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The GraalVM compiler and the Graal-truffle optimizer.

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/*
 * Copyright (c) 2009, 2018, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package jdk.graal.compiler.nodes;

import static jdk.graal.compiler.nodeinfo.NodeCycles.CYCLES_0;
import static jdk.graal.compiler.nodeinfo.NodeSize.SIZE_1;

import jdk.graal.compiler.core.common.type.Stamp;
import jdk.graal.compiler.graph.NodeClass;
import jdk.graal.compiler.nodeinfo.NodeInfo;
import jdk.graal.compiler.nodeinfo.Verbosity;
import jdk.graal.compiler.nodes.calc.FloatingNode;

@NodeInfo(cycles = CYCLES_0, size = SIZE_1)
public abstract class AbstractLocalNode extends FloatingNode {

    public static final NodeClass TYPE = NodeClass.create(AbstractLocalNode.class);
    protected final int index;

    protected AbstractLocalNode(NodeClass c, int index, Stamp stamp) {
        super(c, stamp);
        this.index = index;
    }

    /**
     * Gets the index of this local in the array of parameters. This is NOT the JVM local index.
     *
     * @return the index
     */
    public int index() {
        return index;
    }

    @Override
    public String toString(Verbosity verbosity) {
        if (verbosity == Verbosity.Name) {
            return super.toString(Verbosity.Name) + "(" + index + ")";
        } else {
            return super.toString(verbosity);
        }
    }
}