diff options
Diffstat (limited to 'gcc/predict.cc')
| -rw-r--r-- | gcc/predict.cc | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/gcc/predict.cc b/gcc/predict.cc index 5639d81..895c5f9 100644 --- a/gcc/predict.cc +++ b/gcc/predict.cc @@ -852,7 +852,7 @@ unlikely_executed_stmt_p (gimple *stmt) heuristics. */ if (gimple_bb (stmt)->count.reliable_p () && gimple_bb (stmt)->count.nonzero_p ()) - return gimple_bb (stmt)->count == profile_count::zero (); + return false; /* NORETURN attribute alone is not strong enough: exit() may be quite likely executed once during program run. */ if (gimple_call_fntype (stmt) @@ -4521,6 +4521,9 @@ rebuild_frequencies (void) && (!uninitialized_count_found || uninitialized_probablity_found) && !cfun->cfg->count_max.very_large_p ()) { + /* Propagating zero counts should be safe and may + help hot/cold splitting. */ + determine_unlikely_bbs (); if (dump_file) fprintf (dump_file, "Profile is consistent\n"); return; @@ -4545,6 +4548,9 @@ rebuild_frequencies (void) for a given run, we would only propagate the error further. */ if (feedback_found && !uninitialized_count_found) { + /* Propagating zero counts should be safe and may + help hot/cold splitting. */ + determine_unlikely_bbs (); if (dump_file) fprintf (dump_file, "Profile is inconsistent but read from profile feedback;" |