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annotate truffle/com.oracle.truffle.api.profiles/src/com/oracle/truffle/api/profiles/PrimitiveValueProfile.java @ 22504:d80a5ff56f51

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Storing the profiling enabled information in a static field; checking it only once; shielding against missing method in the TruffleRuntime interface
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Thu, 17 Dec 2015 13:45:37 +0100
parents 828c67903db2
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 2014, 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. Oracle designates this
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8 * particular file as subject to the "Classpath" exception as provided
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9 * by Oracle in the LICENSE file that accompanied this code.
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10 *
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11 * This code is distributed in the hope that it will be useful, but WITHOUT
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 * version 2 for more details (a copy is included in the LICENSE file that
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15 * accompanied this code).
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16 *
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17 * You should have received a copy of the GNU General Public License version
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18 * 2 along with this work; if not, write to the Free Software Foundation,
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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20 *
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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22 * or visit www.oracle.com if you need additional information or have any
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23 * questions.
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24 */
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25 package com.oracle.truffle.api.profiles;
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26
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27 import java.util.Objects;
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28
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29 import com.oracle.truffle.api.CompilerDirectives;
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30 import com.oracle.truffle.api.CompilerDirectives.CompilationFinal;
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31
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32 /**
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33 * <p>
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34 * Represents a {@link ValueProfile} that speculates on the primitive equality or object identity of
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35 * values. Note that for {@code float} and {@code double} values we compare primitive equality via
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36 * {@link Float#floatToRawIntBits} and {@link Double#doubleToRawLongBits}, so that for example
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37 * {@code -0.0} is not considered the same as {@code 0.0}, even though primitive equality would
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38 * normally say that it was.
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39 * </p>
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40 *
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41 * {@inheritDoc}
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42 */
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43 public abstract class PrimitiveValueProfile extends ValueProfile {
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44
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45 PrimitiveValueProfile() {
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46 }
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47
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48 @Override
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49 public abstract <T> T profile(T value);
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50
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51 public abstract byte profile(byte value);
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53 public abstract short profile(short value);
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54
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55 public abstract int profile(int value);
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56
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57 public abstract long profile(long value);
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58
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59 public abstract float profile(float value);
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60
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61 public abstract double profile(double value);
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62
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63 public abstract boolean profile(boolean value);
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64
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65 public abstract char profile(char value);
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66
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67 /**
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68 * Returns a {@link PrimitiveValueProfile} that speculates on the primitive equality or object
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69 * identity of a value.
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70 */
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71 public static PrimitiveValueProfile createEqualityProfile() {
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72 if (Profile.isProfilingEnabled()) {
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73 return Enabled.create();
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74 } else {
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75 return Disabled.INSTANCE;
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76 }
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77 }
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78
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79 /**
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80 * @deprecated going to get removed without replacement
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81 */
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82 @Deprecated
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83 public static boolean exactCompare(float a, float b) {
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84 /*
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85 * -0.0 == 0.0, but you can tell the difference through other means, so we need to
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86 * differentiate.
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87 */
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88 return Float.floatToRawIntBits(a) == Float.floatToRawIntBits(b);
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89 }
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90
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91 /**
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92 * @deprecated going to get removed without replacement
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93 */
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94 @Deprecated
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95 public static boolean exactCompare(double a, double b) {
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96 /*
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97 * -0.0 == 0.0, but you can tell the difference through other means, so we need to
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98 * differentiate.
