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1 /*
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2 * Copyright 1999-2007 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 #include "incls/_precompiled.incl"
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26 #include "incls/_c2compiler.cpp.incl"
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27
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28
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29 volatile int C2Compiler::_runtimes = uninitialized;
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30
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31 // register information defined by ADLC
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32 extern const char register_save_policy[];
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33 extern const int register_save_type[];
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34
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35 const char* C2Compiler::retry_no_subsuming_loads() {
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36 return "retry without subsuming loads";
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37 }
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38 void C2Compiler::initialize_runtime() {
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39
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40 // Check assumptions used while running ADLC
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41 Compile::adlc_verification();
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42 assert(REG_COUNT <= ConcreteRegisterImpl::number_of_registers, "incompatible register counts");
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43
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44 for (int i = 0; i < ConcreteRegisterImpl::number_of_registers ; i++ ) {
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45 OptoReg::vm2opto[i] = OptoReg::Bad;
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46 }
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47
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48 for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(REG_COUNT); i = OptoReg::add(i,1) ) {
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49 VMReg r = OptoReg::as_VMReg(i);
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50 if (r->is_valid()) {
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51 OptoReg::vm2opto[r->value()] = i;
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52 }
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53 }
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54
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55 // Check that runtime and architecture description agree on callee-saved-floats
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56 bool callee_saved_floats = false;
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57 for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(_last_Mach_Reg); i = OptoReg::add(i,1) ) {
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58 // Is there a callee-saved float or double?
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59 if( register_save_policy[i] == 'E' /* callee-saved */ &&
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60 (register_save_type[i] == Op_RegF || register_save_type[i] == Op_RegD) ) {
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61 callee_saved_floats = true;
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62 }
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63 }
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64
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65 DEBUG_ONLY( Node::init_NodeProperty(); )
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66
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67 Compile::pd_compiler2_init();
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68
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69 CompilerThread* thread = CompilerThread::current();
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70
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71 HandleMark handle_mark(thread);
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72
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73 OptoRuntime::generate(thread->env());
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74
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75 }
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76
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77
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78 void C2Compiler::initialize() {
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79
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80 // This method can only be called once per C2Compiler object
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81 // The first compiler thread that gets here will initialize the
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82 // small amount of global state (and runtime stubs) that c2 needs.
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83
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84 // There is a race possible once at startup and then we're fine
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85
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86 // Note that this is being called from a compiler thread not the
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87 // main startup thread.
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88
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89 if (_runtimes != initialized) {
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90 initialize_runtimes( initialize_runtime, &_runtimes);
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91 }
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92
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93 // Mark this compiler object as ready to roll
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94 mark_initialized();
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95 }
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96
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97 void C2Compiler::compile_method(ciEnv* env,
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98 ciMethod* target,
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99 int entry_bci) {
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100 if (!is_initialized()) {
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101 initialize();
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102 }
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103 bool subsume_loads = true;
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104 while (!env->failing()) {
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105 // Attempt to compile while subsuming loads into machine instructions.
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106 Compile C(env, this, target, entry_bci, subsume_loads);
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107
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108 // Check result and retry if appropriate.
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109 if (C.failure_reason() != NULL) {
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110 if (C.failure_reason_is(retry_no_subsuming_loads())) {
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111 assert(subsume_loads, "must make progress");
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112 subsume_loads = false;
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113 continue; // retry
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114 }
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115 // Pass any other failure reason up to the ciEnv.
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116 // Note that serious, irreversible failures are already logged
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117 // on the ciEnv via env->record_method_not_compilable().
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118 env->record_failure(C.failure_reason());
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119 }
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120
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121 // No retry; just break the loop.
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122 break;
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123 }
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124 }
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125
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126
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127 void C2Compiler::print_timers() {
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128 // do nothing
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129 }
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