TargetCodeGenInfo - This class organizes various target-specific codegeneration issues, like target-specific attributes, builtins and so on. More...

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

Inheritance diagram for clang::CodeGen::TargetCodeGenInfo:

[legend]

Classes
class	TargetOpenCLBlockHelper
	Interface class for filling custom fields of a block literal for OpenCL. More...

Public Member Functions
	TargetCodeGenInfo (std::unique_ptr< ABIInfo > Info)

virtual	~TargetCodeGenInfo ()

const ABIInfo &	getABIInfo () const
	getABIInfo() - Returns ABI info helper for the target.

const SwiftABIInfo &	getSwiftABIInfo () const
	Returns Swift ABI info helper for the target.

virtual void	setTargetAttributes (const Decl D, llvm::GlobalValue GV, CodeGen::CodeGenModule &M) const
	setTargetAttributes - Provides a convenient hook to handle extra target-specific attributes for the given global.

virtual void	emitTargetMetadata (CodeGen::CodeGenModule &CGM, const llvm::MapVector< GlobalDecl, StringRef > &MangledDeclNames) const
	emitTargetMetadata - Provides a convenient hook to handle extra target-specific metadata for the given globals.

virtual void	emitTargetGlobals (CodeGen::CodeGenModule &CGM) const
	Provides a convenient hook to handle extra target-specific globals.

virtual void	checkFunctionABI (CodeGenModule &CGM, const FunctionDecl *Decl) const
	Any further codegen related checks that need to be done on a function signature in a target specific manner.

virtual void	checkFunctionCallABI (CodeGenModule &CGM, SourceLocation CallLoc, const FunctionDecl Caller, const FunctionDecl Callee, const CallArgList &Args) const
	Any further codegen related checks that need to be done on a function call in a target specific manner.

virtual unsigned	getSizeOfUnwindException () const
	Determines the size of struct _Unwind_Exception on this platform, in 8-bit units.

virtual bool	extendPointerWithSExt () const
	Controls whether __builtin_extend_pointer should sign-extend pointers to uint64_t or zero-extend them (the default).

virtual int	getDwarfEHStackPointer (CodeGen::CodeGenModule &M) const
	Determines the DWARF register number for the stack pointer, for exception-handling purposes.

virtual bool	initDwarfEHRegSizeTable (CodeGen::CodeGenFunction &CGF, llvm::Value *Address) const
	Initializes the given DWARF EH register-size table, a char*.

virtual llvm::Value *	decodeReturnAddress (CodeGen::CodeGenFunction &CGF, llvm::Value *Address) const
	Performs the code-generation required to convert a return address as stored by the system into the actual address of the next instruction that will be executed.

virtual llvm::Value *	encodeReturnAddress (CodeGen::CodeGenFunction &CGF, llvm::Value *Address) const
	Performs the code-generation required to convert the address of an instruction into a return address suitable for storage by the system in a return slot.

virtual llvm::Value *	testFPKind (llvm::Value *V, unsigned BuiltinID, CGBuilderTy &Builder, CodeGenModule &CGM) const
	Performs a target specific test of a floating point value for things like IsNaN, Infinity, ... Nullptr is returned if no implementation exists.

virtual llvm::Type *	adjustInlineAsmType (CodeGen::CodeGenFunction &CGF, StringRef Constraint, llvm::Type *Ty) const
	Corrects the low-level LLVM type for a given constraint and "usual" type.

virtual bool	isScalarizableAsmOperand (CodeGen::CodeGenFunction &CGF, llvm::Type *Ty) const
	Target hook to decide whether an inline asm operand can be passed by value.

virtual void	addReturnRegisterOutputs (CodeGen::CodeGenFunction &CGF, CodeGen::LValue ReturnValue, std::string &Constraints, std::vector< llvm::Type * > &ResultRegTypes, std::vector< llvm::Type * > &ResultTruncRegTypes, std::vector< CodeGen::LValue > &ResultRegDests, std::string &AsmString, unsigned NumOutputs) const
	Adds constraints and types for result registers.

virtual bool	doesReturnSlotInterfereWithArgs () const
	doesReturnSlotInterfereWithArgs - Return true if the target uses an argument slot for an 'sret' type.

virtual StringRef	getARCRetainAutoreleasedReturnValueMarker () const
	Retrieve the address of a function to call immediately before calling objc_retainAutoreleasedReturnValue.

virtual bool	markARCOptimizedReturnCallsAsNoTail () const
	Determine whether a call to objc_retainAutoreleasedReturnValue or objc_unsafeClaimAutoreleasedReturnValue should be marked as 'notail'.

