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annotate graal/com.oracle.graal.virtual/src/com/oracle/graal/virtual/phases/ea/VirtualizerToolImpl.java @ 9942:de3653e68738

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proper assertions in VirtualizerToolImpl.setVirtualEntry
author Lukas Stadler <lukas.stadler@jku.at>
date Fri, 07 Jun 2013 13:44:00 +0200
parents 063a712fe8d8
children eef9281ec13b
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1 /*
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2 * Copyright (c) 2011, 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.graal.virtual.phases.ea;
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24
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25 import static com.oracle.graal.phases.GraalOptions.*;
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26
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27 import com.oracle.graal.api.code.*;
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28 import com.oracle.graal.api.meta.*;
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29 import com.oracle.graal.graph.*;
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30 import com.oracle.graal.nodes.*;
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31 import com.oracle.graal.nodes.calc.*;
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32 import com.oracle.graal.nodes.spi.Virtualizable.EscapeState;
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33 import com.oracle.graal.nodes.spi.Virtualizable.State;
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34 import com.oracle.graal.nodes.spi.*;
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35 import com.oracle.graal.nodes.virtual.*;
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36
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37 class VirtualizerToolImpl implements VirtualizerTool {
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38
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39 private final NodeBitMap usages;
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40 private final MetaAccessProvider metaAccess;
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41 private final Assumptions assumptions;
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42 private GraphEffectList effects;
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43
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44 VirtualizerToolImpl(NodeBitMap usages, MetaAccessProvider metaAccess, Assumptions assumptions) {
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45 this.usages = usages;
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46 this.metaAccess = metaAccess;
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47 this.assumptions = assumptions;
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48 }
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49
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50 private boolean deleted;
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51 private BlockState state;
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52 private ValueNode current;
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53 private FixedNode position;
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54
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55 @Override
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56 public MetaAccessProvider getMetaAccessProvider() {
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57 return metaAccess;
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58 }
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59
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60 @Override
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61 public Assumptions getAssumptions() {
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62 return assumptions;
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63 }
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64
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65 public void setEffects(GraphEffectList effects) {
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66 this.effects = effects;
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67 }
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68
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69 public void reset(BlockState newState, ValueNode newCurrent, FixedNode newPosition) {
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70 deleted = false;
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71 state = newState;
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72 current = newCurrent;
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73 position = newPosition;
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74 }
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75
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76 public boolean isDeleted() {
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77 return deleted;
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78 }
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79
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80 @Override
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81 public State getObjectState(ValueNode value) {
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82 return state.getObjectState(value);
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83 }
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84
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85 @Override
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86 public void setVirtualEntry(State objectState, int index, ValueNode value) {
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87 ObjectState obj = (ObjectState) objectState;
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88 assert obj != null && obj.isVirtual() : "not virtual: " + obj;
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89 ObjectState valueState = state.getObjectState(value);
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90 ValueNode newValue = value;
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91 if (valueState == null) {
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92 newValue = getReplacedValue(value);
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93 assert obj.getEntry(index) == null || obj.getEntry(index).kind() == newValue.kind() || (isObjectEntry(obj.getEntry(index)) && isObjectEntry(newValue));
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94 } else {
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95 if (valueState.getState() != EscapeState.Virtual) {
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96 newValue = valueState.getMaterializedValue();
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97 assert newValue.kind() == Kind.Object;
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98 } else {
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99 newValue = valueState.getVirtualObject();
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100 }
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101 assert obj.getEntry(index) == null || isObjectEntry(obj.getEntry(index));
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102 }
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103 obj.setEntry(index, newValue);
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104 }
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105
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106 private static boolean isObjectEntry(ValueNode value) {
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107 return value.kind() == Kind.Object || value instanceof VirtualObjectNode;
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108 }
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109
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110 @Override
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111 public ValueNode getMaterializedValue(ValueNode value) {
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112 ObjectState obj = state.getObjectState(value);
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113 return obj != null && !obj.isVirtual() ? obj.getMaterializedValue() : null;
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114 }
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115
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116 @Override
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117 public ValueNode getReplacedValue(ValueNode original) {
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118 return state.getScalarAlias(original);
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119 }
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120
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121 @Override
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122 public void replaceWithVirtual(VirtualObjectNode virtual) {
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123 state.addAndMarkAlias(virtual, current, usages);
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124 if (current instanceof FixedWithNextNode) {
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125 effects.deleteFixedNode((FixedWithNextNode) current);
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126 }
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127 deleted = true;
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128 }
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129
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130 @Override
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131 public void replaceWithValue(ValueNode replacement) {
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132 effects.replaceAtUsages(current, state.getScalarAlias(replacement));
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133 state.addScalarAlias(current, replacement);
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134 deleted = true;
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135 }
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136
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137 @Override
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138 public void delete() {
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139 assert current instanceof FixedWithNextNode;
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140 effects.deleteFixedNode((FixedWithNextNode) current);
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141 deleted = true;
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142 }
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143
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144 @Override
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145 public void replaceFirstInput(Node oldInput, Node replacement) {
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146 effects.replaceFirstInput(current, oldInput, replacement);
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147 }
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148
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149 @Override
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150 public void addNode(ValueNode node) {
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151 if (node instanceof FloatingNode) {
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152 effects.addFloatingNode(node, "VirtualizerTool");
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153 } else {
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154 effects.addFixedNodeBefore((FixedWithNextNode) node, position);
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155 }
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156 }
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157
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158 @Override
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159 public void createVirtualObject(VirtualObjectNode virtualObject, ValueNode[] entryState, int[] locks) {
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160 VirtualUtil.trace("{{%s}} ", current);
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161 if (virtualObject.isAlive()) {
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162 state.addAndMarkAlias(virtualObject, virtualObject, usages);
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163 } else {
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164 effects.addFloatingNode(virtualObject, "newVirtualObject");
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165 }
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166 for (int i = 0; i < entryState.length; i++) {
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167 entryState[i] = state.getScalarAlias(entryState[i]);
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168 }
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169 state.addObject(virtualObject, new ObjectState(virtualObject, entryState, EscapeState.Virtual, locks));
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170 state.addAndMarkAlias(virtualObject, virtualObject, usages);
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171 PartialEscapeClosure.METRIC_ALLOCATION_REMOVED.increment();
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172 }
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173
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174 @Override
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175 public int getMaximumEntryCount() {
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176 return MaximumEscapeAnalysisArrayLength.getValue();
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177 }
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178
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179 @Override
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180 public void replaceWith(ValueNode node) {
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181 State resultState = getObjectState(node);
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182 if (resultState == null) {
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183 replaceWithValue(node);
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184 } else {
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185 if (resultState.getState() == EscapeState.Virtual) {
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186 replaceWithVirtual(resultState.getVirtualObject());
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187 } else {
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188 replaceWithValue(resultState.getMaterializedValue());
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189 }
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190 }
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191 }
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192
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193 @Override
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194 public void addReadCache(ValueNode object, ResolvedJavaField identity, ValueNode value) {
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195 if (OptEarlyReadElimination.getValue()) {
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196 state.addReadCache(object, identity, value);
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197 }
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198 }
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199
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200 @Override
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201 public ValueNode getReadCache(ValueNode object, ResolvedJavaField identity) {
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202 if (OptEarlyReadElimination.getValue()) {
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203 return state.getReadCache(object, identity);
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204 }
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205 return null;
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206 }
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207
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208 @Override
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209 public void killReadCache(ResolvedJavaField identity) {
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210 if (OptEarlyReadElimination.getValue()) {
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211 state.killReadCache(identity);
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212 }
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213 }
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214 }