org.graalvm.compiler.truffle.compiler.phases

Class TruffleLoopSafepointEliminationPhase

java.lang.Object

org.graalvm.compiler.phases.BasePhase<MidTierContext>

org.graalvm.compiler.loop.phases.LoopSafepointEliminationPhase

org.graalvm.compiler.truffle.compiler.phases.TruffleLoopSafepointEliminationPhase

All Implemented Interfaces:

PhaseSizeContract

public final class TruffleLoopSafepointEliminationPhase
extends LoopSafepointEliminationPhase

Extends the default Graal loop safepoint elimination phase and adds logic to disable guest safepoints when the loop contains truffle calls or when there is a plain counted loop without allocations.

See Also:

LoopEndNode.canGuestSafepoint

Nested Class Summary

Nested classes/interfaces inherited from class org.graalvm.compiler.phases.BasePhase

BasePhase.ApplyScope, BasePhase.BasePhaseStatistics, BasePhase.PhaseOptions, BasePhase.SharedGlobalPhaseState

Constructor Summary

Constructors

Constructor and Description
TruffleLoopSafepointEliminationPhase(Providers providers)

Method Summary

Modifier and Type	Method and Description
protected boolean	allowGuestSafepoints() Determines whether guest safepoints should be allowed at all.
protected boolean	onCallInLoop(LoopEndNode loopEnd, FixedNode currentCallNode) To be implemented by subclasses to perform additional checks.
protected void	onSafepointDisabledLoopBegin(LoopEx loop) To be implemented by subclasses to compute additional fields.

Methods inherited from class org.graalvm.compiler.loop.phases.LoopSafepointEliminationPhase

canDisableSafepoint, loopIsIn32BitRange, run

Methods inherited from class org.graalvm.compiler.phases.BasePhase

apply, apply, applyScope, codeSizeIncrease, contractorName, equals, getName, hashCode, shouldDumpAfterAtBasicLevel, shouldDumpBeforeAtBasicLevel

Methods inherited from class java.lang.Object

clone, getClass, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.graalvm.compiler.phases.contract.PhaseSizeContract

checkContract

Constructor Detail

TruffleLoopSafepointEliminationPhase

public TruffleLoopSafepointEliminationPhase(Providers providers)

Method Detail

onSafepointDisabledLoopBegin

protected void onSafepointDisabledLoopBegin(LoopEx loop)

Description copied from class: LoopSafepointEliminationPhase

To be implemented by subclasses to compute additional fields.

Overrides:

onSafepointDisabledLoopBegin in class LoopSafepointEliminationPhase

onCallInLoop

protected boolean onCallInLoop(LoopEndNode loopEnd,
                               FixedNode currentCallNode)

Description copied from class: LoopSafepointEliminationPhase

To be implemented by subclasses to perform additional checks. Returns true if the safepoint was also disabled in subclasses and we therefore don't need to continue traversing.

Overrides:

onCallInLoop in class LoopSafepointEliminationPhase

allowGuestSafepoints

protected boolean allowGuestSafepoints()

Description copied from class: LoopSafepointEliminationPhase

Determines whether guest safepoints should be allowed at all. To be implemented by subclasses. The default implementation returns false, leading to guest safepoints being disabled for all loops in the graph.

Overrides:

allowGuestSafepoints in class LoopSafepointEliminationPhase