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99 */
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100 return Double.doubleToRawLongBits(a) == Double.doubleToRawLongBits(b);
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101 }
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102
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103 static final class Enabled extends PrimitiveValueProfile {
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104
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105 private static final byte STATE_UNINITIALIZED = 0;
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106 private static final byte STATE_BYTE = 1;
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107 private static final byte STATE_SHORT = 2;
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108 private static final byte STATE_INTEGER = 3;
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109 private static final byte STATE_LONG = 4;
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110 private static final byte STATE_BOOLEAN = 5;
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111 private static final byte STATE_CHARACTER = 6;
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112 private static final byte STATE_FLOAT = 7;
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113 private static final byte STATE_DOUBLE = 8;
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114 private static final byte STATE_IDENTITY = 9;
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115 private static final byte STATE_GENERIC = 10;
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116
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117 @CompilationFinal private byte state = STATE_UNINITIALIZED;
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118 @CompilationFinal private Object cachedValue;
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119
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120 Enabled() {
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121 }
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122
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123 @SuppressWarnings("unchecked")
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124 @Override
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125 public <T> T profile(T value) {
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126 byte s = this.state;
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127 Object snapshot;
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128 switch (s) {
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129 case STATE_BYTE:
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130 case STATE_SHORT:
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131 case STATE_INTEGER:
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132 case STATE_LONG:
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133 case STATE_BOOLEAN:
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134 case STATE_CHARACTER:
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135 snapshot = this.cachedValue;
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136 if (snapshot.equals(value)) {
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137 return (T) snapshot;
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138 }
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139 break;
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140 case STATE_DOUBLE:
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141 snapshot = this.cachedValue;
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142 if (value instanceof Double && exactCompare((Double) snapshot, (Double) value)) {
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143 return (T) snapshot;
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144 }
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145 break;
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146 case STATE_FLOAT:
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147 snapshot = this.cachedValue;
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148 if (value instanceof Float && exactCompare((Float) snapshot, (Float) value)) {
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149 return (T) snapshot;
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150 }
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151 break;
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152 case STATE_IDENTITY:
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153 snapshot = this.cachedValue;
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154 if (snapshot == value) {
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155 return (T) snapshot;
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156 }
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157 break;
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158 case STATE_GENERIC:
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159 return value;
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160 }
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161 CompilerDirectives.transferToInterpreterAndInvalidate();
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162 slowpath(s, value);
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163 return value;
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164 }
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165
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166 @Override
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167 public byte profile(byte value) {
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168 byte s = this.state;
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diff changeset
169 if (s != STATE_GENERIC) {
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diff changeset
170 if (s == STATE_BYTE) {
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diff changeset
171 byte castCachedValue = (byte) this.cachedValue;
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172 if (castCachedValue == value) {
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173 return castCachedValue;
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174 }
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175 }
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diff changeset
176 CompilerDirectives.transferToInterpreterAndInvalidate();
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177 slowpath(s, value);
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178 }
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179 return value;
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180 }
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181
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182 @Override
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183 public short profile(short value) {
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184 byte s = this.state;
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185 if (s != STATE_GENERIC) {
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186 if (s == STATE_SHORT) {
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187 short castCachedValue = (short) this.cachedValue;
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188 if (castCachedValue == value) {
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189 return castCachedValue;
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190 }
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191 }
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192 CompilerDirectives.transferToInterpreterAndInvalidate();
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193 slowpath(s, value);
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194 }
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195 return value;
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196 }
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197
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198 @Override
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199 public int profile(int value) {
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200 byte s = this.state;
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201 if (s != STATE_GENERIC) {
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202 if (s == STATE_INTEGER) {
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203 int castCachedValue = (int) this.cachedValue;
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204 if (castCachedValue == value) {
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205 return castCachedValue;
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206 }
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207 }
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208 CompilerDirectives.transferToInterpreterAndInvalidate();
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209 slowpath(s, value);
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210 }
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211 return value;
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212 }
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213
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214 @Override
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215 public long profile(long value) {
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216 byte s = this.state;
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217 if (s != STATE_GENERIC) {
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218 if (s == STATE_LONG) {
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219 long castCachedValue = (long) this.cachedValue;
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220 if (castCachedValue == value) {
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221 return castCachedValue;
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222 }
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223 }
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224 CompilerDirectives.transferToInterpreterAndInvalidate();
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225 slowpath(s, value);
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226 }
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227 return value;
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228 }
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229
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230 @Override
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231 public float profile(float value) {
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232 byte s = this.state;
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233 if (s != STATE_GENERIC) {
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234 if (s == STATE_FLOAT) {
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235 float castCachedValue = (float) this.cachedValue;
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236 if (exactCompare(castCachedValue, value)) {
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237 return castCachedValue;
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238 }
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239 }
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240 CompilerDirectives.transferToInterpreterAndInvalidate();
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241 slowpath(s, value);
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242 }
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243 return value;
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244 }
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245
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246 @Override
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247 public double profile(double value) {
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248 byte s = this.state;
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249 if (s != STATE_GENERIC) {
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250 if (s == STATE_DOUBLE) {
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251 double castCachedValue = (double) this.cachedValue;
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252 if (exactCompare(castCachedValue, value)) {
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253 return castCachedValue;
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254 }
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255 }
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256 CompilerDirectives.transferToInterpreterAndInvalidate();
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257 slowpath(s, value);
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258 }
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259 return value;
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260
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261 }
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262
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263 @Override
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264 public boolean profile(boolean value) {
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265 byte s = this.state;
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266 if (s != STATE_GENERIC) {
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267 if (s == STATE_BOOLEAN) {
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268 boolean castCachedValue = (boolean) this.cachedValue;
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269 if (castCachedValue == value) {
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270 return castCachedValue;
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271 }
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272 }
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273 CompilerDirectives.transferToInterpreterAndInvalidate();
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274 slowpath(s, value);
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275 }
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276 return value;
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277 }
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278
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279 @Override
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280 public char profile(char value) {
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281 byte s = this.state;
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282 if (s != STATE_GENERIC) {
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283 if (s == STATE_CHARACTER) {
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284 char castCachedValue = (char) this.cachedValue;
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285 if (castCachedValue == value) {
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286 return castCachedValue;
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287 }
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288 }
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289 CompilerDirectives.transferToInterpreterAndInvalidate();
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290 slowpath(s, value);
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291 }
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292 return value;
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293 }
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294
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295 private void slowpath(byte s, Object value) {
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296 if (s == STATE_UNINITIALIZED) {
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297 cachedValue = value;
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298 state = specialize(value);
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299 } else {
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300 state = STATE_GENERIC;
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301 cachedValue = null;
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302 }
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303 }
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304
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305 private static byte specialize(Object value) {
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306 if (value instanceof Byte) {
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307 return STATE_BYTE;
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308 } else if (value instanceof Short) {
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309 return STATE_SHORT;
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310 } else if (value instanceof Integer) {
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311 return STATE_INTEGER;
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312 } else if (value instanceof Long) {
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313 return STATE_LONG;
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314 } else if (value instanceof Boolean) {
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315 return STATE_BOOLEAN;
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316 } else if (value instanceof Character) {
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317 return STATE_CHARACTER;
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318 } else if (value instanceof Double) {
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319 return STATE_DOUBLE;
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320 } else if (value instanceof Float) {
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321 return STATE_FLOAT;
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322 } else {
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323 return STATE_IDENTITY;
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324 }
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325 }
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326
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327 boolean isGeneric() {
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328 return state == STATE_GENERIC;
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329 }
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330
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331 boolean isUninitialized() {
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332 return state == STATE_UNINITIALIZED;
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333 }
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334
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335 Object getCachedValue() {
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336 return cachedValue;
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337 }
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338
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339 @Override
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340 public String toString() {
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341 return toString(PrimitiveValueProfile.class, state == STATE_UNINITIALIZED, state == STATE_GENERIC, formatSpecialization());
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342 }
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343
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344 private String formatSpecialization() {
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345 Object snapshot = this.cachedValue;
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346 if (state != STATE_UNINITIALIZED && state != STATE_GENERIC) {
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347 if (snapshot == null) {
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348 return String.format("value == null");
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349 } else {
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350 if (state == STATE_IDENTITY) {
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351 String simpleName = snapshot.getClass().getSimpleName();
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352 return String.format("value == %s@%x", simpleName, Objects.hash(snapshot));
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353 } else {
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354 return String.format("value == (%s)%s", snapshot.getClass().getSimpleName(), snapshot);
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355 }
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356 }
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357 }
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358 return null;
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359 }
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360
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361 /**
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362 * Returns a {@link PrimitiveValueProfile} that speculates on the primitive equality or
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363 * object identity of a value.
