[Bug rtl-optimization/67325] Optimize shift (aka subreg) of load to simple load

[glisse at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67325

--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
I am seeing the same code (well, with shrq) if I make the types unsigned.