llvm::AArch64RegisterInfo Class Reference

#include "Target/AArch64/AArch64RegisterInfo.h"

Inheritance diagram for llvm::AArch64RegisterInfo:

Public Member Functions
	AArch64RegisterInfo (const Triple &TT)
int	getSEHRegNum (unsigned i) const
bool	isReservedReg (const MachineFunction &MF, MCRegister Reg) const
bool	isStrictlyReservedReg (const MachineFunction &MF, MCRegister Reg) const
bool	isAnyArgRegReserved (const MachineFunction &MF) const
void	emitReservedArgRegCallError (const MachineFunction &MF) const
void	UpdateCustomCalleeSavedRegs (MachineFunction &MF) const
void	UpdateCustomCallPreservedMask (MachineFunction &MF, const uint32_t **Mask) const
const MCPhysReg *	getCalleeSavedRegs (const MachineFunction *MF) const override
	Code Generation virtual methods...
const MCPhysReg *	getDarwinCalleeSavedRegs (const MachineFunction *MF) const
const MCPhysReg *	getCalleeSavedRegsViaCopy (const MachineFunction *MF) const
const uint32_t *	getCallPreservedMask (const MachineFunction &MF, CallingConv::ID) const override
const uint32_t *	getDarwinCallPreservedMask (const MachineFunction &MF, CallingConv::ID) const
unsigned	getCSRFirstUseCost () const override
const TargetRegisterClass *	getSubClassWithSubReg (const TargetRegisterClass *RC, unsigned Idx) const override
const uint32_t *	getTLSCallPreservedMask () const
const uint32_t *	getSMStartStopCallPreservedMask () const
const uint32_t *	SMEABISupportRoutinesCallPreservedMaskFromX0 () const
const uint32_t *	getNoPreservedMask () const override
const uint32_t *	getCustomEHPadPreservedMask (const MachineFunction &MF) const override
const uint32_t *	getThisReturnPreservedMask (const MachineFunction &MF, CallingConv::ID) const
	getThisReturnPreservedMask - Returns a call preserved mask specific to the case that 'returned' is on an i64 first argument if the calling convention is one that can (partially) model this attribute with a preserved mask (i.e.
const uint32_t *	getWindowsStackProbePreservedMask () const
	Stack probing calls preserve different CSRs to the normal CC.
BitVector	getStrictlyReservedRegs (const MachineFunction &MF) const
BitVector	getReservedRegs (const MachineFunction &MF) const override
std::optional< std::string >	explainReservedReg (const MachineFunction &MF, MCRegister PhysReg) const override
bool	isAsmClobberable (const MachineFunction &MF, MCRegister PhysReg) const override
const TargetRegisterClass *	getPointerRegClass (const MachineFunction &MF, unsigned Kind=0) const override
const TargetRegisterClass *	getCrossCopyRegClass (const TargetRegisterClass *RC) const override
bool	requiresRegisterScavenging (const MachineFunction &MF) const override
bool	useFPForScavengingIndex (const MachineFunction &MF) const override
bool	requiresFrameIndexScavenging (const MachineFunction &MF) const override
bool	needsFrameBaseReg (MachineInstr *MI, int64_t Offset) const override
	needsFrameBaseReg - Returns true if the instruction's frame index reference would be better served by a base register other than FP or SP.
bool	isFrameOffsetLegal (const MachineInstr *MI, Register BaseReg, int64_t Offset) const override
Register	materializeFrameBaseRegister (MachineBasicBlock *MBB, int FrameIdx, int64_t Offset) const override
	Insert defining instruction(s) for BaseReg to be a pointer to FrameIdx at the beginning of the basic block.
void	resolveFrameIndex (MachineInstr &MI, Register BaseReg, int64_t Offset) const override
bool	eliminateFrameIndex (MachineBasicBlock::iterator II, int SPAdj, unsigned FIOperandNum, RegScavenger *RS=nullptr) const override
bool	cannotEliminateFrame (const MachineFunction &MF) const
bool	requiresVirtualBaseRegisters (const MachineFunction &MF) const override
bool	hasBasePointer (const MachineFunction &MF) const
unsigned	getBaseRegister () const
bool	isArgumentRegister (const MachineFunction &MF, MCRegister Reg) const override
Register	getFrameRegister (const MachineFunction &MF) const override
unsigned	getRegPressureLimit (const TargetRegisterClass *RC, MachineFunction &MF) const override
unsigned	getLocalAddressRegister (const MachineFunction &MF) const
bool	regNeedsCFI (unsigned Reg, unsigned &RegToUseForCFI) const
	Return whether the register needs a CFI entry.
bool	shouldCoalesce (MachineInstr *MI, const TargetRegisterClass *SrcRC, unsigned SubReg, const TargetRegisterClass *DstRC, unsigned DstSubReg, const TargetRegisterClass *NewRC, LiveIntervals &LIS) const override
	SrcRC and DstRC will be morphed into NewRC if this returns true.
void	getOffsetOpcodes (const StackOffset &Offset, SmallVectorImpl< uint64_t > &Ops) const override

