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 callee->ensure_method_data(true);
106
107 // Dtrace currently doesn't work unless all calls are vanilla
108 if (env()->dtrace_method_probes()) {
109 allow_inline = false;
110 }
111
112 // Note: When we get profiling during stage-1 compiles, we want to pull
113 // from more specific profile data which pertains to this inlining.
114 // Right now, ignore the information in jvms->caller(), and do method[bci].
115 ciCallProfile profile = caller->call_profile_at_bci(bci);
116
117 // See how many times this site has been invoked.
118 int site_count = profile.count();
119 int receiver_count = -1;
120 if (call_does_dispatch && UseTypeProfile && profile.has_receiver(0)) {
121 // Receivers in the profile structure are ordered by call counts
122 // so that the most called (major) receiver is profile.receiver(0).
123 receiver_count = profile.receiver_count(0);
124 }
125
126 CompileLog* log = this->log();
127 if (log != nullptr) {
128 int rid = (receiver_count >= 0)? log->identify(profile.receiver(0)): -1;
129 int r2id = (rid != -1 && profile.has_receiver(1))? log->identify(profile.receiver(1)):-1;
130 log->begin_elem("call method='%d' count='%d' prof_factor='%f'",
131 log->identify(callee), site_count, prof_factor);
132 if (call_does_dispatch) log->print(" virtual='1'");
133 if (allow_inline) log->print(" inline='1'");
134 if (receiver_count >= 0) {
135 log->print(" receiver='%d' receiver_count='%d'", rid, receiver_count);
136 if (profile.has_receiver(1)) {
137 log->print(" receiver2='%d' receiver2_count='%d'", r2id, profile.receiver_count(1));
138 }
139 }
140 if (callee->is_method_handle_intrinsic()) {
141 log->print(" method_handle_intrinsic='1'");
142 }
143 log->end_elem();
144 }
145
146 // Special case the handling of certain common, profitable library
147 // methods. If these methods are replaced with specialized code,
148 // then we return it as the inlined version of the call.
149 CallGenerator* cg_intrinsic = nullptr;
150 if (allow_inline && allow_intrinsics) {
151 CallGenerator* cg = find_intrinsic(callee, call_does_dispatch);
152 if (cg != nullptr) {
153 if (cg->is_predicated()) {
154 // Code without intrinsic but, hopefully, inlined.
155 CallGenerator* inline_cg = this->call_generator(callee,
156 vtable_index, call_does_dispatch, jvms, allow_inline, prof_factor, speculative_receiver_type, false);
157 if (inline_cg != nullptr) {
158 cg = CallGenerator::for_predicated_intrinsic(cg, inline_cg);
159 }
160 }
161
162 // If intrinsic does the virtual dispatch, we try to use the type profile
163 // first, and hopefully inline it as the regular virtual call below.
164 // We will retry the intrinsic if nothing had claimed it afterwards.
165 if (cg->does_virtual_dispatch()) {
166 cg_intrinsic = cg;
167 cg = nullptr;
168 } else if (IncrementalInline && should_delay_vector_inlining(callee, jvms)) {
169 return CallGenerator::for_late_inline(callee, cg);
170 } else {
171 return cg;
172 }
173 }
174 }
175
176 // Do method handle calls.
177 // NOTE: This must happen before normal inlining logic below since
178 // MethodHandle.invoke* are native methods which obviously don't
179 // have bytecodes and so normal inlining fails.
180 if (callee->is_method_handle_intrinsic()) {
181 CallGenerator* cg = CallGenerator::for_method_handle_call(jvms, caller, callee, allow_inline);
182 return cg;
183 }
184
185 // Attempt to inline...
186 if (allow_inline) {
187 // The profile data is only partly attributable to this caller,
188 // scale back the call site information.
189 float past_uses = jvms->method()->scale_count(site_count, prof_factor);
190 // This is the number of times we expect the call code to be used.
191 float expected_uses = past_uses;
192
193 // Try inlining a bytecoded method:
194 if (!call_does_dispatch) {
195 InlineTree* ilt = InlineTree::find_subtree_from_root(this->ilt(), jvms->caller(), jvms->method());
196 bool should_delay = C->should_delay_inlining();
197 if (ilt->ok_to_inline(callee, jvms, profile, should_delay)) {
198 CallGenerator* cg = CallGenerator::for_inline(callee, expected_uses);
199 // For optimized virtual calls assert at runtime that receiver object
200 // is a subtype of the inlined method holder. CHA can report a method
201 // as a unique target under an abstract method, but receiver type
202 // sometimes has a broader type. Similar scenario is possible with
203 // default methods when type system loses information about implemented
204 // interfaces.
205 if (cg != nullptr && is_virtual_or_interface && !callee->is_static()) {
206 CallGenerator* trap_cg = CallGenerator::for_uncommon_trap(callee,
207 Deoptimization::Reason_receiver_constraint, Deoptimization::Action_none);
208
209 cg = CallGenerator::for_guarded_call(callee->holder(), trap_cg, cg);
210 }
211 if (cg != nullptr) {
212 // Delay the inlining of this method to give us the
213 // opportunity to perform some high level optimizations
214 // first.
215 if (should_delay) {
216 return CallGenerator::for_late_inline(callee, cg);
217 } else if (should_delay_string_inlining(callee, jvms)) {
218 return CallGenerator::for_string_late_inline(callee, cg);
219 } else if (should_delay_boxing_inlining(callee, jvms)) {
220 return CallGenerator::for_boxing_late_inline(callee, cg);
221 } else if (should_delay_vector_reboxing_inlining(callee, jvms)) {
222 return CallGenerator::for_vector_reboxing_late_inline(callee, cg);
223 } else {
224 return cg;
225 }
226 }
227 }
228 }
229
230 // Try using the type profile.
231 if (call_does_dispatch && site_count > 0 && UseTypeProfile) {
232 // The major receiver's count >= TypeProfileMajorReceiverPercent of site_count.
233 bool have_major_receiver = profile.has_receiver(0) && (100.*profile.receiver_prob(0) >= (float)TypeProfileMajorReceiverPercent);
234 ciMethod* receiver_method = nullptr;
235
236 int morphism = profile.morphism();
237 if (speculative_receiver_type != nullptr) {
238 if (!too_many_traps_or_recompiles(caller, bci, Deoptimization::Reason_speculate_class_check)) {
239 // We have a speculative type, we should be able to resolve
240 // the call. We do that before looking at the profiling at
241 // this invoke because it may lead to bimorphic inlining which
242 // a speculative type should help us avoid.
