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 #include "compiler/compilerOracle.hpp" 29 30 template<CompLevel level> 31 bool SimpleThresholdPolicy::call_predicate_helper(int i, int b, double scale, Method* method) { 32 double threshold_scaling; 33 if (CompilerOracle::has_option_value(method, "CompileThresholdScaling", threshold_scaling)) { 34 scale *= threshold_scaling; 35 } 36 switch(level) { 37 case CompLevel_none: 38 case CompLevel_limited_profile: 39 return (i >= Tier3InvocationThreshold * scale) || 40 (i >= Tier3MinInvocationThreshold * scale && i + b >= Tier3CompileThreshold * scale); 41 case CompLevel_full_profile: 42 return (i >= Tier4InvocationThreshold * scale) || 43 (i >= Tier4MinInvocationThreshold * scale && i + b >= Tier4CompileThreshold * scale); 44 } 45 return true; 46 } 47 48 template<CompLevel level> 49 bool SimpleThresholdPolicy::loop_predicate_helper(int i, int b, double scale, Method* method) { 50 double threshold_scaling; 51 if (CompilerOracle::has_option_value(method, "CompileThresholdScaling", threshold_scaling)) { 52 scale *= threshold_scaling; 53 } 54 switch(level) { 55 case CompLevel_none: 56 case CompLevel_limited_profile: 57 return b >= Tier3BackEdgeThreshold * scale; 58 case CompLevel_full_profile: 59 return b >= Tier4BackEdgeThreshold * scale; 60 } 61 return true; 62 } 63 64 // Simple methods are as good being compiled with C1 as C2. 65 // Determine if a given method is such a case. 66 bool SimpleThresholdPolicy::is_trivial(Method* method) { 67 if (method->is_accessor() || 68 method->is_constant_getter()) { 69 return true; 70 } 71 if (method->has_loops() || method->code_size() >= 15) { 72 return false; 73 } 74 MethodData* mdo = method->method_data(); 75 if (mdo != NULL && !mdo->would_profile() && 76 (method->code_size() < 5 || (mdo->num_blocks() < 4))) { 77 return true; 78 } 79 return false; 80 } 81 82 #endif // SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_INLINE_HPP