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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/java/MonitorExitNode.java @ 16811:5d468add216f

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added @NodeInfo annotations to all Node classes
author Doug Simon <doug.simon@oracle.com>
date Wed, 13 Aug 2014 18:25:45 +0200
parents 394b949fec5a
children cbd42807a31f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.graal.nodes.java;
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24
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25 import com.oracle.graal.api.code.*;
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26 import com.oracle.graal.api.meta.*;
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27 import com.oracle.graal.graph.*;
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28 import com.oracle.graal.graph.spi.*;
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29 import com.oracle.graal.nodes.*;
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30 import com.oracle.graal.nodes.extended.*;
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31 import com.oracle.graal.nodes.spi.*;
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32
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33 /**
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34 * The {@code MonitorExitNode} represents a monitor release. If it is the release of the monitor of
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35 * a synchronized method, then the return value of the method will be referenced, so that it will be
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36 * materialized before releasing the monitor.
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37 */
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38 @NodeInfo
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39 public class MonitorExitNode extends AccessMonitorNode implements Virtualizable, Simplifiable, Lowerable, IterableNodeType, MonitorExit, MemoryCheckpoint.Single {
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40
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41 @OptionalInput private ValueNode escapedReturnValue;
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42
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43 /**
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44 * Creates a new MonitorExitNode.
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45 */
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46 public MonitorExitNode(ValueNode object, MonitorIdNode monitorId, ValueNode escapedReturnValue) {
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47 super(object, monitorId);
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48 this.escapedReturnValue = escapedReturnValue;
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49 }
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50
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51 public ValueNode getEscapedReturnValue() {
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52 return escapedReturnValue;
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53 }
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54
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55 public void setEscapedReturnValue(ValueNode x) {
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56 updateUsages(escapedReturnValue, x);
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57 this.escapedReturnValue = x;
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58 }
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59
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60 @Override
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61 public LocationIdentity getLocationIdentity() {
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62 return LocationIdentity.ANY_LOCATION;
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63 }
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65 @Override
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66 public void simplify(SimplifierTool tool) {
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67 if (escapedReturnValue != null && stateAfter() != null && stateAfter().bci != BytecodeFrame.AFTER_BCI) {
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68 ValueNode returnValue = escapedReturnValue;
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69 setEscapedReturnValue(null);
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70 tool.removeIfUnused(returnValue);
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71 }
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72 }
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73
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74 @Override
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75 public void lower(LoweringTool tool) {
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76 tool.getLowerer().lower(this, tool);
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77 }
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78
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79 @Override
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80 public void virtualize(VirtualizerTool tool) {
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81 State state = tool.getObjectState(object());
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82 // the monitor exit for a synchronized method should never be virtualized
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83 assert stateAfter().bci != BytecodeFrame.AFTER_BCI || state == null;
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84 if (state != null && state.getState() == EscapeState.Virtual && state.getVirtualObject().hasIdentity()) {
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85 MonitorIdNode removedLock = state.removeLock();
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86 assert removedLock == getMonitorId() : "mismatch at " + this + ": " + removedLock + " vs. " + getMonitorId();
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87 tool.delete();
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88 }
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89 }
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90 }