diff options
Diffstat (limited to 'gcc/auto-profile.cc')
| -rw-r--r-- | gcc/auto-profile.cc | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/gcc/auto-profile.cc b/gcc/auto-profile.cc index 215dadf..e12b304 100644 --- a/gcc/auto-profile.cc +++ b/gcc/auto-profile.cc @@ -575,10 +575,10 @@ void function_instance::merge (function_instance *other) for (callsite_map::const_iterator iter = other->callsites.begin (); iter != other->callsites.end (); ++iter) if (callsites.count (iter->first) == 0) - callsites[iter->first] = iter->second; + callsites[iter->first] = iter->second; - for (position_count_map::const_iterator iter = pos_counts.begin (); - iter != pos_counts.end (); ++iter) + for (position_count_map::const_iterator iter = other->pos_counts.begin (); + iter != other->pos_counts.end (); ++iter) if (pos_counts.count (iter->first) == 0) pos_counts[iter->first] = iter->second; else @@ -1120,7 +1120,8 @@ update_count_by_afdo_count (profile_count *count, gcov_type c) /* In case we have guessed profile which is already zero, preserve quality info. */ else if (count->nonzero_p () - || count->quality () == GUESSED) + || count->quality () == GUESSED + || count->quality () == GUESSED_LOCAL) *count = profile_count::zero ().afdo (); } @@ -1515,8 +1516,21 @@ afdo_calculate_branch_prob (bb_set *annotated_bb) if (num_unknown_succ == 0 && total_count.nonzero_p ()) { FOR_EACH_EDGE (e, ei, bb->succs) - e->probability - = AFDO_EINFO (e)->get_count ().probability_in (total_count); + { + /* If probability is 1, preserve reliable static prediction + (This is, for example the case of single fallthru edge + or single fallthru plus unlikely EH edge.) */ + if (AFDO_EINFO (e)->get_count () == total_count + && e->probability == profile_probability::always ()) + ; + else if (AFDO_EINFO (e)->get_count ().nonzero_p ()) + e->probability + = AFDO_EINFO (e)->get_count ().probability_in (total_count); + /* If probability is zero, preserve reliable static prediction. */ + else if (e->probability.nonzero_p () + || e->probability.quality () == GUESSED) + e->probability = profile_probability::never ().afdo (); + } } } FOR_ALL_BB_FN (bb, cfun) |