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/ciCallSite.hpp"
26 #include "ci/ciMethodHandle.hpp"
27 #include "ci/ciSymbols.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "compiler/compileBroker.hpp"
30 #include "compiler/compileLog.hpp"
31 #include "interpreter/linkResolver.hpp"
32 #include "logging/log.hpp"
33 #include "logging/logLevel.hpp"
34 #include "logging/logMessage.hpp"
35 #include "logging/logStream.hpp"
36 #include "opto/addnode.hpp"
37 #include "opto/callGenerator.hpp"
38 #include "opto/castnode.hpp"
39 #include "opto/cfgnode.hpp"
40 #include "opto/mulnode.hpp"
41 #include "opto/parse.hpp"
42 #include "opto/rootnode.hpp"
43 #include "opto/runtime.hpp"
44 #include "opto/subnode.hpp"
45 #include "prims/methodHandles.hpp"
46 #include "runtime/sharedRuntime.hpp"
47 #include "utilities/macros.hpp"
48 #if INCLUDE_JFR
49 #include "jfr/jfr.hpp"
50 #endif
51
52 static void print_trace_type_profile(outputStream* out, int depth, ciKlass* prof_klass, int site_count, int receiver_count,
53 bool with_deco) {
54 if (with_deco) {
55 CompileTask::print_inline_indent(depth, out);
56 }
57 out->print(" \\-> TypeProfile (%d/%d counts) = ", receiver_count, site_count);
58 prof_klass->name()->print_symbol_on(out);
59 if (with_deco) {
60 out->cr();
61 }
62 }
63
64 static void trace_type_profile(Compile* C, ciMethod* method, JVMState* jvms,
65 ciMethod* prof_method, ciKlass* prof_klass, int site_count, int receiver_count) {
66 int depth = jvms->depth() - 1;
67 int bci = jvms->bci();
68 if (TraceTypeProfile || C->print_inlining()) {
69 if (!C->print_inlining()) {
70 if (!PrintOpto && !PrintCompilation) {
71 method->print_short_name();
72 tty->cr();
73 }
74 CompileTask::print_inlining_tty(prof_method, depth, bci, InliningResult::SUCCESS);
75 print_trace_type_profile(tty, depth, prof_klass, site_count, receiver_count, true);
76 } else {
77 auto stream = C->inline_printer()->record(method, jvms, InliningResult::SUCCESS);
78 print_trace_type_profile(stream, depth, prof_klass, site_count, receiver_count, false);
79 }
80 }
81
82 LogTarget(Debug, jit, inlining) lt;
83 if (lt.is_enabled()) {
84 LogStream ls(lt);
85 print_trace_type_profile(&ls, depth, prof_klass, site_count, receiver_count, true);
86 }
87 }
88
89 CallGenerator* Compile::call_generator(ciMethod* callee, int vtable_index, bool call_does_dispatch,
90 JVMState* jvms, bool allow_inline,
91 float prof_factor, ciKlass* speculative_receiver_type,
92 bool allow_intrinsics) {
93 assert(callee != nullptr, "failed method resolution");
94
95 ciMethod* caller = jvms->method();
96 int bci = jvms->bci();
97 Bytecodes::Code bytecode = caller->java_code_at_bci(bci);
98 ciMethod* orig_callee = caller->get_method_at_bci(bci);
99
100 const bool is_virtual_or_interface = (bytecode == Bytecodes::_invokevirtual) ||
101 (bytecode == Bytecodes::_invokeinterface) ||
102 (orig_callee->intrinsic_id() == vmIntrinsics::_linkToVirtual) ||
103 (orig_callee->intrinsic_id() == vmIntrinsics::_linkToInterface);
104
105 // Dtrace currently doesn't work unless all calls are vanilla
106 if (env()->dtrace_method_probes()) {
107 allow_inline = false;
108 }
109
110 // Note: When we get profiling during stage-1 compiles, we want to pull
111 // from more specific profile data which pertains to this inlining.
112 // Right now, ignore the information in jvms->caller(), and do method[bci].
113 ciCallProfile profile = caller->call_profile_at_bci(bci);
114
115 // See how many times this site has been invoked.
116 int site_count = profile.count();
117 int receiver_count = -1;
118 if (call_does_dispatch && UseTypeProfile && profile.has_receiver(0)) {
119 // Receivers in the profile structure are ordered by call counts
120 // so that the most called (major) receiver is profile.receiver(0).
121 receiver_count = profile.receiver_count(0);
122 }
123
124 CompileLog* log = this->log();
125 if (log != nullptr) {
126 int rid = (receiver_count >= 0)? log->identify(profile.receiver(0)): -1;
127 int r2id = (rid != -1 && profile.has_receiver(1))? log->identify(profile.receiver(1)):-1;
128 log->begin_elem("call method='%d' count='%d' prof_factor='%f'",
129 log->identify(callee), site_count, prof_factor);
130 if (call_does_dispatch) log->print(" virtual='1'");
131 if (allow_inline) log->print(" inline='1'");
132 if (receiver_count >= 0) {
133 log->print(" receiver='%d' receiver_count='%d'", rid, receiver_count);
134 if (profile.has_receiver(1)) {
135 log->print(" receiver2='%d' receiver2_count='%d'", r2id, profile.receiver_count(1));
136 }
137 }
138 if (callee->is_method_handle_intrinsic()) {
139 log->print(" method_handle_intrinsic='1'");
140 }
141 log->end_elem();
142 }
143
144 // Special case the handling of certain common, profitable library
145 // methods. If these methods are replaced with specialized code,
146 // then we return it as the inlined version of the call.
147 CallGenerator* cg_intrinsic = nullptr;
148 if (allow_inline && allow_intrinsics) {
149 CallGenerator* cg = find_intrinsic(callee, call_does_dispatch);
150 if (cg != nullptr) {
151 if (cg->is_predicated()) {
152 // Code without intrinsic but, hopefully, inlined.
153 CallGenerator* inline_cg = this->call_generator(callee,
154 vtable_index, call_does_dispatch, jvms, allow_inline, prof_factor, speculative_receiver_type, false);
155 if (inline_cg != nullptr) {
156 cg = CallGenerator::for_predicated_intrinsic(cg, inline_cg);
157 }
158 }
159
160 // If intrinsic does the virtual dispatch, we try to use the type profile
161 // first, and hopefully inline it as the regular virtual call below.
162 // We will retry the intrinsic if nothing had claimed it afterwards.
163 if (cg->does_virtual_dispatch()) {
164 cg_intrinsic = cg;
165 cg = nullptr;
166 } else if (IncrementalInline && should_delay_vector_inlining(callee, jvms)) {
167 return CallGenerator::for_late_inline(callee, cg);
168 } else {
169 return cg;
170 }
171 }
172 }
173
174 // Do method handle calls.
175 // NOTE: This must happen before normal inlining logic below since
176 // MethodHandle.invoke* are native methods which obviously don't
177 // have bytecodes and so normal inlining fails.
