1 /* 2 * Copyright (c) 1999, 2013, 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 bool C2Compiler::init_c2_runtime() { 53 54 // Check assumptions used while running ADLC 55 Compile::adlc_verification(); 56 assert(REG_COUNT <= ConcreteRegisterImpl::number_of_registers, "incompatible register counts"); 57 58 for (int i = 0; i < ConcreteRegisterImpl::number_of_registers ; i++ ) { 59 OptoReg::vm2opto[i] = OptoReg::Bad; 60 } 61 62 for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(REG_COUNT); i = OptoReg::add(i,1) ) { 63 VMReg r = OptoReg::as_VMReg(i); 64 if (r->is_valid()) { 65 OptoReg::vm2opto[r->value()] = i; 66 } 67 } 68 69 // Check that runtime and architecture description agree on callee-saved-floats 70 bool callee_saved_floats = false; 71 for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(_last_Mach_Reg); i = OptoReg::add(i,1) ) { 72 // Is there a callee-saved float or double? 73 if( register_save_policy[i] == 'E' /* callee-saved */ && 74 (register_save_type[i] == Op_RegF || register_save_type[i] == Op_RegD) ) { 75 callee_saved_floats = true; 76 } 77 } 78 79 DEBUG_ONLY( Node::init_NodeProperty(); ) 80 81 Compile::pd_compiler2_init(); 82 83 CompilerThread* thread = CompilerThread::current(); 84 85 HandleMark handle_mark(thread); 86 return OptoRuntime::generate(thread->env()); 87 } 88 89 90 void C2Compiler::initialize() { 91 // The first compiler thread that gets here will initialize the 92 // small amount of global state (and runtime stubs) that C2 needs. 93 94 // There is a race possible once at startup and then we're fine 95 96 // Note that this is being called from a compiler thread not the 97 // main startup thread. 98 if (should_perform_init()) { 99 bool successful = C2Compiler::init_c2_runtime(); 100 int new_state = (successful) ? initialized : failed; 101 set_state(new_state); 102 } 103 } 104 105 void C2Compiler::compile_method(ciEnv* env, ciMethod* target, int entry_bci) { 106 assert(is_initialized(), "Compiler thread must be initialized"); 107 108 bool subsume_loads = SubsumeLoads; 109 bool do_escape_analysis = DoEscapeAnalysis && !env->jvmti_can_access_local_variables(); 110 bool eliminate_boxing = EliminateAutoBox; 111 while (!env->failing()) { 112 // Attempt to compile while subsuming loads into machine instructions. 113 Compile C(env, this, target, entry_bci, subsume_loads, do_escape_analysis, eliminate_boxing); 114 115 116 // Check result and retry if appropriate. 117 if (C.failure_reason() != NULL) { 118 if (C.failure_reason_is(retry_no_subsuming_loads())) { 119 assert(subsume_loads, "must make progress"); 120 subsume_loads = false; 121 continue; // retry 122 } 123 if (C.failure_reason_is(retry_no_escape_analysis())) { 124 assert(do_escape_analysis, "must make progress"); 125 do_escape_analysis = false; 126 continue; // retry 127 } 128 if (C.has_boxed_value()) { 129 // Recompile without boxing elimination regardless failure reason. 130 assert(eliminate_boxing, "must make progress"); 131 eliminate_boxing = false; 132 continue; // retry 133 } 134 // Pass any other failure reason up to the ciEnv. 135 // Note that serious, irreversible failures are already logged 136 // on the ciEnv via env->record_method_not_compilable(). 137 env->record_failure(C.failure_reason()); 138 } 139 if (StressRecompilation) { 140 if (subsume_loads) { 141 subsume_loads = false; 142 continue; // retry 143 } 144 if (do_escape_analysis) { 145 do_escape_analysis = false; 146 continue; // retry 147 } 148 } 149 150 // No retry; just break the loop. 151 break; 152 } 153 } 154 155 156 void C2Compiler::print_timers() { 157 // do nothing 158 }