243 receiver_method = callee->resolve_invoke(jvms->method()->holder(),
244 speculative_receiver_type);
245 if (receiver_method == nullptr) {
246 speculative_receiver_type = nullptr;
247 } else {
248 morphism = 1;
249 }
250 } else {
251 // speculation failed before. Use profiling at the call
252 // (could allow bimorphic inlining for instance).
253 speculative_receiver_type = nullptr;
254 }
255 }
256 if (receiver_method == nullptr &&
257 (have_major_receiver || morphism == 1 ||
258 (morphism == 2 && UseBimorphicInlining))) {
259 // receiver_method = profile.method();
260 // Profiles do not suggest methods now. Look it up in the major receiver.
261 receiver_method = callee->resolve_invoke(jvms->method()->holder(),
262 profile.receiver(0));
263 }
264 if (receiver_method != nullptr) {
265 // The single majority receiver sufficiently outweighs the minority.
266 CallGenerator* hit_cg = this->call_generator(receiver_method,
267 vtable_index, !call_does_dispatch, jvms, allow_inline, prof_factor);
268 if (hit_cg != nullptr) {
269 // Look up second receiver.
270 CallGenerator* next_hit_cg = nullptr;
271 ciMethod* next_receiver_method = nullptr;
272 if (morphism == 2 && UseBimorphicInlining) {
273 next_receiver_method = callee->resolve_invoke(jvms->method()->holder(),
274 profile.receiver(1));
275 if (next_receiver_method != nullptr) {
276 next_hit_cg = this->call_generator(next_receiver_method,
277 vtable_index, !call_does_dispatch, jvms,
278 allow_inline, prof_factor);
279 if (next_hit_cg != nullptr && !next_hit_cg->is_inline() &&
280 have_major_receiver && UseOnlyInlinedBimorphic) {
281 // Skip if we can't inline second receiver's method
282 next_hit_cg = nullptr;
283 }
284 }
285 }
286 CallGenerator* miss_cg;
287 Deoptimization::DeoptReason reason = (morphism == 2
288 ? Deoptimization::Reason_bimorphic
289 : Deoptimization::reason_class_check(speculative_receiver_type != nullptr));
290 if ((morphism == 1 || (morphism == 2 && next_hit_cg != nullptr)) &&
291 !too_many_traps_or_recompiles(caller, bci, reason)
292 ) {
293 // Generate uncommon trap for class check failure path
294 // in case of monomorphic or bimorphic virtual call site.
295 miss_cg = CallGenerator::for_uncommon_trap(callee, reason,
296 Deoptimization::Action_maybe_recompile);
297 } else {
298 // Generate virtual call for class check failure path
299 // in case of polymorphic virtual call site.
300 miss_cg = (IncrementalInlineVirtual ? CallGenerator::for_late_inline_virtual(callee, vtable_index, prof_factor)
301 : CallGenerator::for_virtual_call(callee, vtable_index));
302 }
303 if (miss_cg != nullptr) {
304 if (next_hit_cg != nullptr) {
305 assert(speculative_receiver_type == nullptr, "shouldn't end up here if we used speculation");
306 trace_type_profile(C, jvms->method(), jvms, next_receiver_method, profile.receiver(1), site_count, profile.receiver_count(1));
307 // We don't need to record dependency on a receiver here and below.
308 // Whenever we inline, the dependency is added by Parse::Parse().
309 miss_cg = CallGenerator::for_predicted_call(profile.receiver(1), miss_cg, next_hit_cg, PROB_MAX);
310 }
311 if (miss_cg != nullptr) {
312 ciKlass* k = speculative_receiver_type != nullptr ? speculative_receiver_type : profile.receiver(0);
313 trace_type_profile(C, jvms->method(), jvms, receiver_method, k, site_count, receiver_count);
314 float hit_prob = speculative_receiver_type != nullptr ? 1.0 : profile.receiver_prob(0);
315 CallGenerator* cg = CallGenerator::for_predicted_call(k, miss_cg, hit_cg, hit_prob);
316 if (cg != nullptr) {
317 return cg;
318 }
319 }
320 }
321 }
322 }
323 }
324
325 // If there is only one implementor of this interface then we
326 // may be able to bind this invoke directly to the implementing
327 // klass but we need both a dependence on the single interface
328 // and on the method we bind to. Additionally since all we know
329 // about the receiver type is that it's supposed to implement the
330 // interface we have to insert a check that it's the class we
331 // expect. Interface types are not checked by the verifier so
332 // they are roughly equivalent to Object.
333 // The number of implementors for declared_interface is less or
334 // equal to the number of implementors for target->holder() so
335 // if number of implementors of target->holder() == 1 then
336 // number of implementors for decl_interface is 0 or 1. If
337 // it's 0 then no class implements decl_interface and there's
338 // no point in inlining.
339 if (call_does_dispatch && bytecode == Bytecodes::_invokeinterface) {
340 ciInstanceKlass* declared_interface =
341 caller->get_declared_method_holder_at_bci(bci)->as_instance_klass();
342 ciInstanceKlass* singleton = declared_interface->unique_implementor();
343
344 if (singleton != nullptr) {
345 assert(singleton != declared_interface, "not a unique implementor");
346
347 ciMethod* cha_monomorphic_target =
348 callee->find_monomorphic_target(caller->holder(), declared_interface, singleton);
349
350 if (cha_monomorphic_target != nullptr &&
351 cha_monomorphic_target->holder() != env()->Object_klass()) { // subtype check against Object is useless
352 ciKlass* holder = cha_monomorphic_target->holder();
353
354 // Try to inline the method found by CHA. Inlined method is guarded by the type check.
355 CallGenerator* hit_cg = call_generator(cha_monomorphic_target,
356 vtable_index, !call_does_dispatch, jvms, allow_inline, prof_factor);
357
358 // Deoptimize on type check fail. The interpreter will throw ICCE for us.
359 CallGenerator* miss_cg = CallGenerator::for_uncommon_trap(callee,
360 Deoptimization::Reason_class_check, Deoptimization::Action_none);
361
362 ciKlass* constraint = (holder->is_subclass_of(singleton) ? holder : singleton); // avoid upcasts
363 CallGenerator* cg = CallGenerator::for_guarded_call(constraint, miss_cg, hit_cg);
364 if (hit_cg != nullptr && cg != nullptr) {
365 dependencies()->assert_unique_implementor(declared_interface, singleton);
366 dependencies()->assert_unique_concrete_method(declared_interface, cha_monomorphic_target, declared_interface, callee);
367 return cg;
368 }
369 }
370 }
371 } // call_does_dispatch && bytecode == Bytecodes::_invokeinterface
372
373 // Nothing claimed the intrinsic, we go with straight-forward inlining
374 // for already discovered intrinsic.
