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annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/Node.java @ 14584:6189c1983cd3

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Truffle: make Node#replace accept any CharSequence as reason
author Andreas Woess <andreas.woess@jku.at>
date Tue, 18 Mar 2014 13:14:53 +0100
parents 6681b9eb3f4c
children a08b8694f556
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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.io.*;
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28 import java.lang.annotation.*;
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29 import java.util.*;
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30
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31 import com.oracle.truffle.api.*;
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32
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33 /**
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34 * Abstract base class for all Truffle nodes.
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35 */
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36 public abstract class Node implements Cloneable {
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37
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38 private Node parent;
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39
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40 private SourceSection sourceSection;
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41
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42 /**
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43 * Marks array fields that are children of this node.
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44 */
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45 @Retention(RetentionPolicy.RUNTIME)
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46 @Target({ElementType.FIELD})
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47 public @interface Children {
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48 }
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49
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50 /**
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51 * Marks fields that represent child nodes of this node.
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52 */
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53 @Retention(RetentionPolicy.RUNTIME)
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54 @Target({ElementType.FIELD})
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55 public @interface Child {
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56 }
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57
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58 protected Node() {
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59 CompilerAsserts.neverPartOfCompilation();
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60 }
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61
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62 protected Node(SourceSection sourceSection) {
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63 CompilerAsserts.neverPartOfCompilation();
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64 this.sourceSection = sourceSection;
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65 }
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66
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67 /**
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68 * Assigns a link to a guest language source section to this node.
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69 *
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70 * @param section the object representing a section in guest language source code
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71 */
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72 public final void assignSourceSection(SourceSection section) {
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73 if (sourceSection != null) {
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74 // Patch this test during the transition to constructor-based
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75 // source attribution, which would otherwise trigger this
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76 // exception. This method will eventually be deprecated.
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77 if (getSourceSection() != section) {
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78 throw new IllegalStateException("Source section is already assigned. Old: " + getSourceSection() + ", new: " + section);
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79 }
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80 }
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81 this.sourceSection = section;
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82 }
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83
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84 /**
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85 * Returns a rough estimate for the cost of this {@link Node}. This estimate can be used by
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86 * runtime systems or guest languages to implement heuristics based on Truffle ASTs. This method
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87 * is intended to be overridden by subclasses. The default implementation returns the value of
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88 * {@link NodeInfo#cost()} of the {@link NodeInfo} annotation declared at the subclass. If no
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89 * {@link NodeInfo} annotation is declared the method returns {@link NodeCost#MONOMORPHIC} as a
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90 * default value.
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91 */
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92 public NodeCost getCost() {
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93 NodeInfo info = getClass().getAnnotation(NodeInfo.class);
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94 if (info != null) {
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95 return info.cost();
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96 }
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97 return NodeCost.MONOMORPHIC;
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98 }
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99
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100 /**
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101 * Clears any previously assigned guest language source code from this node.
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102 */
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103 public final void clearSourceSection() {
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104 this.sourceSection = null;
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105 }
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106
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107 /**
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108 * Retrieves the guest language source code section that is currently assigned to this node.
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109 *
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110 * @return the assigned source code section
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111 */
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112 public final SourceSection getSourceSection() {
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113 return sourceSection;
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114 }
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115
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116 /**
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117 * Retrieves the guest language source code section that is currently assigned to this node.
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118 *
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119 * @return the assigned source code section
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120 */
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121 @CompilerDirectives.SlowPath
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122 public final SourceSection getEncapsulatingSourceSection() {
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123 if (sourceSection == null && getParent() != null) {
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124 return getParent().getEncapsulatingSourceSection();
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125 }
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126 return sourceSection;
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127 }
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128
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129 /**
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130 * Method that updates the link to the parent in the array of specified new child nodes to this
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131 * node.
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132 *
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133 * @param newChildren the array of new children whose parent should be updated
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134 * @return the array of new children
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135 */
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136 protected final <T extends Node> T[] adoptChildren(T[] newChildren) {
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137 if (newChildren != null) {
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138 for (T n : newChildren) {
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139 adoptChild(n);
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140 }
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141 }
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142 return newChildren;
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143 }
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144
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145 /**
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146 * Method that updates the link to the parent in the specified new child node to this node.
