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#include "Target/PowerPC/PPCFrameLowering.h"

Inheritance diagram for llvm::PPCFrameLowering:

Public Member Functions
	PPCFrameLowering (const PPCSubtarget &STI)

uint64_t	determineFrameLayoutAndUpdate (MachineFunction &MF,bool UseEstimate=false)const
	Determine the frame layout and update the machine function.

uint64_t	determineFrameLayout (const MachineFunction &MF,bool UseEstimate=false,unsigned *NewMaxCallFrameSize=nullptr)const
	Determine the frame layout but do not update the machine function.

void	emitPrologue (MachineFunction &MF,MachineBasicBlock &MBB)const override
	emitProlog/emitEpilog - These methods insert prolog and epilog code into the function.

void	emitEpilogue (MachineFunction &MF,MachineBasicBlock &MBB)const override

void	inlineStackProbe (MachineFunction &MF,MachineBasicBlock &PrologMBB)const override
	Replace a StackProbe stub (if any) with the actual probe code inline.

bool	needsFP (const MachineFunction &MF)const

void	replaceFPWithRealFP (MachineFunction &MF)const

void	determineCalleeSaves (MachineFunction &MF,BitVector &SavedRegs,RegScavenger *RS=nullptr)const override
	This method determines which of the registers reported byTargetRegisterInfo::getCalleeSavedRegs() should actually get saved.

void	processFunctionBeforeFrameFinalized (MachineFunction &MF,RegScavenger *RS=nullptr)const override
	processFunctionBeforeFrameFinalized - This method is called immediately before the specified function's frame layout (MF.getFrameInfo()) is finalized.

void	addScavengingSpillSlot (MachineFunction &MF,RegScavenger *RS)const

bool	spillCalleeSavedRegisters (MachineBasicBlock &MBB,MachineBasicBlock::iterator MI,ArrayRef<CalleeSavedInfo > CSI,const TargetRegisterInfo *TRI)const override
	spillCalleeSavedRegisters - Issues instruction(s) to spill all callee saved registers and returns true if it isn't possible / profitable to do so by issuing a series of store instructions via storeRegToStackSlot().

bool	assignCalleeSavedSpillSlots (MachineFunction &MF,const TargetRegisterInfo *TRI, std::vector<CalleeSavedInfo > &CSI)const override
	This function will assign callee saved gprs to volatile vector registers for prologue spills when applicable.

MachineBasicBlock::iterator	eliminateCallFramePseudoInstr (MachineFunction &MF,MachineBasicBlock &MBB,MachineBasicBlock::iterator I)const override
	This method is called during prolog/epilog code insertion to eliminate call frame setup and destroy pseudo instructions (but only if theTarget is using them).

bool	restoreCalleeSavedRegisters (MachineBasicBlock &MBB,MachineBasicBlock::iterator MI,MutableArrayRef<CalleeSavedInfo > CSI,const TargetRegisterInfo *TRI)const override
	restoreCalleeSavedRegisters - Issues instruction(s) to restore all callee saved registers and returns true if it isn't possible / profitable to do so by issuing a series of load instructions via loadRegToStackSlot().

bool	targetHandlesStackFrameRounding ()const override
	targetHandlesStackFrameRounding - Returns true if the target is responsible for rounding up the stack frame (probably at emitPrologue time).

uint64_t	getReturnSaveOffset ()const
	getReturnSaveOffset - Return the previous frame offset to save the return address.

uint64_t	getTOCSaveOffset ()const
	getTOCSaveOffset - Return the previous frame offset to save the TOC register – 64-bit SVR4 ABI only.

uint64_t	getFramePointerSaveOffset ()const
	getFramePointerSaveOffset - Return the previous frame offset to save the frame pointer.

uint64_t	getBasePointerSaveOffset ()const
	getBasePointerSaveOffset - Return the previous frame offset to save the base pointer.

unsigned	getLinkageSize ()const
	getLinkageSize - Return the size of the PowerPC ABI linkage area.

const SpillSlot *	getCalleeSavedSpillSlots (unsigned &NumEntries)const override
	getCalleeSavedSpillSlots - This method returns a pointer to an array of pairs, that contains an entry for each callee saved register that must be spilled to a particular stack location if it is spilled.

bool	enableShrinkWrapping (const MachineFunction &MF)const override
	Returns true if the target will correctly handle shrink wrapping.

bool	canUseAsPrologue (const MachineBasicBlock &MBB)const override
	Methods used by shrink wrapping to determine if MBB can be used for the function prologue/epilogue.

bool	canUseAsEpilogue (const MachineBasicBlock &MBB)const override
	Check whether or not the given`MBB` can be used as a epilogue for the target.

void	updateCalleeSaves (const MachineFunction &MF,BitVector &SavedRegs)const

uint64_t	getStackThreshold ()const override
	getStackThreshold - Return the maximum stack size

Public Member Functions inherited fromllvm::TargetFrameLowering
	TargetFrameLowering (StackDirection D,Align StackAl, int LAO,Align TransAl=Align(1),bool StackReal=true)

virtual	~TargetFrameLowering ()

StackDirection	getStackGrowthDirection ()const
	getStackGrowthDirection - Return the direction the stack grows

unsigned	getStackAlignment ()const
	getStackAlignment - This method returns the number of bytes to which the stack pointer must be aligned on entry to a function.

Align	getStackAlign ()const
	getStackAlignment - This method returns the number of bytes to which the stack pointer must be aligned on entry to a function.

virtualuint64_t	getStackThreshold ()const
	getStackThreshold - Return the maximum stack size

int	alignSPAdjust (int SPAdj)const
	alignSPAdjust - This method aligns the stack adjustment to the correct alignment.

