[Bug gcov-profile/90364] 521.wrf_r is 9.5 % slower with PGO on Zen CPUs at -Ofast and native march/mtune

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90364

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2019-05-06
           Assignee|unassigned at gcc dot gnu.org      |marxin at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
> 
> 
> Note that calls to libmvec are gone with PGO.  However, they could
> only be generated because the system I used had the necessary Fortran
> include file, which IIUC the LNT worker did not have until last week
> and yet the regression can be seen in earlier data too.

I can confirm that. I'll take a look why the libvmec calls are not used with
PGO.