llvm::PPCFrameLowering Class Reference

#include <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
void	emitPrologue (MachineFunction &MF) const
void	emitEpilogue (MachineFunction &MF, MachineBasicBlock &MBB) const
bool	hasFP (const MachineFunction &MF) const
bool	needsFP (const MachineFunction &MF) const
void	replaceFPWithRealFP (MachineFunction &MF) const
void	processFunctionBeforeCalleeSavedScan (MachineFunction &MF, RegScavenger *RS=NULL) const
void	processFunctionBeforeFrameFinalized (MachineFunction &MF, RegScavenger *RS=NULL) const
void	addScavengingSpillSlot (MachineFunction &MF, RegScavenger *RS) const
bool	spillCalleeSavedRegisters (MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, const std::vector< CalleeSavedInfo > &CSI, const TargetRegisterInfo *TRI) const
void	eliminateCallFramePseudoInstr (MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator I) const
bool	restoreCalleeSavedRegisters (MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, const std::vector< CalleeSavedInfo > &CSI, const TargetRegisterInfo *TRI) const
bool	targetHandlesStackFrameRounding () const
const SpillSlot *	getCalleeSavedSpillSlots (unsigned &NumEntries) const
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
unsigned	getStackAlignment () const
unsigned	getTransientStackAlignment () const
bool	isStackRealignable () const
int	getOffsetOfLocalArea () const
virtual bool	isFPCloseToIncomingSP () const
virtual void	adjustForSegmentedStacks (MachineFunction &MF) const
virtual void	adjustForHiPEPrologue (MachineFunction &MF) const
virtual bool	hasReservedCallFrame (const MachineFunction &MF) const
virtual bool	canSimplifyCallFramePseudos (const MachineFunction &MF) const
virtual int	getFrameIndexOffset (const MachineFunction &MF, int FI) const
virtual int	getFrameIndexReference (const MachineFunction &MF, int FI, unsigned &FrameReg) const

Static Public Member Functions
static unsigned	getReturnSaveOffset (bool isPPC64, bool isDarwinABI)
static unsigned	getFramePointerSaveOffset (bool isPPC64, bool isDarwinABI)
static unsigned	getBasePointerSaveOffset (bool isPPC64, bool isDarwinABI)
static unsigned	getLinkageSize (bool isPPC64, bool isDarwinABI)
static unsigned	getMinCallArgumentsSize (bool isPPC64, bool isDarwinABI)
static unsigned	getMinCallFrameSize (bool isPPC64, bool isDarwinABI)

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

Detailed Description

Definition at line 25 of file PPCFrameLowering.h.

Constructor & Destructor Documentation

llvm::PPCFrameLowering::PPCFrameLowering ( const PPCSubtarget &  sti )

inline

Definition at line 29 of file PPCFrameLowering.h.

Member Function Documentation

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

Definition at line 1154 of file PPCFrameLowering.cpp.

References llvm::RegScavenger::addScavengingFrameIndex(), llvm::MachineFrameInfo::CreateStackObject(), determineFrameLayout(), llvm::TargetRegisterClass::getAlignment(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFrameInfo::getMaxAlignment(), llvm::TargetRegisterClass::getSize(), llvm::TargetFrameLowering::getStackAlignment(), hasNonRISpills(), hasSpills(), llvm::MachineFrameInfo::hasVarSizedObjects(), llvm::isInt< 16 >(), llvm::PPCSubtarget::isPPC64(), spillsCR(), and spillsVRSAVE().

Referenced by processFunctionBeforeFrameFinalized().

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 198 of file PPCFrameLowering.cpp.

References llvm::MachineFrameInfo::adjustsStack(), DisableRedZone(), llvm::MachineFrameInfo::estimateStackSize(), llvm::Function::getAttributes(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getFunction(), llvm::MachineFrameInfo::getMaxAlignment(), llvm::MachineFrameInfo::getMaxCallFrameSize(), getMinCallFrameSize(), llvm::TargetMachine::getRegisterInfo(), llvm::TargetFrameLowering::getStackAlignment(), llvm::MachineFrameInfo::getStackSize(), llvm::MachineFunction::getTarget(), llvm::PPCRegisterInfo::hasBasePointer(), llvm::MachineFrameInfo::hasVarSizedObjects(), llvm::PPCSubtarget::isDarwinABI(), llvm::PPCSubtarget::isPPC64(), llvm::PPCSubtarget::isSVR4ABI(), llvm::Attribute::NoRedZone, llvm::MachineFrameInfo::setMaxCallFrameSize(), and llvm::MachineFrameInfo::setStackSize().