Align	getTransientStackAlign ()const
	getTransientStackAlignment - This method returns the number of bytes to which the stack pointer must be aligned at all times, even between calls.

bool	isStackRealignable ()const
	isStackRealignable - This method returns whether the stack can be realigned.

virtualbool	isStackIdSafeForLocalArea (unsigned StackId)const
	This method returns whether or not it is safe for an object with the given stack id to be bundled into the local area.

int	getOffsetOfLocalArea ()const
	getOffsetOfLocalArea - This method returns the offset of the local area from the stack pointer on entrance to a function.

virtualbool	allocateScavengingFrameIndexesNearIncomingSP (const MachineFunction &MF)const
	Control the placement of special register scavenging spill slots when allocating a stack frame.

virtualbool	assignCalleeSavedSpillSlots (MachineFunction &MF,const TargetRegisterInfo *TRI, std::vector<CalleeSavedInfo > &CSI,unsigned &MinCSFrameIndex,unsigned &MaxCSFrameIndex)const
	assignCalleeSavedSpillSlots - Allows target to override spill slot assignment logic.

virtualbool	assignCalleeSavedSpillSlots (MachineFunction &MF,const TargetRegisterInfo *TRI, std::vector<CalleeSavedInfo > &CSI)const

virtualconst SpillSlot *	getCalleeSavedSpillSlots (unsigned &NumEntries)const
	getCalleeSavedSpillSlots - This method returns a pointer to an array of pairs, that contains an entry for each callee saved register that must be spilled to a particular stack location if it is spilled.

virtualbool	targetHandlesStackFrameRounding ()const
	targetHandlesStackFrameRounding - Returns true if the target is responsible for rounding up the stack frame (probably at emitPrologue time).

virtualbool	enableShrinkWrapping (const MachineFunction &MF)const
	Returns true if the target will correctly handle shrink wrapping.

virtualbool	enableStackSlotScavenging (const MachineFunction &MF)const
	Returns true if the stack slot holes in the fixed and callee-save stack area should be used when allocating other stack locations to reduce stack size.

virtualbool	enableCalleeSaveSkip (const MachineFunction &MF)const
	Returns true if the target can safely skip saving callee-saved registers for noreturn nounwind functions.

virtual void	emitPrologue (MachineFunction &MF,MachineBasicBlock &MBB)const =0
	emitProlog/emitEpilog - These methods insert prolog and epilog code into the function.

virtual void	emitEpilogue (MachineFunction &MF,MachineBasicBlock &MBB)const =0

virtual void	emitZeroCallUsedRegs (BitVector RegsToZero,MachineBasicBlock &MBB)const
	emitZeroCallUsedRegs - Zeros out call used registers.

virtual void	emitCalleeSavedFrameMovesFullCFA (MachineBasicBlock &MBB,MachineBasicBlock::iterator MBBI)const
	With basic block sections, emit callee saved frame moves for basic blocks that are in a different section.

virtualbool	enableCFIFixup (MachineFunction &MF)const
	Returns true if we may need to fix the unwind information for the function.

virtual void	resetCFIToInitialState (MachineBasicBlock &MBB)const
	Emit CFI instructions that recreate the state of the unwind information upon fucntion entry.

virtual void	inlineStackProbe (MachineFunction &MF,MachineBasicBlock &PrologueMBB)const
	Replace a StackProbe stub (if any) with the actual probe code inline.

virtualbool	stackProbeFunctionModifiesSP ()const
	Does the stack probe function call return with a modified stack pointer?

virtual void	adjustForSegmentedStacks (MachineFunction &MF,MachineBasicBlock &PrologueMBB)const
	Adjust the prologue to have the function use segmented stacks.

virtual void	adjustForHiPEPrologue (MachineFunction &MF,MachineBasicBlock &PrologueMBB)const
	Adjust the prologue to add Erlang Run-Time System (ERTS) specific code in the assembly prologue to explicitly handle the stack.

virtualbool	spillCalleeSavedRegisters (MachineBasicBlock &MBB,MachineBasicBlock::iterator MI,ArrayRef<CalleeSavedInfo > CSI,const TargetRegisterInfo *TRI)const
	spillCalleeSavedRegisters - Issues instruction(s) to spill all callee saved registers and returns true if it isn't possible / profitable to do so by issuing a series of store instructions via storeRegToStackSlot().

virtualbool	restoreCalleeSavedRegisters (MachineBasicBlock &MBB,MachineBasicBlock::iterator MI,MutableArrayRef<CalleeSavedInfo > CSI,const TargetRegisterInfo *TRI)const
	restoreCalleeSavedRegisters - Issues instruction(s) to restore all callee saved registers and returns true if it isn't possible / profitable to do so by issuing a series of load instructions via loadRegToStackSlot().

bool	hasFP (const MachineFunction &MF)const
	hasFP - Return true if the specified function should have a dedicated frame pointer register.

virtualbool	hasReservedCallFrame (const MachineFunction &MF)const
	hasReservedCallFrame - Under normal circumstances, when a frame pointer is not required, we reserve argument space for call sites in the function immediately on entry to the current function.

virtualbool	canSimplifyCallFramePseudos (const MachineFunction &MF)const
	canSimplifyCallFramePseudos - When possible, it's best to simplify the call frame pseudo ops before doing frame index elimination.

virtualbool	needsFrameIndexResolution (const MachineFunction &MF)const

virtualStackOffset	getFrameIndexReference (const MachineFunction &MF, int FI,Register &FrameReg)const
	getFrameIndexReference - This method should return the base register and offset used to reference a frame index location.

virtualStackOffset	getFrameIndexReferencePreferSP (const MachineFunction &MF, int FI,Register &FrameReg,bool IgnoreSPUpdates)const
	Same as`getFrameIndexReference`, except that the stack pointer (as opposed to the frame pointer) will be the preferred value for`FrameReg`.

