llvm::X86RegisterInfo Class Reference

#include "Target/X86/X86RegisterInfo.h"

Inheritance diagram for llvm::X86RegisterInfo:

Public Member Functions
	X86RegisterInfo (const Triple &TT)
unsigned	getNumSupportedRegs (const MachineFunction &MF) const override
	Return the number of registers for the function.
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.
const TargetRegisterClass *	getSubClassWithSubReg (const TargetRegisterClass *RC, unsigned Idx) const override
const TargetRegisterClass *	getLargestLegalSuperClass (const TargetRegisterClass *RC, const MachineFunction &MF) const override
bool	shouldRewriteCopySrc (const TargetRegisterClass *DefRC, unsigned DefSubReg, const TargetRegisterClass *SrcRC, unsigned SrcSubReg) const override
const TargetRegisterClass *	getPointerRegClass (const MachineFunction &MF, unsigned Kind=0) const override
	getPointerRegClass - Returns a TargetRegisterClass used for pointer values.
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.
const TargetRegisterClass *	getGPRsForTailCall (const MachineFunction &MF) const
	getGPRsForTailCall - Returns a register class with registers that can be used in forming tail calls.
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.
const MCPhysReg *	getIPRACSRegs (const MachineFunction *MF) const override
	getIPRACSRegs - This API can be removed when rbp is safe to optimized out when IPRA is on.
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.
bool	isArgumentRegister (const MachineFunction &MF, MCRegister Reg) const override
	isArgumentReg - Returns true if Reg can be used as an argument to a function.
bool	isTileRegisterClass (const TargetRegisterClass *RC) const
	Return true if it is tile register class.
bool	isFixedRegister (const MachineFunction &MF, MCRegister PhysReg) const override
	Returns true if PhysReg is a fixed register.
void	adjustStackMapLiveOutMask (uint32_t *Mask) const override
bool	hasBasePointer (const MachineFunction &MF) const
bool	canRealignStack (const MachineFunction &MF) const override
bool	shouldRealignStack (const MachineFunction &MF) const override
void	eliminateFrameIndex (MachineBasicBlock::iterator II, unsigned FIOperandNum, Register BaseReg, int FIOffset) const
bool	eliminateFrameIndex (MachineBasicBlock::iterator MI, int SPAdj, unsigned FIOperandNum, RegScavenger *RS=nullptr) const override
bool	eliminateFrameIndicesBackwards () const override
	Process frame indices in forwards block order because X86InstrInfo::getSPAdjust relies on it when searching for the ADJCALLSTACKUP pseudo following a call.
unsigned	findDeadCallerSavedReg (MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI) const
	findDeadCallerSavedReg - Return a caller-saved register that isn't live when it reaches the "return" instruction.
Register	getFrameRegister (const MachineFunction &MF) const override
unsigned	getPtrSizedFrameRegister (const MachineFunction &MF) const
unsigned	getPtrSizedStackRegister (const MachineFunction &MF) const
Register	getStackRegister () const
Register	getBaseRegister () const
Register	getFramePtr () const
	Returns physical register used as frame pointer.
unsigned	getSlotSize () const
bool	getRegAllocationHints (Register VirtReg, ArrayRef< MCPhysReg > Order, SmallVectorImpl< MCPhysReg > &Hints, const MachineFunction &MF, const VirtRegMap *VRM, const LiveRegMatrix *Matrix) const override

Detailed Description

Definition at line 24 of file X86RegisterInfo.h.

Constructor & Destructor Documentation

X86RegisterInfo()

X86RegisterInfo::X86RegisterInfo ( const Triple &  TT )

explicit

Definition at line 53 of file X86RegisterInfo.cpp.

References llvm::X86_MC::initLLVMToSEHAndCVRegMapping().

Member Function Documentation

adjustStackMapLiveOutMask()

void X86RegisterInfo::adjustStackMapLiveOutMask ( uint32_t *  Mask ) const

override

Definition at line 750 of file X86RegisterInfo.cpp.

References assert().

canRealignStack()

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

override

Definition at line 798 of file X86RegisterInfo.cpp.

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

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

eliminateFrameIndex() [1/2]

void X86RegisterInfo::eliminateFrameIndex	(	MachineBasicBlock::iterator	II,
		unsigned	FIOperandNum,
		Register	BaseReg,
		int	FIOffset
	)		const

Definition at line 864 of file X86RegisterInfo.cpp.

