1 /*
2 * Copyright (c) 1998, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "ci/ciCallSite.hpp"
26 #include "ci/ciMethodHandle.hpp"
27 #include "ci/ciSymbols.hpp"
28 #include "classfile/vmIntrinsics.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "compiler/compileBroker.hpp"
31 #include "compiler/compileLog.hpp"
32 #include "interpreter/linkResolver.hpp"
33 #include "jvm_io.h"
34 #include "logging/log.hpp"
35 #include "logging/logLevel.hpp"
36 #include "logging/logMessage.hpp"
37 #include "logging/logStream.hpp"
38 #include "opto/addnode.hpp"
39 #include "opto/callGenerator.hpp"
40 #include "opto/castnode.hpp"
41 #include "opto/cfgnode.hpp"
42 #include "opto/inlinetypenode.hpp"
43 #include "opto/mulnode.hpp"
44 #include "opto/parse.hpp"
45 #include "opto/rootnode.hpp"
46 #include "opto/runtime.hpp"
47 #include "opto/subnode.hpp"
48 #include "prims/methodHandles.hpp"
49 #include "runtime/sharedRuntime.hpp"
50 #include "utilities/macros.hpp"
51 #if INCLUDE_JFR
52 #include "jfr/jfr.hpp"
53 #endif
54
55 static void print_trace_type_profile(outputStream* out, int depth, ciKlass* prof_klass, int site_count, int receiver_count,
56 bool with_deco) {
57 if (with_deco) {
58 CompileTask::print_inline_indent(depth, out);
59 }
60 out->print(" \\-> TypeProfile (%d/%d counts) = ", receiver_count, site_count);
61 prof_klass->name()->print_symbol_on(out);
62 if (with_deco) {
63 out->cr();
64 }
65 }
66
67 static void trace_type_profile(Compile* C, ciMethod* method, JVMState* jvms,
68 ciMethod* prof_method, ciKlass* prof_klass, int site_count, int receiver_count) {
69 int depth = jvms->depth() - 1;
70 int bci = jvms->bci();
71 if (TraceTypeProfile || C->print_inlining()) {
72 if (!C->print_inlining()) {
73 if (!PrintOpto && !PrintCompilation) {
74 method->print_short_name();
75 tty->cr();
76 }
77 CompileTask::print_inlining_tty(prof_method, depth, bci, InliningResult::SUCCESS);
78 print_trace_type_profile(tty, depth, prof_klass, site_count, receiver_count, true);
79 } else {
80 auto stream = C->inline_printer()->record(method, jvms, InliningResult::SUCCESS);
81 print_trace_type_profile(stream, depth, prof_klass, site_count, receiver_count, false);
82 }
83 }
84
85 LogTarget(Debug, jit, inlining) lt;
86 if (lt.is_enabled()) {
87 LogStream ls(lt);
88 print_trace_type_profile(&ls, depth, prof_klass, site_count, receiver_count, true);
89 }
90 }
91
92 static bool arg_can_be_larval(ciMethod* callee, int arg_idx) {
93 if (callee->is_object_constructor() && arg_idx == 0) {
94 return true;
95 }
96
97 if (arg_idx != 1 || callee->intrinsic_id() == vmIntrinsicID::_none) {
98 return false;
99 }
100
101 switch (callee->intrinsic_id()) {
102 case vmIntrinsicID::_finishPrivateBuffer:
103 case vmIntrinsicID::_putBoolean:
104 case vmIntrinsicID::_putBooleanOpaque:
105 case vmIntrinsicID::_putBooleanRelease:
106 case vmIntrinsicID::_putBooleanVolatile:
107 case vmIntrinsicID::_putByte:
108 case vmIntrinsicID::_putByteOpaque:
109 case vmIntrinsicID::_putByteRelease:
110 case vmIntrinsicID::_putByteVolatile:
111 case vmIntrinsicID::_putChar:
112 case vmIntrinsicID::_putCharOpaque:
113 case vmIntrinsicID::_putCharRelease:
114 case vmIntrinsicID::_putCharUnaligned:
115 case vmIntrinsicID::_putCharVolatile:
116 case vmIntrinsicID::_putShort:
117 case vmIntrinsicID::_putShortOpaque:
118 case vmIntrinsicID::_putShortRelease:
119 case vmIntrinsicID::_putShortUnaligned:
120 case vmIntrinsicID::_putShortVolatile:
121 case vmIntrinsicID::_putInt:
122 case vmIntrinsicID::_putIntOpaque:
123 case vmIntrinsicID::_putIntRelease:
124 case vmIntrinsicID::_putIntUnaligned:
125 case vmIntrinsicID::_putIntVolatile:
126 case vmIntrinsicID::_putLong:
127 case vmIntrinsicID::_putLongOpaque:
128 case vmIntrinsicID::_putLongRelease:
129 case vmIntrinsicID::_putLongUnaligned:
130 case vmIntrinsicID::_putLongVolatile:
131 case vmIntrinsicID::_putFloat:
132 case vmIntrinsicID::_putFloatOpaque:
133 case vmIntrinsicID::_putFloatRelease:
134 case vmIntrinsicID::_putFloatVolatile:
135 case vmIntrinsicID::_putDouble:
136 case vmIntrinsicID::_putDoubleOpaque:
137 case vmIntrinsicID::_putDoubleRelease:
138 case vmIntrinsicID::_putDoubleVolatile:
139 case vmIntrinsicID::_putReference:
140 case vmIntrinsicID::_putReferenceOpaque:
141 case vmIntrinsicID::_putReferenceRelease:
142 case vmIntrinsicID::_putReferenceVolatile:
143 case vmIntrinsicID::_putValue:
144 return true;
145 default:
146 return false;
147 }
148 }
149
150 CallGenerator* Compile::call_generator(ciMethod* callee, int vtable_index, bool call_does_dispatch,
151 JVMState* jvms, bool allow_inline,
152 float prof_factor, ciKlass* speculative_receiver_type,
153 bool allow_intrinsics) {
154 assert(callee != nullptr, "failed method resolution");
155
156 ciMethod* caller = jvms->method();
157 int bci = jvms->bci();
158 Bytecodes::Code bytecode = caller->java_code_at_bci(bci);
159 ciMethod* orig_callee = caller->get_method_at_bci(bci);
160
161 const bool is_virtual_or_interface = (bytecode == Bytecodes::_invokevirtual) ||
162 (bytecode == Bytecodes::_invokeinterface) ||
163 (orig_callee->intrinsic_id() == vmIntrinsics::_linkToVirtual) ||
164 (orig_callee->intrinsic_id() == vmIntrinsics::_linkToInterface);
165
166 const bool check_access = !orig_callee->is_method_handle_intrinsic(); // method handle intrinsics don't perform access checks
167
168 // Dtrace currently doesn't work unless all calls are vanilla
169 if (env()->dtrace_method_probes()) {
170 allow_inline = false;
171 }
172
173 // Note: When we get profiling during stage-1 compiles, we want to pull
174 // from more specific profile data which pertains to this inlining.
175 // Right now, ignore the information in jvms->caller(), and do method[bci].
176 ciCallProfile profile = caller->call_profile_at_bci(bci);
177
178 // See how many times this site has been invoked.
179 int site_count = profile.count();
180 int receiver_count = -1;
181 if (call_does_dispatch && UseTypeProfile && profile.has_receiver(0)) {
182 // Receivers in the profile structure are ordered by call counts
183 // so that the most called (major) receiver is profile.receiver(0).
