0
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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/_c1_Compilation.cpp.incl"
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27
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28
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29 typedef enum {
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30 _t_compile,
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31 _t_setup,
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32 _t_optimizeIR,
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33 _t_buildIR,
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34 _t_emit_lir,
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35 _t_linearScan,
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36 _t_lirGeneration,
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37 _t_lir_schedule,
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38 _t_codeemit,
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39 _t_codeinstall,
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40 max_phase_timers
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41 } TimerName;
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42
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43 static const char * timer_name[] = {
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44 "compile",
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45 "setup",
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46 "optimizeIR",
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47 "buildIR",
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48 "emit_lir",
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49 "linearScan",
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50 "lirGeneration",
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51 "lir_schedule",
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52 "codeemit",
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53 "codeinstall"
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54 };
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55
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56 static elapsedTimer timers[max_phase_timers];
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57 static int totalInstructionNodes = 0;
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58
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59 class PhaseTraceTime: public TraceTime {
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60 private:
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61 JavaThread* _thread;
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62
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63 public:
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64 PhaseTraceTime(TimerName timer):
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65 TraceTime("", &timers[timer], CITime || CITimeEach, Verbose) {
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66 }
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67 };
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68
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69 Arena* Compilation::_arena = NULL;
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70 Compilation* Compilation::_compilation = NULL;
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71
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72 // Implementation of Compilation
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73
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74
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75 #ifndef PRODUCT
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76
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77 void Compilation::maybe_print_current_instruction() {
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78 if (_current_instruction != NULL && _last_instruction_printed != _current_instruction) {
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79 _last_instruction_printed = _current_instruction;
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80 _current_instruction->print_line();
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81 }
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82 }
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83 #endif // PRODUCT
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84
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85
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86 DebugInformationRecorder* Compilation::debug_info_recorder() const {
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87 return _env->debug_info();
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88 }
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89
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90
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91 Dependencies* Compilation::dependency_recorder() const {
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92 return _env->dependencies();
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93 }
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94
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95
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96 void Compilation::initialize() {
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97 // Use an oop recorder bound to the CI environment.
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98 // (The default oop recorder is ignorant of the CI.)
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99 OopRecorder* ooprec = new OopRecorder(_env->arena());
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100 _env->set_oop_recorder(ooprec);
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101 _env->set_debug_info(new DebugInformationRecorder(ooprec));
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102 debug_info_recorder()->set_oopmaps(new OopMapSet());
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103 _env->set_dependencies(new Dependencies(_env));
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104 }
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105
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106
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107 void Compilation::build_hir() {
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108 CHECK_BAILOUT();
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109
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110 // setup ir
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111 _hir = new IR(this, method(), osr_bci());
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112 if (!_hir->is_valid()) {
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113 bailout("invalid parsing");
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114 return;
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115 }
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116
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117 #ifndef PRODUCT
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118 if (PrintCFGToFile) {
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119 CFGPrinter::print_cfg(_hir, "After Generation of HIR", true, false);
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120 }
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121 #endif
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122
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123 #ifndef PRODUCT
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124 if (PrintCFG || PrintCFG0) { tty->print_cr("CFG after parsing"); _hir->print(true); }
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125 if (PrintIR || PrintIR0 ) { tty->print_cr("IR after parsing"); _hir->print(false); }
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126 #endif
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127
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128 _hir->verify();
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129
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130 if (UseC1Optimizations) {
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131 NEEDS_CLEANUP
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132 // optimization
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133 PhaseTraceTime timeit(_t_optimizeIR);
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134
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135 _hir->optimize();
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136 }
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137
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138 _hir->verify();
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139
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140 _hir->split_critical_edges();
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141
