bug in fence support fixed

diff --git a/action.cc b/action.cc
index 876de1262c82475f3f9e6610ba339f305963a0a5..d4c6253caf20c23411c60ba350a91760c386e6fc 100644 (file)
--- a/action.cc
+++ b/action.cc
@@ -330,7 +330,7 @@ bool ModelAction::could_synchronize_with(const ModelAction *act) const
                return false;
 
        // Different locations commute
-       if (!same_var(act))
+       if (!same_var(act) && !is_fence() && !act->is_fence())
                return false;
 
        // Explore interleavings of seqcst writes/fences to guarantee total