#include "AArch64FrameLowering.h"
#include "AArch64InstrInfo.h"
#include "AArch64MachineFunctionInfo.h"
#include "AArch64RegisterInfo.h"
#include "AArch64Subtarget.h"
#include "AArch64TargetMachine.h"
#include "MCTargetDesc/AArch64AddressingModes.h"
#include "llvm/ADT/ScopeExit.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/LivePhysRegs.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineMemOperand.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/RegisterScavenging.h"
#include "llvm/CodeGen/TargetInstrInfo.h"
#include "llvm/CodeGen/TargetRegisterInfo.h"
#include "llvm/CodeGen/TargetSubtargetInfo.h"
#include "llvm/CodeGen/WinEHFuncInfo.h"
#include "llvm/IR/Attributes.h"
#include "llvm/IR/CallingConv.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DebugLoc.h"
#include "llvm/IR/Function.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCDwarf.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include <cassert>
#include <cstdint>
#include <iterator>
#include <vector>

Include dependency graph for AArch64FrameLowering.cpp:

Macros
#define	DEBUG_TYPE "frame-info"

#define	CASE(n)

#define	CASE(n)

Functions
	STATISTIC (NumRedZoneFunctions, "Number of functions using red zone")

static int64_t	getArgumentStackToRestore (MachineFunction &MF, MachineBasicBlock &MBB)
	Returns how much of the incoming argument stack area (in bytes) we should clean up in an epilogue. More...

static bool	produceCompactUnwindFrame (MachineFunction &MF)

static bool	needsWinCFI (const MachineFunction &MF)

static StackOffset	getSVEStackSize (const MachineFunction &MF)
	Returns the size of the entire SVE stackframe (calleesaves + spills). More...

static bool	needsShadowCallStackPrologueEpilogue (MachineFunction &MF)

static unsigned	estimateRSStackSizeLimit (MachineFunction &MF)
	Look at each instruction that references stack frames and return the stack size limit beyond which some of these instructions will require a scratch register during their expansion later. More...

static unsigned	getFixedObjectSize (const MachineFunction &MF, const AArch64FunctionInfo *AFI, bool IsWin64, bool IsFunclet)
	Returns the size of the fixed object area (allocated next to sp on entry) On Win64 this may include a var args area and an UnwindHelp object for EH. More...

static void	insertCFISameValue (const MCInstrDesc &Desc, MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator InsertPt, unsigned DwarfReg)

static void	emitCalleeSavedRestores (MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, bool SVE)

static MCRegister	getRegisterOrZero (MCRegister Reg, bool HasSVE)

static unsigned	findScratchNonCalleeSaveRegister (MachineBasicBlock *MBB)

static bool	windowsRequiresStackProbe (MachineFunction &MF, uint64_t StackSizeInBytes)

static MachineBasicBlock::iterator	InsertSEH (MachineBasicBlock::iterator MBBI, const TargetInstrInfo &TII, MachineInstr::MIFlag Flag)

static void	fixupSEHOpcode (MachineBasicBlock::iterator MBBI, unsigned LocalStackSize)

static MachineBasicBlock::iterator	convertCalleeSaveRestoreToSPPrePostIncDec (MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, const DebugLoc &DL, const TargetInstrInfo TII, int CSStackSizeInc, bool NeedsWinCFI, bool HasWinCFI, bool EmitCFI, MachineInstr::MIFlag FrameFlag=MachineInstr::FrameSetup, int CFAOffset=0)

static void	fixupCalleeSaveRestoreStackOffset (MachineInstr &MI, uint64_t LocalStackSize, bool NeedsWinCFI, bool *HasWinCFI)

static bool	isTargetWindows (const MachineFunction &MF)

static bool	IsSVECalleeSave (MachineBasicBlock::iterator I)

static void	emitShadowCallStackPrologue (const TargetInstrInfo &TII, MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, const DebugLoc &DL, bool NeedsWinCFI, bool NeedsUnwindInfo)