virtualStackOffset	getNonLocalFrameIndexReference (const MachineFunction &MF, int FI)const
	getNonLocalFrameIndexReference - This method returns the offset used to reference a frame index location.

virtualStackOffset	getFrameIndexReferenceFromSP (const MachineFunction &MF, int FI)const
	getFrameIndexReferenceFromSP - This method returns the offset from the stack pointer to the slot of the specified index.

virtual void	getCalleeSaves (const MachineFunction &MF,BitVector &SavedRegs)const
	Returns the callee-saved registers as computed by determineCalleeSaves in theBitVector`SavedRegs`.

virtual void	determineCalleeSaves (MachineFunction &MF,BitVector &SavedRegs,RegScavenger *RS=nullptr)const
	This method determines which of the registers reported byTargetRegisterInfo::getCalleeSavedRegs() should actually get saved.

virtual void	processFunctionBeforeFrameFinalized (MachineFunction &MF,RegScavenger *RS=nullptr)const
	processFunctionBeforeFrameFinalized - This method is called immediately before the specified function's frame layout (MF.getFrameInfo()) is finalized.

virtual void	processFunctionBeforeFrameIndicesReplaced (MachineFunction &MF,RegScavenger *RS=nullptr)const
	processFunctionBeforeFrameIndicesReplaced - This method is called immediately before MO_FrameIndex operands are eliminated, but after the frame is finalized.

virtualunsigned	getWinEHParentFrameOffset (const MachineFunction &MF)const

virtualMachineBasicBlock::iterator	eliminateCallFramePseudoInstr (MachineFunction &MF,MachineBasicBlock &MBB,MachineBasicBlock::iterator MI)const
	This method is called during prolog/epilog code insertion to eliminate call frame setup and destroy pseudo instructions (but only if theTarget is using them).

virtual void	orderFrameObjects (const MachineFunction &MF,SmallVectorImpl< int > &objectsToAllocate)const
	Order the symbols in the local stack frame.

virtualbool	canUseAsPrologue (const MachineBasicBlock &MBB)const
	Check whether or not the given`MBB` can be used as a prologue for the target.

virtualbool	canUseAsEpilogue (const MachineBasicBlock &MBB)const
	Check whether or not the given`MBB` can be used as a epilogue for the target.

virtualTargetStackID::Value	getStackIDForScalableVectors ()const
	Returns the StackID that scalable vectors should be associated with.

virtualbool	isSupportedStackID (TargetStackID::Value ID)const

virtualbool	isProfitableForNoCSROpt (const Function &F)const
	Check if the no-CSR optimisation is profitable for the given function.

virtual int	getInitialCFAOffset (const MachineFunction &MF)const
	Return initial CFA offset value i.e.

virtualRegister	getInitialCFARegister (const MachineFunction &MF)const
	Return initial CFA register value i.e.

virtualDwarfFrameBase	getDwarfFrameBase (const MachineFunction &MF)const
	Return the frame base information to be encoded in the DWARF subprogram debug info.

virtual void	spillFPBP (MachineFunction &MF)const
	If frame pointer or base pointer is clobbered by an instruction, we should spill/restore it around that instruction.

virtual void	emitRemarks (const MachineFunction &MF,MachineOptimizationRemarkEmitter *ORE)const
	This method is called at the end of prolog/epilog code insertion, so targets can emit remarks based on the final frame layout.

Protected Member Functions
bool	hasFPImpl (const MachineFunction &MF)const override

virtualbool	hasFPImpl (const MachineFunction &MF)const =0

Additional Inherited Members
Public Types inherited fromllvm::TargetFrameLowering
enum	StackDirection {StackGrowsUp,StackGrowsDown }

Static Public Member Functions inherited fromllvm::TargetFrameLowering
staticbool	isSafeForNoCSROpt (const Function &F)
	Check if given function is safe for not having callee saved registers.

Detailed Description

Definition at line22 of filePPCFrameLowering.h.

Constructor & Destructor Documentation

◆ PPCFrameLowering()

PPCFrameLowering::PPCFrameLowering

(

const PPCSubtarget &

STI

)

Definition at line82 of filePPCFrameLowering.cpp.

Member Function Documentation

◆ addScavengingSpillSlot()

void PPCFrameLowering::addScavengingSpillSlot	(	MachineFunction &	MF,
		RegScavenger *	RS
	)		const

Definition at line2286 of filePPCFrameLowering.cpp.

Referencesllvm::RegScavenger::addScavengingFrameIndex(),llvm::MachineFrameInfo::CreateSpillStackObject(),determineFrameLayout(),llvm::MachineFunction::getFrameInfo(),llvm::MachineFrameInfo::getMaxAlign(),llvm::PPCSubtarget::getRegisterInfo(),llvm::TargetFrameLowering::getStackAlign(),hasNonRISpills(),hasSpills(),llvm::MachineFrameInfo::hasVarSizedObjects(),llvm::PPCSubtarget::isPPC64(),Size,spillsCR(), andTRI.

Referenced byprocessFunctionBeforeFrameFinalized().

◆ assignCalleeSavedSpillSlots()

bool PPCFrameLowering::assignCalleeSavedSpillSlots	(	MachineFunction &	MF,
		const TargetRegisterInfo *	TRI,
		std::vector<CalleeSavedInfo > &	CSI
	)		const

overridevirtual

This function will assign callee saved gprs to volatile vector registers for prologue spills when applicable.

It returns false if there are any registers which were not spilled to volatile vector registers.

Reimplemented fromllvm::TargetFrameLowering.

Definition at line2330 of filePPCFrameLowering.cpp.

