Mercurial > hg > truffle
annotate graal/com.oracle.jvmci.hotspot/src/com/oracle/jvmci/hotspot/HotSpotReferenceMap.java @ 21687:afea1d08c393
Merge with df4579cb9503128c646bd04e66646ccfa7faf25f
author | Michael Van De Vanter <michael.van.de.vanter@oracle.com> |
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date | Tue, 02 Jun 2015 18:32:11 -0700 |
parents | 48c1ebd24120 |
children | b9f9b8af17ff |
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1 /* |
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2 * Copyright (c) 2009, 2014, 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.jvmci.hotspot; |
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24 |
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25 import java.util.*; |
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26 |
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27 import com.oracle.jvmci.code.CodeUtil.RefMapFormatter; |
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28 import com.oracle.jvmci.code.*; |
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29 import com.oracle.jvmci.common.*; |
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30 import com.oracle.jvmci.meta.*; |
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31 |
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32 public final class HotSpotReferenceMap extends ReferenceMap { |
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33 |
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34 static final int OOP64 = 0b1010; |
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35 static final int OOP32 = 0b01; |
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36 static final int NARROW_LOW = OOP32; |
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37 static final int NARROW_HIGH = OOP32 << 2; |
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38 static final int NARROW_BOTH = NARROW_LOW | NARROW_HIGH; |
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39 |
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40 private enum MapEntry { |
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41 NoReference(0), |
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42 WideOop(OOP64), |
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43 NarrowOopLowerHalf(NARROW_LOW), |
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44 NarrowOopUpperHalf(NARROW_HIGH), |
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45 TwoNarrowOops(NARROW_BOTH), |
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46 Illegal(-1); |
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47 |
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48 MapEntry(int pattern) { |
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49 this.pattern = pattern; |
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50 } |
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51 |
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52 final int pattern; |
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53 |
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54 /** |
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55 * Create enum values from OopMap. |
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56 * <p> |
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57 * These bits can have the following values (MSB first): |
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58 * |
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59 * <pre> |
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60 * 0000 - contains no references |
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61 * 1010 - contains a wide oop |
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62 * 0001 - contains a narrow oop in the lower half |
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63 * 0101 - contains a narrow oop in the upper half |
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64 * 0101 - contains two narrow oops |
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65 * </pre> |
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66 * |
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67 * @see HotSpotReferenceMap#registerRefMap |
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68 * @see HotSpotReferenceMap#frameRefMap |
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69 */ |
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70 static MapEntry getFromBits(int idx, HotSpotOopMap set) { |
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71 int n = set.get(idx); |
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72 switch (n) { |
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73 case 0: |
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74 return NoReference; |
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75 case OOP64: |
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76 return WideOop; |
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77 case NARROW_LOW: |
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78 return NarrowOopLowerHalf; |
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79 case NARROW_HIGH: |
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80 return NarrowOopUpperHalf; |
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81 case NARROW_BOTH: |
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82 return TwoNarrowOops; |
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83 default: |
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84 return Illegal; |
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85 } |
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86 } |
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87 |
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88 String toBitString() { |
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89 int bits = toBit(this); |
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90 if (bits == -1) { |
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91 return "---"; |
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92 } |
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93 return String.format("%3s", Integer.toBinaryString(bits)).replace(' ', '0'); |
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94 } |
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95 |
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96 static int toBit(MapEntry type) { |
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97 return type.pattern; |
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98 } |
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99 } |
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100 |
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101 /** |
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102 * A specialized bit set that represents both wide and narrow oops in an efficient manner. The |
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103 * map consists of 4 bit entries that represent 8 bytes of memory. |
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104 * |
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105 */ |
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106 class HotSpotOopMap implements Cloneable { |
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107 |
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108 /** |
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109 * Each entry is 4 bits long and covers 8 bytes of memory. |
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110 */ |
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111 private static final int BITS_PER_ENTRY = 4; |
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112 private static final int BITS_PER_ELEMENT = 64; |
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113 |
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114 public HotSpotOopMap(int i) { |
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115 words = new long[(i * BITS_PER_ENTRY + BITS_PER_ELEMENT) / BITS_PER_ELEMENT]; |
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116 } |
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117 |
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118 public HotSpotOopMap(HotSpotOopMap other) { |
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119 words = other.words.clone(); |
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120 } |
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121 |
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122 private long[] words; |
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123 |
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124 private int get(int i) { |
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125 return getEntry(i); |
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126 } |
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127 |
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128 public void or(HotSpotOopMap src) { |
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129 if (words.length < src.words.length) { |
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130 long[] newWords = new long[src.words.length]; |
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131 System.arraycopy(src.words, 0, newWords, 0, src.words.length); |
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132 for (int i = 0; i < words.length; i++) { |
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133 newWords[i] |= words[i]; |
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134 } |
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135 words = newWords; |
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136 } else { |
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137 for (int i = 0; i < src.words.length; i++) { |
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138 words[i] |= src.words[i]; |
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139 } |
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140 } |
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141 } |
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142 |
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143 private void setOop(int regIdx) { |
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144 setEntry(regIdx, OOP64); |
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145 } |
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146 |
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147 public int size() { |
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148 return words.length * BITS_PER_ELEMENT / BITS_PER_ENTRY; |
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149 } |
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150 |
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151 @Override |
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152 public HotSpotOopMap clone() { |
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153 return new HotSpotOopMap(this); |
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154 } |
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155 |
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156 private void setNarrowOop(int offset) { |
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157 setNarrowEntry(offset, OOP32); |
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158 } |
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159 |
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160 private void setEntry(int regIdx, int value) { |
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161 assert regIdx % 2 == 0 : "must be alinged"; |
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162 int bitIndex = (regIdx >> 1) * BITS_PER_ENTRY; |
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163 int wordIndex = bitIndex / BITS_PER_ELEMENT; |
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164 int shift = bitIndex - wordIndex * BITS_PER_ELEMENT; |
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165 if (wordIndex >= words.length) { |
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166 if (value == 0) { |
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167 // Nothing to do since bits are clear |
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168 return; |
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169 } |
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170 words = Arrays.copyOf(words, wordIndex + 1); |
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171 } |
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172 assert verifyUpdate(this, this); |
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173 long orig = words[wordIndex]; |
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174 words[wordIndex] = (orig & (~(0b1111L << shift))) | ((long) value << shift); |
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175 assert get(regIdx / 2) == value; |
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176 assert verifyUpdate(this, this); |
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177 } |
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178 |
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179 private void setNarrowEntry(int offset, int value) { |
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180 int regIdx = offset >> 1; |
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181 boolean low = offset % 2 == 0; |
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182 int bitIndex = regIdx * BITS_PER_ENTRY; |
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183 int wordIndex = bitIndex / BITS_PER_ELEMENT; |
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184 int shift = bitIndex - wordIndex * BITS_PER_ELEMENT; |
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185 if (wordIndex >= words.length) { |
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186 if (value == 0) { |
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187 // Nothing to do since bits are clear |
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188 return; |
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189 } |
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190 words = Arrays.copyOf(words, wordIndex + 1); |
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191 } |
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192 long originalValue = words[wordIndex]; |
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193 int current = ((int) (originalValue >> shift)) & 0b1111; |
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194 if (current == OOP64) { |
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195 current = 0; |
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196 } |
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197 long newValue; |
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198 if (value != 0) { |
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199 newValue = current | (low ? value : (value << 2)); |
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200 } else { |
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201 newValue = current & (low ? 0b1100 : 0b0011); |
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202 } |
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203 long masked = originalValue & (~(0b1111L << shift)); |
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204 words[wordIndex] = masked | (newValue << shift); |
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205 assert verifyUpdate(this, this); |
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206 } |
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207 |
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208 private int getEntry(int regIdx) { |
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209 int bitIndex = regIdx * BITS_PER_ENTRY; |
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210 int wordIndex = bitIndex / BITS_PER_ELEMENT; |
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211 int shift = bitIndex - wordIndex * BITS_PER_ELEMENT; |
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212 return ((int) (words[wordIndex] >>> shift)) & 0b1111; |
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213 } |
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214 |
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215 @Override |
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216 public boolean equals(Object other) { |
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217 if (this == other) { |
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218 return true; |
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219 } |
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220 |
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221 if (other instanceof HotSpotOopMap) { |
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222 HotSpotOopMap otherMap = (HotSpotOopMap) other; |
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223 int limit = Math.min(words.length, otherMap.words.length); |
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224 for (int i = 0; i < limit; i++) { |
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225 if (words[i] != otherMap.words[i]) { |
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226 return false; |
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227 } |
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228 } |
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229 for (int i = limit; i < words.length; i++) { |
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230 if (words[i] != 0) { |
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231 return false; |
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232 } |
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233 } |
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234 for (int i = limit; i < otherMap.words.length; i++) { |
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235 if (otherMap.words[i] != 0) { |
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236 return false; |
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237 } |
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238 } |
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239 return true; |
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240 } |
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241 return false; |
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242 } |
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243 |
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244 @Override |
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245 public int hashCode() { |
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246 long h = 1234; |
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247 for (int i = words.length; --i >= 0;) { |
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248 h ^= words[i] * (i + 1); |
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249 } |
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250 return (int) ((h >> 32) ^ h); |
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251 } |
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252 |
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253 @Override |
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254 public String toString() { |
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255 int count = 0; |
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256 StringBuilder sb = new StringBuilder(); |
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257 sb.append("["); |
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258 for (int idx = 0; idx < size(); idx++) { |
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259 MapEntry dstType = MapEntry.getFromBits(idx, this); |
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260 if (dstType == MapEntry.NoReference) { |
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261 continue; |
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262 } |
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263 if (count > 0) { |
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264 sb.append(", "); |
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265 } |
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266 if (dstType == MapEntry.Illegal) { |
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267 int value = get(idx); |
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268 sb.append("0x"); |
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269 sb.append(Integer.toHexString(value)); |
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270 } else { |
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271 sb.append(idx); |
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272 sb.append(':'); |
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273 sb.append(dstType); |
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274 } |
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275 count++; |
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276 } |
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277 sb.append("]"); |
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278 return sb.toString(); |
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279 } |
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280 } |
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281 |
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282 /** |
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283 * Contains 3 bits per scalar register, and n*3 bits per n-word vector register (e.g., on a |
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284 * 64-bit system, a 256-bit vector register requires 12 reference map bits). |
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285 * <p> |
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286 * These bits can have the following values (LSB first): |
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287 * |
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288 * <pre> |
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289 * 000 - contains no references |
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290 * 100 - contains a wide oop |
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291 * 110 - contains a narrow oop in the lower half |
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292 * 101 - contains a narrow oop in the upper half |
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293 * 111 - contains two narrow oops |
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294 * </pre> |
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295 */ |
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296 private final HotSpotOopMap registerRefMap; |
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297 |
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298 /** |
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299 * Contains 3 bits per stack word. |
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300 * <p> |
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301 * These bits can have the following values (LSB first): |
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302 * |
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303 * <pre> |
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304 * 000 - contains no references |
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305 * 100 - contains a wide oop |
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306 * 110 - contains a narrow oop in the lower half |
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307 * 101 - contains a narrow oop in the upper half |
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308 * 111 - contains two narrow oops |
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309 * </pre> |
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310 */ |
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311 private final HotSpotOopMap frameRefMap; |
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312 |
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313 private final TargetDescription target; |
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314 |
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315 public HotSpotReferenceMap(int registerCount, int frameSlotCount, TargetDescription target) { |
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316 if (registerCount > 0) { |
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317 this.registerRefMap = new HotSpotOopMap(registerCount); |
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318 } else { |
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319 this.registerRefMap = null; |
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320 } |
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321 this.frameRefMap = new HotSpotOopMap(frameSlotCount); |
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322 this.target = target; |
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323 } |
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324 |
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325 private HotSpotReferenceMap(HotSpotReferenceMap other) { |
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326 this.registerRefMap = other.registerRefMap.clone(); |
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327 this.frameRefMap = other.frameRefMap.clone(); |
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328 this.target = other.target; |
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329 } |
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330 |
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331 @Override |
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332 public ReferenceMap clone() { |
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333 return new HotSpotReferenceMap(this); |
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334 } |
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335 |
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336 // setters |
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337 @Override |
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338 public void setRegister(int idx, LIRKind kind) { |
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339 set(registerRefMap, idx * 2, kind); |
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340 } |
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341 |
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342 @Override |
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343 public void setStackSlot(int offset, LIRKind kind) { |
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344 assert offset % bytesPerElement(kind) == 0 : "unaligned value in ReferenceMap"; |
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345 set(frameRefMap, offset / 4, kind); |
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346 } |
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347 |
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348 private void set(HotSpotOopMap refMap, int index, LIRKind kind) { |
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349 if (kind.isDerivedReference()) { |
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350 throw new JVMCIError("derived reference cannot be inserted in ReferenceMap"); |
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351 } |
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352 |
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353 int bytesPerElement = bytesPerElement(kind); |
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354 int length = kind.getPlatformKind().getVectorLength(); |
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355 if (bytesPerElement == 8) { |
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356 for (int i = 0; i < length; i++) { |
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357 if (kind.isReference(i)) { |
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358 refMap.setOop(index + i * 2); |
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359 } |
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360 } |
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361 } else if (bytesPerElement == 4) { |
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362 for (int i = 0; i < length; i++) { |
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363 if (kind.isReference(i)) { |
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364 refMap.setNarrowOop(index + i); |
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365 } |
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366 } |
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367 } else { |
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368 assert kind.isValue() : "unknown reference kind " + kind; |
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369 } |
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370 } |
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371 |
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fix handling of uncompressed vector oopmaps
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372 private int bytesPerElement(LIRKind kind) { |
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373 PlatformKind platformKind = kind.getPlatformKind(); |
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374 return target.getSizeInBytes(platformKind) / platformKind.getVectorLength(); |
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375 } |
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376 |
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377 public HotSpotOopMap getFrameMap() { |
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378 return frameRefMap == null ? null : (HotSpotOopMap) frameRefMap.clone(); |
18663 | 379 } |
380 | |
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381 public HotSpotOopMap getRegisterMap() { |
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382 return registerRefMap == null ? null : (HotSpotOopMap) registerRefMap.clone(); |
18663 | 383 } |
384 | |
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385 static MapEntry[] entries(HotSpotOopMap fixedMap) { |
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386 MapEntry[] result = new MapEntry[fixedMap.size()]; |
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387 for (int idx = 0; idx < fixedMap.size(); idx++) { |
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388 MapEntry dstType = MapEntry.getFromBits(idx, fixedMap); |
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389 result[idx] = dstType; |
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390 } |
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391 return result; |
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392 } |
18609
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Add ReferenceMap.mergeMaps().
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393 |
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394 private static boolean verifyUpdate(HotSpotOopMap dst, HotSpotOopMap src) { |
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395 return verifyUpdate(dst, src, true); |
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396 } |
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397 |
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398 private static boolean verifyUpdate(HotSpotOopMap dst, HotSpotOopMap src, boolean doAssert) { |
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399 for (int idx = 0; idx < Math.min(src.size(), dst.size()); idx++) { |
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400 if (!verifyUpdateEntry(idx, dst, src, doAssert)) { |
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401 return false; |
18609
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402 } |
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403 } |
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404 return true; |
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405 } |
18609
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406 |
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407 private static boolean verifyUpdateEntry(int idx, HotSpotOopMap dst, HotSpotOopMap src, boolean doAssert) { |
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408 MapEntry dstType = MapEntry.getFromBits(idx, dst); |
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409 MapEntry srcType = MapEntry.getFromBits(idx, src); |
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410 |
20981
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411 if (dstType == MapEntry.Illegal || srcType == MapEntry.Illegal) { |
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412 assert !doAssert : String.format("Illegal RefMap bit pattern: %s (0b%s), %s (0b%s)", dstType, dstType.toBitString(), srcType, srcType.toBitString()); |
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413 return false; |
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414 } |
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415 switch (dstType) { |
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416 case NoReference: |
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417 return true; |
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418 case WideOop: |
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419 switch (srcType) { |
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420 case NoReference: |
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421 case WideOop: |
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422 return true; |
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423 default: |
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424 assert false : String.format("Illegal RefMap combination: %s (0b%s), %s (0b%s)", dstType, dstType.toBitString(), srcType, srcType.toBitString()); |
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425 return false; |
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426 } |
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427 case TwoNarrowOops: |
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428 case NarrowOopLowerHalf: |
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429 case NarrowOopUpperHalf: |
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430 switch (srcType) { |
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431 case TwoNarrowOops: |
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432 case NarrowOopLowerHalf: |
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433 case NarrowOopUpperHalf: |
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434 case NoReference: |
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|
435 return true; |
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|
436 default: |
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|
437 assert false : String.format("Illegal RefMap combination: %s (0b%s), %s (0b%s)", dstType, dstType.toBitString(), srcType, srcType.toBitString()); |
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|
438 return false; |
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|
439 } |
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|
440 default: |
18609
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Add ReferenceMap.mergeMaps().
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diff
changeset
|
441 return false; |
c7fe48cd8087
Add ReferenceMap.mergeMaps().
Josef Eisl <josef.eisl@jku.at>
parents:
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diff
changeset
|
442 } |
c7fe48cd8087
Add ReferenceMap.mergeMaps().
Josef Eisl <josef.eisl@jku.at>
parents:
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diff
changeset
|
443 } |
c7fe48cd8087
Add ReferenceMap.mergeMaps().
Josef Eisl <josef.eisl@jku.at>
parents:
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diff
changeset
|
444 |
18342
d60dd21329f2
implemented .equals() for CompilationResult and the objects it encapsulates
Doug Simon <doug.simon@oracle.com>
parents:
16114
diff
changeset
|
445 @Override |
d60dd21329f2
implemented .equals() for CompilationResult and the objects it encapsulates
Doug Simon <doug.simon@oracle.com>
parents:
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diff
changeset
|
446 public int hashCode() { |
18349
7aa6180a3486
fixed NullPointerException in HotSpotReferenceMap.equals
Doug Simon <doug.simon@oracle.com>
parents:
18342
diff
changeset
|
447 throw new UnsupportedOperationException(); |
18342
d60dd21329f2
implemented .equals() for CompilationResult and the objects it encapsulates
Doug Simon <doug.simon@oracle.com>
parents:
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diff
changeset
|
448 } |
d60dd21329f2
implemented .equals() for CompilationResult and the objects it encapsulates
Doug Simon <doug.simon@oracle.com>
parents:
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diff
changeset
|
449 |
d60dd21329f2
implemented .equals() for CompilationResult and the objects it encapsulates
Doug Simon <doug.simon@oracle.com>
parents:
16114
diff
changeset
|
450 @Override |
d60dd21329f2
implemented .equals() for CompilationResult and the objects it encapsulates
Doug Simon <doug.simon@oracle.com>
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changeset
|
451 public boolean equals(Object obj) { |
d60dd21329f2
implemented .equals() for CompilationResult and the objects it encapsulates
Doug Simon <doug.simon@oracle.com>
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diff
changeset
|
452 if (this == obj) { |
d60dd21329f2
implemented .equals() for CompilationResult and the objects it encapsulates
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diff
changeset
|
453 return true; |
d60dd21329f2
implemented .equals() for CompilationResult and the objects it encapsulates
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parents:
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diff
changeset
|
454 } |
d60dd21329f2
implemented .equals() for CompilationResult and the objects it encapsulates
Doug Simon <doug.simon@oracle.com>
parents:
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diff
changeset
|
455 if (obj instanceof HotSpotReferenceMap) { |
d60dd21329f2
implemented .equals() for CompilationResult and the objects it encapsulates
Doug Simon <doug.simon@oracle.com>
parents:
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diff
changeset
|
456 HotSpotReferenceMap that = (HotSpotReferenceMap) obj; |
18349
7aa6180a3486
fixed NullPointerException in HotSpotReferenceMap.equals
Doug Simon <doug.simon@oracle.com>
parents:
18342
diff
changeset
|
457 if (this.frameRefMap.equals(that.frameRefMap) && Objects.equals(this.registerRefMap, that.registerRefMap) && this.target.equals(that.target)) { |
18342
d60dd21329f2
implemented .equals() for CompilationResult and the objects it encapsulates
Doug Simon <doug.simon@oracle.com>
parents:
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diff
changeset
|
458 return true; |
d60dd21329f2
implemented .equals() for CompilationResult and the objects it encapsulates
Doug Simon <doug.simon@oracle.com>
parents:
16114
diff
changeset
|
459 } |
d60dd21329f2
implemented .equals() for CompilationResult and the objects it encapsulates
Doug Simon <doug.simon@oracle.com>
parents:
16114
diff
changeset
|
460 } |
d60dd21329f2
implemented .equals() for CompilationResult and the objects it encapsulates
Doug Simon <doug.simon@oracle.com>
parents:
16114
diff
changeset
|
461 return false; |
d60dd21329f2
implemented .equals() for CompilationResult and the objects it encapsulates
Doug Simon <doug.simon@oracle.com>
parents:
16114
diff
changeset
|
462 } |
d60dd21329f2
implemented .equals() for CompilationResult and the objects it encapsulates
Doug Simon <doug.simon@oracle.com>
parents:
16114
diff
changeset
|
463 |
20981
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changeset
|
464 @Override |
13725
8d8732e14447
Refactor reference maps.
Roland Schatz <roland.schatz@oracle.com>
parents:
diff
changeset
|
465 public boolean hasRegisterRefMap() { |
8d8732e14447
Refactor reference maps.
Roland Schatz <roland.schatz@oracle.com>
parents:
diff
changeset
|
466 return registerRefMap != null && registerRefMap.size() > 0; |
8d8732e14447
Refactor reference maps.
Roland Schatz <roland.schatz@oracle.com>
parents:
diff
changeset
|
467 } |
8d8732e14447
Refactor reference maps.
