ GetArrayCookieSize()

◆ getArrayCookieSizeImpl()

◆ GetBogusMemberPointer()

◆ getCatchAllTypeInfo()

◆ getContext()

◆ getCXXDestructorImplicitParam()

◆ getCXXDestructorLinkage()

◆ GetDeletedVirtualCallName()

◆ getImplicitConstructorArgs()

◆ getMangleContext()

◆ getMemberPointerAdjustment()

◆ GetPureVirtualCallName()

◆ getRecordArgABI()

◆ getSrcArgforCopyCtor()