[Bug tree-optimization/121338] UBSAN error in ivopts (signed integer overflow: 9223372036854775805 + 26 cannot be represented in type 'long int')

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121338

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
      int64_t niters = (int64_t) avg_loop_niter (data->current_loop);
      return (cost + (round_up_p ? niters - 1 : 0)) / niters;