184 receiver_count = profile.receiver_count(0);
185 }
186
187 CompileLog* log = this->log();
188 if (log != nullptr) {
189 int rid = (receiver_count >= 0)? log->identify(profile.receiver(0)): -1;
190 int r2id = (rid != -1 && profile.has_receiver(1))? log->identify(profile.receiver(1)):-1;
191 log->begin_elem("call method='%d' count='%d' prof_factor='%f'",
192 log->identify(callee), site_count, prof_factor);
193 if (call_does_dispatch) log->print(" virtual='1'");
194 if (allow_inline) log->print(" inline='1'");
195 if (receiver_count >= 0) {
196 log->print(" receiver='%d' receiver_count='%d'", rid, receiver_count);
197 if (profile.has_receiver(1)) {
198 log->print(" receiver2='%d' receiver2_count='%d'", r2id, profile.receiver_count(1));
199 }
200 }
201 if (callee->is_method_handle_intrinsic()) {
202 log->print(" method_handle_intrinsic='1'");
203 }
204 log->end_elem();
205 }
206
207 // Special case the handling of certain common, profitable library
208 // methods. If these methods are replaced with specialized code,
209 // then we return it as the inlined version of the call.
210 CallGenerator* cg_intrinsic = nullptr;
211 if (callee->intrinsic_id() == vmIntrinsics::_makePrivateBuffer || callee->intrinsic_id() == vmIntrinsics::_finishPrivateBuffer) {
212 // These methods must be inlined so that we don't have larval value objects crossing method
213 // boundaries
214 assert(!call_does_dispatch, "callee should not be virtual %s", callee->name()->as_utf8());
215 CallGenerator* cg = find_intrinsic(callee, call_does_dispatch);
216
217 if (cg == nullptr) {
218 // This is probably because the intrinsics is disabled from the command line
219 char reason[256];
220 jio_snprintf(reason, sizeof(reason), "cannot find an intrinsics for %s", callee->name()->as_utf8());
221 C->record_method_not_compilable(reason);
222 return nullptr;
223 }
224 return cg;
225 } else if (allow_inline && allow_intrinsics) {
226 CallGenerator* cg = find_intrinsic(callee, call_does_dispatch);
227 if (cg != nullptr) {
228 if (cg->is_predicated()) {
229 // Code without intrinsic but, hopefully, inlined.
230 CallGenerator* inline_cg = this->call_generator(callee,
231 vtable_index, call_does_dispatch, jvms, allow_inline, prof_factor, speculative_receiver_type, false);
232 if (inline_cg != nullptr) {
233 cg = CallGenerator::for_predicated_intrinsic(cg, inline_cg);
234 }
235 }
236
237 // If intrinsic does the virtual dispatch, we try to use the type profile
238 // first, and hopefully inline it as the regular virtual call below.
239 // We will retry the intrinsic if nothing had claimed it afterwards.
240 if (cg->does_virtual_dispatch()) {
241 cg_intrinsic = cg;
242 cg = nullptr;
243 } else if (IncrementalInline && should_delay_vector_inlining(callee, jvms)) {
244 return CallGenerator::for_late_inline(callee, cg);
245 } else {
246 return cg;
247 }
248 }
249 }
250
251 // Do method handle calls.
252 // NOTE: This must happen before normal inlining logic below since
253 // MethodHandle.invoke* are native methods which obviously don't
254 // have bytecodes and so normal inlining fails.
255 if (callee->is_method_handle_intrinsic()) {
256 CallGenerator* cg = CallGenerator::for_method_handle_call(jvms, caller, callee, allow_inline);
257 return cg;
258 }
259
260 // Attempt to inline...
261 if (allow_inline) {
262 // The profile data is only partly attributable to this caller,
263 // scale back the call site information.
264 float past_uses = jvms->method()->scale_count(site_count, prof_factor);
265 // This is the number of times we expect the call code to be used.
266 float expected_uses = past_uses;
267
268 // Try inlining a bytecoded method:
269 if (!call_does_dispatch) {
270 InlineTree* ilt = InlineTree::find_subtree_from_root(this->ilt(), jvms->caller(), jvms->method());
271 bool should_delay = C->should_delay_inlining();
272 if (ilt->ok_to_inline(callee, jvms, profile, should_delay)) {
273 CallGenerator* cg = CallGenerator::for_inline(callee, expected_uses);
274 // For optimized virtual calls assert at runtime that receiver object
275 // is a subtype of the inlined method holder. CHA can report a method
276 // as a unique target under an abstract method, but receiver type
277 // sometimes has a broader type. Similar scenario is possible with
278 // default methods when type system loses information about implemented
279 // interfaces.
280 if (cg != nullptr && is_virtual_or_interface && !callee->is_static()) {
281 CallGenerator* trap_cg = CallGenerator::for_uncommon_trap(callee,
282 Deoptimization::Reason_receiver_constraint, Deoptimization::Action_none);
283
284 cg = CallGenerator::for_guarded_call(callee->holder(), trap_cg, cg);
285 }
286 if (cg != nullptr) {
287 // Delay the inlining of this method to give us the
288 // opportunity to perform some high level optimizations
289 // first.
290 if (should_delay) {
291 return CallGenerator::for_late_inline(callee, cg);
292 } else if (should_delay_string_inlining(callee, jvms)) {
293 return CallGenerator::for_string_late_inline(callee, cg);
294 } else if (should_delay_boxing_inlining(callee, jvms)) {
295 return CallGenerator::for_boxing_late_inline(callee, cg);
296 } else if (should_delay_vector_reboxing_inlining(callee, jvms)) {
297 return CallGenerator::for_vector_reboxing_late_inline(callee, cg);
298 } else {
299 return cg;
300 }
301 }
302 }
303 }
304
305 // Try using the type profile.
306 if (call_does_dispatch && site_count > 0 && UseTypeProfile) {
307 // The major receiver's count >= TypeProfileMajorReceiverPercent of site_count.
308 bool have_major_receiver = profile.has_receiver(0) && (100.*profile.receiver_prob(0) >= (float)TypeProfileMajorReceiverPercent);
309 ciMethod* receiver_method = nullptr;
310
311 int morphism = profile.morphism();
312 if (speculative_receiver_type != nullptr) {
313 if (!too_many_traps_or_recompiles(caller, bci, Deoptimization::Reason_speculate_class_check)) {
314 // We have a speculative type, we should be able to resolve
315 // the call. We do that before looking at the profiling at
316 // this invoke because it may lead to bimorphic inlining which
317 // a speculative type should help us avoid.
318 receiver_method = callee->resolve_invoke(jvms->method()->holder(),
319 speculative_receiver_type,
320 check_access);
321 if (receiver_method == nullptr) {
322 speculative_receiver_type = nullptr;
323 } else {
324 morphism = 1;
325 }
326 } else {
327 // speculation failed before. Use profiling at the call
328 // (could allow bimorphic inlining for instance).
329 speculative_receiver_type = nullptr;
330 }
331 }
332 if (receiver_method == nullptr &&
333 (have_major_receiver || morphism == 1 ||
334 (morphism == 2 && UseBimorphicInlining))) {
335 // receiver_method = profile.method();
336 // Profiles do not suggest methods now. Look it up in the major receiver.
337 assert(check_access, "required");
338 receiver_method = callee->resolve_invoke(jvms->method()->holder(),
339 profile.receiver(0));
340 }
341 if (receiver_method != nullptr) {
342 // The single majority receiver sufficiently outweighs the minority.
343 CallGenerator* hit_cg = this->call_generator(receiver_method,
344 vtable_index, !call_does_dispatch, jvms, allow_inline, prof_factor);
345 if (hit_cg != nullptr) {
346 // Look up second receiver.
