1 /*
2 * Copyright (c) 1998, 2026, 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/graphKit.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 bool with_deco) {
55 if (with_deco) {
56 CompileTask::print_inline_indent(depth, out);
57 }
58 out->print(" \\-> TypeProfile (%d/%d counts) = ", receiver_count, site_count);
59 prof_klass->name()->print_symbol_on(out);
60 if (with_deco) {
61 out->cr();
62 }
63 }
64
65 static void trace_type_profile(Compile* C, ciMethod* method, JVMState* jvms,
66 ciMethod* prof_method, ciKlass* prof_klass, int site_count, int receiver_count) {
67 int depth = jvms->depth() - 1;
68 int bci = jvms->bci();
69 if (TraceTypeProfile || C->print_inlining()) {
70 if (!C->print_inlining()) {
71 if (!PrintOpto && !PrintCompilation) {
72 method->print_short_name();
73 tty->cr();
74 }
75 CompileTask::print_inlining_tty(prof_method, depth, bci, InliningResult::SUCCESS);
76 print_trace_type_profile(tty, depth, prof_klass, site_count, receiver_count, true);
77 } else {
78 auto stream = C->inline_printer()->record(method, jvms, InliningResult::SUCCESS);
79 print_trace_type_profile(stream, depth, prof_klass, site_count, receiver_count, false);
80 }
81 }
82
83 LogTarget(Debug, jit, inlining) lt;
84 if (lt.is_enabled()) {
85 LogStream ls(lt);
86 print_trace_type_profile(&ls, depth, prof_klass, site_count, receiver_count, true);
87 }
88 }
89
90 CallGenerator* Compile::call_generator(ciMethod* callee, int vtable_index, bool call_does_dispatch,
91 JVMState* jvms, bool allow_inline,
92 float prof_factor, ciKlass* speculative_receiver_type,
93 bool allow_intrinsics) {
94 assert(callee != nullptr, "failed method resolution");
95
96 ciMethod* caller = jvms->method();
97 int bci = jvms->bci();
98 Bytecodes::Code bytecode = caller->java_code_at_bci(bci);
99 ciMethod* orig_callee = caller->get_method_at_bci(bci);
100
101 const bool is_virtual = (bytecode == Bytecodes::_invokevirtual) || (orig_callee->intrinsic_id() == vmIntrinsics::_linkToVirtual);
102 const bool is_interface = (bytecode == Bytecodes::_invokeinterface) || (orig_callee->intrinsic_id() == vmIntrinsics::_linkToInterface);
103 const bool is_virtual_or_interface = is_virtual || is_interface;
104
105 const bool check_access = !orig_callee->is_method_handle_intrinsic(); // method handle intrinsics don't perform access checks
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() || C->directive()->should_delay_inline(callee);
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 check_access);
246 if (receiver_method == nullptr) {
247 speculative_receiver_type = nullptr;
248 } else {
249 morphism = 1;
250 }
251 } else {
252 // speculation failed before. Use profiling at the call
253 // (could allow bimorphic inlining for instance).
254 speculative_receiver_type = nullptr;
255 }
256 }
257 if (receiver_method == nullptr &&
258 (have_major_receiver || morphism == 1 ||
259 (morphism == 2 && UseBimorphicInlining))) {
260 // receiver_method = profile.method();
261 // Profiles do not suggest methods now. Look it up in the major receiver.
262 assert(check_access, "required");
263 receiver_method = callee->resolve_invoke(jvms->method()->holder(),
264 profile.receiver(0));
265 }
266 if (receiver_method != nullptr) {
267 // The single majority receiver sufficiently outweighs the minority.
268 CallGenerator* hit_cg = this->call_generator(receiver_method,
269 vtable_index, !call_does_dispatch, jvms, allow_inline, prof_factor);
270 if (hit_cg != nullptr) {
271 // Look up second receiver.
272 CallGenerator* next_hit_cg = nullptr;
273 ciMethod* next_receiver_method = nullptr;
274 if (morphism == 2 && UseBimorphicInlining) {
275 assert(check_access, "required");
276 next_receiver_method = callee->resolve_invoke(jvms->method()->holder(),
277 profile.receiver(1));
278 if (next_receiver_method != nullptr) {
279 next_hit_cg = this->call_generator(next_receiver_method,
280 vtable_index, !call_does_dispatch, jvms,
281 allow_inline, prof_factor);
282 if (next_hit_cg != nullptr && !next_hit_cg->is_inline() &&
283 have_major_receiver && UseOnlyInlinedBimorphic) {
284 // Skip if we can't inline second receiver's method
285 next_hit_cg = nullptr;
286 }
287 }
288 }
289 CallGenerator* miss_cg;
290 Deoptimization::DeoptReason reason = (morphism == 2
291 ? Deoptimization::Reason_bimorphic
292 : Deoptimization::reason_class_check(speculative_receiver_type != nullptr));
293 if ((morphism == 1 || (morphism == 2 && next_hit_cg != nullptr)) &&
294 !too_many_traps_or_recompiles(caller, bci, reason)
295 ) {
296 // Generate uncommon trap for class check failure path
297 // in case of monomorphic or bimorphic virtual call site.
298 miss_cg = CallGenerator::for_uncommon_trap(callee, reason,
299 Deoptimization::Action_maybe_recompile);
300 } else {
301 // Generate virtual call for class check failure path
302 // in case of polymorphic virtual call site.
303 miss_cg = (IncrementalInlineVirtual ? CallGenerator::for_late_inline_virtual(callee, vtable_index, prof_factor)
304 : CallGenerator::for_virtual_call(callee, vtable_index));
305 }
306 if (miss_cg != nullptr) {
307 if (next_hit_cg != nullptr) {
308 assert(speculative_receiver_type == nullptr, "shouldn't end up here if we used speculation");
309 trace_type_profile(C, jvms->method(), jvms, next_receiver_method, profile.receiver(1), site_count, profile.receiver_count(1));
310 // We don't need to record dependency on a receiver here and below.
311 // Whenever we inline, the dependency is added by Parse::Parse().