virtual llvm::Constant *	getUBSanFunctionSignature (CodeGen::CodeGenModule &CGM) const
	Return a constant used by UBSan as a signature to identify functions possessing type information, or 0 if the platform is unsupported.

virtual bool	isNoProtoCallVariadic (const CodeGen::CallArgList &args, const FunctionNoProtoType *fnType) const
	Determine whether a call to an unprototyped functions under the given calling convention should use the variadic convention or the non-variadic convention.

virtual void	getDependentLibraryOption (llvm::StringRef Lib, llvm::SmallString< 24 > &Opt) const
	Gets the linker options necessary to link a dependent library on this platform.

virtual void	getDetectMismatchOption (llvm::StringRef Name, llvm::StringRef Value, llvm::SmallString< 32 > &Opt) const
	Gets the linker options necessary to detect object file mismatches on this platform.

virtual unsigned	getOpenCLKernelCallingConv () const
	Get LLVM calling convention for OpenCL kernel.

virtual llvm::Constant *	getNullPointer (const CodeGen::CodeGenModule &CGM, llvm::PointerType *T, QualType QT) const
	Get target specific null pointer.

virtual LangAS	getGlobalVarAddressSpace (CodeGenModule &CGM, const VarDecl *D) const
	Get target favored AST address space of a global variable for languages other than OpenCL and CUDA.

virtual LangAS	getASTAllocaAddressSpace () const
	Get the AST address space for alloca.

Address	performAddrSpaceCast (CodeGen::CodeGenFunction &CGF, Address Addr, LangAS SrcAddr, LangAS DestAddr, llvm::Type *DestTy, bool IsNonNull=false) const

virtual llvm::Value *	performAddrSpaceCast (CodeGen::CodeGenFunction &CGF, llvm::Value V, LangAS SrcAddr, LangAS DestAddr, llvm::Type DestTy, bool IsNonNull=false) const
	Perform address space cast of an expression of pointer type.

virtual llvm::Constant *	performAddrSpaceCast (CodeGenModule &CGM, llvm::Constant V, LangAS SrcAddr, LangAS DestAddr, llvm::Type DestTy) const
	Perform address space cast of a constant expression of pointer type.

virtual LangAS	getAddrSpaceOfCxaAtexitPtrParam () const
	Get address space of pointer parameter for __cxa_atexit.

virtual llvm::SyncScope::ID	getLLVMSyncScopeID (const LangOptions &LangOpts, SyncScope Scope, llvm::AtomicOrdering Ordering, llvm::LLVMContext &Ctx) const
	Get the syncscope used in LLVM IR.

virtual TargetOpenCLBlockHelper *	getTargetOpenCLBlockHelper () const

virtual llvm::Value *	createEnqueuedBlockKernel (CodeGenFunction &CGF, llvm::Function BlockInvokeFunc, llvm::Type BlockTy) const
	Create an OpenCL kernel for an enqueued block.

virtual bool	shouldEmitStaticExternCAliases () const

virtual bool	shouldEmitDWARFBitFieldSeparators () const

virtual void	setCUDAKernelCallingConvention (const FunctionType *&FT) const

virtual llvm::Type *	getCUDADeviceBuiltinSurfaceDeviceType () const
	Return the device-side type for the CUDA device builtin surface type.

virtual llvm::Type *	getCUDADeviceBuiltinTextureDeviceType () const
	Return the device-side type for the CUDA device builtin texture type.

virtual llvm::Type *	getWasmExternrefReferenceType () const
	Return the WebAssembly externref reference type.

virtual llvm::Type *	getWasmFuncrefReferenceType () const
	Return the WebAssembly funcref reference type.

virtual bool	emitCUDADeviceBuiltinSurfaceDeviceCopy (CodeGenFunction &CGF, LValue Dst, LValue Src) const
	Emit the device-side copy of the builtin surface type.

virtual bool	emitCUDADeviceBuiltinTextureDeviceCopy (CodeGenFunction &CGF, LValue Dst, LValue Src) const
	Emit the device-side copy of the builtin texture type.

virtual llvm::Type *	getOpenCLType (CodeGenModule &CGM, const Type *T) const
	Return an LLVM type that corresponds to an OpenCL type.

Protected Member Functions
template<typename T >
const T &	getABIInfo () const

void	addStackProbeTargetAttributes (const Decl D, llvm::GlobalValue GV, CodeGen::CodeGenModule &CGM) const

Static Protected Member Functions
static std::string	qualifyWindowsLibrary (StringRef Lib)

Protected Attributes
std::unique_ptr< SwiftABIInfo >	SwiftInfo

Detailed Description

TargetCodeGenInfo - This class organizes various target-specific codegeneration issues, like target-specific attributes, builtins and so on.

