1 /*
   2  * Copyright (c) 1999, 2016, 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 "precompiled.hpp"
  26 #include "c1/c1_CFGPrinter.hpp"
  27 #include "c1/c1_Compilation.hpp"
  28 #include "c1/c1_IR.hpp"
  29 #include "c1/c1_LIRAssembler.hpp"
  30 #include "c1/c1_LinearScan.hpp"
  31 #include "c1/c1_MacroAssembler.hpp"
  32 #include "c1/c1_RangeCheckElimination.hpp"
  33 #include "c1/c1_ValueMap.hpp"
  34 #include "c1/c1_ValueStack.hpp"
  35 #include "code/debugInfoRec.hpp"
  36 #include "compiler/compileLog.hpp"
  37 #include "compiler/compilerDirectives.hpp"
  38 #include "memory/resourceArea.hpp"
  39 #include "runtime/sharedRuntime.hpp"
  40 #include "runtime/timerTrace.hpp"
  41 
  42 typedef enum {
  43   _t_compile,
  44     _t_setup,
  45     _t_buildIR,
  46       _t_hir_parse,
  47       _t_gvn,
  48       _t_optimize_blocks,
  49       _t_optimize_null_checks,
  50       _t_rangeCheckElimination,
  51     _t_emit_lir,
  52       _t_linearScan,
  53       _t_lirGeneration,
  54     _t_codeemit,
  55     _t_codeinstall,
  56   max_phase_timers
  57 } TimerName;
  58 
  59 static const char * timer_name[] = {
  60   "compile",
  61   "setup",
  62   "buildIR",
  63   "parse_hir",
  64   "gvn",
  65   "optimize_blocks",
  66   "optimize_null_checks",
  67   "rangeCheckElimination",
  68   "emit_lir",
  69   "linearScan",
  70   "lirGeneration",
  71   "codeemit",
  72   "codeinstall"
  73 };
  74 
  75 static elapsedTimer timers[max_phase_timers];
  76 static int totalInstructionNodes = 0;
  77 
  78 class PhaseTraceTime: public TraceTime {
  79  private:
  80   JavaThread* _thread;
  81   CompileLog* _log;
  82   TimerName _timer;
  83 
  84  public:
  85   PhaseTraceTime(TimerName timer)
  86   : TraceTime("", &timers[timer], CITime || CITimeEach, Verbose),
  87     _log(NULL), _timer(timer)
  88   {
  89     if (Compilation::current() != NULL) {
  90       _log = Compilation::current()->log();
  91     }
  92 
  93     if (_log != NULL) {
  94       _log->begin_head("phase name='%s'", timer_name[_timer]);
  95       _log->stamp();
  96       _log->end_head();
  97     }
  98   }
  99 
 100   ~PhaseTraceTime() {
 101     if (_log != NULL)
 102       _log->done("phase name='%s'", timer_name[_timer]);
 103   }
 104 };
 105 
 106 // Implementation of Compilation
 107 
 108 
 109 #ifndef PRODUCT
 110 
 111 void Compilation::maybe_print_current_instruction() {
 112   if (_current_instruction != NULL && _last_instruction_printed != _current_instruction) {
 113     _last_instruction_printed = _current_instruction;
 114     _current_instruction->print_line();
 115   }
 116 }
 117 #endif // PRODUCT
 118 
 119 
 120 DebugInformationRecorder* Compilation::debug_info_recorder() const {
 121   return _env->debug_info();
 122 }
 123 
 124 
 125 Dependencies* Compilation::dependency_recorder() const {
 126   return _env->dependencies();
 127 }
 128 
 129 
 130 void Compilation::initialize() {
 131   // Use an oop recorder bound to the CI environment.
 132   // (The default oop recorder is ignorant of the CI.)
