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 // After Compile::over_inlining_cutoff, should we decline inlining the callee, or should we try
419 // inlining again later
420 bool Compile::should_delay_after_inlining_cutoff(ciMethod* callee, ciMethod* caller) {
421 if (!IncrementalInline) {
422 return false;
423 }
424
425 if (DelayAfterInliningCutoff) {
426 return true;
427 } else if (callee->force_inline() || caller->is_compiled_lambda_form()) {
428 return true;
429 } else {
430 return false;
431 }
432 }
433
434 // Return true for methods that shouldn't be inlined early so that
435 // they are easier to analyze and optimize as intrinsics.
436 bool Compile::should_delay_string_inlining(ciMethod* call_method, JVMState* jvms) {
437 if (has_stringbuilder()) {
438
439 if ((call_method->holder() == C->env()->StringBuilder_klass() ||
440 call_method->holder() == C->env()->StringBuffer_klass()) &&
441 (jvms->method()->holder() == C->env()->StringBuilder_klass() ||
442 jvms->method()->holder() == C->env()->StringBuffer_klass())) {
443 // Delay SB calls only when called from non-SB code
444 return false;
445 }
446
447 switch (call_method->intrinsic_id()) {
448 case vmIntrinsics::_StringBuilder_void:
449 case vmIntrinsics::_StringBuilder_int:
450 case vmIntrinsics::_StringBuilder_String:
451 case vmIntrinsics::_StringBuilder_append_char:
452 case vmIntrinsics::_StringBuilder_append_int:
453 case vmIntrinsics::_StringBuilder_append_String:
454 case vmIntrinsics::_StringBuilder_toString:
455 case vmIntrinsics::_StringBuffer_void:
456 case vmIntrinsics::_StringBuffer_int:
457 case vmIntrinsics::_StringBuffer_String:
458 case vmIntrinsics::_StringBuffer_append_char:
459 case vmIntrinsics::_StringBuffer_append_int:
460 case vmIntrinsics::_StringBuffer_append_String:
461 case vmIntrinsics::_StringBuffer_toString:
462 case vmIntrinsics::_Integer_toString:
463 return true;
464
465 case vmIntrinsics::_String_String:
466 {
467 Node* receiver = jvms->map()->in(jvms->argoff() + 1);
468 if (receiver->is_Proj() && receiver->in(0)->is_CallStaticJava()) {
469 CallStaticJavaNode* csj = receiver->in(0)->as_CallStaticJava();
470 ciMethod* m = csj->method();
471 if (m != nullptr &&
472 (m->intrinsic_id() == vmIntrinsics::_StringBuffer_toString ||
473 m->intrinsic_id() == vmIntrinsics::_StringBuilder_toString))
474 // Delay String.<init>(new SB())
475 return true;
476 }
477 return false;
478 }
479
480 default:
481 return false;
482 }
483 }
484 return false;
485 }
486
487 bool Compile::should_delay_boxing_inlining(ciMethod* call_method, JVMState* jvms) {
488 if (eliminate_boxing() && call_method->is_boxing_method()) {
489 set_has_boxed_value(true);
490 return aggressive_unboxing();
491 }
492 return false;
493 }
494
495 bool Compile::should_delay_vector_inlining(ciMethod* call_method, JVMState* jvms) {
496 return EnableVectorSupport && call_method->is_vector_method();
497 }
498
499 bool Compile::should_delay_vector_reboxing_inlining(ciMethod* call_method, JVMState* jvms) {
500 return EnableVectorSupport && (call_method->intrinsic_id() == vmIntrinsics::_VectorRebox);
501 }
502
503 // uncommon-trap call-sites where callee is unloaded, uninitialized or will not link
504 bool Parse::can_not_compile_call_site(ciMethod *dest_method, ciInstanceKlass* klass) {
505 // Additional inputs to consider...
506 // bc = bc()
507 // caller = method()
508 // iter().get_method_holder_index()
509 assert( dest_method->is_loaded(), "ciTypeFlow should not let us get here" );
510 // Interface classes can be loaded & linked and never get around to
511 // being initialized. Uncommon-trap for not-initialized static or
512 // v-calls. Let interface calls happen.
