#include "Target/X86/X86RegisterInfo.h"

Inheritance diagram for llvm::X86RegisterInfo:

Collaboration diagram for llvm::X86RegisterInfo:

Public Member Functions
	X86RegisterInfo (const Triple &TT)

int	getSEHRegNum (unsigned i) const

bool	trackLivenessAfterRegAlloc (const MachineFunction &MF) const override
	Code Generation virtual methods... More...

const TargetRegisterClass *	getMatchingSuperRegClass (const TargetRegisterClass A, const TargetRegisterClass B, unsigned Idx) const override
	getMatchingSuperRegClass - Return a subclass of the specified register class A so that each register in it has a sub-register of the specified sub-register index which is in the specified register class B. More...

const TargetRegisterClass *	getSubClassWithSubReg (const TargetRegisterClass *RC, unsigned Idx) const override

const TargetRegisterClass *	getLargestLegalSuperClass (const TargetRegisterClass *RC, const MachineFunction &MF) const override

const TargetRegisterClass *	getPointerRegClass (const MachineFunction &MF, unsigned Kind=0) const override
	getPointerRegClass - Returns a TargetRegisterClass used for pointer values. More...

const TargetRegisterClass *	getCrossCopyRegClass (const TargetRegisterClass *RC) const override
	getCrossCopyRegClass - Returns a legal register class to copy a register in the specified class to or from. More...

const TargetRegisterClass *	getGPRsForTailCall (const MachineFunction &MF) const
	getGPRsForTailCall - Returns a register class with registers that can be used in forming tail calls. More...

unsigned	getRegPressureLimit (const TargetRegisterClass *RC, MachineFunction &MF) const override

const MCPhysReg *	getCalleeSavedRegs (const MachineFunction *MF) const override
	getCalleeSavedRegs - Return a null-terminated list of all of the callee-save registers on this target. More...

const MCPhysReg *	getCalleeSavedRegsViaCopy (const MachineFunction *MF) const

const uint32_t *	getCallPreservedMask (const MachineFunction &MF, CallingConv::ID) const override

const uint32_t *	getNoPreservedMask () const override

const uint32_t *	getDarwinTLSCallPreservedMask () const

BitVector	getReservedRegs (const MachineFunction &MF) const override
	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. More...

void	adjustStackMapLiveOutMask (uint32_t *Mask) const override

bool	hasBasePointer (const MachineFunction &MF) const

bool	canRealignStack (const MachineFunction &MF) const override

bool	hasReservedSpillSlot (const MachineFunction &MF, unsigned Reg, int &FrameIdx) const override

void	eliminateFrameIndex (MachineBasicBlock::iterator MI, int SPAdj, unsigned FIOperandNum, RegScavenger *RS=nullptr) const override

unsigned	getFrameRegister (const MachineFunction &MF) const override

unsigned	getPtrSizedFrameRegister (const MachineFunction &MF) const

unsigned	getStackRegister () const

unsigned	getBaseRegister () const

unsigned	getFramePtr () const
	Returns physical register used as frame pointer. More...

unsigned	getSlotSize () const

Detailed Description

Definition at line 25 of file X86RegisterInfo.h.

Constructor & Destructor Documentation

◆ X86RegisterInfo()

X86RegisterInfo::X86RegisterInfo ( const Triple & TT )

Definition at line 45 of file X86RegisterInfo.cpp.

References llvm::N86::EBX, llvm::N86::ESI, llvm::N86::ESP, llvm::Triple::getEnvironment(), llvm::Triple::GNUX32, llvm::X86_MC::initLLVMToSEHAndCVRegMapping(), llvm::Triple::isArch64Bit(), and llvm::Triple::isOSWindows().

Member Function Documentation

◆ adjustStackMapLiveOutMask()

void X86RegisterInfo::adjustStackMapLiveOutMask ( uint32_t * Mask ) const

override

Definition at line 586 of file X86RegisterInfo.cpp.

References assert(), and Reg.

◆ canRealignStack()

bool X86RegisterInfo::canRealignStack ( const MachineFunction & MF ) const

override

Definition at line 625 of file X86RegisterInfo.cpp.

References llvm::TargetRegisterInfo::canRealignStack(), llvm::MachineRegisterInfo::canReserveReg(), CantUseSP(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getRegInfo(), and MRI.

