clang 8.0.0

Classes | Public Types | Public Member Functions | Protected Member Functions | Protected Attributes | List of all members
clang::CodeGen::CGCXXABI Class Referenceabstract

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

`#include "/work/www-prereleases/8.0.0/rc2/builddocs/llvm.src/tools/clang/lib/CodeGen/CGCXXABI.h"`

Collaboration diagram for clang::CodeGen::CGCXXABI:
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## Classes
struct | AddedStructorArgs
| Notes how many arguments were added to the beginning (Prefix) and ending (Suffix) of an 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...

## Public Member Functions
virtual | ~CGCXXABI ()
MangleContext & | getMangleContext ()
| Gets the mangle context. More...
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). More...
virtual bool | hasMostDerivedReturn (GlobalDecl GD) 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). More...
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. More...
bool | canCopyArgument (const CXXRecordDecl *RD) const
| Returns true if C++ allows us to copy the memory of an object of type RD when it is passed as an argument. More...
virtual RecordArgABI | getRecordArgABI (const CXXRecordDecl *RD) const =0
| Returns how an argument of the given record type should be passed. More...
virtual bool | isSRetParameterAfterThis () const
| Returns true if the implicit 'sret' parameter comes after the implicit 'this' parameter of C++ instance methods. More...
virtual llvm::Type * | ConvertMemberPointerType (const MemberPointerType *MPT)
| Find the LLVM type used to represent the given member pointer type. More...
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. More...
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. More...
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. More...
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. More...
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. More...
virtual bool | isMemberPointerConvertible (const MemberPointerType *MPT) const
| Return whether or not a member pointers type is convertible to an IR type. More...
virtual llvm::Constant * | EmitNullMemberPointer (const MemberPointerType *MPT)
| Create a null member pointer of the given type. More...
virtual llvm::Constant * | EmitMemberFunctionPointer (const CXXMethodDecl *MD)
| Create a member pointer for the given method. More...
virtual llvm::Constant * | EmitMemberDataPointer (const MemberPointerType *MPT, CharUnits offset)
| Create a member pointer for the given field. More...
virtual llvm::Constant * | EmitMemberPointer (const APValue &MP, QualType MPT)
| Create a member pointer for the given member pointer constant. More...
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. More...
virtual llvm::Value * | EmitMemberPointerIsNotNull (CodeGenFunction &CGF, llvm::Value *MemPtr, const MemberPointerType *MPT)
| Determine if a member pointer is non-null. Returns an i1. More...
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. More...
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 (bool IsDeref, 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 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, QualType DestTy)=0
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. More...
virtual void | EmitCXXConstructors (const CXXConstructorDecl *D)=0
| Emit constructor variants required by this ABI. More...
virtual AddedStructorArgs | buildStructorSignature (const CXXMethodDecl *MD, StructorType T, SmallVectorImpl< CanQualType > &ArgTys)=0
| Build the signature of the given constructor or destructor variant by adding any required parameters. More...
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. More...
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. More...
virtual const CXXRecordDecl * | getThisArgumentTypeForMethod (const CXXMethodDecl *MD)
| Get the type of the implicit "this" parameter used by a method. More...
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. More...
void | buildThisParam (CodeGenFunction &CGF, FunctionArgList &Params)
| Build a parameter variable suitable for 'this'. More...
virtual void | addImplicitStructorParams (CodeGenFunction &CGF, QualType &ResTy, FunctionArgList &Params)=0
| Insert any ABI-specific implicit parameters into the parameter list for a function. More...
virtual CharUnits | getVirtualFunctionPrologueThisAdjustment (GlobalDecl GD)
| Get the ABI-specific "this" parameter adjustment to apply in the prologue of a virtual function. More...
virtual void | EmitInstanceFunctionProlog (CodeGenFunction &CGF)=0
| Emit the ABI-specific prolog for the function. More...
virtual AddedStructorArgs | addImplicitConstructorArgs (CodeGenFunction &CGF, const CXXConstructorDecl *D, CXXCtorType Type, bool ForVirtualBase, bool Delegating, CallArgList &Args)=0
| Add any ABI-specific implicit arguments needed to call a constructor. More...
virtual void | EmitDestructorCall (CodeGenFunction &CGF, const CXXDestructorDecl *DD, CXXDtorType Type, bool ForVirtualBase, bool Delegating, Address This)=0
| Emit the destructor call. More...
virtual void | emitVTableDefinitions (CodeGenVTables &CGVT, const CXXRecordDecl *RD)=0
| Emits the VTable definitions required for the given record type. More...
virtual bool | isVirtualOffsetNeededForVTableField (CodeGenFunction &CGF, CodeGenFunction::VPtr Vptr)=0
| Checks if ABI requires extra virtual offset for vtable field. More...
virtual bool | doStructorsInitializeVPtrs (const CXXRecordDecl *VTableClass)=0
| Checks if ABI requires to initialize vptrs for given dynamic class. More...
virtual llvm::Constant * | getVTableAddressPoint (BaseSubobject Base, const CXXRecordDecl *VTableClass)=0
| Get the address point of the vtable for the given base subobject. More...
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. More...
virtual llvm::Constant * | getVTableAddressPointForConstExpr (BaseSubobject Base, const CXXRecordDecl *VTableClass)=0
| Get the address point of the vtable for the given base subobject while building a constexpr. More...
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. More...
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. More...
virtual llvm::Value * | EmitVirtualDestructorCall (CodeGenFunction &CGF, const CXXDestructorDecl *Dtor, CXXDtorType DtorType, Address This, const CXXMemberCallExpr *CE)=0
| Emit the ABI-specific virtual destructor call. More...
virtual void | adjustCallArgsForDestructorThunk (CodeGenFunction &CGF, GlobalDecl GD, CallArgList &CallArgs)
virtual void | emitVirtualInheritanceTables (const CXXRecordDecl *RD)=0
| Emit any tables needed to implement virtual inheritance. More...
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 ThisAdjustment &TA)=0
virtual llvm::Value * | performReturnAdjustment (CodeGenFunction &CGF, Address Ret, 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. More...
virtual StringRef | GetPureVirtualCallName ()=0
| Gets the pure virtual member call function. More...
virtual StringRef | GetDeletedVirtualCallName ()=0
| Gets the deleted virtual member call name. More...
virtual CharUnits | GetArrayCookieSize (const CXXNewExpr *expr)
| Returns the extra size required in order to store the array cookie for the given new-expression. More...
virtual Address | InitializeArrayCookie (CodeGenFunction &CGF, Address NewPtr, llvm::Value *NumElements, const CXXNewExpr *expr, QualType ElementType)
| Initialize the array cookie for the given allocation. More...
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. More...
virtual bool | NeedsVTTParameter (GlobalDecl GD)
| Return whether the given global decl needs a VTT parameter. More...
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. More...
virtual void | registerGlobalDtor (CodeGenFunction &CGF, const VarDecl &D, llvm::Constant *Dtor, llvm::Constant *Addr)=0
| Emit code to force the execution of a destructor during global teardown. More...
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. More...
virtual bool | usesThreadWrapperFunction () 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). More...
virtual void | emitCXXStructor (const CXXMethodDecl *MD, StructorType Type)=0
| Emit a single constructor/destructor with the given type from a C++ constructor Decl. More...
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. More...

