LLVM: llvm::MCRegisterInfo Class Reference (original) (raw)

MCRegisterInfo base class - We assume that the target defines a static array of MCRegisterDesc objects that represent all of the machine registers that the target has. More...

#include "[llvm/MC/MCRegisterInfo.h](MCRegisterInfo%5F8h%5Fsource.html)"

Public Member Functions
iterator_range< MCSubRegIterator >	subregs (MCRegister Reg) const
	Return an iterator range over all sub-registers of Reg, excluding Reg.
iterator_range< MCSubRegIterator >	subregs_inclusive (MCRegister Reg) const
	Return an iterator range over all sub-registers of Reg, including Reg.
iterator_range< MCSuperRegIterator >	superregs (MCRegister Reg) const
	Return an iterator range over all super-registers of Reg, excluding Reg.
iterator_range< MCSuperRegIterator >	superregs_inclusive (MCRegister Reg) const
	Return an iterator range over all super-registers of Reg, including Reg.
detail::concat_range< const MCPhysReg, iterator_range< MCSubRegIterator >, iterator_range< MCSuperRegIterator > >	sub_and_superregs_inclusive (MCRegister Reg) const
	Return an iterator range over all sub- and super-registers of Reg, including Reg.
iota_range< MCRegUnit >	regunits () const
	Returns an iterator range over all regunits.
iterator_range< MCRegUnitIterator >	regunits (MCRegister Reg) const
	Returns an iterator range over all regunits for Reg.
virtual	~MCRegisterInfo ()=default
void	InitMCRegisterInfo (const MCRegisterDesc D, unsigned NR, unsigned RA, unsigned PC, const MCRegisterClass C, unsigned NC, const MCPhysReg(RURoots)[2], unsigned NRU, const int16_t DL, const LaneBitmask RUMS, const char Strings, const char ClassStrings, const uint16_t SubIndices, unsigned NumIndices, const uint16_t *RET)
	Initialize MCRegisterInfo, called by TableGen auto-generated routines.
void	mapLLVMRegsToDwarfRegs (const DwarfLLVMRegPair *Map, unsigned Size, bool isEH)
	Used to initialize LLVM register to Dwarf register number mapping.
void	mapDwarfRegsToLLVMRegs (const DwarfLLVMRegPair *Map, unsigned Size, bool isEH)
	Used to initialize Dwarf register to LLVM register number mapping.
void	mapLLVMRegToSEHReg (MCRegister LLVMReg, int SEHReg)
	mapLLVMRegToSEHReg - Used to initialize LLVM register to SEH register number mapping.
void	mapLLVMRegToCVReg (MCRegister LLVMReg, int CVReg)
MCRegister	getRARegister () const
	This method should return the register where the return address can be found.
MCRegister	getProgramCounter () const
	Return the register which is the program counter.
const MCRegisterDesc &	operator[] (MCRegister Reg) const
const MCRegisterDesc &	get (MCRegister Reg) const
	Provide a get method, equivalent to [], but more useful with a pointer to this object.
MCRegister	getSubReg (MCRegister Reg, unsigned Idx) const
	Returns the physical register number of sub-register "Index" for physical register RegNo.
MCRegister	getMatchingSuperReg (MCRegister Reg, unsigned SubIdx, const MCRegisterClass *RC) const
	Return a super-register of the specified register Reg so its sub-register of index SubIdx is Reg.
unsigned	getSubRegIndex (MCRegister RegNo, MCRegister SubRegNo) const
	For a given register pair, return the sub-register index if the second register is a sub-register of the first.
const char *	getName (MCRegister RegNo) const
	Return the human-readable symbolic target-specific name for the specified physical register.
bool	isConstant (MCRegister RegNo) const
	Returns true if the given register is constant.
bool	isArtificial (MCRegister RegNo) const
	Returns true if the given register is artificial, which means it represents a regunit that is not separately addressable but still needs to be modelled, such as the top 16-bits of a 32-bit GPR.
bool	isArtificialRegUnit (MCRegUnit Unit) const
	Returns true when the given register unit is considered artificial.
unsigned	getNumRegs () const
	Return the number of registers this target has (useful for sizing arrays holding per register information)
unsigned	getNumSubRegIndices () const
	Return the number of sub-register indices understood by the target.
unsigned	getNumRegUnits () const
	Return the number of (native) register units in the target.
virtual int64_t	getDwarfRegNum (MCRegister Reg, bool isEH) const
	Map a target register to an equivalent dwarf register number.
std::optional< MCRegister >	getLLVMRegNum (uint64_t RegNum, bool isEH) const
	Map a dwarf register back to a target register.
int64_t	getDwarfRegNumFromDwarfEHRegNum (uint64_t RegNum) const
	Map a target EH register number to an equivalent DWARF register number.
int	getSEHRegNum (MCRegister Reg) const
	Map a target register to an equivalent SEH register number.
int	getCodeViewRegNum (MCRegister Reg) const
	Map a target register to an equivalent CodeView register number.
regclass_iterator	regclass_begin () const
regclass_iterator	regclass_end () const
iterator_range< regclass_iterator >	regclasses () const
unsigned	getNumRegClasses () const
const MCRegisterClass &	getRegClass (unsigned i) const
	Returns the register class associated with the enumeration value.
const char *	getRegClassName (const MCRegisterClass *Class) const
uint16_t	getEncodingValue (MCRegister Reg) const
	Returns the encoding for Reg.
bool	isSubRegister (MCRegister RegA, MCRegister RegB) const
	Returns true if RegB is a sub-register of RegA.
bool	isSuperRegister (MCRegister RegA, MCRegister RegB) const
	Returns true if RegB is a super-register of RegA.
bool	isSubRegisterEq (MCRegister RegA, MCRegister RegB) const
	Returns true if RegB is a sub-register of RegA or if RegB == RegA.
bool	isSuperRegisterEq (MCRegister RegA, MCRegister RegB) const
	Returns true if RegB is a super-register of RegA or if RegB == RegA.
bool	isSuperOrSubRegisterEq (MCRegister RegA, MCRegister RegB) const
	Returns true if RegB is a super-register or sub-register of RegA or if RegB == RegA.
bool	regsOverlap (MCRegister RegA, MCRegister RegB) const
	Returns true if the two registers are equal or alias each other.