312 miss_cg = CallGenerator::for_predicted_call(profile.receiver(1), miss_cg, next_hit_cg, PROB_MAX);
313 }
314 if (miss_cg != nullptr) {
315 ciKlass* k = speculative_receiver_type != nullptr ? speculative_receiver_type : profile.receiver(0);
316 trace_type_profile(C, jvms->method(), jvms, receiver_method, k, site_count, receiver_count);
317 float hit_prob = speculative_receiver_type != nullptr ? 1.0 : profile.receiver_prob(0);
318 CallGenerator* cg = CallGenerator::for_predicted_call(k, miss_cg, hit_cg, hit_prob);
319 if (cg != nullptr) {
320 return cg;
321 }
322 }
323 }
324 }
325 }
326 }
327
328 // If there is only one implementor of this interface then we
329 // may be able to bind this invoke directly to the implementing
330 // klass but we need both a dependence on the single interface
331 // and on the method we bind to. Additionally since all we know
332 // about the receiver type is that it's supposed to implement the
333 // interface we have to insert a check that it's the class we
334 // expect. Interface types are not checked by the verifier so
335 // they are roughly equivalent to Object.
336 // The number of implementors for declared_interface is less or
337 // equal to the number of implementors for target->holder() so
338 // if number of implementors of target->holder() == 1 then
339 // number of implementors for decl_interface is 0 or 1. If
340 // it's 0 then no class implements decl_interface and there's
341 // no point in inlining.
342 if (call_does_dispatch && is_interface) {
343 ciInstanceKlass* declared_interface = nullptr;
344 if (orig_callee->intrinsic_id() == vmIntrinsics::_linkToInterface) {
345 // MemberName doesn't keep information about resolved interface class (REFC) once
346 // resolution is over, but resolved method holder (DECC) can be used as a
347 // conservative approximation.
348 declared_interface = callee->holder();
349 } else {
350 assert(!orig_callee->is_method_handle_intrinsic(), "not allowed");
351 declared_interface = caller->get_declared_method_holder_at_bci(bci)->as_instance_klass();
352 }
353 assert(declared_interface->is_interface(), "required");
354 ciInstanceKlass* singleton = declared_interface->unique_implementor();
355
356 if (singleton != nullptr) {
357 assert(singleton != declared_interface, "not a unique implementor");
358
359 ciMethod* cha_monomorphic_target =
360 callee->find_monomorphic_target(caller->holder(), declared_interface, singleton, check_access);
361
362 if (cha_monomorphic_target != nullptr &&
363 cha_monomorphic_target->holder() != env()->Object_klass()) { // subtype check against Object is useless
364 ciKlass* holder = cha_monomorphic_target->holder();
365
366 // Try to inline the method found by CHA. Inlined method is guarded by the type check.
367 CallGenerator* hit_cg = call_generator(cha_monomorphic_target,
368 vtable_index, !call_does_dispatch, jvms, allow_inline, prof_factor);
369
370 // Deoptimize on type check fail. The interpreter will throw ICCE for us.
371 CallGenerator* miss_cg = CallGenerator::for_uncommon_trap(callee,
372 Deoptimization::Reason_class_check, Deoptimization::Action_none);
373
374 ciKlass* constraint = (holder->is_subclass_of(singleton) ? holder : singleton); // avoid upcasts
375 CallGenerator* cg = CallGenerator::for_guarded_call(constraint, miss_cg, hit_cg);
376 if (hit_cg != nullptr && cg != nullptr) {
377 dependencies()->assert_unique_implementor(declared_interface, singleton);
378 dependencies()->assert_unique_concrete_method(declared_interface, cha_monomorphic_target, declared_interface, callee);
379 return cg;
380 }
381 }
382 }
383 } // call_does_dispatch && is_interface
384
385 // Nothing claimed the intrinsic, we go with straight-forward inlining
386 // for already discovered intrinsic.
387 if (allow_intrinsics && cg_intrinsic != nullptr) {
388 assert(cg_intrinsic->does_virtual_dispatch(), "sanity");
389 return cg_intrinsic;
390 }
391 } // allow_inline
392
393 // There was no special inlining tactic, or it bailed out.
394 // Use a more generic tactic, like a simple call.
395 if (call_does_dispatch) {
396 const char* msg = "virtual call";
397 C->inline_printer()->record(callee, jvms, InliningResult::FAILURE, msg);
398 C->log_inline_failure(msg);
399 if (IncrementalInlineVirtual && allow_inline) {
400 return CallGenerator::for_late_inline_virtual(callee, vtable_index, prof_factor); // attempt to inline through virtual call later
401 } else {
402 return CallGenerator::for_virtual_call(callee, vtable_index);
403 }
404 } else {
405 // Class Hierarchy Analysis or Type Profile reveals a unique target, or it is a static or special call.
406 CallGenerator* cg = CallGenerator::for_direct_call(callee, should_delay_inlining(callee, jvms));
407 // For optimized virtual calls assert at runtime that receiver object
408 // is a subtype of the method holder.
409 if (cg != nullptr && is_virtual_or_interface && !callee->is_static()) {
410 CallGenerator* trap_cg = CallGenerator::for_uncommon_trap(callee,
411 Deoptimization::Reason_receiver_constraint, Deoptimization::Action_none);
412 cg = CallGenerator::for_guarded_call(callee->holder(), trap_cg, cg);
413 }
414 return cg;
415 }
416 }
417
418 // Return true for methods that shouldn't be inlined early so that
419 // they are easier to analyze and optimize as intrinsics.
