c1_Compilation.cpp revision 0:a61af66fc99e
1/* 2 * Copyright 1999-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 * 23 */ 24 25#include "incls/_precompiled.incl" 26#include "incls/_c1_Compilation.cpp.incl" 27 28 29typedef enum { 30 _t_compile, 31 _t_setup, 32 _t_optimizeIR, 33 _t_buildIR, 34 _t_emit_lir, 35 _t_linearScan, 36 _t_lirGeneration, 37 _t_lir_schedule, 38 _t_codeemit, 39 _t_codeinstall, 40 max_phase_timers 41} TimerName; 42 43static const char * timer_name[] = { 44 "compile", 45 "setup", 46 "optimizeIR", 47 "buildIR", 48 "emit_lir", 49 "linearScan", 50 "lirGeneration", 51 "lir_schedule", 52 "codeemit", 53 "codeinstall" 54}; 55 56static elapsedTimer timers[max_phase_timers]; 57static int totalInstructionNodes = 0; 58 59class PhaseTraceTime: public TraceTime { 60 private: 61 JavaThread* _thread; 62 63 public: 64 PhaseTraceTime(TimerName timer): 65 TraceTime("", &timers[timer], CITime || CITimeEach, Verbose) { 66 } 67}; 68 69Arena* Compilation::_arena = NULL; 70Compilation* Compilation::_compilation = NULL; 71 72// Implementation of Compilation 73 74 75#ifndef PRODUCT 76 77void Compilation::maybe_print_current_instruction() { 78 if (_current_instruction != NULL && _last_instruction_printed != _current_instruction) { 79 _last_instruction_printed = _current_instruction; 80 _current_instruction->print_line(); 81 } 82} 83#endif // PRODUCT 84 85 86DebugInformationRecorder* Compilation::debug_info_recorder() const { 87 return _env->debug_info(); 88} 89 90 91Dependencies* Compilation::dependency_recorder() const { 92 return _env->dependencies(); 93} 94 95 96void Compilation::initialize() { 97 // Use an oop recorder bound to the CI environment. 98 // (The default oop recorder is ignorant of the CI.) 99 OopRecorder* ooprec = new OopRecorder(_env->arena()); 100 _env->set_oop_recorder(ooprec); 101 _env->set_debug_info(new DebugInformationRecorder(ooprec)); 102 debug_info_recorder()->set_oopmaps(new OopMapSet()); 103 _env->set_dependencies(new Dependencies(_env)); 104} 105 106 107void Compilation::build_hir() { 108 CHECK_BAILOUT(); 109 110 // setup ir 111 _hir = new IR(this, method(), osr_bci()); 112 if (!_hir->is_valid()) { 113 bailout("invalid parsing"); 114 return; 115 } 116 117#ifndef PRODUCT 118 if (PrintCFGToFile) { 119 CFGPrinter::print_cfg(_hir, "After Generation of HIR", true, false); 120 } 121#endif 122 123#ifndef PRODUCT 124 if (PrintCFG || PrintCFG0) { tty->print_cr("CFG after parsing"); _hir->print(true); } 125 if (PrintIR || PrintIR0 ) { tty->print_cr("IR after parsing"); _hir->print(false); } 126#endif 127 128 _hir->verify(); 129 130 if (UseC1Optimizations) { 131 NEEDS_CLEANUP 132 // optimization 133 PhaseTraceTime timeit(_t_optimizeIR); 134 135 _hir->optimize(); 136 } 137 138 _hir->verify(); 139 140 _hir->split_critical_edges(); 141 142#ifndef PRODUCT 143 if (PrintCFG || PrintCFG1) { tty->print_cr("CFG after optimizations"); _hir->print(true); } 144 if (PrintIR || PrintIR1 ) { tty->print_cr("IR after optimizations"); _hir->print(false); } 145#endif 146 147 _hir->verify(); 148 149 // compute block ordering for code generation 150 // the control flow must not be changed from here on 151 _hir->compute_code(); 152 153 if (UseGlobalValueNumbering) { 154 ResourceMark rm; 155 int instructions = Instruction::number_of_instructions(); 156 GlobalValueNumbering gvn(_hir); 157 assert(instructions == Instruction::number_of_instructions(), 158 "shouldn't have created an instructions"); 159 } 160 161 // compute use counts after global value numbering 162 _hir->compute_use_counts(); 163 164#ifndef PRODUCT 165 if (PrintCFG || PrintCFG2) { tty->print_cr("CFG before code generation"); _hir->code()->print(true); } 166 if (PrintIR || PrintIR2 ) { tty->print_cr("IR before code generation"); _hir->code()->print(false, true); } 167#endif 168 169 _hir->verify(); 170} 171 172 173void Compilation::emit_lir() { 174 CHECK_BAILOUT(); 175 176 LIRGenerator gen(this, method()); 177 { 178 PhaseTraceTime timeit(_t_lirGeneration); 179 hir()->iterate_linear_scan_order(&gen); 180 } 181 182 CHECK_BAILOUT(); 183 184 { 185 PhaseTraceTime timeit(_t_linearScan); 186 187 LinearScan* allocator = new LinearScan(hir(), &gen, frame_map()); 188 set_allocator(allocator); 189 // Assign physical registers to LIR operands using a linear scan algorithm. 