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 
  41 typedef enum {
  42   _t_compile,
  43     _t_setup,
  44     _t_buildIR,
  45       _t_hir_parse,
  46       _t_gvn,
  47       _t_optimize_blocks,
  48       _t_optimize_null_checks,
  49       _t_rangeCheckElimination,
  50     _t_emit_lir,
  51       _t_linearScan,
  52       _t_lirGeneration,
  53     _t_codeemit,
  54     _t_codeinstall,
  55   max_phase_timers
  56 } TimerName;
  57 
  58 static const char * timer_name[] = {
  59   "compile",
  60   "setup",
  61   "buildIR",
  62   "parse_hir",
  63   "gvn",
  64   "optimize_blocks",
  65   "optimize_null_checks",
  66   "rangeCheckElimination",
  67   "emit_lir",
  68   "linearScan",
  69   "lirGeneration",
  70   "codeemit",
  71   "codeinstall"
  72 };
  73 
  74 static elapsedTimer timers[max_phase_timers];
  75 static int totalInstructionNodes = 0;
  76 
  77 class PhaseTraceTime: public TraceTime {
  78  private:
  79   JavaThread* _thread;
  80   CompileLog* _log;
  81   TimerName _timer;
  82 
  83  public:
  84   PhaseTraceTime(TimerName timer)
  85   : TraceTime("", &timers[timer], CITime || CITimeEach, Verbose),
  86     _log(NULL), _timer(timer)
  87   {
  88     if (Compilation::current() != NULL) {
  89       _log = Compilation::current()->log();
  90     }
  91 
  92     if (_log != NULL) {
  93       _log->begin_head("phase name='%s'", timer_name[_timer]);
  94       _log->stamp();
  95       _log->end_head();
  96     }
  97   }
  98 
  99   ~PhaseTraceTime() {
 100     if (_log != NULL)
 101       _log->done("phase name='%s'", timer_name[_timer]);
 102   }
 103 };
 104 
 105 // Implementation of Compilation
 106 
 107 
 108 #ifndef PRODUCT
 109 
 110 void Compilation::maybe_print_current_instruction() {
 111   if (_current_instruction != NULL && _last_instruction_printed != _current_instruction) {
 112     _last_instruction_printed = _current_instruction;
 113     _current_instruction->print_line();
 114   }
 115 }
 116 #endif // PRODUCT
 117 
 118 
 119 DebugInformationRecorder* Compilation::debug_info_recorder() const {
 120   return _env->debug_info();
 121 }
 122 
 123 
 124 Dependencies* Compilation::dependency_recorder() const {
 125   return _env->dependencies();
 126 }
 127 
 128 
 129 void Compilation::initialize() {
 130   // Use an oop recorder bound to the CI environment.
 131   // (The default oop recorder is ignorant of the CI.)
