tree-vect-loop.c (vect_determine_vectorization_factor): Also compute the factor for live Phi nodes.

	* tree-vect-loop.c (vect_determine_vectorization_factor): Also compute
	the factor for live Phi nodes.

From-SVN: r236999

gcc/ChangeLog

+2016-06-01  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* tree-vect-loop.c (vect_determine_vectorization_factor): Also compute
+	the factor for live Phi nodes.
+
 2016-06-01  Jan Hubicka  <hubicka@ucw.cz>
 
 	* loop-dolop.c (doloop_optimize): Us likely max iteration bound.

gcc/tree-vect-loop.c

@@ -216,7 +216,8 @@ vect_determine_vectorization_factor (loop_vec_info loop_vinfo)
 
 	  gcc_assert (stmt_info);
 
-	  if (STMT_VINFO_RELEVANT_P (stmt_info))
+	  if (STMT_VINFO_RELEVANT_P (stmt_info)
+	      || STMT_VINFO_LIVE_P (stmt_info))
             {
 	      gcc_assert (!STMT_VINFO_VECTYPE (stmt_info));
               scalar_type = TREE_TYPE (PHI_RESULT (phi));