Mercurial > hg > graal-jvmci-8

annotate src/share/vm/opto/c2compiler.cpp @ 23974:f13e777eb255

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Merge with jdk8u111-b14
author Tom Rodriguez <tom.rodriguez@oracle.com>
date Wed, 16 Nov 2016 12:32:54 -0800
parents dd9cc155639c 3e1cd663c2d3
children
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1 /*
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2 * Copyright (c) 1999, 2015, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #include "precompiled.hpp"
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26 #include "opto/c2compiler.hpp"
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27 #include "opto/runtime.hpp"
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28 #if defined AD_MD_HPP
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29 # include AD_MD_HPP
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30 #elif defined TARGET_ARCH_MODEL_x86_32
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31 # include "adfiles/ad_x86_32.hpp"
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32 #elif defined TARGET_ARCH_MODEL_x86_64
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33 # include "adfiles/ad_x86_64.hpp"
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34 #elif defined TARGET_ARCH_MODEL_sparc
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35 # include "adfiles/ad_sparc.hpp"
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36 #elif defined TARGET_ARCH_MODEL_zero
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37 # include "adfiles/ad_zero.hpp"
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38 #elif defined TARGET_ARCH_MODEL_ppc_64
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39 # include "adfiles/ad_ppc_64.hpp"
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40 #endif
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41
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42 // register information defined by ADLC
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43 extern const char register_save_policy[];
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44 extern const int register_save_type[];
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45
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46 const char* C2Compiler::retry_no_subsuming_loads() {
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47 return "retry without subsuming loads";
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48 }
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49 const char* C2Compiler::retry_no_escape_analysis() {
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50 return "retry without escape analysis";
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51 }
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52 const char* C2Compiler::retry_class_loading_during_parsing() {
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53 return "retry class loading during parsing";
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54 }
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55 bool C2Compiler::init_c2_runtime() {
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56
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57 // Check assumptions used while running ADLC
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58 Compile::adlc_verification();
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59 assert(REG_COUNT <= ConcreteRegisterImpl::number_of_registers, "incompatible register counts");
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60
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61 for (int i = 0; i < ConcreteRegisterImpl::number_of_registers ; i++ ) {
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62 OptoReg::vm2opto[i] = OptoReg::Bad;
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63 }
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64
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65 for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(REG_COUNT); i = OptoReg::add(i,1) ) {
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66 VMReg r = OptoReg::as_VMReg(i);
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67 if (r->is_valid()) {
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68 OptoReg::vm2opto[r->value()] = i;
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69 }
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70 }
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71
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72 // Check that runtime and architecture description agree on callee-saved-floats
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73 bool callee_saved_floats = false;
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74 for( OptoReg::Name i=OptoReg::Name(0); i<OptoReg::Name(_last_Mach_Reg); i = OptoReg::add(i,1) ) {
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75 // Is there a callee-saved float or double?
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76 if( register_save_policy[i] == 'E' /* callee-saved */ &&
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77 (register_save_type[i] == Op_RegF || register_save_type[i] == Op_RegD) ) {
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78 callee_saved_floats = true;
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79 }
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80 }
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81
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82 DEBUG_ONLY( Node::init_NodeProperty(); )
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83
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84 Compile::pd_compiler2_init();
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85
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86 CompilerThread* thread = CompilerThread::current();
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87
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88 HandleMark handle_mark(thread);
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89 return OptoRuntime::generate(thread->env());
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90 }
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91
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92
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93 void C2Compiler::initialize() {
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94 // The first compiler thread that gets here will initialize the
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95 // small amount of global state (and runtime stubs) that C2 needs.
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96
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97 // There is a race possible once at startup and then we're fine
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98
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99 // Note that this is being called from a compiler thread not the
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100 // main startup thread.
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101 if (should_perform_init()) {
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102 bool successful = C2Compiler::init_c2_runtime();
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103 int new_state = (successful) ? initialized : failed;
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104 set_state(new_state);
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105 }
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106 }
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107
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108 void C2Compiler::compile_method(ciEnv* env, ciMethod* target, int entry_bci) {
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109 assert(is_initialized(), "Compiler thread must be initialized");
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110
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111 bool subsume_loads = SubsumeLoads;
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112 bool do_escape_analysis = DoEscapeAnalysis && !env->jvmti_can_access_local_variables();
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113 bool eliminate_boxing = EliminateAutoBox;
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114 while (!env->failing()) {
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115 // Attempt to compile while subsuming loads into machine instructions.
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116 Compile C(env, this, target, entry_bci, subsume_loads, do_escape_analysis, eliminate_boxing);
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117
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118
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119 // Check result and retry if appropriate.
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120 if (C.failure_reason() != NULL) {
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121 if (C.failure_reason_is(retry_class_loading_during_parsing())) {
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122 env->record_failure(C.failure_reason());
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123 continue; // retry
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124 }
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125 if (C.failure_reason_is(retry_no_subsuming_loads())) {
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126 assert(subsume_loads, "must make progress");
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127 subsume_loads = false;
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128 continue; // retry
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129 }
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130 if (C.failure_reason_is(retry_no_escape_analysis())) {
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131 assert(do_escape_analysis, "must make progress");
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132 do_escape_analysis = false;
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133 continue; // retry
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134 }
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135 if (C.has_boxed_value()) {
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136 // Recompile without boxing elimination regardless failure reason.
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137 assert(eliminate_boxing, "must make progress");
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138 eliminate_boxing = false;
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139 continue; // retry
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140 }
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141 // Pass any other failure reason up to the ciEnv.
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142 // Note that serious, irreversible failures are already logged
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143 // on the ciEnv via env->record_method_not_compilable().
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144 env->record_failure(C.failure_reason());
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145 }
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146 if (StressRecompilation) {
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147 if (subsume_loads) {
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148 subsume_loads = false;
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149 continue; // retry
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150 }
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151 if (do_escape_analysis) {
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152 do_escape_analysis = false;
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153 continue; // retry
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154 }
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155 }
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156
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157 // No retry; just break the loop.
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158 break;
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159 }
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160 }
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161
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162
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163 void C2Compiler::print_timers() {
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164 // do nothing
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165 }