## 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. More...
llvm::Constant * | GetBogusMemberPointer (QualType T)
| Get a null value for unsupported member pointers. More...
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. More...
void | setCXXABIThisValue (CodeGenFunction &CGF, llvm::Value *ThisPtr)
ASTContext & | getContext () const
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. More...
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. More...
CharUnits | getMemberPointerPathAdjustment (const APValue &MP)
| Computes the non-virtual adjustment needed for a member pointer conversion along an inheritance path stored in an APValue. More...
virtual CharUnits | getArrayCookieSizeImpl (QualType elementType)
| Returns the extra size required in order to store the array cookie for the given type. More...
virtual llvm::Value * | readArrayCookieImpl (CodeGenFunction &IGF, Address ptr, CharUnits cookieSize)
| Reads the array cookie for an allocation which is known to have one. More...

## Protected Attributes
CodeGenModule & | CGM
std::unique_ptr< MangleContext > | MangleCtx

## Detailed Description

Implements C++ ABI-specific code generation functions.

Definition at line 44 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 126 of file CGCXXABI.h.

## Constructor & Destructor Documentation

## ◆ CGCXXABI()

clang::CodeGen::CGCXXABI::CGCXXABI | ( | CodeGenModule & | CGM | ) |
| inline protected

Definition at line 49 of file CGCXXABI.h.

## ◆ ~CGCXXABI()

CGCXXABI::~CGCXXABI | ( |  | ) |
| virtual

Definition at line 21 of file CGCXXABI.cpp.

## Member Function Documentation

## ◆ addImplicitConstructorArgs()

virtual AddedStructorArgs clang::CodeGen::CGCXXABI::addImplicitConstructorArgs | ( | CodeGenFunction & | CGF,
|  | const CXXConstructorDecl * | D,
|  | CXXCtorType | Type,
|  | bool | ForVirtualBase,
|  | bool | Delegating,
|  | CallArgList & | Args
| ) |  |
| pure virtual

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.

