#include "Target/PowerPC/PPCFrameLowering.h"

Inheritance diagram for llvm::PPCFrameLowering:

Collaboration diagram for llvm::PPCFrameLowering:

Public Member Functions
	PPCFrameLowering (const PPCSubtarget &STI)

unsigned	determineFrameLayout (MachineFunction &MF, bool UpdateMF=true, bool UseEstimate=false) const
	determineFrameLayout - Determine the size of the frame and maximum call frame size. More...

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

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

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

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 by TargetRegisterInfo::getCalleeSavedRegs() should actually get saved. More...

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. More...

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

bool	spillCalleeSavedRegisters (MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, const std::vector< 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(). More...

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. More...

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 the Target is using them). More...

bool	restoreCalleeSavedRegisters (MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, std::vector< 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(). More...

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

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

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

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

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

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

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. More...

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

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

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

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

virtual	~TargetFrameLowering ()

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

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

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

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

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

virtual unsigned	getStackAlignmentSkew (const MachineFunction &MF) const
	Return the skew that has to be applied to stack alignment under certain conditions (e.g. More...

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

virtual bool	isFPCloseToIncomingSP () const
	isFPCloseToIncomingSP - Return true if the frame pointer is close to the incoming stack pointer, false if it is close to the post-prologue stack pointer. More...

virtual bool	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. More...

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

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

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

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. More...

virtual bool	keepFramePointer (const MachineFunction &MF) const
	Return true if the target wants to keep the frame pointer regardless of the function attribute "frame-pointer". More...

virtual bool	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. More...

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

virtual bool	needsFrameIndexResolution (const MachineFunction &MF) const

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

virtual int	getFrameIndexReferencePreferSP (const MachineFunction &MF, int FI, unsigned &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`. More...

virtual unsigned	getWinEHParentFrameOffset (const MachineFunction &MF) const

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

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

virtual unsigned	getInitialCFARegister (const MachineFunction &MF) const
	Return initial CFA register value i.e. More...

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

Static Public Member Functions inherited from llvm::TargetFrameLowering
static bool	isSafeForNoCSROpt (const Function &F)
	Check if given function is safe for not having callee saved registers. More...

Detailed Description

Definition at line 24 of file PPCFrameLowering.h.

Constructor & Destructor Documentation

◆ PPCFrameLowering()

PPCFrameLowering::PPCFrameLowering ( const PPCSubtarget & STI )

Definition at line 93 of file PPCFrameLowering.cpp.

Member Function Documentation

◆ addScavengingSpillSlot()

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

◆ 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 from llvm::TargetFrameLowering.

Definition at line 1978 of file PPCFrameLowering.cpp.

References contains(), EnablePEVectorSpills, llvm::BitVector::find_first(), llvm::TargetRegisterInfo::getAllocatableSet(), llvm::PPCRegisterInfo::getCalleeSavedRegs(), llvm::MachineFunction::getFrameInfo(), llvm::MCRegisterInfo::getNumRegs(), llvm::MachineFunction::getRegInfo(), llvm::PPCSubtarget::getRegisterInfo(), llvm::MachineFrameInfo::hasCalls(), llvm::PPCSubtarget::hasP9Vector(), llvm::MachineRegisterInfo::isPhysRegUsed(), llvm::BitVector::none(), Reg, llvm::BitVector::reset(), llvm::BitVector::set_bits(), and llvm::BitVector::size().

◆ canUseAsEpilogue()

bool PPCFrameLowering::canUseAsEpilogue ( const MachineBasicBlock & MBB ) const

overridevirtual

Check whether or not the given MBB 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 if MBB 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 from llvm::TargetFrameLowering.

Definition at line 710 of file PPCFrameLowering.cpp.

Referenced by getLinkageSize().

◆ 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 from llvm::TargetFrameLowering.

Definition at line 703 of file PPCFrameLowering.cpp.

Referenced by getLinkageSize().

◆ determineCalleeSaves()

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

overridevirtual

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

The default implementation checks populates the SavedRegs 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.

Reimplemented from llvm::TargetFrameLowering.

Definition at line 1613 of file PPCFrameLowering.cpp.

