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The GraalVM compiler and the Graal-truffle optimizer.

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/*
 * Copyright (c) 2009, 2022, 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
 * or visit www.oracle.com if you need additional information or have any
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 */
package org.graalvm.compiler.nodes;

import org.graalvm.compiler.core.common.type.Stamp;
import org.graalvm.compiler.graph.NodeClass;
import org.graalvm.compiler.nodeinfo.NodeInfo;

/**
 * Base class of all nodes that are fixed within the control flow graph and have an immediate
 * successor.
 */
@NodeInfo
public abstract class FixedWithNextNode extends FixedNode implements FixedWithNextNodeInterface {
    public static final NodeClass TYPE = NodeClass.create(FixedWithNextNode.class);

    @Successor protected FixedNode next;

    public FixedNode next() {
        return next;
    }

    public void setNext(FixedNode x) {
        updatePredecessor(next, x);
        next = x;
    }

    public FixedWithNextNode(NodeClass c, Stamp stamp) {
        super(c, stamp);
    }

    /* This method is final to ensure that it can be de-virtualized and inlined. */
    @Override
    public final FixedWithNextNode asFixedWithNextNode() {
        return this;
    }
}