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annotate graal/com.oracle.truffle.api.dsl/src/com/oracle/truffle/api/dsl/internal/DSLShare.java @ 18163:c88ab4f1f04a

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re-enabled Checkstyle with the release of 6.0 that supports Java 8; fixed existing Checkstyle warnings
author Doug Simon <doug.simon@oracle.com>
date Fri, 24 Oct 2014 16:18:10 +0200
parents 1680a4ddc2a7
children a720bf2e2f43
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1 /*
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2 * Copyright (c) 2012, 2012, 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.dsl.internal;
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26
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27 import java.util.*;
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28 import java.util.concurrent.*;
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29
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30 import com.oracle.truffle.api.nodes.*;
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31
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32 /** Contains utility classes shared across generated DSLNode implementations. */
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33 public class DSLShare {
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34
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35 public static boolean isExcluded(Node currentNode, DSLMetadata otherMetadata) {
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36 assert otherMetadata.getExcludedBy().length > 0 : "At least one exclude must be defined for isIncluded.";
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37 Node cur = findRoot(currentNode);
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38 while (cur != null) {
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39 Class<?> curClass = cur.getClass();
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40 if (curClass == otherMetadata.getSpecializationClass()) {
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41 return true;
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42 } else if (containsClass(otherMetadata.getExcludedBy(), cur)) {
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43 return true;
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44 }
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45 cur = getNext(cur);
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46 }
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47 return false;
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48 }
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49
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50 private static boolean includes(Node oldNode, DSLNode newNode) {
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51 return containsClass(newNode.getMetadata0().getIncludes(), oldNode);
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52 }
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53
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54 public static <T extends Node & DSLNode> T rewrite(final Node thisNode, final T newNode, final String message) {
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55 return thisNode.atomic(new Callable<T>() {
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56 public T call() {
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57 assert newNode != null;
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58 if (getNext(thisNode) != null || getPrevious(thisNode) != null) {
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59 // already polymorphic -> append
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60 return appendPolymorphic(findUninitialized(thisNode), newNode);
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61 } else if (includes(thisNode, newNode)) {
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62 // included -> remains monomorphic
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63 newNode.adoptChildren0(thisNode, null);
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64 return thisNode.replace(newNode, message);
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65 } else {
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66 // goto polymorphic
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67 return null;
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68 }
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69 }
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70 });
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71 }
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72
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73 @SuppressWarnings("unchecked")
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74 public static <T extends Node> T findRoot(T node) {
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75 Node prev = node;
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76 Node cur;
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77 do {
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78 cur = prev;
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79 prev = getPrevious(cur);
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80 } while (prev != null);
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81 return (T) cur;
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82 }
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83
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84 private static Node findUninitialized(Node node) {
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85 Node next = node;
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86 Node cur;
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87 do {
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88 cur = next;
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89 next = getNext(cur);
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90 } while (next != null);
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91 return cur;
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92 }
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93
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94 public static <T extends Node & DSLNode> T rewriteUninitialized(final Node uninitialized, final T newNode) {
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95 return uninitialized.atomic(new Callable<T>() {
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96 public T call() {
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97 Node prev = getPrevious(uninitialized);
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98 if (prev == null) {
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99 newNode.adoptChildren0(uninitialized, null);
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100 return uninitialized.replace(newNode, "Uninitialized monomorphic");
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101 } else {
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102 return appendPolymorphic(uninitialized, newNode);
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103 }
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104 }
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105 });
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106
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107 }
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108
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109 public static <T extends Node & DSLNode> T rewriteToPolymorphic(final Node oldNode, final DSLNode uninitializedDSL, final T polymorphic, final DSLNode currentCopy, final DSLNode newNodeDSL,
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110 final String message) {
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111 return oldNode.atomic(new Callable<T>() {
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112 public T call() {
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113 assert getNext(oldNode) == null;
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114 assert getPrevious(oldNode) == null;
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115 assert newNodeDSL != null;
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116
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117 Node uninitialized = (Node) uninitializedDSL;
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118 Node newNode = (Node) newNodeDSL;
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119 polymorphic.adoptChildren0(oldNode, (Node) currentCopy);
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120
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121 updateSourceSection(oldNode, uninitialized);
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122 // new specialization
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123 updateSourceSection(oldNode, newNode);
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124 newNodeDSL.adoptChildren0(null, uninitialized);
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125 currentCopy.adoptChildren0(null, newNode);
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126
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127 oldNode.replace(polymorphic, message);
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128
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129 assert polymorphic.getNext0() == currentCopy;
1680a4ddc2a7 Truffle-DSL: added thread-safety for DSL rewrites.
Christian Humer <christian.humer@gmail.com>
parents: 16922
diff changeset
130 assert newNode != null ? currentCopy.getNext0() == newNode : currentCopy.getNext0() == uninitialized;
1680a4ddc2a7 Truffle-DSL: added thread-safety for DSL rewrites.
Christian Humer <christian.humer@gmail.com>
parents: 16922
diff changeset
131 assert uninitializedDSL.getNext0() == null;
1680a4ddc2a7 Truffle-DSL: added thread-safety for DSL rewrites.
Christian Humer <christian.humer@gmail.com>
parents: 16922
diff changeset
132 return polymorphic;
1680a4ddc2a7 Truffle-DSL: added thread-safety for DSL rewrites.
Christian Humer <christian.humer@gmail.com>
parents: 16922
diff changeset
133 }
1680a4ddc2a7 Truffle-DSL: added thread-safety for DSL rewrites.
