[Bug c/65493] bug with 64/32 division sign related to various factors (-O3)

[ml-gnubugzilla at worldspot dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65493

--- Comment #1 from sophana <ml-gnubugzilla at worldspot dot net> ---
Forgot to say that the result is the same on all tested gcc versions on various
targets. All work with -O1 and not with -O3