[Bug target/88013] can't vectorize rgb to grayscale conversion code

[ramana at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88013

Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2018-12-14
                 CC|                            |ramana at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #8 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---

>         vshr.u16        q9, q9, #8
>         vshr.u16        q8, q8, #8
>         vmovn.i16       d20, q9
>         vmovn.i16       d21, q8

Isn't that "just" a missing combine pattern to get us vshrn in both backends ? 

Ramana