From c4b1b8653716b99be50dd5b7a77c201c117a5b1a Mon Sep 17 00:00:00 2001
From: amker <amker@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Wed, 5 Jul 2017 11:50:09 +0000
Subject: [PATCH] 	* tree-loop-distribution.c
 (pass_loop_distribution::execute): Skip 	if no loops.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@249984 138bc75d-0d04-0410-961f-82ee72b054a4
---
 gcc/ChangeLog                | 5 +++++
 gcc/tree-loop-distribution.c | 3 +++
 2 files changed, 8 insertions(+)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index fa8c40cacdd..666159bc8e9 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,10 @@
 2017-07-05  Bin Cheng  <bin.cheng@arm.com>
 
+	* tree-loop-distribution.c (pass_loop_distribution::execute): Skip
+	if no loops.
+
+2017-07-05  Bin Cheng  <bin.cheng@arm.com>
+
 	* cfgloop.h (struct loop): Add comment.  New field orig_loop_num.
 	* cfgloopmanip.c (lv_adjust_loop_entry_edge): Comment change.
 	* internal-fn.c (expand_LOOP_DIST_ALIAS): New function.
diff --git a/gcc/tree-loop-distribution.c b/gcc/tree-loop-distribution.c
index a60454b5218..9f0c801007c 100644
--- a/gcc/tree-loop-distribution.c
+++ b/gcc/tree-loop-distribution.c
@@ -1758,6 +1758,9 @@ pass_loop_distribution::execute (function *fun)
   control_dependences *cd = NULL;
   auto_vec<loop_p> loops_to_be_destroyed;
 
+  if (number_of_loops (fun) <= 1)
+    return 0;
+
   FOR_ALL_BB_FN (bb, fun)
     {
       gimple_stmt_iterator gsi;
-- 
2.11.4.GIT