diff options
Diffstat (limited to 'gcc-4.4.3/gcc/predict.c')
| -rw-r--r-- | gcc-4.4.3/gcc/predict.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/gcc-4.4.3/gcc/predict.c b/gcc-4.4.3/gcc/predict.c index e50a98707..4277e8525 100644 --- a/gcc-4.4.3/gcc/predict.c +++ b/gcc-4.4.3/gcc/predict.c @@ -172,11 +172,17 @@ cgraph_maybe_hot_edge_p (struct cgraph_edge *edge) { if (profile_info_available_p () && (edge->count - <= profile_info->sum_max / PARAM_VALUE (HOT_BB_COUNT_FRACTION)) - && !(flag_sample_profile && get_total_count_edge (edge, - cgraph_node_name (edge->caller->global.inlined_to ? - edge->caller->global.inlined_to : - edge->caller)) > 0)) + <= profile_info->sum_max / PARAM_VALUE (HOT_BB_COUNT_FRACTION))) + return false; + + /* For sample fdo, if the function doesn't have profile, it should be + cold. */ + if (flag_sample_profile && + edge->count == 0 && + get_total_count_edge (edge, + cgraph_node_name (edge->caller->global.inlined_to ? + edge->caller->global.inlined_to : + edge->caller)) == 0) return false; if (lookup_attribute ("cold", DECL_ATTRIBUTES (edge->callee->decl)) || lookup_attribute ("cold", DECL_ATTRIBUTES (edge->caller->decl))) @@ -2152,6 +2158,10 @@ compute_function_frequency (void) return; } cfun->function_frequency = FUNCTION_FREQUENCY_UNLIKELY_EXECUTED; + /* For sample profile, if the profile is not found, we can infer that + the function has not executed. */ + if (flag_sample_profile && profile_status != PROFILE_READ) + return; FOR_EACH_BB (bb) { if (maybe_hot_bb_p (bb)) |