1 /* 2 * Copyright (c) 1998, 2013, 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 #ifndef PRODUCT 54 _count_inlines = 0; 55 _forced_inline = false; 56 #endif 57 if (_caller_jvms != NULL) { 58 // Keep a private copy of the caller_jvms: 59 _caller_jvms = new (C) JVMState(caller_jvms->method(), caller_tree->caller_jvms()); 60 _caller_jvms->set_bci(caller_jvms->bci()); 61 assert(!caller_jvms->should_reexecute(), "there should be no reexecute bytecode with inlining"); 62 } 63 assert(_caller_jvms->same_calls_as(caller_jvms), "consistent JVMS"); 64 assert((caller_tree == NULL ? 0 : caller_tree->stack_depth() + 1) == stack_depth(), "correct (redundant) depth parameter"); 65 assert(caller_bci == this->caller_bci(), "correct (redundant) bci parameter"); 66 // Update hierarchical counts, count_inline_bcs() and count_inlines() 67 InlineTree *caller = (InlineTree *)caller_tree; 68 for( ; caller != NULL; caller = ((InlineTree *)(caller->caller_tree())) ) { 69 caller->_count_inline_bcs += count_inline_bcs(); 70 NOT_PRODUCT(caller->_count_inlines++;) 71 } 72 } 73 74 /** 75 * Return true when EA is ON and a java constructor is called or 76 * a super constructor is called from an inlined java constructor. 77 * Also return true for boxing methods. 78 */ 79 static bool is_init_with_ea(ciMethod* callee_method, 80 ciMethod* caller_method, Compile* C) { 81 if (!C->do_escape_analysis() || !EliminateAllocations) { 82 return false; // EA is off 83 } 84 if (callee_method->is_initializer()) { 85 return true; // constuctor 86 } 87 if (caller_method->is_initializer() && 88 caller_method != C->method() && 89 caller_method->holder()->is_subclass_of(callee_method->holder())) { 90 return true; // super constructor is called from inlined constructor 91 } 92 if (C->eliminate_boxing() && callee_method->is_boxing_method()) { 93 return true; 94 } 95 return false; 96 } 97 98 /** 99 * Force inlining unboxing accessor. 100 */ 101 static bool is_unboxing_method(ciMethod* callee_method, Compile* C) { 102 return C->eliminate_boxing() && callee_method->is_unboxing_method(); 103 } 104 105 // positive filter: should callee be inlined? 106 bool InlineTree::should_inline(ciMethod* callee_method, ciMethod* caller_method, 107 int caller_bci, ciCallProfile& profile, 108 WarmCallInfo* wci_result) { 109 // Allows targeted inlining 110 if (callee_method->should_inline()) { 111 *wci_result = *(WarmCallInfo::always_hot()); 112 if (C->print_inlining() && Verbose) { 113 CompileTask::print_inline_indent(inline_level()); 114 tty->print_cr("Inlined method is hot: "); 115 } 116 set_msg("force inline by CompilerOracle"); 117 _forced_inline = true; 118 return true; 119 } 120 121 if (callee_method->force_inline()) { 122 set_msg("force inline by annotation"); 123 _forced_inline = true; 124 return true; 125 } 126 127 #ifndef PRODUCT 128 int inline_depth = inline_level()+1; 129 if (ciReplay::should_inline(C->replay_inline_data(), callee_method, caller_bci, inline_depth)) { 130 set_msg("force inline by ciReplay"); 131 _forced_inline = true; 132 return true; 133 } 134 #endif 135 136 int size = callee_method->code_size_for_inlining(); 137 138 // Check for too many throws (and not too huge) 139 if(callee_method->interpreter_throwout_count() > InlineThrowCount && 140 size < InlineThrowMaxSize ) { 141 wci_result->set_profit(wci_result->profit() * 100); 142 if (C->print_inlining() && Verbose) { 143 CompileTask::print_inline_indent(inline_level()); 144 tty->print_cr("Inlined method with many throws (throws=%d):", callee_method->interpreter_throwout_count()); 145 } 146 set_msg("many throws"); 147 return true; 148 } 149 150 int default_max_inline_size = C->max_inline_size(); 151 int inline_small_code_size = InlineSmallCode / 4; 152 int max_inline_size = default_max_inline_size; 153 154 int call_site_count = method()->scale_count(profile.count()); 155 int invoke_count = method()->interpreter_invocation_count(); 156 157 assert(invoke_count != 0, "require invocation count greater than zero"); 158 int freq = call_site_count / invoke_count; 159 160 // bump the max size if the call is frequent 161 if ((freq >= InlineFrequencyRatio) || 162 (call_site_count >= InlineFrequencyCount) || 163 is_unboxing_method(callee_method, C) || 164 is_init_with_ea(callee_method, caller_method, C)) { 165 166 max_inline_size = C->freq_inline_size(); 167 if (size <= max_inline_size && TraceFrequencyInlining) { 168 CompileTask::print_inline_indent(inline_level()); 169 tty->print_cr("Inlined frequent method (freq=%d count=%d):", freq, call_site_count); 170 CompileTask::print_inline_indent(inline_level()); 171 callee_method->print(); 172 tty->cr(); 173 } 174 } else { 175 // Not hot. Check for medium-sized pre-existing nmethod at cold sites. 176 if (callee_method->has_compiled_code() && 177 callee_method->instructions_size() > inline_small_code_size) { 178 set_msg("already compiled into a medium method"); 179 return false; 180 } 181 } 182 if (size > max_inline_size) { 183 if (max_inline_size > default_max_inline_size) { 184 set_msg("hot method too big"); 185 } else { 186 set_msg("too big"); 187 } 188 return false; 189 } 190 return true; 191 } 192 193 194 // negative filter: should callee NOT be inlined? 195 bool InlineTree::should_not_inline(ciMethod *callee_method, 196 ciMethod* caller_method, 197 JVMState* jvms, 198 WarmCallInfo* wci_result) { 199 200 const char* fail_msg = NULL; 201 202 // First check all inlining restrictions which are required for correctness 203 if ( callee_method->is_abstract()) { 204 fail_msg = "abstract method"; // // note: we allow ik->is_abstract() 205 } else if (!callee_method->holder()->is_initialized()) { 206 fail_msg = "method holder not initialized"; 207 } else if ( callee_method->is_native()) { 208 fail_msg = "native method"; 209 } else if ( callee_method->dont_inline()) { 210 fail_msg = "don't inline by annotation"; 211 } 212 213 // one more inlining restriction 214 if (fail_msg == NULL && callee_method->has_unloaded_classes_in_signature()) { 215 fail_msg = "unloaded signature classes"; 216 } 217 218 if (fail_msg != NULL) { 219 set_msg(fail_msg); 220 return true; 221 } 222 223 // ignore heuristic controls on inlining 224 if (callee_method->should_inline()) { 225 set_msg("force inline by CompilerOracle"); 226 return false; 227 } 228 229 if (callee_method->should_not_inline()) { 230 set_msg("disallowed by CompilerOracle"); 231 return true; 232 } 233 234 #ifndef PRODUCT 235 int caller_bci = jvms->bci(); 236 int inline_depth = inline_level()+1; 237 if (ciReplay::should_inline(C->replay_inline_data(), callee_method, caller_bci, inline_depth)) { 238 set_msg("force inline by ciReplay"); 239 return false; 240 } 241 242 if (ciReplay::should_not_inline(C->replay_inline_data(), callee_method, caller_bci, inline_depth)) { 243 set_msg("disallowed by ciReplay"); 244 return true; 245 } 246 247 if (ciReplay::should_not_inline(callee_method)) { 248 set_msg("disallowed by ciReplay"); 249 return true; 250 } 251 #endif 252 253 if (callee_method->force_inline()) { 254 set_msg("force inline by annotation"); 255 return false; 256 } 257 258 // Now perform checks which are heuristic 259 260 if (is_unboxing_method(callee_method, C)) { 261 // Inline unboxing methods. 262 return false; 263 } 264 265 if (callee_method->has_compiled_code() && 266 callee_method->instructions_size() > InlineSmallCode) { 267 set_msg("already compiled into a big method"); 268 return true; 269 } 270 271 // don't inline exception code unless the top method belongs to an 272 // exception class 273 if (caller_tree() != NULL && 274 callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { 275 const InlineTree *top = this; 276 while (top->caller_tree() != NULL) top = top->caller_tree(); 277 ciInstanceKlass* k = top->method()->holder(); 278 if (!k->is_subclass_of(C->env()->Throwable_klass())) { 279 set_msg("exception method"); 280 return