report_floating_nets: only report undriven nets with loads

Author: jjcherry56

src/resizer/src/Resizer.cc

@@ -2202,16 +2202,12 @@ Resizer::findFloatingNets()
   NetIterator *net_iter = network_->netIterator(network_->topInstance());
   while (net_iter->hasNext()) {
     Net *net = net_iter->next();
-    NetConnectedPinIterator *pin_iter = network_->connectedPinIterator(net);
-    int pin_count = 0;
-    while (pin_iter->hasNext()) {
-      pin_iter->next();
-      pin_count++;
-      if (pin_count > 1)
-	break;
-    }
-    delete pin_iter;
-    if (pin_count == 1)
+    PinSeq loads;
+    PinSeq drvrs;
+    PinSet visited_drvrs;
+    FindNetDrvrLoads visitor(nullptr, visited_drvrs, loads, drvrs, network_);
+    network_->visitConnectedPins(net, visitor);
+    if (drvrs.size() == 0 && loads.size() > 0)
       floating_nets->push_back(net);
   }
   delete net_iter;

src/resizer/test/gcd_resize.ok

@@ -17,22 +17,5 @@ Inserted 35 input buffers.
 Inserted 18 output buffers.
 Inserted 0 hold buffers.
 Resized 35 instances.
-Warning: found 16 floatiing nets.
- _424_
- _425_
- _426_
- _427_
- _428_
- _429_
- _430_
- _431_
- _432_
- _433_
- _434_
- _435_
- _436_
- _437_
- _438_
- _439_
 Design area 738 u^2 12% utilization.
 worst slack 9.35