References assert(), llvm::MachineOperand::ChangeToImmediate(), II, MI, and llvm::Offset.

eliminateFrameIndex() [2/2]

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

override

Definition at line 904 of file X86RegisterInfo.cpp.

References assert(), llvm::MachineOperand::ChangeToImmediate(), contains(), llvm::MachineBasicBlock::end(), llvm::MachineBasicBlock::getFirstTerminator(), llvm::StackOffset::getFixed(), llvm::X86FrameLowering::getFrameIndexReference(), llvm::X86FrameLowering::getFrameIndexReferenceSP(), llvm::MachineFunction::getFrameInfo(), llvm::MachineBasicBlock::getParent(), llvm::X86FrameLowering::getWin64EHFrameIndexRef(), llvm::getX86SubSuperRegister(), II, llvm::X86FrameLowering::Is64Bit, llvm::MachineBasicBlock::isEHFuncletEntry(), llvm::MachineFrameInfo::isFixedObjectIndex(), isFuncletReturnInstr(), MBB, MBBI, MI, llvm::Offset, and tryOptimizeLEAtoMOV().

eliminateFrameIndicesBackwards()

bool llvm::X86RegisterInfo::eliminateFrameIndicesBackwards ( ) const

inlineoverride

Process frame indices in forwards block order because X86InstrInfo::getSPAdjust relies on it when searching for the ADJCALLSTACKUP pseudo following a call.

TODO: Fix this and return true like all other targets.

Definition at line 153 of file X86RegisterInfo.h.

findDeadCallerSavedReg()

unsigned X86RegisterInfo::findDeadCallerSavedReg	(	MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator &	MBBI
	)		const

findDeadCallerSavedReg - Return a caller-saved register that isn't live when it reaches the "return" instruction.

We can then pop a stack object to this register without worry about clobbering it.

Definition at line 984 of file X86RegisterInfo.cpp.

References llvm::MachineFunction::callsEHReturn(), llvm::MachineBasicBlock::end(), getGPRsForTailCall(), llvm::MachineBasicBlock::getParent(), llvm::MCRegAliasIterator::isValid(), MBB, MBBI, and Uses.

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

getBaseRegister()

Register llvm::X86RegisterInfo::getBaseRegister ( ) const

inline

Definition at line 166 of file X86RegisterInfo.h.

Referenced by llvm::X86FrameLowering::determineCalleeSaves(), llvm::X86FrameLowering::emitPrologue(), llvm::X86FrameLowering::getFrameIndexReference(), getReservedRegs(), llvm::X86FrameLowering::restoreWin32EHStackPointers(), and llvm::X86FrameLowering::spillFPBP().

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 288 of file X86RegisterInfo.cpp.

References llvm::CallingConv::AnyReg, assert(), llvm::MachineFunction::callsEHReturn(), CC, llvm::CallingConv::CFGuard_Check, 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::HiPE, llvm::CallingConv::Intel_OCL_BI, llvm::CallingConv::PreserveAll, llvm::CallingConv::PreserveMost, llvm::CallingConv::PreserveNone, llvm::X86TargetLowering::supportSwiftError(), llvm::CallingConv::SwiftTail, 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 422 of file X86RegisterInfo.cpp.

References assert(), llvm::CallingConv::CXX_FAST_TLS, llvm::Function::getCallingConv(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), and llvm::X86MachineFunctionInfo::isSplitCSR().

getCallPreservedMask()

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

override

Definition at line 432 of file X86RegisterInfo.cpp.

References llvm::CallingConv::AnyReg, assert(), CC, llvm::CallingConv::CFGuard_Check, llvm::CallingConv::Cold, llvm::CallingConv::CXX_FAST_TLS, F, llvm::MachineFunction::getFunction(), llvm::MachineFunction::getSubtarget(), llvm::X86Subtarget::getTargetLowering(), llvm::CallingConv::GHC, llvm::X86Subtarget::hasAVX(), llvm::X86Subtarget::hasAVX512(), llvm::X86Subtarget::hasSSE1(), llvm::CallingConv::HiPE, llvm::CallingConv::Intel_OCL_BI, llvm::CallingConv::PreserveAll, llvm::CallingConv::PreserveMost, llvm::CallingConv::PreserveNone, llvm::X86TargetLowering::supportSwiftError(), llvm::CallingConv::SwiftTail, llvm::CallingConv::Win64, llvm::CallingConv::X86_64_SysV, llvm::CallingConv::X86_INTR, and llvm::CallingConv::X86_RegCall.