Definition at line 46 of file TargetInfo.h.

Constructor & Destructor Documentation

◆ TargetCodeGenInfo()

TargetCodeGenInfo::TargetCodeGenInfo ( std::unique_ptr< ABIInfo > Info )

Definition at line 69 of file TargetInfo.cpp.

◆ ~TargetCodeGenInfo()

TargetCodeGenInfo::~TargetCodeGenInfo ( )

virtualdefault

Member Function Documentation

◆ addReturnRegisterOutputs()

virtual void clang::CodeGen::TargetCodeGenInfo::addReturnRegisterOutputs	(	CodeGen::CodeGenFunction &	CGF,
		CodeGen::LValue	ReturnValue,
		std::string &	Constraints,
		std::vector< llvm::Type * > &	ResultRegTypes,
		std::vector< llvm::Type * > &	ResultTruncRegTypes,
		std::vector< CodeGen::LValue > &	ResultRegDests,
		std::string &	AsmString,
		unsigned	NumOutputs
	)		const

inlinevirtual

Adds constraints and types for result registers.

Definition at line 184 of file TargetInfo.h.

◆ addStackProbeTargetAttributes()

void TargetCodeGenInfo::addStackProbeTargetAttributes	(	const Decl *	D,
		llvm::GlobalValue *	GV,
		CodeGen::CodeGenModule &	CGM
	)		const

protected

Definition at line 161 of file TargetInfo.cpp.

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

◆ adjustInlineAsmType()

virtual llvm::Type * clang::CodeGen::TargetCodeGenInfo::adjustInlineAsmType	(	CodeGen::CodeGenFunction &	CGF,
		StringRef	Constraint,
		llvm::Type *	Ty
	)		const

inlinevirtual

Corrects the low-level LLVM type for a given constraint and "usual" type.

Returns: A pointer to a new LLVM type, possibly the same as the original on success; 0 on failure.

Definition at line 170 of file TargetInfo.h.

◆ checkFunctionABI()

virtual void clang::CodeGen::TargetCodeGenInfo::checkFunctionABI	(	CodeGenModule &	CGM,
		const FunctionDecl *	Decl
	)		const

inlinevirtual

Any further codegen related checks that need to be done on a function signature in a target specific manner.

Definition at line 89 of file TargetInfo.h.

◆ checkFunctionCallABI()

virtual void clang::CodeGen::TargetCodeGenInfo::checkFunctionCallABI	(	CodeGenModule &	CGM,
		SourceLocation	CallLoc,
		const FunctionDecl *	Caller,
		const FunctionDecl *	Callee,
		const CallArgList &	Args
	)		const

inlinevirtual

Any further codegen related checks that need to be done on a function call in a target specific manner.

Definition at line 94 of file TargetInfo.h.

◆ createEnqueuedBlockKernel()

llvm::Value * TargetCodeGenInfo::createEnqueuedBlockKernel	(	CodeGenFunction &	CGF,
		llvm::Function *	Invoke,
		llvm::Type *	BlockTy
	)		const

virtual

Create an OpenCL kernel for an enqueued block.

The kernel function is a wrapper for the block invoke function with target-specific calling convention and ABI as an OpenCL kernel. The wrapper function accepts block context and block arguments in target-specific way and calls the original block invoke function.

The kernel has the same function type as the block invoke function. Its name is the name of the block invoke function postfixed with "_kernel". It simply calls the block invoke function then returns.

Definition at line 177 of file TargetInfo.cpp.

References clang::CodeGen::CodeGenModule::addDefaultFunctionDefinitionAttributes(), clang::CodeGen::CodeGenFunction::Builder, clang::C, clang::Call, clang::CC_OpenCLKernel, clang::CodeGen::CodeGenFunction::CGM, clang::CodeGen::CodeGenTypes::ClangCallConvToLLVMCallConv(), clang::CodeGen::CodeGenFunction::getLLVMContext(), clang::CodeGen::CodeGenModule::getModule(), and clang::CodeGen::CodeGenFunction::getTypes().

Referenced by clang::CodeGen::CGOpenCLRuntime::emitOpenCLEnqueuedBlock().

◆ decodeReturnAddress()

virtual llvm::Value * clang::CodeGen::TargetCodeGenInfo::decodeReturnAddress	(	CodeGen::CodeGenFunction &	CGF,
		llvm::Value *	Address
	)		const

inlinevirtual

Performs the code-generation required to convert a return address as stored by the system into the actual address of the next instruction that will be executed.

Used by __builtin_extract_return_addr().

Definition at line 140 of file TargetInfo.h.