513 ciInstanceKlass* holder_klass = dest_method->holder();
514 if (!holder_klass->is_being_initialized() &&
515 !holder_klass->is_initialized() &&
516 !holder_klass->is_interface()) {
517 uncommon_trap(Deoptimization::Reason_uninitialized,
518 Deoptimization::Action_reinterpret,
519 holder_klass);
520 return true;
521 }
522
523 assert(dest_method->is_loaded(), "dest_method: typeflow responsibility");
524 return false;
525 }
526
527 #ifdef ASSERT
528 static bool check_call_consistency(JVMState* jvms, CallGenerator* cg) {
529 ciMethod* symbolic_info = jvms->method()->get_method_at_bci(jvms->bci());
530 ciMethod* resolved_method = cg->method();
531 if (!ciMethod::is_consistent_info(symbolic_info, resolved_method)) {
532 tty->print_cr("JVMS:");
533 jvms->dump();
534 tty->print_cr("Bytecode info:");
535 jvms->method()->get_method_at_bci(jvms->bci())->print(); tty->cr();
536 tty->print_cr("Resolved method:");
537 cg->method()->print(); tty->cr();
538 return false;
539 }
540 return true;
541 }
542 #endif // ASSERT
543
544 //------------------------------do_call----------------------------------------
545 // Handle your basic call. Inline if we can & want to, else just setup call.
546 void Parse::do_call() {
547 // It's likely we are going to add debug info soon.
548 // Also, if we inline a guy who eventually needs debug info for this JVMS,
549 // our contribution to it is cleaned up right here.
550 kill_dead_locals();
551
552 // Set frequently used booleans
553 const bool is_virtual = bc() == Bytecodes::_invokevirtual;
554 const bool is_virtual_or_interface = is_virtual || bc() == Bytecodes::_invokeinterface;
555 const bool has_receiver = Bytecodes::has_receiver(bc());
556
557 // Find target being called
558 bool will_link;
559 ciSignature* declared_signature = nullptr;
560 ciMethod* orig_callee = iter().get_method(will_link, &declared_signature); // callee in the bytecode
561 ciInstanceKlass* holder_klass = orig_callee->holder();
562 ciKlass* holder = iter().get_declared_method_holder();
563 ciInstanceKlass* klass = ciEnv::get_instance_klass_for_declared_method_holder(holder);
564 assert(declared_signature != nullptr, "cannot be null");
565 JFR_ONLY(Jfr::on_resolution(this, holder, orig_callee);)
566
567 // Bump max node limit for JSR292 users
568 if (bc() == Bytecodes::_invokedynamic || orig_callee->is_method_handle_intrinsic()) {
569 C->set_max_node_limit(3*MaxNodeLimit);
570 C->set_node_count_inlining_cutoff(LiveNodeCountInliningCutoff);
571 }
572
573 // uncommon-trap when callee is unloaded, uninitialized or will not link
574 // bailout when too many arguments for register representation
575 if (!will_link || can_not_compile_call_site(orig_callee, klass)) {
576 if (PrintOpto && (Verbose || WizardMode)) {
577 method()->print_name(); tty->print_cr(" can not compile call at bci %d to:", bci());
578 orig_callee->print_name(); tty->cr();
579 }
580 return;
581 }
582 assert(holder_klass->is_loaded(), "");
583 //assert((bc_callee->is_static() || is_invokedynamic) == !has_receiver , "must match bc"); // XXX invokehandle (cur_bc_raw)
584 // Note: this takes into account invokeinterface of methods declared in java/lang/Object,
585 // which should be invokevirtuals but according to the VM spec may be invokeinterfaces
586 assert(holder_klass->is_interface() || holder_klass->super() == nullptr || (bc() != Bytecodes::_invokeinterface), "must match bc");
587 // Note: In the absence of miranda methods, an abstract class K can perform
588 // an invokevirtual directly on an interface method I.m if K implements I.
589
590 // orig_callee is the resolved callee which's signature includes the
591 // appendix argument.
592 const int nargs = orig_callee->arg_size();
593 const bool is_signature_polymorphic = MethodHandles::is_signature_polymorphic(orig_callee->intrinsic_id());
594
595 // Push appendix argument (MethodType, CallSite, etc.), if one.
596 if (iter().has_appendix()) {
597 ciObject* appendix_arg = iter().get_appendix();
598 const TypeOopPtr* appendix_arg_type = TypeOopPtr::make_from_constant(appendix_arg, /* require_const= */ true);
599 Node* appendix_arg_node = _gvn.makecon(appendix_arg_type);
600 push(appendix_arg_node);
601 }
602
603 // ---------------------
604 // Does Class Hierarchy Analysis reveal only a single target of a v-call?
605 // Then we may inline or make a static call, but become dependent on there being only 1 target.
606 // Does the call-site type profile reveal only one receiver?
607 // Then we may introduce a run-time check and inline on the path where it succeeds.
608 // The other path may uncommon_trap, check for another receiver, or do a v-call.
609
610 // Try to get the most accurate receiver type
611 ciMethod* callee = orig_callee;
612 int vtable_index = Method::invalid_vtable_index;
613 bool call_does_dispatch = false;
614
615 // Speculative type of the receiver if any
616 ciKlass* speculative_receiver_type = nullptr;
617 if (is_virtual_or_interface) {
618 Node* receiver_node = stack(sp() - nargs);
619 const TypeOopPtr* receiver_type = _gvn.type(receiver_node)->isa_oopptr();
620 // call_does_dispatch and vtable_index are out-parameters. They might be changed.
