[Bug c/106818] code is genereated differently with or without 'extern'

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106818

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Most likely known alignment or not.
Riscv targets are sensitive to alignment.