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

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

virtual

eliminateCallFramePseudoInstr - 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.

Reimplemented from llvm::TargetFrameLowering.

Definition at line 1298 of file PPCFrameLowering.cpp.

References llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), llvm::BuildMI(), llvm::MachineBasicBlock::erase(), llvm::MachineInstr::getDebugLoc(), llvm::TargetMachine::getInstrInfo(), llvm::MachineFunction::getTarget(), llvm::TargetOptions::GuaranteedTailCallOpt, I, llvm::isInt< 16 >(), llvm::PPCSubtarget::isPPC64(), llvm::RegState::Kill, llvm::A64CC::MI, llvm::TargetMachine::Options, and TII.

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

virtual

Implements llvm::TargetFrameLowering.

Definition at line 646 of file PPCFrameLowering.cpp.

References llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), llvm::BuildMI(), llvm::SmallVectorBase::empty(), llvm::MachineBasicBlock::end(), llvm::CallingConv::Fast, llvm::DebugLoc::get(), llvm::PPCFunctionInfo::getBasePointerSaveIndex(), getBasePointerSaveOffset(), llvm::Function::getCallingConv(), llvm::MachineFunction::getFrameInfo(), llvm::PPCFunctionInfo::getFramePointerSaveIndex(), getFramePointerSaveOffset(), llvm::MachineFunction::getFunction(), llvm::MachineOperand::getGlobal(), llvm::MachineOperand::getImm(), llvm::MachineFunction::getInfo(), llvm::TargetMachine::getInstrInfo(), llvm::getKillRegState(), llvm::MachineBasicBlock::getLastNonDebugInstr(), llvm::PPCFunctionInfo::getMinReservedArea(), llvm::PPCFunctionInfo::getMustSaveCRs(), llvm::MachineFrameInfo::getObjectOffset(), llvm::MachineOperand::getOffset(), llvm::TargetMachine::getRegisterInfo(), getReturnSaveOffset(), llvm::MachineFrameInfo::getStackSize(), llvm::PPCFunctionInfo::getTailCallSPDelta(), llvm::MachineFunction::getTarget(), llvm::TargetOptions::GuaranteedTailCallOpt, llvm::PPCRegisterInfo::hasBasePointer(), llvm::PPCFunctionInfo::hasFastCall(), hasFP(), llvm::MachineFrameInfo::hasVarSizedObjects(), llvm::PPCSubtarget::isDarwinABI(), llvm::MachineOperand::isImm(), llvm::isInt< 16 >(), llvm::PPCSubtarget::isPPC64(), llvm::PPCSubtarget::isSVR4ABI(), llvm::RegState::Kill, llvm::A64DB::LD, llvm::PPCFunctionInfo::mustSaveLR(), MustSaveLR(), llvm::TargetMachine::Options, llvm::SmallVectorTemplateCommon< T, typename >::size(), and TII.

void PPCFrameLowering::emitPrologue ( MachineFunction &  MF ) const

virtual

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

Implements llvm::TargetFrameLowering.

Definition at line 333 of file PPCFrameLowering.cpp.

