Target specific hooks for defining how a type should be passed or returned from functions with one of the Swift calling conventions. More...

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

Public Member Functions
	SwiftABIInfo (CodeGen::CodeGenTypes &CGT, bool SwiftErrorInRegister)

virtual	~SwiftABIInfo ()

virtual bool	shouldPassIndirectly (ArrayRef< llvm::Type * > ComponentTys, bool AsReturnValue) const
	Returns true if an aggregate which expands to the given type sequence should be passed / returned indirectly.

virtual bool	isLegalVectorType (CharUnits VectorSize, llvm::Type *EltTy, unsigned NumElts) const
	Returns true if the given vector type is legal from Swift's calling convention perspective.

bool	isSwiftErrorInRegister () const
	Returns true if swifterror is lowered to a register by the target ABI.

Protected Member Functions
bool	occupiesMoreThan (ArrayRef< llvm::Type * > scalarTypes, unsigned maxAllRegisters) const
	Does the given lowering require more than the given number of registers when expanded?

Protected Attributes
CodeGenTypes &	CGT

bool	SwiftErrorInRegister

Detailed Description

Target specific hooks for defining how a type should be passed or returned from functions with one of the Swift calling conventions.

Definition at line 128 of file ABIInfo.h.

Constructor & Destructor Documentation

◆ SwiftABIInfo()

clang::CodeGen::SwiftABIInfo::SwiftABIInfo	(	CodeGen::CodeGenTypes &	CGT,
		bool	SwiftErrorInRegister
	)

inline

Definition at line 137 of file ABIInfo.h.

◆ ~SwiftABIInfo()

SwiftABIInfo::~SwiftABIInfo ( )

virtualdefault

Member Function Documentation

◆ isLegalVectorType()

bool SwiftABIInfo::isLegalVectorType	(	CharUnits	VectorSize,
		llvm::Type *	EltTy,
		unsigned	NumElts
	)		const

virtual

Returns true if the given vector type is legal from Swift's calling convention perspective.

Definition at line 278 of file ABIInfo.cpp.

References clang::CharUnits::getQuantity().

Referenced by clang::CodeGen::swiftcall::isLegalVectorType().

◆ isSwiftErrorInRegister()

bool clang::CodeGen::SwiftABIInfo::isSwiftErrorInRegister ( ) const

inline

Returns true if swifterror is lowered to a register by the target ABI.

Definition at line 153 of file ABIInfo.h.

References SwiftErrorInRegister.

Referenced by clang::CodeGen::swiftcall::isSwiftErrorLoweredInRegister().

◆ occupiesMoreThan()

bool SwiftABIInfo::occupiesMoreThan	(	ArrayRef< llvm::Type * >	scalarTypes,
		unsigned	maxAllRegisters
	)		const

protected

Does the given lowering require more than the given number of registers when expanded?

This is intended to be the basis of a reasonable basic implementation of should{Pass,Return}Indirectly.

For most targets, a limit of four total registers is reasonable; this limits the amount of code required in order to move around the value in case it wasn't produced immediately prior to the call by the caller (or wasn't produced in exactly the right registers) or isn't used immediately within the callee. But some targets may need to further limit the register count due to an inability to support that many return registers.

Definition at line 255 of file ABIInfo.cpp.

References CGT, clang::Default, clang::TargetInfo::getPointerWidth(), clang::CodeGen::CodeGenTypes::getTarget(), and clang::ast_matchers::type.

Referenced by shouldPassIndirectly().