[IE CLDNN] Memory dependencies fix

inference-engine/thirdparty/clDNN/src/graph_optimizer/oooq_memory_dependencies.cpp

@@ -92,15 +92,26 @@ void oooq_memory_dependencies::run(program_impl& p) {
     // every node has a bit array assigned to it
     // users or the node are marked with 1 bit in this array
     std::vector<bits_64> user_bitmap(num_nodes, bits_64(num_nodes));
+    std::vector<program_node*> suspect_nodes;
 
     // init bitmaps from direct node users
     for (const auto& node : user_map) {
         for (const auto& user : node.first->get_users()) {
             user_bitmap[node.second].set(user_map.at(user));
         }
+
+        size_t num_nodes = 0;
+        for (const auto& dep : node.first->get_dependencies()) {
+            if (!dep->is_constant()) {
+                ++num_nodes;
+            }
+        }
+        if (num_nodes > 1) {
+            suspect_nodes.emplace_back(node.first);
+        }
     }
 
-    // Iteratively extend the users set by adding closure over existing users untill no change occurs.
+    // Iteratively extend the users set by adding closure over existing users until no change occurs.
     bool changed = true;
     while (changed) {
         changed = false;
@@ -122,6 +133,29 @@ void oooq_memory_dependencies::run(program_impl& p) {
         return user_bitmap[A].is_set(B);
     };
 
+    for (auto node : suspect_nodes) {
+        std::vector<std::pair<program_node*, uint>> deps;
+        for (auto& dep : node->get_dependencies()) {
+            deps.emplace_back(dep, user_map.at(dep));
+        }
+
+        std::sort(deps.begin(), deps.end(), [&deps]
+                (std::pair<cldnn::program_node*, uint>& a, std::pair<cldnn::program_node*, uint>& b) {
+                    return a.second < b.second;
+                });
+
+        for (size_t i = 0; i < deps.size(); ++i) {
+            for (size_t j = i + 1; j < deps.size(); ++j) {
+                if (are_connected(deps[i].second, deps[j].second)) {
+                    for (const auto& user : deps[j].first->get_users()) {
+                        add_memory_dependency(deps[i].first, user);
+                        add_memory_dependency(user, deps[i].first);
+                    }
+                }
+            }
+        }
+    }
+
     unsigned int A = 0;
     auto itr_A = processing_order.begin();