375 if (allow_intrinsics && cg_intrinsic != nullptr) {
376 assert(cg_intrinsic->does_virtual_dispatch(), "sanity");
377 return cg_intrinsic;
378 }
379 } // allow_inline
380
381 // There was no special inlining tactic, or it bailed out.
382 // Use a more generic tactic, like a simple call.
383 if (call_does_dispatch) {
384 const char* msg = "virtual call";
385 C->inline_printer()->record(callee, jvms, InliningResult::FAILURE, msg);
386 C->log_inline_failure(msg);
387 if (IncrementalInlineVirtual && allow_inline) {
388 return CallGenerator::for_late_inline_virtual(callee, vtable_index, prof_factor); // attempt to inline through virtual call later
389 } else {
390 return CallGenerator::for_virtual_call(callee, vtable_index);
391 }
392 } else {
393 // Class Hierarchy Analysis or Type Profile reveals a unique target, or it is a static or special call.
394 CallGenerator* cg = CallGenerator::for_direct_call(callee, should_delay_inlining(callee, jvms));
395 // For optimized virtual calls assert at runtime that receiver object
396 // is a subtype of the method holder.
397 if (cg != nullptr && is_virtual_or_interface && !callee->is_static()) {
398 CallGenerator* trap_cg = CallGenerator::for_uncommon_trap(callee,
399 Deoptimization::Reason_receiver_constraint, Deoptimization::Action_none);
400 cg = CallGenerator::for_guarded_call(callee->holder(), trap_cg, cg);
401 }
402 return cg;
403 }
404 }
405
406 // Return true for methods that shouldn't be inlined early so that
407 // they are easier to analyze and optimize as intrinsics.
408 bool Compile::should_delay_string_inlining(ciMethod* call_method, JVMState* jvms) {
409 if (has_stringbuilder()) {
410
411 if ((call_method->holder() == C->env()->StringBuilder_klass() ||
412 call_method->holder() == C->env()->StringBuffer_klass()) &&
413 (jvms->method()->holder() == C->env()->StringBuilder_klass() ||
414 jvms->method()->holder() == C->env()->StringBuffer_klass())) {
415 // Delay SB calls only when called from non-SB code
416 return false;
417 }
418
419 switch (call_method->intrinsic_id()) {
420 case vmIntrinsics::_StringBuilder_void:
421 case vmIntrinsics::_StringBuilder_int:
422 case vmIntrinsics::_StringBuilder_String:
423 case vmIntrinsics::_StringBuilder_append_char:
424 case vmIntrinsics::_StringBuilder_append_int:
425 case vmIntrinsics::_StringBuilder_append_String:
426 case vmIntrinsics::_StringBuilder_toString:
427 case vmIntrinsics::_StringBuffer_void:
428 case vmIntrinsics::_StringBuffer_int:
429 case vmIntrinsics::_StringBuffer_String:
430 case vmIntrinsics::_StringBuffer_append_char:
431 case vmIntrinsics::_StringBuffer_append_int:
432 case vmIntrinsics::_StringBuffer_append_String:
433 case vmIntrinsics::_StringBuffer_toString:
434 case vmIntrinsics::_Integer_toString:
435 return true;
436
437 case vmIntrinsics::_String_String:
438 {
439 Node* receiver = jvms->map()->in(jvms->argoff() + 1);
440 if (receiver->is_Proj() && receiver->in(0)->is_CallStaticJava()) {
441 CallStaticJavaNode* csj = receiver->in(0)->as_CallStaticJava();
442 ciMethod* m = csj->method();
443 if (m != nullptr &&
444 (m->intrinsic_id() == vmIntrinsics::_StringBuffer_toString ||
445 m->intrinsic_id() == vmIntrinsics::_StringBuilder_toString))
446 // Delay String.<init>(new SB())
447 return true;
448 }
449 return false;
450 }
451
452 default:
453 return false;
454 }
455 }
456 return false;
457 }
458
459 bool Compile::should_delay_boxing_inlining(ciMethod* call_method, JVMState* jvms) {
460 if (eliminate_boxing() && call_method->is_boxing_method()) {
461 set_has_boxed_value(true);
462 return aggressive_unboxing();
463 }
464 return false;
465 }
466
467 bool Compile::should_delay_vector_inlining(ciMethod* call_method, JVMState* jvms) {
468 return EnableVectorSupport && call_method->is_vector_method();
469 }
470
471 bool Compile::should_delay_vector_reboxing_inlining(ciMethod* call_method, JVMState* jvms) {
472 return EnableVectorSupport && (call_method->intrinsic_id() == vmIntrinsics::_VectorRebox);
473 }
474
475 // uncommon-trap call-sites where callee is unloaded, uninitialized or will not link
476 bool Parse::can_not_compile_call_site(ciMethod *dest_method, ciInstanceKlass* klass) {
477 // Additional inputs to consider...
478 // bc = bc()
479 // caller = method()
480 // iter().get_method_holder_index()
481 assert( dest_method->is_loaded(), "ciTypeFlow should not let us get here" );
482 // Interface classes can be loaded & linked and never get around to
483 // being initialized. Uncommon-trap for not-initialized static or
484 // v-calls. Let interface calls happen.
485 ciInstanceKlass* holder_klass = dest_method->holder();
486 if (!holder_klass->is_being_initialized() &&
487 !holder_klass->is_initialized() &&
488 !holder_klass->is_interface()) {
489 uncommon_trap(Deoptimization::Reason_uninitialized,
490 Deoptimization::Action_reinterpret,
491 holder_klass);
492 return true;
493 }
494
495 assert(dest_method->is_loaded(), "dest_method: typeflow responsibility");
496 return false;
497 }
498
499 #ifdef ASSERT
500 static bool check_call_consistency(JVMState* jvms, CallGenerator* cg) {
501 ciMethod* symbolic_info = jvms->method()->get_method_at_bci(jvms->bci());
502 ciMethod* resolved_method = cg->method();
503 if (!ciMethod::is_consistent_info(symbolic_info, resolved_method)) {
504 tty->print_cr("JVMS:");
505 jvms->dump();
506 tty->print_cr("Bytecode info:");
507 jvms->method()->get_method_at_bci(jvms->bci())->print(); tty->cr();
508 tty->print_cr("Resolved method:");
509 cg->method()->print(); tty->cr();
510 return false;
511 }
512 return true;
513 }
514 #endif // ASSERT
515
516 //------------------------------do_call----------------------------------------
517 // Handle your basic call. Inline if we can & want to, else just setup call.
