org.jikesrvm.compilers.opt.controlflow

Class PostDominatorsPhase

java.lang.Object

org.jikesrvm.compilers.opt.driver.CompilerPhase

org.jikesrvm.compilers.opt.controlflow.PostDominatorsPhase

public final class PostDominatorsPhase
extends CompilerPhase

Driver routine for post-dominator computation. This phase invokes the Lengauer-Tarjan dominator calculation.

Field Summary

Fields

Modifier and Type	Field and Description
private boolean	unfactor Should we unfactor the CFG?

Fields inherited from class org.jikesrvm.compilers.opt.driver.CompilerPhase

container

Constructor Summary

Constructors

Constructor and Description
PostDominatorsPhase(boolean unfactor)

Method Summary

Modifier and Type	Method and Description
String	getName() Return a string representation of this phase
void	perform(IR ir) Main driver for the post-dominator calculation.
boolean	printingEnabled(OptOptions options, boolean before) Should the IR be printed before and/or after this phase?
boolean	shouldPerform(OptOptions options) Should this phase be performed?

Methods inherited from class org.jikesrvm.compilers.opt.driver.CompilerPhase

dumpIR, dumpIR, getClassConstructor, getCompilerPhaseConstructor, getCompilerPhaseConstructor, newExecution, performPhase, reportAdditionalStats, setContainer, verify

Methods inherited from class java.lang.Object

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

Field Detail

unfactor

private final boolean unfactor

Should we unfactor the CFG?

Constructor Detail

PostDominatorsPhase

public PostDominatorsPhase(boolean unfactor)

Parameters:

unfactor - Should we unfactor the CFG before computing dominators?

Method Detail

shouldPerform

public boolean shouldPerform(OptOptions options)

Should this phase be performed? This is a member of a composite phase, so always return true. The parent composite phase will dictate.

Overrides:

shouldPerform in class CompilerPhase

Parameters:

options - controlling compiler options

Returns:

true if the phase should be performed

getName

public String getName()

Return a string representation of this phase

Specified by:

getName in class CompilerPhase

Returns:

"Post-Dominators"

printingEnabled

public boolean printingEnabled(OptOptions options,
                               boolean before)

Should the IR be printed before and/or after this phase?

Overrides:

printingEnabled in class CompilerPhase

Parameters:

options - controlling compiler options

before - query control

Returns:

false

perform

public void perform(IR ir)

Main driver for the post-dominator calculation.

Specified by:

perform in class CompilerPhase

Parameters:

ir - the IR on which to apply the phase