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annotate truffle/com.oracle.truffle.api/src/com/oracle/truffle/api/profiles/PrimitiveValueProfile.java @ 22501:a63bda98cfdb

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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
author Christian Humer <christian.humer@oracle.com>
date Wed, 16 Dec 2015 16:38:13 +0100
parents truffle/com.oracle.truffle.api/src/com/oracle/truffle/api/utilities/PrimitiveValueProfile.java@dc83cc1f94f2
children
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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 import com.oracle.truffle.api.Truffle;
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32
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33 /**
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34 * <p>
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35 * Represents a {@link ValueProfile} that speculates on the primitive equality or object identity of
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36 * values. Note that for {@code float} and {@code double} values we compare primitive equality via
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37 * {@link Float#floatToRawIntBits} and {@link Double#doubleToRawLongBits}, so that for example
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38 * {@code -0.0} is not considered the same as {@code 0.0}, even though primitive equality would
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39 * normally say that it was.
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40 * </p>
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41 *
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42 * {@inheritDoc}
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43 */
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44 public abstract class PrimitiveValueProfile extends ValueProfile {
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45
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46 PrimitiveValueProfile() {
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47 }
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48
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49 @Override
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50 public abstract <T> T profile(T value);
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52 public abstract byte profile(byte value);
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54 public abstract short profile(short value);
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55
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56 public abstract int profile(int value);
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58 public abstract long profile(long value);
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60 public abstract float profile(float value);
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61
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62 public abstract double profile(double value);
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64 public abstract boolean profile(boolean value);
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65
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66 public abstract char profile(char value);
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67
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68 /**
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69 * Returns a {@link PrimitiveValueProfile} that speculates on the primitive equality or object
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70 * identity of a value.
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71 */
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72 public static PrimitiveValueProfile createEqualityProfile() {
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73 if (Truffle.getRuntime().isProfilingEnabled()) {
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74 return Enabled.create();
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75 } else {
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76 return Disabled.INSTANCE;
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77 }
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78 }
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79
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80 /**
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81 * @deprecated going to get removed without replacement
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82 */
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83 @Deprecated
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84 public static boolean exactCompare(float a, float b) {
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85 /*
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86 * -0.0 == 0.0, but you can tell the difference through other means, so we need to
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87 * differentiate.
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88 */
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89 return Float.floatToRawIntBits(a) == Float.floatToRawIntBits(b);
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90 }
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91
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92 /**
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93 * @deprecated going to get removed without replacement
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94 */
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95 @Deprecated
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96 public static boolean exactCompare(double a, double b) {
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97 /*
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98 * -0.0 == 0.0, but you can tell the difference through other means, so we need to
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99 * differentiate.
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100 */
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101 return Double.doubleToRawLongBits(a) == Double.doubleToRawLongBits(b);
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102 }
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103
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104 static final class Enabled extends PrimitiveValueProfile {
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105
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106 private static final byte STATE_UNINITIALIZED = 0;
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107 private static final byte STATE_BYTE = 1;
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108 private static final byte STATE_SHORT = 2;
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109 private static final byte STATE_INTEGER = 3;
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110 private static final byte STATE_LONG = 4;
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111 private static final byte STATE_BOOLEAN = 5;
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112 private static final byte STATE_CHARACTER = 6;
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113 private static final byte STATE_FLOAT = 7;
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114 private static final byte STATE_DOUBLE = 8;
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115 private static final byte STATE_IDENTITY = 9;
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116 private static final byte STATE_GENERIC = 10;
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117
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118 @CompilationFinal private byte state = STATE_UNINITIALIZED;
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119 @CompilationFinal private Object cachedValue;
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120
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121 Enabled() {
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122 }
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123
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124 @SuppressWarnings("unchecked")
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125 @Override
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126 public <T> T profile(T value) {
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127 byte s = this.state;
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128 Object snapshot;
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129 switch (s) {
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130 case STATE_BYTE:
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131 case STATE_SHORT:
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132 case STATE_INTEGER:
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133 case STATE_LONG:
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134 case STATE_BOOLEAN:
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135 case STATE_CHARACTER:
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136 snapshot = this.cachedValue;
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137 if (snapshot.equals(value)) {
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138 return (T) snapshot;
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139 }
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140 break;
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141 case STATE_DOUBLE:
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142 snapshot = this.cachedValue;
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143 if (value instanceof Double && exactCompare((Double) snapshot, (Double) value)) {
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144 return (T) snapshot;
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145 }
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146 break;
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147 case STATE_FLOAT:
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148 snapshot = this.cachedValue;
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149 if (value instanceof Float && exactCompare((Float) snapshot, (Float) value)) {
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150 return (T) snapshot;
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151 }
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152 break;