178 if (callee->is_method_handle_intrinsic()) {
179 CallGenerator* cg = CallGenerator::for_method_handle_call(jvms, caller, callee, allow_inline);
180 return cg;
181 }
182
183 // Attempt to inline...
184 if (allow_inline) {
185 // The profile data is only partly attributable to this caller,
186 // scale back the call site information.
187 float past_uses = jvms->method()->scale_count(site_count, prof_factor);
188 // This is the number of times we expect the call code to be used.
189 float expected_uses = past_uses;
190
191 // Try inlining a bytecoded method:
192 if (!call_does_dispatch) {
193 InlineTree* ilt = InlineTree::find_subtree_from_root(this->ilt(), jvms->caller(), jvms->method());
194 bool should_delay = C->should_delay_inlining();
195 if (ilt->ok_to_inline(callee, jvms, profile, should_delay)) {
196 CallGenerator* cg = CallGenerator::for_inline(callee, expected_uses);
197 // For optimized virtual calls assert at runtime that receiver object
198 // is a subtype of the inlined method holder. CHA can report a method
199 // as a unique target under an abstract method, but receiver type
200 // sometimes has a broader type. Similar scenario is possible with
201 // default methods when type system loses information about implemented
202 // interfaces.
203 if (cg != nullptr && is_virtual_or_interface && !callee->is_static()) {
204 CallGenerator* trap_cg = CallGenerator::for_uncommon_trap(callee,
205 Deoptimization::Reason_receiver_constraint, Deoptimization::Action_none);
206
207 cg = CallGenerator::for_guarded_call(callee->holder(), trap_cg, cg);
208 }
209 if (cg != nullptr) {
210 // Delay the inlining of this method to give us the
211 // opportunity to perform some high level optimizations
212 // first.
213 if (should_delay) {
214 return CallGenerator::for_late_inline(callee, cg);
215 } else if (should_delay_string_inlining(callee, jvms)) {
216 return CallGenerator::for_string_late_inline(callee, cg);
217 } else if (should_delay_boxing_inlining(callee, jvms)) {
218 return CallGenerator::for_boxing_late_inline(callee, cg);
219 } else if (should_delay_vector_reboxing_inlining(callee, jvms)) {
220 return CallGenerator::for_vector_reboxing_late_inline(callee, cg);
221 } else {
222 return cg;
223 }
224 }
225 }
226 }
227
228 // Try using the type profile.
229 if (call_does_dispatch && site_count > 0 && UseTypeProfile) {
230 // The major receiver's count >= TypeProfileMajorReceiverPercent of site_count.
231 bool have_major_receiver = profile.has_receiver(0) && (100.*profile.receiver_prob(0) >= (float)TypeProfileMajorReceiverPercent);
232 ciMethod* receiver_method = nullptr;
233
234 int morphism = profile.morphism();
235 if (speculative_receiver_type != nullptr) {
236 if (!too_many_traps_or_recompiles(caller, bci, Deoptimization::Reason_speculate_class_check)) {
237 // We have a speculative type, we should be able to resolve
238 // the call. We do that before looking at the profiling at
239 // this invoke because it may lead to bimorphic inlining which
240 // a speculative type should help us avoid.
241 receiver_method = callee->resolve_invoke(jvms->method()->holder(),
242 speculative_receiver_type);
243 if (receiver_method == nullptr) {
244 speculative_receiver_type = nullptr;
245 } else {
246 morphism = 1;
247 }
248 } else {
249 // speculation failed before. Use profiling at the call
250 // (could allow bimorphic inlining for instance).
251 speculative_receiver_type = nullptr;
252 }
253 }
254 if (receiver_method == nullptr &&
255 (have_major_receiver || morphism == 1 ||
256 (morphism == 2 && UseBimorphicInlining))) {
257 // receiver_method = profile.method();
258 // Profiles do not suggest methods now. Look it up in the major receiver.
259 receiver_method = callee->resolve_invoke(jvms->method()->holder(),
260 profile.receiver(0));
261 }
262 if (receiver_method != nullptr) {
263 // The single majority receiver sufficiently outweighs the minority.
264 CallGenerator* hit_cg = this->call_generator(receiver_method,
265 vtable_index, !call_does_dispatch, jvms, allow_inline, prof_factor);
266 if (hit_cg != nullptr) {
267 // Look up second receiver.
268 CallGenerator* next_hit_cg = nullptr;
269 ciMethod* next_receiver_method = nullptr;
270 if (morphism == 2 && UseBimorphicInlining) {
271 next_receiver_method = callee->resolve_invoke(jvms->method()->holder(),
272 profile.receiver(1));
273 if (next_receiver_method != nullptr) {
274 next_hit_cg = this->call_generator(next_receiver_method,
275 vtable_index, !call_does_dispatch, jvms,
276 allow_inline, prof_factor);
277 if (next_hit_cg != nullptr && !next_hit_cg->is_inline() &&
278 have_major_receiver && UseOnlyInlinedBimorphic) {
279 // Skip if we can't inline second receiver's method
280 next_hit_cg = nullptr;
281 }
282 }
283 }
284 CallGenerator* miss_cg;
285 Deoptimization::DeoptReason reason = (morphism == 2
286 ? Deoptimization::Reason_bimorphic
287 : Deoptimization::reason_class_check(speculative_receiver_type != nullptr));
288 if ((morphism == 1 || (morphism == 2 && next_hit_cg != nullptr)) &&
289 !too_many_traps_or_recompiles(caller, bci, reason)
290 ) {
291 // Generate uncommon trap for class check failure path
292 // in case of monomorphic or bimorphic virtual call site.
293 miss_cg = CallGenerator::for_uncommon_trap(callee, reason,
294 Deoptimization::Action_maybe_recompile);
295 } else {
296 // Generate virtual call for class check failure path
297 // in case of polymorphic virtual call site.
298 miss_cg = (IncrementalInlineVirtual ? CallGenerator::for_late_inline_virtual(callee, vtable_index, prof_factor)
299 : CallGenerator::for_virtual_call(callee, vtable_index));
300 }
301 if (miss_cg != nullptr) {
302 if (next_hit_cg != nullptr) {
303 assert(speculative_receiver_type == nullptr, "shouldn't end up here if we used speculation");
304 trace_type_profile(C, jvms->method(), jvms, next_receiver_method, profile.receiver(1), site_count, profile.receiver_count(1));
305 // We don't need to record dependency on a receiver here and below.
306 // Whenever we inline, the dependency is added by Parse::Parse().
