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() || !IncrementalInline) {
393 set_msg("inlining too deep");
394 return false;
395 } else if (!C->inlining_incrementally()) {
396 should_delay = true;
397 }
398 }
399
400 // detect direct and indirect recursive inlining
401 {
402 // count the current method and the callee
403 const bool is_compiled_lambda_form = callee_method->is_compiled_lambda_form();
404 int inline_level = 0;
405 if (!is_compiled_lambda_form) {
406 if (method() == callee_method) {
407 inline_level++;
408 }
409 }
410 // count callers of current method and callee
411 Node* callee_argument0 = is_compiled_lambda_form ? jvms->map()->argument(jvms, 0)->uncast() : NULL;
412 for (JVMState* j = jvms->caller(); j != NULL && j->has_method(); j = j->caller()) {
413 if (j->method() == callee_method) {
414 if (is_compiled_lambda_form) {
415 // Since compiled lambda forms are heavily reused we allow recursive inlining. If it is truly
416 // a recursion (using the same "receiver") we limit inlining otherwise we can easily blow the
417 // compiler stack.
418 Node* caller_argument0 = j->map()->argument(j, 0)->uncast();
419 if (caller_argument0 == callee_argument0) {
420 inline_level++;
421 }
422 } else {
423 inline_level++;
424 }
425 }
426 }
427 if (inline_level > MaxRecursiveInlineLevel) {
428 set_msg("recursive inlining is too deep");
429 return false;
430 }
431 }
432
433 int size = callee_method->code_size_for_inlining();
434
435 if (UseOldInlining && ClipInlining
436 && (int)count_inline_bcs() + size >= DesiredMethodLimit) {
437 if (!callee_method->force_inline() || !IncrementalInline) {
438 set_msg("size > DesiredMethodLimit");
439 return false;
440 } else if (!C->inlining_incrementally()) {
441 should_delay = true;
442 }
443 }
444
445 // ok, inline this method
446 return true;
447 }
448
449 //------------------------------pass_initial_checks----------------------------
450 bool pass_initial_checks(ciMethod* caller_method, int caller_bci, ciMethod* callee_method) {
451 ciInstanceKlass *callee_holder = callee_method ? callee_method->holder() : NULL;
452 // Check if a callee_method was suggested
453 if( callee_method == NULL ) return false;
454 // Check if klass of callee_method is loaded
455 if( !callee_holder->is_loaded() ) return false;
456 if( !callee_holder->is_initialized() ) return false;
457 if( !UseInterpreter || CompileTheWorld /* running Xcomp or CTW */ ) {
458 // Checks that constant pool's call site has been visited
459 // stricter than callee_holder->is_initialized()
460 ciBytecodeStream iter(caller_method);
461 iter.force_bci(caller_bci);
462 Bytecodes::Code call_bc = iter.cur_bc();
463 // An invokedynamic instruction does not have a klass.
464 if (call_bc != Bytecodes::_invokedynamic) {
465 int index = iter.get_index_u2_cpcache();
466 if (!caller_method->is_klass_loaded(index, true)) {
467 return false;
468 }
469 // Try to do constant pool resolution if running Xcomp
470 if( !caller_method->check_call(index, call_bc == Bytecodes::_invokestatic) ) {
471 return false;
472 }
473 }
474 }
475 // We will attempt to see if a class/field/etc got properly loaded. If it
476 // did not, it may attempt to throw an exception during our probing. Catch
477 // and ignore such exceptions and do not attempt to compile the method.
