org.jikesrvm.compilers.opt.regalloc

Class CoalesceMoves

java.lang.Object

org.jikesrvm.compilers.opt.driver.CompilerPhase

org.jikesrvm.compilers.opt.regalloc.CoalesceMoves

public class CoalesceMoves
extends CompilerPhase

Coalesce registers in move instructions where possible.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) static boolean	DEBUG verbose debugging flag

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

container

Constructor Summary

Constructors

Constructor and Description
CoalesceMoves()

Method Summary

Modifier and Type	Method and Description
String	getName() Return a string name for this phase.
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	shouldPerform(OptOptions options) Should we perform this phase?

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

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

Methods inherited from class java.lang.Object

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

Field Detail

DEBUG

static final boolean DEBUG

verbose debugging flag

See Also:

Constant Field Values

Constructor Detail

CoalesceMoves

public CoalesceMoves()

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 final boolean shouldPerform(OptOptions options)

Should we perform this phase?

Overrides:

shouldPerform in class CompilerPhase

Parameters:

options - the compiler options for the compilation

Returns:

true iff move instructions should be coalesced after leaving SSA

getName

public final String getName()

Return a string name for this phase.

Specified by:

getName in class CompilerPhase

Returns:

"Coalesce Moves"

perform

public final 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 on which to apply the phase