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/vmIntrinsics.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "compiler/compileBroker.hpp"
31 #include "compiler/compileLog.hpp"
32 #include "interpreter/linkResolver.hpp"
33 #include "jvm_io.h"
34 #include "logging/log.hpp"
35 #include "logging/logLevel.hpp"
36 #include "logging/logMessage.hpp"
37 #include "logging/logStream.hpp"
38 #include "opto/addnode.hpp"
39 #include "opto/callGenerator.hpp"
40 #include "opto/castnode.hpp"
41 #include "opto/cfgnode.hpp"
42 #include "opto/inlinetypenode.hpp"
43 #include "opto/mulnode.hpp"
44 #include "opto/parse.hpp"
45 #include "opto/rootnode.hpp"
46 #include "opto/runtime.hpp"
47 #include "opto/subnode.hpp"
48 #include "prims/methodHandles.hpp"
49 #include "runtime/sharedRuntime.hpp"
50 #include "utilities/macros.hpp"
51 #if INCLUDE_JFR
52 #include "jfr/jfr.hpp"
53 #endif
54
55 static void print_trace_type_profile(outputStream* out, int depth, ciKlass* prof_klass, int site_count, int receiver_count,
56 bool with_deco) {
57 if (with_deco) {
58 CompileTask::print_inline_indent(depth, out);
59 }
60 out->print(" \\-> TypeProfile (%d/%d counts) = ", receiver_count, site_count);
61 prof_klass->name()->print_symbol_on(out);
62 if (with_deco) {
63 out->cr();
64 }
65 }
66
67 static void trace_type_profile(Compile* C, ciMethod* method, JVMState* jvms,
68 ciMethod* prof_method, ciKlass* prof_klass, int site_count, int receiver_count) {
69 int depth = jvms->depth() - 1;
70 int bci = jvms->bci();
71 if (TraceTypeProfile || C->print_inlining()) {
72 if (!C->print_inlining()) {
73 if (!PrintOpto && !PrintCompilation) {
74 method->print_short_name();
75 tty->cr();
76 }
77 CompileTask::print_inlining_tty(prof_method, depth, bci, InliningResult::SUCCESS);
78 print_trace_type_profile(tty, depth, prof_klass, site_count, receiver_count, true);
79 } else {
80 auto stream = C->inline_printer()->record(method, jvms, InliningResult::SUCCESS);
81 print_trace_type_profile(stream, depth, prof_klass, site_count, receiver_count, false);
82 }
83 }
84
85 LogTarget(Debug, jit, inlining) lt;
86 if (lt.is_enabled()) {
87 LogStream ls(lt);
88 print_trace_type_profile(&ls, depth, prof_klass, site_count, receiver_count, true);
89 }
90 }
91
92 CallGenerator* Compile::call_generator(ciMethod* callee, int vtable_index, bool call_does_dispatch,
93 JVMState* jvms, bool allow_inline,
94 float prof_factor, ciKlass* speculative_receiver_type,
95 bool allow_intrinsics) {
96 assert(callee != nullptr, "failed method resolution");
97
98 ciMethod* caller = jvms->method();
99 int bci = jvms->bci();
100 Bytecodes::Code bytecode = caller->java_code_at_bci(bci);
101 ciMethod* orig_callee = caller->get_method_at_bci(bci);
102
103 const bool is_virtual = (bytecode == Bytecodes::_invokevirtual) || (orig_callee->intrinsic_id() == vmIntrinsics::_linkToVirtual);
104 const bool is_interface = (bytecode == Bytecodes::_invokeinterface) || (orig_callee->intrinsic_id() == vmIntrinsics::_linkToInterface);
105 const bool is_virtual_or_interface = is_virtual || is_interface;
106
107 const bool check_access = !orig_callee->is_method_handle_intrinsic(); // method handle intrinsics don't perform access checks
108
109 // Dtrace currently doesn't work unless all calls are vanilla
110 if (env()->dtrace_method_probes()) {
111 allow_inline = false;
112 }
113
114 // Note: When we get profiling during stage-1 compiles, we want to pull
115 // from more specific profile data which pertains to this inlining.
116 // Right now, ignore the information in jvms->caller(), and do method[bci].
117 ciCallProfile profile = caller->call_profile_at_bci(bci);
118
119 // See how many times this site has been invoked.
120 int site_count = profile.count();
121 int receiver_count = -1;
122 if (call_does_dispatch && UseTypeProfile && profile.has_receiver(0)) {
123 // Receivers in the profile structure are ordered by call counts
124 // so that the most called (major) receiver is profile.receiver(0).
125 receiver_count = profile.receiver_count(0);
126 }
127
128 CompileLog* log = this->log();
129 if (log != nullptr) {
130 int rid = (receiver_count >= 0)? log->identify(profile.receiver(0)): -1;
131 int r2id = (rid != -1 && profile.has_receiver(1))? log->identify(profile.receiver(1)):-1;
132 log->begin_elem("call method='%d' count='%d' prof_factor='%f'",
133 log->identify(callee), site_count, prof_factor);
134 if (call_does_dispatch) log->print(" virtual='1'");
135 if (allow_inline) log->print(" inline='1'");
136 if (receiver_count >= 0) {
137 log->print(" receiver='%d' receiver_count='%d'", rid, receiver_count);
138 if (profile.has_receiver(1)) {
139 log->print(" receiver2='%d' receiver2_count='%d'", r2id, profile.receiver_count(1));
140 }
141 }
142 if (callee->is_method_handle_intrinsic()) {
143 log->print(" method_handle_intrinsic='1'");
144 }
145 log->end_elem();
146 }
147
148 // Special case the handling of certain common, profitable library
149 // methods. If these methods are replaced with specialized code,
150 // then we return it as the inlined version of the call.
151 CallGenerator* cg_intrinsic = nullptr;
152 if (allow_inline && allow_intrinsics) {
153 CallGenerator* cg = find_intrinsic(callee, call_does_dispatch);
154 if (cg != nullptr) {
155 if (cg->is_predicated()) {
156 // Code without intrinsic but, hopefully, inlined.
157 CallGenerator* inline_cg = this->call_generator(callee,
158 vtable_index, call_does_dispatch, jvms, allow_inline, prof_factor, speculative_receiver_type, false);
159 if (inline_cg != nullptr) {
160 cg = CallGenerator::for_predicated_intrinsic(cg, inline_cg);
161 }
162 }
163
164 // If intrinsic does the virtual dispatch, we try to use the type profile
165 // first, and hopefully inline it as the regular virtual call below.
166 // We will retry the intrinsic if nothing had claimed it afterwards.
167 if (cg->does_virtual_dispatch()) {
168 cg_intrinsic = cg;
169 cg = nullptr;
170 } else if (IncrementalInline && should_delay_vector_inlining(callee, jvms)) {
171 return CallGenerator::for_late_inline(callee, cg);
172 } else {
173 return cg;
174 }
175 }
176 }
177
178 // Do method handle calls.
179 // NOTE: This must happen before normal inlining logic below since
180 // MethodHandle.invoke* are native methods which obviously don't
181 // have bytecodes and so normal inlining fails.
