From: Sven Verdoolaege <skimo@kotnet.org>
Date: Tue, 28 May 2013 08:48:24 +0000 (+0200)
Subject: add isl_basic_map_plain_get_val_if_fixed
X-Git-Tag: isl-0.12~59
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ec29e23033d5225359010ddb6863724909a5b4da;p=platform%2Fupstream%2Fisl.git

add isl_basic_map_plain_get_val_if_fixed

Signed-off-by: Sven Verdoolaege <skimo@kotnet.org>
---

diff --git a/doc/user.pod b/doc/user.pod
index 6739879..d5814fd 100644
--- a/doc/user.pod
+++ b/doc/user.pod
@@ -2060,6 +2060,10 @@ is already known to be empty.
 Check if the relation obviously lies on a hyperplane where the given dimension
 has a fixed value and if so, return that value in C<*val>.
 
+	__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_give isl_val *isl_map_plain_get_val_if_fixed(
 		__isl_keep isl_map *map,
 		enum isl_dim_type type, unsigned pos);
diff --git a/include/isl/map.h b/include/isl/map.h
index b94d08e..0edc520 100644
--- a/include/isl/map.h
+++ b/include/isl/map.h
@@ -280,6 +280,9 @@ __isl_give isl_map *isl_map_drop_basic_map(__isl_take isl_map *map,
 
 int isl_basic_map_plain_is_fixed(__isl_keep isl_basic_map *bmap,
 	enum isl_dim_type type, unsigned pos, isl_int *val);
+__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);
 
 int isl_basic_map_image_is_bounded(__isl_keep isl_basic_map *bmap);
 int isl_basic_map_is_universe(__isl_keep isl_basic_map *bmap);
diff --git a/isl_map.c b/isl_map.c
index 5f55931..3505edf 100644
--- a/isl_map.c
+++ b/isl_map.c
@@ -8443,6 +8443,35 @@ 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)
 {