llvm::PPCRegisterInfo Class Reference

#include <PPCRegisterInfo.h>

Inheritance diagram for llvm::PPCRegisterInfo:

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Collaboration diagram for llvm::PPCRegisterInfo:

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List of all members.

Public Member Functions
	PPCRegisterInfo (const PPCSubtarget &SubTarget, const TargetInstrInfo &tii)
const unsigned *	getCalleeSavedRegs (const MachineFunction *MF=0) const
	Code Generation virtual methods...
const TargetRegisterClass *const *	getCalleeSavedRegClasses (const MachineFunction *MF=0) const
BitVector	getReservedRegs (const MachineFunction &MF) const
bool	targetHandlesStackFrameRounding () const
bool	requiresRegisterScavenging (const MachineFunction &MF) const
bool	hasFP (const MachineFunction &MF) const
void	eliminateCallFramePseudoInstr (MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator I) const
void	lowerDynamicAlloc (MachineBasicBlock::iterator II, int SPAdj, RegScavenger *RS) const
void	lowerCRSpilling (MachineBasicBlock::iterator II, unsigned FrameIndex, int SPAdj, RegScavenger *RS) const
void	eliminateFrameIndex (MachineBasicBlock::iterator II, int SPAdj, RegScavenger *RS=NULL) const
void	determineFrameLayout (MachineFunction &MF) const
void	processFunctionBeforeCalleeSavedScan (MachineFunction &MF, RegScavenger *RS=NULL) const
void	emitPrologue (MachineFunction &MF) const
void	emitEpilogue (MachineFunction &MF, MachineBasicBlock &MBB) const
unsigned	getRARegister () const
unsigned	getFrameRegister (MachineFunction &MF) const
void	getInitialFrameState (std::vector< MachineMove > &Moves) const
unsigned	getEHExceptionRegister () const
unsigned	getEHHandlerRegister () const
int	getDwarfRegNum (unsigned RegNum, bool isEH) const
Static Public Member Functions
static unsigned	getRegisterNumbering (unsigned RegEnum)

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Detailed Description

Definition at line 27 of file PPCRegisterInfo.h.

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Constructor & Destructor Documentation

PPCRegisterInfo::PPCRegisterInfo	(	const PPCSubtarget &	SubTarget,
		const TargetInstrInfo &	tii
	)

Definition at line 119 of file PPCRegisterInfo.cpp.

References llvm::PPCISD::STD_32.

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Member Function Documentation

unsigned PPCRegisterInfo::getRegisterNumbering

(

unsigned

RegEnum

)

[static]

getRegisterNumbering - Given the enum value for some register, e.g. PPC::F14, return the number that it corresponds to (e.g. 14).

getRegisterNumbering - Given the enum value for some register, e.g. PPC::F14, return the number that it corresponds to (e.g. 14).

Definition at line 77 of file PPCRegisterInfo.cpp.

References llvm::cerr(), V0, and V1.

Referenced by HandleVRSaveUpdate(), and lowerCRSpilling().

const unsigned * PPCRegisterInfo::getCalleeSavedRegs

(

const MachineFunction *

MF = 0

)

const

Code Generation virtual methods...

Definition at line 141 of file PPCRegisterInfo.cpp.

References llvm::PPCSubtarget::isMachoABI(), and llvm::PPCSubtarget::isPPC64().

const TargetRegisterClass *const * PPCRegisterInfo::getCalleeSavedRegClasses

(

const MachineFunction *

MF = 0

)

const

Definition at line 229 of file PPCRegisterInfo.cpp.

References llvm::PPCSubtarget::isMachoABI(), and llvm::PPCSubtarget::isPPC64().

BitVector PPCRegisterInfo::getReservedRegs

(

const MachineFunction &

MF

)

const

Definition at line 344 of file PPCRegisterInfo.cpp.

References EnableRegisterScavenging, llvm::PPCSubtarget::isDarwin(), llvm::PPCSubtarget::isPPC64(), needsFP(), and llvm::BitVector::set().

bool llvm::PPCRegisterInfo::targetHandlesStackFrameRounding

(

)

const [inline]

targetHandlesStackFrameRounding - Returns true if the target is responsible for rounding up the stack frame (probably at emitPrologue time).

