org.apache.commons.nabla.forward.trimming
Class BytecodeTrimmer

java.lang.Object
  org.apache.commons.nabla.forward.trimming.BytecodeTrimmer

Direct Known Subclasses:

DLoadPop2Trimmer, SwappedDloadTrimmer, SwappedDstoreTrimmer

public abstract class BytecodeTrimmer
extends Object

Base class for code trimmers.

Version:

$Id$

Constructor Summary

protected

BytecodeTrimmer(int lookahead) Simple constructor.

Method Summary

void	trim(org.objectweb.asm.tree.InsnList instructions) Trim a list of instructions.
protected abstract boolean	trimWindow(org.objectweb.asm.tree.InsnList instructions, org.objectweb.asm.tree.AbstractInsnNode[] window) Trim the current window of lookahead instructions.

Methods inherited from class java.lang.Object

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

Constructor Detail

BytecodeTrimmer

protected BytecodeTrimmer(int lookahead)

Simple constructor.

Parameters:

lookahead - number of lookahead instructions

Method Detail

trim

public void trim(org.objectweb.asm.tree.InsnList instructions)

Trim a list of instructions.

Parameters:

instructions - list of instructions to optimize

trimWindow

protected abstract boolean trimWindow(org.objectweb.asm.tree.InsnList instructions,
                                      org.objectweb.asm.tree.AbstractInsnNode[] window)

Trim the current window of lookahead instructions.

Parameters:

instructions - complete instructions list of instructions to trim

window - current instructions window (belongs to the list)

Returns:

true if instructions and window have been updated and are ready for next iteration