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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/arraycopy/ArrayCopySnippets.java @ 21554:b1530a6cce8c

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renamed com.oracle.graal.[debug|options|hotspotvmconfig]* modules to com.oracle.jvmci.[debug|options|hotspotvmconfig]* modules (JBS:GRAAL-53)
author Doug Simon <doug.simon@oracle.com>
date Tue, 26 May 2015 23:21:15 +0200
parents 5324104ac4f3
children 48c1ebd24120
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1 /*
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2 * Copyright (c) 2011, 2015, 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.arraycopy;
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24
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25 import static com.oracle.graal.compiler.common.GraalOptions.*;
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26 import static com.oracle.graal.hotspot.replacements.HotSpotReplacementsUtil.*;
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27 import static com.oracle.graal.nodes.GuardingPiNode.*;
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28 import static com.oracle.graal.nodes.extended.BranchProbabilityNode.*;
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29
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30 import java.lang.reflect.*;
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31 import java.util.*;
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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.api.replacements.*;
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36 import com.oracle.graal.graph.*;
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37 import com.oracle.graal.hotspot.meta.*;
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38 import com.oracle.graal.hotspot.nodes.type.*;
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39 import com.oracle.graal.hotspot.word.*;
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40 import com.oracle.graal.loop.phases.*;
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41 import com.oracle.graal.nodes.*;
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42 import com.oracle.graal.nodes.extended.*;
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43 import com.oracle.graal.nodes.java.*;
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44 import com.oracle.graal.nodes.spi.*;
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45 import com.oracle.graal.nodes.type.*;
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46 import com.oracle.graal.phases.common.*;
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47 import com.oracle.graal.phases.tiers.*;
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48 import com.oracle.graal.replacements.*;
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49 import com.oracle.graal.replacements.Snippet.ConstantParameter;
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50 import com.oracle.graal.replacements.SnippetTemplate.Arguments;
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51 import com.oracle.graal.replacements.SnippetTemplate.SnippetInfo;
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52 import com.oracle.graal.replacements.nodes.*;
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53 import com.oracle.graal.word.*;
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54 import com.oracle.jvmci.common.*;
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55 import com.oracle.jvmci.debug.*;
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56 import com.oracle.jvmci.debug.Debug.Scope;
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57 import com.oracle.jvmci.hotspot.*;
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58
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59 public class ArrayCopySnippets implements Snippets {
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60
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61 private static int checkArrayType(KlassPointer hub) {
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62 int layoutHelper = readLayoutHelper(hub);
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63 if (probability(SLOW_PATH_PROBABILITY, layoutHelper >= 0)) {
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64 DeoptimizeNode.deopt(DeoptimizationAction.None, DeoptimizationReason.RuntimeConstraint);
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65 }
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66 return layoutHelper;
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67 }
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68
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69 private static void checkLimits(Object src, int srcPos, Object dest, int destPos, int length) {
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70 if (probability(SLOW_PATH_PROBABILITY, srcPos < 0)) {
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71 checkAIOOBECounter.inc();
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72 DeoptimizeNode.deopt(DeoptimizationAction.None, DeoptimizationReason.RuntimeConstraint);
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73 }
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74 if (probability(SLOW_PATH_PROBABILITY, destPos < 0)) {
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75 checkAIOOBECounter.inc();
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76 DeoptimizeNode.deopt(DeoptimizationAction.None, DeoptimizationReason.RuntimeConstraint);
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77 }
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78 if (probability(SLOW_PATH_PROBABILITY, length < 0)) {
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79 checkAIOOBECounter.inc();
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80 DeoptimizeNode.deopt(DeoptimizationAction.None, DeoptimizationReason.RuntimeConstraint);
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81 }
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82 if (probability(SLOW_PATH_PROBABILITY, srcPos + length > ArrayLengthNode.arrayLength(src))) {
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83 checkAIOOBECounter.inc();
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84 DeoptimizeNode.deopt(DeoptimizationAction.None, DeoptimizationReason.RuntimeConstraint);
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85 }
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86 if (probability(SLOW_PATH_PROBABILITY, destPos + length > ArrayLengthNode.arrayLength(dest))) {
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87 checkAIOOBECounter.inc();
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88 DeoptimizeNode.deopt(DeoptimizationAction.None, DeoptimizationReason.RuntimeConstraint);
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89 }
