1 /*
2 * Copyright (c) 1998, 2023, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "ci/ciCallSite.hpp"
27 #include "ci/ciMethodHandle.hpp"
28 #include "ci/ciSymbols.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "compiler/compileBroker.hpp"
31 #include "compiler/compileLog.hpp"
32 #include "interpreter/linkResolver.hpp"
33 #include "logging/log.hpp"
34 #include "logging/logLevel.hpp"
35 #include "logging/logMessage.hpp"
36 #include "logging/logStream.hpp"
37 #include "opto/addnode.hpp"
38 #include "opto/callGenerator.hpp"
39 #include "opto/castnode.hpp"
40 #include "opto/cfgnode.hpp"
41 #include "opto/mulnode.hpp"
42 #include "opto/parse.hpp"
43 #include "opto/rootnode.hpp"
44 #include "opto/runtime.hpp"
45 #include "opto/subnode.hpp"
46 #include "prims/methodHandles.hpp"
47 #include "runtime/sharedRuntime.hpp"
48 #include "utilities/macros.hpp"
49 #if INCLUDE_JFR
50 #include "jfr/jfr.hpp"
51 #endif
52
53 void print_trace_type_profile(outputStream* out, int depth, ciKlass* prof_klass, int site_count, int receiver_count) {
54 CompileTask::print_inline_indent(depth, out);
55 out->print(" \\-> TypeProfile (%d/%d counts) = ", receiver_count, site_count);
56 prof_klass->name()->print_symbol_on(out);
57 out->cr();
58 }
59
60 void trace_type_profile(Compile* C, ciMethod* method, int depth, int bci, ciMethod* prof_method,
61 ciKlass* prof_klass, int site_count, int receiver_count) {
62 if (TraceTypeProfile || C->print_inlining()) {
63 outputStream* out = tty;
64 if (!C->print_inlining()) {
65 if (!PrintOpto && !PrintCompilation) {
66 method->print_short_name();
67 tty->cr();
68 }
69 CompileTask::print_inlining_tty(prof_method, depth, bci, InliningResult::SUCCESS);
70 } else {
71 out = C->print_inlining_stream();
72 }
73 print_trace_type_profile(out, depth, prof_klass, site_count, receiver_count);
74 }
75
76 LogTarget(Debug, jit, inlining) lt;
77 if (lt.is_enabled()) {
78 LogStream ls(lt);
79 print_trace_type_profile(&ls, depth, prof_klass, site_count, receiver_count);
80 }
81 }
82
83 CallGenerator* Compile::call_generator(ciMethod* callee, int vtable_index, bool call_does_dispatch,
84 JVMState* jvms, bool allow_inline,
85 float prof_factor, ciKlass* speculative_receiver_type,
86 bool allow_intrinsics) {
87 assert(callee != nullptr, "failed method resolution");
88
89 ciMethod* caller = jvms->method();
90 int bci = jvms->bci();
91 Bytecodes::Code bytecode = caller->java_code_at_bci(bci);
92 ciMethod* orig_callee = caller->get_method_at_bci(bci);
93
94 const bool is_virtual_or_interface = (bytecode == Bytecodes::_invokevirtual) ||
95 (bytecode == Bytecodes::_invokeinterface) ||
96 (orig_callee->intrinsic_id() == vmIntrinsics::_linkToVirtual) ||
97 (orig_callee->intrinsic_id() == vmIntrinsics::_linkToInterface);
98
99 // Dtrace currently doesn't work unless all calls are vanilla
100 if (env()->dtrace_method_probes()) {
101 allow_inline = false;
102 }
103
104 // Note: When we get profiling during stage-1 compiles, we want to pull
105 // from more specific profile data which pertains to this inlining.
106 // Right now, ignore the information in jvms->caller(), and do method[bci].
107 ciCallProfile profile = caller->call_profile_at_bci(bci);
108
109 // See how many times this site has been invoked.
110 int site_count = profile.count();
111 int receiver_count = -1;
112 if (call_does_dispatch && UseTypeProfile && profile.has_receiver(0)) {
113 // Receivers in the profile structure are ordered by call counts
114 // so that the most called (major) receiver is profile.receiver(0).
115 receiver_count = profile.receiver_count(0);
116 }
117
118 CompileLog* log = this->log();
119 if (log != nullptr) {
120 int rid = (receiver_count >= 0)? log->identify(profile.receiver(0)): -1;
121 int r2id = (rid != -1 && profile.has_receiver(1))? log->identify(profile.receiver(1)):-1;
122 log->begin_elem("call method='%d' count='%d' prof_factor='%f'",
123 log->identify(callee), site_count, prof_factor);
124 if (call_does_dispatch) log->print(" virtual='1'");
125 if (allow_inline) log->print(" inline='1'");
126 if (receiver_count >= 0) {
127 log->print(" receiver='%d' receiver_count='%d'", rid, receiver_count);
128 if (profile.has_receiver(1)) {
129 log->print(" receiver2='%d' receiver2_count='%d'", r2id, profile.receiver_count(1));
130 }
131 }
132 if (callee->is_method_handle_intrinsic()) {
133 log->print(" method_handle_intrinsic='1'");
134 }
135 log->end_elem();
136 }
137
138 // Special case the handling of certain common, profitable library
139 // methods. If these methods are replaced with specialized code,
140 // then we return it as the inlined version of the call.
141 CallGenerator* cg_intrinsic = nullptr;
142 if (allow_inline && allow_intrinsics) {
143 CallGenerator* cg = find_intrinsic(callee, call_does_dispatch);
144 if (cg != nullptr) {
145 if (cg->is_predicated()) {
146 // Code without intrinsic but, hopefully, inlined.
147 CallGenerator* inline_cg = this->call_generator(callee,
148 vtable_index, call_does_dispatch, jvms, allow_inline, prof_factor, speculative_receiver_type, false);
149 if (inline_cg != nullptr) {
150 cg = CallGenerator::for_predicated_intrinsic(cg, inline_cg);
151 }
152 }
153
154 // If intrinsic does the virtual dispatch, we try to use the type profile
155 // first, and hopefully inline it as the regular virtual call below.
156 // We will retry the intrinsic if nothing had claimed it afterwards.
157 if (cg->does_virtual_dispatch()) {
158 cg_intrinsic = cg;
159 cg = nullptr;
160 } else if (IncrementalInline && should_delay_vector_inlining(callee, jvms)) {
161 return CallGenerator::for_late_inline(callee, cg);
162 } else {
163 return cg;
164 }
165 }
166 }
167
168 // Do method handle calls.
169 // NOTE: This must happen before normal inlining logic below since
170 // MethodHandle.invoke* are native methods which obviously don't
171 // have bytecodes and so normal inlining fails.
172 if (callee->is_method_handle_intrinsic()) {
173 CallGenerator* cg = CallGenerator::for_method_handle_call(jvms, caller, callee, allow_inline);
174 return cg;
175 }
176
177 // Attempt to inline...
178 if (allow_inline) {
179 // The profile data is only partly attributable to this caller,
180 // scale back the call site information.