Detailed Description

Definition at line 26 of file AArch64RegisterInfo.h.

Constructor & Destructor Documentation

AArch64RegisterInfo()

AArch64RegisterInfo::AArch64RegisterInfo

(

const Triple &

TT

)

Definition at line 42 of file AArch64RegisterInfo.cpp.

References llvm::AArch64_MC::initLLVMToCVRegMapping().

Member Function Documentation

cannotEliminateFrame()

bool AArch64RegisterInfo::cannotEliminateFrame

(

const MachineFunction &

MF

)

const

Definition at line 652 of file AArch64RegisterInfo.cpp.

References llvm::MachineFrameInfo::adjustsStack(), llvm::TargetOptions::DisableFramePointerElim(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getTarget(), llvm::MachineFrameInfo::hasVarSizedObjects(), llvm::MachineFrameInfo::isFrameAddressTaken(), and llvm::TargetMachine::Options.

Referenced by llvm::AArch64FrameLowering::determineCalleeSaves().

eliminateFrameIndex()

bool AArch64RegisterInfo::eliminateFrameIndex ( MachineBasicBlock::iterator  II, int  SPAdj, unsigned  FIOperandNum, RegScavenger *  RS = nullptr  ) const

override

Definition at line 837 of file AArch64RegisterInfo.cpp.

References llvm::AArch64FrameOffsetCanUpdate, llvm::AArch64FrameOffsetIsLegal, llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), assert(), llvm::BuildMI(), llvm::MachineOperand::ChangeToImmediate(), createScratchRegisterForInstruction(), llvm::MachineRegisterInfo::createVirtualRegister(), llvm::emitFrameOffset(), llvm::StackOffset::getFixed(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getInfo(), llvm::AArch64FrameLowering::getNonLocalFrameIndexReference(), llvm::MachineFrameInfo::getObjectOffset(), llvm::MachineBasicBlock::getParent(), llvm::MachineFunction::getRegInfo(), llvm::MachineFrameInfo::getStackSize(), llvm::MachineFunction::getSubtarget(), llvm::AArch64FunctionInfo::getTaggedBasePointerOffset(), llvm::MachineFrameInfo::hasVarSizedObjects(), llvm::isAArch64FrameOffsetLegal(), llvm::RegScavenger::isScavengingFrameIndex(), MBB, MI, llvm::AArch64II::MO_TAGGED, llvm::Offset, llvm::AArch64FrameLowering::resolveFrameIndexReference(), llvm::rewriteAArch64FrameIndex(), and TII.

emitReservedArgRegCallError()

void AArch64RegisterInfo::emitReservedArgRegCallError

(

const MachineFunction &

MF

)

const

Definition at line 478 of file AArch64RegisterInfo.cpp.

References F, and llvm::MachineFunction::getFunction().

explainReservedReg()

std::optional< std::string > AArch64RegisterInfo::explainReservedReg ( const MachineFunction &  MF, MCRegister  PhysReg  ) const

override

Definition at line 375 of file AArch64RegisterInfo.cpp.

References llvm::AArch64InstPrinter::getRegisterName(), llvm::MachineFunction::getSubtarget(), hasBasePointer(), llvm::AArch64Subtarget::isWindowsArm64EC(), and llvm::MCRegisterInfo::regsOverlap().

getBaseRegister()

unsigned AArch64RegisterInfo::getBaseRegister

(

)

const

Definition at line 510 of file AArch64RegisterInfo.cpp.

