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jode/jode/CombineCatchLocal.java

55 lines
1.9 KiB

/*
* CombineCatchLocal (c) 1998 Jochen Hoenicke
*
* You may distribute under the terms of the GNU General Public License.
*
* IN NO EVENT SHALL JOCHEN HOENICKE BE LIABLE TO ANY PARTY FOR DIRECT,
* INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF
* THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF JOCHEN HOENICKE
* HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* JOCHEN HOENICKE SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
* BASIS, AND JOCHEN HOENICKE HAS NO OBLIGATION TO PROVIDE MAINTENANCE,
* SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* $Id$
*/
package jode;
import java.util.Vector;
import sun.tools.java.Identifier;
public class CombineCatchLocal implements Transformation{
// static Identifier idException = Identifier.lookup("exception");
public InstructionHeader transform(InstructionHeader ih) {
CatchInstructionHeader catchIH;
LocalInfo local;
try {
catchIH = (CatchInstructionHeader)ih;
ih = ih.nextInstruction;
if (ih.getPredecessors().size() != 1)
return null;
Instruction instr = ih.getInstruction();
if (instr instanceof PopOperator) {
local = new LocalInfo(99);
} else if (instr instanceof LocalStoreOperator) {
local = ((LocalStoreOperator) instr).getLocalInfo();
} else
return null;
} catch (ClassCastException ex) {
return null;
} catch (NullPointerException ex) {
return null;
}
if (!catchIH.combineWithLocal(local))
return null;
if(Decompiler.isVerbose)
System.err.print("c");
return catchIH;
}
}