tree-ssa-loop-unswitch.c (tree_unswitch_single_loop): Use also max_loop_iterations_int.

	* tree-ssa-loop-unswitch.c (tree_unswitch_single_loop): Use also
	max_loop_iterations_int.
	(tree_unswitch_outer_loop): Likewise.

From-SVN: r235315

gcc/ChangeLog

+2016-04-18  Jan Hubicka  <jh@suse.cz>
+
+	* tree-ssa-loop-unswitch.c (tree_unswitch_single_loop): Use also
+	max_loop_iterations_int.
+	(tree_unswitch_outer_loop): Likewise.
+
 2016-04-20  Bin Cheng  <bin.cheng@arm.com>
 
 	PR tree-optimization/69489

gcc/tree-ssa-loop-unswitch.c

@@ -223,6 +223,8 @@ tree_unswitch_single_loop (struct loop *loop, int num)
       /* If the loop is not expected to iterate, there is no need
 	 for unswitching.  */
       iterations = estimated_loop_iterations_int (loop);
+      if (iterations < 0)
+        iterations = max_loop_iterations_int (loop);
       if (iterations >= 0 && iterations <= 1)
 	{
 	  if (dump_file && (dump_flags & TDF_DETAILS))
@@ -439,6 +441,8 @@ tree_unswitch_outer_loop (struct loop *loop)
   /* If the loop is not expected to iterate, there is no need
       for unswitching.  */
   iterations = estimated_loop_iterations_int (loop);
+  if (iterations < 0)
+    iterations = max_loop_iterations_int (loop);
   if (iterations >= 0 && iterations <= 1)
     {
       if (dump_file && (dump_flags & TDF_DETAILS))