llvm::Thumb1FrameLowering Class Reference

#include <Thumb1FrameLowering.h>

Inheritance diagram for llvm::Thumb1FrameLowering:

Collaboration diagram for llvm::Thumb1FrameLowering:

List of all members.

Public Member Functions
	Thumb1FrameLowering (const ARMSubtarget &sti)
void	emitPrologue (MachineFunction &MF) const override
void	emitEpilogue (MachineFunction &MF, MachineBasicBlock &MBB) const override
bool	spillCalleeSavedRegisters (MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, const std::vector< CalleeSavedInfo > &CSI, const TargetRegisterInfo *TRI) const override
bool	restoreCalleeSavedRegisters (MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, const std::vector< CalleeSavedInfo > &CSI, const TargetRegisterInfo *TRI) const override
bool	hasReservedCallFrame (const MachineFunction &MF) const override
void	eliminateCallFramePseudoInstr (MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator MI) const override

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Detailed Description

Definition at line 24 of file Thumb1FrameLowering.h.

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Constructor & Destructor Documentation

Thumb1FrameLowering::Thumb1FrameLowering

(

const ARMSubtarget &

sti

)

[explicit]

Definition at line 24 of file Thumb1FrameLowering.cpp.

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Member Function Documentation

void Thumb1FrameLowering::eliminateCallFramePseudoInstr	(	MachineFunction &	MF,
		MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator	MI
	)		const [override, 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::ARMFrameLowering.

Definition at line 52 of file Thumb1FrameLowering.cpp.

References Align(), emitSPUpdate(), llvm::MachineBasicBlock::erase(), llvm::MachineInstr::getDebugLoc(), llvm::MachineOperand::getImm(), llvm::TargetSubtargetInfo::getInstrInfo(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::TargetSubtargetInfo::getRegisterInfo(), llvm::TargetFrameLowering::getStackAlignment(), llvm::MachineFunction::getSubtarget(), hasReservedCallFrame(), I, and TII.

void Thumb1FrameLowering::emitEpilogue	(	MachineFunction &	MF,
		MachineBasicBlock &	MBB
	)		const [override, virtual]

Reimplemented from llvm::ARMFrameLowering.

Definition at line 318 of file Thumb1FrameLowering.cpp.

References llvm::AddDefaultPred(), llvm::MachineInstrBuilder::addReg(), Align(), llvm::MachineBasicBlock::begin(), llvm::BuildMI(), llvm::MachineInstrBuilder::copyImplicitOps(), llvm::RegState::Define, emitSPUpdate(), llvm::emitThumbRegPlusImmediate(), llvm::MachineBasicBlock::erase(), FramePtr, llvm::MachineBasicBlock::front(), llvm::ARMFunctionInfo::getArgRegsSaveSize(), llvm::MachineFrameInfo::getCalleeSavedInfo(), llvm::ARMFunctionInfo::getDPRCalleeSavedAreaSize(), llvm::MachineFunction::getFrameInfo(), llvm::TargetSubtargetInfo::getFrameLowering(), llvm::ARMFunctionInfo::getFramePtrSpillOffset(), llvm::ARMFunctionInfo::getGPRCalleeSavedArea1Size(), llvm::ARMFunctionInfo::getGPRCalleeSavedArea2Size(), llvm::MachineFunction::getInfo(), llvm::TargetSubtargetInfo::getInstrInfo(), llvm::MachineBasicBlock::getLastNonDebugInstr(), llvm::MachineInstr::getOpcode(), llvm::MachineFunction::getRegInfo(), llvm::TargetSubtargetInfo::getRegisterInfo(), llvm::ARMFunctionInfo::getReturnRegsCount(), llvm::TargetFrameLowering::getStackAlignment(), llvm::MachineFrameInfo::getStackSize(), llvm::MachineFunction::getSubtarget(), llvm::TargetMachine::getSubtargetImpl(), llvm::MachineFunction::getTarget(), llvm::ARMFunctionInfo::hasStackFrame(), llvm::ARMSubtarget::hasV4TOps(), llvm::ARMSubtarget::hasV5TOps(), isCSRestore(), llvm::MachineRegisterInfo::isPhysRegUsed(), llvm::RegState::Kill, llvm::ARMFunctionInfo::shouldRestoreSPFromFP(), llvm::ARMFrameLowering::STI, TII, and llvm::tryFoldSPUpdateIntoPushPop().

void Thumb1FrameLowering::emitPrologue

(

MachineFunction &

MF

)

const [override, virtual]

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

Reimplemented from llvm::ARMFrameLowering.

Definition at line 85 of file Thumb1FrameLowering.cpp.

