opt_expr: change info message

passes/opt/opt_expr.cc

@@ -515,7 +515,7 @@ void replace_const_cells(RTLIL::Design *design, RTLIL::Module *module, bool cons
 	if (!cells.sort()) {
 		// There might be a combinational loop, or there might be constants on the output of cells. 'check' may find out more.
 		// ...unless this is a coarse-grained cell loop, but not a bit loop, in which case it won't, and all is good.
-		log("Couldn't topologically sort cells, Yosys performance may be degraded.\nRunning 'check' is recommended.\n");
+		log("Couldn't topologically sort cells, optimizing module %s may take a longer time.\n", log_id(module));
 	}
 
 	for (auto cell : cells.sorted)