llvm::X86RegisterInfo Class Reference

#include <X86RegisterInfo.h>

Inheritance diagram for llvm::X86RegisterInfo:

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Collaboration diagram for llvm::X86RegisterInfo:

[legend]

List of all members.

Public Member Functions
	X86RegisterInfo (X86TargetMachine &tm, const TargetInstrInfo &tii)
unsigned	getStackAlignment () const
int	getDwarfRegNum (unsigned RegNum, bool isEH) const
const TargetRegisterClass *	getCrossCopyRegClass (const TargetRegisterClass *RC) const
const unsigned *	getCalleeSavedRegs (const MachineFunction *MF=0) const
const TargetRegisterClass *const *	getCalleeSavedRegClasses (const MachineFunction *MF=0) const
BitVector	getReservedRegs (const MachineFunction &MF) const
bool	hasFP (const MachineFunction &MF) const
bool	needsStackRealignment (const MachineFunction &MF) const
bool	hasReservedCallFrame (MachineFunction &MF) const
void	eliminateCallFramePseudoInstr (MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator MI) const
void	eliminateFrameIndex (MachineBasicBlock::iterator MI, int SPAdj, RegScavenger *RS=NULL) const
void	processFunctionBeforeFrameFinalized (MachineFunction &MF) const
void	processFunctionBeforeCalleeSavedScan (MachineFunction &MF, RegScavenger *RS=NULL) const
void	emitPrologue (MachineFunction &MF) const
void	emitEpilogue (MachineFunction &MF, MachineBasicBlock &MBB) const
void	emitFrameMoves (MachineFunction &MF, unsigned FrameLabelId, unsigned ReadyLabelId) const
unsigned	getRARegister () const
unsigned	getFrameRegister (MachineFunction &MF) const
int	getFrameIndexOffset (MachineFunction &MF, int FI) const
void	getInitialFrameState (std::vector< MachineMove > &Moves) const
unsigned	getEHExceptionRegister () const
unsigned	getEHHandlerRegister () const
Static Public Member Functions
static unsigned	getX86RegNum (unsigned RegNo)
Public Attributes
X86TargetMachine &	TM
const TargetInstrInfo &	TII

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Detailed Description

Definition at line 50 of file X86RegisterInfo.h.

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Constructor & Destructor Documentation

X86RegisterInfo::X86RegisterInfo	(	X86TargetMachine &	tm,
		const TargetInstrInfo &	tii
	)

Definition at line 43 of file X86RegisterInfo.cpp.

References llvm::N86::EBP, llvm::N86::ESP, llvm::X86TargetMachine::getFrameInfo(), llvm::TargetFrameInfo::getStackAlignment(), llvm::TargetMachine::getSubtarget(), llvm::X86Subtarget::is64Bit(), llvm::X86Subtarget::isTargetWin64(), Subtarget, and TM.

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Member Function Documentation

unsigned X86RegisterInfo::getX86RegNum

(

unsigned

RegNo

)

[static]

getX86RegNum - Returns the native X86 register number for the given LLVM register identifier.

Definition at line 94 of file X86RegisterInfo.cpp.

References llvm::ARMCC::AL, llvm::XCoreISD::BL, llvm::N86::EAX, llvm::N86::EBP, llvm::N86::EBX, llvm::N86::ECX, llvm::N86::EDI, llvm::N86::EDX, llvm::N86::ESI, and llvm::N86::ESP.

Referenced by getMemModRMByteSize().

unsigned llvm::X86RegisterInfo::getStackAlignment

(

)

const [inline]

Definition at line 87 of file X86RegisterInfo.h.

Referenced by llvm::X86InstrInfo::loadRegFromAddr(), llvm::X86InstrInfo::loadRegFromStackSlot(), llvm::X86InstrInfo::storeRegToAddr(), llvm::X86InstrInfo::storeRegToStackSlot(), and llvm::X86InstrInfo::unfoldMemoryOperand().

int X86RegisterInfo::getDwarfRegNum	(	unsigned	RegNum,
		bool	isEH
	)			const

getDwarfRegNum - allows modification of X86GenRegisterInfo::getDwarfRegNum (created by TableGen) for target dependencies.

Definition at line 71 of file X86RegisterInfo.cpp.

