com.oracle.graal.lir.amd64.phases

Class StackMoveOptimizationPhase

java.lang.Object

com.oracle.graal.lir.phases.LIRPhase<PostAllocationOptimizationPhase.PostAllocationOptimizationContext>

com.oracle.graal.lir.phases.PostAllocationOptimizationPhase

com.oracle.graal.lir.amd64.phases.StackMoveOptimizationPhase

public class StackMoveOptimizationPhase
extends PostAllocationOptimizationPhase

Replaces sequential AMD64Move.AMD64StackMoves of the same type with a single AMD64Move.AMD64MultiStackMove to avoid storing/restoring the scratch register multiple times. Note: this phase must be inserted after RedundantMoveElimination phase because AMD64Move.AMD64MultiStackMove are not probably detected.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	StackMoveOptimizationPhase.Closure
static class	StackMoveOptimizationPhase.Options

Nested classes/interfaces inherited from class com.oracle.graal.lir.phases.PostAllocationOptimizationPhase

PostAllocationOptimizationPhase.PostAllocationOptimizationContext

Field Summary

Fields

Modifier and Type	Field and Description
private static DebugMetric	eliminatedBackup

Constructor Summary

Constructors

Constructor and Description
StackMoveOptimizationPhase()

Method Summary

Modifier and Type	Method and Description
private static AMD64Move.AMD64StackMove	asStackMove(LIRInstruction inst)
private static boolean	isStackMove(LIRInstruction inst)
protected <B extends AbstractBlockBase<B>> void	run(TargetDescription target, LIRGenerationResult lirGenRes, List<B> codeEmittingOrder, List<B> linearScanOrder, BenchmarkCounterFactory counterFactory)

Methods inherited from class com.oracle.graal.lir.phases.PostAllocationOptimizationPhase

run

Methods inherited from class com.oracle.graal.lir.phases.LIRPhase

apply, apply, createName, getName

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

eliminatedBackup

private static final DebugMetric eliminatedBackup

Constructor Detail

StackMoveOptimizationPhase

public StackMoveOptimizationPhase()

Method Detail

run

protected <B extends AbstractBlockBase<B>> void run(TargetDescription target,
                                                    LIRGenerationResult lirGenRes,
                                                    List<B> codeEmittingOrder,
                                                    List<B> linearScanOrder,
                                                    BenchmarkCounterFactory counterFactory)

Specified by:

run in class PostAllocationOptimizationPhase

asStackMove

private static AMD64Move.AMD64StackMove asStackMove(LIRInstruction inst)

isStackMove

private static boolean isStackMove(LIRInstruction inst)