307 miss_cg = CallGenerator::for_predicted_call(profile.receiver(1), miss_cg, next_hit_cg, PROB_MAX);
308 }
309 if (miss_cg != nullptr) {
310 ciKlass* k = speculative_receiver_type != nullptr ? speculative_receiver_type : profile.receiver(0);
311 trace_type_profile(C, jvms->method(), jvms, receiver_method, k, site_count, receiver_count);
312 float hit_prob = speculative_receiver_type != nullptr ? 1.0 : profile.receiver_prob(0);
313 CallGenerator* cg = CallGenerator::for_predicted_call(k, miss_cg, hit_cg, hit_prob);
314 if (cg != nullptr) {
315 return cg;
316 }
317 }
318 }
319 }
320 }
321 }
322
323 // If there is only one implementor of this interface then we
324 // may be able to bind this invoke directly to the implementing
325 // klass but we need both a dependence on the single interface
326 // and on the method we bind to. Additionally since all we know
327 // about the receiver type is that it's supposed to implement the
328 // interface we have to insert a check that it's the class we
329 // expect. Interface types are not checked by the verifier so
330 // they are roughly equivalent to Object.
331 // The number of implementors for declared_interface is less or
332 // equal to the number of implementors for target->holder() so
333 // if number of implementors of target->holder() == 1 then
334 // number of implementors for decl_interface is 0 or 1. If
335 // it's 0 then no class implements decl_interface and there's
336 // no point in inlining.
337 if (call_does_dispatch && bytecode == Bytecodes::_invokeinterface) {
338 ciInstanceKlass* declared_interface =
339 caller->get_declared_method_holder_at_bci(bci)->as_instance_klass();
340 ciInstanceKlass* singleton = declared_interface->unique_implementor();
341
342 if (singleton != nullptr) {
343 assert(singleton != declared_interface, "not a unique implementor");
344
345 ciMethod* cha_monomorphic_target =
346 callee->find_monomorphic_target(caller->holder(), declared_interface, singleton);
347
348 if (cha_monomorphic_target != nullptr &&
349 cha_monomorphic_target->holder() != env()->Object_klass()) { // subtype check against Object is useless
350 ciKlass* holder = cha_monomorphic_target->holder();
351
352 // Try to inline the method found by CHA. Inlined method is guarded by the type check.
353 CallGenerator* hit_cg = call_generator(cha_monomorphic_target,
354 vtable_index, !call_does_dispatch, jvms, allow_inline, prof_factor);
355
356 // Deoptimize on type check fail. The interpreter will throw ICCE for us.
357 CallGenerator* miss_cg = CallGenerator::for_uncommon_trap(callee,
358 Deoptimization::Reason_class_check, Deoptimization::Action_none);
359
360 ciKlass* constraint = (holder->is_subclass_of(singleton) ? holder : singleton); // avoid upcasts
361 CallGenerator* cg = CallGenerator::for_guarded_call(constraint, miss_cg, hit_cg);
362 if (hit_cg != nullptr && cg != nullptr) {
363 dependencies()->assert_unique_implementor(declared_interface, singleton);
364 dependencies()->assert_unique_concrete_method(declared_interface, cha_monomorphic_target, declared_interface, callee);
365 return cg;
366 }
367 }
368 }
369 } // call_does_dispatch && bytecode == Bytecodes::_invokeinterface
370
371 // Nothing claimed the intrinsic, we go with straight-forward inlining
372 // for already discovered intrinsic.
373 if (allow_intrinsics && cg_intrinsic != nullptr) {
374 assert(cg_intrinsic->does_virtual_dispatch(), "sanity");
375 return cg_intrinsic;
376 }
377 } // allow_inline
378
379 // There was no special inlining tactic, or it bailed out.
380 // Use a more generic tactic, like a simple call.
381 if (call_does_dispatch) {
382 const char* msg = "virtual call";
383 C->inline_printer()->record(callee, jvms, InliningResult::FAILURE, msg);
384 C->log_inline_failure(msg);
385 if (IncrementalInlineVirtual && allow_inline) {
386 return CallGenerator::for_late_inline_virtual(callee, vtable_index, prof_factor); // attempt to inline through virtual call later
387 } else {
388 return CallGenerator::for_virtual_call(callee, vtable_index);
389 }
390 } else {
391 // Class Hierarchy Analysis or Type Profile reveals a unique target, or it is a static or special call.
392 CallGenerator* cg = CallGenerator::for_direct_call(callee, should_delay_inlining(callee, jvms));
393 // For optimized virtual calls assert at runtime that receiver object
394 // is a subtype of the method holder.
395 if (cg != nullptr && is_virtual_or_interface && !callee->is_static()) {
396 CallGenerator* trap_cg = CallGenerator::for_uncommon_trap(callee,
397 Deoptimization::Reason_receiver_constraint, Deoptimization::Action_none);
398 cg = CallGenerator::for_guarded_call(callee->holder(), trap_cg, cg);
399 }
400 return cg;
401 }
402 }
403
404 // Return true for methods that shouldn't be inlined early so that
405 // they are easier to analyze and optimize as intrinsics.
406 bool Compile::should_delay_string_inlining(ciMethod* call_method, JVMState* jvms) {
407 if (has_stringbuilder()) {
408
409 if ((call_method->holder() == C->env()->StringBuilder_klass() ||
410 call_method->holder() == C->env()->StringBuffer_klass()) &&
411 (jvms->method()->holder() == C->env()->StringBuilder_klass() ||
412 jvms->method()->holder() == C->env()->StringBuffer_klass())) {
413 // Delay SB calls only when called from non-SB code
414 return false;
415 }
416
417 switch (call_method->intrinsic_id()) {
418 case vmIntrinsics::_StringBuilder_void:
419 case vmIntrinsics::_StringBuilder_int:
420 case vmIntrinsics::_StringBuilder_String:
421 case vmIntrinsics::_StringBuilder_append_char:
422 case vmIntrinsics::_StringBuilder_append_int:
423 case vmIntrinsics::_StringBuilder_append_String:
424 case vmIntrinsics::_StringBuilder_toString:
425 case vmIntrinsics::_StringBuffer_void:
426 case vmIntrinsics::_StringBuffer_int:
427 case vmIntrinsics::_StringBuffer_String:
428 case vmIntrinsics::_StringBuffer_append_char:
429 case vmIntrinsics::_StringBuffer_append_int:
430 case vmIntrinsics::_StringBuffer_append_String:
431 case vmIntrinsics::_StringBuffer_toString:
432 case vmIntrinsics::_Integer_toString:
433 return true;
434
435 case vmIntrinsics::_String_String:
436 {
437 Node* receiver = jvms->map()->in(jvms->argoff() + 1);
438 if (receiver->is_Proj() && receiver->in(0)->is_CallStaticJava()) {
439 CallStaticJavaNode* csj = receiver->in(0)->as_CallStaticJava();
440 ciMethod* m = csj->method();
441 if (m != nullptr &&
442 (m->intrinsic_id() == vmIntrinsics::_StringBuffer_toString ||
443 m->intrinsic_id() == vmIntrinsics::_StringBuilder_toString))
444 // Delay String.<init>(new SB())
445 return true;
446 }
447 return false;
448 }
449
450 default:
451 return false;
452 }
453 }
454 return false;
455 }
456
457 bool Compile::should_delay_boxing_inlining(ciMethod* call_method, JVMState* jvms) {
458 if (eliminate_boxing() && call_method->is_boxing_method()) {
459 set_has_boxed_value(true);
460 return aggressive_unboxing();
461 }
462 return false;
463 }
464
465 bool Compile::should_delay_vector_inlining(ciMethod* call_method, JVMState* jvms) {
466 return EnableVectorSupport && call_method->is_vector_method();
467 }
468
469 bool Compile::should_delay_vector_reboxing_inlining(ciMethod* call_method, JVMState* jvms) {
470 return EnableVectorSupport && (call_method->intrinsic_id() == vmIntrinsics::_VectorRebox);
471 }
472
473 // uncommon-trap call-sites where callee is unloaded, uninitialized or will not link
474 bool Parse::can_not_compile_call_site(ciMethod *dest_method, ciInstanceKlass* klass) {
475 // Additional inputs to consider...
