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.
