1 /*
2 * Copyright (c) 1998, 2024, 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/ciCallSite.hpp"
27 #include "ci/ciMethodHandle.hpp"
28 #include "ci/ciSymbols.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "compiler/compileBroker.hpp"
31 #include "compiler/compileLog.hpp"
32 #include "interpreter/linkResolver.hpp"
33 #include "logging/log.hpp"
34 #include "logging/logLevel.hpp"
35 #include "logging/logMessage.hpp"
36 #include "logging/logStream.hpp"
37 #include "opto/addnode.hpp"
38 #include "opto/callGenerator.hpp"
39 #include "opto/castnode.hpp"
40 #include "opto/cfgnode.hpp"
41 #include "opto/mulnode.hpp"
42 #include "opto/parse.hpp"
43 #include "opto/rootnode.hpp"
44 #include "opto/runtime.hpp"
45 #include "opto/subnode.hpp"
46 #include "prims/methodHandles.hpp"
47 #include "runtime/sharedRuntime.hpp"
48 #include "utilities/macros.hpp"
49 #if INCLUDE_JFR
50 #include "jfr/jfr.hpp"
51 #endif
52
53 static void print_trace_type_profile(outputStream* out, int depth, ciKlass* prof_klass, int site_count, int receiver_count) {
54 CompileTask::print_inline_indent(depth, out);
55 out->print(" \\-> TypeProfile (%d/%d counts) = ", receiver_count, site_count);
56 prof_klass->name()->print_symbol_on(out);
57 out->cr();
58 }
59
60 static void trace_type_profile(Compile* C, ciMethod* method, int depth, int bci, ciMethod* prof_method,
61 ciKlass* prof_klass, int site_count, int receiver_count) {
62 if (TraceTypeProfile || C->print_inlining()) {
63 outputStream* out = tty;
64 if (!C->print_inlining()) {
65 if (!PrintOpto && !PrintCompilation) {
66 method->print_short_name();
67 tty->cr();
68 }
69 CompileTask::print_inlining_tty(prof_method, depth, bci, InliningResult::SUCCESS);
70 } else {
71 out = C->print_inlining_stream();
72 }
73 print_trace_type_profile(out, depth, prof_klass, site_count, receiver_count);
74 }
75
76 LogTarget(Debug, jit, inlining) lt;
77 if (lt.is_enabled()) {
78 LogStream ls(lt);
79 print_trace_type_profile(&ls, depth, prof_klass, site_count, receiver_count);
80 }
81 }
82
83 CallGenerator* Compile::call_generator(ciMethod* callee, int vtable_index, bool call_does_dispatch,
84 JVMState* jvms, bool allow_inline,
85 float prof_factor, ciKlass* speculative_receiver_type,
86 bool allow_intrinsics) {
87 assert(callee != nullptr, "failed method resolution");
88
89 ciMethod* caller = jvms->method();
90 int bci = jvms->bci();
91 Bytecodes::Code bytecode = caller->java_code_at_bci(bci);
92 ciMethod* orig_callee = caller->get_method_at_bci(bci);
93
94 const bool is_virtual_or_interface = (bytecode == Bytecodes::_invokevirtual) ||
95 (bytecode == Bytecodes::_invokeinterface) ||
96 (orig_callee->intrinsic_id() == vmIntrinsics::_linkToVirtual) ||
97 (orig_callee->intrinsic_id() == vmIntrinsics::_linkToInterface);
98
99 callee->ensure_method_data(true);
100
101 // Dtrace currently doesn't work unless all calls are vanilla
102 if (env()->dtrace_method_probes()) {
103 allow_inline = false;
104 }
105
106 // Note: When we get profiling during stage-1 compiles, we want to pull
107 // from more specific profile data which pertains to this inlining.
108 // Right now, ignore the information in jvms->caller(), and do method[bci].
109 ciCallProfile profile = caller->call_profile_at_bci(bci);
110
111 // See how many times this site has been invoked.
112 int site_count = profile.count();
113 int receiver_count = -1;
114 if (call_does_dispatch && UseTypeProfile && profile.has_receiver(0)) {
115 // Receivers in the profile structure are ordered by call counts
116 // so that the most called (major) receiver is profile.receiver(0).
