More optimizations

• A lot of misc. optimization work, notably parallelization of Rodinia CPU schedules.
• Support >32 tiles in GPU backend.
• Tweak some transformations.

juno_samples/rodinia/bfs/src/bfs.jn

@@ -53,7 +53,7 @@ fn bfs<n, m: usize>(graph_nodes: Node[n], source: u32, edges: u32[m]) -> i32[n]
         mask[i] = true;
         visited[i] = true;
         updated[i] = false;
-	stop_prod.stop = updated[i];
+        stop_prod.stop = updated[i];
       }
     }
     stop = stop_prod.stop;