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90 checkSuccessCounter.inc();
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91 }
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92
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93 @Snippet
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94 public static void arraycopyZeroLengthIntrinsic(Object src, int srcPos, Object dest, int destPos, int length) {
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95 Object nonNullSrc = guardingNonNull(src);
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96 Object nonNullDest = guardingNonNull(dest);
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97 KlassPointer srcHub = loadHub(nonNullSrc);
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98 KlassPointer destHub = loadHub(nonNullDest);
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99 checkArrayType(srcHub);
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100 checkArrayType(destHub);
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101 checkLimits(nonNullSrc, srcPos, nonNullDest, destPos, length);
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102 zeroLengthStaticCounter.inc();
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103 }
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104
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105 @Snippet
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106 public static void arraycopyExactIntrinsic(Object src, int srcPos, Object dest, int destPos, int length, @ConstantParameter Kind elementKind, @ConstantParameter SnippetCounter counter) {
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107 Object nonNullSrc = guardingNonNull(src);
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108 Object nonNullDest = guardingNonNull(dest);
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109 checkLimits(nonNullSrc, srcPos, nonNullDest, destPos, length);
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110 counter.inc();
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111 ArrayCopyCallNode.arraycopy(nonNullSrc, srcPos, nonNullDest, destPos, length, elementKind);
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112 if (length == 0) {
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113 zeroLengthDynamicCounter.inc();
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114 } else {
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115 nonZeroLengthDynamicCounter.inc();
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116 }
18593
58ea6b98cb09 ArrayCopy: use hotspot stub for checkcastArraycopy.
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117 }
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118
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119 /**
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120 * This intrinsic is useful for the case where we know something statically about one of the
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121 * inputs but not the other.
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122 */
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123 @Snippet
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124 public static void arraycopyPredictedExactIntrinsic(Object src, int srcPos, Object dest, int destPos, int length, @ConstantParameter Kind elementKind, @ConstantParameter SnippetCounter counter) {
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125 Object nonNullSrc = guardingNonNull(src);
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126 Object nonNullDest = guardingNonNull(dest);
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127 KlassPointer srcHub = loadHub(nonNullSrc);
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128 KlassPointer destHub = loadHub(nonNullDest);
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129 if (probability(SLOW_PATH_PROBABILITY, srcHub != destHub)) {
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130 DeoptimizeNode.deopt(DeoptimizationAction.None, DeoptimizationReason.RuntimeConstraint);
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131 }
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132 checkLimits(nonNullSrc, srcPos, nonNullDest, destPos, length);
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133 counter.inc();
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134 ArrayCopyCallNode.arraycopy(nonNullSrc, srcPos, nonNullDest, destPos, length, elementKind);
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135 if (length == 0) {
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136 zeroLengthDynamicCounter.inc();
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137 } else {
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138 nonZeroLengthDynamicCounter.inc();
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139 }
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140 }
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141
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142 @Snippet
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143 public static void arraycopyPredictedObjectWork(Object nonNullSrc, int srcPos, Object nonNullDest, int destPos, int length, KlassPointer objectArrayKlass, @ConstantParameter SnippetCounter counter) {
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144 if (length > 0) {
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145 KlassPointer srcHub = loadHub(nonNullSrc);
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146 KlassPointer destHub = loadHub(nonNullDest);
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147 if (probability(FAST_PATH_PROBABILITY, srcHub == destHub || destHub == objectArrayKlass)) {
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148 counter.inc();
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149 predictedObjectArrayCopyFastPathCounter.inc();
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150 ArrayCopyCallNode.arraycopyObjectKillsAny(nonNullSrc, srcPos, nonNullDest, destPos, length);
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151 } else {
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152 predictedObjectArrayCopySlowPathCounter.inc();
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153 System.arraycopy(nonNullSrc, srcPos, nonNullDest, destPos, length);
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154 }
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155 }
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156 }
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157
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158 /**
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159 * This is the basic template for the full arraycopy checks, including a check that the
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160 * underlying type is really an array type.