181 float past_uses = jvms->method()->scale_count(site_count, prof_factor);
182 // This is the number of times we expect the call code to be used.
183 float expected_uses = past_uses;
184
185 // Try inlining a bytecoded method:
186 if (!call_does_dispatch) {
187 InlineTree* ilt = InlineTree::find_subtree_from_root(this->ilt(), jvms->caller(), jvms->method());
188 bool should_delay = C->should_delay_inlining();
189 if (ilt->ok_to_inline(callee, jvms, profile, should_delay)) {
190 CallGenerator* cg = CallGenerator::for_inline(callee, expected_uses);
191 // For optimized virtual calls assert at runtime that receiver object
192 // is a subtype of the inlined method holder. CHA can report a method
193 // as a unique target under an abstract method, but receiver type
194 // sometimes has a broader type. Similar scenario is possible with
195 // default methods when type system loses information about implemented
196 // interfaces.
197 if (cg != nullptr && is_virtual_or_interface && !callee->is_static()) {
198 CallGenerator* trap_cg = CallGenerator::for_uncommon_trap(callee,
199 Deoptimization::Reason_receiver_constraint, Deoptimization::Action_none);
200
201 cg = CallGenerator::for_guarded_call(callee->holder(), trap_cg, cg);
202 }
203 if (cg != nullptr) {
204 // Delay the inlining of this method to give us the
205 // opportunity to perform some high level optimizations
206 // first.
207 if (should_delay) {
208 return CallGenerator::for_late_inline(callee, cg);
209 } else if (should_delay_string_inlining(callee, jvms)) {
210 return CallGenerator::for_string_late_inline(callee, cg);
211 } else if (should_delay_boxing_inlining(callee, jvms)) {
212 return CallGenerator::for_boxing_late_inline(callee, cg);
213 } else if (should_delay_vector_reboxing_inlining(callee, jvms)) {
214 return CallGenerator::for_vector_reboxing_late_inline(callee, cg);
215 } else {
216 return cg;
217 }
218 }
219 }
220 }
221
222 // Try using the type profile.
223 if (call_does_dispatch && site_count > 0 && UseTypeProfile) {
224 // The major receiver's count >= TypeProfileMajorReceiverPercent of site_count.
225 bool have_major_receiver = profile.has_receiver(0) && (100.*profile.receiver_prob(0) >= (float)TypeProfileMajorReceiverPercent);
226 ciMethod* receiver_method = nullptr;
227
228 int morphism = profile.morphism();
229 if (speculative_receiver_type != nullptr) {
230 if (!too_many_traps_or_recompiles(caller, bci, Deoptimization::Reason_speculate_class_check)) {
231 // We have a speculative type, we should be able to resolve
232 // the call. We do that before looking at the profiling at
233 // this invoke because it may lead to bimorphic inlining which
234 // a speculative type should help us avoid.
235 receiver_method = callee->resolve_invoke(jvms->method()->holder(),
236 speculative_receiver_type);
237 if (receiver_method == nullptr) {
238 speculative_receiver_type = nullptr;
239 } else {
240 morphism = 1;
241 }
242 } else {
243 // speculation failed before. Use profiling at the call
244 // (could allow bimorphic inlining for instance).
245 speculative_receiver_type = nullptr;
246 }
247 }
248 if (receiver_method == nullptr &&
249 (have_major_receiver || morphism == 1 ||
250 (morphism == 2 && UseBimorphicInlining))) {
251 // receiver_method = profile.method();
252 // Profiles do not suggest methods now. Look it up in the major receiver.
253 receiver_method = callee->resolve_invoke(jvms->method()->holder(),
254 profile.receiver(0));
255 }
256 if (receiver_method != nullptr) {
257 // The single majority receiver sufficiently outweighs the minority.
258 CallGenerator* hit_cg = this->call_generator(receiver_method,
259 vtable_index, !call_does_dispatch, jvms, allow_inline, prof_factor);
260 if (hit_cg != nullptr) {
261 // Look up second receiver.
262 CallGenerator* next_hit_cg = nullptr;
263 ciMethod* next_receiver_method = nullptr;
264 if (morphism == 2 && UseBimorphicInlining) {
265 next_receiver_method = callee->resolve_invoke(jvms->method()->holder(),
266 profile.receiver(1));
267 if (next_receiver_method != nullptr) {
268 next_hit_cg = this->call_generator(next_receiver_method,
269 vtable_index, !call_does_dispatch, jvms,
270 allow_inline, prof_factor);
271 if (next_hit_cg != nullptr && !next_hit_cg->is_inline() &&
272 have_major_receiver && UseOnlyInlinedBimorphic) {
273 // Skip if we can't inline second receiver's method
274 next_hit_cg = nullptr;
275 }
276 }
277 }
278 CallGenerator* miss_cg;
279 Deoptimization::DeoptReason reason = (morphism == 2
280 ? Deoptimization::Reason_bimorphic
281 : Deoptimization::reason_class_check(speculative_receiver_type != nullptr));
282 if ((morphism == 1 || (morphism == 2 && next_hit_cg != nullptr)) &&
283 !too_many_traps_or_recompiles(caller, bci, reason)
284 ) {
285 // Generate uncommon trap for class check failure path
286 // in case of monomorphic or bimorphic virtual call site.
287 miss_cg = CallGenerator::for_uncommon_trap(callee, reason,
288 Deoptimization::Action_maybe_recompile);
289 } else {
290 // Generate virtual call for class check failure path
291 // in case of polymorphic virtual call site.
292 miss_cg = (IncrementalInlineVirtual ? CallGenerator::for_late_inline_virtual(callee, vtable_index, prof_factor)
293 : CallGenerator::for_virtual_call(callee, vtable_index));
294 }
295 if (miss_cg != nullptr) {
296 if (next_hit_cg != nullptr) {
297 assert(speculative_receiver_type == nullptr, "shouldn't end up here if we used speculation");
298 trace_type_profile(C, jvms->method(), jvms->depth() - 1, jvms->bci(), next_receiver_method, profile.receiver(1), site_count, profile.receiver_count(1));
299 // We don't need to record dependency on a receiver here and below.
300 // Whenever we inline, the dependency is added by Parse::Parse().
301 miss_cg = CallGenerator::for_predicted_call(profile.receiver(1), miss_cg, next_hit_cg, PROB_MAX);
302 }
303 if (miss_cg != nullptr) {
304 ciKlass* k = speculative_receiver_type != nullptr ? speculative_receiver_type : profile.receiver(0);
305 trace_type_profile(C, jvms->method(), jvms->depth() - 1, jvms->bci(), receiver_method, k, site_count, receiver_count);
306 float hit_prob = speculative_receiver_type != nullptr ? 1.0 : profile.receiver_prob(0);
307 CallGenerator* cg = CallGenerator::for_predicted_call(k, miss_cg, hit_cg, hit_prob);
308 if (cg != nullptr) return cg;
309 }
310 }
311 }
312 }
313 }
314
315 // If there is only one implementor of this interface then we
316 // may be able to bind this invoke directly to the implementing
317 // klass but we need both a dependence on the single interface
318 // and on the method we bind to. Additionally since all we know
319 // about the receiver type is that it's supposed to implement the
320 // interface we have to insert a check that it's the class we
321 // expect. Interface types are not checked by the verifier so
322 // they are roughly equivalent to Object.
