llvm::Thumb1FrameLowering Class Reference

#include <Thumb1FrameLowering.h>

Inheritance diagram for llvm::Thumb1FrameLowering:

Collaboration diagram for llvm::Thumb1FrameLowering:

Public Member Functions
	Thumb1FrameLowering (const ARMSubtarget &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
bool	hasReservedCallFrame (const MachineFunction &MF) const
void	eliminateCallFramePseudoInstr (MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator MI) const
Public Member Functions inherited from llvm::ARMFrameLowering
	ARMFrameLowering (const ARMSubtarget &sti)
bool	hasFP (const MachineFunction &MF) const
bool	canSimplifyCallFramePseudos (const MachineFunction &MF) const
int	getFrameIndexReference (const MachineFunction &MF, int FI, unsigned &FrameReg) const
int	ResolveFrameIndexReference (const MachineFunction &MF, int FI, unsigned &FrameReg, int SPAdj) const
int	getFrameIndexOffset (const MachineFunction &MF, int FI) const
void	processFunctionBeforeCalleeSavedScan (MachineFunction &MF, RegScavenger *RS) 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 void	processFunctionBeforeFrameFinalized (MachineFunction &MF, RegScavenger *RS=NULL) const

Additional Inherited Members
Public Types inherited from llvm::TargetFrameLowering
enum	StackDirection { StackGrowsUp, StackGrowsDown }
Protected Attributes inherited from llvm::ARMFrameLowering
const ARMSubtarget &	STI

Detailed Description

Definition at line 27 of file Thumb1FrameLowering.h.

Constructor & Destructor Documentation

llvm::Thumb1FrameLowering::Thumb1FrameLowering ( const ARMSubtarget &  sti )

inlineexplicit

Definition at line 29 of file Thumb1FrameLowering.h.

Member Function Documentation

void Thumb1FrameLowering::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::ARMFrameLowering.

Definition at line 48 of file Thumb1FrameLowering.cpp.

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

void Thumb1FrameLowering::emitEpilogue ( MachineFunction &  MF, MachineBasicBlock &  MBB  ) const

virtual

Reimplemented from llvm::ARMFrameLowering.

Definition at line 241 of file Thumb1FrameLowering.cpp.

References llvm::AddDefaultPred(), llvm::MachineInstrBuilder::addReg(), Align(), llvm::MachineBasicBlock::begin(), llvm::BuildMI(), llvm::MachineInstrBuilder::copyImplicitOps(), llvm::RegState::Define, llvm::emitSPUpdate(), llvm::emitThumbRegPlusImmediate(), llvm::MachineBasicBlock::end(), llvm::MachineBasicBlock::erase(), llvm::MachineBasicBlock::front(), llvm::ARMFunctionInfo::getArgRegsSaveSize(), llvm::ARMFunctionInfo::getDPRCalleeSavedAreaSize(), llvm::MachineFunction::getFrameInfo(), llvm::TargetMachine::getFrameLowering(), llvm::ARMFunctionInfo::getFramePtrSpillOffset(), llvm::ARMFunctionInfo::getGPRCalleeSavedArea1Size(), llvm::ARMFunctionInfo::getGPRCalleeSavedArea2Size(), llvm::MachineFunction::getInfo(), llvm::TargetMachine::getInstrInfo(), llvm::MachineBasicBlock::getLastNonDebugInstr(), llvm::MachineFunction::getRegInfo(), llvm::TargetMachine::getRegisterInfo(), llvm::TargetFrameLowering::getStackAlignment(), llvm::MachineFrameInfo::getStackSize(), llvm::MachineFunction::getTarget(), llvm::ARMFunctionInfo::hasStackFrame(), isCSRestore(), llvm::MachineRegisterInfo::isPhysRegUsed(), llvm::RegState::Kill, llvm::prior(), R4, llvm::ARMFunctionInfo::shouldRestoreSPFromFP(), TII, and llvm::tryFoldSPUpdateIntoPushPop().

void Thumb1FrameLowering::emitPrologue ( MachineFunction &  MF ) const

virtual

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

Reimplemented from llvm::ARMFrameLowering.

Definition at line 81 of file Thumb1FrameLowering.cpp.

References llvm::AddDefaultPred(), llvm::MachineInstrBuilder::addImm(), Align(), llvm::MachineBasicBlock::begin(), llvm::BuildMI(), llvm::emitSPUpdate(), llvm::MachineBasicBlock::end(), llvm::MachineInstr::FrameSetup, llvm::MachineFunction::front(), llvm::ARMFunctionInfo::getArgRegsSaveSize(), llvm::MachineFrameInfo::getCalleeSavedInfo(), llvm::MachineFunction::getFrameInfo(), llvm::TargetMachine::getFrameLowering(), llvm::ARMFunctionInfo::getFramePtrSpillOffset(), llvm::MachineFunction::getInfo(), llvm::TargetMachine::getInstrInfo(), llvm::MachineFrameInfo::getObjectOffset(), llvm::MachineFrameInfo::getOffsetAdjustment(), llvm::TargetMachine::getRegisterInfo(), llvm::TargetFrameLowering::getStackAlignment(), llvm::MachineFrameInfo::getStackSize(), llvm::MachineFunction::getTarget(), llvm::ARMFrameLowering::hasFP(), llvm::ARMFunctionInfo::hasStackFrame(), llvm::MachineFrameInfo::hasVarSizedObjects(), llvm::ARMSubtarget::isTargetELF(), llvm::ARMSubtarget::isTargetIOS(), llvm::prior(), R4, R6, 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

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 23 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

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 373 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::TargetMachine::getInstrInfo(), llvm::MachineBasicBlock::getParent(), llvm::MachineFunction::getTarget(), llvm::MachineBasicBlock::insert(), and TII.

bool Thumb1FrameLowering::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::ARMFrameLowering.

Definition at line 334 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::TargetMachine::getInstrInfo(), llvm::getKillRegState(), llvm::MachineBasicBlock::getParent(), llvm::MachineFunction::getRegInfo(), llvm::MachineFunction::getTarget(), 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