Friends
class	MCSubRegIterator
class	MCSubRegIndexIterator
class	MCSuperRegIterator
class	MCRegUnitIterator
class	MCRegUnitMaskIterator
class	MCRegUnitRootIterator
class	MCRegAliasIterator

MCRegisterInfo base class - We assume that the target defines a static array of MCRegisterDesc objects that represent all of the machine registers that the target has.

As such, we simply have to track a pointer to this array so that we can turn register number into a register descriptor.

Note this class is designed to be a base class of TargetRegisterInfo, which is the interface used by codegen. However, specific targets should never specialize this class. MCRegisterInfo should only contain getters to access TableGen generated physical register data. It must not be extended with virtual methods.

Definition at line 151 of file MCRegisterInfo.h.

◆ regclass_iterator

virtual llvm::MCRegisterInfo::~MCRegisterInfo ( )	virtualdefault

◆ get()

Provide a get method, equivalent to [], but more useful with a pointer to this object.

Definition at line 379 of file MCRegisterInfo.h.

References operator , and Reg.

Referenced by getName(), llvm::LLVMDisasmContext::getRegisterInfo(), getSubReg(), getSubRegIndex(), isArtificial(), isConstant(), llvm::MCRegUnitIterator::MCRegUnitIterator(), llvm::MCRegUnitMaskIterator::MCRegUnitMaskIterator(), llvm::MCSubRegIndexIterator::MCSubRegIndexIterator(), llvm::MCSubRegIterator::MCSubRegIterator(), and llvm::MCSuperRegIterator::MCSuperRegIterator().

◆ getCodeViewRegNum()

int MCRegisterInfo::getCodeViewRegNum	(	MCRegister	Reg	)	const

◆ getDwarfRegNum()

int64_t MCRegisterInfo::getDwarfRegNum ( MCRegister Reg, bool isEH ) const	virtual

◆ getDwarfRegNumFromDwarfEHRegNum()

int64_t MCRegisterInfo::getDwarfRegNumFromDwarfEHRegNum	(	uint64_t	RegNum	)	const

◆ getEncodingValue()

◆ getLLVMRegNum()

◆ getMatchingSuperReg()

◆ getName()

◆ getNumRegClasses()

unsigned llvm::MCRegisterInfo::getNumRegClasses ( ) const	inline

◆ getNumRegs()

unsigned llvm::MCRegisterInfo::getNumRegs ( ) const	inline

◆ getNumRegUnits()

unsigned llvm::MCRegisterInfo::getNumRegUnits ( ) const	inline

◆ getNumSubRegIndices()

unsigned llvm::MCRegisterInfo::getNumSubRegIndices ( ) const	inline

◆ getProgramCounter()

MCRegister llvm::MCRegisterInfo::getProgramCounter ( ) const	inline

◆ getRARegister()

MCRegister llvm::MCRegisterInfo::getRARegister ( ) const	inline

◆ getRegClass()

◆ getRegClassName()

◆ getSEHRegNum()

int MCRegisterInfo::getSEHRegNum	(	MCRegister	Reg	)	const

Map a target register to an equivalent SEH register number.