621 // For arrays, klass below is Object. When vtable calls are used,
622 // resolving the call with Object would allow an illegal call to
623 // finalize() on an array. We use holder instead: illegal calls to
624 // finalize() won't be compiled as vtable calls (IC call
625 // resolution will catch the illegal call) and the few legal calls
626 // on array types won't be either.
627 callee = C->optimize_virtual_call(method(), klass, holder, orig_callee,
628 receiver_type, is_virtual,
629 call_does_dispatch, vtable_index); // out-parameters
630 speculative_receiver_type = receiver_type != nullptr ? receiver_type->speculative_type() : nullptr;
631 }
632
633 // Additional receiver subtype checks for interface calls via invokespecial or invokeinterface.
634 ciKlass* receiver_constraint = nullptr;
635 if (iter().cur_bc_raw() == Bytecodes::_invokespecial && !orig_callee->is_object_initializer()) {
636 ciInstanceKlass* calling_klass = method()->holder();
637 ciInstanceKlass* sender_klass = calling_klass;
638 if (sender_klass->is_interface()) {
639 receiver_constraint = sender_klass;
640 }
641 } else if (iter().cur_bc_raw() == Bytecodes::_invokeinterface && orig_callee->is_private()) {
642 assert(holder->is_interface(), "How did we get a non-interface method here!");
643 receiver_constraint = holder;
644 }
645
646 if (receiver_constraint != nullptr) {
647 Node* receiver_node = stack(sp() - nargs);
648 Node* cls_node = makecon(TypeKlassPtr::make(receiver_constraint, Type::trust_interfaces));
649 Node* bad_type_ctrl = nullptr;
650 Node* casted_receiver = gen_checkcast(receiver_node, cls_node, &bad_type_ctrl);
651 if (bad_type_ctrl != nullptr) {
652 PreserveJVMState pjvms(this);
653 set_control(bad_type_ctrl);
654 uncommon_trap(Deoptimization::Reason_class_check,
655 Deoptimization::Action_none);
656 }
657 if (stopped()) {
658 return; // MUST uncommon-trap?
659 }
660 set_stack(sp() - nargs, casted_receiver);
661 }
662
663 // Note: It's OK to try to inline a virtual call.
664 // The call generator will not attempt to inline a polymorphic call
665 // unless it knows how to optimize the receiver dispatch.
666 bool try_inline = (C->do_inlining() || InlineAccessors);
667
668 // ---------------------
669 dec_sp(nargs); // Temporarily pop args for JVM state of call
670 JVMState* jvms = sync_jvms();
671
672 // ---------------------
673 // Decide call tactic.
674 // This call checks with CHA, the interpreter profile, intrinsics table, etc.
675 // It decides whether inlining is desirable or not.
676 CallGenerator* cg = C->call_generator(callee, vtable_index, call_does_dispatch, jvms, try_inline, prof_factor(), speculative_receiver_type);
677
678 // NOTE: Don't use orig_callee and callee after this point! Use cg->method() instead.
679 orig_callee = callee = nullptr;
680
681 // ---------------------
682
683 // Feed profiling data for arguments to the type system so it can
684 // propagate it as speculative types
685 record_profiled_arguments_for_speculation(cg->method(), bc());
686
687 #ifndef PRODUCT
688 // bump global counters for calls
689 count_compiled_calls(/*at_method_entry*/ false, cg->is_inline());
690
691 // Record first part of parsing work for this call
692 parse_histogram()->record_change();
693 #endif // not PRODUCT
694
695 assert(jvms == this->jvms(), "still operating on the right JVMS");
696 assert(jvms_in_sync(), "jvms must carry full info into CG");
697
698 // save across call, for a subsequent cast_not_null.
699 Node* receiver = has_receiver ? argument(0) : nullptr;
700
701 // The extra CheckCastPPs for speculative types mess with PhaseStringOpts
702 if (receiver != nullptr && !call_does_dispatch && !cg->is_string_late_inline()) {
703 // Feed profiling data for a single receiver to the type system so
704 // it can propagate it as a speculative type
705 receiver = record_profiled_receiver_for_speculation(receiver);
706 }
707
708 JVMState* new_jvms = cg->generate(jvms);
709 if (new_jvms == nullptr) {
710 // When inlining attempt fails (e.g., too many arguments),
711 // it may contaminate the current compile state, making it
712 // impossible to pull back and try again. Once we call
713 // cg->generate(), we are committed. If it fails, the whole
714 // compilation task is compromised.
