llvm::VNInfo Class Reference

VNInfo - Value Number Information. More...

#include "llvm/CodeGen/LiveInterval.h"

Public Types
using	Allocator = BumpPtrAllocator

Public Member Functions
	VNInfo (unsigned i, SlotIndex d)
	VNInfo constructor.
	VNInfo (unsigned i, const VNInfo &orig)
	VNInfo constructor, copies values from orig, except for the value number.
void	copyFrom (VNInfo &src)
	Copy from the parameter into this VNInfo.
bool	isPHIDef () const
	Returns true if this value is defined by a PHI instruction (or was, PHI instructions may have been eliminated).
bool	isUnused () const
	Returns true if this value is unused.
void	markUnused ()
	Mark this value as unused.
LLVM_ABI void	print (raw_ostream &OS) const
LLVM_ABI void	dump () const

Public Attributes
unsigned	id
	The ID number of this value.
SlotIndex	def
	The index of the defining instruction.

Detailed Description

VNInfo - Value Number Information.

This class holds information about a machine level values, including definition and use points.

Definition at line 54 of file LiveInterval.h.

Member Typedef Documentation

Allocator

using llvm::VNInfo::Allocator = BumpPtrAllocator

Definition at line 56 of file LiveInterval.h.

Constructor & Destructor Documentation

VNInfo() [1/2]

llvm::VNInfo::VNInfo ( unsigned i, SlotIndex d )

inline

VNInfo constructor.

Definition at line 65 of file LiveInterval.h.

References def, and id.

Referenced by copyFrom(), and VNInfo().

VNInfo() [2/2]

llvm::VNInfo::VNInfo ( unsigned i, const VNInfo & orig )

inline

VNInfo constructor, copies values from orig, except for the value number.

Definition at line 68 of file LiveInterval.h.

References def, id, and VNInfo().

Member Function Documentation

copyFrom()

void llvm::VNInfo::copyFrom ( VNInfo & src )

inline

Copy from the parameter into this VNInfo.

Definition at line 71 of file LiveInterval.h.

References def, and VNInfo().

Referenced by llvm::LiveRange::MergeValueNumberInto().

dump()

LLVM_DUMP_METHOD void VNInfo::dump

(

)

const

Definition at line 1050 of file LiveInterval.cpp.

References llvm::dbgs(), and LLVM_DUMP_METHOD.

isPHIDef()

bool llvm::VNInfo::isPHIDef ( ) const

inline

Returns true if this value is defined by a PHI instruction (or was, PHI instructions may have been eliminated).

PHI-defs begin at a block boundary, all other defs begin at register or EC slots.

Definition at line 79 of file LiveInterval.h.

References def.

Referenced by llvm::ConnectedVNInfoEqClasses::Classify(), llvm::ScheduleDAGMILive::computeCyclicCriticalPath(), llvm::LiveIntervalCalc::constructMainRangeFromSubranges(), isLiveThrough(), llvm::VirtRegAuxInfo::isRematerializable(), print(), llvm::LiveIntervals::shrinkToUses(), and stripValuesNotDefiningMask().

isUnused()

bool llvm::VNInfo::isUnused ( ) const

inline

Returns true if this value is unused.

Definition at line 82 of file LiveInterval.h.

References def.

Referenced by llvm::ConnectedVNInfoEqClasses::Classify(), llvm::LiveIntervalCalc::constructMainRangeFromSubranges(), createSegmentsForValues(), llvm::ConnectedVNInfoEqClasses::Distribute(), llvm::SplitEditor::finish(), llvm::VirtRegAuxInfo::isRematerializable(), print(), llvm::LiveRange::RenumberValues(), llvm::LiveIntervals::shrinkToUses(), and stripValuesNotDefiningMask().

markUnused()

void llvm::VNInfo::markUnused ( )

inline

Mark this value as unused.

Definition at line 85 of file LiveInterval.h.

References def.

Referenced by llvm::LiveIntervals::shrinkToUses().

print()

void VNInfo::print

(

raw_ostream &

OS

)

const

Definition at line 999 of file LiveInterval.cpp.

References def, isPHIDef(), and isUnused().

Referenced by llvm::operator<<().

Member Data Documentation

def

SlotIndex llvm::VNInfo::def

The index of the defining instruction.

Definition at line 62 of file LiveInterval.h.

Referenced by llvm::ConnectedVNInfoEqClasses::Classify(), llvm::ScheduleDAGMILive::computeCyclicCriticalPath(), llvm::LiveIntervalCalc::constructMainRangeFromSubranges(), copyFrom(), llvm::LiveRange::createDeadDef(), createSegmentsForValues(), llvm::ConnectedVNInfoEqClasses::Distribute(), llvm::SplitEditor::enterIntvAfter(), llvm::SplitEditor::enterIntvAtEnd(), llvm::SplitEditor::enterIntvBefore(), llvm::SplitEditor::finish(), isDefInSubRange(), isPHIDef(), llvm::VirtRegAuxInfo::isRematerializable(), isUnused(), llvm::SplitEditor::leaveIntvAfter(), llvm::SplitEditor::leaveIntvAtTop(), llvm::SplitEditor::leaveIntvBefore(), markUnused(), moveAndTeeForMultiUse(), print(), llvm::LiveRange::Query(), llvm::LiveIntervals::removeVRegDefAt(), llvm::LiveIntervals::shrinkToUses(), stripValuesNotDefiningMask(), VNInfo(), and VNInfo().

id

unsigned llvm::VNInfo::id

The ID number of this value.

Definition at line 59 of file LiveInterval.h.

Referenced by llvm::LiveRange::assign(), llvm::ConnectedVNInfoEqClasses::Classify(), llvm::LiveRange::containsValue(), llvm::DistributeRange(), llvm::SplitEditor::enterIntvAfter(), llvm::SplitEditor::enterIntvAtEnd(), llvm::SplitEditor::enterIntvBefore(), llvm::ConnectedVNInfoEqClasses::getEqClass(), llvm::VirtRegAuxInfo::isRematerializable(), llvm::LiveRange::join(), llvm::SplitEditor::leaveIntvAfter(), llvm::SplitEditor::leaveIntvBefore(), llvm::LiveRange::MergeValueNumberInto(), llvm::operator<<(), llvm::LiveRange::print(), llvm::LiveRange::RenumberValues(), VNInfo(), and VNInfo().

---

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

• include/llvm/CodeGen/LiveInterval.h
• lib/CodeGen/LiveInterval.cpp