01: /*
02: * ProGuard -- shrinking, optimization, obfuscation, and preverification
03: * of Java bytecode.
04: *
05: * Copyright (c) 2002-2007 Eric Lafortune (eric@graphics.cornell.edu)
06: *
07: * This program is free software; you can redistribute it and/or modify it
08: * under the terms of the GNU General Public License as published by the Free
09: * 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.Clazz;
24: import proguard.classfile.attribute.CodeAttribute;
25: import proguard.evaluation.BasicBranchUnit;
26: import proguard.evaluation.value.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 extends BasicBranchUnit {
34: // Implementations for BranchUnit.
35:
36: public void branchConditionally(Clazz clazz,
37: CodeAttribute codeAttribute, int offset, int branchTarget,
38: int conditional) {
39: if (conditional == Value.ALWAYS) {
40: // Always branch.
41: super .branch(clazz, codeAttribute, offset, branchTarget);
42: } else if (conditional != Value.NEVER) {
43: // Maybe branch.
44: super.branchConditionally(clazz, codeAttribute, offset,
45: branchTarget, conditional);
46: } else {
47: super.setCalled();
48: }
49: }
50: }
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