◆ doesReturnSlotInterfereWithArgs()

virtual bool clang::CodeGen::TargetCodeGenInfo::doesReturnSlotInterfereWithArgs ( ) const

inlinevirtual

doesReturnSlotInterfereWithArgs - Return true if the target uses an argument slot for an 'sret' type.

Definition at line 193 of file TargetInfo.h.

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

◆ emitCUDADeviceBuiltinSurfaceDeviceCopy()

virtual bool clang::CodeGen::TargetCodeGenInfo::emitCUDADeviceBuiltinSurfaceDeviceCopy	(	CodeGenFunction &	CGF,
		LValue	Dst,
		LValue	Src
	)		const

inlinevirtual

Emit the device-side copy of the builtin surface type.

Definition at line 396 of file TargetInfo.h.

◆ emitCUDADeviceBuiltinTextureDeviceCopy()

virtual bool clang::CodeGen::TargetCodeGenInfo::emitCUDADeviceBuiltinTextureDeviceCopy	(	CodeGenFunction &	CGF,
		LValue	Dst,
		LValue	Src
	)		const

inlinevirtual

Emit the device-side copy of the builtin texture type.

Definition at line 403 of file TargetInfo.h.

◆ emitTargetGlobals()

virtual void clang::CodeGen::TargetCodeGenInfo::emitTargetGlobals ( CodeGen::CodeGenModule & CGM ) const

inlinevirtual

Provides a convenient hook to handle extra target-specific globals.

Definition at line 85 of file TargetInfo.h.

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

◆ emitTargetMetadata()

virtual void clang::CodeGen::TargetCodeGenInfo::emitTargetMetadata	(	CodeGen::CodeGenModule &	CGM,
		const llvm::MapVector< GlobalDecl, StringRef > &	MangledDeclNames
	)		const

inlinevirtual

emitTargetMetadata - Provides a convenient hook to handle extra target-specific metadata for the given globals.

Definition at line 80 of file TargetInfo.h.

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

◆ encodeReturnAddress()

virtual llvm::Value * clang::CodeGen::TargetCodeGenInfo::encodeReturnAddress	(	CodeGen::CodeGenFunction &	CGF,
		llvm::Value *	Address
	)		const

inlinevirtual

Performs the code-generation required to convert the address of an instruction into a return address suitable for storage by the system in a return slot.

Used by __builtin_frob_return_addr().

Definition at line 150 of file TargetInfo.h.

◆ extendPointerWithSExt()

virtual bool clang::CodeGen::TargetCodeGenInfo::extendPointerWithSExt ( ) const

inlinevirtual

Controls whether __builtin_extend_pointer should sign-extend pointers to uint64_t or zero-extend them (the default).

Has no effect for targets:

that have 64-bit pointers, or
that cannot address through registers larger than pointers, or
that implicitly ignore/truncate the top bits when addressing through such registers.

Definition at line 116 of file TargetInfo.h.

◆ getABIInfo() [1/2]

template<typename T >

const T & clang::CodeGen::TargetCodeGenInfo::getABIInfo ( ) const

inlineprotected

Definition at line 56 of file TargetInfo.h.

References clang::T.

Referenced by clang::CodeGen::CodeGenModule::CodeGenModule(), getMangledNameImpl(), WebAssemblyTargetCodeGenInfo::getWasmExternrefReferenceType(), and WebAssemblyTargetCodeGenInfo::getWasmFuncrefReferenceType().

◆ getABIInfo() [2/2]

const ABIInfo & clang::CodeGen::TargetCodeGenInfo::getABIInfo ( ) const

inline

getABIInfo() - Returns ABI info helper for the target.

Definition at line 65 of file TargetInfo.h.

◆ getAddrSpaceOfCxaAtexitPtrParam()

virtual LangAS clang::CodeGen::TargetCodeGenInfo::getAddrSpaceOfCxaAtexitPtrParam ( ) const

inlinevirtual

Get address space of pointer parameter for __cxa_atexit.

Definition at line 325 of file TargetInfo.h.

References clang::Default.

Referenced by EmitDeclDestroy().

◆ getARCRetainAutoreleasedReturnValueMarker()

virtual StringRef clang::CodeGen::TargetCodeGenInfo::getARCRetainAutoreleasedReturnValueMarker ( ) const

inlinevirtual

Retrieve the address of a function to call immediately before calling objc_retainAutoreleasedReturnValue.

The implementation of objc_autoreleaseReturnValue sniffs the instruction stream following its return address to decide whether it's a call to objc_retainAutoreleasedReturnValue. This can be prohibitively expensive, depending on the relocation model, and so on some targets it instead sniffs for a particular instruction sequence. This functions returns that instruction sequence in inline assembly, which will be empty if none is required.

