1 cananian 1.1.2.15 // LowQuadNoSSA.java, created Wed Feb 3 1:02:14 1999 by duncan
2 cananian 1.1.2.14 // Copyright (C) 1998 Duncan Bryce <duncan@lcs.mit.edu>
3 cananian 1.1.2.14 // Licensed under the terms of the GNU GPL; see COPYING for details.
4 duncan 1.1.2.1 package harpoon.IR.LowQuad;
5 duncan 1.1.2.1
6 cananian 1.1.2.21 import harpoon.Analysis.Maps.Derivation;
7 duncan 1.1.2.1 import harpoon.ClassFile.HCode;
8 cananian 1.1.2.28 import harpoon.ClassFile.HCodeAndMaps;
9 duncan 1.1.2.1 import harpoon.ClassFile.HCodeFactory;
10 duncan 1.1.2.1 import harpoon.ClassFile.HMethod;
11 duncan 1.1.2.1 import harpoon.IR.Quads.Quad;
12 duncan 1.1.2.2 import harpoon.IR.Quads.ToNoSSA;
13 duncan 1.1.2.1
14 duncan 1.1.2.1 /**
15 duncan 1.1.2.16 * The <code>LowQuadNoSSA</code> codeview exposes a lowquad-based
16 duncan 1.1.2.16 * representation. The distinguishing characteristic of this codeview
17 duncan 1.1.2.16 * is that is not in SSA form. What this means is that, although there
18 duncan 1.1.2.16 * are still PHI and SIGMA quads in this codeview, they do not actually
19 cananian 1.1.2.22 * assign values to temporaries. In other words, PHI and SIGMA nodes
20 cananian 1.1.2.22 * exist solely to indicate flow of control in a program, but they will
21 cananian 1.1.2.22 * always be empty.
22 duncan 1.1.2.1 *
23 duncan 1.1.2.1 * @author Duncan Bryce <duncan@lcs.mit.edu>
24 cananian 1.3 * @version $Id: LowQuadNoSSA.java,v 1.3 2003/03/10 22:19:14 cananian Exp $
25 duncan 1.1.2.1 */
26 duncan 1.1.2.16 public class LowQuadNoSSA extends Code {/*which extends harpoon.IR.Quads.Code*/
27 duncan 1.1.2.16 /** The name of this code view. */
28 duncan 1.1.2.16 public static final String codename = "low-quad-no-ssa";
29 duncan 1.1.2.16
30 duncan 1.1.2.16 /** Creates a <code>LowQuadNoSSA</code> object from a LowQuad object */
31 cananian 1.1.2.23 LowQuadNoSSA(LowQuadSSI code) {
32 duncan 1.1.2.16 super(code.getMethod(), null);
33 duncan 1.1.2.8
34 duncan 1.1.2.16 ToNoSSA translator;
35 duncan 1.1.2.8
36 cananian 1.1.2.29 translator = new ToNoSSA(qf, code, (Derivation)code.getDerivation());
37 duncan 1.1.2.16 quads = translator.getQuads();
38 cananian 1.1.2.27 setDerivation(translator.getDerivation());
39 cananian 1.1.2.25 setAllocationInformation(translator.getAllocationInformation());
40 duncan 1.1.2.1 }
41 duncan 1.1.2.8
42 duncan 1.1.2.16 /**
43 duncan 1.1.2.16 * Create a new code object given a quadruple representation of the
44 duncan 1.1.2.16 * method instructions.
45 duncan 1.1.2.16 */
46 bdemsky 1.1.2.26 protected LowQuadNoSSA(HMethod method, Quad quads) {
47 duncan 1.1.2.16 super(method, quads);
48 duncan 1.1.2.16 }
49 duncan 1.1.2.16
50 duncan 1.1.2.16 /**
51 duncan 1.1.2.16 * Clone this code representation. The clone has its own copy of the
52 duncan 1.1.2.16 * quad graph.
53 duncan 1.1.2.16 */
54 cananian 1.3 public HCodeAndMaps<Quad> clone(HMethod newMethod) {
55 cananian 1.1.2.28 return cloneHelper(new LowQuadNoSSA(newMethod, null));
56 duncan 1.1.2.16 }
57 duncan 1.1.2.16
58 duncan 1.1.2.16 /**
59 duncan 1.1.2.16 * Return the name of this code view.
60 duncan 1.1.2.16 * @return the string <code>"low-quad-no-ssa"</code>
61 duncan 1.1.2.16 */
62 duncan 1.1.2.16 public String getName() { return codename; }
63 duncan 1.1.2.16
64 duncan 1.1.2.16 /**
65 duncan 1.1.2.16 * Return a code factory for <code>LowQuadNoSSA</code>, given a
66 cananian 1.1.2.23 * code factory for either <code>LowQuadSSI</code>.
67 duncan 1.1.2.16 * <BR> <B>effects:</B> if <code>hcf</code> is a code factory for
68 cananian 1.1.2.23 * <code>LowQuadSSI</code>, then creates and returns a code
69 duncan 1.1.2.16 * factory for <code>LowQuadNoSSA</code>. Else passes
70 duncan 1.1.2.16 * <code>hcf</code> to
71 cananian 1.1.2.23 * <code>LowQuadSSI.codeFactory()</code>, and reattempts to
72 duncan 1.1.2.16 * create a code factory for <code>LowQuadNoSSA</code> from the
73 cananian 1.1.2.23 * code factory returned by <code>LowQuadSSI</code>.
74 cananian 1.1.2.23 * @see LowQuadSSI#codeFactory(HCodeFactory)
75 duncan 1.1.2.16 */
76 duncan 1.1.2.16 public static HCodeFactory codeFactory(final HCodeFactory hcf) {
77 cananian 1.1.2.30 if (hcf.getCodeName().equals(codename)) return hcf;
78 cananian 1.1.2.23 if (hcf.getCodeName().equals(LowQuadSSI.codename)) {
79 cananian 1.1.2.17 return new harpoon.ClassFile.SerializableCodeFactory() {
80 duncan 1.1.2.16 public HCode convert(HMethod m) {
81 duncan 1.1.2.16 HCode c = hcf.convert(m);
82 cananian 1.1.2.23 return (c==null) ? null : new LowQuadNoSSA((LowQuadSSI)c);
83 duncan 1.1.2.16 }
84 duncan 1.1.2.16 public void clear(HMethod m) { hcf.clear(m); }
85 duncan 1.1.2.16 public String getCodeName() { return codename; }
86 duncan 1.1.2.16 };
87 duncan 1.1.2.16 }
88 duncan 1.1.2.16 else {
89 pnkfelix 1.1.2.11 //throw new Error("don't know how to make " + codename +
90 pnkfelix 1.1.2.11 // " from " + hcf.getCodeName());
91 cananian 1.1.2.23 return codeFactory(LowQuadSSI.codeFactory(hcf));
92 duncan 1.1.2.1 }
93 duncan 1.1.2.1 }
94 duncan 1.1.2.1
95 duncan 1.1.2.16 /**
96 duncan 1.1.2.16 * Return a code factory for <code>LowQuadNoSSA</code>, using the default
97 cananian 1.1.2.23 * code factory for <code>LowQuadSSI</code>
98 duncan 1.1.2.16 */
99 duncan 1.1.2.16 public static HCodeFactory codeFactory() {
100 cananian 1.1.2.23 return codeFactory(LowQuadSSI.codeFactory());
101 duncan 1.1.2.1 }
102 cananian 1.2 }