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annotate graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/parser/SpecializationGroup.java @ 19291:f4792a544170

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Truffle-DSL: implement new assumptions semantics.
author Christian Humer <christian.humer@gmail.com>
date Wed, 11 Feb 2015 12:13:44 +0100
parents 62c43fcf5be2
children 18c0f02fa4d2
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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 java.util.*;
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26
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27 import com.oracle.truffle.dsl.processor.model.*;
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28 import com.oracle.truffle.dsl.processor.model.TemplateMethod.TypeSignature;
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29
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30 /**
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31 * Class creates groups of specializations to optimize the layout of generated executeAndSpecialize
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32 * and generic execute methods.
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33 */
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34 public final class SpecializationGroup {
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35
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36 private final List<TypeGuard> typeGuards;
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37 private final List<GuardExpression> guards;
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38
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39 private final NodeData node;
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40 private final SpecializationData specialization;
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41 private final List<SpecializationGroup> children = new ArrayList<>();
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42
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43 private SpecializationGroup parent;
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44
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45 private SpecializationGroup(SpecializationData data) {
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46 this.node = data.getNode();
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47 this.typeGuards = new ArrayList<>();
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48 this.guards = new ArrayList<>();
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49 this.specialization = data;
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50
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51 TypeSignature sig = data.getTypeSignature();
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52 for (int i = 1; i < sig.size(); i++) {
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53 typeGuards.add(new TypeGuard(sig.get(i), i - 1));
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54 }
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55 this.guards.addAll(data.getGuards());
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56 }
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57
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58 public SpecializationGroup(List<SpecializationGroup> children, List<TypeGuard> typeGuardsMatches, List<GuardExpression> guardMatches) {
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59 assert !children.isEmpty() : "children must not be empty";
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60 this.typeGuards = typeGuardsMatches;
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61 this.guards = guardMatches;
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62 this.node = children.get(0).node;
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63 this.specialization = null;
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64 updateChildren(children);
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65 }
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66
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67 public List<TypeGuard> getAllGuards() {
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68 List<TypeGuard> collectedGuards = new ArrayList<>();
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69 collectedGuards.addAll(typeGuards);
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70 if (parent != null) {
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71 collectedGuards.addAll(parent.getAllGuards());
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72 }
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73 return collectedGuards;
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74 }
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75
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76 public List<GuardExpression> findElseConnectableGuards() {
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77 if (!getTypeGuards().isEmpty()) {
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78 return Collections.emptyList();
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79 }
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80
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81 if (getGuards().isEmpty()) {
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82 return Collections.emptyList();
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83 }
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84
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85 List<GuardExpression> elseConnectableGuards = new ArrayList<>();
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86 int guardIndex = 0;
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87 while (guardIndex < getGuards().size() && findNegatedGuardInPrevious(getGuards().get(guardIndex)) != null) {
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88 elseConnectableGuards.add(getGuards().get(guardIndex));
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89 guardIndex++;
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90 }
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91
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92 return elseConnectableGuards;
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93 }
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94
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95 private GuardExpression findNegatedGuardInPrevious(GuardExpression guard) {
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96 SpecializationGroup previous = this.getPreviousGroup();
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97 if (previous == null) {
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98 return null;
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99 }
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100 List<GuardExpression> elseConnectedGuards = previous.findElseConnectableGuards();
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101
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102 if (previous == null || previous.getGuards().size() != elseConnectedGuards.size() + 1) {
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103 return null;
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104 }
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105
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106 /* Guard is else branch can be connected in previous specialization. */
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107 if (elseConnectedGuards.contains(guard)) {
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108 return guard;
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109 }
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110
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111 GuardExpression previousGuard = previous.getGuards().get(elseConnectedGuards.size());
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112 if (guard.equalsNegated(previousGuard)) {
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113 return guard;
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114 }
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115 return null;
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116 }
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117
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118 private void updateChildren(List<SpecializationGroup> childs) {
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119 if (!children.isEmpty()) {
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120 children.clear();
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121 }
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122 this.children.addAll(childs);
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123 for (SpecializationGroup child : childs) {
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124 child.parent = this;
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125 }
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126 }
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127
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128 public SpecializationGroup getParent() {
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129 return parent;
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130 }
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131
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132 public List<TypeGuard> getTypeGuards() {
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133 return typeGuards;
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134 }
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135
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136 public List<GuardExpression> getGuards() {
