br.usp.each.saeg.asm.defuse.Merge Maven / Gradle / Ivy

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/**
 * asm-defuse: asm powered by definitions/uses analysis
 * Copyright (c) 2013, 2020 Roberto Araujo ([email protected])
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. Neither the name of the copyright holders 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 br.usp.each.saeg.asm.defuse;

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

import org.objectweb.asm.Type;
import org.objectweb.asm.tree.AbstractInsnNode;

public class Merge extends CacheableVariablesValue {

    public final Value value1;

    public final Value value2;

    public Merge(final Type type, final Value value1, final Value value2) {
        super(type);
        this.value1 = value1;
        this.value2 = value2;
    }

    public Merge(final Type type, final Value v, final Value w, final Set insns) {
        super(type, insns);
        value1 = v;
        value2 = w;
    }

    @Override
    public Set initVariables() {
        final Set values = new LinkedHashSet();
        values.addAll(value1.getVariables());
        values.addAll(value2.getVariables());
        return Collections.unmodifiableSet(values);
    }

    @Override
    public String toString() {
        return String.format("(%s,%s)", value1, value2);
    }

}