re PR tree-optimization/83189 (internal compiler error: in probability_in, at profile-count.h:1050)

	PR middle-end/83189
	* gimple-ssa-isolate-paths.c (isolate_path): Fix profile update.

From-SVN: r256545

gcc/ChangeLog

 2018-01-11  Jan Hubicka  <hubicka@ucw.cz>
 
+	PR middle-end/83189
+	* gimple-ssa-isolate-paths.c (isolate_path): Fix profile update.
+
+2018-01-11  Jan Hubicka  <hubicka@ucw.cz>
+
 	PR middle-end/83718
 	* tree-inline.c (copy_cfg_body): Adjust num&den for scaling
 	after they are computed.

gcc/gimple-ssa-isolate-paths.c

@@ -138,6 +138,7 @@ isolate_path (basic_block bb, basic_block duplicate,
   edge_iterator ei;
   edge e2;
   bool impossible = true;
+  profile_count count = e->count ();
 
   for (si = gsi_start_bb (bb); gsi_stmt (si) != stmt; gsi_next (&si))
     if (stmt_can_terminate_bb_p (gsi_stmt (si)))
@@ -154,11 +155,12 @@ isolate_path (basic_block bb, basic_block duplicate,
   if (!duplicate)
     {
       duplicate = duplicate_block (bb, NULL, NULL);
-      bb->count = profile_count::zero ();
+      duplicate->count = profile_count::zero ();
       if (!ret_zero)
 	for (ei = ei_start (duplicate->succs); (e2 = ei_safe_edge (ei)); )
 	  remove_edge (e2);
     }
+  bb->count -= count;
 
   /* Complete the isolation step by redirecting E to reach DUPLICATE.  */
   e2 = redirect_edge_and_branch (e, duplicate);