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/vmSymbols.hpp"
29 #include "compiler/compileBroker.hpp"
30 #include "compiler/compileLog.hpp"
31 #include "interpreter/linkResolver.hpp"
32 #include "logging/log.hpp"
33 #include "logging/logLevel.hpp"
34 #include "logging/logMessage.hpp"
35 #include "logging/logStream.hpp"
36 #include "opto/addnode.hpp"
37 #include "opto/callGenerator.hpp"
38 #include "opto/castnode.hpp"
39 #include "opto/cfgnode.hpp"
40 #include "opto/mulnode.hpp"
41 #include "opto/parse.hpp"
42 #include "opto/rootnode.hpp"
43 #include "opto/runtime.hpp"
44 #include "opto/subnode.hpp"
45 #include "prims/methodHandles.hpp"
46 #include "runtime/sharedRuntime.hpp"
47 #include "utilities/macros.hpp"
48 #if INCLUDE_JFR
49 #include "jfr/jfr.hpp"
50 #endif
51
52 static void print_trace_type_profile(outputStream* out, int depth, ciKlass* prof_klass, int site_count, int receiver_count,
53 bool with_deco) {
54 if (with_deco) {
55 CompileTask::print_inline_indent(depth, out);
56 }
57 out->print(" \\-> TypeProfile (%d/%d counts) = ", receiver_count, site_count);
58 prof_klass->name()->print_symbol_on(out);
59 if (with_deco) {
69 if (!C->print_inlining()) {
70 if (!PrintOpto && !PrintCompilation) {
71 method->print_short_name();
72 tty->cr();
73 }
74 CompileTask::print_inlining_tty(prof_method, depth, bci, InliningResult::SUCCESS);
75 print_trace_type_profile(tty, depth, prof_klass, site_count, receiver_count, true);
76 } else {
77 auto stream = C->inline_printer()->record(method, jvms, InliningResult::SUCCESS);
78 print_trace_type_profile(stream, depth, prof_klass, site_count, receiver_count, false);
79 }
80 }
81
82 LogTarget(Debug, jit, inlining) lt;
83 if (lt.is_enabled()) {
84 LogStream ls(lt);
85 print_trace_type_profile(&ls, depth, prof_klass, site_count, receiver_count, true);
86 }
87 }
88
89 CallGenerator* Compile::call_generator(ciMethod* callee, int vtable_index, bool call_does_dispatch,
90 JVMState* jvms, bool allow_inline,
91 float prof_factor, ciKlass* speculative_receiver_type,
92 bool allow_intrinsics) {
93 assert(callee != nullptr, "failed method resolution");
94
95 ciMethod* caller = jvms->method();
96 int bci = jvms->bci();
97 Bytecodes::Code bytecode = caller->java_code_at_bci(bci);
98 ciMethod* orig_callee = caller->get_method_at_bci(bci);
99
100 const bool is_virtual = (bytecode == Bytecodes::_invokevirtual) || (orig_callee->intrinsic_id() == vmIntrinsics::_linkToVirtual);
101 const bool is_interface = (bytecode == Bytecodes::_invokeinterface) || (orig_callee->intrinsic_id() == vmIntrinsics::_linkToInterface);
102 const bool is_virtual_or_interface = is_virtual || is_interface;
103
104 const bool check_access = !orig_callee->is_method_handle_intrinsic(); // method handle intrinsics don't perform access checks
105
106 // Dtrace currently doesn't work unless all calls are vanilla
107 if (env()->dtrace_method_probes()) {
108 allow_inline = false;
597 // Speculative type of the receiver if any
598 ciKlass* speculative_receiver_type = nullptr;
599 if (is_virtual_or_interface) {
600 Node* receiver_node = stack(sp() - nargs);
601 const TypeOopPtr* receiver_type = _gvn.type(receiver_node)->isa_oopptr();
602 // call_does_dispatch and vtable_index are out-parameters. They might be changed.
603 // For arrays, klass below is Object. When vtable calls are used,
604 // resolving the call with Object would allow an illegal call to
605 // finalize() on an array. We use holder instead: illegal calls to
606 // finalize() won't be compiled as vtable calls (IC call
607 // resolution will catch the illegal call) and the few legal calls
608 // on array types won't be either.
