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Java > Open Source Codes > soot > toolkits > graph > BriefUnitGraph


1 /* Soot - a J*va Optimization Framework
2  * Copyright (C) 1999 Patrice Pominville, Raja Vallee-Rai
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with this library; if not, write to the
16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17  * Boston, MA 02111-1307, USA.
18  */
19
20 /*
21  * Modified by the Sable Research Group and others 1997-2003.
22  * See the 'credits' file distributed with Soot for the complete list of
23  * contributors. (Soot is distributed at http://www.sable.mcgill.ca/soot)
24  */
25
26
27 package soot.toolkits.graph;
28
29
30 import soot.*;
31 import soot.util.*;
32 import java.util.*;
33 import soot.options.Options;
34
35
36 /**
37  * Represents a CFG where the nodes are Unit instances, and
38  * where no edges are included to account for control flow
39  * associated with exceptions.
40  *
41  * @see Unit
42  * @see UnitGraph
43  */
44 public class BriefUnitGraph extends UnitGraph
45 {
46     /**
47      * Constructs a BriefUnitGraph given a Body instance.
48      * @param body The underlying body we want to make a
49      * graph for.
50      */
51     public BriefUnitGraph(Body body)
52     {
53         super(body);
54     int size = unitChain.size();
55
56         if(Options.v().time())
57             Timers.v().graphTimer.start();
58
59     unitToSuccs = new HashMap(size * 2 + 1, 0.7f);
60     unitToPreds = new HashMap(size * 2 + 1, 0.7f);
61     buildUnexceptionalEdges(unitToSuccs, unitToPreds);
62     makeMappedListsUnmodifiable(unitToSuccs);
63     makeMappedListsUnmodifiable(unitToPreds);
64
65     buildHeadsAndTails();
66
67         if(Options.v().time())
68             Timers.v().graphTimer.end();
69
70     soot.util.PhaseDumper.v().dumpGraph(this, body);
71     }
72 }
73
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