Definition at line 205 of file TargetInfo.h.

Referenced by emitAutoreleasedReturnValueMarker().

◆ getASTAllocaAddressSpace()

virtual LangAS clang::CodeGen::TargetCodeGenInfo::getASTAllocaAddressSpace ( ) const

inlinevirtual

Get the AST address space for alloca.

Definition at line 296 of file TargetInfo.h.

References clang::Default.

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

◆ getCUDADeviceBuiltinSurfaceDeviceType()

virtual llvm::Type * clang::CodeGen::TargetCodeGenInfo::getCUDADeviceBuiltinSurfaceDeviceType ( ) const

inlinevirtual

Return the device-side type for the CUDA device builtin surface type.

Definition at line 379 of file TargetInfo.h.

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

◆ getCUDADeviceBuiltinTextureDeviceType()

virtual llvm::Type * clang::CodeGen::TargetCodeGenInfo::getCUDADeviceBuiltinTextureDeviceType ( ) const

inlinevirtual

Return the device-side type for the CUDA device builtin texture type.

Definition at line 384 of file TargetInfo.h.

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

◆ getDependentLibraryOption()

void TargetCodeGenInfo::getDependentLibraryOption	(	llvm::StringRef	Lib,
		llvm::SmallString< 24 > &	Opt
	)		const

virtual

Gets the linker options necessary to link a dependent library on this platform.

Definition at line 96 of file TargetInfo.cpp.

Referenced by clang::CodeGen::CodeGenModule::AddDependentLib(), and addLinkOptionsPostorder().

◆ getDetectMismatchOption()

virtual void clang::CodeGen::TargetCodeGenInfo::getDetectMismatchOption	(	llvm::StringRef	Name,
		llvm::StringRef	Value,
		llvm::SmallString< 32 > &	Opt
	)		const

inlinevirtual

Gets the linker options necessary to detect object file mismatches on this platform.

Definition at line 273 of file TargetInfo.h.

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

◆ getDwarfEHStackPointer()

virtual int clang::CodeGen::TargetCodeGenInfo::getDwarfEHStackPointer ( CodeGen::CodeGenModule & M ) const

inlinevirtual

Determines the DWARF register number for the stack pointer, for exception-handling purposes.

Implements __builtin_dwarf_sp_column.

Returns -1 if the operation is unsupported by this target.

Definition at line 122 of file TargetInfo.h.

◆ getGlobalVarAddressSpace()

LangAS TargetCodeGenInfo::getGlobalVarAddressSpace	(	CodeGenModule &	CGM,
		const VarDecl *	D
	)		const

virtual

Get target favored AST address space of a global variable for languages other than OpenCL and CUDA.

If D is nullptr, returns the default target favored address space for global variable.

Definition at line 124 of file TargetInfo.cpp.

References clang::Default, clang::QualType::getAddressSpace(), clang::CodeGen::CodeGenModule::getLangOpts(), and clang::ValueDecl::getType().

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

◆ getLLVMSyncScopeID()

llvm::SyncScope::ID TargetCodeGenInfo::getLLVMSyncScopeID	(	const LangOptions &	LangOpts,
		SyncScope	Scope,
		llvm::AtomicOrdering	Ordering,
		llvm::LLVMContext &	Ctx
	)		const

virtual

Get the syncscope used in LLVM IR.

Definition at line 154 of file TargetInfo.cpp.

Referenced by EmitAtomicOp().

◆ getNullPointer()

llvm::Constant * TargetCodeGenInfo::getNullPointer	(	const CodeGen::CodeGenModule &	CGM,
		llvm::PointerType *	T,
		QualType	QT
	)		const

virtual

Get target specific null pointer.

Parameters

T	is the LLVM type of the null pointer.
QT	is the clang QualType of the null pointer.

Returns: ConstantPointerNull with the given type T. Each target can override it to return its own desired constant value.

Definition at line 119 of file TargetInfo.cpp.

References clang::T.

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

◆ getOpenCLKernelCallingConv()

unsigned TargetCodeGenInfo::getOpenCLKernelCallingConv ( ) const

virtual

Get LLVM calling convention for OpenCL kernel.

Definition at line 105 of file TargetInfo.cpp.

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

◆ getOpenCLType()

virtual llvm::Type * clang::CodeGen::TargetCodeGenInfo::getOpenCLType	(	CodeGenModule &	CGM,
		const Type *	T
	)		const

inlinevirtual

Return an LLVM type that corresponds to an OpenCL type.

Definition at line 411 of file TargetInfo.h.