Referenced by llvm::AArch64FrameLowering::determineCalleeSaves(), and getLocalAddressRegister().

getCalleeSavedRegs()

const MCPhysReg * AArch64RegisterInfo::getCalleeSavedRegs ( const MachineFunction *  MF ) const

override

Code Generation virtual methods...

Definition at line 71 of file AArch64RegisterInfo.cpp.

References llvm::CallingConv::AArch64_SME_ABI_Support_Routines_PreserveMost_From_X0, llvm::CallingConv::AArch64_SME_ABI_Support_Routines_PreserveMost_From_X2, llvm::CallingConv::AArch64_SVE_VectorCall, llvm::CallingConv::AArch64_VectorCall, llvm::CallingConv::AnyReg, assert(), llvm::CallingConv::CFGuard_Check, llvm::Function::getAttributes(), llvm::Function::getCallingConv(), getDarwinCalleeSavedRegs(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), llvm::MachineFunction::getSubtarget(), llvm::AArch64Subtarget::getTargetLowering(), llvm::CallingConv::GHC, llvm::AttributeList::hasAttrSomewhere(), llvm::AArch64FunctionInfo::isSVECC(), llvm::AArch64Subtarget::isTargetDarwin(), llvm::AArch64Subtarget::isTargetWindows(), llvm::CallingConv::PreserveAll, llvm::CallingConv::PreserveMost, llvm::report_fatal_error(), llvm::AArch64TargetLowering::supportSwiftError(), llvm::CallingConv::SwiftTail, and llvm::CallingConv::Win64.

Referenced by UpdateCustomCalleeSavedRegs().

getCalleeSavedRegsViaCopy()

const MCPhysReg * AArch64RegisterInfo::getCalleeSavedRegsViaCopy

(

const MachineFunction *

MF

)

const

Definition at line 180 of file AArch64RegisterInfo.cpp.

References assert(), llvm::CallingConv::CXX_FAST_TLS, llvm::Function::getCallingConv(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), and llvm::AArch64FunctionInfo::isSplitCSR().

getCallPreservedMask()

const uint32_t * AArch64RegisterInfo::getCallPreservedMask ( const MachineFunction &  MF, CallingConv::ID  CC  ) const

override

Definition at line 258 of file AArch64RegisterInfo.cpp.

References llvm::CallingConv::AArch64_SME_ABI_Support_Routines_PreserveMost_From_X0, llvm::CallingConv::AArch64_SME_ABI_Support_Routines_PreserveMost_From_X2, llvm::CallingConv::AArch64_SVE_VectorCall, llvm::CallingConv::AArch64_VectorCall, llvm::CallingConv::AnyReg, CC, llvm::CallingConv::CFGuard_Check, llvm::Function::getAttributes(), getDarwinCallPreservedMask(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getSubtarget(), llvm::AArch64Subtarget::getTargetLowering(), llvm::CallingConv::GHC, llvm::AttributeList::hasAttrSomewhere(), llvm::Function::hasFnAttribute(), llvm::AArch64Subtarget::isTargetDarwin(), llvm::CallingConv::PreserveAll, llvm::CallingConv::PreserveMost, llvm::report_fatal_error(), llvm::AArch64TargetLowering::supportSwiftError(), and llvm::CallingConv::SwiftTail.

getCrossCopyRegClass()

const TargetRegisterClass * AArch64RegisterInfo::getCrossCopyRegClass ( const TargetRegisterClass *  RC ) const

override

Definition at line 504 of file AArch64RegisterInfo.cpp.

getCSRFirstUseCost()

unsigned llvm::AArch64RegisterInfo::getCSRFirstUseCost ( ) const

inlineoverride

Definition at line 56 of file AArch64RegisterInfo.h.

getCustomEHPadPreservedMask()

const uint32_t * AArch64RegisterInfo::getCustomEHPadPreservedMask ( const MachineFunction &  MF ) const

override

Definition at line 306 of file AArch64RegisterInfo.cpp.

References llvm::MachineFunction::getSubtarget(), and llvm::AArch64Subtarget::isTargetLinux().

getDarwinCalleeSavedRegs()

const MCPhysReg * AArch64RegisterInfo::getDarwinCalleeSavedRegs

(

const MachineFunction *

MF

)

const

Definition at line 135 of file AArch64RegisterInfo.cpp.

