llvm::SparcFrameLowering Class Reference

#include <SparcFrameLowering.h>

Inheritance diagram for llvm::SparcFrameLowering:

Collaboration diagram for llvm::SparcFrameLowering:

List of all members.

Public Member Functions
	SparcFrameLowering (const SparcSubtarget &ST)
void	emitPrologue (MachineFunction &MF) const override
void	emitEpilogue (MachineFunction &MF, MachineBasicBlock &MBB) const override
void	eliminateCallFramePseudoInstr (MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator I) const override
bool	hasReservedCallFrame (const MachineFunction &MF) const override
bool	hasFP (const MachineFunction &MF) const override
void	processFunctionBeforeCalleeSavedScan (MachineFunction &MF, RegScavenger *RS=nullptr) const override

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Detailed Description

Definition at line 23 of file SparcFrameLowering.h.

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Constructor & Destructor Documentation

SparcFrameLowering::SparcFrameLowering

(

const SparcSubtarget &

ST

)

[explicit]

Definition at line 36 of file SparcFrameLowering.cpp.

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Member Function Documentation

void SparcFrameLowering::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::TargetFrameLowering.

Definition at line 136 of file SparcFrameLowering.cpp.

References llvm::MachineBasicBlock::erase(), llvm::MachineOperand::getImm(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), hasReservedCallFrame(), I, and llvm::AArch64CC::MI.

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

Implements llvm::TargetFrameLowering.

Definition at line 151 of file SparcFrameLowering.cpp.

References llvm::MachineInstrBuilder::addReg(), llvm::BuildMI(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getInfo(), llvm::TargetSubtargetInfo::getInstrInfo(), llvm::MachineBasicBlock::getLastNonDebugInstr(), llvm::MachineFrameInfo::getStackSize(), llvm::TargetMachine::getSubtarget(), llvm::MachineFunction::getSubtarget(), llvm::MachineFunction::getTarget(), and llvm::SparcMachineFunctionInfo::isLeafProc().

void SparcFrameLowering::emitPrologue

(

MachineFunction &

MF

)

const [override, virtual]

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

Implements llvm::TargetFrameLowering.

Definition at line 85 of file SparcFrameLowering.cpp.

References llvm::MachineModuleInfo::addFrameInst(), llvm::BuildMI(), llvm::TargetOpcode::CFI_INSTRUCTION, llvm::MCCFIInstruction::createDefCfaRegister(), llvm::MCCFIInstruction::createRegister(), llvm::MCCFIInstruction::createWindowSave(), llvm::MachineFunction::front(), llvm::MachineModuleInfo::getContext(), llvm::MCRegisterInfo::getDwarfRegNum(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getInfo(), llvm::TargetSubtargetInfo::getInstrInfo(), llvm::MachineFunction::getMMI(), llvm::MCContext::getRegisterInfo(), llvm::MachineFrameInfo::getStackSize(), llvm::TargetMachine::getSubtarget(), llvm::MachineFunction::getSubtarget(), llvm::MachineFunction::getTarget(), and llvm::SparcMachineFunctionInfo::isLeafProc().

bool SparcFrameLowering::hasFP

(

const MachineFunction &

MF

)

const [override, 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 184 of file SparcFrameLowering.cpp.

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

bool SparcFrameLowering::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::TargetFrameLowering.

Definition at line 176 of file SparcFrameLowering.cpp.

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

Referenced by eliminateCallFramePseudoInstr().

void SparcFrameLowering::processFunctionBeforeCalleeSavedScan	(	MachineFunction &	MF,
		RegScavenger *	RS = nullptr
	)		const [override, 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 253 of file SparcFrameLowering.cpp.

References DisableLeafProc, llvm::MachineFunction::getInfo(), and llvm::SparcMachineFunctionInfo::setLeafProc().

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

• SparcFrameLowering.h
• SparcFrameLowering.cpp