182 if (callee->is_method_handle_intrinsic()) {
183 CallGenerator* cg = CallGenerator::for_method_handle_call(jvms, caller, callee, allow_inline);
184 return cg;
185 }
186
187 // Attempt to inline...
188 if (allow_inline) {
189 // The profile data is only partly attributable to this caller,
190 // scale back the call site information.
191 float past_uses = jvms->method()->scale_count(site_count, prof_factor);
192 // This is the number of times we expect the call code to be used.
193 float expected_uses = past_uses;
194
195 // Try inlining a bytecoded method:
196 if (!call_does_dispatch) {
197 InlineTree* ilt = InlineTree::find_subtree_from_root(this->ilt(), jvms->caller(), jvms->method());
198 bool should_delay = C->should_delay_inlining() || C->directive()->should_delay_inline(callee);
199 if (ilt->ok_to_inline(callee, jvms, profile, should_delay)) {
200 CallGenerator* cg = CallGenerator::for_inline(callee, expected_uses);
201 // For optimized virtual calls assert at runtime that receiver object
202 // is a subtype of the inlined method holder. CHA can report a method
203 // as a unique target under an abstract method, but receiver type
204 // sometimes has a broader type. Similar scenario is possible with
205 // default methods when type system loses information about implemented
206 // interfaces.
207 if (cg != nullptr && is_virtual_or_interface && !callee->is_static()) {
208 CallGenerator* trap_cg = CallGenerator::for_uncommon_trap(callee,
209 Deoptimization::Reason_receiver_constraint, Deoptimization::Action_none);
210
211 cg = CallGenerator::for_guarded_call(callee->holder(), trap_cg, cg);
212 }
213 if (cg != nullptr) {
214 // Delay the inlining of this method to give us the
215 // opportunity to perform some high level optimizations
216 // first.
217 if (should_delay) {
218 return CallGenerator::for_late_inline(callee, cg);
219 } else if (should_delay_string_inlining(callee, jvms)) {
220 return CallGenerator::for_string_late_inline(callee, cg);
221 } else if (should_delay_boxing_inlining(callee, jvms)) {
222 return CallGenerator::for_boxing_late_inline(callee, cg);
223 } else if (should_delay_vector_reboxing_inlining(callee, jvms)) {
224 return CallGenerator::for_vector_reboxing_late_inline(callee, cg);
225 } else {
226 return cg;
227 }
228 }
229 }
230 }
231
232 // Try using the type profile.
233 if (call_does_dispatch && site_count > 0 && UseTypeProfile) {
234 // The major receiver's count >= TypeProfileMajorReceiverPercent of site_count.
235 bool have_major_receiver = profile.has_receiver(0) && (100.*profile.receiver_prob(0) >= (float)TypeProfileMajorReceiverPercent);
236 ciMethod* receiver_method = nullptr;
237
238 int morphism = profile.morphism();
239 if (speculative_receiver_type != nullptr) {
240 if (!too_many_traps_or_recompiles(caller, bci, Deoptimization::Reason_speculate_class_check)) {
241 // We have a speculative type, we should be able to resolve
242 // the call. We do that before looking at the profiling at
243 // this invoke because it may lead to bimorphic inlining which
244 // a speculative type should help us avoid.
245 receiver_method = callee->resolve_invoke(jvms->method()->holder(),
246 speculative_receiver_type,
247 check_access);
248 if (receiver_method == nullptr) {
249 speculative_receiver_type = nullptr;
250 } else {
251 morphism = 1;
252 }
253 } else {
254 // speculation failed before. Use profiling at the call
255 // (could allow bimorphic inlining for instance).
256 speculative_receiver_type = nullptr;
257 }
258 }
259 if (receiver_method == nullptr &&
260 (have_major_receiver || morphism == 1 ||
261 (morphism == 2 && UseBimorphicInlining))) {
262 // receiver_method = profile.method();
263 // Profiles do not suggest methods now. Look it up in the major receiver.
264 assert(check_access, "required");
265 receiver_method = callee->resolve_invoke(jvms->method()->holder(),
266 profile.receiver(0));
267 }
268 if (receiver_method != nullptr) {
269 // The single majority receiver sufficiently outweighs the minority.
270 CallGenerator* hit_cg = this->call_generator(receiver_method,
271 vtable_index, !call_does_dispatch, jvms, allow_inline, prof_factor);
272 if (hit_cg != nullptr) {
273 // Look up second receiver.
274 CallGenerator* next_hit_cg = nullptr;
275 ciMethod* next_receiver_method = nullptr;
276 if (morphism == 2 && UseBimorphicInlining) {
277 assert(check_access, "required");
278 next_receiver_method = callee->resolve_invoke(jvms->method()->holder(),
279 profile.receiver(1));
280 if (next_receiver_method != nullptr) {
281 next_hit_cg = this->call_generator(next_receiver_method,
282 vtable_index, !call_does_dispatch, jvms,
283 allow_inline, prof_factor);
284 if (next_hit_cg != nullptr && !next_hit_cg->is_inline() &&
285 have_major_receiver && UseOnlyInlinedBimorphic) {
286 // Skip if we can't inline second receiver's method
287 next_hit_cg = nullptr;
288 }
289 }
290 }
291 CallGenerator* miss_cg;
292 Deoptimization::DeoptReason reason = (morphism == 2
293 ? Deoptimization::Reason_bimorphic
294 : Deoptimization::reason_class_check(speculative_receiver_type != nullptr));
295 if ((morphism == 1 || (morphism == 2 && next_hit_cg != nullptr)) &&
296 !too_many_traps_or_recompiles(caller, bci, reason)
297 ) {
298 // Generate uncommon trap for class check failure path
299 // in case of monomorphic or bimorphic virtual call site.
300 miss_cg = CallGenerator::for_uncommon_trap(callee, reason,
301 Deoptimization::Action_maybe_recompile);
302 } else {
303 // Generate virtual call for class check failure path
304 // in case of polymorphic virtual call site.
305 miss_cg = (IncrementalInlineVirtual ? CallGenerator::for_late_inline_virtual(callee, vtable_index, prof_factor)
306 : CallGenerator::for_virtual_call(callee, vtable_index));
307 }
308 if (miss_cg != nullptr) {
309 if (next_hit_cg != nullptr) {
310 assert(speculative_receiver_type == nullptr, "shouldn't end up here if we used speculation");
311 trace_type_profile(C, jvms->method(), jvms, next_receiver_method, profile.receiver(1), site_count, profile.receiver_count(1));
312 // We don't need to record dependency on a receiver here and below.
313 // Whenever we inline, the dependency is added by Parse::Parse().
314 miss_cg = CallGenerator::for_predicted_call(profile.receiver(1), miss_cg, next_hit_cg, PROB_MAX);
315 }
316 if (miss_cg != nullptr) {
317 ciKlass* k = speculative_receiver_type != nullptr ? speculative_receiver_type : profile.receiver(0);
318 trace_type_profile(C, jvms->method(), jvms, receiver_method, k, site_count, receiver_count);
319 float hit_prob = speculative_receiver_type != nullptr ? 1.0 : profile.receiver_prob(0);
320 CallGenerator* cg = CallGenerator::for_predicted_call(k, miss_cg, hit_cg, hit_prob);
321 if (cg != nullptr) {
322 return cg;
323 }
324 }
325 }
326 }
327 }
328 }
329
330 // If there is only one implementor of this interface then we
331 // may be able to bind this invoke directly to the implementing
332 // klass but we need both a dependence on the single interface
333 // and on the method we bind to. Additionally since all we know
334 // about the receiver type is that it's supposed to implement the
335 // interface we have to insert a check that it's the class we
336 // expect. Interface types are not checked by the verifier so
337 // they are roughly equivalent to Object.
338 // The number of implementors for declared_interface is less or
339 // equal to the number of implementors for target->holder() so
340 // if number of implementors of target->holder() == 1 then
341 // number of implementors for decl_interface is 0 or 1. If
342 // it's 0 then no class implements decl_interface and there's
343 // no point in inlining.
344 if (call_does_dispatch && is_interface) {
345 ciInstanceKlass* declared_interface = nullptr;
346 if (orig_callee->intrinsic_id() == vmIntrinsics::_linkToInterface) {
347 // MemberName doesn't keep information about resolved interface class (REFC) once
348 // resolution is over, but resolved method holder (DECC) can be used as a
349 // conservative approximation.
350 declared_interface = callee->holder();
351 } else {
352 assert(!orig_callee->is_method_handle_intrinsic(), "not allowed");
353 declared_interface = caller->get_declared_method_holder_at_bci(bci)->as_instance_klass();
354 }
355 assert(declared_interface->is_interface(), "required");
356 ciInstanceKlass* singleton = declared_interface->unique_implementor();
357
358 if (singleton != nullptr) {
359 assert(singleton != declared_interface, "not a unique implementor");
360
361 ciMethod* cha_monomorphic_target =
362 callee->find_monomorphic_target(caller->holder(), declared_interface, singleton, check_access);
363
364 if (cha_monomorphic_target != nullptr &&
365 cha_monomorphic_target->holder() != env()->Object_klass()) { // subtype check against Object is useless
366 ciKlass* holder = cha_monomorphic_target->holder();
367
368 // Try to inline the method found by CHA. Inlined method is guarded by the type check.
369 CallGenerator* hit_cg = call_generator(cha_monomorphic_target,
370 vtable_index, !call_does_dispatch, jvms, allow_inline, prof_factor);
371
372 // Deoptimize on type check fail. The interpreter will throw ICCE for us.
373 CallGenerator* miss_cg = CallGenerator::for_uncommon_trap(callee,
374 Deoptimization::Reason_class_check, Deoptimization::Action_none);
375
376 ciKlass* constraint = (holder->is_subclass_of(singleton) ? holder : singleton); // avoid upcasts
377 CallGenerator* cg = CallGenerator::for_guarded_call(constraint, miss_cg, hit_cg);
378 if (hit_cg != nullptr && cg != nullptr) {
379 dependencies()->assert_unique_implementor(declared_interface, singleton);
380 dependencies()->assert_unique_concrete_method(declared_interface, cha_monomorphic_target, declared_interface, callee);
381 return cg;
382 }
383 }
384 }
385 } // call_does_dispatch && is_interface
386
387 // Nothing claimed the intrinsic, we go with straight-forward inlining
388 // for already discovered intrinsic.
389 if (allow_intrinsics && cg_intrinsic != nullptr) {
390 assert(cg_intrinsic->does_virtual_dispatch(), "sanity");
391 return cg_intrinsic;
392 }
393 } // allow_inline
394
395 // There was no special inlining tactic, or it bailed out.
396 // Use a more generic tactic, like a simple call.
397 if (call_does_dispatch) {
398 const char* msg = "virtual call";
399 C->inline_printer()->record(callee, jvms, InliningResult::FAILURE, msg);
400 C->log_inline_failure(msg);
401 if (IncrementalInlineVirtual && allow_inline) {
402 return CallGenerator::for_late_inline_virtual(callee, vtable_index, prof_factor); // attempt to inline through virtual call later
403 } else {
404 return CallGenerator::for_virtual_call(callee, vtable_index);
405 }
406 } else {
407 // Class Hierarchy Analysis or Type Profile reveals a unique target, or it is a static or special call.
408 CallGenerator* cg = CallGenerator::for_direct_call(callee, should_delay_inlining(callee, jvms));
409 // For optimized virtual calls assert at runtime that receiver object
410 // is a subtype of the method holder.
411 if (cg != nullptr && is_virtual_or_interface && !callee->is_static()) {
412 CallGenerator* trap_cg = CallGenerator::for_uncommon_trap(callee,
413 Deoptimization::Reason_receiver_constraint, Deoptimization::Action_none);
414 cg = CallGenerator::for_guarded_call(callee->holder(), trap_cg, cg);
415 }
416 return cg;
417 }
418 }
419
420 // Return true for methods that shouldn't be inlined early so that
421 // they are easier to analyze and optimize as intrinsics.
422 bool Compile::should_delay_string_inlining(ciMethod* call_method, JVMState* jvms) {
423 if (has_stringbuilder()) {
424
425 if ((call_method->holder() == C->env()->StringBuilder_klass() ||
426 call_method->holder() == C->env()->StringBuffer_klass()) &&
427 (jvms->method()->holder() == C->env()->StringBuilder_klass() ||
428 jvms->method()->holder() == C->env()->StringBuffer_klass())) {
429 // Delay SB calls only when called from non-SB code
430 return false;
431 }
432
433 switch (call_method->intrinsic_id()) {
434 case vmIntrinsics::_StringBuilder_void:
435 case vmIntrinsics::_StringBuilder_int:
436 case vmIntrinsics::_StringBuilder_String:
437 case vmIntrinsics::_StringBuilder_append_char:
438 case vmIntrinsics::_StringBuilder_append_int:
439 case vmIntrinsics::_StringBuilder_append_String:
440 case vmIntrinsics::_StringBuilder_toString:
441 case vmIntrinsics::_StringBuffer_void:
442 case vmIntrinsics::_StringBuffer_int:
443 case vmIntrinsics::_StringBuffer_String:
444 case vmIntrinsics::_StringBuffer_append_char:
445 case vmIntrinsics::_StringBuffer_append_int:
446 case vmIntrinsics::_StringBuffer_append_String:
447 case vmIntrinsics::_StringBuffer_toString:
448 case vmIntrinsics::_Integer_toString:
449 return true;
450
451 case vmIntrinsics::_String_String:
452 {
453 Node* receiver = jvms->map()->in(jvms->argoff() + 1);
454 if (receiver->is_Proj() && receiver->in(0)->is_CallStaticJava()) {
455 CallStaticJavaNode* csj = receiver->in(0)->as_CallStaticJava();
456 ciMethod* m = csj->method();
457 if (m != nullptr &&
458 (m->intrinsic_id() == vmIntrinsics::_StringBuffer_toString ||
459 m->intrinsic_id() == vmIntrinsics::_StringBuilder_toString))
460 // Delay String.<init>(new SB())
461 return true;
462 }
463 return false;
464 }
465
466 default:
467 return false;
468 }
469 }
470 return false;
471 }
472
473 bool Compile::should_delay_boxing_inlining(ciMethod* call_method, JVMState* jvms) {
474 if (eliminate_boxing() && call_method->is_boxing_method()) {
475 set_has_boxed_value(true);
476 return aggressive_unboxing();
477 }
478 return false;
479 }
480
481 bool Compile::should_delay_vector_inlining(ciMethod* call_method, JVMState* jvms) {
482 return EnableVectorSupport && call_method->is_vector_method();
483 }
484
485 bool Compile::should_delay_vector_reboxing_inlining(ciMethod* call_method, JVMState* jvms) {
486 return EnableVectorSupport && (call_method->intrinsic_id() == vmIntrinsics::_VectorRebox);
487 }
488
489 // uncommon-trap call-sites where callee is unloaded, uninitialized or will not link
490 bool Parse::can_not_compile_call_site(ciMethod *dest_method, ciInstanceKlass* klass) {
491 // Additional inputs to consider...
