isl_basic_set_opt: avoid invalid access on error path

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

diff --git a/isl_band.c b/isl_band.c
index e381c60..e545a8a 100644 (file)
--- a/isl_band.c
+++ b/isl_band.c
@@ -1,7 +1,7 @@
 /*
  * Copyright 2011      INRIA Saclay
  *
- * Use of this software is governed by the GNU LGPLv2.1 license
+ * Use of this software is governed by the MIT license
  *
  * Written by Sven Verdoolaege, INRIA Saclay - Ile-de-France,
  * Parc Club Orsay Universite, ZAC des vignes, 4 rue Jacques Monod,
@@ -284,6 +284,44 @@ __isl_give isl_union_map *isl_band_get_suffix_schedule(
        return isl_union_map_from_union_pw_multi_aff(suffix);
 }
 
+/* Call "fn" on each band (recursively) in the list
+ * in depth-first post-order.
+ */
+int isl_band_list_foreach_band(__isl_keep isl_band_list *list,
+       int (*fn)(__isl_keep isl_band *band, void *user), void *user)
+{
+       int i, n;
+
+       if (!list)
+               return -1;
+
+       n = isl_band_list_n_band(list);
+       for (i = 0; i < n; ++i) {
+               isl_band *band;
+               int r = 0;
+
+               band = isl_band_list_get_band(list, i);
+               if (isl_band_has_children(band)) {
+                       isl_band_list *children;
+
+                       children = isl_band_get_children(band);
+                       r = isl_band_list_foreach_band(children, fn, user);
+                       isl_band_list_free(children);
+               }
+
+               if (!band)
+                       r = -1;
+               if (r == 0)
+                       r = fn(band, user);
+
+               isl_band_free(band);
+               if (r)
+                       return r;
+       }
+
+       return 0;
+}
+
 /* Internal data used during the construction of the schedule
  * for the tile loops.
  *
@@ -432,6 +470,7 @@ int isl_band_tile(__isl_keep isl_band *band, __isl_take isl_vec *sizes)
 
        child->children = band->children;
        band->children = list;
+       child->parent = band;
        isl_union_pw_multi_aff_free(band->pma);
        band->pma = sched;