1 /* 2 * Copyright (c) 1999, 2014, 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/compile.hpp" 28 #include "opto/optoreg.hpp" 29 #include "opto/output.hpp" 30 #include "opto/runtime.hpp" 31 32 // register information defined by ADLC 33 extern const char register_save_policy[]; 34 extern const int register_save_type[]; 35 36 const char* C2Compiler::retry_no_subsuming_loads() { 37 return "retry without subsuming loads"; 38 } 39 const char* C2Compiler::retry_no_escape_analysis() { 40 return "retry without escape analysis"; 41 } 42 const char* C2Compiler::retry_class_loading_during_parsing() { 43 return "retry class loading during parsing"; 44 } 45 bool C2Compiler::init_c2_runtime() { 46 47 // Check assumptions used while running ADLC 48 Compile::adlc_verification(); 49 assert(REG_COUNT <= ConcreteRegisterImpl::number_of_registers, "incompatible register counts"); 50 51 for (int i = 0; i < ConcreteRegisterImpl::number_of_registers ; i++ ) { 52 OptoReg::vm2opto[i] = OptoReg::Bad; 53 } 54 55 for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(REG_COUNT); i = OptoReg::add(i,1) ) { 56 VMReg r = OptoReg::as_VMReg(i); 57 if (r->is_valid()) { 58 OptoReg::vm2opto[r->value()] = i; 59 } 60 } 61 62 // Check that runtime and architecture description agree on callee-saved-floats 63 bool callee_saved_floats = false; 64 for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(_last_Mach_Reg); i = OptoReg::add(i,1) ) { 65 // Is there a callee-saved float or double? 66 if( register_save_policy[i] == 'E' /* callee-saved */ && 67 (register_save_type[i] == Op_RegF || register_save_type[i] == Op_RegD) ) { 68 callee_saved_floats = true; 69 } 70 } 71 72 DEBUG_ONLY( Node::init_NodeProperty(); ) 73 74 Compile::pd_compiler2_init(); 75 76 CompilerThread* thread = CompilerThread::current(); 77 78 HandleMark handle_mark(thread); 79 return OptoRuntime::generate(thread->env()); 80 } 81 82 83 void C2Compiler::initialize() { 84 // The first compiler thread that gets here will initialize the 85 // small amount of global state (and runtime stubs) that C2 needs. 86 87 // There is a race possible once at startup and then we're fine 88 89 // Note that this is being called from a compiler thread not the 90 // main startup thread. 91 if (should_perform_init()) { 92 bool successful = C2Compiler::init_c2_runtime(); 93 int new_state = (successful) ? initialized : failed; 94 set_state(new_state); 95 } 96 } 97 98 void C2Compiler::compile_method(ciEnv* env, ciMethod* target, int entry_bci) { 99 assert(is_initialized(), "Compiler thread must be initialized"); 100 101 bool subsume_loads = SubsumeLoads; 102 bool do_escape_analysis = DoEscapeAnalysis && !env->should_retain_local_variables(); 103 bool eliminate_boxing = EliminateAutoBox; 104 while (!env->failing()) { 105 // Attempt to compile while subsuming loads into machine instructions. 106 Compile C(env, this, target, entry_bci, subsume_loads, do_escape_analysis, eliminate_boxing); 107 108 // Check result and retry if appropriate. 109 if (C.failure_reason() != NULL) { 110 if (C.failure_reason_is(retry_class_loading_during_parsing())) { 111 env->report_failure(C.failure_reason()); 112 continue; // retry 113 } 114 if (C.failure_reason_is(retry_no_subsuming_loads())) { 115 assert(subsume_loads, "must make progress"); 116 subsume_loads = false; 117 env->report_failure(C.failure_reason()); 118 continue; // retry 119 } 120 if (C.failure_reason_is(retry_no_escape_analysis())) { 121 assert(do_escape_analysis, "must make progress"); 122 do_escape_analysis = false; 123 env->report_failure(C.failure_reason()); 124 continue; // retry 125 } 126 if (C.has_boxed_value()) { 127 // Recompile without boxing elimination regardless failure reason. 128 assert(eliminate_boxing, "must make progress"); 129 eliminate_boxing = false; 130 env->report_failure(C.failure_reason()); 131 continue; // retry 132 } 133 // Pass any other failure reason up to the ciEnv. 134 // Note that serious, irreversible failures are already logged 135 // on the ciEnv via env->record_method_not_compilable(). 136 env->record_failure(C.failure_reason()); 137 } 138 if (StressRecompilation) { 139 if (subsume_loads) { 140 subsume_loads = false; 141 continue; // retry 142 } 143 if (do_escape_analysis) { 144 do_escape_analysis = false; 145 continue; // retry 146 } 147 } 148 149 // print inlining for last compilation only 150 C.dump_print_inlining(); 151 152 // No retry; just break the loop. 153 break; 154 } 155 } 156 157 158 void C2Compiler::print_timers() { 159 Compile::print_timers(); 160 } 161 162 int C2Compiler::initial_code_buffer_size() { 163 assert(SegmentedCodeCache, "Should be only used with a segmented code cache"); 164 return Compile::MAX_inst_size + Compile::MAX_locs_size + initial_const_capacity; 165 }