#include "Target/M68k/M68kRegisterInfo.h"

Inheritance 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.

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.

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.

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

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

BitVector	getReservedRegs (const MachineFunction &MF) const override

bool	requiresRegisterScavenging (const MachineFunction &MF) const override

bool	trackLivenessAfterRegAlloc (const MachineFunction &MF) const override

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

bool	hasBasePointer (const MachineFunction &MF) const

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

Register	getFrameRegister (const MachineFunction &MF) const override

const TargetRegisterClass *	getCrossCopyRegClass (const TargetRegisterClass *RC) 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 45 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 243 of file M68kRegisterInfo.cpp.

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

◆ eliminateFrameIndex()

bool 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 165 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(), II, and MI.

◆ getBaseRegister()

unsigned llvm::M68kRegisterInfo::getBaseRegister ( ) const

inline

Definition at line 109 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 60 of file M68kRegisterInfo.cpp.

◆ getCallPreservedMask()

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

override

Definition at line 65 of file M68kRegisterInfo.cpp.

Referenced by getReservedRegs().

◆ getCrossCopyRegClass()

const TargetRegisterClass * llvm::M68kRegisterInfo::getCrossCopyRegClass ( const TargetRegisterClass * RC ) const

inlineoverride

Definition at line 102 of file M68kRegisterInfo.h.

◆ getFrameRegister()

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

override

Definition at line 262 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 110 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 76 of file M68kRegisterInfo.cpp.

References llvm::TargetRegisterClass::contains().

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

◆ getMaximalPhysRegClass()

const TargetRegisterClass * M68kRegisterInfo::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.

Definition at line 85 of file M68kRegisterInfo.cpp.

References assert(), llvm::TargetRegisterClass::contains(), llvm::TargetRegisterClass::getNumRegs(), llvm::TargetRegisterClass::hasSubClass(), I, and llvm::Register::isPhysicalRegister().

◆ getRegisterOrder()

int M68kRegisterInfo::getRegisterOrder	(	unsigned	Reg,
		const TargetRegisterClass &	TRC
	)		const

Return index of a register within a register class, otherwise return -1.

Definition at line 106 of file M68kRegisterInfo.cpp.

References llvm::TargetRegisterClass::getNumRegs(), and llvm::TargetRegisterClass::getRegister().

Referenced by getSpillRegisterOrder().

◆ getRegsForTailCall()

const TargetRegisterClass * M68kRegisterInfo::getRegsForTailCall ( const MachineFunction & MF ) const

Returns a register class with registers that can be used in forming tail calls.

Definition at line 71 of file M68kRegisterInfo.cpp.

◆ getReservedRegs()

BitVector M68kRegisterInfo::getReservedRegs ( const MachineFunction & MF ) const

override

Definition at line 122 of file M68kRegisterInfo.cpp.

References CC, llvm::MachineOperand::clobbersPhysReg(), getBaseRegister(), llvm::Function::getCallingConv(), getCallPreservedMask(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getSubtarget(), hasBasePointer(), llvm::M68kFrameLowering::hasFP(), I, llvm::M68kSubtarget::isRegisterReservedByUser(), llvm::report_fatal_error(), llvm::Reserved, and llvm::Total.

◆ getSpillRegisterOrder()

int M68kRegisterInfo::getSpillRegisterOrder ( unsigned Reg ) const

Return spill order index of a register, if there is none then trap.

Definition at line 116 of file M68kRegisterInfo.cpp.

References assert(), getRegClass(), and getRegisterOrder().

Referenced by llvm::M68kInstrInfo::ExpandMOVEM().

◆ getStackRegister()

unsigned llvm::M68kRegisterInfo::getStackRegister ( ) const

inline

Definition at line 108 of file M68kRegisterInfo.h.

Referenced by llvm::M68kInstrInfo::ExpandPUSH_POP(), llvm::M68kFrameLowering::getFrameIndexReference(), and llvm::M68kFrameLowering::M68kFrameLowering().

◆ hasBasePointer()

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

Definition at line 228 of file M68kRegisterInfo.cpp.

References CantUseSP(), EnableBasePointer, and llvm::MachineFunction::getFrameInfo().

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

◆ intRegClass()

const TargetRegisterClass * M68kRegisterInfo::intRegClass ( unsigned Size ) const

Definition at line 267 of file M68kRegisterInfo.cpp.

◆ requiresRegisterScavenging()

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

override

Definition at line 214 of file M68kRegisterInfo.cpp.

◆ trackLivenessAfterRegAlloc()

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

override

Definition at line 219 of file M68kRegisterInfo.cpp.

Member Data Documentation

◆ Subtarget

const M68kSubtarget& llvm::M68kRegisterInfo::Subtarget

protected

Definition at line 48 of file M68kRegisterInfo.h.

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

lib/Target/M68k/M68kRegisterInfo.h
lib/Target/M68k/M68kRegisterInfo.cpp

Public Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ M68kRegisterInfo()

Member Function Documentation

◆ canRealignStack()

◆ eliminateFrameIndex()

◆ getBaseRegister()

◆ getCalleeSavedRegs()

◆ getCallPreservedMask()

◆ getCrossCopyRegClass()

◆ getFrameRegister()

◆ getGlobalBaseRegister()

◆ getMatchingMegaReg()

◆ getMaximalPhysRegClass()

◆ getRegisterOrder()

◆ getRegsForTailCall()

◆ getReservedRegs()

◆ getSpillRegisterOrder()

◆ getStackRegister()

◆ hasBasePointer()

◆ intRegClass()

◆ requiresRegisterScavenging()

◆ trackLivenessAfterRegAlloc()

Member Data Documentation

◆ Subtarget