References llvm::MachineModuleInfo::addFrameInst(), llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), llvm::MachineBasicBlock::begin(), llvm::BuildMI(), llvm::MCCFIInstruction::createDefCfaOffset(), llvm::MCCFIInstruction::createDefCfaRegister(), llvm::MCCFIInstruction::createOffset(), llvm::MCContext::CreateTempSymbol(), determineFrameLayout(), llvm::SmallVectorBase::empty(), llvm::MachineBasicBlock::end(), llvm::MachineFunction::front(), llvm::PPCFunctionInfo::getBasePointerSaveIndex(), getBasePointerSaveOffset(), llvm::MachineFrameInfo::getCalleeSavedInfo(), llvm::MachineModuleInfo::getContext(), llvm::MCRegisterInfo::getDwarfRegNum(), llvm::MachineFunction::getFrameInfo(), llvm::PPCFunctionInfo::getFramePointerSaveIndex(), getFramePointerSaveOffset(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), llvm::TargetMachine::getInstrInfo(), llvm::getKillRegState(), llvm::MachineFrameInfo::getMaxAlignment(), llvm::MachineFunction::getMMI(), llvm::PPCFunctionInfo::getMustSaveCRs(), llvm::MachineFrameInfo::getObjectOffset(), llvm::TargetMachine::getRegisterInfo(), llvm::MCContext::getRegisterInfo(), getReturnSaveOffset(), llvm::MachineFunction::getTarget(), HandleVRSaveUpdate(), llvm::PPCRegisterInfo::hasBasePointer(), llvm::MachineModuleInfo::hasDebugInfo(), hasFP(), I, llvm::RegState::ImplicitKill, llvm::PPCSubtarget::isDarwinABI(), 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, llvm::TargetOpcode::PROLOG_LABEL, replaceFPWithRealFP(), llvm::NVPTX::PTXCvtMode::RM, llvm::SmallVectorTemplateCommon< T, typename >::size(), and TII.

static unsigned llvm::PPCFrameLowering::getBasePointerSaveOffset ( bool  isPPC64, bool  isDarwinABI  )

inlinestatic

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

Definition at line 99 of file PPCFrameLowering.h.

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

const SpillSlot* llvm::PPCFrameLowering::getCalleeSavedSpillSlots ( unsigned &  NumEntries ) const

inlinevirtual

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 144 of file PPCFrameLowering.h.

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

static unsigned llvm::PPCFrameLowering::getFramePointerSaveOffset ( bool  isPPC64, bool  isDarwinABI  )

inlinestatic

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

Definition at line 84 of file PPCFrameLowering.h.

Referenced by emitEpilogue(), emitPrologue(), EmitTailCallStoreFPAndRetAddr(), and processFunctionBeforeCalleeSavedScan().

static unsigned llvm::PPCFrameLowering::getLinkageSize ( bool  isPPC64, bool  isDarwinABI  )

inlinestatic

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

Definition at line 109 of file PPCFrameLowering.h.

Referenced by CalculateParameterAndLinkageAreaSize(), and getMinCallFrameSize().

static unsigned llvm::PPCFrameLowering::getMinCallArgumentsSize ( bool  isPPC64, bool  isDarwinABI  )

inlinestatic

getMinCallArgumentsSize - Return the size of the minium PowerPC ABI argument area.

Definition at line 119 of file PPCFrameLowering.h.

Referenced by getMinCallFrameSize().

static unsigned llvm::PPCFrameLowering::getMinCallFrameSize ( bool  isPPC64, bool  isDarwinABI  )

inlinestatic

getMinCallFrameSize - Return the minimum size a call frame can be using the PowerPC ABI.

Definition at line 136 of file PPCFrameLowering.h.

References getLinkageSize(), and getMinCallArgumentsSize().

Referenced by CalculateParameterAndLinkageAreaSize(), and determineFrameLayout().

static unsigned llvm::PPCFrameLowering::getReturnSaveOffset ( bool  isPPC64, bool  isDarwinABI  )

inlinestatic

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

Definition at line 75 of file PPCFrameLowering.h.

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

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

virtual

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 268 of file PPCFrameLowering.cpp.

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

Referenced by emitEpilogue(), and emitPrologue().

bool PPCFrameLowering::needsFP

(

const MachineFunction &

MF

)

const

Definition at line 279 of file PPCFrameLowering.cpp.

References llvm::TargetOptions::DisableFramePointerElim(), llvm::Function::getAttributes(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), llvm::MachineFunction::getTarget(), llvm::TargetOptions::GuaranteedTailCallOpt, llvm::AttributeSet::hasAttribute(), llvm::MachineFrameInfo::hasVarSizedObjects(), llvm::Attribute::Naked, and llvm::TargetMachine::Options.

Referenced by llvm::PPCRegisterInfo::getReservedRegs(), hasFP(), processFunctionBeforeCalleeSavedScan(), processFunctionBeforeFrameFinalized(), replaceFPWithRealFP(), and restoreCalleeSavedRegisters().

void PPCFrameLowering::processFunctionBeforeCalleeSavedScan ( MachineFunction &  MF, RegScavenger *  RS = NULL  ) const

virtual

processFunctionBeforeCalleeSavedScan - This method is called immediately before PrologEpilogInserter scans the physical registers used to determine what callee saved registers should be spilled. This method is optional.

