/*
 * 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 java.util.ArrayList;

import net.sf.orcc.df.Actor;
import net.sf.orcc.ir.Def;
import net.sf.orcc.ir.IrFactory;
import net.sf.orcc.ir.Procedure;
import net.sf.orcc.ir.Use;
import net.sf.orcc.ir.Var;
import net.sf.orcc.ir.util.AbstractIrVisitor;
import net.sf.orcc.ir.util.IrUtil;
import net.sf.orcc.util.Void;
import net.sf.orcc.util.util.EcoreHelper;

import org.eclipse.emf.common.util.EList;

/**
 * Replace local arrays by global ones.
 * 
 * @author Herve Yviquel
 * 
 */
public class LocalArrayRemoval extends AbstractIrVisitor<Void> {

	@Override
	public Void caseProcedure(Procedure procedure) {
		Actor actor = EcoreHelper.getContainerOfType(procedure, Actor.class);
		EList<Var> stateVars = actor.getStateVars();
		for (Var var : new ArrayList<Var>(procedure.getLocals())) {
			if (var.getType().isList()) {
				Var newVar = IrFactory.eINSTANCE.createVar(var.getType(),
						var.getName() + "_" + procedure.getName(), true,
						var.getIndex());
				newVar.setInitialValue(var.getInitialValue());

				EList<Use> uses = var.getUses();
				while (!uses.isEmpty()) {
					uses.get(0).setVariable(newVar);
				}
				EList<Def> defs = var.getDefs();
				while (!defs.isEmpty()) {
					defs.get(0).setVariable(newVar);
				}

				IrUtil.delete(var);
				stateVars.add(newVar);
			}
		}
		return null;
	}
}