[Bug tree-optimization/89268] [9 Regression] r268689 caused FAIL: gcc.dg/vect/pr79887.c

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89268

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2019-02-09
                 CC|                            |jakub at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I think we want:
--- gcc/tree-if-conv.c.jj       2019-02-08 20:00:40.774827920 +0100
+++ gcc/tree-if-conv.c  2019-02-09 17:35:36.995782510 +0100
@@ -2760,7 +2760,8 @@ version_loop_for_if_conversion (struct l
   new_loop->force_vectorize = false;
   gsi = gsi_last_bb (cond_bb);
   gimple_call_set_arg (g, 1, build_int_cst (integer_type_node,
new_loop->num));
-  preds->safe_push (g);
+  if (preds)
+    preds->safe_push (g);
   gsi_insert_before (&gsi, g, GSI_SAME_STMT);
   update_ssa (TODO_update_ssa);
   return new_loop;
so that it behaves as before when called from tree-vect-loop.c (preds is NULL).