Referenced by clang::CodeGen::CGOpenCLRuntime::convertOpenCLSpecificType(), clang::CodeGen::CGOpenCLRuntime::getPipeType(), and clang::CodeGen::CGOpenCLRuntime::getSamplerType().

◆ getSizeOfUnwindException()

unsigned TargetCodeGenInfo::getSizeOfUnwindException ( ) const

virtual

Determines the size of struct _Unwind_Exception on this platform, in 8-bit units.

The Itanium ABI defines this as: struct _Unwind_Exception { uint64 exception_class; _Unwind_Exception_Cleanup_Fn exception_cleanup; uint64 private_1; uint64 private_2; };

Definition at line 76 of file TargetInfo.cpp.

Referenced by InitCatchParam().

◆ getSwiftABIInfo()

const SwiftABIInfo & clang::CodeGen::TargetCodeGenInfo::getSwiftABIInfo ( ) const

inline

Returns Swift ABI info helper for the target.

Definition at line 68 of file TargetInfo.h.

References SwiftInfo.

Referenced by getSwiftABIInfo().

◆ getTargetOpenCLBlockHelper()

virtual TargetOpenCLBlockHelper * clang::CodeGen::TargetCodeGenInfo::getTargetOpenCLBlockHelper ( ) const

inlinevirtual

Definition at line 352 of file TargetInfo.h.

Referenced by buildGlobalBlock(), computeBlockInfo(), clang::CodeGen::CodeGenModule::getGenericBlockLiteralType(), and initializeForBlockHeader().

◆ getUBSanFunctionSignature()

virtual llvm::Constant * clang::CodeGen::TargetCodeGenInfo::getUBSanFunctionSignature ( CodeGen::CodeGenModule & CGM ) const

inlinevirtual

Return a constant used by UBSan as a signature to identify functions possessing type information, or 0 if the platform is unsupported.

This magic number is invalid instruction encoding in many targets.

Definition at line 217 of file TargetInfo.h.

References clang::CodeGen::CodeGenTypeCache::Int32Ty.

Referenced by getPrologueSignature().

◆ getWasmExternrefReferenceType()

virtual llvm::Type * clang::CodeGen::TargetCodeGenInfo::getWasmExternrefReferenceType ( ) const

inlinevirtual

Return the WebAssembly externref reference type.

Reimplemented in WebAssemblyTargetCodeGenInfo.

Definition at line 390 of file TargetInfo.h.

◆ getWasmFuncrefReferenceType()

virtual llvm::Type * clang::CodeGen::TargetCodeGenInfo::getWasmFuncrefReferenceType ( ) const

inlinevirtual

Return the WebAssembly funcref reference type.

Reimplemented in WebAssemblyTargetCodeGenInfo.

Definition at line 393 of file TargetInfo.h.

◆ initDwarfEHRegSizeTable()

virtual bool clang::CodeGen::TargetCodeGenInfo::initDwarfEHRegSizeTable	(	CodeGen::CodeGenFunction &	CGF,
		llvm::Value *	Address
	)		const

inlinevirtual

Initializes the given DWARF EH register-size table, a char*.

Implements __builtin_init_dwarf_reg_size_table.

Returns true if the operation is unsupported by this target.

Definition at line 130 of file TargetInfo.h.

◆ isNoProtoCallVariadic()

bool TargetCodeGenInfo::isNoProtoCallVariadic	(	const CodeGen::CallArgList &	args,
		const FunctionNoProtoType *	fnType
	)		const

virtual

Determine whether a call to an unprototyped functions under the given calling convention should use the variadic convention or the non-variadic convention.

There's a good reason to make a platform's variadic calling convention be different from its non-variadic calling convention: the non-variadic arguments can be passed in registers (better for performance), and the variadic arguments can be passed on the stack (also better for performance). If this is done, however, unprototyped functions must use the non-variadic convention, because C99 states that a call through an unprototyped function type must succeed if the function was defined with a non-variadic prototype with compatible parameters. Therefore, splitting the conventions makes it impossible to call a variadic function through an unprototyped type. Since function prototypes came out in the late 1970s, this is probably an acceptable trade-off. Nonetheless, not all platforms are willing to make it, and in particularly x86-64 bends over backwards to make the conventions compatible.

The default is false. This is correct whenever:

the conventions are exactly the same, because it does not matter and the resulting IR will be somewhat prettier in certain cases; or
the conventions are substantively different in how they pass arguments, because in this case using the variadic convention will lead to C99 violations.

However, some platforms make the conventions identical except for passing additional out-of-band information to a variadic function: for example, x86-64 passes the number of SSE arguments in al. On these platforms, it is desirable to call unprototyped functions using the variadic convention so that unprototyped calls to varargs functions still succeed.