609 callee = C->optimize_virtual_call(method(), klass, holder, orig_callee,
610 receiver_type, is_virtual,
611 call_does_dispatch, vtable_index); // out-parameters
612 speculative_receiver_type = receiver_type != nullptr ? receiver_type->speculative_type() : nullptr;
613 }
614
615 // Additional receiver subtype checks for interface calls via invokespecial or invokeinterface.
616 ciKlass* receiver_constraint = nullptr;
617 if (iter().cur_bc_raw() == Bytecodes::_invokespecial && !orig_callee->is_object_initializer()) {
618 ciInstanceKlass* calling_klass = method()->holder();
619 ciInstanceKlass* sender_klass = calling_klass;
620 if (sender_klass->is_interface()) {
621 receiver_constraint = sender_klass;
622 }
623 } else if (iter().cur_bc_raw() == Bytecodes::_invokeinterface && orig_callee->is_private()) {
624 assert(holder->is_interface(), "How did we get a non-interface method here!");
625 receiver_constraint = holder;
626 }
627
628 if (receiver_constraint != nullptr) {
629 Node* receiver_node = stack(sp() - nargs);
630 Node* cls_node = makecon(TypeKlassPtr::make(receiver_constraint, Type::trust_interfaces));
631 Node* bad_type_ctrl = nullptr;
632 Node* casted_receiver = gen_checkcast(receiver_node, cls_node, &bad_type_ctrl);
633 if (bad_type_ctrl != nullptr) {
634 PreserveJVMState pjvms(this);
635 set_control(bad_type_ctrl);
636 uncommon_trap(Deoptimization::Reason_class_check,
637 Deoptimization::Action_none);
638 }
639 if (stopped()) {
640 return; // MUST uncommon-trap?
641 }
642 set_stack(sp() - nargs, casted_receiver);
643 }
644
645 // Note: It's OK to try to inline a virtual call.
646 // The call generator will not attempt to inline a polymorphic call
647 // unless it knows how to optimize the receiver dispatch.
648 bool try_inline = (C->do_inlining() || InlineAccessors);
649
650 // ---------------------
651 dec_sp(nargs); // Temporarily pop args for JVM state of call
652 JVMState* jvms = sync_jvms();
653
654 // ---------------------
655 // Decide call tactic.
656 // This call checks with CHA, the interpreter profile, intrinsics table, etc.
657 // It decides whether inlining is desirable or not.
658 CallGenerator* cg = C->call_generator(callee, vtable_index, call_does_dispatch, jvms, try_inline, prof_factor(), speculative_receiver_type);
659
660 // NOTE: Don't use orig_callee and callee after this point! Use cg->method() instead.
661 orig_callee = callee = nullptr;
662
663 // ---------------------
664
665 // Feed profiling data for arguments to the type system so it can
666 // propagate it as speculative types
667 record_profiled_arguments_for_speculation(cg->method(), bc());
668
669 #ifndef PRODUCT
670 // bump global counters for calls
671 count_compiled_calls(/*at_method_entry*/ false, cg->is_inline());
672
673 // Record first part of parsing work for this call
674 parse_histogram()->record_change();
675 #endif // not PRODUCT
676
677 assert(jvms == this->jvms(), "still operating on the right JVMS");
678 assert(jvms_in_sync(), "jvms must carry full info into CG");
725
726 assert(check_call_consistency(jvms, cg), "inconsistent info");
727
728 if (!stopped()) {
729 // This was some sort of virtual call, which did a null check for us.
730 // Now we can assert receiver-not-null, on the normal return path.
731 if (receiver != nullptr && cg->is_virtual()) {
732 Node* cast = cast_not_null(receiver);
733 // %%% assert(receiver == cast, "should already have cast the receiver");
734 }
735
736 ciType* rtype = cg->method()->return_type();
737 ciType* ctype = declared_signature->return_type();
738
739 if (Bytecodes::has_optional_appendix(iter().cur_bc_raw()) || is_signature_polymorphic) {
740 // Be careful here with return types.
741 if (ctype != rtype) {
742 BasicType rt = rtype->basic_type();
743 BasicType ct = ctype->basic_type();
744 if (ct == T_VOID) {
745 // It's OK for a method to return a value that is discarded.
746 // The discarding does not require any special action from the caller.
747 // The Java code knows this, at VerifyType.isNullConversion.
748 pop_node(rt); // whatever it was, pop it
749 } else if (rt == T_INT || is_subword_type(rt)) {
750 // Nothing. These cases are handled in lambda form bytecode.
