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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/snippets/NewInstanceSnippets.java @ 5720:46ad94a0574a

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moved everything from com.oracle.graal.nodes.cri into com.oracle.graal.nodes.spi
author Doug Simon <doug.simon@oracle.com>
date Thu, 28 Jun 2012 13:39:40 +0200
parents 10341299528c
children
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1 /*
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2 * Copyright (c) 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.hotspot.snippets;
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24
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25 import static com.oracle.graal.hotspot.nodes.CastFromHub.*;
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26 import static com.oracle.graal.hotspot.nodes.RegisterNode.*;
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27 import static com.oracle.graal.hotspot.snippets.DirectObjectStoreNode.*;
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28 import static com.oracle.graal.nodes.extended.UnsafeLoadNode.*;
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29 import static com.oracle.graal.snippets.SnippetTemplate.Arguments.*;
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30 import static com.oracle.graal.snippets.nodes.ExplodeLoopNode.*;
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31 import static com.oracle.max.asm.target.amd64.AMD64.*;
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32
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33 import com.oracle.graal.api.code.*;
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34 import com.oracle.graal.api.meta.*;
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35 import com.oracle.graal.debug.*;
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36 import com.oracle.graal.graph.*;
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37 import com.oracle.graal.hotspot.*;
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38 import com.oracle.graal.hotspot.meta.*;
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39 import com.oracle.graal.hotspot.nodes.*;
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40 import com.oracle.graal.nodes.*;
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41 import com.oracle.graal.nodes.java.*;
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42 import com.oracle.graal.nodes.spi.*;
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43 import com.oracle.graal.snippets.*;
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44 import com.oracle.graal.snippets.Snippet.ConstantParameter;
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45 import com.oracle.graal.snippets.Snippet.Fold;
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46 import com.oracle.graal.snippets.Snippet.Parameter;
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47 import com.oracle.graal.snippets.SnippetTemplate.Arguments;
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48 import com.oracle.graal.snippets.SnippetTemplate.Cache;
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49 import com.oracle.graal.snippets.SnippetTemplate.Key;
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50
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51 /**
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52 * Snippets used for implementing NEW.
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53 */
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54 public class NewInstanceSnippets implements SnippetsInterface {
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55
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56 @Snippet
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57 public static Word allocate(@ConstantParameter("size") int size) {
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58 Word thread = asWord(register(r15, wordKind()));
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59 Word top = loadWord(thread, threadTlabTopOffset());
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60 Word end = loadWord(thread, threadTlabEndOffset());
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61 Word newTop = top.plus(size);
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62 if (newTop.belowOrEqual(end)) {
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63 store(thread, 0, threadTlabTopOffset(), newTop);
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64 return top;
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65 }
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66 return Word.zero();
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67 }
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68
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69 @Snippet
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70 public static Object initialize(
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71 @Parameter("memory") Word memory,
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72 @Parameter("hub") Object hub,
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73 @Parameter("prototypeHeader") Word headerPrototype,
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74 @ConstantParameter("size") int size) {
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75
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76 if (memory == Word.zero()) {
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77 return NewInstanceStubCall.call(hub);
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78 }
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79 formatObject(hub, size, memory, headerPrototype);
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80 Object instance = memory.toObject();
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81 return castFromHub(verifyOop(instance), hub);
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82 }
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83
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84 private static Object verifyOop(Object object) {
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85 if (verifyOops()) {
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86 VerifyOopStubCall.call(object);
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87 }
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88 return object;
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89 }
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90
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91 private static Word asWord(Object object) {
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92 return Word.fromObject(object);
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93 }
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94
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95 private static Word loadWord(Word address, int offset) {
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96 Object value = loadObject(address, 0, offset, true);
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97 return asWord(value);
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98 }
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99
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100 /**
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101 * Maximum size of an object whose body is initialized by a sequence of
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102 * zero-stores to its fields. Larger objects have their bodies initialized
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103 * in a loop.
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104 */
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105 private static final int MAX_UNROLLED_OBJECT_INITIALIZATION_SIZE = 10 * wordSize();
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106
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107 /**
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108 * Formats some allocated memory with an object header zeroes out the rest.