Referencescontains(),EnablePEVectorSpills,llvm::BitVector::find_first(),llvm::PPCRegisterInfo::getCalleeSavedRegs(),llvm::MachineFunction::getFrameInfo(),llvm::MachineFunction::getRegInfo(),llvm::PPCSubtarget::getRegisterInfo(),llvm::MachineFrameInfo::hasCalls(),llvm::Lower,MRI,llvm::BitVector::none(),llvm::BitVector::reset(),llvm::BitVector::set(),llvm::BitVector::set_bits(),llvm::BitVector::size(), andTRI.

◆ canUseAsEpilogue()

bool PPCFrameLowering::canUseAsEpilogue

(

const MachineBasicBlock &

MBB

)

const

overridevirtual

Check whether or not the givenMBB can be used as a epilogue for the target.

The epilogue will be inserted before the first terminator of that block. This method is used by the shrink-wrapping pass to decide ifMBB will be correctly handled by the target. As soon as the target enable shrink-wrapping without overriding this method, we assume that each basic block is a valid epilogue.

Reimplemented fromllvm::TargetFrameLowering.

Definition at line558 of filePPCFrameLowering.cpp.

ReferencesMBB.

◆ canUseAsPrologue()

bool PPCFrameLowering::canUseAsPrologue

(

const MachineBasicBlock &

MBB

)

const

overridevirtual

Methods used by shrink wrapping to determine if MBB can be used for the function prologue/epilogue.

Reimplemented fromllvm::TargetFrameLowering.

Definition at line551 of filePPCFrameLowering.cpp.

ReferencesMBB.

◆ determineCalleeSaves()

void PPCFrameLowering::determineCalleeSaves	(	MachineFunction &	MF,
		BitVector &	SavedRegs,
		RegScavenger *	RS =`nullptr`
	)		const

overridevirtual

This method determines which of the registers reported byTargetRegisterInfo::getCalleeSavedRegs() should actually get saved.

The default implementation checks populates theSavedRegs bitset with all registers which are modified in the function, targets may override this function to save additional registers. This method also sets up the register scavenger ensuring there is a free register or a frameindex available. This method should not be called by any passes outside of PEI, because it may change state passed in byMF andRS. The preferred interface outside PEI is getCalleeSaves.

Reimplemented fromllvm::TargetFrameLowering.

Definition at line1970 of filePPCFrameLowering.cpp.

Referencesassert(),llvm::MachineFrameInfo::CreateFixedObject(),llvm::TargetFrameLowering::determineCalleeSaves(),llvm::PPCFunctionInfo::getBasePointerSaveIndex(),getBasePointerSaveOffset(),llvm::PPCRegisterInfo::getBaseRegister(),llvm::MachineFunction::getFrameInfo(),llvm::PPCFunctionInfo::getFramePointerSaveIndex(),getFramePointerSaveOffset(),llvm::MachineFunction::getInfo(),llvm::PPCSubtarget::getRegisterInfo(),llvm::PPCFunctionInfo::getTailCallSPDelta(),llvm::MachineFunction::getTarget(),llvm::TargetOptions::GuaranteedTailCallOpt,llvm::PPCRegisterInfo::hasBasePointer(),llvm::PPCSubtarget::isAIXABI(),llvm::PPCSubtarget::isPPC64(),MustSaveLR(),needsFP(),llvm::TargetMachine::Options,llvm::BitVector::reset(),llvm::BitVector::set(),llvm::PPCFunctionInfo::setBasePointerSaveIndex(),llvm::PPCFunctionInfo::setCRSpillFrameIndex(),llvm::PPCFunctionInfo::setFramePointerSaveIndex(),llvm::PPCFunctionInfo::setMustSaveLR(),llvm::PPCFunctionInfo::setPICBasePointerSaveIndex(),llvm::BitVector::test(),updateCalleeSaves(), andllvm::PPCFunctionInfo::usesPICBase().

◆ determineFrameLayout()

uint64_t PPCFrameLowering::determineFrameLayout	(	const MachineFunction &	MF,
		bool	UseEstimate =`false`,
		unsigned *	NewMaxCallFrameSize =`nullptr`
	)		const

Determine the frame layout but do not update the machine function.

determineFrameLayout - Determine the size of the frame and maximum call frame size.

TheMachineFunction object can be const in this case as it is not modified.

Definition at line297 of filePPCFrameLowering.cpp.

Referencesllvm::MachineFrameInfo::adjustsStack(),llvm::alignTo(),llvm::MachineFrameInfo::estimateStackSize(),llvm::MachineFunction::getFrameInfo(),llvm::MachineFunction::getFunction(),llvm::MachineFunction::getInfo(),getLinkageSize(),llvm::MachineFrameInfo::getMaxAlign(),llvm::MachineFrameInfo::getMaxCallFrameSize(),llvm::PPCSubtarget::getRedZoneSize(),llvm::PPCSubtarget::getRegisterInfo(),llvm::TargetFrameLowering::getStackAlign(),llvm::MachineFrameInfo::getStackSize(),llvm::PPCRegisterInfo::hasBasePointer(),llvm::Function::hasFnAttribute(),llvm::MachineFrameInfo::hasVarSizedObjects(),llvm::MachineFrameInfo::isFrameAddressTaken(),MustSaveLR(), andllvm::PPCFunctionInfo::mustSaveTOC().

Referenced byaddScavengingSpillSlot(),determineFrameLayoutAndUpdate(), andllvm::PPCRegisterInfo::needsFrameBaseReg().

◆ determineFrameLayoutAndUpdate()

uint64_t PPCFrameLowering::determineFrameLayoutAndUpdate	(	MachineFunction &	MF,
		bool	UseEstimate =`false`
	)		const

Determine the frame layout and update the machine function.

determineFrameLayoutAndUpdate - Determine the size of the frame and maximum call frame size.

Update theMachineFunction object with the stack size.

Definition at line284 of filePPCFrameLowering.cpp.

