01: /* Soot - a J*va Optimization Framework
02: * Copyright (C) 2003 Jennifer Lhotak
03: *
04: * This library is free software; you can redistribute it and/or
05: * modify it under the terms of the GNU Lesser General Public
06: * License as published by the Free Software Foundation; either
07: * version 2.1 of the License, or (at your option) any later version.
08: *
09: * 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: package soot.jimple.toolkits.callgraph;
21:
22: import soot.*;
23: import java.util.*;
24: import soot.toolkits.graph.*;
25: import soot.toolkits.scalar.*;
26:
27: public class ClinitElimTransformer extends BodyTransformer {
28:
29: protected void internalTransform(Body b, String phaseName,
30: Map options) {
31: ClinitElimAnalysis a = new ClinitElimAnalysis(
32: new BriefUnitGraph(b));
33:
34: CallGraph cg = Scene.v().getCallGraph();
35:
36: SootMethod m = b.getMethod();
37:
38: Iterator edgeIt = cg.edgesOutOf(m);
39:
40: while (edgeIt.hasNext()) {
41: Edge e = (Edge) edgeIt.next();
42: if (e.srcStmt() == null)
43: continue;
44: if (!e.isClinit())
45: continue;
46: FlowSet methods = (FlowSet) a.getFlowBefore(e.srcStmt());
47: if (methods.contains(e.tgt())) {
48: cg.removeEdge(e);
49: }
50: }
51: }
52: }
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