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147 *
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148 * @param newChild the new child whose parent should be updated
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149 * @return the new child
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150 */
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151 protected final <T extends Node> T adoptChild(T newChild) {
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152 if (newChild != null) {
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153 if (newChild == this) {
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154 throw new IllegalStateException("The parent of a node can never be the node itself.");
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155 }
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156 ((Node) newChild).parent = this;
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157 }
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158 return newChild;
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159 }
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160
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161 /**
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162 * Returns properties of this node interesting for debugging and can be overwritten by
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163 * subclasses to add their own custom properties.
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164 *
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165 * @return the properties as a key/value hash map
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166 */
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167 public Map<String, Object> getDebugProperties() {
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168 Map<String, Object> properties = new HashMap<>();
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169 return properties;
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170 }
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171
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172 /**
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173 * The current parent node of this node.
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174 *
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175 * @return the parent node
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176 */
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177 public final Node getParent() {
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178 return parent;
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179 }
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180
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181 /**
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182 * Replaces this node with another node. If there is a source section (see
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183 * {@link #getSourceSection()}) associated with this node, it is transferred to the new node.
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184 *
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185 * @param newNode the new node that is the replacement
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186 * @param reason a description of the reason for the replacement
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187 * @return the new node
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188 */
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189 public final <T extends Node> T replace(T newNode, CharSequence reason) {
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190 CompilerDirectives.transferToInterpreterAndInvalidate();
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191 if (this.getParent() == null) {
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parents: 9782
diff changeset
192 throw new IllegalStateException("This node cannot be replaced, because it does not yet have a parent.");
29e9a5d18c70 Clean up.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 9782
diff changeset
193 }
11648
4ab1f371adc8 Do not assign new source section if replacing node already has source section assigned.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 11610
diff changeset
194 if (sourceSection != null && newNode.getSourceSection() == null) {
9256
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parents: 9255
diff changeset
195 // Pass on the source section to the new node.
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parents: 9255
diff changeset
196 newNode.assignSourceSection(sourceSection);
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parents: 9255
diff changeset
197 }
9782
ba02d19dd3cc Added an onReplace method to Node to provide a way for a guest language implementation to use replace tracing.
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parents: 9256
diff changeset
198 onReplace(newNode, reason);
12494
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parents: 11951
diff changeset
199 ((Node) newNode).parent = this.parent;
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parents: 11951
diff changeset
200 if (!NodeUtil.replaceChild(this.parent, this, newNode)) {
57b8a41c0e18 Truffle: fix possible node rewrite failures after recursive calls.
Andreas Woess <andreas.woess@jku.at>
parents: 11951
diff changeset
201 fixupTree();
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Andreas Woess <andreas.woess@jku.at>
parents: 11951
diff changeset
202 }
13983
f46cab39a9a2 Truffle: Updated inlining API. Pushed inlining implementation to the Truffle runtime.
Christian Humer <christian.humer@gmail.com>
parents: 13915
diff changeset
203 reportReplace(this, newNode, reason);
12494
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parents: 11951
diff changeset
204 return newNode;
7267
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parents:
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205 }
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parents:
diff changeset
206
12494
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parents: 11951
diff changeset
207 /**
57b8a41c0e18 Truffle: fix possible node rewrite failures after recursive calls.
Andreas Woess <andreas.woess@jku.at>
parents: 11951
diff changeset
208 * Rewrite has failed; the tree is likely inconsistent, so fix any stale parent references.
57b8a41c0e18 Truffle: fix possible node rewrite failures after recursive calls.
Andreas Woess <andreas.woess@jku.at>
parents: 11951
diff changeset
209 *
57b8a41c0e18 Truffle: fix possible node rewrite failures after recursive calls.
Andreas Woess <andreas.woess@jku.at>
parents: 11951
diff changeset
210 * This is a rather expensive operation but rare to occur.
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parents: 11951
diff changeset
211 */
57b8a41c0e18 Truffle: fix possible node rewrite failures after recursive calls.
