001/*
002 * Copyright (c) 2012, 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 com.oracle.graal.compiler.common.type.*;
026import com.oracle.graal.graph.*;
027import com.oracle.graal.nodeinfo.*;
028
029/**
030 * Provides an implementation of {@link StateSplit}.
031 */
032@NodeInfo
033public abstract class AbstractStateSplit extends FixedWithNextNode implements StateSplit {
034
035    public static final NodeClass<AbstractStateSplit> TYPE = NodeClass.create(AbstractStateSplit.class);
036    @OptionalInput(InputType.State) protected FrameState stateAfter;
037
038    public FrameState stateAfter() {
039        return stateAfter;
040    }
041
042    public void setStateAfter(FrameState x) {
043        assert x == null || x.isAlive() : "frame state must be in a graph";
044        updateUsages(stateAfter, x);
045        stateAfter = x;
046    }
047
048    public boolean hasSideEffect() {
049        return true;
050    }
051
052    protected AbstractStateSplit(NodeClass<? extends AbstractStateSplit> c, Stamp stamp) {
053        this(c, stamp, null);
054    }
055
056    protected AbstractStateSplit(NodeClass<? extends AbstractStateSplit> c, Stamp stamp, FrameState stateAfter) {
057        super(c, stamp);
058        this.stateAfter = stateAfter;
059    }
060}