/*
 * Copyright (c) 2012, 2015, 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.graal.nodes;

import com.oracle.graal.compiler.common.*;
import com.oracle.graal.graph.*;
import com.oracle.graal.graph.spi.*;
import com.oracle.graal.nodeinfo.*;
import com.oracle.graal.nodes.spi.*;

/**
 * This node will be inserted at point specified by {@link StructuredGraph#getEntryBCI()}, usually
 * by the graph builder.
 */
@NodeInfo(allowedUsageTypes = {InputType.Association})
public final class EntryMarkerNode extends BeginStateSplitNode implements IterableNodeType, Simplifiable, LIRLowerable {
    public static final NodeClass<EntryMarkerNode> TYPE = NodeClass.create(EntryMarkerNode.class);

    public EntryMarkerNode() {
        super(TYPE);
    }

    @Override
    public void simplify(SimplifierTool tool) {
        // this node should not be removed, this overrides BeginNode.simplify
    }

    @Override
    public void generate(NodeLIRBuilderTool gen) {
        throw new GraalInternalError("OnStackReplacementNode should not survive");
    }
}