751 assert(ct == T_INT || is_subword_type(ct), "must match: rt=%s, ct=%s", type2name(rt), type2name(ct));
752 } else if (is_reference_type(rt)) {
753 assert(is_reference_type(ct), "rt=%s, ct=%s", type2name(rt), type2name(ct));
754 if (ctype->is_loaded()) {
755 const TypeOopPtr* arg_type = TypeOopPtr::make_from_klass(rtype->as_klass());
756 const Type* sig_type = TypeOopPtr::make_from_klass(ctype->as_klass());
757 if (arg_type != nullptr && !arg_type->higher_equal(sig_type)) {
758 Node* retnode = pop();
759 Node* cast_obj = _gvn.transform(new CheckCastPPNode(control(), retnode, sig_type));
760 push(cast_obj);
761 }
762 }
763 } else {
764 assert(rt == ct, "unexpected mismatch: rt=%s, ct=%s", type2name(rt), type2name(ct));
765 // push a zero; it's better than getting an oop/int mismatch
783 // If the return type of the method is not loaded, assert that the
784 // value we got is a null. Otherwise, we need to recompile.
785 if (!rtype->is_loaded()) {
786 if (PrintOpto && (Verbose || WizardMode)) {
787 method()->print_name(); tty->print_cr(" asserting nullness of result at bci: %d", bci());
788 cg->method()->print_name(); tty->cr();
789 }
790 if (C->log() != nullptr) {
791 C->log()->elem("assert_null reason='return' klass='%d'",
792 C->log()->identify(rtype));
793 }
794 // If there is going to be a trap, put it at the next bytecode:
795 set_bci(iter().next_bci());
796 null_assert(peek());
797 set_bci(iter().cur_bci()); // put it back
798 }
799 BasicType ct = ctype->basic_type();
800 if (is_reference_type(ct)) {
801 record_profiled_return_for_speculation();
802 }
803 }
804
805 // Restart record of parsing work after possible inlining of call
806 #ifndef PRODUCT
807 parse_histogram()->set_initial_state(bc());
808 #endif
809 }
810
811 //---------------------------catch_call_exceptions-----------------------------
812 // Put a Catch and CatchProj nodes behind a just-created call.
813 // Send their caught exceptions to the proper handler.
814 // This may be used after a call to the rethrow VM stub,
815 // when it is needed to process unloaded exception classes.
816 void Parse::catch_call_exceptions(ciExceptionHandlerStream& handlers) {
817 // Exceptions are delivered through this channel:
818 Node* i_o = this->i_o();
819
820 // Add a CatchNode.
821 Arena tmp_mem{mtCompiler};
822 GrowableArray<int> bcis(&tmp_mem, 8, 0, -1);
|
1 /*
2 * Copyright (c) 1998, 2026, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "ci/ciCallSite.hpp"
26 #include "ci/ciMethodHandle.hpp"
27 #include "ci/ciSymbols.hpp"
28 #include "classfile/vmIntrinsics.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "compiler/compileBroker.hpp"
31 #include "compiler/compileLog.hpp"
32 #include "interpreter/linkResolver.hpp"
33 #include "jvm_io.h"
34 #include "logging/log.hpp"
35 #include "logging/logLevel.hpp"
36 #include "logging/logMessage.hpp"
37 #include "logging/logStream.hpp"
38 #include "opto/addnode.hpp"
39 #include "opto/callGenerator.hpp"
40 #include "opto/castnode.hpp"
41 #include "opto/cfgnode.hpp"
42 #include "opto/inlinetypenode.hpp"
43 #include "opto/mulnode.hpp"
44 #include "opto/parse.hpp"
45 #include "opto/rootnode.hpp"
46 #include "opto/runtime.hpp"
47 #include "opto/subnode.hpp"
48 #include "prims/methodHandles.hpp"
49 #include "runtime/sharedRuntime.hpp"
50 #include "utilities/macros.hpp"
51 #if INCLUDE_JFR
52 #include "jfr/jfr.hpp"
53 #endif
54
55 static void print_trace_type_profile(outputStream* out, int depth, ciKlass* prof_klass, int site_count, int receiver_count,
56 bool with_deco) {
57 if (with_deco) {
58 CompileTask::print_inline_indent(depth, out);
59 }
60 out->print(" \\-> TypeProfile (%d/%d counts) = ", receiver_count, site_count);
