add isl_union_map_domain_product

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

diff --git a/isl_union_map.c b/isl_union_map.c
index b1d0096..646ac87 100644 (file)
--- a/isl_union_map.c
+++ b/isl_union_map.c
@@ -1193,6 +1193,31 @@ __isl_give isl_union_set *isl_union_set_product(__isl_take isl_union_set *uset1,
        return bin_op(uset1, uset2, &set_product_entry);
 }
 
+static int domain_product_entry(void **entry, void *user)
+{
+       struct isl_union_map_bin_data *data = user;
+       isl_map *map2 = *entry;
+
+       if (!isl_space_tuple_match(data->map->dim, isl_dim_out,
+                                map2->dim, isl_dim_out))
+               return 0;
+
+       map2 = isl_map_domain_product(isl_map_copy(data->map),
+                                    isl_map_copy(map2));
+
+       data->res = isl_union_map_add_map(data->res, map2);
+
+       return 0;
+}
+
+/* Given two maps A -> B and C -> D, construct a map [A -> C] -> (B * D)
+ */
+__isl_give isl_union_map *isl_union_map_domain_product(
+       __isl_take isl_union_map *umap1, __isl_take isl_union_map *umap2)
+{
+       return bin_op(umap1, umap2, &domain_product_entry);
+}
+
 static int range_product_entry(void **entry, void *user)
 {
        struct isl_union_map_bin_data *data = user;