isl_basic_map_is_empty: remove stale sample

diff --git a/isl_map.c b/isl_map.c
index 77c133f..f7efcb7 100644 (file)
--- a/isl_map.c
+++ b/isl_map.c
@@ -3523,6 +3523,8 @@ int isl_basic_map_is_empty(struct isl_basic_map *bmap)
                if (contains)
                        return 0;
        }
+       isl_vec_free(bmap->sample);
+       bmap->sample = NULL;
        bset = isl_basic_map_underlying_set(isl_basic_map_copy(bmap));
        if (!bset)
                return -1;
@@ -3530,8 +3532,7 @@ int isl_basic_map_is_empty(struct isl_basic_map *bmap)
        if (!sample)
                return -1;
        empty = sample->size == 0;
-       if (bmap->sample)
-               isl_vec_free(bmap->sample);
+       isl_vec_free(bmap->sample);
        bmap->sample = sample;
        if (empty)
                ISL_F_SET(bmap, ISL_BASIC_MAP_EMPTY);