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 "incls/_precompiled.incl" 26 #include "incls/_c2compiler.cpp.incl" 27 28 29 volatile int C2Compiler::_runtimes = uninitialized; 30 31 // register information defined by ADLC 32 extern const char register_save_policy[]; 33 extern const int register_save_type[]; 34 35 const char* C2Compiler::retry_no_subsuming_loads() { 36 return "retry without subsuming loads"; 37 } 38 const char* C2Compiler::retry_no_escape_analysis() { 39 return "retry without escape analysis"; 40 } 41 void C2Compiler::initialize_runtime() { 42 43 // Check assumptions used while running ADLC 44 Compile::adlc_verification(); 45 assert(REG_COUNT <= ConcreteRegisterImpl::number_of_registers, "incompatible register counts"); 46 47 for (int i = 0; i < ConcreteRegisterImpl::number_of_registers ; i++ ) { 48 OptoReg::vm2opto[i] = OptoReg::Bad; 49 } 50 51 for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(REG_COUNT); i = OptoReg::add(i,1) ) { 52 VMReg r = OptoReg::as_VMReg(i); 53 if (r->is_valid()) { 54 OptoReg::vm2opto[r->value()] = i; 55 } 56 } 57 58 // Check that runtime and architecture description agree on callee-saved-floats 59 bool callee_saved_floats = false; 60 for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(_last_Mach_Reg); i = OptoReg::add(i,1) ) { 61 // Is there a callee-saved float or double? 62 if( register_save_policy[i] == 'E' /* callee-saved */ && 63 (register_save_type[i] == Op_RegF || register_save_type[i] == Op_RegD) ) { 64 callee_saved_floats = true; 65 } 66 } 67 68 DEBUG_ONLY( Node::init_NodeProperty(); ) 69 70 Compile::pd_compiler2_init(); 71 72 CompilerThread* thread = CompilerThread::current(); 73 74 HandleMark handle_mark(thread); 75 76 OptoRuntime::generate(thread->env()); 77 78 } 79 80 81 void C2Compiler::initialize() { 82 83 // This method can only be called once per C2Compiler object 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 92 if (_runtimes != initialized) { 93 initialize_runtimes( initialize_runtime, &_runtimes); 94 } 95 96 // Mark this compiler object as ready to roll 97 mark_initialized(); 98 } 99 100 void C2Compiler::compile_method(ciEnv* env, 101 ciMethod* target, 102 int entry_bci) { 103 if (!is_initialized()) { 104 initialize(); 105 } 106 bool subsume_loads = SubsumeLoads; 107 bool do_escape_analysis = DoEscapeAnalysis && 108 !env->jvmti_can_access_local_variables(); 109 while (!env->failing()) { 110 // Attempt to compile while subsuming loads into machine instructions. 111 Compile C(env, this, target, entry_bci, subsume_loads, do_escape_analysis); 112 113 114 // Check result and retry if appropriate. 115 if (C.failure_reason() != NULL) { 116 if (C.failure_reason_is(retry_no_subsuming_loads())) { 117 assert(subsume_loads, "must make progress"); 118 subsume_loads = false; 119 continue; // retry 120 } 121 if (C.failure_reason_is(retry_no_escape_analysis())) { 122 assert(do_escape_analysis, "must make progress"); 123 do_escape_analysis = false; 124 continue; // retry 125 } 126 // Pass any other failure reason up to the ciEnv. 127 // Note that serious, irreversible failures are already logged 128 // on the ciEnv via env->record_method_not_compilable(). 129 env->record_failure(C.failure_reason()); 130 } 131 if (StressRecompilation) { 132 if (subsume_loads) { 133 subsume_loads = false; 134 continue; // retry 135 } 136 if (do_escape_analysis) { 137 do_escape_analysis = false; 138 continue; // retry 139 } 140 } 141 142 // No retry; just break the loop. 143 break; 144 } 145 } 146 147 148 void C2Compiler::print_timers() { 149 // do nothing 150 }