llvm::RegisterBankInfo::InstructionMapping Class Reference

Helper class that represents how the value of an instruction may be mapped and what is the related cost of such mapping. More...

#include "llvm/CodeGen/RegisterBankInfo.h"

Public Member Functions
	InstructionMapping (unsigned ID, unsigned Cost, const ValueMapping *OperandsMapping, unsigned NumOperands)
	Constructor for the mapping of an instruction.
	InstructionMapping ()=default
	Default constructor.
unsigned	getCost () const
	Get the cost.
unsigned	getID () const
	Get the ID.
unsigned	getNumOperands () const
	Get the number of operands.
const ValueMapping &	getOperandMapping (unsigned i) const
	Get the value mapping of the ith operand.
void	setOperandsMapping (const ValueMapping *OpdsMapping)
	Set the mapping for all the operands.
bool	isValid () const
	Check whether this object is valid.
bool	verify (const MachineInstr &MI) const
	Verifiy that this mapping makes sense for MI.
void	dump () const
	Print this on dbgs() stream.
void	print (raw_ostream &OS) const
	Print this on OS;.

Detailed Description

Helper class that represents how the value of an instruction may be mapped and what is the related cost of such mapping.

Definition at line 191 of file RegisterBankInfo.h.

Constructor & Destructor Documentation

InstructionMapping() [1/2]

llvm::RegisterBankInfo::InstructionMapping::InstructionMapping ( unsigned  ID, unsigned  Cost, const ValueMapping *  OperandsMapping, unsigned  NumOperands  )

inline

Constructor for the mapping of an instruction.

NumOperands must be equal to number of all the operands of the related instruction. The rationale is that it is more efficient for the optimizers to be able to assume that the mapping of the ith operand is at the index i.

Definition at line 218 of file RegisterBankInfo.h.

InstructionMapping() [2/2]

llvm::RegisterBankInfo::InstructionMapping::InstructionMapping ( )

default

Default constructor.

Use this constructor to express that the mapping is invalid.

Member Function Documentation

dump()

LLVM_DUMP_METHOD void RegisterBankInfo::InstructionMapping::dump

(

)

const

Print this on dbgs() stream.

Definition at line 648 of file RegisterBankInfo.cpp.

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

getCost()

unsigned llvm::RegisterBankInfo::InstructionMapping::getCost ( ) const

inline

Get the cost.

Definition at line 229 of file RegisterBankInfo.h.

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

getID()

unsigned llvm::RegisterBankInfo::InstructionMapping::getID ( ) const

inline

Get the ID.

Definition at line 232 of file RegisterBankInfo.h.

Referenced by llvm::RegisterBankInfo::applyMapping(), isValid(), and llvm::RegisterBankInfo::OperandsMapper::print().

getNumOperands()

unsigned llvm::RegisterBankInfo::InstructionMapping::getNumOperands ( ) const

inline

Get the number of operands.

Definition at line 235 of file RegisterBankInfo.h.

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

getOperandMapping()

const ValueMapping & llvm::RegisterBankInfo::InstructionMapping::getOperandMapping ( unsigned  i ) const

inline

Get the value mapping of the ith operand.

Precondition

The mapping for the ith operand has been set.

The ith operand is a register.

Definition at line 240 of file RegisterBankInfo.h.

isValid()

bool llvm::RegisterBankInfo::InstructionMapping::isValid ( ) const

inline

Check whether this object is valid.

This is a lightweight check for obvious wrong instance.

Definition at line 255 of file RegisterBankInfo.h.

References getID(), and llvm::RegisterBankInfo::InvalidMappingID.

Referenced by llvm::RegBankSelect::computeMapping(), llvm::RegisterBankInfo::getInstrMapping(), llvm::AArch64RegisterBankInfo::getInstrMapping(), llvm::AMDGPURegisterBankInfo::getInstrMapping(), llvm::ARMRegisterBankInfo::getInstrMapping(), llvm::M68kRegisterBankInfo::getInstrMapping(), llvm::MipsRegisterBankInfo::getInstrMapping(), llvm::PPCRegisterBankInfo::getInstrMapping(), llvm::RISCVRegisterBankInfo::getInstrMapping(), and llvm::X86RegisterBankInfo::getInstrMapping().

print()

void RegisterBankInfo::InstructionMapping::print

(

raw_ostream &

OS

)

const

Print this on OS;.

Definition at line 654 of file RegisterBankInfo.cpp.

References OS.

Referenced by llvm::operator<<().

setOperandsMapping()

void llvm::RegisterBankInfo::InstructionMapping::setOperandsMapping ( const ValueMapping *  OpdsMapping )

inline

Set the mapping for all the operands.

In other words, OpdsMapping should hold at least getNumOperands ValueMapping.

Definition at line 249 of file RegisterBankInfo.h.

verify()

bool RegisterBankInfo::InstructionMapping::verify

(

const MachineInstr &

MI

)

const

Verifiy that this mapping makes sense for MI.

Precondition

MI must be connected to a MachineFunction.

Note

This method does not check anything when assertions are disabled.

Returns

True is the check was successful.

Definition at line 606 of file RegisterBankInfo.cpp.

References assert(), llvm::MachineOperand::getReg(), llvm::TargetSubtargetInfo::getRegBankInfo(), llvm::MachineFunction::getRegInfo(), llvm::TargetSubtargetInfo::getRegisterInfo(), llvm::RegisterBankInfo::getSizeInBits(), llvm::MachineFunction::getSubtarget(), Idx, isCopyLike(), llvm::MachineOperand::isReg(), llvm::LLT::isValid(), isValid(), MI, MRI, and llvm::RegisterBankInfo::ValueMapping::verify().

Referenced by llvm::RegBankSelect::assignInstr(), and llvm::RegisterBankInfo::OperandsMapper::OperandsMapper().

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

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