476 // bc = bc()
477 // caller = method()
478 // iter().get_method_holder_index()
479 assert( dest_method->is_loaded(), "ciTypeFlow should not let us get here" );
480 // Interface classes can be loaded & linked and never get around to
481 // being initialized. Uncommon-trap for not-initialized static or
482 // v-calls. Let interface calls happen.
483 ciInstanceKlass* holder_klass = dest_method->holder();
484 if (!holder_klass->is_being_initialized() &&
485 !holder_klass->is_initialized() &&
486 !holder_klass->is_interface()) {
487 uncommon_trap(Deoptimization::Reason_uninitialized,
488 Deoptimization::Action_reinterpret,
489 holder_klass);
490 return true;
491 }
492
493 assert(dest_method->is_loaded(), "dest_method: typeflow responsibility");
494 return false;
495 }
496
497 #ifdef ASSERT
498 static bool check_call_consistency(JVMState* jvms, CallGenerator* cg) {
499 ciMethod* symbolic_info = jvms->method()->get_method_at_bci(jvms->bci());
500 ciMethod* resolved_method = cg->method();
501 if (!ciMethod::is_consistent_info(symbolic_info, resolved_method)) {
502 tty->print_cr("JVMS:");
503 jvms->dump();
504 tty->print_cr("Bytecode info:");
505 jvms->method()->get_method_at_bci(jvms->bci())->print(); tty->cr();
506 tty->print_cr("Resolved method:");
507 cg->method()->print(); tty->cr();
508 return false;
509 }
510 return true;
511 }
512 #endif // ASSERT
513
514 //------------------------------do_call----------------------------------------
515 // Handle your basic call. Inline if we can & want to, else just setup call.
516 void Parse::do_call() {
517 // It's likely we are going to add debug info soon.
518 // Also, if we inline a guy who eventually needs debug info for this JVMS,
519 // our contribution to it is cleaned up right here.
520 kill_dead_locals();
521
522 // Set frequently used booleans
523 const bool is_virtual = bc() == Bytecodes::_invokevirtual;
524 const bool is_virtual_or_interface = is_virtual || bc() == Bytecodes::_invokeinterface;
525 const bool has_receiver = Bytecodes::has_receiver(bc());
526
527 // Find target being called
528 bool will_link;
529 ciSignature* declared_signature = nullptr;
530 ciMethod* orig_callee = iter().get_method(will_link, &declared_signature); // callee in the bytecode
531 ciInstanceKlass* holder_klass = orig_callee->holder();
532 ciKlass* holder = iter().get_declared_method_holder();
533 ciInstanceKlass* klass = ciEnv::get_instance_klass_for_declared_method_holder(holder);
534 assert(declared_signature != nullptr, "cannot be null");
535 JFR_ONLY(Jfr::on_resolution(this, holder, orig_callee);)
536
537 // Bump max node limit for JSR292 users
538 if (bc() == Bytecodes::_invokedynamic || orig_callee->is_method_handle_intrinsic()) {
539 C->set_max_node_limit(3*MaxNodeLimit);
540 }
541
542 // uncommon-trap when callee is unloaded, uninitialized or will not link
543 // bailout when too many arguments for register representation
544 if (!will_link || can_not_compile_call_site(orig_callee, klass)) {
545 if (PrintOpto && (Verbose || WizardMode)) {
546 method()->print_name(); tty->print_cr(" can not compile call at bci %d to:", bci());
547 orig_callee->print_name(); tty->cr();
548 }
549 return;
550 }
551 assert(holder_klass->is_loaded(), "");
552 //assert((bc_callee->is_static() || is_invokedynamic) == !has_receiver , "must match bc"); // XXX invokehandle (cur_bc_raw)
553 // Note: this takes into account invokeinterface of methods declared in java/lang/Object,
554 // which should be invokevirtuals but according to the VM spec may be invokeinterfaces
555 assert(holder_klass->is_interface() || holder_klass->super() == nullptr || (bc() != Bytecodes::_invokeinterface), "must match bc");
556 // Note: In the absence of miranda methods, an abstract class K can perform
557 // an invokevirtual directly on an interface method I.m if K implements I.
558
559 // orig_callee is the resolved callee which's signature includes the
560 // appendix argument.
561 const int nargs = orig_callee->arg_size();
562 const bool is_signature_polymorphic = MethodHandles::is_signature_polymorphic(orig_callee->intrinsic_id());
563
564 // Push appendix argument (MethodType, CallSite, etc.), if one.
565 if (iter().has_appendix()) {
566 ciObject* appendix_arg = iter().get_appendix();
567 const TypeOopPtr* appendix_arg_type = TypeOopPtr::make_from_constant(appendix_arg, /* require_const= */ true);
568 Node* appendix_arg_node = _gvn.makecon(appendix_arg_type);
569 push(appendix_arg_node);
570 }
571
572 // ---------------------
573 // Does Class Hierarchy Analysis reveal only a single target of a v-call?
574 // Then we may inline or make a static call, but become dependent on there being only 1 target.
575 // Does the call-site type profile reveal only one receiver?
576 // Then we may introduce a run-time check and inline on the path where it succeeds.
577 // The other path may uncommon_trap, check for another receiver, or do a v-call.
578
579 // Try to get the most accurate receiver type
580 ciMethod* callee = orig_callee;
581 int vtable_index = Method::invalid_vtable_index;
582 bool call_does_dispatch = false;
583
584 // Speculative type of the receiver if any
585 ciKlass* speculative_receiver_type = nullptr;
586 if (is_virtual_or_interface) {
587 Node* receiver_node = stack(sp() - nargs);
588 const TypeOopPtr* receiver_type = _gvn.type(receiver_node)->isa_oopptr();
589 // call_does_dispatch and vtable_index are out-parameters. They might be changed.
590 // For arrays, klass below is Object. When vtable calls are used,
591 // resolving the call with Object would allow an illegal call to
592 // finalize() on an array. We use holder instead: illegal calls to
593 // finalize() won't be compiled as vtable calls (IC call
594 // resolution will catch the illegal call) and the few legal calls
595 // on array types won't be either.
