add isl_union_pw_multi_aff_scale_multi_val

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

diff --git a/isl_local_space.c b/isl_local_space.c
index a8e5eba..4577cde 100644 (file)
--- a/isl_local_space.c
+++ b/isl_local_space.c
@@ -721,7 +721,6 @@ __isl_give isl_local_space *isl_local_space_substitute_equalities(
        unsigned total;
        unsigned n_div;
 
-       ls = isl_local_space_cow(ls);
        if (!ls || !eq)
                goto error;
 
@@ -739,6 +738,12 @@ __isl_give isl_local_space *isl_local_space_substitute_equalities(
                for (k = 0; k < ls->div->n_row; ++k) {
                        if (isl_int_is_zero(ls->div->row[k][1 + j]))
                                continue;
+                       ls = isl_local_space_cow(ls);
+                       if (!ls)
+                               goto error;
+                       ls->div = isl_mat_cow(ls->div);
+                       if (!ls->div)
+                               goto error;
                        isl_seq_elim(ls->div->row[k] + 1, eq->eq[i], j, total,
                                        &ls->div->row[k][0]);
                        normalize_div(ls, k);