[Bug target/87236] Using union to reinterpret from integer to floating point goes via memory

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87236

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
IIRC this is due to a tuning for generic and if you do -mcpu=Intel it won't go
via memory. Basically on some AMD hw the path via memory is faster than the
path between the sse and gprs.