static void	emitShadowCallStackEpilogue (const TargetInstrInfo &TII, MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, const DebugLoc &DL)

static void	InsertReturnAddressAuth (MachineFunction &MF, MachineBasicBlock &MBB)

static bool	isFuncletReturnInstr (const MachineInstr &MI)

static StackOffset	getFPOffset (const MachineFunction &MF, int64_t ObjectOffset)

static StackOffset	getStackOffset (const MachineFunction &MF, int64_t ObjectOffset)

static unsigned	getPrologueDeath (MachineFunction &MF, unsigned Reg)

static bool	invalidateWindowsRegisterPairing (unsigned Reg1, unsigned Reg2, bool NeedsWinCFI, bool IsFirst)

static bool	invalidateRegisterPairing (unsigned Reg1, unsigned Reg2, bool UsesWinAAPCS, bool NeedsWinCFI, bool NeedsFrameRecord, bool IsFirst)
	Returns true if Reg1 and Reg2 cannot be paired using a ldp/stp instruction. More...

static void	computeCalleeSaveRegisterPairs (MachineFunction &MF, ArrayRef< CalleeSavedInfo > CSI, const TargetRegisterInfo *TRI, SmallVectorImpl< RegPairInfo > &RegPairs, bool NeedsFrameRecord)

static bool	getSVECalleeSaveSlotRange (const MachineFrameInfo &MFI, int &Min, int &Max)
	returns true if there are any SVE callee saves. More...

static int64_t	determineSVEStackObjectOffsets (MachineFrameInfo &MFI, int &MinCSFrameIndex, int &MaxCSFrameIndex, bool AssignOffsets)

Variables
static cl::opt< bool >	EnableRedZone ("aarch64-redzone", cl::desc("enable use of redzone on AArch64"), cl::init(false), cl::Hidden)

static cl::opt< bool >	ReverseCSRRestoreSeq ("reverse-csr-restore-seq", cl::desc("reverse the CSR restore sequence"), cl::init(false), cl::Hidden)

static cl::opt< bool >	StackTaggingMergeSetTag ("stack-tagging-merge-settag", cl::desc("merge settag instruction in function epilog"), cl::init(true), cl::Hidden)

static cl::opt< bool >	OrderFrameObjects ("aarch64-order-frame-objects", cl::desc("sort stack allocations"), cl::init(true), cl::Hidden)

cl::opt< bool >	EnableHomogeneousPrologEpilog ("homogeneous-prolog-epilog", cl::init(false), cl::ZeroOrMore, cl::Hidden, cl::desc("Emit homogeneous prologue and epilogue for the size " "optimization (default = off)"))

static const unsigned	DefaultSafeSPDisplacement = 255
	This is the biggest offset to the stack pointer we can encode in aarch64 instructions (without using a separate calculation and a temp register). More...

Macro Definition Documentation

◆ CASE [1/2]

#define CASE ( n )

Value:

  case AArch64::W##n:                                                          \
  case AArch64::X##n:                                                          \
    return AArch64::X##n

◆ CASE [2/2]

#define CASE ( n )

Value:

  case AArch64::B##n:                                                          \
  case AArch64::H##n:                                                          \
  case AArch64::S##n:                                                          \
  case AArch64::D##n:                                                          \
  case AArch64::Q##n:                                                          \
    return HasSVE ? AArch64::Z##n : AArch64::Q##n

◆ DEBUG_TYPE

#define DEBUG_TYPE "frame-info"

Definition at line 234 of file AArch64FrameLowering.cpp.

Function Documentation

◆ computeCalleeSaveRegisterPairs()

static void computeCalleeSaveRegisterPairs	(	MachineFunction &	MF,
		ArrayRef< CalleeSavedInfo >	CSI,
		const TargetRegisterInfo *	TRI,
		SmallVectorImpl< RegPairInfo > &	RegPairs,
		bool	NeedsFrameRecord
	)

static

Definition at line 2503 of file AArch64FrameLowering.cpp.

