llvm::VNInfo Class Reference

VNInfo - Value Number Information. More...

#include "llvm/CodeGen/LiveInterval.h"

Collaboration diagram for llvm::VNInfo:

Public Types
using	Allocator = BumpPtrAllocator

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

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

Detailed Description

VNInfo - Value Number Information.

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

Definition at line 53 of file LiveInterval.h.

Member Typedef Documentation

Allocator

using llvm::VNInfo::Allocator = BumpPtrAllocator

Definition at line 55 of file LiveInterval.h.

Constructor & Destructor Documentation

VNInfo() [1/2]

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

inline

VNInfo constructor.

Definition at line 64 of file LiveInterval.h.

Referenced by llvm::LiveRange::createValueCopy(), and llvm::LiveRange::getNextValue().

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 67 of file LiveInterval.h.

Member Function Documentation

copyFrom()

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

inline

Copy from the parameter into this VNInfo.

Definition at line 70 of file LiveInterval.h.

References def.

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

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 78 of file LiveInterval.h.

References llvm::SlotIndex::isBlock().

Referenced by addSegmentsWithValNo(), llvm::ConnectedVNInfoEqClasses::Classify(), llvm::SplitAnalysis::clear(), llvm::ScheduleDAGMILive::computeCyclicCriticalPath(), llvm::LiveRangeCalc::constructMainRangeFromSubranges(), createSegmentsForValues(), llvm::createSIWholeQuadModePass(), definesFullReg(), llvm::LiveIntervals::hasPHIKill(), isDefInSubRange(), isFullCopyOf(), isRematerializable(), matchPair(), llvm::LiveRange::print(), llvm::LiveIntervals::shrinkToUses(), and subRangeLiveAt().

isUnused()

bool llvm::VNInfo::isUnused ( ) const

inline

Returns true if this value is unused.

Definition at line 81 of file LiveInterval.h.

References llvm::SlotIndex::isValid().

Referenced by addSegmentsWithValNo(), llvm::ConnectedVNInfoEqClasses::Classify(), llvm::SplitAnalysis::clear(), llvm::LiveRangeCalc::constructMainRangeFromSubranges(), definesFullReg(), llvm::ConnectedVNInfoEqClasses::Distribute(), llvm::SplitEditor::finish(), llvm::LiveIntervals::hasPHIKill(), isDefInSubRange(), isFullCopyOf(), isRematerializable(), matchPair(), llvm::LiveRange::print(), llvm::LiveRange::RenumberValues(), llvm::LiveIntervals::shrinkToUses(), and subRangeLiveAt().

markUnused()

void llvm::VNInfo::markUnused ( )

inline

Mark this value as unused.

Definition at line 84 of file LiveInterval.h.

Referenced by addSegmentsWithValNo(), llvm::LiveRange::covers(), isDefInSubRange(), and llvm::LiveIntervals::shrinkToUses().

Member Data Documentation

def

SlotIndex llvm::VNInfo::def

The index of the defining instruction.

Definition at line 61 of file LiveInterval.h.

Referenced by addSegmentsWithValNo(), allPhiOperandsUndefined(), llvm::LiveRangeEdit::checkRematerializable(), llvm::ConnectedVNInfoEqClasses::Classify(), llvm::SplitAnalysis::clear(), llvm::ScheduleDAGMILive::computeCyclicCriticalPath(), llvm::LiveRangeCalc::constructMainRangeFromSubranges(), copyFrom(), llvm::createCopyConstrainDAGMutation(), llvm::LiveRange::createDeadDef(), createSegmentsForValues(), llvm::createSIWholeQuadModePass(), definesFullReg(), llvm::ConnectedVNInfoEqClasses::Distribute(), llvm::SplitEditor::dump(), llvm::SplitEditor::enterIntvAfter(), llvm::SplitEditor::enterIntvBefore(), llvm::LiveRangeEdit::eraseVirtReg(), llvm::SIRegisterInfo::findReachingDef(), llvm::SplitEditor::finish(), llvm::LiveRange::getNextValue(), llvm::LiveIntervals::hasPHIKill(), llvm::InsertPointAnalysis::InsertPointAnalysis(), llvm::CoalescerPair::isCoalescable(), isDefInSubRange(), isFullCopyOf(), isFullUndefDef(), isRematerializable(), llvm::SplitEditor::leaveIntvAfter(), llvm::SplitEditor::leaveIntvBefore(), matchPair(), MoveAndTeeForMultiUse(), llvm::LiveRange::print(), llvm::LiveRange::Query(), llvm::LiveIntervals::removeVRegDefAt(), llvm::LiveIntervals::shrinkToUses(), subRangeLiveAt(), llvm::LiveIntervals::HMEditor::updateAllRanges(), and llvm::MachineFunction::verify().

id

unsigned llvm::VNInfo::id

The ID number of this value.

Definition at line 58 of file LiveInterval.h.

Referenced by llvm::LiveRange::assign(), llvm::ConnectedVNInfoEqClasses::Classify(), llvm::LiveRange::containsValue(), llvm::LiveRange::covers(), llvm::DistributeRange(), llvm::SplitEditor::dump(), llvm::SplitEditor::enterIntvAfter(), llvm::SplitEditor::enterIntvBefore(), llvm::ConnectedVNInfoEqClasses::getEqClass(), isFullCopyOf(), llvm::LiveRange::join(), llvm::SplitEditor::leaveIntvAfter(), llvm::SplitEditor::leaveIntvBefore(), matchPair(), llvm::LiveRange::MergeValueNumberInto(), llvm::operator<<(), llvm::LiveIntervals::print(), llvm::LiveRange::RenumberValues(), and llvm::MachineFunction::verify().

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

• include/llvm/CodeGen/LiveInterval.h