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.

DEBUG

static final boolean DEBUG

See Also:

Constant Field Values

InsertYieldpointCounters

public InsertYieldpointCounters()

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