1 /*
2 * Copyright (c) 1998, 2025, 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 "ci/ciReplay.hpp"
26 #include "classfile/vmSymbols.hpp"
27 #include "compiler/compilationPolicy.hpp"
28 #include "compiler/compileBroker.hpp"
29 #include "compiler/compilerEvent.hpp"
30 #include "compiler/compileLog.hpp"
31 #include "interpreter/linkResolver.hpp"
32 #include "jfr/jfrEvents.hpp"
33 #include "oops/objArrayKlass.hpp"
34 #include "opto/callGenerator.hpp"
35 #include "opto/parse.hpp"
36 #include "runtime/handles.inline.hpp"
37 #include "utilities/events.hpp"
38
39 //=============================================================================
40 //------------------------------InlineTree-------------------------------------
41 InlineTree::InlineTree(Compile* c,
42 const InlineTree *caller_tree, ciMethod* callee,
43 JVMState* caller_jvms, int caller_bci,
44 int max_inline_level) :
45 C(c),
46 _caller_jvms(nullptr),
47 _method(callee),
48 _late_inline(false),
49 _caller_tree((InlineTree*) caller_tree),
50 _count_inline_bcs(method()->code_size_for_inlining()),
51 _max_inline_level(max_inline_level),
52 _subtrees(c->comp_arena(), 2, 0, nullptr),
53 _msg(nullptr)
54 {
55 #ifndef PRODUCT
56 _count_inlines = 0;
57 _forced_inline = false;
58 #endif
59 if (caller_jvms != nullptr) {
60 // Keep a private copy of the caller_jvms:
61 _caller_jvms = new (C) JVMState(caller_jvms->method(), caller_tree->caller_jvms());
62 _caller_jvms->set_bci(caller_jvms->bci());
63 assert(!caller_jvms->should_reexecute(), "there should be no reexecute bytecode with inlining");
64 assert(_caller_jvms->same_calls_as(caller_jvms), "consistent JVMS");
65 }
66 assert((caller_tree == nullptr ? 0 : caller_tree->stack_depth() + 1) == stack_depth(), "correct (redundant) depth parameter");
67 assert(caller_bci == this->caller_bci(), "correct (redundant) bci parameter");
68 // Update hierarchical counts, count_inline_bcs() and count_inlines()
69 InlineTree *caller = (InlineTree *)caller_tree;
70 for( ; caller != nullptr; caller = ((InlineTree *)(caller->caller_tree())) ) {
71 caller->_count_inline_bcs += count_inline_bcs();
72 NOT_PRODUCT(caller->_count_inlines++;)
73 }
74 }
75
76 /**
77 * Return true when EA is ON and a java constructor is called or
78 * a super constructor is called from an inlined java constructor.
79 * Also return true for boxing methods.
80 * Also return true for methods returning Iterator (including Iterable::iterator())
81 * that is essential for forall-loops performance.
82 */
83 static bool is_init_with_ea(ciMethod* callee_method,
84 ciMethod* caller_method, Compile* C) {
85 if (!C->do_escape_analysis() || !EliminateAllocations) {
86 return false; // EA is off
87 }
88 if (callee_method->is_object_constructor()) {
89 return true; // constructor
90 }
91 if ((caller_method->is_object_constructor() || caller_method->is_class_initializer()) &&
92 caller_method != C->method() &&
93 caller_method->holder()->is_subclass_of(callee_method->holder())) {
94 return true; // super constructor is called from inlined constructor
95 }
96 if (C->eliminate_boxing() && callee_method->is_boxing_method()) {
97 return true;
98 }
99 ciType *retType = callee_method->signature()->return_type();
100 ciKlass *iter = C->env()->Iterator_klass();
101 if(retType->is_loaded() && iter->is_loaded() && retType->is_subtype_of(iter)) {
102 return true;
103 }
104 return false;
105 }
106
107 /**
108 * Force inlining unboxing accessor.