References llvm::CallingConv::AArch64_SME_ABI_Support_Routines_PreserveMost_From_X0, llvm::CallingConv::AArch64_SME_ABI_Support_Routines_PreserveMost_From_X2, llvm::CallingConv::AArch64_SVE_VectorCall, llvm::CallingConv::AArch64_VectorCall, assert(), llvm::CallingConv::CFGuard_Check, llvm::CallingConv::CXX_FAST_TLS, llvm::Function::getAttributes(), llvm::Function::getCallingConv(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), llvm::MachineFunction::getSubtarget(), llvm::AArch64Subtarget::getTargetLowering(), llvm::AttributeList::hasAttrSomewhere(), llvm::AArch64Subtarget::isTargetDarwin(), llvm::CallingConv::PreserveAll, llvm::CallingConv::PreserveMost, llvm::report_fatal_error(), llvm::AArch64TargetLowering::supportSwiftError(), llvm::CallingConv::SwiftTail, and llvm::CallingConv::Win64.

Referenced by getCalleeSavedRegs().

getDarwinCallPreservedMask()

const uint32_t * AArch64RegisterInfo::getDarwinCallPreservedMask	(	const MachineFunction &	MF,
		CallingConv::ID	CC
	)		const

Definition at line 220 of file AArch64RegisterInfo.cpp.

References llvm::CallingConv::AArch64_SME_ABI_Support_Routines_PreserveMost_From_X0, llvm::CallingConv::AArch64_SME_ABI_Support_Routines_PreserveMost_From_X2, llvm::CallingConv::AArch64_SVE_VectorCall, llvm::CallingConv::AArch64_VectorCall, assert(), CC, llvm::CallingConv::CFGuard_Check, llvm::CallingConv::CXX_FAST_TLS, llvm::Function::getAttributes(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getSubtarget(), llvm::AArch64Subtarget::getTargetLowering(), llvm::AttributeList::hasAttrSomewhere(), llvm::AArch64Subtarget::isTargetDarwin(), llvm::CallingConv::PreserveAll, llvm::CallingConv::PreserveMost, llvm::report_fatal_error(), llvm::AArch64TargetLowering::supportSwiftError(), and llvm::CallingConv::SwiftTail.

Referenced by getCallPreservedMask().

getFrameRegister()

Register AArch64RegisterInfo::getFrameRegister ( const MachineFunction &  MF ) const

override

Definition at line 613 of file AArch64RegisterInfo.cpp.

References llvm::AArch64FrameLowering::hasFP().

Referenced by getLocalAddressRegister().

getLocalAddressRegister()

unsigned AArch64RegisterInfo::getLocalAddressRegister

(

const MachineFunction &

MF

)

const

Definition at line 975 of file AArch64RegisterInfo.cpp.

References getBaseRegister(), llvm::MachineFunction::getFrameInfo(), getFrameRegister(), and llvm::MachineFunction::hasEHFunclets().

getNoPreservedMask()

const uint32_t * AArch64RegisterInfo::getNoPreservedMask ( ) const

override

Definition at line 350 of file AArch64RegisterInfo.cpp.

getOffsetOpcodes()

void AArch64RegisterInfo::getOffsetOpcodes ( const StackOffset &  Offset, SmallVectorImpl< uint64_t > &  Ops  ) const

override

Definition at line 810 of file AArch64RegisterInfo.cpp.

References llvm::SmallVectorImpl< T >::append(), llvm::DIExpression::appendOffset(), assert(), getDwarfRegNum(), llvm::Offset, and llvm::SmallVectorTemplateBase< T, bool >::push_back().

getPointerRegClass()

const TargetRegisterClass * AArch64RegisterInfo::getPointerRegClass ( const MachineFunction &  MF, unsigned  Kind = 0  ) const

override

Definition at line 498 of file AArch64RegisterInfo.cpp.

getRegPressureLimit()

unsigned AArch64RegisterInfo::getRegPressureLimit ( const TargetRegisterClass *  RC, MachineFunction &  MF  ) const

override

Definition at line 930 of file AArch64RegisterInfo.cpp.

