[Bug gcov-profile/55674] [4.8 Regression] >20% size increase of lto/pgo binaries since r193747

[markus at trippelsdorf dot de]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55674



--- Comment #2 from Markus Trippelsdorf <markus at trippelsdorf dot de> 
2012-12-13 14:46:31 UTC ---

In the tramp3d-v4 case, when I run with this simple debug patch:



diff --git a/gcc/predict.c b/gcc/predict.c

index 5d3de29..bf3a259 100644

--- a/gcc/predict.c

+++ b/gcc/predict.c

@@ -147,6 +147,7 @@ maybe_hot_count_p (struct function *fun, gcov_type count)

       gcc_assert (ws);

       min_count = ws->min_counter;

     }

+  fprintf (stderr, "count=%i min_count=%i profile_info->sum_max=%i\n", count,

min_count, profile_info->sum_max);

   return (count >= min_count);

 }



it shows that in the middle of the output, min_count changes from 

8585 to 0:



... ~600000 similar lines with  min_count=8585

count=3 min_count=8585 profile_info->sum_max=257406300

count=3 min_count=8585 profile_info->sum_max=257406300

count=3 min_count=8585 profile_info->sum_max=257406300

count=3 min_count=8585 profile_info->sum_max=257406300

count=40 min_count=0 profile_info->sum_max=257406300

count=61 min_count=0 profile_info->sum_max=257406300

count=40 min_count=0 profile_info->sum_max=257406300

count=40 min_count=0 profile_info->sum_max=257406300

... ~600000 similar lines with  min_count=0