◆ determineFrameLayout()

unsigned PPCFrameLowering::determineFrameLayout	(	MachineFunction &	MF,
		bool	UpdateMF = `true`,
		bool	UseEstimate = `false`
	)		const

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

Definition at line 451 of file PPCFrameLowering.cpp.

Referenced by addScavengingSpillSlot(), emitPrologue(), llvm::PPCRegisterInfo::needsFrameBaseReg(), and replaceFPWithRealFP().

◆ 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 the Target 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 from llvm::TargetFrameLowering.

Definition at line 2150 of file PPCFrameLowering.cpp.

References llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), llvm::BuildMI(), llvm::MachineBasicBlock::erase(), llvm::MCInstrInfo::get(), llvm::PPCSubtarget::getInstrInfo(), llvm::MachineFunction::getTarget(), llvm::TargetOptions::GuaranteedTailCallOpt, I, is64Bit(), llvm::isInt< 16 >(), llvm::PPCSubtarget::isPPC64(), llvm::RegState::Kill, llvm::TargetMachine::Options, and TII.

Referenced by restoreCRs().

◆ emitEpilogue()

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

overridevirtual

Implements llvm::TargetFrameLowering.

Definition at line 1246 of file PPCFrameLowering.cpp.

◆ emitPrologue()

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

overridevirtual

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

Implements llvm::TargetFrameLowering.

Definition at line 716 of file PPCFrameLowering.cpp.

References llvm::MachineFunction::addFrameInst(), llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), assert(), llvm::MachineBasicBlock::begin(), llvm::BuildMI(), contains(), llvm::MCCFIInstruction::createDefCfaOffset(), llvm::MCCFIInstruction::createDefCfaRegister(), llvm::MCCFIInstruction::createOffset(), llvm::MCCFIInstruction::createRegister(), determineFrameLayout(), E, llvm::SmallVectorBase::empty(), llvm::MachineBasicBlock::end(), llvm::PPCFunctionInfo::getBasePointerSaveIndex(), getBasePointerSaveOffset(), llvm::PPCRegisterInfo::getBaseRegister(), llvm::MachineFrameInfo::getCalleeSavedInfo(), llvm::MachineModuleInfo::getContext(), llvm::MCRegisterInfo::getDwarfRegNum(), llvm::MachineFunction::getFrameInfo(), llvm::PPCFunctionInfo::getFramePointerSaveIndex(), getFramePointerSaveOffset(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), llvm::PPCSubtarget::getInstrInfo(), llvm::getKillRegState(), llvm::MachineFrameInfo::getMaxAlignment(), llvm::MachineFunction::getMMI(), llvm::PPCFunctionInfo::getMustSaveCRs(), llvm::MachineFrameInfo::getObjectOffset(), llvm::PPCFunctionInfo::getPICBasePointerSaveIndex(), llvm::PPCSubtarget::getRegisterInfo(), llvm::MCContext::getRegisterInfo(), getReturnSaveOffset(), HandleVRSaveUpdate(), llvm::PPCRegisterInfo::hasBasePointer(), llvm::MachineModuleInfo::hasDebugInfo(), hasFP(), I, llvm::RegState::ImplicitKill, llvm::PPCSubtarget::isDarwinABI(), llvm::PPCSubtarget::isELFv2ABI(), llvm::MachineFrameInfo::isFrameAddressTaken(), llvm::isInt< 16 >(), llvm::isInt< 32 >(), llvm::isPowerOf2_32(), llvm::PPCSubtarget::isPPC64(), llvm::PPCSubtarget::isSVR4ABI(), llvm::RegState::Kill, llvm_unreachable, llvm::Log2_32(), MRI, llvm::PPCFunctionInfo::mustSaveLR(), MustSaveLR(), llvm::Function::needsUnwindTableEntry(), OR, Reg, replaceFPWithRealFP(), llvm::NVPTX::PTXCvtMode::RM, llvm::SmallVectorBase::size(), TII, and llvm::PPCFunctionInfo::usesPICBase().

◆ enableShrinkWrapping()

bool PPCFrameLowering::enableShrinkWrapping ( const MachineFunction & MF ) const

overridevirtual

Returns true if the target will correctly handle shrink wrapping.

Reimplemented from llvm::TargetFrameLowering.