715 if (failing()) return;
716
717 // This can happen if a library intrinsic is available, but refuses
718 // the call site, perhaps because it did not match a pattern the
719 // intrinsic was expecting to optimize. Should always be possible to
720 // get a normal java call that may inline in that case
721 cg = C->call_generator(cg->method(), vtable_index, call_does_dispatch, jvms, try_inline, prof_factor(), speculative_receiver_type, /* allow_intrinsics= */ false);
722 new_jvms = cg->generate(jvms);
723 if (new_jvms == nullptr) {
724 guarantee(failing(), "call failed to generate: calls should work");
725 return;
726 }
727 }
728
729 if (cg->is_inline()) {
730 // Accumulate has_loops estimate
731 C->env()->notice_inlined_method(cg->method());
732 }
733
734 // Reset parser state from [new_]jvms, which now carries results of the call.
735 // Return value (if any) is already pushed on the stack by the cg.
736 add_exception_states_from(new_jvms);
737 if (new_jvms->map()->control() == top()) {
738 stop_and_kill_map();
739 } else {
740 assert(new_jvms->same_calls_as(jvms), "method/bci left unchanged");
741 set_jvms(new_jvms);
742 }
743
744 assert(check_call_consistency(jvms, cg), "inconsistent info");
745
746 if (!stopped()) {
747 // This was some sort of virtual call, which did a null check for us.
748 // Now we can assert receiver-not-null, on the normal return path.
749 if (receiver != nullptr && cg->is_virtual()) {
750 Node* cast = cast_not_null(receiver);
751 // %%% assert(receiver == cast, "should already have cast the receiver");
752 }
753
754 ciType* rtype = cg->method()->return_type();
755 ciType* ctype = declared_signature->return_type();
756
757 if (Bytecodes::has_optional_appendix(iter().cur_bc_raw()) || is_signature_polymorphic) {
758 // Be careful here with return types.
759 if (ctype != rtype) {
760 BasicType rt = rtype->basic_type();
761 BasicType ct = ctype->basic_type();
762 if (ct == T_VOID) {
763 // It's OK for a method to return a value that is discarded.
764 // The discarding does not require any special action from the caller.
765 // The Java code knows this, at VerifyType.isNullConversion.
766 pop_node(rt); // whatever it was, pop it
767 } else if (rt == T_INT || is_subword_type(rt)) {
768 // Nothing. These cases are handled in lambda form bytecode.
769 assert(ct == T_INT || is_subword_type(ct), "must match: rt=%s, ct=%s", type2name(rt), type2name(ct));
770 } else if (is_reference_type(rt)) {
771 assert(is_reference_type(ct), "rt=%s, ct=%s", type2name(rt), type2name(ct));
772 if (ctype->is_loaded()) {
773 const TypeOopPtr* arg_type = TypeOopPtr::make_from_klass(rtype->as_klass());
774 const Type* sig_type = TypeOopPtr::make_from_klass(ctype->as_klass());
775 if (arg_type != nullptr && !arg_type->higher_equal(sig_type)) {
776 Node* retnode = pop();
777 Node* cast_obj = _gvn.transform(new CheckCastPPNode(control(), retnode, sig_type));
778 push(cast_obj);
779 }
780 }
781 } else {
782 assert(rt == ct, "unexpected mismatch: rt=%s, ct=%s", type2name(rt), type2name(ct));
783 // push a zero; it's better than getting an oop/int mismatch
784 pop_node(rt);
785 Node* retnode = zerocon(ct);
786 push_node(ct, retnode);
787 }
788 // Now that the value is well-behaved, continue with the call-site type.
789 rtype = ctype;
790 }
791 } else {
792 // Symbolic resolution enforces the types to be the same.
793 // NOTE: We must relax the assert for unloaded types because two
794 // different ciType instances of the same unloaded class type
795 // can appear to be "loaded" by different loaders (depending on
796 // the accessing class).
797 assert(!rtype->is_loaded() || !ctype->is_loaded() || rtype == ctype,
798 "mismatched return types: rtype=%s, ctype=%s", rtype->name(), ctype->name());
799 }
800
801 // If the return type of the method is not loaded, assert that the
802 // value we got is a null. Otherwise, we need to recompile.
803 if (!rtype->is_loaded()) {
804 if (PrintOpto && (Verbose || WizardMode)) {
805 method()->print_name(); tty->print_cr(" asserting nullness of result at bci: %d", bci());
806 cg->method()->print_name(); tty->cr();
807 }
808 if (C->log() != nullptr) {
809 C->log()->elem("assert_null reason='return' klass='%d'",
810 C->log()->identify(rtype));
811 }
812 // If there is going to be a trap, put it at the next bytecode:
813 set_bci(iter().next_bci());
814 null_assert(peek());
815 set_bci(iter().cur_bci()); // put it back
816 }
817 BasicType ct = ctype->basic_type();
818 if (is_reference_type(ct)) {
819 record_profiled_return_for_speculation();
820 }
821 }
822
823 // Restart record of parsing work after possible inlining of call
824 #ifndef PRODUCT
825 parse_histogram()->set_initial_state(bc());
826 #endif
827 }
828
829 //---------------------------catch_call_exceptions-----------------------------
830 // Put a Catch and CatchProj nodes behind a just-created call.
