isl_map_range: correctly handle maps with 0D domains

Internally, sets are represented as maps with unnamed, unstructured
0D domains.  isl_map_range takes advantage of this fact, but only
checked for 0D domains.  This was correct when isl_map_range was added,
but it should have been updated when named and structured spaces were
introduced.

Signed-off-by: Sven Verdoolaege <skimo@kotnet.org>

diff --git a/isl_map.c b/isl_map.c
index fbf95f7..334f383 100644 (file)
--- a/isl_map.c
+++ b/isl_map.c
@@ -3926,7 +3926,8 @@ struct isl_set *isl_map_range(struct isl_map *map)
 
        if (!map)
                goto error;
-       if (isl_map_dim(map, isl_dim_in) == 0)
+       if (isl_map_dim(map, isl_dim_in) == 0 &&
+           !isl_dim_is_named_or_nested(map->dim, isl_dim_in))
                return (isl_set *)map;
 
        map = isl_map_cow(map);