#include <VirtRegMap.h>

Inheritance diagram for llvm::VirtRegMap:

Collaboration diagram for llvm::VirtRegMap:

Public Types
enum	{ NO_PHYS_REG = 0, NO_STACK_SLOT = (1L << 30)-1, MAX_STACK_SLOT = (1L << 18)-1 }

Public Member Functions
	VirtRegMap ()

virtual bool	runOnMachineFunction (MachineFunction &MF)

virtual void	getAnalysisUsage (AnalysisUsage &AU) const

MachineFunction &	getMachineFunction () const

MachineRegisterInfo &	getRegInfo () const

const TargetRegisterInfo &	getTargetRegInfo () const

void	grow ()

bool	hasPhys (unsigned virtReg) const
	returns true if the specified virtual register is mapped to a physical register More...

unsigned	getPhys (unsigned virtReg) const
	returns the physical register mapped to the specified virtual register More...

void	assignVirt2Phys (unsigned virtReg, unsigned physReg)
	creates a mapping for the specified virtual register to the specified physical register More...

void	clearVirt (unsigned virtReg)
	clears the specified virtual register's, physical register mapping More...

void	clearAllVirt ()
	clears all virtual to physical register mappings More...

bool	hasPreferredPhys (unsigned VirtReg)
	returns true if VirtReg is assigned to its preferred physreg. More...

bool	hasKnownPreference (unsigned VirtReg)
	returns true if VirtReg has a known preferred register. This returns false if VirtReg has a preference that is a virtual register that hasn't been assigned yet. More...

void	setIsSplitFromReg (unsigned virtReg, unsigned SReg)
	records virtReg is a split live interval from SReg. More...

unsigned	getPreSplitReg (unsigned virtReg) const
	returns the live interval virtReg is split from. More...

unsigned	getOriginal (unsigned VirtReg) const

bool	isAssignedReg (unsigned virtReg) const
	returns true if the specified virtual register is not mapped to a stack slot or rematerialized. More...

int	getStackSlot (unsigned virtReg) const
	returns the stack slot mapped to the specified virtual register More...

int	assignVirt2StackSlot (unsigned virtReg)
	create a mapping for the specifed virtual register to the next available stack slot More...

void	assignVirt2StackSlot (unsigned virtReg, int frameIndex)
	create a mapping for the specified virtual register to the specified stack slot More...

void	print (raw_ostream &OS, const Module *M=0) const

void	dump () const

Public Member Functions inherited from llvm::FunctionPass
	FunctionPass (char &pid)

Pass *	createPrinterPass (raw_ostream &O, const std::string &Banner) const
	createPrinterPass - Get a function printer pass. More...

virtual void	assignPassManager (PMStack &PMS, PassManagerType T)

virtual PassManagerType	getPotentialPassManagerType () const
	Return what kind of Pass Manager can manage this pass. More...

Public Member Functions inherited from llvm::Pass
	Pass (PassKind K, char &pid)

virtual	~Pass ()

PassKind	getPassKind () const

virtual const char *	getPassName () const

AnalysisID	getPassID () const
	getPassID - Return the PassID number that corresponds to this pass. More...

virtual bool	doInitialization (Module &)

virtual bool	doFinalization (Module &)

void	dump () const

virtual void	preparePassManager (PMStack &)
	Check if available pass managers are suitable for this pass or not. More...

void	setResolver (AnalysisResolver *AR)

AnalysisResolver *	getResolver () const

virtual void	releaseMemory ()

virtual void *	getAdjustedAnalysisPointer (AnalysisID ID)

virtual ImmutablePass *	getAsImmutablePass ()

virtual PMDataManager *	getAsPMDataManager ()

virtual void	verifyAnalysis () const

virtual void	dumpPassStructure (unsigned Offset=0)

template<typename AnalysisType >
AnalysisType *	getAnalysisIfAvailable () const

bool	mustPreserveAnalysisID (char &AID) const

template<typename AnalysisType >
AnalysisType &	getAnalysis () const

template<typename AnalysisType >
AnalysisType &	getAnalysis (Function &F)

template<typename AnalysisType >
AnalysisType &	getAnalysisID (AnalysisID PI) const

template<typename AnalysisType >
AnalysisType &	getAnalysisID (AnalysisID PI, Function &F)

Static Public Attributes
static char	ID = 0

Additional Inherited Members
Static Public Member Functions inherited from llvm::Pass
static const PassInfo *	lookupPassInfo (const void *TI)

static const PassInfo *	lookupPassInfo (StringRef Arg)

static Pass *	createPass (AnalysisID ID)

Protected Member Functions inherited from llvm::MachineFunctionPass
	MachineFunctionPass (char &ID)

Detailed Description

Definition at line 32 of file VirtRegMap.h.

