isl_basic_map_drop: properly handle nested spaces

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

diff --git a/isl_map_simplify.c b/isl_map_simplify.c
index 7a24c5b..c299aba 100644 (file)
--- a/isl_map_simplify.c
+++ b/isl_map_simplify.c
@@ -167,7 +167,7 @@ struct isl_basic_map *isl_basic_map_drop(struct isl_basic_map *bmap,
        dim = isl_basic_map_dim(bmap, type);
        isl_assert(bmap->ctx, first + n <= dim, goto error);
 
-       if (n == 0 && !isl_dim_get_tuple_name(bmap->dim, type))
+       if (n == 0 && !isl_dim_is_named_or_nested(bmap->dim, type))
                return bmap;
 
        bmap = isl_basic_map_cow(bmap);