llvm::MachineRegisterInfo Class Reference

#include <MachineRegisterInfo.h>

Collaboration diagram for llvm::MachineRegisterInfo:

[legend]

List of all members.

Public Types
typedef defusechain_iterator < true, true >	reg_iterator
typedef defusechain_iterator < false, true >	def_iterator
	def_iterator/def_begin/def_end - Walk all defs of the specified register.
typedef defusechain_iterator < true, false >	use_iterator
	use_iterator/use_begin/use_end - Walk all uses of the specified register.
typedef std::vector< std::pair < unsigned, unsigned > >::const_iterator	livein_iterator
typedef std::vector< unsigned > ::const_iterator	liveout_iterator
Public Member Functions
	MachineRegisterInfo (const TargetRegisterInfo &TRI)
	~MachineRegisterInfo ()
reg_iterator	reg_begin (unsigned RegNo) const
def_iterator	def_begin (unsigned RegNo) const
use_iterator	use_begin (unsigned RegNo) const
bool	use_empty (unsigned RegNo) const
void	replaceRegWith (unsigned FromReg, unsigned ToReg)
MachineOperand *&	getRegUseDefListHead (unsigned RegNo)
MachineOperand *	getRegUseDefListHead (unsigned RegNo) const
MachineInstr *	getVRegDef (unsigned Reg) const
void	dumpUses (unsigned RegNo) const
const TargetRegisterClass *	getRegClass (unsigned Reg) const
void	setRegClass (unsigned Reg, const TargetRegisterClass *RC)
unsigned	createVirtualRegister (const TargetRegisterClass *RegClass)
unsigned	getLastVirtReg () const
std::vector< unsigned > &	getRegClassVirtRegs (const TargetRegisterClass *RC)
bool	isPhysRegUsed (unsigned Reg) const
void	setPhysRegUsed (unsigned Reg)
void	setPhysRegUnused (unsigned Reg)
void	addLiveIn (unsigned Reg, unsigned vreg=0)
void	addLiveOut (unsigned Reg)
livein_iterator	livein_begin () const
livein_iterator	livein_end () const
bool	livein_empty () const
liveout_iterator	liveout_begin () const
liveout_iterator	liveout_end () const
bool	liveout_empty () const
bool	isLiveIn (unsigned Reg) const
Static Public Member Functions
static reg_iterator	reg_end ()
static def_iterator	def_end ()
static use_iterator	use_end ()
Classes
class	defusechain_iterator

---

Detailed Description

MachineRegisterInfo - Keep track of information for virtual and physical registers, including vreg register classes, use/def chains for registers, etc.

Definition at line 27 of file MachineRegisterInfo.h.

---

Member Typedef Documentation

typedef defusechain_iterator<true,true> llvm::MachineRegisterInfo::reg_iterator

reg_iterator/reg_begin/reg_end - Walk all defs and uses of the specified register.

Definition at line 74 of file MachineRegisterInfo.h.

typedef defusechain_iterator<false,true> llvm::MachineRegisterInfo::def_iterator

def_iterator/def_begin/def_end - Walk all defs of the specified register.

Definition at line 85 of file MachineRegisterInfo.h.

typedef defusechain_iterator<true,false> llvm::MachineRegisterInfo::use_iterator

use_iterator/use_begin/use_end - Walk all uses of the specified register.

Definition at line 92 of file MachineRegisterInfo.h.

typedef std::vector<std::pair<unsigned,unsigned> >::const_iterator llvm::MachineRegisterInfo::livein_iterator

Definition at line 212 of file MachineRegisterInfo.h.

typedef std::vector<unsigned>::const_iterator llvm::MachineRegisterInfo::liveout_iterator

Definition at line 213 of file MachineRegisterInfo.h.

---

Constructor & Destructor Documentation

MachineRegisterInfo::MachineRegisterInfo

(

const TargetRegisterInfo &

TRI

)

[explicit]

Definition at line 17 of file MachineRegisterInfo.cpp.

References llvm::TargetRegisterInfo::getNumRegClasses(), llvm::TargetRegisterInfo::getNumRegs(), and llvm::BitVector::resize().

MachineRegisterInfo::~MachineRegisterInfo

(

)

Definition at line 27 of file MachineRegisterInfo.cpp.

References second, and llvm::BitVector::size().

Referenced by llvm::MachineFunction::~MachineFunction().

---

Member Function Documentation

reg_iterator llvm::MachineRegisterInfo::reg_begin

(

unsigned

RegNo

)

const [inline]

Definition at line 79 of file MachineRegisterInfo.h.

References getRegUseDefListHead().

Referenced by llvm::LiveIntervals::addIntervalsForSpillsFast(), getConflictWeight(), llvm::LiveIntervals::getNumConflictsWithPhysReg(), getVRegDef(), replaceRegWith(), and llvm::LiveIntervals::spillPhysRegAroundRegDefsUses().

static reg_iterator llvm::MachineRegisterInfo::reg_end

(

)

[inline, static]

Definition at line 82 of file MachineRegisterInfo.h.

Referenced by llvm::LiveIntervals::addIntervalsForSpillsFast(), getConflictWeight(), llvm::LiveIntervals::getNumConflictsWithPhysReg(), getVRegDef(), replaceRegWith(), and llvm::LiveIntervals::spillPhysRegAroundRegDefsUses().

def_iterator llvm::MachineRegisterInfo::def_begin

(

unsigned

RegNo

)

const [inline]

Definition at line 86 of file MachineRegisterInfo.h.

References getRegUseDefListHead().

Referenced by llvm::X86InstrInfo::isReallyTriviallyReMaterializable(), MustSaveLR(), and regIsPICBase().

static def_iterator llvm::MachineRegisterInfo::def_end

(

)

[inline, static]

Definition at line 89 of file MachineRegisterInfo.h.

Referenced by llvm::X86InstrInfo::isReallyTriviallyReMaterializable(), MustSaveLR(), and regIsPICBase().

use_iterator llvm::MachineRegisterInfo::use_begin

(

unsigned

RegNo

)

const [inline]

Definition at line 93 of file MachineRegisterInfo.h.

References getRegUseDefListHead().

Referenced by dumpUses(), EmitLiveInCopy(), isLiveInButUnusedBefore(), and use_empty().

static use_iterator llvm::MachineRegisterInfo::use_end

(

)

[inline, static]

Definition at line 96 of file MachineRegisterInfo.h.

Referenced by dumpUses(), EmitLiveInCopy(), isLiveInButUnusedBefore(), and use_empty().

bool llvm::MachineRegisterInfo::use_empty

(

unsigned

RegNo

)

const [inline]

use_empty - Return true if there are no instructions using the specified register.

Definition at line 100 of file MachineRegisterInfo.h.

References use_begin(), and use_end().

Referenced by llvm::SimpleRegisterCoalescing::runOnMachineFunction().

void MachineRegisterInfo::replaceRegWith	(	unsigned	FromReg,
		unsigned	ToReg
	)

replaceRegWith - Replace all instances of FromReg with ToReg in the machine function. This is like llvm-level X->replaceAllUsesWith(Y), except that it also changes any definitions of the register as well.

replaceRegWith - Replace all instances of FromReg with ToReg in the machine function. This is like llvm-level X->replaceAllUsesWith(Y), except that it also changes any definitions of the register as well.

Definition at line 73 of file MachineRegisterInfo.cpp.

References E, I, reg_begin(), reg_end(), and llvm::MachineOperand::setReg().

MachineOperand*& llvm::MachineRegisterInfo::getRegUseDefListHead

(

unsigned

RegNo

)

[inline]

getRegUseDefListHead - Return the head pointer for the register use/def list for the specified virtual or physical register.

Definition at line 110 of file MachineRegisterInfo.h.

References llvm::TargetRegisterInfo::FirstVirtualRegister.

Referenced by def_begin(), reg_begin(), and use_begin().

MachineOperand* llvm::MachineRegisterInfo::getRegUseDefListHead

(

unsigned

RegNo

)

const [inline]

Definition at line 117 of file MachineRegisterInfo.h.

References llvm::TargetRegisterInfo::FirstVirtualRegister.

MachineInstr * MachineRegisterInfo::getVRegDef

(

unsigned

Reg

)

const

getVRegDef - Return the machine instr that defines the specified virtual register or null if none is found. This assumes that the code is in SSA form, so there should only be one definition.

getVRegDef - Return the machine instr that defines the specified virtual register or null if none is found. This assumes that the code is in SSA form, so there should only be one definition.

Definition at line 88 of file MachineRegisterInfo.cpp.

References E, llvm::TargetRegisterInfo::FirstVirtualRegister, I, reg_begin(), and reg_end().

Referenced by llvm::LiveVariables::HandleVirtRegUse(), interferes(), isSourceDefinedByImplicitDef(), and llvm::LiveVariables::runOnMachineFunction().

void MachineRegisterInfo::dumpUses

(

unsigned

RegNo

)

const

Definition at line 101 of file MachineRegisterInfo.cpp.

References E, I, use_begin(), and use_end().

const TargetRegisterClass* llvm::MachineRegisterInfo::getRegClass

(

unsigned

Reg

)

const [inline]

getRegClass - Return the register class of the specified virtual register.

Definition at line 139 of file MachineRegisterInfo.h.

References llvm::TargetRegisterInfo::FirstVirtualRegister.

Referenced by llvm::LiveIntervals::addIntervalsForSpills(), llvm::LiveIntervals::addIntervalsForSpillsFast(), llvm::VirtRegMap::assignVirt2StackSlot(), EmitLiveInCopies(), llvm::ScheduleDAGSDNodes::EmitNode(), llvm::FastISel::FastEmitInst_extractsubreg(), and llvm::FastISel::UpdateValueMap().

void llvm::MachineRegisterInfo::setRegClass	(	unsigned	Reg,
		const TargetRegisterClass *	RC
	)			[inline]

setRegClass - Set the register class of the specified virtual register.

Definition at line 147 of file MachineRegisterInfo.h.

References llvm::TargetRegisterInfo::FirstVirtualRegister, llvm::TargetRegisterClass::getID(), I, and VR.

unsigned MachineRegisterInfo::createVirtualRegister

(

const TargetRegisterClass *

RegClass

)

createVirtualRegister - Create and return a new virtual register in the function with the specified register class.

createVirtualRegister - Create and return a new virtual register in the function with the specified register class.

Definition at line 42 of file MachineRegisterInfo.cpp.

References llvm::TargetRegisterClass::getID(), getLastVirtReg(), and VR.

Referenced by llvm::LiveIntervals::addIntervalsForSpillsFast(), AddLiveIn(), llvm::X86InstrInfo::convertToThreeAddress(), llvm::FastISel::createResultReg(), llvm::PPCTargetLowering::EmitAtomicBinary(), llvm::ScheduleDAG::EmitCrossRCCopy(), llvm::X86TargetLowering::EmitInstrWithCustomInserter(), llvm::PPCTargetLowering::EmitInstrWithCustomInserter(), llvm::AlphaTargetLowering::EmitInstrWithCustomInserter(), llvm::PPCTargetLowering::EmitPartwordAtomicBinary(), llvm::X86InstrInfo::getGlobalBaseReg(), llvm::SelectionDAGLowering::GetRegistersForValue(), llvm::SparcTargetLowering::LowerArguments(), llvm::IA64TargetLowering::LowerArguments(), LowerCTPOP(), LowerFORMAL_ARGUMENT(), LowerFORMAL_ARGUMENTS(), LowerLOAD(), LowerSTORE(), LowerVECTOR_SHUFFLE(), llvm::SelectionDAGISel::MakeReg(), and llvm::FunctionLoweringInfo::MakeReg().

unsigned llvm::MachineRegisterInfo::getLastVirtReg

(

)

const [inline]

getLastVirtReg - Return the highest currently assigned virtual register.

Definition at line 171 of file MachineRegisterInfo.h.

References llvm::TargetRegisterInfo::FirstVirtualRegister.

Referenced by createVirtualRegister(), llvm::VirtRegMap::grow(), llvm::VirtRegMap::print(), and llvm::VirtRegMap::VirtRegMap().

std::vector<unsigned>& llvm::MachineRegisterInfo::getRegClassVirtRegs

(

const TargetRegisterClass *

RC

)

[inline]

getRegClassVirtRegs - Return the list of virtual registers of the given target register class.

Definition at line 177 of file MachineRegisterInfo.h.

References llvm::TargetRegisterClass::getID().

bool llvm::MachineRegisterInfo::isPhysRegUsed

(

unsigned

Reg

)

const [inline]

isPhysRegUsed - Return true if the specified register is used in this function. This only works after register allocation.

Definition at line 187 of file MachineRegisterInfo.h.

Referenced by llvm::IA64RegisterInfo::emitPrologue(), HandleVRSaveUpdate(), llvm::XCoreRegisterInfo::processFunctionBeforeCalleeSavedScan(), and llvm::ARMRegisterInfo::processFunctionBeforeCalleeSavedScan().

void llvm::MachineRegisterInfo::setPhysRegUsed

(

unsigned

Reg

)

[inline]

setPhysRegUsed - Mark the specified register used in this function. This should only be called during and after register allocation.

Definition at line 191 of file MachineRegisterInfo.h.

Referenced by llvm::ARMRegisterInfo::processFunctionBeforeCalleeSavedScan().

void llvm::MachineRegisterInfo::setPhysRegUnused

(

unsigned

Reg

)

[inline]

setPhysRegUnused - Mark the specified register unused in this function. This should only be called during and after register allocation.

Definition at line 195 of file MachineRegisterInfo.h.

Referenced by llvm::XCoreRegisterInfo::processFunctionBeforeCalleeSavedScan(), llvm::SPURegisterInfo::processFunctionBeforeCalleeSavedScan(), and llvm::PPCRegisterInfo::processFunctionBeforeCalleeSavedScan().

void llvm::MachineRegisterInfo::addLiveIn	(	unsigned	Reg,
		unsigned	vreg = 0
	)			[inline]

addLiveIn/Out - Add the specified register as a live in/out. Note that it is an error to add the same register to the same set more than once.

Definition at line 204 of file MachineRegisterInfo.h.

Referenced by AddLiveIn(), llvm::SparcTargetLowering::LowerArguments(), llvm::IA64TargetLowering::LowerArguments(), LowerFORMAL_ARGUMENT(), and LowerFORMAL_ARGUMENTS().

void llvm::MachineRegisterInfo::addLiveOut

(

unsigned

Reg

)

[inline]

Definition at line 207 of file MachineRegisterInfo.h.

Referenced by llvm::IA64TargetLowering::LowerArguments(), and LowerRET().

livein_iterator llvm::MachineRegisterInfo::livein_begin

(

)

const [inline]

Definition at line 214 of file MachineRegisterInfo.h.

Referenced by EmitLiveInCopies(), llvm::X86RegisterInfo::emitPrologue(), llvm::ARMRegisterInfo::emitPrologue(), HandleVRSaveUpdate(), isLiveIn(), llvm::MachineFunction::print(), and llvm::SelectionDAGISel::runOnFunction().

livein_iterator llvm::MachineRegisterInfo::livein_end

(

)

const [inline]

Definition at line 215 of file MachineRegisterInfo.h.

Referenced by EmitLiveInCopies(), llvm::X86RegisterInfo::emitPrologue(), llvm::ARMRegisterInfo::emitPrologue(), HandleVRSaveUpdate(), isLiveIn(), llvm::MachineFunction::print(), and llvm::SelectionDAGISel::runOnFunction().

bool llvm::MachineRegisterInfo::livein_empty

(

)

const [inline]

Definition at line 216 of file MachineRegisterInfo.h.

Referenced by llvm::MachineFunction::print().

liveout_iterator llvm::MachineRegisterInfo::liveout_begin

(

)

const [inline]

Definition at line 217 of file MachineRegisterInfo.h.

Referenced by HandleVRSaveUpdate(), LowerRET(), llvm::MachineFunction::print(), and llvm::LiveVariables::runOnMachineFunction().

liveout_iterator llvm::MachineRegisterInfo::liveout_end

(

)

const [inline]

Definition at line 218 of file MachineRegisterInfo.h.

Referenced by HandleVRSaveUpdate(), LowerRET(), llvm::MachineFunction::print(), and llvm::LiveVariables::runOnMachineFunction().

bool llvm::MachineRegisterInfo::liveout_empty

(

)

const [inline]

Definition at line 219 of file MachineRegisterInfo.h.

Referenced by LowerRET(), and llvm::MachineFunction::print().

bool llvm::MachineRegisterInfo::isLiveIn

(

unsigned

Reg

)

const [inline]

Definition at line 221 of file MachineRegisterInfo.h.

References E, I, livein_begin(), and livein_end().

---

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

• MachineRegisterInfo.h
• MachineRegisterInfo.cpp