492 // bc = bc()
493 // caller = method()
494 // iter().get_method_holder_index()
495 assert( dest_method->is_loaded(), "ciTypeFlow should not let us get here" );
496 // Interface classes can be loaded & linked and never get around to
497 // being initialized. Uncommon-trap for not-initialized static or
498 // v-calls. Let interface calls happen.
499 ciInstanceKlass* holder_klass = dest_method->holder();
500 if (!holder_klass->is_being_initialized() &&
501 !holder_klass->is_initialized() &&
502 !holder_klass->is_interface()) {
503 uncommon_trap(Deoptimization::Reason_uninitialized,
504 Deoptimization::Action_reinterpret,
505 holder_klass);
506 return true;
507 }
508
509 assert(dest_method->is_loaded(), "dest_method: typeflow responsibility");
510 return false;
511 }
512
513 #ifdef ASSERT
514 static bool check_call_consistency(JVMState* jvms, CallGenerator* cg) {
515 ciMethod* symbolic_info = jvms->method()->get_method_at_bci(jvms->bci());
516 ciMethod* resolved_method = cg->method();
517 if (!ciMethod::is_consistent_info(symbolic_info, resolved_method)) {
518 tty->print_cr("JVMS:");
519 jvms->dump();
520 tty->print_cr("Bytecode info:");
521 jvms->method()->get_method_at_bci(jvms->bci())->print(); tty->cr();
522 tty->print_cr("Resolved method:");
523 cg->method()->print(); tty->cr();
524 return false;
525 }
526 return true;
527 }
528 #endif // ASSERT
529
530 //------------------------------do_call----------------------------------------
531 // Handle your basic call. Inline if we can & want to, else just setup call.
532 void Parse::do_call() {
533 // It's likely we are going to add debug info soon.
534 // Also, if we inline a guy who eventually needs debug info for this JVMS,
535 // our contribution to it is cleaned up right here.
536 kill_dead_locals();
537
538 // Set frequently used booleans
539 const bool is_virtual = bc() == Bytecodes::_invokevirtual;
540 const bool is_virtual_or_interface = is_virtual || bc() == Bytecodes::_invokeinterface;
541 const bool has_receiver = Bytecodes::has_receiver(bc());
542
543 // Find target being called
544 bool will_link;
545 ciSignature* declared_signature = nullptr;
546 ciMethod* orig_callee = iter().get_method(will_link, &declared_signature); // callee in the bytecode
547 ciInstanceKlass* holder_klass = orig_callee->holder();
548 ciKlass* holder = iter().get_declared_method_holder();
549 ciInstanceKlass* klass = ciEnv::get_instance_klass_for_declared_method_holder(holder);
550 assert(declared_signature != nullptr, "cannot be null");
551 JFR_ONLY(Jfr::on_resolution(this, holder, orig_callee);)
552
553 // Bump max node limit for JSR292 users
554 if (bc() == Bytecodes::_invokedynamic || orig_callee->is_method_handle_intrinsic()) {
555 C->set_max_node_limit(3*MaxNodeLimit);
556 }
557
558 // uncommon-trap when callee is unloaded, uninitialized or will not link
559 // bailout when too many arguments for register representation
560 if (!will_link || can_not_compile_call_site(orig_callee, klass)) {
561 if (PrintOpto && (Verbose || WizardMode)) {
562 method()->print_name(); tty->print_cr(" can not compile call at bci %d to:", bci());
563 orig_callee->print_name(); tty->cr();
564 }
565 return;
566 }
567 assert(holder_klass->is_loaded(), "");
568 //assert((bc_callee->is_static() || is_invokedynamic) == !has_receiver , "must match bc"); // XXX invokehandle (cur_bc_raw)
569 // Note: this takes into account invokeinterface of methods declared in java/lang/Object,
570 // which should be invokevirtuals but according to the VM spec may be invokeinterfaces
571 assert(holder_klass->is_interface() || holder_klass->super() == nullptr || (bc() != Bytecodes::_invokeinterface), "must match bc");
572 // Note: In the absence of miranda methods, an abstract class K can perform
573 // an invokevirtual directly on an interface method I.m if K implements I.
574
575 // orig_callee is the resolved callee which's signature includes the
576 // appendix argument.
577 const int nargs = orig_callee->arg_size();
578 const bool is_signature_polymorphic = MethodHandles::is_signature_polymorphic(orig_callee->intrinsic_id());
579
580 // Push appendix argument (MethodType, CallSite, etc.), if one.
581 if (iter().has_appendix()) {
582 ciObject* appendix_arg = iter().get_appendix();
583 const TypeOopPtr* appendix_arg_type = TypeOopPtr::make_from_constant(appendix_arg, /* require_const= */ true);
584 Node* appendix_arg_node = _gvn.makecon(appendix_arg_type);
585 push(appendix_arg_node);
586 }
587
588 // ---------------------
589 // Does Class Hierarchy Analysis reveal only a single target of a v-call?
590 // Then we may inline or make a static call, but become dependent on there being only 1 target.
591 // Does the call-site type profile reveal only one receiver?
592 // Then we may introduce a run-time check and inline on the path where it succeeds.
593 // The other path may uncommon_trap, check for another receiver, or do a v-call.
594
595 // Try to get the most accurate receiver type
596 ciMethod* callee = orig_callee;
597 int vtable_index = Method::invalid_vtable_index;
598 bool call_does_dispatch = false;
599
600 // Speculative type of the receiver if any
601 ciKlass* speculative_receiver_type = nullptr;
602 if (is_virtual_or_interface) {
603 Node* receiver_node = stack(sp() - nargs);
604 const TypeOopPtr* receiver_type = _gvn.type(receiver_node)->isa_oopptr();
605 // call_does_dispatch and vtable_index are out-parameters. They might be changed.
606 // For arrays, klass below is Object. When vtable calls are used,
607 // resolving the call with Object would allow an illegal call to
608 // finalize() on an array. We use holder instead: illegal calls to
609 // finalize() won't be compiled as vtable calls (IC call
610 // resolution will catch the illegal call) and the few legal calls
611 // on array types won't be either.
612 callee = C->optimize_virtual_call(method(), klass, holder, orig_callee,
613 receiver_type, is_virtual,
614 call_does_dispatch, vtable_index); // out-parameters
615 speculative_receiver_type = receiver_type != nullptr ? receiver_type->speculative_type() : nullptr;
616 }
617
618 // Additional receiver subtype checks for interface calls via invokespecial or invokeinterface.
