Mercurial > hg > graal-compiler
annotate graal/com.oracle.truffle.api.codegen/src/com/oracle/truffle/api/codegen/TypeSystem.java @ 7296:8d9c7a109967
Fix elimination of unnecessary UnsafeCastNode
author | Christian Wimmer <christian.wimmer@oracle.com> |
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date | Wed, 26 Dec 2012 13:36:41 -0800 |
parents | a748e4d44694 |
children | 6343a09b2ec1 |
rev | line source |
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Truffle API to specify type-specalized Node classes; annotation processor for automatic code generation of the type-specialized Node classes during the build process
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1 /* |
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2 * Copyright (c) 2012, 2012, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 package com.oracle.truffle.api.codegen; |
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24 |
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25 import java.lang.annotation.*; |
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26 |
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27 import com.oracle.truffle.api.nodes.*; |
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28 |
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29 /** |
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30 * <p> |
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31 * Annotates a type system class that represents type information for a node. Generates code for converting and managing |
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32 * types. Methods contained in the type system may be annotated with {@link TypeCast}, {@link TypeCheck} or |
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33 * {@link GuardCheck}. These methods alter the default behavior of the type system. |
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34 * </p> |
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35 * |
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36 * |
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37 * <b>Example:</b> |
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38 * <p> |
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39 * Shows a <code>@TypeSystem</code> definition with three types. In this example BigIntegers can be also treated as |
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40 * integers if their bit width is less than 32. |
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41 * </p> |
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42 * |
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43 * <pre> |
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44 * |
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45 * @TypeSystem(types = {int.class, BigInteger.class, String.class}, nodeBaseClass = TypedNode.class) |
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46 * public abstract class Types { |
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47 * |
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48 * @TypeCheck |
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49 * public boolean isInteger(Object value) { |
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50 * return value instanceof Integer || (value instanceof BigInteger && ((BigInteger) value).bitLength() < Integer.SIZE); |
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51 * } |
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52 * |
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53 * @TypeCast |
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54 * public int asInteger(Object value) { |
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55 * if (value instanceof Integer) { |
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56 * return (int) value; |
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57 * } else { |
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58 * return ((BigInteger) value).intValue(); |
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59 * } |
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60 * } |
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61 * } |
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62 * </pre> |
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63 * |
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64 * @see TypeCast |
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65 * @see TypeCheck |
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66 * @see GuardCheck |
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67 */ |
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68 @Retention(RetentionPolicy.CLASS) |
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69 @Target({ElementType.TYPE}) |
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70 public @interface TypeSystem { |
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71 |
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72 /** |
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73 * Sets the types contained by this type system. The order of types also determines the order of specialization. |
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74 */ |
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75 Class[] types(); |
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76 |
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77 /** |
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78 * Specifies whether the node base class has an executeVoid method or not. Operations derived from this type system |
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79 * will automatically implement executeVoid for all generated nodes. Defaults to false. |
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80 */ |
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81 boolean hasVoid() default false; |
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82 |
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83 /** |
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84 * Specifies the node base class used for generated code that uses this type system. The node base class must extend |
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85 * {@link Node} and provide a public non-final method <code>${type} execute${typeName}(VirtualFrame)</code> for all |
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86 * types specified in the types attribute. |
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87 */ |
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88 Class< ? extends Node> nodeBaseClass(); |
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89 |
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90 } |