Mercurial > hg > truffle
annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/NewObjectSnippets.java @ 9516:cf8104ed68ba
Merge.
author | Doug Simon <doug.simon@oracle.com> |
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date | Thu, 02 May 2013 14:12:24 +0200 |
parents | 659bb6cf930c 106f0a0acafa |
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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.replacements; |
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24 |
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25 import static com.oracle.graal.api.code.UnsignedMath.*; |
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26 import static com.oracle.graal.hotspot.replacements.HotSpotReplacementsUtil.*; |
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27 import static com.oracle.graal.nodes.extended.UnsafeArrayCastNode.*; |
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28 import static com.oracle.graal.nodes.extended.UnsafeCastNode.*; |
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29 import static com.oracle.graal.replacements.SnippetTemplate.*; |
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30 import static com.oracle.graal.replacements.nodes.BranchProbabilityNode.*; |
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31 import static com.oracle.graal.replacements.nodes.ExplodeLoopNode.*; |
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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.hotspot.meta.*; |
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37 import com.oracle.graal.hotspot.nodes.*; |
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38 import com.oracle.graal.nodes.*; |
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39 import com.oracle.graal.nodes.java.*; |
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40 import com.oracle.graal.nodes.spi.*; |
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41 import com.oracle.graal.nodes.type.*; |
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42 import com.oracle.graal.phases.*; |
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43 import com.oracle.graal.replacements.*; |
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44 import com.oracle.graal.replacements.Snippet.ConstantParameter; |
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45 import com.oracle.graal.replacements.Snippet.VarargsParameter; |
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46 import com.oracle.graal.replacements.SnippetTemplate.AbstractTemplates; |
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47 import com.oracle.graal.replacements.SnippetTemplate.Arguments; |
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48 import com.oracle.graal.replacements.SnippetTemplate.SnippetInfo; |
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49 import com.oracle.graal.replacements.nodes.*; |
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50 import com.oracle.graal.word.*; |
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51 |
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52 /** |
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53 * Snippets used for implementing NEW, ANEWARRAY and NEWARRAY. |
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54 */ |
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55 public class NewObjectSnippets implements Snippets { |
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56 |
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57 @Snippet |
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58 public static Word allocate(int size) { |
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59 Word thread = thread(); |
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60 Word top = readTlabTop(thread); |
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61 Word end = readTlabEnd(thread); |
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62 Word newTop = top.add(size); |
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63 /* |
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64 * this check might lead to problems if the TLAB is within 16GB of the address space end |
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65 * (checked in c++ code) |
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66 */ |
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67 if (probability(FAST_PATH_PROBABILITY, newTop.belowOrEqual(end))) { |
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68 writeTlabTop(thread, newTop); |
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69 return top; |
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70 } |
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71 return Word.zero(); |
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72 } |
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73 |
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74 @Snippet |
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75 public static Object initializeObject(Word memory, Word hub, Word prototypeMarkWord, @ConstantParameter int size, @ConstantParameter boolean fillContents) { |
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76 |
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77 Object result; |
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78 if (probability(SLOW_PATH_PROBABILITY, memory.equal(0))) { |
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79 new_stub.inc(); |
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80 result = NewInstanceStubCall.call(hub); |
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81 } else { |
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82 formatObject(hub, size, memory, prototypeMarkWord, fillContents); |
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83 result = memory.toObject(); |
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84 } |
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85 /* |
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86 * make sure that the unsafeCast is anchored after initialization, see ReadAfterCheckCast |
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87 * and CheckCastSnippets |
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88 */ |
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89 BeginNode anchorNode = BeginNode.anchor(StampFactory.forNodeIntrinsic()); |
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90 return unsafeCast(verifyOop(result), StampFactory.forNodeIntrinsic(), anchorNode); |
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91 } |
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92 |
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93 @Snippet |
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94 public static Object initializeArray(Word memory, Word hub, int length, int allocationSize, Word prototypeMarkWord, @ConstantParameter int headerSize, @ConstantParameter boolean fillContents) { |
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95 Object result; |
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96 if (probability(SLOW_PATH_PROBABILITY, memory.equal(0))) { |
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97 newarray_stub.inc(); |
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98 result = NewArrayStubCall.call(hub, length); |
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99 } else { |
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100 newarray_loopInit.inc(); |
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101 formatArray(hub, allocationSize, length, headerSize, memory, prototypeMarkWord, fillContents); |