619 ciKlass* receiver_constraint = nullptr;
620 if (iter().cur_bc_raw() == Bytecodes::_invokespecial && !orig_callee->is_object_constructor()) {
621 ciInstanceKlass* calling_klass = method()->holder();
622 ciInstanceKlass* sender_klass = calling_klass;
623 if (sender_klass->is_interface()) {
624 receiver_constraint = sender_klass;
625 }
626 } else if (iter().cur_bc_raw() == Bytecodes::_invokeinterface && orig_callee->is_private()) {
627 assert(holder->is_interface(), "How did we get a non-interface method here!");
628 receiver_constraint = holder;
629 }
630
631 if (receiver_constraint != nullptr) {
632 Node* receiver_node = stack(sp() - nargs);
633 Node* cls_node = makecon(TypeKlassPtr::make(receiver_constraint, Type::trust_interfaces));
634 Node* bad_type_ctrl = nullptr;
635 Node* casted_receiver = gen_checkcast(receiver_node, cls_node, &bad_type_ctrl);
636 if (bad_type_ctrl != nullptr) {
637 PreserveJVMState pjvms(this);
638 set_control(bad_type_ctrl);
639 uncommon_trap(Deoptimization::Reason_class_check,
640 Deoptimization::Action_none);
641 }
642 if (stopped()) {
643 return; // MUST uncommon-trap?
644 }
645 set_stack(sp() - nargs, casted_receiver);
646 }
647
648 // Note: It's OK to try to inline a virtual call.
649 // The call generator will not attempt to inline a polymorphic call
650 // unless it knows how to optimize the receiver dispatch.
651 bool try_inline = (C->do_inlining() || InlineAccessors);
652
653 // ---------------------
654 dec_sp(nargs); // Temporarily pop args for JVM state of call
655 JVMState* jvms = sync_jvms();
656
657 // ---------------------
658 // Decide call tactic.
659 // This call checks with CHA, the interpreter profile, intrinsics table, etc.
660 // It decides whether inlining is desirable or not.
661 CallGenerator* cg = C->call_generator(callee, vtable_index, call_does_dispatch, jvms, try_inline, prof_factor(), speculative_receiver_type);
662 if (failing()) {
663 return;
664 }
665 assert(cg != nullptr, "must find a CallGenerator for callee %s", callee->name()->as_utf8());
666
667 // NOTE: Don't use orig_callee and callee after this point! Use cg->method() instead.
668 orig_callee = callee = nullptr;
669
670 // ---------------------
671
672 // Feed profiling data for arguments to the type system so it can
673 // propagate it as speculative types
674 record_profiled_arguments_for_speculation(cg->method(), bc());
675
676 #ifndef PRODUCT
677 // bump global counters for calls
678 count_compiled_calls(/*at_method_entry*/ false, cg->is_inline());
679
680 // Record first part of parsing work for this call
681 parse_histogram()->record_change();
682 #endif // not PRODUCT
683
684 assert(jvms == this->jvms(), "still operating on the right JVMS");
685 assert(jvms_in_sync(), "jvms must carry full info into CG");
686
687 // save across call, for a subsequent cast_not_null.
688 Node* receiver = has_receiver ? argument(0) : nullptr;
689
690 // The extra CheckCastPPs for speculative types mess with PhaseStringOpts
691 if (receiver != nullptr && !call_does_dispatch && !cg->is_string_late_inline()) {
692 // Feed profiling data for a single receiver to the type system so
693 // it can propagate it as a speculative type
694 receiver = record_profiled_receiver_for_speculation(receiver);
695 }
696
697 JVMState* new_jvms = cg->generate(jvms);
698 if (new_jvms == nullptr) {
699 // When inlining attempt fails (e.g., too many arguments),
700 // it may contaminate the current compile state, making it
701 // impossible to pull back and try again. Once we call
702 // cg->generate(), we are committed. If it fails, the whole
703 // compilation task is compromised.
704 if (failing()) return;
705
706 // This can happen if a library intrinsic is available, but refuses
707 // the call site, perhaps because it did not match a pattern the
708 // intrinsic was expecting to optimize. Should always be possible to
709 // get a normal java call that may inline in that case
710 cg = C->call_generator(cg->method(), vtable_index, call_does_dispatch, jvms, try_inline, prof_factor(), speculative_receiver_type, /* allow_intrinsics= */ false);
711 new_jvms = cg->generate(jvms);
712 if (new_jvms == nullptr) {
713 guarantee(failing(), "call failed to generate: calls should work");
714 return;
715 }
716 }
717
718 if (cg->is_inline()) {
719 // Accumulate has_loops estimate
720 C->env()->notice_inlined_method(cg->method());
721 }
722
723 // Reset parser state from [new_]jvms, which now carries results of the call.
724 // Return value (if any) is already pushed on the stack by the cg.
725 add_exception_states_from(new_jvms);
726 if (new_jvms->map()->control() == top()) {
727 stop_and_kill_map();
728 } else {
729 assert(new_jvms->same_calls_as(jvms), "method/bci left unchanged");
730 set_jvms(new_jvms);
731 }
732
733 assert(check_call_consistency(jvms, cg), "inconsistent info");
734
735 if (!stopped()) {
736 // This was some sort of virtual call, which did a null check for us.
737 // Now we can assert receiver-not-null, on the normal return path.
738 if (receiver != nullptr && cg->is_virtual()) {
739 Node* cast = cast_not_null(receiver);
740 // %%% assert(receiver == cast, "should already have cast the receiver");
741 }
742
743 ciType* rtype = cg->method()->return_type();
744 ciType* ctype = declared_signature->return_type();
745
746 if (Bytecodes::has_optional_appendix(iter().cur_bc_raw()) || is_signature_polymorphic) {
747 // Be careful here with return types.
748 if (ctype != rtype) {
749 BasicType rt = rtype->basic_type();
750 BasicType ct = ctype->basic_type();
751 if (ct == T_VOID) {
752 // It's OK for a method to return a value that is discarded.
753 // The discarding does not require any special action from the caller.
754 // The Java code knows this, at VerifyType.isNullConversion.
755 pop_node(rt); // whatever it was, pop it
756 } else if (rt == T_INT || is_subword_type(rt)) {
757 // Nothing. These cases are handled in lambda form bytecode.
758 assert(ct == T_INT || is_subword_type(ct), "must match: rt=%s, ct=%s", type2name(rt), type2name(ct));
759 } else if (is_reference_type(rt)) {
760 assert(is_reference_type(ct), "rt=%s, ct=%s", type2name(rt), type2name(ct));
761 if (ctype->is_loaded()) {
762 const TypeOopPtr* arg_type = TypeOopPtr::make_from_klass(rtype->as_klass());
763 const Type* sig_type = TypeOopPtr::make_from_klass(ctype->as_klass());
764 if (arg_type != nullptr && !arg_type->higher_equal(sig_type)) {
765 Node* retnode = pop();
766 Node* cast_obj = _gvn.transform(new CheckCastPPNode(control(), retnode, sig_type));
767 push(cast_obj);
768 }
769 }
770 } else {
771 assert(rt == ct, "unexpected mismatch: rt=%s, ct=%s", type2name(rt), type2name(ct));
772 // push a zero; it's better than getting an oop/int mismatch
773 pop_node(rt);
774 Node* retnode = zerocon(ct);
775 push_node(ct, retnode);
776 }
777 // Now that the value is well-behaved, continue with the call-site type.
