[Bug middle-end/109907] Missed optimization for bit extraction (uses shift instead of single bit-test)

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109907

--- Comment #29 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #25)
> Created attachment 55175 [details]
> Patch which fixes `signed < 0`
> 
> This patch improves comment #20 .

I ran into a code generation regression with this patch on x86_64. I have a
patch to fix that but it might take sometime to submit both.