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annotate graal/com.oracle.max.cri/src/com/oracle/max/cri/xir/XirSite.java @ 4199:aaac4894175c

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Renamed cri packages from sun to oracle.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Tue, 03 Jan 2012 16:29:28 +0100
parents graal/com.oracle.max.cri/src/com/sun/cri/xir/XirSite.java@e233f5660da4
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 }