778 rtype = ctype;
779 }
780 } else {
781 // Symbolic resolution enforces the types to be the same.
782 // NOTE: We must relax the assert for unloaded types because two
783 // different ciType instances of the same unloaded class type
784 // can appear to be "loaded" by different loaders (depending on
785 // the accessing class).
786 assert(!rtype->is_loaded() || !ctype->is_loaded() || rtype == ctype,
787 "mismatched return types: rtype=%s, ctype=%s", rtype->name(), ctype->name());
788 }
789
790 // If the return type of the method is not loaded, assert that the
791 // value we got is a null. Otherwise, we need to recompile.
792 if (!rtype->is_loaded()) {
793 if (PrintOpto && (Verbose || WizardMode)) {
794 method()->print_name(); tty->print_cr(" asserting nullness of result at bci: %d", bci());
795 cg->method()->print_name(); tty->cr();
796 }
797 if (C->log() != nullptr) {
798 C->log()->elem("assert_null reason='return' klass='%d'",
799 C->log()->identify(rtype));
800 }
801 // If there is going to be a trap, put it at the next bytecode:
802 set_bci(iter().next_bci());
803 null_assert(peek());
804 set_bci(iter().cur_bci()); // put it back
805 }
806 BasicType ct = ctype->basic_type();
807 if (is_reference_type(ct)) {
808 record_profiled_return_for_speculation();
809 }
810
811 if (!rtype->is_void()) {
812 Node* retnode = peek();
813 const Type* rettype = gvn().type(retnode);
814 if (rettype->is_inlinetypeptr() && !retnode->is_InlineType()) {
815 retnode = InlineTypeNode::make_from_oop(this, retnode, rettype->inline_klass());
816 dec_sp(1);
817 push(retnode);
818 }
819 }
820
821 if (cg->method()->is_object_constructor() && receiver != nullptr && gvn().type(receiver)->is_inlinetypeptr()) {
822 InlineTypeNode* non_larval = InlineTypeNode::make_from_oop(this, receiver, gvn().type(receiver)->inline_klass());
823 // Relinquish the oop input, we will delay the allocation to the point it is needed, see the
824 // comments in InlineTypeNode::Ideal for more details
825 non_larval = non_larval->clone_if_required(&gvn(), nullptr);
826 non_larval->set_oop(gvn(), null());
827 non_larval->set_is_buffered(gvn(), false);
828 non_larval = gvn().transform(non_larval)->as_InlineType();
829 map()->replace_edge(receiver, non_larval);
830 }
831 }
832
833 // Restart record of parsing work after possible inlining of call
834 #ifndef PRODUCT
835 parse_histogram()->set_initial_state(bc());
836 #endif
837 }
838
839 //---------------------------catch_call_exceptions-----------------------------
840 // Put a Catch and CatchProj nodes behind a just-created call.
841 // Send their caught exceptions to the proper handler.
842 // This may be used after a call to the rethrow VM stub,
843 // when it is needed to process unloaded exception classes.
844 void Parse::catch_call_exceptions(ciExceptionHandlerStream& handlers) {
845 // Exceptions are delivered through this channel:
846 Node* i_o = this->i_o();
847
848 // Add a CatchNode.
849 Arena tmp_mem{mtCompiler};
850 GrowableArray<int> bcis(&tmp_mem, 8, 0, -1);
851 GrowableArray<const Type*> extypes(&tmp_mem, 8, 0, nullptr);
852 GrowableArray<int> saw_unloaded(&tmp_mem, 8, 0, -1);
853
854 bool default_handler = false;
855 for (; !handlers.is_done(); handlers.next()) {
856 ciExceptionHandler* h = handlers.handler();
857 int h_bci = h->handler_bci();
858 ciInstanceKlass* h_klass = h->is_catch_all() ? env()->Throwable_klass() : h->catch_klass();
859 // Do not introduce unloaded exception types into the graph:
860 if (!h_klass->is_loaded()) {
861 if (saw_unloaded.contains(h_bci)) {
862 /* We've already seen an unloaded exception with h_bci,
863 so don't duplicate. Duplication will cause the CatchNode to be
864 unnecessarily large. See 4713716. */
865 continue;
866 } else {
867 saw_unloaded.append(h_bci);
868 }
869 }
870 const Type* h_extype = TypeOopPtr::make_from_klass(h_klass);
871 // (We use make_from_klass because it respects UseUniqueSubclasses.)
872 h_extype = h_extype->join(TypeInstPtr::NOTNULL);
873 assert(!h_extype->empty(), "sanity");
874 // Note: It's OK if the BCIs repeat themselves.
875 bcis.append(h_bci);
876 extypes.append(h_extype);
877 if (h_bci == -1) {
878 default_handler = true;
879 }
880 }
881
882 if (!default_handler) {
883 bcis.append(-1);
884 const Type* extype = TypeOopPtr::make_from_klass(env()->Throwable_klass())->is_instptr();
885 extype = extype->join(TypeInstPtr::NOTNULL);
886 extypes.append(extype);
887 }
888
889 int len = bcis.length();
890 CatchNode *cn = new CatchNode(control(), i_o, len+1);
891 Node *catch_ = _gvn.transform(cn);
892
893 // now branch with the exception state to each of the (potential)
894 // handlers
895 for(int i=0; i < len; i++) {
896 // Setup JVM state to enter the handler.
897 PreserveJVMState pjvms(this);
898 // Locals are just copied from before the call.
899 // Get control from the CatchNode.
900 int handler_bci = bcis.at(i);
901 Node* ctrl = _gvn.transform( new CatchProjNode(catch_, i+1,handler_bci));
902 // This handler cannot happen?
903 if (ctrl == top()) continue;
904 set_control(ctrl);
905
906 // Create exception oop
907 const TypeInstPtr* extype = extypes.at(i)->is_instptr();
908 Node* ex_oop = _gvn.transform(new CreateExNode(extypes.at(i), ctrl, i_o));
909
910 // Handle unloaded exception classes.
911 if (saw_unloaded.contains(handler_bci)) {
912 // An unloaded exception type is coming here. Do an uncommon trap.
913 #ifndef PRODUCT
914 // We do not expect the same handler bci to take both cold unloaded
915 // and hot loaded exceptions. But, watch for it.
916 if (PrintOpto && (Verbose || WizardMode) && extype->is_loaded()) {
917 tty->print("Warning: Handler @%d takes mixed loaded/unloaded exceptions in ", bci());
918 method()->print_name(); tty->cr();
919 } else if (PrintOpto && (Verbose || WizardMode)) {
920 tty->print("Bailing out on unloaded exception type ");
921 extype->instance_klass()->print_name();
922 tty->print(" at bci:%d in ", bci());
923 method()->print_name(); tty->cr();
924 }
925 #endif
926 // Emit an uncommon trap instead of processing the block.