109 */
110 static bool is_unboxing_method(ciMethod* callee_method, Compile* C) {
111 return C->eliminate_boxing() && callee_method->is_unboxing_method();
112 }
113
114 // positive filter: should callee be inlined?
115 bool InlineTree::should_inline(ciMethod* callee_method, ciMethod* caller_method,
116 JVMState* caller_jvms, bool& should_delay, ciCallProfile& profile) {
117 int caller_bci = caller_jvms->bci();
118 // Allows targeted inlining
119 if (C->directive()->should_inline(callee_method)) {
120 set_msg("force inline by CompileCommand");
121 _forced_inline = true;
122 return true;
123 }
124
125 if (callee_method->force_inline()) {
126 set_msg("force inline by annotation");
127 _forced_inline = true;
128 return true;
129 }
130
131 int inline_depth = inline_level() + 1;
132 if (ciReplay::should_inline(C->replay_inline_data(), callee_method, caller_bci, inline_depth, should_delay)) {
133 if (should_delay) {
134 set_msg("force (incremental) inline by ciReplay");
135 } else {
136 set_msg("force inline by ciReplay");
137 }
138 _forced_inline = true;
139 return true;
140 }
141
142 int size = callee_method->code_size_for_inlining();
143
144 // Check for too many throws (and not too huge)
145 if(callee_method->interpreter_throwout_count() > InlineThrowCount &&
146 size < InlineThrowMaxSize ) {
147 if (Verbose) {
148 outputStream* stream = C->inline_printer()->record(callee_method, caller_jvms, InliningResult::SUCCESS);
149 stream->print("Inlined method with many throws (throws=%d):", callee_method->interpreter_throwout_count());
150 }
151 set_msg("many throws");
152 return true;
153 }
154
155 int default_max_inline_size = C->max_inline_size();
156 int inline_small_code_size = InlineSmallCode / 4;
157 int max_inline_size = default_max_inline_size;
158
159 int call_site_count = caller_method->scale_count(profile.count());
160 int invoke_count = caller_method->interpreter_invocation_count();
161
162 assert(invoke_count != 0, "require invocation count greater than zero");
163 double freq = (double)call_site_count / (double)invoke_count;
164
165 // bump the max size if the call is frequent
166 if ((freq >= InlineFrequencyRatio) ||
167 is_unboxing_method(callee_method, C) ||
168 is_init_with_ea(callee_method, caller_method, C)) {
169
170 max_inline_size = C->freq_inline_size();
171 if (size <= max_inline_size && TraceFrequencyInlining) {
172 outputStream* stream = C->inline_printer()->record(callee_method, caller_jvms, InliningResult::SUCCESS);
173 stream->print("Inlined frequent method (freq=%lf):", freq);
174 }
175 } else {
176 // Not hot. Check for medium-sized pre-existing nmethod at cold sites.
177 if (callee_method->has_compiled_code() &&
178 callee_method->inline_instructions_size() > inline_small_code_size) {
179 set_msg("already compiled into a medium method");
180 return false;
181 }
182 }
183 if (size > max_inline_size) {
184 if (max_inline_size > default_max_inline_size) {
185 set_msg("hot method too big");
186 } else {
187 set_msg("too big");
188 }
189 return false;
190 }
191 return true;
192 }
193
194
195 // negative filter: should callee NOT be inlined?
196 bool InlineTree::should_not_inline(ciMethod* callee_method, ciMethod* caller_method,
197 int caller_bci, bool& should_delay, ciCallProfile& profile) {
198 const char* fail_msg = nullptr;
199
200 // First check all inlining restrictions which are required for correctness
201 if (callee_method->is_abstract()) {
202 fail_msg = "abstract method"; // // note: we allow ik->is_abstract()
203 } else if (!callee_method->holder()->is_initialized() &&
204 // access allowed in the context of static initializer
205 C->needs_clinit_barrier(callee_method->holder(), caller_method)) {
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 // Don't inline a method that changes Thread.currentThread() except
214 // into another method that is annotated @ChangesCurrentThread.
