Fix for scratchpad creation of buffers in resizer, mark such instance…

…s as concrete

Signed-off-by: andyfox-rushc <[email protected]>

src/dbSta/src/dbNetwork.cc

@@ -1993,6 +1993,20 @@ Instance* dbNetwork::makeInstance(LibertyCell* cell,
     dbMaster* master = db_->findMaster(cell_name);
     if (master) {
       dbInst* inst = dbInst::create(block_, master, name);
+      //
+      // Register all liberty cells as being concrete
+      // Sometimes this method is called by the sta
+      // to build "test circuits" eg to find the max wire length
+      // And those cells need to use the external api
+      // to get timing characteristics, so they have to be
+      // concrete
+      Cell* inst_cell = dbToSta(master);
+      registerConcreteCell(inst_cell);
+      std::unique_ptr<sta::CellPortIterator> port_iter{portIterator(inst_cell)};
+      while (port_iter->hasNext()) {
+        Port* cur_port = port_iter->next();
+        registerConcretePort(cur_port);
+      }
       return dbToSta(inst);
     }
   } else {
@@ -2003,6 +2017,20 @@ Instance* dbNetwork::makeInstance(LibertyCell* cell,
       dbMaster* master = db_->findMaster(cell_name);
       dbModule* parent = mod_inst->getMaster();
       dbInst* inst = dbInst::create(block_, master, name, false, parent);
+      Cell* inst_cell = dbToSta(master);
+      //
+      // Register all liberty cells as being concrete
+      // Sometimes this method is called by the sta
+      // to build "test circuits" eg to find the max wire length
+      // And those cells need to use the external api
+      // to get timing characteristics, so they have to be
+      // concrete
+      registerConcreteCell(inst_cell);
+      std::unique_ptr<sta::CellPortIterator> port_iter{portIterator(inst_cell)};
+      while (port_iter->hasNext()) {
+        Port* cur_port = port_iter->next();
+        registerConcretePort(cur_port);
+      }
       return dbToSta(inst);
     }
   }