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annotate truffle/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/parser/SpecializationGroup.java @ 22157:dc83cc1f94f2

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Using fully qualified imports
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Wed, 16 Sep 2015 11:33:22 +0200
parents 9c8c0937da41
children
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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.
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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.truffle.dsl.processor.parser;
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24
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25 import com.oracle.truffle.dsl.processor.model.GuardExpression;
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26 import com.oracle.truffle.dsl.processor.model.NodeData;
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27 import com.oracle.truffle.dsl.processor.model.SpecializationData;
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28 import com.oracle.truffle.dsl.processor.model.TemplateMethod.TypeSignature;
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29 import java.util.ArrayList;
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30 import java.util.Collections;
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31 import java.util.Iterator;
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32 import java.util.List;
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33 import javax.lang.model.type.TypeMirror;
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34
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35 /**
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36 * Class creates groups of specializations to optimize the layout of generated executeAndSpecialize
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37 * and generic execute methods.
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38 */
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39 public final class SpecializationGroup {
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40
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41 private final List<TypeGuard> typeGuards;
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42 private final List<GuardExpression> guards;
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43
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44 private final NodeData node;
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45 private final SpecializationData specialization;
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46 private final List<SpecializationGroup> children = new ArrayList<>();
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47
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48 private SpecializationGroup parent;
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49
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50 private SpecializationGroup(SpecializationData data) {
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51 this.node = data.getNode();
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52 this.typeGuards = new ArrayList<>();
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53 this.guards = new ArrayList<>();
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54 this.specialization = data;
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55
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56 TypeSignature sig = data.getTypeSignature();
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57 for (int i = 1; i < sig.size(); i++) {
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58 typeGuards.add(new TypeGuard(sig.get(i), i - 1));
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59 }
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60 this.guards.addAll(data.getGuards());
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61 }
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62
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63 public SpecializationGroup(List<SpecializationGroup> children, List<TypeGuard> typeGuardsMatches, List<GuardExpression> guardMatches) {
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64 assert !children.isEmpty() : "children must not be empty";
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65 this.typeGuards = typeGuardsMatches;
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66 this.guards = guardMatches;
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67 this.node = children.get(0).node;
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68 this.specialization = null;
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69 updateChildren(children);
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70 }
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71
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72 public List<TypeGuard> getAllGuards() {
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73 List<TypeGuard> collectedGuards = new ArrayList<>();
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74 collectedGuards.addAll(typeGuards);
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75 if (parent != null) {
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76 collectedGuards.addAll(parent.getAllGuards());
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77 }
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78 return collectedGuards;
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79 }
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80
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81 public List<GuardExpression> findElseConnectableGuards() {
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82 if (!getTypeGuards().isEmpty()) {
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83 return Collections.emptyList();
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84 }
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85
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86 if (getGuards().isEmpty()) {
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87 return Collections.emptyList();
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88 }
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89
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90 List<GuardExpression> elseConnectableGuards = new ArrayList<>();
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91 int guardIndex = 0;
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92 while (guardIndex < getGuards().size() && findNegatedGuardInPrevious(getGuards().get(guardIndex)) != null) {
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93 elseConnectableGuards.add(getGuards().get(guardIndex));
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94 guardIndex++;
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95 }
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96
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97 return elseConnectableGuards;
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98 }
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99
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100 private GuardExpression findNegatedGuardInPrevious(GuardExpression guard) {
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101 SpecializationGroup previous = this.getPreviousGroup();
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102 if (previous == null) {
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103 return null;
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104 }
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105 List<GuardExpression> elseConnectedGuards = previous.findElseConnectableGuards();
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106
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107 if (previous == null || previous.getGuards().size() != elseConnectedGuards.size() + 1) {
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108 return null;
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109 }
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110
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111 /* Guard is else branch can be connected in previous specialization. */
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112 if (elseConnectedGuards.contains(guard)) {
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113 return guard;
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114 }
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115
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116 GuardExpression previousGuard = previous.getGuards().get(elseConnectedGuards.size());
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117 if (guard.equalsNegated(previousGuard)) {
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118 return guard;
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119 }
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120 return null;
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121 }
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122
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123 private void updateChildren(List<SpecializationGroup> childs) {
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124 if (!children.isEmpty()) {
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125 children.clear();
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126 }
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127 this.children.addAll(childs);
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128 for (SpecializationGroup child : childs) {
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129 child.parent = this;
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130 }
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131 }
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132
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133 public SpecializationGroup getParent() {
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134 return parent;
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135 }
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136
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137 public List<TypeGuard> getTypeGuards() {