323 // The number of implementors for declared_interface is less or
324 // equal to the number of implementors for target->holder() so
325 // if number of implementors of target->holder() == 1 then
326 // number of implementors for decl_interface is 0 or 1. If
327 // it's 0 then no class implements decl_interface and there's
328 // no point in inlining.
329 if (call_does_dispatch && bytecode == Bytecodes::_invokeinterface) {
330 ciInstanceKlass* declared_interface =
331 caller->get_declared_method_holder_at_bci(bci)->as_instance_klass();
332 ciInstanceKlass* singleton = declared_interface->unique_implementor();
333
334 if (singleton != nullptr) {
335 assert(singleton != declared_interface, "not a unique implementor");
336
337 ciMethod* cha_monomorphic_target =
338 callee->find_monomorphic_target(caller->holder(), declared_interface, singleton);
339
340 if (cha_monomorphic_target != nullptr &&
341 cha_monomorphic_target->holder() != env()->Object_klass()) { // subtype check against Object is useless
342 ciKlass* holder = cha_monomorphic_target->holder();
343
344 // Try to inline the method found by CHA. Inlined method is guarded by the type check.
345 CallGenerator* hit_cg = call_generator(cha_monomorphic_target,
346 vtable_index, !call_does_dispatch, jvms, allow_inline, prof_factor);
347
348 // Deoptimize on type check fail. The interpreter will throw ICCE for us.
349 CallGenerator* miss_cg = CallGenerator::for_uncommon_trap(callee,
350 Deoptimization::Reason_class_check, Deoptimization::Action_none);
351
352 ciKlass* constraint = (holder->is_subclass_of(singleton) ? holder : singleton); // avoid upcasts
353 CallGenerator* cg = CallGenerator::for_guarded_call(constraint, miss_cg, hit_cg);
354 if (hit_cg != nullptr && cg != nullptr) {
355 dependencies()->assert_unique_implementor(declared_interface, singleton);
356 dependencies()->assert_unique_concrete_method(declared_interface, cha_monomorphic_target, declared_interface, callee);
357 return cg;
358 }
359 }
360 }
361 } // call_does_dispatch && bytecode == Bytecodes::_invokeinterface
362
363 // Nothing claimed the intrinsic, we go with straight-forward inlining
364 // for already discovered intrinsic.
365 if (allow_intrinsics && cg_intrinsic != nullptr) {
366 assert(cg_intrinsic->does_virtual_dispatch(), "sanity");
367 return cg_intrinsic;
368 }
369 } // allow_inline
370
371 // There was no special inlining tactic, or it bailed out.
372 // Use a more generic tactic, like a simple call.
373 if (call_does_dispatch) {
374 const char* msg = "virtual call";
375 if (C->print_inlining()) {
376 print_inlining(callee, jvms->depth() - 1, jvms->bci(), InliningResult::FAILURE, msg);
377 }
378 C->log_inline_failure(msg);
379 if (IncrementalInlineVirtual && allow_inline) {
380 return CallGenerator::for_late_inline_virtual(callee, vtable_index, prof_factor); // attempt to inline through virtual call later
381 } else {
382 return CallGenerator::for_virtual_call(callee, vtable_index);
383 }
384 } else {
385 // Class Hierarchy Analysis or Type Profile reveals a unique target, or it is a static or special call.
386 CallGenerator* cg = CallGenerator::for_direct_call(callee, should_delay_inlining(callee, jvms));
387 // For optimized virtual calls assert at runtime that receiver object
388 // is a subtype of the method holder.
389 if (cg != nullptr && is_virtual_or_interface && !callee->is_static()) {
390 CallGenerator* trap_cg = CallGenerator::for_uncommon_trap(callee,
391 Deoptimization::Reason_receiver_constraint, Deoptimization::Action_none);
392 cg = CallGenerator::for_guarded_call(callee->holder(), trap_cg, cg);
393 }
394 return cg;
395 }
396 }
397
398 // Return true for methods that shouldn't be inlined early so that
399 // they are easier to analyze and optimize as intrinsics.
400 bool Compile::should_delay_string_inlining(ciMethod* call_method, JVMState* jvms) {
401 if (has_stringbuilder()) {
402
403 if ((call_method->holder() == C->env()->StringBuilder_klass() ||
404 call_method->holder() == C->env()->StringBuffer_klass()) &&
405 (jvms->method()->holder() == C->env()->StringBuilder_klass() ||
406 jvms->method()->holder() == C->env()->StringBuffer_klass())) {
407 // Delay SB calls only when called from non-SB code
408 return false;
409 }
410
411 switch (call_method->intrinsic_id()) {
412 case vmIntrinsics::_StringBuilder_void:
413 case vmIntrinsics::_StringBuilder_int:
414 case vmIntrinsics::_StringBuilder_String:
415 case vmIntrinsics::_StringBuilder_append_char:
416 case vmIntrinsics::_StringBuilder_append_int:
417 case vmIntrinsics::_StringBuilder_append_String:
418 case vmIntrinsics::_StringBuilder_toString:
419 case vmIntrinsics::_StringBuffer_void:
420 case vmIntrinsics::_StringBuffer_int:
421 case vmIntrinsics::_StringBuffer_String:
422 case vmIntrinsics::_StringBuffer_append_char:
423 case vmIntrinsics::_StringBuffer_append_int:
424 case vmIntrinsics::_StringBuffer_append_String:
425 case vmIntrinsics::_StringBuffer_toString:
426 case vmIntrinsics::_Integer_toString:
427 return true;
428
429 case vmIntrinsics::_String_String:
430 {
431 Node* receiver = jvms->map()->in(jvms->argoff() + 1);
432 if (receiver->is_Proj() && receiver->in(0)->is_CallStaticJava()) {
433 CallStaticJavaNode* csj = receiver->in(0)->as_CallStaticJava();
434 ciMethod* m = csj->method();
435 if (m != nullptr &&
436 (m->intrinsic_id() == vmIntrinsics::_StringBuffer_toString ||
437 m->intrinsic_id() == vmIntrinsics::_StringBuilder_toString))
438 // Delay String.<init>(new SB())
439 return true;
440 }
441 return false;
442 }
443
444 default:
445 return false;
446 }
447 }
448 return false;
449 }
450
451 bool Compile::should_delay_boxing_inlining(ciMethod* call_method, JVMState* jvms) {
452 if (eliminate_boxing() && call_method->is_boxing_method()) {
453 set_has_boxed_value(true);
454 return aggressive_unboxing();
455 }
456 return false;
457 }
458
459 bool Compile::should_delay_vector_inlining(ciMethod* call_method, JVMState* jvms) {
460 return EnableVectorSupport && call_method->is_vector_method();
461 }
462
463 bool Compile::should_delay_vector_reboxing_inlining(ciMethod* call_method, JVMState* jvms) {
464 return EnableVectorSupport && (call_method->intrinsic_id() == vmIntrinsics::_VectorRebox);
465 }
466
467 // uncommon-trap call-sites where callee is unloaded, uninitialized or will not link
468 bool Parse::can_not_compile_call_site(ciMethod *dest_method, ciInstanceKlass* klass) {
469 // Additional inputs to consider...