◆ eliminateFrameIndex()

void X86RegisterInfo::eliminateFrameIndex	(	MachineBasicBlock::iterator	MI,
		int	SPAdj,
		unsigned	FIOperandNum,
		RegScavenger *	RS = `nullptr`
	)		const

override

◆ getBaseRegister()

unsigned llvm::X86RegisterInfo::getBaseRegister ( ) const

inline

Definition at line 135 of file X86RegisterInfo.h.

Referenced by llvm::X86FrameLowering::determineCalleeSaves(), llvm::X86TargetLowering::EmitInstrWithCustomInserter(), llvm::X86FrameLowering::emitPrologue(), llvm::X86FrameLowering::getFrameIndexReference(), getReservedRegs(), getRetpolineSymbol(), recoverFramePointer(), llvm::X86TargetLowering::ReplaceNodeResults(), and llvm::X86FrameLowering::restoreWin32EHStackPointers().

◆ getCalleeSavedRegs()

const MCPhysReg * X86RegisterInfo::getCalleeSavedRegs ( const MachineFunction * MF ) const

override

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

Definition at line 265 of file X86RegisterInfo.cpp.

References llvm::CallingConv::AnyReg, assert(), llvm::MachineFunction::callsEHReturn(), llvm::CallingConv::Cold, llvm::CallingConv::CXX_FAST_TLS, F(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), llvm::MachineFunction::getSubtarget(), llvm::X86Subtarget::getTargetLowering(), llvm::CallingConv::GHC, llvm::X86Subtarget::hasAVX(), llvm::X86Subtarget::hasAVX512(), llvm::Function::hasFnAttribute(), llvm::X86Subtarget::hasSSE1(), llvm::CallingConv::HHVM, llvm::CallingConv::HiPE, llvm::CallingConv::Intel_OCL_BI, llvm::CallingConv::PreserveAll, llvm::CallingConv::PreserveMost, llvm::X86TargetLowering::supportSwiftError(), llvm::Attribute::SwiftError, llvm::CallingConv::Win64, llvm::CallingConv::X86_64_SysV, llvm::CallingConv::X86_INTR, and llvm::CallingConv::X86_RegCall.

◆ getCalleeSavedRegsViaCopy()

const MCPhysReg * X86RegisterInfo::getCalleeSavedRegsViaCopy ( const MachineFunction * MF ) const

Definition at line 380 of file X86RegisterInfo.cpp.

References assert(), llvm::CallingConv::CXX_FAST_TLS, llvm::Function::getCallingConv(), llvm::MachineFunction::getFunction(), and llvm::MachineFunction::getInfo().

Referenced by llvm::X86TargetLowering::isIntDivCheap(), and Passv64i1ArgInRegs().

◆ getCallPreservedMask()

const uint32_t * X86RegisterInfo::getCallPreservedMask	(	const MachineFunction &	MF,
		CallingConv::ID	CC
	)		const

override

Definition at line 390 of file X86RegisterInfo.cpp.

Referenced by createPHIsForCMOVsInSinkBB(), getMOVL(), getReservedRegs(), and MatchingStackOffset().

◆ getCrossCopyRegClass()

const TargetRegisterClass * X86RegisterInfo::getCrossCopyRegClass ( const TargetRegisterClass * RC ) const

override

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 234 of file X86RegisterInfo.cpp.

◆ getDarwinTLSCallPreservedMask()

const uint32_t * X86RegisterInfo::getDarwinTLSCallPreservedMask ( ) const

Definition at line 492 of file X86RegisterInfo.cpp.

Referenced by createPHIsForCMOVsInSinkBB().

◆ getFramePtr()

unsigned llvm::X86RegisterInfo::getFramePtr ( ) const

inline

Returns physical register used as frame pointer.

This will always returns the frame pointer register, contrary to getFrameRegister() which returns the "base pointer" in situations involving a stack, frame and base pointer.

Definition at line 140 of file X86RegisterInfo.h.

Referenced by llvm::X86FrameLowering::getFrameIndexReference().

◆ getFrameRegister()

unsigned X86RegisterInfo::getFrameRegister ( const MachineFunction & MF ) const

override

Definition at line 753 of file X86RegisterInfo.cpp.

