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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/java/RegisterFinalizerNode.java @ 16895:06c15e88d383

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added factory method to all Node classes; replaced Node classes instantiation with calls to factory methods; replaced identity tests on Node classes with ' == <node class>.getGenClass()' idiom
author Doug Simon <doug.simon@oracle.com>
date Mon, 18 Aug 2014 14:04:21 +0200
parents cbd42807a31f
children f90dcdbbb75e
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1 /*
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2 * Copyright (c) 2011, 2014, 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 static com.oracle.graal.nodes.java.ForeignCallDescriptors.*;
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26
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27 import com.oracle.graal.api.code.*;
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28 import com.oracle.graal.compiler.common.type.*;
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29 import com.oracle.graal.graph.spi.*;
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30 import com.oracle.graal.nodeinfo.*;
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31 import com.oracle.graal.nodes.*;
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32 import com.oracle.graal.nodes.spi.*;
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33
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34 /**
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35 * This node is used to perform the finalizer registration at the end of the java.lang.Object
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36 * constructor.
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37 */
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38 @NodeInfo
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39 public class RegisterFinalizerNode extends AbstractStateSplit implements Canonicalizable.Unary<ValueNode>, LIRLowerable, Virtualizable, DeoptimizingNode.DeoptAfter {
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40
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41 @OptionalInput(InputType.State) private FrameState deoptState;
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42 @Input private ValueNode value;
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43
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44 public static RegisterFinalizerNode create(ValueNode value) {
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45 return new RegisterFinalizerNodeGen(value);
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46 }
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48 RegisterFinalizerNode(ValueNode value) {
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49 super(StampFactory.forVoid());
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50 this.value = value;
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51 }
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52
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53 public ValueNode getValue() {
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54 return value;
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55 }
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56
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57 @Override
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58 public void generate(NodeLIRBuilderTool gen) {
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59 ForeignCallLinkage linkage = gen.getLIRGeneratorTool().getForeignCalls().lookupForeignCall(REGISTER_FINALIZER);
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60 gen.getLIRGeneratorTool().emitForeignCall(linkage, gen.state(this), gen.operand(getValue()));
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61 }
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62
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63 @Override
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64 public ValueNode canonical(CanonicalizerTool tool, ValueNode forValue) {
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65 if (!(forValue.stamp() instanceof ObjectStamp)) {
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66 return this;
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67 }
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68
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69 ObjectStamp stamp = (ObjectStamp) forValue.stamp();
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70
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71 boolean needsCheck = true;
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72 if (stamp.isExactType()) {
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73 needsCheck = stamp.type().hasFinalizer();
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74 } else if (stamp.type() != null && !stamp.type().hasFinalizableSubclass()) {
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75 // if either the declared type of receiver or the holder
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76 // can be assumed to have no finalizers
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77 if (tool.assumptions().useOptimisticAssumptions()) {
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78 tool.assumptions().recordNoFinalizableSubclassAssumption(stamp.type());
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79 needsCheck = false;
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80 }
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81 }
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82
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83 if (!needsCheck) {
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84 return null;
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85 }
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87 return this;
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88 }
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89
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90 @Override
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91 public void virtualize(VirtualizerTool tool) {
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92 State state = tool.getObjectState(getValue());
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93 if (state != null && !state.getVirtualObject().type().hasFinalizer()) {
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94 tool.delete();
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95 }
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96 }
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97
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98 @Override
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99 public boolean canDeoptimize() {
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100 return true;
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101 }
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102
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103 @SuppressWarnings("unused")
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104 @NodeIntrinsic
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105 public static void register(Object thisObj) {
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106 }
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107 }