117 receiver_count = profile.receiver_count(0);
118 }
119
120 CompileLog* log = this->log();
121 if (log != nullptr) {
122 int rid = (receiver_count >= 0)? log->identify(profile.receiver(0)): -1;
123 int r2id = (rid != -1 && profile.has_receiver(1))? log->identify(profile.receiver(1)):-1;
124 log->begin_elem("call method='%d' count='%d' prof_factor='%f'",
125 log->identify(callee), site_count, prof_factor);
126 if (call_does_dispatch) log->print(" virtual='1'");
127 if (allow_inline) log->print(" inline='1'");
128 if (receiver_count >= 0) {
129 log->print(" receiver='%d' receiver_count='%d'", rid, receiver_count);
130 if (profile.has_receiver(1)) {
131 log->print(" receiver2='%d' receiver2_count='%d'", r2id, profile.receiver_count(1));
132 }
133 }
134 if (callee->is_method_handle_intrinsic()) {
135 log->print(" method_handle_intrinsic='1'");
136 }
137 log->end_elem();
138 }
139
140 // Special case the handling of certain common, profitable library
141 // methods. If these methods are replaced with specialized code,
142 // then we return it as the inlined version of the call.
143 CallGenerator* cg_intrinsic = nullptr;
144 if (allow_inline && allow_intrinsics) {
145 CallGenerator* cg = find_intrinsic(callee, call_does_dispatch);
146 if (cg != nullptr) {
147 if (cg->is_predicated()) {
148 // Code without intrinsic but, hopefully, inlined.
149 CallGenerator* inline_cg = this->call_generator(callee,
150 vtable_index, call_does_dispatch, jvms, allow_inline, prof_factor, speculative_receiver_type, false);
151 if (inline_cg != nullptr) {
152 cg = CallGenerator::for_predicated_intrinsic(cg, inline_cg);
153 }
154 }
155
156 // If intrinsic does the virtual dispatch, we try to use the type profile
157 // first, and hopefully inline it as the regular virtual call below.
158 // We will retry the intrinsic if nothing had claimed it afterwards.
159 if (cg->does_virtual_dispatch()) {
160 cg_intrinsic = cg;
161 cg = nullptr;
162 } else if (IncrementalInline && should_delay_vector_inlining(callee, jvms)) {
163 return CallGenerator::for_late_inline(callee, cg);
164 } else {
165 return cg;
166 }
167 }
168 }
169
170 // Do method handle calls.
171 // NOTE: This must happen before normal inlining logic below since
172 // MethodHandle.invoke* are native methods which obviously don't
173 // have bytecodes and so normal inlining fails.
174 if (callee->is_method_handle_intrinsic()) {
175 CallGenerator* cg = CallGenerator::for_method_handle_call(jvms, caller, callee, allow_inline);
176 return cg;
177 }
178
179 // Attempt to inline...
180 if (allow_inline) {
181 // The profile data is only partly attributable to this caller,
182 // scale back the call site information.
183 float past_uses = jvms->method()->scale_count(site_count, prof_factor);
184 // This is the number of times we expect the call code to be used.
185 float expected_uses = past_uses;
186
187 // Try inlining a bytecoded method:
188 if (!call_does_dispatch) {
189 InlineTree* ilt = InlineTree::find_subtree_from_root(this->ilt(), jvms->caller(), jvms->method());
190 bool should_delay = C->should_delay_inlining();
191 if (ilt->ok_to_inline(callee, jvms, profile, should_delay)) {
192 CallGenerator* cg = CallGenerator::for_inline(callee, expected_uses);
193 // For optimized virtual calls assert at runtime that receiver object
194 // is a subtype of the inlined method holder. CHA can report a method
195 // as a unique target under an abstract method, but receiver type
196 // sometimes has a broader type. Similar scenario is possible with
197 // default methods when type system loses information about implemented
198 // interfaces.
199 if (cg != nullptr && is_virtual_or_interface && !callee->is_static()) {
200 CallGenerator* trap_cg = CallGenerator::for_uncommon_trap(callee,
201 Deoptimization::Reason_receiver_constraint, Deoptimization::Action_none);
202
203 cg = CallGenerator::for_guarded_call(callee->holder(), trap_cg, cg);
204 }
205 if (cg != nullptr) {
206 // Delay the inlining of this method to give us the
207 // opportunity to perform some high level optimizations
208 // first.
