Test tools - small refactoring (#1471)

test/util/test_tools.hpp

@@ -96,13 +96,13 @@ size_t count_ops_of_type(std::shared_ptr<ngraph::Function> f)
 }
 
 template <typename T>
-std::vector<std::vector<T>> execute(std::shared_ptr<ngraph::Function> f,
+std::vector<std::vector<T>> execute(const std::shared_ptr<ngraph::Function>& function,
                                     std::vector<std::vector<T>> args,
-                                    std::string cbackend)
+                                    const std::string& backend_id)
 {
-    auto backend = ngraph::runtime::Backend::create(cbackend);
+    auto backend = ngraph::runtime::Backend::create(backend_id);
 
-    auto parms = f->get_parameters();
+    auto parms = function->get_parameters();
 
     if (parms.size() != args.size())
     {
@@ -117,7 +117,7 @@ std::vector<std::vector<T>> execute(std::shared_ptr<ngraph::Function> f,
         arg_tensors.at(i) = t;
     }
 
-    auto results = f->get_results();
+    auto results = function->get_results();
     std::vector<std::shared_ptr<ngraph::runtime::TensorView>> result_tensors(results.size());
 
     for (size_t i = 0; i < results.size(); i++)
@@ -126,7 +126,7 @@ std::vector<std::vector<T>> execute(std::shared_ptr<ngraph::Function> f,
             backend->create_tensor(results.at(i)->get_element_type(), results.at(i)->get_shape());
     }
 
-    backend->call_with_validate(f, result_tensors, arg_tensors);
+    backend->call_with_validate(function, result_tensors, arg_tensors);
 
     std::vector<std::vector<T>> result_vectors;
     for (auto rt : result_tensors)