#include <XCoreFrameLowering.h>

Inheritance diagram for llvm::XCoreFrameLowering:

Collaboration diagram for llvm::XCoreFrameLowering:

Public Member Functions
	XCoreFrameLowering (const XCoreSubtarget &STI)

void	emitPrologue (MachineFunction &MF) const

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

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

bool	restoreCalleeSavedRegisters (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	hasFP (const MachineFunction &MF) const

void	processFunctionBeforeCalleeSavedScan (MachineFunction &MF, RegScavenger *RS=NULL) 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 const SpillSlot *	getCalleeSavedSpillSlots (unsigned &NumEntries) const

virtual bool	targetHandlesStackFrameRounding () 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

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

Static Public Member Functions
static int	stackSlotSize ()
	Stack slot size (4 bytes) More...

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

Detailed Description

Definition at line 24 of file XCoreFrameLowering.h.

Constructor & Destructor Documentation

XCoreFrameLowering::XCoreFrameLowering ( const XCoreSubtarget & STI )

Definition at line 76 of file XCoreFrameLowering.cpp.

Member Function Documentation

void XCoreFrameLowering::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 335 of file XCoreFrameLowering.cpp.

References Align(), llvm::BuildMI(), llvm::MachineBasicBlock::erase(), llvm::errs(), llvm::MachineInstr::getDebugLoc(), llvm::MachineOperand::getImm(), llvm::TargetMachine::getInstrInfo(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::TargetFrameLowering::getStackAlignment(), llvm::MachineFunction::getTarget(), llvm::TargetFrameLowering::hasReservedCallFrame(), I, llvm::MachineBasicBlock::insert(), isImmU16(), isImmU6(), llvm_unreachable, and TII.

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

virtual

void XCoreFrameLowering::emitPrologue ( MachineFunction & MF ) const

virtual

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

Implements llvm::TargetFrameLowering.

Definition at line 86 of file XCoreFrameLowering.cpp.

References llvm::MachineModuleInfo::addFrameInst(), llvm::MachineBasicBlock::addLiveIn(), llvm::MachineBasicBlock::begin(), llvm::BuildMI(), llvm::MCCFIInstruction::createDefCfaOffset(), llvm::MCCFIInstruction::createDefCfaRegister(), llvm::MCCFIInstruction::createOffset(), llvm::MCContext::CreateTempSymbol(), llvm::MachineBasicBlock::end(), llvm::MachineFunction::front(), llvm::Function::getAttributes(), llvm::MachineModuleInfo::getContext(), llvm::MCRegisterInfo::getDwarfRegNum(), llvm::XCoreFunctionInfo::getFPSpillSlot(), llvm::CalleeSavedInfo::getFrameIdx(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), llvm::TargetMachine::getInstrInfo(), llvm::XCoreFunctionInfo::getLRSpillSlot(), llvm::MachineFrameInfo::getMaxAlignment(), llvm::MachineFunction::getMMI(), llvm::MachineFrameInfo::getObjectOffset(), llvm::CalleeSavedInfo::getReg(), llvm::MCContext::getRegisterInfo(), llvm::XCoreFunctionInfo::getSpillLabels(), llvm::TargetFrameLowering::getStackAlignment(), llvm::MachineFrameInfo::getStackSize(), llvm::MachineFunction::getTarget(), llvm::XCoreFunctionInfo::getUsesLR(), llvm::AttributeSet::hasAttrSomewhere(), hasFP(), I, isImmU16(), isImmU6(), loadFromStack(), MRI, llvm::XCoreRegisterInfo::needsFrameMoves(), llvm::Attribute::Nest, llvm::TargetOpcode::PROLOG_LABEL, llvm::report_fatal_error(), storeToStack(), and TII.

bool XCoreFrameLowering::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 81 of file XCoreFrameLowering.cpp.

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

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

void XCoreFrameLowering::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 385 of file XCoreFrameLowering.cpp.

References llvm::RegScavenger::addScavengingFrameIndex(), llvm::MachineFrameInfo::CreateFixedObject(), llvm::MachineFrameInfo::CreateStackObject(), llvm::TargetRegisterClass::getAlignment(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), llvm::MachineFunction::getRegInfo(), llvm::TargetMachine::getRegisterInfo(), llvm::TargetRegisterClass::getSize(), llvm::MachineFunction::getTarget(), hasFP(), llvm::MachineRegisterInfo::isPhysRegUsed(), llvm::Function::isVarArg(), llvm::TargetRegisterInfo::requiresRegisterScavenging(), llvm::XCoreFunctionInfo::setFPSpillSlot(), llvm::XCoreFunctionInfo::setLRSpillSlot(), llvm::MachineRegisterInfo::setPhysRegUnused(), and llvm::XCoreFunctionInfo::setUsesLR().

bool XCoreFrameLowering::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 301 of file XCoreFrameLowering.cpp.

References llvm::MachineBasicBlock::begin(), llvm::TargetMachine::getInstrInfo(), llvm::TargetRegisterInfo::getMinimalPhysRegClass(), llvm::MachineBasicBlock::getParent(), llvm::MachineFunction::getTarget(), llvm::TargetInstrInfo::loadRegFromStackSlot(), llvm::A64CC::MI, and TII.

bool XCoreFrameLowering::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 267 of file XCoreFrameLowering.cpp.

References llvm::MachineBasicBlock::addLiveIn(), llvm::BuildMI(), llvm::MCContext::CreateTempSymbol(), llvm::MachineBasicBlock::end(), llvm::MCInstrInfo::get(), llvm::MachineFunction::getContext(), llvm::MachineFunction::getInfo(), llvm::TargetMachine::getInstrInfo(), llvm::TargetRegisterInfo::getMinimalPhysRegClass(), llvm::MachineBasicBlock::getParent(), llvm::XCoreFunctionInfo::getSpillLabels(), llvm::MachineFunction::getTarget(), llvm::XCoreRegisterInfo::needsFrameMoves(), llvm::TargetOpcode::PROLOG_LABEL, llvm::TargetInstrInfo::storeRegToStackSlot(), and TII.

static int llvm::XCoreFrameLowering::stackSlotSize ( )

inlinestatic

Stack slot size (4 bytes)

Definition at line 52 of file XCoreFrameLowering.h.

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

Public Member Functions

Static Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation