org.jikesrvm.compilers.opt

Class LocalConstantProp

java.lang.Object

org.jikesrvm.compilers.opt.driver.CompilerPhase

org.jikesrvm.compilers.opt.LocalConstantProp

public class LocalConstantProp
extends CompilerPhase

Perform local constant propagation for a factored basic block. Orthogonal to the constant propagation performed in Simple since here we use flow-sensitive analysis within a basic block.

Field Summary

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

container

Constructor Summary

Constructors

Constructor and Description
LocalConstantProp()

Method Summary

Modifier and Type	Method and Description
String	getName()
CompilerPhase	newExecution(IR ir) Return this instance of this phase.
void	perform(IR ir) Perform Local Constant propagation for a method.
void	reportAdditionalStats() Called when printing a measure compilation report to enable a phase to report additional phase-specific statistics.
boolean	shouldPerform(OptOptions options) This method determines if the phase should be run, based on the Options object it is passed.

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

dumpIR, dumpIR, getClassConstructor, getCompilerPhaseConstructor, getCompilerPhaseConstructor, performPhase, printingEnabled, setContainer, verify

Methods inherited from class java.lang.Object

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

Constructor Detail

LocalConstantProp

public LocalConstantProp()

Method Detail

shouldPerform

public final boolean shouldPerform(OptOptions options)

Description copied from class: CompilerPhase

This method determines if the phase should be run, based on the Options object it is passed. By default, phases are always performed. Subclasses should override this method if they only want to be performed conditionally.

Overrides:

shouldPerform in class CompilerPhase

Parameters:

options - the compiler options for the compilation

Returns:

true if the phase should be performed

getName

public final String getName()

Specified by:

getName in class CompilerPhase

Returns:

a String which is the name of the phase.

reportAdditionalStats

public void reportAdditionalStats()

Description copied from class: CompilerPhase

Called when printing a measure compilation report to enable a phase to report additional phase-specific statistics.

Overrides:

reportAdditionalStats in class CompilerPhase

newExecution

public CompilerPhase newExecution(IR ir)

Return this instance of this phase. This phase contains no per-compilation instance fields.

Overrides:

newExecution in class CompilerPhase

Parameters:

ir - not used

Returns:

this

perform

public void perform(IR ir)

Perform Local Constant propagation for a method.

Specified by:

perform in class CompilerPhase

Parameters:

ir - the IR to optimize