Mirror of the BLOAT repository
https://www.cs.purdue.edu/homes/hosking/bloat/
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53 lines
1.5 KiB
53 lines
1.5 KiB
/**
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* All files in the distribution of BLOAT (Bytecode Level Optimization and
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* Analysis tool for Java(tm)) are Copyright 1997-2001 by the Purdue
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* Research Foundation of Purdue University. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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package EDU.purdue.cs.bloat.editor;
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import java.util.*;
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import EDU.purdue.cs.bloat.tree.*;
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public class UseMap {
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public Hashtable map;
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public UseMap() {
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map = new Hashtable();
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}
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public void add(final LocalExpr use, final Instruction inst) {
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final Node def = use.def();
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if (def != null) {
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map.put(inst, def);
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}
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}
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public boolean hasDef(final Instruction inst) {
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return map.containsKey(inst);
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}
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public boolean hasSameDef(final Instruction a, final Instruction b) {
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return map.containsKey(a) && map.containsKey(b)
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&& (map.get(a) == map.get(b));
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}
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}
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