831 // Send their caught exceptions to the proper handler.
832 // This may be used after a call to the rethrow VM stub,
833 // when it is needed to process unloaded exception classes.
834 void Parse::catch_call_exceptions(ciExceptionHandlerStream& handlers) {
835 // Exceptions are delivered through this channel:
836 Node* i_o = this->i_o();
837
838 // Add a CatchNode.
839 Arena tmp_mem{mtCompiler};
840 GrowableArray<int> bcis(&tmp_mem, 8, 0, -1);
841 GrowableArray<const Type*> extypes(&tmp_mem, 8, 0, nullptr);
842 GrowableArray<int> saw_unloaded(&tmp_mem, 8, 0, -1);
843
844 bool default_handler = false;
845 for (; !handlers.is_done(); handlers.next()) {
846 ciExceptionHandler* h = handlers.handler();
847 int h_bci = h->handler_bci();
848 ciInstanceKlass* h_klass = h->is_catch_all() ? env()->Throwable_klass() : h->catch_klass();
849 // Do not introduce unloaded exception types into the graph:
850 if (!h_klass->is_loaded()) {
851 if (saw_unloaded.contains(h_bci)) {
852 /* We've already seen an unloaded exception with h_bci,
853 so don't duplicate. Duplication will cause the CatchNode to be
854 unnecessarily large. See 4713716. */
855 continue;
856 } else {
857 saw_unloaded.append(h_bci);
858 }
859 }
860 const Type* h_extype = TypeOopPtr::make_from_klass(h_klass);
861 // (We use make_from_klass because it respects UseUniqueSubclasses.)
862 h_extype = h_extype->join(TypeInstPtr::NOTNULL);
863 assert(!h_extype->empty(), "sanity");
864 // Note: It's OK if the BCIs repeat themselves.
865 bcis.append(h_bci);
866 extypes.append(h_extype);
867 if (h_bci == -1) {
868 default_handler = true;
869 }
870 }
871
872 if (!default_handler) {
873 bcis.append(-1);
874 const Type* extype = TypeOopPtr::make_from_klass(env()->Throwable_klass())->is_instptr();
875 extype = extype->join(TypeInstPtr::NOTNULL);
876 extypes.append(extype);
877 }
878
879 int len = bcis.length();
880 CatchNode *cn = new CatchNode(control(), i_o, len+1);
881 Node *catch_ = _gvn.transform(cn);
882
883 // now branch with the exception state to each of the (potential)
884 // handlers
885 for(int i=0; i < len; i++) {
886 // Setup JVM state to enter the handler.
887 PreserveJVMState pjvms(this);
888 // Locals are just copied from before the call.
889 // Get control from the CatchNode.
890 int handler_bci = bcis.at(i);
891 Node* ctrl = _gvn.transform( new CatchProjNode(catch_, i+1,handler_bci));
892 // This handler cannot happen?
893 if (ctrl == top()) continue;
894 set_control(ctrl);
895
896 // Create exception oop
897 const TypeInstPtr* extype = extypes.at(i)->is_instptr();
898 Node* ex_oop = _gvn.transform(new CreateExNode(extypes.at(i), ctrl, i_o));
899
900 // Handle unloaded exception classes.
901 if (saw_unloaded.contains(handler_bci)) {
902 // An unloaded exception type is coming here. Do an uncommon trap.
903 #ifndef PRODUCT
904 // We do not expect the same handler bci to take both cold unloaded
905 // and hot loaded exceptions. But, watch for it.
906 if (PrintOpto && (Verbose || WizardMode) && extype->is_loaded()) {
907 tty->print("Warning: Handler @%d takes mixed loaded/unloaded exceptions in ", bci());
908 method()->print_name(); tty->cr();
909 } else if (PrintOpto && (Verbose || WizardMode)) {
910 tty->print("Bailing out on unloaded exception type ");
911 extype->instance_klass()->print_name();
912 tty->print(" at bci:%d in ", bci());
913 method()->print_name(); tty->cr();
914 }
915 #endif
916 // Emit an uncommon trap instead of processing the block.
