http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55551
--- Comment #9 from Teresa Johnson <tejohnson at google dot com> 2012-12-01 16:38:25 UTC --- On Sat, Dec 1, 2012 at 1:01 AM, markus at trippelsdorf dot de <gcc-bugzi...@gcc.gnu.org> wrote: > > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55551 > > --- Comment #8 from Markus Trippelsdorf <markus at trippelsdorf dot de> > 2012-12-01 09:01:33 UTC --- > (In reply to comment #5) >> >> Index: lto-cgraph.c >> =================================================================== >> --- lto-cgraph.c (revision 193999) >> +++ lto-cgraph.c (working copy) >> @@ -1345,7 +1345,8 @@ merge_profile_summaries (struct lto_file_decl_data >> /* Save a pointer to the profile_info with the largest >> scaled sum_all and the scale for use in merging the >> histogram. */ >> - if (lto_gcov_summary.sum_all > saved_sum_all) >> + if (!saved_profile_info >> + || lto_gcov_summary.sum_all > saved_sum_all) >> { >> saved_profile_info = &file_data->profile_info; >> saved_sum_all = lto_gcov_summary.sum_all; >> >> Can you try adding this patch and seeing if that fixes the issue? I >> will hold off on sending the first fix for review to see if I should >> add this one. > > Yes this fixes the issue. Firefox now builds fine. > Thanks. This is exactly what is happening. From gcov-dump on test.gcda: test.gcda: a3000000: 22:PROGRAM_SUMMARY checksum=0x01847361 test.gcda: counts=617, runs=5, sum_all=0, run_max=0, sum_max=0 test.gcda: counter histogram: test.gcda: 0: num counts=617, min counter=0, cum_counter=0 Not sure why there are no non-zero counters when there are >0 runs, but the above patch handles this situation. Will send in patch a little later today when bootstrap tests complete. Teresa > > -- > Configure bugmail: http://gcc.gnu.org/bugzilla/userprefs.cgi?tab=email > ------- You are receiving this mail because: ------- > You are on the CC list for the bug. -- Teresa Johnson | Software Engineer | tejohn...@google.com | 408-460-2413