ReferencesdetermineFrameLayout(),llvm::MachineFunction::getFrameInfo(),llvm::MachineFrameInfo::setMaxCallFrameSize(), andllvm::MachineFrameInfo::setStackSize().

Referenced byemitPrologue().

◆ eliminateCallFramePseudoInstr()

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

overridevirtual

This method is called during prolog/epilog code insertion to eliminate call frame setup and destroy pseudo instructions (but only if theTarget is using them).

It is responsible for eliminating these instructions, replacing them with concrete instructions. This method need only be implemented if using call frame setup/destroy pseudo instructions. Returns an iterator pointing to the instruction after the replaced one.

Reimplemented fromllvm::TargetFrameLowering.

Definition at line2561 of filePPCFrameLowering.cpp.

Referencesllvm::MachineInstrBuilder::addImm(),llvm::MachineInstrBuilder::addReg(),llvm::BuildMI(),llvm::MachineBasicBlock::erase(),llvm::PPCSubtarget::getInstrInfo(),llvm::MachineFunction::getTarget(),llvm::TargetOptions::GuaranteedTailCallOpt,I,is64Bit(),llvm::PPCSubtarget::isPPC64(),llvm::RegState::Kill,MBB,MBBI,llvm::TargetMachine::Options, andTII.

◆ emitEpilogue()

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

overridevirtual

Implementsllvm::TargetFrameLowering.

Definition at line1542 of filePPCFrameLowering.cpp.

Referencesllvm::MachineInstrBuilder::addImm(),llvm::MachineInstrBuilder::addReg(),assert(),llvm::BuildMI(),llvm::SmallVectorBase< Size_T >::empty(),llvm::MachineBasicBlock::end(),llvm::MachineFunction::exposesReturnsTwice(),llvm::CallingConv::Fast,FPReg,llvm::PPCFunctionInfo::getBasePointerSaveIndex(),llvm::PPCRegisterInfo::getBaseRegister(),llvm::MachineFrameInfo::getCalleeSavedInfo(),llvm::Function::getCallingConv(),llvm::MachineBasicBlock::getFirstTerminator(),llvm::MachineFunction::getFrameInfo(),llvm::PPCFunctionInfo::getFramePointerSaveIndex(),llvm::MachineFunction::getFunction(),llvm::MachineOperand::getImm(),llvm::MachineFunction::getInfo(),llvm::PPCSubtarget::getInstrInfo(),llvm::getKillRegState(),llvm::PPCFunctionInfo::getMinReservedArea(),llvm::PPCFunctionInfo::getMustSaveCRs(),llvm::MachineFrameInfo::getObjectOffset(),llvm::PPCFunctionInfo::getPICBasePointerSaveIndex(),llvm::PPCSubtarget::getRegisterInfo(),getReturnSaveOffset(),llvm::PPCFunctionInfo::getROPProtectionHashSaveIndex(),llvm::MachineFrameInfo::getStackSize(),llvm::PPCFunctionInfo::getTailCallSPDelta(),llvm::MachineFunction::getTarget(),llvm::TargetOptions::GuaranteedTailCallOpt,llvm::PPCRegisterInfo::hasBasePointer(),llvm::PPCFunctionInfo::hasFastCall(),llvm::TargetFrameLowering::hasFP(),llvm::MachineFrameInfo::hasVarSizedObjects(),Info,llvm::MachineFrameInfo::isFixedObjectIndex(),llvm::MachineOperand::isImm(),llvm::PPCSubtarget::isPPC64(),llvm::PPCSubtarget::isSVR4ABI(),llvm::RegState::Kill,MBB,MBBI,llvm::PPCFunctionInfo::mustSaveLR(),MustSaveLR(),llvm::TargetMachine::Options,llvm::SmallVectorBase< Size_T >::size(),SPReg,TII, andllvm::PPCFunctionInfo::usesPICBase().

◆ emitPrologue()

void PPCFrameLowering::emitPrologue	(	MachineFunction &	MF,
		MachineBasicBlock &	MBB
	)		const

overridevirtual

emitProlog/emitEpilog - These methods insert prolog and epilog code into the function.

Implementsllvm::TargetFrameLowering.

Definition at line608 of filePPCFrameLowering.cpp.

Referencesllvm::MachineInstrBuilder::addCFIIndex(),llvm::MachineInstrBuilder::addDef(),llvm::MachineFunction::addFrameInst(),llvm::MachineInstrBuilder::addImm(),llvm::MachineInstrBuilder::addReg(),assert(),llvm::MachineBasicBlock::begin(),llvm::BuildMI(),llvm::MCCFIInstruction::cfiDefCfaOffset(),contains(),llvm::MCCFIInstruction::createDefCfaRegister(),llvm::MCCFIInstruction::createOffset(),llvm::MCCFIInstruction::createRegister(),determineFrameLayoutAndUpdate(),llvm::SmallVectorBase< Size_T >::empty(),FPReg,llvm::PPCFunctionInfo::getBasePointerSaveIndex(),llvm::PPCRegisterInfo::getBaseRegister(),llvm::MachineFrameInfo::getCalleeSavedInfo(),llvm::MachineFunction::getContext(),llvm::MachineFunction::getFrameInfo(),llvm::PPCFunctionInfo::getFramePointerSaveIndex(),llvm::MachineFunction::getInfo(),llvm::PPCSubtarget::getInstrInfo(),llvm::getKillRegState(),llvm::MachineFrameInfo::getMaxAlign(),llvm::PPCFunctionInfo::getMustSaveCRs(),llvm::MachineFrameInfo::getObjectOffset(),llvm::PPCFunctionInfo::getPICBasePointerSaveIndex(),llvm::MCContext::getRegisterInfo(),llvm::PPCSubtarget::getRegisterInfo(),getReturnSaveOffset(),llvm::PPCFunctionInfo::getROPProtectionHashSaveIndex(),llvm::PPCTargetLowering::getStackProbeSize(),llvm::PPCSubtarget::getTargetLowering(),llvm::PPCRegisterInfo::hasBasePointer(),llvm::TargetFrameLowering::hasFP(),llvm::PPCTargetLowering::hasInlineStackProbe(),I,llvm::RegState::ImplicitKill,Info,llvm::PPCSubtarget::isAIXABI(),llvm::PPCSubtarget::isELFv2ABI(),llvm::MachineFrameInfo::isFixedObjectIndex(),llvm::MachineFrameInfo::isFrameAddressTaken(),llvm::PPCSubtarget::isPPC64(),llvm::PPCSubtarget::isSVR4ABI(),llvm::RegState::Kill,llvm_unreachable,llvm::Log2(),MBB,MBBI,MRI,llvm::PPCFunctionInfo::mustSaveLR(),MustSaveLR(),llvm::PPCFunctionInfo::mustSaveTOC(),llvm::MachineFunction::needsFrameMoves(),llvm::Offset,replaceFPWithRealFP(),llvm::MachineFrameInfo::setObjectOffset(),llvm::SmallVectorBase< Size_T >::size(),SPReg,TII, andllvm::PPCFunctionInfo::usesPICBase().