true; 281 } 282 } 283 284 // use frequency-based objections only for non-trivial methods 285 if (callee_method->code_size() <= MaxTrivialSize) { 286 return false; 287 } 288 289 // don't use counts with -Xcomp or CTW 290 if (UseInterpreter && !CompileTheWorld) { 291 292 if (!callee_method->has_compiled_code() && 293 !callee_method->was_executed_more_than(0)) { 294 set_msg("never executed"); 295 return true; 296 } 297 298 if (is_init_with_ea(callee_method, caller_method, C)) { 299 // Escape Analysis: inline all executed constructors 300 return false; 301 } else if (!callee_method->was_executed_more_than(MIN2(MinInliningThreshold, 302 CompileThreshold >> 1))) { 303 set_msg("executed < MinInliningThreshold times"); 304 return true; 305 } 306 } 307 308 return false; 309 } 310 311 //-----------------------------try_to_inline----------------------------------- 312 // return true if ok 313 // Relocated from "InliningClosure::try_to_inline" 314 bool InlineTree::try_to_inline(ciMethod* callee_method, ciMethod* caller_method, 315 int caller_bci, JVMState* jvms, ciCallProfile& profile, 316 WarmCallInfo* wci_result, bool& should_delay) { 317 318 if (ClipInlining && (int)count_inline_bcs() >= DesiredMethodLimit) { 319 if (!callee_method->force_inline() || !IncrementalInline) { 320 set_msg("size > DesiredMethodLimit"); 321 return false; 322 } else if (!C->inlining_incrementally()) { 323 should_delay = true; 324 } 325 } 326 327 _forced_inline = false; // Reset 328 if (!should_inline(callee_method, caller_method, caller_bci, profile, 329 wci_result)) { 330 return false; 331 } 332 if (should_not_inline(callee_method, caller_method, jvms, wci_result)) { 333 return false; 334 } 335 336 if (InlineAccessors && callee_method->is_accessor()) { 337 // accessor methods are not subject to any of the following limits. 338 set_msg("accessor"); 339 return true; 340 } 341 342 // suppress a few checks for accessors and trivial methods 343 if (callee_method->code_size() > MaxTrivialSize) { 344 345 // don't inline into giant methods 346 if (C->over_inlining_cutoff()) { 347 if ((!callee_method->force_inline() && !caller_method->is_compiled_lambda_form()) 348 || !IncrementalInline) { 349 set_msg("NodeCountInliningCutoff"); 350 return false; 351 } else { 352 should_delay = true; 353 } 354 } 355 356 if ((!UseInterpreter || CompileTheWorld) && 357 is_init_with_ea(callee_method, caller_method, C)) { 358 // Escape Analysis stress testing when running Xcomp or CTW: 359 // inline constructors even if they are not reached. 360 } else if (forced_inline()) { 361 // Inlining was forced by CompilerOracle, ciReplay or annotation 362 } else if (profile.count() == 0) { 363 // don't inline unreached call sites 364 set_msg("call site not reached"); 365 return false; 366 } 367 } 368 369 if (!C->do_inlining() && InlineAccessors) { 370 set_msg("not an accessor"); 371 return false; 372 } 373 374 // Limit inlining depth in case inlining is forced or 375 // _max_inline_level was increased to compensate for lambda forms. 376 if (inline_level() > MaxForceInlineLevel) { 377 set_msg("MaxForceInlineLevel"); 378 return false; 379 } 380 if (inline_level() > _max_inline_level) { 381 if (!callee_method->force_inline() || !IncrementalInline) { 382 set_msg("inlining too deep"); 383 return false; 384 } else if (!C->inlining_incrementally()) { 385 should_delay = true; 386 } 387 } 388 389 // detect direct and indirect recursive inlining 390 { 391 // count the current method and the callee 392 const bool is_compiled_lambda_form = callee_method->is_compiled_lambda_form(); 393 int inline_level = 0; 394 if (!is_compiled_lambda_form) { 395 if (method() == callee_method) { 396 inline_level++; 397 } 398 } 399 // count callers of current method and callee 400 Node* callee_argument0 = is_compiled_lambda_form ? jvms->map()->argument(jvms, 0)->uncast() : NULL; 401 for (JVMState* j = jvms->caller(); j != NULL && j->has_method(); j = j->caller()) { 402 if (j->method() == callee_method) { 403 if (is_compiled_lambda_form) { 404 // Since compiled lambda forms are heavily reused we allow recursive inlining. If it is truly 405 // a recursion (using the same "receiver") we limit inlining otherwise we can easily blow the 406 // compiler stack. 