References llvm::TargetMachine::getSubtarget(), llvm::X86Subtarget::is64Bit(), llvm::X86Subtarget::isTargetCygMing(), llvm::X86Subtarget::isTargetDarwin(), Subtarget, TM, llvm::DWARFFlavour::X86_32_DarwinEH, llvm::DWARFFlavour::X86_32_Generic, and llvm::DWARFFlavour::X86_64.

const TargetRegisterClass * X86RegisterInfo::getCrossCopyRegClass

(

const TargetRegisterClass *

RC

)

const

Code Generation virtual methods... getCrossCopyRegClass - Returns a legal register class to copy a register in the specified class to or from. Returns NULL if it is possible to copy between a two registers of the specified class.

Definition at line 155 of file X86RegisterInfo.cpp.

const unsigned * X86RegisterInfo::getCalleeSavedRegs

(

const MachineFunction *

MF = 0

)

const

getCalleeSavedRegs - Return a null-terminated list of all of the callee-save registers on this target.

Definition at line 166 of file X86RegisterInfo.cpp.

References llvm::MachineModuleInfo::callsEHReturn(), llvm::N86::EAX, llvm::N86::EBP, llvm::N86::EBX, llvm::N86::EDI, llvm::N86::EDX, llvm::N86::ESI, llvm::MachineFunction::getFrameInfo(), llvm::MachineFrameInfo::getMachineModuleInfo(), MFI, and MMI.

const TargetRegisterClass *const * X86RegisterInfo::getCalleeSavedRegClasses

(

const MachineFunction *

MF = 0

)

const

getCalleeSavedRegClasses - Return a null-terminated list of the preferred register classes to spill each callee-saved register with. The order and length of this list match the getCalleeSavedRegs() list.

Definition at line 211 of file X86RegisterInfo.cpp.

References llvm::MachineModuleInfo::callsEHReturn(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFrameInfo::getMachineModuleInfo(), MFI, and MMI.

BitVector X86RegisterInfo::getReservedRegs

(

const MachineFunction &

MF

)

const

getReservedRegs - Returns a bitset indexed by physical register number indicating if a register is a special register that has particular uses and should be considered unavailable at all times, e.g. SP, RA. This is used by register scavenger to determine what registers are free.

Definition at line 264 of file X86RegisterInfo.cpp.

References llvm::N86::EBP, llvm::N86::ESP, hasFP(), and llvm::BitVector::set().

bool X86RegisterInfo::hasFP

(

const MachineFunction &

MF

)

const

Definition at line 314 of file X86RegisterInfo.cpp.

References llvm::MachineModuleInfo::callsUnwindInit(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getInfo(), llvm::MachineFrameInfo::getMachineModuleInfo(), llvm::MachineFrameInfo::hasVarSizedObjects(), llvm::MachineFrameInfo::isFrameAddressTaken(), MFI, MMI, needsStackRealignment(), and llvm::NoFramePointerElim.

Referenced by eliminateFrameIndex(), emitEpilogue(), emitFrameMoves(), emitPrologue(), getFrameIndexOffset(), getFrameRegister(), getReservedRegs(), and processFunctionBeforeFrameFinalized().

bool X86RegisterInfo::needsStackRealignment

(

const MachineFunction &

MF

)

const

Definition at line 326 of file X86RegisterInfo.cpp.

References llvm::MachineFunction::getFrameInfo(), llvm::MachineFrameInfo::getMaxAlignment(), llvm::MachineFrameInfo::hasVarSizedObjects(), MFI, and llvm::RealignStack.

Referenced by eliminateFrameIndex(), emitEpilogue(), emitPrologue(), getFrameIndexOffset(), hasFP(), llvm::X86InstrInfo::loadRegFromAddr(), llvm::X86InstrInfo::loadRegFromStackSlot(), llvm::X86InstrInfo::storeRegToAddr(), llvm::X86InstrInfo::storeRegToStackSlot(), and llvm::X86InstrInfo::unfoldMemoryOperand().

bool X86RegisterInfo::hasReservedCallFrame

(

MachineFunction &

MF

)

const

Definition at line 336 of file X86RegisterInfo.cpp.

References llvm::MachineFunction::getFrameInfo(), and llvm::MachineFrameInfo::hasVarSizedObjects().