518 void Parse::do_call() {
519 // It's likely we are going to add debug info soon.
520 // Also, if we inline a guy who eventually needs debug info for this JVMS,
521 // our contribution to it is cleaned up right here.
522 kill_dead_locals();
523
524 // Set frequently used booleans
525 const bool is_virtual = bc() == Bytecodes::_invokevirtual;
526 const bool is_virtual_or_interface = is_virtual || bc() == Bytecodes::_invokeinterface;
527 const bool has_receiver = Bytecodes::has_receiver(bc());
528
529 // Find target being called
530 bool will_link;
531 ciSignature* declared_signature = nullptr;
532 ciMethod* orig_callee = iter().get_method(will_link, &declared_signature); // callee in the bytecode
533 ciInstanceKlass* holder_klass = orig_callee->holder();
534 ciKlass* holder = iter().get_declared_method_holder();
535 ciInstanceKlass* klass = ciEnv::get_instance_klass_for_declared_method_holder(holder);
536 assert(declared_signature != nullptr, "cannot be null");
537 JFR_ONLY(Jfr::on_resolution(this, holder, orig_callee);)
538
539 // Bump max node limit for JSR292 users
540 if (bc() == Bytecodes::_invokedynamic || orig_callee->is_method_handle_intrinsic()) {
541 C->set_max_node_limit(3*MaxNodeLimit);
542 }
543
544 // uncommon-trap when callee is unloaded, uninitialized or will not link
545 // bailout when too many arguments for register representation
546 if (!will_link || can_not_compile_call_site(orig_callee, klass)) {
547 if (PrintOpto && (Verbose || WizardMode)) {
548 method()->print_name(); tty->print_cr(" can not compile call at bci %d to:", bci());
549 orig_callee->print_name(); tty->cr();
550 }
551 return;
552 }
553 assert(holder_klass->is_loaded(), "");
554 //assert((bc_callee->is_static() || is_invokedynamic) == !has_receiver , "must match bc"); // XXX invokehandle (cur_bc_raw)
555 // Note: this takes into account invokeinterface of methods declared in java/lang/Object,
556 // which should be invokevirtuals but according to the VM spec may be invokeinterfaces
557 assert(holder_klass->is_interface() || holder_klass->super() == nullptr || (bc() != Bytecodes::_invokeinterface), "must match bc");
558 // Note: In the absence of miranda methods, an abstract class K can perform
559 // an invokevirtual directly on an interface method I.m if K implements I.
560
561 // orig_callee is the resolved callee which's signature includes the
562 // appendix argument.
563 const int nargs = orig_callee->arg_size();
564 const bool is_signature_polymorphic = MethodHandles::is_signature_polymorphic(orig_callee->intrinsic_id());
565
566 // Push appendix argument (MethodType, CallSite, etc.), if one.
567 if (iter().has_appendix()) {
568 ciObject* appendix_arg = iter().get_appendix();
569 const TypeOopPtr* appendix_arg_type = TypeOopPtr::make_from_constant(appendix_arg, /* require_const= */ true);
570 Node* appendix_arg_node = _gvn.makecon(appendix_arg_type);
571 push(appendix_arg_node);
572 }
573
574 // ---------------------
575 // Does Class Hierarchy Analysis reveal only a single target of a v-call?
576 // Then we may inline or make a static call, but become dependent on there being only 1 target.
577 // Does the call-site type profile reveal only one receiver?
578 // Then we may introduce a run-time check and inline on the path where it succeeds.
579 // The other path may uncommon_trap, check for another receiver, or do a v-call.
580
581 // Try to get the most accurate receiver type
582 ciMethod* callee = orig_callee;
583 int vtable_index = Method::invalid_vtable_index;
584 bool call_does_dispatch = false;
585
586 // Speculative type of the receiver if any
587 ciKlass* speculative_receiver_type = nullptr;
588 if (is_virtual_or_interface) {
589 Node* receiver_node = stack(sp() - nargs);
590 const TypeOopPtr* receiver_type = _gvn.type(receiver_node)->isa_oopptr();
591 // call_does_dispatch and vtable_index are out-parameters. They might be changed.
592 // For arrays, klass below is Object. When vtable calls are used,
593 // resolving the call with Object would allow an illegal call to
594 // finalize() on an array. We use holder instead: illegal calls to
595 // finalize() won't be compiled as vtable calls (IC call
596 // resolution will catch the illegal call) and the few legal calls
597 // on array types won't be either.
598 callee = C->optimize_virtual_call(method(), klass, holder, orig_callee,
599 receiver_type, is_virtual,
600 call_does_dispatch, vtable_index); // out-parameters
601 speculative_receiver_type = receiver_type != nullptr ? receiver_type->speculative_type() : nullptr;
602 }
603
604 // Additional receiver subtype checks for interface calls via invokespecial or invokeinterface.
605 ciKlass* receiver_constraint = nullptr;
606 if (iter().cur_bc_raw() == Bytecodes::_invokespecial && !orig_callee->is_object_initializer()) {
607 ciInstanceKlass* calling_klass = method()->holder();
608 ciInstanceKlass* sender_klass = calling_klass;
609 if (sender_klass->is_interface()) {
610 receiver_constraint = sender_klass;
611 }
612 } else if (iter().cur_bc_raw() == Bytecodes::_invokeinterface && orig_callee->is_private()) {
613 assert(holder->is_interface(), "How did we get a non-interface method here!");
614 receiver_constraint = holder;
615 }
616
617 if (receiver_constraint != nullptr) {
618 Node* receiver_node = stack(sp() - nargs);
619 Node* cls_node = makecon(TypeKlassPtr::make(receiver_constraint, Type::trust_interfaces));
620 Node* bad_type_ctrl = nullptr;
621 Node* casted_receiver = gen_checkcast(receiver_node, cls_node, &bad_type_ctrl);
622 if (bad_type_ctrl != nullptr) {
623 PreserveJVMState pjvms(this);
624 set_control(bad_type_ctrl);
625 uncommon_trap(Deoptimization::Reason_class_check,
626 Deoptimization::Action_none);
627 }
628 if (stopped()) {
629 return; // MUST uncommon-trap?
630 }
631 set_stack(sp() - nargs, casted_receiver);
632 }
633
634 // Note: It's OK to try to inline a virtual call.
