isl_tab: improved error handling

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

diff --git a/isl_coalesce.c b/isl_coalesce.c
index a1b5f48..0716916 100644 (file)
--- a/isl_coalesce.c
+++ b/isl_coalesce.c
@@ -240,7 +240,8 @@ static int check_facets(struct isl_map *map, int i, int j,
                        if (stat != STATUS_VALID)
                                break;
                }
-               isl_tab_rollback(tabs[i], snap);
+               if (isl_tab_rollback(tabs[i], snap) < 0)
+                       return -1;
                if (l < map->p[j]->n_ineq)
                        break;
        }
@@ -390,7 +391,8 @@ static int check_adj_eq(struct isl_map *map, int i, int j,
        tabs[i] = isl_tab_select_facet(tabs[i], n_eq + k);
        super = contains(map, j, ineq_j, tabs[i]);
        if (super) {
-               isl_tab_rollback(tabs[i], snap2);
+               if (isl_tab_rollback(tabs[i], snap2) < 0)
+                       return -1;
                map->p[i] = isl_basic_map_cow(map->p[i]);
                if (!map->p[i])
                        return -1;
@@ -399,7 +401,8 @@ static int check_adj_eq(struct isl_map *map, int i, int j,
                drop(map, j, tabs);
                changed = 1;
        } else
-               isl_tab_rollback(tabs[i], snap);
+               if (isl_tab_rollback(tabs[i], snap) < 0)
+                       return -1;
 
        return changed;
 }