diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index dae5108fd13..a0c6c370564 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2016-10-24  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/78076
+	* tree-ssa-loop-split.c (tree_ssa_split_loops): Reset aux
+	also on the loop tree root.
+
 2016-10-24  Jakub Jelinek  <jakub@redhat.com>
 
 	* config/i386/i386.c (ix86_fold_builtin): Handle
diff --git a/gcc/tree-ssa-loop-split.c b/gcc/tree-ssa-loop-split.c
index 922817e63e4..53abb3616ca 100644
--- a/gcc/tree-ssa-loop-split.c
+++ b/gcc/tree-ssa-loop-split.c
@@ -592,7 +592,7 @@ tree_ssa_split_loops (void)
   bool changed = false;
 
   gcc_assert (scev_initialized_p ());
-  FOR_EACH_LOOP (loop, 0)
+  FOR_EACH_LOOP (loop, LI_INCLUDE_ROOT)
     loop->aux = NULL;
 
   /* Go through all loops starting from innermost.  */
@@ -631,7 +631,7 @@ tree_ssa_split_loops (void)
 	}
     }
 
-  FOR_EACH_LOOP (loop, 0)
+  FOR_EACH_LOOP (loop, LI_INCLUDE_ROOT)
     loop->aux = NULL;
 
   if (changed)