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| author | Teresa Johnson <tejohnson@google.com> | 2012-11-23 08:49:43 +0000 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2012-11-23 08:49:43 +0000 |
| commit | b131b583978ceadbe54325be3a09710a48481df2 (patch) | |
| tree | c3a33c43f2e5098a3927078c4b315cd7408551cc /gcc/predict.c | |
| parent | 3409d40e47ed30f1b6dca3fa074c4094efbf5b50 (diff) | |
| download | gcc-b131b583978ceadbe54325be3a09710a48481df2.zip gcc-b131b583978ceadbe54325be3a09710a48481df2.tar.gz gcc-b131b583978ceadbe54325be3a09710a48481df2.tar.bz2 | |
predict.c (maybe_hot_count_p): Use threshold from profiled working set instead of hard limit.
* predict.c (maybe_hot_count_p): Use threshold from profiled working
set instead of hard limit.
(cgraph_maybe_hot_edge_p): Invoke maybe_hot_count_p() instead of
directly checking limit.
* params.def (HOT_BB_COUNT_FRACTION): Remove.
(HOT_BB_COUNT_WS_PERMILLE): New parameter.
* invoke.texi (hot-bb-count-fraction): Remove.
(hot-bb-count-ws-permille): Document.
Co-Authored-By: Jan Hubicka <jh@suse.cz>
From-SVN: r193747
Diffstat (limited to 'gcc/predict.c')
| -rw-r--r-- | gcc/predict.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/gcc/predict.c b/gcc/predict.c index aceca1d..5d3de29 100644 --- a/gcc/predict.c +++ b/gcc/predict.c @@ -134,13 +134,20 @@ maybe_hot_frequency_p (struct function *fun, int freq) static inline bool maybe_hot_count_p (struct function *fun, gcov_type count) { - if (profile_status_for_function (fun) != PROFILE_READ) + gcov_working_set_t *ws; + static gcov_type min_count = -1; + if (fun && profile_status_for_function (fun) != PROFILE_READ) return true; /* Code executed at most once is not hot. */ if (profile_info->runs >= count) return false; - return (count - > profile_info->sum_max / PARAM_VALUE (HOT_BB_COUNT_FRACTION)); + if (min_count == -1) + { + ws = find_working_set (PARAM_VALUE (HOT_BB_COUNT_WS_PERMILLE)); + gcc_assert (ws); + min_count = ws->min_counter; + } + return (count >= min_count); } /* Return true in case BB can be CPU intensive and should be optimized @@ -161,8 +168,8 @@ bool cgraph_maybe_hot_edge_p (struct cgraph_edge *edge) { if (profile_info && flag_branch_probabilities - && (edge->count - <= profile_info->sum_max / PARAM_VALUE (HOT_BB_COUNT_FRACTION))) + && !maybe_hot_count_p (NULL, + edge->count)) return false; if (edge->caller->frequency == NODE_FREQUENCY_UNLIKELY_EXECUTED || (edge->callee |