References Align, assert(), contains(), llvm::CallingConv::CXX_FAST_TLS, llvm::ArrayRef< T >::empty(), llvm::AArch64FunctionInfo::getCalleeSavedStackSize(), llvm::Function::getCallingConv(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), llvm::AArch64FunctionInfo::getSVECalleeSavedStackSize(), llvm::AArch64FunctionInfo::hasCalleeSaveStackFreeSpace(), llvm::AArch64FunctionInfo::hasSwiftAsyncContext(), i, invalidateRegisterPairing(), invalidateWindowsRegisterPairing(), isTargetWindows(), llvm_unreachable, needsWinCFI(), llvm::CallingConv::PreserveMost, produceCompactUnwindFrame(), llvm::reverse(), llvm::NVPTX::PTXCvtMode::RPI, llvm::AArch64FunctionInfo::setCalleeSaveBaseToFrameRecordOffset(), and llvm::ArrayRef< T >::size().

Referenced by llvm::AArch64FrameLowering::restoreCalleeSavedRegisters(), and llvm::AArch64FrameLowering::spillCalleeSavedRegisters().

◆ convertCalleeSaveRestoreToSPPrePostIncDec()

static MachineBasicBlock::iterator convertCalleeSaveRestoreToSPPrePostIncDec	(	MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator	MBBI,
		const DebugLoc &	DL,
		const TargetInstrInfo *	TII,
		int	CSStackSizeInc,
		bool	NeedsWinCFI,
		bool *	HasWinCFI,
		bool	EmitCFI,
		MachineInstr::MIFlag	FrameFlag = `MachineInstr::FrameSetup`,
		int	CFAOffset = `0`
	)

static

◆ determineSVEStackObjectOffsets()

static int64_t determineSVEStackObjectOffsets	(	MachineFrameInfo &	MFI,
		int &	MinCSFrameIndex,
		int &	MaxCSFrameIndex,
		bool	AssignOffsets
	)

static

◆ emitCalleeSavedRestores()

static void emitCalleeSavedRestores	(	MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator	MBBI,
		bool	SVE
	)

static

◆ emitShadowCallStackEpilogue()

static void emitShadowCallStackEpilogue	(	const TargetInstrInfo &	TII,
		MachineFunction &	MF,
		MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator	MBBI,
		const DebugLoc &	DL
	)

static

Definition at line 1352 of file AArch64FrameLowering.cpp.

References llvm::MachineInstrBuilder::addCFIIndex(), llvm::MachineFunction::addFrameInst(), llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), llvm::BuildMI(), llvm::MCCFIInstruction::createRestore(), llvm::RegState::Define, DL, llvm::MachineInstr::FrameDestroy, llvm::MachineFunction::getInfo(), MBB, MBBI, llvm::AArch64FunctionInfo::needsAsyncDwarfUnwindInfo(), llvm::MachineInstrBuilder::setMIFlag(), llvm::MachineInstrBuilder::setMIFlags(), and TII.

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

◆ emitShadowCallStackPrologue()

static void emitShadowCallStackPrologue	(	const TargetInstrInfo &	TII,
		MachineFunction &	MF,
		MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator	MBBI,
		const DebugLoc &	DL,
		bool	NeedsWinCFI,
		bool	NeedsUnwindInfo
	)

static

Definition at line 1313 of file AArch64FrameLowering.cpp.

References llvm::MachineInstrBuilder::addCFIIndex(), llvm::MachineFunction::addFrameInst(), llvm::MachineInstrBuilder::addImm(), llvm::MachineBasicBlock::addLiveIn(), llvm::MachineInstrBuilder::addReg(), llvm::BuildMI(), llvm::MCCFIInstruction::createEscape(), llvm::RegState::Define, DL, llvm::MachineInstr::FrameSetup, MBB, MBBI, llvm::MachineInstrBuilder::setMIFlag(), and TII.

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

◆ estimateRSStackSizeLimit()

static unsigned estimateRSStackSizeLimit ( MachineFunction & MF )

static

Look at each instruction that references stack frames and return the stack size limit beyond which some of these instructions will require a scratch register during their expansion later.

Definition at line 349 of file AArch64FrameLowering.cpp.

References llvm::AArch64FrameOffsetCannotUpdate, DefaultSafeSPDisplacement, llvm::isAArch64FrameOffsetLegal(), MBB, and MI.

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

◆ findScratchNonCalleeSaveRegister()

static unsigned findScratchNonCalleeSaveRegister ( MachineBasicBlock * MBB )

static

Definition at line 826 of file AArch64FrameLowering.cpp.

References llvm::LivePhysRegs::addLiveIns(), llvm::LivePhysRegs::addReg(), llvm::LivePhysRegs::available(), llvm::MachineFunction::front(), llvm::MachineRegisterInfo::getCalleeSavedRegs(), llvm::MachineBasicBlock::getParent(), llvm::MachineFunction::getRegInfo(), llvm::AArch64Subtarget::getRegisterInfo(), llvm::MachineFunction::getSubtarget(), i, MBB, MRI, and TRI.

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

◆ fixupCalleeSaveRestoreStackOffset()

static void fixupCalleeSaveRestoreStackOffset	(	MachineInstr &	MI,
		uint64_t	LocalStackSize,
		bool	NeedsWinCFI,
		bool *	HasWinCFI
	)

static

Definition at line 1233 of file AArch64FrameLowering.cpp.

References assert(), fixupSEHOpcode(), llvm::MachineOperand::getImm(), llvm::AArch64InstrInfo::isSEHInstruction(), llvm_unreachable, MBBI, MI, and llvm::MachineOperand::setImm().

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

◆ fixupSEHOpcode()

static void fixupSEHOpcode	(	MachineBasicBlock::iterator	MBBI,
		unsigned	LocalStackSize
	)

static

Definition at line 1097 of file AArch64FrameLowering.cpp.

References llvm::MachineOperand::getImm(), llvm_unreachable, MBBI, and llvm::MachineOperand::setImm().

Referenced by fixupCalleeSaveRestoreStackOffset().

◆ getArgumentStackToRestore()

static int64_t getArgumentStackToRestore	(	MachineFunction &	MF,
		MachineBasicBlock &	MBB
	)

static

Returns how much of the incoming argument stack area (in bytes) we should clean up in an epilogue.

For the C calling convention this will be 0, for guaranteed tail call conventions it can be positive (a normal return or a tail call to a function that uses less stack space for arguments) or negative (for a tail call to a function that needs more stack space than us for arguments).

Definition at line 267 of file AArch64FrameLowering.cpp.

References llvm::MachineBasicBlock::end(), llvm::AArch64FunctionInfo::getArgumentStackToRestore(), llvm::MachineOperand::getImm(), llvm::MachineFunction::getInfo(), llvm::MachineBasicBlock::getLastNonDebugInstr(), MBB, and MBBI.

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

◆ getFixedObjectSize()

static unsigned getFixedObjectSize	(	const MachineFunction &	MF,
		const AArch64FunctionInfo *	AFI,
		bool	IsWin64,
		bool	IsFunclet
	)

static

Returns the size of the fixed object area (allocated next to sp on entry) On Win64 this may include a var args area and an UnwindHelp object for EH.

Definition at line 381 of file AArch64FrameLowering.cpp.

References llvm::alignTo(), llvm::AArch64FunctionInfo::getTailCallReservedStack(), llvm::AArch64FunctionInfo::getVarArgsGPRSize(), llvm::MachineFunction::hasEHFunclets(), and llvm::report_fatal_error().

Referenced by llvm::AArch64FrameLowering::emitEpilogue(), llvm::AArch64FrameLowering::emitPrologue(), getFPOffset(), and llvm::AArch64FrameLowering::processFunctionBeforeFrameFinalized().

◆ getFPOffset()

static StackOffset getFPOffset	(	const MachineFunction &	MF,
		int64_t	ObjectOffset
	)

static

Definition at line 2232 of file AArch64FrameLowering.cpp.

