From 8137e465bfbb45b24ce597dcc1ed52e27ec6b316 Mon Sep 17 00:00:00 2001
From: Sebastian Pop <sebastian.pop@amd.com>
Date: Sat, 17 Jan 2009 15:13:12 +0000
Subject: [PATCH] graphite.c (graphite_trans_scop_block): Do not block single
 nested loops.

2009-01-17  Sebastian Pop  <sebastian.pop@amd.com>
	    Tobias Grosser  <tobi.grosser@amd.com>

	* graphite.c (graphite_trans_scop_block): Do not block single
	nested loops.


Co-Authored-By: Tobias Grosser <tobi.grosser@amd.com>

From-SVN: r143468
---
 gcc/ChangeLog  | 6 ++++++
 gcc/graphite.c | 2 +-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 77cf99cb6dd..5c356fc8c04 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2009-01-17  Sebastian Pop  <sebastian.pop@amd.com>
+	    Tobias Grosser  <tobi.grosser@amd.com>
+
+	* graphite.c (graphite_trans_scop_block): Do not block single
+	nested loops.
+
 2009-01-16  Alexandre Oliva  <aoliva@redhat.com>
 
 	* ebitmap.h (ebitmap_iter_init): Initialize all fields.
diff --git a/gcc/graphite.c b/gcc/graphite.c
index 4e301e47c54..5377d724b9b 100644
--- a/gcc/graphite.c
+++ b/gcc/graphite.c
@@ -5948,7 +5948,7 @@ graphite_trans_scop_block (scop_p scop)
   j++;
 
   /* Found perfect loop nest.  */
-  if (last_nb_loops - j > 0)
+  if (last_nb_loops - j >= 2)
     transform_done |= graphite_trans_loop_block (bbs, last_nb_loops - j);
   VEC_free (graphite_bb_p, heap, bbs);