predict.c (tree_estimate_probability_bb): Add LOCAL_ONLY.

	* predict.c (tree_estimate_probability_bb): Add LOCAL_ONLY.
	(tree_guess_outgoing_edge_probabilities): New.
	* predict.h (tree_guess_outgoing_edge_probabilities): Declare.
	* tree-cfg.c (gimple_find_sub_bbs): Propagate profile.

From-SVN: r248912

gcc/ChangeLog

 2017-06-06  Jan Hubicka  <hubicka@ucw.cz>
 
+	* predict.c (tree_estimate_probability_bb): Add LOCAL_ONLY.
+	(tree_guess_outgoing_edge_probabilities): New.
+	* predict.h (tree_guess_outgoing_edge_probabilities): Declare.
+	* tree-cfg.c (gimple_find_sub_bbs): Propagate profile.
+
+2017-06-06  Jan Hubicka  <hubicka@ucw.cz>
+
 	* ipa-split.c (split_function): Initialize return bb profile.
 
 2017-06-06  Jan Hubicka  <hubicka@ucw.cz>

gcc/predict.c

@@ -2665,10 +2665,11 @@ assert_is_empty (const_basic_block const &, edge_prediction *const &value,
   return false;
 }
 
-/* Predict branch probabilities and estimate profile for basic block BB.  */
+/* Predict branch probabilities and estimate profile for basic block BB.
+   When LOCAL_ONLY is set do not use any global properties of CFG.  */
 
 static void
-tree_estimate_probability_bb (basic_block bb)
+tree_estimate_probability_bb (basic_block bb, bool local_only)
 {
   edge e;
   edge_iterator ei;
@@ -2742,6 +2743,7 @@ tree_estimate_probability_bb (basic_block bb)
       /* Look for block we are guarding (ie we dominate it,
 	 but it doesn't postdominate us).  */
       if (e->dest != EXIT_BLOCK_PTR_FOR_FN (cfun) && e->dest != bb
+	  && !local_only
 	  && dominated_by_p (CDI_DOMINATORS, e->dest, e->src)
 	  && !dominated_by_p (CDI_POST_DOMINATORS, e->src, e->dest))
 	{
@@ -2800,7 +2802,7 @@ tree_estimate_probability (bool dry_run)
     predict_loops ();
 
   FOR_EACH_BB_FN (bb, cfun)
-    tree_estimate_probability_bb (bb);
+    tree_estimate_probability_bb (bb, false);
 
   FOR_EACH_BB_FN (bb, cfun)
     combine_predictions_for_bb (bb, dry_run);
@@ -2816,6 +2818,19 @@ tree_estimate_probability (bool dry_run)
   free_dominance_info (CDI_POST_DOMINATORS);
   remove_fake_exit_edges ();
 }
+
+/* Set edge->probability for each successor edge of BB.  */
+void
+tree_guess_outgoing_edge_probabilities (basic_block bb)
+{
+  bb_predictions = new hash_map<const_basic_block, edge_prediction *>;
+  tree_estimate_probability_bb (bb, true);
+  combine_predictions_for_bb (bb, false);
+  if (flag_checking)
+    bb_predictions->traverse<void *, assert_is_empty> (NULL);
+  delete bb_predictions;
+  bb_predictions = NULL;
+}
 
 /* Predict edges to successors of CUR whose sources are not postdominated by
    BB by PRED and recurse to all postdominators.  */

gcc/predict.h

@@ -83,6 +83,7 @@ extern void remove_predictions_associated_with_edge (edge);
 extern void predict_edge_def (edge, enum br_predictor, enum prediction);
 extern void invert_br_probabilities (rtx);
 extern void guess_outgoing_edge_probabilities (basic_block);
+extern void tree_guess_outgoing_edge_probabilities (basic_block);
 extern void tree_estimate_probability (bool);
 extern void handle_missing_profiles (void);
 extern bool counts_to_freqs (void);

gcc/tree-cfg.c

@@ -1048,10 +1048,27 @@ gimple_find_sub_bbs (gimple_seq seq, gimple_stmt_iterator *gsi)
   while (bb != afterbb)
     {
       struct omp_region *cur_region = NULL;
+      profile_count cnt = profile_count::zero ();
+      int freq = 0;
+
       int cur_omp_region_idx = 0;
       int mer = make_edges_bb (bb, &cur_region, &cur_omp_region_idx);
       gcc_assert (!mer && !cur_region);
       add_bb_to_loop (bb, afterbb->loop_father);
+
+      edge e;
+      edge_iterator ei;
+      FOR_EACH_EDGE (e, ei, bb->preds)
+	{
+	  cnt += e->count;
+	  freq += EDGE_FREQUENCY (e);
+	}
+      bb->count = cnt;
+      bb->frequency = freq;
+      tree_guess_outgoing_edge_probabilities (bb);
+      FOR_EACH_EDGE (e, ei, bb->succs)
+	e->count = bb->count.apply_probability (e->probability);
+
       bb = bb->next_bb;
     }
   return true;