2157 // class need finalization.
2158 void Parse::call_register_finalizer() {
2159 Node* receiver = local(0);
2160 assert(receiver != nullptr && receiver->bottom_type()->isa_instptr() != nullptr,
2161 "must have non-null instance type");
2162
2163 const TypeInstPtr *tinst = receiver->bottom_type()->isa_instptr();
2164 if (tinst != nullptr && tinst->is_loaded() && !tinst->klass_is_exact()) {
2165 // The type isn't known exactly so see if CHA tells us anything.
2166 ciInstanceKlass* ik = tinst->instance_klass();
2167 if (!Dependencies::has_finalizable_subclass(ik)) {
2168 // No finalizable subclasses so skip the dynamic check.
2169 C->dependencies()->assert_has_no_finalizable_subclasses(ik);
2170 return;
2171 }
2172 }
2173
2174 // Insert a dynamic test for whether the instance needs
2175 // finalization. In general this will fold up since the concrete
2176 // class is often visible so the access flags are constant.
2177 Node* klass_addr = basic_plus_adr( receiver, receiver, oopDesc::klass_offset_in_bytes() );
2178 Node* klass = _gvn.transform(LoadKlassNode::make(_gvn, immutable_memory(), klass_addr, TypeInstPtr::KLASS));
2179
2180 Node* access_flags_addr = off_heap_plus_addr(klass, in_bytes(Klass::misc_flags_offset()));
2181 Node* access_flags = make_load(nullptr, access_flags_addr, TypeInt::UBYTE, T_BOOLEAN, MemNode::unordered);
2182
2183 Node* mask = _gvn.transform(new AndINode(access_flags, intcon(KlassFlags::_misc_has_finalizer)));
2184 Node* check = _gvn.transform(new CmpINode(mask, intcon(0)));
2185 Node* test = _gvn.transform(new BoolNode(check, BoolTest::ne));
2186
2187 IfNode* iff = create_and_map_if(control(), test, PROB_MAX, COUNT_UNKNOWN);
2188
2189 RegionNode* result_rgn = new RegionNode(3);
2190 record_for_igvn(result_rgn);
2191
2192 Node *skip_register = _gvn.transform(new IfFalseNode(iff));
2193 result_rgn->init_req(1, skip_register);
2194
2195 Node *needs_register = _gvn.transform(new IfTrueNode(iff));
2196 set_control(needs_register);
2197 if (stopped()) {
|
2157 // class need finalization.
2158 void Parse::call_register_finalizer() {
2159 Node* receiver = local(0);
2160 assert(receiver != nullptr && receiver->bottom_type()->isa_instptr() != nullptr,
2161 "must have non-null instance type");
2162
2163 const TypeInstPtr *tinst = receiver->bottom_type()->isa_instptr();
2164 if (tinst != nullptr && tinst->is_loaded() && !tinst->klass_is_exact()) {
2165 // The type isn't known exactly so see if CHA tells us anything.
2166 ciInstanceKlass* ik = tinst->instance_klass();
2167 if (!Dependencies::has_finalizable_subclass(ik)) {
2168 // No finalizable subclasses so skip the dynamic check.
2169 C->dependencies()->assert_has_no_finalizable_subclasses(ik);
2170 return;
2171 }
2172 }
2173
2174 // Insert a dynamic test for whether the instance needs
2175 // finalization. In general this will fold up since the concrete
2176 // class is often visible so the access flags are constant.
2177 Node* klass_addr = basic_plus_adr( receiver, receiver, Type::klass_offset() );
2178 Node* klass = _gvn.transform(LoadKlassNode::make(_gvn, immutable_memory(), klass_addr, TypeInstPtr::KLASS));
2179
2180 Node* access_flags_addr = off_heap_plus_addr(klass, in_bytes(Klass::misc_flags_offset()));
2181 Node* access_flags = make_load(nullptr, access_flags_addr, TypeInt::UBYTE, T_BOOLEAN, MemNode::unordered);
2182
2183 Node* mask = _gvn.transform(new AndINode(access_flags, intcon(KlassFlags::_misc_has_finalizer)));
2184 Node* check = _gvn.transform(new CmpINode(mask, intcon(0)));
2185 Node* test = _gvn.transform(new BoolNode(check, BoolTest::ne));
2186
2187 IfNode* iff = create_and_map_if(control(), test, PROB_MAX, COUNT_UNKNOWN);
2188
2189 RegionNode* result_rgn = new RegionNode(3);
2190 record_for_igvn(result_rgn);
2191
2192 Node *skip_register = _gvn.transform(new IfFalseNode(iff));
2193 result_rgn->init_req(1, skip_register);
2194
2195 Node *needs_register = _gvn.transform(new IfTrueNode(iff));
2196 set_control(needs_register);
2197 if (stopped()) {
|