[Bug target/100973] gcc does not optimise based on knowing that `_mm256_movemask_ps` returns less than 255

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100973

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |x86_64-linux-gnu
           Keywords|                            |missed-optimization
   Last reconfirmed|                            |2021-06-08
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is a target/tree-optimization.  Basically Tree level optimization has no
idea what the builtin does and there is no target hook to querry the back-end
for ranges:
  _3 = __builtin_ia32_movmskps256D.2066 (values_2(D));