 133   OopRecorder* ooprec = new OopRecorder(_env->arena());
 134   _env->set_oop_recorder(ooprec);
 135   _env->set_debug_info(new DebugInformationRecorder(ooprec));
 136   debug_info_recorder()->set_oopmaps(new OopMapSet());
 137   _env->set_dependencies(new Dependencies(_env));
 138 }
 139 
 140 
 141 void Compilation::build_hir() {
 142   CHECK_BAILOUT();
 143 
 144   // setup ir
 145   CompileLog* log = this->log();
 146   if (log != NULL) {
 147     log->begin_head("parse method='%d' ",
 148                     log->identify(_method));
 149     log->stamp();
 150     log->end_head();
 151   }
 152   {
 153     PhaseTraceTime timeit(_t_hir_parse);
 154     _hir = new IR(this, method(), osr_bci());
 155   }
 156   if (log)  log->done("parse");
 157   if (!_hir->is_valid()) {
 158     bailout("invalid parsing");
 159     return;
 160   }
 161 
 162 #ifndef PRODUCT
 163   if (PrintCFGToFile) {
 164     CFGPrinter::print_cfg(_hir, "After Generation of HIR", true, false);
 165   }
 166 #endif
 167 
 168 #ifndef PRODUCT
 169   if (PrintCFG || PrintCFG0) { tty->print_cr("CFG after parsing"); _hir->print(true); }
 170   if (PrintIR  || PrintIR0 ) { tty->print_cr("IR after parsing"); _hir->print(false); }
 171 #endif
 172 
 173   _hir->verify();
 174 
 175   if (UseC1Optimizations) {
 176     NEEDS_CLEANUP
 177     // optimization
 178     PhaseTraceTime timeit(_t_optimize_blocks);
 179 
 180     _hir->optimize_blocks();
 181   }
 182 
 183   _hir->verify();
 184 
 185   _hir->split_critical_edges();
 186 
 187 #ifndef PRODUCT
 188   if (PrintCFG || PrintCFG1) { tty->print_cr("CFG after optimizations"); _hir->print(true); }
 189   if (PrintIR  || PrintIR1 ) { tty->print_cr("IR after optimizations"); _hir->print(false); }
 190 #endif
 191 
 192   _hir->verify();
 193 
 194   // compute block ordering for code generation
 195   // the control flow must not be changed from here on
 196   _hir->compute_code();
 197 
 198   if (UseGlobalValueNumbering) {
 199     // No resource mark here! LoopInvariantCodeMotion can allocate ValueStack objects.
 200     PhaseTraceTime timeit(_t_gvn);
 201     int instructions = Instruction::number_of_instructions();
 202     GlobalValueNumbering gvn(_hir);
 203     assert(instructions == Instruction::number_of_instructions(),
 204            "shouldn't have created an instructions");
 205   }
 206 
 207   _hir->verify();
 208 
 209 #ifndef PRODUCT
 210   if (PrintCFGToFile) {
 211     CFGPrinter::print_cfg(_hir, "Before RangeCheckElimination", true, false);
 212   }
 213 #endif
 214 
 215   if (RangeCheckElimination) {
 216     if (_hir->osr_entry() == NULL) {
 217       PhaseTraceTime timeit(_t_rangeCheckElimination);
 218       RangeCheckElimination::eliminate(_hir);
 219     }
 220   }
 221 
 222 #ifndef PRODUCT
 223   if (PrintCFGToFile) {
 224     CFGPrinter::print_cfg(_hir, "After RangeCheckElimination", true, false);
 225   }
 226 #endif
 227 
 228   if (UseC1Optimizations) {
 229     // loop invariant code motion reorders instructions and range
 230     // check elimination adds new instructions so do null check
 231     // elimination after.
