[Bug other/87036] -O1/-O2 affects floating point precision on at least i686 and ppc64el

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87036

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
For powerpc at least this is due to fma. Use -ffp-contract=off to turn it off.