470 // bc = bc()
471 // caller = method()
472 // iter().get_method_holder_index()
473 assert( dest_method->is_loaded(), "ciTypeFlow should not let us get here" );
474 // Interface classes can be loaded & linked and never get around to
475 // being initialized. Uncommon-trap for not-initialized static or
476 // v-calls. Let interface calls happen.
477 ciInstanceKlass* holder_klass = dest_method->holder();
478 if (!holder_klass->is_being_initialized() &&
479 !holder_klass->is_initialized() &&
480 !holder_klass->is_interface()) {
481 uncommon_trap(Deoptimization::Reason_uninitialized,
482 Deoptimization::Action_reinterpret,
483 holder_klass);
484 return true;
485 }
486
487 assert(dest_method->is_loaded(), "dest_method: typeflow responsibility");
488 return false;
489 }
490
491 #ifdef ASSERT
492 static bool check_call_consistency(JVMState* jvms, CallGenerator* cg) {
493 ciMethod* symbolic_info = jvms->method()->get_method_at_bci(jvms->bci());
494 ciMethod* resolved_method = cg->method();
495 if (!ciMethod::is_consistent_info(symbolic_info, resolved_method)) {
496 tty->print_cr("JVMS:");
497 jvms->dump();
498 tty->print_cr("Bytecode info:");
499 jvms->method()->get_method_at_bci(jvms->bci())->print(); tty->cr();
500 tty->print_cr("Resolved method:");
501 cg->method()->print(); tty->cr();
502 return false;
503 }
504 return true;
505 }
506 #endif // ASSERT
507
508 //------------------------------do_call----------------------------------------
509 // Handle your basic call. Inline if we can & want to, else just setup call.
510 void Parse::do_call() {
511 // It's likely we are going to add debug info soon.
512 // Also, if we inline a guy who eventually needs debug info for this JVMS,
513 // our contribution to it is cleaned up right here.
514 kill_dead_locals();
515
516 C->print_inlining_assert_ready();
517
518 // Set frequently used booleans
519 const bool is_virtual = bc() == Bytecodes::_invokevirtual;
520 const bool is_virtual_or_interface = is_virtual || bc() == Bytecodes::_invokeinterface;
521 const bool has_receiver = Bytecodes::has_receiver(bc());
522
523 // Find target being called
524 bool will_link;
525 ciSignature* declared_signature = nullptr;
526 ciMethod* orig_callee = iter().get_method(will_link, &declared_signature); // callee in the bytecode
527 ciInstanceKlass* holder_klass = orig_callee->holder();
528 ciKlass* holder = iter().get_declared_method_holder();
529 ciInstanceKlass* klass = ciEnv::get_instance_klass_for_declared_method_holder(holder);
530 assert(declared_signature != nullptr, "cannot be null");
531 JFR_ONLY(Jfr::on_resolution(this, holder, orig_callee);)
532
533 // Bump max node limit for JSR292 users
534 if (bc() == Bytecodes::_invokedynamic || orig_callee->is_method_handle_intrinsic()) {
535 C->set_max_node_limit(3*MaxNodeLimit);
536 }
537
538 // uncommon-trap when callee is unloaded, uninitialized or will not link
539 // bailout when too many arguments for register representation
540 if (!will_link || can_not_compile_call_site(orig_callee, klass)) {
541 if (PrintOpto && (Verbose || WizardMode)) {
542 method()->print_name(); tty->print_cr(" can not compile call at bci %d to:", bci());
543 orig_callee->print_name(); tty->cr();
544 }
545 return;
546 }
547 assert(holder_klass->is_loaded(), "");
548 //assert((bc_callee->is_static() || is_invokedynamic) == !has_receiver , "must match bc"); // XXX invokehandle (cur_bc_raw)
549 // Note: this takes into account invokeinterface of methods declared in java/lang/Object,
550 // which should be invokevirtuals but according to the VM spec may be invokeinterfaces
551 assert(holder_klass->is_interface() || holder_klass->super() == nullptr || (bc() != Bytecodes::_invokeinterface), "must match bc");
552 // Note: In the absence of miranda methods, an abstract class K can perform
553 // an invokevirtual directly on an interface method I.m if K implements I.
554
555 // orig_callee is the resolved callee which's signature includes the
556 // appendix argument.
557 const int nargs = orig_callee->arg_size();
558 const bool is_signature_polymorphic = MethodHandles::is_signature_polymorphic(orig_callee->intrinsic_id());
559
560 // Push appendix argument (MethodType, CallSite, etc.), if one.
561 if (iter().has_appendix()) {
562 ciObject* appendix_arg = iter().get_appendix();
563 const TypeOopPtr* appendix_arg_type = TypeOopPtr::make_from_constant(appendix_arg, /* require_const= */ true);
564 Node* appendix_arg_node = _gvn.makecon(appendix_arg_type);
565 push(appendix_arg_node);
566 }
567
568 // ---------------------
569 // Does Class Hierarchy Analysis reveal only a single target of a v-call?
570 // Then we may inline or make a static call, but become dependent on there being only 1 target.
571 // Does the call-site type profile reveal only one receiver?
572 // Then we may introduce a run-time check and inline on the path where it succeeds.
573 // The other path may uncommon_trap, check for another receiver, or do a v-call.
574
575 // Try to get the most accurate receiver type
576 ciMethod* callee = orig_callee;
577 int vtable_index = Method::invalid_vtable_index;
578 bool call_does_dispatch = false;
579
580 // Speculative type of the receiver if any
581 ciKlass* speculative_receiver_type = nullptr;
582 if (is_virtual_or_interface) {
583 Node* receiver_node = stack(sp() - nargs);
584 const TypeOopPtr* receiver_type = _gvn.type(receiver_node)->isa_oopptr();
585 // call_does_dispatch and vtable_index are out-parameters. They might be changed.
586 // For arrays, klass below is Object. When vtable calls are used,
587 // resolving the call with Object would allow an illegal call to
588 // finalize() on an array. We use holder instead: illegal calls to
589 // finalize() won't be compiled as vtable calls (IC call
590 // resolution will catch the illegal call) and the few legal calls
591 // on array types won't be either.
592 callee = C->optimize_virtual_call(method(), klass, holder, orig_callee,
593 receiver_type, is_virtual,
594 call_does_dispatch, vtable_index); // out-parameters
595 speculative_receiver_type = receiver_type != nullptr ? receiver_type->speculative_type() : nullptr;
596 }
597
598 // Additional receiver subtype checks for interface calls via invokespecial or invokeinterface.