596 callee = C->optimize_virtual_call(method(), klass, holder, orig_callee,
597 receiver_type, is_virtual,
598 call_does_dispatch, vtable_index); // out-parameters
599 speculative_receiver_type = receiver_type != nullptr ? receiver_type->speculative_type() : nullptr;
600 }
601
602 // Additional receiver subtype checks for interface calls via invokespecial or invokeinterface.
603 ciKlass* receiver_constraint = nullptr;
604 if (iter().cur_bc_raw() == Bytecodes::_invokespecial && !orig_callee->is_object_initializer()) {
605 ciInstanceKlass* calling_klass = method()->holder();
606 ciInstanceKlass* sender_klass = calling_klass;
607 if (sender_klass->is_interface()) {
608 receiver_constraint = sender_klass;
609 }
610 } else if (iter().cur_bc_raw() == Bytecodes::_invokeinterface && orig_callee->is_private()) {
611 assert(holder->is_interface(), "How did we get a non-interface method here!");
612 receiver_constraint = holder;
613 }
614
615 if (receiver_constraint != nullptr) {
616 Node* receiver_node = stack(sp() - nargs);
617 Node* cls_node = makecon(TypeKlassPtr::make(receiver_constraint, Type::trust_interfaces));
618 Node* bad_type_ctrl = nullptr;
619 Node* casted_receiver = gen_checkcast(receiver_node, cls_node, &bad_type_ctrl);
620 if (bad_type_ctrl != nullptr) {
621 PreserveJVMState pjvms(this);
622 set_control(bad_type_ctrl);
623 uncommon_trap(Deoptimization::Reason_class_check,
624 Deoptimization::Action_none);
625 }
626 if (stopped()) {
627 return; // MUST uncommon-trap?
628 }
629 set_stack(sp() - nargs, casted_receiver);
630 }
631
632 // Note: It's OK to try to inline a virtual call.
633 // The call generator will not attempt to inline a polymorphic call
634 // unless it knows how to optimize the receiver dispatch.
635 bool try_inline = (C->do_inlining() || InlineAccessors);
636
637 // ---------------------
638 dec_sp(nargs); // Temporarily pop args for JVM state of call
639 JVMState* jvms = sync_jvms();
640
641 // ---------------------
642 // Decide call tactic.
643 // This call checks with CHA, the interpreter profile, intrinsics table, etc.
644 // It decides whether inlining is desirable or not.
645 CallGenerator* cg = C->call_generator(callee, vtable_index, call_does_dispatch, jvms, try_inline, prof_factor(), speculative_receiver_type);
646
647 // NOTE: Don't use orig_callee and callee after this point! Use cg->method() instead.
648 orig_callee = callee = nullptr;
649
650 // ---------------------
651
652 // Feed profiling data for arguments to the type system so it can
653 // propagate it as speculative types
654 record_profiled_arguments_for_speculation(cg->method(), bc());
655
656 #ifndef PRODUCT
657 // bump global counters for calls
658 count_compiled_calls(/*at_method_entry*/ false, cg->is_inline());
659
660 // Record first part of parsing work for this call
661 parse_histogram()->record_change();
662 #endif // not PRODUCT
663
664 assert(jvms == this->jvms(), "still operating on the right JVMS");
665 assert(jvms_in_sync(), "jvms must carry full info into CG");
666
667 // save across call, for a subsequent cast_not_null.
668 Node* receiver = has_receiver ? argument(0) : nullptr;
669
670 // The extra CheckCastPPs for speculative types mess with PhaseStringOpts
671 if (receiver != nullptr && !call_does_dispatch && !cg->is_string_late_inline()) {
672 // Feed profiling data for a single receiver to the type system so
673 // it can propagate it as a speculative type
674 receiver = record_profiled_receiver_for_speculation(receiver);
675 }
676
677 JVMState* new_jvms = cg->generate(jvms);
678 if (new_jvms == nullptr) {
679 // When inlining attempt fails (e.g., too many arguments),
680 // it may contaminate the current compile state, making it
681 // impossible to pull back and try again. Once we call
682 // cg->generate(), we are committed. If it fails, the whole
683 // compilation task is compromised.
684 if (failing()) return;
685
686 // This can happen if a library intrinsic is available, but refuses
687 // the call site, perhaps because it did not match a pattern the
688 // intrinsic was expecting to optimize. Should always be possible to
689 // get a normal java call that may inline in that case
690 cg = C->call_generator(cg->method(), vtable_index, call_does_dispatch, jvms, try_inline, prof_factor(), speculative_receiver_type, /* allow_intrinsics= */ false);
691 new_jvms = cg->generate(jvms);
692 if (new_jvms == nullptr) {
693 guarantee(failing(), "call failed to generate: calls should work");
694 return;
695 }
696 }
697
698 if (cg->is_inline()) {
699 // Accumulate has_loops estimate
700 C->env()->notice_inlined_method(cg->method());
701 }
702
703 // Reset parser state from [new_]jvms, which now carries results of the call.
704 // Return value (if any) is already pushed on the stack by the cg.
705 add_exception_states_from(new_jvms);
706 if (new_jvms->map()->control() == top()) {
707 stop_and_kill_map();
708 } else {
709 assert(new_jvms->same_calls_as(jvms), "method/bci left unchanged");
710 set_jvms(new_jvms);
711 }
712
713 assert(check_call_consistency(jvms, cg), "inconsistent info");
714
715 if (!stopped()) {
716 // This was some sort of virtual call, which did a null check for us.
717 // Now we can assert receiver-not-null, on the normal return path.
718 if (receiver != nullptr && cg->is_virtual()) {
719 Node* cast = cast_not_null(receiver);
720 // %%% assert(receiver == cast, "should already have cast the receiver");
721 }
722
723 ciType* rtype = cg->method()->return_type();
724 ciType* ctype = declared_signature->return_type();
725
726 if (Bytecodes::has_optional_appendix(iter().cur_bc_raw()) || is_signature_polymorphic) {
727 // Be careful here with return types.
728 if (ctype != rtype) {
729 BasicType rt = rtype->basic_type();
730 BasicType ct = ctype->basic_type();
731 if (ct == T_VOID) {
732 // It's OK for a method to return a value that is discarded.
733 // The discarding does not require any special action from the caller.
734 // The Java code knows this, at VerifyType.isNullConversion.
735 pop_node(rt); // whatever it was, pop it
736 } else if (rt == T_INT || is_subword_type(rt)) {
737 // Nothing. These cases are handled in lambda form bytecode.
