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Java > Open Source Codes > proguard > optimize > evaluation > TracedBranchUnit


1 /*
2  * ProGuard -- shrinking, optimization, obfuscation, and preverification
3  * of Java bytecode.
4  *
5  * Copyright (c) 2002-2007 Eric Lafortune (eric@graphics.cornell.edu)
6  *
7  * This program is free software; you can redistribute it and/or modify it
8  * under the terms of the GNU General Public License as published by the Free
9  * Software Foundation; either version 2 of the License, or (at your option)
10  * any later version.
11  *
12  * This program is distributed in the hope that it will be useful, but WITHOUT
13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15  * more details.
16  *
17  * You should have received a copy of the GNU General Public License along
18  * with this program; if not, write to the Free Software Foundation, Inc.,
19  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20  */
21 package proguard.optimize.evaluation;
22
23 import proguard.classfile.*;
24 import proguard.classfile.attribute.*;
25 import proguard.evaluation.*;
26 import proguard.evaluation.value.*;
27
28 /**
29  * This BranchUnit remembers the branch unit commands that are invoked on it.
30  *
31  * @author Eric Lafortune
32  */
33 class TracedBranchUnit
34 extends BasicBranchUnit
35 {
36     // Implementations for BranchUnit.
37
38     public void branchConditionally(Clazz clazz,
39                                     CodeAttribute codeAttribute,
40                                     int offset,
41                                     int branchTarget,
42                                     int conditional)
43     {
44         if (conditional == Value.ALWAYS)
45         {
46             // Always branch.
47 super.branch(clazz, codeAttribute, offset, branchTarget);
48         }
49         else if (conditional != Value.NEVER)
50         {
51             // Maybe branch.
52 super.branchConditionally(clazz, codeAttribute, offset, branchTarget, conditional);
53         }
54         else
55         {
56             super.setCalled();
57         }
58     }
59 }
60
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