Andreas Woess <andreas.woess@jku.at>
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diff changeset
212 private void fixupTree() {
12692
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diff changeset
213 Node rootNode = getRootNode();
12494
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parents: 11951
diff changeset
214 if (rootNode == null) {
57b8a41c0e18 Truffle: fix possible node rewrite failures after recursive calls.
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parents: 11951
diff changeset
215 throw new UnsupportedOperationException("Tree does not have a root node.");
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Andreas Woess <andreas.woess@jku.at>
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diff changeset
216 }
12495
b7c8b843dc7b Truffle: add sanity check.
Andreas Woess <andreas.woess@jku.at>
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diff changeset
217 int fixCount = rootNode.fixupChildren();
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Andreas Woess <andreas.woess@jku.at>
parents: 12494
diff changeset
218 assert fixCount != 0 : "sanity check failed: missing @Child[ren] or adoptChild?";
b7c8b843dc7b Truffle: add sanity check.
Andreas Woess <andreas.woess@jku.at>
parents: 12494
diff changeset
219 // if nothing had to be fixed, rewrite failed due to node not being a proper child.
12494
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Andreas Woess <andreas.woess@jku.at>
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diff changeset
220 }
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Andreas Woess <andreas.woess@jku.at>
parents: 11951
diff changeset
221
12495
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Andreas Woess <andreas.woess@jku.at>
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diff changeset
222 private int fixupChildren() {
b7c8b843dc7b Truffle: add sanity check.
Andreas Woess <andreas.woess@jku.at>
parents: 12494
diff changeset
223 int fixCount = 0;
12494
57b8a41c0e18 Truffle: fix possible node rewrite failures after recursive calls.
Andreas Woess <andreas.woess@jku.at>
parents: 11951
diff changeset
224 for (Node child : getChildren()) {
57b8a41c0e18 Truffle: fix possible node rewrite failures after recursive calls.
Andreas Woess <andreas.woess@jku.at>
parents: 11951
diff changeset
225 if (child != null) {
57b8a41c0e18 Truffle: fix possible node rewrite failures after recursive calls.
Andreas Woess <andreas.woess@jku.at>
parents: 11951
diff changeset
226 if (child.parent != this) {
57b8a41c0e18 Truffle: fix possible node rewrite failures after recursive calls.
Andreas Woess <andreas.woess@jku.at>
parents: 11951
diff changeset
227 child.parent = this;
12495
b7c8b843dc7b Truffle: add sanity check.
Andreas Woess <andreas.woess@jku.at>
parents: 12494
diff changeset
228 fixCount++;
12494
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Andreas Woess <andreas.woess@jku.at>
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diff changeset
229 }
12495
b7c8b843dc7b Truffle: add sanity check.
Andreas Woess <andreas.woess@jku.at>
parents: 12494
diff changeset
230 fixCount += child.fixupChildren();
12494
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Andreas Woess <andreas.woess@jku.at>
parents: 11951
diff changeset
231 }
57b8a41c0e18 Truffle: fix possible node rewrite failures after recursive calls.
Andreas Woess <andreas.woess@jku.at>
parents: 11951
diff changeset
232 }
12495
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Andreas Woess <andreas.woess@jku.at>
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diff changeset
233 return fixCount;
9255
cdf10fb20022 Remove Node.replaceChild method from the public API. Node.replace remains as the only method in the API to modify the AST.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 9254
diff changeset
234 }
cdf10fb20022 Remove Node.replaceChild method from the public API. Node.replace remains as the only method in the API to modify the AST.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 9254
diff changeset
235
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
236 /**
9256
9640bb930327 Preserve the source section during node rewrites.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 9255
diff changeset
237 * Replaces this node with another node. If there is a source section (see
9640bb930327 Preserve the source section during node rewrites.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 9255
diff changeset
238 * {@link #getSourceSection()}) associated with this node, it is transferred to the new node.