Definition at line 2280 of file PPCFrameLowering.cpp.

References llvm::MachineFunction::getInfo(), llvm::MachineFunction::getSubtarget(), llvm::PPCSubtarget::isSVR4ABI(), and llvm::PPCFunctionInfo::shrinkWrapDisabled().

Referenced by getLinkageSize().

◆ getBasePointerSaveOffset()

unsigned llvm::PPCFrameLowering::getBasePointerSaveOffset ( ) const

inline

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

Definition at line 138 of file PPCFrameLowering.h.

Referenced by determineCalleeSaves(), emitEpilogue(), and emitPrologue().

◆ 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 from llvm::TargetFrameLowering.

Definition at line 103 of file PPCFrameLowering.cpp.

References llvm::array_lengthof(), llvm::PPCSubtarget::isDarwinABI(), llvm::PPCSubtarget::isPPC64(), and llvm::PPCSubtarget::isSVR4ABI().

Referenced by getLinkageSize().

◆ getFramePointerSaveOffset()

unsigned llvm::PPCFrameLowering::getFramePointerSaveOffset ( ) const

inline

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

Definition at line 134 of file PPCFrameLowering.h.

Referenced by determineCalleeSaves(), emitEpilogue(), and emitPrologue().

◆ getLinkageSize()

unsigned llvm::PPCFrameLowering::getLinkageSize ( ) const

inline

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

Definition at line 142 of file PPCFrameLowering.h.

References canUseAsEpilogue(), canUseAsPrologue(), enableShrinkWrapping(), and getCalleeSavedSpillSlots().

Referenced by determineFrameLayout(), EnsureStackAlignment(), and needStackSlotPassParameters().

◆ getReturnSaveOffset()

unsigned llvm::PPCFrameLowering::getReturnSaveOffset ( ) const

inline

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

Definition at line 126 of file PPCFrameLowering.h.

Referenced by emitEpilogue(), and emitPrologue().

◆ getTOCSaveOffset()

unsigned llvm::PPCFrameLowering::getTOCSaveOffset ( ) const

inline

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

Definition at line 130 of file PPCFrameLowering.h.

◆ hasFP()

bool PPCFrameLowering::hasFP ( const MachineFunction & MF ) const

overridevirtual

hasFP - Return true if the specified function should have a dedicated frame pointer register.

For most targets this is true only if the function has variable sized allocas or if frame pointer elimination is disabled.

Implements llvm::TargetFrameLowering.

Definition at line 518 of file PPCFrameLowering.cpp.

References llvm::MachineFunction::getFrameInfo(), llvm::MachineFrameInfo::getStackSize(), and needsFP().

Referenced by emitEpilogue(), emitPrologue(), llvm::PPCRegisterInfo::getFrameRegister(), and llvm::PPCRegisterInfo::getRegPressureLimit().

◆ needsFP()

◆ 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 from llvm::TargetFrameLowering.

Definition at line 1687 of file PPCFrameLowering.cpp.

References addScavengingSpillSlot(), 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::PPCSubtarget::hasSPE(), llvm::MachineFrameInfo::hasTailCall(), llvm::PPCSubtarget::isPPC64(), llvm::MachineBasicBlock::isReturnBlock(), llvm::PPCSubtarget::isSVR4ABI(), llvm_unreachable, needsFP(), llvm::TargetMachine::Options, llvm::SmallVectorTemplateBase< T >::push_back(), Reg, llvm::MachineFrameInfo::setObjectOffset(), llvm::SmallVectorBase::size(), spillsCR(), TRI, and llvm::PPCFunctionInfo::usesPICBase().

◆ replaceFPWithRealFP()

void PPCFrameLowering::replaceFPWithRealFP ( MachineFunction & MF ) const

Definition at line 543 of file PPCFrameLowering.cpp.