420 bool Compile::should_delay_string_inlining(ciMethod* call_method, JVMState* jvms) {
421 if (has_stringbuilder()) {
422
423 if ((call_method->holder() == C->env()->StringBuilder_klass() ||
424 call_method->holder() == C->env()->StringBuffer_klass()) &&
425 (jvms->method()->holder() == C->env()->StringBuilder_klass() ||
426 jvms->method()->holder() == C->env()->StringBuffer_klass())) {
427 // Delay SB calls only when called from non-SB code
428 return false;
429 }
430
431 switch (call_method->intrinsic_id()) {
432 case vmIntrinsics::_StringBuilder_void:
433 case vmIntrinsics::_StringBuilder_int:
434 case vmIntrinsics::_StringBuilder_String:
435 case vmIntrinsics::_StringBuilder_append_char:
436 case vmIntrinsics::_StringBuilder_append_int:
437 case vmIntrinsics::_StringBuilder_append_String:
438 case vmIntrinsics::_StringBuilder_toString:
439 case vmIntrinsics::_StringBuffer_void:
440 case vmIntrinsics::_StringBuffer_int:
441 case vmIntrinsics::_StringBuffer_String:
442 case vmIntrinsics::_StringBuffer_append_char:
443 case vmIntrinsics::_StringBuffer_append_int:
444 case vmIntrinsics::_StringBuffer_append_String:
445 case vmIntrinsics::_StringBuffer_toString:
446 case vmIntrinsics::_Integer_toString:
447 return true;
448
449 case vmIntrinsics::_String_String:
450 {
451 Node* receiver = jvms->map()->in(jvms->argoff() + 1);
452 if (receiver->is_Proj() && receiver->in(0)->is_CallStaticJava()) {
453 CallStaticJavaNode* csj = receiver->in(0)->as_CallStaticJava();
454 ciMethod* m = csj->method();
455 if (m != nullptr &&
456 (m->intrinsic_id() == vmIntrinsics::_StringBuffer_toString ||
457 m->intrinsic_id() == vmIntrinsics::_StringBuilder_toString))
458 // Delay String.<init>(new SB())
459 return true;
460 }
461 return false;
462 }
463
464 default:
465 return false;
466 }
467 }
468 return false;
469 }
470
471 bool Compile::should_delay_boxing_inlining(ciMethod* call_method, JVMState* jvms) {
472 if (eliminate_boxing() && call_method->is_boxing_method()) {
473 set_has_boxed_value(true);
474 return aggressive_unboxing();
475 }
476 return false;
477 }
478
479 bool Compile::should_delay_vector_inlining(ciMethod* call_method, JVMState* jvms) {
480 return EnableVectorSupport && call_method->is_vector_method();
481 }
482
483 bool Compile::should_delay_vector_reboxing_inlining(ciMethod* call_method, JVMState* jvms) {
484 return EnableVectorSupport && (call_method->intrinsic_id() == vmIntrinsics::_VectorRebox);
485 }
486
487 // uncommon-trap call-sites where callee is unloaded, uninitialized or will not link
488 bool Parse::can_not_compile_call_site(ciMethod *dest_method, ciInstanceKlass* klass) {
489 // Additional inputs to consider...
490 // bc = bc()
491 // caller = method()
492 // iter().get_method_holder_index()
493 assert( dest_method->is_loaded(), "ciTypeFlow should not let us get here" );
494 // Interface classes can be loaded & linked and never get around to
495 // being initialized. Uncommon-trap for not-initialized static or
496 // v-calls. Let interface calls happen.
497 ciInstanceKlass* holder_klass = dest_method->holder();
498 if (!holder_klass->is_being_initialized() &&
499 !holder_klass->is_initialized() &&
500 !holder_klass->is_interface()) {
501 uncommon_trap(Deoptimization::Reason_uninitialized,
502 Deoptimization::Action_reinterpret,
503 holder_klass);
504 return true;
505 }
506
507 assert(dest_method->is_loaded(), "dest_method: typeflow responsibility");
508 return false;
509 }
510
511 #ifdef ASSERT
512 static bool check_call_consistency(JVMState* jvms, CallGenerator* cg) {
513 ciMethod* symbolic_info = jvms->method()->get_method_at_bci(jvms->bci());
514 ciMethod* resolved_method = cg->method();
515 if (!ciMethod::is_consistent_info(symbolic_info, resolved_method)) {
516 tty->print_cr("JVMS:");
517 jvms->dump();
518 tty->print_cr("Bytecode info:");
519 jvms->method()->get_method_at_bci(jvms->bci())->print(); tty->cr();
520 tty->print_cr("Resolved method:");
521 cg->method()->print(); tty->cr();
522 return false;
523 }
524 return true;
525 }
526 #endif // ASSERT
527
528 //------------------------------do_call----------------------------------------
529 // Handle your basic call. Inline if we can & want to, else just setup call.
530 void Parse::do_call() {
531 // It's likely we are going to add debug info soon.
532 // Also, if we inline a guy who eventually needs debug info for this JVMS,
533 // our contribution to it is cleaned up right here.
534 kill_dead_locals();
535
536 // Set frequently used booleans
537 const bool is_virtual = bc() == Bytecodes::_invokevirtual;
538 const bool is_virtual_or_interface = is_virtual || bc() == Bytecodes::_invokeinterface;
539 const bool has_receiver = Bytecodes::has_receiver(bc());
540
541 // Find target being called
542 bool will_link;
543 ciSignature* declared_signature = nullptr;
544 ciMethod* orig_callee = iter().get_method(will_link, &declared_signature); // callee in the bytecode
545 ciInstanceKlass* holder_klass = orig_callee->holder();
546 ciKlass* holder = iter().get_declared_method_holder();
547 ciInstanceKlass* klass = ciEnv::get_instance_klass_for_declared_method_holder(holder);
548 assert(declared_signature != nullptr, "cannot be null");
549 JFR_ONLY(Jfr::on_resolution(this, holder, orig_callee);)
550
551 // Bump max node limit for JSR292 users
552 if (bc() == Bytecodes::_invokedynamic || orig_callee->is_method_handle_intrinsic()) {
553 C->set_max_node_limit(3*MaxNodeLimit);
554 }
555
556 // uncommon-trap when callee is unloaded, uninitialized or will not link
557 // bailout when too many arguments for register representation
558 if (!will_link || can_not_compile_call_site(orig_callee, klass)) {
559 if (PrintOpto && (Verbose || WizardMode)) {
560 method()->print_name(); tty->print_cr(" can not compile call at bci %d to:", bci());
561 orig_callee->print_name(); tty->cr();
562 }
563 return;
564 }
565 assert(holder_klass->is_loaded(), "");
566 //assert((bc_callee->is_static() || is_invokedynamic) == !has_receiver , "must match bc"); // XXX invokehandle (cur_bc_raw)
567 // Note: this takes into account invokeinterface of methods declared in java/lang/Object,
568 // which should be invokevirtuals but according to the VM spec may be invokeinterfaces
569 assert(holder_klass->is_interface() || holder_klass->super() == nullptr || (bc() != Bytecodes::_invokeinterface), "must match bc");
570 // Note: In the absence of miranda methods, an abstract class K can perform
571 // an invokevirtual directly on an interface method I.m if K implements I.
