[Bug rtl-optimization/91838] [8/9 Regression] incorrect use of shr and shrx to shift by 64, missed optimization of vector shift

[ubizjak at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91838

--- Comment #18 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Richard Biener from comment #17)
> Interestingly even with -mno-sse we somehow have a shift for V2QImode.
This is implemented by a combination of shl rl,cl and shl rh,cl, so no XMM
registers are needed.