References llvm::TargetRegisterClass::getID(), llvm::AArch64Subtarget::getNumXRegisterReserved(), llvm::MachineFunction::getSubtarget(), hasBasePointer(), llvm::AArch64FrameLowering::hasFP(), and llvm::Triple::isOSDarwin().

getReservedRegs()

BitVector AArch64RegisterInfo::getReservedRegs ( const MachineFunction &  MF ) const

override

Definition at line 450 of file AArch64RegisterInfo.cpp.

References assert(), getStrictlyReservedRegs(), llvm::MachineFunction::getSubtarget(), llvm::AArch64Subtarget::isXRegisterReservedForRA(), and llvm::Reserved.

Referenced by isReservedReg().

getSEHRegNum()

int llvm::AArch64RegisterInfo::getSEHRegNum ( unsigned  i ) const

inline

Definition at line 33 of file AArch64RegisterInfo.h.

getSMStartStopCallPreservedMask()

const uint32_t * AArch64RegisterInfo::getSMStartStopCallPreservedMask

(

)

const

Definition at line 341 of file AArch64RegisterInfo.cpp.

getStrictlyReservedRegs()

BitVector AArch64RegisterInfo::getStrictlyReservedRegs

(

const MachineFunction &

MF

)

const

Definition at line 402 of file AArch64RegisterInfo.cpp.

References assert(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getSubtarget(), hasBasePointer(), llvm::Function::hasFnAttribute(), llvm::AArch64FrameLowering::hasFP(), llvm::Triple::isOSDarwin(), llvm::AArch64Subtarget::isWindowsArm64EC(), llvm::AArch64Subtarget::isXRegisterReserved(), llvm::Reserved, and SubReg.

Referenced by getReservedRegs(), and isStrictlyReservedReg().

getSubClassWithSubReg()

const TargetRegisterClass * AArch64RegisterInfo::getSubClassWithSubReg ( const TargetRegisterClass *  RC, unsigned  Idx  ) const

override

Definition at line 207 of file AArch64RegisterInfo.cpp.

References Idx.

getThisReturnPreservedMask()

const uint32_t * AArch64RegisterInfo::getThisReturnPreservedMask	(	const MachineFunction &	MF,
		CallingConv::ID	CC
	)		const

getThisReturnPreservedMask - Returns a call preserved mask specific to the case that 'returned' is on an i64 first argument if the calling convention is one that can (partially) model this attribute with a preserved mask (i.e.

it is a calling convention that uses the same register for the first i64 argument and an i64 return value)

Should return NULL in the case that the calling convention does not have this property

Definition at line 355 of file AArch64RegisterInfo.cpp.

References assert(), CC, llvm::MachineFunction::getSubtarget(), llvm::CallingConv::GHC, and llvm::AArch64Subtarget::isTargetDarwin().

getTLSCallPreservedMask()

const uint32_t * AArch64RegisterInfo::getTLSCallPreservedMask

(

)

const

Definition at line 314 of file AArch64RegisterInfo.cpp.

References assert(), llvm::Triple::isOSBinFormatELF(), and llvm::Triple::isOSDarwin().

getWindowsStackProbePreservedMask()

const uint32_t * AArch64RegisterInfo::getWindowsStackProbePreservedMask

(

)

const

Stack probing calls preserve different CSRs to the normal CC.

Definition at line 370 of file AArch64RegisterInfo.cpp.

hasBasePointer()

bool AArch64RegisterInfo::hasBasePointer

(

const MachineFunction &

MF

)

const

Definition at line 512 of file AArch64RegisterInfo.cpp.

References llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getInfo(), llvm::MachineFrameInfo::getLocalFrameSize(), llvm::AArch64FunctionInfo::getStackSizeSVE(), llvm::MachineFunction::getSubtarget(), llvm::AArch64FunctionInfo::hasCalculatedStackSizeSVE(), llvm::MachineFunction::hasEHFunclets(), and llvm::MachineFrameInfo::hasVarSizedObjects().

Referenced by llvm::AArch64FrameLowering::determineCalleeSaves(), explainReservedReg(), getRegPressureLimit(), and getStrictlyReservedRegs().

isAnyArgRegReserved()

bool AArch64RegisterInfo::isAnyArgRegReserved

(

const MachineFunction &

MF

)

const

Definition at line 472 of file AArch64RegisterInfo.cpp.

References llvm::any_of(), and isStrictlyReservedReg().

isArgumentRegister()

bool AArch64RegisterInfo::isArgumentRegister ( const MachineFunction &  MF, MCRegister  Reg  ) const

override

Definition at line 548 of file AArch64RegisterInfo.cpp.