209 if (should_delay) {
210 return CallGenerator::for_late_inline(callee, cg);
211 } else if (should_delay_string_inlining(callee, jvms)) {
212 return CallGenerator::for_string_late_inline(callee, cg);
213 } else if (should_delay_boxing_inlining(callee, jvms)) {
214 return CallGenerator::for_boxing_late_inline(callee, cg);
215 } else if (should_delay_vector_reboxing_inlining(callee, jvms)) {
216 return CallGenerator::for_vector_reboxing_late_inline(callee, cg);
217 } else {
218 return cg;
219 }
220 }
221 }
222 }
223
224 // Try using the type profile.
225 if (call_does_dispatch && site_count > 0 && UseTypeProfile) {
226 // The major receiver's count >= TypeProfileMajorReceiverPercent of site_count.
227 bool have_major_receiver = profile.has_receiver(0) && (100.*profile.receiver_prob(0) >= (float)TypeProfileMajorReceiverPercent);
228 ciMethod* receiver_method = nullptr;
229
230 int morphism = profile.morphism();
231 if (speculative_receiver_type != nullptr) {
232 if (!too_many_traps_or_recompiles(caller, bci, Deoptimization::Reason_speculate_class_check)) {
233 // We have a speculative type, we should be able to resolve
234 // the call. We do that before looking at the profiling at
235 // this invoke because it may lead to bimorphic inlining which
236 // a speculative type should help us avoid.
237 receiver_method = callee->resolve_invoke(jvms->method()->holder(),
238 speculative_receiver_type);
239 if (receiver_method == nullptr) {
240 speculative_receiver_type = nullptr;
241 } else {
242 morphism = 1;
243 }
244 } else {
245 // speculation failed before. Use profiling at the call
246 // (could allow bimorphic inlining for instance).
247 speculative_receiver_type = nullptr;
248 }
249 }
250 if (receiver_method == nullptr &&
251 (have_major_receiver || morphism == 1 ||
252 (morphism == 2 && UseBimorphicInlining))) {
253 // receiver_method = profile.method();
254 // Profiles do not suggest methods now. Look it up in the major receiver.
255 receiver_method = callee->resolve_invoke(jvms->method()->holder(),
256 profile.receiver(0));
257 }
258 if (receiver_method != nullptr) {
259 // The single majority receiver sufficiently outweighs the minority.
260 CallGenerator* hit_cg = this->call_generator(receiver_method,
261 vtable_index, !call_does_dispatch, jvms, allow_inline, prof_factor);
262 if (hit_cg != nullptr) {
263 // Look up second receiver.
264 CallGenerator* next_hit_cg = nullptr;
265 ciMethod* next_receiver_method = nullptr;
266 if (morphism == 2 && UseBimorphicInlining) {
267 next_receiver_method = callee->resolve_invoke(jvms->method()->holder(),
268 profile.receiver(1));
269 if (next_receiver_method != nullptr) {
270 next_hit_cg = this->call_generator(next_receiver_method,
271 vtable_index, !call_does_dispatch, jvms,
272 allow_inline, prof_factor);
273 if (next_hit_cg != nullptr && !next_hit_cg->is_inline() &&
274 have_major_receiver && UseOnlyInlinedBimorphic) {
275 // Skip if we can't inline second receiver's method
276 next_hit_cg = nullptr;
277 }
278 }
279 }
280 CallGenerator* miss_cg;
281 Deoptimization::DeoptReason reason = (morphism == 2
282 ? Deoptimization::Reason_bimorphic
283 : Deoptimization::reason_class_check(speculative_receiver_type != nullptr));
284 if ((morphism == 1 || (morphism == 2 && next_hit_cg != nullptr)) &&
285 !too_many_traps_or_recompiles(caller, bci, reason)
286 ) {
287 // Generate uncommon trap for class check failure path
288 // in case of monomorphic or bimorphic virtual call site.
289 miss_cg = CallGenerator::for_uncommon_trap(callee, reason,
290 Deoptimization::Action_maybe_recompile);
291 } else {
292 // Generate virtual call for class check failure path
293 // in case of polymorphic virtual call site.
294 miss_cg = (IncrementalInlineVirtual ? CallGenerator::for_late_inline_virtual(callee, vtable_index, prof_factor)
295 : CallGenerator::for_virtual_call(callee, vtable_index));
296 }
297 if (miss_cg != nullptr) {
298 if (next_hit_cg != nullptr) {
299 assert(speculative_receiver_type == nullptr, "shouldn't end up here if we used speculation");
300 trace_type_profile(C, jvms->method(), jvms->depth() - 1, jvms->bci(), next_receiver_method, profile.receiver(1), site_count, profile.receiver_count(1));
301 // We don't need to record dependency on a receiver here and below.
302 // Whenever we inline, the dependency is added by Parse::Parse().
303 miss_cg = CallGenerator::for_predicted_call(profile.receiver(1), miss_cg, next_hit_cg, PROB_MAX);
304 }
305 if (miss_cg != nullptr) {
306 ciKlass* k = speculative_receiver_type != nullptr ? speculative_receiver_type : profile.receiver(0);
307 trace_type_profile(C, jvms->method(), jvms->depth() - 1, jvms->bci(), receiver_method, k, site_count, receiver_count);
308 float hit_prob = speculative_receiver_type != nullptr ? 1.0 : profile.receiver_prob(0);
309 CallGenerator* cg = CallGenerator::for_predicted_call(k, miss_cg, hit_cg, hit_prob);
310 if (cg != nullptr) return cg;
311 }
312 }
313 }
314 }
315 }
316
317 // If there is only one implementor of this interface then we
318 // may be able to bind this invoke directly to the implementing
319 // klass but we need both a dependence on the single interface
320 // and on the method we bind to. Additionally since all we know
321 // about the receiver type is that it's supposed to implement the
322 // interface we have to insert a check that it's the class we
323 // expect. Interface types are not checked by the verifier so
324 // they are roughly equivalent to Object.
325 // The number of implementors for declared_interface is less or
326 // equal to the number of implementors for target->holder() so
327 // if number of implementors of target->holder() == 1 then
328 // number of implementors for decl_interface is 0 or 1. If
329 // it's 0 then no class implements decl_interface and there's
330 // no point in inlining.
331 if (call_does_dispatch && bytecode == Bytecodes::_invokeinterface) {
332 ciInstanceKlass* declared_interface =
333 caller->get_declared_method_holder_at_bci(bci)->as_instance_klass();
334 ciInstanceKlass* singleton = declared_interface->unique_implementor();
335
336 if (singleton != nullptr) {
337 assert(singleton != declared_interface, "not a unique implementor");
338
339 ciMethod* cha_monomorphic_target =
340 callee->find_monomorphic_target(caller->holder(), declared_interface, singleton);
341
342 if (cha_monomorphic_target != nullptr &&
343 cha_monomorphic_target->holder() != env()->Object_klass()) { // subtype check against Object is useless
344 ciKlass* holder = cha_monomorphic_target->holder();
345
346 // Try to inline the method found by CHA. Inlined method is guarded by the type check.
347 CallGenerator* hit_cg = call_generator(cha_monomorphic_target,
348 vtable_index, !call_does_dispatch, jvms, allow_inline, prof_factor);
349
350 // Deoptimize on type check fail. The interpreter will throw ICCE for us.
351 CallGenerator* miss_cg = CallGenerator::for_uncommon_trap(callee,
352 Deoptimization::Reason_class_check, Deoptimization::Action_none);
353
354 ciKlass* constraint = (holder->is_subclass_of(singleton) ? holder : singleton); // avoid upcasts
355 CallGenerator* cg = CallGenerator::for_guarded_call(constraint, miss_cg, hit_cg);
356 if (hit_cg != nullptr && cg != nullptr) {
357 dependencies()->assert_unique_implementor(declared_interface, singleton);
358 dependencies()->assert_unique_concrete_method(declared_interface, cha_monomorphic_target, declared_interface, callee);
359 return cg;
360 }
361 }
362 }
363 } // call_does_dispatch && bytecode == Bytecodes::_invokeinterface
364
365 // Nothing claimed the intrinsic, we go with straight-forward inlining
366 // for already discovered intrinsic.
367 if (allow_intrinsics && cg_intrinsic != nullptr) {
368 assert(cg_intrinsic->does_virtual_dispatch(), "sanity");
369 return cg_intrinsic;
370 }
371 } // allow_inline
372
373 // There was no special inlining tactic, or it bailed out.
374 // Use a more generic tactic, like a simple call.
375 if (call_does_dispatch) {
376 const char* msg = "virtual call";
377 if (C->print_inlining()) {
378 print_inlining(callee, jvms->depth() - 1, jvms->bci(), InliningResult::FAILURE, msg);
379 }
380 C->log_inline_failure(msg);
381 if (IncrementalInlineVirtual && allow_inline) {
382 return CallGenerator::for_late_inline_virtual(callee, vtable_index, prof_factor); // attempt to inline through virtual call later
383 } else {
384 return CallGenerator::for_virtual_call(callee, vtable_index);
385 }
386 } else {
387 // Class Hierarchy Analysis or Type Profile reveals a unique target, or it is a static or special call.