738 assert(ct == T_INT || is_subword_type(ct), "must match: rt=%s, ct=%s", type2name(rt), type2name(ct));
739 } else if (is_reference_type(rt)) {
740 assert(is_reference_type(ct), "rt=%s, ct=%s", type2name(rt), type2name(ct));
741 if (ctype->is_loaded()) {
742 const TypeOopPtr* arg_type = TypeOopPtr::make_from_klass(rtype->as_klass());
743 const Type* sig_type = TypeOopPtr::make_from_klass(ctype->as_klass());
744 if (arg_type != nullptr && !arg_type->higher_equal(sig_type)) {
745 Node* retnode = pop();
746 Node* cast_obj = _gvn.transform(new CheckCastPPNode(control(), retnode, sig_type));
747 push(cast_obj);
748 }
749 }
750 } else {
751 assert(rt == ct, "unexpected mismatch: rt=%s, ct=%s", type2name(rt), type2name(ct));
752 // push a zero; it's better than getting an oop/int mismatch
753 pop_node(rt);
754 Node* retnode = zerocon(ct);
755 push_node(ct, retnode);
756 }
757 // Now that the value is well-behaved, continue with the call-site type.
758 rtype = ctype;
759 }
760 } else {
761 // Symbolic resolution enforces the types to be the same.
762 // NOTE: We must relax the assert for unloaded types because two
763 // different ciType instances of the same unloaded class type
764 // can appear to be "loaded" by different loaders (depending on
765 // the accessing class).
766 assert(!rtype->is_loaded() || !ctype->is_loaded() || rtype == ctype,
767 "mismatched return types: rtype=%s, ctype=%s", rtype->name(), ctype->name());
768 }
769
770 // If the return type of the method is not loaded, assert that the
771 // value we got is a null. Otherwise, we need to recompile.
772 if (!rtype->is_loaded()) {
773 if (PrintOpto && (Verbose || WizardMode)) {
774 method()->print_name(); tty->print_cr(" asserting nullness of result at bci: %d", bci());
775 cg->method()->print_name(); tty->cr();
776 }
777 if (C->log() != nullptr) {
778 C->log()->elem("assert_null reason='return' klass='%d'",
779 C->log()->identify(rtype));
780 }
781 // If there is going to be a trap, put it at the next bytecode:
782 set_bci(iter().next_bci());
783 null_assert(peek());
784 set_bci(iter().cur_bci()); // put it back
785 }
786 BasicType ct = ctype->basic_type();
787 if (is_reference_type(ct)) {
788 record_profiled_return_for_speculation();
789 }
790 }
791
792 // Restart record of parsing work after possible inlining of call
793 #ifndef PRODUCT
794 parse_histogram()->set_initial_state(bc());
795 #endif
796 }
797
798 //---------------------------catch_call_exceptions-----------------------------
799 // Put a Catch and CatchProj nodes behind a just-created call.
800 // Send their caught exceptions to the proper handler.
801 // This may be used after a call to the rethrow VM stub,
802 // when it is needed to process unloaded exception classes.
803 void Parse::catch_call_exceptions(ciExceptionHandlerStream& handlers) {
804 // Exceptions are delivered through this channel:
805 Node* i_o = this->i_o();
806
807 // Add a CatchNode.
808 Arena tmp_mem{mtCompiler};
809 GrowableArray<int> bcis(&tmp_mem, 8, 0, -1);
810 GrowableArray<const Type*> extypes(&tmp_mem, 8, 0, nullptr);
811 GrowableArray<int> saw_unloaded(&tmp_mem, 8, 0, -1);
812
813 bool default_handler = false;
814 for (; !handlers.is_done(); handlers.next()) {
815 ciExceptionHandler* h = handlers.handler();
816 int h_bci = h->handler_bci();
817 ciInstanceKlass* h_klass = h->is_catch_all() ? env()->Throwable_klass() : h->catch_klass();
818 // Do not introduce unloaded exception types into the graph:
819 if (!h_klass->is_loaded()) {
820 if (saw_unloaded.contains(h_bci)) {
821 /* We've already seen an unloaded exception with h_bci,
822 so don't duplicate. Duplication will cause the CatchNode to be
823 unnecessarily large. See 4713716. */
824 continue;
825 } else {
826 saw_unloaded.append(h_bci);
827 }
828 }
829 const Type* h_extype = TypeOopPtr::make_from_klass(h_klass);
830 // (We use make_from_klass because it respects UseUniqueSubclasses.)
831 h_extype = h_extype->join(TypeInstPtr::NOTNULL);
832 assert(!h_extype->empty(), "sanity");
833 // Note: It's OK if the BCIs repeat themselves.
834 bcis.append(h_bci);
835 extypes.append(h_extype);
836 if (h_bci == -1) {
837 default_handler = true;
838 }
839 }
840
841 if (!default_handler) {
842 bcis.append(-1);
843 const Type* extype = TypeOopPtr::make_from_klass(env()->Throwable_klass())->is_instptr();
844 extype = extype->join(TypeInstPtr::NOTNULL);
845 extypes.append(extype);
846 }
847
848 int len = bcis.length();
849 CatchNode *cn = new CatchNode(control(), i_o, len+1);
850 Node *catch_ = _gvn.transform(cn);
851
852 // now branch with the exception state to each of the (potential)
853 // handlers
854 for(int i=0; i < len; i++) {
855 // Setup JVM state to enter the handler.
856 PreserveJVMState pjvms(this);
857 // Locals are just copied from before the call.
858 // Get control from the CatchNode.
859 int handler_bci = bcis.at(i);
860 Node* ctrl = _gvn.transform( new CatchProjNode(catch_, i+1,handler_bci));
861 // This handler cannot happen?
862 if (ctrl == top()) continue;
863 set_control(ctrl);
864
865 // Create exception oop
866 const TypeInstPtr* extype = extypes.at(i)->is_instptr();
867 Node* ex_oop = _gvn.transform(new CreateExNode(extypes.at(i), ctrl, i_o));
868
869 // Handle unloaded exception classes.
870 if (saw_unloaded.contains(handler_bci)) {
871 // An unloaded exception type is coming here. Do an uncommon trap.
872 #ifndef PRODUCT
873 // We do not expect the same handler bci to take both cold unloaded
874 // and hot loaded exceptions. But, watch for it.
875 if (PrintOpto && (Verbose || WizardMode) && extype->is_loaded()) {
876 tty->print("Warning: Handler @%d takes mixed loaded/unloaded exceptions in ", bci());
877 method()->print_name(); tty->cr();
878 } else if (PrintOpto && (Verbose || WizardMode)) {
879 tty->print("Bailing out on unloaded exception type ");
880 extype->instance_klass()->print_name();
881 tty->print(" at bci:%d in ", bci());
882 method()->print_name(); tty->cr();
883 }
884 #endif
885 // Emit an uncommon trap instead of processing the block.
886 set_bci(handler_bci);
887 push_ex_oop(ex_oop);
888 uncommon_trap(Deoptimization::Reason_unloaded,
889 Deoptimization::Action_reinterpret,
890 extype->instance_klass(), "!loaded exception");
891 set_bci(iter().cur_bci()); // put it back
892 continue;
893 }
894
895 // go to the exception handler
896 if (handler_bci < 0) { // merge with corresponding rethrow node
897 throw_to_exit(make_exception_state(ex_oop));
898 } else { // Else jump to corresponding handle
899 push_ex_oop(ex_oop); // Clear stack and push just the oop.