572
573 // orig_callee is the resolved callee which's signature includes the
574 // appendix argument.
575 const int nargs = orig_callee->arg_size();
576 const bool is_signature_polymorphic = MethodHandles::is_signature_polymorphic(orig_callee->intrinsic_id());
577
578 // Push appendix argument (MethodType, CallSite, etc.), if one.
579 if (iter().has_appendix()) {
580 ciObject* appendix_arg = iter().get_appendix();
581 const TypeOopPtr* appendix_arg_type = TypeOopPtr::make_from_constant(appendix_arg, /* require_const= */ true);
582 Node* appendix_arg_node = _gvn.makecon(appendix_arg_type);
583 push(appendix_arg_node);
584 }
585
586 // ---------------------
587 // Does Class Hierarchy Analysis reveal only a single target of a v-call?
588 // Then we may inline or make a static call, but become dependent on there being only 1 target.
589 // Does the call-site type profile reveal only one receiver?
590 // Then we may introduce a run-time check and inline on the path where it succeeds.
591 // The other path may uncommon_trap, check for another receiver, or do a v-call.
592
593 // Try to get the most accurate receiver type
594 ciMethod* callee = orig_callee;
595 int vtable_index = Method::invalid_vtable_index;
596 bool call_does_dispatch = false;
597
598 // Speculative type of the receiver if any
599 ciKlass* speculative_receiver_type = nullptr;
600 if (is_virtual_or_interface) {
601 Node* receiver_node = stack(sp() - nargs);
602 const TypeOopPtr* receiver_type = _gvn.type(receiver_node)->isa_oopptr();
603 // call_does_dispatch and vtable_index are out-parameters. They might be changed.
604 // For arrays, klass below is Object. When vtable calls are used,
605 // resolving the call with Object would allow an illegal call to
606 // finalize() on an array. We use holder instead: illegal calls to
607 // finalize() won't be compiled as vtable calls (IC call
608 // resolution will catch the illegal call) and the few legal calls
609 // on array types won't be either.
610 callee = C->optimize_virtual_call(method(), klass, holder, orig_callee,
611 receiver_type, is_virtual,
612 call_does_dispatch, vtable_index); // out-parameters
613 speculative_receiver_type = receiver_type != nullptr ? receiver_type->speculative_type() : nullptr;
614 }
615
616 // Additional receiver subtype checks for interface calls via invokespecial or invokeinterface.
617 ciKlass* receiver_constraint = nullptr;
618 if (iter().cur_bc_raw() == Bytecodes::_invokespecial && !orig_callee->is_object_initializer()) {
619 ciInstanceKlass* calling_klass = method()->holder();
620 ciInstanceKlass* sender_klass = calling_klass;
621 if (sender_klass->is_interface()) {
622 receiver_constraint = sender_klass;
623 }
624 } else if (iter().cur_bc_raw() == Bytecodes::_invokeinterface && orig_callee->is_private()) {
625 assert(holder->is_interface(), "How did we get a non-interface method here!");
626 receiver_constraint = holder;
627 }
628
629 if (receiver_constraint != nullptr) {
630 Node* receiver_node = stack(sp() - nargs);
631 Node* cls_node = makecon(TypeKlassPtr::make(receiver_constraint, Type::trust_interfaces));
632 Node* bad_type_ctrl = nullptr;
633 Node* casted_receiver = gen_checkcast(receiver_node, cls_node, &bad_type_ctrl);
634 if (bad_type_ctrl != nullptr) {
635 PreserveJVMState pjvms(this);
636 set_control(bad_type_ctrl);
637 uncommon_trap(Deoptimization::Reason_class_check,
638 Deoptimization::Action_none);
639 }
640 if (stopped()) {
641 return; // MUST uncommon-trap?
642 }
643 set_stack(sp() - nargs, casted_receiver);
644 }
645
646 // Note: It's OK to try to inline a virtual call.
647 // The call generator will not attempt to inline a polymorphic call
648 // unless it knows how to optimize the receiver dispatch.
649 bool try_inline = (C->do_inlining() || InlineAccessors);
650
651 // ---------------------
652 dec_sp(nargs); // Temporarily pop args for JVM state of call
653 JVMState* jvms = sync_jvms();
654
655 // ---------------------
656 // Decide call tactic.
657 // This call checks with CHA, the interpreter profile, intrinsics table, etc.
658 // It decides whether inlining is desirable or not.
659 CallGenerator* cg = C->call_generator(callee, vtable_index, call_does_dispatch, jvms, try_inline, prof_factor(), speculative_receiver_type);
660
661 // NOTE: Don't use orig_callee and callee after this point! Use cg->method() instead.
662 orig_callee = callee = nullptr;
663
664 // ---------------------
665
666 // Feed profiling data for arguments to the type system so it can
667 // propagate it as speculative types
668 record_profiled_arguments_for_speculation(cg->method(), bc());
669
670 #ifndef PRODUCT
671 // bump global counters for calls
672 count_compiled_calls(/*at_method_entry*/ false, cg->is_inline());
673
674 // Record first part of parsing work for this call
675 parse_histogram()->record_change();
676 #endif // not PRODUCT
677
678 assert(jvms == this->jvms(), "still operating on the right JVMS");
679 assert(jvms_in_sync(), "jvms must carry full info into CG");
680
681 // save across call, for a subsequent cast_not_null.
