[vpr] add missing support on tileable routing

Author: tangxifan

vpr/src/route/route.cpp

@@ -42,6 +42,10 @@ bool route(const Netlist<>& net_list,
         graph_directionality = GRAPH_BIDIR;
     } else {
         graph_type = (det_routing_arch->directionality == BI_DIRECTIONAL ? GRAPH_BIDIR : GRAPH_UNIDIR);
+        /* Branch on tileable routing */
+        if (det_routing_arch->directionality == UNI_DIRECTIONAL && det_routing_arch->tileable) {
+            graph_type = GRAPH_UNIDIR_TILEABLE;
+        }
         graph_directionality = (det_routing_arch->directionality == BI_DIRECTIONAL ? GRAPH_BIDIR : GRAPH_UNIDIR);
     }