917 set_bci(handler_bci);
918 push_ex_oop(ex_oop);
919 uncommon_trap(Deoptimization::Reason_unloaded,
920 Deoptimization::Action_reinterpret,
921 extype->instance_klass(), "!loaded exception");
922 set_bci(iter().cur_bci()); // put it back
923 continue;
924 }
925
926 // go to the exception handler
927 if (handler_bci < 0) { // merge with corresponding rethrow node
928 throw_to_exit(make_exception_state(ex_oop));
929 } else { // Else jump to corresponding handle
930 push_and_merge_exception(handler_bci, ex_oop);
931 }
932 }
933
934 // The first CatchProj is for the normal return.
935 // (Note: If this is a call to rethrow_Java, this node goes dead.)
936 set_control(_gvn.transform( new CatchProjNode(catch_, CatchProjNode::fall_through_index, CatchProjNode::no_handler_bci)));
937 }
938
939
940 //----------------------------catch_inline_exceptions--------------------------
941 // Handle all exceptions thrown by an inlined method or individual bytecode.
942 // Common case 1: we have no handler, so all exceptions merge right into
943 // the rethrow case.
944 // Case 2: we have some handlers, with loaded exception klasses that have
945 // no subklasses. We do a Deutsch-Schiffman style type-check on the incoming
946 // exception oop and branch to the handler directly.
947 // Case 3: We have some handlers with subklasses or are not loaded at
948 // compile-time. We have to call the runtime to resolve the exception.
949 // So we insert a RethrowCall and all the logic that goes with it.
950 void Parse::catch_inline_exceptions(SafePointNode* ex_map) {
951 // Caller is responsible for saving away the map for normal control flow!
952 assert(stopped(), "call set_map(nullptr) first");
953 assert(method()->has_exception_handlers(), "don't come here w/o work to do");
954
955 Node* ex_node = saved_ex_oop(ex_map);
956 if (ex_node == top()) {
957 // No action needed.
958 return;
959 }
960 const TypeInstPtr* ex_type = _gvn.type(ex_node)->isa_instptr();
961 NOT_PRODUCT(if (ex_type==nullptr) tty->print_cr("*** Exception not InstPtr"));
962 if (ex_type == nullptr)
963 ex_type = TypeOopPtr::make_from_klass(env()->Throwable_klass())->is_instptr();
964
965 // determine potential exception handlers
966 ciExceptionHandlerStream handlers(method(), bci(),
967 ex_type->instance_klass(),
968 ex_type->klass_is_exact());
969
970 // Start executing from the given throw state. (Keep its stack, for now.)
971 // Get the exception oop as known at compile time.
972 ex_node = use_exception_state(ex_map);
973
974 // Get the exception oop klass from its header
975 Node* ex_klass_node = nullptr;
976 if (has_exception_handler() && !ex_type->klass_is_exact()) {
977 Node* p = basic_plus_adr( ex_node, ex_node, oopDesc::klass_offset_in_bytes());
978 ex_klass_node = _gvn.transform(LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeInstKlassPtr::OBJECT));
979
980 // Compute the exception klass a little more cleverly.
981 // Obvious solution is to simple do a LoadKlass from the 'ex_node'.
982 // However, if the ex_node is a PhiNode, I'm going to do a LoadKlass for
983 // each arm of the Phi. If I know something clever about the exceptions
984 // I'm loading the class from, I can replace the LoadKlass with the
985 // klass constant for the exception oop.
986 if (ex_node->is_Phi()) {
987 ex_klass_node = new PhiNode(ex_node->in(0), TypeInstKlassPtr::OBJECT);
988 for (uint i = 1; i < ex_node->req(); i++) {
989 Node* ex_in = ex_node->in(i);
990 if (ex_in == top() || ex_in == nullptr) {
991 // This path was not taken.
992 ex_klass_node->init_req(i, top());
993 continue;
994 }
995 Node* p = basic_plus_adr(ex_in, ex_in, oopDesc::klass_offset_in_bytes());
996 Node* k = _gvn.transform(LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeInstKlassPtr::OBJECT));
997 ex_klass_node->init_req( i, k );
998 }
999 ex_klass_node = _gvn.transform(ex_klass_node);
1000 }
1001 }
1002
1003 // Scan the exception table for applicable handlers.
1004 // If none, we can call rethrow() and be done!
1005 // If precise (loaded with no subklasses), insert a D.S. style
1006 // pointer compare to the correct handler and loop back.
1007 // If imprecise, switch to the Rethrow VM-call style handling.
1008
1009 int remaining = handlers.count_remaining();
1010
1011 // iterate through all entries sequentially
1012 for (;!handlers.is_done(); handlers.next()) {
1013 ciExceptionHandler* handler = handlers.handler();
1014
1015 if (handler->is_rethrow()) {
1016 // If we fell off the end of the table without finding an imprecise
1017 // exception klass (and without finding a generic handler) then we
1018 // know this exception is not handled in this method. We just rethrow
1019 // the exception into the caller.