407 Node* caller_argument0 = j->map()->argument(j, 0)->uncast(); 408 if (caller_argument0 == callee_argument0) { 409 inline_level++; 410 } 411 } else { 412 inline_level++; 413 } 414 } 415 } 416 if (inline_level > MaxRecursiveInlineLevel) { 417 set_msg("recursive inlining is too deep"); 418 return false; 419 } 420 } 421 422 int size = callee_method->code_size_for_inlining(); 423 424 if (ClipInlining && (int)count_inline_bcs() + size >= DesiredMethodLimit) { 425 if (!callee_method->force_inline() || !IncrementalInline) { 426 set_msg("size > DesiredMethodLimit"); 427 return false; 428 } else if (!C->inlining_incrementally()) { 429 should_delay = true; 430 } 431 } 432 433 // ok, inline this method 434 return true; 435 } 436 437 //------------------------------pass_initial_checks---------------------------- 438 bool pass_initial_checks(ciMethod* caller_method, int caller_bci, ciMethod* callee_method) { 439 ciInstanceKlass *callee_holder = callee_method ? callee_method->holder() : NULL; 440 // Check if a callee_method was suggested 441 if( callee_method == NULL ) return false; 442 // Check if klass of callee_method is loaded 443 if( !callee_holder->is_loaded() ) return false; 444 if( !callee_holder->is_initialized() ) return false; 445 if( !UseInterpreter || CompileTheWorld /* running Xcomp or CTW */ ) { 446 // Checks that constant pool's call site has been visited 447 // stricter than callee_holder->is_initialized() 448 ciBytecodeStream iter(caller_method); 449 iter.force_bci(caller_bci); 450 Bytecodes::Code call_bc = iter.cur_bc(); 451 // An invokedynamic instruction does not have a klass. 452 if (call_bc != Bytecodes::_invokedynamic) { 453 int index = iter.get_index_u2_cpcache(); 454 if (!caller_method->is_klass_loaded(index, true)) { 455 return false; 456 } 457 // Try to do constant pool resolution if running Xcomp 458 if( !caller_method->check_call(index, call_bc == Bytecodes::_invokestatic) ) { 459 return false; 460 } 461 } 462 } 463 // We will attempt to see if a class/field/etc got properly loaded. If it 464 // did not, it may attempt to throw an exception during our probing. Catch 465 // and ignore such exceptions and do not attempt to compile the method. 466 if( callee_method->should_exclude() ) return false; 467 468 return true; 469 } 470 471 //------------------------------check_can_parse-------------------------------- 472 const char* InlineTree::check_can_parse(ciMethod* callee) { 473 // Certain methods cannot be parsed at all: 474 if ( callee->is_native()) return "native method"; 475 if ( callee->is_abstract()) return "abstract method"; 476 if (!callee->can_be_compiled()) return "not compilable (disabled)"; 477 if (!callee->has_balanced_monitors()) return "not compilable (unbalanced monitors)"; 478 if ( callee->get_flow_analysis()->failing()) return "not compilable (flow analysis failed)"; 479 return NULL; 480 } 481 482 //------------------------------print_inlining--------------------------------- 483 void InlineTree::print_inlining(ciMethod* callee_method, int caller_bci, 484 bool success) const { 485 const char* inline_msg = msg(); 486 assert(inline_msg != NULL, "just checking"); 487 if (C->log() != NULL) { 488 if (success) { 489 C->log()->inline_success(inline_msg); 490 } else { 491 C->log()->inline_fail(inline_msg); 492 } 493 } 494 if (C->print_inlining()) { 495 C->print_inlining(callee_method, inline_level(), caller_bci, inline_msg); 496 if (callee_method == NULL) tty->print(" callee not monotonic or profiled"); 497 if (Verbose && callee_method) { 498 const InlineTree *top = this; 499 while( top->caller_tree() != NULL ) { top = top->caller_tree(); } 