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 257 of file X86RegisterInfo.cpp.

getDarwinTLSCallPreservedMask()

const uint32_t * X86RegisterInfo::getDarwinTLSCallPreservedMask

(

)

const

Definition at line 543 of file X86RegisterInfo.cpp.

getFramePtr()

Register 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 171 of file X86RegisterInfo.h.

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

getFrameRegister()

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

override

Definition at line 1032 of file X86RegisterInfo.cpp.

References llvm::TargetFrameLowering::hasFP().

Referenced by llvm::X86FrameLowering::assignCalleeSavedSpillSlots(), llvm::X86FrameLowering::emitCalleeSavedFrameMoves(), llvm::X86FrameLowering::emitCalleeSavedFrameMovesFullCFA(), llvm::X86FrameLowering::emitEpilogue(), llvm::X86FrameLowering::emitPrologue(), llvm::X86FrameLowering::getFrameIndexReference(), getPtrSizedFrameRegister(), llvm::X86FrameLowering::restoreWin32EHStackPointers(), and llvm::X86FrameLowering::spillFPBP().

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 243 of file X86RegisterInfo.cpp.

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

Referenced by findDeadCallerSavedReg(), and getPointerRegClass().

getIPRACSRegs()

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

override

getIPRACSRegs - This API can be removed when rbp is safe to optimized out when IPRA is on.

Definition at line 418 of file X86RegisterInfo.cpp.

getLargestLegalSuperClass()

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

override

Definition at line 110 of file X86RegisterInfo.cpp.

References llvm::ArrayRef< T >::begin(), llvm::ArrayRef< T >::end(), getRegClass(), llvm::MachineFunction::getSubtarget(), llvm::X86Subtarget::hasAVX512(), I, and llvm::TargetRegisterClass::superclasses().

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 97 of file X86RegisterInfo.cpp.

References A, and B.

getNoPreservedMask()

const uint32_t * X86RegisterInfo::getNoPreservedMask ( ) const

override

Definition at line 539 of file X86RegisterInfo.cpp.

getNumSupportedRegs()

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

override

Return the number of registers for the function.

Definition at line 659 of file X86RegisterInfo.cpp.

References llvm::MachineFunction::getSubtarget().

getPointerRegClass()

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

override

getPointerRegClass - Returns a TargetRegisterClass used for pointer values.

Definition at line 187 of file X86RegisterInfo.cpp.

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

getPtrSizedFrameRegister()

unsigned X86RegisterInfo::getPtrSizedFrameRegister

(

const MachineFunction &

MF

)

const

Definition at line 1038 of file X86RegisterInfo.cpp.

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

Referenced by llvm::X86TargetLowering::getRegisterByName().

getPtrSizedStackRegister()

unsigned X86RegisterInfo::getPtrSizedStackRegister

(

const MachineFunction &

MF

)

const

Definition at line 1047 of file X86RegisterInfo.cpp.

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

getRegAllocationHints()

bool X86RegisterInfo::getRegAllocationHints ( Register  VirtReg, ArrayRef< MCPhysReg >  Order, SmallVectorImpl< MCPhysReg > &  Hints, const MachineFunction &  MF, const VirtRegMap *  VRM, const LiveRegMatrix *  Matrix  ) const

override

Definition at line 1158 of file X86RegisterInfo.cpp.

References assert(), llvm::SmallVectorTemplateCommon< T, typename >::begin(), canHintShape(), llvm::SmallVectorImpl< T >::clear(), llvm::TargetRegisterClass::contains(), llvm::SmallSet< T, N, C >::count(), llvm::dbgs(), DisableRegAllocNDDHints, llvm::SmallVectorTemplateCommon< T, typename >::end(), llvm::format_hex(), llvm::TargetRegisterClass::getID(), llvm::X86::getNonNDVariant(), llvm::VirtRegMap::getPhys(), llvm::TargetRegisterInfo::getRegAllocationHints(), llvm::MachineFunction::getRegInfo(), llvm::MachineFunction::getSubtarget(), getTileShape(), llvm::SmallSet< T, N, C >::insert(), llvm::is_contained(), llvm::Register::isPhysicalRegister(), LLVM_DEBUG, Matrix, MI, MRI, llvm::MCRegister::NoRegister, llvm::SmallVectorTemplateBase< T, bool >::push_back(), and TRI.

getRegPressureLimit()

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

override

Definition at line 268 of file X86RegisterInfo.cpp.

References llvm::TargetRegisterClass::getID(), and llvm::TargetFrameLowering::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 547 of file X86RegisterInfo.cpp.