1020 throw_to_exit(make_exception_state(ex_node));
1021 return;
1022 }
1023
1024 // exception handler bci range covers throw_bci => investigate further
1025 int handler_bci = handler->handler_bci();
1026
1027 if (remaining == 1) {
1028 if (PrintOpto && WizardMode) {
1029 tty->print_cr(" Catching every inline exception bci:%d -> handler_bci:%d", bci(), handler_bci);
1030 }
1031 push_and_merge_exception(handler_bci, ex_node); // jump to handler
1032 return; // No more handling to be done here!
1033 }
1034
1035 // Get the handler's klass
1036 ciInstanceKlass* klass = handler->catch_klass();
1037
1038 if (!klass->is_loaded()) { // klass is not loaded?
1039 // fall through into catch_call_exceptions which will emit a
1040 // handler with an uncommon trap.
1041 break;
1042 }
1043
1044 if (klass->is_interface()) // should not happen, but...
1045 break; // bail out
1046
1047 // Check the type of the exception against the catch type
1048 const TypeKlassPtr *tk = TypeKlassPtr::make(klass);
1049 Node* con = _gvn.makecon(tk);
1050 Node* not_subtype_ctrl = gen_subtype_check(ex_klass_node, con);
1051 if (!stopped()) {
1052 PreserveJVMState pjvms(this);
1053 const TypeInstPtr* tinst = TypeOopPtr::make_from_klass_unique(klass)->cast_to_ptr_type(TypePtr::NotNull)->is_instptr();
1054 assert(klass->has_subklass() || tinst->klass_is_exact(), "lost exactness");
1055 Node* ex_oop = _gvn.transform(new CheckCastPPNode(control(), ex_node, tinst));
1056 if (PrintOpto && WizardMode) {
1057 tty->print(" Catching inline exception bci:%d -> handler_bci:%d -- ", bci(), handler_bci);
1058 klass->print_name();
1059 tty->cr();
1060 }
1061 // If this is a backwards branch in the bytecodes, add safepoint
1062 push_and_merge_exception(handler_bci, ex_oop);
1063 }
1064 set_control(not_subtype_ctrl);
1065
1066 // Come here if exception does not match handler.
1067 // Carry on with more handler checks.
1068 --remaining;
1069 }
1070
1071 assert(!stopped(), "you should return if you finish the chain");
1072
1073 // Oops, need to call into the VM to resolve the klasses at runtime.
1074 kill_dead_locals();
1075
1076 { PreserveReexecuteState preexecs(this);
1077 // When throwing an exception, set the reexecute flag for deoptimization.
1078 // This is mostly needed to pass -XX:+VerifyStack sanity checks.
1079 jvms()->set_should_reexecute(true);
1080
1081 make_runtime_call(RC_NO_LEAF | RC_MUST_THROW,
1082 OptoRuntime::rethrow_Type(),
1083 OptoRuntime::rethrow_stub(),
1084 nullptr, nullptr,
1085 ex_node);
1086 }
1087
1088 // Rethrow is a pure call, no side effects, only a result.
1089 // The result cannot be allocated, so we use I_O
1090
1091 // Catch exceptions from the rethrow
1092 catch_call_exceptions(handlers);
1093 }
1094
1095
1096 // (Note: Moved add_debug_info into GraphKit::add_safepoint_edges.)
1097
1098
1099 #ifndef PRODUCT
1100 void Parse::count_compiled_calls(bool at_method_entry, bool is_inline) {
1101 if (CountCompiledCalls) {
1102 if (at_method_entry) {
1103 // bump invocation counter if top method (for statistics)
1104 if (CountCompiledCalls && depth() == 1) {
1105 const TypePtr* addr_type = TypeMetadataPtr::make(method());
1106 Node* adr1 = makecon(addr_type);
1107 Node* adr2 = off_heap_plus_addr(adr1, in_bytes(Method::compiled_invocation_counter_offset()));
1108 increment_counter(adr2);
1109 }
1110 } else if (is_inline) {
1111 switch (bc()) {
1112 case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_inlined_calls_addr()); break;
1113 case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_inlined_interface_calls_addr()); break;
1114 case Bytecodes::_invokestatic:
1115 case Bytecodes::_invokedynamic:
1116 case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_inlined_static_calls_addr()); break;
1117 default: fatal("unexpected call bytecode");
1118 }
1119 } else {
1120 switch (bc()) {
1121 case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_normal_calls_addr()); break;
1122 case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_interface_calls_addr()); break;
1123 case Bytecodes::_invokestatic:
1124 case Bytecodes::_invokedynamic:
1125 case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_static_calls_addr()); break;
1126 default: fatal("unexpected call bytecode");
1127 }
1128 }
1129 }
1130 }
1131 #endif //PRODUCT
1132
1133
1134 ciMethod* Compile::optimize_virtual_call(ciMethod* caller, ciInstanceKlass* klass,
1135 ciKlass* holder, ciMethod* callee,
1136 const TypeOopPtr* receiver_type, bool is_virtual,
1137 bool& call_does_dispatch, int& vtable_index,
1138 bool check_access) {
1139 // Set default values for out-parameters.