599 ciKlass* receiver_constraint = nullptr;
600 if (iter().cur_bc_raw() == Bytecodes::_invokespecial && !orig_callee->is_object_initializer()) {
601 ciInstanceKlass* calling_klass = method()->holder();
602 ciInstanceKlass* sender_klass = calling_klass;
603 if (sender_klass->is_interface()) {
604 receiver_constraint = sender_klass;
605 }
606 } else if (iter().cur_bc_raw() == Bytecodes::_invokeinterface && orig_callee->is_private()) {
607 assert(holder->is_interface(), "How did we get a non-interface method here!");
608 receiver_constraint = holder;
609 }
610
611 if (receiver_constraint != nullptr) {
612 Node* receiver_node = stack(sp() - nargs);
613 Node* cls_node = makecon(TypeKlassPtr::make(receiver_constraint, Type::trust_interfaces));
614 Node* bad_type_ctrl = nullptr;
615 Node* casted_receiver = gen_checkcast(receiver_node, cls_node, &bad_type_ctrl);
616 if (bad_type_ctrl != nullptr) {
617 PreserveJVMState pjvms(this);
618 set_control(bad_type_ctrl);
619 uncommon_trap(Deoptimization::Reason_class_check,
620 Deoptimization::Action_none);
621 }
622 if (stopped()) {
623 return; // MUST uncommon-trap?
624 }
625 set_stack(sp() - nargs, casted_receiver);
626 }
627
628 // Note: It's OK to try to inline a virtual call.
629 // The call generator will not attempt to inline a polymorphic call
630 // unless it knows how to optimize the receiver dispatch.
631 bool try_inline = (C->do_inlining() || InlineAccessors);
632
633 // ---------------------
634 dec_sp(nargs); // Temporarily pop args for JVM state of call
635 JVMState* jvms = sync_jvms();
636
637 // ---------------------
638 // Decide call tactic.
639 // This call checks with CHA, the interpreter profile, intrinsics table, etc.
640 // It decides whether inlining is desirable or not.
641 CallGenerator* cg = C->call_generator(callee, vtable_index, call_does_dispatch, jvms, try_inline, prof_factor(), speculative_receiver_type);
642
643 // NOTE: Don't use orig_callee and callee after this point! Use cg->method() instead.
644 orig_callee = callee = nullptr;
645
646 // ---------------------
647 // Round double arguments before call
648 round_double_arguments(cg->method());
649
650 // Feed profiling data for arguments to the type system so it can
651 // propagate it as speculative types
652 record_profiled_arguments_for_speculation(cg->method(), bc());
653
654 #ifndef PRODUCT
655 // bump global counters for calls
656 count_compiled_calls(/*at_method_entry*/ false, cg->is_inline());
657
658 // Record first part of parsing work for this call
659 parse_histogram()->record_change();
660 #endif // not PRODUCT
661
662 assert(jvms == this->jvms(), "still operating on the right JVMS");
663 assert(jvms_in_sync(), "jvms must carry full info into CG");
664
665 PEAState* caller_state = nullptr;
666 if (DoPartialEscapeAnalysis) {
667 // Besides outlined methods, we scan all intrinsics because C2 skips parsing bytecodes of them.
668 // Some intrinsics have side-effect of Java heap such as Unsafe.compareAndSetReference().
669 // We treat PredicatedIntrinsicGenerator as an ordinary intrinsic as well.
670 if (!cg->is_inline() || cg->is_intrinsic()) {
671 PEAState& state = jvms->alloc_state();
672 // Materialize all inputs to non-inline and late inline calls.
673 // TODO: we can support late inline calls if we can pass the right JVM
674 // state to the late inline call.
675 //
676 // TODO: Should we query BCEA to make an enger inlining decision here?
677 // Because callee require a concrete object pointer as an argument,
678 // we have nothing to do but matertialize it.
679 //
680 // BCEscapeAnalyzer* bcea = cg->method()->get_bcea();
681 uint nargs = cg->method()->arg_size();
682 for (uint i=0; i < nargs; ++i) {
683 Node* arg = argument(i);
684
685 if (state.as_virtual(PEA(), arg)) {
686 Node* objx = state.materialize(this, arg);
687 set_argument(i, objx);
688 }
689 }
690 }
691 }
692
693 // save across call, for a subsequent cast_not_null.
694 Node* receiver = has_receiver ? argument(0) : nullptr;
695
696 // The extra CheckCastPPs for speculative types mess with PhaseStringOpts
697 if (receiver != nullptr && !call_does_dispatch && !cg->is_string_late_inline()) {
698 // Feed profiling data for a single receiver to the type system so
699 // it can propagate it as a speculative type
700 receiver = record_profiled_receiver_for_speculation(receiver);
701 }
702
703 JVMState* new_jvms = cg->generate(jvms);
704 if (new_jvms == nullptr) {
705 // When inlining attempt fails (e.g., too many arguments),
706 // it may contaminate the current compile state, making it
707 // impossible to pull back and try again. Once we call
708 // cg->generate(), we are committed. If it fails, the whole
709 // compilation task is compromised.
710 if (failing()) return;
711
712 // This can happen if a library intrinsic is available, but refuses
713 // the call site, perhaps because it did not match a pattern the
714 // intrinsic was expecting to optimize. Should always be possible to
715 // get a normal java call that may inline in that case
716 cg = C->call_generator(cg->method(), vtable_index, call_does_dispatch, jvms, try_inline, prof_factor(), speculative_receiver_type, /* allow_intrinsics= */ false);
717 new_jvms = cg->generate(jvms);
718 if (new_jvms == nullptr) {
719 guarantee(failing(), "call failed to generate: calls should work");
720 return;
721 }
722 }
723
724 if (cg->is_inline()) {
725 // Accumulate has_loops estimate
726 C->env()->notice_inlined_method(cg->method());
727 }
728
729 // Reset parser state from [new_]jvms, which now carries results of the call.
730 // Return value (if any) is already pushed on the stack by the cg.
731 add_exception_states_from(new_jvms);
732 if (new_jvms->map()->control() == top()) {
733 stop_and_kill_map();
734 } else {
735 assert(new_jvms->same_calls_as(jvms), "method/bci left unchanged");
736 set_jvms(new_jvms);
737 }
738
739 assert(check_call_consistency(jvms, cg), "inconsistent info");
740
741 if (!stopped()) {
742 // This was some sort of virtual call, which did a null check for us.
743 // Now we can assert receiver-not-null, on the normal return path.
744 if (receiver != nullptr && cg->is_virtual()) {
745 Node* cast = cast_not_null(receiver);
746 // %%% assert(receiver == cast, "should already have cast the receiver");
747 }
748
749 ciType* rtype = cg->method()->return_type();
750 ciType* ctype = declared_signature->return_type();
751
752 if (Bytecodes::has_optional_appendix(iter().cur_bc_raw()) || is_signature_polymorphic) {
753 // Be careful here with return types.
754 if (ctype != rtype) {
755 BasicType rt = rtype->basic_type();
756 BasicType ct = ctype->basic_type();
757 if (ct == T_VOID) {
758 // It's OK for a method to return a value that is discarded.
759 // The discarding does not require any special action from the caller.
760 // The Java code knows this, at VerifyType.isNullConversion.
761 pop_node(rt); // whatever it was, pop it
762 } else if (rt == T_INT || is_subword_type(rt)) {
763 // Nothing. These cases are handled in lambda form bytecode.