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138 return typeGuards;
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139 }
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140
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141 public List<GuardExpression> getGuards() {
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142 return guards;
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143 }
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144
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145 public List<SpecializationGroup> getChildren() {
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146 return children;
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147 }
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148
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149 public SpecializationData getSpecialization() {
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150 return specialization;
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151 }
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152
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153 private static SpecializationGroup combine(List<SpecializationGroup> groups) {
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154 if (groups.isEmpty()) {
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155 throw new IllegalArgumentException("empty combinations");
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156 }
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157 if (groups.size() == 1) {
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158 return null;
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159 }
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160
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161 List<TypeGuard> typeGuardsMatches = new ArrayList<>();
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162 List<GuardExpression> guardMatches = new ArrayList<>();
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163
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164 SpecializationGroup first = groups.get(0);
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165 List<SpecializationGroup> others = groups.subList(1, groups.size());
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166
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167 outer: for (TypeGuard typeGuard : first.typeGuards) {
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168 for (SpecializationGroup other : others) {
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169 if (!other.typeGuards.contains(typeGuard)) {
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170 // type guards can be combined unordered
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171 continue outer;
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172 }
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173 }
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174 typeGuardsMatches.add(typeGuard);
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175 }
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176
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177 outer: for (GuardExpression guard : first.guards) {
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178 for (SpecializationGroup other : others) {
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179 if (!other.guards.contains(guard)) {
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180 // we must break here. One guard may depend on the other.
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181 break outer;
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182 }
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183 }
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184 guardMatches.add(guard);
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185 }
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186
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187 // check for guards for required type casts
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188 for (Iterator<GuardExpression> iterator = guardMatches.iterator(); iterator.hasNext();) {
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189 GuardExpression guardMatch = iterator.next();
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190 if (!guardMatch.getExpression().findBoundVariables().isEmpty()) {
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191 iterator.remove();
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192 }
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193 // TODO we need to be smarter here with bound parameters.
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194 }
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195
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196 if (typeGuardsMatches.isEmpty() && guardMatches.isEmpty()) {
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197 return null;
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198 }
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199
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200 for (SpecializationGroup group : groups) {
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diff changeset
201 group.typeGuards.removeAll(typeGuardsMatches);
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202 group.guards.removeAll(guardMatches);
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203 }
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204
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205 List<SpecializationGroup> newChildren = new ArrayList<>(groups);
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206 return new SpecializationGroup(newChildren, typeGuardsMatches, guardMatches);
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207 }
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208
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diff changeset
209 public static SpecializationGroup create(SpecializationData specialization) {
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210 return new SpecializationGroup(specialization);
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diff changeset
211 }
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diff changeset
212
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213 public static SpecializationGroup create(List<SpecializationData> specializations) {
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214 List<SpecializationGroup> groups = new ArrayList<>();
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215 for (SpecializationData specialization : specializations) {
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diff changeset
216 groups.add(new SpecializationGroup(specialization));
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217 }
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218 return new SpecializationGroup(createCombinationalGroups(groups), Collections.<TypeGuard> emptyList(), Collections.<GuardExpression> emptyList());
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219 }
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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220
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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221 @Override
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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222 public String toString() {
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diff changeset
223 return "SpecializationGroup [typeGuards=" + typeGuards + ", guards=" + guards + "]";
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224 }
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225
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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diff changeset
226 private static List<SpecializationGroup> createCombinationalGroups(List<SpecializationGroup> groups) {
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diff changeset
227 if (groups.size() <= 1) {
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diff changeset
228 return groups;
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229 }
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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diff changeset
230 List<SpecializationGroup> newGroups = new ArrayList<>();
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231
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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diff changeset
232 int i = 0;
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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diff changeset
233 for (i = 0; i < groups.size();) {
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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diff changeset
234 SpecializationGroup combined = null;
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
diff changeset
235 for (int j = groups.size(); j > i + 1; j--) {
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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diff changeset
236 combined = combine(groups.subList(i, j));
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
diff changeset
237 if (combined != null) {
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
diff changeset
238 break;
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
diff changeset
239 }
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
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240 }
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Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
241 SpecializationGroup newGroup;
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diff changeset
242 if (combined == null) {
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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diff changeset
243 newGroup = groups.get(i);
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
diff changeset
244 i++;
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
diff changeset
245 } else {
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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diff changeset
246 newGroup = combined;
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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diff changeset