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137 return guards;
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138 }
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139
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140 public List<SpecializationGroup> getChildren() {
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141 return children;
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142 }
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143
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144 public SpecializationData getSpecialization() {
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145 return specialization;
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146 }
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147
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148 private static SpecializationGroup combine(List<SpecializationGroup> groups) {
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149 if (groups.isEmpty()) {
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150 throw new IllegalArgumentException("empty combinations");
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151 }
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152 if (groups.size() == 1) {
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153 return null;
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154 }
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155
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156 List<TypeGuard> typeGuardsMatches = new ArrayList<>();
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157 List<GuardExpression> guardMatches = new ArrayList<>();
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158
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159 SpecializationGroup first = groups.get(0);
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160 List<SpecializationGroup> others = groups.subList(1, groups.size());
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161
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162 outer: for (TypeGuard typeGuard : first.typeGuards) {
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163 for (SpecializationGroup other : others) {
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164 if (!other.typeGuards.contains(typeGuard)) {
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165 // type guards can be combined unordered
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166 continue outer;
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167 }
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168 }
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169 typeGuardsMatches.add(typeGuard);
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170 }
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171
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172 outer: for (GuardExpression guard : first.guards) {
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173 for (SpecializationGroup other : others) {
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174 if (!other.guards.contains(guard)) {
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175 // we must break here. One guard may depend on the other.
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176 break outer;
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177 }
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178 }
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179 guardMatches.add(guard);
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180 }
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181
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182 // check for guards for required type casts
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183 for (Iterator<GuardExpression> iterator = guardMatches.iterator(); iterator.hasNext();) {
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184 GuardExpression guardMatch = iterator.next();
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185 if (!guardMatch.getExpression().findBoundVariables().isEmpty()) {
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186 iterator.remove();
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187 }
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188 // TODO we need to be smarter here with bound parameters.
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189 }
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190
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191 if (typeGuardsMatches.isEmpty() && guardMatches.isEmpty()) {
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192 return null;
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193 }
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194
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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195 for (SpecializationGroup group : groups) {
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196 group.typeGuards.removeAll(typeGuardsMatches);
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197 group.guards.removeAll(guardMatches);
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198 }
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199
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200 List<SpecializationGroup> newChildren = new ArrayList<>(groups);
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201 return new SpecializationGroup(newChildren, typeGuardsMatches, guardMatches);
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202 }
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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203
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diff changeset
204 public static SpecializationGroup create(SpecializationData specialization) {
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205 return new SpecializationGroup(specialization);
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parents: 11442
diff changeset
206 }
b33783cbd8ce Truffle-DSL: refactored redundant guard generation code.
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diff changeset
207
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208 public static SpecializationGroup create(List<SpecializationData> specializations) {
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209 List<SpecializationGroup> groups = new ArrayList<>();
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diff changeset
210 for (SpecializationData specialization : specializations) {
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diff changeset
211 groups.add(new SpecializationGroup(specialization));
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diff changeset
212 }
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diff changeset
213 return new SpecializationGroup(createCombinationalGroups(groups), Collections.<TypeGuard> emptyList(), Collections.<GuardExpression> emptyList());
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214 }
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
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215
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
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216 @Override
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
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217 public String toString() {
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diff changeset
218 return "SpecializationGroup [typeGuards=" + typeGuards + ", guards=" + guards + "]";
11195
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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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parents:
diff changeset
221 private static List<SpecializationGroup> createCombinationalGroups(List<SpecializationGroup> groups) {
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
diff changeset
222 if (groups.size() <= 1) {
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
diff changeset
223 return groups;
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
diff changeset
224 }
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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diff changeset
225 List<SpecializationGroup> newGroups = new ArrayList<>();
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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diff changeset
226
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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diff changeset
227 int i = 0;
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
diff changeset
228 for (i = 0; i < groups.size();) {
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diff changeset
229 SpecializationGroup combined = null;
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
diff changeset
230 for (int j = groups.size(); j > i + 1; j--) {
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
diff changeset
231 combined = combine(groups.subList(i, j));
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
diff changeset
232 if (combined != null) {
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
233 break;
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
diff changeset
234 }
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
diff changeset
235 }
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
236 SpecializationGroup newGroup;
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.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
238 newGroup = groups.get(i);
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
239 i++;
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
240 } else {
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
diff changeset
241 newGroup = combined;
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
diff changeset
