switch more passes to static_pointer_cast (#2041)

src/ngraph/runtime/cpu/pass/cpu_rnn_fusion.cpp

@@ -530,7 +530,7 @@ void ngraph::runtime::cpu::pass::RNNFusion::construct_rnn_lstm_fprop()
             // now get the GOE0 which is the first output of lstm (ht)
             for (auto& goes : lstm_nodes[index]->get_outputs().at(0).get_inputs())
             {
-                auto goe_node = std::dynamic_pointer_cast<op::GetOutputElement>(goes->get_node());
+                auto goe_node = std::static_pointer_cast<op::GetOutputElement>(goes->get_node());
                 // first output node of lstm
                 if (goe_node->get_n() == 0)
                 {

src/ngraph/runtime/cpu/pass/cpu_workspace_insertion.cpp

@@ -94,13 +94,13 @@ bool runtime::cpu::pass::CPUWorkspaceInsertion::run_on_function(std::shared_ptr<
 
 bool runtime::cpu::pass::CPUWorkspaceInsertion::transform(pattern::Matcher& m)
 {
-    auto data = std::dynamic_pointer_cast<pattern::op::Label>(m.get_pattern()->get_argument(0));
-    auto delta = std::dynamic_pointer_cast<pattern::op::Label>(m.get_pattern()->get_argument(1));
+    auto data = std::static_pointer_cast<pattern::op::Label>(m.get_pattern()->get_argument(0));
+    auto delta = std::static_pointer_cast<pattern::op::Label>(m.get_pattern()->get_argument(1));
     NGRAPH_DEBUG << "In a callback for construct_max_pool_with_indices against "
                  << m.get_match_root()->get_name();
 
     auto pattern_map = m.get_pattern_map();
-    auto m_max_pool_bprop = std::dynamic_pointer_cast<op::MaxPoolBackprop>(m.get_match_root());
+    auto m_max_pool_bprop = std::static_pointer_cast<op::MaxPoolBackprop>(m.get_match_root());
 
     if (m_max_pool_bprop->get_shape().size() != 4 ||
         m_max_pool_bprop->get_window_shape().size() != 2 ||