AutoFDO profile toolchain is open-sourced

[Jan Hubicka]

> You can use dump_gcov to show a text version of the profile dump and
> check if the profile data makes sense. If your program is just a very
> tight single loop, the current implementation in trunk may not yield
> good results because it does not have discriminator support. Try the
> google-4_9 branch instead.

Can we possibly merge the remaining patches now when stage1 is open?

Honza
> 
> Dehao
> 
> >
> >
> > --
> > Best regards,
> > Ilya Palachev