61 prof_klass->name()->print_symbol_on(out);
62 if (with_deco) {
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::_putBoolean:
103 case vmIntrinsicID::_putBooleanOpaque:
104 case vmIntrinsicID::_putBooleanRelease:
105 case vmIntrinsicID::_putBooleanVolatile:
106 case vmIntrinsicID::_putByte:
107 case vmIntrinsicID::_putByteOpaque:
108 case vmIntrinsicID::_putByteRelease:
109 case vmIntrinsicID::_putByteVolatile:
110 case vmIntrinsicID::_putChar:
111 case vmIntrinsicID::_putCharOpaque:
112 case vmIntrinsicID::_putCharRelease:
113 case vmIntrinsicID::_putCharUnaligned:
114 case vmIntrinsicID::_putCharVolatile:
115 case vmIntrinsicID::_putShort:
116 case vmIntrinsicID::_putShortOpaque:
117 case vmIntrinsicID::_putShortRelease:
118 case vmIntrinsicID::_putShortUnaligned:
119 case vmIntrinsicID::_putShortVolatile:
120 case vmIntrinsicID::_putInt:
121 case vmIntrinsicID::_putIntOpaque:
122 case vmIntrinsicID::_putIntRelease:
123 case vmIntrinsicID::_putIntUnaligned:
124 case vmIntrinsicID::_putIntVolatile:
125 case vmIntrinsicID::_putLong:
126 case vmIntrinsicID::_putLongOpaque:
127 case vmIntrinsicID::_putLongRelease:
128 case vmIntrinsicID::_putLongUnaligned:
129 case vmIntrinsicID::_putLongVolatile:
130 case vmIntrinsicID::_putFloat:
131 case vmIntrinsicID::_putFloatOpaque:
132 case vmIntrinsicID::_putFloatRelease:
133 case vmIntrinsicID::_putFloatVolatile:
134 case vmIntrinsicID::_putDouble:
135 case vmIntrinsicID::_putDoubleOpaque:
136 case vmIntrinsicID::_putDoubleRelease:
137 case vmIntrinsicID::_putDoubleVolatile:
138 case vmIntrinsicID::_putReference:
139 case vmIntrinsicID::_putReferenceOpaque:
140 case vmIntrinsicID::_putReferenceRelease:
141 case vmIntrinsicID::_putReferenceVolatile:
142 return true;
143 default:
144 return false;
145 }
146 }
147
148 CallGenerator* Compile::call_generator(ciMethod* callee, int vtable_index, bool call_does_dispatch,
149 JVMState* jvms, bool allow_inline,
150 float prof_factor, ciKlass* speculative_receiver_type,
151 bool allow_intrinsics) {
152 assert(callee != nullptr, "failed method resolution");
153
154 ciMethod* caller = jvms->method();
155 int bci = jvms->bci();
156 Bytecodes::Code bytecode = caller->java_code_at_bci(bci);
157 ciMethod* orig_callee = caller->get_method_at_bci(bci);
158
159 const bool is_virtual = (bytecode == Bytecodes::_invokevirtual) || (orig_callee->intrinsic_id() == vmIntrinsics::_linkToVirtual);
160 const bool is_interface = (bytecode == Bytecodes::_invokeinterface) || (orig_callee->intrinsic_id() == vmIntrinsics::_linkToInterface);
161 const bool is_virtual_or_interface = is_virtual || is_interface;
162
163 const bool check_access = !orig_callee->is_method_handle_intrinsic(); // method handle intrinsics don't perform access checks
164
165 // Dtrace currently doesn't work unless all calls are vanilla
166 if (env()->dtrace_method_probes()) {
167 allow_inline = false;
656 // Speculative type of the receiver if any
657 ciKlass* speculative_receiver_type = nullptr;
658 if (is_virtual_or_interface) {
659 Node* receiver_node = stack(sp() - nargs);
660 const TypeOopPtr* receiver_type = _gvn.type(receiver_node)->isa_oopptr();
661 // call_does_dispatch and vtable_index are out-parameters. They might be changed.
662 // For arrays, klass below is Object. When vtable calls are used,
663 // resolving the call with Object would allow an illegal call to
664 // finalize() on an array. We use holder instead: illegal calls to
665 // finalize() won't be compiled as vtable calls (IC call
666 // resolution will catch the illegal call) and the few legal calls
667 // on array types won't be either.
