/*
 * Copyright (C) 2012 RoboVM AB
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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/gpl-2.0.html>.
 */
package org.robovm.compiler.llvm;

import java.util.Collections;
import java.util.Set;

/**
 *
 * @version $Id$
 */
public abstract class UnaryOpInstruction extends Instruction {
    protected final Variable result;
    protected final Value op;

    protected UnaryOpInstruction(Variable result, Value op) {
        this.result = result;
        this.op = op;
    }
    
    @Override
    public Set<Variable> getWritesTo() {
        return Collections.singleton(result);
    }
    
    @Override
    public Set<VariableRef> getReadsFrom() {
        if (op instanceof VariableRef) {
            return Collections.singleton((VariableRef) op);
        }
        return super.getReadsFrom();
    }
}