Helper class used to get/create the virtual registers that will be used to replace the MachineOperand when applying a mapping. More...

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

Public Member Functions
	OperandsMapper (MachineInstr &MI, const InstructionMapping &InstrMapping, MachineRegisterInfo &MRI)
	Create an OperandsMapper that will hold the information to apply `InstrMapping` to `MI`. More...

void	createVRegs (unsigned OpIdx)
	Create as many new virtual registers as needed for the mapping of the `OpIdx-th` operand. More...

void	setVRegs (unsigned OpIdx, unsigned PartialMapIdx, unsigned NewVReg)
	Set the virtual register of the `PartialMapIdx-th` partial mapping of the OpIdx-th operand to `NewVReg`. More...

iterator_range< SmallVectorImpl< unsigned >::const_iterator >	getVRegs (unsigned OpIdx, bool ForDebug=false) const
	Get all the virtual registers required to map the `OpIdx-th` operand of the instruction. More...

void	dump () const
	Print this operands mapper on dbgs() stream. More...

void	print (raw_ostream &OS, bool ForDebug=false) const
	Print this operands mapper on `OS` stream. More...

Getters.
The MachineInstr being remapped.
MachineInstr &	getMI () const

const InstructionMapping &	getInstrMapping () const
	The final mapping of the instruction. More...

MachineRegisterInfo &	getMRI () const
	The MachineRegisterInfo we used to realize the mapping. More...

Detailed Description

Helper class used to get/create the virtual registers that will be used to replace the MachineOperand when applying a mapping.

Definition at line 278 of file RegisterBankInfo.h.

Constructor & Destructor Documentation

◆ OperandsMapper()

RegisterBankInfo::OperandsMapper::OperandsMapper	(	MachineInstr &	MI,
		const InstructionMapping &	InstrMapping,
		MachineRegisterInfo &	MRI
	)

Create an OperandsMapper that will hold the information to apply InstrMapping to MI.

Precondition: InstrMapping.verify(MI)

Definition at line 604 of file RegisterBankInfo.cpp.

References assert(), getInstrMapping(), llvm::RegisterBankInfo::InstructionMapping::getNumOperands(), llvm::RegisterBankInfo::ValueMapping::NumBreakDowns, llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::SmallVectorImpl< T >::resize(), llvm::SmallVectorBase::size(), and llvm::RegisterBankInfo::InstructionMapping::verify().

Member Function Documentation

◆ createVRegs()

void RegisterBankInfo::OperandsMapper::createVRegs ( unsigned OpIdx )

Create as many new virtual registers as needed for the mapping of the OpIdx-th operand.

The number of registers is determined by the number of breakdown for the related operand in the instruction mapping. The type of the new registers is a plain scalar of the right size. The proper type is expected to be set when the mapping is applied to the instruction(s) that realizes the mapping.

Precondition: getMI().getOperand(OpIdx).isReg()

Postcondition: All the partial mapping of the OpIdx-th operand have been assigned a new virtual register.

Definition at line 650 of file RegisterBankInfo.cpp.

References assert(), llvm::RegisterBankInfo::ValueMapping::begin(), llvm::MachineRegisterInfo::createGenericVirtualRegister(), llvm::RegisterBankInfo::ValueMapping::end(), getInstrMapping(), llvm::RegisterBankInfo::PartialMapping::Length, llvm::RegisterBankInfo::PartialMapping::RegBank, llvm::LLT::scalar(), and llvm::MachineRegisterInfo::setRegBank().

Referenced by llvm::RegBankSelect::getAnalysisUsage().

◆ dump()

LLVM_DUMP_METHOD void RegisterBankInfo::OperandsMapper::dump ( ) const

Print this operands mapper on dbgs() stream.

Definition at line 708 of file RegisterBankInfo.cpp.

References llvm::dbgs(), and print().