500 //tty->print(" bcs: %d+%d invoked: %d", top->count_inline_bcs(), callee_method->code_size(), callee_method->interpreter_invocation_count()); 501 } 502 } 503 } 504 505 //------------------------------ok_to_inline----------------------------------- 506 WarmCallInfo* InlineTree::ok_to_inline(ciMethod* callee_method, JVMState* jvms, ciCallProfile& profile, WarmCallInfo* initial_wci, bool& should_delay) { 507 assert(callee_method != NULL, "caller checks for optimized virtual!"); 508 assert(!should_delay, "should be initialized to false"); 509 #ifdef ASSERT 510 // Make sure the incoming jvms has the same information content as me. 511 // This means that we can eventually make this whole class AllStatic. 512 if (jvms->caller() == NULL) { 513 assert(_caller_jvms == NULL, "redundant instance state"); 514 } else { 515 assert(_caller_jvms->same_calls_as(jvms->caller()), "redundant instance state"); 516 } 517 assert(_method == jvms->method(), "redundant instance state"); 518 #endif 519 int caller_bci = jvms->bci(); 520 ciMethod* caller_method = jvms->method(); 521 522 // Do some initial checks. 523 if (!pass_initial_checks(caller_method, caller_bci, callee_method)) { 524 set_msg("failed initial checks"); 525 print_inlining(callee_method, caller_bci, false /* !success */); 526 return NULL; 527 } 528 529 // Do some parse checks. 530 set_msg(check_can_parse(callee_method)); 531 if (msg() != NULL) { 532 print_inlining(callee_method, caller_bci, false /* !success */); 533 return NULL; 534 } 535 536 // Check if inlining policy says no. 537 WarmCallInfo wci = *(initial_wci); 538 bool success = try_to_inline(callee_method, caller_method, caller_bci, 539 jvms, profile, &wci, should_delay); 540 541 #ifndef PRODUCT 542 if (InlineWarmCalls && (PrintOpto || C->print_inlining())) { 543 bool cold = wci.is_cold(); 544 bool hot = !cold && wci.is_hot(); 545 bool old_cold = !success; 546 if (old_cold != cold || (Verbose || WizardMode)) { 547 if (msg() == NULL) { 548 set_msg("OK"); 549 } 550 tty->print(" OldInlining= %4s : %s\n WCI=", 551 old_cold ? "cold" : "hot", msg()); 552 wci.print(); 553 } 554 } 555 #endif 556 if (success) { 557 wci = *(WarmCallInfo::always_hot()); 558 } else { 559 wci = *(WarmCallInfo::always_cold()); 560 } 561 562 if (!InlineWarmCalls) { 563 if (!wci.is_cold() && !wci.is_hot()) { 564 // Do not inline the warm calls. 565 wci = *(WarmCallInfo::always_cold()); 566 } 567 } 568 569 if (!wci.is_cold()) { 570 // Inline! 571 if (msg() == NULL) { 572 set_msg("inline (hot)"); 573 } 574 print_inlining(callee_method, caller_bci, true /* success */); 575 build_inline_tree_for_callee(callee_method, jvms, caller_bci); 576 if (InlineWarmCalls && !wci.is_hot()) 577 return new (C) WarmCallInfo(wci); // copy to heap 578 return WarmCallInfo::always_hot(); 579 } 580 581 // Do not inline 582 if (msg() == NULL) { 583 set_msg("too cold to inline"); 584 } 585 print_inlining(callee_method, caller_bci, false /* !success */ ); 586 return NULL; 587 } 588 589 //------------------------------compute_callee_frequency----------------------- 590 float InlineTree::compute_callee_frequency( int caller_bci ) const { 591 int count = method()->interpreter_call_site_count(caller_bci); 592 int invcnt = method()->interpreter_invocation_count(); 593 float freq = (float)count/(float)invcnt; 594 // Call-site count / interpreter invocation count, scaled recursively. 595 // Always between 0.0 and 1.0. Represents the percentage of the method's 596 // total execution time used at this call site. 597 598 return freq; 599 } 600 601 //------------------------------build_inline_tree_for_callee------------------- 602 InlineTree *InlineTree::build_inline_tree_for_callee( ciMethod* callee_method, JVMState* caller_jvms, int caller_bci) { 603 float recur_frequency = _site_invoke_ratio * compute_callee_frequency(caller_bci); 604 // Attempt inlining. 