Mercurial > hg > truffle

annotate graal/com.oracle.graal.graph/src/com/oracle/graal/graph/NodeFlood.java @ 21391:8cc395785d0a

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Expand functionality of FieldIntrospection
author Christian Wimmer <christian.wimmer@oracle.com>
date Thu, 14 May 2015 16:17:36 -0700
parents 6bff0b223124
children
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1 /*
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2 * Copyright (c) 2011, 2011, 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.graph;
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24
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64dcb92ee75a Truffle: Change signature for Truffle calls from (PackedFrame, Arguments) to (Object[]).
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25 import java.util.*;
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27 public final class NodeFlood implements Iterable<Node> {
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29 private final NodeBitMap visited;
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30 private final Queue<Node> worklist;
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31 private int totalMarkedCount;
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32
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33 public NodeFlood(Graph graph) {
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34 visited = graph.createNodeBitMap();
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35 worklist = new ArrayDeque<>();
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36 }
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37
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38 public void add(Node node) {
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39 if (node != null && !visited.isMarked(node)) {
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40 visited.mark(node);
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41 worklist.add(node);
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42 totalMarkedCount++;
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43 }
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44 }
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45
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46 public int getTotalMarkedCount() {
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47 return totalMarkedCount;
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48 }
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49
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50 public void addAll(Iterable<? extends Node> nodes) {
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51 for (Node node : nodes) {
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52 this.add(node);
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53 }
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54 }
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55
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56 public NodeBitMap getVisited() {
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57 return visited;
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58 }
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59
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60 public boolean isMarked(Node node) {
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61 return visited.isMarked(node);
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62 }
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63
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64 public boolean isNew(Node node) {
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65 return visited.isNew(node);
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66 }
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67
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68 private static class QueueConsumingIterator implements Iterator<Node> {
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69
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70 private final Queue<Node> queue;
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71
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72 public QueueConsumingIterator(Queue<Node> queue) {
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73 this.queue = queue;
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74 }
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75
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76 @Override
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77 public boolean hasNext() {
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78 return !queue.isEmpty();
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79 }
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80
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81 @Override
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82 public Node next() {
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83 return queue.remove();
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84 }
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85
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86 @Override
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87 public void remove() {
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88 throw new UnsupportedOperationException();
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89 }
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90 }
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91
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92 @Override
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93 public Iterator<Node> iterator() {
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94 return new QueueConsumingIterator(worklist);
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95 }
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96
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97 private static class UnmarkedNodeIterator implements Iterator<Node> {
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98
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99 private final NodeBitMap visited;
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100 private Iterator<Node> nodes;
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101 private Node nextNode;
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102
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103 public UnmarkedNodeIterator(NodeBitMap visited, Iterator<Node> nodes) {
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104 this.visited = visited;
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105 this.nodes = nodes;
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106 forward();
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107 }
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108
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109 private void forward() {
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110 do {
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111 if (!nodes.hasNext()) {
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112 nextNode = null;
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113 return;
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114 }
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115 nextNode = nodes.next();
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116 } while (visited.isMarked(nextNode));
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117 }
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118
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119 @Override
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120 public boolean hasNext() {
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121 return nextNode != null;
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122 }
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123
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124 @Override
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125 public Node next() {
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126 try {
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127 return nextNode;
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128 } finally {
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129 forward();
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130 }
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131 }
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132
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133 @Override
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134 public void remove() {
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135 throw new UnsupportedOperationException();
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136 }
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137 }
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138
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139 public Iterable<Node> unmarkedNodes() {
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140 return new Iterable<Node>() {
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141
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142 @Override
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143 public Iterator<Node> iterator() {
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144 return new UnmarkedNodeIterator(visited, visited.graph().getNodes().iterator());
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145 }
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146 };
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147 }
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148 }