635 // The call generator will not attempt to inline a polymorphic call
636 // unless it knows how to optimize the receiver dispatch.
637 bool try_inline = (C->do_inlining() || InlineAccessors);
638
639 // ---------------------
640 dec_sp(nargs); // Temporarily pop args for JVM state of call
641 JVMState* jvms = sync_jvms();
642
643 // ---------------------
644 // Decide call tactic.
645 // This call checks with CHA, the interpreter profile, intrinsics table, etc.
646 // It decides whether inlining is desirable or not.
647 CallGenerator* cg = C->call_generator(callee, vtable_index, call_does_dispatch, jvms, try_inline, prof_factor(), speculative_receiver_type);
648
649 // NOTE: Don't use orig_callee and callee after this point! Use cg->method() instead.
650 orig_callee = callee = nullptr;
651
652 // ---------------------
653
654 // Feed profiling data for arguments to the type system so it can
655 // propagate it as speculative types
656 record_profiled_arguments_for_speculation(cg->method(), bc());
657
658 #ifndef PRODUCT
659 // bump global counters for calls
660 count_compiled_calls(/*at_method_entry*/ false, cg->is_inline());
661
662 // Record first part of parsing work for this call
663 parse_histogram()->record_change();
664 #endif // not PRODUCT
665
666 assert(jvms == this->jvms(), "still operating on the right JVMS");
667 assert(jvms_in_sync(), "jvms must carry full info into CG");
668
669 // save across call, for a subsequent cast_not_null.
670 Node* receiver = has_receiver ? argument(0) : nullptr;
671
672 // The extra CheckCastPPs for speculative types mess with PhaseStringOpts
673 if (receiver != nullptr && !call_does_dispatch && !cg->is_string_late_inline()) {
674 // Feed profiling data for a single receiver to the type system so
675 // it can propagate it as a speculative type
676 receiver = record_profiled_receiver_for_speculation(receiver);
677 }
678
679 JVMState* new_jvms = cg->generate(jvms);
680 if (new_jvms == nullptr) {
681 // When inlining attempt fails (e.g., too many arguments),
682 // it may contaminate the current compile state, making it
683 // impossible to pull back and try again. Once we call
684 // cg->generate(), we are committed. If it fails, the whole
685 // compilation task is compromised.
686 if (failing()) return;
687
688 // This can happen if a library intrinsic is available, but refuses
689 // the call site, perhaps because it did not match a pattern the
690 // intrinsic was expecting to optimize. Should always be possible to
691 // get a normal java call that may inline in that case
692 cg = C->call_generator(cg->method(), vtable_index, call_does_dispatch, jvms, try_inline, prof_factor(), speculative_receiver_type, /* allow_intrinsics= */ false);
693 new_jvms = cg->generate(jvms);
694 if (new_jvms == nullptr) {
695 guarantee(failing(), "call failed to generate: calls should work");
696 return;
697 }
698 }
699
700 if (cg->is_inline()) {
701 // Accumulate has_loops estimate
702 C->env()->notice_inlined_method(cg->method());
703 }
704
705 // Reset parser state from [new_]jvms, which now carries results of the call.
706 // Return value (if any) is already pushed on the stack by the cg.
707 add_exception_states_from(new_jvms);
708 if (new_jvms->map()->control() == top()) {
709 stop_and_kill_map();
710 } else {
711 assert(new_jvms->same_calls_as(jvms), "method/bci left unchanged");
712 set_jvms(new_jvms);
713 }
714
715 assert(check_call_consistency(jvms, cg), "inconsistent info");
716
717 if (!stopped()) {
718 // This was some sort of virtual call, which did a null check for us.
719 // Now we can assert receiver-not-null, on the normal return path.
720 if (receiver != nullptr && cg->is_virtual()) {
721 Node* cast = cast_not_null(receiver);
722 // %%% assert(receiver == cast, "should already have cast the receiver");
723 }
724
725 ciType* rtype = cg->method()->return_type();
726 ciType* ctype = declared_signature->return_type();
727
728 if (Bytecodes::has_optional_appendix(iter().cur_bc_raw()) || is_signature_polymorphic) {
729 // Be careful here with return types.
730 if (ctype != rtype) {
731 BasicType rt = rtype->basic_type();
732 BasicType ct = ctype->basic_type();
733 if (ct == T_VOID) {
734 // It's OK for a method to return a value that is discarded.
735 // The discarding does not require any special action from the caller.
736 // The Java code knows this, at VerifyType.isNullConversion.
737 pop_node(rt); // whatever it was, pop it
738 } else if (rt == T_INT || is_subword_type(rt)) {
739 // Nothing. These cases are handled in lambda form bytecode.
740 assert(ct == T_INT || is_subword_type(ct), "must match: rt=%s, ct=%s", type2name(rt), type2name(ct));
741 } else if (is_reference_type(rt)) {
742 assert(is_reference_type(ct), "rt=%s, ct=%s", type2name(rt), type2name(ct));
743 if (ctype->is_loaded()) {
744 const TypeOopPtr* arg_type = TypeOopPtr::make_from_klass(rtype->as_klass());
745 const Type* sig_type = TypeOopPtr::make_from_klass(ctype->as_klass());
746 if (arg_type != nullptr && !arg_type->higher_equal(sig_type)) {
747 Node* retnode = pop();
748 Node* cast_obj = _gvn.transform(new CheckCastPPNode(control(), retnode, sig_type));
749 push(cast_obj);
750 }
751 }
752 } else {
753 assert(rt == ct, "unexpected mismatch: rt=%s, ct=%s", type2name(rt), type2name(ct));
754 // push a zero; it's better than getting an oop/int mismatch
755 pop_node(rt);
756 Node* retnode = zerocon(ct);
757 push_node(ct, retnode);
758 }
759 // Now that the value is well-behaved, continue with the call-site type.
760 rtype = ctype;
761 }
762 } else {
763 // Symbolic resolution enforces the types to be the same.
764 // NOTE: We must relax the assert for unloaded types because two
765 // different ciType instances of the same unloaded class type
766 // can appear to be "loaded" by different loaders (depending on
767 // the accessing class).
768 assert(!rtype->is_loaded() || !ctype->is_loaded() || rtype == ctype,
769 "mismatched return types: rtype=%s, ctype=%s", rtype->name(), ctype->name());
770 }
771
772 // If the return type of the method is not loaded, assert that the
773 // value we got is a null. Otherwise, we need to recompile.