764 assert(ct == T_INT || is_subword_type(ct), "must match: rt=%s, ct=%s", type2name(rt), type2name(ct));
765 } else if (is_reference_type(rt)) {
766 assert(is_reference_type(ct), "rt=%s, ct=%s", type2name(rt), type2name(ct));
767 if (ctype->is_loaded()) {
768 const TypeOopPtr* arg_type = TypeOopPtr::make_from_klass(rtype->as_klass());
769 const Type* sig_type = TypeOopPtr::make_from_klass(ctype->as_klass());
770 if (arg_type != nullptr && !arg_type->higher_equal(sig_type)) {
771 Node* retnode = pop();
772 Node* cast_obj = _gvn.transform(new CheckCastPPNode(control(), retnode, sig_type));
773 push(cast_obj);
774 }
775 }
776 } else {
777 assert(rt == ct, "unexpected mismatch: rt=%s, ct=%s", type2name(rt), type2name(ct));
778 // push a zero; it's better than getting an oop/int mismatch
779 pop_node(rt);
780 Node* retnode = zerocon(ct);
781 push_node(ct, retnode);
782 }
783 // Now that the value is well-behaved, continue with the call-site type.
784 rtype = ctype;
785 }
786 } else {
787 // Symbolic resolution enforces the types to be the same.
788 // NOTE: We must relax the assert for unloaded types because two
789 // different ciType instances of the same unloaded class type
790 // can appear to be "loaded" by different loaders (depending on
791 // the accessing class).
792 assert(!rtype->is_loaded() || !ctype->is_loaded() || rtype == ctype,
793 "mismatched return types: rtype=%s, ctype=%s", rtype->name(), ctype->name());
794 }
795
796 // If the return type of the method is not loaded, assert that the
797 // value we got is a null. Otherwise, we need to recompile.
798 if (!rtype->is_loaded()) {
799 if (PrintOpto && (Verbose || WizardMode)) {
800 method()->print_name(); tty->print_cr(" asserting nullness of result at bci: %d", bci());
801 cg->method()->print_name(); tty->cr();
802 }
803 if (C->log() != nullptr) {
804 C->log()->elem("assert_null reason='return' klass='%d'",
805 C->log()->identify(rtype));
806 }
807 // If there is going to be a trap, put it at the next bytecode:
808 set_bci(iter().next_bci());
809 null_assert(peek());
810 set_bci(iter().cur_bci()); // put it back
811 }
812 BasicType ct = ctype->basic_type();
813 if (is_reference_type(ct)) {
814 record_profiled_return_for_speculation();
815 }
816 }
817
818 // Restart record of parsing work after possible inlining of call
819 #ifndef PRODUCT
820 parse_histogram()->set_initial_state(bc());
821 #endif
822 }
823
824 //---------------------------catch_call_exceptions-----------------------------
825 // Put a Catch and CatchProj nodes behind a just-created call.
826 // Send their caught exceptions to the proper handler.
827 // This may be used after a call to the rethrow VM stub,
828 // when it is needed to process unloaded exception classes.
829 void Parse::catch_call_exceptions(ciExceptionHandlerStream& handlers) {
830 // Exceptions are delivered through this channel:
831 Node* i_o = this->i_o();
832
833 // Add a CatchNode.
834 Arena tmp_mem{mtCompiler};
835 GrowableArray<int> bcis(&tmp_mem, 8, 0, -1);
836 GrowableArray<const Type*> extypes(&tmp_mem, 8, 0, nullptr);
837 GrowableArray<int> saw_unloaded(&tmp_mem, 8, 0, -1);
838
839 bool default_handler = false;
840 for (; !handlers.is_done(); handlers.next()) {
841 ciExceptionHandler* h = handlers.handler();
842 int h_bci = h->handler_bci();
843 ciInstanceKlass* h_klass = h->is_catch_all() ? env()->Throwable_klass() : h->catch_klass();
844 // Do not introduce unloaded exception types into the graph:
845 if (!h_klass->is_loaded()) {
846 if (saw_unloaded.contains(h_bci)) {
847 /* We've already seen an unloaded exception with h_bci,
848 so don't duplicate. Duplication will cause the CatchNode to be
849 unnecessarily large. See 4713716. */
850 continue;
851 } else {
852 saw_unloaded.append(h_bci);
853 }
854 }
855 const Type* h_extype = TypeOopPtr::make_from_klass(h_klass);
856 // (We use make_from_klass because it respects UseUniqueSubclasses.)
857 h_extype = h_extype->join(TypeInstPtr::NOTNULL);
858 assert(!h_extype->empty(), "sanity");
859 // Note: It's OK if the BCIs repeat themselves.
860 bcis.append(h_bci);
861 extypes.append(h_extype);
862 if (h_bci == -1) {
863 default_handler = true;
864 }
865 }
866
867 if (!default_handler) {
868 bcis.append(-1);
869 const Type* extype = TypeOopPtr::make_from_klass(env()->Throwable_klass())->is_instptr();
870 extype = extype->join(TypeInstPtr::NOTNULL);
871 extypes.append(extype);
872 }
873
874 int len = bcis.length();
875 CatchNode *cn = new CatchNode(control(), i_o, len+1);
876 Node *catch_ = _gvn.transform(cn);
877
878 // now branch with the exception state to each of the (potential)
879 // handlers
880 for(int i=0; i < len; i++) {
881 // Setup JVM state to enter the handler.
882 PreserveJVMState pjvms(this);
883 // Locals are just copied from before the call.
884 // Get control from the CatchNode.
885 int handler_bci = bcis.at(i);
886 Node* ctrl = _gvn.transform( new CatchProjNode(catch_, i+1,handler_bci));
887 // This handler cannot happen?
888 if (ctrl == top()) continue;
889 set_control(ctrl);
890
891 // Create exception oop
892 const TypeInstPtr* extype = extypes.at(i)->is_instptr();
893 Node* ex_oop = _gvn.transform(new CreateExNode(extypes.at(i), ctrl, i_o));
894
895 // Handle unloaded exception classes.
896 if (saw_unloaded.contains(handler_bci)) {
897 // An unloaded exception type is coming here. Do an uncommon trap.
898 #ifndef PRODUCT
899 // We do not expect the same handler bci to take both cold unloaded
900 // and hot loaded exceptions. But, watch for it.
901 if (PrintOpto && (Verbose || WizardMode) && extype->is_loaded()) {
902 tty->print("Warning: Handler @%d takes mixed loaded/unloaded exceptions in ", bci());
903 method()->print_name(); tty->cr();
904 } else if (PrintOpto && (Verbose || WizardMode)) {
905 tty->print("Bailing out on unloaded exception type ");
906 extype->instance_klass()->print_name();
907 tty->print(" at bci:%d in ", bci());
908 method()->print_name(); tty->cr();
909 }
910 #endif
911 // Emit an uncommon trap instead of processing the block.
