[Bug target/60826] inefficient code for vector xor on SSE2

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60826

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
   Target Milestone|---                         |6.0
         Resolution|---                         |FIXED

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Fixed fully in GCC 6+ in there is no extra move or going through memory.
In GCC 5, there is an extra move but no going through memory.

the RTL changed in GCC 7+ to use vec_select which fixes the problem without a
register allocation issue with tieing TI and DF modes.