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153 case STATE_IDENTITY:
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154 snapshot = this.cachedValue;
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155 if (snapshot == value) {
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156 return (T) snapshot;
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157 }
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158 break;
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159 case STATE_GENERIC:
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160 return value;
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161 }
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162 CompilerDirectives.transferToInterpreterAndInvalidate();
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163 slowpath(s, value);
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164 return value;
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165 }
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166
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167 @Override
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168 public byte profile(byte value) {
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169 byte s = this.state;
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170 if (s != STATE_GENERIC) {
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171 if (s == STATE_BYTE) {
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172 byte castCachedValue = (byte) this.cachedValue;
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173 if (castCachedValue == value) {
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174 return castCachedValue;
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175 }
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176 }
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177 CompilerDirectives.transferToInterpreterAndInvalidate();
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178 slowpath(s, value);
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179 }
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180 return value;
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181 }
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182
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183 @Override
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184 public short profile(short value) {
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185 byte s = this.state;
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186 if (s != STATE_GENERIC) {
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187 if (s == STATE_SHORT) {
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188 short castCachedValue = (short) this.cachedValue;
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189 if (castCachedValue == value) {
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190 return castCachedValue;
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191 }
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192 }
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193 CompilerDirectives.transferToInterpreterAndInvalidate();
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194 slowpath(s, value);
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195 }
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196 return value;
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197 }
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198
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199 @Override
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200 public int profile(int value) {
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201 byte s = this.state;
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202 if (s != STATE_GENERIC) {
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203 if (s == STATE_INTEGER) {
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204 int castCachedValue = (int) this.cachedValue;
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205 if (castCachedValue == value) {
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206 return castCachedValue;
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207 }
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208 }
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209 CompilerDirectives.transferToInterpreterAndInvalidate();
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210 slowpath(s, value);
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211 }
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212 return value;
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213 }
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214
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215 @Override
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216 public long profile(long value) {
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217 byte s = this.state;
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218 if (s != STATE_GENERIC) {
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219 if (s == STATE_LONG) {
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220 long castCachedValue = (long) this.cachedValue;
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221 if (castCachedValue == value) {
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222 return castCachedValue;
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223 }
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224 }
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225 CompilerDirectives.transferToInterpreterAndInvalidate();
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226 slowpath(s, value);
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227 }
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228 return value;
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229 }
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230
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231 @Override
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232 public float profile(float value) {
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233 byte s = this.state;
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234 if (s != STATE_GENERIC) {
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235 if (s == STATE_FLOAT) {
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236 float castCachedValue = (float) this.cachedValue;
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237 if (exactCompare(castCachedValue, value)) {
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238 return castCachedValue;
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239 }
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240 }
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241 CompilerDirectives.transferToInterpreterAndInvalidate();
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242 slowpath(s, value);
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243 }
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244 return value;
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245 }
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246
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247 @Override
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248 public double profile(double value) {
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249 byte s = this.state;
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250 if (s != STATE_GENERIC) {
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251 if (s == STATE_DOUBLE) {
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252 double castCachedValue = (double) this.cachedValue;
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253 if (exactCompare(castCachedValue, value)) {
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254 return castCachedValue;
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255 }
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256 }
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257 CompilerDirectives.transferToInterpreterAndInvalidate();
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258 slowpath(s, value);
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259 }
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260 return value;
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261
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262 }
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263
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264 @Override
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265 public boolean profile(boolean value) {
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266 byte s = this.state;
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267 if (s != STATE_GENERIC) {
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268 if (s == STATE_BOOLEAN) {
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269 boolean castCachedValue = (boolean) this.cachedValue;
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270 if (castCachedValue == value) {
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271 return castCachedValue;
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272 }
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273 }
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274 CompilerDirectives.transferToInterpreterAndInvalidate();
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275 slowpath(s, value);
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276 }
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277 return value;
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278 }
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279
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280 @Override
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281 public char profile(char value) {
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282 byte s = this.state;
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283 if (s != STATE_GENERIC) {
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284 if (s == STATE_CHARACTER) {
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285 char castCachedValue = (char) this.cachedValue;
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286 if (castCachedValue == value) {