References llvm::CallingConv::AArch64_SME_ABI_Support_Routines_PreserveMost_From_X0, llvm::CallingConv::AArch64_SME_ABI_Support_Routines_PreserveMost_From_X2, llvm::CallingConv::AArch64_SVE_VectorCall, llvm::CallingConv::AArch64_VectorCall, llvm::CallingConv::C, CC, llvm::CallingConv::CFGuard_Check, llvm::CallingConv::CXX_FAST_TLS, llvm::CallingConv::Fast, llvm::Function::getCallingConv(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getSubtarget(), llvm::CallingConv::GHC, llvm::is_contained(), llvm::AArch64Subtarget::isCallingConvWin64(), llvm::AArch64Subtarget::isTargetDarwin(), llvm::AArch64Subtarget::isTargetILP32(), llvm::AArch64Subtarget::isTargetWindows(), llvm::CallingConv::PreserveAll, llvm::CallingConv::PreserveMost, llvm::report_fatal_error(), llvm::CallingConv::Swift, llvm::CallingConv::SwiftTail, llvm::CallingConv::Tail, llvm::CallingConv::WebKit_JS, and llvm::CallingConv::Win64.

isAsmClobberable()

bool AArch64RegisterInfo::isAsmClobberable ( const MachineFunction &  MF, MCRegister  PhysReg  ) const

override

Definition at line 485 of file AArch64RegisterInfo.cpp.

References llvm::MachineFunction::getFunction(), llvm::Function::hasFnAttribute(), isReservedReg(), and llvm::MCRegisterInfo::regsOverlap().

isFrameOffsetLegal()

bool AArch64RegisterInfo::isFrameOffsetLegal ( const MachineInstr *  MI, Register  BaseReg, int64_t  Offset  ) const

override

Definition at line 727 of file AArch64RegisterInfo.cpp.

References llvm::AArch64FrameOffsetIsLegal, assert(), llvm::StackOffset::getFixed(), llvm::isAArch64FrameOffsetLegal(), MI, and llvm::Offset.

Referenced by needsFrameBaseReg().

isReservedReg()

bool AArch64RegisterInfo::isReservedReg	(	const MachineFunction &	MF,
		MCRegister	Reg
	)		const

Definition at line 462 of file AArch64RegisterInfo.cpp.

References getReservedRegs().

Referenced by llvm::AArch64FrameLowering::determineCalleeSaves(), and isAsmClobberable().

isStrictlyReservedReg()

bool AArch64RegisterInfo::isStrictlyReservedReg	(	const MachineFunction &	MF,
		MCRegister	Reg
	)		const

Definition at line 467 of file AArch64RegisterInfo.cpp.

References getStrictlyReservedRegs().

Referenced by isAnyArgRegReserved().

materializeFrameBaseRegister()

Register AArch64RegisterInfo::materializeFrameBaseRegister ( MachineBasicBlock *  MBB, int  FrameIdx, int64_t  Offset  ) const

override

Insert defining instruction(s) for BaseReg to be a pointer to FrameIdx at the beginning of the basic block.

Definition at line 738 of file AArch64RegisterInfo.cpp.

References llvm::MachineInstrBuilder::addFrameIndex(), llvm::MachineInstrBuilder::addImm(), llvm::MachineBasicBlock::begin(), llvm::BuildMI(), DL, llvm::MachineBasicBlock::end(), llvm::MachineBasicBlock::getParent(), llvm::MachineFunction::getRegInfo(), llvm::AArch64_AM::getShifterImm(), llvm::MachineFunction::getSubtarget(), llvm::AArch64_AM::LSL, MBB, MRI, llvm::Offset, and TII.

needsFrameBaseReg()

bool AArch64RegisterInfo::needsFrameBaseReg ( MachineInstr *  MI, int64_t  Offset  ) const

override

needsFrameBaseReg - Returns true if the instruction's frame index reference would be better served by a base register other than FP or SP.

Used by LocalStackFrameAllocation to determine which frame index references it should create new base registers for.

Definition at line 663 of file AArch64RegisterInfo.cpp.

