isl_map_plain_is_disjoint: fix error handling

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

diff --git a/isl_map_simplify.c b/isl_map_simplify.c
index 9cebefb..9001833 100644 (file)
--- a/isl_map_simplify.c
+++ b/isl_map_simplify.c
@@ -2170,12 +2170,14 @@ int isl_map_plain_is_disjoint(__isl_keep isl_map *map1,
        __isl_keep isl_map *map2)
 {
        int i, j;
+       int intersect;
 
        if (!map1 || !map2)
                return -1;
 
-       if (isl_map_plain_is_equal(map1, map2))
-               return 0;
+       intersect = isl_map_plain_is_equal(map1, map2);
+       if (intersect < 0 || intersect)
+               return intersect < 0 ? -1 : 0;
 
        for (i = 0; i < map1->n; ++i) {
                for (j = 0; j < map2->n; ++j) {