OptimizationPlanElement (Jikes RVM API)

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org.jikesrvm.compilers.opt.driver
Class OptimizationPlanElement

java.lang.Object
  org.jikesrvm.compilers.opt.driver.OptimizationPlanElement

Direct Known Subclasses:: OptimizationPlanAtomicElement, OptimizationPlanCompositeElement

public abstract class OptimizationPlanElement
extends Object
extends Object

An element in the opt compiler's optimization plan.

NOTE: Instances of subclasses of this class are held in OptimizationPlanner.masterPlan and thus represent global state. It is therefore incorrect for any per-compilation state to be stored in an instance field of one of these objects.

TODO: refactor the optimization plan elements and compiler phases

Constructor Summary
`OptimizationPlanElement()`

Method Summary
`abstract double`	`elapsedTime()` Report the elapsed time spent in the PlanElement
`abstract String`	`getName()`
`abstract void`	`initializeForMeasureCompilation()` This method is called to initialize the optimization plan support measuring compilation.
`abstract void`	`perform(IR ir)` Do the work represented by this element in the optimization plan.
`protected void`	`prettyPrintTime(double time, double totalTime)` Helper function for `reportStats`
`abstract void`	`reportStats(int indent, int timeCol, double totalTime)` Generate (to the sysWrite stream) a report of the time spent performing this element of the optimization plan.
`abstract boolean`	`shouldPerform(OptOptions options)` Determine, possibly by consulting the passed options object, if this optimization plan element should be performed.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

OptimizationPlanElement

public OptimizationPlanElement()

Method Detail

shouldPerform

public abstract boolean shouldPerform(OptOptions options)

Determine, possibly by consulting the passed options object, if this optimization plan element should be performed.

Parameters:: options - The Options object for the current compilation.
Returns:: true if the plan element should be performed.

perform

public abstract void perform(IR ir)

Do the work represented by this element in the optimization plan. The assumption is that the work will modify the IR in some way.

Parameters:: ir - The IR object to work with.

getName

public abstract String getName()

Returns:: a String which is the name of the phase.

initializeForMeasureCompilation

public abstract void initializeForMeasureCompilation()

This method is called to initialize the optimization plan support measuring compilation.

reportStats

public abstract void reportStats(int indent,
                                 int timeCol,
                                 double totalTime)

Generate (to the sysWrite stream) a report of the time spent performing this element of the optimization plan.

Parameters:: indent - Number of spaces to indent report.; timeCol - Column number of time portion of report.; totalTime - Total opt compilation time in seconds.

elapsedTime

public abstract double elapsedTime()

Report the elapsed time spent in the PlanElement

Returns:: time spend in the plan (in ms)

prettyPrintTime

protected void prettyPrintTime(double time,
                               double totalTime)

Helper function for reportStats