Hierarchical writer from odb and test

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

src/dbSta/include/db_sta/dbNetwork.hh

@@ -179,6 +179,7 @@ class dbNetwork : public ConcreteNetwork
   dbBTerm* isTopPort(const Port*) const;
   void setTopPortDirection(dbBTerm* bterm, const dbIoType& io_type);
   ObjectId id(const Port* port) const override;
+  ObjectId id(const Cell* cell) const override;
 
   // hierarchical support functions
   dbModule* getNetDriverParentModule(Net* net);

src/dbSta/src/dbNetwork.cc

@@ -630,6 +630,29 @@ ObjectId dbNetwork::id(const Port* port) const
   return ConcreteNetwork::id(port);
 }
 
+// Note:
+// This api call is subtly used by the sta/verilog/VerilogWriter in sta.
+// The verilog writer in sta a hash of modules written out, cells.hasKey, which
+// uses the cell id as index and will land here (before it defaulted to the
+// concrete network api, which is ok for flat networks but wont work with
+// hierarchy).
+//
+
+ObjectId dbNetwork::id(const Cell* cell) const
+{
+  // in hierarchical flow we use the object id for the index
+  if (hierarchy_) {
+    if (!isConcreteCell(cell)) {
+      dbObject* obj = reinterpret_cast<dbObject*>(const_cast<Cell*>(cell));
+      dbObjectType type = obj->getObjectType();
+      return getDbNwkObjectId(type, obj->getId());
+    }
+  }
+  // default behaviour use the concrete cell.
+  const ConcreteCell* ccell = reinterpret_cast<const ConcreteCell*>(cell);
+  return ccell->id();
+}
+
 ////////////////////////////////////////////////////////////////
 
 ObjectId dbNetwork::id(const Instance* instance) const

src/dbSta/test/hierwrite.ok

@@ -0,0 +1,2 @@
+[INFO ODB-0227] LEF file: Nangate45/Nangate45.lef, created 22 layers, 27 vias, 135 library cells
+No differences found.

src/dbSta/test/hierwrite.tcl

@@ -0,0 +1,7 @@
+source "helpers.tcl"
+read_lef Nangate45/Nangate45.lef
+read_liberty Nangate45/Nangate45_typ.lib
+read_db hierwrite.odb -hier
+set v_file [make_result_file hierwrite.v]
+write_verilog $v_file
+diff_files $v_file hierwrite.vok