Base class for ValueHandlers used for arguments coming into the current function, or for return values received from a call. More...

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

Inheritance diagram for llvm::CallLowering::IncomingValueHandler:

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Public Member Functions
	IncomingValueHandler (MachineIRBuilder &MIRBuilder, MachineRegisterInfo &MRI)

Register	buildExtensionHint (const CCValAssign &VA, Register SrcReg, LLT NarrowTy)
	Insert G_ASSERT_ZEXT/G_ASSERT_SEXT or other hint instruction based on `VA`, returning the new register if a hint was inserted.

void	assignValueToReg (Register ValVReg, Register PhysReg, const CCValAssign &VA) override
	Provides a default implementation for argument handling.

Public Member Functions inherited from llvm::CallLowering::ValueHandler
	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.

Additional Inherited Members
Public Attributes inherited from llvm::CallLowering::ValueHandler
MachineIRBuilder &	MIRBuilder

MachineRegisterInfo &	MRI

const bool	IsIncomingArgumentHandler

Detailed Description

Base class for ValueHandlers used for arguments coming into the current function, or for return values received from a call.

Definition at line 331 of file CallLowering.h.

Constructor & Destructor Documentation

◆ IncomingValueHandler()

llvm::CallLowering::IncomingValueHandler::IncomingValueHandler	(	MachineIRBuilder &	MIRBuilder,
		MachineRegisterInfo &	MRI
	)

inline

Definition at line 332 of file CallLowering.h.

Member Function Documentation

◆ assignValueToReg()

void CallLowering::IncomingValueHandler::assignValueToReg	(	Register	ValVReg,
		Register	PhysReg,
		const CCValAssign &	VA
	)

overridevirtual

Provides a default implementation for argument handling.

Implements llvm::CallLowering::ValueHandler.

Definition at line 1383 of file CallLowering.cpp.

References llvm::MachineIRBuilder::buildCopy(), llvm::MachineIRBuilder::buildTrunc(), llvm::CCValAssign::getLocVT(), isCopyCompatibleType(), and MRI.

◆ buildExtensionHint()

Register CallLowering::IncomingValueHandler::buildExtensionHint	(	const CCValAssign &	VA,
		Register	SrcReg,
		LLT	NarrowTy
	)

Insert G_ASSERT_ZEXT/G_ASSERT_SEXT or other hint instruction based on VA, returning the new register if a hint was inserted.

Definition at line 1342 of file CallLowering.cpp.

References llvm::MachineIRBuilder::buildAssertSExt(), llvm::MachineIRBuilder::buildAssertZExt(), llvm::CCValAssign::getLocInfo(), llvm::MachineInstrBuilder::getReg(), llvm::LLT::getScalarSizeInBits(), MRI, llvm::CCValAssign::SExt, and llvm::CCValAssign::ZExt.

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

include/llvm/CodeGen/GlobalISel/CallLowering.h
lib/CodeGen/GlobalISel/CallLowering.cpp