[Bug target/55600] excessive size of vectorized code

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55600

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |x86_64-linux-gnu
           Keywords|                            |missed-optimization
          Component|tree-optimization           |target

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
So here is what the current state for this.
GCC vectorizers it and unroll it fully at 128 and 64
clang keeps it as **scalars** but unrolls the loop 4 times at 128 and fully at
64
ICC vectorizers it and unrolls it half way (that is 32 times) at 128 and fully
at 64
MSVC keeps it as **scalars** but unrolls it half way (that is 32 times) at 128

So it looks all compilers do stuff hugely different here really.