774 if (!rtype->is_loaded()) {
775 if (PrintOpto && (Verbose || WizardMode)) {
776 method()->print_name(); tty->print_cr(" asserting nullness of result at bci: %d", bci());
777 cg->method()->print_name(); tty->cr();
778 }
779 if (C->log() != nullptr) {
780 C->log()->elem("assert_null reason='return' klass='%d'",
781 C->log()->identify(rtype));
782 }
783 // If there is going to be a trap, put it at the next bytecode:
784 set_bci(iter().next_bci());
785 null_assert(peek());
786 set_bci(iter().cur_bci()); // put it back
787 }
788 BasicType ct = ctype->basic_type();
789 if (is_reference_type(ct)) {
790 record_profiled_return_for_speculation();
791 }
792 }
793
794 // Restart record of parsing work after possible inlining of call
795 #ifndef PRODUCT
796 parse_histogram()->set_initial_state(bc());
797 #endif
798 }
799
800 //---------------------------catch_call_exceptions-----------------------------
801 // Put a Catch and CatchProj nodes behind a just-created call.
802 // Send their caught exceptions to the proper handler.
803 // This may be used after a call to the rethrow VM stub,
804 // when it is needed to process unloaded exception classes.
805 void Parse::catch_call_exceptions(ciExceptionHandlerStream& handlers) {
806 // Exceptions are delivered through this channel:
807 Node* i_o = this->i_o();
808
809 // Add a CatchNode.
810 Arena tmp_mem{mtCompiler};
811 GrowableArray<int> bcis(&tmp_mem, 8, 0, -1);
812 GrowableArray<const Type*> extypes(&tmp_mem, 8, 0, nullptr);
813 GrowableArray<int> saw_unloaded(&tmp_mem, 8, 0, -1);
814
815 bool default_handler = false;
816 for (; !handlers.is_done(); handlers.next()) {
817 ciExceptionHandler* h = handlers.handler();
818 int h_bci = h->handler_bci();
819 ciInstanceKlass* h_klass = h->is_catch_all() ? env()->Throwable_klass() : h->catch_klass();
820 // Do not introduce unloaded exception types into the graph:
821 if (!h_klass->is_loaded()) {
822 if (saw_unloaded.contains(h_bci)) {
823 /* We've already seen an unloaded exception with h_bci,
824 so don't duplicate. Duplication will cause the CatchNode to be
825 unnecessarily large. See 4713716. */
826 continue;
827 } else {
828 saw_unloaded.append(h_bci);
829 }
830 }
831 const Type* h_extype = TypeOopPtr::make_from_klass(h_klass);
832 // (We use make_from_klass because it respects UseUniqueSubclasses.)
833 h_extype = h_extype->join(TypeInstPtr::NOTNULL);
834 assert(!h_extype->empty(), "sanity");
835 // Note: It's OK if the BCIs repeat themselves.
836 bcis.append(h_bci);
837 extypes.append(h_extype);
838 if (h_bci == -1) {
839 default_handler = true;
840 }
841 }
842
843 if (!default_handler) {
844 bcis.append(-1);
845 const Type* extype = TypeOopPtr::make_from_klass(env()->Throwable_klass())->is_instptr();
846 extype = extype->join(TypeInstPtr::NOTNULL);
847 extypes.append(extype);
848 }
849
850 int len = bcis.length();
851 CatchNode *cn = new CatchNode(control(), i_o, len+1);
852 Node *catch_ = _gvn.transform(cn);
853
854 // now branch with the exception state to each of the (potential)
855 // handlers
856 for(int i=0; i < len; i++) {
857 // Setup JVM state to enter the handler.
858 PreserveJVMState pjvms(this);
859 // Locals are just copied from before the call.
860 // Get control from the CatchNode.
861 int handler_bci = bcis.at(i);
862 Node* ctrl = _gvn.transform( new CatchProjNode(catch_, i+1,handler_bci));
863 // This handler cannot happen?
864 if (ctrl == top()) continue;
865 set_control(ctrl);
866
867 // Create exception oop
868 const TypeInstPtr* extype = extypes.at(i)->is_instptr();
869 Node* ex_oop = _gvn.transform(new CreateExNode(extypes.at(i), ctrl, i_o));
870
871 // Handle unloaded exception classes.
872 if (saw_unloaded.contains(handler_bci)) {
873 // An unloaded exception type is coming here. Do an uncommon trap.
874 #ifndef PRODUCT
875 // We do not expect the same handler bci to take both cold unloaded
876 // and hot loaded exceptions. But, watch for it.
877 if (PrintOpto && (Verbose || WizardMode) && extype->is_loaded()) {
878 tty->print("Warning: Handler @%d takes mixed loaded/unloaded exceptions in ", bci());
879 method()->print_name(); tty->cr();
880 } else if (PrintOpto && (Verbose || WizardMode)) {
881 tty->print("Bailing out on unloaded exception type ");
882 extype->instance_klass()->print_name();
883 tty->print(" at bci:%d in ", bci());
884 method()->print_name(); tty->cr();
885 }
886 #endif
887 // Emit an uncommon trap instead of processing the block.
888 set_bci(handler_bci);
889 push_ex_oop(ex_oop);
890 uncommon_trap(Deoptimization::Reason_unloaded,
891 Deoptimization::Action_reinterpret,
892 extype->instance_klass(), "!loaded exception");
893 set_bci(iter().cur_bci()); // put it back
894 continue;
895 }
896
897 // go to the exception handler
898 if (handler_bci < 0) { // merge with corresponding rethrow node
899 throw_to_exit(make_exception_state(ex_oop));
900 } else { // Else jump to corresponding handle
901 push_ex_oop(ex_oop); // Clear stack and push just the oop.
902 merge_exception(handler_bci);
903 }
904 }
905
906 // The first CatchProj is for the normal return.
907 // (Note: If this is a call to rethrow_Java, this node goes dead.)
908 set_control(_gvn.transform( new CatchProjNode(catch_, CatchProjNode::fall_through_index, CatchProjNode::no_handler_bci)));
909 }
910
911
912 //----------------------------catch_inline_exceptions--------------------------
913 // Handle all exceptions thrown by an inlined method or individual bytecode.
914 // Common case 1: we have no handler, so all exceptions merge right into
915 // the rethrow case.
916 // Case 2: we have some handlers, with loaded exception klasses that have
917 // no subklasses. We do a Deutsch-Schiffman style type-check on the incoming
918 // exception oop and branch to the handler directly.