682 Node* receiver = has_receiver ? argument(0) : nullptr;
683
684 // The extra CheckCastPPs for speculative types mess with PhaseStringOpts
685 if (receiver != nullptr && !call_does_dispatch && !cg->is_string_late_inline()) {
686 // Feed profiling data for a single receiver to the type system so
687 // it can propagate it as a speculative type
688 receiver = record_profiled_receiver_for_speculation(receiver);
689 }
690
691 JVMState* new_jvms = cg->generate(jvms);
692 if (new_jvms == nullptr) {
693 // When inlining attempt fails (e.g., too many arguments),
694 // it may contaminate the current compile state, making it
695 // impossible to pull back and try again. Once we call
696 // cg->generate(), we are committed. If it fails, the whole
697 // compilation task is compromised.
698 if (failing()) return;
699
700 // This can happen if a library intrinsic is available, but refuses
701 // the call site, perhaps because it did not match a pattern the
702 // intrinsic was expecting to optimize. Should always be possible to
703 // get a normal java call that may inline in that case
704 cg = C->call_generator(cg->method(), vtable_index, call_does_dispatch, jvms, try_inline, prof_factor(), speculative_receiver_type, /* allow_intrinsics= */ false);
705 new_jvms = cg->generate(jvms);
706 if (new_jvms == nullptr) {
707 guarantee(failing(), "call failed to generate: calls should work");
708 return;
709 }
710 }
711
712 if (cg->is_inline()) {
713 // Accumulate has_loops estimate
714 C->env()->notice_inlined_method(cg->method());
715 }
716
717 // Reset parser state from [new_]jvms, which now carries results of the call.
718 // Return value (if any) is already pushed on the stack by the cg.
719 add_exception_states_from(new_jvms);
720 if (new_jvms->map()->control() == top()) {
721 stop_and_kill_map();
722 } else {
723 assert(new_jvms->same_calls_as(jvms), "method/bci left unchanged");
724 set_jvms(new_jvms);
725 }
726
727 assert(check_call_consistency(jvms, cg), "inconsistent info");
728
729 if (!stopped()) {
730 // This was some sort of virtual call, which did a null check for us.
731 // Now we can assert receiver-not-null, on the normal return path.
732 if (receiver != nullptr && cg->is_virtual()) {
733 Node* cast = cast_not_null(receiver);
734 // %%% assert(receiver == cast, "should already have cast the receiver");
735 }
736
737 ciType* rtype = cg->method()->return_type();
738 ciType* ctype = declared_signature->return_type();
739
740 if (Bytecodes::has_optional_appendix(iter().cur_bc_raw()) || is_signature_polymorphic) {
741 // Be careful here with return types.
742 if (ctype != rtype) {
743 BasicType rt = rtype->basic_type();
744 BasicType ct = ctype->basic_type();
745 if (ct == T_VOID) {
746 // It's OK for a method to return a value that is discarded.
747 // The discarding does not require any special action from the caller.
748 // The Java code knows this, at VerifyType.isNullConversion.
749 pop_node(rt); // whatever it was, pop it
750 } else if (rt == T_INT || is_subword_type(rt)) {
751 // Nothing. These cases are handled in lambda form bytecode.
752 assert(ct == T_INT || is_subword_type(ct), "must match: rt=%s, ct=%s", type2name(rt), type2name(ct));
753 } else if (is_reference_type(rt)) {
754 assert(is_reference_type(ct), "rt=%s, ct=%s", type2name(rt), type2name(ct));
755 if (ctype->is_loaded()) {
756 const TypeOopPtr* arg_type = TypeOopPtr::make_from_klass(rtype->as_klass());
757 const Type* sig_type = TypeOopPtr::make_from_klass(ctype->as_klass());
758 if (arg_type != nullptr && !arg_type->higher_equal(sig_type)) {
759 Node* retnode = pop();
760 Node* cast_obj = _gvn.transform(new CheckCastPPNode(control(), retnode, sig_type));
761 push(cast_obj);
762 }
763 }
764 } else {
765 assert(rt == ct, "unexpected mismatch: rt=%s, ct=%s", type2name(rt), type2name(ct));
766 // push a zero; it's better than getting an oop/int mismatch
767 pop_node(rt);
768 Node* retnode = zerocon(ct);
769 push_node(ct, retnode);
770 }
771 // Now that the value is well-behaved, continue with the call-site type.
772 rtype = ctype;
773 }
774 } else {
775 // Symbolic resolution enforces the types to be the same.
776 // NOTE: We must relax the assert for unloaded types because two
777 // different ciType instances of the same unloaded class type
778 // can appear to be "loaded" by different loaders (depending on
779 // the accessing class).
780 assert(!rtype->is_loaded() || !ctype->is_loaded() || rtype == ctype,
781 "mismatched return types: rtype=%s, ctype=%s", rtype->name(), ctype->name());
782 }
783
784 // If the return type of the method is not loaded, assert that the
785 // value we got is a null. Otherwise, we need to recompile.
786 if (!rtype->is_loaded()) {
787 if (PrintOpto && (Verbose || WizardMode)) {
788 method()->print_name(); tty->print_cr(" asserting nullness of result at bci: %d", bci());
789 cg->method()->print_name(); tty->cr();
790 }
791 if (C->log() != nullptr) {
792 C->log()->elem("assert_null reason='return' klass='%d'",
793 C->log()->identify(rtype));
794 }
795 // If there is going to be a trap, put it at the next bytecode:
796 set_bci(iter().next_bci());
797 null_assert(peek());
798 set_bci(iter().cur_bci()); // put it back
799 }
800 BasicType ct = ctype->basic_type();
801 if (is_reference_type(ct)) {
802 record_profiled_return_for_speculation();
803 }
804 }
805
806 // Restart record of parsing work after possible inlining of call
807 #ifndef PRODUCT
808 parse_histogram()->set_initial_state(bc());
809 #endif
810 }
811
812 //---------------------------catch_call_exceptions-----------------------------
813 // Put a Catch and CatchProj nodes behind a just-created call.
814 // Send their caught exceptions to the proper handler.
815 // This may be used after a call to the rethrow VM stub,
816 // when it is needed to process unloaded exception classes.