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102 result = memory.toObject(); |
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103 } |
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104 BeginNode anchorNode = BeginNode.anchor(StampFactory.forNodeIntrinsic()); |
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105 return unsafeArrayCast(verifyOop(result), length, StampFactory.forNodeIntrinsic(), anchorNode); |
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106 } |
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107 |
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108 /** |
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109 * Maximum array length for which fast path allocation is used. |
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110 */ |
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111 public static final int MAX_ARRAY_FAST_PATH_ALLOCATION_LENGTH = 0x00FFFFFF; |
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112 |
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113 @Snippet |
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114 public static Object allocateArrayAndInitialize(int length, @ConstantParameter int alignment, @ConstantParameter int headerSize, @ConstantParameter int log2ElementSize, |
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115 @ConstantParameter boolean fillContents, @ConstantParameter ResolvedJavaType type) { |
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116 if (!belowThan(length, MAX_ARRAY_FAST_PATH_ALLOCATION_LENGTH)) { |
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117 // This handles both negative array sizes and very large array sizes |
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118 DeoptimizeNode.deopt(DeoptimizationAction.None, DeoptimizationReason.RuntimeConstraint); |
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119 } |
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120 int allocationSize = computeArrayAllocationSize(length, alignment, headerSize, log2ElementSize); |
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121 Word memory = TLABAllocateNode.allocateVariableSize(allocationSize); |
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122 return InitializeArrayNode.initialize(memory, length, allocationSize, type, fillContents); |
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123 } |
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124 |
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125 /** |
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126 * Computes the size of the memory chunk allocated for an array. This size accounts for the |
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127 * array header size, boy size and any padding after the last element to satisfy object |
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128 * alignment requirements. |
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129 * |
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130 * @param length the number of elements in the array |
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131 * @param alignment the object alignment requirement |
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132 * @param headerSize the size of the array header |
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133 * @param log2ElementSize log2 of the size of an element in the array |
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134 */ |
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135 public static int computeArrayAllocationSize(int length, int alignment, int headerSize, int log2ElementSize) { |
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136 int size = (length << log2ElementSize) + headerSize + (alignment - 1); |
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137 int mask = ~(alignment - 1); |
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138 return size & mask; |
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139 } |
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140 |
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141 /** |
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142 * Calls the runtime stub for implementing MULTIANEWARRAY. |
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143 */ |
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144 @Snippet |
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145 public static Object newmultiarray(Word hub, @ConstantParameter int rank, @VarargsParameter int[] dimensions) { |
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146 Word dims = DimensionsNode.allocaDimsArray(rank); |
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147 ExplodeLoopNode.explodeLoop(); |
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148 for (int i = 0; i < rank; i++) { |
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149 dims.writeInt(i * 4, dimensions[i], ANY_LOCATION); |
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150 } |
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151 return NewMultiArrayStubCall.call(hub, rank, dims); |
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152 } |
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153 |
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154 /** |
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155 * Maximum size of an object whose body is initialized by a sequence of zero-stores to its |
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156 * fields. Larger objects have their bodies initialized in a loop. |
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157 */ |
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158 private static final int MAX_UNROLLED_OBJECT_ZEROING_SIZE = 10 * wordSize(); |
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159 |
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160 /** |
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161 * Formats some allocated memory with an object header zeroes out the rest. |
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162 */ |
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163 private static void formatObject(Word hub, int size, Word memory, Word compileTimePrototypeMarkWord, boolean fillContents) { |
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164 Word prototypeMarkWord = useBiasedLocking() ? hub.readWord(prototypeMarkWordOffset(), PROTOTYPE_MARK_WORD_LOCATION) : compileTimePrototypeMarkWord; |
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165 initializeObjectHeader(memory, prototypeMarkWord, hub); |
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166 if (fillContents) { |
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167 if (size <= MAX_UNROLLED_OBJECT_ZEROING_SIZE) { |
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168 new_seqInit.inc(); |
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169 explodeLoop(); |
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170 for (int offset = 2 * wordSize(); offset < size; offset += wordSize()) { |
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171 memory.writeWord(offset, Word.zero(), ANY_LOCATION); |
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172 } |
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173 } else { |
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174 new_loopInit.inc(); |
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175 for (int offset = 2 * wordSize(); offset < size; offset += wordSize()) { |
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176 memory.writeWord(offset, Word.zero(), ANY_LOCATION); |
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177 } |