## ◆ 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.

Referenced by clang::CodeGen::CodeGenFunction::BuildFunctionArgList(), and clang::CodeGen::CodeGenFunction::StartThunk().

## ◆ adjustCallArgsForDestructorThunk()

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

Definition at line 435 of file CGCXXABI.h.

References clang::CodeGen::CreateItaniumCXXABI(), clang::CodeGen::CreateMicrosoftCXXABI(), and clang::ast_matchers::expr.

Referenced by clang::CodeGen::CodeGenFunction::EmitCallAndReturnForThunk().

## ◆ adjustThisArgumentForVirtualFunctionCall()

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

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 346 of file CGCXXABI.h.

## ◆ buildStructorSignature()

virtual AddedStructorArgs clang::CodeGen::CGCXXABI::buildStructorSignature | ( | const CXXMethodDecl * | MD,
|  | StructorType | T,
|  | 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::ImplicitParamDecl::CXXThis, clang::IdentifierTable::get(), clang::ASTContext::getASTRecordLayout(), clang::CodeGen::CodeGenModule::getContext(), clang::CodeGen::CodeGenFunction::getContext(), clang::GlobalDecl::getDecl(), clang::Decl::getLocation(), clang::CXXRecordDecl::getNumVBases(), clang::CXXMethodDecl::getParent(), clang::CXXMethodDecl::getThisType(), clang::Decl::hasAttr(), clang::ASTContext::Idents, and isThisCompleteObject().

Referenced by clang::CodeGen::CodeGenFunction::BuildFunctionArgList(), and clang::CodeGen::CodeGenFunction::StartThunk().

## ◆ canCallMismatchedFunctionType()

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

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 119 of file CGCXXABI.h.

References classifyReturnType().

Referenced by EmitDeclDestroy().

## ◆ canCopyArgument()

bool CGCXXABI::canCopyArgument | ( | const CXXRecordDecl * | RD | ) | const

Returns true if C++ allows us to copy the memory of an object of type RD when it is passed as an argument.

Definition at line 32 of file CGCXXABI.cpp.

References clang::RecordDecl::canPassInRegisters().

## ◆ 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.

Referenced by classifyReturnType().

## ◆ 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 281 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 | ( | const CXXMethodDecl * | MD,
|  | StructorType | Type
| ) |  |
| 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
| ) |  |
| 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,
|  | QualType | DestTy
| ) |  |
| pure virtual

## ◆ 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

Referenced by clang::CodeGen::CodeGenFunction::EmitCXXGuardedInit().

## ◆ EmitInstanceFunctionProlog()

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

Emit the ABI-specific prolog for the function.

Referenced by clang::CodeGen::CodeGenFunction::StartFunction(), and clang::CodeGen::CodeGenFunction::StartThunk().

## ◆ 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::CodeGen::CodeGenTypes::arrangeCXXMethodType(), CGM, ErrorUnsupportedABI(), clang::CodeGen::CGCallee::forDirect(), clang::Type::getAs(), clang::MemberPointerType::getClass(), clang::CodeGen::CodeGenTypes::GetFunctionType(), clang::MemberPointerType::getPointeeType(), clang::CodeGen::Address::getPointer(), and clang::CodeGen::CodeGenModule::getTypes().

## ◆ 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().

## ◆ 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 clang::CodeGen::CodeGenFunction::ConvertType(), ErrorUnsupportedABI(), clang::CodeGen::Address::getAddressSpace(), clang::MemberPointerType::getPointeeType(), and clang::CodeGen::Type.

## ◆ 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().

## ◆ 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(), and GetIntrinsic().

## ◆ 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 ErrorUnsupportedABI(), GetBogusMemberPointer(), and clang::Expr::getType().

Referenced by clang::CodeGen::CodeGenFunction::ShouldNullCheckClassCastValue().

## ◆ 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 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().

Referenced by clang::CodeGen::CodeGenFunction::EvaluateExprAsBool(), and clang::CodeGen::CodeGenFunction::ShouldNullCheckClassCastValue().

## ◆ 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::CodeGenFunction::ShouldNullCheckClassCastValue().

## ◆ 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 163 of file CGCXXABI.cpp.

Referenced by clang::CodeGen::CodeGenFunction::EmitCallAndReturnForThunk().

## ◆ emitTerminateForUnexpectedException()

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

Definition at line 309 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,
|  | const CXXMemberCallExpr * | CE
| ) |  |
| 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 23 of file CGCXXABI.cpp.

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 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 168 of file CGCXXABI.cpp.