817 void Parse::catch_call_exceptions(ciExceptionHandlerStream& handlers) {
818 // Exceptions are delivered through this channel:
819 Node* i_o = this->i_o();
820
821 // Add a CatchNode.
822 Arena tmp_mem{mtCompiler};
823 GrowableArray<int> bcis(&tmp_mem, 8, 0, -1);
824 GrowableArray<const Type*> extypes(&tmp_mem, 8, 0, nullptr);
825 GrowableArray<int> saw_unloaded(&tmp_mem, 8, 0, -1);
826
827 bool default_handler = false;
828 for (; !handlers.is_done(); handlers.next()) {
829 ciExceptionHandler* h = handlers.handler();
830 int h_bci = h->handler_bci();
831 ciInstanceKlass* h_klass = h->is_catch_all() ? env()->Throwable_klass() : h->catch_klass();
832 // Do not introduce unloaded exception types into the graph:
833 if (!h_klass->is_loaded()) {
834 if (saw_unloaded.contains(h_bci)) {
835 /* We've already seen an unloaded exception with h_bci,
836 so don't duplicate. Duplication will cause the CatchNode to be
837 unnecessarily large. See 4713716. */
838 continue;
839 } else {
840 saw_unloaded.append(h_bci);
841 }
842 }
843 const Type* h_extype = TypeOopPtr::make_from_klass(h_klass);
844 // (We use make_from_klass because it respects UseUniqueSubclasses.)
845 h_extype = h_extype->join(TypeInstPtr::NOTNULL);
846 assert(!h_extype->empty(), "sanity");
847 // Note: It's OK if the BCIs repeat themselves.
848 bcis.append(h_bci);
849 extypes.append(h_extype);
850 if (h_bci == -1) {
851 default_handler = true;
852 }
853 }
854
855 if (!default_handler) {
856 bcis.append(-1);
857 const Type* extype = TypeOopPtr::make_from_klass(env()->Throwable_klass())->is_instptr();
858 extype = extype->join(TypeInstPtr::NOTNULL);
859 extypes.append(extype);
860 }
861
862 int len = bcis.length();
863 CatchNode *cn = new CatchNode(control(), i_o, len+1);
864 Node *catch_ = _gvn.transform(cn);
865
866 // now branch with the exception state to each of the (potential)
867 // handlers
868 for(int i=0; i < len; i++) {
869 // Setup JVM state to enter the handler.
870 PreserveJVMState pjvms(this);
871 // Locals are just copied from before the call.
872 // Get control from the CatchNode.
873 int handler_bci = bcis.at(i);
874 Node* ctrl = _gvn.transform( new CatchProjNode(catch_, i+1,handler_bci));
875 // This handler cannot happen?
876 if (ctrl == top()) continue;
877 set_control(ctrl);
878
879 // Create exception oop
880 const TypeInstPtr* extype = extypes.at(i)->is_instptr();
881 Node* ex_oop = _gvn.transform(new CreateExNode(extypes.at(i), ctrl, i_o));
882
883 // Handle unloaded exception classes.
884 if (saw_unloaded.contains(handler_bci)) {
885 // An unloaded exception type is coming here. Do an uncommon trap.
886 #ifndef PRODUCT
887 // We do not expect the same handler bci to take both cold unloaded
888 // and hot loaded exceptions. But, watch for it.
889 if (PrintOpto && (Verbose || WizardMode) && extype->is_loaded()) {
890 tty->print("Warning: Handler @%d takes mixed loaded/unloaded exceptions in ", bci());
891 method()->print_name(); tty->cr();
892 } else if (PrintOpto && (Verbose || WizardMode)) {
893 tty->print("Bailing out on unloaded exception type ");
894 extype->instance_klass()->print_name();
895 tty->print(" at bci:%d in ", bci());
896 method()->print_name(); tty->cr();
897 }
898 #endif
899 // Emit an uncommon trap instead of processing the block.
900 set_bci(handler_bci);
901 push_ex_oop(ex_oop);
902 uncommon_trap(Deoptimization::Reason_unloaded,
903 Deoptimization::Action_reinterpret,
904 extype->instance_klass(), "!loaded exception");
905 set_bci(iter().cur_bci()); // put it back
906 continue;
907 }
908
909 // go to the exception handler
910 if (handler_bci < 0) { // merge with corresponding rethrow node
911 throw_to_exit(make_exception_state(ex_oop));
912 } else { // Else jump to corresponding handle
913 push_and_merge_exception(handler_bci, ex_oop);
914 }
915 }
916
917 // The first CatchProj is for the normal return.
918 // (Note: If this is a call to rethrow_Java, this node goes dead.)
919 set_control(_gvn.transform( new CatchProjNode(catch_, CatchProjNode::fall_through_index, CatchProjNode::no_handler_bci)));
920 }
921
922
923 //----------------------------catch_inline_exceptions--------------------------
924 // Handle all exceptions thrown by an inlined method or individual bytecode.
925 // Common case 1: we have no handler, so all exceptions merge right into
926 // the rethrow case.
927 // Case 2: we have some handlers, with loaded exception klasses that have
928 // no subklasses. We do a Deutsch-Schiffman style type-check on the incoming
929 // exception oop and branch to the handler directly.
930 // Case 3: We have some handlers with subklasses or are not loaded at
931 // compile-time. We have to call the runtime to resolve the exception.
932 // So we insert a RethrowCall and all the logic that goes with it.
933 void Parse::catch_inline_exceptions(SafePointNode* ex_map) {
934 // Caller is responsible for saving away the map for normal control flow!
935 assert(stopped(), "call set_map(nullptr) first");
936 assert(method()->has_exception_handlers(), "don't come here w/o work to do");
937
938 Node* ex_node = saved_ex_oop(ex_map);
939 if (ex_node == top()) {
940 // No action needed.