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178 } |
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179 } |
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180 } |
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181 |
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182 /** |
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183 * Formats some allocated memory with an object header zeroes out the rest. |
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184 */ |
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185 public static void formatArray(Word hub, int allocationSize, int length, int headerSize, Word memory, Word prototypeMarkWord, boolean fillContents) { |
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186 memory.writeInt(arrayLengthOffset(), length, ANY_LOCATION); |
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187 /* |
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188 * store hub last as the concurrent garbage collectors assume length is valid if hub field |
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189 * is not null |
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190 */ |
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191 initializeObjectHeader(memory, prototypeMarkWord, hub); |
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192 if (fillContents) { |
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193 for (int offset = headerSize; offset < allocationSize; offset += wordSize()) { |
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194 memory.writeWord(offset, Word.zero(), ANY_LOCATION); |
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195 } |
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196 } |
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197 } |
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198 |
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199 public static class Templates extends AbstractTemplates { |
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200 |
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201 private final SnippetInfo allocate = snippet(NewObjectSnippets.class, "allocate"); |
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202 private final SnippetInfo initializeObject = snippet(NewObjectSnippets.class, "initializeObject"); |
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203 private final SnippetInfo initializeArray = snippet(NewObjectSnippets.class, "initializeArray"); |
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204 private final SnippetInfo allocateArrayAndInitialize = snippet(NewObjectSnippets.class, "allocateArrayAndInitialize"); |
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205 private final SnippetInfo newmultiarray = snippet(NewObjectSnippets.class, "newmultiarray"); |
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206 |
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207 private final boolean useTLAB; |
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208 |
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209 public Templates(CodeCacheProvider runtime, Replacements replacements, TargetDescription target, boolean useTLAB) { |
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210 super(runtime, replacements, target); |
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211 this.useTLAB = useTLAB; |
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212 } |
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213 |
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214 /** |
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215 * Lowers a {@link NewInstanceNode}. |
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216 */ |
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217 @SuppressWarnings("unused") |
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218 public void lower(NewInstanceNode newInstanceNode, LoweringTool tool) { |
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219 StructuredGraph graph = (StructuredGraph) newInstanceNode.graph(); |
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220 HotSpotResolvedObjectType type = (HotSpotResolvedObjectType) newInstanceNode.instanceClass(); |
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221 ConstantNode hub = ConstantNode.forConstant(type.klass(), runtime, graph); |
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222 int size = instanceSize(type); |
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223 |
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224 ValueNode memory; |
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225 if (!useTLAB) { |
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226 memory = ConstantNode.defaultForKind(target.wordKind, graph); |
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227 } else { |
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228 ConstantNode sizeNode = ConstantNode.forInt(size, graph); |
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229 TLABAllocateNode tlabAllocateNode = graph.add(new TLABAllocateNode(sizeNode)); |
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230 graph.addBeforeFixed(newInstanceNode, tlabAllocateNode); |
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231 memory = tlabAllocateNode; |
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232 } |
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233 InitializeObjectNode initializeNode = graph.add(new InitializeObjectNode(memory, type, newInstanceNode.fillContents())); |
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234 graph.replaceFixedWithFixed(newInstanceNode, initializeNode); |
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235 } |
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236 |
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237 /** |
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238 * Lowers a {@link NewArrayNode}. |
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239 */ |
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240 @SuppressWarnings("unused") |
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241 public void lower(NewArrayNode newArrayNode, LoweringTool tool) { |
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242 StructuredGraph graph = (StructuredGraph) newArrayNode.graph(); |
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243 ValueNode lengthNode = newArrayNode.length(); |
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244 TLABAllocateNode tlabAllocateNode; |
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245 ResolvedJavaType elementType = newArrayNode.elementType(); |
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246 ResolvedJavaType arrayType = elementType.getArrayClass(); |
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247 Kind elementKind = elementType.getKind(); |
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248 final int alignment = target.wordSize; |
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249 final int headerSize = HotSpotRuntime.getArrayBaseOffset(elementKind); |
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250 final Integer length = lengthNode.isConstant() ? Integer.valueOf(lengthNode.asConstant().asInt()) : null; |
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251 int log2ElementSize = CodeUtil.log2(target.arch.getSizeInBytes(elementKind)); |
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252 if (!useTLAB) { |
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253 ConstantNode zero = ConstantNode.defaultForKind(target.wordKind, graph); |