Member Enumeration Documentation

anonymous enum

Enumerator
NO_PHYS_REG
NO_STACK_SLOT
MAX_STACK_SLOT

Definition at line 34 of file VirtRegMap.h.

Constructor & Destructor Documentation

llvm::VirtRegMap::VirtRegMap ( )

inline

Definition at line 71 of file VirtRegMap.h.

Member Function Documentation

void llvm::VirtRegMap::assignVirt2Phys	(	unsigned	virtReg,
		unsigned	physReg
	)

inline

creates a mapping for the specified virtual register to the specified physical register

Definition at line 105 of file VirtRegMap.h.

References llvm::TargetRegisterInfo::isPhysicalRegister(), llvm::TargetRegisterInfo::isVirtualRegister(), and NO_PHYS_REG.

Referenced by llvm::RegAllocBase::allocatePhysRegs().

int VirtRegMap::assignVirt2StackSlot ( unsigned virtReg )

create a mapping for the specifed virtual register to the next available stack slot

Definition at line 99 of file VirtRegMap.cpp.

References llvm::MachineRegisterInfo::getRegClass(), llvm::MachineFunction::getRegInfo(), llvm::TargetRegisterInfo::isVirtualRegister(), and NO_STACK_SLOT.

void VirtRegMap::assignVirt2StackSlot	(	unsigned	virtReg,
		int	frameIndex
	)

create a mapping for the specified virtual register to the specified stack slot

Definition at line 107 of file VirtRegMap.cpp.

References llvm::MachineFunction::getFrameInfo(), llvm::MachineFrameInfo::getObjectIndexBegin(), llvm::TargetRegisterInfo::isVirtualRegister(), and NO_STACK_SLOT.

void llvm::VirtRegMap::clearAllVirt ( )

inline

clears all virtual to physical register mappings

Definition at line 124 of file VirtRegMap.h.

References grow().

void llvm::VirtRegMap::clearVirt ( unsigned virtReg )

inline

clears the specified virtual register's, physical register mapping

Definition at line 116 of file VirtRegMap.h.

References llvm::TargetRegisterInfo::isVirtualRegister(), and NO_PHYS_REG.

void VirtRegMap::dump ( ) const

Definition at line 139 of file VirtRegMap.cpp.

References llvm::dbgs(), and print().

virtual void llvm::VirtRegMap::getAnalysisUsage ( AnalysisUsage & AU ) const

inlinevirtual

getAnalysisUsage - Subclasses that override getAnalysisUsage must call this.

For MachineFunctionPasses, calling AU.preservesCFG() indicates that the pass does not modify the MachineBasicBlock CFG.

Reimplemented from llvm::MachineFunctionPass.

Definition at line 75 of file VirtRegMap.h.

References llvm::MachineFunctionPass::getAnalysisUsage(), and llvm::AnalysisUsage::setPreservesAll().

MachineFunction& llvm::VirtRegMap::getMachineFunction ( ) const

inline

Definition at line 80 of file VirtRegMap.h.

Referenced by llvm::AllocationOrder::AllocationOrder(), llvm::SplitEditor::finish(), llvm::RegAllocBase::init(), llvm::SplitEditor::reset(), and llvm::SplitEditor::splitLiveThroughBlock().

unsigned llvm::VirtRegMap::getOriginal ( unsigned VirtReg ) const

inline

getOriginal - Return the original virtual register that VirtReg descends from through splitting. A register that was not created by splitting is its own original. This operation is idempotent.

Definition at line 151 of file VirtRegMap.h.

References getPreSplitReg().

Referenced by llvm::LiveRangeEdit::createEmptyIntervalFrom(), llvm::LiveRangeEdit::createFrom(), llvm::LiveRangeEdit::eliminateDeadDefs(), and llvm::SplitAnalysis::isOriginalEndpoint().

unsigned llvm::VirtRegMap::getPhys ( unsigned virtReg ) const

inline

returns the physical register mapped to the specified virtual register

Definition at line 98 of file VirtRegMap.h.