 132   OopRecorder* ooprec = new OopRecorder(_env->arena());
 133   _env->set_oop_recorder(ooprec);
 134   _env->set_debug_info(new DebugInformationRecorder(ooprec));
 135   debug_info_recorder()->set_oopmaps(new OopMapSet());
 136   _env->set_dependencies(new Dependencies(_env));
 137 }
 138 
 139 
 140 void Compilation::build_hir() {
 141   CHECK_BAILOUT();
 142 
 143   // setup ir
 144   CompileLog* log = this->log();
 145   if (log != NULL) {
 146     log->begin_head("parse method='%d' ",
 147                     log->identify(_method));
 148     log->stamp();
 149     log->end_head();
 150   }
 151   {
 152     PhaseTraceTime timeit(_t_hir_parse);
 153     _hir = new IR(this, method(), osr_bci());
 154   }
 155   if (log)  log->done("parse");
 156   if (!_hir->is_valid()) {
 157     bailout("invalid parsing");
 158     return;
 159   }
 160 
 161 #ifndef PRODUCT
 162   if (PrintCFGToFile) {
 163     CFGPrinter::print_cfg(_hir, "After Generation of HIR", true, false);
 164   }
 165 #endif
 166 
 167 #ifndef PRODUCT
 168   if (PrintCFG || PrintCFG0) { tty->print_cr("CFG after parsing"); _hir->print(true); }
 169   if (PrintIR  || PrintIR0 ) { tty->print_cr("IR after parsing"); _hir->print(false); }
 170 #endif
 171 
 172   _hir->verify();
 173 
 174   if (UseC1Optimizations) {
 175     NEEDS_CLEANUP
 176     // optimization
 177     PhaseTraceTime timeit(_t_optimize_blocks);
 178 
 179     _hir->optimize_blocks();
 180   }
 181 
 182   _hir->verify();
 183 
 184   _hir->split_critical_edges();
 185 
 186 #ifndef PRODUCT
 187   if (PrintCFG || PrintCFG1) { tty->print_cr("CFG after optimizations"); _hir->print(true); }
 188   if (PrintIR  || PrintIR1 ) { tty->print_cr("IR after optimizations"); _hir->print(false); }
 189 #endif
 190 
 191   _hir->verify();
 192 
 193   // compute block ordering for code generation
 194   // the control flow must not be changed from here on
 195   _hir->compute_code();
 196 
 197   if (UseGlobalValueNumbering) {
 198     // No resource mark here! LoopInvariantCodeMotion can allocate ValueStack objects.
 199     PhaseTraceTime timeit(_t_gvn);
 200     int instructions = Instruction::number_of_instructions();
 201     GlobalValueNumbering gvn(_hir);
 202     assert(instructions == Instruction::number_of_instructions(),
 203            "shouldn't have created an instructions");
 204   }
 205 
 206   _hir->verify();
 207 
 208 #ifndef PRODUCT
 209   if (PrintCFGToFile) {
 210     CFGPrinter::print_cfg(_hir, "Before RangeCheckElimination", true, false);
 211   }
 212 #endif
 213 
 214   if (RangeCheckElimination) {
 215     if (_hir->osr_entry() == NULL) {
 216       PhaseTraceTime timeit(_t_rangeCheckElimination);
 217       RangeCheckElimination::eliminate(_hir);
 218     }
 219   }
 220 
 221 #ifndef PRODUCT
 222   if (PrintCFGToFile) {
 223     CFGPrinter::print_cfg(_hir, "After RangeCheckElimination", true, false);
 224   }
 225 #endif
 226 
 227   if (UseC1Optimizations) {
 228     // loop invariant code motion reorders instructions and range
 229     // check elimination adds new instructions so do null check
 230     // elimination after.
 231     NEEDS_CLEANUP
 232     // optimization
 233     PhaseTraceTime timeit(_t_optimize_null_checks);
 234 
 235     _hir->eliminate_null_checks();
 236   }
 237 
 238   _hir->verify();
 239 
 240   // compute use counts after global value numbering
 241   _hir->compute_use_counts();
 242 
 243 #ifndef PRODUCT
 244   if (PrintCFG || PrintCFG2) { tty->print_cr("CFG before code generation"); _hir->code()->print(true); }
 245   if (PrintIR  || PrintIR2 ) { tty->print_cr("IR before code generation"); _hir->code()->print(false, true); }
 246 #endif
 247 
 248   _hir->verify();
 249 }
 250 
 251 
 252 void Compilation::emit_lir() {
 253   CHECK_BAILOUT();
 254 
 255   LIRGenerator gen(this, method());
 256   {
 257     PhaseTraceTime timeit(_t_lirGeneration);
 258     hir()->iterate_linear_scan_order(&gen);
 259   }
 260 
 261   CHECK_BAILOUT();
 262 
 263   {
 264     PhaseTraceTime timeit(_t_linearScan);
 265 
 266     LinearScan* allocator = new LinearScan(hir(), &gen, frame_map());
 267     set_allocator(allocator);
 268     // Assign physical registers to LIR operands using a linear scan algorithm.