References assert(), llvm::MachineBasicBlock::begin(), llvm::MachineFunction::begin(), llvm::BitVector::count(), determineFrameLayout(), E, llvm::MachineBasicBlock::empty(), llvm::MachineBasicBlock::end(), llvm::MachineFunction::end(), llvm::RegScavenger::enterBasicBlock(), llvm::BitVector::find_first(), llvm::BitVector::find_next(), llvm::RegScavenger::forward(), llvm::MachineFunction::front(), llvm::PPCRegisterInfo::getBaseRegister(), llvm::PPCRegisterInfo::getCalleeSavedRegs(), llvm::MachineBasicBlock::getFirstTerminator(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFrameInfo::getMaxAlignment(), llvm::MachineBasicBlock::getParent(), llvm::MachineOperand::getReg(), llvm::PPCSubtarget::getRegisterInfo(), llvm::RegScavenger::getRegsAvailable(), llvm::PPCRegisterInfo::hasBasePointer(), I, llvm::isInt< 16 >(), llvm::PPCSubtarget::isPPC64(), llvm::MachineOperand::isReg(), llvm::RegScavenger::isRegUsed(), llvm::MachineBasicBlock::isReturnBlock(), llvm::PPCSubtarget::isSVR4ABI(), needsFP(), llvm::BitVector::reset(), and llvm::MachineOperand::setReg().

Referenced by emitPrologue().

◆ restoreCalleeSavedRegisters()

bool PPCFrameLowering::restoreCalleeSavedRegisters	(	MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator	MI,
		std::vector< 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 from llvm::TargetFrameLowering.

Definition at line 2189 of file PPCFrameLowering.cpp.

References assert(), llvm::MachineBasicBlock::begin(), llvm::BuildMI(), llvm::PPCSubtarget::getInstrInfo(), llvm::getKillRegState(), llvm::TargetRegisterInfo::getMinimalPhysRegClass(), llvm::MachineBasicBlock::getParent(), I, llvm::PPCSubtarget::isDarwinABI(), llvm::PPCSubtarget::isPPC64(), llvm::PPCSubtarget::isSVR4ABI(), llvm::PPCInstrInfo::loadRegFromStackSlot(), MI, needsFP(), Reg, restoreCRs(), and TII.

◆ spillCalleeSavedRegisters()

bool PPCFrameLowering::spillCalleeSavedRegisters	(	MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator	MI,
		const std::vector< 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 from llvm::TargetFrameLowering.

Definition at line 2032 of file PPCFrameLowering.cpp.

References llvm::addFrameReference(), llvm::MachineBasicBlock::addLiveIn(), llvm::PPCFunctionInfo::addMustSaveCR(), llvm::MachineInstrBuilder::addReg(), llvm::BuildMI(), llvm::MachineFunction::getInfo(), llvm::PPCSubtarget::getInstrInfo(), llvm::getKillRegState(), llvm::TargetRegisterInfo::getMinimalPhysRegClass(), llvm::MachineBasicBlock::getParent(), llvm::MachineFunction::getRegInfo(), llvm::RegState::ImplicitKill, llvm::MachineBasicBlock::insert(), llvm::PPCSubtarget::isDarwinABI(), llvm::MachineRegisterInfo::isLiveIn(), llvm::PPCSubtarget::isPPC64(), llvm::PPCSubtarget::isSVR4ABI(), MRI, Reg, llvm::PPCFunctionInfo::setSpillsCR(), llvm::PPCInstrInfo::storeRegToStackSlot(), and TII.

◆ 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 from llvm::TargetFrameLowering.

Definition at line 122 of file PPCFrameLowering.h.

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

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

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ PPCFrameLowering()

Member Function Documentation

◆ addScavengingSpillSlot()

◆ assignCalleeSavedSpillSlots()

◆ canUseAsEpilogue()

◆ canUseAsPrologue()

◆ determineCalleeSaves()

◆ determineFrameLayout()

◆ eliminateCallFramePseudoInstr()

◆ emitEpilogue()

◆ emitPrologue()

◆ enableShrinkWrapping()

◆ getBasePointerSaveOffset()

◆ getCalleeSavedSpillSlots()

◆ getFramePointerSaveOffset()

◆ getLinkageSize()

◆ getReturnSaveOffset()

◆ getTOCSaveOffset()

◆ hasFP()

◆ needsFP()

◆ processFunctionBeforeFrameFinalized()

◆ replaceFPWithRealFP()

◆ restoreCalleeSavedRegisters()

◆ spillCalleeSavedRegisters()

◆ targetHandlesStackFrameRounding()