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161 */
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162 @Snippet
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163 public static void arraycopySlowPathIntrinsic(Object src, int srcPos, Object dest, int destPos, int length, @ConstantParameter Kind elementKind, @ConstantParameter SnippetInfo slowPath) {
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164 Object nonNullSrc = guardingNonNull(src);
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165 Object nonNullDest = guardingNonNull(dest);
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166 KlassPointer srcHub = loadHub(nonNullSrc);
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167 KlassPointer destHub = loadHub(nonNullDest);
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168 checkArrayType(srcHub);
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169 checkArrayType(destHub);
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170 checkLimits(nonNullSrc, srcPos, nonNullDest, destPos, length);
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171 if (length == 0) {
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172 zeroLengthDynamicCounter.inc();
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173 } else {
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174 nonZeroLengthDynamicCounter.inc();
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175 }
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176 ArrayCopySlowPathNode.arraycopy(nonNullSrc, srcPos, nonNullDest, destPos, length, elementKind, slowPath);
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177 }
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178
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179 @Snippet
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180 public static void checkcastArraycopyWork(Object nonNullSrc, int srcPos, Object nonNullDest, int destPos, int length) {
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181 if (length > 0) {
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182 KlassPointer destKlass = loadHub(nonNullDest);
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183 KlassPointer srcKlass = loadHub(nonNullSrc);
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184 if (probability(SLOW_PATH_PROBABILITY, srcKlass == destKlass)) {
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185 // no storecheck required.
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186 objectCheckcastSameTypeCounter.inc();
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187 ArrayCopyCallNode.arraycopyObjectKillsAny(nonNullSrc, srcPos, nonNullDest, destPos, length);
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188 } else {
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189 KlassPointer destElemKlass = destKlass.readKlassPointer(arrayClassElementOffset(), OBJ_ARRAY_KLASS_ELEMENT_KLASS_LOCATION);
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190 Word superCheckOffset = Word.signed(destElemKlass.readInt(superCheckOffsetOffset(), KLASS_SUPER_CHECK_OFFSET_LOCATION));
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191 objectCheckcastCounter.inc();
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192 int copiedElements = CheckcastArrayCopyCallNode.checkcastArraycopy(nonNullSrc, srcPos, nonNullDest, destPos, length, superCheckOffset, destElemKlass, false);
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193 if (copiedElements != 0) {
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194 /*
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195 * the checkcast stub doesn't throw the ArrayStoreException, but returns the
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196 * number of copied elements (xor'd with -1).
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197 */
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198 copiedElements ^= -1;
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199 System.arraycopy(nonNullSrc, srcPos + copiedElements, nonNullDest, destPos + copiedElements, length - copiedElements);
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200 }
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201 }
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202 }
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203 }
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204
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205 @Snippet
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206 public static void arraycopyGeneric(Object src, int srcPos, Object dest, int destPos, int length) {
10691
77b83e903703 make use of guardingNonNull node intrinsic
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diff changeset
207 Object nonNullSrc = guardingNonNull(src);
77b83e903703 make use of guardingNonNull node intrinsic
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208 Object nonNullDest = guardingNonNull(dest);
18401
e7ab82e7cc37 Move metaspace pointer handling to hotspot specific WordTypeRewriter.
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diff changeset
209 KlassPointer srcHub = loadHub(nonNullSrc);
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210 KlassPointer destHub = loadHub(nonNullDest);
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diff changeset
211 if (probability(FAST_PATH_PROBABILITY, srcHub.equal(destHub)) && probability(FAST_PATH_PROBABILITY, nonNullSrc != nonNullDest)) {
10436
8c8285e345cc Later lowering of arraycopy.
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parents: 9864
diff changeset
212 int layoutHelper = checkArrayType(srcHub);
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213 final boolean isObjectArray = ((layoutHelper & layoutHelperElementTypePrimitiveInPlace()) == 0);
10637
ba1fbbfac0cd remove null check semantics from LoadHubNode (GRAAL-248)
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parents: 10438
diff changeset
214 checkLimits(nonNullSrc, srcPos, nonNullDest, destPos, length);
9316
5e1465ec46d6 Change the way branch probabilities are injected. Update all snippets.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 9015
diff changeset
215 if (probability(FAST_PATH_PROBABILITY, isObjectArray)) {
8963
63eae4723b18 Creation of snippets for ArrayCopy write barriers
Christos Kotselidis <christos.kotselidis@oracle.com>
parents: 8634
diff changeset
216 genericObjectExactCallCounter.inc();
21463
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217 ArrayCopyCallNode.disjointArraycopy(nonNullSrc, srcPos, nonNullDest, destPos, length, Kind.Object);
8963
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218 } else {
63eae4723b18 Creation of snippets for ArrayCopy write barriers
Christos Kotselidis <christos.kotselidis@oracle.com>
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diff changeset
219 genericPrimitiveCallCounter.inc();
10637
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diff changeset
220 UnsafeArrayCopyNode.arraycopyPrimitive(nonNullSrc, srcPos, nonNullDest, destPos, length, layoutHelper);
8963
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221 }
7902
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diff changeset
222 } else {
21463
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223 SystemArraycopyCounter.inc();
10637
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diff changeset
224 System.arraycopy(nonNullSrc, srcPos, nonNullDest, destPos, length);
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225 }
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226 }
14fedab0419e improved arraycopy and Object.clone snippets
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227
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228 @Fold
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229 private static LocationIdentity getArrayLocation(Kind kind) {
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230 return NamedLocationIdentity.getArrayLocation(kind);
13933
ebd2dfc2b780 use hotspot stubs for primitive arraycopy calls
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231 }
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232
ebd2dfc2b780 use hotspot stubs for primitive arraycopy calls
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233 @Snippet
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234 public static void arraycopyUnrolledWork(Object nonNullSrc, int srcPos, Object nonNullDest, int destPos, @ConstantParameter int length, @ConstantParameter Kind elementKind) {
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235 final int scale = arrayIndexScale(elementKind);
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236 int arrayBaseOffset = arrayBaseOffset(elementKind);
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237 LocationIdentity arrayLocation = getArrayLocation(elementKind);
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238 if (nonNullSrc == nonNullDest && srcPos < destPos) { // bad aliased case
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239 long start = (long) (length - 1) * scale;
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240 long i = start;
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241 ExplodeLoopNode.explodeLoop();
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242 for (int iteration = 0; iteration < length; iteration++) {
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243 if (i >= 0) {
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244 Object a = UnsafeLoadNode.load(nonNullSrc, arrayBaseOffset + i + (long) srcPos * scale, elementKind, arrayLocation);
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245 DirectObjectStoreNode.storeObject(nonNullDest, arrayBaseOffset, i + (long) destPos * scale, a, arrayLocation, elementKind);
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246 i -= scale;
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247 }
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248 }
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249 } else {
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250 long end = (long) length * scale;
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251 long i = 0;
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252 ExplodeLoopNode.explodeLoop();
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253 for (int iteration = 0; iteration < length; iteration++) {
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254 if (i < end) {
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255 Object a = UnsafeLoadNode.load(nonNullSrc, arrayBaseOffset + i + (long) srcPos * scale, elementKind, arrayLocation);
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256 DirectObjectStoreNode.storeObject(nonNullDest, arrayBaseOffset, i + (long) destPos * scale, a, arrayLocation, elementKind);
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257 i += scale;
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258 }
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259 }
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260 }
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261 }
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262
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263 private static final SnippetCounter.Group checkCounters = SnippetCounters.getValue() ? new SnippetCounter.Group("System.arraycopy checkInputs") : null;
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225002aba5a5 added new macro node facility, removed ArrayCopyIntrinsificationPhase
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264 private static final SnippetCounter checkSuccessCounter = new SnippetCounter(checkCounters, "checkSuccess", "checkSuccess");
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265 private static final SnippetCounter checkAIOOBECounter = new SnippetCounter(checkCounters, "checkAIOOBE", "checkAIOOBE");
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266
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267 private static final SnippetCounter.Group counters = SnippetCounters.getValue() ? new SnippetCounter.Group("System.arraycopy") : null;
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268
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58ea6b98cb09 ArrayCopy: use hotspot stub for checkcastArraycopy.
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269 private static final SnippetCounter objectCheckcastCounter = new SnippetCounter(counters, "Object[]", "arraycopy for non-exact Object[] arrays");
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270 private static final SnippetCounter objectCheckcastSameTypeCounter = new SnippetCounter(counters, "Object[]", "arraycopy call for src.klass == dest.klass Object[] arrays");
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271 private static final SnippetCounter predictedObjectArrayCopySlowPathCounter = new SnippetCounter(counters, "Object[]", "used System.arraycopy slow path for predicted Object[] arrays");
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272 private static final SnippetCounter predictedObjectArrayCopyFastPathCounter = new SnippetCounter(counters, "Object[]", "used oop_arraycopy for predicted Object[] arrays");
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273
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274 private static final EnumMap<Kind, SnippetCounter> arraycopyCallCounters = new EnumMap<>(Kind.class);
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275 private static final EnumMap<Kind, SnippetCounter> arraycopyCounters = new EnumMap<>(Kind.class);
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276
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277 static void createArraycopyCounter(Kind kind) {
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278 arraycopyCallCounters.put(kind, new SnippetCounter(counters, kind + "[]", "arraycopy call for " + kind + "[] arrays"));
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279 arraycopyCounters.put(kind, new SnippetCounter(counters, kind + "[]", "inline arraycopy for " + kind + "[] arrays"));
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280 }
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39076a984c33 lower arraycopy calls later and support unchecked object arraycopy
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281
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282 static {
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283 createArraycopyCounter(Kind.Byte);
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284 createArraycopyCounter(Kind.Boolean);
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285 createArraycopyCounter(Kind.Char);
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286 createArraycopyCounter(Kind.Short);
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287 createArraycopyCounter(Kind.Int);
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288 createArraycopyCounter(Kind.Long);
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289 createArraycopyCounter(Kind.Float);
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290 createArraycopyCounter(Kind.Double);
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291 createArraycopyCounter(Kind.Object);
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292 }
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293
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294 private static final SnippetCounter genericPrimitiveCallCounter = new SnippetCounter(counters, "genericPrimitive", "generic arraycopy snippet for primitive arrays");
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295 private static final SnippetCounter genericObjectExactCallCounter = new SnippetCounter(counters, "genericObjectExact", "generic arraycopy snippet for special object arrays");
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296 private static final SnippetCounter SystemArraycopyCounter = new SnippetCounter(counters, "genericObject", "call to System.arraycopy");
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297
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298 private static final SnippetCounter.Group lengthCounters = SnippetCounters.getValue() ? new SnippetCounter.Group("System.arraycopy 0-length checks") : null;
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299
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300 private static final SnippetCounter zeroLengthStaticCounter = new SnippetCounter(lengthCounters, "0-lengthcopy static", "arraycopy where the length is statically 0");
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301 private static final SnippetCounter zeroLengthDynamicCounter = new SnippetCounter(lengthCounters, "0-lengthcopy dynamically", "arraycopy where the length is dynamically 0");
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302 private static final SnippetCounter nonZeroLengthDynamicCounter = new SnippetCounter(lengthCounters, "non-0-lengthcopy dynamically", "arraycopy where the length is dynamically not zero");
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303
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304 public static class Templates extends SnippetTemplate.AbstractTemplates {
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305
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306 public Templates(HotSpotProviders providers, TargetDescription target) {
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307 super(providers, providers.getSnippetReflection(), target);
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308 }
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309
21543
93c50cefb9e8 moved GraalInternalError to com.oracle.jvmci.common and renamed it to JVMCIError (JBS:GRAAL-53)
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310 private ResolvedJavaMethod originalArraycopy() throws JVMCIError {
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311 if (originalArraycopy == null) {
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diff changeset
312 Method method;
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313 try {
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314 method = System.class.getDeclaredMethod("arraycopy", Object.class, int.class, Object.class, int.class, int.class);
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315 } catch (NoSuchMethodException | SecurityException e) {
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93c50cefb9e8 moved GraalInternalError to com.oracle.jvmci.common and renamed it to JVMCIError (JBS:GRAAL-53)
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316 throw new JVMCIError(e);
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317 }
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318 originalArraycopy = providers.getMetaAccess().lookupJavaMethod(method);
