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annotate truffle/com.oracle.truffle.api.dsl/src/com/oracle/truffle/api/dsl/internal/DSLOptions.java @ 22157:dc83cc1f94f2

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Using fully qualified imports
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Wed, 16 Sep 2015 11:33:22 +0200
parents 9c8c0937da41
children 414e82b9fc35
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1 /*
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2 * Copyright (c) 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. 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.dsl.internal;
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26
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27 import java.lang.annotation.ElementType;
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28 import java.lang.annotation.Retention;
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29 import java.lang.annotation.RetentionPolicy;
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30 import java.lang.annotation.Target;
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31
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32 /**
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33 * Internal DSL options to tune the generated code. These are expert options and not intended to be
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34 * changed used for guest language implementations.
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35 */
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36 @Retention(RetentionPolicy.RUNTIME)
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37 @Target({ElementType.TYPE})
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38 public @interface DSLOptions {
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39
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40 /** Flag has no effect anymore. Is going to be removed soon. */
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41 @Deprecated
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42 boolean useNewLayout() default true;
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43
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44 /**
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45 * Lazy class loading ensures that all generated specialization classes are loaded lazily.
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46 * Disabling this feature will eagerly load all classes but will also reduce the generated code
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47 * size.
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48 */
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49 boolean useLazyClassLoading() default true;
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50
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51 /**
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52 * Sets the optimization strategy for implicit casts.
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53 */
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54 ImplicitCastOptimization implicitCastOptimization() default ImplicitCastOptimization.DUPLICATE_TAIL;
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55
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56 /** Not yet implemented. */
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57 boolean useDisjunctiveMethodGuardOptimization() default true;
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58
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59 public enum ImplicitCastOptimization {
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60
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61 /** Perform no informed optimization for implicit casts. */
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62 NONE,
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63
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64 /** Duplicate specializations for each used implicit cast combination. */
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65 DUPLICATE_TAIL,
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66
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67 /**
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68 * Use the same specialization for multiple combinations of implicit casts and specialize
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69 * them independently. Not yet fully implemented.
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70 */
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71 MERGE_CASTS;
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72
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73 public boolean isNone() {
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74 return this == NONE;
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75 }
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76
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77 public boolean isDuplicateTail() {
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78 return this == DUPLICATE_TAIL;
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79 }
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80
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81 public boolean isMergeCasts() {
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82 return this == MERGE_CASTS;
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83 }
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84 }
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85
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86 public enum TypeBoxingOptimization {
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87 /** Perform the optimization for all types. */
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88 ALWAYS,
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89 /** Perform the optimization just for primitive types. */
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90 PRIMITIVE,
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91 /** Perform the optimization for no types. */
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92 NONE;
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93 }
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94
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95 /**
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96 * Defines the range of the generation of type specialized execute methods for return types and
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97 * for specialized parameter types. A type specialized execute method is generated as soon as
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98 * one declared type is either returned or used a specialized parameter.
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99 */
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100 TypeBoxingOptimization monomorphicTypeBoxingOptimization() default TypeBoxingOptimization.PRIMITIVE;
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101
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102 /**
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103 * Defines the range of types for which type specialized execute methods should be used for
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104 * polymorphic operations.
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105 */
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106 TypeBoxingOptimization polymorphicTypeBoxingElimination() default TypeBoxingOptimization.PRIMITIVE;
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107
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108 /**
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109 * Defines the range of types for which type specialized execute methods for implicit cast
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110 * optimizations are used. This option only has an effect if
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111 * {@link ImplicitCastOptimization#DUPLICATE_TAIL} or
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112 * {@link ImplicitCastOptimization#MERGE_CASTS} is set in {@link #implicitCastOptimization()}.
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113 */
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114 TypeBoxingOptimization implicitTypeBoxingOptimization() default TypeBoxingOptimization.PRIMITIVE;
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115
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116 /**
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117 * Defines range of specialization return types in which the void boxing optimization is used.
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118 * Void boxing generates an extra execute method with {@link Void} return type in order to avoid
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119 * boxing and type checking of the return type in case the return type is not needed. For this
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120 * to work the operation class needs to provide an overridable execute method returning
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121 * {@link Void}.
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122 */
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123 TypeBoxingOptimization voidBoxingOptimization() default TypeBoxingOptimization.PRIMITIVE;
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124
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125 public enum FallbackOptimization {
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126 /** Always generate an optimized fallback specialization. */
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127 ALWAYS,
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128
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129 /**
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130 * Only generate an optimized fallback specialization if a method annotated with @Fallback
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131 * is used in the operation.
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132 */
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133 DECLARED,
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134
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135 /**
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136 * Never generate an optimized fallback specialization. Please be aware that triggering a @Fallback
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137 * case without optimization will also invalidate your compiled code.
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138 */
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139 NEVER;
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140 }
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141
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142 /** Defines the optimization strategy that is used to optimize @Fallback annotated methods. */
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diff changeset
143 FallbackOptimization optimizeFallback() default FallbackOptimization.DECLARED;
a665483c3881 Truffle-DSL: new node layout implementation.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
144
a665483c3881 Truffle-DSL: new node layout implementation.
Christian Humer <christian.humer@gmail.com>
parents:
diff changeset
145 }