1140 call_does_dispatch = true;
1141 vtable_index = Method::invalid_vtable_index;
1142
1143 // Choose call strategy.
1144 ciMethod* optimized_virtual_method = optimize_inlining(caller, klass, holder, callee,
1145 receiver_type, check_access);
1146
1147 // Have the call been sufficiently improved such that it is no longer a virtual?
1148 if (optimized_virtual_method != nullptr) {
1149 callee = optimized_virtual_method;
1150 call_does_dispatch = false;
1151 } else if (!UseInlineCaches && is_virtual && callee->is_loaded()) {
1152 // We can make a vtable call at this site
1153 vtable_index = callee->resolve_vtable_index(caller->holder(), holder);
1154 }
1155 return callee;
1156 }
1157
1158 // Identify possible target method and inlining style
1159 ciMethod* Compile::optimize_inlining(ciMethod* caller, ciInstanceKlass* klass, ciKlass* holder,
1160 ciMethod* callee, const TypeOopPtr* receiver_type,
1161 bool check_access) {
1162 // only use for virtual or interface calls
1163
1164 // If it is obviously final, do not bother to call find_monomorphic_target,
1165 // because the class hierarchy checks are not needed, and may fail due to
1166 // incompletely loaded classes. Since we do our own class loading checks
1167 // in this module, we may confidently bind to any method.
1168 if (callee->can_be_statically_bound()) {
1169 return callee;
1170 }
1171
1172 if (receiver_type == nullptr) {
1173 return nullptr; // no receiver type info
1174 }
1175
1176 // Attempt to improve the receiver
1177 bool actual_receiver_is_exact = false;
1178 ciInstanceKlass* actual_receiver = klass;
1179 // Array methods are all inherited from Object, and are monomorphic.
1180 // finalize() call on array is not allowed.
1181 if (receiver_type->isa_aryptr() &&
1182 callee->holder() == env()->Object_klass() &&
1183 callee->name() != ciSymbols::finalize_method_name()) {
1184 return callee;
1185 }
1186
1187 // All other interesting cases are instance klasses.
1188 if (!receiver_type->isa_instptr()) {
1189 return nullptr;
1190 }
1191
1192 ciInstanceKlass* receiver_klass = receiver_type->is_instptr()->instance_klass();
1193 if (receiver_klass->is_loaded() && receiver_klass->is_initialized() && !receiver_klass->is_interface() &&
1194 (receiver_klass == actual_receiver || receiver_klass->is_subtype_of(actual_receiver))) {
1195 // ikl is a same or better type than the original actual_receiver,
1196 // e.g. static receiver from bytecodes.
1197 actual_receiver = receiver_klass;
1198 // Is the actual_receiver exact?
1199 actual_receiver_is_exact = receiver_type->klass_is_exact();
1200 }
1201
1202 ciInstanceKlass* calling_klass = caller->holder();
1203 ciMethod* cha_monomorphic_target = callee->find_monomorphic_target(calling_klass, klass, actual_receiver, check_access);
1204
1205 if (cha_monomorphic_target != nullptr) {
1206 // Hardwiring a virtual.
1207 assert(!callee->can_be_statically_bound(), "should have been handled earlier");
1208 assert(!cha_monomorphic_target->is_abstract(), "");
1209 if (!cha_monomorphic_target->can_be_statically_bound(actual_receiver)) {
1210 // If we inlined because CHA revealed only a single target method,
1211 // then we are dependent on that target method not getting overridden
1212 // by dynamic class loading. Be sure to test the "static" receiver
1213 // dest_method here, as opposed to the actual receiver, which may
1214 // falsely lead us to believe that the receiver is final or private.
1215 dependencies()->assert_unique_concrete_method(actual_receiver, cha_monomorphic_target, holder, callee);
1216 }
1217 return cha_monomorphic_target;
1218 }
1219
1220 // If the type is exact, we can still bind the method w/o a vcall.
1221 // (This case comes after CHA so we can see how much extra work it does.)
1222 if (actual_receiver_is_exact) {
1223 // In case of evolution, there is a dependence on every inlined method, since each
1224 // such method can be changed when its class is redefined.
1225 ciMethod* exact_method = callee->resolve_invoke(calling_klass, actual_receiver);
1226 if (exact_method != nullptr) {
1227 return exact_method;
1228 }
1229 }
1230
1231 return nullptr;
1232 }
--- EOF ---