action: update 'reads_from' field before synchronization

As the ModelChecker's release/acquire functionality gets more complex,
it makes more sense to assign the ModelAction::reads_from field before
checking synchronization. Currently, this makes no change in behavior.

diff --git a/action.cc b/action.cc
index 5c036ef1cf92e8376ffa7958b0c2b3660f3f3d27..b9e9c02c533a0eb9850c9a77a142cd9b549ce3db 100644 (file)
--- a/action.cc
+++ b/action.cc
@@ -165,10 +165,10 @@ void ModelAction::create_cv(const ModelAction *parent)
 void ModelAction::read_from(const ModelAction *act)
 {
        ASSERT(cv);
+       reads_from = act;
        if (act!=NULL && act->is_release() && this->is_acquire()) {
                synchronize_with(act);
        }
-       reads_from = act;
 }
 
 /**