Merge pull request #9023 from gadfort/pdn-no-swire

pdn: cleanup swires if no boxes created

Author: maliberty

src/pdn/src/PdnGen.cc

@@ -813,6 +813,15 @@ void PdnGen::writeToDb(bool add_pins, const std::string& report_file) const
     }
   }
 
+  // Remove empty swires
+  for (auto& [net, swire] : net_map) {
+    if (swire->getWires().empty()) {
+      odb::dbSWire::destroy(swire);
+      logger_->warn(
+          utl::PDN, 213, "No shapes were created for net {}.", net->getName());
+    }
+  }
+
   // remove stale results
   odb::dbMarkerCategory* category = block->findMarkerCategory("PDN");
   if (category != nullptr) {

src/pdn/test/BUILD

@@ -66,6 +66,7 @@ COMPULSORY_TESTS = [
     "core_grid_with_rings_with_straps",
     "core_grid_with_rings_with_straps_rings_over_core",
     "core_grid_with_routing_obstructions",
+    "core_grid_with_secondary_no_shapes",
     "core_grid_with_single_edge_pins",
     "core_grid_with_single_layer_rings",
     "design_width",

src/pdn/test/CMakeLists.txt

@@ -63,6 +63,7 @@ or_integration_tests(
     core_grid_with_rings_with_straps
     core_grid_with_rings_with_straps_rings_over_core
     core_grid_with_routing_obstructions
+    core_grid_with_secondary_no_shapes
     core_grid_with_single_edge_pins
     core_grid_with_single_layer_rings
     design_width