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56 lines
1.9 KiB
56 lines
1.9 KiB
/*
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* CreateForInitializer (c) 1998 Jochen Hoenicke
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*
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* You may distribute under the terms of the GNU General Public License.
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*
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* IN NO EVENT SHALL JOCHEN HOENICKE BE LIABLE TO ANY PARTY FOR DIRECT,
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* INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF
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* THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF JOCHEN HOENICKE
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* HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* JOCHEN HOENICKE SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
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* BASIS, AND JOCHEN HOENICKE HAS NO OBLIGATION TO PROVIDE MAINTENANCE,
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* SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* $Id$
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*/
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package jode.flow;
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import jode.Expression;
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import jode.StoreInstruction;
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public class CreateForInitializer {
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/**
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* This combines an variable initializer into a for statement
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* @param forBlock the for block
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* @param last the lastModified of the flow block.
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*/
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public static boolean transform(LoopBlock forBlock, StructuredBlock last) {
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if (!(last.outer instanceof SequentialBlock))
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return false;
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SequentialBlock sequBlock = (SequentialBlock) last.outer;
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if (!(sequBlock.subBlocks[0] instanceof InstructionBlock))
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return false;
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Expression initializer =
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((InstructionBlock) sequBlock.subBlocks[0]).getInstruction();
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if (!initializer.getOperator().isVoid()
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|| (forBlock.cond != forBlock.TRUE
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&& !forBlock.cond.containsMatchingLoad(initializer)))
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return false;
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if (jode.Decompiler.isVerbose)
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System.err.print('f');
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forBlock.init = (InstructionBlock) sequBlock.subBlocks[0];
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last.replace(sequBlock);
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return true;
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}
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}
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