References clang::CXXNewExpr::getAllocatedType(), getArrayCookieSizeImpl(), requiresArrayCookie(), and clang::CharUnits::Zero().

Referenced by CalculateCookiePadding().

## ◆ getArrayCookieSizeImpl()

CharUnits CGCXXABI::getArrayCookieSizeImpl | ( | QualType | elementType | ) |
| protected virtual

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 174 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::CodeGen::Type.

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

## ◆ getCatchAllTypeInfo()

CatchTypeInfo CGCXXABI::getCatchAllTypeInfo | ( |  | ) |
| virtual

Definition at line 315 of file CGCXXABI.cpp.

## ◆ getContext()

ASTContext& clang::CodeGen::CGCXXABI::getContext | ( |  | ) | const
| inline protected

Definition at line 81 of file CGCXXABI.h.

References clang::CodeGen::CodeGenModule::getContext().

Referenced by getMemberPointerPathAdjustment().

## ◆ getCXXDestructorLinkage()

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

Definition at line 297 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.

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

## ◆ getMangleContext()

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

Gets the mangle context.

Definition at line 97 of file CGCXXABI.h.

Referenced by clang::CodeGen::CodeGenFunction::createAtExitStub(), clang::CodeGen::CodeGenModule::EmitOMPThreadPrivateDecl(), clang::CodeGen::CodeGenFunction::EmitTypeCheck(), clang::CodeGen::CodeGenVTables::GenerateConstructionVTable(), clang::CodeGen::CodeGenVTables::GetAddrOfVTT(), getBlockCaptureStr(), clang::CodeGen::CodeGenModule::getBlockMangledName(), getMangledNameImpl(), and getTypeIdentifier().

## ◆ 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 240 of file CGCXXABI.cpp.

References CGM, clang::Type::getAsCXXRecordDecl(), clang::CastExpr::getCastKind(), clang::CodeGen::CodeGenModule::GetNonVirtualBaseClassOffset(), clang::CastExpr::getSubExpr(), clang::Expr::getType(), clang::CastExpr::path_begin(), and clang::CastExpr::path_end().

## ◆ getMemberPointerPathAdjustment()

CharUnits CGCXXABI::getMemberPointerPathAdjustment | ( | const APValue & | MP | ) |
| protected

Computes the non-virtual adjustment needed for a member pointer conversion along an inheritance path stored in an APValue.

Unlike getMemberPointerAdjustment(), the adjustment can be negative if the path is from a derived type to a base type.

Definition at line 258 of file CGCXXABI.cpp.

References clang::ASTContext::getASTRecordLayout(), clang::ASTRecordLayout::getBaseClassOffset(), getContext(), clang::Decl::getDeclContext(), clang::APValue::getMemberPointerDecl(), clang::APValue::getMemberPointerPath(), clang::APValue::isMemberPointerToDerivedMember(), and clang::CharUnits::Zero().

## ◆ GetPureVirtualCallName()

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

Gets the pure virtual member call function.

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

## ◆ 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 getRecordArgABI(), and isInAllocaArgument().

## ◆ getSrcArgforCopyCtor()

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

Referenced by clang::CodeGen::CodeGenFunction::EmitConstructorBody(), and EmitMemberInitializer().

## ◆ getStructorImplicitParamDecl()

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

Definition at line 69 of file CGCXXABI.h.

## ◆ getStructorImplicitParamValue()

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

Definition at line 72 of file CGCXXABI.h.

## ◆ getThisAddress()

Address clang::CodeGen::CGCXXABI::getThisAddress | ( | CodeGenFunction & | CGF | ) |
| inline protected

Definition at line 59 of file CGCXXABI.h.

## ◆ getThisArgumentTypeForMethod()

virtual const CXXRecordDecl* clang::CodeGen::CGCXXABI::getThisArgumentTypeForMethod | ( | const CXXMethodDecl * | MD | ) |
| inline virtual

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 338 of file CGCXXABI.h.

References clang::CXXMethodDecl::getParent().

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

## ◆ getThisDecl()

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

Definition at line 53 of file CGCXXABI.h.

Referenced by loadIncomingCXXThis(), and setCXXABIThisValue().

## ◆ getThisValue()

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

Definition at line 56 of file CGCXXABI.h.

## ◆ getThrowInfo()

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

Definition at line 238 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 319 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 | ) |
| inline virtual

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

Definition at line 366 of file CGCXXABI.h.

## ◆ 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.

## ◆ getVTableAddressPointForConstExpr()

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

Get the address point of the vtable for the given base subobject while building a constexpr.