Referenced by eliminateCallFramePseudoInstr().

void X86RegisterInfo::eliminateCallFramePseudoInstr	(	MachineFunction &	MF,
		MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator	MI
	)			const

Definition at line 374 of file X86RegisterInfo.cpp.

References llvm::MachineInstrBuilder::addImm(), llvm::BuildMI(), llvm::MachineBasicBlock::erase(), llvm::TargetInstrInfo::get(), llvm::MachineOperand::getImm(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), hasReservedCallFrame(), llvm::MachineBasicBlock::insert(), llvm::MachineOperand::setIsDead(), and TII.

void X86RegisterInfo::eliminateFrameIndex	(	MachineBasicBlock::iterator	MI,
		int	SPAdj,
		RegScavenger *	RS = NULL
	)			const

Definition at line 435 of file X86RegisterInfo.cpp.

References llvm::MachineOperand::ChangeToImmediate(), llvm::MachineOperand::ChangeToRegister(), FrameIndex, getFrameIndexOffset(), llvm::MachineOperand::getImm(), llvm::MachineOperand::getIndex(), llvm::MachineInstr::getNumOperands(), llvm::MachineOperand::getOffset(), llvm::MachineInstr::getOperand(), llvm::MachineBasicBlock::getParent(), llvm::MachineInstr::getParent(), hasFP(), llvm::MachineOperand::isFI(), llvm::MachineOperand::isImm(), MF, MI, needsStackRealignment(), Offset, and llvm::MachineOperand::setOffset().

void X86RegisterInfo::processFunctionBeforeFrameFinalized

(

MachineFunction &

MF

)

const

Definition at line 488 of file X86RegisterInfo.cpp.

References llvm::MachineFrameInfo::CreateFixedObject(), FrameIdx, llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getInfo(), llvm::MachineFrameInfo::getObjectIndexBegin(), llvm::X86MachineFunctionInfo::getTCReturnAddrDelta(), and hasFP().

void X86RegisterInfo::processFunctionBeforeCalleeSavedScan	(	MachineFunction &	MF,
		RegScavenger *	RS = NULL
	)			const

Definition at line 475 of file X86RegisterInfo.cpp.

References calculateMaxStackAlignment(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFrameInfo::getMaxAlignment(), and llvm::MachineFrameInfo::setMaxAlignment().

void X86RegisterInfo::emitPrologue

(

MachineFunction &

MF

)

const

Definition at line 707 of file X86RegisterInfo.cpp.

References llvm::MachineInstrBuilder::addImm(), llvm::addRegOffset(), llvm::ARMCC::AL, llvm::MachineFunction::begin(), llvm::MachineBasicBlock::begin(), llvm::BuildMI(), llvm::ISD::DBG_LABEL, llvm::DisableRedZone, llvm::Function::doesNotThrow(), E, llvm::N86::EAX, emitFrameMoves(), emitSPUpdate(), llvm::MachineBasicBlock::end(), llvm::MachineFunction::end(), llvm::MachineFunction::front(), llvm::TargetInstrInfo::get(), llvm::X86MachineFunctionInfo::getCalleeSavedFrameSize(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), llvm::MachineFrameInfo::getMachineModuleInfo(), llvm::MachineFrameInfo::getMaxAlignment(), llvm::MachineInstr::getOperand(), llvm::MachineFunction::getRegInfo(), llvm::MachineFrameInfo::getStackSize(), llvm::TargetMachine::getSubtarget(), llvm::MachineFunction::getTarget(), llvm::X86MachineFunctionInfo::getTCReturnAddrDelta(), llvm::MachineFrameInfo::hasCalls(), hasFP(), llvm::MachineFrameInfo::hasVarSizedObjects(), II, llvm::MachineBasicBlock::insert(), llvm::X86Subtarget::isTargetCygMing(), llvm::MachineRegisterInfo::livein_begin(), llvm::MachineRegisterInfo::livein_end(), MBB, MBBI, mergeSPUpdates(), mergeSPUpdatesDown(), MFI, MI, MMI, needsStackRealignment(), llvm::next(), Reg, llvm::X86MachineFunctionInfo::setCalleeSavedFrameSize(), llvm::MachineOperand::setIsDead(), llvm::MachineFrameInfo::setOffsetAdjustment(), llvm::MachineFrameInfo::setStackSize(), Subtarget, TII, and llvm::UnwindTablesMandatory.

void X86RegisterInfo::emitEpilogue	(	MachineFunction &	MF,
		MachineBasicBlock &	MBB
	)			const

Definition at line 868 of file X86RegisterInfo.cpp.

