org.jikesrvm.compilers.opt.regalloc

Class SpillCode

java.lang.Object

org.jikesrvm.compilers.opt.driver.CompilerPhase

org.jikesrvm.compilers.opt.regalloc.SpillCode

final class SpillCode
extends CompilerPhase

Insert Spill Code after register assignment.

Field Summary

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

container

Constructor Summary

Constructors

Constructor and Description
SpillCode()

Method Summary

Modifier and Type	Method and Description
String	getName()
CompilerPhase	newExecution(IR ir) Return this instance of this phase.
void	perform(IR ir) This is the method that actually does the work of the phase.
boolean	printingEnabled(OptOptions options, boolean before) Returns true if the phase wants the IR dumped before and/or after it runs.
private static void	replaceSymbolicRegisters(IR ir) Iterates over the IR and replace each symbolic register with its allocated physical register.
private void	rewriteFPStack(IR ir) Rewrites floating point registers to reflect changes in stack height induced by BURS.
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, reportAdditionalStats, setContainer, verify

Methods inherited from class java.lang.Object

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

Constructor Detail

SpillCode

SpillCode()

Method Detail

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

shouldPerform

public 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 String getName()

Specified by:

getName in class CompilerPhase

Returns:

a String which is the name of the phase.

printingEnabled

public boolean printingEnabled(OptOptions options,
                               boolean before)

Description copied from class: CompilerPhase

Returns true if the phase wants the IR dumped before and/or after it runs. By default, printing is not enabled. Subclasses should override this method if they want to provide IR dumping.

Overrides:

printingEnabled in class CompilerPhase

Parameters:

options - the compiler options for the compilation

before - true when invoked before perform, false otherwise.

Returns:

true if the IR should be printed, false otherwise.

rewriteFPStack

private void rewriteFPStack(IR ir)

Rewrites floating point registers to reflect changes in stack height induced by BURS.

Side effect: update the fpStackHeight in MIRInfo.

Parameters:

ir - the IR to process

perform

public void perform(IR ir)

Description copied from class: CompilerPhase

This is the method that actually does the work of the phase.

Specified by:

perform in class CompilerPhase

Parameters:

ir - the IR

replaceSymbolicRegisters

private static void replaceSymbolicRegisters(IR ir)

Iterates over the IR and replace each symbolic register with its allocated physical register.

Parameters:

ir - the IR to process