◆ enableShrinkWrapping()

bool PPCFrameLowering::enableShrinkWrapping

(

const MachineFunction &

)

const

overridevirtual

Returns true if the target will correctly handle shrink wrapping.

Reimplemented fromllvm::TargetFrameLowering.

Definition at line2737 of filePPCFrameLowering.cpp.

Referencesllvm::MachineFunction::getInfo(),llvm::MachineFunction::getSubtarget(), andllvm::PPCFunctionInfo::shrinkWrapDisabled().

◆ getBasePointerSaveOffset()

uint64_t PPCFrameLowering::getBasePointerSaveOffset

(

)

const

getBasePointerSaveOffset - Return the previous frame offset to save the base pointer.

Definition at line2733 of filePPCFrameLowering.cpp.

Referenced bydetermineCalleeSaves().

◆ getCalleeSavedSpillSlots()

const PPCFrameLowering::SpillSlot * PPCFrameLowering::getCalleeSavedSpillSlots

(

unsigned &

NumEntries

)

const

overridevirtual

getCalleeSavedSpillSlots - This method returns a pointer to an array of pairs, that contains an entry for each callee saved register that must be spilled to a particular stack location if it is spilled.

Each entry in this array contains a <register,offset> pair, indicating the fixed offset from the incoming stack pointer that each register should be spilled at. If a register is not listed here, the code generator is allowed to spill it anywhere it chooses.

Reimplemented fromllvm::TargetFrameLowering.

Definition at line93 of filePPCFrameLowering.cpp.

Referencesassert(),CALLEE_SAVED_FPRS,CALLEE_SAVED_GPRS32,CALLEE_SAVED_GPRS64,CALLEE_SAVED_VRS,llvm::PPCSubtarget::is32BitELFABI(),llvm::PPCSubtarget::is64BitELFABI(),llvm::PPCSubtarget::isAIXABI(), andllvm::PPCSubtarget::isPPC64().

◆ getFramePointerSaveOffset()

uint64_t PPCFrameLowering::getFramePointerSaveOffset

(

)

const

getFramePointerSaveOffset - Return the previous frame offset to save the frame pointer.

Definition at line2729 of filePPCFrameLowering.cpp.

Referenced bydetermineCalleeSaves().

◆ getLinkageSize()

unsigned llvm::PPCFrameLowering::getLinkageSize

(

)

const

inline

getLinkageSize - Return the size of the PowerPC ABI linkage area.

Definition at line164 of filePPCFrameLowering.h.

Referenced bydetermineFrameLayout(),mapArgRegToOffsetAIX(), andneedStackSlotPassParameters().

◆ getReturnSaveOffset()

uint64_t llvm::PPCFrameLowering::getReturnSaveOffset

(

)

const

inline

getReturnSaveOffset - Return the previous frame offset to save the return address.

Definition at line148 of filePPCFrameLowering.h.

Referenced byemitEpilogue(), andemitPrologue().

◆ getStackThreshold()

uint64_t PPCFrameLowering::getStackThreshold

(

)

const

overridevirtual

getStackThreshold - Return the maximum stack size

Reimplemented fromllvm::TargetFrameLowering.

Definition at line2808 of filePPCFrameLowering.cpp.

Referencesllvm::TargetFrameLowering::getStackThreshold(), andllvm::PPCSubtarget::isPPC64().

◆ getTOCSaveOffset()

uint64_t PPCFrameLowering::getTOCSaveOffset

(

)

const

getTOCSaveOffset - Return the previous frame offset to save the TOC register – 64-bit SVR4 ABI only.

Definition at line2725 of filePPCFrameLowering.cpp.

Referenced bybuildCallOperands(), andllvm::PPCInstrInfo::isTOCSaveMI().

◆ hasFPImpl()

bool PPCFrameLowering::hasFPImpl

(

const MachineFunction &

)

const

overrideprotectedvirtual

Implementsllvm::TargetFrameLowering.

Definition at line360 of filePPCFrameLowering.cpp.

Referencesllvm::MachineFunction::getFrameInfo(),llvm::MachineFrameInfo::getStackSize(), andneedsFP().

◆ inlineStackProbe()

void PPCFrameLowering::inlineStackProbe	(	MachineFunction &	MF,
		MachineBasicBlock &	PrologueMBB
	)		const

overridevirtual

Replace a StackProbe stub (if any) with the actual probe code inline.

Reimplemented fromllvm::TargetFrameLowering.

Definition at line1238 of filePPCFrameLowering.cpp.