7530
5e3d1a68664e applied mx eclipseformat to all Java files
Doug Simon <doug.simon@oracle.com>
parents: 7267
diff changeset
239 *
7267
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parents:
diff changeset
240 * @param newNode the new node that is the replacement
a4b84ba6dc2e Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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parents:
diff changeset
241 * @return the new node
a4b84ba6dc2e Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
242 */
9254
4497235516df New API for representing Source objects and SourceSection objects. SourceSection objects can be associated with Truffle interpreter nodes.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 7530
diff changeset
243 public final <T extends Node> T replace(T newNode) {
7267
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parents:
diff changeset
244 return replace(newNode, "");
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parents:
diff changeset
245 }
a4b84ba6dc2e Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
246
a4b84ba6dc2e Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
247 /**
10846
e87d56a51047 Truffle: add Node.isReplaceable()
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parents: 10843
diff changeset
248 * Checks if this node is properly adopted by a parent and can be replaced.
e87d56a51047 Truffle: add Node.isReplaceable()
Andreas Woess <andreas.woess@jku.at>
parents: 10843
diff changeset
249 *
e87d56a51047 Truffle: add Node.isReplaceable()
Andreas Woess <andreas.woess@jku.at>
parents: 10843
diff changeset
250 * @return {@code true} if it is safe to replace this node.
e87d56a51047 Truffle: add Node.isReplaceable()
Andreas Woess <andreas.woess@jku.at>
parents: 10843
diff changeset
251 */
e87d56a51047 Truffle: add Node.isReplaceable()
Andreas Woess <andreas.woess@jku.at>
parents: 10843
diff changeset
252 public final boolean isReplaceable() {
e87d56a51047 Truffle: add Node.isReplaceable()
Andreas Woess <andreas.woess@jku.at>
parents: 10843
diff changeset
253 if (getParent() != null) {
e87d56a51047 Truffle: add Node.isReplaceable()
Andreas Woess <andreas.woess@jku.at>
parents: 10843
diff changeset
254 for (Node sibling : getParent().getChildren()) {
e87d56a51047 Truffle: add Node.isReplaceable()
Andreas Woess <andreas.woess@jku.at>
parents: 10843
diff changeset
255 if (sibling == this) {
e87d56a51047 Truffle: add Node.isReplaceable()
Andreas Woess <andreas.woess@jku.at>
parents: 10843
diff changeset
256 return true;
e87d56a51047 Truffle: add Node.isReplaceable()
Andreas Woess <andreas.woess@jku.at>
parents: 10843
diff changeset
257 }
e87d56a51047 Truffle: add Node.isReplaceable()
Andreas Woess <andreas.woess@jku.at>
parents: 10843
diff changeset
258 }
e87d56a51047 Truffle: add Node.isReplaceable()
Andreas Woess <andreas.woess@jku.at>
parents: 10843
diff changeset
259 }
e87d56a51047 Truffle: add Node.isReplaceable()
Andreas Woess <andreas.woess@jku.at>
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diff changeset
260 return false;
e87d56a51047 Truffle: add Node.isReplaceable()
Andreas Woess <andreas.woess@jku.at>
parents: 10843
diff changeset
261 }
e87d56a51047 Truffle: add Node.isReplaceable()
Andreas Woess <andreas.woess@jku.at>
parents: 10843
diff changeset
262
14584
6189c1983cd3 Truffle: make Node#replace accept any CharSequence as reason
Andreas Woess <andreas.woess@jku.at>
parents: 14566
diff changeset
263 private void reportReplace(Node oldNode, Node newNode, CharSequence reason) {
14073
c5411233cdf8 Truffle: Now keeps track of all not just inlined call-sites called by CallNode. Deprecated some old API in NodeUtil.
Christian Humer <christian.humer@gmail.com>
parents: 13994
diff changeset
264 RootNode rootNode = getRootNode();
c5411233cdf8 Truffle: Now keeps track of all not just inlined call-sites called by CallNode. Deprecated some old API in NodeUtil.
Christian Humer <christian.humer@gmail.com>
parents: 13994
diff changeset
265 if (rootNode != null) {
c5411233cdf8 Truffle: Now keeps track of all not just inlined call-sites called by CallNode. Deprecated some old API in NodeUtil.
Christian Humer <christian.humer@gmail.com>
parents: 13994
diff changeset
266 CallTarget target = rootNode.getCallTarget();
13983
f46cab39a9a2 Truffle: Updated inlining API. Pushed inlining implementation to the Truffle runtime.
