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.phases.common;
024
025import com.oracle.graal.nodes.*;
026import com.oracle.graal.nodes.util.*;
027import com.oracle.graal.phases.*;
028
029public class RemoveValueProxyPhase extends Phase {
030
031    @Override
032    protected void run(StructuredGraph graph) {
033        for (ProxyNode vpn : graph.getNodes(ProxyNode.TYPE)) {
034            if (vpn instanceof ValueProxyNode) {
035                graph.replaceFloating(vpn, vpn.value());
036            }
037        }
038        for (LoopExitNode exit : graph.getNodes(LoopExitNode.TYPE)) {
039            FrameState stateAfter = exit.stateAfter();
040            if (stateAfter != null) {
041                exit.setStateAfter(null);
042                if (stateAfter.hasNoUsages()) {
043                    GraphUtil.killWithUnusedFloatingInputs(stateAfter);
044                }
045            }
046        }
047        graph.setHasValueProxies(false);
048    }
049}