PostDominatorsPhase (Jikes RVM API)

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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
extends CompilerPhase

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

Field Summary
`private boolean`	`unfactor` Should we unfactor the CFG?

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

Constructor Summary
`PostDominatorsPhase(boolean unfactor)`

Method Summary
`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