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319 }
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320 return originalArraycopy;
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321 }
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322
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323 private ResolvedJavaMethod originalArraycopy;
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324
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325 private final SnippetInfo checkcastArraycopyWorkSnippet = snippet("checkcastArraycopyWork");
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326 private final SnippetInfo arraycopyGenericSnippet = snippet("arraycopyGeneric");
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327
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328 private final SnippetInfo arraycopySlowPathIntrinsicSnippet = snippet("arraycopySlowPathIntrinsic");
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329 private final SnippetInfo arraycopyExactIntrinsicSnippet = snippet("arraycopyExactIntrinsic");
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330 private final SnippetInfo arraycopyZeroLengthIntrinsicSnippet = snippet("arraycopyZeroLengthIntrinsic");
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331 private final SnippetInfo arraycopyPredictedExactIntrinsicSnippet = snippet("arraycopyPredictedExactIntrinsic");
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332 private final SnippetInfo arraycopyPredictedObjectWorkSnippet = snippet("arraycopyPredictedObjectWork");
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333
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334 private final SnippetInfo arraycopyUnrolledWorkSnippet = snippet("arraycopyUnrolledWork");
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335
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336 protected SnippetInfo snippet(String methodName) {
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337 SnippetInfo info = snippet(ArrayCopySnippets.class, methodName, LocationIdentity.any());
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338 info.setOriginalMethod(originalArraycopy());
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339 return info;
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340 }
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341
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342 public static Kind selectComponentKind(BasicArrayCopyNode arraycopy) {
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343 return selectComponentKind(arraycopy, true);
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344 }
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345
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346 public static Kind selectComponentKind(BasicArrayCopyNode arraycopy, boolean exact) {
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347 ResolvedJavaType srcType = StampTool.typeOrNull(arraycopy.getSource().stamp());
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348 ResolvedJavaType destType = StampTool.typeOrNull(arraycopy.getDestination().stamp());
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349
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350 if (srcType == null || !srcType.isArray() || destType == null || !destType.isArray()) {
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351 if (!exact) {
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352 Kind component = getComponentKind(srcType);
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353 if (component != null) {
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354 return component;
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355 }
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356 return getComponentKind(destType);
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357 }
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358 return null;
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359 }
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360 if (exact) {
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361 if (!destType.getComponentType().isAssignableFrom(srcType.getComponentType())) {
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362 return null;
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363 }
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364 if (!arraycopy.isExact()) {
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365 return null;
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366 }
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367 }
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368 return srcType.getComponentType().getKind();
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369 }
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370
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371 private static Kind getComponentKind(ResolvedJavaType type) {
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372 if (type != null && type.isArray()) {
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373 return type.getComponentType().getKind();
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374 }
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375 return null;
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376 }
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377
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378 private static boolean shouldUnroll(ValueNode length) {
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379 return length.isConstant() && length.asJavaConstant().asInt() <= 8 && length.asJavaConstant().asInt() != 0;
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380 }
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381
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382 private static void unrollFixedLengthLoop(StructuredGraph snippetGraph, int length, LoweringTool tool) {
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383 ParameterNode lengthParam = snippetGraph.getParameter(4);
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384 if (lengthParam != null) {
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385 snippetGraph.replaceFloating(lengthParam, ConstantNode.forInt(length, snippetGraph));
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386 }
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387 // the canonicalization before loop unrolling is needed to propagate the length into
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388 // additions, etc.
