llvm::LiveQueryResult Class Reference

Result of a LiveRange query. More...

#include "llvm/CodeGen/LiveInterval.h"

Public Member Functions
	LiveQueryResult (VNInfo *EarlyVal, VNInfo *LateVal, SlotIndex EndPoint, bool Kill)
VNInfo *	valueIn () const
	Return the value that is live-in to the instruction.
bool	isKill () const
	Return true if the live-in value is killed by this instruction.
bool	isDeadDef () const
	Return true if this instruction has a dead def.
VNInfo *	valueOut () const
	Return the value leaving the instruction, if any.
VNInfo *	valueOutOrDead () const
	Returns the value alive at the end of the instruction, if any.
VNInfo *	valueDefined () const
	Return the value defined by this instruction, if any.
SlotIndex	endPoint () const
	Return the end point of the last live range segment to interact with the instruction, if any.

Detailed Description

Result of a LiveRange query.

This class hides the implementation details of live ranges, and it should be used as the primary interface for examining live ranges around instructions.

Definition at line 91 of file LiveInterval.h.

Constructor & Destructor Documentation

LiveQueryResult()

llvm::LiveQueryResult::LiveQueryResult ( VNInfo *  EarlyVal, VNInfo *  LateVal, SlotIndex  EndPoint, bool  Kill  )

inline

Definition at line 98 of file LiveInterval.h.

Member Function Documentation

endPoint()

SlotIndex llvm::LiveQueryResult::endPoint ( ) const

inline

Return the end point of the last live range segment to interact with the instruction, if any.

The end point is an invalid SlotIndex only if the live range doesn't intersect the instruction at all.

The end point may be at or past the end of the instruction's basic block. That means the value was live out of the block.

Definition at line 148 of file LiveInterval.h.

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

isDeadDef()

bool llvm::LiveQueryResult::isDeadDef ( ) const

inline

Return true if this instruction has a dead def.

Definition at line 118 of file LiveInterval.h.

References llvm::SlotIndex::isDead().

Referenced by llvm::RegisterOperands::detectDeadDefs(), llvm::LiveIntervals::handleMoveIntoNewBundle(), and valueOut().

isKill()

bool llvm::LiveQueryResult::isKill ( ) const

inline

Return true if the live-in value is killed by this instruction.

This means that either the live range ends at the instruction, or it changes value.

Definition at line 113 of file LiveInterval.h.

Referenced by isDefBetween().

valueDefined()

VNInfo * llvm::LiveQueryResult::valueDefined ( ) const

inline

Return the value defined by this instruction, if any.

This includes dead defs, it is the value created by the instruction's def operands.

Definition at line 136 of file LiveInterval.h.

Referenced by llvm::ConnectedVNInfoEqClasses::Distribute(), and llvm::LiveIntervals::shrinkToUses().

valueIn()

VNInfo * llvm::LiveQueryResult::valueIn ( ) const

inline

Return the value that is live-in to the instruction.

This is the value that will be read by the instruction's use operands. Return NULL if no value is live-in.

Definition at line 106 of file LiveInterval.h.

Referenced by llvm::ScheduleDAGMILive::computeCyclicCriticalPath(), llvm::ConnectedVNInfoEqClasses::Distribute(), isDefBetween(), isLiveThrough(), llvm::VirtRegAuxInfo::isRematerializable(), llvm::LiveIntervals::pruneValue(), llvm::LiveIntervals::shrinkToUses(), and llvm::ScheduleDAGMILive::updatePressureDiffs().

valueOut()

VNInfo * llvm::LiveQueryResult::valueOut ( ) const

inline

Return the value leaving the instruction, if any.

This can be a live-through value, or a live def. A dead def returns NULL.

Definition at line 124 of file LiveInterval.h.

References isDeadDef().

Referenced by llvm::ConnectedVNInfoEqClasses::Distribute(), isDefBetween(), and isLiveThrough().

valueOutOrDead()

VNInfo * llvm::LiveQueryResult::valueOutOrDead ( ) const

inline

Returns the value alive at the end of the instruction, if any.

This can be a live-through value, a live def or a dead def.

Definition at line 130 of file LiveInterval.h.

Referenced by isDefInSubRange(), and llvm::LiveIntervals::pruneValue().

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

• include/llvm/CodeGen/LiveInterval.h