Roland Schatz <roland.schatz@oracle.com>
parents:
diff
changeset
|
468 |
20981
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changeset
|
469 @Override |
13725
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Refactor reference maps.
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parents:
diff
changeset
|
470 public boolean hasFrameRefMap() { |
8d8732e14447
Refactor reference maps.
Roland Schatz <roland.schatz@oracle.com>
parents:
diff
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|
471 return frameRefMap != null && frameRefMap.size() > 0; |
8d8732e14447
Refactor reference maps.
Roland Schatz <roland.schatz@oracle.com>
parents:
diff
changeset
|
472 } |
8d8732e14447
Refactor reference maps.
Roland Schatz <roland.schatz@oracle.com>
parents:
diff
changeset
|
473 |
20981
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Add more efficient implementation of HotSpotReferenceMap
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changeset
|
474 @Override |
14562
45812e05cdb3
Move narrow oop handling in reference maps to hotspot specific code.
Roland Schatz <roland.schatz@oracle.com>
parents:
13936
diff
changeset
|
475 public void appendRegisterMap(StringBuilder sb, RefMapFormatter formatter) { |
20981
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|
476 for (int idx = 0; idx < registerRefMap.size(); idx++) { |
92fc95e8667d
Add more efficient implementation of HotSpotReferenceMap
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changeset
|
477 MapEntry dstType = MapEntry.getFromBits(idx, registerRefMap); |
92fc95e8667d
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changeset
|
478 if (dstType != MapEntry.NoReference) { |
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|
479 sb.append(' ').append(formatter.formatRegister(idx)).append(':').append(dstType); |
92fc95e8667d
Add more efficient implementation of HotSpotReferenceMap
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
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changeset
|
480 } |
13725
8d8732e14447
Refactor reference maps.
Roland Schatz <roland.schatz@oracle.com>
parents:
diff
changeset
|
481 } |
8d8732e14447
Refactor reference maps.
Roland Schatz <roland.schatz@oracle.com>
parents:
diff
changeset
|
482 } |
8d8732e14447
Refactor reference maps.
Roland Schatz <roland.schatz@oracle.com>
parents:
diff
changeset
|
483 |
20981
92fc95e8667d
Add more efficient implementation of HotSpotReferenceMap
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
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diff
changeset
|
484 @Override |
14562
45812e05cdb3
Move narrow oop handling in reference maps to hotspot specific code.
Roland Schatz <roland.schatz@oracle.com>
parents:
13936
diff
changeset
|
485 public void appendFrameMap(StringBuilder sb, RefMapFormatter formatter) { |
20981
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Add more efficient implementation of HotSpotReferenceMap
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parents:
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diff
changeset
|
486 for (int idx = 0; idx < frameRefMap.size(); idx++) { |
92fc95e8667d
Add more efficient implementation of HotSpotReferenceMap
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changeset
|
487 MapEntry dstType = MapEntry.getFromBits(idx, frameRefMap); |
92fc95e8667d
Add more efficient implementation of HotSpotReferenceMap
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parents:
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diff
changeset
|
488 if (dstType != MapEntry.NoReference) { |
92fc95e8667d
Add more efficient implementation of HotSpotReferenceMap
Tom Rodriguez <tom.rodriguez@oracle.com>
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diff
changeset
|
489 sb.append(' ').append(formatter.formatStackSlot(idx)).append(':').append(dstType); |
92fc95e8667d
Add more efficient implementation of HotSpotReferenceMap
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
18706
diff
changeset
|
490 } |
13725
8d8732e14447
Refactor reference maps.
Roland Schatz <roland.schatz@oracle.com>
parents:
diff
changeset
|
491 } |
8d8732e14447
Refactor reference maps.
Roland Schatz <roland.schatz@oracle.com>
parents:
diff
changeset
|
492 } |
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493 |
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494 @Override |
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495 public String toString() { |
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496 StringBuilder sb = new StringBuilder(); |
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497 if (registerRefMap != null) { |
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498 sb.append("Registers = "); |
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499 sb.append(registerRefMap); |
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500 } |
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501 sb.append("Stack = "); |
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502 sb.append(frameRefMap); |
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503 return sb.toString(); |
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504 } |
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505 |
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506 public void verify() { |
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507 assert verifyUpdate(frameRefMap, frameRefMap); |
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508 assert registerRefMap == null || verifyUpdate(registerRefMap, registerRefMap); |
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509 } |
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510 } |