References llvm::X86FrameLowering::hasFP().

Referenced by llvm::X86FrameLowering::emitEpilogue(), llvm::X86FrameLowering::emitPrologue(), llvm::X86FrameLowering::getFrameIndexReference(), getPtrSizedFrameRegister(), getRetpolineSymbol(), llvm::X86TargetLowering::needsFixedCatchObjects(), and llvm::X86FrameLowering::restoreWin32EHStackPointers().

◆ getGPRsForTailCall()

const TargetRegisterClass * X86RegisterInfo::getGPRsForTailCall ( const MachineFunction & MF ) const

getGPRsForTailCall - Returns a register class with registers that can be used in forming tail calls.

Definition at line 220 of file X86RegisterInfo.cpp.

References F(), llvm::Function::getCallingConv(), llvm::MachineFunction::getFunction(), llvm::CallingConv::HiPE, and llvm::CallingConv::Win64.

Referenced by findDeadCallerSavedReg(), and getPointerRegClass().

◆ getLargestLegalSuperClass()

const TargetRegisterClass * X86RegisterInfo::getLargestLegalSuperClass	(	const TargetRegisterClass *	RC,
		const MachineFunction &	MF
	)		const

override

Definition at line 113 of file X86RegisterInfo.cpp.

References llvm::MachineFunction::getSubtarget(), llvm::TargetRegisterClass::getSuperClasses(), llvm::X86Subtarget::hasAVX512(), llvm::X86Subtarget::hasVLX(), and I.

◆ getMatchingSuperRegClass()

const TargetRegisterClass * X86RegisterInfo::getMatchingSuperRegClass	(	const TargetRegisterClass *	A,
		const TargetRegisterClass *	B,
		unsigned	Idx
	)		const

override

getMatchingSuperRegClass - Return a subclass of the specified register class A so that each register in it has a sub-register of the specified sub-register index which is in the specified register class B.

Definition at line 100 of file X86RegisterInfo.cpp.

◆ getNoPreservedMask()

const uint32_t * X86RegisterInfo::getNoPreservedMask ( ) const

override

Definition at line 488 of file X86RegisterInfo.cpp.

Referenced by getMOVL(), and getRetpolineSymbol().

◆ getPointerRegClass()

const TargetRegisterClass * X86RegisterInfo::getPointerRegClass	(	const MachineFunction &	MF,
		unsigned	Kind = `0`
	)		const

override

getPointerRegClass - Returns a TargetRegisterClass used for pointer values.

Definition at line 179 of file X86RegisterInfo.cpp.

References getGPRsForTailCall(), llvm::MachineFunction::getSubtarget(), llvm::X86FrameLowering::hasFP(), llvm::X86Subtarget::isTarget64BitLP64(), llvm_unreachable, and llvm::X86FrameLowering::Uses64BitFramePtr.

◆ getPtrSizedFrameRegister()

unsigned X86RegisterInfo::getPtrSizedFrameRegister ( const MachineFunction & MF ) const

Definition at line 759 of file X86RegisterInfo.cpp.

References getFrameRegister(), llvm::MachineFunction::getSubtarget(), llvm::getX86SubSuperRegister(), and llvm::X86Subtarget::isTarget64BitILP32().

Referenced by llvm::X86TargetLowering::getRegisterByName(), recoverFramePointer(), and X86ChooseCmpImmediateOpcode().

◆ getRegPressureLimit()

unsigned X86RegisterInfo::getRegPressureLimit	(	const TargetRegisterClass *	RC,
		MachineFunction &	MF
	)		const

override

Definition at line 245 of file X86RegisterInfo.cpp.

References llvm::TargetRegisterClass::getID(), and llvm::X86FrameLowering::hasFP().

◆ getReservedRegs()

BitVector X86RegisterInfo::getReservedRegs ( const MachineFunction & MF ) const

override

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 496 of file X86RegisterInfo.cpp.

References assert(), llvm::MachineOperand::clobbersPhysReg(), llvm::SIInstrFlags::DS, getBaseRegister(), llvm::Function::getCallingConv(), getCallPreservedMask(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getSubtarget(), llvm::getX86SubSuperRegister(), llvm::X86Subtarget::hasAVX512(), hasBasePointer(), llvm::X86FrameLowering::hasFP(), I, llvm::MCRegAliasIterator::isValid(), llvm::report_fatal_error(), and llvm::BitVector::set().