388 CallGenerator* cg = CallGenerator::for_direct_call(callee, should_delay_inlining(callee, jvms));
389 // For optimized virtual calls assert at runtime that receiver object
390 // is a subtype of the method holder.
391 if (cg != nullptr && is_virtual_or_interface && !callee->is_static()) {
392 CallGenerator* trap_cg = CallGenerator::for_uncommon_trap(callee,
393 Deoptimization::Reason_receiver_constraint, Deoptimization::Action_none);
394 cg = CallGenerator::for_guarded_call(callee->holder(), trap_cg, cg);
395 }
396 return cg;
397 }
398 }
399
400 // Return true for methods that shouldn't be inlined early so that
401 // they are easier to analyze and optimize as intrinsics.
402 bool Compile::should_delay_string_inlining(ciMethod* call_method, JVMState* jvms) {
403 if (has_stringbuilder()) {
404
405 if ((call_method->holder() == C->env()->StringBuilder_klass() ||
406 call_method->holder() == C->env()->StringBuffer_klass()) &&
407 (jvms->method()->holder() == C->env()->StringBuilder_klass() ||
408 jvms->method()->holder() == C->env()->StringBuffer_klass())) {
409 // Delay SB calls only when called from non-SB code
410 return false;
411 }
412
413 switch (call_method->intrinsic_id()) {
414 case vmIntrinsics::_StringBuilder_void:
415 case vmIntrinsics::_StringBuilder_int:
416 case vmIntrinsics::_StringBuilder_String:
417 case vmIntrinsics::_StringBuilder_append_char:
418 case vmIntrinsics::_StringBuilder_append_int:
419 case vmIntrinsics::_StringBuilder_append_String:
420 case vmIntrinsics::_StringBuilder_toString:
421 case vmIntrinsics::_StringBuffer_void:
422 case vmIntrinsics::_StringBuffer_int:
423 case vmIntrinsics::_StringBuffer_String:
424 case vmIntrinsics::_StringBuffer_append_char:
425 case vmIntrinsics::_StringBuffer_append_int:
426 case vmIntrinsics::_StringBuffer_append_String:
427 case vmIntrinsics::_StringBuffer_toString:
428 case vmIntrinsics::_Integer_toString:
429 return true;
430
431 case vmIntrinsics::_String_String:
432 {
433 Node* receiver = jvms->map()->in(jvms->argoff() + 1);
434 if (receiver->is_Proj() && receiver->in(0)->is_CallStaticJava()) {
435 CallStaticJavaNode* csj = receiver->in(0)->as_CallStaticJava();
436 ciMethod* m = csj->method();
437 if (m != nullptr &&
438 (m->intrinsic_id() == vmIntrinsics::_StringBuffer_toString ||
439 m->intrinsic_id() == vmIntrinsics::_StringBuilder_toString))
440 // Delay String.<init>(new SB())
441 return true;
442 }
443 return false;
444 }
445
446 default:
447 return false;
448 }
449 }
450 return false;
451 }
452
453 bool Compile::should_delay_boxing_inlining(ciMethod* call_method, JVMState* jvms) {
454 if (eliminate_boxing() && call_method->is_boxing_method()) {
455 set_has_boxed_value(true);
456 return aggressive_unboxing();
457 }
458 return false;
459 }
460
461 bool Compile::should_delay_vector_inlining(ciMethod* call_method, JVMState* jvms) {
462 return EnableVectorSupport && call_method->is_vector_method();
463 }
464
465 bool Compile::should_delay_vector_reboxing_inlining(ciMethod* call_method, JVMState* jvms) {
466 return EnableVectorSupport && (call_method->intrinsic_id() == vmIntrinsics::_VectorRebox);
467 }
468
469 // uncommon-trap call-sites where callee is unloaded, uninitialized or will not link
470 bool Parse::can_not_compile_call_site(ciMethod *dest_method, ciInstanceKlass* klass) {
471 // Additional inputs to consider...
472 // bc = bc()
473 // caller = method()
474 // iter().get_method_holder_index()
475 assert( dest_method->is_loaded(), "ciTypeFlow should not let us get here" );
476 // Interface classes can be loaded & linked and never get around to
477 // being initialized. Uncommon-trap for not-initialized static or
478 // v-calls. Let interface calls happen.
