Argument handling is mostly uniform between the four places that make these decisions: function formal arguments, call instruction args, call instruction returns and function returns. More...

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

Collaboration diagram for llvm::CallLowering::ValueHandler:

[legend]

Public Member Functions
	ValueHandler (MachineIRBuilder &MIRBuilder, MachineRegisterInfo &MRI, CCAssignFn *AssignFn)

virtual	~ValueHandler ()=default

virtual unsigned	getStackAddress (uint64_t Size, int64_t Offset, MachinePointerInfo &MPO)=0
	Materialize a VReg containing the address of the specified stack-based object. More...

virtual void	assignValueToReg (unsigned ValVReg, unsigned PhysReg, 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. More...

virtual void	assignValueToAddress (unsigned ValVReg, unsigned Addr, uint64_t Size, MachinePointerInfo &MPO, CCValAssign &VA)=0
	The specified value has been assigned to a stack location. More...

virtual unsigned	assignCustomValue (const ArgInfo &Arg, ArrayRef< CCValAssign > VAs)
	Handle custom values, which may be passed into one or more of `VAs`. More...

unsigned	extendRegister (unsigned ValReg, CCValAssign &VA)

virtual bool	assignArg (unsigned ValNo, MVT ValVT, MVT LocVT, CCValAssign::LocInfo LocInfo, const ArgInfo &Info, CCState &State)

Public Attributes
MachineIRBuilder &	MIRBuilder

MachineRegisterInfo &	MRI

CCAssignFn *	AssignFn

Detailed Description

Argument handling is mostly uniform between the four places that make these decisions: function formal arguments, call instruction args, call instruction returns and function returns.

However, once a decision has been made on where an arugment should go, exactly what happens can vary slightly. This class abstracts the differences.

Definition at line 62 of file CallLowering.h.

Constructor & Destructor Documentation

◆ ValueHandler()

llvm::CallLowering::ValueHandler::ValueHandler	(	MachineIRBuilder &	MIRBuilder,
		MachineRegisterInfo &	MRI,
		CCAssignFn *	AssignFn
	)

inline

Definition at line 63 of file CallLowering.h.

References Size.

◆ ~ValueHandler()

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

virtualdefault

Member Function Documentation

◆ assignArg()

virtual bool llvm::CallLowering::ValueHandler::assignArg	(	unsigned	ValNo,
		MVT	ValVT,
		MVT	LocVT,
		CCValAssign::LocInfo	LocInfo,
		const ArgInfo &	Info,
		CCState &	State
	)

inlinevirtual

Definition at line 103 of file CallLowering.h.

References llvm::CallLowering::ArgInfo::Flags.

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

◆ assignCustomValue()

virtual unsigned llvm::CallLowering::ValueHandler::assignCustomValue	(	const ArgInfo &	Arg,
		ArrayRef< CCValAssign >	VAs
	)

inlinevirtual

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

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

Definition at line 94 of file CallLowering.h.

References llvm_unreachable.

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

◆ assignValueToAddress()

virtual void llvm::CallLowering::ValueHandler::assignValueToAddress	(	unsigned	ValVReg,
		unsigned	Addr,
		uint64_t	Size,
		MachinePointerInfo &	MPO,
		CCValAssign &	VA
	)

pure virtual

The specified value has been assigned to a stack location.

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

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

◆ assignValueToReg()

virtual void llvm::CallLowering::ValueHandler::assignValueToReg	(	unsigned	ValVReg,
		unsigned	PhysReg,
		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.

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

◆ extendRegister()

unsigned CallLowering::ValueHandler::extendRegister	(	unsigned	ValReg,
		CCValAssign &	VA
	)

Definition at line 158 of file CallLowering.cpp.

References llvm::CCValAssign::AExt, llvm::CCValAssign::BCvt, llvm::MachineIRBuilder::buildAnyExt(), llvm::MachineIRBuilder::buildSExt(), llvm::MachineIRBuilder::buildZExt(), llvm::CCValAssign::Full, llvm::CCValAssign::getLocInfo(), llvm::CCValAssign::getLocVT(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), llvm_unreachable, MRI, llvm::CCValAssign::SExt, and llvm::CCValAssign::ZExt.

◆ getStackAddress()

virtual unsigned llvm::CallLowering::ValueHandler::getStackAddress	(	uint64_t	Size,
		int64_t	Offset,
		MachinePointerInfo &	MPO
	)

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.

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

Member Data Documentation

◆ AssignFn

CCAssignFn* llvm::CallLowering::ValueHandler::AssignFn

Definition at line 111 of file CallLowering.h.

◆ MIRBuilder

MachineIRBuilder& llvm::CallLowering::ValueHandler::MIRBuilder

Definition at line 109 of file CallLowering.h.

◆ MRI

MachineRegisterInfo& llvm::CallLowering::ValueHandler::MRI

Definition at line 110 of file CallLowering.h.

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

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

Public Member Functions

Public Attributes

Detailed Description

Constructor & Destructor Documentation

◆ ValueHandler()

◆ ~ValueHandler()

Member Function Documentation

◆ assignArg()

◆ assignCustomValue()

◆ assignValueToAddress()

◆ assignValueToReg()

◆ extendRegister()

◆ getStackAddress()

Member Data Documentation

◆ AssignFn

◆ MIRBuilder

◆ MRI