Mercurial > hg > truffle
annotate truffle/com.oracle.truffle.api.dsl/src/com/oracle/truffle/api/dsl/internal/DSLOptions.java @ 22548:6b76a24fffbd default tip
Use all variables: a, b, u,v and x, y
author | Jaroslav Tulach <jaroslav.tulach@oracle.com> |
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date | Thu, 14 Jan 2016 14:20:57 +0100 |
parents | 414e82b9fc35 |
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rev | line source |
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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 * Lazy class loading ensures that all generated specialization classes are loaded lazily. |
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41 * Disabling this feature will eagerly load all classes but will also reduce the generated code |
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42 * size. |
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43 */ |
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44 boolean useLazyClassLoading() default true; |
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45 |
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46 /** |
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47 * Sets the optimization strategy for implicit casts. |
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48 */ |
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49 ImplicitCastOptimization implicitCastOptimization() default ImplicitCastOptimization.DUPLICATE_TAIL; |
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50 |
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51 /** Not yet implemented. */ |
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52 boolean useDisjunctiveMethodGuardOptimization() default true; |
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53 |
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54 public enum ImplicitCastOptimization { |
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55 |
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56 /** Perform no informed optimization for implicit casts. */ |
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57 NONE, |
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58 |
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59 /** Duplicate specializations for each used implicit cast combination. */ |
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60 DUPLICATE_TAIL, |
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61 |
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62 /** |
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63 * Use the same specialization for multiple combinations of implicit casts and specialize |
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64 * them independently. Not yet fully implemented. |
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65 */ |
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66 MERGE_CASTS; |
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67 |
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68 public boolean isNone() { |
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69 return this == NONE; |
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70 } |
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71 |
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72 public boolean isDuplicateTail() { |
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73 return this == DUPLICATE_TAIL; |
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74 } |
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75 |
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76 public boolean isMergeCasts() { |
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77 return this == MERGE_CASTS; |
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78 } |
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79 } |
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80 |
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81 public enum TypeBoxingOptimization { |
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82 /** Perform the optimization for all types. */ |
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83 ALWAYS, |
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84 /** Perform the optimization just for primitive types. */ |
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85 PRIMITIVE, |
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86 /** Perform the optimization for no types. */ |
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87 NONE; |
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88 } |
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89 |
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90 /** |
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91 * Defines the range of the generation of type specialized execute methods for return types and |
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92 * for specialized parameter types. A type specialized execute method is generated as soon as |
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93 * one declared type is either returned or used a specialized parameter. |
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94 */ |
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95 TypeBoxingOptimization monomorphicTypeBoxingOptimization() default TypeBoxingOptimization.PRIMITIVE; |
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96 |
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97 /** |
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98 * Defines the range of types for which type specialized execute methods should be used for |
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99 * polymorphic operations. |
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100 */ |
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101 TypeBoxingOptimization polymorphicTypeBoxingElimination() default TypeBoxingOptimization.PRIMITIVE; |
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102 |
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103 /** |
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104 * Defines the range of types for which type specialized execute methods for implicit cast |
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105 * optimizations are used. This option only has an effect if |
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106 * {@link ImplicitCastOptimization#DUPLICATE_TAIL} or |
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107 * {@link ImplicitCastOptimization#MERGE_CASTS} is set in {@link #implicitCastOptimization()}. |
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108 */ |
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109 TypeBoxingOptimization implicitTypeBoxingOptimization() default TypeBoxingOptimization.PRIMITIVE; |
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110 |
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111 /** |
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112 * Defines range of specialization return types in which the void boxing optimization is used. |
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113 * Void boxing generates an extra execute method with {@link Void} return type in order to avoid |
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114 * boxing and type checking of the return type in case the return type is not needed. For this |
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115 * to work the operation class needs to provide an overridable execute method returning |
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116 * {@link Void}. |
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117 */ |
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118 TypeBoxingOptimization voidBoxingOptimization() default TypeBoxingOptimization.PRIMITIVE; |
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119 |
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120 public enum FallbackOptimization { |
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121 /** Always generate an optimized fallback specialization. */ |
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122 ALWAYS, |
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123 |
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124 /** |
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125 * Only generate an optimized fallback specialization if a method annotated with @Fallback |
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126 * is used in the operation. |
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127 */ |
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128 DECLARED, |
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129 |
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130 /** |
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131 * Never generate an optimized fallback specialization. Please be aware that triggering a @Fallback |
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132 * case without optimization will also invalidate your compiled code. |
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133 */ |
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134 NEVER; |
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135 } |
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136 |
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137 /** Defines the optimization strategy that is used to optimize @Fallback annotated methods. */ |
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138 FallbackOptimization optimizeFallback() default FallbackOptimization.DECLARED; |
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139 |
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140 } |