478 if( callee_method->should_exclude() ) return false;
479
480 return true;
481 }
482
483 //------------------------------check_can_parse--------------------------------
484 const char* InlineTree::check_can_parse(ciMethod* callee) {
485 // Certain methods cannot be parsed at all:
486 if ( callee->is_native()) return "native method";
487 if ( callee->is_abstract()) return "abstract method";
488 if (!callee->can_be_compiled()) return "not compilable (disabled)";
489 if (!callee->has_balanced_monitors()) return "not compilable (unbalanced monitors)";
490 if ( callee->get_flow_analysis()->failing()) return "not compilable (flow analysis failed)";
491 return NULL;
492 }
493
494 //------------------------------print_inlining---------------------------------
495 void InlineTree::print_inlining(ciMethod* callee_method, int caller_bci,
496 bool success) const {
497 const char* inline_msg = msg();
498 assert(inline_msg != NULL, "just checking");
499 if (C->log() != NULL) {
500 if (success) {
501 C->log()->inline_success(inline_msg);
502 } else {
503 C->log()->inline_fail(inline_msg);
504 }
505 }
506 if (C->print_inlining()) {
507 C->print_inlining(callee_method, inline_level(), caller_bci, inline_msg);
508 if (callee_method == NULL) tty->print(" callee not monotonic or profiled");
509 if (Verbose && callee_method) {
510 const InlineTree *top = this;
511 while( top->caller_tree() != NULL ) { top = top->caller_tree(); }
512 //tty->print(" bcs: %d+%d invoked: %d", top->count_inline_bcs(), callee_method->code_size(), callee_method->interpreter_invocation_count());
513 }
514 }
515 }
516
517 //------------------------------ok_to_inline-----------------------------------
518 WarmCallInfo* InlineTree::ok_to_inline(ciMethod* callee_method, JVMState* jvms, ciCallProfile& profile, WarmCallInfo* initial_wci, bool& should_delay) {
519 assert(callee_method != NULL, "caller checks for optimized virtual!");
520 assert(!should_delay, "should be initialized to false");
521 #ifdef ASSERT
522 // Make sure the incoming jvms has the same information content as me.
523 // This means that we can eventually make this whole class AllStatic.
524 if (jvms->caller() == NULL) {
525 assert(_caller_jvms == NULL, "redundant instance state");
526 } else {
527 assert(_caller_jvms->same_calls_as(jvms->caller()), "redundant instance state");
528 }
529 assert(_method == jvms->method(), "redundant instance state");
530 #endif
531 int caller_bci = jvms->bci();
532 ciMethod* caller_method = jvms->method();
533
534 // Do some initial checks.
535 if (!pass_initial_checks(caller_method, caller_bci, callee_method)) {
536 set_msg("failed initial checks");
537 print_inlining(callee_method, caller_bci, false /* !success */);
538 return NULL;
539 }
540
541 // Do some parse checks.
542 set_msg(check_can_parse(callee_method));
543 if (msg() != NULL) {
544 print_inlining(callee_method, caller_bci, false /* !success */);
545 return NULL;
546 }
547
548 // Check if inlining policy says no.
549 WarmCallInfo wci = *(initial_wci);
550 bool success = try_to_inline(callee_method, caller_method, caller_bci,
551 jvms, profile, &wci, should_delay);
552
553 #ifndef PRODUCT
554 if (UseOldInlining && InlineWarmCalls
555 && (PrintOpto || C->print_inlining())) {
556 bool cold = wci.is_cold();
557 bool hot = !cold && wci.is_hot();
558 bool old_cold = !success;
559 if (old_cold != cold || (Verbose || WizardMode)) {
560 if (msg() == NULL) {
561 set_msg("OK");
562 }
563 tty->print(" OldInlining= %4s : %s\n WCI=",
564 old_cold ? "cold" : "hot", msg());
565 wci.print();
566 }
567 }
568 #endif
569 if (UseOldInlining) {
570 if (success) {
571 wci = *(WarmCallInfo::always_hot());
572 } else {
573 wci = *(WarmCallInfo::always_cold());
574 }
575 }
576 if (!InlineWarmCalls) {
577 if (!wci.is_cold() && !wci.is_hot()) {
578 // Do not inline the warm calls.
579 wci = *(WarmCallInfo::always_cold());
580 }
581 }
582
583 if (!wci.is_cold()) {
584 // Inline!
585 if (msg() == NULL) {
586 set_msg("inline (hot)");
587 }
588 print_inlining(callee_method, caller_bci, true /* success */);
589 if (UseOldInlining)
590 build_inline_tree_for_callee(callee_method, jvms, caller_bci);
591 if (InlineWarmCalls && !wci.is_hot())
592 return new (C) WarmCallInfo(wci); // copy to heap
593 return WarmCallInfo::always_hot();
594 }
595
596 // Do not inline
597 if (msg() == NULL) {
598 set_msg("too cold to inline");
599 }
600 print_inlining(callee_method, caller_bci, false /* !success */ );
601 return NULL;
602 }
603
604 //------------------------------compute_callee_frequency-----------------------
605 float InlineTree::compute_callee_frequency( int caller_bci ) const {
606 int count = method()->interpreter_call_site_count(caller_bci);
607 int invcnt = method()->interpreter_invocation_count();
608 float freq = (float)count/(float)invcnt;
609 // Call-site count / interpreter invocation count, scaled recursively.
610 // Always between 0.0 and 1.0. Represents the percentage of the method's
611 // total execution time used at this call site.
