Seongbae Park ??? ??? wrote:
This is the intended behavior, though now I see that the documentation
isn't very clear.
Can you fix the documentation? As it stands now, it is easy for a user
to be misguided into thinking -fprofile-arcs and fbranch-probabilities
combination would work.
Just out of curiosity, What is the downside to letting people use
-fbranch-probabilities without -fprofile-use?
Cheers
Hari
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
<harihar...@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