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287 return castCachedValue;
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288 }
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289 }
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290 CompilerDirectives.transferToInterpreterAndInvalidate();
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291 slowpath(s, value);
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292 }
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293 return value;
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294 }
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295
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296 private void slowpath(byte s, Object value) {
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297 if (s == STATE_UNINITIALIZED) {
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298 cachedValue = value;
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299 state = specialize(value);
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300 } else {
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301 state = STATE_GENERIC;
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302 cachedValue = null;
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303 }
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304 }
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305
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306 private static byte specialize(Object value) {
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307 if (value instanceof Byte) {
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308 return STATE_BYTE;
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309 } else if (value instanceof Short) {
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310 return STATE_SHORT;
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311 } else if (value instanceof Integer) {
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312 return STATE_INTEGER;
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313 } else if (value instanceof Long) {
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314 return STATE_LONG;
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315 } else if (value instanceof Boolean) {
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316 return STATE_BOOLEAN;
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317 } else if (value instanceof Character) {
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318 return STATE_CHARACTER;
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319 } else if (value instanceof Double) {
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320 return STATE_DOUBLE;
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321 } else if (value instanceof Float) {
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322 return STATE_FLOAT;
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323 } else {
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324 return STATE_IDENTITY;
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325 }
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326 }
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327
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328 boolean isGeneric() {
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329 return state == STATE_GENERIC;
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330 }
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331
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332 boolean isUninitialized() {
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333 return state == STATE_UNINITIALIZED;
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334 }
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335
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336 Object getCachedValue() {
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337 return cachedValue;
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338 }
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339
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340 @Override
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341 public String toString() {
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342 return toString(PrimitiveValueProfile.class, state == STATE_UNINITIALIZED, state == STATE_GENERIC, formatSpecialization());
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343 }
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344
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345 private String formatSpecialization() {
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346 Object snapshot = this.cachedValue;
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347 if (state != STATE_UNINITIALIZED && state != STATE_GENERIC) {
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348 if (snapshot == null) {
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349 return String.format("value == null");
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350 } else {
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351 if (state == STATE_IDENTITY) {
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352 String simpleName = snapshot.getClass().getSimpleName();
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353 return String.format("value == %s@%x", simpleName, Objects.hash(snapshot));
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354 } else {
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355 return String.format("value == (%s)%s", snapshot.getClass().getSimpleName(), snapshot);
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356 }
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357 }
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358 }
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359 return null;
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360 }
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361
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362 /**
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363 * Returns a {@link PrimitiveValueProfile} that speculates on the primitive equality or
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364 * object identity of a value.
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365 */
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366 static PrimitiveValueProfile create() {
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367 return new Enabled();
18164
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368 }
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369 }
22501
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370
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371 static final class Disabled extends PrimitiveValueProfile {
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372
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373 static final PrimitiveValueProfile INSTANCE = new Disabled();
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374
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375 @Override
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376 public <T> T profile(T value) {
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377 return value;
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378 }
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379
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380 @Override
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381 public byte profile(byte value) {
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382 return value;
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383 }
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384
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385 @Override
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386 public short profile(short value) {
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387 return value;
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388 }
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389
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390 @Override
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391 public int profile(int value) {
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392 return value;
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393 }
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394
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395 @Override
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396 public long profile(long value) {
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397 return value;
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398 }
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399
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400 @Override
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diff changeset
401 public float profile(float 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
402 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
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
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 @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
406 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
407 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
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
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 @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
411 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
412 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
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
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 @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
416 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
417 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
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
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 @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
421 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
422 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
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 }
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
426
18164
53afdc71b311 Truffle: added PrimitiveValueProfile.
Chris Seaton <chris.seaton@oracle.com>
parents:
diff changeset
427 }