org.jikesrvm.adaptive.recompilation.instrumentation

Class InsertYieldpointCounters

java.lang.Object

org.jikesrvm.compilers.opt.driver.CompilerPhase

org.jikesrvm.adaptive.recompilation.instrumentation.InsertYieldpointCounters

public class InsertYieldpointCounters
extends CompilerPhase

An opt compiler phase that inserts yieldpoint counters. Searches for all yieldpoint instructions and inserts an increment after them, using the CounterArrayManager counter manager to implement the counters.

Field Summary

Fields

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

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

container

Constructor Summary

Constructors

Constructor and Description
InsertYieldpointCounters()

Method Summary

Modifier and Type	Method and Description
String	getName()
CompilerPhase	newExecution(IR ir) Return this instance of this phase.
void	perform(IR ir) counters after all yieldpoint instructions
boolean	shouldPerform(OptOptions options) This method determines if the phase should be run, based on the Options object it is passed.
private static String	yieldpointPrefix(Operator op) Return a string based version of the passed yieldpoint operator

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

See Also:

Constant Field Values

Constructor Detail

InsertYieldpointCounters

public InsertYieldpointCounters()

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)

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.

perform

public final void perform(IR ir)

counters after all yieldpoint instructions

Specified by:

perform in class CompilerPhase

Parameters:

ir - the governing IR

yieldpointPrefix

private static String yieldpointPrefix(Operator op)

Return a string based version of the passed yieldpoint operator

Parameters:

op - the yieldpoint operator

Returns:

a string based on the type of yieldpoint operator