fix bootstrap due to unused variable warning

  * sese.c (invariant_in_sese_p_rec): Remove unused variable.

Co-Authored-By: Sebastian Pop <s.pop@samsung.com>

From-SVN: r228218

gcc/ChangeLog

 2015-09-28  Aditya Kumar  <aditya.k7@samsung.com>
             Sebastian Pop  <s.pop@samsung.com>
 
+	* sese.c (invariant_in_sese_p_rec): Remove unused variable.
+
+2015-09-28  Aditya Kumar  <aditya.k7@samsung.com>
+            Sebastian Pop  <s.pop@samsung.com>
+
 	* graphite-optimize-isl.c (optimize_isl): Use ISL_SCHEDULE_FUSE_MAX.
 	* graphite-scop-detection.c (struct sese_l): New type.
 	(get_entry_bb): API for getting entry bb of SESE.

gcc/sese.c

@@ -778,7 +778,7 @@ invariant_in_sese_p_rec (tree t, sese region)
     return false;
 
   /* VDEF is variant when it is in the region.  */
-  if (tree vdef = gimple_vdef (stmt))
+  if (gimple_vdef (stmt))
     return false;
 
   /* A VUSE may or may not be variant following the VDEFs.  */