Relatedly, platforms which pass the fixed arguments to this: A foo(B, C, D); differently than they would pass them to this: A foo(B, C, D, ...); may need to adjust the debugger-support code in Sema to do the right thing when calling a function with no know signature.

Definition at line 86 of file TargetInfo.cpp.

Referenced by arrangeFreeFunctionLikeCall().

◆ isScalarizableAsmOperand()

virtual bool clang::CodeGen::TargetCodeGenInfo::isScalarizableAsmOperand	(	CodeGen::CodeGenFunction &	CGF,
		llvm::Type *	Ty
	)		const

inlinevirtual

Target hook to decide whether an inline asm operand can be passed by value.

Definition at line 178 of file TargetInfo.h.

Referenced by EmitAsmStores().

◆ markARCOptimizedReturnCallsAsNoTail()

virtual bool clang::CodeGen::TargetCodeGenInfo::markARCOptimizedReturnCallsAsNoTail ( ) const

inlinevirtual

Determine whether a call to objc_retainAutoreleasedReturnValue or objc_unsafeClaimAutoreleasedReturnValue should be marked as 'notail'.

Definition at line 211 of file TargetInfo.h.

Referenced by emitOptimizedARCReturnCall().

◆ performAddrSpaceCast() [1/3]

Address clang::CodeGen::TargetCodeGenInfo::performAddrSpaceCast	(	CodeGen::CodeGenFunction &	CGF,
		Address	Addr,
		LangAS	SrcAddr,
		LangAS	DestAddr,
		llvm::Type *	DestTy,
		bool	IsNonNull = `false`
	)		const

Referenced by castStringLiteralToDefaultAddressSpace(), emitCatchDispatchBlock(), clang::CodeGen::CodeGenModule::GetAddrOfGlobalTemporary(), clang::CodeGen::CodeGenModule::GetOrCreateLLVMGlobal(), clang::CodeGen::CodeGenModule::getOrCreateStaticVarDecl(), and performAddrSpaceCast().

◆ performAddrSpaceCast() [2/3]

llvm::Value * TargetCodeGenInfo::performAddrSpaceCast	(	CodeGen::CodeGenFunction &	CGF,
		llvm::Value *	V,
		LangAS	SrcAddr,
		LangAS	DestAddr,
		llvm::Type *	DestTy,
		bool	IsNonNull = `false`
	)		const

virtual

Perform address space cast of an expression of pointer type.

Parameters

V	is the LLVM value to be casted to another address space.
SrcAddr	is the language address space of `V`.
DestAddr	is the targeted language address space.
DestTy	is the destination LLVM pointer type.
IsNonNull	is the flag indicating `V` is known to be non null.

Definition at line 132 of file TargetInfo.cpp.

References clang::CodeGen::CodeGenFunction::Builder, clang::C, clang::CodeGen::CodeGenFunction::CGM, clang::CodeGen::CGBuilderTy::CreateAddrSpaceCast(), and performAddrSpaceCast().

◆ performAddrSpaceCast() [3/3]

llvm::Constant * TargetCodeGenInfo::performAddrSpaceCast	(	CodeGenModule &	CGM,
		llvm::Constant *	V,
		LangAS	SrcAddr,
		LangAS	DestAddr,
		llvm::Type *	DestTy
	)		const

virtual

Perform address space cast of a constant expression of pointer type.

Parameters

V	is the LLVM constant to be casted to another address space.
SrcAddr	is the language address space of `V`.
DestAddr	is the targeted language address space.
DestTy	is the destination LLVM pointer type.

Definition at line 145 of file TargetInfo.cpp.

◆ qualifyWindowsLibrary()

std::string TargetCodeGenInfo::qualifyWindowsLibrary ( StringRef Lib )

staticprotected

Definition at line 1605 of file X86.cpp.

◆ setCUDAKernelCallingConvention()

virtual void clang::CodeGen::TargetCodeGenInfo::setCUDAKernelCallingConvention ( const FunctionType *& FT ) const

inlinevirtual

Definition at line 376 of file TargetInfo.h.

Referenced by setCUDAKernelCallingConvention().

◆ setTargetAttributes()

virtual void clang::CodeGen::TargetCodeGenInfo::setTargetAttributes	(	const Decl *	D,
		llvm::GlobalValue *	GV,
		CodeGen::CodeGenModule &	M
	)		const

inlinevirtual

setTargetAttributes - Provides a convenient hook to handle extra target-specific attributes for the given global.

Reimplemented in WebAssemblyTargetCodeGenInfo.

Definition at line 75 of file TargetInfo.h.

