#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 ()
bool	runOnMachineFunction (MachineFunction &MF) override
void	getAnalysisUsage (AnalysisUsage &AU) const override
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
unsigned	getPhys (unsigned virtReg) const
	returns the physical register mapped to the specified virtual register
void	assignVirt2Phys (unsigned virtReg, unsigned physReg)
	creates a mapping for the specified virtual register to the specified physical register
void	clearVirt (unsigned virtReg)
	clears the specified virtual register's, physical register mapping
void	clearAllVirt ()
	clears all virtual to physical register mappings
bool	hasPreferredPhys (unsigned VirtReg)
	returns true if VirtReg is assigned to its preferred physreg.
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.
void	setIsSplitFromReg (unsigned virtReg, unsigned SReg)
	records virtReg is a split live interval from SReg.
unsigned	getPreSplitReg (unsigned virtReg) const
	returns the live interval virtReg is split from.
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.
int	getStackSlot (unsigned virtReg) const
	returns the stack slot mapped to the specified virtual register
int	assignVirt2StackSlot (unsigned virtReg)
	create a mapping for the specifed virtual register to the next available stack slot
void	assignVirt2StackSlot (unsigned virtReg, int frameIndex)
	create a mapping for the specified virtual register to the specified stack slot
void	print (raw_ostream &OS, const Module *M=nullptr) const override
void	dump () const
Static Public Attributes
static char	ID = 0

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 102 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 110 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 llvm::IndexedMap< T, ToIndexT >::clear(), and 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

Reimplemented from llvm::Pass.

Definition at line 142 of file VirtRegMap.cpp.

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

void llvm::VirtRegMap::getAnalysisUsage ( AnalysisUsage & AU ) const [inline, override, virtual]

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::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(), and runOnMachineFunction().

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 70 of file VirtRegMap.cpp.

References llvm::MachineRegisterInfo::getNumVirtRegs(), llvm::MachineFunction::getRegInfo(), and llvm::IndexedMap< T, ToIndexT >::resize().

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 93 of file VirtRegMap.cpp.

References llvm::MachineRegisterInfo::getRegAllocationHint(), hasPhys(), Hint(), llvm::TargetRegisterInfo::isPhysicalRegister(), and llvm::TargetRegisterInfo::isVirtualRegister().

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 84 of file VirtRegMap.cpp.

References getPhys(), llvm::MachineRegisterInfo::getSimpleHint(), Hint(), and llvm::TargetRegisterInfo::isVirtualRegister().

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 = `nullptr`
	)		const `[override, 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 120 of file VirtRegMap.cpp.

References llvm::TargetRegisterClass::getName(), llvm::MachineRegisterInfo::getNumVirtRegs(), llvm::MachineRegisterInfo::getRegClass(), llvm::TargetRegisterInfo::index2VirtReg(), NO_PHYS_REG, and NO_STACK_SLOT.

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

bool VirtRegMap::runOnMachineFunction ( MachineFunction & MF ) [override, virtual]