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142 #ifndef PRODUCT
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143 if (PrintCFG || PrintCFG1) { tty->print_cr("CFG after optimizations"); _hir->print(true); }
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144 if (PrintIR || PrintIR1 ) { tty->print_cr("IR after optimizations"); _hir->print(false); }
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145 #endif
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146
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147 _hir->verify();
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148
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149 // compute block ordering for code generation
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150 // the control flow must not be changed from here on
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151 _hir->compute_code();
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152
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153 if (UseGlobalValueNumbering) {
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154 ResourceMark rm;
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155 int instructions = Instruction::number_of_instructions();
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156 GlobalValueNumbering gvn(_hir);
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157 assert(instructions == Instruction::number_of_instructions(),
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158 "shouldn't have created an instructions");
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159 }
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160
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161 // compute use counts after global value numbering
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162 _hir->compute_use_counts();
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163
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164 #ifndef PRODUCT
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165 if (PrintCFG || PrintCFG2) { tty->print_cr("CFG before code generation"); _hir->code()->print(true); }
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166 if (PrintIR || PrintIR2 ) { tty->print_cr("IR before code generation"); _hir->code()->print(false, true); }
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167 #endif
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168
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169 _hir->verify();
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170 }
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171
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172
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173 void Compilation::emit_lir() {
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174 CHECK_BAILOUT();
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175
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176 LIRGenerator gen(this, method());
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177 {
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178 PhaseTraceTime timeit(_t_lirGeneration);
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179 hir()->iterate_linear_scan_order(&gen);
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180 }
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181
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182 CHECK_BAILOUT();
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183
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184 {
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185 PhaseTraceTime timeit(_t_linearScan);
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186
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187 LinearScan* allocator = new LinearScan(hir(), &gen, frame_map());
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188 set_allocator(allocator);
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189 // Assign physical registers to LIR operands using a linear scan algorithm.
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190 allocator->do_linear_scan();
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191 CHECK_BAILOUT();
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192
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193 _max_spills = allocator->max_spills();
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194 }
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195
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196 if (BailoutAfterLIR) {
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197 if (PrintLIR && !bailed_out()) {
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198 print_LIR(hir()->code());
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199 }
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200 bailout("Bailing out because of -XX:+BailoutAfterLIR");
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201 }
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202 }
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203
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204
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205 void Compilation::emit_code_epilog(LIR_Assembler* assembler) {
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206 CHECK_BAILOUT();
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207
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208 // generate code or slow cases
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209 assembler->emit_slow_case_stubs();
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210 CHECK_BAILOUT();
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211
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212 // generate exception adapters
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213 assembler->emit_exception_entries(exception_info_list());
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214 CHECK_BAILOUT();
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215
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216 // generate code for exception handler
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217 assembler->emit_exception_handler();
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218 CHECK_BAILOUT();
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219 assembler->emit_deopt_handler();
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220 CHECK_BAILOUT();
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221
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222 // done
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223 masm()->flush();
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224 }
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225
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226
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227 int Compilation::emit_code_body() {
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228 // emit code
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229 Runtime1::setup_code_buffer(code(), allocator()->num_calls());
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230 code()->initialize_oop_recorder(env()->oop_recorder());
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231
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232 _masm = new C1_MacroAssembler(code());
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233 _masm->set_oop_recorder(env()->oop_recorder());
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234
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235 LIR_Assembler lir_asm(this);
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236
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237 lir_asm.emit_code(hir()->code());
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238 CHECK_BAILOUT_(0);
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239
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240 emit_code_epilog(&lir_asm);
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241 CHECK_BAILOUT_(0);
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242
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243 generate_exception_handler_table();
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244
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245 #ifndef PRODUCT
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246 if (PrintExceptionHandlers && Verbose) {
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247 exception_handler_table()->print();
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248 }
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249 #endif /* PRODUCT */
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250
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251 return frame_map()->framesize();