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254 /* |
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255 * value for 'size' doesn't matter as it isn't used since a stub call will be made |
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256 * anyway for both allocation and initialization - it just needs to be non-null |
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257 */ |
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258 ConstantNode size = ConstantNode.forInt(-1, graph); |
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259 InitializeArrayNode initializeNode = graph.add(new InitializeArrayNode(zero, lengthNode, size, arrayType, newArrayNode.fillContents())); |
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260 graph.replaceFixedWithFixed(newArrayNode, initializeNode); |
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261 } else if (length != null && belowThan(length, MAX_ARRAY_FAST_PATH_ALLOCATION_LENGTH)) { |
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262 // Calculate aligned size |
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263 int size = computeArrayAllocationSize(length, alignment, headerSize, log2ElementSize); |
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264 ConstantNode sizeNode = ConstantNode.forInt(size, graph); |
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265 tlabAllocateNode = graph.add(new TLABAllocateNode(sizeNode)); |
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266 graph.addBeforeFixed(newArrayNode, tlabAllocateNode); |
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267 InitializeArrayNode initializeNode = graph.add(new InitializeArrayNode(tlabAllocateNode, lengthNode, sizeNode, arrayType, newArrayNode.fillContents())); |
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268 graph.replaceFixedWithFixed(newArrayNode, initializeNode); |
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269 } else { |
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270 Arguments args = new Arguments(allocateArrayAndInitialize); |
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271 args.add("length", lengthNode); |
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272 args.addConst("alignment", alignment); |
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273 args.addConst("headerSize", headerSize); |
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274 args.addConst("log2ElementSize", log2ElementSize); |
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275 args.addConst("fillContents", newArrayNode.fillContents()); |
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276 args.addConst("type", arrayType); |
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277 |
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278 SnippetTemplate template = template(args); |
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279 Debug.log("Lowering allocateArrayAndInitialize in %s: node=%s, template=%s, arguments=%s", graph, newArrayNode, template, args); |
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280 template.instantiate(runtime, newArrayNode, DEFAULT_REPLACER, args); |
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281 } |
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282 } |
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283 |
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284 @SuppressWarnings("unused") |
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285 public void lower(TLABAllocateNode tlabAllocateNode, LoweringTool tool) { |
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286 StructuredGraph graph = (StructuredGraph) tlabAllocateNode.graph(); |
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287 ValueNode size = tlabAllocateNode.size(); |
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288 Arguments args = new Arguments(allocate).add("size", size); |
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289 |
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290 SnippetTemplate template = template(args); |
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291 Debug.log("Lowering fastAllocate in %s: node=%s, template=%s, arguments=%s", graph, tlabAllocateNode, template, args); |
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292 template.instantiate(runtime, tlabAllocateNode, DEFAULT_REPLACER, args); |
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293 } |
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294 |
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295 @SuppressWarnings("unused") |
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296 public void lower(InitializeObjectNode initializeNode, LoweringTool tool) { |
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297 StructuredGraph graph = (StructuredGraph) initializeNode.graph(); |
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298 HotSpotResolvedObjectType type = (HotSpotResolvedObjectType) initializeNode.type(); |
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299 assert !type.isArray(); |
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300 ConstantNode hub = ConstantNode.forConstant(type.klass(), runtime, graph); |
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301 int size = instanceSize(type); |
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302 ValueNode memory = initializeNode.memory(); |
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303 |
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304 Arguments args = new Arguments(initializeObject); |
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305 args.add("memory", memory); |
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306 args.add("hub", hub); |
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307 args.add("prototypeMarkWord", type.prototypeMarkWord()); |
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308 args.addConst("size", size).addConst("fillContents", initializeNode.fillContents()); |
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309 |
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310 SnippetTemplate template = template(args); |
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311 Debug.log("Lowering initializeObject in %s: node=%s, template=%s, arguments=%s", graph, initializeNode, template, args); |
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312 template.instantiate(runtime, initializeNode, DEFAULT_REPLACER, args); |
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313 } |
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314 |
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315 @SuppressWarnings("unused") |
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316 public void lower(InitializeArrayNode initializeNode, LoweringTool tool) { |
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317 StructuredGraph graph = (StructuredGraph) initializeNode.graph(); |
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318 HotSpotResolvedObjectType type = (HotSpotResolvedObjectType) initializeNode.type(); |
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319 ResolvedJavaType elementType = type.getComponentType(); |
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320 assert elementType != null; |
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321 ConstantNode hub = ConstantNode.forConstant(type.klass(), runtime, graph); |
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Cleanup of Graal API: Rename methods so that it follows the getXxx naming convention and so that they are similar to the names of the java.lang.reflect classes. Remove unused methods.