347 CallGenerator* next_hit_cg = nullptr;
348 ciMethod* next_receiver_method = nullptr;
349 if (morphism == 2 && UseBimorphicInlining) {
350 assert(check_access, "required");
351 next_receiver_method = callee->resolve_invoke(jvms->method()->holder(),
352 profile.receiver(1));
353 if (next_receiver_method != nullptr) {
354 next_hit_cg = this->call_generator(next_receiver_method,
355 vtable_index, !call_does_dispatch, jvms,
356 allow_inline, prof_factor);
357 if (next_hit_cg != nullptr && !next_hit_cg->is_inline() &&
358 have_major_receiver && UseOnlyInlinedBimorphic) {
359 // Skip if we can't inline second receiver's method
360 next_hit_cg = nullptr;
361 }
362 }
363 }
364 CallGenerator* miss_cg;
365 Deoptimization::DeoptReason reason = (morphism == 2
366 ? Deoptimization::Reason_bimorphic
367 : Deoptimization::reason_class_check(speculative_receiver_type != nullptr));
368 if ((morphism == 1 || (morphism == 2 && next_hit_cg != nullptr)) &&
369 !too_many_traps_or_recompiles(caller, bci, reason)
370 ) {
371 // Generate uncommon trap for class check failure path
372 // in case of monomorphic or bimorphic virtual call site.
373 miss_cg = CallGenerator::for_uncommon_trap(callee, reason,
374 Deoptimization::Action_maybe_recompile);
375 } else {
376 // Generate virtual call for class check failure path
377 // in case of polymorphic virtual call site.
378 miss_cg = (IncrementalInlineVirtual ? CallGenerator::for_late_inline_virtual(callee, vtable_index, prof_factor)
379 : CallGenerator::for_virtual_call(callee, vtable_index));
380 }
381 if (miss_cg != nullptr) {
382 if (next_hit_cg != nullptr) {
383 assert(speculative_receiver_type == nullptr, "shouldn't end up here if we used speculation");
384 trace_type_profile(C, jvms->method(), jvms, next_receiver_method, profile.receiver(1), site_count, profile.receiver_count(1));
385 // We don't need to record dependency on a receiver here and below.
386 // Whenever we inline, the dependency is added by Parse::Parse().
387 miss_cg = CallGenerator::for_predicted_call(profile.receiver(1), miss_cg, next_hit_cg, PROB_MAX);
388 }
389 if (miss_cg != nullptr) {
390 ciKlass* k = speculative_receiver_type != nullptr ? speculative_receiver_type : profile.receiver(0);
391 trace_type_profile(C, jvms->method(), jvms, receiver_method, k, site_count, receiver_count);
392 float hit_prob = speculative_receiver_type != nullptr ? 1.0 : profile.receiver_prob(0);
393 CallGenerator* cg = CallGenerator::for_predicted_call(k, miss_cg, hit_cg, hit_prob);
394 if (cg != nullptr) {
395 return cg;
396 }
397 }
398 }
399 }
400 }
401 }
402
403 // If there is only one implementor of this interface then we
404 // may be able to bind this invoke directly to the implementing
405 // klass but we need both a dependence on the single interface
406 // and on the method we bind to. Additionally since all we know
407 // about the receiver type is that it's supposed to implement the
408 // interface we have to insert a check that it's the class we
409 // expect. Interface types are not checked by the verifier so
410 // they are roughly equivalent to Object.
411 // The number of implementors for declared_interface is less or
412 // equal to the number of implementors for target->holder() so
413 // if number of implementors of target->holder() == 1 then
414 // number of implementors for decl_interface is 0 or 1. If
415 // it's 0 then no class implements decl_interface and there's
416 // no point in inlining.
417 if (call_does_dispatch && bytecode == Bytecodes::_invokeinterface) {
418 ciInstanceKlass* declared_interface =
419 caller->get_declared_method_holder_at_bci(bci)->as_instance_klass();
420 ciInstanceKlass* singleton = declared_interface->unique_implementor();
421
422 if (singleton != nullptr) {
423 assert(singleton != declared_interface, "not a unique implementor");
424
425 assert(check_access, "required");
426 ciMethod* cha_monomorphic_target =
427 callee->find_monomorphic_target(caller->holder(), declared_interface, singleton);
428
429 if (cha_monomorphic_target != nullptr &&
430 cha_monomorphic_target->holder() != env()->Object_klass()) { // subtype check against Object is useless
431 ciKlass* holder = cha_monomorphic_target->holder();
432
433 // Try to inline the method found by CHA. Inlined method is guarded by the type check.
434 CallGenerator* hit_cg = call_generator(cha_monomorphic_target,
435 vtable_index, !call_does_dispatch, jvms, allow_inline, prof_factor);
436
437 // Deoptimize on type check fail. The interpreter will throw ICCE for us.
438 CallGenerator* miss_cg = CallGenerator::for_uncommon_trap(callee,
439 Deoptimization::Reason_class_check, Deoptimization::Action_none);
440
441 ciKlass* constraint = (holder->is_subclass_of(singleton) ? holder : singleton); // avoid upcasts
442 CallGenerator* cg = CallGenerator::for_guarded_call(constraint, miss_cg, hit_cg);
443 if (hit_cg != nullptr && cg != nullptr) {
444 dependencies()->assert_unique_implementor(declared_interface, singleton);
445 dependencies()->assert_unique_concrete_method(declared_interface, cha_monomorphic_target, declared_interface, callee);
446 return cg;
447 }
448 }
449 }
450 } // call_does_dispatch && bytecode == Bytecodes::_invokeinterface
451
452 // Nothing claimed the intrinsic, we go with straight-forward inlining
453 // for already discovered intrinsic.
454 if (allow_intrinsics && cg_intrinsic != nullptr) {
455 assert(cg_intrinsic->does_virtual_dispatch(), "sanity");
456 return cg_intrinsic;
457 }
458 } // allow_inline
459
460 // There was no special inlining tactic, or it bailed out.
461 // Use a more generic tactic, like a simple call.
462 if (call_does_dispatch) {
463 const char* msg = "virtual call";
464 C->inline_printer()->record(callee, jvms, InliningResult::FAILURE, msg);
465 C->log_inline_failure(msg);
466 if (IncrementalInlineVirtual && allow_inline) {
467 return CallGenerator::for_late_inline_virtual(callee, vtable_index, prof_factor); // attempt to inline through virtual call later
468 } else {
469 return CallGenerator::for_virtual_call(callee, vtable_index);
470 }
471 } else {
472 // Class Hierarchy Analysis or Type Profile reveals a unique target, or it is a static or special call.
473 CallGenerator* cg = CallGenerator::for_direct_call(callee, should_delay_inlining(callee, jvms));
474 // For optimized virtual calls assert at runtime that receiver object
475 // is a subtype of the method holder.
476 if (cg != nullptr && is_virtual_or_interface && !callee->is_static()) {
477 CallGenerator* trap_cg = CallGenerator::for_uncommon_trap(callee,
478 Deoptimization::Reason_receiver_constraint, Deoptimization::Action_none);
479 cg = CallGenerator::for_guarded_call(callee->holder(), trap_cg, cg);
480 }
481 return cg;
482 }
483 }
484
485 // Return true for methods that shouldn't be inlined early so that
486 // they are easier to analyze and optimize as intrinsics.