941 return;
942 }
943 const TypeInstPtr* ex_type = _gvn.type(ex_node)->isa_instptr();
944 NOT_PRODUCT(if (ex_type==nullptr) tty->print_cr("*** Exception not InstPtr"));
945 if (ex_type == nullptr)
946 ex_type = TypeOopPtr::make_from_klass(env()->Throwable_klass())->is_instptr();
947
948 // determine potential exception handlers
949 ciExceptionHandlerStream handlers(method(), bci(),
950 ex_type->instance_klass(),
951 ex_type->klass_is_exact());
952
953 // Start executing from the given throw state. (Keep its stack, for now.)
954 // Get the exception oop as known at compile time.
955 ex_node = use_exception_state(ex_map);
956
957 // Get the exception oop klass from its header
958 Node* ex_klass_node = nullptr;
959 if (has_exception_handler() && !ex_type->klass_is_exact()) {
960 Node* p = basic_plus_adr( ex_node, ex_node, oopDesc::klass_offset_in_bytes());
961 ex_klass_node = _gvn.transform(LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeInstKlassPtr::OBJECT));
962
963 // Compute the exception klass a little more cleverly.
964 // Obvious solution is to simple do a LoadKlass from the 'ex_node'.
965 // However, if the ex_node is a PhiNode, I'm going to do a LoadKlass for
966 // each arm of the Phi. If I know something clever about the exceptions
967 // I'm loading the class from, I can replace the LoadKlass with the
968 // klass constant for the exception oop.
969 if (ex_node->is_Phi()) {
970 ex_klass_node = new PhiNode(ex_node->in(0), TypeInstKlassPtr::OBJECT);
971 for (uint i = 1; i < ex_node->req(); i++) {
972 Node* ex_in = ex_node->in(i);
973 if (ex_in == top() || ex_in == nullptr) {
974 // This path was not taken.
975 ex_klass_node->init_req(i, top());
976 continue;
977 }
978 Node* p = basic_plus_adr(ex_in, ex_in, oopDesc::klass_offset_in_bytes());
979 Node* k = _gvn.transform(LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeInstKlassPtr::OBJECT));
980 ex_klass_node->init_req( i, k );
981 }
982 ex_klass_node = _gvn.transform(ex_klass_node);
983 }
984 }
985
986 // Scan the exception table for applicable handlers.
987 // If none, we can call rethrow() and be done!
988 // If precise (loaded with no subklasses), insert a D.S. style
989 // pointer compare to the correct handler and loop back.
990 // If imprecise, switch to the Rethrow VM-call style handling.
991
992 int remaining = handlers.count_remaining();
993
994 // iterate through all entries sequentially
995 for (;!handlers.is_done(); handlers.next()) {
996 ciExceptionHandler* handler = handlers.handler();
997
998 if (handler->is_rethrow()) {
999 // If we fell off the end of the table without finding an imprecise
1000 // exception klass (and without finding a generic handler) then we
1001 // know this exception is not handled in this method. We just rethrow
1002 // the exception into the caller.
1003 throw_to_exit(make_exception_state(ex_node));
1004 return;
1005 }
1006
1007 // exception handler bci range covers throw_bci => investigate further
1008 int handler_bci = handler->handler_bci();
1009
1010 if (remaining == 1) {
1011 if (PrintOpto && WizardMode) {
1012 tty->print_cr(" Catching every inline exception bci:%d -> handler_bci:%d", bci(), handler_bci);
1013 }
1014 push_and_merge_exception(handler_bci, ex_node); // jump to handler
1015 return; // No more handling to be done here!
1016 }
1017
1018 // Get the handler's klass
1019 ciInstanceKlass* klass = handler->catch_klass();
1020
1021 if (!klass->is_loaded()) { // klass is not loaded?
1022 // fall through into catch_call_exceptions which will emit a
1023 // handler with an uncommon trap.
1024 break;
1025 }
1026
1027 if (klass->is_interface()) // should not happen, but...
1028 break; // bail out
1029
1030 // Check the type of the exception against the catch type
1031 const TypeKlassPtr *tk = TypeKlassPtr::make(klass);
1032 Node* con = _gvn.makecon(tk);
1033 Node* not_subtype_ctrl = gen_subtype_check(ex_klass_node, con);
1034 if (!stopped()) {
1035 PreserveJVMState pjvms(this);
1036 const TypeInstPtr* tinst = TypeOopPtr::make_from_klass_unique(klass)->cast_to_ptr_type(TypePtr::NotNull)->is_instptr();
1037 assert(klass->has_subklass() || tinst->klass_is_exact(), "lost exactness");
1038 Node* ex_oop = _gvn.transform(new CheckCastPPNode(control(), ex_node, tinst));
1039 if (PrintOpto && WizardMode) {
1040 tty->print(" Catching inline exception bci:%d -> handler_bci:%d -- ", bci(), handler_bci);
1041 klass->print_name();
1042 tty->cr();
1043 }
1044 // If this is a backwards branch in the bytecodes, add safepoint
1045 push_and_merge_exception(handler_bci, ex_oop);
1046 }
1047 set_control(not_subtype_ctrl);
1048
1049 // Come here if exception does not match handler.
1050 // Carry on with more handler checks.
1051 --remaining;
1052 }
1053
1054 assert(!stopped(), "you should return if you finish the chain");
1055
1056 // Oops, need to call into the VM to resolve the klasses at runtime.
1057 kill_dead_locals();
1058
1059 { PreserveReexecuteState preexecs(this);
1060 // When throwing an exception, set the reexecute flag for deoptimization.
1061 // This is mostly needed to pass -XX:+VerifyStack sanity checks.
1062 jvms()->set_should_reexecute(true);
1063
1064 make_runtime_call(RC_NO_LEAF | RC_MUST_THROW,
1065 OptoRuntime::rethrow_Type(),
1066 OptoRuntime::rethrow_stub(),
1067 nullptr, nullptr,
1068 ex_node);
1069 }
1070
1071 // Rethrow is a pure call, no side effects, only a result.
1072 // The result cannot be allocated, so we use I_O
1073
1074 // Catch exceptions from the rethrow
1075 catch_call_exceptions(handlers);
1076 }
1077
1078
1079 // (Note: Moved add_debug_info into GraphKit::add_safepoint_edges.)