900 merge_exception(handler_bci);
901 }
902 }
903
904 // The first CatchProj is for the normal return.
905 // (Note: If this is a call to rethrow_Java, this node goes dead.)
906 set_control(_gvn.transform( new CatchProjNode(catch_, CatchProjNode::fall_through_index, CatchProjNode::no_handler_bci)));
907 }
908
909
910 //----------------------------catch_inline_exceptions--------------------------
911 // Handle all exceptions thrown by an inlined method or individual bytecode.
912 // Common case 1: we have no handler, so all exceptions merge right into
913 // the rethrow case.
914 // Case 2: we have some handlers, with loaded exception klasses that have
915 // no subklasses. We do a Deutsch-Schiffman style type-check on the incoming
916 // exception oop and branch to the handler directly.
917 // Case 3: We have some handlers with subklasses or are not loaded at
918 // compile-time. We have to call the runtime to resolve the exception.
919 // So we insert a RethrowCall and all the logic that goes with it.
920 void Parse::catch_inline_exceptions(SafePointNode* ex_map) {
921 // Caller is responsible for saving away the map for normal control flow!
922 assert(stopped(), "call set_map(nullptr) first");
923 assert(method()->has_exception_handlers(), "don't come here w/o work to do");
924
925 Node* ex_node = saved_ex_oop(ex_map);
926 if (ex_node == top()) {
927 // No action needed.
928 return;
929 }
930 const TypeInstPtr* ex_type = _gvn.type(ex_node)->isa_instptr();
931 NOT_PRODUCT(if (ex_type==nullptr) tty->print_cr("*** Exception not InstPtr"));
932 if (ex_type == nullptr)
933 ex_type = TypeOopPtr::make_from_klass(env()->Throwable_klass())->is_instptr();
934
935 // determine potential exception handlers
936 ciExceptionHandlerStream handlers(method(), bci(),
937 ex_type->instance_klass(),
938 ex_type->klass_is_exact());
939
940 // Start executing from the given throw state. (Keep its stack, for now.)
941 // Get the exception oop as known at compile time.
942 ex_node = use_exception_state(ex_map);
943
944 // Get the exception oop klass from its header
945 Node* ex_klass_node = nullptr;
946 if (has_exception_handler() && !ex_type->klass_is_exact()) {
947 Node* p = basic_plus_adr( ex_node, ex_node, oopDesc::klass_offset_in_bytes());
948 ex_klass_node = _gvn.transform(LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeInstKlassPtr::OBJECT));
949
950 // Compute the exception klass a little more cleverly.
951 // Obvious solution is to simple do a LoadKlass from the 'ex_node'.
952 // However, if the ex_node is a PhiNode, I'm going to do a LoadKlass for
953 // each arm of the Phi. If I know something clever about the exceptions
954 // I'm loading the class from, I can replace the LoadKlass with the
955 // klass constant for the exception oop.
956 if (ex_node->is_Phi()) {
957 ex_klass_node = new PhiNode(ex_node->in(0), TypeInstKlassPtr::OBJECT);
958 for (uint i = 1; i < ex_node->req(); i++) {
959 Node* ex_in = ex_node->in(i);
960 if (ex_in == top() || ex_in == nullptr) {
961 // This path was not taken.
962 ex_klass_node->init_req(i, top());
963 continue;
964 }
965 Node* p = basic_plus_adr(ex_in, ex_in, oopDesc::klass_offset_in_bytes());
966 Node* k = _gvn.transform(LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeInstKlassPtr::OBJECT));
967 ex_klass_node->init_req( i, k );
968 }
969 ex_klass_node = _gvn.transform(ex_klass_node);
970 }
971 }
972
973 // Scan the exception table for applicable handlers.
974 // If none, we can call rethrow() and be done!
975 // If precise (loaded with no subklasses), insert a D.S. style
976 // pointer compare to the correct handler and loop back.
977 // If imprecise, switch to the Rethrow VM-call style handling.
978
979 int remaining = handlers.count_remaining();
980
981 // iterate through all entries sequentially
982 for (;!handlers.is_done(); handlers.next()) {
983 ciExceptionHandler* handler = handlers.handler();
984
985 if (handler->is_rethrow()) {
986 // If we fell off the end of the table without finding an imprecise
987 // exception klass (and without finding a generic handler) then we
988 // know this exception is not handled in this method. We just rethrow
989 // the exception into the caller.
990 throw_to_exit(make_exception_state(ex_node));
991 return;
992 }
993
994 // exception handler bci range covers throw_bci => investigate further
995 int handler_bci = handler->handler_bci();
996
997 if (remaining == 1) {
998 push_ex_oop(ex_node); // Push exception oop for handler
999 if (PrintOpto && WizardMode) {
1000 tty->print_cr(" Catching every inline exception bci:%d -> handler_bci:%d", bci(), handler_bci);
1001 }
1002 // If this is a backwards branch in the bytecodes, add safepoint
1003 maybe_add_safepoint(handler_bci);
1004 merge_exception(handler_bci); // jump to handler
1005 return; // No more handling to be done here!
1006 }
1007
1008 // Get the handler's klass
1009 ciInstanceKlass* klass = handler->catch_klass();
1010
1011 if (!klass->is_loaded()) { // klass is not loaded?
1012 // fall through into catch_call_exceptions which will emit a
1013 // handler with an uncommon trap.
1014 break;
1015 }
1016
1017 if (klass->is_interface()) // should not happen, but...
1018 break; // bail out
1019
1020 // Check the type of the exception against the catch type
1021 const TypeKlassPtr *tk = TypeKlassPtr::make(klass);
1022 Node* con = _gvn.makecon(tk);
1023 Node* not_subtype_ctrl = gen_subtype_check(ex_klass_node, con);
1024 if (!stopped()) {
1025 PreserveJVMState pjvms(this);
1026 const TypeInstPtr* tinst = TypeOopPtr::make_from_klass_unique(klass)->cast_to_ptr_type(TypePtr::NotNull)->is_instptr();
1027 assert(klass->has_subklass() || tinst->klass_is_exact(), "lost exactness");
1028 Node* ex_oop = _gvn.transform(new CheckCastPPNode(control(), ex_node, tinst));
1029 push_ex_oop(ex_oop); // Push exception oop for handler
1030 if (PrintOpto && WizardMode) {
1031 tty->print(" Catching inline exception bci:%d -> handler_bci:%d -- ", bci(), handler_bci);
1032 klass->print_name();
1033 tty->cr();
1034 }
1035 // If this is a backwards branch in the bytecodes, add safepoint
1036 maybe_add_safepoint(handler_bci);
1037 merge_exception(handler_bci);
1038 }
1039 set_control(not_subtype_ctrl);
1040
1041 // Come here if exception does not match handler.
1042 // Carry on with more handler checks.
