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

Detailed Description

Definition at line 24 of file XCoreFrameLowering.h.

Constructor & Destructor Documentation

XCoreFrameLowering::XCoreFrameLowering ( const XCoreSubtarget & STI )

Definition at line 80 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 303 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(), llvm::ARM_PROC::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 90 of file XCoreFrameLowering.cpp.

References llvm::MachineBasicBlock::addLiveIn(), llvm::MachineBasicBlock::begin(), llvm::BuildMI(), llvm::MCContext::CreateTempSymbol(), llvm::MachineBasicBlock::end(), llvm::MachineFunction::front(), llvm::Function::getAttributes(), llvm::MachineModuleInfo::getContext(), llvm::XCoreFunctionInfo::getFPSpillSlot(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), llvm::TargetMachine::getInstrInfo(), llvm::XCoreFunctionInfo::getLRSpillSlot(), llvm::MachineFunction::getMMI(), llvm::MachineFrameInfo::getObjectOffset(), llvm::MachineFrameInfo::getStackSize(), llvm::MachineFunction::getTarget(), llvm::XCoreFunctionInfo::getUsesLR(), llvm::AttributeSet::hasAttrSomewhere(), hasFP(), isImmU16(), isImmU6(), loadFromStack(), 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 85 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 353 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 269 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 235 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 ( ) [inline, static]

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

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation