/*
* Copyright (c) 2011, IRISA
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of the IRISA nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
* WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
package net.sf.orcc.backends.transform;
import net.sf.orcc.ir.BlockIf;
import net.sf.orcc.ir.BlockWhile;
import net.sf.orcc.ir.IrFactory;
import net.sf.orcc.ir.util.AbstractIrVisitor;
import net.sf.orcc.util.Void;
/**
* Remove empty block from if and while block.
*
* @author Herve Yviquel
* @author Jerome Gorin
*/
public class EmptyBlockRemover extends AbstractIrVisitor<Void> {
private static IrFactory factory = IrFactory.eINSTANCE;
@Override
public Void caseBlockIf(BlockIf blockIf) {
if (blockIf.getThenBlocks().isEmpty()) {
blockIf.getThenBlocks().add(factory.createBlockBasic());
}
if (blockIf.getElseBlocks().isEmpty()) {
blockIf.getElseBlocks().add(factory.createBlockBasic());
}
return super.caseBlockIf(blockIf);
}
@Override
public Void caseBlockWhile(BlockWhile blockWhile) {
if (blockWhile.getBlocks().isEmpty()) {
blockWhile.getBlocks().add(factory.createBlockBasic());
}
return super.caseBlockWhile(blockWhile);
}
}