1043 --remaining;
1044 }
1045
1046 assert(!stopped(), "you should return if you finish the chain");
1047
1048 // Oops, need to call into the VM to resolve the klasses at runtime.
1049 // Note: This call must not deoptimize, since it is not a real at this bci!
1050 kill_dead_locals();
1051
1052 make_runtime_call(RC_NO_LEAF | RC_MUST_THROW,
1053 OptoRuntime::rethrow_Type(),
1054 OptoRuntime::rethrow_stub(),
1055 nullptr, nullptr,
1056 ex_node);
1057
1058 // Rethrow is a pure call, no side effects, only a result.
1059 // The result cannot be allocated, so we use I_O
1060
1061 // Catch exceptions from the rethrow
1062 catch_call_exceptions(handlers);
1063 }
1064
1065
1066 // (Note: Moved add_debug_info into GraphKit::add_safepoint_edges.)
1067
1068
1069 #ifndef PRODUCT
1070 void Parse::count_compiled_calls(bool at_method_entry, bool is_inline) {
1071 if( CountCompiledCalls ) {
1072 if( at_method_entry ) {
1073 // bump invocation counter if top method (for statistics)
1074 if (CountCompiledCalls && depth() == 1) {
1075 const TypePtr* addr_type = TypeMetadataPtr::make(method());
1076 Node* adr1 = makecon(addr_type);
1077 Node* adr2 = basic_plus_adr(adr1, adr1, in_bytes(Method::compiled_invocation_counter_offset()));
1078 increment_counter(adr2);
1079 }
1080 } else if (is_inline) {
1081 switch (bc()) {
1082 case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_inlined_calls_addr()); break;
1083 case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_inlined_interface_calls_addr()); break;
1084 case Bytecodes::_invokestatic:
1085 case Bytecodes::_invokedynamic:
1086 case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_inlined_static_calls_addr()); break;
1087 default: fatal("unexpected call bytecode");
1088 }
1089 } else {
1090 switch (bc()) {
1091 case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_normal_calls_addr()); break;
1092 case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_interface_calls_addr()); break;
1093 case Bytecodes::_invokestatic:
1094 case Bytecodes::_invokedynamic:
1095 case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_static_calls_addr()); break;
1096 default: fatal("unexpected call bytecode");
1097 }
1098 }
1099 }
1100 }
1101 #endif //PRODUCT
1102
1103
1104 ciMethod* Compile::optimize_virtual_call(ciMethod* caller, ciInstanceKlass* klass,
1105 ciKlass* holder, ciMethod* callee,
1106 const TypeOopPtr* receiver_type, bool is_virtual,
1107 bool& call_does_dispatch, int& vtable_index,
1108 bool check_access) {
1109 // Set default values for out-parameters.
1110 call_does_dispatch = true;
1111 vtable_index = Method::invalid_vtable_index;
1112
1113 // Choose call strategy.
1114 ciMethod* optimized_virtual_method = optimize_inlining(caller, klass, holder, callee,
1115 receiver_type, check_access);
1116
1117 // Have the call been sufficiently improved such that it is no longer a virtual?
1118 if (optimized_virtual_method != nullptr) {
1119 callee = optimized_virtual_method;
1120 call_does_dispatch = false;
1121 } else if (!UseInlineCaches && is_virtual && callee->is_loaded()) {
1122 // We can make a vtable call at this site
1123 vtable_index = callee->resolve_vtable_index(caller->holder(), holder);
1124 }
1125 return callee;
1126 }
1127
1128 // Identify possible target method and inlining style
1129 ciMethod* Compile::optimize_inlining(ciMethod* caller, ciInstanceKlass* klass, ciKlass* holder,
1130 ciMethod* callee, const TypeOopPtr* receiver_type,
1131 bool check_access) {
1132 // only use for virtual or interface calls
1133
1134 // If it is obviously final, do not bother to call find_monomorphic_target,
1135 // because the class hierarchy checks are not needed, and may fail due to
1136 // incompletely loaded classes. Since we do our own class loading checks
1137 // in this module, we may confidently bind to any method.
1138 if (callee->can_be_statically_bound()) {
1139 return callee;
1140 }
1141
1142 if (receiver_type == nullptr) {
1143 return nullptr; // no receiver type info
1144 }
1145
1146 // Attempt to improve the receiver
1147 bool actual_receiver_is_exact = false;
1148 ciInstanceKlass* actual_receiver = klass;
1149 // Array methods are all inherited from Object, and are monomorphic.
1150 // finalize() call on array is not allowed.
1151 if (receiver_type->isa_aryptr() &&
1152 callee->holder() == env()->Object_klass() &&
1153 callee->name() != ciSymbols::finalize_method_name()) {
1154 return callee;
1155 }
1156
1157 // All other interesting cases are instance klasses.
1158 if (!receiver_type->isa_instptr()) {
1159 return nullptr;
1160 }
1161
1162 ciInstanceKlass* receiver_klass = receiver_type->is_instptr()->instance_klass();
1163 if (receiver_klass->is_loaded() && receiver_klass->is_initialized() && !receiver_klass->is_interface() &&
1164 (receiver_klass == actual_receiver || receiver_klass->is_subtype_of(actual_receiver))) {
1165 // ikl is a same or better type than the original actual_receiver,
1166 // e.g. static receiver from bytecodes.
1167 actual_receiver = receiver_klass;
1168 // Is the actual_receiver exact?
1169 actual_receiver_is_exact = receiver_type->klass_is_exact();
1170 }
1171
1172 ciInstanceKlass* calling_klass = caller->holder();
1173 ciMethod* cha_monomorphic_target = callee->find_monomorphic_target(calling_klass, klass, actual_receiver, check_access);
1174
1175 if (cha_monomorphic_target != nullptr) {
1176 // Hardwiring a virtual.
1177 assert(!callee->can_be_statically_bound(), "should have been handled earlier");
1178 assert(!cha_monomorphic_target->is_abstract(), "");
1179 if (!cha_monomorphic_target->can_be_statically_bound(actual_receiver)) {
1180 // If we inlined because CHA revealed only a single target method,
1181 // then we are dependent on that target method not getting overridden
1182 // by dynamic class loading. Be sure to test the "static" receiver
1183 // dest_method here, as opposed to the actual receiver, which may
1184 // falsely lead us to believe that the receiver is final or private.
1185 dependencies()->assert_unique_concrete_method(actual_receiver, cha_monomorphic_target, holder, callee);
1186 }
1187 return cha_monomorphic_target;
1188 }
1189
1190 // If the type is exact, we can still bind the method w/o a vcall.
1191 // (This case comes after CHA so we can see how much extra work it does.)
1192 if (actual_receiver_is_exact) {
1193 // In case of evolution, there is a dependence on every inlined method, since each
1194 // such method can be changed when its class is redefined.
1195 ciMethod* exact_method = callee->resolve_invoke(calling_klass, actual_receiver);
1196 if (exact_method != nullptr) {
1197 return exact_method;
1198 }
1199 }
1200
1201 return nullptr;
1202 }