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252 }
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253
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254
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255 int Compilation::compile_java_method() {
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256 assert(!method()->is_native(), "should not reach here");
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257
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258 if (BailoutOnExceptionHandlers) {
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259 if (method()->has_exception_handlers()) {
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260 bailout("linear scan can't handle exception handlers");
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261 }
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262 }
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263
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264 CHECK_BAILOUT_(no_frame_size);
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265
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266 {
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267 PhaseTraceTime timeit(_t_buildIR);
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268 build_hir();
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269 }
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270 if (BailoutAfterHIR) {
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271 BAILOUT_("Bailing out because of -XX:+BailoutAfterHIR", no_frame_size);
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272 }
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273
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274
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275 {
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276 PhaseTraceTime timeit(_t_emit_lir);
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277
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278 _frame_map = new FrameMap(method(), hir()->number_of_locks(), MAX2(4, hir()->max_stack()));
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279 emit_lir();
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280 }
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281 CHECK_BAILOUT_(no_frame_size);
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282
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283 {
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284 PhaseTraceTime timeit(_t_codeemit);
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285 return emit_code_body();
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286 }
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287 }
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288
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289 void Compilation::install_code(int frame_size) {
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290 // frame_size is in 32-bit words so adjust it intptr_t words
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291 assert(frame_size == frame_map()->framesize(), "must match");
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292 assert(in_bytes(frame_map()->framesize_in_bytes()) % sizeof(intptr_t) == 0, "must be at least pointer aligned");
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293 _env->register_method(
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294 method(),
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295 osr_bci(),
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296 &_offsets,
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297 in_bytes(_frame_map->sp_offset_for_orig_pc()),
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298 code(),
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299 in_bytes(frame_map()->framesize_in_bytes()) / sizeof(intptr_t),
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300 debug_info_recorder()->_oopmaps,
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301 exception_handler_table(),
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302 implicit_exception_table(),
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303 compiler(),
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304 _env->comp_level(),
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305 needs_debug_information(),
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306 has_unsafe_access()
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307 );
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308 }
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309
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310
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311 void Compilation::compile_method() {
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312 // setup compilation
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313 initialize();
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314
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315 if (!method()->can_be_compiled()) {
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316 // Prevent race condition 6328518.
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317 // This can happen if the method is obsolete or breakpointed.
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318 bailout("Bailing out because method is not compilable");
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319 return;
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320 }
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321
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322 if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
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323 // We can assert evol_method because method->can_be_compiled is true.
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324 dependency_recorder()->assert_evol_method(method());
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325 }
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326
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327 if (method()->break_at_execute()) {
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328 BREAKPOINT;
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329 }
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330
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331 #ifndef PRODUCT
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332 if (PrintCFGToFile) {
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333 CFGPrinter::print_compilation(this);
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334 }
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335 #endif
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336
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337 // compile method
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338 int frame_size = compile_java_method();
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339
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340 // bailout if method couldn't be compiled
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341 // Note: make sure we mark the method as not compilable!
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342 CHECK_BAILOUT();
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343
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344 if (InstallMethods) {
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345 // install code
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346 PhaseTraceTime timeit(_t_codeinstall);
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347 install_code(frame_size);
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348 }
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349 totalInstructionNodes += Instruction::number_of_instructions();
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350 }
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351
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352
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353 void Compilation::generate_exception_handler_table() {
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354 // Generate an ExceptionHandlerTable from the exception handler
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355 // information accumulated during the compilation.
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356 ExceptionInfoList* info_list = exception_info_list();
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357
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358 if (info_list->length() == 0) {
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359 return;
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360 }
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361
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362 // allocate some arrays for use by the collection code.
