isl_printer_print_qpolynomial: properly print nested divs

[platform/upstream/isl.git] / isl_affine_hull.c

diff --git a/isl_affine_hull.c b/isl_affine_hull.c
index 894670b..cc4baf0 100644 (file)
--- a/isl_affine_hull.c
+++ b/isl_affine_hull.c
@@ -417,16 +417,19 @@ error:
 /* Drop all constraints in bset that involve any of the dimensions
  * first to first+n-1.
  */
-static struct isl_basic_set *drop_constraints_involving
-       (struct isl_basic_set *bset, unsigned first, unsigned n)
+__isl_give isl_basic_set *isl_basic_set_drop_constraints_involving(
+       __isl_take isl_basic_set *bset, unsigned first, unsigned n)
 {
        int i;
 
-       if (!bset)
-               return NULL;
+       if (n == 0)
+               return bset;
 
        bset = isl_basic_set_cow(bset);
 
+       if (!bset)
+               return NULL;
+
        for (i = bset->n_eq - 1; i >= 0; --i) {
                if (isl_seq_first_non_zero(bset->eq[i] + 1 + first, n) == -1)
                        continue;
@@ -703,7 +706,8 @@ static struct isl_basic_set *affine_hull_with_cone(struct isl_basic_set *bset,
        U = isl_mat_lin_to_aff(U);
        bset = isl_basic_set_preimage(bset, isl_mat_copy(U));
 
-       bset = drop_constraints_involving(bset, total - cone_dim, cone_dim);
+       bset = isl_basic_set_drop_constraints_involving(bset, total - cone_dim,
+                                                       cone_dim);
        bset = isl_basic_set_drop_dims(bset, total - cone_dim, cone_dim);
 
        Q = isl_mat_lin_to_aff(Q);