Mercurial > hg > truffle
annotate graal/com.oracle.max.cri/src/com/oracle/max/cri/xir/XirSite.java @ 4249:1aaf3592e516
Fix some warnings from findbugs
author | Gilles Duboscq <gilles.m.duboscq@gmail.com> |
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date | Mon, 09 Jan 2012 14:05:12 +0100 |
parents | aaac4894175c |
children | 985fbd8adf65 |
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1 /* |
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2 * Copyright (c) 2009, 2011, 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.max.cri.xir; |
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24 |
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25 import com.oracle.max.cri.ci.*; |
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26 import com.oracle.max.cri.ri.*; |
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27 |
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28 /** |
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29 * Encapsulates the notion of a site where XIR can be supplied. It is supplied to the {@link RiXirGenerator} by the |
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30 * compiler for each place where XIR can be generated. This interface allows a number of queries, including the |
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31 * bytecode-level location and optimization hints computed by the compiler. |
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32 */ |
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33 public interface XirSite { |
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34 |
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35 /** |
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36 * Gets the {@link CiCodePos code position} associated with this site. This is useful for inserting |
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37 * instrumentation at the XIR level. |
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38 * @return the code position if it is available; {@code null} otherwise |
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39 */ |
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40 CiCodePos getCodePos(); |
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41 |
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42 /** |
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43 * Checks whether the specified argument is guaranteed to be non-null at this site. |
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44 * @param argument the argument |
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45 * @return {@code true} if the argument is non null at this site |
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46 */ |
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47 boolean isNonNull(XirArgument argument); |
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48 |
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49 /** |
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50 * Checks whether this site requires a null check. |
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51 * @return {@code true} if a null check is required |
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52 */ |
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53 boolean requiresNullCheck(); |
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54 |
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55 /** |
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56 * Checks whether this site requires a range check. |
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57 * @return {@code true} if a range check is required |
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58 */ |
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59 boolean requiresBoundsCheck(); |
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60 |
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61 /** |
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62 * Checks whether this site requires a read barrier. |
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63 * @return {@code true} if a read barrier is required |
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64 */ |
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65 boolean requiresReadBarrier(); |
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66 |
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67 /** |
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68 * Checks whether this site requires a write barrier. |
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69 * @return {@code true} if a write barrier is required |
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70 */ |
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71 boolean requiresWriteBarrier(); |
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72 |
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73 /** |
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74 * Checks whether this site requires an array store check. |
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75 * @return {@code true} if an array store check is required |
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76 */ |
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77 boolean requiresArrayStoreCheck(); |
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78 |
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79 /** |
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80 * Checks whether an approximation of the type for the specified argument is available. |
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81 * @param argument the argument |
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82 * @return an {@link RiType} indicating the most specific type known for the argument, if any; |
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83 * {@code null} if no particular type is known |
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84 */ |
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85 RiType getApproximateType(XirArgument argument); |
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86 |
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87 /** |
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88 * Checks whether an exact type is known for the specified argument. |
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89 * @param argument the argument |
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90 * @return an {@link RiType} indicating the exact type known for the argument, if any; |
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91 * {@code null} if no particular type is known |
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92 */ |
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93 RiType getExactType(XirArgument argument); |
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94 } |