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Java > Open Source Codes > soot > jimple > toolkits > annotation > AvailExprTagger


1 /* Soot - a J*va Optimization Framework
2  * Copyright (C) 2003 Jennifer Lhotak
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 package soot.jimple.toolkits.annotation;
21 import soot.*;
22 import java.util.*;
23 import soot.toolkits.graph.*;
24 import soot.toolkits.scalar.*;
25 import soot.tagkit.*;
26 import soot.jimple.*;
27 import soot.options.*;
28 import soot.util.*;
29 import soot.jimple.toolkits.pointer.*;
30 import soot.jimple.toolkits.scalar.*;
31
32 /** A body transformer that records avail expression
33  * information in tags. - both pessimistic and optimistic options*/
34 public class AvailExprTagger extends BodyTransformer
35 {
36     public AvailExprTagger( Singletons.Global g ) {}
37     public static AvailExprTagger v() { return G.v().soot_jimple_toolkits_annotation_AvailExprTagger(); }
38
39     protected void internalTransform(
40             Body b, String JavaDoc phaseName, Map opts)
41     {
42
43         SideEffectTester sideEffect;
44         if( Scene.v().hasCallGraph()
45             && !PhaseOptions.getBoolean( opts, "naive-side-effect" ) ) {
46             sideEffect = new PASideEffectTester();
47         }
48         else {
49             sideEffect = new NaiveSideEffectTester();
50         }
51         sideEffect.newMethod( b.getMethod() );
52                                 
53         SlowAvailableExpressionsAnalysis analysis;
54         
55         AETOptions options = new AETOptions(opts);
56         if (options.kind() == AETOptions.kind_optimistic){
57             analysis = new SlowAvailableExpressionsAnalysis(new ExceptionalUnitGraph(b));
58         }
59         else {
60             analysis = new PessimisticAvailableExpressionsAnalysis(new ExceptionalUnitGraph(b), b.getMethod(), sideEffect);
61         }
62     }
63 }
64
65
66
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