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109 */
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110 private static void formatObject(Object hub, int size, Word memory, Word headerPrototype) {
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111 store(memory, 0, 0, headerPrototype);
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112 store(memory, 0, hubOffset(), hub);
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113 if (size <= MAX_UNROLLED_OBJECT_INITIALIZATION_SIZE) {
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114 explodeLoop();
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115 for (int offset = 2 * wordSize(); offset < size; offset += wordSize()) {
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116 store(memory, 0, offset, 0);
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117 }
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118 } else {
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119 for (int offset = 2 * wordSize(); offset < size; offset += wordSize()) {
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120 store(memory, 0, offset, 0);
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121 }
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122 }
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123 }
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124
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125 @Fold
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126 private static boolean verifyOops() {
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127 return HotSpotGraalRuntime.getInstance().getConfig().verifyOops;
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128 }
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129
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130 @Fold
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131 private static int threadTlabTopOffset() {
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132 return HotSpotGraalRuntime.getInstance().getConfig().threadTlabTopOffset;
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133 }
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134
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135 @Fold
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136 private static int threadTlabEndOffset() {
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137 return HotSpotGraalRuntime.getInstance().getConfig().threadTlabEndOffset;
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138 }
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139
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140 @Fold
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141 private static Kind wordKind() {
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142 return HotSpotGraalRuntime.getInstance().getTarget().wordKind;
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143 }
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144
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145 @Fold
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146 private static int wordSize() {
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147 return HotSpotGraalRuntime.getInstance().getTarget().wordSize;
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148 }
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149
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150 @Fold
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151 private static int hubOffset() {
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152 return HotSpotGraalRuntime.getInstance().getConfig().hubOffset;
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153 }
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154
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155 public static class Templates {
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156
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157 private final Cache cache;
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158 private final ResolvedJavaMethod allocate;
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159 private final ResolvedJavaMethod initialize;
5563
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160 private final CodeCacheProvider runtime;
5602
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161 private final boolean useTLAB;
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162
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163 public Templates(CodeCacheProvider runtime, boolean useTLAB) {
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164 this.runtime = runtime;
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165 this.cache = new Cache(runtime);
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166 this.useTLAB = useTLAB;
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167 try {
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168 allocate = runtime.getResolvedJavaMethod(NewInstanceSnippets.class.getDeclaredMethod("allocate", int.class));
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169 initialize = runtime.getResolvedJavaMethod(NewInstanceSnippets.class.getDeclaredMethod("initialize", Word.class, Object.class, Word.class, int.class));
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170 } catch (NoSuchMethodException e) {
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171 throw new GraalInternalError(e);
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172 }
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173 }
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174
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175 /**
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176 * Lowers a {@link NewInstanceNode}.
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177 */
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178 @SuppressWarnings("unused")
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179 public void lower(NewInstanceNode newInstanceNode, LoweringTool tool) {
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180 StructuredGraph graph = (StructuredGraph) newInstanceNode.graph();
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181 HotSpotResolvedJavaType type = (HotSpotResolvedJavaType) newInstanceNode.instanceClass();
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182 HotSpotKlassOop hub = type.klassOop();
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183 int size = type.instanceSize();
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184 assert (size % wordSize()) == 0;
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185 assert size >= 0;
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186
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187 ValueNode memory;
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188 if (!useTLAB) {
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189 memory = ConstantNode.forObject(null, runtime, graph);
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190 } else {
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191 TLABAllocateNode tlabAllocateNode = graph.add(new TLABAllocateNode(size, wordKind()));
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192 graph.addBeforeFixed(newInstanceNode, tlabAllocateNode);
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193 memory = tlabAllocateNode;
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194 }
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195 InitializeNode initializeNode = graph.add(new InitializeNode(memory, type));
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196 graph.replaceFixedWithFixed(newInstanceNode, initializeNode);
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197 }
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198
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199 @SuppressWarnings("unused")
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200 public void lower(TLABAllocateNode tlabAllocateNode, LoweringTool tool) {
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201 StructuredGraph graph = (StructuredGraph) tlabAllocateNode.graph();
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202 int size = tlabAllocateNode.size();
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203 assert (size % wordSize()) == 0;
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204 assert size >= 0;
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205 Key key = new Key(allocate).add("size", size);
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206 Arguments arguments = new Arguments();
5563
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207 SnippetTemplate template = cache.get(key);
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diff changeset
208 Debug.log("Lowering fastAllocate in %s: node=%s, template=%s, arguments=%s", graph, tlabAllocateNode, template, arguments);
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diff changeset
209 template.instantiate(runtime, tlabAllocateNode, tlabAllocateNode, arguments);
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210 }
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211
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diff changeset
212 @SuppressWarnings("unused")
5718
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diff changeset
213 public void lower(InitializeNode initializeNode, LoweringTool tool) {
5663
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214 StructuredGraph graph = (StructuredGraph) initializeNode.graph();
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diff changeset
215 HotSpotResolvedJavaType type = (HotSpotResolvedJavaType) initializeNode.type();
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diff changeset
216 HotSpotKlassOop hub = type.klassOop();
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diff changeset
217 int size = type.instanceSize();
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diff changeset
218 assert (size % wordSize()) == 0;
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diff changeset
219 assert size >= 0;
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diff changeset
220 Key key = new Key(initialize).add("size", size);
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diff changeset
221 ValueNode memory = initializeNode.memory();
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diff changeset
222 //assert memory instanceof AllocateNode || memory instanceof ConstantNode : memory;
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diff changeset
223 Arguments arguments = arguments("memory", memory).add("hub", hub).add("prototypeHeader", type.prototypeHeader());
5663
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diff changeset
224 SnippetTemplate template = cache.get(key);
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diff changeset
225 Debug.log("Lowering initialize in %s: node=%s, template=%s, arguments=%s", graph, initializeNode, template, arguments);
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diff changeset
226 template.instantiate(runtime, initializeNode, initializeNode, arguments);
5563
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227 }
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228 }
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229 }