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annotate graal/com.oracle.max.criutils/src/com/oracle/max/criutils/BaseProfilingInfo.java @ 5105:95b8a32a7cc3

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preparations to avoid endless recompilations because of not updated profiling information
author Christian Haeubl <christian.haeubl@oracle.com>
date Mon, 12 Mar 2012 18:40:05 -0700
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children dad1ac9dba7d
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5105
95b8a32a7cc3 preparations to avoid endless recompilations because of not updated profiling information
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1 /*
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2 * Copyright (c) 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.max.criutils;
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24
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25 import com.oracle.max.cri.ri.*;
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26
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27
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28 /**
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29 * Dummy profiling information in case that a method was not executed frequently enough so that
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30 * no profiling information does exist yet, or in case that the profiling information should not be used.
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31 */
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32 public final class BaseProfilingInfo implements RiProfilingInfo {
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33 private static final RiProfilingInfo[] NO_PROFILING_INFO = new RiProfilingInfo[] {
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34 new BaseProfilingInfo(RiExceptionSeen.TRUE),
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35 new BaseProfilingInfo(RiExceptionSeen.FALSE),
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36 new BaseProfilingInfo(RiExceptionSeen.NOT_SUPPORTED)
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37 };
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38
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39 private final RiExceptionSeen exceptionSeen;
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40
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41 BaseProfilingInfo(RiExceptionSeen exceptionSeen) {
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42 this.exceptionSeen = exceptionSeen;
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43 }
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44
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45 @Override
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46 public RiTypeProfile getTypeProfile(int bci) {
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47 return null;
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48 }
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49
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50 @Override
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51 public double getBranchTakenProbability(int bci) {
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52 return -1;
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53 }
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54
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55 @Override
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56 public double[] getSwitchProbabilities(int bci) {
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57 return null;
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58 }
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59
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60 @Override
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61 public RiExceptionSeen getExceptionSeen(int bci) {
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62 return exceptionSeen;
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63 }
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64
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65 @Override
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66 public int getExecutionCount(int bci) {
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67 return -1;
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68 }
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69
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70 public static RiProfilingInfo get(RiExceptionSeen exceptionSeen) {
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71 return NO_PROFILING_INFO[exceptionSeen.ordinal()];
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72 }
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73 }