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annotate graal/com.oracle.graal.java/src/com/oracle/graal/java/DefaultGraphBuilderPluginsProvider.java @ 19067:ed8ce7fb8dc2

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extra javadoc
author Doug Simon <doug.simon@oracle.com>
date Mon, 02 Feb 2015 21:38:15 +0100
parents 75da87c96605
children 0499dbe2da01
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1 /*
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2 * Copyright (c) 2015, 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.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.api.runtime.*;
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28 import com.oracle.graal.compiler.common.type.*;
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29 import com.oracle.graal.nodes.*;
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30 import com.oracle.graal.nodes.java.*;
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31
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32 /**
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33 * Provider of non-runtime specific {@link GraphBuilderPlugin}s.
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34 */
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35 @ServiceProvider(GraphBuilderPluginsProvider.class)
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36 public class DefaultGraphBuilderPluginsProvider implements GraphBuilderPluginsProvider {
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37 public void registerPlugins(MetaAccessProvider metaAccess, GraphBuilderPlugins plugins) {
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38 plugins.register(metaAccess, ObjectPlugin.class);
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39 }
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40
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41 /**
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42 * Plugins for {@link Object}.
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43 */
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44 enum ObjectPlugin implements GraphBuilderPlugin {
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45 init() {
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46 public boolean handleInvocation(GraphBuilderContext builder, ValueNode[] args) {
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47 assert args.length == 1;
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48 ValueNode rcvr = args[0];
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49 ObjectStamp objectStamp = (ObjectStamp) rcvr.stamp();
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50
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51 boolean needsCheck = true;
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52 if (objectStamp.isExactType()) {
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53 needsCheck = objectStamp.type().hasFinalizer();
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54 } else if (objectStamp.type() != null && !objectStamp.type().hasFinalizableSubclass()) {
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55 // if either the declared type of receiver or the holder
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56 // can be assumed to have no finalizers
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57 Assumptions assumptions = builder.getAssumptions();
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58 if (assumptions.useOptimisticAssumptions()) {
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59 assumptions.recordNoFinalizableSubclassAssumption(objectStamp.type());
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60 needsCheck = false;
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61 }
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62 }
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63
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64 if (needsCheck) {
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65 builder.append(new RegisterFinalizerNode(rcvr));
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66 }
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67 return true;
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68 }
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69
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70 public ResolvedJavaMethod getInvocationTarget(MetaAccessProvider metaAccess) {
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71 return GraphBuilderPlugin.resolveTarget(metaAccess, Object.class, "<init>");
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72 }
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73 };
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74
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75 @Override
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76 public String toString() {
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77 return Object.class.getName() + "." + name() + "()";
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78 }
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79 }
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80 }