## ◆ 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
| inline virtual

Definition at line 109 of file CGCXXABI.h.

Referenced by clang::CodeGen::CodeGenTypes::arrangeCXXConstructorCall(), clang::CodeGen::CodeGenTypes::arrangeCXXStructorDeclaration(), clang::CodeGen::CodeGenFunction::BuildFunctionArgList(), clang::CodeGen::CodeGenFunction::EmitCallAndReturnForThunk(), and clang::CodeGen::CodeGenFunction::StartThunk().

## ◆ HasThisReturn()

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

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 107 of file CGCXXABI.h.

Referenced by clang::CodeGen::CodeGenTypes::arrangeCXXConstructorCall(), clang::CodeGen::CodeGenTypes::arrangeCXXStructorDeclaration(), clang::CodeGen::CodeGenFunction::BuildFunctionArgList(), clang::CodeGen::CodeGenFunction::EmitCallAndReturnForThunk(), EmitDeclDestroy(), and clang::CodeGen::CodeGenFunction::StartThunk().

## ◆ 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 179 of file CGCXXABI.cpp.

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

## ◆ initializeHiddenVirtualInheritanceMembers()

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

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

Definition at line 289 of file CGCXXABI.h.

## ◆ isMemberPointerConvertible()

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

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

Definition at line 186 of file CGCXXABI.h.

Referenced by clang::CodeGen::CodeGenTypes::ConvertType(), and clang::CodeGen::CodeGenTypes::isFuncParamTypeConvertible().

## ◆ isSRetParameterAfterThis()

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

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

Definition at line 149 of file CGCXXABI.h.

## ◆ isThisCompleteObject()

virtual bool clang::CodeGen::CGCXXABI::isThisCompleteObject | ( | GlobalDecl | GD | ) | const
| protected pure 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.

## ◆ NeedsVTTParameter()

bool CGCXXABI::NeedsVTTParameter | ( | GlobalDecl | GD | ) |
| virtual

Return whether the given global decl needs a VTT parameter.

Definition at line 304 of file CGCXXABI.cpp.

## ◆ performReturnAdjustment()

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

Referenced by PerformReturnAdjustment().

## ◆ performThisAdjustment()

virtual llvm::Value* clang::CodeGen::CGCXXABI::performThisAdjustment | ( | CodeGenFunction & | CGF,
|  | Address | This,
|  | const ThisAdjustment & | TA
| ) |  |
| pure virtual

Referenced by clang::CodeGen::CodeGenFunction::EmitCallAndReturnForThunk().

## ◆ 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 208 of file CGCXXABI.cpp.

References clang::CodeGen::CodeGenFunction::Builder, clang::CodeGen::CGBuilderTy::CreateConstInBoundsByteGEP(), clang::CodeGen::CGBuilderTy::CreateElementBitCast(), getArrayCookieSizeImpl(), clang::CodeGen::Address::getPointer(), clang::CodeGen::CodeGenTypeCache::Int8Ty, readArrayCookieImpl(), requiresArrayCookie(), and clang::CharUnits::Zero().

Referenced by EmitArrayDelete().

## ◆ readArrayCookieImpl()

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

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 230 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::Constant * | 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
| ) |  |
| protected virtual

Definition at line 189 of file CGCXXABI.cpp.

References clang::CXXDeleteExpr::doesUsualArrayDeleteWantSize(), and clang::QualType::isDestructedType().

Referenced by GetArrayCookieSize(), and ReadArrayCookie().

## ◆ requiresArrayCookie() [2/2]

bool CGCXXABI::requiresArrayCookie | ( | const CXXNewExpr * | E | ) |
| protected virtual

Definition at line 199 of file CGCXXABI.cpp.

References clang::CXXNewExpr::doesUsualArrayDeleteWantSize(), clang::CXXNewExpr::getAllocatedType(), and clang::QualType::isDestructedType().

## ◆ 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 290 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

## ◆ shouldTypeidBeNullChecked()

virtual bool clang::CodeGen::CGCXXABI::shouldTypeidBeNullChecked | ( | bool | IsDeref,
|  | QualType | SrcRecordTy
| ) |  |
| pure virtual

Referenced by EmitTypeidFromVTable().

## ◆ usesThreadWrapperFunction()

virtual bool clang::CodeGen::CGCXXABI::usesThreadWrapperFunction | ( |  | ) | 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.

## Member Data Documentation

## ◆ CGM

CodeGenModule& clang::CodeGen::CGCXXABI::CGM
| protected

Definition at line 46 of file CGCXXABI.h.

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

## ◆ MangleCtx

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

Definition at line 47 of file CGCXXABI.h.

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

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