[Bug c++/81906] [7/8 Regression] Calls to rint() wrongly optimized away starting in g++ 6

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81906

--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
https://gcc.gnu.org/wiki/FloatingPointMath