From: Jan Hubicka <jh@suse.cz>
Date: Thu, 21 Apr 2016 08:52:41 +0000 (+0200)
Subject: tree-ssa-loop-unswitch.c (tree_unswitch_single_loop): Use also max_loop_iterations_int.
X-Git-Tag: basepoints/gcc-8~7514
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=f0305f3a5b2d64cc8143ad3a1aa8a704c10f91c7;p=thirdparty%2Fgcc.git

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
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 55d9708336bf..d24599f7dcc6 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+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
diff --git a/gcc/tree-ssa-loop-unswitch.c b/gcc/tree-ssa-loop-unswitch.c
index dd6fd01256a2..77acd66e9973 100644
--- a/gcc/tree-ssa-loop-unswitch.c
+++ b/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))