Christian Humer <christian.humer@gmail.com>
parents: 13915
diff changeset
267 if (target instanceof ReplaceObserver) {
f46cab39a9a2 Truffle: Updated inlining API. Pushed inlining implementation to the Truffle runtime.
Christian Humer <christian.humer@gmail.com>
parents: 13915
diff changeset
268 ((ReplaceObserver) target).nodeReplaced(oldNode, newNode, reason);
12692
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Andreas Woess <andreas.woess@jku.at>
parents: 12495
diff changeset
269 }
ffd4b6b4ae68 Truffle Node class refactoring.
Andreas Woess <andreas.woess@jku.at>
parents: 12495
diff changeset
270 }
ffd4b6b4ae68 Truffle Node class refactoring.
Andreas Woess <andreas.woess@jku.at>
parents: 12495
diff changeset
271 }
ffd4b6b4ae68 Truffle Node class refactoring.
Andreas Woess <andreas.woess@jku.at>
parents: 12495
diff changeset
272
10846
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Andreas Woess <andreas.woess@jku.at>
parents: 10843
diff changeset
273 /**
9782
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Christian Humer <christian.humer@gmail.com>
parents: 9256
diff changeset
274 * Intended to be implemented by subclasses of {@link Node} to receive a notification when the
ba02d19dd3cc Added an onReplace method to Node to provide a way for a guest language implementation to use replace tracing.
Christian Humer <christian.humer@gmail.com>
parents: 9256
diff changeset
275 * node is rewritten. This method is invoked before the actual replace has happened.
ba02d19dd3cc Added an onReplace method to Node to provide a way for a guest language implementation to use replace tracing.
Christian Humer <christian.humer@gmail.com>
parents: 9256
diff changeset
276 *
ba02d19dd3cc Added an onReplace method to Node to provide a way for a guest language implementation to use replace tracing.
Christian Humer <christian.humer@gmail.com>
parents: 9256
diff changeset
277 * @param newNode the replacement node
ba02d19dd3cc Added an onReplace method to Node to provide a way for a guest language implementation to use replace tracing.
Christian Humer <christian.humer@gmail.com>
parents: 9256
diff changeset
278 * @param reason the reason the replace supplied
ba02d19dd3cc Added an onReplace method to Node to provide a way for a guest language implementation to use replace tracing.
Christian Humer <christian.humer@gmail.com>
parents: 9256
diff changeset
279 */
14584
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Andreas Woess <andreas.woess@jku.at>
parents: 14566
diff changeset
280 protected void onReplace(Node newNode, CharSequence reason) {
12692
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Andreas Woess <andreas.woess@jku.at>
parents: 12495
diff changeset
281 if (TruffleOptions.TraceRewrites) {
ffd4b6b4ae68 Truffle Node class refactoring.
Andreas Woess <andreas.woess@jku.at>
parents: 12495
diff changeset
282 traceRewrite(newNode, reason);
ffd4b6b4ae68 Truffle Node class refactoring.
Andreas Woess <andreas.woess@jku.at>
parents: 12495
diff changeset
283 }
ffd4b6b4ae68 Truffle Node class refactoring.
Andreas Woess <andreas.woess@jku.at>
parents: 12495
diff changeset
284 }
ffd4b6b4ae68 Truffle Node class refactoring.
Andreas Woess <andreas.woess@jku.at>
parents: 12495
diff changeset
285
14584
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Andreas Woess <andreas.woess@jku.at>
parents: 14566
diff changeset
286 private void traceRewrite(Node newNode, CharSequence reason) {
12692
ffd4b6b4ae68 Truffle Node class refactoring.
Andreas Woess <andreas.woess@jku.at>
parents: 12495
diff changeset
287
14564
5d1308c78ddc Truffle: Introduced NodeCost as a replacement for NodeInfo.Kind.
Christian Humer <christian.humer@gmail.com>
parents: 14073
diff changeset
288 if (TruffleOptions.TraceRewritesFilterFromCost != null) {
5d1308c78ddc Truffle: Introduced NodeCost as a replacement for NodeInfo.Kind.
