1 cananian 1.1.2.1 // MOVE.java, created Wed Aug 5 06:53:38 1998 by cananian
2 cananian 1.1.2.1 // Copyright (C) 1998 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.Quads;
5 cananian 1.1.2.1
6 cananian 1.1.2.6 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 1.1.2.2 import harpoon.Util.Util;
10 cananian 1.1.2.1
11 cananian 1.1.2.1 /**
12 cananian 1.1.2.1 * <code>MOVE</code> objects represent an assignment to a compiler temporary.
13 cananian 1.1.2.1 * The source of the assignment must be another temporary.
14 cananian 1.1.2.1 *
15 cananian 1.1.2.1 * @author C. Scott Ananian <cananian@alumni.princeton.edu>
16 cananian 1.5 * @version $Id: MOVE.java,v 1.5 2002/04/11 04:00:34 cananian Exp $
17 cananian 1.1.2.1 */
18 cananian 1.1.2.1 public class MOVE extends Quad {
19 cananian 1.1.2.2 /** The destination <code>Temp</code>. */
20 cananian 1.1.2.2 protected Temp dst;
21 cananian 1.1.2.2 /** The source <code>Temp</code>. */
22 cananian 1.1.2.2 protected Temp src;
23 cananian 1.1.2.1
24 cananian 1.1.2.2 /** Creates a <code>MOVE</code> from a source and destination
25 cananian 1.1.2.2 * <code>Temp</code>.
26 cananian 1.1.2.2 * @param dst the destination <code>Temp</code>.
27 cananian 1.1.2.2 * @param src the source <code>Temp</code>.
28 cananian 1.1.2.2 */
29 cananian 1.1.2.4 public MOVE(QuadFactory qf, HCodeElement source,
30 cananian 1.1.2.1 Temp dst, Temp src) {
31 cananian 1.1.2.4 super(qf, source);
32 cananian 1.1.2.1 this.dst = dst; this.src = src;
33 cananian 1.3.2.1 assert dst!=null && src!=null;
34 cananian 1.1.2.1 }
35 cananian 1.1.2.2 // ACCESSOR METHODS:
36 cananian 1.1.2.2 /** Returns the destination <code>Temp</code>. */
37 cananian 1.1.2.2 public Temp dst() { return dst; }
38 cananian 1.1.2.2 /** Returns the source <code>Temp</code>. */
39 cananian 1.1.2.2 public Temp src() { return src; }
40 cananian 1.1.2.1
41 cananian 1.1.2.2 /** Returns the <code>Temp</code>s used by this <code>Quad</code>. */
42 cananian 1.1.2.1 public Temp[] use() { return new Temp[] { src }; }
43 cananian 1.1.2.2 /** Returns the <code>Temp</code>s defined by this <code>Quad</code>. */
44 cananian 1.1.2.1 public Temp[] def() { return new Temp[] { dst }; }
45 cananian 1.1.2.1
46 cananian 1.1.2.3 public int kind() { return QuadKind.MOVE; }
47 cananian 1.1.2.3
48 cananian 1.1.2.5 public Quad rename(QuadFactory qqf, TempMap defMap, TempMap useMap) {
49 cananian 1.1.2.5 return new MOVE(qqf, this, map(defMap, dst), map(useMap, src));
50 cananian 1.1.2.3 }
51 cananian 1.1.2.2 /** Rename all defined variables in this <code>Quad</code> according
52 cananian 1.1.2.5 * to a mapping.
53 cananian 1.1.2.5 * @deprecated does not preserve immutability. */
54 cananian 1.1.2.3 void renameDefs(TempMap tm) {
55 cananian 1.1.2.1 dst = tm.tempMap(dst);
56 cananian 1.1.2.1 }
57 cananian 1.1.2.2 /** Rename all used variables in this <code>Quad</code> according
58 cananian 1.1.2.5 * to a mapping.
59 cananian 1.1.2.5 * @deprecated does not preserve immutability. */
60 cananian 1.1.2.3 void renameUses(TempMap tm) {
61 cananian 1.1.2.1 src = tm.tempMap(src);
62 cananian 1.1.2.1 }
63 cananian 1.1.2.1
64 cananian 1.1.2.7 public void accept(QuadVisitor v) { v.visit(this); }
65 cananian 1.5 public <T> T accept(QuadValueVisitor<T> v) { return v.visit(this); }
66 cananian 1.1.2.1
67 cananian 1.1.2.2 /** Returns a human-readable representation of this <code>Quad</code>. */
68 cananian 1.1.2.1 public String toString() {
69 cananian 1.1.2.1 return dst.toString() + " = MOVE " + src.toString();
70 cananian 1.1.2.1 }
71 cananian 1.2 }