#include "Target/M68k/M68kRegisterInfo.h"

Inheritance diagram for llvm::M68kRegisterInfo:

Collaboration diagram for llvm::M68kRegisterInfo:

Public Member Functions
	M68kRegisterInfo (const M68kSubtarget &Subtarget)

const MCPhysReg *	getCalleeSavedRegs (const MachineFunction *MF) const override

const uint32_t *	getCallPreservedMask (const MachineFunction &MF, CallingConv::ID) const override

const TargetRegisterClass *	getRegsForTailCall (const MachineFunction &MF) const
	Returns a register class with registers that can be used in forming tail calls. More...

unsigned	getMatchingMegaReg (unsigned Reg, const TargetRegisterClass *RC) const
	Return a mega-register of the specified register Reg so its sub-register of index SubIdx is Reg, its super(or mega) Reg. More...

const TargetRegisterClass *	getMaximalPhysRegClass (unsigned reg, MVT VT) const
	Returns the Register Class of a physical register of the given type, picking the biggest register class of the right type that contains this physreg. More...

int	getRegisterOrder (unsigned Reg, const TargetRegisterClass &TRC) const
	Return index of a register within a register class, otherwise return -1. More...

int	getSpillRegisterOrder (unsigned Reg) const
	Return spill order index of a register, if there is none then trap. More...

BitVector	getReservedRegs (const MachineFunction &MF) const override

bool	requiresRegisterScavenging (const MachineFunction &MF) const override

bool	trackLivenessAfterRegAlloc (const MachineFunction &MF) const override

void	eliminateFrameIndex (MachineBasicBlock::iterator II, int SPAdj, unsigned FIOperandNum, RegScavenger *RS=nullptr) const override
	FrameIndex represent objects inside a abstract stack. More...

bool	hasBasePointer (const MachineFunction &MF) const

bool	canRealignStack (const MachineFunction &MF) const override
	True if the stack can be realigned for the target. More...

Register	getFrameRegister (const MachineFunction &MF) const override

unsigned	getStackRegister () const

unsigned	getBaseRegister () const

unsigned	getGlobalBaseRegister () const

const TargetRegisterClass *	intRegClass (unsigned Size) const

Protected Attributes
const M68kSubtarget &	Subtarget

Detailed Description

Definition at line 30 of file M68kRegisterInfo.h.

Constructor & Destructor Documentation

◆ M68kRegisterInfo()

M68kRegisterInfo::M68kRegisterInfo ( const M68kSubtarget & Subtarget )

Definition at line 44 of file M68kRegisterInfo.cpp.

Member Function Documentation

◆ canRealignStack()

bool M68kRegisterInfo::canRealignStack ( const MachineFunction & MF ) const

override

True if the stack can be realigned for the target.

Definition at line 241 of file M68kRegisterInfo.cpp.

References llvm::TargetRegisterInfo::canRealignStack(), llvm::MachineRegisterInfo::canReserveReg(), CantUseSP(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getRegInfo(), and MRI.

◆ eliminateFrameIndex()

void M68kRegisterInfo::eliminateFrameIndex	(	MachineBasicBlock::iterator	II,
		int	SPAdj,
		unsigned	FIOperandNum,
		RegScavenger *	RS = `nullptr`
	)		const

override

FrameIndex represent objects inside a abstract stack.

We must replace FrameIndex with an stack/frame pointer direct reference.

Definition at line 164 of file M68kRegisterInfo.cpp.

References llvm::sampleprof::Base, llvm::MachineOperand::ChangeToImmediate(), getBaseRegister(), llvm::StackOffset::getFixed(), llvm::M68kFrameLowering::getFrameIndexReference(), llvm::MachineFunction::getFrameInfo(), llvm::MachineOperand::getImm(), llvm::MachineFrameInfo::getObjectOffset(), llvm::TargetFrameLowering::getOffsetOfLocalArea(), hasBasePointer(), llvm::M68kFrameLowering::hasFP(), int, and MI.

◆ getBaseRegister()

unsigned llvm::M68kRegisterInfo::getBaseRegister ( ) const

inline

Definition at line 101 of file M68kRegisterInfo.h.

Referenced by llvm::M68kFrameLowering::determineCalleeSaves(), eliminateFrameIndex(), llvm::M68kFrameLowering::emitPrologue(), llvm::M68kFrameLowering::getFrameIndexReference(), and getReservedRegs().

◆ getCalleeSavedRegs()

const MCPhysReg * M68kRegisterInfo::getCalleeSavedRegs ( const MachineFunction * MF ) const

override

Definition at line 59 of file M68kRegisterInfo.cpp.

◆ getCallPreservedMask()

const uint32_t * M68kRegisterInfo::getCallPreservedMask	(	const MachineFunction &	MF,
		CallingConv::ID
	)		const

override

Definition at line 64 of file M68kRegisterInfo.cpp.

Referenced by getReservedRegs().

◆ getFrameRegister()

Register M68kRegisterInfo::getFrameRegister ( const MachineFunction & MF ) const

override

Definition at line 260 of file M68kRegisterInfo.cpp.

References llvm::TargetSubtargetInfo::getFrameLowering(), llvm::MachineFunction::getSubtarget(), and llvm::TargetFrameLowering::hasFP().

Referenced by llvm::M68kFrameLowering::emitEpilogue(), llvm::M68kFrameLowering::emitPrologue(), and llvm::M68kFrameLowering::getFrameIndexReference().

◆ getGlobalBaseRegister()

unsigned llvm::M68kRegisterInfo::getGlobalBaseRegister ( ) const

inline

Definition at line 102 of file M68kRegisterInfo.h.

◆ getMatchingMegaReg()

unsigned M68kRegisterInfo::getMatchingMegaReg	(	unsigned	Reg,
		const TargetRegisterClass *	RC
	)		const

Return a mega-register of the specified register Reg so its sub-register of index SubIdx is Reg, its super(or mega) Reg.

In other words it will return a register that is not direct super register but still shares physical register with Reg. NOTE not sure about the term though.

Definition at line 75 of file M68kRegisterInfo.cpp.

References llvm::TargetRegisterClass::contains(), llvm::MCRegisterInfo::DiffListIterator::isValid(), and Reg.

Referenced by llvm::M68kInstrInfo::ExpandMOVEM(), llvm::M68kInstrInfo::ExpandMOVSZX_RR(), and llvm::M68kInstrInfo::ExpandMOVX_RR().