927 set_bci(handler_bci);
928 push_ex_oop(ex_oop);
929 uncommon_trap(Deoptimization::Reason_unloaded,
930 Deoptimization::Action_reinterpret,
931 extype->instance_klass(), "!loaded exception");
932 set_bci(iter().cur_bci()); // put it back
933 continue;
934 }
935
936 // go to the exception handler
937 if (handler_bci < 0) { // merge with corresponding rethrow node
938 throw_to_exit(make_exception_state(ex_oop));
939 } else { // Else jump to corresponding handle
940 push_ex_oop(ex_oop); // Clear stack and push just the oop.
941 merge_exception(handler_bci);
942 }
943 }
944
945 // The first CatchProj is for the normal return.
946 // (Note: If this is a call to rethrow_Java, this node goes dead.)
947 set_control(_gvn.transform( new CatchProjNode(catch_, CatchProjNode::fall_through_index, CatchProjNode::no_handler_bci)));
948 }
949
950
951 //----------------------------catch_inline_exceptions--------------------------
952 // Handle all exceptions thrown by an inlined method or individual bytecode.
953 // Common case 1: we have no handler, so all exceptions merge right into
954 // the rethrow case.
955 // Case 2: we have some handlers, with loaded exception klasses that have
956 // no subklasses. We do a Deutsch-Schiffman style type-check on the incoming
957 // exception oop and branch to the handler directly.
958 // Case 3: We have some handlers with subklasses or are not loaded at
959 // compile-time. We have to call the runtime to resolve the exception.
960 // So we insert a RethrowCall and all the logic that goes with it.
961 void Parse::catch_inline_exceptions(SafePointNode* ex_map) {
962 // Caller is responsible for saving away the map for normal control flow!
963 assert(stopped(), "call set_map(nullptr) first");
964 assert(method()->has_exception_handlers(), "don't come here w/o work to do");
965
966 Node* ex_node = saved_ex_oop(ex_map);
967 if (ex_node == top()) {
968 // No action needed.
969 return;
970 }
971 const TypeInstPtr* ex_type = _gvn.type(ex_node)->isa_instptr();
972 NOT_PRODUCT(if (ex_type==nullptr) tty->print_cr("*** Exception not InstPtr"));
973 if (ex_type == nullptr)
974 ex_type = TypeOopPtr::make_from_klass(env()->Throwable_klass())->is_instptr();
975
976 // determine potential exception handlers
977 ciExceptionHandlerStream handlers(method(), bci(),
978 ex_type->instance_klass(),
979 ex_type->klass_is_exact());
980
981 // Start executing from the given throw state. (Keep its stack, for now.)
982 // Get the exception oop as known at compile time.
983 ex_node = use_exception_state(ex_map);
984
985 // Get the exception oop klass from its header
986 Node* ex_klass_node = nullptr;
987 if (has_exception_handler() && !ex_type->klass_is_exact()) {
988 Node* p = basic_plus_adr( ex_node, ex_node, oopDesc::klass_offset_in_bytes());
989 ex_klass_node = _gvn.transform(LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeInstKlassPtr::OBJECT));
990
991 // Compute the exception klass a little more cleverly.
992 // Obvious solution is to simple do a LoadKlass from the 'ex_node'.
993 // However, if the ex_node is a PhiNode, I'm going to do a LoadKlass for
994 // each arm of the Phi. If I know something clever about the exceptions
995 // I'm loading the class from, I can replace the LoadKlass with the
996 // klass constant for the exception oop.
997 if (ex_node->is_Phi()) {
998 ex_klass_node = new PhiNode(ex_node->in(0), TypeInstKlassPtr::OBJECT);
999 for (uint i = 1; i < ex_node->req(); i++) {
1000 Node* ex_in = ex_node->in(i);
1001 if (ex_in == top() || ex_in == nullptr) {
1002 // This path was not taken.
1003 ex_klass_node->init_req(i, top());
1004 continue;
1005 }
1006 Node* p = basic_plus_adr(ex_in, ex_in, oopDesc::klass_offset_in_bytes());
1007 Node* k = _gvn.transform(LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeInstKlassPtr::OBJECT));
1008 ex_klass_node->init_req( i, k );
1009 }
1010 ex_klass_node = _gvn.transform(ex_klass_node);
1011 }
1012 }
1013
1014 // Scan the exception table for applicable handlers.
1015 // If none, we can call rethrow() and be done!
1016 // If precise (loaded with no subklasses), insert a D.S. style
1017 // pointer compare to the correct handler and loop back.
1018 // If imprecise, switch to the Rethrow VM-call style handling.
1019
1020 int remaining = handlers.count_remaining();
1021
1022 // iterate through all entries sequentially
1023 for (;!handlers.is_done(); handlers.next()) {
1024 ciExceptionHandler* handler = handlers.handler();
1025
1026 if (handler->is_rethrow()) {
1027 // If we fell off the end of the table without finding an imprecise
1028 // exception klass (and without finding a generic handler) then we
1029 // know this exception is not handled in this method. We just rethrow
1030 // the exception into the caller.
1031 throw_to_exit(make_exception_state(ex_node));
1032 return;
1033 }
1034
1035 // exception handler bci range covers throw_bci => investigate further
1036 int handler_bci = handler->handler_bci();
1037
1038 if (remaining == 1) {
1039 push_ex_oop(ex_node); // Push exception oop for handler
1040 if (PrintOpto && WizardMode) {
1041 tty->print_cr(" Catching every inline exception bci:%d -> handler_bci:%d", bci(), handler_bci);
1042 }
1043 // If this is a backwards branch in the bytecodes, add safepoint
1044 maybe_add_safepoint(handler_bci);
1045 merge_exception(handler_bci); // jump to handler
1046 return; // No more handling to be done here!
1047 }
1048
1049 // Get the handler's klass
1050 ciInstanceKlass* klass = handler->catch_klass();
1051
1052 if (!klass->is_loaded()) { // klass is not loaded?
1053 // fall through into catch_call_exceptions which will emit a
1054 // handler with an uncommon trap.
1055 break;
1056 }
1057
1058 if (klass->is_interface()) // should not happen, but...
1059 break; // bail out
1060
1061 // Check the type of the exception against the catch type
1062 const TypeKlassPtr *tk = TypeKlassPtr::make(klass);
1063 Node* con = _gvn.makecon(tk);
1064 Node* not_subtype_ctrl = gen_subtype_check(ex_klass_node, con);
1065 if (!stopped()) {
1066 PreserveJVMState pjvms(this);
1067 const TypeInstPtr* tinst = TypeOopPtr::make_from_klass_unique(klass)->cast_to_ptr_type(TypePtr::NotNull)->is_instptr();
1068 assert(klass->has_subklass() || tinst->klass_is_exact(), "lost exactness");
1069 Node* ex_oop = _gvn.transform(new CheckCastPPNode(control(), ex_node, tinst));
1070 push_ex_oop(ex_oop); // Push exception oop for handler
1071 if (PrintOpto && WizardMode) {
1072 tty->print(" Catching inline exception bci:%d -> handler_bci:%d -- ", bci(), handler_bci);
1073 klass->print_name();
1074 tty->cr();
1075 }
1076 // If this is a backwards branch in the bytecodes, add safepoint
1077 maybe_add_safepoint(handler_bci);
1078 merge_exception(handler_bci);
1079 }
1080 set_control(not_subtype_ctrl);
1081
1082 // Come here if exception does not match handler.
1083 // Carry on with more handler checks.