Definition at line 49 of file PPCRegisterInfo.h.

bool PPCRegisterInfo::requiresRegisterScavenging

(

const MachineFunction &

MF

)

const

requiresRegisterScavenging - We require a register scavenger. FIXME (64-bit): Should be inlined.

Definition at line 71 of file PPCRegisterInfo.cpp.

References EnableRegisterScavenging.

bool PPCRegisterInfo::hasFP

(

const MachineFunction &

MF

)

const

Definition at line 385 of file PPCRegisterInfo.cpp.

References llvm::MachineFunction::getFrameInfo(), llvm::MachineFrameInfo::getStackSize(), MFI, and needsFP().

Referenced by eliminateFrameIndex(), emitEpilogue(), emitPrologue(), and getFrameRegister().

void PPCRegisterInfo::eliminateCallFramePseudoInstr	(	MachineFunction &	MF,
		MachineBasicBlock &	MBB,
		MachineBasicBlock::iterator	I
	)			const

Definition at line 407 of file PPCRegisterInfo.cpp.

References llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), llvm::BuildMI(), llvm::MachineBasicBlock::erase(), llvm::TargetInstrInfo::get(), llvm::isInt16(), llvm::PPCSubtarget::isPPC64(), MBBI, and llvm::PerformTailCallOpt.

void PPCRegisterInfo::lowerDynamicAlloc	(	MachineBasicBlock::iterator	II,
		int	SPAdj,
		RegScavenger *	RS
	)			const

lowerDynamicAlloc - Generate the code for allocating an object in the current frame. The sequence of code with be in the general form

addi R0, SP, frameSize ; get the address of the previous frame stwxu R0, SP, Rnegsize ; add and update the SP with the negated size addi Rnew, SP, maxCalFrameSize ; get the top of the allocation

Definition at line 463 of file PPCRegisterInfo.cpp.

References llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), llvm::BuildMI(), EnableRegisterScavenging, llvm::MachineBasicBlock::erase(), findScratchRegister(), llvm::TargetInstrInfo::get(), llvm::TargetMachine::getFrameInfo(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFrameInfo::getMaxAlignment(), llvm::MachineFrameInfo::getMaxCallFrameSize(), llvm::MachineInstr::getOperand(), llvm::MachineBasicBlock::getParent(), llvm::MachineInstr::getParent(), llvm::MachineOperand::getReg(), llvm::TargetFrameInfo::getStackAlignment(), llvm::MachineFrameInfo::getStackSize(), llvm::MachineFunction::getTarget(), llvm::isInt16(), llvm::MachineOperand::isKill(), llvm::PPCSubtarget::isPPC64(), MBB, MF, MFI, MI, and Reg.

Referenced by eliminateFrameIndex().

void PPCRegisterInfo::lowerCRSpilling	(	MachineBasicBlock::iterator	II,
		unsigned	FrameIndex,
		int	SPAdj,
		RegScavenger *	RS
	)			const

lowerCRSpilling - Generate the code for spilling a CR register. Instead of reserving a whole register (R0), we scrounge for one here. This generates code like this:

mfcr rA ; Move the conditional register into GPR rA. rlwinm rA, rA, SB, 0, 31 ; Shift the bits left so they are in CR0's slot. stw rA, FI ; Store rA to the frame.

Definition at line 577 of file PPCRegisterInfo.cpp.

References llvm::addFrameReference(), llvm::MachineInstrBuilder::addImm(), llvm::BuildMI(), llvm::MachineBasicBlock::erase(), findScratchRegister(), llvm::TargetInstrInfo::get(), llvm::MachineOperand::getImm(), llvm::MachineInstr::getOperand(), llvm::MachineInstr::getParent(), llvm::MachineOperand::getReg(), getRegisterNumbering(), llvm::MachineOperand::isKill(), llvm::PPCSubtarget::isPPC64(), MBB, llvm::PPCISD::MFCR, MI, and Reg.

Referenced by eliminateFrameIndex().

void PPCRegisterInfo::eliminateFrameIndex	(	MachineBasicBlock::iterator	II,
		int	SPAdj,
		RegScavenger *	RS = NULL
	)			const

Definition at line 618 of file PPCRegisterInfo.cpp.

