2103 // class need finalization.
2104 void Parse::call_register_finalizer() {
2105 Node* receiver = local(0);
2106 assert(receiver != nullptr && receiver->bottom_type()->isa_instptr() != nullptr,
2107 "must have non-null instance type");
2108
2109 const TypeInstPtr *tinst = receiver->bottom_type()->isa_instptr();
2110 if (tinst != nullptr && tinst->is_loaded() && !tinst->klass_is_exact()) {
2111 // The type isn't known exactly so see if CHA tells us anything.
2112 ciInstanceKlass* ik = tinst->instance_klass();
2113 if (!Dependencies::has_finalizable_subclass(ik)) {
2114 // No finalizable subclasses so skip the dynamic check.
2115 C->dependencies()->assert_has_no_finalizable_subclasses(ik);
2116 return;
2117 }
2118 }
2119
2120 // Insert a dynamic test for whether the instance needs
2121 // finalization. In general this will fold up since the concrete
2122 // class is often visible so the access flags are constant.
2123 Node* klass_addr = basic_plus_adr( receiver, receiver, oopDesc::klass_offset_in_bytes() );
2124 Node* klass = _gvn.transform(LoadKlassNode::make(_gvn, nullptr, immutable_memory(), klass_addr, TypeInstPtr::KLASS));
2125
2126 Node* access_flags_addr = basic_plus_adr(klass, klass, in_bytes(Klass::misc_flags_offset()));
2127 Node* access_flags = make_load(nullptr, access_flags_addr, TypeInt::UBYTE, T_BOOLEAN, MemNode::unordered);
2128
2129 Node* mask = _gvn.transform(new AndINode(access_flags, intcon(KlassFlags::_misc_has_finalizer)));
2130 Node* check = _gvn.transform(new CmpINode(mask, intcon(0)));
2131 Node* test = _gvn.transform(new BoolNode(check, BoolTest::ne));
2132
2133 IfNode* iff = create_and_map_if(control(), test, PROB_MAX, COUNT_UNKNOWN);
2134
2135 RegionNode* result_rgn = new RegionNode(3);
2136 record_for_igvn(result_rgn);
2137
2138 Node *skip_register = _gvn.transform(new IfFalseNode(iff));
2139 result_rgn->init_req(1, skip_register);
2140
2141 Node *needs_register = _gvn.transform(new IfTrueNode(iff));
2142 set_control(needs_register);
2143 if (stopped()) {
|
2103 // class need finalization.
2104 void Parse::call_register_finalizer() {
2105 Node* receiver = local(0);
2106 assert(receiver != nullptr && receiver->bottom_type()->isa_instptr() != nullptr,
2107 "must have non-null instance type");
2108
2109 const TypeInstPtr *tinst = receiver->bottom_type()->isa_instptr();
2110 if (tinst != nullptr && tinst->is_loaded() && !tinst->klass_is_exact()) {
2111 // The type isn't known exactly so see if CHA tells us anything.
2112 ciInstanceKlass* ik = tinst->instance_klass();
2113 if (!Dependencies::has_finalizable_subclass(ik)) {
2114 // No finalizable subclasses so skip the dynamic check.
2115 C->dependencies()->assert_has_no_finalizable_subclasses(ik);
2116 return;
2117 }
2118 }
2119
2120 // Insert a dynamic test for whether the instance needs
2121 // finalization. In general this will fold up since the concrete
2122 // class is often visible so the access flags are constant.
2123 Node* klass_addr = basic_plus_adr( receiver, receiver, Type::klass_offset() );
2124 Node* klass = _gvn.transform(LoadKlassNode::make(_gvn, nullptr, immutable_memory(), klass_addr, TypeInstPtr::KLASS));
2125
2126 Node* access_flags_addr = basic_plus_adr(klass, klass, in_bytes(Klass::misc_flags_offset()));
2127 Node* access_flags = make_load(nullptr, access_flags_addr, TypeInt::UBYTE, T_BOOLEAN, MemNode::unordered);
2128
2129 Node* mask = _gvn.transform(new AndINode(access_flags, intcon(KlassFlags::_misc_has_finalizer)));
2130 Node* check = _gvn.transform(new CmpINode(mask, intcon(0)));
2131 Node* test = _gvn.transform(new BoolNode(check, BoolTest::ne));
2132
2133 IfNode* iff = create_and_map_if(control(), test, PROB_MAX, COUNT_UNKNOWN);
2134
2135 RegionNode* result_rgn = new RegionNode(3);
2136 record_for_igvn(result_rgn);
2137
2138 Node *skip_register = _gvn.transform(new IfFalseNode(iff));
2139 result_rgn->init_req(1, skip_register);
2140
2141 Node *needs_register = _gvn.transform(new IfTrueNode(iff));
2142 set_control(needs_register);
2143 if (stopped()) {
|