[Bug rtl-optimization/67072] Slow code generated for getting each byte of a 64bit register as a LUT index.

[peter at cordes dot ca]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67072

--- Comment #3 from Peter Cordes <peter at cordes dot ca> ---
@Andrew Pinski: same code is generated with -march=sandybridge (-march=native
on Sandybridge).  (Except of course the intrinsics use the VEX version.)

-mtune=intel doesn't help either.