X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=isl_map.c;h=561f1c655d181a1cff23eed04d743fe4104ec58b;hb=19596bc4e5cd282b2e75d17077b1aaaeacbfd6f9;hp=5f55931bc2f345c4c757fc3d28e5f96d4bfa68d1;hpb=85df9e660b4ce2510d849facd3e08ff1aab4c6b4;p=platform%2Fupstream%2Fisl.git

diff --git a/isl_map.c b/isl_map.c
index 5f55931..561f1c6 100644
--- a/isl_map.c
+++ b/isl_map.c
@@ -2728,6 +2728,9 @@ int isl_basic_map_contains(struct isl_basic_map *bmap, struct isl_vec *vec)
 	unsigned total;
 	isl_int s;
 
+	if (!bmap || !vec)
+		return -1;
+
 	total = 1 + isl_basic_map_total_dim(bmap);
 	if (total != vec->size)
 		return -1;
@@ -3852,6 +3855,26 @@ error:
 	return NULL;
 }
 
+/* Given a map A -> f(A) and an integer d, construct a map
+ * A -> floor(f(A)/d).
+ */
+__isl_give isl_map *isl_map_floordiv_val(__isl_take isl_map *map,
+	__isl_take isl_val *d)
+{
+	if (!map || !d)
+		goto error;
+	if (!isl_val_is_int(d))
+		isl_die(isl_val_get_ctx(d), isl_error_invalid,
+			"expecting integer denominator", goto error);
+	map = isl_map_floordiv(map, d->n);
+	isl_val_free(d);
+	return map;
+error:
+	isl_map_free(map);
+	isl_val_free(d);
+	return NULL;
+}
+
 static struct isl_basic_map *var_equal(struct isl_basic_map *bmap, unsigned pos)
 {
 	int i;
@@ -8047,6 +8070,8 @@ struct isl_basic_map *isl_basic_map_align_divs(
 
 	src = isl_basic_map_order_divs(src);
 	dst = isl_basic_map_cow(dst);
+	if (!dst)
+		return NULL;
 	dst = isl_basic_map_extend_space(dst, isl_space_copy(dst->dim),
 			src->n_div, 0, 2 * src->n_div);
 	if (!dst)
@@ -8094,8 +8119,11 @@ struct isl_map *isl_map_align_divs(struct isl_map *map)
 
 	for (i = 1; i < map->n; ++i)
 		map->p[0] = isl_basic_map_align_divs(map->p[0], map->p[i]);
-	for (i = 1; i < map->n; ++i)
+	for (i = 1; i < map->n; ++i) {
 		map->p[i] = isl_basic_map_align_divs(map->p[i], map->p[0]);
+		if (!map->p[i])
+			return isl_map_free(map);
+	}
 
 	ISL_F_CLR(map, ISL_MAP_NORMALIZED);
 	return map;
@@ -8443,6 +8471,35 @@ int isl_basic_map_plain_is_fixed(__isl_keep isl_basic_map *bmap,
 		isl_basic_map_offset(bmap, type) - 1 + pos, val);
 }
 
+/* If "bmap" obviously lies on a hyperplane where the given dimension
+ * has a fixed value, then return that value.
+ * Otherwise return NaN.
+ */
+__isl_give isl_val *isl_basic_map_plain_get_val_if_fixed(
+	__isl_keep isl_basic_map *bmap,
+	enum isl_dim_type type, unsigned pos)
+{
+	isl_ctx *ctx;
+	isl_val *v;
+	int fixed;
+
+	if (!bmap)
+		return NULL;
+	ctx = isl_basic_map_get_ctx(bmap);
+	v = isl_val_alloc(ctx);
+	if (!v)
+		return NULL;
+	fixed = isl_basic_map_plain_is_fixed(bmap, type, pos, &v->n);
+	if (fixed < 0)
+		return isl_val_free(v);
+	if (fixed) {
+		isl_int_set_si(v->d, 1);
+		return v;
+	}
+	isl_val_free(v);
+	return isl_val_nan(ctx);
+}
+
 int isl_map_plain_is_fixed(__isl_keep isl_map *map,
 	enum isl_dim_type type, unsigned pos, isl_int *val)
 {
@@ -8480,6 +8537,16 @@ __isl_give isl_val *isl_map_plain_get_val_if_fixed(__isl_keep isl_map *map,
 	return isl_val_nan(ctx);
 }
 
+/* If "set" obviously lies on a hyperplane where the given dimension
+ * has a fixed value, then return that value.
+ * Otherwise return NaN.
+ */
+__isl_give isl_val *isl_set_plain_get_val_if_fixed(__isl_keep isl_set *set,
+	enum isl_dim_type type, unsigned pos)
+{
+	return isl_map_plain_get_val_if_fixed(set, type, pos);
+}
+
 int isl_set_plain_is_fixed(__isl_keep isl_set *set,
 	enum isl_dim_type type, unsigned pos, isl_int *val)
 {