org.jikesrvm.compilers.opt.regalloc

Class LinearScan

java.lang.Object

org.jikesrvm.compilers.opt.driver.OptimizationPlanElement

org.jikesrvm.compilers.opt.driver.OptimizationPlanCompositeElement

org.jikesrvm.compilers.opt.regalloc.LinearScan

public final class LinearScan
extends OptimizationPlanCompositeElement

Main driver for linear scan register allocation.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) static boolean	DEBUG
(package private) static boolean	DEBUG_COALESCE
(package private) static boolean	GC_DEBUG
(package private) static boolean	VERBOSE_DEBUG

Constructor Summary

Constructors

Constructor and Description
LinearScan() Build this phase as a composite of others.

Method Summary

Modifier and Type	Method and Description
String	getName()
boolean	printingEnabled(OptOptions options, boolean before) Returns true if the phase wants the IR dumped before and/or after it runs.
boolean	shouldPerform(OptOptions options) Register allocation is required

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

compose, elapsedTime, initializeForMeasureCompilation, perform, reportStats

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

prettyPrintTime

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

See Also:

Constant Field Values

VERBOSE_DEBUG

static final boolean VERBOSE_DEBUG

See Also:

Constant Field Values

GC_DEBUG

static final boolean GC_DEBUG

See Also:

Constant Field Values

DEBUG_COALESCE

static final boolean DEBUG_COALESCE

See Also:

Constant Field Values

Constructor Detail

LinearScan

LinearScan()

Build this phase as a composite of others.

Method Detail

shouldPerform

public boolean shouldPerform(OptOptions options)

Register allocation is required

Overrides:

shouldPerform in class OptimizationPlanCompositeElement

Parameters:

options - The Options object for the current compilation.

Returns:

true if the plan element should be performed.

getName

public String getName()

Overrides:

getName in class OptimizationPlanCompositeElement

Returns:

a String which is the name of the phase.

printingEnabled

public boolean printingEnabled(OptOptions options,
                               boolean before)

Description copied from class: OptimizationPlanCompositeElement

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

Overrides:

printingEnabled in class OptimizationPlanCompositeElement

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.