479 ciInstanceKlass* holder_klass = dest_method->holder();
480 if (!holder_klass->is_being_initialized() &&
481 !holder_klass->is_initialized() &&
482 !holder_klass->is_interface()) {
483 uncommon_trap(Deoptimization::Reason_uninitialized,
484 Deoptimization::Action_reinterpret,
485 holder_klass);
486 return true;
487 }
488
489 assert(dest_method->is_loaded(), "dest_method: typeflow responsibility");
490 return false;
491 }
492
493 #ifdef ASSERT
494 static bool check_call_consistency(JVMState* jvms, CallGenerator* cg) {
495 ciMethod* symbolic_info = jvms->method()->get_method_at_bci(jvms->bci());
496 ciMethod* resolved_method = cg->method();
497 if (!ciMethod::is_consistent_info(symbolic_info, resolved_method)) {
498 tty->print_cr("JVMS:");
499 jvms->dump();
500 tty->print_cr("Bytecode info:");
501 jvms->method()->get_method_at_bci(jvms->bci())->print(); tty->cr();
502 tty->print_cr("Resolved method:");
503 cg->method()->print(); tty->cr();
504 return false;
505 }
506 return true;
507 }
508 #endif // ASSERT
509
510 //------------------------------do_call----------------------------------------
511 // Handle your basic call. Inline if we can & want to, else just setup call.
512 void Parse::do_call() {
513 // It's likely we are going to add debug info soon.
514 // Also, if we inline a guy who eventually needs debug info for this JVMS,
515 // our contribution to it is cleaned up right here.
516 kill_dead_locals();
517
518 C->print_inlining_assert_ready();
519
520 // Set frequently used booleans
521 const bool is_virtual = bc() == Bytecodes::_invokevirtual;
522 const bool is_virtual_or_interface = is_virtual || bc() == Bytecodes::_invokeinterface;
523 const bool has_receiver = Bytecodes::has_receiver(bc());
524
525 // Find target being called
526 bool will_link;
527 ciSignature* declared_signature = nullptr;
528 ciMethod* orig_callee = iter().get_method(will_link, &declared_signature); // callee in the bytecode
529 ciInstanceKlass* holder_klass = orig_callee->holder();
530 ciKlass* holder = iter().get_declared_method_holder();
531 ciInstanceKlass* klass = ciEnv::get_instance_klass_for_declared_method_holder(holder);
532 assert(declared_signature != nullptr, "cannot be null");
533 JFR_ONLY(Jfr::on_resolution(this, holder, orig_callee);)
534
535 // Bump max node limit for JSR292 users
536 if (bc() == Bytecodes::_invokedynamic || orig_callee->is_method_handle_intrinsic()) {
537 C->set_max_node_limit(3*MaxNodeLimit);
538 }
539
540 // uncommon-trap when callee is unloaded, uninitialized or will not link
541 // bailout when too many arguments for register representation
542 if (!will_link || can_not_compile_call_site(orig_callee, klass)) {
543 if (PrintOpto && (Verbose || WizardMode)) {
544 method()->print_name(); tty->print_cr(" can not compile call at bci %d to:", bci());
545 orig_callee->print_name(); tty->cr();
546 }
547 return;
548 }
549 assert(holder_klass->is_loaded(), "");
550 //assert((bc_callee->is_static() || is_invokedynamic) == !has_receiver , "must match bc"); // XXX invokehandle (cur_bc_raw)
551 // Note: this takes into account invokeinterface of methods declared in java/lang/Object,
552 // which should be invokevirtuals but according to the VM spec may be invokeinterfaces
553 assert(holder_klass->is_interface() || holder_klass->super() == nullptr || (bc() != Bytecodes::_invokeinterface), "must match bc");
554 // Note: In the absence of miranda methods, an abstract class K can perform
555 // an invokevirtual directly on an interface method I.m if K implements I.
556
557 // orig_callee is the resolved callee which's signature includes the
558 // appendix argument.
559 const int nargs = orig_callee->arg_size();
560 const bool is_signature_polymorphic = MethodHandles::is_signature_polymorphic(orig_callee->intrinsic_id());
561
562 // Push appendix argument (MethodType, CallSite, etc.), if one.