605 InlineTree* old_ilt = callee_at(caller_bci, callee_method); 606 if (old_ilt != NULL) { 607 return old_ilt; 608 } 609 int max_inline_level_adjust = 0; 610 if (caller_jvms->method() != NULL) { 611 if (caller_jvms->method()->is_compiled_lambda_form()) { 612 max_inline_level_adjust += 1; // don't count actions in MH or indy adapter frames 613 } else if (callee_method->is_method_handle_intrinsic() || 614 callee_method->is_compiled_lambda_form()) { 615 max_inline_level_adjust += 1; // don't count method handle calls from java.lang.invoke implementation 616 } 617 if (max_inline_level_adjust != 0 && C->print_inlining() && (Verbose || WizardMode)) { 618 CompileTask::print_inline_indent(inline_level()); 619 tty->print_cr(" \\-> discounting inline depth"); 620 } 621 if (max_inline_level_adjust != 0 && C->log()) { 622 int id1 = C->log()->identify(caller_jvms->method()); 623 int id2 = C->log()->identify(callee_method); 624 C->log()->elem("inline_level_discount caller='%d' callee='%d'", id1, id2); 625 } 626 } 627 InlineTree* ilt = new InlineTree(C, this, callee_method, caller_jvms, caller_bci, recur_frequency, _max_inline_level + max_inline_level_adjust); 628 _subtrees.append(ilt); 629 630 NOT_PRODUCT( _count_inlines += 1; ) 631 632 return ilt; 633 } 634 635 636 //---------------------------------------callee_at----------------------------- 637 InlineTree *InlineTree::callee_at(int bci, ciMethod* callee) const { 638 for (int i = 0; i < _subtrees.length(); i++) { 639 InlineTree* sub = _subtrees.at(i); 640 if (sub->caller_bci() == bci && callee == sub->method()) { 641 return sub; 642 } 643 } 644 return NULL; 645 } 646 647 648 //------------------------------build_inline_tree_root------------------------- 649 InlineTree *InlineTree::build_inline_tree_root() { 650 Compile* C = Compile::current(); 651 652 // Root of inline tree 653 InlineTree* ilt = new InlineTree(C, NULL, C->method(), NULL, -1, 1.0F, MaxInlineLevel); 654 655 return ilt; 656 } 657 658 659 //-------------------------find_subtree_from_root----------------------------- 660 // Given a jvms, which determines a call chain from the root method, 661 // find the corresponding inline tree. 662 // Note: This method will be removed or replaced as InlineTree goes away. 663 InlineTree* InlineTree::find_subtree_from_root(InlineTree* root, JVMState* jvms, ciMethod* callee) { 664 InlineTree* iltp = root; 665 uint depth = jvms && jvms->has_method() ? jvms->depth() : 0; 666 for (uint d = 1; d <= depth; d++) { 667 JVMState* jvmsp = jvms->of_depth(d); 668 // Select the corresponding subtree for this bci. 669 assert(jvmsp->method() == iltp->method(), "tree still in sync"); 670 ciMethod* d_callee = (d == depth) ? callee : jvms->of_depth(d+1)->method(); 671 InlineTree* sub = iltp->callee_at(jvmsp->bci(), d_callee); 672 if (sub == NULL) { 673 if (d == depth) { 674 sub = iltp->build_inline_tree_for_callee(d_callee, jvmsp, jvmsp->bci()); 675 } 676 guarantee(sub != NULL, "should be a sub-ilt here"); 677 return sub; 678 } 679 iltp = sub; 680 } 681 return iltp; 682 } 683 684 // Count number of nodes in this subtree 685 int InlineTree::count() const { 686 int result = 1; 687 for (int i = 0 ; i < _subtrees.length(); i++) { 688 result += _subtrees.at(i)->count(); 689 } 690 return result; 691 } 692 693 void InlineTree::dump_replay_data(outputStream* out) { 694 out->print(" %d %d ", inline_level(), caller_bci()); 695 method()->dump_name_as_ascii(out); 696 for (int i = 0 ; i < _subtrees.length(); i++) { 697 _subtrees.at(i)->dump_replay_data(out); 698 } 699 } 700 701 702 #ifndef PRODUCT 703 void InlineTree::print_impl(outputStream* st, int indent) const { 704 for (int i = 0; i < indent; i++) st->print(" "); 705 st->print(" @ %d", caller_bci()); 706 method()->print_short_name(st); 707 st->cr(); 708 709 for (int i = 0 ; i < _subtrees.length(); i++) { 710 _subtrees.at(i)->print_impl(st, indent + 2); 711 } 712 } 713 714 void InlineTree::print_value_on(outputStream* st) const { 715 print_impl(st, 2); 716 } 717 #endif