1084 --remaining;
1085 }
1086
1087 assert(!stopped(), "you should return if you finish the chain");
1088
1089 // Oops, need to call into the VM to resolve the klasses at runtime.
1090 kill_dead_locals();
1091
1092 { PreserveReexecuteState preexecs(this);
1093 // When throwing an exception, set the reexecute flag for deoptimization.
1094 // This is mostly needed to pass -XX:+VerifyStack sanity checks.
1095 jvms()->set_should_reexecute(true);
1096
1097 make_runtime_call(RC_NO_LEAF | RC_MUST_THROW,
1098 OptoRuntime::rethrow_Type(),
1099 OptoRuntime::rethrow_stub(),
1100 nullptr, nullptr,
1101 ex_node);
1102 }
1103
1104 // Rethrow is a pure call, no side effects, only a result.
1105 // The result cannot be allocated, so we use I_O
1106
1107 // Catch exceptions from the rethrow
1108 catch_call_exceptions(handlers);
1109 }
1110
1111
1112 // (Note: Moved add_debug_info into GraphKit::add_safepoint_edges.)
1113
1114
1115 #ifndef PRODUCT
1116 void Parse::count_compiled_calls(bool at_method_entry, bool is_inline) {
1117 if( CountCompiledCalls ) {
1118 if( at_method_entry ) {
1119 // bump invocation counter if top method (for statistics)
1120 if (CountCompiledCalls && depth() == 1) {
1121 const TypePtr* addr_type = TypeMetadataPtr::make(method());
1122 Node* adr1 = makecon(addr_type);
1123 Node* adr2 = basic_plus_adr(adr1, adr1, in_bytes(Method::compiled_invocation_counter_offset()));
1124 increment_counter(adr2);
1125 }
1126 } else if (is_inline) {
1127 switch (bc()) {
1128 case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_inlined_calls_addr()); break;
1129 case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_inlined_interface_calls_addr()); break;
1130 case Bytecodes::_invokestatic:
1131 case Bytecodes::_invokedynamic:
1132 case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_inlined_static_calls_addr()); break;
1133 default: fatal("unexpected call bytecode");
1134 }
1135 } else {
1136 switch (bc()) {
1137 case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_normal_calls_addr()); break;
1138 case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_interface_calls_addr()); break;
1139 case Bytecodes::_invokestatic:
1140 case Bytecodes::_invokedynamic:
1141 case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_static_calls_addr()); break;
1142 default: fatal("unexpected call bytecode");
1143 }
1144 }
1145 }
1146 }
1147 #endif //PRODUCT
1148
1149
1150 ciMethod* Compile::optimize_virtual_call(ciMethod* caller, ciInstanceKlass* klass,
1151 ciKlass* holder, ciMethod* callee,
1152 const TypeOopPtr* receiver_type, bool is_virtual,
1153 bool& call_does_dispatch, int& vtable_index,
1154 bool check_access) {
1155 // Set default values for out-parameters.
1156 call_does_dispatch = true;
1157 vtable_index = Method::invalid_vtable_index;
1158
1159 // Choose call strategy.
1160 ciMethod* optimized_virtual_method = optimize_inlining(caller, klass, holder, callee,
1161 receiver_type, check_access);
1162
1163 // Have the call been sufficiently improved such that it is no longer a virtual?
1164 if (optimized_virtual_method != nullptr) {
1165 callee = optimized_virtual_method;
1166 call_does_dispatch = false;
1167 } else if (!UseInlineCaches && is_virtual && callee->is_loaded()) {
1168 // We can make a vtable call at this site
1169 vtable_index = callee->resolve_vtable_index(caller->holder(), holder);
1170 }
1171 return callee;
1172 }
1173
1174 // Identify possible target method and inlining style
1175 ciMethod* Compile::optimize_inlining(ciMethod* caller, ciInstanceKlass* klass, ciKlass* holder,
1176 ciMethod* callee, const TypeOopPtr* receiver_type,
1177 bool check_access) {
1178 // only use for virtual or interface calls
1179
1180 // If it is obviously final, do not bother to call find_monomorphic_target,
1181 // because the class hierarchy checks are not needed, and may fail due to
1182 // incompletely loaded classes. Since we do our own class loading checks
1183 // in this module, we may confidently bind to any method.
1184 if (callee->can_be_statically_bound()) {
1185 return callee;
1186 }
1187
1188 if (receiver_type == nullptr) {
1189 return nullptr; // no receiver type info
1190 }
1191
1192 // Attempt to improve the receiver
1193 bool actual_receiver_is_exact = false;
1194 ciInstanceKlass* actual_receiver = klass;
1195 // Array methods are all inherited from Object, and are monomorphic.
1196 // finalize() call on array is not allowed.
1197 if (receiver_type->isa_aryptr() &&
1198 callee->holder() == env()->Object_klass() &&
1199 callee->name() != ciSymbols::finalize_method_name()) {
1200 return callee;
1201 }
1202
1203 // All other interesting cases are instance klasses.
1204 if (!receiver_type->isa_instptr()) {
1205 return nullptr;
1206 }
1207
1208 ciInstanceKlass* receiver_klass = receiver_type->is_instptr()->instance_klass();
1209 if (receiver_klass->is_loaded() && receiver_klass->is_initialized() && !receiver_klass->is_interface() &&
1210 (receiver_klass == actual_receiver || receiver_klass->is_subtype_of(actual_receiver))) {
1211 // ikl is a same or better type than the original actual_receiver,
1212 // e.g. static receiver from bytecodes.
1213 actual_receiver = receiver_klass;
1214 // Is the actual_receiver exact?
1215 actual_receiver_is_exact = receiver_type->klass_is_exact();
1216 }
1217
1218 ciInstanceKlass* calling_klass = caller->holder();
1219 ciMethod* cha_monomorphic_target = callee->find_monomorphic_target(calling_klass, klass, actual_receiver, check_access);
1220
1221 if (cha_monomorphic_target != nullptr) {
1222 // Hardwiring a virtual.
1223 assert(!callee->can_be_statically_bound(), "should have been handled earlier");
1224 assert(!cha_monomorphic_target->is_abstract(), "");
1225 if (!cha_monomorphic_target->can_be_statically_bound(actual_receiver)) {
1226 // If we inlined because CHA revealed only a single target method,
1227 // then we are dependent on that target method not getting overridden
1228 // by dynamic class loading. Be sure to test the "static" receiver
1229 // dest_method here, as opposed to the actual receiver, which may
1230 // falsely lead us to believe that the receiver is final or private.
1231 dependencies()->assert_unique_concrete_method(actual_receiver, cha_monomorphic_target, holder, callee);
1232 }
1233 return cha_monomorphic_target;
1234 }
1235
1236 // If the type is exact, we can still bind the method w/o a vcall.
1237 // (This case comes after CHA so we can see how much extra work it does.)
1238 if (actual_receiver_is_exact) {
1239 // In case of evolution, there is a dependence on every inlined method, since each
1240 // such method can be changed when its class is redefined.
1241 ciMethod* exact_method = callee->resolve_invoke(calling_klass, actual_receiver);
1242 if (exact_method != nullptr) {
1243 return exact_method;
1244 }
1245 }
1246
1247 return nullptr;
1248 }