Referencesllvm::MachineInstrBuilder::addCFIIndex(),llvm::MachineFunction::addFrameInst(),llvm::MachineInstrBuilder::addImm(),llvm::MachineInstrBuilder::addMBB(),llvm::MachineInstrBuilder::addReg(),llvm::MachineBasicBlock::addSuccessor(),assert(),llvm::MachineBasicBlock::begin(),buildDefCFAReg(),llvm::BuildMI(),llvm::MCCFIInstruction::cfiDefCfa(),llvm::MCCFIInstruction::createDefCfaRegister(),llvm::MachineFunction::CreateMachineBasicBlock(),DL,llvm::MachineBasicBlock::end(),llvm::find_if(),llvm::MachineBasicBlock::findDebugLoc(),FPReg,llvm::fullyRecomputeLiveIns(),llvm::PPCRegisterInfo::getBaseRegister(),llvm::MachineBasicBlock::getBasicBlock(),llvm::MachineFunction::getContext(),llvm::MachineFunction::getFrameInfo(),llvm::PPCSubtarget::getInstrInfo(),llvm::ilist_node_impl< OptionsT >::getIterator(),llvm::MachineFrameInfo::getMaxAlign(),llvm::MachineBasicBlock::getParent(),llvm::PPCSubtarget::getRedZoneSize(),llvm::MCContext::getRegisterInfo(),llvm::PPCSubtarget::getRegisterInfo(),llvm::PPCTargetLowering::getStackProbeSize(),llvm::PPCSubtarget::getTargetLowering(),llvm::PPCRegisterInfo::hasBasePointer(),llvm::MachineFunction::insert(),llvm::PPCSubtarget::isAIXABI(),llvm::isPowerOf2_64(),llvm::PPCSubtarget::isPPC64(),llvm::PPCSubtarget::isSVR4ABI(),llvm::RegState::Kill,llvm::Log2(),MBB,MBBI,MI,MRI,llvm::MachineFunction::needsFrameMoves(),llvm::Offset,llvm::PPC::PRED_GE,llvm::PPC::PRED_LT,llvm::MachineBasicBlock::splice(),SPReg,TII, andllvm::MachineBasicBlock::transferSuccessorsAndUpdatePHIs().

◆ needsFP()

bool PPCFrameLowering::needsFP

(

const MachineFunction &

)

const

Definition at line371 of filePPCFrameLowering.cpp.

Referencesllvm::TargetOptions::DisableFramePointerElim(),llvm::MachineFunction::exposesReturnsTwice(),llvm::MachineFunction::getFrameInfo(),llvm::MachineFunction::getFunction(),llvm::MachineFunction::getInfo(),llvm::MachineFunction::getTarget(),llvm::TargetOptions::GuaranteedTailCallOpt,llvm::Function::hasFnAttribute(),llvm::MachineFrameInfo::hasPatchPoint(),llvm::MachineFrameInfo::hasStackMap(),llvm::MachineFrameInfo::hasVarSizedObjects(), andllvm::TargetMachine::Options.

Referenced bydetermineCalleeSaves(),hasFPImpl(),processFunctionBeforeFrameFinalized(),replaceFPWithRealFP(), andrestoreCalleeSavedRegisters().

◆ processFunctionBeforeFrameFinalized()

void PPCFrameLowering::processFunctionBeforeFrameFinalized	(	MachineFunction &	MF,
		RegScavenger *	RS =`nullptr`
	)		const

overridevirtual

processFunctionBeforeFrameFinalized - This method is called immediately before the specified function's frame layout (MF.getFrameInfo()) is finalized.

Once the frame is finalized, MO_FrameIndex operands are replaced with direct constants. This method is optional.

Reimplemented fromllvm::TargetFrameLowering.

Definition at line2071 of filePPCFrameLowering.cpp.

ReferencesaddScavengingSpillSlot(),assert(),contains(),llvm::PPCFunctionInfo::getBasePointerSaveIndex(),llvm::PPCRegisterInfo::getBaseRegister(),llvm::MachineFrameInfo::getCalleeSavedInfo(),llvm::MachineFunction::getFrameInfo(),llvm::PPCFunctionInfo::getFramePointerSaveIndex(),llvm::MachineFunction::getInfo(),llvm::MachineFrameInfo::getObjectOffset(),llvm::PPCFunctionInfo::getPICBasePointerSaveIndex(),llvm::PPCSubtarget::getRegisterInfo(),llvm::MachineFrameInfo::getRestorePoint(),llvm::MachineFrameInfo::getSavePoint(),llvm::PPCFunctionInfo::getTailCallSPDelta(),llvm::MachineFunction::getTarget(),llvm::TargetOptions::GuaranteedTailCallOpt,llvm::PPCRegisterInfo::hasBasePointer(),llvm::MachineFrameInfo::hasTailCall(),I,llvm::PPCSubtarget::is32BitELFABI(),llvm::PPCSubtarget::isPPC64(),llvm::MachineBasicBlock::isReturnBlock(),llvm_unreachable,MBB,llvm::PPCFunctionInfo::mustSaveTOC(),needsFP(),llvm::TargetMachine::Options,llvm::SmallVectorTemplateBase< T, bool >::push_back(),llvm::MachineFrameInfo::setObjectOffset(),llvm::SmallVectorBase< Size_T >::size(),spillsCR(),TRI, andllvm::PPCFunctionInfo::usesPICBase().

◆ replaceFPWithRealFP()

void PPCFrameLowering::replaceFPWithRealFP

(

MachineFunction &

)

const

Definition at line386 of filePPCFrameLowering.cpp.

Referencesllvm::MachineBasicBlock::begin(),llvm::MachineBasicBlock::end(),FPReg,llvm::PPCRegisterInfo::getBaseRegister(),llvm::MachineFunction::getFrameInfo(),llvm::PPCSubtarget::getRegisterInfo(),llvm::PPCRegisterInfo::hasBasePointer(),llvm::MachineFrameInfo::hasVarSizedObjects(),MBB,MBBI, andneedsFP().

