/* This file is part of the db4o object database http://www.db4o.com
Copyright (C) 2004 - 2011 Versant Corporation http://www.versant.com
db4o is free software; you can redistribute it and/or modify it under
the terms of version 3 of the GNU General Public License as published
by the Free Software Foundation.
db4o is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License along
with this program. If not, see http://www.gnu.org/licenses/. */
package EDU.purdue.cs.bloat.editor;
import java.util.*;
import EDU.purdue.cs.bloat.tree.*;
public class UseMap {
public Hashtable map;
public UseMap() {
map = new Hashtable();
}
public void add(final LocalExpr use, final Instruction inst) {
final Node def = use.def();
if (def != null) {
map.put(inst, def);
}
}
public boolean hasDef(final Instruction inst) {
return map.containsKey(inst);
}
public boolean hasSameDef(final Instruction a, final Instruction b) {
return map.containsKey(a) && map.containsKey(b)
&& (map.get(a) == map.get(b));
}
}