--- gcc/gcc/predict.c	2017-07-18 22:21:16.000000000 +0200
+++ gcc-81318/gcc/predict.c	2017-07-23 06:41:36.000000000 +0200
@@ -3551,6 +3551,11 @@ estimate_bb_frequencies (bool force)
 	  edge_iterator ei;
 
+ 	  FOR_EACH_EDGE (e, ei, bb->succs)
+	    if (unlikely_executed_edge_p (e)
+		&& !e->probability.initialized_p ())
+	      e->probability = profile_probability::never ();
+
	  FOR_EACH_EDGE (e, ei, bb->succs)
 	    {
 	      EDGE_INFO (e)->back_edge_prob
 		 = e->probability.to_reg_br_prob_base ();