919 // Case 3: We have some handlers with subklasses or are not loaded at
920 // compile-time. We have to call the runtime to resolve the exception.
921 // So we insert a RethrowCall and all the logic that goes with it.
922 void Parse::catch_inline_exceptions(SafePointNode* ex_map) {
923 // Caller is responsible for saving away the map for normal control flow!
924 assert(stopped(), "call set_map(nullptr) first");
925 assert(method()->has_exception_handlers(), "don't come here w/o work to do");
926
927 Node* ex_node = saved_ex_oop(ex_map);
928 if (ex_node == top()) {
929 // No action needed.
930 return;
931 }
932 const TypeInstPtr* ex_type = _gvn.type(ex_node)->isa_instptr();
933 NOT_PRODUCT(if (ex_type==nullptr) tty->print_cr("*** Exception not InstPtr"));
934 if (ex_type == nullptr)
935 ex_type = TypeOopPtr::make_from_klass(env()->Throwable_klass())->is_instptr();
936
937 // determine potential exception handlers
938 ciExceptionHandlerStream handlers(method(), bci(),
939 ex_type->instance_klass(),
940 ex_type->klass_is_exact());
941
942 // Start executing from the given throw state. (Keep its stack, for now.)
943 // Get the exception oop as known at compile time.
944 ex_node = use_exception_state(ex_map);
945
946 // Get the exception oop klass from its header
947 Node* ex_klass_node = nullptr;
948 if (has_exception_handler() && !ex_type->klass_is_exact()) {
949 Node* p = basic_plus_adr( ex_node, ex_node, oopDesc::klass_offset_in_bytes());
950 ex_klass_node = _gvn.transform(LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeInstKlassPtr::OBJECT));
951
952 // Compute the exception klass a little more cleverly.
953 // Obvious solution is to simple do a LoadKlass from the 'ex_node'.
954 // However, if the ex_node is a PhiNode, I'm going to do a LoadKlass for
955 // each arm of the Phi. If I know something clever about the exceptions
956 // I'm loading the class from, I can replace the LoadKlass with the
957 // klass constant for the exception oop.
958 if (ex_node->is_Phi()) {
959 ex_klass_node = new PhiNode(ex_node->in(0), TypeInstKlassPtr::OBJECT);
960 for (uint i = 1; i < ex_node->req(); i++) {
961 Node* ex_in = ex_node->in(i);
962 if (ex_in == top() || ex_in == nullptr) {
963 // This path was not taken.
964 ex_klass_node->init_req(i, top());
965 continue;
966 }
967 Node* p = basic_plus_adr(ex_in, ex_in, oopDesc::klass_offset_in_bytes());
968 Node* k = _gvn.transform(LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeInstKlassPtr::OBJECT));
969 ex_klass_node->init_req( i, k );
970 }
971 ex_klass_node = _gvn.transform(ex_klass_node);
972 }
973 }
974
975 // Scan the exception table for applicable handlers.
976 // If none, we can call rethrow() and be done!
977 // If precise (loaded with no subklasses), insert a D.S. style
978 // pointer compare to the correct handler and loop back.
979 // If imprecise, switch to the Rethrow VM-call style handling.
980
981 int remaining = handlers.count_remaining();
982
983 // iterate through all entries sequentially
984 for (;!handlers.is_done(); handlers.next()) {
985 ciExceptionHandler* handler = handlers.handler();
986
987 if (handler->is_rethrow()) {
988 // If we fell off the end of the table without finding an imprecise
989 // exception klass (and without finding a generic handler) then we
990 // know this exception is not handled in this method. We just rethrow
991 // the exception into the caller.
992 throw_to_exit(make_exception_state(ex_node));
993 return;
994 }
995
996 // exception handler bci range covers throw_bci => investigate further
997 int handler_bci = handler->handler_bci();
998
999 if (remaining == 1) {
1000 push_ex_oop(ex_node); // Push exception oop for handler
1001 if (PrintOpto && WizardMode) {
1002 tty->print_cr(" Catching every inline exception bci:%d -> handler_bci:%d", bci(), handler_bci);
1003 }
1004 // If this is a backwards branch in the bytecodes, add safepoint
1005 maybe_add_safepoint(handler_bci);
1006 merge_exception(handler_bci); // jump to handler
1007 return; // No more handling to be done here!
1008 }
1009
1010 // Get the handler's klass
1011 ciInstanceKlass* klass = handler->catch_klass();
1012
1013 if (!klass->is_loaded()) { // klass is not loaded?
1014 // fall through into catch_call_exceptions which will emit a
1015 // handler with an uncommon trap.
1016 break;
1017 }
1018
1019 if (klass->is_interface()) // should not happen, but...
1020 break; // bail out
1021
1022 // Check the type of the exception against the catch type
1023 const TypeKlassPtr *tk = TypeKlassPtr::make(klass);
1024 Node* con = _gvn.makecon(tk);
1025 Node* not_subtype_ctrl = gen_subtype_check(ex_klass_node, con);
1026 if (!stopped()) {
1027 PreserveJVMState pjvms(this);
1028 const TypeInstPtr* tinst = TypeOopPtr::make_from_klass_unique(klass)->cast_to_ptr_type(TypePtr::NotNull)->is_instptr();
1029 assert(klass->has_subklass() || tinst->klass_is_exact(), "lost exactness");
1030 Node* ex_oop = _gvn.transform(new CheckCastPPNode(control(), ex_node, tinst));
1031 push_ex_oop(ex_oop); // Push exception oop for handler
1032 if (PrintOpto && WizardMode) {
1033 tty->print(" Catching inline exception bci:%d -> handler_bci:%d -- ", bci(), handler_bci);
1034 klass->print_name();
1035 tty->cr();
1036 }
1037 // If this is a backwards branch in the bytecodes, add safepoint
1038 maybe_add_safepoint(handler_bci);
1039 merge_exception(handler_bci);
1040 }
1041 set_control(not_subtype_ctrl);
1042
1043 // Come here if exception does not match handler.
1044 // Carry on with more handler checks.
1045 --remaining;
1046 }
1047
1048 assert(!stopped(), "you should return if you finish the chain");
1049
1050 // Oops, need to call into the VM to resolve the klasses at runtime.
1051 // Note: This call must not deoptimize, since it is not a real at this bci!
1052 kill_dead_locals();
1053
1054 make_runtime_call(RC_NO_LEAF | RC_MUST_THROW,
1055 OptoRuntime::rethrow_Type(),
1056 OptoRuntime::rethrow_stub(),
1057 nullptr, nullptr,
1058 ex_node);
1059
1060 // Rethrow is a pure call, no side effects, only a result.