References assert(), getBaseRegister(), llvm::X86MachineFunctionInfo::getBPClobberedByInvoke(), llvm::Function::getCallingConv(), llvm::MachineFunction::getContext(), llvm::X86MachineFunctionInfo::getFPClobberedByInvoke(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), llvm::MachineFunction::getSubtarget(), llvm::getX86SubSuperRegister(), llvm::CallingConv::GRAAL, llvm::X86Subtarget::hasAVX512(), hasBasePointer(), llvm::TargetFrameLowering::hasFP(), llvm::MCRegAliasIterator::isValid(), llvm::MCContext::reportError(), llvm::Reserved, and SubReg.

getSlotSize()

unsigned llvm::X86RegisterInfo::getSlotSize ( ) const

inline

Definition at line 173 of file X86RegisterInfo.h.

Referenced by llvm::X86AsmPrinter::emitInstruction(), llvm::X86FrameLowering::getInitialCFAOffset(), llvm::X86TargetLowering::getReturnAddressFrameIndex(), llvm::X86MachineFunctionInfo::setRestoreBasePointer(), and llvm::X86FrameLowering::X86FrameLowering().

getStackRegister()

Register llvm::X86RegisterInfo::getStackRegister ( ) const

inline

Definition at line 165 of file X86RegisterInfo.h.

Referenced by llvm::X86FrameLowering::getFrameIndexReference(), llvm::X86FrameLowering::getFrameIndexReferenceSP(), getPtrSizedStackRegister(), llvm::X86FrameLowering::getWin64EHFrameIndexRef(), llvm::X86FrameLowering::X86FrameLowering(), and llvm::X86TargetLowering::X86TargetLowering().

getSubClassWithSubReg()

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

override

Definition at line 85 of file X86RegisterInfo.cpp.

References Idx.

hasBasePointer()

bool X86RegisterInfo::hasBasePointer

(

const MachineFunction &

MF

)

const

Definition at line 774 of file X86RegisterInfo.cpp.

References CantUseSP(), EnableBasePointer, llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getInfo(), llvm::X86MachineFunctionInfo::getStackPtrSaveMI(), and llvm::X86MachineFunctionInfo::hasPreallocatedCall().

Referenced by llvm::X86FrameLowering::canSimplifyCallFramePseudos(), llvm::X86FrameLowering::determineCalleeSaves(), llvm::X86FrameLowering::emitPrologue(), llvm::X86FrameLowering::getFrameIndexReference(), getReservedRegs(), and llvm::X86FrameLowering::spillFPBP().

isArgumentRegister()

bool X86RegisterInfo::isArgumentRegister ( const MachineFunction &  MF, MCRegister  Reg  ) const

override

isArgumentReg - Returns true if Reg can be used as an argument to a function.

Definition at line 689 of file X86RegisterInfo.cpp.

References llvm::any_of(), CC, llvm::Function::getCallingConv(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getSubtarget(), TRI, llvm::CallingConv::Win64, and llvm::CallingConv::X86_64_SysV.

isFixedRegister()

bool X86RegisterInfo::isFixedRegister ( const MachineFunction &  MF, MCRegister  PhysReg  ) const

override

Returns true if PhysReg is a fixed register.

Definition at line 728 of file X86RegisterInfo.cpp.

References llvm::MachineFunction::getSubtarget(), llvm::TargetFrameLowering::hasFP(), and TRI.

isTileRegisterClass()

bool X86RegisterInfo::isTileRegisterClass

(

const TargetRegisterClass *

RC

)

const

Return true if it is tile register class.

Definition at line 745 of file X86RegisterInfo.cpp.

References llvm::TargetRegisterClass::getID().

shouldRealignStack()

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

override

Definition at line 817 of file X86RegisterInfo.cpp.

References llvm::Function::getCallingConv(), llvm::MachineFunction::getFunction(), llvm::TargetRegisterInfo::shouldRealignStack(), and llvm::CallingConv::X86_INTR.

shouldRewriteCopySrc()

bool X86RegisterInfo::shouldRewriteCopySrc ( const TargetRegisterClass *  DefRC, unsigned  DefSubReg, const TargetRegisterClass *  SrcRC, unsigned  SrcSubReg  ) const

override

Definition at line 227 of file X86RegisterInfo.cpp.

References llvm::TargetRegisterClass::hasSuperClassEq(), and llvm::TargetRegisterInfo::shouldRewriteCopySrc().

---

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

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