References llvm::AddDefaultPred(), llvm::MachineInstrBuilder::addImm(), Align(), llvm::MachineBasicBlock::begin(), llvm::BuildMI(), llvm::TargetOpcode::CFI_INSTRUCTION, llvm::MCCFIInstruction::createDefCfa(), llvm::MCCFIInstruction::createDefCfaOffset(), llvm::MCCFIInstruction::createDefCfaRegister(), llvm::MCCFIInstruction::createOffset(), emitSPUpdate(), llvm::MachineBasicBlock::end(), FramePtr, llvm::MachineInstr::FrameSetup, llvm::MachineFunction::front(), llvm::ARMFunctionInfo::getArgRegsSaveSize(), llvm::ARMBaseRegisterInfo::getBaseRegister(), llvm::MachineFrameInfo::getCalleeSavedInfo(), llvm::MCRegisterInfo::getDwarfRegNum(), llvm::MachineFunction::getFrameInfo(), llvm::TargetSubtargetInfo::getFrameLowering(), llvm::ARMFunctionInfo::getFramePtrSpillOffset(), llvm::ARMBaseRegisterInfo::getFrameRegister(), llvm::MachineFunction::getInfo(), llvm::TargetSubtargetInfo::getInstrInfo(), llvm::MachineFunction::getMMI(), llvm::MachineFrameInfo::getObjectOffset(), llvm::MachineFrameInfo::getOffsetAdjustment(), llvm::TargetSubtargetInfo::getRegisterInfo(), llvm::TargetFrameLowering::getStackAlignment(), llvm::MachineFrameInfo::getStackSize(), llvm::MachineFunction::getSubtarget(), llvm::TargetMachine::getSubtargetImpl(), llvm::MachineFunction::getTarget(), llvm::ARMBaseRegisterInfo::hasBasePointer(), llvm::ARMFrameLowering::hasFP(), llvm::ARMFunctionInfo::hasStackFrame(), llvm::MachineFrameInfo::hasVarSizedObjects(), I, llvm::ARMSubtarget::isTargetELF(), llvm::ARMSubtarget::isTargetMachO(), llvm::ARMBaseRegisterInfo::needsStackRealignment(), llvm::report_fatal_error(), llvm::ARMFunctionInfo::setDPRCalleeSavedAreaOffset(), llvm::ARMFunctionInfo::setDPRCalleeSavedAreaSize(), llvm::ARMFunctionInfo::setFramePtrSpillOffset(), llvm::ARMFunctionInfo::setGPRCalleeSavedArea1Offset(), llvm::ARMFunctionInfo::setGPRCalleeSavedArea1Size(), llvm::ARMFunctionInfo::setGPRCalleeSavedArea2Offset(), llvm::ARMFunctionInfo::setGPRCalleeSavedArea2Size(), llvm::MachineInstrBuilder::setMIFlags(), llvm::MachineFrameInfo::setOffsetAdjustment(), llvm::ARMFunctionInfo::setShouldRestoreSPFromFP(), llvm::MachineFrameInfo::setStackSize(), llvm::ARMFrameLowering::STI, TII, and llvm::tryFoldSPUpdateIntoPushPop().

bool Thumb1FrameLowering::hasReservedCallFrame

(

const MachineFunction &

MF

)

const [override, virtual]

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. This eliminates the need for add/sub sp brackets around call sites. Returns true if the call frame is included as part of the stack frame.

Reimplemented from llvm::ARMFrameLowering.

Definition at line 27 of file Thumb1FrameLowering.cpp.

References llvm::MachineFunction::getFrameInfo(), llvm::MachineFrameInfo::getMaxCallFrameSize(), and llvm::MachineFrameInfo::hasVarSizedObjects().

Referenced by eliminateCallFramePseudoInstr().

bool Thumb1FrameLowering::restoreCalleeSavedRegisters	(	MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator	MI,
		const std::vector< CalleeSavedInfo > &	CSI,
		const TargetRegisterInfo *	TRI
	)		const [override, 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::ARMFrameLowering.

Definition at line 493 of file Thumb1FrameLowering.cpp.

References llvm::AddDefaultPred(), llvm::MachineInstrBuilder::addReg(), llvm::BuildMI(), llvm::MachineInstrBuilder::copyImplicitOps(), llvm::MachineFunction::DeleteMachineInstr(), llvm::MachineBasicBlock::erase(), llvm::DebugLoc::get(), llvm::ARMFunctionInfo::getArgRegsSaveSize(), llvm::getDefRegState(), llvm::MachineFunction::getInfo(), llvm::TargetSubtargetInfo::getInstrInfo(), llvm::MachineBasicBlock::getParent(), llvm::MachineFunction::getSubtarget(), llvm::ARMSubtarget::hasV4TOps(), llvm::ARMSubtarget::hasV5TOps(), llvm::MachineBasicBlock::insert(), llvm::ARMFrameLowering::STI, and TII.

bool Thumb1FrameLowering::spillCalleeSavedRegisters	(	MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator	MI,
		const std::vector< CalleeSavedInfo > &	CSI,
		const TargetRegisterInfo *	TRI
	)		const [override, 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::ARMFrameLowering.

Definition at line 454 of file Thumb1FrameLowering.cpp.

References llvm::AddDefaultPred(), llvm::MachineBasicBlock::addLiveIn(), llvm::MachineInstrBuilder::addReg(), llvm::BuildMI(), llvm::MachineBasicBlock::end(), llvm::MachineInstr::FrameSetup, llvm::MCInstrInfo::get(), llvm::MachineFunction::getFrameInfo(), llvm::TargetSubtargetInfo::getInstrInfo(), llvm::getKillRegState(), llvm::MachineBasicBlock::getParent(), llvm::MachineFunction::getRegInfo(), llvm::MachineFunction::getSubtarget(), llvm::MachineRegisterInfo::isLiveIn(), llvm::MachineFrameInfo::isReturnAddressTaken(), llvm::MachineInstrBuilder::setMIFlags(), and TII.

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

• Thumb1FrameLowering.h
• Thumb1FrameLowering.cpp