References llvm::AArch64FunctionInfo::getCalleeSaveBaseToFrameRecordOffset(), llvm::AArch64FunctionInfo::getCalleeSavedStackSize(), llvm::Function::getCallingConv(), llvm::StackOffset::getFixed(), getFixedObjectSize(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), and llvm::MachineFunction::getSubtarget().

Referenced by llvm::AArch64FrameLowering::getSEHFrameIndexOffset(), and llvm::AArch64FrameLowering::resolveFrameOffsetReference().

◆ getPrologueDeath()

static unsigned getPrologueDeath	(	MachineFunction &	MF,
		unsigned	Reg
	)

static

Definition at line 2408 of file AArch64FrameLowering.cpp.

References llvm::getKillRegState(), llvm::MachineFunction::getRegInfo(), and llvm::MachineRegisterInfo::isLiveIn().

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

◆ getRegisterOrZero()

static MCRegister getRegisterOrZero	(	MCRegister	Reg,
		bool	HasSVE
	)

static

Definition at line 678 of file AArch64FrameLowering.cpp.

References CASE.

◆ getStackOffset()

static StackOffset getStackOffset	(	const MachineFunction &	MF,
		int64_t	ObjectOffset
	)

static

Definition at line 2246 of file AArch64FrameLowering.cpp.

References llvm::StackOffset::getFixed(), and llvm::MachineFunction::getFrameInfo().

Referenced by llvm::AArch64FrameLowering::getFrameIndexReferencePreferSP(), llvm::AArch64FrameLowering::getSEHFrameIndexOffset(), and llvm::AArch64FrameLowering::resolveFrameOffsetReference().

◆ getSVECalleeSaveSlotRange()

static bool getSVECalleeSaveSlotRange	(	const MachineFrameInfo &	MFI,
		int &	Min,
		int &	Max
	)

static

returns true if there are any SVE callee saves.

Definition at line 3176 of file AArch64FrameLowering.cpp.

References assert(), contains(), llvm::MachineFrameInfo::getCalleeSavedInfo(), llvm::MachineFrameInfo::isCalleeSavedInfoValid(), llvm::max(), and llvm::min().

Referenced by determineSVEStackObjectOffsets().

◆ getSVEStackSize()

static StackOffset getSVEStackSize ( const MachineFunction & MF )

static

Returns the size of the entire SVE stackframe (calleesaves + spills).

Definition at line 398 of file AArch64FrameLowering.cpp.

References llvm::MachineFunction::getInfo(), llvm::StackOffset::getScalable(), and llvm::AArch64FunctionInfo::getStackSizeSVE().

Referenced by llvm::AArch64FrameLowering::canUseRedZone(), llvm::AArch64FrameLowering::emitEpilogue(), llvm::AArch64FrameLowering::emitPrologue(), and llvm::AArch64FrameLowering::resolveFrameOffsetReference().

◆ insertCFISameValue()

static void insertCFISameValue	(	const MCInstrDesc &	Desc,
		MachineFunction &	MF,
		MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator	InsertPt,
		unsigned	DwarfReg
	)

static

Definition at line 584 of file AArch64FrameLowering.cpp.

References llvm::MachineInstrBuilder::addCFIIndex(), llvm::MachineFunction::addFrameInst(), llvm::BuildMI(), llvm::MCCFIInstruction::createSameValue(), and MBB.

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

◆ InsertReturnAddressAuth()

static void InsertReturnAddressAuth	(	MachineFunction &	MF,
		MachineBasicBlock &	MBB
	)

static

◆ InsertSEH()

static MachineBasicBlock::iterator InsertSEH	(	MachineBasicBlock::iterator	MBBI,
		const TargetInstrInfo &	TII,
		MachineInstr::MIFlag	Flag
	)

static

◆ invalidateRegisterPairing()

static bool invalidateRegisterPairing	(	unsigned	Reg1,
		unsigned	Reg2,
		bool	UsesWinAAPCS,
		bool	NeedsWinCFI,
		bool	NeedsFrameRecord,
		bool	IsFirst
	)

static

Returns true if Reg1 and Reg2 cannot be paired using a ldp/stp instruction.