Christian Humer <christian.humer@gmail.com>
parents: 14073
diff changeset
289 if (filterByKind(this, TruffleOptions.TraceRewritesFilterFromCost)) {
12692
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Andreas Woess <andreas.woess@jku.at>
parents: 12495
diff changeset
290 return;
10862
8c570011b86f Truffle: when a node is replaced, notify optimized call target and delay compilation.
Andreas Woess <andreas.woess@jku.at>
parents: 10846
diff changeset
291 }
8c570011b86f Truffle: when a node is replaced, notify optimized call target and delay compilation.
Andreas Woess <andreas.woess@jku.at>
parents: 10846
diff changeset
292 }
10590
6eb8d63cea34 Added a feature to trace rewrites of truffle nodes.
Christian Humer <christian.humer@gmail.com>
parents: 10481
diff changeset
293
14564
5d1308c78ddc Truffle: Introduced NodeCost as a replacement for NodeInfo.Kind.
Christian Humer <christian.humer@gmail.com>
parents: 14073
diff changeset
294 if (TruffleOptions.TraceRewritesFilterToCost != null) {
5d1308c78ddc Truffle: Introduced NodeCost as a replacement for NodeInfo.Kind.
Christian Humer <christian.humer@gmail.com>
parents: 14073
diff changeset
295 if (filterByKind(newNode, TruffleOptions.TraceRewritesFilterToCost)) {
10590
6eb8d63cea34 Added a feature to trace rewrites of truffle nodes.
Christian Humer <christian.humer@gmail.com>
parents: 10481
diff changeset
296 return;
6eb8d63cea34 Added a feature to trace rewrites of truffle nodes.
Christian Humer <christian.humer@gmail.com>
parents: 10481
diff changeset
297 }
12692
ffd4b6b4ae68 Truffle Node class refactoring.
Andreas Woess <andreas.woess@jku.at>
parents: 12495
diff changeset
298 }
10590
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Christian Humer <christian.humer@gmail.com>
parents: 10481
diff changeset
299
12692
ffd4b6b4ae68 Truffle Node class refactoring.
Andreas Woess <andreas.woess@jku.at>
parents: 12495
diff changeset
300 String filter = TruffleOptions.TraceRewritesFilterClass;
14564
5d1308c78ddc Truffle: Introduced NodeCost as a replacement for NodeInfo.Kind.
Christian Humer <christian.humer@gmail.com>
parents: 14073
diff changeset
301 Class<? extends Node> from = getClass();
5d1308c78ddc Truffle: Introduced NodeCost as a replacement for NodeInfo.Kind.
Christian Humer <christian.humer@gmail.com>
parents: 14073
diff changeset
302 Class<? extends Node> to = newNode.getClass();
12692
ffd4b6b4ae68 Truffle Node class refactoring.
Andreas Woess <andreas.woess@jku.at>
parents: 12495
diff changeset
303 if (filter != null && (filterByContainsClassName(from, filter) || filterByContainsClassName(to, filter))) {
ffd4b6b4ae68 Truffle Node class refactoring.
Andreas Woess <andreas.woess@jku.at>
parents: 12495
diff changeset
304 return;
10590
6eb8d63cea34 Added a feature to trace rewrites of truffle nodes.
Christian Humer <christian.humer@gmail.com>
parents: 10481
diff changeset
305 }
12692
ffd4b6b4ae68 Truffle Node class refactoring.
Andreas Woess <andreas.woess@jku.at>
parents: 12495
diff changeset
306
ffd4b6b4ae68 Truffle Node class refactoring.
Andreas Woess <andreas.woess@jku.at>
parents: 12495
diff changeset
307 PrintStream out = System.out;
14564
5d1308c78ddc Truffle: Introduced NodeCost as a replacement for NodeInfo.Kind.
Christian Humer <christian.humer@gmail.com>
parents: 14073
diff changeset
308 out.printf("[truffle] rewrite %-50s |From %-40s |To %-40s |Reason %s.%n", this.toString(), formatNodeInfo(this), formatNodeInfo(newNode), reason);
10590
6eb8d63cea34 Added a feature to trace rewrites of truffle nodes.