190 allocator->do_linear_scan(); 191 CHECK_BAILOUT(); 192 193 _max_spills = allocator->max_spills(); 194 } 195 196 if (BailoutAfterLIR) { 197 if (PrintLIR && !bailed_out()) { 198 print_LIR(hir()->code()); 199 } 200 bailout("Bailing out because of -XX:+BailoutAfterLIR"); 201 } 202} 203 204 205void Compilation::emit_code_epilog(LIR_Assembler* assembler) { 206 CHECK_BAILOUT(); 207 208 // generate code or slow cases 209 assembler->emit_slow_case_stubs(); 210 CHECK_BAILOUT(); 211 212 // generate exception adapters 213 assembler->emit_exception_entries(exception_info_list()); 214 CHECK_BAILOUT(); 215 216 // generate code for exception handler 217 assembler->emit_exception_handler(); 218 CHECK_BAILOUT(); 219 assembler->emit_deopt_handler(); 220 CHECK_BAILOUT(); 221 222 // done 223 masm()->flush(); 224} 225 226 227int Compilation::emit_code_body() { 228 // emit code 229 Runtime1::setup_code_buffer(code(), allocator()->num_calls()); 230 code()->initialize_oop_recorder(env()->oop_recorder()); 231 232 _masm = new C1_MacroAssembler(code()); 233 _masm->set_oop_recorder(env()->oop_recorder()); 234 235 LIR_Assembler lir_asm(this); 236 237 lir_asm.emit_code(hir()->code()); 238 CHECK_BAILOUT_(0); 239 240 emit_code_epilog(&lir_asm); 241 CHECK_BAILOUT_(0); 242 243 generate_exception_handler_table(); 244 245#ifndef PRODUCT 246 if (PrintExceptionHandlers && Verbose) { 247 exception_handler_table()->print(); 248 } 249#endif /* PRODUCT */ 250 251 return frame_map()->framesize(); 252} 253 254 255int Compilation::compile_java_method() { 256 assert(!method()->is_native(), "should not reach here"); 257 258 if (BailoutOnExceptionHandlers) { 259 if (method()->has_exception_handlers()) { 260 bailout("linear scan can't handle exception handlers"); 261 } 262 } 263 264 CHECK_BAILOUT_(no_frame_size); 265 266 { 267 PhaseTraceTime timeit(_t_buildIR); 268 build_hir(); 269 } 270 if (BailoutAfterHIR) { 271 BAILOUT_("Bailing out because of -XX:+BailoutAfterHIR", no_frame_size); 272 } 273 274 275 { 276 PhaseTraceTime timeit(_t_emit_lir); 277 278 _frame_map = new FrameMap(method(), hir()->number_of_locks(), MAX2(4, hir()->max_stack())); 279 emit_lir(); 280 } 281 CHECK_BAILOUT_(no_frame_size); 282 283 { 284 PhaseTraceTime timeit(_t_codeemit); 285 return emit_code_body(); 286 } 287} 288 289void Compilation::install_code(int frame_size) { 290 // frame_size is in 32-bit words so adjust it intptr_t words 291 assert(frame_size == frame_map()->framesize(), "must match"); 292 assert(in_bytes(frame_map()->framesize_in_bytes()) % sizeof(intptr_t) == 0, "must be at least pointer aligned"); 293 _env->register_method( 294 method(), 295 osr_bci(), 296 &_offsets, 297 in_bytes(_frame_map->sp_offset_for_orig_pc()), 298 code(), 299 in_bytes(frame_map()->framesize_in_bytes()) / sizeof(intptr_t), 300 debug_info_recorder()->_oopmaps, 301 exception_handler_table(), 302 implicit_exception_table(), 303 compiler(), 304 _env->comp_level(), 305 needs_debug_information(), 306 has_unsafe_access() 307 ); 308} 309 310 311void Compilation::compile_method() { 312 // setup compilation 313 initialize(); 314 315 if (!method()->can_be_compiled()) { 316 // Prevent race condition 6328518. 317 // This can happen if the method is obsolete or breakpointed. 