References llvm::MachineInstrBuilder::addImm(), llvm::BuildMI(), llvm::MachineOperand::ChangeToImmediate(), llvm::MachineOperand::ChangeToRegister(), llvm::PPCISD::DYNALLOC, EnableRegisterScavenging, FI, findScratchRegister(), FrameIndex, llvm::TargetInstrInfo::get(), llvm::MachineFunction::getFrameInfo(), llvm::PPCFunctionInfo::getFramePointerSaveIndex(), llvm::MachineOperand::getImm(), llvm::MachineOperand::getIndex(), llvm::MachineFunction::getInfo(), llvm::MachineInstr::getNumOperands(), llvm::MachineFrameInfo::getObjectOffset(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::MachineBasicBlock::getParent(), llvm::MachineInstr::getParent(), llvm::MachineOperand::getReg(), llvm::MachineFrameInfo::getStackSize(), hasFP(), llvm::TargetInstrInfo::INLINEASM, llvm::MachineOperand::isFI(), llvm::isInt16(), lowerCRSpilling(), lowerDynamicAlloc(), MBB, MF, MFI, MI, Offset, llvm::MachineInstr::setDesc(), and llvm::PPCISD::STD_32.

void PPCRegisterInfo::determineFrameLayout

(

MachineFunction &

MF

)

const

determineFrameLayout - Determine the size of the frame and maximum call frame size.

determineFrameLayout - Determine the size of the frame and maximum call frame size.

Definition at line 881 of file PPCRegisterInfo.cpp.

References ALIGN_STACK, llvm::TargetMachine::getFrameInfo(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFrameInfo::getMaxAlignment(), llvm::MachineFrameInfo::getMaxCallFrameSize(), llvm::PPCFrameInfo::getMinCallFrameSize(), llvm::TargetFrameInfo::getStackAlignment(), llvm::MachineFrameInfo::getStackSize(), llvm::MachineFunction::getTarget(), llvm::MachineFrameInfo::hasCalls(), llvm::MachineFrameInfo::hasVarSizedObjects(), llvm::PPCSubtarget::isMachoABI(), llvm::PPCSubtarget::isPPC64(), MFI, llvm::MachineFrameInfo::setMaxCallFrameSize(), and llvm::MachineFrameInfo::setStackSize().

Referenced by emitPrologue().

void PPCRegisterInfo::processFunctionBeforeCalleeSavedScan	(	MachineFunction &	MF,
		RegScavenger *	RS = NULL
	)			const

Definition at line 933 of file PPCRegisterInfo.cpp.

References llvm::MachineFrameInfo::CreateFixedObject(), llvm::MachineFrameInfo::CreateStackObject(), EnableRegisterScavenging, FI, llvm::TargetRegisterClass::getAlignment(), llvm::MachineFunction::getFrameInfo(), llvm::PPCFunctionInfo::getFramePointerSaveIndex(), llvm::PPCFrameInfo::getFramePointerSaveOffset(), llvm::MachineFunction::getInfo(), getRARegister(), llvm::MachineFunction::getRegInfo(), llvm::TargetRegisterClass::getSize(), llvm::PPCFunctionInfo::getTailCallSPDelta(), llvm::MachineFrameInfo::hasVarSizedObjects(), llvm::PPCSubtarget::isELF32_ABI(), llvm::PPCSubtarget::isMachoABI(), llvm::PPCSubtarget::isPPC64(), MFI, MustSaveLR(), needsFP(), llvm::NoFramePointerElim, llvm::PerformTailCallOpt, llvm::PPCFunctionInfo::setFramePointerSaveIndex(), llvm::PPCFunctionInfo::setMustSaveLR(), llvm::MachineRegisterInfo::setPhysRegUnused(), llvm::RegScavenger::setScavengingFrameIndex(), and spillsCR().

void PPCRegisterInfo::emitPrologue

(

MachineFunction &

MF

)

const

Definition at line 985 of file PPCRegisterInfo.cpp.

References llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), ALIGN_STACK, llvm::MachineBasicBlock::begin(), llvm::BuildMI(), llvm::ISD::DBG_LABEL, determineFrameLayout(), llvm::Function::doesNotThrow(), E, llvm::MachineBasicBlock::end(), FI, llvm::MachineFunction::front(), llvm::TargetInstrInfo::get(), llvm::MachineFrameInfo::getCalleeSavedInfo(), llvm::TargetMachine::getFrameInfo(), llvm::MachineFunction::getFrameInfo(), llvm::MachineModuleInfo::getFrameMoves(), llvm::PPCFrameInfo::getFramePointerSaveOffset(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), llvm::MachineFrameInfo::getMachineModuleInfo(), llvm::MachineFrameInfo::getMaxAlignment(), llvm::MachineFrameInfo::getObjectOffset(), llvm::PPCFrameInfo::getReturnSaveOffset(), llvm::TargetFrameInfo::getStackAlignment(), llvm::MachineFrameInfo::getStackSize(), llvm::MachineFunction::getTarget(), HandleVRSaveUpdate(), llvm::MachineModuleInfo::hasDebugInfo(), hasFP(), I, llvm::isInt16(), llvm::PPCSubtarget::isMachoABI(), llvm::isPowerOf2_32(), llvm::PPCSubtarget::isPPC64(), llvm::Log2_32(), MBB, MBBI, MFI, MMI, llvm::PPCFunctionInfo::mustSaveLR(), MustSaveLR(), llvm::MachineModuleInfo::NextLabelID(), Offset, llvm::ISD::OR, Reg, llvm::UnwindTablesMandatory, and llvm::MachineLocation::VirtualFP.

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

Definition at line 1201 of file PPCRegisterInfo.cpp.

References llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), ALIGN_STACK, llvm::BuildMI(), llvm::MachineBasicBlock::end(), llvm::CallingConv::Fast, FI, llvm::TargetInstrInfo::get(), llvm::Function::getCallingConv(), llvm::TargetMachine::getFrameInfo(), llvm::MachineFunction::getFrameInfo(), llvm::PPCFrameInfo::getFramePointerSaveOffset(), llvm::MachineFunction::getFunction(), llvm::MachineOperand::getImm(), llvm::MachineFunction::getInfo(), llvm::MachineFrameInfo::getMaxAlignment(), llvm::PPCFunctionInfo::getMinReservedArea(), llvm::PPCFrameInfo::getReturnSaveOffset(), llvm::TargetFrameInfo::getStackAlignment(), llvm::MachineFrameInfo::getStackSize(), llvm::PPCFunctionInfo::getTailCallSPDelta(), llvm::MachineFunction::getTarget(), llvm::PPCFunctionInfo::hasFastCall(), hasFP(), llvm::MachineFrameInfo::hasVarSizedObjects(), llvm::MachineOperand::isImm(), llvm::isInt16(), llvm::PPCSubtarget::isMachoABI(), llvm::PPCSubtarget::isPPC64(), MBBI, MFI, llvm::PPCFunctionInfo::mustSaveLR(), MustSaveLR(), llvm::PerformTailCallOpt, and llvm::prior().

unsigned PPCRegisterInfo::getRARegister

(

)

const

Definition at line 1395 of file PPCRegisterInfo.cpp.

References llvm::PPCSubtarget::isPPC64().

Referenced by processFunctionBeforeCalleeSavedScan().

unsigned PPCRegisterInfo::getFrameRegister

(

MachineFunction &

MF

)

const

Definition at line 1399 of file PPCRegisterInfo.cpp.

References hasFP(), and llvm::PPCSubtarget::isPPC64().

void PPCRegisterInfo::getInitialFrameState

(

std::vector< MachineMove > &

Moves

)

const

Definition at line 1406 of file PPCRegisterInfo.cpp.

References Src, and llvm::MachineLocation::VirtualFP.

unsigned PPCRegisterInfo::getEHExceptionRegister

(

)

const

Definition at line 1414 of file PPCRegisterInfo.cpp.

References llvm::PPCSubtarget::isPPC64().

unsigned PPCRegisterInfo::getEHHandlerRegister

(

)

const

Definition at line 1418 of file PPCRegisterInfo.cpp.

References llvm::PPCSubtarget::isPPC64().

int PPCRegisterInfo::getDwarfRegNum	(	unsigned	RegNum,
		bool	isEH
	)			const

Definition at line 1422 of file PPCRegisterInfo.cpp.

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

• PPCRegisterInfo.h
• PPCRegisterInfo.cpp