more passes to static (#2027)

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

@@ -56,7 +56,7 @@ void ngraph::runtime::cpu::pass::CPUHorizontalFusion::cpu_conv_horizontal_fusion
         NGRAPH_DEBUG << "conv_horizontal_fusion: In a callback for conv horizontal fusion for "
                      << m.get_match_root()->get_name();
 
-        auto conv_bias_root = std::dynamic_pointer_cast<op::ConvolutionBias>(m.get_match_root());
+        auto conv_bias_root = std::static_pointer_cast<op::ConvolutionBias>(m.get_match_root());
 
         //check if the node has been replaced
         if (conv_bias_root->get_users().empty())

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

@@ -331,7 +331,7 @@ bool runtime::cpu::pass::CPURnnMatFusion::run_on_function(std::shared_ptr<Functi
             for (auto op : op_nodes)
             {
                 const auto old_slice =
-                    std::dynamic_pointer_cast<op::Slice>(op_seg_map[op].at(Type::DATA));
+                    std::static_pointer_cast<op::Slice>(op_seg_map[op].at(Type::DATA));
                 const auto& old_lower_bounds = old_slice->get_lower_bounds();
                 // lower bound matching the current time step
                 const Coordinate lower_bounds{old_lower_bounds[1], 0};
@@ -403,7 +403,7 @@ std::shared_ptr<Node> fuse_group_convolution(const std::shared_ptr<Node>& n)
     std::shared_ptr<Node> data;
     std::shared_ptr<Node> weights;
 
-    auto concat = std::dynamic_pointer_cast<op::Concat>(n);
+    auto concat = std::static_pointer_cast<op::Concat>(n);
     std::shared_ptr<op::Convolution> sconv;
 
     NodeVector slices;
@@ -423,14 +423,14 @@ std::shared_ptr<Node> fuse_group_convolution(const std::shared_ptr<Node>& n)
             return {nullptr};
         }
 
-        sconv = std::dynamic_pointer_cast<op::Convolution>(arg);
+        sconv = std::static_pointer_cast<op::Convolution>(arg);
 
         if (arg->get_input_shape(0).size() != 4)
         {
             NGRAPH_DEBUG << "convolution data's rank isn't equal to 4";
             return {nullptr};
         }
-        if (!is_trivial_convolution(std::dynamic_pointer_cast<op::Convolution>(arg)))
+        if (!is_trivial_convolution(sconv))
         {
             NGRAPH_DEBUG << arg->get_name() << " isn't trivial convolution";
             return {nullptr};