fix bugs in drivertools

kernel/drivertools.cc

@@ -680,9 +680,9 @@ void DriverMap::add(DriveBit const &a, DriveBit const &b)
 
 	// If either bit is just a wire that we don't need to keep, merge and
 	// use the other end as representative bit.
-	if (a_mode == BitMode::NONE)
+	if (a_mode == BitMode::NONE && !(b_mode == BitMode::DRIVEN_UNIQUE || b_mode == BitMode::DRIVEN))
 		connect_directed_merge(a_id, b_id);
-	else if (b_mode == BitMode::NONE)
+	else if (b_mode == BitMode::NONE && !(a_mode == BitMode::DRIVEN_UNIQUE || a_mode == BitMode::DRIVEN))
 		connect_directed_merge(b_id, a_id);
 	// If either bit requires a driven value and has a unique driver, merge
 	// and use the other end as representative bit.

passes/cmds/example_dt.cc

@@ -113,7 +113,7 @@ struct ExampleDtPass : public Pass
 								node.append_arg(enqueue(driver));
 							}
 						} else {
-							DriveChunkWire whole_wire(wire_chunk.wire, 0, wire_chunk.width);
+							DriveChunkWire whole_wire(wire_chunk.wire, 0, wire_chunk.wire->width);
 							node.set_function(ExampleFn(ID($$slice), {{ID(offset), wire_chunk.offset}, {ID(width), wire_chunk.width}}));
 							node.append_arg(enqueue(whole_wire));
 						}
@@ -145,7 +145,7 @@ struct ExampleDtPass : public Pass
 
 						} else {
 							DriveChunkPort whole_port(port_chunk.cell, port_chunk.port, 0, GetSize(port_chunk.cell->connections().at(port_chunk.port)));
-							node.set_function(ID($$buf));
+							node.set_function(ExampleFn(ID($$slice), {{ID(offset), port_chunk.offset}}));
 							node.append_arg(enqueue(whole_port));
 						}
 					} else if (chunk.is_constant()) {