References llvm::addRegOffset(), llvm::MachineBasicBlock::begin(), llvm::BuildMI(), llvm::X86ISD::EH_RETURN, emitSPUpdate(), llvm::MachineBasicBlock::end(), llvm::MachineBasicBlock::erase(), llvm::TargetInstrInfo::get(), llvm::X86MachineFunctionInfo::getCalleeSavedFrameSize(), llvm::MachineFunction::getFrameInfo(), llvm::MachineOperand::getImm(), llvm::MachineFunction::getInfo(), llvm::MachineFrameInfo::getMaxAlignment(), llvm::MachineFrameInfo::getStackSize(), llvm::X86MachineFunctionInfo::getTCReturnAddrDelta(), hasFP(), llvm::MachineFrameInfo::hasVarSizedObjects(), llvm::MachineBasicBlock::insert(), llvm::MachineOperand::isImm(), MBBI, mergeSPUpdates(), mergeSPUpdatesUp(), MFI, MI, needsStackRealignment(), Offset, PI, llvm::prior(), llvm::ISD::RET, and TII.

void X86RegisterInfo::emitFrameMoves	(	MachineFunction &	MF,
		unsigned	FrameLabelId,
		unsigned	ReadyLabelId
	)			const

Definition at line 633 of file X86RegisterInfo.cpp.

References E, llvm::MachineFrameInfo::getCalleeSavedInfo(), llvm::TargetMachine::getFrameInfo(), llvm::MachineFunction::getFrameInfo(), llvm::MachineModuleInfo::getFrameMoves(), llvm::MachineFrameInfo::getMachineModuleInfo(), llvm::MachineFrameInfo::getObjectOffset(), llvm::TargetData::getPointerSize(), llvm::TargetFrameInfo::getStackGrowthDirection(), llvm::MachineFrameInfo::getStackSize(), llvm::MachineFunction::getTarget(), llvm::TargetMachine::getTargetData(), hasFP(), MFI, MMI, Offset, Reg, llvm::TargetFrameInfo::StackGrowsUp, TD, and llvm::MachineLocation::VirtualFP.

Referenced by emitPrologue().

unsigned X86RegisterInfo::getRARegister

(

)

const

Definition at line 1006 of file X86RegisterInfo.cpp.

Referenced by getInitialFrameState().

unsigned X86RegisterInfo::getFrameRegister

(

MachineFunction &

MF

)

const

Definition at line 1013 of file X86RegisterInfo.cpp.

References hasFP().

int X86RegisterInfo::getFrameIndexOffset	(	MachineFunction &	MF,
		int	FI
	)			const

Definition at line 341 of file X86RegisterInfo.cpp.

References Align, llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getInfo(), llvm::MachineFrameInfo::getObjectAlignment(), llvm::MachineFrameInfo::getObjectOffset(), llvm::MachineFrameInfo::getStackSize(), llvm::X86MachineFunctionInfo::getTCReturnAddrDelta(), hasFP(), needsStackRealignment(), and Offset.

Referenced by eliminateFrameIndex().

void X86RegisterInfo::getInitialFrameState

(

std::vector< MachineMove > &

Moves

)

const

Definition at line 1017 of file X86RegisterInfo.cpp.

References getRARegister(), Src, and llvm::MachineLocation::VirtualFP.

unsigned X86RegisterInfo::getEHExceptionRegister

(

)

const

Definition at line 1033 of file X86RegisterInfo.cpp.

unsigned X86RegisterInfo::getEHHandlerRegister

(

)

const

Definition at line 1038 of file X86RegisterInfo.cpp.

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Member Data Documentation

X86TargetMachine& llvm::X86RegisterInfo::TM

Definition at line 52 of file X86RegisterInfo.h.

Referenced by getDwarfRegNum(), and X86RegisterInfo().

const TargetInstrInfo& llvm::X86RegisterInfo::TII

Definition at line 53 of file X86RegisterInfo.h.

Referenced by eliminateCallFramePseudoInstr(), emitEpilogue(), and emitPrologue().

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

• X86RegisterInfo.h
• X86RegisterInfo.cpp