lto-cgraph.c (output_profile_summary, [...]): Use gcov streaming; stream hot bb threshold to ltrans.

	* lto-cgraph.c (output_profile_summary, input_profile_summary): Use
	gcov streaming; stream hot bb threshold to ltrans.
	* predict.c (get_hot_bb_threshold): Break out from ....
	(maybe_hot_count_p): ... here.
	(set_hot_bb_threshold): New function.
	* lto-section-in.c (lto_section_name): Add profile.
	* profile.h (get_hot_bb_threshold, set_hot_bb_threshold): Declare.
	* ipa.c: Include hash-table.h, tree-inline.h, profile.h, lto-streamer.h
	and data-streamer.h
	(histogram_entry): New structure.
	(histogram, histogram_pool): New global vars.
	(histogram_hash): New structure.
	(histogram_hash::hash): New method.
	(histogram_hash::equal): Likewise.
	(account_time_size): New function.
	(cmp_counts): New function.
	(dump_histogram): New function.
	(ipa_profile_generate_summary): New function.
	(ipa_profile_write_summary): New function.
	(ipa_profile_read_summary): New function.
	(ipa_profile): Decide on threshold.
	(pass_ipa_profile): Add ipa_profile_write_summary and ipa_profile_read_summary.
	* Makefile.in (ipa.o): Update dependencies.
	* lto-streamer.h (LTO_section_ipa_profile): New section.

From-SVN: r197243

1 files changed, 26 insertions, 9 deletions

diff --git a/gcc/predict.c b/gcc/predict.c
index 57975d1..5394ef5 100644
--- a/gcc/predict.c
+++ b/gcc/predict.c
@@ -128,25 +128,42 @@ maybe_hot_frequency_p (struct function *fun, int freq)
   return true;
 }
 
+static gcov_type min_count = -1;
+
+/* Determine the threshold for hot BB counts.  */
+
+gcov_type
+get_hot_bb_threshold ()
+{
+  gcov_working_set_t *ws;
+  if (min_count == -1)
+    {
+      ws = find_working_set (PARAM_VALUE (HOT_BB_COUNT_WS_PERMILLE));
+      gcc_assert (ws);
+      min_count = ws->min_counter;
+    }
+  return min_count;
+}
+
+/* Set the threshold for hot BB counts.  */
+
+void
+set_hot_bb_threshold (gcov_type min)
+{
+  min_count = min;
+}
+
 /* Return TRUE if frequency FREQ is considered to be hot.  */
 
 static inline bool
 maybe_hot_count_p (struct function *fun, gcov_type count)
 {
-  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;
-  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 (count >= get_hot_bb_threshold ());
 }
 
 /* Return true in case BB can be CPU intensive and should be optimized