612
613 return freq;
614 }
615
616 //------------------------------build_inline_tree_for_callee-------------------
617 InlineTree *InlineTree::build_inline_tree_for_callee( ciMethod* callee_method, JVMState* caller_jvms, int caller_bci) {
618 float recur_frequency = _site_invoke_ratio * compute_callee_frequency(caller_bci);
619 // Attempt inlining.
620 InlineTree* old_ilt = callee_at(caller_bci, callee_method);
621 if (old_ilt != NULL) {
622 return old_ilt;
623 }
624 int max_inline_level_adjust = 0;
625 if (caller_jvms->method() != NULL) {
626 if (caller_jvms->method()->is_compiled_lambda_form())
627 max_inline_level_adjust += 1; // don't count actions in MH or indy adapter frames
628 else if (callee_method->is_method_handle_intrinsic() ||
629 callee_method->is_compiled_lambda_form()) {
630 max_inline_level_adjust += 1; // don't count method handle calls from java.lang.invoke implem
631 }
632 if (max_inline_level_adjust != 0 && C->print_inlining() && (Verbose || WizardMode)) {
633 CompileTask::print_inline_indent(inline_level());
634 tty->print_cr(" \\-> discounting inline depth");
635 }
636 if (max_inline_level_adjust != 0 && C->log()) {
637 int id1 = C->log()->identify(caller_jvms->method());
638 int id2 = C->log()->identify(callee_method);
639 C->log()->elem("inline_level_discount caller='%d' callee='%d'", id1, id2);
640 }
641 }
642 InlineTree* ilt = new InlineTree(C, this, callee_method, caller_jvms, caller_bci, recur_frequency, _max_inline_level + max_inline_level_adjust);
643 _subtrees.append(ilt);
644
645 NOT_PRODUCT( _count_inlines += 1; )
646
647 return ilt;
648 }
649
650
651 //---------------------------------------callee_at-----------------------------
652 InlineTree *InlineTree::callee_at(int bci, ciMethod* callee) const {
653 for (int i = 0; i < _subtrees.length(); i++) {
654 InlineTree* sub = _subtrees.at(i);
655 if (sub->caller_bci() == bci && callee == sub->method()) {
656 return sub;
657 }
658 }
659 return NULL;
660 }
661
662
663 //------------------------------build_inline_tree_root-------------------------
664 InlineTree *InlineTree::build_inline_tree_root() {
665 Compile* C = Compile::current();
666
667 // Root of inline tree
668 InlineTree* ilt = new InlineTree(C, NULL, C->method(), NULL, -1, 1.0F, MaxInlineLevel);
669
670 return ilt;
671 }
672
673
674 //-------------------------find_subtree_from_root-----------------------------
675 // Given a jvms, which determines a call chain from the root method,
676 // find the corresponding inline tree.
677 // Note: This method will be removed or replaced as InlineTree goes away.
678 InlineTree* InlineTree::find_subtree_from_root(InlineTree* root, JVMState* jvms, ciMethod* callee) {
679 InlineTree* iltp = root;
680 uint depth = jvms && jvms->has_method() ? jvms->depth() : 0;
681 for (uint d = 1; d <= depth; d++) {
682 JVMState* jvmsp = jvms->of_depth(d);
683 // Select the corresponding subtree for this bci.
684 assert(jvmsp->method() == iltp->method(), "tree still in sync");
685 ciMethod* d_callee = (d == depth) ? callee : jvms->of_depth(d+1)->method();
686 InlineTree* sub = iltp->callee_at(jvmsp->bci(), d_callee);
687 if (sub == NULL) {
688 if (d == depth) {
689 sub = iltp->build_inline_tree_for_callee(d_callee, jvmsp, jvmsp->bci());
690 }
691 guarantee(sub != NULL, "should be a sub-ilt here");
692 return sub;
693 }
694 iltp = sub;
695 }
696 return iltp;
697 }
698
699
700
701 #ifndef PRODUCT
702 void InlineTree::print_impl(outputStream* st, int indent) const {
703 for (int i = 0; i < indent; i++) st->print(" ");
704 st->print(" @ %d ", caller_bci());
705 method()->print_short_name(st);
706 st->cr();
707
708 for (int i = 0 ; i < _subtrees.length(); i++) {
709 _subtrees.at(i)->print_impl(st, indent + 2);
710 }
711 }
712
713 void InlineTree::print_value_on(outputStream* st) const {
714 print_impl(st, 2);
715 }
716 #endif