215 if (callee_method->changes_current_thread()
216 && ! C->method()->changes_current_thread()) {
217 fail_msg = "method changes current thread";
218 }
219
220 // one more inlining restriction
221 if (fail_msg == nullptr && callee_method->has_unloaded_classes_in_signature()) {
222 fail_msg = "unloaded signature classes";
223 }
224
225 if (fail_msg != nullptr) {
226 set_msg(fail_msg);
227 return true;
228 }
229
230 // ignore heuristic controls on inlining
231 if (C->directive()->should_inline(callee_method)) {
232 set_msg("force inline by CompileCommand");
233 return false;
234 }
235
236 if (C->directive()->should_not_inline(callee_method)) {
237 set_msg("disallowed by CompileCommand");
238 return true;
239 }
240
241 int inline_depth = inline_level() + 1;
242 if (ciReplay::should_inline(C->replay_inline_data(), callee_method, caller_bci, inline_depth, should_delay)) {
243 if (should_delay) {
244 set_msg("force (incremental) inline by ciReplay");
245 } else {
246 set_msg("force inline by ciReplay");
247 }
248 return false;
249 }
250
251 if (ciReplay::should_not_inline(C->replay_inline_data(), callee_method, caller_bci, inline_depth)) {
252 set_msg("disallowed by ciReplay");
253 return true;
254 }
255
256 if (ciReplay::should_not_inline(callee_method)) {
257 set_msg("disallowed by ciReplay");
258 return true;
259 }
260
261 if (callee_method->force_inline()) {
262 set_msg("force inline by annotation");
263 return false;
264 }
265
266 // Now perform checks which are heuristic
267
268 if (is_unboxing_method(callee_method, C)) {
269 // Inline unboxing methods.
270 return false;
271 }
272
273 if (callee_method->has_compiled_code() &&
274 callee_method->inline_instructions_size() > InlineSmallCode) {
275 set_msg("already compiled into a big method");
276 return true;
277 }
278
279 // don't inline exception code unless the top method belongs to an
280 // exception class
281 if (caller_tree() != nullptr &&
282 callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) {
283 const InlineTree *top = this;
284 while (top->caller_tree() != nullptr) top = top->caller_tree();
285 ciInstanceKlass* k = top->method()->holder();
286 if (!k->is_subclass_of(C->env()->Throwable_klass())) {
287 set_msg("exception method");
288 return true;
289 }
290 }
291
292 // use frequency-based objections only for non-trivial methods
293 if (callee_method->code_size() <= MaxTrivialSize) {
294 return false;
295 }
296
297 // don't use counts with -Xcomp
298 if (UseInterpreter) {
299 if (!callee_method->has_compiled_code() &&
300 !callee_method->was_executed_more_than(0)) {
301 set_msg("never executed");
302 return true;
303 }
304
305 if (is_init_with_ea(callee_method, caller_method, C)) {
306 // Escape Analysis: inline all executed constructors
307 return false;
308 }
309
310 if (MinInlineFrequencyRatio > 0) {
311 int call_site_count = caller_method->scale_count(profile.count());
312 int invoke_count = caller_method->interpreter_invocation_count();
313 assert(invoke_count != 0, "require invocation count greater than zero");
314 double freq = (double)call_site_count / (double)invoke_count;
315 // avoid division by 0, set divisor to at least 1
316 int cp_min_inv = MAX2(1, CompilationPolicy::min_invocations());
317 double min_freq = MAX2(MinInlineFrequencyRatio, 1.0 / cp_min_inv);
318
319 if (freq < min_freq) {
320 set_msg("low call site frequency");
321 return true;
322 }
323 }
324 }
325
326 return false;
327 }
328
329 bool InlineTree::is_not_reached(ciMethod* callee_method, ciMethod* caller_method, int caller_bci, ciCallProfile& profile) {
330 if (!UseInterpreter) {
331 return false; // -Xcomp
332 }
333 if (profile.count() > 0) {
334 return false; // reachable according to profile
335 }
336 if (!callee_method->was_executed_more_than(0)) {
337 return true; // callee was never executed
338 }
339 if (caller_method->is_not_reached(caller_bci)) {
340 return true; // call site not resolved
341 }
342 if (profile.count() == -1) {
343 return false; // immature profile; optimistically treat as reached
344 }
345 assert(profile.count() == 0, "sanity");
346
347 // Profile info is scarce.
348 // Try to guess: check if the call site belongs to a start block.
349 // Call sites in a start block should be reachable if no exception is thrown earlier.
350 ciMethodBlocks* caller_blocks = caller_method->get_method_blocks();
351 bool is_start_block = caller_blocks->block_containing(caller_bci)->start_bci() == 0;
352 if (is_start_block) {
353 return false; // treat the call reached as part of start block
354 }
355 return true; // give up and treat the call site as not reached
356 }
357
358 //-----------------------------try_to_inline-----------------------------------
359 // return true if ok
360 // Relocated from "InliningClosure::try_to_inline"
361 bool InlineTree::try_to_inline(ciMethod* callee_method, ciMethod* caller_method,
362 int caller_bci, JVMState* jvms, ciCallProfile& profile,
363 bool& should_delay) {
364
365 if (ClipInlining && (int)count_inline_bcs() >= DesiredMethodLimit) {
366 if (!callee_method->force_inline() || !IncrementalInline) {
367 set_msg("size > DesiredMethodLimit");
368 return false;
369 } else if (!C->inlining_incrementally()) {
370 should_delay = true;
371 }
372 }
373
374 _forced_inline = false; // Reset
375
376 // 'should_delay' can be overridden during replay compilation
377 if (!should_inline(callee_method, caller_method, jvms, should_delay, profile)) {
378 return false;
379 }
380 // 'should_delay' can be overridden during replay compilation
381 if (should_not_inline(callee_method, caller_method, caller_bci, should_delay, profile)) {
382 return false;
383 }
384
385 if (InlineAccessors && callee_method->is_accessor()) {
386 // accessor methods are not subject to any of the following limits.
387 set_msg("accessor");
388 return true;
389 }
390
391 // suppress a few checks for accessors and trivial methods
392 if (callee_method->code_size() > MaxTrivialSize) {
393
394 // don't inline into giant methods
395 if (C->over_inlining_cutoff()) {
396 if ((!callee_method->force_inline() && !caller_method->is_compiled_lambda_form())
397 || !IncrementalInline) {
398 set_msg("NodeCountInliningCutoff");
399 return false;
400 } else {
401 should_delay = true;
402 }
403 }
404
405 if (!UseInterpreter &&
406 is_init_with_ea(callee_method, caller_method, C)) {
407 // Escape Analysis stress testing when running Xcomp:
408 // inline constructors even if they are not reached.
409 } else if (forced_inline()) {
410 // Inlining was forced by CompilerOracle, ciReplay or annotation
411 } else if (is_not_reached(callee_method, caller_method, caller_bci, profile)) {
412 // don't inline unreached call sites
413 set_msg("call site not reached");
414 return false;
415 }
416 }
417
418 if (!C->do_inlining() && InlineAccessors) {
419 set_msg("not an accessor");
420 return false;
421 }
422
423 // Limit inlining depth in case inlining is forced or
424 // _max_inline_level was increased to compensate for lambda forms.
425 if (inline_level() > MaxForceInlineLevel) {
426 set_msg("MaxForceInlineLevel");
427 return false;
428 }
429 if (inline_level() > _max_inline_level) {
430 if (!callee_method->force_inline() || !IncrementalInline) {
431 set_msg("inlining too deep");
432 return false;
433 } else if (!C->inlining_incrementally()) {
434 should_delay = true;
435 }
436 }
437
438 // detect direct and indirect recursive inlining
439 {
440 // count the current method and the callee
441 const bool is_compiled_lambda_form = callee_method->is_compiled_lambda_form();
442 int inline_level = 0;
443 if (!is_compiled_lambda_form) {
444 if (method() == callee_method) {
445 inline_level++;
446 }
447 }
448 // count callers of current method and callee
449 Node* callee_argument0 = is_compiled_lambda_form ? jvms->map()->argument(jvms, 0)->uncast() : nullptr;
450 for (JVMState* j = jvms->caller(); j != nullptr && j->has_method(); j = j->caller()) {
451 if (j->method() == callee_method) {
452 if (is_compiled_lambda_form) {
453 // Since compiled lambda forms are heavily reused we allow recursive inlining. If it is truly
454 // a recursion (using the same "receiver") we limit inlining otherwise we can easily blow the
455 // compiler stack.
456 Node* caller_argument0 = j->map()->argument(j, 0)->uncast();
457 if (caller_argument0 == callee_argument0) {
458 inline_level++;
459 }
460 } else {
461 inline_level++;
462 }
463 }
464 }
465 if (inline_level > MaxRecursiveInlineLevel) {
466 set_msg("recursive inlining is too deep");
467 return false;
468 }
469 }
470
471 int size = callee_method->code_size_for_inlining();
472
473 if (ClipInlining && (int)count_inline_bcs() + size >= DesiredMethodLimit) {
474 if (!callee_method->force_inline() || !IncrementalInline) {
475 set_msg("size > DesiredMethodLimit");
476 return false;
477 } else if (!C->inlining_incrementally()) {
478 should_delay = true;
479 }
480 }
481
482 // ok, inline this method
483 return true;
484 }
485
486 //------------------------------pass_initial_checks----------------------------
487 bool InlineTree::pass_initial_checks(ciMethod* caller_method, int caller_bci, ciMethod* callee_method) {
488 // Check if a callee_method was suggested
489 if (callee_method == nullptr) {
490 return false;
491 }
492 ciInstanceKlass *callee_holder = callee_method->holder();
493 // Check if klass of callee_method is loaded
494 if (!callee_holder->is_loaded()) {
495 return false;
496 }
497 if (!callee_holder->is_initialized() &&
498 // access allowed in the context of static initializer
499 C->needs_clinit_barrier(callee_holder, caller_method)) {
500 return false;
501 }
502 if( !UseInterpreter ) /* running Xcomp */ {
503 // Checks that constant pool's call site has been visited
504 // stricter than callee_holder->is_initialized()
505 ciBytecodeStream iter(caller_method);
506 iter.force_bci(caller_bci);
507 Bytecodes::Code call_bc = iter.cur_bc();
508 // An invokedynamic instruction does not have a klass.
509 if (call_bc != Bytecodes::_invokedynamic) {
510 int index = iter.get_index_u2();
511 if (!caller_method->is_klass_loaded(index, call_bc, true)) {
512 return false;
513 }
514 // Try to do constant pool resolution if running Xcomp
515 if( !caller_method->check_call(index, call_bc == Bytecodes::_invokestatic) ) {
516 return false;
517 }
518 }
519 }
520 return true;
521 }
522
523 //------------------------------check_can_parse--------------------------------
524 const char* InlineTree::check_can_parse(ciMethod* callee) {
525 // Certain methods cannot be parsed at all:
526 if ( callee->is_native()) return "native method";
527 if ( callee->is_abstract()) return "abstract method";
528 if (!callee->has_balanced_monitors()) return "not compilable (unbalanced monitors)";
529 if ( callee->get_flow_analysis()->failing()) return "not compilable (flow analysis failed)";
530 if (!callee->can_be_parsed()) return "cannot be parsed";
531 return nullptr;
532 }
533
534 //------------------------------print_inlining---------------------------------
535 void InlineTree::print_inlining(ciMethod* callee_method, JVMState* jvm, bool success) const {
536 int caller_bci = jvm->bci();
537 ciMethod* caller_method = jvm->method();
538 const char* inline_msg = msg();
539 assert(inline_msg != nullptr, "just checking");
540 if (C->log() != nullptr) {
541 if (success) {
542 C->log()->inline_success(inline_msg);
543 } else {
544 C->log()->inline_fail(inline_msg);
545 }
546 }
547 CompileTask::print_inlining_ul(callee_method, inline_level(), caller_bci, inlining_result_of(success), inline_msg);
548 C->inline_printer()->record(callee_method, jvm, inlining_result_of(success), inline_msg);
549 EventCompilerInlining event;
550 if (event.should_commit()) {
551 guarantee(callee_method != nullptr, "would crash in CompilerEvent::InlineEvent::post");
552 CompilerEvent::InlineEvent::post(event, C->compile_id(), caller_method->get_Method(), callee_method, success, inline_msg, caller_bci);
553 }
554 }
555
556 //------------------------------ok_to_inline-----------------------------------
557 bool InlineTree::ok_to_inline(ciMethod* callee_method, JVMState* jvms, ciCallProfile& profile,
558 bool& should_delay) {
559 #ifdef ASSERT
560 assert(callee_method != nullptr, "caller checks for optimized virtual!");
561 // Make sure the incoming jvms has the same information content as me.
562 // This means that we can eventually make this whole class AllStatic.
563 if (jvms->caller() == nullptr) {
564 assert(_caller_jvms == nullptr, "redundant instance state");
565 } else {
566 assert(_caller_jvms->same_calls_as(jvms->caller()), "redundant instance state");
567 }
568 assert(_method == jvms->method(), "redundant instance state");
569 #endif
570 int caller_bci = jvms->bci();
571 ciMethod* caller_method = jvms->method();
572
573 // Do some initial checks.
574 if (!pass_initial_checks(caller_method, caller_bci, callee_method)) {
575 set_msg("failed initial checks");
576 print_inlining(callee_method, jvms, false /* !success */);
577 return false;
578 }
579
580 // Do some parse checks.
581 set_msg(check_can_parse(callee_method));
582 if (msg() != nullptr) {
583 print_inlining(callee_method, jvms, false /* !success */);
584 return false;
585 }
586
587 // Check if inlining policy says no.
588 bool success = try_to_inline(callee_method, caller_method, caller_bci, jvms, profile,
589 should_delay); // out
590 if (success) {
591 // Inline!
592 if (msg() == nullptr) {
593 set_msg("inline (hot)");
594 }
595 print_inlining(callee_method, jvms, true /* success */);
596 InlineTree* callee_tree = build_inline_tree_for_callee(callee_method, jvms, caller_bci);
597 if (should_delay) {
598 // Record late inlining decision in order to dump it for compiler replay
599 callee_tree->set_late_inline();
600 }
601 return true;
602 } else {
603 // Do not inline
604 if (msg() == nullptr) {
605 set_msg("too cold to inline");
606 }
607 print_inlining(callee_method, jvms, false /* !success */);
608 return false;
609 }
610 }
611
612 //------------------------------build_inline_tree_for_callee-------------------
613 InlineTree *InlineTree::build_inline_tree_for_callee( ciMethod* callee_method, JVMState* caller_jvms, int caller_bci) {
614 // Attempt inlining.
615 InlineTree* old_ilt = callee_at(caller_bci, callee_method);
616 if (old_ilt != nullptr) {
617 return old_ilt;
618 }
619 int max_inline_level_adjust = 0;
620 if (caller_jvms->method() != nullptr) {
621 if (caller_jvms->method()->is_compiled_lambda_form()) {
622 max_inline_level_adjust += 1; // don't count actions in MH or indy adapter frames
623 } else if (callee_method->is_method_handle_intrinsic() ||
624 callee_method->is_compiled_lambda_form()) {
625 max_inline_level_adjust += 1; // don't count method handle calls from java.lang.invoke implementation
626 }
627 if (max_inline_level_adjust != 0 && C->print_inlining() && (Verbose || WizardMode)) {
628 C->inline_printer()->record(callee_method, caller_jvms, InliningResult::SUCCESS, " \\-> discounting inline depth");
629 }
630 if (max_inline_level_adjust != 0 && C->log()) {
631 int id1 = C->log()->identify(caller_jvms->method());
632 int id2 = C->log()->identify(callee_method);
633 C->log()->elem("inline_level_discount caller='%d' callee='%d'", id1, id2);
634 }
635 }
636 // Allocate in the comp_arena to make sure the InlineTree is live when dumping a replay compilation file
637 InlineTree* ilt = new (C->comp_arena()) InlineTree(C, this, callee_method, caller_jvms, caller_bci, _max_inline_level + max_inline_level_adjust);
638 _subtrees.append(ilt);
639
640 NOT_PRODUCT( _count_inlines += 1; )
641
642 return ilt;
643 }
644
645
646 //---------------------------------------callee_at-----------------------------
647 InlineTree *InlineTree::callee_at(int bci, ciMethod* callee) const {
648 for (int i = 0; i < _subtrees.length(); i++) {
649 InlineTree* sub = _subtrees.at(i);
650 if (sub->caller_bci() == bci && callee == sub->method()) {
651 return sub;
652 }
653 }
654 return nullptr;
655 }
656
657
658 //------------------------------build_inline_tree_root-------------------------
659 InlineTree *InlineTree::build_inline_tree_root() {
660 Compile* C = Compile::current();
661
662 // Root of inline tree
663 InlineTree* ilt = new InlineTree(C, nullptr, C->method(), nullptr, -1, MaxInlineLevel);
664
665 return ilt;
666 }
667
668
669 //-------------------------find_subtree_from_root-----------------------------
670 // Given a jvms, which determines a call chain from the root method,
671 // find the corresponding inline tree.
672 // Note: This method will be removed or replaced as InlineTree goes away.
673 InlineTree* InlineTree::find_subtree_from_root(InlineTree* root, JVMState* jvms, ciMethod* callee) {
674 InlineTree* iltp = root;
675 uint depth = jvms && jvms->has_method() ? jvms->depth() : 0;
676 for (uint d = 1; d <= depth; d++) {
677 JVMState* jvmsp = jvms->of_depth(d);
678 // Select the corresponding subtree for this bci.
679 assert(jvmsp->method() == iltp->method(), "tree still in sync");
680 ciMethod* d_callee = (d == depth) ? callee : jvms->of_depth(d+1)->method();
681 InlineTree* sub = iltp->callee_at(jvmsp->bci(), d_callee);
682 if (sub == nullptr) {
683 if (d == depth) {
684 sub = iltp->build_inline_tree_for_callee(d_callee, jvmsp, jvmsp->bci());
685 }
686 guarantee(sub != nullptr, "should be a sub-ilt here");
687 return sub;
688 }
689 iltp = sub;
690 }
691 return iltp;
692 }
693
694 // Count number of nodes in this subtree
695 int InlineTree::count() const {
696 int result = 1;
697 for (int i = 0 ; i < _subtrees.length(); i++) {
698 result += _subtrees.at(i)->count();
699 }
700 return result;
701 }
702
703 void InlineTree::dump_replay_data(outputStream* out, int depth_adjust) {
704 out->print(" %d %d %d ", inline_level() + depth_adjust, caller_bci(), _late_inline);
705 method()->dump_name_as_ascii(out);
706 for (int i = 0 ; i < _subtrees.length(); i++) {
707 _subtrees.at(i)->dump_replay_data(out, depth_adjust);
708 }
709 }
710
711
712 #ifndef PRODUCT
713 void InlineTree::print_impl(outputStream* st, int indent) const {
714 for (int i = 0; i < indent; i++) st->print(" ");
715 st->print(" @ %d", caller_bci());
716 method()->print_short_name(st);
717 st->cr();
718
719 for (int i = 0 ; i < _subtrees.length(); i++) {
720 _subtrees.at(i)->print_impl(st, indent + 2);
721 }
722 }
723
724 void InlineTree::print_value_on(outputStream* st) const {
725 print_impl(st, 2);
726 }
727 #endif