References assert(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFrameInfo::getLocalFrameSize(), llvm::AArch64FrameLowering::hasFP(), isFrameOffsetLegal(), MI, and llvm::Offset.

regNeedsCFI()

bool AArch64RegisterInfo::regNeedsCFI	(	unsigned	Reg,
		unsigned &	RegToUseForCFI
	)		const

Return whether the register needs a CFI entry.

Not all unwinders may know about SVE registers, so we assume the lowest common denominator, i.e. the callee-saves required by the base ABI. For the SVE registers z8-z15 only the lower 64-bits (d8-d15) need to be saved. The lower 64-bits subreg is returned in RegToUseForCFI.

Definition at line 52 of file AArch64RegisterInfo.cpp.

References contains(), and I.

requiresFrameIndexScavenging()

bool AArch64RegisterInfo::requiresFrameIndexScavenging ( const MachineFunction &  MF ) const

override

Definition at line 646 of file AArch64RegisterInfo.cpp.

requiresRegisterScavenging()

bool AArch64RegisterInfo::requiresRegisterScavenging ( const MachineFunction &  MF ) const

override

Definition at line 618 of file AArch64RegisterInfo.cpp.

requiresVirtualBaseRegisters()

bool AArch64RegisterInfo::requiresVirtualBaseRegisters ( const MachineFunction &  MF ) const

override

Definition at line 623 of file AArch64RegisterInfo.cpp.

resolveFrameIndex()

void AArch64RegisterInfo::resolveFrameIndex ( MachineInstr &  MI, Register  BaseReg, int64_t  Offset  ) const

override

Definition at line 762 of file AArch64RegisterInfo.cpp.

References assert(), llvm::Done, llvm::StackOffset::getFixed(), llvm::MachineFunction::getSubtarget(), MI, llvm::Offset, llvm::rewriteAArch64FrameIndex(), and TII.

shouldCoalesce()

bool AArch64RegisterInfo::shouldCoalesce ( MachineInstr *  MI, const TargetRegisterClass *  SrcRC, unsigned  SubReg, const TargetRegisterClass *  DstRC, unsigned  DstSubReg, const TargetRegisterClass *  NewRC, LiveIntervals &  LIS  ) const

override

SrcRC and DstRC will be morphed into NewRC if this returns true.

Definition at line 986 of file AArch64RegisterInfo.cpp.

References llvm::TargetRegisterClass::getID(), and MI.

SMEABISupportRoutinesCallPreservedMaskFromX0()

const uint32_t * AArch64RegisterInfo::SMEABISupportRoutinesCallPreservedMaskFromX0

(

)

const

Definition at line 346 of file AArch64RegisterInfo.cpp.

UpdateCustomCalleeSavedRegs()

void AArch64RegisterInfo::UpdateCustomCalleeSavedRegs

(

MachineFunction &

MF

)

const

Definition at line 189 of file AArch64RegisterInfo.cpp.

References getCalleeSavedRegs(), llvm::MachineFunction::getRegInfo(), llvm::MachineFunction::getSubtarget(), I, llvm::AArch64Subtarget::isXRegCustomCalleeSaved(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), and llvm::MachineRegisterInfo::setCalleeSavedRegs().

UpdateCustomCallPreservedMask()

void AArch64RegisterInfo::UpdateCustomCallPreservedMask	(	MachineFunction &	MF,
		const uint32_t **	Mask
	)		const

Definition at line 322 of file AArch64RegisterInfo.cpp.

References llvm::MachineFunction::allocateRegMask(), llvm::MachineOperand::getRegMaskSize(), llvm::MachineFunction::getSubtarget(), llvm::AArch64Subtarget::isXRegCustomCalleeSaved(), and SubReg.

useFPForScavengingIndex()

bool AArch64RegisterInfo::useFPForScavengingIndex ( const MachineFunction &  MF ) const

override

Definition at line 629 of file AArch64RegisterInfo.cpp.

References assert(), llvm::MachineFunction::getInfo(), llvm::AArch64FunctionInfo::getStackSizeSVE(), llvm::MachineFunction::getSubtarget(), llvm::AArch64FunctionInfo::hasCalculatedStackSizeSVE(), and llvm::AArch64FrameLowering::hasFP().

---

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

• lib/Target/AArch64/AArch64RegisterInfo.h
• lib/Target/AArch64/AArch64RegisterInfo.cpp