#include <MSP430FrameLowering.h>

Inheritance diagram for llvm::MSP430FrameLowering:

Collaboration diagram for llvm::MSP430FrameLowering:

Public Member Functions
	MSP430FrameLowering (const MSP430Subtarget &sti)
void	emitPrologue (MachineFunction &MF) const
void	emitEpilogue (MachineFunction &MF, MachineBasicBlock &MBB) const
void	eliminateCallFramePseudoInstr (MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator I) 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
bool	hasFP (const MachineFunction &MF) const
bool	hasReservedCallFrame (const MachineFunction &MF) const
void	processFunctionBeforeFrameFinalized (MachineFunction &MF, RegScavenger *RS=NULL) const
Protected Attributes
const MSP430Subtarget &	STI

Detailed Description

Definition at line 24 of file MSP430FrameLowering.h.

Constructor & Destructor Documentation

llvm::MSP430FrameLowering::MSP430FrameLowering ( const MSP430Subtarget & sti ) [inline, explicit]

Definition at line 29 of file MSP430FrameLowering.h.

Member Function Documentation

void MSP430FrameLowering::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 226 of file MSP430FrameLowering.cpp.

References llvm::MachineInstrBuilder::addImm(), llvm::BuildMI(), llvm::MachineBasicBlock::erase(), llvm::MachineInstr::getDebugLoc(), llvm::MachineOperand::getImm(), llvm::TargetMachine::getInstrInfo(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::TargetFrameLowering::getStackAlignment(), llvm::MachineFunction::getTarget(), hasReservedCallFrame(), I, llvm::MachineBasicBlock::insert(), llvm::MachineOperand::setIsDead(), and TII.

void MSP430FrameLowering::emitEpilogue	(	MachineFunction &	MF,
		MachineBasicBlock &	MBB
	)		const `[virtual]`

void MSP430FrameLowering::emitPrologue ( MachineFunction & MF ) const [virtual]

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

Implements llvm::TargetFrameLowering.

Definition at line 41 of file MSP430FrameLowering.cpp.

References llvm::MachineInstrBuilder::addImm(), llvm::MachineBasicBlock::begin(), llvm::MachineFunction::begin(), llvm::BuildMI(), llvm::MachineBasicBlock::end(), llvm::MachineFunction::end(), llvm::MachineFunction::front(), llvm::DebugLoc::get(), llvm::MSP430MachineFunctionInfo::getCalleeSavedFrameSize(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getInfo(), llvm::TargetMachine::getInstrInfo(), llvm::MachineInstr::getOperand(), llvm::MachineFrameInfo::getStackSize(), llvm::MachineFunction::getTarget(), hasFP(), I, llvm::RegState::Kill, llvm::A64CC::MI, llvm::next(), llvm::MachineOperand::setIsDead(), llvm::MachineFrameInfo::setOffsetAdjustment(), and TII.

bool MSP430FrameLowering::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 29 of file MSP430FrameLowering.cpp.

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

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

bool MSP430FrameLowering::hasReservedCallFrame ( const MachineFunction & MF ) const [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 37 of file MSP430FrameLowering.cpp.

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

Referenced by eliminateCallFramePseudoInstr().

void MSP430FrameLowering::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 288 of file MSP430FrameLowering.cpp.

References llvm::MachineFrameInfo::CreateFixedObject(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFrameInfo::getObjectIndexBegin(), and hasFP().

bool MSP430FrameLowering::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 206 of file MSP430FrameLowering.cpp.

References llvm::BuildMI(), llvm::MachineBasicBlock::end(), llvm::MCInstrInfo::get(), llvm::TargetMachine::getInstrInfo(), llvm::MachineBasicBlock::getParent(), llvm::MachineFunction::getTarget(), and TII.

bool MSP430FrameLowering::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 180 of file MSP430FrameLowering.cpp.

References llvm::MachineBasicBlock::addLiveIn(), llvm::BuildMI(), llvm::MachineBasicBlock::end(), llvm::MCInstrInfo::get(), llvm::MachineFunction::getInfo(), llvm::TargetMachine::getInstrInfo(), llvm::MachineBasicBlock::getParent(), llvm::MachineFunction::getTarget(), llvm::RegState::Kill, llvm::MSP430MachineFunctionInfo::setCalleeSavedFrameSize(), and TII.

Member Data Documentation

const MSP430Subtarget& llvm::MSP430FrameLowering::STI [protected]

Definition at line 26 of file MSP430FrameLowering.h.

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

Public Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation