1 /* 2 * Copyright (c) 1998, 2012, 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 "ci/ciReplay.hpp" 27 #include "classfile/systemDictionary.hpp" 28 #include "classfile/vmSymbols.hpp" 29 #include "compiler/compileBroker.hpp" 30 #include "compiler/compileLog.hpp" 31 #include "interpreter/linkResolver.hpp" 32 #include "oops/objArrayKlass.hpp" 33 #include "opto/callGenerator.hpp" 34 #include "opto/parse.hpp" 35 #include "runtime/handles.inline.hpp" 36 37 //============================================================================= 38 //------------------------------InlineTree------------------------------------- 39 InlineTree::InlineTree(Compile* c, 40 const InlineTree *caller_tree, ciMethod* callee, 41 JVMState* caller_jvms, int caller_bci, 42 float site_invoke_ratio, int max_inline_level) : 43 C(c), 44 _caller_jvms(caller_jvms), 45 _caller_tree((InlineTree*) caller_tree), 46 _method(callee), 47 _site_invoke_ratio(site_invoke_ratio), 48 _max_inline_level(max_inline_level), 49 _count_inline_bcs(method()->code_size_for_inlining()), 50 _subtrees(c->comp_arena(), 2, 0, NULL), 51 _msg(NULL) 52 { 53 NOT_PRODUCT(_count_inlines = 0;) 54 if (_caller_jvms != NULL) { 55 // Keep a private copy of the caller_jvms: 56 _caller_jvms = new (C) JVMState(caller_jvms->method(), caller_tree->caller_jvms()); 57 _caller_jvms->set_bci(caller_jvms->bci()); 58 assert(!caller_jvms->should_reexecute(), "there should be no reexecute bytecode with inlining"); 59 } 60 assert(_caller_jvms->same_calls_as(caller_jvms), "consistent JVMS"); 61 assert((caller_tree == NULL ? 0 : caller_tree->stack_depth() + 1) == stack_depth(), "correct (redundant) depth parameter"); 62 assert(caller_bci == this->caller_bci(), "correct (redundant) bci parameter"); 63 if (UseOldInlining) { 64 // Update hierarchical counts, count_inline_bcs() and count_inlines() 65 InlineTree *caller = (InlineTree *)caller_tree; 66 for( ; caller != NULL; caller = ((InlineTree *)(caller->caller_tree())) ) { 67 caller->_count_inline_bcs += count_inline_bcs(); 68 NOT_PRODUCT(caller->_count_inlines++;) 69 } 70 } 71 } 72 73 InlineTree::InlineTree(Compile* c, ciMethod* callee_method, JVMState* caller_jvms, 74 float site_invoke_ratio, int max_inline_level) : 75 C(c), 76 _caller_jvms(caller_jvms), 77 _caller_tree(NULL), 78 _method(callee_method), 79 _site_invoke_ratio(site_invoke_ratio), 80 _max_inline_level(max_inline_level), 81 _count_inline_bcs(method()->code_size()), 82 _msg(NULL) 83 { 84 NOT_PRODUCT(_count_inlines = 0;) 85 assert(!UseOldInlining, "do not use for old stuff"); 86 } 87 88 /** 89 * Return true when EA is ON and a java constructor is called or 90 * a super constructor is called from an inlined java constructor. 91 * Also return true for boxing methods. 92 */ 93 static bool is_init_with_ea(ciMethod* callee_method, 94 ciMethod* caller_method, Compile* C) { 95 if (!C->do_escape_analysis() || !EliminateAllocations) { 96 return false; // EA is off 97 } 98 if (callee_method->is_initializer()) { 99 return true; // constuctor 100 } 101 if (caller_method->is_initializer() && 102 caller_method != C->method() && 103 caller_method->holder()->is_subclass_of(callee_method->holder())) { 104 return true; // super constructor is called from inlined constructor 105 } 106 if (C->eliminate_boxing() && callee_method->is_boxing_method()) { 107 return true; 108 } 109 return false; 110 } 111 112 /** 113 * Force inlining unboxing accessor. 114 */ 115 static bool is_unboxing_method(ciMethod* callee_method, Compile* C) { 116 return C->eliminate_boxing() && callee_method->is_unboxing_method(); 117 } 118 119 // positive filter: should callee be inlined? 120 bool InlineTree::should_inline(ciMethod* callee_method, ciMethod* caller_method, 121 int caller_bci, ciCallProfile& profile, 122 WarmCallInfo* wci_result) { 123 // Allows targeted inlining 124 if(callee_method->should_inline()) { 125 *wci_result = *(WarmCallInfo::always_hot()); 126 if (C->print_inlining() && Verbose) { 127 CompileTask::print_inline_indent(inline_level()); 128 tty->print_cr("Inlined method is hot: "); 129 } 130 set_msg("force inline by CompilerOracle"); 131 return true; 132 } 133 134 int size = callee_method->code_size_for_inlining(); 135 136 // Check for too many throws (and not too huge) 137 if(callee_method->interpreter_throwout_count() > InlineThrowCount && 138 size < InlineThrowMaxSize ) { 139 wci_result->set_profit(wci_result->profit() * 100); 140 if (C->print_inlining() && Verbose) { 141 CompileTask::print_inline_indent(inline_level()); 142 tty->print_cr("Inlined method with many throws (throws=%d):", callee_method->interpreter_throwout_count()); 143 } 144 set_msg("many throws"); 145 return true; 146 } 147 148 if (!UseOldInlining) { 149 set_msg("!UseOldInlining"); 150 return true; // size and frequency are represented in a new way 151 } 152 153 int default_max_inline_size = C->max_inline_size(); 154 int inline_small_code_size = InlineSmallCode / 4; 155 int max_inline_size = default_max_inline_size; 156 157 int call_site_count = method()->scale_count(profile.count()); 158 int invoke_count = method()->interpreter_invocation_count(); 159 160 assert(invoke_count != 0, "require invocation count greater than zero"); 161 int freq = call_site_count / invoke_count; 162 163 // bump the max size if the call is frequent 164 if ((freq >= InlineFrequencyRatio) || 165 (call_site_count >= InlineFrequencyCount) || 166 is_unboxing_method(callee_method, C) || 167 is_init_with_ea(callee_method, caller_method, C)) { 168 169 max_inline_size = C->freq_inline_size(); 170 if (size <= max_inline_size && TraceFrequencyInlining) { 171 CompileTask::print_inline_indent(inline_level()); 172 tty->print_cr("Inlined frequent method (freq=%d count=%d):", freq, call_site_count); 173 CompileTask::print_inline_indent(inline_level()); 174 callee_method->print(); 175 tty->cr(); 176 } 177 } else { 178 // Not hot. Check for medium-sized pre-existing nmethod at cold sites. 179 if (callee_method->has_compiled_code() && 180 callee_method->instructions_size() > inline_small_code_size) { 181 set_msg("already compiled into a medium method"); 182 return false; 183 } 184 } 185 if (size > max_inline_size) { 186 if (max_inline_size > default_max_inline_size) { 187 set_msg("hot method too big"); 188 } else { 189 set_msg("too big"); 190 } 191 return false; 192 } 193 return true; 194 } 195 196 197 // negative filter: should callee NOT be inlined? 198 bool InlineTree::should_not_inline(ciMethod *callee_method, 199 ciMethod* caller_method, 200 JVMState* jvms, 201 WarmCallInfo* wci_result) { 202 203 const char* fail_msg = NULL; 204 205 // First check all inlining restrictions which are required for correctness 206 if ( callee_method->is_abstract()) { 207 fail_msg = "abstract method"; // // note: we allow ik->is_abstract() 208 } else if (!callee_method->holder()->is_initialized()) { 209 fail_msg = "method holder not initialized"; 210 } else if ( callee_method->is_native()) { 211 fail_msg = "native method"; 212 } else if ( callee_method->dont_inline()) { 213 fail_msg = "don't inline by annotation"; 214 } 215 216 if (!UseOldInlining) { 217 if (fail_msg != NULL) { 218 *wci_result = *(WarmCallInfo::always_cold()); 219 set_msg(fail_msg); 220 return true; 221 } 222 223 if (callee_method->has_unloaded_classes_in_signature()) { 224 wci_result->set_profit(wci_result->profit() * 0.1); 225 } 226 227 // don't inline exception code unless the top method belongs to an 228 // exception class 229 if (callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { 230 ciMethod* top_method = jvms->caller() != NULL ? jvms->caller()->of_depth(1)->method() : method(); 231 if (!top_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { 232 wci_result->set_profit(wci_result->profit() * 0.1); 233 } 234 } 235 236 if (callee_method->has_compiled_code() && 237 callee_method->instructions_size() > InlineSmallCode) { 238 wci_result->set_profit(wci_result->profit() * 0.1); 239 // %%% adjust wci_result->size()? 240 } 241 242 return false; 243 } 244 245 // one more inlining restriction 246 if (fail_msg == NULL && callee_method->has_unloaded_classes_in_signature()) { 247 fail_msg = "unloaded signature classes"; 248 } 249 250 if (fail_msg != NULL) { 251 set_msg(fail_msg); 252 return true; 253 } 254 255 // ignore heuristic controls on inlining 256 if (callee_method->should_inline()) { 257 set_msg("force inline by CompilerOracle"); 258 return false; 259 } 260 261 if (callee_method->should_not_inline()) { 262 set_msg("disallowed by CompilerOracle"); 263 return true; 264 } 265 266 #ifndef PRODUCT 267 if (ciReplay::should_not_inline(callee_method)) { 268 set_msg("disallowed by ciReplay"); 269 return true; 270 } 271 #endif 272 273 // Now perform checks which are heuristic 274 275 if (is_unboxing_method(callee_method, C)) { 276 // Inline unboxing methods. 277 return false; 278 } 279 280 if (!callee_method->force_inline()) { 281 if (callee_method->has_compiled_code() && 282 callee_method->instructions_size() > InlineSmallCode) { 283 set_msg("already compiled into a big method"); 284 return true; 285 } 286 } 287 288 // don't inline exception code unless the top method belongs to an 289 // exception class 290 if (caller_tree() != NULL && 291 callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { 292 const InlineTree *top = this; 293 while (top->caller_tree() != NULL) top = top->caller_tree(); 294 ciInstanceKlass* k = top->method()->holder(); 295 if (!k->is_subclass_of(C->env()->Throwable_klass())) { 296 set_msg("exception method"); 297 return true; 298 } 299 } 300 301 // use frequency-based objections only for non-trivial methods 302 if (callee_method->code_size() <= MaxTrivialSize) { 303 return false; 304 } 305 306 // don't use counts with -Xcomp or CTW 307 if (UseInterpreter && !CompileTheWorld) { 308 309 if (!callee_method->has_compiled_code() && 310 !callee_method->was_executed_more_than(0)) { 311 set_msg("never executed"); 312 return true; 313 } 314 315 if (is_init_with_ea(callee_method, caller_method, C)) { 316 // Escape Analysis: inline all executed constructors 317 return false; 318 } else if (!callee_method->was_executed_more_than(MIN2(MinInliningThreshold, 319 CompileThreshold >> 1))) { 320 set_msg("executed < MinInliningThreshold times"); 321 return true; 322 } 323 } 324 325 return false; 326 } 327 328 //-----------------------------try_to_inline----------------------------------- 329 // return true if ok 330 // Relocated from "InliningClosure::try_to_inline" 331 bool InlineTree::try_to_inline(ciMethod* callee_method, ciMethod* caller_method, 332 int caller_bci, JVMState* jvms, ciCallProfile& profile, 333 WarmCallInfo* wci_result, bool& should_delay) { 334 335 // Old algorithm had funny accumulating BC-size counters 336 if (UseOldInlining && ClipInlining 337 && (int)count_inline_bcs() >= DesiredMethodLimit) { 338 if (!callee_method->force_inline() || !IncrementalInline) { 339 set_msg("size > DesiredMethodLimit"); 340 return false; 341 } else if (!C->inlining_incrementally()) { 342 should_delay = true; 343 } 344 } 345 346 if (!should_inline(callee_method, caller_method, caller_bci, profile, 347 wci_result)) { 348 return false; 349 } 350 if (should_not_inline(callee_method, caller_method, jvms, wci_result)) { 351 return false; 352 } 353 354 if (InlineAccessors && callee_method->is_accessor()) { 355 // accessor methods are not subject to any of the following limits. 356 set_msg("accessor"); 357 return true; 358 } 359 360 // suppress a few checks for accessors and trivial methods 361 if (callee_method->code_size() > MaxTrivialSize) { 362 363 // don't inline into giant methods 364 if (C->over_inlining_cutoff()) { 365 if ((!callee_method->force_inline() && !caller_method->is_compiled_lambda_form()) 366 || !IncrementalInline) { 367 set_msg("NodeCountInliningCutoff"); 368 return false; 369 } else { 370 should_delay = true; 371 } 372 } 373 374 if ((!UseInterpreter || CompileTheWorld) && 375 is_init_with_ea(callee_method, caller_method, C)) { 376 377 // Escape Analysis stress testing when running Xcomp or CTW: 378 // inline constructors even if they are not reached. 379 380 } else if (profile.count() == 0) { 381 // don't inline unreached call sites 382 set_msg("call site not reached"); 383 return false; 384 } 385 } 386 387 if (!C->do_inlining() && InlineAccessors) { 388 set_msg("not an accessor"); 389 return false; 390 } 391 if (inline_level() > _max_inline_level) { 392 if (callee_method->force_inline() && inline_level() > MaxForceInlineLevel) { 393 set_msg("MaxForceInlineLevel"); 394 return false; 395 } 396 if (!callee_method->force_inline() || !IncrementalInline) { 397 set_msg("inlining too deep"); 398 return false; 399 } else if (!C->inlining_incrementally()) { 400 should_delay = true; 401 } 402 } 403 404 // detect direct and indirect recursive inlining 405 { 406 // count the current method and the callee 407 const bool is_compiled_lambda_form = callee_method->is_compiled_lambda_form(); 408 int inline_level = 0; 409 if (!is_compiled_lambda_form) { 410 if (method() == callee_method) { 411 inline_level++; 412 } 413 } 414 // count callers of current method and callee 415 Node* callee_argument0 = is_compiled_lambda_form ? jvms->map()->argument(jvms, 0)->uncast() : NULL; 416 for (JVMState* j = jvms->caller(); j != NULL && j->has_method(); j = j->caller()) { 417 if (j->method() == callee_method) { 418 if (is_compiled_lambda_form) { 419 // Since compiled lambda forms are heavily reused we allow recursive inlining. If it is truly 420 // a recursion (using the same "receiver") we limit inlining otherwise we can easily blow the 421 // compiler stack. 422 Node* caller_argument0 = j->map()->argument(j, 0)->uncast(); 423 if (caller_argument0 == callee_argument0) { 424 inline_level++; 425 } 426 } else { 427 inline_level++; 428 } 429 } 430 } 431 if (inline_level > MaxRecursiveInlineLevel) { 432 set_msg("recursive inlining is too deep"); 433 return false; 434 } 435 } 436 437 int size = callee_method->code_size_for_inlining(); 438 439 if (UseOldInlining && ClipInlining 440 && (int)count_inline_bcs() + size >= DesiredMethodLimit) { 441 if (!callee_method->force_inline() || !IncrementalInline) { 442 set_msg("size > DesiredMethodLimit"); 443 return false; 444 } else if (!C->inlining_incrementally()) { 445 should_delay = true; 446 } 447 } 448 449 // ok, inline this method 450 return true; 451 } 452 453 //------------------------------pass_initial_checks---------------------------- 454 bool pass_initial_checks(ciMethod* caller_method, int caller_bci, ciMethod* callee_method) { 455 ciInstanceKlass *callee_holder = callee_method ? callee_method->holder() : NULL; 456 // Check if a callee_method was suggested 457 if( callee_method == NULL ) return false; 458 // Check if klass of callee_method is loaded 459 if( !callee_holder->is_loaded() ) return false; 460 if( !callee_holder->is_initialized() ) return false; 461 if( !UseInterpreter || CompileTheWorld /* running Xcomp or CTW */ ) { 462 // Checks that constant pool's call site has been visited 463 // stricter than callee_holder->is_initialized() 464 ciBytecodeStream iter(caller_method); 465 iter.force_bci(caller_bci); 466 Bytecodes::Code call_bc = iter.cur_bc(); 467 // An invokedynamic instruction does not have a klass. 468 if (call_bc != Bytecodes::_invokedynamic) { 469 int index = iter.get_index_u2_cpcache(); 470 if (!caller_method->is_klass_loaded(index, true)) { 471 return false; 472 } 473 // Try to do constant pool resolution if running Xcomp 474 if( !caller_method->check_call(index, call_bc == Bytecodes::_invokestatic) ) { 475 return false; 476 } 477 } 478 } 479 // We will attempt to see if a class/field/etc got properly loaded. If it 480 // did not, it may attempt to throw an exception during our probing. Catch 481 // and ignore such exceptions and do not attempt to compile the method. 482 if( callee_method->should_exclude() ) return false; 483 484 return true; 485 } 486 487 //------------------------------check_can_parse-------------------------------- 488 const char* InlineTree::check_can_parse(ciMethod* callee) { 489 // Certain methods cannot be parsed at all: 490 if ( callee->is_native()) return "native method"; 491 if ( callee->is_abstract()) return "abstract method"; 492 if (!callee->can_be_compiled()) return "not compilable (disabled)"; 493 if (!callee->has_balanced_monitors()) return "not compilable (unbalanced monitors)"; 494 if ( callee->get_flow_analysis()->failing()) return "not compilable (flow analysis failed)"; 495 return NULL; 496 } 497 498 //------------------------------print_inlining--------------------------------- 499 void InlineTree::print_inlining(ciMethod* callee_method, int caller_bci, 500 bool success) const { 501 const char* inline_msg = msg(); 502 assert(inline_msg != NULL, "just checking"); 503 if (C->log() != NULL) { 504 if (success) { 505 C->log()->inline_success(inline_msg); 506 } else { 507 C->log()->inline_fail(inline_msg); 508 } 509 } 510 if (C->print_inlining()) { 511 C->print_inlining(callee_method, inline_level(), caller_bci, inline_msg); 512 if (callee_method == NULL) tty->print(" callee not monotonic or profiled"); 513 if (Verbose && callee_method) { 514 const InlineTree *top = this; 515 while( top->caller_tree() != NULL ) { top = top->caller_tree(); } 516 //tty->print(" bcs: %d+%d invoked: %d", top->count_inline_bcs(), callee_method->code_size(), callee_method->interpreter_invocation_count()); 517 } 518 } 519 } 520 521 //------------------------------ok_to_inline----------------------------------- 522 WarmCallInfo* InlineTree::ok_to_inline(ciMethod* callee_method, JVMState* jvms, ciCallProfile& profile, WarmCallInfo* initial_wci, bool& should_delay) { 523 assert(callee_method != NULL, "caller checks for optimized virtual!"); 524 assert(!should_delay, "should be initialized to false"); 525 #ifdef ASSERT 526 // Make sure the incoming jvms has the same information content as me. 527 // This means that we can eventually make this whole class AllStatic. 528 if (jvms->caller() == NULL) { 529 assert(_caller_jvms == NULL, "redundant instance state"); 530 } else { 531 assert(_caller_jvms->same_calls_as(jvms->caller()), "redundant instance state"); 532 } 533 assert(_method == jvms->method(), "redundant instance state"); 534 #endif 535 int caller_bci = jvms->bci(); 536 ciMethod* caller_method = jvms->method(); 537 538 // Do some initial checks. 539 if (!pass_initial_checks(caller_method, caller_bci, callee_method)) { 540 set_msg("failed initial checks"); 541 print_inlining(callee_method, caller_bci, false /* !success */); 542 return NULL; 543 } 544 545 // Do some parse checks. 546 set_msg(check_can_parse(callee_method)); 547 if (msg() != NULL) { 548 print_inlining(callee_method, caller_bci, false /* !success */); 549 return NULL; 550 } 551 552 // Check if inlining policy says no. 553 WarmCallInfo wci = *(initial_wci); 554 bool success = try_to_inline(callee_method, caller_method, caller_bci, 555 jvms, profile, &wci, should_delay); 556 557 #ifndef PRODUCT 558 if (UseOldInlining && InlineWarmCalls 559 && (PrintOpto || C->print_inlining())) { 560 bool cold = wci.is_cold(); 561 bool hot = !cold && wci.is_hot(); 562 bool old_cold = !success; 563 if (old_cold != cold || (Verbose || WizardMode)) { 564 if (msg() == NULL) { 565 set_msg("OK"); 566 } 567 tty->print(" OldInlining= %4s : %s\n WCI=", 568 old_cold ? "cold" : "hot", msg()); 569 wci.print(); 570 } 571 } 572 #endif 573 if (UseOldInlining) { 574 if (success) { 575 wci = *(WarmCallInfo::always_hot()); 576 } else { 577 wci = *(WarmCallInfo::always_cold()); 578 } 579 } 580 if (!InlineWarmCalls) { 581 if (!wci.is_cold() && !wci.is_hot()) { 582 // Do not inline the warm calls. 583 wci = *(WarmCallInfo::always_cold()); 584 } 585 } 586 587 if (!wci.is_cold()) { 588 // Inline! 589 if (msg() == NULL) { 590 set_msg("inline (hot)"); 591 } 592 print_inlining(callee_method, caller_bci, true /* success */); 593 if (UseOldInlining) 594 build_inline_tree_for_callee(callee_method, jvms, caller_bci); 595 if (InlineWarmCalls && !wci.is_hot()) 596 return new (C) WarmCallInfo(wci); // copy to heap 597 return WarmCallInfo::always_hot(); 598 } 599 600 // Do not inline 601 if (msg() == NULL) { 602 set_msg("too cold to inline"); 603 } 604 print_inlining(callee_method, caller_bci, false /* !success */ ); 605 return NULL; 606 } 607 608 //------------------------------compute_callee_frequency----------------------- 609 float InlineTree::compute_callee_frequency( int caller_bci ) const { 610 int count = method()->interpreter_call_site_count(caller_bci); 611 int invcnt = method()->interpreter_invocation_count(); 612 float freq = (float)count/(float)invcnt; 613 // Call-site count / interpreter invocation count, scaled recursively. 614 // Always between 0.0 and 1.0. Represents the percentage of the method's 615 // total execution time used at this call site. 616 617 return freq; 618 } 619 620 //------------------------------build_inline_tree_for_callee------------------- 621 InlineTree *InlineTree::build_inline_tree_for_callee( ciMethod* callee_method, JVMState* caller_jvms, int caller_bci) { 622 float recur_frequency = _site_invoke_ratio * compute_callee_frequency(caller_bci); 623 // Attempt inlining. 624 InlineTree* old_ilt = callee_at(caller_bci, callee_method); 625 if (old_ilt != NULL) { 626 return old_ilt; 627 } 628 int max_inline_level_adjust = 0; 629 if (caller_jvms->method() != NULL) { 630 if (caller_jvms->method()->is_compiled_lambda_form()) 631 max_inline_level_adjust += 1; // don't count actions in MH or indy adapter frames 632 else if (callee_method->is_method_handle_intrinsic() || 633 callee_method->is_compiled_lambda_form()) { 634 max_inline_level_adjust += 1; // don't count method handle calls from java.lang.invoke implem 635 } 636 if (max_inline_level_adjust != 0 && C->print_inlining() && (Verbose || WizardMode)) { 637 CompileTask::print_inline_indent(inline_level()); 638 tty->print_cr(" \\-> discounting inline depth"); 639 } 640 if (max_inline_level_adjust != 0 && C->log()) { 641 int id1 = C->log()->identify(caller_jvms->method()); 642 int id2 = C->log()->identify(callee_method); 643 C->log()->elem("inline_level_discount caller='%d' callee='%d'", id1, id2); 644 } 645 } 646 InlineTree* ilt = new InlineTree(C, this, callee_method, caller_jvms, caller_bci, recur_frequency, _max_inline_level + max_inline_level_adjust); 647 _subtrees.append(ilt); 648 649 NOT_PRODUCT( _count_inlines += 1; ) 650 651 return ilt; 652 } 653 654 655 //---------------------------------------callee_at----------------------------- 656 InlineTree *InlineTree::callee_at(int bci, ciMethod* callee) const { 657 for (int i = 0; i < _subtrees.length(); i++) { 658 InlineTree* sub = _subtrees.at(i); 659 if (sub->caller_bci() == bci && callee == sub->method()) { 660 return sub; 661 } 662 } 663 return NULL; 664 } 665 666 667 //------------------------------build_inline_tree_root------------------------- 668 InlineTree *InlineTree::build_inline_tree_root() { 669 Compile* C = Compile::current(); 670 671 // Root of inline tree 672 InlineTree* ilt = new InlineTree(C, NULL, C->method(), NULL, -1, 1.0F, MaxInlineLevel); 673 674 return ilt; 675 } 676 677 678 //-------------------------find_subtree_from_root----------------------------- 679 // Given a jvms, which determines a call chain from the root method, 680 // find the corresponding inline tree. 681 // Note: This method will be removed or replaced as InlineTree goes away. 682 InlineTree* InlineTree::find_subtree_from_root(InlineTree* root, JVMState* jvms, ciMethod* callee) { 683 InlineTree* iltp = root; 684 uint depth = jvms && jvms->has_method() ? jvms->depth() : 0; 685 for (uint d = 1; d <= depth; d++) { 686 JVMState* jvmsp = jvms->of_depth(d); 687 // Select the corresponding subtree for this bci. 688 assert(jvmsp->method() == iltp->method(), "tree still in sync"); 689 ciMethod* d_callee = (d == depth) ? callee : jvms->of_depth(d+1)->method(); 690 InlineTree* sub = iltp->callee_at(jvmsp->bci(), d_callee); 691 if (sub == NULL) { 692 if (d == depth) { 693 sub = iltp->build_inline_tree_for_callee(d_callee, jvmsp, jvmsp->bci()); 694 } 695 guarantee(sub != NULL, "should be a sub-ilt here"); 696 return sub; 697 } 698 iltp = sub; 699 } 700 return iltp; 701 } 702 703 704 705 #ifndef PRODUCT 706 void InlineTree::print_impl(outputStream* st, int indent) const { 707 for (int i = 0; i < indent; i++) st->print(" "); 708 st->print(" @ %d ", caller_bci()); 709 method()->print_short_name(st); 710 st->cr(); 711 712 for (int i = 0 ; i < _subtrees.length(); i++) { 713 _subtrees.at(i)->print_impl(st, indent + 2); 714 } 715 } 716 717 void InlineTree::print_value_on(outputStream* st) const { 718 print_impl(st, 2); 719 } 720 #endif