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comparison: src/share/vm/runtime/simpleThresholdPolicy.inline.hpp
src/share/vm/runtime/simpleThresholdPolicy.inline.hpp
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| 1 /* | |
| 2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #ifndef SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_INLINE_HPP | |
| 26 #define SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_INLINE_HPP | |
| 27 | |
| 28 template<CompLevel level> | |
| 29 bool SimpleThresholdPolicy::call_predicate_helper(int i, int b, double scale) { | |
| 30 switch(level) { | |
| 31 case CompLevel_none: | |
| 32 case CompLevel_limited_profile: | |
| 33 return (i > Tier3InvocationThreshold * scale) || | |
| 34 (i > Tier3MinInvocationThreshold * scale && i + b > Tier3CompileThreshold * scale); | |
| 35 case CompLevel_full_profile: | |
| 36 return (i > Tier4InvocationThreshold * scale) || | |
| 37 (i > Tier4MinInvocationThreshold * scale && i + b > Tier4CompileThreshold * scale); | |
| 38 } | |
| 39 return true; | |
| 40 } | |
| 41 | |
| 42 template<CompLevel level> | |
| 43 bool SimpleThresholdPolicy::loop_predicate_helper(int i, int b, double scale) { | |
| 44 switch(level) { | |
| 45 case CompLevel_none: | |
| 46 case CompLevel_limited_profile: | |
| 47 return b > Tier3BackEdgeThreshold * scale; | |
| 48 case CompLevel_full_profile: | |
| 49 return b > Tier4BackEdgeThreshold * scale; | |
| 50 } | |
| 51 return true; | |
| 52 } | |
| 53 | |
| 54 // Simple methods are as good being compiled with C1 as C2. | |
| 55 // Determine if a given method is such a case. | |
| 56 bool SimpleThresholdPolicy::is_trivial(Method* method) { | |
| 57 if (method->is_accessor()) return true; | |
| 58 if (method->code() != NULL) { | |
| 59 MethodData* mdo = method->method_data(); | |
| 60 if (mdo != NULL && mdo->num_loops() == 0 && | |
| 61 (method->code_size() < 5 || (mdo->num_blocks() < 4) && (method->code_size() < 15))) { | |
| 62 return !mdo->would_profile(); | |
| 63 } | |
| 64 } | |
| 65 return false; | |
| 66 } | |
| 67 | |
| 68 #endif // SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_INLINE_HPP |
