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() || 58 method->is_constant_getter()) { 59 return true; 60 } 61 if (method->has_loops() || method->code_size() >= 15) { 62 return false; 63 } 64 MethodData* mdo = method->method_data(); 65 if (mdo != NULL && !mdo->would_profile() && 66 (method->code_size() < 5 || (mdo->num_blocks() < 4))) { 67 return true; 68 } 69 return false; 70 } 71 72 #endif // SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_INLINE_HPP