Reimplemented from llvm::TargetFrameLowering.

Definition at line 889 of file PPCFrameLowering.cpp.

References llvm::MachineFrameInfo::CreateFixedObject(), llvm::PPCFunctionInfo::getBasePointerSaveIndex(), getBasePointerSaveOffset(), llvm::MachineFunction::getFrameInfo(), llvm::PPCFunctionInfo::getFramePointerSaveIndex(), getFramePointerSaveOffset(), llvm::MachineFunction::getInfo(), llvm::MachineFunction::getRegInfo(), llvm::TargetMachine::getRegisterInfo(), llvm::PPCFunctionInfo::getTailCallSPDelta(), llvm::MachineFunction::getTarget(), llvm::TargetOptions::GuaranteedTailCallOpt, llvm::PPCRegisterInfo::hasBasePointer(), llvm::PPCSubtarget::isDarwinABI(), llvm::MachineRegisterInfo::isPhysRegUsed(), llvm::PPCSubtarget::isPPC64(), MRI, MustSaveLR(), needsFP(), llvm::TargetMachine::Options, llvm::PPCFunctionInfo::setBasePointerSaveIndex(), llvm::PPCFunctionInfo::setCRSpillFrameIndex(), llvm::PPCFunctionInfo::setFramePointerSaveIndex(), llvm::PPCFunctionInfo::setMustSaveLR(), and llvm::MachineRegisterInfo::setPhysRegUnused().

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

virtual

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 944 of file PPCFrameLowering.cpp.

References addScavengingSpillSlot(), llvm::PPCFunctionInfo::getBasePointerSaveIndex(), llvm::MachineFrameInfo::getCalleeSavedInfo(), llvm::MachineFunction::getFrameInfo(), llvm::PPCFunctionInfo::getFramePointerSaveIndex(), llvm::MachineFunction::getInfo(), llvm::MachineFrameInfo::getObjectOffset(), llvm::TargetMachine::getRegisterInfo(), llvm::PPCFunctionInfo::getTailCallSPDelta(), llvm::MachineFunction::getTarget(), llvm::TargetOptions::GuaranteedTailCallOpt, llvm::PPCRegisterInfo::hasBasePointer(), llvm::PPCSubtarget::isPPC64(), llvm::PPCSubtarget::isSVR4ABI(), llvm_unreachable, needsFP(), llvm::TargetMachine::Options, llvm::SmallVectorTemplateBase< T, isPodLike< T >::value >::push_back(), llvm::MachineFrameInfo::setObjectOffset(), llvm::SmallVectorTemplateCommon< T >::size(), and spillsCR().

void PPCFrameLowering::replaceFPWithRealFP

(

MachineFunction &

MF

)

const

Definition at line 294 of file PPCFrameLowering.cpp.

References llvm::MachineFunction::begin(), llvm::MachineFunction::end(), llvm::MachineOperand::getReg(), llvm::TargetMachine::getRegisterInfo(), llvm::MachineFunction::getTarget(), llvm::PPCRegisterInfo::hasBasePointer(), I, llvm::MachineOperand::isReg(), needsFP(), and llvm::MachineOperand::setReg().

Referenced by emitPrologue().

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

virtual

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(). Returns false otherwise.

Reimplemented from llvm::TargetFrameLowering.

Definition at line 1339 of file PPCFrameLowering.cpp.

References llvm::MachineBasicBlock::begin(), llvm::TargetMachine::getInstrInfo(), llvm::TargetRegisterInfo::getMinimalPhysRegClass(), llvm::MachineBasicBlock::getParent(), llvm::MachineFunction::getTarget(), I, llvm::PPCSubtarget::isDarwinABI(), llvm::PPCSubtarget::isPPC64(), llvm::PPCSubtarget::isSVR4ABI(), llvm::PPCInstrInfo::loadRegFromStackSlot(), llvm::A64CC::MI, needsFP(), restoreCRs(), and TII.

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

virtual

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 1194 of file PPCFrameLowering.cpp.

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

bool llvm::PPCFrameLowering::targetHandlesStackFrameRounding ( ) const

inlinevirtual

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 71 of file PPCFrameLowering.h.

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

• PPCFrameLowering.h
• PPCFrameLowering.cpp