487 bool Compile::should_delay_string_inlining(ciMethod* call_method, JVMState* jvms) {
488 if (has_stringbuilder()) {
489
490 if ((call_method->holder() == C->env()->StringBuilder_klass() ||
491 call_method->holder() == C->env()->StringBuffer_klass()) &&
492 (jvms->method()->holder() == C->env()->StringBuilder_klass() ||
493 jvms->method()->holder() == C->env()->StringBuffer_klass())) {
494 // Delay SB calls only when called from non-SB code
495 return false;
496 }
497
498 switch (call_method->intrinsic_id()) {
499 case vmIntrinsics::_StringBuilder_void:
500 case vmIntrinsics::_StringBuilder_int:
501 case vmIntrinsics::_StringBuilder_String:
502 case vmIntrinsics::_StringBuilder_append_char:
503 case vmIntrinsics::_StringBuilder_append_int:
504 case vmIntrinsics::_StringBuilder_append_String:
505 case vmIntrinsics::_StringBuilder_toString:
506 case vmIntrinsics::_StringBuffer_void:
507 case vmIntrinsics::_StringBuffer_int:
508 case vmIntrinsics::_StringBuffer_String:
509 case vmIntrinsics::_StringBuffer_append_char:
510 case vmIntrinsics::_StringBuffer_append_int:
511 case vmIntrinsics::_StringBuffer_append_String:
512 case vmIntrinsics::_StringBuffer_toString:
513 case vmIntrinsics::_Integer_toString:
514 return true;
515
516 case vmIntrinsics::_String_String:
517 {
518 Node* receiver = jvms->map()->in(jvms->argoff() + 1);
519 if (receiver->is_Proj() && receiver->in(0)->is_CallStaticJava()) {
520 CallStaticJavaNode* csj = receiver->in(0)->as_CallStaticJava();
521 ciMethod* m = csj->method();
522 if (m != nullptr &&
523 (m->intrinsic_id() == vmIntrinsics::_StringBuffer_toString ||
524 m->intrinsic_id() == vmIntrinsics::_StringBuilder_toString))
525 // Delay String.<init>(new SB())
526 return true;
527 }
528 return false;
529 }
530
531 default:
532 return false;
533 }
534 }
535 return false;
536 }
537
538 bool Compile::should_delay_boxing_inlining(ciMethod* call_method, JVMState* jvms) {
539 if (eliminate_boxing() && call_method->is_boxing_method()) {
540 set_has_boxed_value(true);
541 return aggressive_unboxing();
542 }
543 return false;
544 }
545
546 bool Compile::should_delay_vector_inlining(ciMethod* call_method, JVMState* jvms) {
547 return EnableVectorSupport && call_method->is_vector_method();
548 }
549
550 bool Compile::should_delay_vector_reboxing_inlining(ciMethod* call_method, JVMState* jvms) {
551 return EnableVectorSupport && (call_method->intrinsic_id() == vmIntrinsics::_VectorRebox);
552 }
553
554 // uncommon-trap call-sites where callee is unloaded, uninitialized or will not link
555 bool Parse::can_not_compile_call_site(ciMethod *dest_method, ciInstanceKlass* klass) {
556 // Additional inputs to consider...
557 // bc = bc()
558 // caller = method()
559 // iter().get_method_holder_index()
560 assert( dest_method->is_loaded(), "ciTypeFlow should not let us get here" );
561 // Interface classes can be loaded & linked and never get around to
562 // being initialized. Uncommon-trap for not-initialized static or
563 // v-calls. Let interface calls happen.
564 ciInstanceKlass* holder_klass = dest_method->holder();
565 if (!holder_klass->is_being_initialized() &&
566 !holder_klass->is_initialized() &&
567 !holder_klass->is_interface()) {
568 uncommon_trap(Deoptimization::Reason_uninitialized,
569 Deoptimization::Action_reinterpret,
570 holder_klass);
571 return true;
572 }
573
574 assert(dest_method->is_loaded(), "dest_method: typeflow responsibility");
575 return false;
576 }
577
578 #ifdef ASSERT
579 static bool check_call_consistency(JVMState* jvms, CallGenerator* cg) {
580 ciMethod* symbolic_info = jvms->method()->get_method_at_bci(jvms->bci());
581 ciMethod* resolved_method = cg->method();
582 if (!ciMethod::is_consistent_info(symbolic_info, resolved_method)) {
583 tty->print_cr("JVMS:");
584 jvms->dump();
585 tty->print_cr("Bytecode info:");
586 jvms->method()->get_method_at_bci(jvms->bci())->print(); tty->cr();
587 tty->print_cr("Resolved method:");
588 cg->method()->print(); tty->cr();
589 return false;
590 }
591 return true;
592 }
593 #endif // ASSERT
594
595 //------------------------------do_call----------------------------------------
596 // Handle your basic call. Inline if we can & want to, else just setup call.
597 void Parse::do_call() {
598 // It's likely we are going to add debug info soon.
599 // Also, if we inline a guy who eventually needs debug info for this JVMS,
600 // our contribution to it is cleaned up right here.
601 kill_dead_locals();
602
603 // Set frequently used booleans
604 const bool is_virtual = bc() == Bytecodes::_invokevirtual;
605 const bool is_virtual_or_interface = is_virtual || bc() == Bytecodes::_invokeinterface;
606 const bool has_receiver = Bytecodes::has_receiver(bc());
607
608 // Find target being called
609 bool will_link;
610 ciSignature* declared_signature = nullptr;
611 ciMethod* orig_callee = iter().get_method(will_link, &declared_signature); // callee in the bytecode
612 ciInstanceKlass* holder_klass = orig_callee->holder();
613 ciKlass* holder = iter().get_declared_method_holder();
614 ciInstanceKlass* klass = ciEnv::get_instance_klass_for_declared_method_holder(holder);
615 assert(declared_signature != nullptr, "cannot be null");
616 JFR_ONLY(Jfr::on_resolution(this, holder, orig_callee);)
617
618 // Bump max node limit for JSR292 users
619 if (bc() == Bytecodes::_invokedynamic || orig_callee->is_method_handle_intrinsic()) {
620 C->set_max_node_limit(3*MaxNodeLimit);
621 }
622
623 // uncommon-trap when callee is unloaded, uninitialized or will not link
624 // bailout when too many arguments for register representation
625 if (!will_link || can_not_compile_call_site(orig_callee, klass)) {
626 if (PrintOpto && (Verbose || WizardMode)) {
627 method()->print_name(); tty->print_cr(" can not compile call at bci %d to:", bci());
628 orig_callee->print_name(); tty->cr();
629 }
630 return;
631 }
632 assert(holder_klass->is_loaded(), "");
633 //assert((bc_callee->is_static() || is_invokedynamic) == !has_receiver , "must match bc"); // XXX invokehandle (cur_bc_raw)
634 // Note: this takes into account invokeinterface of methods declared in java/lang/Object,
635 // which should be invokevirtuals but according to the VM spec may be invokeinterfaces
636 assert(holder_klass->is_interface() || holder_klass->super() == nullptr || (bc() != Bytecodes::_invokeinterface), "must match bc");
637 // Note: In the absence of miranda methods, an abstract class K can perform
638 // an invokevirtual directly on an interface method I.m if K implements I.
639
640 // orig_callee is the resolved callee which's signature includes the
641 // appendix argument.
642 const int nargs = orig_callee->arg_size();
643 const bool is_signature_polymorphic = MethodHandles::is_signature_polymorphic(orig_callee->intrinsic_id());
644
645 // Push appendix argument (MethodType, CallSite, etc.), if one.
646 if (iter().has_appendix()) {
647 ciObject* appendix_arg = iter().get_appendix();
648 const TypeOopPtr* appendix_arg_type = TypeOopPtr::make_from_constant(appendix_arg, /* require_const= */ true);
649 Node* appendix_arg_node = _gvn.makecon(appendix_arg_type);
650 push(appendix_arg_node);
651 }
652
653 // ---------------------
654 // Does Class Hierarchy Analysis reveal only a single target of a v-call?
655 // Then we may inline or make a static call, but become dependent on there being only 1 target.
656 // Does the call-site type profile reveal only one receiver?
657 // Then we may introduce a run-time check and inline on the path where it succeeds.
658 // The other path may uncommon_trap, check for another receiver, or do a v-call.
