/*
 * Copyright (c) 2012, 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.
 *
 * 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
 * questions.
 */
package com.oracle.max.vm.ext.graal.nodes;


import com.oracle.graal.nodes.*;
import com.oracle.graal.nodes.spi.*;
import com.oracle.graal.nodes.type.*;

public final class UnreachableNode extends FixedWithNextNode implements Simplifiable {

    public UnreachableNode() {
        super(StampFactory.object());
    }

    @Override
    public void simplify(SimplifierTool tool) {
        tool.deleteBranch(next());
        replaceAtPredecessor(graph().add(new DeadEndNode()));
        safeDelete();
    }

    public static class DeadEndNode extends ControlSinkNode implements LIRLowerable {

        public DeadEndNode() {
            super(StampFactory.forVoid());
        }

        @Override
        public void generate(LIRGeneratorTool generator) {
            // No code to emit since this node represents an unreachable code path.
        }

    }

    @NodeIntrinsic
    public static native RuntimeException unreachable();
}
