com.oracle.graal.lir

Class SwitchStrategy.EffortClosure

java.lang.Object

com.oracle.graal.lir.SwitchStrategy.EffortClosure

All Implemented Interfaces:

SwitchStrategy.SwitchClosure

Enclosing class:

SwitchStrategy

private class SwitchStrategy.EffortClosure
extends Object
implements SwitchStrategy.SwitchClosure

This closure is used internally to determine the average effort for a certain strategy on a given switch instruction.

Field Summary

Fields

Modifier and Type	Field and Description
private int	defaultCount
private int	defaultEffort
private int[]	keyCounts
private int[]	keyEfforts
private LabelRef[]	keyTargets

Constructor Summary

Constructors

Constructor and Description
EffortClosure(LabelRef[] keyTargets)

Method Summary

Modifier and Type	Method and Description
void	bind(Label label) Binds a label returned by SwitchStrategy.SwitchClosure.conditionalJump(int, Condition).
Label	conditionalJump(int index, Condition condition) Create a new label and generate a conditional jump to it.
void	conditionalJump(int index, Condition condition, boolean defaultTarget) Generates a conditional or unconditional jump.
void	conditionalJumpOrDefault(int index, Condition condition, boolean canFallThrough) Generates a conditional jump to the target with the specified index.
double	getAverageEffort()
boolean	isSameTarget(int index1, int index2) Return true iff the target of both indexes is the same.

Methods inherited from class java.lang.Object

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

Field Detail

defaultEffort

private int defaultEffort

defaultCount

private int defaultCount

keyEfforts

private final int[] keyEfforts

keyCounts

private final int[] keyCounts

keyTargets

private final LabelRef[] keyTargets

Constructor Detail

EffortClosure

public EffortClosure(LabelRef[] keyTargets)

Method Detail

conditionalJump

public void conditionalJump(int index,
                            Condition condition,
                            boolean defaultTarget)

Description copied from interface: SwitchStrategy.SwitchClosure

Generates a conditional or unconditional jump. The jump will be unconditional if condition is null. If defaultTarget is true, then the jump will go the the default.

Specified by:

conditionalJump in interface SwitchStrategy.SwitchClosure

Parameters:

index - Index of the value and the jump target (only used if defaultTarget == false)

condition - The condition on which to jump (can be null)

defaultTarget - true if the jump should go to the default target, false if index should be used.

conditionalJumpOrDefault

public void conditionalJumpOrDefault(int index,
                                     Condition condition,
                                     boolean canFallThrough)

Description copied from interface: SwitchStrategy.SwitchClosure

Generates a conditional jump to the target with the specified index. The fall through should go to the default target.

Specified by:

conditionalJumpOrDefault in interface SwitchStrategy.SwitchClosure

Parameters:

index - Index of the value and the jump target

condition - The condition on which to jump

canFallThrough - true if this is the last instruction in the switch statement, to allow for fall-through optimizations.

conditionalJump

public Label conditionalJump(int index,
                             Condition condition)

Description copied from interface: SwitchStrategy.SwitchClosure

Create a new label and generate a conditional jump to it.

Specified by:

conditionalJump in interface SwitchStrategy.SwitchClosure

Parameters:

index - Index of the value and the jump target

condition - The condition on which to jump

Returns:

a new Label

bind

public void bind(Label label)

Description copied from interface: SwitchStrategy.SwitchClosure

Binds a label returned by SwitchStrategy.SwitchClosure.conditionalJump(int, Condition).

Specified by:

bind in interface SwitchStrategy.SwitchClosure

isSameTarget

public boolean isSameTarget(int index1,
                            int index2)

Description copied from interface: SwitchStrategy.SwitchClosure

Return true iff the target of both indexes is the same.

Specified by:

isSameTarget in interface SwitchStrategy.SwitchClosure

getAverageEffort

public double getAverageEffort()