1080
1081
1082 #ifndef PRODUCT
1083 void Parse::count_compiled_calls(bool at_method_entry, bool is_inline) {
1084 if (CountCompiledCalls) {
1085 if (at_method_entry) {
1086 // bump invocation counter if top method (for statistics)
1087 if (CountCompiledCalls && depth() == 1) {
1088 const TypePtr* addr_type = TypeMetadataPtr::make(method());
1089 Node* adr1 = makecon(addr_type);
1090 Node* adr2 = off_heap_plus_addr(adr1, in_bytes(Method::compiled_invocation_counter_offset()));
1091 increment_counter(adr2);
1092 }
1093 } else if (is_inline) {
1094 switch (bc()) {
1095 case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_inlined_calls_addr()); break;
1096 case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_inlined_interface_calls_addr()); break;
1097 case Bytecodes::_invokestatic:
1098 case Bytecodes::_invokedynamic:
1099 case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_inlined_static_calls_addr()); break;
1100 default: fatal("unexpected call bytecode");
1101 }
1102 } else {
1103 switch (bc()) {
1104 case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_normal_calls_addr()); break;
1105 case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_interface_calls_addr()); break;
1106 case Bytecodes::_invokestatic:
1107 case Bytecodes::_invokedynamic:
1108 case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_static_calls_addr()); break;
1109 default: fatal("unexpected call bytecode");
1110 }
1111 }
1112 }
1113 }
1114 #endif //PRODUCT
1115
1116
1117 ciMethod* Compile::optimize_virtual_call(ciMethod* caller, ciInstanceKlass* klass,
1118 ciKlass* holder, ciMethod* callee,
1119 const TypeOopPtr* receiver_type, bool is_virtual,
1120 bool& call_does_dispatch, int& vtable_index,
1121 bool check_access) {
1122 // Set default values for out-parameters.
1123 call_does_dispatch = true;
1124 vtable_index = Method::invalid_vtable_index;
1125
1126 // Choose call strategy.
1127 ciMethod* optimized_virtual_method = optimize_inlining(caller, klass, holder, callee,
1128 receiver_type, check_access);
1129
1130 // Have the call been sufficiently improved such that it is no longer a virtual?
1131 if (optimized_virtual_method != nullptr) {
1132 callee = optimized_virtual_method;
1133 call_does_dispatch = false;
1134 } else if (!UseInlineCaches && is_virtual && callee->is_loaded()) {
1135 // We can make a vtable call at this site
1136 vtable_index = callee->resolve_vtable_index(caller->holder(), holder);
1137 }
1138 return callee;
1139 }
1140
1141 // Identify possible target method and inlining style
1142 ciMethod* Compile::optimize_inlining(ciMethod* caller, ciInstanceKlass* klass, ciKlass* holder,
1143 ciMethod* callee, const TypeOopPtr* receiver_type,
1144 bool check_access) {
1145 // only use for virtual or interface calls
1146
1147 // If it is obviously final, do not bother to call find_monomorphic_target,
1148 // because the class hierarchy checks are not needed, and may fail due to
1149 // incompletely loaded classes. Since we do our own class loading checks
1150 // in this module, we may confidently bind to any method.
1151 if (callee->can_be_statically_bound()) {
1152 return callee;
1153 }
1154
1155 if (receiver_type == nullptr) {
1156 return nullptr; // no receiver type info
1157 }
1158
1159 // Attempt to improve the receiver
1160 bool actual_receiver_is_exact = false;
1161 ciInstanceKlass* actual_receiver = klass;
1162 // Array methods are all inherited from Object, and are monomorphic.
1163 // finalize() call on array is not allowed.
1164 if (receiver_type->isa_aryptr() &&
1165 callee->holder() == env()->Object_klass() &&
1166 callee->name() != ciSymbols::finalize_method_name()) {
1167 return callee;
1168 }
1169
1170 // All other interesting cases are instance klasses.
1171 if (!receiver_type->isa_instptr()) {
1172 return nullptr;
1173 }
1174
1175 ciInstanceKlass* receiver_klass = receiver_type->is_instptr()->instance_klass();
1176 if (receiver_klass->is_loaded() && receiver_klass->is_initialized() && !receiver_klass->is_interface() &&
1177 (receiver_klass == actual_receiver || receiver_klass->is_subtype_of(actual_receiver))) {
1178 // ikl is a same or better type than the original actual_receiver,
1179 // e.g. static receiver from bytecodes.
1180 actual_receiver = receiver_klass;
1181 // Is the actual_receiver exact?
1182 actual_receiver_is_exact = receiver_type->klass_is_exact();
1183 }
1184
1185 ciInstanceKlass* calling_klass = caller->holder();
1186 ciMethod* cha_monomorphic_target = callee->find_monomorphic_target(calling_klass, klass, actual_receiver, check_access);
1187
1188 if (cha_monomorphic_target != nullptr) {
1189 // Hardwiring a virtual.
1190 assert(!callee->can_be_statically_bound(), "should have been handled earlier");
1191 assert(!cha_monomorphic_target->is_abstract(), "");
1192 if (!cha_monomorphic_target->can_be_statically_bound(actual_receiver)) {
1193 // If we inlined because CHA revealed only a single target method,
1194 // then we are dependent on that target method not getting overridden
1195 // by dynamic class loading. Be sure to test the "static" receiver
1196 // dest_method here, as opposed to the actual receiver, which may
1197 // falsely lead us to believe that the receiver is final or private.
1198 dependencies()->assert_unique_concrete_method(actual_receiver, cha_monomorphic_target, holder, callee);
1199 }
1200 return cha_monomorphic_target;
1201 }
1202
1203 // If the type is exact, we can still bind the method w/o a vcall.
1204 // (This case comes after CHA so we can see how much extra work it does.)
1205 if (actual_receiver_is_exact) {
1206 // In case of evolution, there is a dependence on every inlined method, since each
1207 // such method can be changed when its class is redefined.
1208 ciMethod* exact_method = callee->resolve_invoke(calling_klass, actual_receiver);
1209 if (exact_method != nullptr) {
1210 return exact_method;
1211 }
1212 }
1213
1214 return nullptr;
1215 }