org.graalvm.compiler.phases.common

Class GuardLoweringPhase

java.lang.Object

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

org.graalvm.compiler.phases.common.GuardLoweringPhase

All Implemented Interfaces:

PhaseSizeContract

public class GuardLoweringPhase
extends BasePhase<CoreProviders>

This phase lowers GuardNodes into corresponding control-flow structure and DeoptimizeNodes. This allow to enter the FIXED_DEOPTS stage of the graph where all node that may cause deoptimization are fixed.

It first makes a schedule in order to know where the control flow should be placed. Then, for each block, it applies two passes. The first one tries to replace null-check guards with implicit null checks performed by access to the objects that need to be null checked. The second phase does the actual control-flow expansion of the remaining GuardNodes.

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
GuardLoweringPhase()

Method Summary

Modifier and Type	Method and Description
protected void	run(StructuredGraph graph, CoreProviders context)

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

GuardLoweringPhase

public GuardLoweringPhase()

Method Detail

run

protected void run(StructuredGraph graph,
                   CoreProviders context)

Specified by:

run in class BasePhase<CoreProviders>