WindowsCFI requires that only consecutive registers can be paired. LR and FP need to be allocated together when the frame needs to save the frame-record. This means any other register pairing with LR is invalid.

Definition at line 2457 of file AArch64FrameLowering.cpp.

References invalidateWindowsRegisterPairing().

Referenced by computeCalleeSaveRegisterPairs().

◆ invalidateWindowsRegisterPairing()

static bool invalidateWindowsRegisterPairing	(	unsigned	Reg1,
		unsigned	Reg2,
		bool	NeedsWinCFI,
		bool	IsFirst
	)

static

Definition at line 2427 of file AArch64FrameLowering.cpp.

Referenced by computeCalleeSaveRegisterPairs(), and invalidateRegisterPairing().

◆ isFuncletReturnInstr()

static bool isFuncletReturnInstr ( const MachineInstr & MI )

static

Definition at line 1881 of file AArch64FrameLowering.cpp.

References llvm::ISD::CATCHRET, llvm::ISD::CLEANUPRET, and MI.

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

◆ IsSVECalleeSave()

static bool IsSVECalleeSave ( MachineBasicBlock::iterator I )

static

Definition at line 1287 of file AArch64FrameLowering.cpp.

References llvm::MachineInstr::FrameDestroy, llvm::MachineInstr::FrameSetup, and I.

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

◆ isTargetWindows()

static bool isTargetWindows ( const MachineFunction & MF )

static

Definition at line 1282 of file AArch64FrameLowering.cpp.

References llvm::MachineFunction::getSubtarget().

Referenced by llvm::AArch64FrameLowering::assignCalleeSavedSpillSlots(), and computeCalleeSaveRegisterPairs().

◆ needsShadowCallStackPrologueEpilogue()

static bool needsShadowCallStackPrologueEpilogue ( MachineFunction & MF )

static

Definition at line 1300 of file AArch64FrameLowering.cpp.

References llvm::any_of(), llvm::MachineFrameInfo::getCalleeSavedInfo(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getSubtarget(), llvm::Function::hasFnAttribute(), Info, llvm::AArch64Subtarget::isXRegisterReserved(), and llvm::report_fatal_error().

Referenced by llvm::AArch64FrameLowering::emitEpilogue(), llvm::AArch64FrameLowering::emitPrologue(), and llvm::AArch64FrameLowering::resetCFIToInitialState().

◆ needsWinCFI()

static bool needsWinCFI ( const MachineFunction & MF )

static

Definition at line 887 of file AArch64FrameLowering.cpp.

References F, llvm::MachineFunction::getFunction(), llvm::TargetMachine::getMCAsmInfo(), llvm::MachineFunction::getTarget(), and llvm::MCAsmInfo::usesWindowsCFI().

Referenced by llvm::AArch64FrameLowering::assignCalleeSavedSpillSlots(), computeCalleeSaveRegisterPairs(), llvm::AArch64FrameLowering::emitEpilogue(), llvm::AArch64FrameLowering::emitPrologue(), llvm::AArch64FrameLowering::restoreCalleeSavedRegisters(), and llvm::AArch64FrameLowering::spillCalleeSavedRegisters().

◆ produceCompactUnwindFrame()

static bool produceCompactUnwindFrame ( MachineFunction & MF )

static

Definition at line 2418 of file AArch64FrameLowering.cpp.

References Attrs, llvm::Function::getAttributes(), llvm::Function::getCallingConv(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getSubtarget(), llvm::AArch64Subtarget::getTargetLowering(), llvm::AArch64Subtarget::isTargetMachO(), llvm::AArch64TargetLowering::supportSwiftError(), and llvm::CallingConv::SwiftTail.

Referenced by computeCalleeSaveRegisterPairs().