Christian Humer <christian.humer@gmail.com>
parents: 10481
diff changeset
309 }
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310
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311 private static String formatNodeInfo(Node node) {
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312 String cost = "?";
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313 switch (node.getCost()) {
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314 case NONE:
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315 cost = "G";
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316 break;
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317 case MONOMORPHIC:
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318 cost = "M";
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319 break;
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320 case POLYMORPHIC:
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321 cost = "P";
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322 break;
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323 case MEGAMORPHIC:
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324 cost = "G";
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325 break;
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326 default:
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327 cost = "?";
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328 break;
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329 }
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330 return cost + " " + node.getClass().getSimpleName();
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331 }
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332
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333 private static boolean filterByKind(Node node, NodeCost cost) {
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334 return node.getCost() == cost;
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335 }
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336
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337 private static boolean filterByContainsClassName(Class<? extends Node> from, String filter) {
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338 Class<?> currentFrom = from;
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339 while (currentFrom != null) {
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340 if (currentFrom.getName().contains(filter)) {
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341 return false;
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342 }
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343 currentFrom = currentFrom.getSuperclass();
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344 }
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345 return true;
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346 }
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347
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348 /**
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349 * Invokes the {@link NodeVisitor#visit(Node)} method for this node and recursively also for all
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350 * child nodes.
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351 *
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352 * @param nodeVisitor the visitor
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353 */
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354 public final void accept(NodeVisitor nodeVisitor) {
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355 if (nodeVisitor.visit(this)) {
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356 for (Node child : this.getChildren()) {
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357 if (child != null) {
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358 child.accept(nodeVisitor);
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359 }
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360 }
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361 }
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362 }
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363
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364 /**
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365 * Iterator over the children of this node.
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366 *
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367 * @return the iterator
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368 */
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369 public final Iterable<Node> getChildren() {
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370 final Node node = this;
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371 return new Iterable<Node>() {
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372
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373 public Iterator<Node> iterator() {
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374 return new NodeUtil.NodeIterator(node);
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375 }
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376 };
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377 }
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378
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379 /**
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380 * Creates a shallow copy of this node.
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381 *
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382 * @return the new copy
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383 */
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384 public Node copy() {
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385 try {
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386 return (Node) super.clone();
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387 } catch (CloneNotSupportedException e) {
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388 return null;
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389 }
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390 }
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391
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392 /**
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393 * This method must never be called. It enforces that {@link Object#clone} is not directly
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394 * called by subclasses. Use the {@link #copy()} method instead.
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395 */
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396 @Override
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397 @Deprecated
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398 protected final Object clone() throws CloneNotSupportedException {
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399 throw new IllegalStateException("This method should never be called, use the copy method instead!");
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400 }
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401
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402 /**
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403 * Get the root node of the tree a node belongs to.
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404 *
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405 * @return the {@link RootNode} or {@code null} if there is none.
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406 */
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407 public final RootNode getRootNode() {
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408 Node rootNode = this;
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409 while (rootNode.getParent() != null) {
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410 assert !(rootNode instanceof RootNode) : "root node must not have a parent";
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411 rootNode = rootNode.getParent();
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412 }
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413 if (rootNode instanceof RootNode) {
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414 return (RootNode) rootNode;
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415 }
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416 return null;
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417 }
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418
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419 /**
7267
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420 * Converts this node to a textual representation useful for debugging.
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421 */
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422 @Override
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423 public String toString() {
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424 StringBuilder sb = new StringBuilder(getClass().getSimpleName());
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425 Map<String, Object> properties = getDebugProperties();
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426 boolean hasProperties = false;
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427 for (Map.Entry<String, Object> entry : properties.entrySet()) {
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428 sb.append(hasProperties ? "," : "<");
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429 hasProperties = true;
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430 sb.append(entry.getKey()).append("=").append(entry.getValue());
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431 }
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432 if (hasProperties) {
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433 sb.append(">");
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434 }
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435 sb.append("@").append(Integer.toHexString(hashCode()));
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436 return sb.toString();
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437 }
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438 }