 232     NEEDS_CLEANUP
 233     // optimization
 234     PhaseTraceTime timeit(_t_optimize_null_checks);
 235 
 236     _hir->eliminate_null_checks();
 237   }
 238 
 239   _hir->verify();
 240 
 241   // compute use counts after global value numbering
 242   _hir->compute_use_counts();
 243 
 244 #ifndef PRODUCT
 245   if (PrintCFG || PrintCFG2) { tty->print_cr("CFG before code generation"); _hir->code()->print(true); }
 246   if (PrintIR  || PrintIR2 ) { tty->print_cr("IR before code generation"); _hir->code()->print(false, true); }
 247 #endif
 248 
 249   _hir->verify();
 250 }
 251 
 252 
 253 void Compilation::emit_lir() {
 254   CHECK_BAILOUT();
 255 
 256   LIRGenerator gen(this, method());
 257   {
 258     PhaseTraceTime timeit(_t_lirGeneration);
 259     hir()->iterate_linear_scan_order(&gen);
 260   }
 261 
 262   CHECK_BAILOUT();
 263 
 264   {
 265     PhaseTraceTime timeit(_t_linearScan);
 266 
 267     LinearScan* allocator = new LinearScan(hir(), &gen, frame_map());
 268     set_allocator(allocator);
 269     // Assign physical registers to LIR operands using a linear scan algorithm.
 270     allocator->do_linear_scan();
 271     CHECK_BAILOUT();
 272 
 273     _max_spills = allocator->max_spills();
 274   }
 275 
 276   if (BailoutAfterLIR) {
 277     if (PrintLIR && !bailed_out()) {
 278       print_LIR(hir()->code());
 279     }
 280     bailout("Bailing out because of -XX:+BailoutAfterLIR");
 281   }
 282 }
 283 
 284 
 285 void Compilation::emit_code_epilog(LIR_Assembler* assembler) {
 286   CHECK_BAILOUT();
 287 
 288   CodeOffsets* code_offsets = assembler->offsets();
 289 
 290   // generate code or slow cases
 291   assembler->emit_slow_case_stubs();
 292   CHECK_BAILOUT();
 293 
 294   // generate exception adapters
 295   assembler->emit_exception_entries(exception_info_list());
 296   CHECK_BAILOUT();
 297 
 298   // Generate code for exception handler.
 299   code_offsets->set_value(CodeOffsets::Exceptions, assembler->emit_exception_handler());
 300   CHECK_BAILOUT();
 301 
 302   // Generate code for deopt handler.
 303   code_offsets->set_value(CodeOffsets::Deopt, assembler->emit_deopt_handler());
 304   CHECK_BAILOUT();
 305 
 306   // Emit the MethodHandle deopt handler code (if required).
 307   if (has_method_handle_invokes()) {
 308     // We can use the same code as for the normal deopt handler, we
 309     // just need a different entry point address.
 310     code_offsets->set_value(CodeOffsets::DeoptMH, assembler->emit_deopt_handler());
 311     CHECK_BAILOUT();
 312   }
 313 
 314   // Emit the handler to remove the activation from the stack and
 315   // dispatch to the caller.
