From: hubicka <hubicka@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon, 3 Jul 2017 12:43:19 +0000 (+0000)
Subject: 	* tree-cfg.c (gimple_find_sub_bbs): Fix profile updating.
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=8c3196e11dc5d2b2b14eb43b3a7c2eef3a508d0b;p=thirdparty%2Fgcc.git

	* tree-cfg.c (gimple_find_sub_bbs): Fix profile updating.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@249908 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 3d0826ae6c9e..dd4c44bf03bc 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2017-07-02  Jan Hubicka  <hubicka@ucw.cz>
+
+	* tree-cfg.c (gimple_find_sub_bbs): Fix profile updating.
+
 2017-07-02  Jan Hubicka  <hubicka@ucw.cz>
 
 	* tree-cfgcleanup.c (want_merge_blocks_p): New function.
diff --git a/gcc/tree-cfg.c b/gcc/tree-cfg.c
index e0cee12a69eb..248373194f5e 100644
--- a/gcc/tree-cfg.c
+++ b/gcc/tree-cfg.c
@@ -1051,6 +1051,7 @@ gimple_find_sub_bbs (gimple_seq seq, gimple_stmt_iterator *gsi)
       struct omp_region *cur_region = NULL;
       profile_count cnt = profile_count::zero ();
       int freq = 0;
+      bool all = true;
 
       int cur_omp_region_idx = 0;
       int mer = make_edges_bb (bb, &cur_region, &cur_omp_region_idx);
@@ -1061,12 +1062,16 @@ gimple_find_sub_bbs (gimple_seq seq, gimple_stmt_iterator *gsi)
       edge_iterator ei;
       FOR_EACH_EDGE (e, ei, bb->preds)
 	{
-	  cnt += e->count;
+	  if (e->count.initialized_p ())
+	    cnt += e->count;
+	  else
+	    all = false;
 	  freq += EDGE_FREQUENCY (e);
 	}
-      bb->count = cnt;
-      bb->frequency = freq;
       tree_guess_outgoing_edge_probabilities (bb);
+      if (all || profile_status_for_fn (cfun) == PROFILE_READ)
+        bb->count = cnt;
+      bb->frequency = freq;
       FOR_EACH_EDGE (e, ei, bb->succs)
 	e->count = bb->count.apply_probability (e->probability);