harpoon.Analysis.Transactions
Class ArrayCopyImplementer

java.lang.Object
  harpoon.ClassFile.CachingCodeFactory
      harpoon.Analysis.Transactions.ArrayCopyImplementer

All Implemented Interfaces:

HCodeFactory, SerializableCodeFactory, Serializable

public class ArrayCopyImplementer
extends CachingCodeFactory

ArrayCopyImplementer adds a pure-java implementation of the System.arraycopy() method. Our implementation is defined in harpoon.Runtime.ArrayCopy.

Arguably, this class should belong in the harpoon.Analysis.Quads package, but we'll leave it here until someone other than the Transactions transformation needs it.

When we implement better array bounds check elimination in loops, the version implemented here should have performance equivalent (or better than) the native version. Better, we should be able to inline this version and eliminate lots of checks in most cases.

Version:

$Id: ArrayCopyImplementer.java,v 1.5 2003/10/03 19:46:33 cananian Exp $

Author:

C. Scott Ananian <cananian@alumni.princeton.edu>

See Also:

Serialized Form

Field Summary

Fields inherited from class harpoon.ClassFile.CachingCodeFactory

parent

Constructor Summary

ArrayCopyImplementer(HCodeFactory parent, Linker l)
Creates a ArrayCopyImplementer.

Method Summary

HCode

convert(HMethod m) Convert a method to an HCode, caching the result.

Methods inherited from class harpoon.ClassFile.CachingCodeFactory

clear, getCodeName, put

Methods inherited from class java.lang.Object

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

Constructor Detail

ArrayCopyImplementer

public ArrayCopyImplementer(HCodeFactory parent,
                            Linker l)

Creates a ArrayCopyImplementer.

Method Detail

convert

public HCode convert(HMethod m)

Description copied from class: CachingCodeFactory

Convert a method to an HCode, caching the result. Cached representations of m in parent are cleared when this CachingCodeFactory adds the converted representation of m to its cache.

Specified by:

convert in interface HCodeFactory

Overrides:

convert in class CachingCodeFactory