 316   offsets()->set_value(CodeOffsets::UnwindHandler, assembler->emit_unwind_handler());
 317 
 318   // done
 319   masm()->flush();
 320 }
 321 
 322 
 323 bool Compilation::setup_code_buffer(CodeBuffer* code, int call_stub_estimate) {
 324   // Preinitialize the consts section to some large size:
 325   int locs_buffer_size = 20 * (relocInfo::length_limit + sizeof(relocInfo));
 326   char* locs_buffer = NEW_RESOURCE_ARRAY(char, locs_buffer_size);
 327   code->insts()->initialize_shared_locs((relocInfo*)locs_buffer,
 328                                         locs_buffer_size / sizeof(relocInfo));
 329   code->initialize_consts_size(Compilation::desired_max_constant_size());
 330   // Call stubs + two deopt handlers (regular and MH) + exception handler
 331   int stub_size = (call_stub_estimate * LIR_Assembler::call_stub_size()) +
 332                    LIR_Assembler::exception_handler_size() +
 333                    (2 * LIR_Assembler::deopt_handler_size());
 334   if (stub_size >= code->insts_capacity()) return false;
 335   code->initialize_stubs_size(stub_size);
 336   return true;
 337 }
 338 
 339 
 340 int Compilation::emit_code_body() {
 341   // emit code
 342   if (!setup_code_buffer(code(), allocator()->num_calls())) {
 343     BAILOUT_("size requested greater than avail code buffer size", 0);
 344   }
 345   code()->initialize_oop_recorder(env()->oop_recorder());
 346 
 347   _masm = new C1_MacroAssembler(code());
 348   _masm->set_oop_recorder(env()->oop_recorder());
 349 
 350   LIR_Assembler lir_asm(this);
 351 
 352   lir_asm.emit_code(hir()->code());
 353   CHECK_BAILOUT_(0);
 354 
 355   emit_code_epilog(&lir_asm);
 356   CHECK_BAILOUT_(0);
 357 
 358   generate_exception_handler_table();
 359 
 360 #ifndef PRODUCT
 361   if (PrintExceptionHandlers && Verbose) {
 362     exception_handler_table()->print();
 363   }
 364 #endif /* PRODUCT */
 365 
 366   return frame_map()->framesize();
 367 }
 368 
 369 
 370 int Compilation::compile_java_method() {
 371   assert(!method()->is_native(), "should not reach here");
 372 
 373   if (BailoutOnExceptionHandlers) {
 374     if (method()->has_exception_handlers()) {
 375       bailout("linear scan can't handle exception handlers");
 376     }
 377   }
 378 
 379   CHECK_BAILOUT_(no_frame_size);
 380 
 381   if (is_profiling() && !method()->ensure_method_data()) {
 382     BAILOUT_("mdo allocation failed", no_frame_size);
 383   }
 384 
 385   {
 386     PhaseTraceTime timeit(_t_buildIR);
 387     build_hir();
 388   }
 389   if (BailoutAfterHIR) {
 390     BAILOUT_("Bailing out because of -XX:+BailoutAfterHIR", no_frame_size);
 391   }
 392 
 393 
 394   {
 395     PhaseTraceTime timeit(_t_emit_lir);
 396 
 397     _frame_map = new FrameMap(method(), hir()->number_of_locks(), MAX2(4, hir()->max_stack()));
 398     emit_lir();
 399   }
 400   CHECK_BAILOUT_(no_frame_size);
 401 
 402   {
 403     PhaseTraceTime timeit(_t_codeemit);
 404     return emit_code_body();
 405   }
 406 }
 407 
 408 void Compilation::install_code(int frame_size) {
 409   // frame_size is in 32-bit words so adjust it intptr_t words
 410   assert(frame_size == frame_map()->framesize(), "must match");
 411   assert(in_bytes(frame_map()->framesize_in_bytes()) % sizeof(intptr_t) == 0, "must be at least pointer aligned");
 412   _env->register_method(
 413     method(),
 414     osr_bci(),
 415     &_offsets,
 416     in_bytes(_frame_map->sp_offset_for_orig_pc()),
 417     code(),
 418     in_bytes(frame_map()->framesize_in_bytes()) / sizeof(intptr_t),
 419     debug_info_recorder()->_oopmaps,
 420     exception_handler_table(),
 421     implicit_exception_table(),
 422     compiler(),
 423     has_unsafe_access(),
 424     SharedRuntime::is_wide_vector(max_vector_size())
 425   );
 426 }
 427 
 428 
 429 void Compilation::compile_method() {
 430   {
 431     PhaseTraceTime timeit(_t_setup);
 432 
 433     // setup compilation
 434     initialize();
 435   }
 436 
 437   if (!method()->can_be_compiled()) {
 438     // Prevent race condition 6328518.
 439     // This can happen if the method is obsolete or breakpointed.
 440     bailout("Bailing out because method is not compilable");
 441     return;
 442   }
 443 
 444   if (_env->jvmti_can_hotswap_or_post_breakpoint()) {
 445     // We can assert evol_method because method->can_be_compiled is true.
 446     dependency_recorder()->assert_evol_method(method());
 447   }
 448 
 449   if (directive()->BreakAtCompileOption) {
 450     BREAKPOINT;
 451   }
 452 
 453 #ifndef PRODUCT
 454   if (PrintCFGToFile) {
 455     CFGPrinter::print_compilation(this);
 456   }
 457 #endif
 458 
 459   // compile method
 460   int frame_size = compile_java_method();
 461 
 462   // bailout if method couldn't be compiled
 463   // Note: make sure we mark the method as not compilable!
 464   CHECK_BAILOUT();
 465 
 466   if (InstallMethods) {
 467     // install code
 468     PhaseTraceTime timeit(_t_codeinstall);
 469     install_code(frame_size);
 470   }
 471 
 472   if (log() != NULL) // Print code cache state into compiler log
 473     log()->code_cache_state();
 474 
 475   totalInstructionNodes += Instruction::number_of_instructions();
 476 }
 477 
 478 
 479 void Compilation::generate_exception_handler_table() {
 480   // Generate an ExceptionHandlerTable from the exception handler
 481   // information accumulated during the compilation.
 482   ExceptionInfoList* info_list = exception_info_list();
 483 
 484   if (info_list->length() == 0) {
 485     return;
 486   }
 487 
 488   // allocate some arrays for use by the collection code.
 489   const int num_handlers = 5;
 490   GrowableArray<intptr_t>* bcis = new GrowableArray<intptr_t>(num_handlers);
 491   GrowableArray<intptr_t>* scope_depths = new GrowableArray<intptr_t>(num_handlers);
 492   GrowableArray<intptr_t>* pcos = new GrowableArray<intptr_t>(num_handlers);
 493 
 494   for (int i = 0; i < info_list->length(); i++) {
 495     ExceptionInfo* info = info_list->at(i);
 496     XHandlers* handlers = info->exception_handlers();
 497 
 498     // empty the arrays
 499     bcis->trunc_to(0);
 500     scope_depths->trunc_to(0);
 501     pcos->trunc_to(0);
 502 
 503     int prev_scope = 0;
 504     for (int i = 0; i < handlers->length(); i++) {
 505       XHandler* handler = handlers->handler_at(i);
 506       assert(handler->entry_pco() != -1, "must have been generated");
 507       assert(handler->scope_count() >= prev_scope, "handlers should be sorted by scope");
 508 
 509       if (handler->scope_count() == prev_scope) {
 510         int e = bcis->find_from_end(handler->handler_bci());
 511         if (e >= 0 && scope_depths->at(e) == handler->scope_count()) {
 512           // two different handlers are declared to dispatch to the same
 513           // catch bci.  During parsing we created edges for each
 514           // handler but we really only need one.  The exception handler
 515           // table will also get unhappy if we try to declare both since
 516           // it's nonsensical.  Just skip this handler.
 517           continue;
 518         }
 519       }
 520 
 521       bcis->append(handler->handler_bci());
 522       if (handler->handler_bci() == -1) {
 523         // insert a wildcard handler at scope depth 0 so that the
 524         // exception lookup logic with find it.
 525         scope_depths->append(0);
 526       } else {
 527         scope_depths->append(handler->scope_count());
 528       }
 529       pcos->append(handler->entry_pco());
 530 
 531       // stop processing once we hit a catch any
 532       if (handler->is_catch_all()) {
 533         assert(i == handlers->length() - 1, "catch all must be last handler");
 534       }
 535       prev_scope = handler->scope_count();
 536     }
 537     exception_handler_table()->add_subtable(info->pco(), bcis, scope_depths, pcos);
 538   }
 539 }
 540 
 541 Compilation::Compilation(AbstractCompiler* compiler, ciEnv* env, ciMethod* method,
 542                          int osr_bci, BufferBlob* buffer_blob, DirectiveSet* directive)
 543 : _next_id(0)
 544 , _next_block_id(0)
 545 , _compiler(compiler)
 546 , _directive(directive)
 547 , _env(env)
 548 , _log(env->log())
 549 , _method(method)
 550 , _osr_bci(osr_bci)
 551 , _hir(NULL)
 552 , _max_spills(-1)
 553 , _frame_map(NULL)
 554 , _masm(NULL)
 555 , _has_exception_handlers(false)
 556 , _has_fpu_code(true)   // pessimistic assumption
 557 , _has_unsafe_access(false)
 558 , _would_profile(false)
 559 , _has_method_handle_invokes(false)
 560 , _has_reserved_stack_access(method->has_reserved_stack_access())
 561 , _bailout_msg(NULL)
 562 , _exception_info_list(NULL)
 563 , _allocator(NULL)
 564 , _code(buffer_blob)
 565 , _has_access_indexed(false)
 566 , _interpreter_frame_size(0)
 567 , _current_instruction(NULL)
 568 #ifndef PRODUCT
 569 , _last_instruction_printed(NULL)
 570 , _cfg_printer_output(NULL)
 571 #endif // PRODUCT
 572 {
 573   PhaseTraceTime timeit(_t_compile);
 574   _arena = Thread::current()->resource_area();
 575   _env->set_compiler_data(this);
 576   _exception_info_list = new ExceptionInfoList();
 577   _implicit_exception_table.set_size(0);
 578 #ifndef PRODUCT
 579   if (PrintCFGToFile) {
 580     _cfg_printer_output = new CFGPrinterOutput(this);
 581   }
 582 #endif
 583   compile_method();
 584   if (bailed_out()) {
 585     _env->record_method_not_compilable(bailout_msg(), !TieredCompilation);
 586     if (is_profiling()) {
 587       // Compilation failed, create MDO, which would signal the interpreter
 588       // to start profiling on its own.
 589       _method->ensure_method_data();
 590     }
 591   } else if (is_profiling()) {
 592     ciMethodData *md = method->method_data_or_null();
 593     if (md != NULL) {
 594       md->set_would_profile(_would_profile);
 595     }
 596   }
 597 }
 598 
 599 Compilation::~Compilation() {
 600   _env->set_compiler_data(NULL);
 601 }
 602 
 603 void Compilation::add_exception_handlers_for_pco(int pco, XHandlers* exception_handlers) {
 604 #ifndef PRODUCT
 605   if (PrintExceptionHandlers && Verbose) {
 606     tty->print_cr("  added exception scope for pco %d", pco);
 607   }
 608 #endif
 609   // Note: we do not have program counters for these exception handlers yet
 610   exception_info_list()->push(new ExceptionInfo(pco, exception_handlers));
 611 }
 612 
 613 
 614 void Compilation::notice_inlined_method(ciMethod* method) {
 615   _env->notice_inlined_method(method);
 616 }
 617 
 618 
 619 void Compilation::bailout(const char* msg) {
 620   assert(msg != NULL, "bailout message must exist");
 621   if (!bailed_out()) {
 622     // keep first bailout message
 623     if (PrintCompilation || PrintBailouts) tty->print_cr("compilation bailout: %s", msg);
 624     _bailout_msg = msg;
 625   }
 626 }
 627 
 628 ciKlass* Compilation::cha_exact_type(ciType* type) {
 629   if (type != NULL && type->is_loaded() && type->is_instance_klass()) {
 630     ciInstanceKlass* ik = type->as_instance_klass();
 631     assert(ik->exact_klass() == NULL, "no cha for final klass");
 632     if (DeoptC1 && UseCHA && !(ik->has_subklass() || ik->is_interface())) {
 633       dependency_recorder()->assert_leaf_type(ik);
 634       return ik;
 635     }
 636   }
 637   return NULL;
 638 }
 639 
 640 void Compilation::print_timers() {
 641   tty->print_cr("    C1 Compile Time:      %7.3f s",      timers[_t_compile].seconds());
 642   tty->print_cr("       Setup time:          %7.3f s",    timers[_t_setup].seconds());
 643 
 644   {
 645     tty->print_cr("       Build HIR:           %7.3f s",    timers[_t_buildIR].seconds());
 646     tty->print_cr("         Parse:               %7.3f s", timers[_t_hir_parse].seconds());
 647     tty->print_cr("         Optimize blocks:     %7.3f s", timers[_t_optimize_blocks].seconds());
 648     tty->print_cr("         GVN:                 %7.3f s", timers[_t_gvn].seconds());
 649     tty->print_cr("         Null checks elim:    %7.3f s", timers[_t_optimize_null_checks].seconds());
 650     tty->print_cr("         Range checks elim:   %7.3f s", timers[_t_rangeCheckElimination].seconds());
 651 
 652     double other = timers[_t_buildIR].seconds() -
 653       (timers[_t_hir_parse].seconds() +
 654        timers[_t_optimize_blocks].seconds() +
 655        timers[_t_gvn].seconds() +
 656        timers[_t_optimize_null_checks].seconds() +
 657        timers[_t_rangeCheckElimination].seconds());
 658     if (other > 0) {
 659       tty->print_cr("         Other:               %7.3f s", other);
 660     }
 661   }
 662 
 663   {
 664     tty->print_cr("       Emit LIR:            %7.3f s",    timers[_t_emit_lir].seconds());
 665     tty->print_cr("         LIR Gen:             %7.3f s",   timers[_t_lirGeneration].seconds());
 666     tty->print_cr("         Linear Scan:         %7.3f s",   timers[_t_linearScan].seconds());
 667     NOT_PRODUCT(LinearScan::print_timers(timers[_t_linearScan].seconds()));
 668 
 669     double other = timers[_t_emit_lir].seconds() -
 670       (timers[_t_lirGeneration].seconds() +
 671        timers[_t_linearScan].seconds());
 672     if (other > 0) {
 673       tty->print_cr("         Other:               %7.3f s", other);
 674     }
 675   }
 676 
 677   tty->print_cr("       Code Emission:       %7.3f s",    timers[_t_codeemit].seconds());
 678   tty->print_cr("       Code Installation:   %7.3f s",    timers[_t_codeinstall].seconds());
 679 
 680   double other = timers[_t_compile].seconds() -
 681       (timers[_t_setup].seconds() +
 682        timers[_t_buildIR].seconds() +
 683        timers[_t_emit_lir].seconds() +
 684        timers[_t_codeemit].seconds() +
 685        timers[_t_codeinstall].seconds());
 686   if (other > 0) {
 687     tty->print_cr("       Other:               %7.3f s", other);
 688   }
 689 
 690   NOT_PRODUCT(LinearScan::print_statistics());
 691 }
 692 
 693 
 694 #ifndef PRODUCT
 695 void Compilation::compile_only_this_method() {
 696   ResourceMark rm;
 697   fileStream stream(fopen("c1_compile_only", "wt"));
 698   stream.print_cr("# c1 compile only directives");
 699   compile_only_this_scope(&stream, hir()->top_scope());
 700 }
 701 
 702 
 703 void Compilation::compile_only_this_scope(outputStream* st, IRScope* scope) {
 704   st->print("CompileOnly=");
 705   scope->method()->holder()->name()->print_symbol_on(st);
 706   st->print(".");
 707   scope->method()->name()->print_symbol_on(st);
 708   st->cr();
 709 }
 710 
 711 
 712 void Compilation::exclude_this_method() {
 713   fileStream stream(fopen(".hotspot_compiler", "at"));
 714   stream.print("exclude ");
 715   method()->holder()->name()->print_symbol_on(&stream);
 716   stream.print(" ");
 717   method()->name()->print_symbol_on(&stream);
 718   stream.cr();
 719   stream.cr();
 720 }
 721 #endif