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364 */
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365 static PrimitiveValueProfile create() {
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366 return new Enabled();
18164
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367 }
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368 }
22501
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369
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370 static final class Disabled extends PrimitiveValueProfile {
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371
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372 static final PrimitiveValueProfile INSTANCE = new Disabled();
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373
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374 @Override
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375 public <T> T profile(T value) {
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376 return value;
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377 }
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378
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379 @Override
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380 public byte profile(byte value) {
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381 return value;
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382 }
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383
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384 @Override
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385 public short profile(short value) {
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386 return value;
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387 }
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388
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389 @Override
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390 public int profile(int value) {
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391 return value;
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392 }
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393
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394 @Override
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395 public long profile(long value) {
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396 return value;
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397 }
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398
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399 @Override
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400 public float profile(float value) {
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401 return value;
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402 }
a63bda98cfdb Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
Christian Humer <christian.humer@oracle.com>
parents: 22157
diff changeset
403
a63bda98cfdb Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
Christian Humer <christian.humer@oracle.com>
parents: 22157
diff changeset
404 @Override
a63bda98cfdb Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
Christian Humer <christian.humer@oracle.com>
parents: 22157
diff changeset
405 public double profile(double value) {
a63bda98cfdb Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
Christian Humer <christian.humer@oracle.com>
parents: 22157
diff changeset
406 return value;
a63bda98cfdb Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
Christian Humer <christian.humer@oracle.com>
parents: 22157
diff changeset
407 }
a63bda98cfdb Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
Christian Humer <christian.humer@oracle.com>
parents: 22157
diff changeset
408
a63bda98cfdb Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
Christian Humer <christian.humer@oracle.com>
parents: 22157
diff changeset
409 @Override
a63bda98cfdb Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
Christian Humer <christian.humer@oracle.com>
parents: 22157
diff changeset
410 public boolean profile(boolean value) {
a63bda98cfdb Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
Christian Humer <christian.humer@oracle.com>
parents: 22157
diff changeset
411 return value;
a63bda98cfdb Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
Christian Humer <christian.humer@oracle.com>
parents: 22157
diff changeset
412 }
a63bda98cfdb Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
Christian Humer <christian.humer@oracle.com>
parents: 22157
diff changeset
413
a63bda98cfdb Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
Christian Humer <christian.humer@oracle.com>
parents: 22157
diff changeset
414 @Override
a63bda98cfdb Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
Christian Humer <christian.humer@oracle.com>
parents: 22157
diff changeset
415 public char profile(char value) {
a63bda98cfdb Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
Christian Humer <christian.humer@oracle.com>
parents: 22157
diff changeset
416 return value;
a63bda98cfdb Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
Christian Humer <christian.humer@oracle.com>
parents: 22157
diff changeset
417 }
a63bda98cfdb Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
Christian Humer <christian.humer@oracle.com>
parents: 22157
diff changeset
418
a63bda98cfdb Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
Christian Humer <christian.humer@oracle.com>
parents: 22157
diff changeset
419 @Override
a63bda98cfdb Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
Christian Humer <christian.humer@oracle.com>
parents: 22157
diff changeset
420 public String toString() {
a63bda98cfdb Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
Christian Humer <christian.humer@oracle.com>
parents: 22157
diff changeset
421 return toStringDisabled(PrimitiveValueProfile.class);
a63bda98cfdb Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
Christian Humer <christian.humer@oracle.com>
parents: 22157
diff changeset
422 }
a63bda98cfdb Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
Christian Humer <christian.humer@oracle.com>
parents: 22157
diff changeset
423
a63bda98cfdb Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
Christian Humer <christian.humer@oracle.com>
parents: 22157
diff changeset
424 }
a63bda98cfdb Extract profiles into separate package. Add isProfilingEnabled in TruffleRuntime to disable profiling in the default runtime; Add low overhead profiles for primitives; Add LoopConditionProfile; Profile footprint/threadsafety improvements; Make toString implementations more consistent; Greatly enhanced javadoc documentation for profiles; Deprecate old profiles
Christian Humer <christian.humer@oracle.com>
parents: 22157
diff changeset
425
18164
53afdc71b311 Truffle: added PrimitiveValueProfile.
Chris Seaton <chris.seaton@oracle.com>
parents:
diff changeset
426 }