Returns LLVM register number if there is no equivalent value.

Definition at line 194 of file MCRegisterInfo.cpp.

References I.

◆ getSubReg()

Returns the physical register number of sub-register "Index" for physical register RegNo.

Return zero if the sub-register does not exist.

Definition at line 116 of file MCRegisterInfo.cpp.

References assert(), get(), getNumSubRegIndices(), llvm::Sub, llvm::MCRegisterDesc::SubRegIndices, and subregs().

Referenced by addSavedGPR(), getMatchingSuperReg(), getPairedGPR(), llvm::HexagonAsmPrinter::HexagonProcessInstruction(), llvm::PPCRegisterInfo::lowerACCSpilling(), llvm::PPCRegisterInfo::lowerDMRRestore(), and llvm::PPCRegisterInfo::lowerDMRSpilling().

◆ getSubRegIndex()

◆ InitMCRegisterInfo()

void llvm::MCRegisterInfo::InitMCRegisterInfo ( const MCRegisterDesc * D, unsigned NR, unsigned RA, unsigned PC, const MCRegisterClass * C, unsigned NC, const MCPhysReg() _RURoots_[2], unsigned NRU, const int16_t DL, const LaneBitmask * RUMS, const char * Strings, const char * ClassStrings, const uint16_t * SubIndices, unsigned NumIndices, const uint16_t * RET )	inline

◆ isArtificial()

bool llvm::MCRegisterInfo::isArtificial ( MCRegister RegNo) const	inline

◆ isArtificialRegUnit()

bool MCRegisterInfo::isArtificialRegUnit	(	MCRegUnit	Unit	)	const

◆ isConstant()

bool llvm::MCRegisterInfo::isConstant ( MCRegister RegNo) const	inline

◆ isSubRegister()

◆ isSubRegisterEq()

◆ isSuperOrSubRegisterEq()

◆ isSuperRegister()

◆ isSuperRegisterEq()

◆ mapDwarfRegsToLLVMRegs()

Used to initialize Dwarf register to LLVM register number mapping.

Called by TableGen auto-generated routines. DO NOT USE.

Definition at line 336 of file MCRegisterInfo.h.

References Size.

◆ mapLLVMRegsToDwarfRegs()

Used to initialize LLVM register to Dwarf register number mapping.

Called by TableGen auto-generated routines. DO NOT USE.

Definition at line 322 of file MCRegisterInfo.h.

References Size.

◆ mapLLVMRegToCVReg()

void llvm::MCRegisterInfo::mapLLVMRegToCVReg ( MCRegister LLVMReg, int CVReg )	inline

◆ mapLLVMRegToSEHReg()

void llvm::MCRegisterInfo::mapLLVMRegToSEHReg ( MCRegister LLVMReg, int SEHReg )	inline

mapLLVMRegToSEHReg - Used to initialize LLVM register to SEH register number mapping.

By default the SEH register number is just the same as the LLVM register number. FIXME: TableGen these numbers. Currently this requires target specific initialization code.

Definition at line 352 of file MCRegisterInfo.h.

◆ operator[]()

◆ regclass_begin()

regclass_iterator llvm::MCRegisterInfo::regclass_begin ( ) const	inline

◆ regclass_end()

regclass_iterator llvm::MCRegisterInfo::regclass_end ( ) const	inline

◆ regclasses()

◆ regsOverlap()

◆ regunits() [1/2]

iota_range< MCRegUnit > llvm::MCRegisterInfo::regunits ( ) const	inline

◆ regunits() [2/2]

◆ sub_and_superregs_inclusive()

◆ subregs()

◆ subregs_inclusive()

◆ superregs()

Return an iterator range over all super-registers of Reg, excluding Reg.

Definition at line 791 of file MCRegisterInfo.h.

References llvm::make_range(), MCSuperRegIterator, and Reg.

Referenced by llvm::TargetRegisterInfo::checkAllSuperRegsMarked(), getHexagonRegisterPair(), getMatchingSuperReg(), getPairedGPR(), llvm::getSuperReg(), llvm::isSuperReg(), isSuperRegister(), and sub_and_superregs_inclusive().