[Bug target/53687] _mm_cmpistri generates redundant movslq %ecx, %rcx on x86-64

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53687

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2025-11-15
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
For zero_extend this should be matched too:

(set (reg:DI 123 [ _4 ])
    (zero_extend:DI (unspec:SI [
                (subreg:V16QI (reg:V2DI 116 [ _29 ]) 0)
                (subreg:V16QI (reg:V2DI 99 [ _3 ]) 0)
                (const_int 24 [0x18])
            ] UNSPEC_PCMPISTR)))