org.graalvm.compiler.phases.common

Class FrameStateAssignmentPhase

java.lang.Object

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

org.graalvm.compiler.phases.Phase

org.graalvm.compiler.phases.common.FrameStateAssignmentPhase

All Implemented Interfaces:

PhaseSizeContract

public class FrameStateAssignmentPhase
extends Phase

This phase transfers FrameState nodes from StateSplit nodes to DeoptimizingNodes. This allows the graph to enter the AFTER_FSA stage, where no new nodes that may cause deoptimizations can be introduced anymore.

This Phase processes the graph in post order, assigning the FrameState from the last StateSplit node to DeoptimizingNodes.

Nested Class Summary

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

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

Field Summary

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

ALWAYS_APPLICABLE

Constructor Summary

Constructors

Constructor and Description
FrameStateAssignmentPhase()

Method Summary

Modifier and Type	Method and Description
Optional<BasePhase.NotApplicable>	canApply(GraphState graphState) Checks if all the preconditions to BasePhase.apply(StructuredGraph, Object, boolean) the phase are met.
boolean	checkContract()
protected void	run(StructuredGraph graph)
void	updateGraphState(GraphState graphState) Applies all the changes on the GraphState caused by BasePhase.apply(StructuredGraph, Object, boolean).

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

apply, apply, run

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

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

Methods inherited from class java.lang.Object

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

Constructor Detail

FrameStateAssignmentPhase

public FrameStateAssignmentPhase()

Method Detail

canApply

public Optional<BasePhase.NotApplicable> canApply(GraphState graphState)

Description copied from class: BasePhase

Checks if all the preconditions to BasePhase.apply(StructuredGraph, Object, boolean) the phase are met.

Overrides:

canApply in class BasePhase<Object>

Parameters:

graphState - represents the state of the StructuredGraph used for compilation and contains the required information to determine if a phase can be applied.

Returns:

Optional.empty() if all the checks pass, Optional#of(NotApplicable) containing why this phase is not applicable on this graphState otherwise.

run

protected void run(StructuredGraph graph)

Specified by:

run in class Phase

updateGraphState

public void updateGraphState(GraphState graphState)

Description copied from class: BasePhase

Applies all the changes on the GraphState caused by BasePhase.apply(StructuredGraph, Object, boolean).

Overrides:

updateGraphState in class BasePhase<Object>

Parameters:

graphState - represents the state of the StructuredGraph used for compilation.

checkContract

public boolean checkContract()