1 cananian 1.1.2.1 // PFIELD.java, created Wed Jan 20 21:47:52 1999 by cananian
2 cananian 1.1.2.1 // Copyright (C) 1999 C. Scott Ananian <cananian@alumni.princeton.edu>
3 cananian 1.1.2.1 // Licensed under the terms of the GNU GPL; see COPYING for details.
4 cananian 1.1.2.1 package harpoon.IR.LowQuad;
5 cananian 1.1.2.1
6 cananian 1.1.2.1 import harpoon.ClassFile.HCodeElement;
7 cananian 1.1.2.1 import harpoon.Temp.Temp;
8 cananian 1.1.2.1 import harpoon.Temp.TempMap;
9 cananian 1.1.2.1
10 cananian 1.1.2.1 /**
11 cananian 1.1.2.1 * <code>PFIELD</code> converts an object reference into a
12 cananian 1.1.2.1 * <code>POINTER</code> value that can be used to access
13 cananian 1.1.2.1 * <b>non-static</b> object fields. <code>PFCONST</code> is
14 cananian 1.1.2.1 * used to access static fields.
15 cananian 1.1.2.1 *
16 cananian 1.1.2.1 * @author C. Scott Ananian <cananian@alumni.princeton.edu>
17 cananian 1.3 * @version $Id: PFIELD.java,v 1.3 2002/04/11 04:00:21 cananian Exp $
18 cananian 1.1.2.1 */
19 cananian 1.1.2.1 public class PFIELD extends PPTR {
20 cananian 1.1.2.1
21 cananian 1.1.2.1 /** Creates a <code>PFIELD</code> representing a conversion
22 cananian 1.1.2.1 * from an object reference into a <code>POINTER</code> that
23 cananian 1.1.2.1 * can be used to reference <b>non-static</b> object fields.
24 cananian 1.1.2.1 * @param dst
25 cananian 1.1.2.1 * the <code>Temp</code> in which to store the computed
26 cananian 1.1.2.1 * <code>POINTER</code>.
27 cananian 1.1.2.1 * @param objectref
28 cananian 1.1.2.1 * the <code>Temp</code> holding the reference for the object
29 cananian 1.1.2.1 * whose fields we would like to access.
30 cananian 1.1.2.1 */
31 cananian 1.1.2.1 public PFIELD(LowQuadFactory qf, HCodeElement source,
32 cananian 1.1.2.1 final Temp dst, final Temp objectref) {
33 cananian 1.1.2.1 super(qf, source, dst, objectref);
34 cananian 1.1.2.1 }
35 cananian 1.1.2.1
36 cananian 1.1.2.1 public int kind() { return LowQuadKind.PFIELD; }
37 cananian 1.1.2.1
38 cananian 1.1.2.1 public harpoon.IR.Quads.Quad rename(harpoon.IR.Quads.QuadFactory qf,
39 cananian 1.1.2.1 TempMap defMap, TempMap useMap) {
40 cananian 1.1.2.1 return new PFIELD((LowQuadFactory)qf, this,
41 cananian 1.1.2.1 map(defMap, dst), map(useMap, objectref));
42 cananian 1.1.2.1 }
43 cananian 1.1.2.1
44 cananian 1.1.2.2 void accept(LowQuadVisitor v) { v.visit(this); }
45 cananian 1.3 <T> T accept(LowQuadValueVisitor<T> v) { return v.visit(this); }
46 cananian 1.1.2.1
47 cananian 1.1.2.1 public String toString() {
48 cananian 1.1.2.1 return dst.toString() + " = PFIELD " + objectref.toString();
49 cananian 1.1.2.1 }
50 cananian 1.2 }