1 /* 2 * Copyright (c) 1999, 2010, 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 41 42 volatile int C2Compiler::_runtimes = uninitialized; 43 44 // register information defined by ADLC 45 extern const char register_save_policy[]; 46 extern const int register_save_type[]; 47 48 const char* C2Compiler::retry_no_subsuming_loads() { 49 return "retry without subsuming loads"; 50 } 51 const char* C2Compiler::retry_no_escape_analysis() { 52 return "retry without escape analysis"; 53 } 54 void C2Compiler::initialize_runtime() { 55 56 // Check assumptions used while running ADLC 57 Compile::adlc_verification(); 58 assert(REG_COUNT <= ConcreteRegisterImpl::number_of_registers, "incompatible register counts"); 59 60 for (int i = 0; i < ConcreteRegisterImpl::number_of_registers ; i++ ) { 61 OptoReg::vm2opto[i] = OptoReg::Bad; 62 } 63 64 for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(REG_COUNT); i = OptoReg::add(i,1) ) { 65 VMReg r = OptoReg::as_VMReg(i); 66 if (r->is_valid()) { 67 OptoReg::vm2opto[r->value()] = i; 68 } 69 } 70 71 // Check that runtime and architecture description agree on callee-saved-floats 72 bool callee_saved_floats = false; 73 for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(_last_Mach_Reg); i = OptoReg::add(i,1) ) { 74 // Is there a callee-saved float or double? 75 if( register_save_policy[i] == 'E' /* callee-saved */ && 76 (register_save_type[i] == Op_RegF || register_save_type[i] == Op_RegD) ) { 77 callee_saved_floats = true; 78 } 79 } 80 81 DEBUG_ONLY( Node::init_NodeProperty(); ) 82 83 Compile::pd_compiler2_init(); 84 85 CompilerThread* thread = CompilerThread::current(); 86 87 HandleMark handle_mark(thread); 88 89 OptoRuntime::generate(thread->env()); 90 91 } 92 93 94 void C2Compiler::initialize() { 95 96 // This method can only be called once per C2Compiler object 97 // The first compiler thread that gets here will initialize the 98 // small amount of global state (and runtime stubs) that c2 needs. 99 100 // There is a race possible once at startup and then we're fine 101 102 // Note that this is being called from a compiler thread not the 103 // main startup thread. 104 105 if (_runtimes != initialized) { 106 initialize_runtimes( initialize_runtime, &_runtimes); 107 } 108 109 // Mark this compiler object as ready to roll 110 mark_initialized(); 111 } 112 113 void C2Compiler::compile_method(ciEnv* env, 114 ciMethod* target, 115 int entry_bci) { 116 if (!is_initialized()) { 117 initialize(); 118 } 119 bool subsume_loads = SubsumeLoads; 120 bool do_escape_analysis = DoEscapeAnalysis && 121 !env->jvmti_can_access_local_variables(); 122 while (!env->failing()) { 123 // Attempt to compile while subsuming loads into machine instructions. 124 Compile C(env, this, target, entry_bci, subsume_loads, do_escape_analysis); 125 126 127 // Check result and retry if appropriate. 128 if (C.failure_reason() != NULL) { 129 if (C.failure_reason_is(retry_no_subsuming_loads())) { 130 assert(subsume_loads, "must make progress"); 131 subsume_loads = false; 132 continue; // retry 133 } 134 if (C.failure_reason_is(retry_no_escape_analysis())) { 135 assert(do_escape_analysis, "must make progress"); 136 do_escape_analysis = false; 137 continue; // retry 138 } 139 // Pass any other failure reason up to the ciEnv. 140 // Note that serious, irreversible failures are already logged 141 // on the ciEnv via env->record_method_not_compilable(). 142 env->record_failure(C.failure_reason()); 143 } 144 if (StressRecompilation) { 145 if (subsume_loads) { 146 subsume_loads = false; 147 continue; // retry 148 } 149 if (do_escape_analysis) { 150 do_escape_analysis = false; 151 continue; // retry 152 } 153 } 154 155 // No retry; just break the loop. 156 break; 157 } 158 } 159 160 161 void C2Compiler::print_timers() { 162 // do nothing 163 }