912 set_bci(handler_bci);
913 push_ex_oop(ex_oop);
914 uncommon_trap(Deoptimization::Reason_unloaded,
915 Deoptimization::Action_reinterpret,
916 extype->instance_klass(), "!loaded exception");
917 set_bci(iter().cur_bci()); // put it back
918 continue;
919 }
920
921 // go to the exception handler
922 if (handler_bci < 0) { // merge with corresponding rethrow node
923 throw_to_exit(make_exception_state(ex_oop));
924 } else { // Else jump to corresponding handle
925 push_ex_oop(ex_oop); // Clear stack and push just the oop.
926 merge_exception(handler_bci);
927 }
928 }
929
930 // The first CatchProj is for the normal return.
931 // (Note: If this is a call to rethrow_Java, this node goes dead.)
932 set_control(_gvn.transform( new CatchProjNode(catch_, CatchProjNode::fall_through_index, CatchProjNode::no_handler_bci)));
933 }
934
935
936 //----------------------------catch_inline_exceptions--------------------------
937 // Handle all exceptions thrown by an inlined method or individual bytecode.
938 // Common case 1: we have no handler, so all exceptions merge right into
939 // the rethrow case.
940 // Case 2: we have some handlers, with loaded exception klasses that have
941 // no subklasses. We do a Deutsch-Schiffman style type-check on the incoming
942 // exception oop and branch to the handler directly.
943 // Case 3: We have some handlers with subklasses or are not loaded at
944 // compile-time. We have to call the runtime to resolve the exception.
945 // So we insert a RethrowCall and all the logic that goes with it.
946 void Parse::catch_inline_exceptions(SafePointNode* ex_map) {
947 // Caller is responsible for saving away the map for normal control flow!
948 assert(stopped(), "call set_map(nullptr) first");
949 assert(method()->has_exception_handlers(), "don't come here w/o work to do");
950
951 Node* ex_node = saved_ex_oop(ex_map);
952 if (ex_node == top()) {
953 // No action needed.
954 return;
955 }
956 const TypeInstPtr* ex_type = _gvn.type(ex_node)->isa_instptr();
957 NOT_PRODUCT(if (ex_type==nullptr) tty->print_cr("*** Exception not InstPtr"));
958 if (ex_type == nullptr)
959 ex_type = TypeOopPtr::make_from_klass(env()->Throwable_klass())->is_instptr();
960
961 // determine potential exception handlers
962 ciExceptionHandlerStream handlers(method(), bci(),
963 ex_type->instance_klass(),
964 ex_type->klass_is_exact());
965
966 // Start executing from the given throw state. (Keep its stack, for now.)
967 // Get the exception oop as known at compile time.
968 ex_node = use_exception_state(ex_map);
969
970 // Get the exception oop klass from its header
971 Node* ex_klass_node = nullptr;
972 if (has_exception_handler() && !ex_type->klass_is_exact()) {
973 Node* p = basic_plus_adr( ex_node, ex_node, oopDesc::klass_offset_in_bytes());
974 ex_klass_node = _gvn.transform(LoadKlassNode::make(_gvn, nullptr, immutable_memory(), p, TypeInstPtr::KLASS, TypeInstKlassPtr::OBJECT));
975
976 // Compute the exception klass a little more cleverly.
977 // Obvious solution is to simple do a LoadKlass from the 'ex_node'.
978 // However, if the ex_node is a PhiNode, I'm going to do a LoadKlass for
979 // each arm of the Phi. If I know something clever about the exceptions
980 // I'm loading the class from, I can replace the LoadKlass with the
981 // klass constant for the exception oop.
982 if (ex_node->is_Phi()) {
983 ex_klass_node = new PhiNode(ex_node->in(0), TypeInstKlassPtr::OBJECT);
984 for (uint i = 1; i < ex_node->req(); i++) {
985 Node* ex_in = ex_node->in(i);
986 if (ex_in == top() || ex_in == nullptr) {
987 // This path was not taken.
988 ex_klass_node->init_req(i, top());
989 continue;
990 }
991 Node* p = basic_plus_adr(ex_in, ex_in, oopDesc::klass_offset_in_bytes());
992 Node* k = _gvn.transform( LoadKlassNode::make(_gvn, nullptr, immutable_memory(), p, TypeInstPtr::KLASS, TypeInstKlassPtr::OBJECT));
993 ex_klass_node->init_req( i, k );
994 }
995 ex_klass_node = _gvn.transform(ex_klass_node);
996 }
997 }
998
999 // Scan the exception table for applicable handlers.
1000 // If none, we can call rethrow() and be done!
1001 // If precise (loaded with no subklasses), insert a D.S. style
1002 // pointer compare to the correct handler and loop back.
1003 // If imprecise, switch to the Rethrow VM-call style handling.
1004
1005 int remaining = handlers.count_remaining();
1006
1007 // iterate through all entries sequentially
1008 for (;!handlers.is_done(); handlers.next()) {
1009 ciExceptionHandler* handler = handlers.handler();
1010
1011 if (handler->is_rethrow()) {
1012 // If we fell off the end of the table without finding an imprecise
1013 // exception klass (and without finding a generic handler) then we
1014 // know this exception is not handled in this method. We just rethrow
1015 // the exception into the caller.
1016 throw_to_exit(make_exception_state(ex_node));
1017 return;
1018 }
1019
1020 // exception handler bci range covers throw_bci => investigate further
1021 int handler_bci = handler->handler_bci();
1022
1023 if (remaining == 1) {
1024 push_ex_oop(ex_node); // Push exception oop for handler
1025 if (PrintOpto && WizardMode) {
1026 tty->print_cr(" Catching every inline exception bci:%d -> handler_bci:%d", bci(), handler_bci);
1027 }
1028 // If this is a backwards branch in the bytecodes, add safepoint
1029 maybe_add_safepoint(handler_bci);
1030 merge_exception(handler_bci); // jump to handler
1031 return; // No more handling to be done here!
1032 }
1033
1034 // Get the handler's klass
1035 ciInstanceKlass* klass = handler->catch_klass();
1036
1037 if (!klass->is_loaded()) { // klass is not loaded?
1038 // fall through into catch_call_exceptions which will emit a
1039 // handler with an uncommon trap.
1040 break;
1041 }
1042
1043 if (klass->is_interface()) // should not happen, but...
1044 break; // bail out
1045
1046 // Check the type of the exception against the catch type
1047 const TypeKlassPtr *tk = TypeKlassPtr::make(klass);
1048 Node* con = _gvn.makecon(tk);
1049 Node* not_subtype_ctrl = gen_subtype_check(ex_klass_node, con);
1050 if (!stopped()) {
1051 PreserveJVMState pjvms(this);
1052 const TypeInstPtr* tinst = TypeOopPtr::make_from_klass_unique(klass)->cast_to_ptr_type(TypePtr::NotNull)->is_instptr();
1053 assert(klass->has_subklass() || tinst->klass_is_exact(), "lost exactness");
1054 Node* ex_oop = _gvn.transform(new CheckCastPPNode(control(), ex_node, tinst));
1055 push_ex_oop(ex_oop); // Push exception oop for handler
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 maybe_add_safepoint(handler_bci);
1063 merge_exception(handler_bci);
1064 }
1065 set_control(not_subtype_ctrl);
1066
1067 // Come here if exception does not match handler.