Christian Humer <christian.humer@gmail.com>
parents: 16922
diff changeset
134 });
16763
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
135 }
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
136
16921
f5541b01f374 Truffle-DSL: fixed lost source sections for polymorphic specializations. (GRAAL-851 #resolve)
Christian Humer <christian.humer@gmail.com>
parents: 16766
diff changeset
137 private static void updateSourceSection(Node oldNode, Node newNode) {
f5541b01f374 Truffle-DSL: fixed lost source sections for polymorphic specializations. (GRAAL-851 #resolve)
Christian Humer <christian.humer@gmail.com>
parents: 16766
diff changeset
138 if (newNode.getSourceSection() == null) {
f5541b01f374 Truffle-DSL: fixed lost source sections for polymorphic specializations. (GRAAL-851 #resolve)
Christian Humer <christian.humer@gmail.com>
parents: 16766
diff changeset
139 newNode.assignSourceSection(oldNode.getSourceSection());
f5541b01f374 Truffle-DSL: fixed lost source sections for polymorphic specializations. (GRAAL-851 #resolve)
Christian Humer <christian.humer@gmail.com>
parents: 16766
diff changeset
140 }
f5541b01f374 Truffle-DSL: fixed lost source sections for polymorphic specializations. (GRAAL-851 #resolve)
Christian Humer <christian.humer@gmail.com>
parents: 16766
diff changeset
141 }
f5541b01f374 Truffle-DSL: fixed lost source sections for polymorphic specializations. (GRAAL-851 #resolve)
Christian Humer <christian.humer@gmail.com>
parents: 16766
diff changeset
142
16763
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
143 private static Class<?>[] mergeTypes(DSLNode node, Class<?>[] types) {
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
144 Class<?>[] specializedTypes = node.getMetadata0().getSpecializedTypes();
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Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
145 if (specializedTypes.length == 0) {
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
146 return null;
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Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
147 } else if (types == null) {
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
148 return Arrays.copyOf(specializedTypes, specializedTypes.length);
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
149 } else {
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Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
150 for (int i = 0; i < specializedTypes.length; i++) {
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
151 if (specializedTypes[i] != types[i]) {
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
152 types[i] = Object.class;
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Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
153 }
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Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
154 }
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Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
155 return types;
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Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
156 }
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Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
157 }
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Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
158
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
159 private static <T extends Node & DSLNode> T appendPolymorphic(Node uninitialized, T newNode) {
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
160 Class<?>[] includes = newNode.getMetadata0().getIncludes();
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
161 Node cur = getPrevious(uninitialized);
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Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
162 Node prev = uninitialized;
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
163 int depth = 0;
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
164 Class<?>[] types = null;
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
165 while (cur != null) {
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
166 if (containsClass(includes, cur)) {
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
167 cur.replace(prev, "Included in other specialization");
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
168 cur = prev;
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
169 } else {
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Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
170 depth++;
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
171 types = mergeTypes((DSLNode) cur, types);
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
172 }
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
173 prev = cur;
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
174 cur = getPrevious(cur);
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
175 }
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
176 assert prev.getCost() == NodeCost.POLYMORPHIC;
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
177
16921
f5541b01f374 Truffle-DSL: fixed lost source sections for polymorphic specializations. (GRAAL-851 #resolve)
Christian Humer <christian.humer@gmail.com>
parents: 16766
diff changeset
178 updateSourceSection(prev, newNode);
16922
0ea0c4133b78 Truffle-DSL: fixed polymorphic to monomorphic transition. It remained polymorphic in some cases.
Christian Humer <christian.humer@gmail.com>
parents: 16921
diff changeset
179 if (depth <= 1) {
16763
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Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
180 newNode.adoptChildren0(prev, null);
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
181 return prev.replace(newNode, "Polymorphic to monomorphic.");
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
182 } else {
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
183 newNode.adoptChildren0(null, uninitialized);
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
184 ((DSLNode) prev).updateTypes0(mergeTypes(newNode, types));
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
185 return uninitialized.replace(newNode, "Appended polymorphic");
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
186 }
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
187 }
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
188
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
189 private static boolean containsClass(Class<?>[] classList, Node node) {
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
190 Class<?> nodeClass = node.getClass();
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
191 for (Class<?> toCheck : classList) {
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
192 if (nodeClass == toCheck) {
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
193 if (node.getCost() == NodeCost.UNINITIALIZED) {
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
194 /*
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
195 * In case a specialization is excluded by the fallback specialization the
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
196 * uninitialized class is used as exclusion class. Because the fallback field in
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
197 * the uninitialized specialization is not accessible we use the costs to check
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
198 * if the fallback was reached or not. In case the fallback was reached in the
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
199 * uninitialized version the cost is MONOMORPHIC, otherwise it is UNINITIALIZED.
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
200 */
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
201 continue;
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
202 }
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
203 return true;
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
204 }
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
205 }
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
206 return false;
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
207 }
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
208
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
209 private static Node getNext(Node node) {
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
210 return ((DSLNode) node).getNext0();
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
211 }
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
212
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
213 private static Node getPrevious(Node node) {
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
214 Node parent = node.getParent();
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
215 if (parent instanceof DSLNode && getNext(parent) == node) {
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
216 return parent;
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
217 } else {
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
218 return null;
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
219 }
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
220 }
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16751
diff changeset
221
18163
c88ab4f1f04a re-enabled Checkstyle with the release of 6.0 that supports Java 8; fixed existing Checkstyle warnings
Doug Simon <doug.simon@oracle.com>
parents: 17252
diff changeset
222 }