668 callee = C->optimize_virtual_call(method(), klass, holder, orig_callee,
669 receiver_type, is_virtual,
670 call_does_dispatch, vtable_index); // out-parameters
671 speculative_receiver_type = receiver_type != nullptr ? receiver_type->speculative_type() : nullptr;
672 }
673
674 // Additional receiver subtype checks for interface calls via invokespecial or invokeinterface.
675 ciKlass* receiver_constraint = nullptr;
676 if (iter().cur_bc_raw() == Bytecodes::_invokespecial && !orig_callee->is_object_constructor()) {
677 ciInstanceKlass* calling_klass = method()->holder();
678 ciInstanceKlass* sender_klass = calling_klass;
679 if (sender_klass->is_interface()) {
680 receiver_constraint = sender_klass;
681 }
682 } else if (iter().cur_bc_raw() == Bytecodes::_invokeinterface && orig_callee->is_private()) {
683 assert(holder->is_interface(), "How did we get a non-interface method here!");
684 receiver_constraint = holder;
685 }
686
687 if (receiver_constraint != nullptr) {
688 Node* receiver_node = stack(sp() - nargs);
689 Node* cls_node = makecon(TypeKlassPtr::make(receiver_constraint, Type::trust_interfaces));
690 Node* bad_type_ctrl = nullptr;
691 Node* casted_receiver = gen_checkcast(receiver_node, cls_node, &bad_type_ctrl);
692 if (bad_type_ctrl != nullptr) {
693 PreserveJVMState pjvms(this);
694 set_control(bad_type_ctrl);
695 uncommon_trap(Deoptimization::Reason_class_check,
696 Deoptimization::Action_none);
697 }
698 if (stopped()) {
699 return; // MUST uncommon-trap?
700 }
701 set_stack(sp() - nargs, casted_receiver);
702 }
703
704 // Scalarize value objects passed into this invocation if we know that they are not larval
705 for (int arg_idx = 0; arg_idx < nargs; arg_idx++) {
706 if (arg_can_be_larval(callee, arg_idx)) {
707 continue;
708 }
709
710 cast_to_non_larval(peek(nargs - 1 - arg_idx));
711 }
712
713 // Note: It's OK to try to inline a virtual call.
714 // The call generator will not attempt to inline a polymorphic call
715 // unless it knows how to optimize the receiver dispatch.
716 bool try_inline = (C->do_inlining() || InlineAccessors);
717
718 // ---------------------
719 dec_sp(nargs); // Temporarily pop args for JVM state of call
720 JVMState* jvms = sync_jvms();
721
722 // ---------------------
723 // Decide call tactic.
724 // This call checks with CHA, the interpreter profile, intrinsics table, etc.
725 // It decides whether inlining is desirable or not.
726 CallGenerator* cg = C->call_generator(callee, vtable_index, call_does_dispatch, jvms, try_inline, prof_factor(), speculative_receiver_type);
727 if (failing()) {
728 return;
729 }
730 assert(cg != nullptr, "must find a CallGenerator for callee %s", callee->name()->as_utf8());
731
732 // NOTE: Don't use orig_callee and callee after this point! Use cg->method() instead.
733 orig_callee = callee = nullptr;
734
735 // ---------------------
736
737 // Feed profiling data for arguments to the type system so it can
738 // propagate it as speculative types
739 record_profiled_arguments_for_speculation(cg->method(), bc());
740
741 #ifndef PRODUCT
742 // bump global counters for calls
743 count_compiled_calls(/*at_method_entry*/ false, cg->is_inline());
744
745 // Record first part of parsing work for this call
746 parse_histogram()->record_change();
747 #endif // not PRODUCT
748
749 assert(jvms == this->jvms(), "still operating on the right JVMS");
750 assert(jvms_in_sync(), "jvms must carry full info into CG");
797
798 assert(check_call_consistency(jvms, cg), "inconsistent info");
799
800 if (!stopped()) {
801 // This was some sort of virtual call, which did a null check for us.
802 // Now we can assert receiver-not-null, on the normal return path.
803 if (receiver != nullptr && cg->is_virtual()) {
804 Node* cast = cast_not_null(receiver);
805 // %%% assert(receiver == cast, "should already have cast the receiver");
806 }
807
808 ciType* rtype = cg->method()->return_type();
809 ciType* ctype = declared_signature->return_type();
810
811 if (Bytecodes::has_optional_appendix(iter().cur_bc_raw()) || is_signature_polymorphic) {
812 // Be careful here with return types.