1061 // The result cannot be allocated, so we use I_O
1062
1063 // Catch exceptions from the rethrow
1064 catch_call_exceptions(handlers);
1065 }
1066
1067
1068 // (Note: Moved add_debug_info into GraphKit::add_safepoint_edges.)
1069
1070
1071 #ifndef PRODUCT
1072 void Parse::count_compiled_calls(bool at_method_entry, bool is_inline) {
1073 if( CountCompiledCalls ) {
1074 if( at_method_entry ) {
1075 // bump invocation counter if top method (for statistics)
1076 if (CountCompiledCalls && depth() == 1) {
1077 const TypePtr* addr_type = TypeMetadataPtr::make(method());
1078 Node* adr1 = makecon(addr_type);
1079 Node* adr2 = basic_plus_adr(adr1, adr1, in_bytes(Method::compiled_invocation_counter_offset()));
1080 increment_counter(adr2);
1081 }
1082 } else if (is_inline) {
1083 switch (bc()) {
1084 case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_inlined_calls_addr()); break;
1085 case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_inlined_interface_calls_addr()); break;
1086 case Bytecodes::_invokestatic:
1087 case Bytecodes::_invokedynamic:
1088 case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_inlined_static_calls_addr()); break;
1089 default: fatal("unexpected call bytecode");
1090 }
1091 } else {
1092 switch (bc()) {
1093 case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_normal_calls_addr()); break;
1094 case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_interface_calls_addr()); break;
1095 case Bytecodes::_invokestatic:
1096 case Bytecodes::_invokedynamic:
1097 case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_static_calls_addr()); break;
1098 default: fatal("unexpected call bytecode");
1099 }
1100 }
1101 }
1102 }
1103 #endif //PRODUCT
1104
1105
1106 ciMethod* Compile::optimize_virtual_call(ciMethod* caller, ciInstanceKlass* klass,
1107 ciKlass* holder, ciMethod* callee,
1108 const TypeOopPtr* receiver_type, bool is_virtual,
1109 bool& call_does_dispatch, int& vtable_index,
1110 bool check_access) {
1111 // Set default values for out-parameters.
1112 call_does_dispatch = true;
1113 vtable_index = Method::invalid_vtable_index;
1114
1115 // Choose call strategy.
1116 ciMethod* optimized_virtual_method = optimize_inlining(caller, klass, holder, callee,
1117 receiver_type, check_access);
1118
1119 // Have the call been sufficiently improved such that it is no longer a virtual?
1120 if (optimized_virtual_method != nullptr) {
1121 callee = optimized_virtual_method;
1122 call_does_dispatch = false;
1123 } else if (!UseInlineCaches && is_virtual && callee->is_loaded()) {
1124 // We can make a vtable call at this site
1125 vtable_index = callee->resolve_vtable_index(caller->holder(), holder);
1126 }
1127 return callee;
1128 }
1129
1130 // Identify possible target method and inlining style
1131 ciMethod* Compile::optimize_inlining(ciMethod* caller, ciInstanceKlass* klass, ciKlass* holder,
1132 ciMethod* callee, const TypeOopPtr* receiver_type,
1133 bool check_access) {
1134 // only use for virtual or interface calls
1135
1136 // If it is obviously final, do not bother to call find_monomorphic_target,
1137 // because the class hierarchy checks are not needed, and may fail due to
1138 // incompletely loaded classes. Since we do our own class loading checks
1139 // in this module, we may confidently bind to any method.
1140 if (callee->can_be_statically_bound()) {
1141 return callee;
1142 }
1143
1144 if (receiver_type == nullptr) {
1145 return nullptr; // no receiver type info
1146 }
1147
1148 // Attempt to improve the receiver
1149 bool actual_receiver_is_exact = false;
1150 ciInstanceKlass* actual_receiver = klass;
1151 // Array methods are all inherited from Object, and are monomorphic.
1152 // finalize() call on array is not allowed.
1153 if (receiver_type->isa_aryptr() &&
1154 callee->holder() == env()->Object_klass() &&
1155 callee->name() != ciSymbols::finalize_method_name()) {
1156 return callee;
1157 }
1158
1159 // All other interesting cases are instance klasses.
1160 if (!receiver_type->isa_instptr()) {
1161 return nullptr;
1162 }
1163
1164 ciInstanceKlass* receiver_klass = receiver_type->is_instptr()->instance_klass();
1165 if (receiver_klass->is_loaded() && receiver_klass->is_initialized() && !receiver_klass->is_interface() &&
1166 (receiver_klass == actual_receiver || receiver_klass->is_subtype_of(actual_receiver))) {
1167 // ikl is a same or better type than the original actual_receiver,
1168 // e.g. static receiver from bytecodes.
1169 actual_receiver = receiver_klass;
1170 // Is the actual_receiver exact?
1171 actual_receiver_is_exact = receiver_type->klass_is_exact();
1172 }
1173
1174 ciInstanceKlass* calling_klass = caller->holder();
1175 ciMethod* cha_monomorphic_target = callee->find_monomorphic_target(calling_klass, klass, actual_receiver, check_access);
1176
1177 if (cha_monomorphic_target != nullptr) {
1178 // Hardwiring a virtual.
1179 assert(!callee->can_be_statically_bound(), "should have been handled earlier");
1180 assert(!cha_monomorphic_target->is_abstract(), "");
1181 if (!cha_monomorphic_target->can_be_statically_bound(actual_receiver)) {
1182 // If we inlined because CHA revealed only a single target method,
1183 // then we are dependent on that target method not getting overridden
1184 // by dynamic class loading. Be sure to test the "static" receiver
1185 // dest_method here, as opposed to the actual receiver, which may
1186 // falsely lead us to believe that the receiver is final or private.
1187 dependencies()->assert_unique_concrete_method(actual_receiver, cha_monomorphic_target, holder, callee);
1188 }
1189 return cha_monomorphic_target;
1190 }
1191
1192 // If the type is exact, we can still bind the method w/o a vcall.
1193 // (This case comes after CHA so we can see how much extra work it does.)
1194 if (actual_receiver_is_exact) {
1195 // In case of evolution, there is a dependence on every inlined method, since each
1196 // such method can be changed when its class is redefined.
1197 ciMethod* exact_method = callee->resolve_invoke(calling_klass, actual_receiver);
1198 if (exact_method != nullptr) {
1199 return exact_method;
1200 }
1201 }
1202
1203 return nullptr;
1204 }