https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64676
--- Comment #5 from David Edelsohn <dje at gcc dot gnu.org> ---
This was caused by r219842
PR rtl-optimization/64081
* loop-iv.c (def_pred_latch_p): New function.
(latch_dominating_def): Allow specific cases with non-single
definitions.
(iv_get_reaching_def): Likewise.
(check_complex_exit_p): New function.
(check_simple_exit): Use check_complex_exit_p to allow certain cases
with exits not executing on any iteration.