Referenced byemitPrologue().

◆ restoreCalleeSavedRegisters()

bool PPCFrameLowering::restoreCalleeSavedRegisters	(	MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator	MI,
		MutableArrayRef<CalleeSavedInfo >	CSI,
		const TargetRegisterInfo *	TRI
	)		const

overridevirtual

restoreCalleeSavedRegisters - Issues instruction(s) to restore all callee saved registers and returns true if it isn't possible / profitable to do so by issuing a series of load instructions via loadRegToStackSlot().

If it returns true, and any of the registers in CSI is not restored, it sets the corresponding Restored flag in CSI to false. Returns false otherwise.

Reimplemented fromllvm::TargetFrameLowering.

Definition at line2604 of filePPCFrameLowering.cpp.

Referencesllvm::MachineInstrBuilder::addReg(),assert(),llvm::MachineBasicBlock::begin(),llvm::BuildMI(),DL,llvm::MachineFunction::getFunction(),llvm::MachineFunction::getInfo(),llvm::PPCSubtarget::getInstrInfo(),llvm::getKillRegState(),llvm::MachineBasicBlock::getParent(),llvm::Function::hasFnAttribute(),I,llvm::PPCSubtarget::is32BitELFABI(),isCalleeSavedCR(),llvm_unreachable,llvm::HexagonInstrInfo::loadRegFromStackSlot(),MBB,MI,llvm::PPCFunctionInfo::mustSaveTOC(),needsFP(),llvm::PPCSubtarget::needsSwapsForVSXMemOps(),restoreCRs(),llvm::BitVector::set(),llvm::ArrayRef< T >::size(),TII, andTRI.

◆ spillCalleeSavedRegisters()

bool PPCFrameLowering::spillCalleeSavedRegisters	(	MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator	MI,
		ArrayRef<CalleeSavedInfo >	CSI,
		const TargetRegisterInfo *	TRI
	)		const

overridevirtual

spillCalleeSavedRegisters - Issues instruction(s) to spill all callee saved registers and returns true if it isn't possible / profitable to do so by issuing a series of store instructions via storeRegToStackSlot().

Returns false otherwise.

Reimplemented fromllvm::TargetFrameLowering.

Definition at line2410 of filePPCFrameLowering.cpp.

Referencesllvm::addFrameReference(),llvm::MachineBasicBlock::addLiveIn(),llvm::PPCFunctionInfo::addMustSaveCR(),llvm::MachineInstrBuilder::addReg(),assert(),llvm::BuildMI(),DL,llvm::MachineFunction::getFunction(),llvm::MachineFunction::getInfo(),llvm::PPCSubtarget::getInstrInfo(),llvm::getKillRegState(),llvm::MachineBasicBlock::getParent(),llvm::MachineFunction::getRegInfo(),llvm::Function::hasFnAttribute(),I,llvm::RegState::ImplicitKill,Info,llvm::MachineBasicBlock::insert(),llvm::PPCSubtarget::is32BitELFABI(),llvm_unreachable,MBB,MI,MRI,llvm::PPCFunctionInfo::mustSaveTOC(),llvm::PPCSubtarget::needsSwapsForVSXMemOps(),llvm::BitVector::set(),llvm::PPCFunctionInfo::setSpillsCR(),llvm::HexagonInstrInfo::storeRegToStackSlot(),TII, andTRI.

◆ targetHandlesStackFrameRounding()

bool llvm::PPCFrameLowering::targetHandlesStackFrameRounding

(

)

const

inlineoverridevirtual

targetHandlesStackFrameRounding - Returns true if the target is responsible for rounding up the stack frame (probably at emitPrologue time).

Reimplemented fromllvm::TargetFrameLowering.

Definition at line144 of filePPCFrameLowering.h.

◆ updateCalleeSaves()

void PPCFrameLowering::updateCalleeSaves	(	const MachineFunction &	MF,
		BitVector &	SavedRegs
	)		const

Definition at line2743 of filePPCFrameLowering.cpp.

Referencesassert(),contains(),llvm::PPCRegisterInfo::getCalleeSavedRegs(),llvm::PPCSubtarget::getRegisterInfo(),llvm::PPCSubtarget::isAIXABI(),llvm::BitVector::none(),llvm::BitVector::set(), andllvm::BitVector::test().

Referenced bydetermineCalleeSaves().

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

lib/Target/PowerPC/PPCFrameLowering.h
lib/Target/PowerPC/PPCFrameLowering.cpp

Movatterモバイル変換

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ PPCFrameLowering()

Member Function Documentation

◆ addScavengingSpillSlot()

◆ assignCalleeSavedSpillSlots()

◆ canUseAsEpilogue()

◆ canUseAsPrologue()

◆ determineCalleeSaves()

◆ determineFrameLayout()

◆ determineFrameLayoutAndUpdate()

◆ eliminateCallFramePseudoInstr()

◆ emitEpilogue()

◆ emitPrologue()

◆ enableShrinkWrapping()

◆ getBasePointerSaveOffset()

◆ getCalleeSavedSpillSlots()

◆ getFramePointerSaveOffset()

◆ getLinkageSize()

◆ getReturnSaveOffset()

◆ getStackThreshold()

◆ getTOCSaveOffset()

◆ hasFPImpl()

◆ inlineStackProbe()

◆ needsFP()

◆ processFunctionBeforeFrameFinalized()

◆ replaceFPWithRealFP()

◆ restoreCalleeSavedRegisters()

◆ spillCalleeSavedRegisters()

◆ targetHandlesStackFrameRounding()

◆ updateCalleeSaves()