From 10c2b6f6380721f20454bb0f1ed79966729beff4 Mon Sep 17 00:00:00 2001
From: Sven Verdoolaege <skimo@kotnet.org>
Date: Fri, 5 Jul 2013 17:02:03 +0200
Subject: [PATCH] isl_aff_align_divs: accept NULL pointer on zero-size
 allocation

Signed-off-by: Sven Verdoolaege <skimo@kotnet.org>
---
 isl_aff.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/isl_aff.c b/isl_aff.c
index 8d8d6f51..84d264b9 100644
--- a/isl_aff.c
+++ b/isl_aff.c
@@ -4675,7 +4675,7 @@ __isl_give isl_aff *isl_aff_align_divs(__isl_take isl_aff *dst,
 
 	exp1 = isl_alloc_array(ctx, int, src->ls->div->n_row);
 	exp2 = isl_alloc_array(ctx, int, dst->ls->div->n_row);
-	if (!exp1 || !exp2)
+	if (!exp1 || (dst->ls->div->n_row && !exp2))
 		goto error;
 
 	div = isl_merge_divs(src->ls->div, dst->ls->div, exp1, exp2);
-- 
2.11.4.GIT