 269     allocator->do_linear_scan();
 270     CHECK_BAILOUT();
 271 
 272     _max_spills = allocator->max_spills();
 273   }
 274 
 275   if (BailoutAfterLIR) {
 276     if (PrintLIR && !bailed_out()) {
 277       print_LIR(hir()->code());
 278     }
 279     bailout("Bailing out because of -XX:+BailoutAfterLIR");
 280   }
 281 }
 282 
 283 
 284 void Compilation::emit_code_epilog(LIR_Assembler* assembler) {
 285   CHECK_BAILOUT();
 286 
 287   CodeOffsets* code_offsets = assembler->offsets();
 288 
 289   // generate code or slow cases
 290   assembler->emit_slow_case_stubs();
 291   CHECK_BAILOUT();
 292 
 293   // generate exception adapters
 294   assembler->emit_exception_entries(exception_info_list());
 295   CHECK_BAILOUT();
 296 
 297   // Generate code for exception handler.
 298   code_offsets->set_value(CodeOffsets::Exceptions, assembler->emit_exception_handler());
 299   CHECK_BAILOUT();
 300 
 301   // Generate code for deopt handler.
 302   code_offsets->set_value(CodeOffsets::Deopt, assembler->emit_deopt_handler());
 303   CHECK_BAILOUT();
 304 
 305   // Emit the MethodHandle deopt handler code (if required).
 306   if (has_method_handle_invokes()) {
 307     // We can use the same code as for the normal deopt handler, we
 308     // just need a different entry point address.
 309     code_offsets->set_value(CodeOffsets::DeoptMH, assembler->emit_deopt_handler());
 310     CHECK_BAILOUT();
 311   }
 312 
 313   // Emit the handler to remove the activation from the stack and
 314   // dispatch to the caller.
 315   offsets()->set_value(CodeOffsets::UnwindHandler, assembler->emit_unwind_handler());
 316 
 317   // done
 318   masm()->flush();
 319 }
 320 
 321 
 322 bool Compilation::setup_code_buffer(CodeBuffer* code, int call_stub_estimate) {
 323   // Preinitialize the consts section to some large size:
 324   int locs_buffer_size = 20 * (relocInfo::length_limit + sizeof(relocInfo));
 325   char* locs_buffer = NEW_RESOURCE_ARRAY(char, locs_buffer_size);
 326   code->insts()->initialize_shared_locs((relocInfo*)locs_buffer,
 327                                         locs_buffer_size / sizeof(relocInfo));
 328   code->initialize_consts_size(Compilation::desired_max_constant_size());
 329   // Call stubs + two deopt handlers (regular and MH) + exception handler
 330   int call_stub_size = LIR_Assembler::call_stub_size;
 331   int stub_size = (call_stub_estimate * 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     for (int i = 0; i < handlers->length(); i++) {
 504       XHandler* handler = handlers->handler_at(i);
 505       assert(handler->entry_pco() != -1, "must have been generated");
 506 
 507       int e = bcis->find(handler->handler_bci());
 508       if (e >= 0 && scope_depths->at(e) == handler->scope_count()) {
 509         // two different handlers are declared to dispatch to the same
 510         // catch bci.  During parsing we created edges for each
 511         // handler but we really only need one.  The exception handler
 512         // table will also get unhappy if we try to declare both since
 513         // it's nonsensical.  Just skip this handler.
 514         continue;
 515       }
 516 
 517       bcis->append(handler->handler_bci());
 518       if (handler->handler_bci() == -1) {
 519         // insert a wildcard handler at scope depth 0 so that the
 520         // exception lookup logic with find it.
 521         scope_depths->append(0);
 522       } else {
 523         scope_depths->append(handler->scope_count());
 524     }
 525       pcos->append(handler->entry_pco());
 526 
 527       // stop processing once we hit a catch any
 528       if (handler->is_catch_all()) {
 529         assert(i == handlers->length() - 1, "catch all must be last handler");
 530   }
 531     }
 532     exception_handler_table()->add_subtable(info->pco(), bcis, scope_depths, pcos);
 533   }
 534 }
 535 
 536 
 537 Compilation::Compilation(AbstractCompiler* compiler, ciEnv* env, ciMethod* method,
 538                          int osr_bci, BufferBlob* buffer_blob, DirectiveSet* directive)
 539 : _compiler(compiler)
 540 , _env(env)
 541 , _directive(directive)
 542 , _log(env->log())
 543 , _method(method)
 544 , _osr_bci(osr_bci)
 545 , _hir(NULL)
 546 , _max_spills(-1)
 547 , _frame_map(NULL)
 548 , _masm(NULL)
 549 , _has_exception_handlers(false)
 550 , _has_fpu_code(true)   // pessimistic assumption
 551 , _would_profile(false)
 552 , _has_unsafe_access(false)
 553 , _has_method_handle_invokes(false)
 554 , _has_reserved_stack_access(method->has_reserved_stack_access())
 555 , _bailout_msg(NULL)
 556 , _exception_info_list(NULL)
 557 , _allocator(NULL)
 558 , _next_id(0)
 559 , _next_block_id(0)
 560 , _code(buffer_blob)
 561 , _has_access_indexed(false)
 562 , _current_instruction(NULL)
 563 , _interpreter_frame_size(0)
 564 #ifndef PRODUCT
 565 , _last_instruction_printed(NULL)
 566 #endif // PRODUCT
 567 {
 568   PhaseTraceTime timeit(_t_compile);
 569   _arena = Thread::current()->resource_area();
 570   _env->set_compiler_data(this);
 571   _exception_info_list = new ExceptionInfoList();
 572   _implicit_exception_table.set_size(0);
 573   compile_method();
 574   if (bailed_out()) {
 575     _env->record_method_not_compilable(bailout_msg(), !TieredCompilation);
 576     if (is_profiling()) {
 577       // Compilation failed, create MDO, which would signal the interpreter
 578       // to start profiling on its own.
 579       _method->ensure_method_data();
 580     }
 581   } else if (is_profiling()) {
 582     ciMethodData *md = method->method_data_or_null();
 583     if (md != NULL) {
 584       md->set_would_profile(_would_profile);
 585     }
 586   }
 587 }
 588 
 589 Compilation::~Compilation() {
 590   _env->set_compiler_data(NULL);
 591 }
 592 
 593 void Compilation::add_exception_handlers_for_pco(int pco, XHandlers* exception_handlers) {
 594 #ifndef PRODUCT
 595   if (PrintExceptionHandlers && Verbose) {
 596     tty->print_cr("  added exception scope for pco %d", pco);
 597   }
 598 #endif
 599   // Note: we do not have program counters for these exception handlers yet
 600   exception_info_list()->push(new ExceptionInfo(pco, exception_handlers));
 601 }
 602 
 603 
 604 void Compilation::notice_inlined_method(ciMethod* method) {
 605   _env->notice_inlined_method(method);
 606 }
 607 
 608 
 609 void Compilation::bailout(const char* msg) {
 610   assert(msg != NULL, "bailout message must exist");
 611   if (!bailed_out()) {
 612     // keep first bailout message
 613     if (PrintCompilation || PrintBailouts) tty->print_cr("compilation bailout: %s", msg);
 614     _bailout_msg = msg;
 615   }
 616 }
 617 
 618 ciKlass* Compilation::cha_exact_type(ciType* type) {
 619   if (type != NULL && type->is_loaded() && type->is_instance_klass()) {
 620     ciInstanceKlass* ik = type->as_instance_klass();
 621     assert(ik->exact_klass() == NULL, "no cha for final klass");
 622     if (DeoptC1 && UseCHA && !(ik->has_subklass() || ik->is_interface())) {
 623       dependency_recorder()->assert_leaf_type(ik);
 624       return ik;
 625     }
 626   }
 627   return NULL;
 628 }
 629 
 630 void Compilation::print_timers() {
 631   tty->print_cr("    C1 Compile Time:      %7.3f s",      timers[_t_compile].seconds());
 632   tty->print_cr("       Setup time:          %7.3f s",    timers[_t_setup].seconds());
 633 
 634   {
 635     tty->print_cr("       Build HIR:           %7.3f s",    timers[_t_buildIR].seconds());
 636     tty->print_cr("         Parse:               %7.3f s", timers[_t_hir_parse].seconds());
 637     tty->print_cr("         Optimize blocks:     %7.3f s", timers[_t_optimize_blocks].seconds());
 638     tty->print_cr("         GVN:                 %7.3f s", timers[_t_gvn].seconds());
 639     tty->print_cr("         Null checks elim:    %7.3f s", timers[_t_optimize_null_checks].seconds());
 640     tty->print_cr("         Range checks elim:   %7.3f s", timers[_t_rangeCheckElimination].seconds());
 641 
 642     double other = timers[_t_buildIR].seconds() -
 643       (timers[_t_hir_parse].seconds() +
 644        timers[_t_optimize_blocks].seconds() +
 645        timers[_t_gvn].seconds() +
 646        timers[_t_optimize_null_checks].seconds() +
 647        timers[_t_rangeCheckElimination].seconds());
 648     if (other > 0) {
 649       tty->print_cr("         Other:               %7.3f s", other);
 650     }
 651   }
 652 
 653   {
 654     tty->print_cr("       Emit LIR:            %7.3f s",    timers[_t_emit_lir].seconds());
 655     tty->print_cr("         LIR Gen:             %7.3f s",   timers[_t_lirGeneration].seconds());
 656     tty->print_cr("         Linear Scan:         %7.3f s",   timers[_t_linearScan].seconds());
 657     NOT_PRODUCT(LinearScan::print_timers(timers[_t_linearScan].seconds()));
 658 
 659     double other = timers[_t_emit_lir].seconds() -
 660       (timers[_t_lirGeneration].seconds() +
 661        timers[_t_linearScan].seconds());
 662     if (other > 0) {
 663       tty->print_cr("         Other:               %7.3f s", other);
 664     }
 665   }
 666 
 667   tty->print_cr("       Code Emission:       %7.3f s",    timers[_t_codeemit].seconds());
 668   tty->print_cr("       Code Installation:   %7.3f s",    timers[_t_codeinstall].seconds());
 669 
 670   double other = timers[_t_compile].seconds() -
 671       (timers[_t_setup].seconds() +
 672        timers[_t_buildIR].seconds() +
 673        timers[_t_emit_lir].seconds() +
 674        timers[_t_codeemit].seconds() +
 675        timers[_t_codeinstall].seconds());
 676   if (other > 0) {
 677     tty->print_cr("       Other:               %7.3f s", other);
 678   }
 679 
 680   NOT_PRODUCT(LinearScan::print_statistics());
 681 }
 682 
 683 
 684 #ifndef PRODUCT
 685 void Compilation::compile_only_this_method() {
 686   ResourceMark rm;
 687   fileStream stream(fopen("c1_compile_only", "wt"));
 688   stream.print_cr("# c1 compile only directives");
 689   compile_only_this_scope(&stream, hir()->top_scope());
 690 }
 691 
 692 
 693 void Compilation::compile_only_this_scope(outputStream* st, IRScope* scope) {
 694   st->print("CompileOnly=");
 695   scope->method()->holder()->name()->print_symbol_on(st);
 696   st->print(".");
 697   scope->method()->name()->print_symbol_on(st);
 698   st->cr();
 699 }
 700 
 701 
 702 void Compilation::exclude_this_method() {
 703   fileStream stream(fopen(".hotspot_compiler", "at"));
 704   stream.print("exclude ");
 705   method()->holder()->name()->print_symbol_on(&stream);
 706   stream.print(" ");
 707   method()->name()->print_symbol_on(&stream);
 708   stream.cr();
 709   stream.cr();
 710 }
 711 #endif