#include "llvm/CodeGen/GlobalISel/CallLowering.h"

Inheritance diagram for llvm::CallLowering::ValueHandler:

Public Member Functions
	ValueHandler (bool IsIncoming, MachineIRBuilder &MIRBuilder, MachineRegisterInfo &MRI)
virtual	~ValueHandler ()=default
bool	isIncomingArgumentHandler () const
	Returns true if the handler is dealing with incoming arguments, i.e.
virtual Register	getStackAddress (uint64_t MemSize, int64_t Offset, MachinePointerInfo &MPO, ISD::ArgFlagsTy Flags)=0
	Materialize a VReg containing the address of the specified stack-based object.
virtual LLT	getStackValueStoreType (const DataLayout &DL, const CCValAssign &VA, ISD::ArgFlagsTy Flags) const
	Return the in-memory size to write for the argument at `VA`.
virtual void	assignValueToReg (Register ValVReg, Register PhysReg, const CCValAssign &VA)=0
	The specified value has been assigned to a physical register, handle the appropriate COPY (either to or from) and mark any relevant uses/defines as needed.
virtual void	assignValueToAddress (Register ValVReg, Register Addr, LLT MemTy, const MachinePointerInfo &MPO, const CCValAssign &VA)=0
	The specified value has been assigned to a stack location.
virtual void	assignValueToAddress (const ArgInfo &Arg, unsigned ValRegIndex, Register Addr, LLT MemTy, const MachinePointerInfo &MPO, const CCValAssign &VA)
	An overload which takes an ArgInfo if additional information about the arg is needed.
virtual unsigned	assignCustomValue (ArgInfo &Arg, ArrayRef< CCValAssign > VAs, std::function< void()> *Thunk=nullptr)
	Handle custom values, which may be passed into one or more of `VAs`.
void	copyArgumentMemory (const ArgInfo &Arg, Register DstPtr, Register SrcPtr, const MachinePointerInfo &DstPtrInfo, Align DstAlign, const MachinePointerInfo &SrcPtrInfo, Align SrcAlign, uint64_t MemSize, CCValAssign &VA) const
	Do a memory copy of `MemSize` bytes from `SrcPtr` to `DstPtr`.
Register	extendRegister (Register ValReg, const CCValAssign &VA, unsigned MaxSizeBits=0)
	Extend a register to the location type given in VA, capped at extending to at most MaxSize bits.

Public Attributes
MachineIRBuilder &	MIRBuilder
MachineRegisterInfo &	MRI
const bool	IsIncomingArgumentHandler

Detailed Description

Definition at line 240 of file CallLowering.h.

Constructor & Destructor Documentation

◆ ValueHandler()

llvm::CallLowering::ValueHandler::ValueHandler	(	bool	IsIncoming,
		MachineIRBuilder &	MIRBuilder,
		MachineRegisterInfo &	MRI )

inline

Definition at line 245 of file CallLowering.h.

References IsIncomingArgumentHandler, MIRBuilder, and MRI.

Referenced by llvm::CallLowering::IncomingValueHandler::IncomingValueHandler(), and llvm::CallLowering::OutgoingValueHandler::OutgoingValueHandler().

◆ ~ValueHandler()

virtual llvm::CallLowering::ValueHandler::~ValueHandler ( )

virtualdefault

Member Function Documentation

◆ assignCustomValue()

virtual unsigned llvm::CallLowering::ValueHandler::assignCustomValue	(	ArgInfo &	Arg,
		ArrayRef< CCValAssign >	VAs,
		std::function< void()> *	Thunk = nullptr )

inlinevirtual

Handle custom values, which may be passed into one or more of VAs.

If the handler wants the assignments to be delayed until after mem loc assignments, then it sets Thunk to the thunk to do the assignment.

Returns: The number of VAs that have been assigned including the first one, and which should therefore be skipped from further processing.

Definition at line 306 of file CallLowering.h.

References llvm_unreachable.

Referenced by llvm::CallLowering::handleAssignments().