1068 // Carry on with more handler checks.
1069 --remaining;
1070 }
1071
1072 assert(!stopped(), "you should return if you finish the chain");
1073
1074 // Oops, need to call into the VM to resolve the klasses at runtime.
1075 // Note: This call must not deoptimize, since it is not a real at this bci!
1076 kill_dead_locals();
1077
1078 make_runtime_call(RC_NO_LEAF | RC_MUST_THROW,
1079 OptoRuntime::rethrow_Type(),
1080 OptoRuntime::rethrow_stub(),
1081 nullptr, nullptr,
1082 ex_node);
1083
1084 // Rethrow is a pure call, no side effects, only a result.
1085 // The result cannot be allocated, so we use I_O
1086
1087 // Catch exceptions from the rethrow
1088 catch_call_exceptions(handlers);
1089 }
1090
1091
1092 // (Note: Moved add_debug_info into GraphKit::add_safepoint_edges.)
1093
1094
1095 #ifndef PRODUCT
1096 void Parse::count_compiled_calls(bool at_method_entry, bool is_inline) {
1097 if( CountCompiledCalls ) {
1098 if( at_method_entry ) {
1099 // bump invocation counter if top method (for statistics)
1100 if (CountCompiledCalls && depth() == 1) {
1101 const TypePtr* addr_type = TypeMetadataPtr::make(method());
1102 Node* adr1 = makecon(addr_type);
1103 Node* adr2 = basic_plus_adr(adr1, adr1, in_bytes(Method::compiled_invocation_counter_offset()));
1104 increment_counter(adr2);
1105 }
1106 } else if (is_inline) {
1107 switch (bc()) {
1108 case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_inlined_calls_addr()); break;
1109 case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_inlined_interface_calls_addr()); break;
1110 case Bytecodes::_invokestatic:
1111 case Bytecodes::_invokedynamic:
1112 case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_inlined_static_calls_addr()); break;
1113 default: fatal("unexpected call bytecode");
1114 }
1115 } else {
1116 switch (bc()) {
1117 case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_normal_calls_addr()); break;
1118 case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_interface_calls_addr()); break;
1119 case Bytecodes::_invokestatic:
1120 case Bytecodes::_invokedynamic:
1121 case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_static_calls_addr()); break;
1122 default: fatal("unexpected call bytecode");
1123 }
1124 }
1125 }
1126 }
1127 #endif //PRODUCT
1128
1129
1130 ciMethod* Compile::optimize_virtual_call(ciMethod* caller, ciInstanceKlass* klass,
1131 ciKlass* holder, ciMethod* callee,
1132 const TypeOopPtr* receiver_type, bool is_virtual,
1133 bool& call_does_dispatch, int& vtable_index,
1134 bool check_access) {
1135 // Set default values for out-parameters.
1136 call_does_dispatch = true;
1137 vtable_index = Method::invalid_vtable_index;
1138
1139 // Choose call strategy.
1140 ciMethod* optimized_virtual_method = optimize_inlining(caller, klass, holder, callee,
1141 receiver_type, check_access);
1142
1143 // Have the call been sufficiently improved such that it is no longer a virtual?
1144 if (optimized_virtual_method != nullptr) {
1145 callee = optimized_virtual_method;
1146 call_does_dispatch = false;
1147 } else if (!UseInlineCaches && is_virtual && callee->is_loaded()) {
1148 // We can make a vtable call at this site
1149 vtable_index = callee->resolve_vtable_index(caller->holder(), holder);
1150 }
1151 return callee;
1152 }
1153
1154 // Identify possible target method and inlining style
1155 ciMethod* Compile::optimize_inlining(ciMethod* caller, ciInstanceKlass* klass, ciKlass* holder,
1156 ciMethod* callee, const TypeOopPtr* receiver_type,
1157 bool check_access) {
1158 // only use for virtual or interface calls
1159
1160 // If it is obviously final, do not bother to call find_monomorphic_target,
1161 // because the class hierarchy checks are not needed, and may fail due to
1162 // incompletely loaded classes. Since we do our own class loading checks
1163 // in this module, we may confidently bind to any method.
1164 if (callee->can_be_statically_bound()) {
1165 return callee;
1166 }
1167
1168 if (receiver_type == nullptr) {
1169 return nullptr; // no receiver type info
1170 }
1171
1172 // Attempt to improve the receiver
1173 bool actual_receiver_is_exact = false;
1174 ciInstanceKlass* actual_receiver = klass;
1175 // Array methods are all inherited from Object, and are monomorphic.
1176 // finalize() call on array is not allowed.
1177 if (receiver_type->isa_aryptr() &&
1178 callee->holder() == env()->Object_klass() &&
1179 callee->name() != ciSymbols::finalize_method_name()) {
1180 return callee;
1181 }
1182
1183 // All other interesting cases are instance klasses.
1184 if (!receiver_type->isa_instptr()) {
1185 return nullptr;
1186 }
1187
1188 ciInstanceKlass* receiver_klass = receiver_type->is_instptr()->instance_klass();
1189 if (receiver_klass->is_loaded() && receiver_klass->is_initialized() && !receiver_klass->is_interface() &&
1190 (receiver_klass == actual_receiver || receiver_klass->is_subtype_of(actual_receiver))) {
1191 // ikl is a same or better type than the original actual_receiver,
1192 // e.g. static receiver from bytecodes.
1193 actual_receiver = receiver_klass;
1194 // Is the actual_receiver exact?
1195 actual_receiver_is_exact = receiver_type->klass_is_exact();
1196 }
1197
1198 ciInstanceKlass* calling_klass = caller->holder();
1199 ciMethod* cha_monomorphic_target = callee->find_monomorphic_target(calling_klass, klass, actual_receiver, check_access);
1200
1201 if (cha_monomorphic_target != nullptr) {
1202 // Hardwiring a virtual.
1203 assert(!callee->can_be_statically_bound(), "should have been handled earlier");
1204 assert(!cha_monomorphic_target->is_abstract(), "");
1205 if (!cha_monomorphic_target->can_be_statically_bound(actual_receiver)) {
1206 // If we inlined because CHA revealed only a single target method,
1207 // then we are dependent on that target method not getting overridden
1208 // by dynamic class loading. Be sure to test the "static" receiver
1209 // dest_method here, as opposed to the actual receiver, which may
1210 // falsely lead us to believe that the receiver is final or private.
1211 dependencies()->assert_unique_concrete_method(actual_receiver, cha_monomorphic_target, holder, callee);
1212 }
1213 return cha_monomorphic_target;
1214 }
1215
1216 // If the type is exact, we can still bind the method w/o a vcall.
1217 // (This case comes after CHA so we can see how much extra work it does.)
1218 if (actual_receiver_is_exact) {
1219 // In case of evolution, there is a dependence on every inlined method, since each
1220 // such method can be changed when its class is redefined.
1221 ciMethod* exact_method = callee->resolve_invoke(calling_klass, actual_receiver);
1222 if (exact_method != nullptr) {
1223 return exact_method;
1224 }
1225 }
1226
1227 return nullptr;
1228 }