[Bug target/88868] [SSE] pshufb can be omitted for a specific pattern

[glisse at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88868

Marc Glisse <glisse at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |x86_64-*-*
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2019-01-15
          Component|tree-optimization           |target
     Ever confirmed|0                           |1

--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
When the second argument is constant, I think we should turn _mm_shuffle_epi8
into a __builtin_shuffle.