1143 const TypeKlassPtr* t2 = phase->type(in(2))->isa_klassptr();
1144 if (t2 == nullptr || !t2->klass_is_exact())
1145 return nullptr;
1146 // Get the constant klass we are comparing to.
1147 ciKlass* superklass = t2->exact_klass();
1148
1149 // Now check for LoadKlass on left.
1150 Node* ldk1 = in(1);
1151 if (ldk1->is_DecodeNKlass()) {
1152 ldk1 = ldk1->in(1);
1153 if (ldk1->Opcode() != Op_LoadNKlass )
1154 return nullptr;
1155 } else if (ldk1->Opcode() != Op_LoadKlass )
1156 return nullptr;
1157 // Take apart the address of the LoadKlass:
1158 Node* adr1 = ldk1->in(MemNode::Address);
1159 intptr_t con2 = 0;
1160 Node* ldk2 = AddPNode::Ideal_base_and_offset(adr1, phase, con2);
1161 if (ldk2 == nullptr)
1162 return nullptr;
1163 if (con2 == oopDesc::klass_offset_in_bytes()) {
1164 // We are inspecting an object's concrete class.
1165 // Short-circuit the check if the query is abstract.
1166 if (superklass->is_interface() ||
1167 superklass->is_abstract()) {
1168 // Make it come out always false:
1169 this->set_req(2, phase->makecon(TypePtr::NULL_PTR));
1170 return this;
1171 }
1172 }
1173
1174 // Check for a LoadKlass from primary supertype array.
1175 // Any nested loadklass from loadklass+con must be from the p.s. array.
1176 if (ldk2->is_DecodeNKlass()) {
1177 // Keep ldk2 as DecodeN since it could be used in CmpP below.
1178 if (ldk2->in(1)->Opcode() != Op_LoadNKlass )
1179 return nullptr;
1180 } else if (ldk2->Opcode() != Op_LoadKlass)
1181 return nullptr;
1182
1183 // Verify that we understand the situation
|
1143 const TypeKlassPtr* t2 = phase->type(in(2))->isa_klassptr();
1144 if (t2 == nullptr || !t2->klass_is_exact())
1145 return nullptr;
1146 // Get the constant klass we are comparing to.
1147 ciKlass* superklass = t2->exact_klass();
1148
1149 // Now check for LoadKlass on left.
1150 Node* ldk1 = in(1);
1151 if (ldk1->is_DecodeNKlass()) {
1152 ldk1 = ldk1->in(1);
1153 if (ldk1->Opcode() != Op_LoadNKlass )
1154 return nullptr;
1155 } else if (ldk1->Opcode() != Op_LoadKlass )
1156 return nullptr;
1157 // Take apart the address of the LoadKlass:
1158 Node* adr1 = ldk1->in(MemNode::Address);
1159 intptr_t con2 = 0;
1160 Node* ldk2 = AddPNode::Ideal_base_and_offset(adr1, phase, con2);
1161 if (ldk2 == nullptr)
1162 return nullptr;
1163 if (con2 == Type::klass_offset()) {
1164 // We are inspecting an object's concrete class.
1165 // Short-circuit the check if the query is abstract.
1166 if (superklass->is_interface() ||
1167 superklass->is_abstract()) {
1168 // Make it come out always false:
1169 this->set_req(2, phase->makecon(TypePtr::NULL_PTR));
1170 return this;
1171 }
1172 }
1173
1174 // Check for a LoadKlass from primary supertype array.
1175 // Any nested loadklass from loadklass+con must be from the p.s. array.
1176 if (ldk2->is_DecodeNKlass()) {
1177 // Keep ldk2 as DecodeN since it could be used in CmpP below.
1178 if (ldk2->in(1)->Opcode() != Op_LoadNKlass )
1179 return nullptr;
1180 } else if (ldk2->Opcode() != Op_LoadKlass)
1181 return nullptr;
1182
1183 // Verify that we understand the situation
|