harpoon.Analysis.PreciseGC
Class AllocationHoisting

java.lang.Object
  harpoon.Analysis.Transformation.MethodSplitter
      harpoon.Analysis.PreciseGC.AllocationHoisting

All Implemented Interfaces:

Serializable

public class AllocationHoisting
extends MethodSplitter

AllocationHoisting

Version:

$Id: AllocationHoisting.java,v 1.6 2004/02/08 03:20:07 cananian Exp $

Author:

Karen Zee <kkz@tmi.lcs.mit.edu>

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class harpoon.Analysis.Transformation.MethodSplitter

MethodSplitter.Token

Field Summary

static MethodSplitter.Token

HOISTED Token for the hoisted version of an initializer.

Fields inherited from class harpoon.Analysis.Transformation.MethodSplitter

ORIGINAL

Constructor Summary

AllocationHoisting(HCodeFactory parent, ClassHierarchy ch, Linker l, String rName, int optLevel)
Creates an AllocationHoisting.

Method Summary

protected HCodeAndMaps	cloneHCode(HCode hc, HMethod newmethod) Clones HCode and creates an iMap2 entry for the cloned code.
protected boolean	isValidToken(MethodSplitter.Token which) Check the validity of a given MethodSplitter.Token.
protected String	mutateDescriptor(HMethod hm, MethodSplitter.Token which) Adds parameter to descriptors of mutated methods.
protected HCode	mutateHCode(HCodeAndMaps input, MethodSplitter.Token which) Hoists allocation out of the split method.

Methods inherited from class harpoon.Analysis.Transformation.MethodSplitter

codeFactory, isVirtual, mutateCodeName, select

Methods inherited from class java.lang.Object

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

Field Detail

HOISTED

public static final MethodSplitter.Token HOISTED

Token for the hoisted version of an initializer.

Constructor Detail

AllocationHoisting

public AllocationHoisting(HCodeFactory parent,
                          ClassHierarchy ch,
                          Linker l,
                          String rName,
                          int optLevel)

Creates an AllocationHoisting. For efficiency, parent should be a CachingCodeFactory.

Parameters:

parent - The input code factory.

ch - A class hierarchy for the application.

Method Detail

mutateDescriptor

protected String mutateDescriptor(HMethod hm,
                                  MethodSplitter.Token which)

Adds parameter to descriptors of mutated methods.

Overrides:

mutateDescriptor in class MethodSplitter

mutateHCode

protected HCode mutateHCode(HCodeAndMaps input,
                            MethodSplitter.Token which)

Hoists allocation out of the split method.

Overrides:

mutateHCode in class MethodSplitter

cloneHCode

protected HCodeAndMaps cloneHCode(HCode hc,
                                  HMethod newmethod)
                           throws CloneNotSupportedException

Clones HCode and creates an iMap2 entry for the cloned code.

Overrides:

cloneHCode in class MethodSplitter

Throws:

CloneNotSupportedException

isValidToken

protected boolean isValidToken(MethodSplitter.Token which)

Check the validity of a given MethodSplitter.Token.

Overrides:

isValidToken in class MethodSplitter