From: Bin Cheng <bin.cheng@arm.com>
Date: Fri, 17 Jun 2016 09:17:39 +0000 (+0000)
Subject: tree-vect-loop.c (vect_create_epilog_for_reduction): Only insert gimple seq if it... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=c7041a4fa37cc4e5b2334701f30a36690e6ddb5d;p=gcc.git

tree-vect-loop.c (vect_create_epilog_for_reduction): Only insert gimple seq if it's not empty.

	* tree-vect-loop.c (vect_create_epilog_for_reduction): Only
	insert gimple seq if it's not empty.

From-SVN: r237550
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d0699e2c397..aa2f101dcf1 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2016-06-17 Bin Cheng  <bin.cheng@arm.com>
+
+	* tree-vect-loop.c (vect_create_epilog_for_reduction): Only
+	insert gimple seq if it's not empty.
+
 2016-06-17  Bin Cheng  <bin.cheng@arm.com>
 
 	* tree-vectorizer.h (struct dr_with_seg_len): Remove class
diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c
index a2413bf9c67..6c0337bbbcb 100644
--- a/gcc/tree-vect-loop.c
+++ b/gcc/tree-vect-loop.c
@@ -4353,7 +4353,9 @@ vect_create_epilog_for_reduction (vec<tree> vect_defs, gimple *stmt,
       gimple_seq stmts;
       vec_init_def = force_gimple_operand (vec_initial_defs[i], &stmts,
 					   true, NULL_TREE);
-      gsi_insert_seq_on_edge_immediate (loop_preheader_edge (loop), stmts);
+      if (stmts)
+	gsi_insert_seq_on_edge_immediate (loop_preheader_edge (loop), stmts);
+
       def = vect_defs[i];
       for (j = 0; j < ncopies; j++)
         {