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389 PhaseContext context = new PhaseContext(tool.getMetaAccess(), tool.getConstantReflection(), tool.getLowerer(), tool.getReplacements(), tool.getStampProvider());
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390 new CanonicalizerPhase().apply(snippetGraph, context);
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391 new LoopFullUnrollPhase(new CanonicalizerPhase()).apply(snippetGraph, context);
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392 new CanonicalizerPhase().apply(snippetGraph, context);
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393 }
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394
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395 void unrollSnippet(final LoweringTool tool, StructuredGraph snippetGraph, ArrayCopyNode arraycopy) {
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396 if (shouldUnroll(arraycopy.getLength())) {
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397 final StructuredGraph copy = snippetGraph;
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398 try (Scope s = Debug.scope("ArrayCopySnippetSpecialization", snippetGraph.method())) {
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399 unrollFixedLengthLoop(copy, arraycopy.getLength().asJavaConstant().asInt(), tool);
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400 } catch (Throwable e) {
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401 throw Debug.handle(e);
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402 }
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403 }
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404 }
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405
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406 public void lower(ArrayCopyNode arraycopy, LoweringTool tool) {
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407 Kind componentKind = selectComponentKind(arraycopy);
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408 SnippetInfo snippetInfo = null;
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409 SnippetInfo slowPathSnippetInfo = null;
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410
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411 if (arraycopy.getLength().isConstant() && arraycopy.getLength().asJavaConstant().asLong() == 0) {
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412 snippetInfo = arraycopyZeroLengthIntrinsicSnippet;
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413 } else if (arraycopy.isExact()) {
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414 snippetInfo = arraycopyExactIntrinsicSnippet;
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415 if (shouldUnroll(arraycopy.getLength())) {
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416 snippetInfo = arraycopySlowPathIntrinsicSnippet;
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417 slowPathSnippetInfo = arraycopyUnrolledWorkSnippet;
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418 }
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419 } else {
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420 if (componentKind == Kind.Object) {
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421 ResolvedJavaType srcType = StampTool.typeOrNull(arraycopy.getSource().stamp());
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422 ResolvedJavaType destType = StampTool.typeOrNull(arraycopy.getDestination().stamp());
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423 ResolvedJavaType srcComponentType = srcType == null ? null : srcType.getComponentType();
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424 ResolvedJavaType destComponentType = destType == null ? null : destType.getComponentType();
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425 if (srcComponentType != null && destComponentType != null && !srcComponentType.isPrimitive() && !destComponentType.isPrimitive()) {
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diff changeset
426 snippetInfo = arraycopySlowPathIntrinsicSnippet;
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427 slowPathSnippetInfo = checkcastArraycopyWorkSnippet;
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428 /*
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429 * Because this snippet has to use Sysytem.arraycopy as a slow path, we must
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430 * pretend to kill any() so clear the componentKind.
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431 */
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432 componentKind = null;
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433 }
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434 }
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435 if (componentKind == null && snippetInfo == null) {
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diff changeset
436 Kind predictedKind = selectComponentKind(arraycopy, false);
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diff changeset
437 if (predictedKind != null) {
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diff changeset
438 /*
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439 * At least one array is of a known type requiring no store checks, so
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diff changeset
440 * assume the other is of the same type. Generally this is working around
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441 * deficiencies in our propation of type information.
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442 */
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443 componentKind = predictedKind;
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diff changeset
444 if (predictedKind == Kind.Object) {
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diff changeset
445 snippetInfo = arraycopySlowPathIntrinsicSnippet;
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diff changeset
446 slowPathSnippetInfo = arraycopyPredictedObjectWorkSnippet;
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diff changeset
447 componentKind = null;
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448 } else {
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diff changeset
449 snippetInfo = arraycopyPredictedExactIntrinsicSnippet;
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450 }
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451 }
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452 }
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diff changeset
453 if (snippetInfo == null) {
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diff changeset
454 snippetInfo = arraycopyGenericSnippet;
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455 }
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456 }
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diff changeset
457 Arguments args = new Arguments(snippetInfo, arraycopy.graph().getGuardsStage(), tool.getLoweringStage());
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diff changeset
458 args.add("src", arraycopy.getSource());
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diff changeset
459 args.add("srcPos", arraycopy.getSourcePosition());
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diff changeset
460 args.add("dest", arraycopy.getDestination());
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diff changeset
461 args.add("destPos", arraycopy.getDestinationPosition());
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462 args.add("length", arraycopy.getLength());
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463 if (snippetInfo == arraycopySlowPathIntrinsicSnippet) {
