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 #ifdef TIERED 31 32 template<CompLevel level> 33 bool SimpleThresholdPolicy::call_predicate_helper(int i, int b, double scale, Method* method) { 34 double threshold_scaling; 35 if (CompilerOracle::has_option_value(method, "CompileThresholdScaling", threshold_scaling)) { 36 scale *= threshold_scaling; 37 } 38 switch(level) { 39 case CompLevel_aot: 40 return (i >= Tier3AOTInvocationThreshold * scale) || 41 (i >= Tier3AOTMinInvocationThreshold * scale && i + b >= Tier3AOTCompileThreshold * scale); 42 case CompLevel_none: 43 case CompLevel_limited_profile: 44 return (i >= Tier3InvocationThreshold * scale) || 45 (i >= Tier3MinInvocationThreshold * scale && i + b >= Tier3CompileThreshold * scale); 46 case CompLevel_full_profile: 47 return (i >= Tier4InvocationThreshold * scale) || 48 (i >= Tier4MinInvocationThreshold * scale && i + b >= Tier4CompileThreshold * scale); 49 } 50 return true; 51 } 52 53 template<CompLevel level> 54 bool SimpleThresholdPolicy::loop_predicate_helper(int i, int b, double scale, Method* method) { 55 double threshold_scaling; 56 if (CompilerOracle::has_option_value(method, "CompileThresholdScaling", threshold_scaling)) { 57 scale *= threshold_scaling; 58 } 59 switch(level) { 60 case CompLevel_aot: 61 return b >= Tier3AOTBackEdgeThreshold * scale; 62 case CompLevel_none: 63 case CompLevel_limited_profile: 64 return b >= Tier3BackEdgeThreshold * scale; 65 case CompLevel_full_profile: 66 return b >= Tier4BackEdgeThreshold * scale; 67 } 68 return true; 69 } 70 71 // Simple methods are as good being compiled with C1 as C2. 72 // Determine if a given method is such a case. 73 bool SimpleThresholdPolicy::is_trivial(Method* method) { 74 if (method->is_accessor() || 75 method->is_constant_getter()) { 76 return true; 77 } 78 #if INCLUDE_JVMCI 79 if (UseJVMCICompiler) { 80 if (TieredCompilation && CompileBroker::compiler(CompLevel_full_optimization) != NULL && 81 CompileBroker::compiler(CompLevel_full_optimization)->is_trivial(method)) { 82 return true; 83 } 84 } 85 #endif 86 if (method->has_loops() || method->code_size() >= 15) { 87 return false; 88 } 89 MethodData* mdo = method->method_data(); 90 if (mdo != NULL && !mdo->would_profile() && 91 (method->code_size() < 5 || (mdo->num_blocks() < 4))) { 92 return true; 93 } 94 return false; 95 } 96 97 #endif // TIERED 98 99 #endif // SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_INLINE_HPP