1 /* 2 * Copyright (c) 1999, 2011, 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 #ifdef TARGET_ARCH_MODEL_x86_32 29 # include "adfiles/ad_x86_32.hpp" 30 #endif 31 #ifdef TARGET_ARCH_MODEL_x86_64 32 # include "adfiles/ad_x86_64.hpp" 33 #endif 34 #ifdef TARGET_ARCH_MODEL_sparc 35 # include "adfiles/ad_sparc.hpp" 36 #endif 37 #ifdef TARGET_ARCH_MODEL_zero 38 # include "adfiles/ad_zero.hpp" 39 #endif 40 #ifdef TARGET_ARCH_MODEL_arm 41 # include "adfiles/ad_arm.hpp" 42 #endif 43 #ifdef TARGET_ARCH_MODEL_ppc 44 # include "adfiles/ad_ppc.hpp" 45 #endif 46 47 48 volatile int C2Compiler::_runtimes = uninitialized; 49 50 // register information defined by ADLC 51 extern const char register_save_policy[]; 52 extern const int register_save_type[]; 53 54 const char* C2Compiler::retry_no_subsuming_loads() { 55 return "retry without subsuming loads"; 56 } 57 const char* C2Compiler::retry_no_escape_analysis() { 58 return "retry without escape analysis"; 59 } 60 void C2Compiler::initialize_runtime() { 61 62 // Check assumptions used while running ADLC 63 Compile::adlc_verification(); 64 assert(REG_COUNT <= ConcreteRegisterImpl::number_of_registers, "incompatible register counts"); 65 66 for (int i = 0; i < ConcreteRegisterImpl::number_of_registers ; i++ ) { 67 OptoReg::vm2opto[i] = OptoReg::Bad; 68 } 69 70 for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(REG_COUNT); i = OptoReg::add(i,1) ) { 71 VMReg r = OptoReg::as_VMReg(i); 72 if (r->is_valid()) { 73 OptoReg::vm2opto[r->value()] = i; 74 } 75 } 76 77 // Check that runtime and architecture description agree on callee-saved-floats 78 bool callee_saved_floats = false; 79 for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(_last_Mach_Reg); i = OptoReg::add(i,1) ) { 80 // Is there a callee-saved float or double? 81 if( register_save_policy[i] == 'E' /* callee-saved */ && 82 (register_save_type[i] == Op_RegF || register_save_type[i] == Op_RegD) ) { 83 callee_saved_floats = true; 84 } 85 } 86 87 DEBUG_ONLY( Node::init_NodeProperty(); ) 88 89 Compile::pd_compiler2_init(); 90 91 CompilerThread* thread = CompilerThread::current(); 92 93 HandleMark handle_mark(thread); 94 95 OptoRuntime::generate(thread->env()); 96 97 } 98 99 100 void C2Compiler::initialize() { 101 102 // This method can only be called once per C2Compiler object 103 // The first compiler thread that gets here will initialize the 104 // small amount of global state (and runtime stubs) that c2 needs. 105 106 // There is a race possible once at startup and then we're fine 107 108 // Note that this is being called from a compiler thread not the 109 // main startup thread. 110 111 if (_runtimes != initialized) { 112 initialize_runtimes( initialize_runtime, &_runtimes); 113 } 114 115 // Mark this compiler object as ready to roll 116 mark_initialized(); 117 } 118 119 void C2Compiler::compile_method(ciEnv* env, 120 ciMethod* target, 121 int entry_bci) { 122 if (!is_initialized()) { 123 initialize(); 124 } 125 bool subsume_loads = SubsumeLoads; 126 bool do_escape_analysis = DoEscapeAnalysis && 127 !env->jvmti_can_access_local_variables(); 128 bool eliminate_boxing = EliminateAutoBox; 129 while (!env->failing()) { 130 // Attempt to compile while subsuming loads into machine instructions. 131 Compile C(env, this, target, entry_bci, subsume_loads, do_escape_analysis, eliminate_boxing); 132 133 134 // Check result and retry if appropriate. 135 if (C.failure_reason() != NULL) { 136 if (C.failure_reason_is(retry_no_subsuming_loads())) { 137 assert(subsume_loads, "must make progress"); 138 subsume_loads = false; 139 continue; // retry 140 } 141 if (C.failure_reason_is(retry_no_escape_analysis())) { 142 assert(do_escape_analysis, "must make progress"); 143 do_escape_analysis = false; 144 continue; // retry 145 } 146 if (C.has_boxed_value()) { 147 // Recompile without boxing elimination regardless failure reason. 148 assert(eliminate_boxing, "must make progress"); 149 eliminate_boxing = false; 150 continue; // retry 151 } 152 // Pass any other failure reason up to the ciEnv. 153 // Note that serious, irreversible failures are already logged 154 // on the ciEnv via env->record_method_not_compilable(). 155 env->record_failure(C.failure_reason()); 156 } 157 if (StressRecompilation) { 158 if (subsume_loads) { 159 subsume_loads = false; 160 continue; // retry 161 } 162 if (do_escape_analysis) { 163 do_escape_analysis = false; 164 continue; // retry 165 } 166 } 167 168 // No retry; just break the loop. 169 break; 170 } 171 } 172 173 174 void C2Compiler::print_timers() { 175 // do nothing 176 }