Cyphers/mkldnn (#2760)

* Revert "add logic in replace_node for provenance propagation (#2703)" (#2731)

This reverts commit 6c8284a3.

* Migrate doc changes to r0.18 (#2738)

* Migrate doc changes

* Add TensorFlow version change

* Use only convolution direct algo for non float convs (#2752)

src/ngraph/runtime/cpu/mkldnn_emitter.cpp

@@ -368,10 +368,9 @@ size_t
     conv_attr.set_int_output_round_mode(mkldnn::round_mode::round_nearest);
     /* Specify the scales array and corresponding mask */
     conv_attr.set_output_scales(0, output_scale);
-    mkldnn::algorithm convolution_algo = mkldnn_utils::get_conv_algo();
     size_t conv_index = insert_primitive(new mkldnn::convolution_forward(
         {{mkldnn::prop_kind::forward,
-          convolution_algo,
+          mkldnn::algorithm::convolution_direct,
           input_data_desc,
           weights_desc,
           result_desc,
@@ -417,10 +416,9 @@ size_t
     conv_attr.set_int_output_round_mode(mkldnn::round_mode::round_nearest);
     /* Specify the scales array and corresponding mask */
     conv_attr.set_output_scales(0, output_scale);
-    mkldnn::algorithm convolution_algo = mkldnn_utils::get_conv_algo();
     size_t conv_index = insert_primitive(new mkldnn::convolution_forward(
         {{mkldnn::prop_kind::forward,
-          convolution_algo,
+          mkldnn::algorithm::convolution_direct,
           input_data_desc,
           weights_desc,
           bias_desc,

src/ngraph/runtime/cpu/mkldnn_emitter.hpp

@@ -1255,6 +1255,13 @@ namespace ngraph
                     Strides window_dilation_strides_adjusted;
 
                     mkldnn::algorithm convolution_algo = mkldnn_utils::get_conv_algo();
+
+                    if (node->get_input_element_type(0) != element::f32 &&
+                        convolution_algo != mkldnn::algorithm::convolution_direct)
+                    {
+                        convolution_algo = mkldnn::algorithm::convolution_direct;
+                    }
+
                     for (size_t s : convolution->get_window_dilation_strides())
                     {
                         window_dilation_strides_adjusted.push_back(s - 1);

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

@@ -393,6 +393,13 @@ namespace ngraph
 
                     std::unique_ptr<convolution_forward::desc> fwd_desc{nullptr};
                     auto convolution_algo = mkldnn_utils::get_conv_algo();
+
+                    if (node->get_input_element_type(0) != element::f32 &&
+                        convolution_algo != mkldnn::algorithm::convolution_direct)
+                    {
+                        convolution_algo = mkldnn::algorithm::convolution_direct;
+                    }
+
                     if (use_bias)
                     {
                         memory::data_type et_bias =