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363 const int num_handlers = 5;
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364 GrowableArray<intptr_t>* bcis = new GrowableArray<intptr_t>(num_handlers);
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365 GrowableArray<intptr_t>* scope_depths = new GrowableArray<intptr_t>(num_handlers);
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366 GrowableArray<intptr_t>* pcos = new GrowableArray<intptr_t>(num_handlers);
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367
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368 for (int i = 0; i < info_list->length(); i++) {
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369 ExceptionInfo* info = info_list->at(i);
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370 XHandlers* handlers = info->exception_handlers();
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371
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372 // empty the arrays
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373 bcis->trunc_to(0);
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374 scope_depths->trunc_to(0);
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375 pcos->trunc_to(0);
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376
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377 for (int i = 0; i < handlers->length(); i++) {
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378 XHandler* handler = handlers->handler_at(i);
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379 assert(handler->entry_pco() != -1, "must have been generated");
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380
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381 int e = bcis->find(handler->handler_bci());
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382 if (e >= 0 && scope_depths->at(e) == handler->scope_count()) {
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383 // two different handlers are declared to dispatch to the same
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384 // catch bci. During parsing we created edges for each
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385 // handler but we really only need one. The exception handler
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386 // table will also get unhappy if we try to declare both since
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387 // it's nonsensical. Just skip this handler.
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388 continue;
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389 }
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390
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391 bcis->append(handler->handler_bci());
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392 if (handler->handler_bci() == -1) {
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393 // insert a wildcard handler at scope depth 0 so that the
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394 // exception lookup logic with find it.
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395 scope_depths->append(0);
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396 } else {
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397 scope_depths->append(handler->scope_count());
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398 }
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399 pcos->append(handler->entry_pco());
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400
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401 // stop processing once we hit a catch any
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402 if (handler->is_catch_all()) {
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403 assert(i == handlers->length() - 1, "catch all must be last handler");
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404 }
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405 }
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406 exception_handler_table()->add_subtable(info->pco(), bcis, scope_depths, pcos);
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407 }
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408 }
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409
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410
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411 Compilation::Compilation(AbstractCompiler* compiler, ciEnv* env, ciMethod* method, int osr_bci)
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412 : _compiler(compiler)
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413 , _env(env)
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414 , _method(method)
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415 , _osr_bci(osr_bci)
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416 , _hir(NULL)
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417 , _max_spills(-1)
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418 , _frame_map(NULL)
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419 , _masm(NULL)
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420 , _has_exception_handlers(false)
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421 , _has_fpu_code(true) // pessimistic assumption
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422 , _has_unsafe_access(false)
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423 , _bailout_msg(NULL)
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424 , _exception_info_list(NULL)
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425 , _allocator(NULL)
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426 , _code(Runtime1::get_buffer_blob()->instructions_begin(),
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427 Runtime1::get_buffer_blob()->instructions_size())
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428 , _current_instruction(NULL)
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429 #ifndef PRODUCT
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430 , _last_instruction_printed(NULL)
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431 #endif // PRODUCT
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432 {
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433 PhaseTraceTime timeit(_t_compile);
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434
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435 assert(_arena == NULL, "shouldn't only one instance of Compilation in existence at a time");
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436 _arena = Thread::current()->resource_area();
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437 _compilation = this;
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438 _needs_debug_information = JvmtiExport::can_examine_or_deopt_anywhere() ||
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439 JavaMonitorsInStackTrace || AlwaysEmitDebugInfo || DeoptimizeALot;
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440 _exception_info_list = new ExceptionInfoList();
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441 _implicit_exception_table.set_size(0);
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442 compile_method();
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443 }
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444
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445 Compilation::~Compilation() {
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446 _arena = NULL;
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447 _compilation = NULL;
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448 }
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449
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450