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322 Kind elementKind = elementType.getKind(); |
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323 final int headerSize = HotSpotRuntime.getArrayBaseOffset(elementKind); |
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added snippets for lowering array creation and initialization (in NewObjectSnippets)
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324 ValueNode memory = initializeNode.memory(); |
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325 |
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326 Arguments args = new Arguments(initializeArray); |
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327 args.add("memory", memory); |
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328 args.add("hub", hub); |
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329 args.add("length", initializeNode.length()); |
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330 args.add("allocationSize", initializeNode.allocationSize()); |
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331 args.add("prototypeMarkWord", type.prototypeMarkWord()); |
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332 args.addConst("headerSize", headerSize); |
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333 args.addConst("fillContents", initializeNode.fillContents()); |
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334 |
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335 SnippetTemplate template = template(args); |
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336 Debug.log("Lowering initializeArray in %s: node=%s, template=%s, arguments=%s", graph, initializeNode, template, args); |
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337 template.instantiate(runtime, initializeNode, DEFAULT_REPLACER, args); |
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added NewInstanceSnippets for lowering NewInstanceNodes (currently disabled by default)
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338 } |
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added snippet for lowering NewMultiArrayNodes
Doug Simon <doug.simon@oracle.com>
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339 |
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340 @SuppressWarnings("unused") |
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341 public void lower(NewMultiArrayNode newmultiarrayNode, LoweringTool tool) { |
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342 StructuredGraph graph = (StructuredGraph) newmultiarrayNode.graph(); |
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343 int rank = newmultiarrayNode.dimensionCount(); |
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344 ValueNode[] dims = new ValueNode[rank]; |
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345 for (int i = 0; i < newmultiarrayNode.dimensionCount(); i++) { |
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346 dims[i] = newmultiarrayNode.dimension(i); |
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347 } |
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9ba90252ce08
HotSpotResolvedJavaType is now the HotSpot implementation of ResolvedJavaType,
Gilles Duboscq <duboscq@ssw.jku.at>
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348 HotSpotResolvedObjectType type = (HotSpotResolvedObjectType) newmultiarrayNode.type(); |
6950
41938af2b3d8
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Doug Simon <doug.simon@oracle.com>
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349 ConstantNode hub = ConstantNode.forConstant(type.klass(), runtime, graph); |
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350 |
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351 Arguments args = new Arguments(newmultiarray); |
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352 args.add("hub", hub); |
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353 args.addConst("rank", rank); |
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354 args.addVarargs("dimensions", int.class, StampFactory.forKind(Kind.Int), dims); |
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355 template(args).instantiate(runtime, newmultiarrayNode, DEFAULT_REPLACER, args); |
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356 } |
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5d9c23b8dbb8
factored out common code in NewObjectSnippets
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357 |
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358 private static int instanceSize(HotSpotResolvedObjectType type) { |
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359 int size = type.instanceSize(); |
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360 assert (size % wordSize()) == 0; |
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361 assert size >= 0; |
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362 return size; |
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363 } |
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added NewInstanceSnippets for lowering NewInstanceNodes (currently disabled by default)
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364 } |
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365 |
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Doug Simon <doug.simon@oracle.com>
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366 private static final SnippetCounter.Group countersNew = GraalOptions.SnippetCounters ? new SnippetCounter.Group("NewInstance") : null; |
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367 private static final SnippetCounter new_seqInit = new SnippetCounter(countersNew, "tlabSeqInit", "TLAB alloc with unrolled zeroing"); |
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368 private static final SnippetCounter new_loopInit = new SnippetCounter(countersNew, "tlabLoopInit", "TLAB alloc with zeroing in a loop"); |
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369 private static final SnippetCounter new_stub = new SnippetCounter(countersNew, "stub", "alloc and zeroing via stub"); |
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370 |
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consolidated new_type_array and new_object_array stubs into one as there no difference between them
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371 private static final SnippetCounter.Group countersNewArray = GraalOptions.SnippetCounters ? new SnippetCounter.Group("NewArray") : null; |
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372 private static final SnippetCounter newarray_loopInit = new SnippetCounter(countersNewArray, "tlabLoopInit", "TLAB alloc with zeroing in a loop"); |
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373 private static final SnippetCounter newarray_stub = new SnippetCounter(countersNewArray, "stub", "alloc and zeroing via stub"); |
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374 } |