bb-reorder.c (better_edge_p): Fix handling of uninitialized probability.

	* bb-reorder.c (better_edge_p): Fix handling of uninitialized
	probability.

From-SVN: r249966

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 27df4b8..5a1659d 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2017-07-04  Jan Hubicka  <hubicka@ucw.cz>
+
+       * bb-reorder.c (better_edge_p): Fix handling of uninitialized
+       probability.
+
 2017-07-04  Richard Sandiford  <richard.sandiford@linaro.org>
 
        PR tree-optimization/81292

diff --git a/gcc/bb-reorder.c b/gcc/bb-reorder.c
index ebd8b48..1994c1f 100644 (file)
--- a/gcc/bb-reorder.c
+++ b/gcc/bb-reorder.c
@@ -957,7 +957,7 @@ better_edge_p (const_basic_block bb, const_edge e, profile_probability prob,
     return !cur_best_edge
           || cur_best_edge->dest->index > e->dest->index;
 
-  if (prob > best_prob + diff_prob)
+  if (prob > best_prob + diff_prob || !best_prob.initialized_p ())
     /* The edge has higher probability than the temporary best edge.  */
     is_better_edge = true;
   else if (prob < best_prob - diff_prob)