Re: fbranch-probabilities bug

["Seongbae Park 박성배 朴成培" <seongbae dot park at gmail dot com>]

This is the intended behavior, though now I see that the documentation
isn't very clear.
You need to use -fprofile-use - the typical usage scenario is to
compile with -fprofile-generate
to build an executable to do profile collection, and then compile with
-fprofile-use
to build optimized code using the profile data.

Seongbae

On Thu, Jan 8, 2009 at 6:30 AM, Hariharan Sandanagobalane
<hariharans@picochip.com> wrote:
> Hi Seongbae,
> I was doing some work on profiling for picochip, when i noticed what looks
> to me like a bug. It looks to me that using fbranch-probabilities on the
> commandline (after a round of profile-generate or profile-arcs) would just
> not work on any target. Reason..
>
> Coverage.c:1011
>
>  if (flag_profile_use)
>    read_counts_file ();
>
> Should this not be
>
>  if (flag_profile_use || flag_branch_probabilities)  // Maybe more flags
>    read_counts_file ();
>
> ??
>
> Of course, i hit the problem later on since the counts were not read, it
> just assumed that the .gcda file were not available, when it actually was.
>
> Thanks
> Hari
>