◆ getSEHRegNum()

int X86RegisterInfo::getSEHRegNum ( unsigned i ) const

Definition at line 83 of file X86RegisterInfo.cpp.

Referenced by printConstant().

◆ getSlotSize()

unsigned llvm::X86RegisterInfo::getSlotSize ( ) const

inline

Definition at line 142 of file X86RegisterInfo.h.

Referenced by llvm::X86AsmPrinter::EmitInstruction(), llvm::X86FrameLowering::getInitialCFAOffset(), getMOVL(), llvm::X86TargetLowering::getRegisterByName(), llvm::X86TargetLowering::getReturnAddressFrameIndex(), INITIALIZE_PASS(), LowerINTRINSIC_W_CHAIN(), llvm::X86MachineFunctionInfo::setRestoreBasePointer(), and llvm::X86FrameLowering::X86FrameLowering().

◆ getStackRegister()

unsigned llvm::X86RegisterInfo::getStackRegister ( ) const

inline

Definition at line 134 of file X86RegisterInfo.h.

Referenced by computeBytesPoppedByCalleeForSRet(), llvm::X86FrameLowering::getFrameIndexReference(), llvm::X86FrameLowering::getFrameIndexReferenceSP(), getMOVL(), getRetpolineSymbol(), INITIALIZE_PASS(), isFuncletReturnInstr(), llvm::X86FrameLowering::X86FrameLowering(), and llvm::X86TargetLowering::X86TargetLowering().

◆ getSubClassWithSubReg()

const TargetRegisterClass * X86RegisterInfo::getSubClassWithSubReg	(	const TargetRegisterClass *	RC,
		unsigned	Idx
	)		const

override

Definition at line 88 of file X86RegisterInfo.cpp.

◆ hasBasePointer()

bool X86RegisterInfo::hasBasePointer ( const MachineFunction & MF ) const

Definition at line 610 of file X86RegisterInfo.cpp.

References CantUseSP(), EnableBasePointer, and llvm::MachineFunction::getFrameInfo().

Referenced by llvm::X86FrameLowering::canSimplifyCallFramePseudos(), llvm::X86FrameLowering::determineCalleeSaves(), llvm::X86TargetLowering::EmitInstrWithCustomInserter(), llvm::X86FrameLowering::getFrameIndexReference(), getReservedRegs(), getRetpolineSymbol(), recoverFramePointer(), and llvm::X86TargetLowering::ReplaceNodeResults().

◆ hasReservedSpillSlot()

bool X86RegisterInfo::hasReservedSpillSlot	(	const MachineFunction &	MF,
		unsigned	Reg,
		int &	FrameIdx
	)		const

override

Definition at line 644 of file X86RegisterInfo.cpp.

References llvm_unreachable.

◆ trackLivenessAfterRegAlloc()

bool X86RegisterInfo::trackLivenessAfterRegAlloc ( const MachineFunction & MF ) const

override

Code Generation virtual methods...

Definition at line 77 of file X86RegisterInfo.cpp.

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

lib/Target/X86/X86RegisterInfo.h
lib/Target/X86/X86RegisterInfo.cpp

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ X86RegisterInfo()

Member Function Documentation

◆ adjustStackMapLiveOutMask()

◆ canRealignStack()

◆ eliminateFrameIndex()

◆ getBaseRegister()

◆ getCalleeSavedRegs()

◆ getCalleeSavedRegsViaCopy()

◆ getCallPreservedMask()

◆ getCrossCopyRegClass()

◆ getDarwinTLSCallPreservedMask()

◆ getFramePtr()

◆ getFrameRegister()

◆ getGPRsForTailCall()

◆ getLargestLegalSuperClass()

◆ getMatchingSuperRegClass()

◆ getNoPreservedMask()

◆ getPointerRegClass()

◆ getPtrSizedFrameRegister()

◆ getRegPressureLimit()

◆ getReservedRegs()

◆ getSEHRegNum()

◆ getSlotSize()

◆ getStackRegister()

◆ getSubClassWithSubReg()

◆ hasBasePointer()

◆ hasReservedSpillSlot()

◆ trackLivenessAfterRegAlloc()