813 if (ctype != rtype) {
814 BasicType rt = rtype->basic_type();
815 BasicType ct = ctype->basic_type();
816 if (ct == T_VOID) {
817 // It's OK for a method to return a value that is discarded.
818 // The discarding does not require any special action from the caller.
819 // The Java code knows this, at VerifyType.isNullConversion.
820 pop_node(rt); // whatever it was, pop it
821 } else if (rt == T_INT || is_subword_type(rt)) {
822 // Nothing. These cases are handled in lambda form bytecode.
823 assert(ct == T_INT || is_subword_type(ct), "must match: rt=%s, ct=%s", type2name(rt), type2name(ct));
824 } else if (is_reference_type(rt)) {
825 assert(is_reference_type(ct), "rt=%s, ct=%s", type2name(rt), type2name(ct));
826 if (ctype->is_loaded()) {
827 const TypeOopPtr* arg_type = TypeOopPtr::make_from_klass(rtype->as_klass());
828 const Type* sig_type = TypeOopPtr::make_from_klass(ctype->as_klass());
829 if (arg_type != nullptr && !arg_type->higher_equal(sig_type)) {
830 Node* retnode = pop();
831 Node* cast_obj = _gvn.transform(new CheckCastPPNode(control(), retnode, sig_type));
832 push(cast_obj);
833 }
834 }
835 } else {
836 assert(rt == ct, "unexpected mismatch: rt=%s, ct=%s", type2name(rt), type2name(ct));
837 // push a zero; it's better than getting an oop/int mismatch
855 // If the return type of the method is not loaded, assert that the
856 // value we got is a null. Otherwise, we need to recompile.
857 if (!rtype->is_loaded()) {
858 if (PrintOpto && (Verbose || WizardMode)) {
859 method()->print_name(); tty->print_cr(" asserting nullness of result at bci: %d", bci());
860 cg->method()->print_name(); tty->cr();
861 }
862 if (C->log() != nullptr) {
863 C->log()->elem("assert_null reason='return' klass='%d'",
864 C->log()->identify(rtype));
865 }
866 // If there is going to be a trap, put it at the next bytecode:
867 set_bci(iter().next_bci());
868 null_assert(peek());
869 set_bci(iter().cur_bci()); // put it back
870 }
871 BasicType ct = ctype->basic_type();
872 if (is_reference_type(ct)) {
873 record_profiled_return_for_speculation();
874 }
875
876 if (!rtype->is_void()) {
877 Node* retnode = peek();
878 const Type* rettype = gvn().type(retnode);
879 if (rettype->is_inlinetypeptr() && !retnode->is_InlineType()) {
880 retnode = InlineTypeNode::make_from_oop(this, retnode, rettype->inline_klass());
881 dec_sp(1);
882 push(retnode);
883 }
884 }
885
886 if (cg->method()->is_object_constructor() && receiver != nullptr && gvn().type(receiver)->is_inlinetypeptr()) {
887 InlineTypeNode* non_larval = InlineTypeNode::make_from_oop(this, receiver, gvn().type(receiver)->inline_klass());
888 // Relinquish the oop input, we will delay the allocation to the point it is needed, see the
889 // comments in InlineTypeNode::Ideal for more details
890 non_larval = non_larval->clone_if_required(&gvn(), nullptr);
891 non_larval->set_oop(gvn(), null());
892 non_larval->set_is_buffered(gvn(), false);
893 non_larval = gvn().transform(non_larval)->as_InlineType();
894 map()->replace_edge(receiver, non_larval);
895 }
896 }
897
898 // Restart record of parsing work after possible inlining of call
899 #ifndef PRODUCT
900 parse_histogram()->set_initial_state(bc());
901 #endif
902 }
903
904 //---------------------------catch_call_exceptions-----------------------------
905 // Put a Catch and CatchProj nodes behind a just-created call.
906 // Send their caught exceptions to the proper handler.
907 // This may be used after a call to the rethrow VM stub,
908 // when it is needed to process unloaded exception classes.
909 void Parse::catch_call_exceptions(ciExceptionHandlerStream& handlers) {
910 // Exceptions are delivered through this channel:
911 Node* i_o = this->i_o();
912
913 // Add a CatchNode.
914 Arena tmp_mem{mtCompiler};
915 GrowableArray<int> bcis(&tmp_mem, 8, 0, -1);
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