Referenced by clang::CodeGen::CGOpenMPRuntime::emitTargetOutlinedFunctionHelper(), clang::CodeGen::CodeGenModule::GetOrCreateLLVMGlobal(), clang::CodeGen::CodeGenModule::getOrCreateStaticVarDecl(), and WebAssemblyTargetCodeGenInfo::setTargetAttributes().

◆ shouldEmitDWARFBitFieldSeparators()

virtual bool clang::CodeGen::TargetCodeGenInfo::shouldEmitDWARFBitFieldSeparators ( ) const

inlinevirtual

Returns: true if annonymous zero-sized bitfields should be emitted to correctly distinguish between struct types whose memory layout is the same, but whose layout may differ when used as argument passed by value

Definition at line 374 of file TargetInfo.h.

◆ shouldEmitStaticExternCAliases()

virtual bool clang::CodeGen::TargetCodeGenInfo::shouldEmitStaticExternCAliases ( ) const

inlinevirtual

Returns: true if the target supports alias from the unmangled name to the mangled name of functions declared within an extern "C" region and marked as 'used', and having internal linkage.

Definition at line 369 of file TargetInfo.h.

◆ testFPKind()

virtual llvm::Value * clang::CodeGen::TargetCodeGenInfo::testFPKind	(	llvm::Value *	V,
		unsigned	BuiltinID,
		CGBuilderTy &	Builder,
		CodeGenModule &	CGM
	)		const

inlinevirtual

Performs a target specific test of a floating point value for things like IsNaN, Infinity, ... Nullptr is returned if no implementation exists.

Definition at line 159 of file TargetInfo.h.

References V.

Referenced by tryUseTestFPKind().

Member Data Documentation

◆ SwiftInfo

std::unique_ptr<SwiftABIInfo> clang::CodeGen::TargetCodeGenInfo::SwiftInfo

protected

Definition at line 53 of file TargetInfo.h.

Referenced by getSwiftABIInfo(), and WebAssemblyTargetCodeGenInfo::WebAssemblyTargetCodeGenInfo().

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

lib/CodeGen/TargetInfo.h
lib/CodeGen/TargetInfo.cpp
lib/CodeGen/Targets/X86.cpp

Classes

Public Member Functions

Protected Member Functions

Static Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ TargetCodeGenInfo()

◆ ~TargetCodeGenInfo()

Member Function Documentation

◆ addReturnRegisterOutputs()

◆ addStackProbeTargetAttributes()

◆ adjustInlineAsmType()

◆ checkFunctionABI()

◆ checkFunctionCallABI()

◆ createEnqueuedBlockKernel()

◆ decodeReturnAddress()

◆ doesReturnSlotInterfereWithArgs()

◆ emitCUDADeviceBuiltinSurfaceDeviceCopy()

◆ emitCUDADeviceBuiltinTextureDeviceCopy()

◆ emitTargetGlobals()

◆ emitTargetMetadata()

◆ encodeReturnAddress()

◆ extendPointerWithSExt()

◆ getABIInfo() [1/2]

◆ getABIInfo() [2/2]

◆ getAddrSpaceOfCxaAtexitPtrParam()

◆ getARCRetainAutoreleasedReturnValueMarker()

◆ getASTAllocaAddressSpace()

◆ getCUDADeviceBuiltinSurfaceDeviceType()

◆ getCUDADeviceBuiltinTextureDeviceType()

◆ getDependentLibraryOption()

◆ getDetectMismatchOption()

◆ getDwarfEHStackPointer()

◆ getGlobalVarAddressSpace()

◆ getLLVMSyncScopeID()

◆ getNullPointer()

◆ getOpenCLKernelCallingConv()

◆ getOpenCLType()

◆ getSizeOfUnwindException()

◆ getSwiftABIInfo()

◆ getTargetOpenCLBlockHelper()

◆ getUBSanFunctionSignature()

◆ getWasmExternrefReferenceType()

◆ getWasmFuncrefReferenceType()

◆ initDwarfEHRegSizeTable()

◆ isNoProtoCallVariadic()

◆ isScalarizableAsmOperand()

◆ markARCOptimizedReturnCallsAsNoTail()

◆ performAddrSpaceCast() [1/3]

◆ performAddrSpaceCast() [2/3]

◆ performAddrSpaceCast() [3/3]

◆ qualifyWindowsLibrary()

◆ setCUDAKernelCallingConvention()

◆ setTargetAttributes()

◆ shouldEmitDWARFBitFieldSeparators()

◆ shouldEmitStaticExternCAliases()

◆ testFPKind()

Member Data Documentation

◆ SwiftInfo