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464 args.addConst("elementKind", componentKind != null ? componentKind : Kind.Illegal);
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465 args.addConst("slowPath", slowPathSnippetInfo);
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466 } else if (snippetInfo == arraycopyExactIntrinsicSnippet || snippetInfo == arraycopyPredictedExactIntrinsicSnippet) {
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467 assert componentKind != null;
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468 args.addConst("elementKind", componentKind);
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469 args.addConst("counter", arraycopyCallCounters.get(componentKind));
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470 }
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471 instantiate(args, arraycopy);
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472 }
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473
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474 public void lower(ArrayCopySlowPathNode arraycopy, LoweringTool tool) {
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475 StructuredGraph graph = arraycopy.graph();
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476 if (!graph.getGuardsStage().areFrameStatesAtDeopts()) {
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477 // Can't be lowered yet
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478 return;
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479 }
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480 SnippetInfo snippetInfo = arraycopy.getSnippet();
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481 Arguments args = new Arguments(snippetInfo, graph.getGuardsStage(), tool.getLoweringStage());
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482 args.add("nonNullSrc", arraycopy.getSource());
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483 args.add("srcPos", arraycopy.getSourcePosition());
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484 args.add("nonNullDest", arraycopy.getDestination());
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485 args.add("destPos", arraycopy.getDestinationPosition());
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486 if (snippetInfo == arraycopyUnrolledWorkSnippet) {
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487 args.addConst("length", arraycopy.getLength().asJavaConstant().asInt());
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488 args.addConst("elementKind", arraycopy.getElementKind());
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489 } else {
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490 args.add("length", arraycopy.getLength());
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491 }
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492 if (snippetInfo == arraycopyPredictedObjectWorkSnippet) {
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493 HotSpotResolvedObjectType arrayKlass = (HotSpotResolvedObjectType) tool.getMetaAccess().lookupJavaType(Object[].class);
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494 ValueNode objectArrayKlass = ConstantNode.forConstant(KlassPointerStamp.klassNonNull(), arrayKlass.klass(), tool.getMetaAccess(), arraycopy.graph());
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495 args.add("objectArrayKlass", objectArrayKlass);
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496 args.addConst("counter", arraycopyCallCounters.get(Kind.Object));
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497 }
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498 instantiate(args, arraycopy);
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499 }
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500
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501 /**
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502 * Instantiate the snippet template and fix up the FrameState of any Invokes of
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503 * System.arraycopy and propagate the captured bci in the ArrayCopySlowPathNode.
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504 *
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505 * @param args
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506 * @param arraycopy
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507 */
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508 private void instantiate(Arguments args, BasicArrayCopyNode arraycopy) {
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509 StructuredGraph graph = arraycopy.graph();
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510 SnippetTemplate template = template(args);
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511 Map<Node, Node> replacements = template.instantiate(providers.getMetaAccess(), arraycopy, SnippetTemplate.DEFAULT_REPLACER, args);
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512 for (Node originalNode : replacements.keySet()) {
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513 if (originalNode instanceof Invoke) {
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514 Invoke invoke = (Invoke) replacements.get(originalNode);
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515 assert invoke.asNode().graph() == graph;
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516 CallTargetNode call = invoke.callTarget();
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517
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518 if (!call.targetMethod().equals(originalArraycopy)) {
21543
93c50cefb9e8 moved GraalInternalError to com.oracle.jvmci.common and renamed it to JVMCIError (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
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519 throw new JVMCIError("unexpected invoke %s in snippet", call.targetMethod());
21463
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520 }
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521 // Here we need to fix the bci of the invoke
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522 InvokeNode newInvoke = graph.add(new InvokeNode(invoke.callTarget(), arraycopy.getBci()));
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523 if (arraycopy.stateDuring() != null) {
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524 newInvoke.setStateDuring(arraycopy.stateDuring());
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525 } else {
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526 assert arraycopy.stateAfter() != null;
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527 newInvoke.setStateAfter(arraycopy.stateAfter());
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528 }
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529 graph.replaceFixedWithFixed((InvokeNode) invoke.asNode(), newInvoke);
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530 } else if (originalNode instanceof ArrayCopySlowPathNode) {
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531 ArrayCopySlowPathNode slowPath = (ArrayCopySlowPathNode) replacements.get(originalNode);
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532 assert arraycopy.stateAfter() != null;
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533 slowPath.setStateAfter(arraycopy.stateAfter());
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534 slowPath.setBci(arraycopy.getBci());
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535 }
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536 }
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537 }
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538 }
3733
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
539 }