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annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/RootNode.java @ 14565:9c01fabfb167

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Truffle: Removed deprecated API; Added NodeFilter to customize filter when counting nodes.
author Christian Humer <christian.humer@gmail.com>
date Mon, 17 Mar 2014 14:29:45 +0100
parents dd2c23065f47
children 6681b9eb3f4c
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1 /*
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2 * Copyright (c) 2012, 2013, 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. Oracle designates this
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8 * particular file as subject to the "Classpath" exception as provided
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9 * by Oracle in the LICENSE file that accompanied this code.
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10 *
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11 * This code is distributed in the hope that it will be useful, but WITHOUT
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 * version 2 for more details (a copy is included in the LICENSE file that
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15 * accompanied this code).
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16 *
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17 * You should have received a copy of the GNU General Public License version
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18 * 2 along with this work; if not, write to the Free Software Foundation,
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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20 *
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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22 * or visit www.oracle.com if you need additional information or have any
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23 * questions.
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24 */
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25 package com.oracle.truffle.api.nodes;
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26
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27 import java.util.*;
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28
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29 import com.oracle.truffle.api.*;
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30 import com.oracle.truffle.api.frame.*;
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31
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32 /**
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33 * A root node is a node with a method to execute it given only a frame as a parameter. Therefore, a
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34 * root node can be used to create a call target using
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35 * {@link TruffleRuntime#createCallTarget(RootNode)}.
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36 */
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37 public abstract class RootNode extends Node {
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38
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39 private CallTarget callTarget;
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40 private final FrameDescriptor frameDescriptor;
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41
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42 /*
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43 * Internal set to keep back-references to the call-sites.
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44 */
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45 private final Set<CallNode> cachedCallNodes = Collections.newSetFromMap(new WeakHashMap<CallNode, Boolean>());
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46
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47 protected RootNode() {
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48 this(null, null);
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49 }
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50
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51 protected RootNode(SourceSection sourceSection) {
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52 this(sourceSection, null);
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53 }
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54
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55 protected RootNode(SourceSection sourceSection, FrameDescriptor frameDescriptor) {
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56 super(sourceSection);
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57 if (frameDescriptor == null) {
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58 this.frameDescriptor = new FrameDescriptor();
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59 } else {
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60 this.frameDescriptor = frameDescriptor;
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61 }
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62 }
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63
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64 public RootNode split() {
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65 return NodeUtil.cloneNode(this);
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66 }
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67
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68 public boolean isSplittable() {
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69 return false;
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70 }
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71
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72 /**
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73 * Reports the execution count of a loop that is a child of this node. The optimization
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74 * heuristics can use the loop count to guide compilation and inlining.
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75 */
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76 public void reportLoopCount(int count) {
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77 if (getCallTarget() instanceof LoopCountReceiver) {
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78 ((LoopCountReceiver) getCallTarget()).reportLoopCount(count);
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79 }
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80 }
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81
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82 /**
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83 * Executes this function using the specified frame and returns the result value.
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84 *
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85 * @param frame the frame of the currently executing guest language method
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86 * @return the value of the execution
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87 */
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88 public abstract Object execute(VirtualFrame frame);
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89
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90 public CallTarget getCallTarget() {
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91 return callTarget;
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92 }
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93
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94 public final FrameDescriptor getFrameDescriptor() {
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95 return frameDescriptor;
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96 }
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97
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98 public final void setCallTarget(CallTarget callTarget) {
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99 this.callTarget = callTarget;
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100 }
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101
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102 /* Internal API. Do not use. */
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103 void addCachedCallNode(CallNode callSite) {
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104 this.cachedCallNodes.add(callSite);
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105 }
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106
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107 /* Internal API. Do not use. */
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108 void removeCachedCallNode(CallNode callSite) {
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109 this.cachedCallNodes.remove(callSite);
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110 }
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111
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112 /**
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113 * Returns a {@link Set} of {@link CallNode} nodes which are created to invoke this RootNode.
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114 * This method does not make any guarantees to contain all the {@link CallNode} nodes that are
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115 * invoking this method. Due to its weak nature the elements returned by this method may change
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116 * with each consecutive call.
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117 *
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118 * @return a set of {@link CallNode} nodes
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119 */
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120 public final Set<CallNode> getCachedCallNodes() {
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121 return Collections.unmodifiableSet(cachedCallNodes);
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122 }
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123
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124 }