659
660 // Try to get the most accurate receiver type
661 ciMethod* callee = orig_callee;
662 int vtable_index = Method::invalid_vtable_index;
663 bool call_does_dispatch = false;
664
665 // Speculative type of the receiver if any
666 ciKlass* speculative_receiver_type = nullptr;
667 if (is_virtual_or_interface) {
668 Node* receiver_node = stack(sp() - nargs);
669 const TypeOopPtr* receiver_type = _gvn.type(receiver_node)->isa_oopptr();
670 // call_does_dispatch and vtable_index are out-parameters. They might be changed.
671 // For arrays, klass below is Object. When vtable calls are used,
672 // resolving the call with Object would allow an illegal call to
673 // finalize() on an array. We use holder instead: illegal calls to
674 // finalize() won't be compiled as vtable calls (IC call
675 // resolution will catch the illegal call) and the few legal calls
676 // on array types won't be either.
677 callee = C->optimize_virtual_call(method(), klass, holder, orig_callee,
678 receiver_type, is_virtual,
679 call_does_dispatch, vtable_index); // out-parameters
680 speculative_receiver_type = receiver_type != nullptr ? receiver_type->speculative_type() : nullptr;
681 }
682
683 // Additional receiver subtype checks for interface calls via invokespecial or invokeinterface.
684 ciKlass* receiver_constraint = nullptr;
685 if (iter().cur_bc_raw() == Bytecodes::_invokespecial && !orig_callee->is_object_constructor()) {
686 ciInstanceKlass* calling_klass = method()->holder();
687 ciInstanceKlass* sender_klass = calling_klass;
688 if (sender_klass->is_interface()) {
689 receiver_constraint = sender_klass;
690 }
691 } else if (iter().cur_bc_raw() == Bytecodes::_invokeinterface && orig_callee->is_private()) {
692 assert(holder->is_interface(), "How did we get a non-interface method here!");
693 receiver_constraint = holder;
694 }
695
696 if (receiver_constraint != nullptr) {
697 Node* receiver_node = stack(sp() - nargs);
698 Node* cls_node = makecon(TypeKlassPtr::make(receiver_constraint, Type::trust_interfaces));
699 Node* bad_type_ctrl = nullptr;
700 Node* casted_receiver = gen_checkcast(receiver_node, cls_node, &bad_type_ctrl);
701 if (bad_type_ctrl != nullptr) {
702 PreserveJVMState pjvms(this);
703 set_control(bad_type_ctrl);
704 uncommon_trap(Deoptimization::Reason_class_check,
705 Deoptimization::Action_none);
706 }
707 if (stopped()) {
708 return; // MUST uncommon-trap?
709 }
710 set_stack(sp() - nargs, casted_receiver);
711 }
712
713 // Scalarize value objects passed into this invocation if we know that they are not larval
714 for (int arg_idx = 0; arg_idx < nargs; arg_idx++) {
715 if (arg_can_be_larval(callee, arg_idx)) {
716 continue;
717 }
718
719 cast_to_non_larval(peek(nargs - 1 - arg_idx));
720 }
721
722 // Note: It's OK to try to inline a virtual call.
723 // The call generator will not attempt to inline a polymorphic call
724 // unless it knows how to optimize the receiver dispatch.
725 bool try_inline = (C->do_inlining() || InlineAccessors);
726
727 // ---------------------
728 dec_sp(nargs); // Temporarily pop args for JVM state of call
729 JVMState* jvms = sync_jvms();
730
731 // ---------------------
732 // Decide call tactic.
733 // This call checks with CHA, the interpreter profile, intrinsics table, etc.
734 // It decides whether inlining is desirable or not.
735 CallGenerator* cg = C->call_generator(callee, vtable_index, call_does_dispatch, jvms, try_inline, prof_factor(), speculative_receiver_type);
736 if (failing()) {
737 return;
738 }
739 assert(cg != nullptr, "must find a CallGenerator for callee %s", callee->name()->as_utf8());
740
741 // NOTE: Don't use orig_callee and callee after this point! Use cg->method() instead.
742 orig_callee = callee = nullptr;
743
744 // ---------------------
745
746 // Feed profiling data for arguments to the type system so it can
747 // propagate it as speculative types
748 record_profiled_arguments_for_speculation(cg->method(), bc());
749
750 #ifndef PRODUCT
751 // bump global counters for calls
752 count_compiled_calls(/*at_method_entry*/ false, cg->is_inline());
753
754 // Record first part of parsing work for this call
755 parse_histogram()->record_change();
756 #endif // not PRODUCT
757
758 assert(jvms == this->jvms(), "still operating on the right JVMS");
759 assert(jvms_in_sync(), "jvms must carry full info into CG");
760
761 // save across call, for a subsequent cast_not_null.
762 Node* receiver = has_receiver ? argument(0) : nullptr;
763
764 // The extra CheckCastPPs for speculative types mess with PhaseStringOpts
765 if (receiver != nullptr && !call_does_dispatch && !cg->is_string_late_inline()) {
766 // Feed profiling data for a single receiver to the type system so
767 // it can propagate it as a speculative type
768 receiver = record_profiled_receiver_for_speculation(receiver);
769 }
770
771 JVMState* new_jvms = cg->generate(jvms);
772 if (new_jvms == nullptr) {
773 // When inlining attempt fails (e.g., too many arguments),
774 // it may contaminate the current compile state, making it
775 // impossible to pull back and try again. Once we call
776 // cg->generate(), we are committed. If it fails, the whole
777 // compilation task is compromised.
778 if (failing()) return;
779
780 // This can happen if a library intrinsic is available, but refuses
781 // the call site, perhaps because it did not match a pattern the
782 // intrinsic was expecting to optimize. Should always be possible to
783 // get a normal java call that may inline in that case
784 cg = C->call_generator(cg->method(), vtable_index, call_does_dispatch, jvms, try_inline, prof_factor(), speculative_receiver_type, /* allow_intrinsics= */ false);
785 new_jvms = cg->generate(jvms);
786 if (new_jvms == nullptr) {
787 guarantee(failing(), "call failed to generate: calls should work");
788 return;
789 }
790 }
791
792 if (cg->is_inline()) {
793 // Accumulate has_loops estimate
794 C->env()->notice_inlined_method(cg->method());
795 }
796
797 // Reset parser state from [new_]jvms, which now carries results of the call.
798 // Return value (if any) is already pushed on the stack by the cg.
799 add_exception_states_from(new_jvms);
800 if (new_jvms->map()->control() == top()) {
801 stop_and_kill_map();
802 } else {
803 assert(new_jvms->same_calls_as(jvms), "method/bci left unchanged");
804 set_jvms(new_jvms);
805 }
806
807 assert(check_call_consistency(jvms, cg), "inconsistent info");
808
809 if (!stopped()) {
810 // This was some sort of virtual call, which did a null check for us.
811 // Now we can assert receiver-not-null, on the normal return path.
812 if (receiver != nullptr && cg->is_virtual()) {
813 Node* cast = cast_not_null(receiver);
814 // %%% assert(receiver == cast, "should already have cast the receiver");
815 }
816
817 ciType* rtype = cg->method()->return_type();
818 ciType* ctype = declared_signature->return_type();
819
820 if (Bytecodes::has_optional_appendix(iter().cur_bc_raw()) || is_signature_polymorphic) {
821 // Be careful here with return types.
822 if (ctype != rtype) {
823 BasicType rt = rtype->basic_type();
824 BasicType ct = ctype->basic_type();
825 if (ct == T_VOID) {
826 // It's OK for a method to return a value that is discarded.
827 // The discarding does not require any special action from the caller.
828 // The Java code knows this, at VerifyType.isNullConversion.
829 pop_node(rt); // whatever it was, pop it
830 } else if (rt == T_INT || is_subword_type(rt)) {
831 // Nothing. These cases are handled in lambda form bytecode.
832 assert(ct == T_INT || is_subword_type(ct), "must match: rt=%s, ct=%s", type2name(rt), type2name(ct));
833 } else if (is_reference_type(rt)) {
834 assert(is_reference_type(ct), "rt=%s, ct=%s", type2name(rt), type2name(ct));
835 if (ctype->is_loaded()) {
836 const TypeOopPtr* arg_type = TypeOopPtr::make_from_klass(rtype->as_klass());
837 const Type* sig_type = TypeOopPtr::make_from_klass(ctype->as_klass());
838 if (arg_type != nullptr && !arg_type->higher_equal(sig_type)) {
839 Node* retnode = pop();
840 Node* cast_obj = _gvn.transform(new CheckCastPPNode(control(), retnode, sig_type));
841 push(cast_obj);
842 }
843 }
844 } else {
845 assert(rt == ct, "unexpected mismatch: rt=%s, ct=%s", type2name(rt), type2name(ct));
846 // push a zero; it's better than getting an oop/int mismatch
847 pop_node(rt);
848 Node* retnode = zerocon(ct);
849 push_node(ct, retnode);
850 }
851 // Now that the value is well-behaved, continue with the call-site type.
852 rtype = ctype;
853 }
854 } else {
855 // Symbolic resolution enforces the types to be the same.
856 // NOTE: We must relax the assert for unloaded types because two
857 // different ciType instances of the same unloaded class type
858 // can appear to be "loaded" by different loaders (depending on
859 // the accessing class).
860 assert(!rtype->is_loaded() || !ctype->is_loaded() || rtype == ctype,
861 "mismatched return types: rtype=%s, ctype=%s", rtype->name(), ctype->name());
862 }
863
864 // If the return type of the method is not loaded, assert that the
865 // value we got is a null. Otherwise, we need to recompile.
866 if (!rtype->is_loaded()) {
867 if (PrintOpto && (Verbose || WizardMode)) {
868 method()->print_name(); tty->print_cr(" asserting nullness of result at bci: %d", bci());
869 cg->method()->print_name(); tty->cr();
870 }
871 if (C->log() != nullptr) {
872 C->log()->elem("assert_null reason='return' klass='%d'",
873 C->log()->identify(rtype));
874 }
875 // If there is going to be a trap, put it at the next bytecode:
876 set_bci(iter().next_bci());
877 null_assert(peek());
878 set_bci(iter().cur_bci()); // put it back
879 }
880 BasicType ct = ctype->basic_type();
881 if (is_reference_type(ct)) {
882 record_profiled_return_for_speculation();
883 }
884
885 if (!rtype->is_void() && cg->method()->intrinsic_id() != vmIntrinsicID::_makePrivateBuffer) {
886 Node* retnode = peek();
887 const Type* rettype = gvn().type(retnode);
888 if (rettype->is_inlinetypeptr() && !retnode->is_InlineType()) {
889 retnode = InlineTypeNode::make_from_oop(this, retnode, rettype->inline_klass());
890 dec_sp(1);
891 push(retnode);
892 }
893 }
894
895 if (cg->method()->is_object_constructor() && receiver != nullptr && gvn().type(receiver)->is_inlinetypeptr()) {
896 InlineTypeNode* non_larval = InlineTypeNode::make_from_oop(this, receiver, gvn().type(receiver)->inline_klass());
897 // Relinquish the oop input, we will delay the allocation to the point it is needed, see the
898 // comments in InlineTypeNode::Ideal for more details
899 non_larval = non_larval->clone_if_required(&gvn(), nullptr);
900 non_larval->set_oop(gvn(), null());
901 non_larval->set_is_buffered(gvn(), false);
902 non_larval = gvn().transform(non_larval)->as_InlineType();
903 map()->replace_edge(receiver, non_larval);
904 }
905 }
906
907 // Restart record of parsing work after possible inlining of call
908 #ifndef PRODUCT
909 parse_histogram()->set_initial_state(bc());
910 #endif
911 }
912
913 //---------------------------catch_call_exceptions-----------------------------
914 // Put a Catch and CatchProj nodes behind a just-created call.
915 // Send their caught exceptions to the proper handler.
916 // This may be used after a call to the rethrow VM stub,
917 // when it is needed to process unloaded exception classes.
918 void Parse::catch_call_exceptions(ciExceptionHandlerStream& handlers) {
919 // Exceptions are delivered through this channel:
920 Node* i_o = this->i_o();
921
922 // Add a CatchNode.
923 Arena tmp_mem{mtCompiler};
924 GrowableArray<int> bcis(&tmp_mem, 8, 0, -1);
925 GrowableArray<const Type*> extypes(&tmp_mem, 8, 0, nullptr);
926 GrowableArray<int> saw_unloaded(&tmp_mem, 8, 0, -1);
927
928 bool default_handler = false;
929 for (; !handlers.is_done(); handlers.next()) {
930 ciExceptionHandler* h = handlers.handler();
931 int h_bci = h->handler_bci();
932 ciInstanceKlass* h_klass = h->is_catch_all() ? env()->Throwable_klass() : h->catch_klass();
933 // Do not introduce unloaded exception types into the graph:
934 if (!h_klass->is_loaded()) {
935 if (saw_unloaded.contains(h_bci)) {
936 /* We've already seen an unloaded exception with h_bci,
937 so don't duplicate. Duplication will cause the CatchNode to be
938 unnecessarily large. See 4713716. */
939 continue;
940 } else {
941 saw_unloaded.append(h_bci);
942 }
943 }
944 const Type* h_extype = TypeOopPtr::make_from_klass(h_klass);
945 // (We use make_from_klass because it respects UseUniqueSubclasses.)
946 h_extype = h_extype->join(TypeInstPtr::NOTNULL);
947 assert(!h_extype->empty(), "sanity");
948 // Note: It's OK if the BCIs repeat themselves.
949 bcis.append(h_bci);
950 extypes.append(h_extype);
951 if (h_bci == -1) {
952 default_handler = true;
953 }
954 }
955
956 if (!default_handler) {
957 bcis.append(-1);
958 const Type* extype = TypeOopPtr::make_from_klass(env()->Throwable_klass())->is_instptr();
959 extype = extype->join(TypeInstPtr::NOTNULL);
960 extypes.append(extype);
961 }
962
963 int len = bcis.length();
964 CatchNode *cn = new CatchNode(control(), i_o, len+1);
965 Node *catch_ = _gvn.transform(cn);
966
967 // now branch with the exception state to each of the (potential)
968 // handlers
969 for(int i=0; i < len; i++) {
970 // Setup JVM state to enter the handler.
971 PreserveJVMState pjvms(this);
972 // Locals are just copied from before the call.
973 // Get control from the CatchNode.
974 int handler_bci = bcis.at(i);
975 Node* ctrl = _gvn.transform( new CatchProjNode(catch_, i+1,handler_bci));
976 // This handler cannot happen?
977 if (ctrl == top()) continue;
978 set_control(ctrl);
979
980 // Create exception oop
981 const TypeInstPtr* extype = extypes.at(i)->is_instptr();
982 Node* ex_oop = _gvn.transform(new CreateExNode(extypes.at(i), ctrl, i_o));
983
984 // Handle unloaded exception classes.
985 if (saw_unloaded.contains(handler_bci)) {
986 // An unloaded exception type is coming here. Do an uncommon trap.
987 #ifndef PRODUCT
988 // We do not expect the same handler bci to take both cold unloaded
989 // and hot loaded exceptions. But, watch for it.