◆ getInstrMapping()

const InstructionMapping& llvm::RegisterBankInfo::OperandsMapper::getInstrMapping ( ) const

inline

The final mapping of the instruction.

Definition at line 330 of file RegisterBankInfo.h.

Referenced by llvm::RegisterBankInfo::applyDefaultMapping(), createVRegs(), llvm::AArch64RegisterBankInfo::getInstrAlternativeMappings(), getVRegs(), OperandsMapper(), print(), and setVRegs().

◆ getMI()

MachineInstr& llvm::RegisterBankInfo::OperandsMapper::getMI ( ) const

inline

Definition at line 327 of file RegisterBankInfo.h.

References MI.

Referenced by llvm::RegisterBankInfo::applyDefaultMapping(), llvm::AArch64RegisterBankInfo::getInstrAlternativeMappings(), and print().

◆ getMRI()

MachineRegisterInfo& llvm::RegisterBankInfo::OperandsMapper::getMRI ( ) const

inline

The MachineRegisterInfo we used to realize the mapping.

Definition at line 333 of file RegisterBankInfo.h.

References llvm::RegisterBankInfo::PartialMapping::dump(), MRI, and llvm::RegisterBankInfo::PartialMapping::print().

Referenced by llvm::RegisterBankInfo::applyDefaultMapping().

◆ getVRegs()

iterator_range< SmallVectorImpl< unsigned >::const_iterator > RegisterBankInfo::OperandsMapper::getVRegs	(	unsigned	OpIdx,
		bool	ForDebug = `false`
	)		const

Get all the virtual registers required to map the OpIdx-th operand of the instruction.

This return an empty range when createVRegs or setVRegs has not been called. The iterator may be invalidated by a call to setVRegs or createVRegs.

When ForDebug is true, we will not check that the list of new virtual registers does not contain uninitialized values.

Precondition: getMI().getOperand(OpIdx).isReg(); ForDebug || All partial mappings have been set a register

Definition at line 685 of file RegisterBankInfo.cpp.

References assert(), llvm::SmallVectorTemplateCommon< T, typename >::end(), getInstrMapping(), llvm::make_range(), and llvm::RegisterBankInfo::ValueMapping::NumBreakDowns.

Referenced by llvm::RegisterBankInfo::applyDefaultMapping(), llvm::RegBankSelect::getAnalysisUsage(), and print().

◆ print()

void RegisterBankInfo::OperandsMapper::print	(	raw_ostream &	OS,
		bool	ForDebug = `false`
	)		const

Print this operands mapper on OS stream.

Definition at line 714 of file RegisterBankInfo.cpp.

References llvm::RegisterBankInfo::InstructionMapping::getID(), getInstrMapping(), llvm::MachineInstr::getMF(), getMI(), llvm::RegisterBankInfo::InstructionMapping::getNumOperands(), llvm::MachineInstr::getParent(), getReg(), llvm::TargetSubtargetInfo::getRegisterInfo(), llvm::MachineFunction::getSubtarget(), getVRegs(), and llvm::printReg().

Referenced by dump().

◆ setVRegs()

void RegisterBankInfo::OperandsMapper::setVRegs	(	unsigned	OpIdx,
		unsigned	PartialMapIdx,
		unsigned	NewVReg
	)

Set the virtual register of the PartialMapIdx-th partial mapping of the OpIdx-th operand to NewVReg.

Precondition: getMI().getOperand(OpIdx).isReg(); getInstrMapping().getOperandMapping(OpIdx).BreakDown.size() > PartialMapIdx; NewReg != 0

Postcondition: the PartialMapIdx-th register of the value mapping of the OpIdx-th operand has been set.

Definition at line 670 of file RegisterBankInfo.cpp.

References assert(), and getInstrMapping().

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

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

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ OperandsMapper()

Member Function Documentation

◆ createVRegs()

◆ dump()

◆ getInstrMapping()

◆ getMI()

◆ getMRI()

◆ getVRegs()

◆ print()

◆ setVRegs()