1 /* 2 * Copyright (c) 2001, 2018, 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 #include "oops/method.inline.hpp" 30 31 #ifdef TIERED 32 33 template<CompLevel level> 34 bool SimpleThresholdPolicy::call_predicate_helper(int i, int b, double scale, Method* method) { 35 double threshold_scaling; 36 if (CompilerOracle::has_option_value(method, "CompileThresholdScaling", threshold_scaling)) { 37 scale *= threshold_scaling; 38 } 39 switch(level) { 40 case CompLevel_aot: 41 return (i >= Tier3AOTInvocationThreshold * scale) || 42 (i >= Tier3AOTMinInvocationThreshold * scale && i + b >= Tier3AOTCompileThreshold * scale); 43 case CompLevel_none: 44 case CompLevel_limited_profile: 45 return (i >= Tier3InvocationThreshold * scale) || 46 (i >= Tier3MinInvocationThreshold * scale && i + b >= Tier3CompileThreshold * scale); 47 case CompLevel_full_profile: 48 return (i >= Tier4InvocationThreshold * scale) || 49 (i >= Tier4MinInvocationThreshold * scale && i + b >= Tier4CompileThreshold * scale); 50 } 51 return true; 52 } 53 54 template<CompLevel level> 55 bool SimpleThresholdPolicy::loop_predicate_helper(int i, int b, double scale, Method* method) { 56 double threshold_scaling; 57 if (CompilerOracle::has_option_value(method, "CompileThresholdScaling", threshold_scaling)) { 58 scale *= threshold_scaling; 59 } 60 switch(level) { 61 case CompLevel_aot: 62 return b >= Tier3AOTBackEdgeThreshold * scale; 63 case CompLevel_none: 64 case CompLevel_limited_profile: 65 return b >= Tier3BackEdgeThreshold * scale; 66 case CompLevel_full_profile: 67 return b >= Tier4BackEdgeThreshold * scale; 68 } 69 return true; 70 } 71 72 // Simple methods are as good being compiled with C1 as C2. 73 // Determine if a given method is such a case. 74 bool SimpleThresholdPolicy::is_trivial(Method* method) { 75 if (method->is_accessor() || 76 method->is_constant_getter()) { 77 return true; 78 } 79 #if INCLUDE_JVMCI 80 if (UseJVMCICompiler) { 81 AbstractCompiler* comp = CompileBroker::compiler(CompLevel_full_optimization); 82 if (TieredCompilation && comp != NULL && comp->is_trivial(method)) { 83 return true; 84 } 85 } 86 #endif 87 if (method->has_loops() || method->code_size() >= 15) { 88 return false; 89 } 90 MethodData* mdo = method->method_data(); 91 if (mdo != NULL && !mdo->would_profile() && 92 (method->code_size() < 5 || (mdo->num_blocks() < 4))) { 93 return true; 94 } 95 return false; 96 } 97 98 inline CompLevel SimpleThresholdPolicy::comp_level(Method* method) { 99 CompiledMethod *nm = method->code(); 100 if (nm != NULL && nm->is_in_use()) { 101 return (CompLevel)nm->comp_level(); 102 } 103 return CompLevel_none; 104 } 105 106 #endif // TIERED 107 108 #endif // SHARE_VM_RUNTIME_SIMPLETHRESHOLDPOLICY_INLINE_HPP