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451 void Compilation::add_exception_handlers_for_pco(int pco, XHandlers* exception_handlers) {
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452 #ifndef PRODUCT
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453 if (PrintExceptionHandlers && Verbose) {
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454 tty->print_cr(" added exception scope for pco %d", pco);
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455 }
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456 #endif
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457 // Note: we do not have program counters for these exception handlers yet
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458 exception_info_list()->push(new ExceptionInfo(pco, exception_handlers));
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459 }
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460
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461
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462 void Compilation::notice_inlined_method(ciMethod* method) {
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463 _env->notice_inlined_method(method);
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464 }
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465
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466
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467 void Compilation::bailout(const char* msg) {
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468 assert(msg != NULL, "bailout message must exist");
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469 if (!bailed_out()) {
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470 // keep first bailout message
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471 if (PrintBailouts) tty->print_cr("compilation bailout: %s", msg);
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472 _bailout_msg = msg;
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473 }
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474 }
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475
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476
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477 void Compilation::print_timers() {
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478 // tty->print_cr(" Native methods : %6.3f s, Average : %2.3f", CompileBroker::_t_native_compilation.seconds(), CompileBroker::_t_native_compilation.seconds() / CompileBroker::_total_native_compile_count);
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479 float total = timers[_t_setup].seconds() + timers[_t_buildIR].seconds() + timers[_t_emit_lir].seconds() + timers[_t_lir_schedule].seconds() + timers[_t_codeemit].seconds() + timers[_t_codeinstall].seconds();
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480
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481
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482 tty->print_cr(" Detailed C1 Timings");
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483 tty->print_cr(" Setup time: %6.3f s (%4.1f%%)", timers[_t_setup].seconds(), (timers[_t_setup].seconds() / total) * 100.0);
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484 tty->print_cr(" Build IR: %6.3f s (%4.1f%%)", timers[_t_buildIR].seconds(), (timers[_t_buildIR].seconds() / total) * 100.0);
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485 tty->print_cr(" Optimize: %6.3f s (%4.1f%%)", timers[_t_optimizeIR].seconds(), (timers[_t_optimizeIR].seconds() / total) * 100.0);
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486 tty->print_cr(" Emit LIR: %6.3f s (%4.1f%%)", timers[_t_emit_lir].seconds(), (timers[_t_emit_lir].seconds() / total) * 100.0);
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487 tty->print_cr(" LIR Gen: %6.3f s (%4.1f%%)", timers[_t_lirGeneration].seconds(), (timers[_t_lirGeneration].seconds() / total) * 100.0);
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488 tty->print_cr(" Linear Scan: %6.3f s (%4.1f%%)", timers[_t_linearScan].seconds(), (timers[_t_linearScan].seconds() / total) * 100.0);
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489 NOT_PRODUCT(LinearScan::print_timers(timers[_t_linearScan].seconds()));
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490 tty->print_cr(" LIR Schedule: %6.3f s (%4.1f%%)", timers[_t_lir_schedule].seconds(), (timers[_t_lir_schedule].seconds() / total) * 100.0);
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491 tty->print_cr(" Code Emission: %6.3f s (%4.1f%%)", timers[_t_codeemit].seconds(), (timers[_t_codeemit].seconds() / total) * 100.0);
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492 tty->print_cr(" Code Installation: %6.3f s (%4.1f%%)", timers[_t_codeinstall].seconds(), (timers[_t_codeinstall].seconds() / total) * 100.0);
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493 tty->print_cr(" Instruction Nodes: %6d nodes", totalInstructionNodes);
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494
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495 NOT_PRODUCT(LinearScan::print_statistics());
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496 }
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497
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498
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499 #ifndef PRODUCT
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500 void Compilation::compile_only_this_method() {
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501 ResourceMark rm;
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502 fileStream stream(fopen("c1_compile_only", "wt"));
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503 stream.print_cr("# c1 compile only directives");
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504 compile_only_this_scope(&stream, hir()->top_scope());
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505 }
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506
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507
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508 void Compilation::compile_only_this_scope(outputStream* st, IRScope* scope) {
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509 st->print("CompileOnly=");
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510 scope->method()->holder()->name()->print_symbol_on(st);
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511 st->print(".");
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512 scope->method()->name()->print_symbol_on(st);
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513 st->cr();
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514 }
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515
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516
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517 void Compilation::exclude_this_method() {
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518 fileStream stream(fopen(".hotspot_compiler", "at"));
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519 stream.print("exclude ");
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520 method()->holder()->name()->print_symbol_on(&stream);
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521 stream.print(" ");
|
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522 method()->name()->print_symbol_on(&stream);
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523 stream.cr();
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524 stream.cr();
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525 }
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526 #endif
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