990 if (PrintOpto && (Verbose || WizardMode) && extype->is_loaded()) {
991 tty->print("Warning: Handler @%d takes mixed loaded/unloaded exceptions in ", bci());
992 method()->print_name(); tty->cr();
993 } else if (PrintOpto && (Verbose || WizardMode)) {
994 tty->print("Bailing out on unloaded exception type ");
995 extype->instance_klass()->print_name();
996 tty->print(" at bci:%d in ", bci());
997 method()->print_name(); tty->cr();
998 }
999 #endif
1000 // Emit an uncommon trap instead of processing the block.
1001 set_bci(handler_bci);
1002 push_ex_oop(ex_oop);
1003 uncommon_trap(Deoptimization::Reason_unloaded,
1004 Deoptimization::Action_reinterpret,
1005 extype->instance_klass(), "!loaded exception");
1006 set_bci(iter().cur_bci()); // put it back
1007 continue;
1008 }
1009
1010 // go to the exception handler
1011 if (handler_bci < 0) { // merge with corresponding rethrow node
1012 throw_to_exit(make_exception_state(ex_oop));
1013 } else { // Else jump to corresponding handle
1014 push_ex_oop(ex_oop); // Clear stack and push just the oop.
1015 merge_exception(handler_bci);
1016 }
1017 }
1018
1019 // The first CatchProj is for the normal return.
1020 // (Note: If this is a call to rethrow_Java, this node goes dead.)
1021 set_control(_gvn.transform( new CatchProjNode(catch_, CatchProjNode::fall_through_index, CatchProjNode::no_handler_bci)));
1022 }
1023
1024
1025 //----------------------------catch_inline_exceptions--------------------------
1026 // Handle all exceptions thrown by an inlined method or individual bytecode.
1027 // Common case 1: we have no handler, so all exceptions merge right into
1028 // the rethrow case.
1029 // Case 2: we have some handlers, with loaded exception klasses that have
1030 // no subklasses. We do a Deutsch-Schiffman style type-check on the incoming
1031 // exception oop and branch to the handler directly.
1032 // Case 3: We have some handlers with subklasses or are not loaded at
1033 // compile-time. We have to call the runtime to resolve the exception.
1034 // So we insert a RethrowCall and all the logic that goes with it.
1035 void Parse::catch_inline_exceptions(SafePointNode* ex_map) {
1036 // Caller is responsible for saving away the map for normal control flow!
1037 assert(stopped(), "call set_map(nullptr) first");
1038 assert(method()->has_exception_handlers(), "don't come here w/o work to do");
1039
1040 Node* ex_node = saved_ex_oop(ex_map);
1041 if (ex_node == top()) {
1042 // No action needed.
1043 return;
1044 }
1045 const TypeInstPtr* ex_type = _gvn.type(ex_node)->isa_instptr();
1046 NOT_PRODUCT(if (ex_type==nullptr) tty->print_cr("*** Exception not InstPtr"));
1047 if (ex_type == nullptr)
1048 ex_type = TypeOopPtr::make_from_klass(env()->Throwable_klass())->is_instptr();
1049
1050 // determine potential exception handlers
1051 ciExceptionHandlerStream handlers(method(), bci(),
1052 ex_type->instance_klass(),
1053 ex_type->klass_is_exact());
1054
1055 // Start executing from the given throw state. (Keep its stack, for now.)
1056 // Get the exception oop as known at compile time.
1057 ex_node = use_exception_state(ex_map);
1058
1059 // Get the exception oop klass from its header
1060 Node* ex_klass_node = nullptr;
1061 if (has_exception_handler() && !ex_type->klass_is_exact()) {
1062 Node* p = basic_plus_adr( ex_node, ex_node, oopDesc::klass_offset_in_bytes());
1063 ex_klass_node = _gvn.transform(LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeInstKlassPtr::OBJECT));
1064
1065 // Compute the exception klass a little more cleverly.
1066 // Obvious solution is to simple do a LoadKlass from the 'ex_node'.
1067 // However, if the ex_node is a PhiNode, I'm going to do a LoadKlass for
1068 // each arm of the Phi. If I know something clever about the exceptions
1069 // I'm loading the class from, I can replace the LoadKlass with the
1070 // klass constant for the exception oop.
1071 if (ex_node->is_Phi()) {
1072 ex_klass_node = new PhiNode(ex_node->in(0), TypeInstKlassPtr::OBJECT);
1073 for (uint i = 1; i < ex_node->req(); i++) {
1074 Node* ex_in = ex_node->in(i);
1075 if (ex_in == top() || ex_in == nullptr) {
1076 // This path was not taken.
1077 ex_klass_node->init_req(i, top());
1078 continue;
1079 }
1080 Node* p = basic_plus_adr(ex_in, ex_in, oopDesc::klass_offset_in_bytes());
1081 Node* k = _gvn.transform(LoadKlassNode::make(_gvn, immutable_memory(), p, TypeInstPtr::KLASS, TypeInstKlassPtr::OBJECT));
1082 ex_klass_node->init_req( i, k );
1083 }
1084 ex_klass_node = _gvn.transform(ex_klass_node);
1085 }
1086 }
1087
1088 // Scan the exception table for applicable handlers.
1089 // If none, we can call rethrow() and be done!
1090 // If precise (loaded with no subklasses), insert a D.S. style
1091 // pointer compare to the correct handler and loop back.
1092 // If imprecise, switch to the Rethrow VM-call style handling.
1093
1094 int remaining = handlers.count_remaining();
1095
1096 // iterate through all entries sequentially
1097 for (;!handlers.is_done(); handlers.next()) {
1098 ciExceptionHandler* handler = handlers.handler();
1099
1100 if (handler->is_rethrow()) {
1101 // If we fell off the end of the table without finding an imprecise
1102 // exception klass (and without finding a generic handler) then we
1103 // know this exception is not handled in this method. We just rethrow
1104 // the exception into the caller.
1105 throw_to_exit(make_exception_state(ex_node));
1106 return;
1107 }
1108
1109 // exception handler bci range covers throw_bci => investigate further
1110 int handler_bci = handler->handler_bci();
1111
1112 if (remaining == 1) {
1113 push_ex_oop(ex_node); // Push exception oop for handler
1114 if (PrintOpto && WizardMode) {
1115 tty->print_cr(" Catching every inline exception bci:%d -> handler_bci:%d", bci(), handler_bci);
1116 }
1117 // If this is a backwards branch in the bytecodes, add safepoint
1118 maybe_add_safepoint(handler_bci);
1119 merge_exception(handler_bci); // jump to handler
1120 return; // No more handling to be done here!
1121 }
1122
1123 // Get the handler's klass
1124 ciInstanceKlass* klass = handler->catch_klass();
1125
1126 if (!klass->is_loaded()) { // klass is not loaded?
1127 // fall through into catch_call_exceptions which will emit a
1128 // handler with an uncommon trap.
1129 break;
1130 }
1131
1132 if (klass->is_interface()) // should not happen, but...
1133 break; // bail out
1134
1135 // Check the type of the exception against the catch type
1136 const TypeKlassPtr *tk = TypeKlassPtr::make(klass);
1137 Node* con = _gvn.makecon(tk);
1138 Node* not_subtype_ctrl = gen_subtype_check(ex_klass_node, con);
1139 if (!stopped()) {
1140 PreserveJVMState pjvms(this);
1141 const TypeInstPtr* tinst = TypeOopPtr::make_from_klass_unique(klass)->cast_to_ptr_type(TypePtr::NotNull)->is_instptr();
1142 assert(klass->has_subklass() || tinst->klass_is_exact(), "lost exactness");
1143 Node* ex_oop = _gvn.transform(new CheckCastPPNode(control(), ex_node, tinst));
1144 push_ex_oop(ex_oop); // Push exception oop for handler
1145 if (PrintOpto && WizardMode) {
1146 tty->print(" Catching inline exception bci:%d -> handler_bci:%d -- ", bci(), handler_bci);
1147 klass->print_name();
1148 tty->cr();
1149 }
1150 // If this is a backwards branch in the bytecodes, add safepoint
1151 maybe_add_safepoint(handler_bci);
1152 merge_exception(handler_bci);
1153 }
1154 set_control(not_subtype_ctrl);
1155
1156 // Come here if exception does not match handler.
