1783
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1 /*
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2 * Copyright (c) 2001, 2010, 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 */
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24
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1972
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25 #ifndef SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_INLINE_HPP
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26 #define SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_INLINE_HPP
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1783
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27
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28 template<CompLevel level>
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29 bool SimpleThresholdPolicy::call_predicate_helper(int i, int b, double scale) {
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30 switch(level) {
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31 case CompLevel_none:
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32 case CompLevel_limited_profile:
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33 return (i > Tier3InvocationThreshold * scale) ||
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34 (i > Tier3MinInvocationThreshold * scale && i + b > Tier3CompileThreshold * scale);
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35 case CompLevel_full_profile:
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36 return (i > Tier4InvocationThreshold * scale) ||
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37 (i > Tier4MinInvocationThreshold * scale && i + b > Tier4CompileThreshold * scale);
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38 }
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39 return true;
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40 }
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41
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42 template<CompLevel level>
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43 bool SimpleThresholdPolicy::loop_predicate_helper(int i, int b, double scale) {
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44 switch(level) {
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45 case CompLevel_none:
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46 case CompLevel_limited_profile:
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47 return b > Tier3BackEdgeThreshold * scale;
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48 case CompLevel_full_profile:
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49 return b > Tier4BackEdgeThreshold * scale;
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50 }
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51 return true;
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52 }
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53
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54 // Simple methods are as good being compiled with C1 as C2.
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55 // Determine if a given method is such a case.
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56 bool SimpleThresholdPolicy::is_trivial(methodOop method) {
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57 if (method->is_accessor()) return true;
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58 if (method->code() != NULL) {
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59 methodDataOop mdo = method->method_data();
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60 if (mdo != NULL && mdo->num_loops() == 0 &&
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61 (method->code_size() < 5 || (mdo->num_blocks() < 4) && (method->code_size() < 15))) {
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62 return !mdo->would_profile();
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63 }
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64 }
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65 return false;
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66 }
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1972
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67
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68 #endif // SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_INLINE_HPP
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