1 /* 2 * Copyright (c) 1999, 2015, 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 #include "precompiled.hpp" 26 #include "opto/c2compiler.hpp" 27 #include "opto/runtime.hpp" 28 #if defined AD_MD_HPP 29 # include AD_MD_HPP 30 #elif defined TARGET_ARCH_MODEL_x86_32 31 # include "adfiles/ad_x86_32.hpp" 32 #elif defined TARGET_ARCH_MODEL_x86_64 33 # include "adfiles/ad_x86_64.hpp" 34 #elif defined TARGET_ARCH_MODEL_sparc 35 # include "adfiles/ad_sparc.hpp" 36 #elif defined TARGET_ARCH_MODEL_zero 37 # include "adfiles/ad_zero.hpp" 38 #elif defined TARGET_ARCH_MODEL_ppc_64 39 # include "adfiles/ad_ppc_64.hpp" 40 #endif 41 42 // register information defined by ADLC 43 extern const char register_save_policy[]; 44 extern const int register_save_type[]; 45 46 const char* C2Compiler::retry_no_subsuming_loads() { 47 return "retry without subsuming loads"; 48 } 49 const char* C2Compiler::retry_no_escape_analysis() { 50 return "retry without escape analysis"; 51 } 52 const char* C2Compiler::retry_class_loading_during_parsing() { 53 return "retry class loading during parsing"; 54 } 55 bool C2Compiler::init_c2_runtime() { 56 57 // Check assumptions used while running ADLC 58 Compile::adlc_verification(); 59 assert(REG_COUNT <= ConcreteRegisterImpl::number_of_registers, "incompatible register counts"); 60 61 for (int i = 0; i < ConcreteRegisterImpl::number_of_registers ; i++ ) { 62 OptoReg::vm2opto[i] = OptoReg::Bad; 63 } 64 65 for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(REG_COUNT); i = OptoReg::add(i,1) ) { 66 VMReg r = OptoReg::as_VMReg(i); 67 if (r->is_valid()) { 68 OptoReg::vm2opto[r->value()] = i; 69 } 70 } 71 72 // Check that runtime and architecture description agree on callee-saved-floats 73 bool callee_saved_floats = false; 74 for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(_last_Mach_Reg); i = OptoReg::add(i,1) ) { 75 // Is there a callee-saved float or double? 76 if( register_save_policy[i] == 'E' /* callee-saved */ && 77 (register_save_type[i] == Op_RegF || register_save_type[i] == Op_RegD) ) { 78 callee_saved_floats = true; 79 } 80 } 81 82 DEBUG_ONLY( Node::init_NodeProperty(); ) 83 84 Compile::pd_compiler2_init(); 85 86 CompilerThread* thread = CompilerThread::current(); 87 88 HandleMark handle_mark(thread); 89 return OptoRuntime::generate(thread->env()); 90 } 91 92 93 void C2Compiler::initialize() { 94 // The first compiler thread that gets here will initialize the 95 // small amount of global state (and runtime stubs) that C2 needs. 96 97 // There is a race possible once at startup and then we're fine 98 99 // Note that this is being called from a compiler thread not the 100 // main startup thread. 101 if (should_perform_init()) { 102 bool successful = C2Compiler::init_c2_runtime(); 103 int new_state = (successful) ? initialized : failed; 104 set_state(new_state); 105 } 106 } 107 108 void C2Compiler::compile_method(ciEnv* env, ciMethod* target, int entry_bci) { 109 assert(is_initialized(), "Compiler thread must be initialized"); 110 111 bool subsume_loads = SubsumeLoads; 112 bool do_escape_analysis = DoEscapeAnalysis && !env->should_retain_local_variables(); 113 bool eliminate_boxing = EliminateAutoBox; 114 while (!env->failing()) { 115 // Attempt to compile while subsuming loads into machine instructions. 116 Compile C(env, this, target, entry_bci, subsume_loads, do_escape_analysis, eliminate_boxing); 117 118 119 // Check result and retry if appropriate. 120 if (C.failure_reason() != NULL) { 121 if (C.failure_reason_is(retry_class_loading_during_parsing())) { 122 env->record_failure(C.failure_reason()); 123 continue; // retry 124 } 125 if (C.failure_reason_is(retry_no_subsuming_loads())) { 126 assert(subsume_loads, "must make progress"); 127 subsume_loads = false; 128 continue; // retry 129 } 130 if (C.failure_reason_is(retry_no_escape_analysis())) { 131 assert(do_escape_analysis, "must make progress"); 132 do_escape_analysis = false; 133 continue; // retry 134 } 135 if (C.has_boxed_value()) { 136 // Recompile without boxing elimination regardless failure reason. 137 assert(eliminate_boxing, "must make progress"); 138 eliminate_boxing = false; 139 continue; // retry 140 } 141 // Pass any other failure reason up to the ciEnv. 142 // Note that serious, irreversible failures are already logged 143 // on the ciEnv via env->record_method_not_compilable(). 144 env->record_failure(C.failure_reason()); 145 } 146 if (StressRecompilation) { 147 if (subsume_loads) { 148 subsume_loads = false; 149 continue; // retry 150 } 151 if (do_escape_analysis) { 152 do_escape_analysis = false; 153 continue; // retry 154 } 155 } 156 157 // No retry; just break the loop. 158 break; 159 } 160 } 161 162 163 void C2Compiler::print_timers() { 164 // do nothing 165 }