1161   const TypeKlassPtr* t2 = phase->type(in(2))->isa_klassptr();
1162   if (t2 == nullptr || !t2->klass_is_exact())
1163     return nullptr;
1164   // Get the constant klass we are comparing to.
1165   ciKlass* superklass = t2->exact_klass();
1166 
1167   // Now check for LoadKlass on left.
1168   Node* ldk1 = in(1);
1169   if (ldk1->is_DecodeNKlass()) {
1170     ldk1 = ldk1->in(1);
1171     if (ldk1->Opcode() != Op_LoadNKlass )
1172       return nullptr;
1173   } else if (ldk1->Opcode() != Op_LoadKlass )
1174     return nullptr;
1175   // Take apart the address of the LoadKlass:
1176   Node* adr1 = ldk1->in(MemNode::Address);
1177   intptr_t con2 = 0;
1178   Node* ldk2 = AddPNode::Ideal_base_and_offset(adr1, phase, con2);
1179   if (ldk2 == nullptr)
1180     return nullptr;
1181   if (con2 == oopDesc::klass_offset_in_bytes()) {
1182     // We are inspecting an object's concrete class.
1183     // Short-circuit the check if the query is abstract.
1184     if (superklass->is_interface() ||
1185         superklass->is_abstract()) {
1186       // Make it come out always false:
1187       this->set_req(2, phase->makecon(TypePtr::NULL_PTR));
1188       return this;
1189     }
1190   }
1191 
1192   // Check for a LoadKlass from primary supertype array.
1193   // Any nested loadklass from loadklass+con must be from the p.s. array.
1194   if (ldk2->is_DecodeNKlass()) {
1195     // Keep ldk2 as DecodeN since it could be used in CmpP below.
1196     if (ldk2->in(1)->Opcode() != Op_LoadNKlass )
1197       return nullptr;
1198   } else if (ldk2->Opcode() != Op_LoadKlass)
1199     return nullptr;
1200 
1201   // Verify that we understand the situation

1161   const TypeKlassPtr* t2 = phase->type(in(2))->isa_klassptr();
1162   if (t2 == nullptr || !t2->klass_is_exact())
1163     return nullptr;
1164   // Get the constant klass we are comparing to.
1165   ciKlass* superklass = t2->exact_klass();
1166 
1167   // Now check for LoadKlass on left.
1168   Node* ldk1 = in(1);
1169   if (ldk1->is_DecodeNKlass()) {
1170     ldk1 = ldk1->in(1);
1171     if (ldk1->Opcode() != Op_LoadNKlass )
1172       return nullptr;
1173   } else if (ldk1->Opcode() != Op_LoadKlass )
1174     return nullptr;
1175   // Take apart the address of the LoadKlass:
1176   Node* adr1 = ldk1->in(MemNode::Address);
1177   intptr_t con2 = 0;
1178   Node* ldk2 = AddPNode::Ideal_base_and_offset(adr1, phase, con2);
1179   if (ldk2 == nullptr)
1180     return nullptr;
1181   if (con2 == Type::klass_offset()) {
1182     // We are inspecting an object's concrete class.
1183     // Short-circuit the check if the query is abstract.
1184     if (superklass->is_interface() ||
1185         superklass->is_abstract()) {
1186       // Make it come out always false:
1187       this->set_req(2, phase->makecon(TypePtr::NULL_PTR));
1188       return this;
1189     }
1190   }
1191 
1192   // Check for a LoadKlass from primary supertype array.
1193   // Any nested loadklass from loadklass+con must be from the p.s. array.
1194   if (ldk2->is_DecodeNKlass()) {
1195     // Keep ldk2 as DecodeN since it could be used in CmpP below.
1196     if (ldk2->in(1)->Opcode() != Op_LoadNKlass )
1197       return nullptr;
1198   } else if (ldk2->Opcode() != Op_LoadKlass)
1199     return nullptr;
1200 
1201   // Verify that we understand the situation