[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 #26 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 .

Note this patch does not work for the case of normalizep == -1 but I have a fix
for that.