247 List<SpecializationGroup> originalGroups = new ArrayList<>(combined.children);
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diff changeset
248 combined.updateChildren(createCombinationalGroups(originalGroups));
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diff changeset
249 i += originalGroups.size();
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
diff changeset
250 }
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
diff changeset
251
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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diff changeset
252 newGroups.add(newGroup);
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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253
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
diff changeset
254 }
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
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255
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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diff changeset
256 return newGroups;
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parents:
diff changeset
257 }
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
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258
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
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259 public SpecializationGroup getPreviousGroup() {
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260 if (parent == null || parent.children.isEmpty()) {
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261 return null;
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262 }
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263 int index = parent.children.indexOf(this);
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264 if (index <= 0) {
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265 return null;
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266 }
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267 return parent.children.get(index - 1);
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268 }
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269
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270 public int getUncheckedSpecializationIndex() {
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271 int groupMaxIndex = getMaxSpecializationIndex();
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272
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273 int genericIndex = node.getSpecializations().indexOf(node.getGenericSpecialization());
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274 if (groupMaxIndex >= genericIndex) {
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275 // no minimum state check for an generic index
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276 groupMaxIndex = -1;
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277 }
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278
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279 if (groupMaxIndex > -1) {
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280 // no minimum state check if already checked by parent group
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281 int parentMaxIndex = -1;
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282 if (getParent() != null) {
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283 parentMaxIndex = getParent().getMaxSpecializationIndex();
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284 }
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285 if (groupMaxIndex == parentMaxIndex) {
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286 groupMaxIndex = -1;
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287 }
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288 }
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289 return groupMaxIndex;
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290 }
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291
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292 public int getMaxSpecializationIndex() {
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293 if (specialization != null) {
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294 return specialization.getNode().getSpecializations().indexOf(specialization);
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295 } else {
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296 int max = Integer.MIN_VALUE;
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297 for (SpecializationGroup childGroup : getChildren()) {
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298 max = Math.max(max, childGroup.getMaxSpecializationIndex());
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299 }
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300 return max;
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301 }
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302 }
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303
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304 public static final class TypeGuard {
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305
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306 private final int signatureIndex;
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307 private final TypeMirror type;
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308
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309 public TypeGuard(TypeMirror type, int signatureIndex) {
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310 this.type = type;
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311 this.signatureIndex = signatureIndex;
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312 }
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313
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314 @Override
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315 public int hashCode() {
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316 final int prime = 31;
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317 int result = 1;
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318 result = prime * result + signatureIndex;
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319 result = prime * result + type.hashCode();
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320 return result;
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321 }
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322
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323 @Override
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324 public boolean equals(Object obj) {
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325 if (this == obj) {
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326 return true;
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327 } else if (obj == null) {
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328 return false;
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329 } else if (getClass() != obj.getClass()) {
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330 return false;
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331 }
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332
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333 TypeGuard other = (TypeGuard) obj;
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334 if (signatureIndex != other.signatureIndex) {
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335 return false;
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336 } else if (!type.equals(other.type)) {
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337 return false;
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diff changeset
338 }
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339 return true;
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diff changeset
340 }
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341
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342 public int getSignatureIndex() {
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343 return signatureIndex;
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344 }
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diff changeset
345
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346 public TypeMirror getType() {
11201
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diff changeset
347 return type;
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diff changeset
348 }
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diff changeset
349 }
16755
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parents: 13527
diff changeset
350
19289
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
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diff changeset
351 public SpecializationGroup getPrevious() {
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diff changeset
352 if (getParent() == null) {
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diff changeset
353 return null;
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diff changeset
354 }
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
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diff changeset
355
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
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parents: 19283
diff changeset
356 List<SpecializationGroup> parentChildren = getParent().getChildren();
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
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diff changeset
357 int index = parentChildren.indexOf(this);
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diff changeset
358 if (index <= 0) {
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diff changeset
359 return null;
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
Christian Humer <christian.humer@gmail.com>
parents: 19283
diff changeset
360 }
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
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parents: 19283
diff changeset
361 return parentChildren.get(index - 1);
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
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parents: 19283
diff changeset
362 }
11195
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parents:
diff changeset
363 }