Fix run_passes semantics, but default to old transitive behavior (#1242)

src/ngraph/pass/manager.cpp

@@ -56,14 +56,20 @@ void ngraph::pass::Manager::initialize_default_passes()
 {
 }
 
-void ngraph::pass::Manager::run_passes(shared_ptr<Function> func)
+void ngraph::pass::Manager::run_passes(shared_ptr<Function> func, bool transitive)
 {
     bool profile_enabled = getenv("NGRAPH_PROFILE_PASS_ENABLE") != nullptr;
 
-    // find all functions
     vector<shared_ptr<Function>> fs;
+    if (transitive)
+    {
+        // find all functions
         traverse_functions(func, [&](shared_ptr<Function> f) { fs.push_back(f); });
-
+    }
+    else
+    {
+        fs = {func};
+    }
     set<shared_ptr<Function>> tfs(begin(fs), end(fs));
     get_state().set_functions(tfs);
 

src/ngraph/pass/manager.hpp

@@ -54,7 +54,7 @@ public:
         }
     }
 
-    void run_passes(std::shared_ptr<Function>);
+    void run_passes(std::shared_ptr<Function>, bool transitive = true);
 
     ManagerState& get_state();
     void set_pass_visualization(bool new_state) { m_visualize = new_state; }