318 bailout("Bailing out because method is not compilable"); 319 return; 320 } 321 322 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { 323 // We can assert evol_method because method->can_be_compiled is true. 324 dependency_recorder()->assert_evol_method(method()); 325 } 326 327 if (method()->break_at_execute()) { 328 BREAKPOINT; 329 } 330 331#ifndef PRODUCT 332 if (PrintCFGToFile) { 333 CFGPrinter::print_compilation(this); 334 } 335#endif 336 337 // compile method 338 int frame_size = compile_java_method(); 339 340 // bailout if method couldn't be compiled 341 // Note: make sure we mark the method as not compilable! 342 CHECK_BAILOUT(); 343 344 if (InstallMethods) { 345 // install code 346 PhaseTraceTime timeit(_t_codeinstall); 347 install_code(frame_size); 348 } 349 totalInstructionNodes += Instruction::number_of_instructions(); 350} 351 352 353void Compilation::generate_exception_handler_table() { 354 // Generate an ExceptionHandlerTable from the exception handler 355 // information accumulated during the compilation. 356 ExceptionInfoList* info_list = exception_info_list(); 357 358 if (info_list->length() == 0) { 359 return; 360 } 361 362 // allocate some arrays for use by the collection code. 363 const int num_handlers = 5; 364 GrowableArray<intptr_t>* bcis = new GrowableArray<intptr_t>(num_handlers); 365 GrowableArray<intptr_t>* scope_depths = new GrowableArray<intptr_t>(num_handlers); 366 GrowableArray<intptr_t>* pcos = new GrowableArray<intptr_t>(num_handlers); 367 368 for (int i = 0; i < info_list->length(); i++) { 369 ExceptionInfo* info = info_list->at(i); 370 XHandlers* handlers = info->exception_handlers(); 371 372 // empty the arrays 373 bcis->trunc_to(0); 374 scope_depths->trunc_to(0); 375 pcos->trunc_to(0); 376 377 for (int i = 0; i < handlers->length(); i++) { 378 XHandler* handler = handlers->handler_at(i); 379 assert(handler->entry_pco() != -1, "must have been generated"); 380 381 int e = bcis->find(handler->handler_bci()); 382 if (e >= 0 && scope_depths->at(e) == handler->scope_count()) { 383 // two different handlers are declared to dispatch to the same 384 // catch bci. During parsing we created edges for each 385 // handler but we really only need one. The exception handler 386 // table will also get unhappy if we try to declare both since 387 // it's nonsensical. Just skip this handler. 388 continue; 389 } 390 391 bcis->append(handler->handler_bci()); 392 if (handler->handler_bci() == -1) { 393 // insert a wildcard handler at scope depth 0 so that the 394 // exception lookup logic with find it. 395 scope_depths->append(0); 396 } else { 397 scope_depths->append(handler->scope_count()); 398 } 399 pcos->append(handler->entry_pco()); 400 401 // stop processing once we hit a catch any 402 if (handler->is_catch_all()) { 403 assert(i == handlers->length() - 1, "catch all must be last handler"); 404 } 405 } 406 exception_handler_table()->add_subtable(info->pco(), bcis, scope_depths, pcos); 407 } 408} 409 410 411Compilation::Compilation(AbstractCompiler* compiler, ciEnv* env, ciMethod* method, int osr_bci) 412: _compiler(compiler) 413, _env(env) 414, _method(method) 415, _osr_bci(osr_bci) 416, _hir(NULL) 417, _max_spills(-1) 418, _frame_map(NULL) 419, _masm(NULL) 420, _has_exception_handlers(false) 421, _has_fpu_code(true) // pessimistic assumption 422, _has_unsafe_access(false) 423, _bailout_msg(NULL) 424, _exception_info_list(NULL) 425, _allocator(NULL) 426, _code(Runtime1::get_buffer_blob()->instructions_begin(), 427 Runtime1::get_buffer_blob()->instructions_size()) 428, _current_instruction(NULL) 429#ifndef PRODUCT 430, _last_instruction_printed(NULL) 431#endif // PRODUCT 432{ 433 PhaseTraceTime timeit(_t_compile); 434 435 assert(_arena == NULL, "shouldn't only one instance of Compilation in existence at a time"); 436 _arena = Thread::current()->resource_area(); 437 _compilation = this; 438 _needs_debug_information = JvmtiExport::can_examine_or_deopt_anywhere() || 439 JavaMonitorsInStackTrace || AlwaysEmitDebugInfo || DeoptimizeALot; 440 _exception_info_list = new ExceptionInfoList(); 441 _implicit_exception_table.set_size(0); 442 compile_method(); 443} 444 445Compilation::~Compilation() { 446 _arena = NULL; 447 _compilation = NULL; 448} 449 450 451void Compilation::add_exception_handlers_for_pco(int pco, XHandlers* exception_handlers) { 452#ifndef PRODUCT 453 if (PrintExceptionHandlers && Verbose) { 454 tty->print_cr(" added exception scope for pco %d", pco); 455 } 456#endif 457 // Note: we do not have program counters for these exception handlers yet 458 exception_info_list()->push(new ExceptionInfo(pco, exception_handlers)); 459} 460 461 462void Compilation::notice_inlined_method(ciMethod* method) { 463 _env->notice_inlined_method(method); 464} 465 466 467void Compilation::bailout(const char* msg) { 468 assert(msg != NULL, "bailout message must exist"); 469 if (!bailed_out()) { 470 // keep first bailout message 471 if (PrintBailouts) tty->print_cr("compilation bailout: %s", msg); 472 _bailout_msg = msg; 473 } 474} 475 476 477void Compilation::print_timers() { 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); 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(); 480 481 482 tty->print_cr(" Detailed C1 Timings"); 483 tty->print_cr(" Setup time: %6.3f s (%4.1f%%)", timers[_t_setup].seconds(), (timers[_t_setup].seconds() / total) * 100.0); 484 tty->print_cr(" Build IR: %6.3f s (%4.1f%%)", timers[_t_buildIR].seconds(), (timers[_t_buildIR].seconds() / total) * 100.0); 485 tty->print_cr(" Optimize: %6.3f s (%4.1f%%)", timers[_t_optimizeIR].seconds(), (timers[_t_optimizeIR].seconds() / total) * 100.0); 486 tty->print_cr(" Emit LIR: %6.3f s (%4.1f%%)", timers[_t_emit_lir].seconds(), (timers[_t_emit_lir].seconds() / total) * 100.0); 487 tty->print_cr(" LIR Gen: %6.3f s (%4.1f%%)", timers[_t_lirGeneration].seconds(), (timers[_t_lirGeneration].seconds() / total) * 100.0); 488 tty->print_cr(" Linear Scan: %6.3f s (%4.1f%%)", timers[_t_linearScan].seconds(), (timers[_t_linearScan].seconds() / total) * 100.0); 489 NOT_PRODUCT(LinearScan::print_timers(timers[_t_linearScan].seconds())); 490 tty->print_cr(" LIR Schedule: %6.3f s (%4.1f%%)", timers[_t_lir_schedule].seconds(), (timers[_t_lir_schedule].seconds() / total) * 100.0); 491 tty->print_cr(" Code Emission: %6.3f s (%4.1f%%)", timers[_t_codeemit].seconds(), (timers[_t_codeemit].seconds() / total) * 100.0); 492 tty->print_cr(" Code Installation: %6.3f s (%4.1f%%)", timers[_t_codeinstall].seconds(), (timers[_t_codeinstall].seconds() / total) * 100.0); 493 tty->print_cr(" Instruction Nodes: %6d nodes", totalInstructionNodes); 494 495 NOT_PRODUCT(LinearScan::print_statistics()); 496} 497 498 499#ifndef PRODUCT 500void Compilation::compile_only_this_method() { 501 ResourceMark rm; 502 fileStream stream(fopen("c1_compile_only", "wt")); 503 stream.print_cr("# c1 compile only directives"); 504 compile_only_this_scope(&stream, hir()->top_scope()); 505} 506 507 508void Compilation::compile_only_this_scope(outputStream* st, IRScope* scope) { 509 st->print("CompileOnly="); 510 scope->method()->holder()->name()->print_symbol_on(st); 511 st->print("."); 512 scope->method()->name()->print_symbol_on(st); 513 st->cr(); 514} 515 516 517void Compilation::exclude_this_method() { 518 fileStream stream(fopen(".hotspot_compiler", "at")); 519 stream.print("exclude "); 520 method()->holder()->name()->print_symbol_on(&stream); 521 stream.print(" "); 522 method()->name()->print_symbol_on(&stream); 523 stream.cr(); 524 stream.cr(); 525} 526#endif 527