llvm::TargetInstrInfoImpl Class Reference

#include <TargetInstrInfo.h>

Inheritance diagram for llvm::TargetInstrInfoImpl:

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Collaboration diagram for llvm::TargetInstrInfoImpl:

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List of all members.

Public Member Functions
virtual MachineInstr *	commuteInstruction (MachineInstr *MI, bool NewMI=false) const
virtual bool	CommuteChangesDestination (MachineInstr *MI, unsigned &OpIdx) const
virtual bool	PredicateInstruction (MachineInstr *MI, const SmallVectorImpl< MachineOperand > &Pred) const
virtual void	reMaterialize (MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, unsigned DestReg, const MachineInstr *Orig) const
virtual unsigned	GetFunctionSizeInBytes (const MachineFunction &MF) const
Protected Member Functions
	TargetInstrInfoImpl (const TargetInstrDesc *desc, unsigned NumOpcodes)

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Detailed Description

TargetInstrInfoImpl - This is the default implementation of TargetInstrInfo, which just provides a couple of default implementations for various methods. This separated out because it is implemented in libcodegen, not in libtarget.

Definition at line 465 of file TargetInstrInfo.h.

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Constructor & Destructor Documentation

llvm::TargetInstrInfoImpl::TargetInstrInfoImpl	(	const TargetInstrDesc *	desc,
		unsigned	NumOpcodes
	)			[inline, protected]

Definition at line 467 of file TargetInstrInfo.h.

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Member Function Documentation

MachineInstr * TargetInstrInfoImpl::commuteInstruction	(	MachineInstr *	MI,
		bool	NewMI = false
	)			const [virtual]

commuteInstruction - If a target has any instructions that are commutable, but require converting to a different instruction or making non-trivial changes to commute them, this method can overloaded to do this. The default implementation of this method simply swaps the first two operands of MI and returns it.

If a target wants to make more aggressive changes, they can construct and return a new machine instruction. If an instruction cannot commute, it can also return null.

If NewMI is true, then a new machine instruction must be created.

Implements llvm::TargetInstrInfo.

Reimplemented in llvm::PPCInstrInfo, and llvm::X86InstrInfo.

Definition at line 25 of file TargetInstrInfoImpl.cpp.

References llvm::MachineInstrBuilder::addReg(), llvm::BuildMI(), llvm::MachineInstr::getDebugLoc(), llvm::MachineInstr::getDesc(), llvm::MachineInstr::getOperand(), llvm::TargetInstrDesc::getOperandConstraint(), llvm::MachineBasicBlock::getParent(), llvm::MachineInstr::getParent(), llvm::MachineOperand::getReg(), llvm::MachineOperand::isDead(), llvm::MachineOperand::isKill(), llvm::MachineOperand::isReg(), MF, llvm::MachineOperand::setIsKill(), llvm::MachineOperand::setReg(), and llvm::TOI::TIED_TO.

Referenced by llvm::X86InstrInfo::commuteInstruction(), and llvm::PPCInstrInfo::commuteInstruction().

bool TargetInstrInfoImpl::CommuteChangesDestination	(	MachineInstr *	MI,
		unsigned &	OpIdx
	)			const [virtual]

CommuteChangesDestination - Return true if commuting the specified instruction will also changes the destination operand. Also return the current operand index of the would be new destination register by reference. This can happen when the commutable instruction is also a two-address instruction.

Implements llvm::TargetInstrInfo.

Definition at line 67 of file TargetInstrInfoImpl.cpp.

References llvm::MachineInstr::getDesc(), llvm::MachineInstr::getOperand(), llvm::TargetInstrDesc::getOperandConstraint(), llvm::MachineOperand::getReg(), llvm::MachineOperand::isReg(), and llvm::TOI::TIED_TO.

bool TargetInstrInfoImpl::PredicateInstruction	(	MachineInstr *	MI,
		const SmallVectorImpl< MachineOperand > &	Pred
	)			const [virtual]

PredicateInstruction - Convert the instruction into a predicated instruction. It returns true if the operation was successful.

Implements llvm::TargetInstrInfo.

Reimplemented in llvm::ARMInstrInfo.

Definition at line 82 of file TargetInstrInfoImpl.cpp.

References llvm::MachineInstr::getDesc(), llvm::MachineInstr::getNumOperands(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::isImm(), llvm::MachineOperand::isMBB(), llvm::TargetInstrDesc::isPredicable(), llvm::TargetOperandInfo::isPredicate(), llvm::MachineOperand::isReg(), MadeChange, llvm::TargetInstrDesc::OpInfo, llvm::MachineOperand::setImm(), llvm::MachineOperand::setMBB(), and llvm::MachineOperand::setReg().

void TargetInstrInfoImpl::reMaterialize	(	MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator	MI,
		unsigned	DestReg,
		const MachineInstr *	Orig
	)			const [virtual]

reMaterialize - Re-issue the specified 'original' instruction at the specific location targeting a new destination register.

Implements llvm::TargetInstrInfo.

Reimplemented in llvm::ARMInstrInfo, and llvm::X86InstrInfo.

Definition at line 108 of file TargetInstrInfoImpl.cpp.

References llvm::MachineFunction::CloneMachineInstr(), llvm::MachineInstr::getOperand(), llvm::MachineBasicBlock::getParent(), llvm::MachineBasicBlock::insert(), MI, and llvm::MachineOperand::setReg().

unsigned TargetInstrInfoImpl::GetFunctionSizeInBytes

(

const MachineFunction &

MF

)

const [virtual]

GetFunctionSizeInBytes - Returns the size of the specified MachineFunction.

Implements llvm::TargetInstrInfo.

Definition at line 118 of file TargetInstrInfoImpl.cpp.

References llvm::MachineBasicBlock::begin(), llvm::MachineFunction::begin(), E, llvm::MachineBasicBlock::end(), llvm::MachineFunction::end(), llvm::TargetInstrInfo::GetInstSizeInBytes(), MBB, and MBBI.

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

• TargetInstrInfo.h
• TargetInstrInfoImpl.cpp