1157 // Carry on with more handler checks.
1158 --remaining;
1159 }
1160
1161 assert(!stopped(), "you should return if you finish the chain");
1162
1163 // Oops, need to call into the VM to resolve the klasses at runtime.
1164 // Note: This call must not deoptimize, since it is not a real at this bci!
1165 kill_dead_locals();
1166
1167 make_runtime_call(RC_NO_LEAF | RC_MUST_THROW,
1168 OptoRuntime::rethrow_Type(),
1169 OptoRuntime::rethrow_stub(),
1170 nullptr, nullptr,
1171 ex_node);
1172
1173 // Rethrow is a pure call, no side effects, only a result.
1174 // The result cannot be allocated, so we use I_O
1175
1176 // Catch exceptions from the rethrow
1177 catch_call_exceptions(handlers);
1178 }
1179
1180
1181 // (Note: Moved add_debug_info into GraphKit::add_safepoint_edges.)
1182
1183
1184 #ifndef PRODUCT
1185 void Parse::count_compiled_calls(bool at_method_entry, bool is_inline) {
1186 if( CountCompiledCalls ) {
1187 if( at_method_entry ) {
1188 // bump invocation counter if top method (for statistics)
1189 if (CountCompiledCalls && depth() == 1) {
1190 const TypePtr* addr_type = TypeMetadataPtr::make(method());
1191 Node* adr1 = makecon(addr_type);
1192 Node* adr2 = basic_plus_adr(adr1, adr1, in_bytes(Method::compiled_invocation_counter_offset()));
1193 increment_counter(adr2);
1194 }
1195 } else if (is_inline) {
1196 switch (bc()) {
1197 case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_inlined_calls_addr()); break;
1198 case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_inlined_interface_calls_addr()); break;
1199 case Bytecodes::_invokestatic:
1200 case Bytecodes::_invokedynamic:
1201 case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_inlined_static_calls_addr()); break;
1202 default: fatal("unexpected call bytecode");
1203 }
1204 } else {
1205 switch (bc()) {
1206 case Bytecodes::_invokevirtual: increment_counter(SharedRuntime::nof_normal_calls_addr()); break;
1207 case Bytecodes::_invokeinterface: increment_counter(SharedRuntime::nof_interface_calls_addr()); break;
1208 case Bytecodes::_invokestatic:
1209 case Bytecodes::_invokedynamic:
1210 case Bytecodes::_invokespecial: increment_counter(SharedRuntime::nof_static_calls_addr()); break;
1211 default: fatal("unexpected call bytecode");
1212 }
1213 }
1214 }
1215 }
1216 #endif //PRODUCT
1217
1218
1219 ciMethod* Compile::optimize_virtual_call(ciMethod* caller, ciInstanceKlass* klass,
1220 ciKlass* holder, ciMethod* callee,
1221 const TypeOopPtr* receiver_type, bool is_virtual,
1222 bool& call_does_dispatch, int& vtable_index,
1223 bool check_access) {
1224 // Set default values for out-parameters.
1225 call_does_dispatch = true;
1226 vtable_index = Method::invalid_vtable_index;
1227
1228 // Choose call strategy.
1229 ciMethod* optimized_virtual_method = optimize_inlining(caller, klass, holder, callee,
1230 receiver_type, check_access);
1231
1232 // Have the call been sufficiently improved such that it is no longer a virtual?
1233 if (optimized_virtual_method != nullptr) {
1234 callee = optimized_virtual_method;
1235 call_does_dispatch = false;
1236 } else if (!UseInlineCaches && is_virtual && callee->is_loaded()) {
1237 // We can make a vtable call at this site
1238 vtable_index = callee->resolve_vtable_index(caller->holder(), holder);
1239 }
1240 return callee;
1241 }
1242
1243 // Identify possible target method and inlining style
1244 ciMethod* Compile::optimize_inlining(ciMethod* caller, ciInstanceKlass* klass, ciKlass* holder,
1245 ciMethod* callee, const TypeOopPtr* receiver_type,
1246 bool check_access) {
1247 // only use for virtual or interface calls
1248
1249 // If it is obviously final, do not bother to call find_monomorphic_target,
1250 // because the class hierarchy checks are not needed, and may fail due to
1251 // incompletely loaded classes. Since we do our own class loading checks
1252 // in this module, we may confidently bind to any method.
1253 if (callee->can_be_statically_bound()) {
1254 return callee;
1255 }
1256
1257 if (receiver_type == nullptr) {
1258 return nullptr; // no receiver type info
1259 }
1260
1261 // Attempt to improve the receiver
1262 bool actual_receiver_is_exact = false;
1263 ciInstanceKlass* actual_receiver = klass;
1264 // Array methods are all inherited from Object, and are monomorphic.
1265 // finalize() call on array is not allowed.
1266 if (receiver_type->isa_aryptr() &&
1267 callee->holder() == env()->Object_klass() &&
1268 callee->name() != ciSymbols::finalize_method_name()) {
1269 return callee;
1270 }
1271
1272 // All other interesting cases are instance klasses.
1273 if (!receiver_type->isa_instptr()) {
1274 return nullptr;
1275 }
1276
1277 ciInstanceKlass* receiver_klass = receiver_type->is_instptr()->instance_klass();
1278 if (receiver_klass->is_loaded() && receiver_klass->is_initialized() && !receiver_klass->is_interface() &&
1279 (receiver_klass == actual_receiver || receiver_klass->is_subtype_of(actual_receiver))) {
1280 // ikl is a same or better type than the original actual_receiver,
1281 // e.g. static receiver from bytecodes.
1282 actual_receiver = receiver_klass;
1283 // Is the actual_receiver exact?
1284 actual_receiver_is_exact = receiver_type->klass_is_exact();
1285 }
1286
1287 ciInstanceKlass* calling_klass = caller->holder();
1288 ciMethod* cha_monomorphic_target = callee->find_monomorphic_target(calling_klass, klass, actual_receiver, check_access);
1289
1290 if (cha_monomorphic_target != nullptr) {
1291 // Hardwiring a virtual.
1292 assert(!callee->can_be_statically_bound(), "should have been handled earlier");
1293 assert(!cha_monomorphic_target->is_abstract(), "");
1294 if (!cha_monomorphic_target->can_be_statically_bound(actual_receiver)) {
1295 // If we inlined because CHA revealed only a single target method,
1296 // then we are dependent on that target method not getting overridden
1297 // by dynamic class loading. Be sure to test the "static" receiver
1298 // dest_method here, as opposed to the actual receiver, which may
1299 // falsely lead us to believe that the receiver is final or private.
1300 dependencies()->assert_unique_concrete_method(actual_receiver, cha_monomorphic_target, holder, callee);
1301 }
1302 return cha_monomorphic_target;
1303 }
1304
1305 // If the type is exact, we can still bind the method w/o a vcall.
1306 // (This case comes after CHA so we can see how much extra work it does.)
1307 if (actual_receiver_is_exact) {
1308 // In case of evolution, there is a dependence on every inlined method, since each
1309 // such method can be changed when its class is redefined.
1310 ciMethod* exact_method = callee->resolve_invoke(calling_klass, actual_receiver);
1311 if (exact_method != nullptr) {
1312 return exact_method;
1313 }
1314 }
1315
1316 return nullptr;
1317 }