From: Sven Verdoolaege <skimo@kotnet.org>
Date: Fri, 25 Jun 2010 19:42:15 +0000 (+0200)
Subject: isl_basic_map_intersect_range: avoid NULL pointer dereference
X-Git-Tag: isl-0.03~42
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=85fd6a252d3ef762a09a78aa13e899f1d5147739;p=platform%2Fupstream%2Fisl.git

isl_basic_map_intersect_range: avoid NULL pointer dereference
---

diff --git a/isl_map.c b/isl_map.c
index b91a4a3..25f5500 100644
--- a/isl_map.c
+++ b/isl_map.c
@@ -1798,10 +1798,10 @@ struct isl_basic_map *isl_basic_map_intersect_range(
 		    isl_basic_map_compatible_range(bmap, bset), goto error);
 
 	bmap = isl_basic_map_cow(bmap);
-	bmap = isl_basic_map_extend_dim(bmap, isl_dim_copy(bmap->dim),
-			bset->n_div, bset->n_eq, bset->n_ineq);
 	if (!bmap)
 		goto error;
+	bmap = isl_basic_map_extend_dim(bmap, isl_dim_copy(bmap->dim),
+			bset->n_div, bset->n_eq, bset->n_ineq);
 	bmap_range = isl_basic_map_from_basic_set(bset, isl_dim_copy(bset->dim));
 	bmap = add_constraints(bmap, bmap_range, 0, 0);