isl_basic_set_compute_vertices: set activity domain on single vertex

isl_basic_set_compute_vertices always sets the activity domains of
the vertices, except when there is only a single vertex.
Chnage vertices_0D to also set the activity domain in this case.

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

diff --git a/isl_vertices.c b/isl_vertices.c
index 5a4f8e3..77915fb 100644 (file)
--- a/isl_vertices.c
+++ b/isl_vertices.c
@@ -199,7 +199,8 @@ static __isl_give isl_vertices *vertices_0D(__isl_keep isl_basic_set *bset)
                goto error;
        vertices->n_vertices = 1;
        vertices->v[0].vertex = isl_basic_set_copy(bset);
-       if (!vertices->v[0].vertex)
+       vertices->v[0].dom = isl_basic_set_params(isl_basic_set_copy(bset));
+       if (!vertices->v[0].vertex || !vertices->v[0].dom)
                goto error;
 
        vertices->c = isl_calloc_array(bset->ctx, struct isl_chamber, 1);
@@ -210,7 +211,7 @@ static __isl_give isl_vertices *vertices_0D(__isl_keep isl_basic_set *bset)
        vertices->c[0].vertices = isl_calloc_array(bset->ctx, int, 1);
        if (!vertices->c[0].vertices)
                goto error;
-       vertices->c[0].dom = isl_basic_set_params(isl_basic_set_copy(bset));
+       vertices->c[0].dom = isl_basic_set_copy(vertices->v[0].dom);
        if (!vertices->c[0].dom)
                goto error;