References llvm::TargetRegisterInfo::isVirtualRegister().

Referenced by llvm::LiveIntervals::addKillFlags(), llvm::ARMBaseRegisterInfo::getRegAllocationHints(), llvm::TargetRegisterInfo::getRegAllocationHints(), hasPhys(), and hasPreferredPhys().

unsigned llvm::VirtRegMap::getPreSplitReg ( unsigned virtReg ) const

inline

returns the live interval virtReg is split from.

Definition at line 143 of file VirtRegMap.h.

Referenced by getOriginal().

MachineRegisterInfo& llvm::VirtRegMap::getRegInfo ( ) const

inline

Definition at line 85 of file VirtRegMap.h.

Referenced by llvm::RegAllocBase::init().

int llvm::VirtRegMap::getStackSlot ( unsigned virtReg ) const

inline

returns the stack slot mapped to the specified virtual register

Definition at line 168 of file VirtRegMap.h.

References llvm::TargetRegisterInfo::isVirtualRegister().

Referenced by isAssignedReg().

const TargetRegisterInfo& llvm::VirtRegMap::getTargetRegInfo ( ) const

inline

Definition at line 86 of file VirtRegMap.h.

Referenced by llvm::AllocationOrder::AllocationOrder(), and llvm::RegAllocBase::init().

void VirtRegMap::grow ( )

Definition at line 67 of file VirtRegMap.cpp.

References llvm::MachineRegisterInfo::getNumVirtRegs(), and llvm::MachineFunction::getRegInfo().

Referenced by clearAllVirt().

bool VirtRegMap::hasKnownPreference ( unsigned VirtReg )

returns true if VirtReg has a known preferred register. This returns false if VirtReg has a preference that is a virtual register that hasn't been assigned yet.

Definition at line 90 of file VirtRegMap.cpp.

References hasPhys(), llvm::TargetRegisterInfo::isPhysicalRegister(), llvm::TargetRegisterInfo::isVirtualRegister(), and MRI.

bool llvm::VirtRegMap::hasPhys ( unsigned virtReg ) const

inline

returns true if the specified virtual register is mapped to a physical register

Definition at line 92 of file VirtRegMap.h.

References getPhys(), and NO_PHYS_REG.

Referenced by llvm::RegAllocBase::allocatePhysRegs(), llvm::ARMBaseRegisterInfo::getRegAllocationHints(), and hasKnownPreference().

bool VirtRegMap::hasPreferredPhys ( unsigned VirtReg )

returns true if VirtReg is assigned to its preferred physreg.

Definition at line 81 of file VirtRegMap.cpp.

References getPhys(), llvm::TargetRegisterInfo::isVirtualRegister(), and MRI.

bool llvm::VirtRegMap::isAssignedReg ( unsigned virtReg ) const

inline

returns true if the specified virtual register is not mapped to a stack slot or rematerialized.

Definition at line 158 of file VirtRegMap.h.

References getStackSlot(), NO_PHYS_REG, and NO_STACK_SLOT.

void VirtRegMap::print	(	raw_ostream &	O,
		const Module *	M = `0`
	)		const

virtual

print - Print out the internal state of the pass. This is called by Analyze to print out the contents of an analysis. Otherwise it is not necessary to implement this method. Beware that the module pointer MAY be null. This automatically forwards to a virtual function that does not provide the Module* in case the analysis doesn't need it it can just be ignored.

Reimplemented from llvm::Pass.

Definition at line 117 of file VirtRegMap.cpp.

References llvm::MCRegisterClass::getName(), llvm::MCRegisterInfo::getRegClass(), llvm::TargetRegisterInfo::index2VirtReg(), MRI, NO_PHYS_REG, and NO_STACK_SLOT.

Referenced by dump(), and llvm::operator<<().

bool VirtRegMap::runOnMachineFunction ( MachineFunction & MF )

virtual

runOnMachineFunction - This method must be overloaded to perform the desired machine code transformation or analysis.

Implements llvm::MachineFunctionPass.

Definition at line 53 of file VirtRegMap.cpp.

References llvm::HexagonInstrInfo::getRegisterInfo(), MRI, and TII.