◆ STATISTIC()

STATISTIC	(	NumRedZoneFunctions	,
		"Number of functions using red zone"
	)

◆ windowsRequiresStackProbe()

static bool windowsRequiresStackProbe	(	MachineFunction &	MF,
		uint64_t	StackSizeInBytes
	)

static

Definition at line 870 of file AArch64FrameLowering.cpp.

References F, llvm::MachineFunction::getFunction(), llvm::MachineFunction::getSubtarget(), and llvm::AArch64Subtarget::isTargetWindows().

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

Variable Documentation

◆ DefaultSafeSPDisplacement

const unsigned DefaultSafeSPDisplacement = 255

static

This is the biggest offset to the stack pointer we can encode in aarch64 instructions (without using a separate calculation and a temp register).

Note that the exception here are vector stores/loads which cannot encode any displacements (see estimateRSStackSizeLimit(), isAArch64FrameOffsetLegal()).

Definition at line 344 of file AArch64FrameLowering.cpp.

Referenced by estimateRSStackSizeLimit(), and llvm::AArch64FrameLowering::hasFP().

◆ EnableHomogeneousPrologEpilog

cl::opt<bool> EnableHomogeneousPrologEpilog("homogeneous-prolog-epilog", cl::init(false), cl::ZeroOrMore, cl::Hidden, cl::desc("Emit homogeneous prologue and epilogue for the size " "optimization (default = off)"))

◆ EnableRedZone

cl::opt<bool> EnableRedZone("aarch64-redzone", cl::desc("enable use of redzone on AArch64"), cl::init(false), cl::Hidden)

static

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

◆ OrderFrameObjects

cl::opt<bool> OrderFrameObjects("aarch64-order-frame-objects", cl::desc("sort stack allocations"), cl::init(true), cl::Hidden)

static

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

◆ ReverseCSRRestoreSeq

cl::opt<bool> ReverseCSRRestoreSeq("reverse-csr-restore-seq", cl::desc("reverse the CSR restore sequence"), cl::init(false), cl::Hidden)

static

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

◆ StackTaggingMergeSetTag

cl::opt<bool> StackTaggingMergeSetTag("stack-tagging-merge-settag", cl::desc("merge settag instruction in function epilog"), cl::init(true), cl::Hidden)

static

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

Macros

Functions

Variables

Macro Definition Documentation

◆ CASE [1/2]

◆ CASE [2/2]

◆ DEBUG_TYPE

Function Documentation

◆ computeCalleeSaveRegisterPairs()

◆ convertCalleeSaveRestoreToSPPrePostIncDec()

◆ determineSVEStackObjectOffsets()

◆ emitCalleeSavedRestores()

◆ emitShadowCallStackEpilogue()

◆ emitShadowCallStackPrologue()

◆ estimateRSStackSizeLimit()

◆ findScratchNonCalleeSaveRegister()

◆ fixupCalleeSaveRestoreStackOffset()

◆ fixupSEHOpcode()

◆ getArgumentStackToRestore()

◆ getFixedObjectSize()

◆ getFPOffset()

◆ getPrologueDeath()

◆ getRegisterOrZero()

◆ getStackOffset()

◆ getSVECalleeSaveSlotRange()

◆ getSVEStackSize()

◆ insertCFISameValue()

◆ InsertReturnAddressAuth()

◆ InsertSEH()

◆ invalidateRegisterPairing()

◆ invalidateWindowsRegisterPairing()

◆ isFuncletReturnInstr()

◆ IsSVECalleeSave()

◆ isTargetWindows()

◆ needsShadowCallStackPrologueEpilogue()

◆ needsWinCFI()

◆ produceCompactUnwindFrame()

◆ STATISTIC()

◆ windowsRequiresStackProbe()

Variable Documentation

◆ DefaultSafeSPDisplacement

◆ EnableHomogeneousPrologEpilog

◆ EnableRedZone

◆ OrderFrameObjects

◆ ReverseCSRRestoreSeq

◆ StackTaggingMergeSetTag