242 List<SpecializationGroup> originalGroups = new ArrayList<>(combined.children);
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
diff changeset
243 combined.updateChildren(createCombinationalGroups(originalGroups));
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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diff changeset
244 i += originalGroups.size();
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
245 }
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
246
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
247 newGroups.add(newGroup);
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
diff changeset
248
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
diff changeset
249 }
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.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
251 return newGroups;
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
diff changeset
252 }
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
diff changeset
253
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
254 public SpecializationGroup getPreviousGroup() {
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parents:
diff changeset
255 if (parent == null || parent.children.isEmpty()) {
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
diff changeset
256 return null;
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
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parents:
diff changeset
257 }
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
258 int index = parent.children.indexOf(this);
4f52b08bd2f9 Truffle-DSL: Implemented specialization grouping for generic cases.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
259 if (index <= 0) {
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260 return null;
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261 }
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262 return parent.children.get(index - 1);
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263 }
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264
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265 public int getUncheckedSpecializationIndex() {
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266 int groupMaxIndex = getMaxSpecializationIndex();
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267
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268 int genericIndex = node.getSpecializations().indexOf(node.getGenericSpecialization());
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269 if (groupMaxIndex >= genericIndex) {
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270 // no minimum state check for an generic index
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271 groupMaxIndex = -1;
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272 }
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273
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274 if (groupMaxIndex > -1) {
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275 // no minimum state check if already checked by parent group
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276 int parentMaxIndex = -1;
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277 if (getParent() != null) {
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278 parentMaxIndex = getParent().getMaxSpecializationIndex();
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279 }
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280 if (groupMaxIndex == parentMaxIndex) {
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281 groupMaxIndex = -1;
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282 }
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283 }
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284 return groupMaxIndex;
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285 }
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286
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287 public int getMaxSpecializationIndex() {
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288 if (specialization != null) {
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289 return specialization.getNode().getSpecializations().indexOf(specialization);
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290 } else {
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291 int max = Integer.MIN_VALUE;
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292 for (SpecializationGroup childGroup : getChildren()) {
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293 max = Math.max(max, childGroup.getMaxSpecializationIndex());
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294 }
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295 return max;
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296 }
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297 }
11201
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298
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299 public static final class TypeGuard {
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300
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301 private final int signatureIndex;
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302 private final TypeData type;
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303
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304 public TypeGuard(TypeData type, int signatureIndex) {
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305 this.type = type;
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306 this.signatureIndex = signatureIndex;
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307 }
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308
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309 @Override
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310 public int hashCode() {
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311 final int prime = 31;
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312 int result = 1;
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313 result = prime * result + signatureIndex;
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314 result = prime * result + type.hashCode();
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315 return result;
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316 }
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317
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318 @Override
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319 public boolean equals(Object obj) {
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320 if (this == obj) {
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321 return true;
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322 } else if (obj == null) {
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323 return false;
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324 } else if (getClass() != obj.getClass()) {
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325 return false;
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326 }
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327
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328 TypeGuard other = (TypeGuard) obj;
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329 if (signatureIndex != other.signatureIndex) {
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330 return false;
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331 } else if (!type.equals(other.type)) {
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332 return false;
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333 }
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334 return true;
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335 }
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336
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337 public int getSignatureIndex() {
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338 return signatureIndex;
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339 }
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340
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341 public TypeData getType() {
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342 return type;
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343 }
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344 }
16755
bd28da642eea Truffle-DSL: Several new features implemented:
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parents: 13527
diff changeset
345
19289
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diff changeset
346 public SpecializationGroup getPrevious() {
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diff changeset
347 if (getParent() == null) {
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diff changeset
348 return null;
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diff changeset
349 }
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diff changeset
350
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
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diff changeset
351 List<SpecializationGroup> parentChildren = getParent().getChildren();
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diff changeset
352 int index = parentChildren.indexOf(this);
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diff changeset
353 if (index <= 0) {
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diff changeset
354 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
355 }
62c43fcf5be2 Truffle-DSL: implement @Cached and fixes for the new guard expression syntax.
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parents: 19283
diff changeset
356 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
357 }
11195
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parents:
diff changeset
358 }