563 if (iter().has_appendix()) {
564 ciObject* appendix_arg = iter().get_appendix();
565 const TypeOopPtr* appendix_arg_type = TypeOopPtr::make_from_constant(appendix_arg, /* require_const= */ true);
566 Node* appendix_arg_node = _gvn.makecon(appendix_arg_type);
567 push(appendix_arg_node);
568 }
569
570 // ---------------------
571 // Does Class Hierarchy Analysis reveal only a single target of a v-call?
572 // Then we may inline or make a static call, but become dependent on there being only 1 target.
573 // Does the call-site type profile reveal only one receiver?
574 // Then we may introduce a run-time check and inline on the path where it succeeds.
575 // The other path may uncommon_trap, check for another receiver, or do a v-call.
576
577 // Try to get the most accurate receiver type
578 ciMethod* callee = orig_callee;
579 int vtable_index = Method::invalid_vtable_index;
580 bool call_does_dispatch = false;
581
582 // Speculative type of the receiver if any
583 ciKlass* speculative_receiver_type = nullptr;
584 if (is_virtual_or_interface) {
585 Node* receiver_node = stack(sp() - nargs);
586 const TypeOopPtr* receiver_type = _gvn.type(receiver_node)->isa_oopptr();
587 // call_does_dispatch and vtable_index are out-parameters. They might be changed.
588 // For arrays, klass below is Object. When vtable calls are used,
589 // resolving the call with Object would allow an illegal call to
590 // finalize() on an array. We use holder instead: illegal calls to
591 // finalize() won't be compiled as vtable calls (IC call
592 // resolution will catch the illegal call) and the few legal calls
593 // on array types won't be either.
594 callee = C->optimize_virtual_call(method(), klass, holder, orig_callee,
595 receiver_type, is_virtual,
596 call_does_dispatch, vtable_index); // out-parameters
597 speculative_receiver_type = receiver_type != nullptr ? receiver_type->speculative_type() : nullptr;
598 }
599
600 // Additional receiver subtype checks for interface calls via invokespecial or invokeinterface.
601 ciKlass* receiver_constraint = nullptr;
602 if (iter().cur_bc_raw() == Bytecodes::_invokespecial && !orig_callee->is_object_initializer()) {
603 ciInstanceKlass* calling_klass = method()->holder();
604 ciInstanceKlass* sender_klass = calling_klass;
605 if (sender_klass->is_interface()) {
606 receiver_constraint = sender_klass;
607 }
608 } else if (iter().cur_bc_raw() == Bytecodes::_invokeinterface && orig_callee->is_private()) {
609 assert(holder->is_interface(), "How did we get a non-interface method here!");
610 receiver_constraint = holder;
611 }
612
613 if (receiver_constraint != nullptr) {
614 Node* receiver_node = stack(sp() - nargs);
615 Node* cls_node = makecon(TypeKlassPtr::make(receiver_constraint, Type::trust_interfaces));
616 Node* bad_type_ctrl = nullptr;
617 Node* casted_receiver = gen_checkcast(receiver_node, cls_node, &bad_type_ctrl);
618 if (bad_type_ctrl != nullptr) {
619 PreserveJVMState pjvms(this);
620 set_control(bad_type_ctrl);
621 uncommon_trap(Deoptimization::Reason_class_check,
622 Deoptimization::Action_none);
623 }
624 if (stopped()) {
625 return; // MUST uncommon-trap?
626 }
627 set_stack(sp() - nargs, casted_receiver);
628 }
629
630 // Note: It's OK to try to inline a virtual call.
631 // The call generator will not attempt to inline a polymorphic call
632 // unless it knows how to optimize the receiver dispatch.
633 bool try_inline = (C->do_inlining() || InlineAccessors);
634
635 // ---------------------
636 dec_sp(nargs); // Temporarily pop args for JVM state of call
637 JVMState* jvms = sync_jvms();
638
639 // ---------------------
640 // Decide call tactic.
641 // This call checks with CHA, the interpreter profile, intrinsics table, etc.
642 // It decides whether inlining is desirable or not.
643 CallGenerator* cg = C->call_generator(callee, vtable_index, call_does_dispatch, jvms, try_inline, prof_factor(), speculative_receiver_type);
644
645 // NOTE: Don't use orig_callee and callee after this point! Use cg->method() instead.
646 orig_callee = callee = nullptr;
647
648 // ---------------------
649 // Round double arguments before call
650 round_double_arguments(cg->method());
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, nullptr, 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, nullptr, 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 }