Mercurial > hg > truffle
annotate graal/com.oracle.max.cri/src/com/oracle/max/cri/ri/RiTypeProfile.java @ 5486:85986efe747e
Check edge types for replacements in addDuplicate
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Mon, 04 Jun 2012 16:15:56 +0200 |
parents | 2e9a5365dfb0 |
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1 /* |
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2 * Copyright (c) 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.ri; |
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24 |
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25 import java.io.*; |
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26 |
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27 /** |
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28 * This profile object represents the type profile at a specific BCI. The precision of the supplied values may vary, |
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29 * but a runtime that provides this information should be aware that it will be used to guide performance-critical |
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30 * decisions like speculative inlining, etc. |
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31 */ |
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32 public final class RiTypeProfile implements Serializable { |
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33 |
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34 private static final long serialVersionUID = -6877016333706838441L; |
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35 |
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36 /** |
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37 * A profiled type that has a probability. Profiled types are naturally sorted in |
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38 * descending order of their probabilities. |
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39 */ |
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40 public static class ProfiledType implements Comparable<ProfiledType>, Serializable { |
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41 private static final long serialVersionUID = 7838575753661305744L; |
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42 public final RiResolvedType type; |
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43 public final double probability; |
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44 |
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45 public ProfiledType(RiResolvedType type, double probability) { |
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46 assert type != null; |
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47 assert probability >= 0.0D && probability <= 1.0D; |
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48 this.type = type; |
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49 this.probability = probability; |
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50 } |
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51 |
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52 @Override |
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53 public int compareTo(ProfiledType o) { |
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54 if (probability > o.probability) { |
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55 return -1; |
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56 } else if (probability < o.probability) { |
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57 return 1; |
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58 } |
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59 return 0; |
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60 } |
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61 } |
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62 |
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63 private final double notRecordedProbability; |
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64 private final ProfiledType[] ptypes; |
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65 |
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66 /** |
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67 * Determines if an array of profiled types are sorted in descending order of their probabilities. |
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68 */ |
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69 public static boolean isSorted(ProfiledType[] ptypes) { |
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70 for (int i = 1; i < ptypes.length; i++) { |
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71 if (ptypes[i - 1].probability < ptypes[i].probability) { |
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72 return false; |
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73 } |
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74 } |
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75 return true; |
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76 } |
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77 |
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78 public RiTypeProfile(double notRecordedProbability, ProfiledType... ptypes) { |
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79 this.ptypes = ptypes; |
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80 this.notRecordedProbability = notRecordedProbability; |
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81 assert isSorted(ptypes); |
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82 } |
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83 |
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84 /** |
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85 * Returns the estimated probability of all types that could not be recorded due to profiling limitations. |
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86 * @return double value >= 0.0 and <= 1.0 |
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87 */ |
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88 public double getNotRecordedProbability() { |
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89 return notRecordedProbability; |
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90 } |
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91 |
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92 /** |
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93 * A list of types for which the runtime has recorded probability information. |
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94 */ |
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95 public ProfiledType[] getTypes() { |
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96 return ptypes; |
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97 } |
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98 } |