harpoon.IR.Quads
Class QuadSSA

java.lang.Object
  harpoon.ClassFile.HCode<Quad>
      harpoon.IR.Quads.Code
          harpoon.IR.Quads.QuadSSA

All Implemented Interfaces:

Graph<Quad,Edge>, Serializable

public class QuadSSA
extends Code

Quads.QuadSSA is a code view in SSA form. Quad form exposes the details of the java classfile bytecodes in a pseudo-quadruple format. Implementation details of the stack-based JVM are hidden in favor of a flat consistent temporary-variable based approach. The generated quadruples adhere to an SSA form; that is, every variable has exactly one definition, and PHI functions are used where control flow merges.

Version:

$Id: QuadSSA.java,v 1.3 2002/09/01 07:47:20 cananian Exp $

Author:

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

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class harpoon.ClassFile.HCode

HCode.PrintCallback<HCE extends HCodeElement>

Nested classes/interfaces inherited from interface harpoon.Util.Collections.Graph

Graph.Edge<N extends Graph.Node<N,E>,E extends Graph.Edge<N,E>>, Graph.Node<N extends Graph.Node<N,E>,E extends Graph.Edge<N,E>>

Field Summary

static String

codename The name of this code view.

Fields inherited from class harpoon.IR.Quads.Code

ai, parent, qf, quads

Constructor Summary

protected	QuadSSA(HMethod parent, Quad quads) Create a new code object given a quadruple representation of the method instructions.
	QuadSSA(QuadSSI code) Creates a Code object from a bytecode object.

Method Summary

HCodeAndMaps<Quad>	clone(HMethod newMethod) Clone this code representation.
static HCodeFactory	codeFactory() Return a code factory for QuadSSA, using the default code factory for QuadSSI.
static HCodeFactory	codeFactory(HCodeFactory hcf) Return a code factory for QuadSSA, given a code factory for QuadNoSSA.
String	getName() Return the name of this code view.

Methods inherited from class harpoon.IR.Quads.Code

cloneHelper, cloneHelper, elementArrayFactory, getAllocationInformation, getDerivation, getElements, getElementsI, getLeafElements, getMethod, getRootElement, newQF, nodes, notifyReplace, print, selectAllocations, selectCALLs, selectQuads, setAllocationInformation

Methods inherited from class harpoon.ClassFile.HCode

clone, elementIndexer, getElementsL, print, toString

Methods inherited from class java.lang.Object

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

Field Detail

codename

public static final String codename

The name of this code view.

See Also:

Constant Field Values

Constructor Detail

QuadSSA

public QuadSSA(QuadSSI code)

Creates a Code object from a bytecode object.

QuadSSA

protected QuadSSA(HMethod parent,
                  Quad quads)

Create a new code object given a quadruple representation of the method instructions.

Method Detail

clone

public HCodeAndMaps<Quad> clone(HMethod newMethod)

Clone this code representation. The clone has its own copy of the quad graph.

Specified by:

clone in class Code

getName

public String getName()

Return the name of this code view.

Specified by:

getName in class Code

Returns:

the string "quad-ssa".

codeFactory

public static HCodeFactory codeFactory(HCodeFactory hcf)

Return a code factory for QuadSSA, given a code factory for QuadNoSSA. Given a code factory for Bytecode or QuadWithTry, chain through QuadNoSSA.codeFactory().

codeFactory

public static HCodeFactory codeFactory()

Return a code factory for QuadSSA, using the default code factory for QuadSSI.