[Bug middle-end/125767] can_div_away_from_zero_p incorrectly depends on can_div_trunc_p succeeding

[Chris.Bazley at arm dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125767

--- Comment #7 from Christopher Bazley <Chris.Bazley at arm dot com> ---
Please see https://forge.sourceware.org/gcc/gcc-TEST/pulls/176 for a proposed
fix