◆ assignValueToAddress() [1/2]

virtual void llvm::CallLowering::ValueHandler::assignValueToAddress	(	const ArgInfo &	Arg,
		unsigned	ValRegIndex,
		Register	Addr,
		LLT	MemTy,
		const MachinePointerInfo &	MPO,
		const CCValAssign &	VA )

inlinevirtual

An overload which takes an ArgInfo if additional information about the arg is needed.

ValRegIndex is the index in Arg.Regs for the value to store.

Definition at line 292 of file CallLowering.h.

References assignValueToAddress(), and llvm::CallLowering::ArgInfo::Regs.

◆ assignValueToAddress() [2/2]

virtual void llvm::CallLowering::ValueHandler::assignValueToAddress	(	Register	ValVReg,
		Register	Addr,
		LLT	MemTy,
		const MachinePointerInfo &	MPO,
		const CCValAssign &	VA )

pure virtual

The specified value has been assigned to a stack location.

Load or store it there, with appropriate extension if necessary.

Implemented in M68kOutgoingArgHandler.

Referenced by assignValueToAddress(), and llvm::CallLowering::handleAssignments().

◆ assignValueToReg()

virtual void llvm::CallLowering::ValueHandler::assignValueToReg	(	Register	ValVReg,
		Register	PhysReg,
		const CCValAssign &	VA )

pure virtual

The specified value has been assigned to a physical register, handle the appropriate COPY (either to or from) and mark any relevant uses/defines as needed.

Implemented in llvm::CallLowering::IncomingValueHandler, and M68kOutgoingArgHandler.

Referenced by llvm::CallLowering::handleAssignments().

◆ copyArgumentMemory()

void CallLowering::ValueHandler::copyArgumentMemory	(	const ArgInfo &	Arg,
		Register	DstPtr,
		Register	SrcPtr,
		const MachinePointerInfo &	DstPtrInfo,
		Align	DstAlign,
		const MachinePointerInfo &	SrcPtrInfo,
		Align	SrcAlign,
		uint64_t	MemSize,
		CCValAssign &	VA ) const

Do a memory copy of MemSize bytes from SrcPtr to DstPtr.

This is necessary for outgoing stack-passed byval arguments.

Definition at line 1271 of file CallLowering.cpp.

References llvm::MachineFunction::getMachineMemOperand(), llvm::LLT::getSizeInBits(), MIRBuilder, llvm::MachineMemOperand::MODereferenceable, llvm::MachineMemOperand::MOLoad, llvm::MachineMemOperand::MOStore, MRI, and llvm::LLT::scalar().

Referenced by llvm::CallLowering::handleAssignments().

◆ extendRegister()

Register CallLowering::ValueHandler::extendRegister	(	Register	ValReg,
		const CCValAssign &	VA,
		unsigned	MaxSizeBits = 0 )

Extend a register to the location type given in VA, capped at extending to at most MaxSize bits.

If MaxSizeBits is 0 then no maximum is set.

Definition at line 1294 of file CallLowering.cpp.

References llvm::CCValAssign::AExt, llvm::CCValAssign::BCvt, llvm::CCValAssign::Full, llvm::CCValAssign::getLocInfo(), llvm::CCValAssign::getLocVT(), llvm::LLT::getSizeInBits(), llvm::CCValAssign::getValVT(), llvm::LLT::isPointer(), llvm::LLT::isScalar(), llvm_unreachable, MIRBuilder, MRI, llvm::LLT::scalar(), llvm::CCValAssign::SExt, and llvm::CCValAssign::ZExt.

Referenced by M68kOutgoingArgHandler::assignValueToAddress(), and M68kOutgoingArgHandler::assignValueToReg().

◆ getStackAddress()

virtual Register llvm::CallLowering::ValueHandler::getStackAddress	(	uint64_t	MemSize,
		int64_t	Offset,
		MachinePointerInfo &	MPO,
		ISD::ArgFlagsTy	Flags )

pure virtual

Materialize a VReg containing the address of the specified stack-based object.

This is either based on a FrameIndex or direct SP manipulation, depending on the context. MPO should be initialized to an appropriate description of the address created.

Implemented in M68kOutgoingArgHandler.

References DL, getStackValueStoreType(), and llvm::Offset.

Referenced by llvm::CallLowering::handleAssignments().