001/*
002 * Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.nodes;
024
025import jdk.internal.jvmci.common.*;
026
027import com.oracle.graal.graph.*;
028import com.oracle.graal.graph.spi.*;
029import com.oracle.graal.nodeinfo.*;
030import com.oracle.graal.nodes.spi.*;
031
032/**
033 * This node will be inserted at point specified by {@link StructuredGraph#getEntryBCI()}, usually
034 * by the graph builder.
035 */
036@NodeInfo(allowedUsageTypes = {InputType.Association})
037public final class EntryMarkerNode extends BeginStateSplitNode implements IterableNodeType, Simplifiable, LIRLowerable {
038    public static final NodeClass<EntryMarkerNode> TYPE = NodeClass.create(EntryMarkerNode.class);
039
040    public EntryMarkerNode() {
041        super(TYPE);
042    }
043
044    @Override
045    public void simplify(SimplifierTool tool) {
046        // this node should not be removed, this overrides BeginNode.simplify
047    }
048
049    @Override
050    public void generate(NodeLIRBuilderTool gen) {
051        throw new JVMCIError("OnStackReplacementNode should not survive");
052    }
053}