MKLDNN conv + elementwise_add fusion: some refactoring: consts, function calls instead of constant values

paddle/fluid/framework/ir/conv_elementwise_add_mkldnn_fuse_pass.cc

@@ -47,23 +47,24 @@ struct Pattern : public PatternBase {
 };
 
 struct Conv {
-  std::string op_name() { return "conv2d"; }
-  std::string input_name() { return "Input"; }
-  std::string filter_name() { return "Filter"; }
-  std::string output_name() { return "Output"; }
+  std::string op_name() const { return "conv2d"; }
+  std::string input_name() const { return "Input"; }
+  std::string filter_name() const { return "Filter"; }
+  std::string residual_data_name() const { return "ResidualData"; }
+  std::string output_name() const { return "Output"; }
 
   std::function<PDNode*()> operator()(std::shared_ptr<Pattern> pattern) {
     return [&]() -> PDNode* {
-      auto conv_op = pattern->new_node(op_name())->assert_is_op("conv2d");
+      auto conv_op = pattern->new_node(op_name())->assert_is_op(op_name());
 
       auto input_var = pattern->new_node(input_name())
-                           ->assert_is_op_input(op_name(), input_name());
+                              ->assert_is_op_input(op_name(), input_name());
 
       auto filter_var = pattern->new_node(filter_name())
-                            ->assert_is_op_input(op_name(), filter_name());
+                               ->assert_is_op_input(op_name(), filter_name());
 
       auto output_var = pattern->new_node(output_name())
-                            ->assert_is_op_output(op_name(), output_name());
+                               ->assert_is_op_output(op_name(), output_name());
 
       conv_op->LinksFrom({input_var, filter_var});
       conv_op->LinksTo({output_var});
@@ -74,15 +75,15 @@ struct Conv {
 };
 
 struct ElementwiseAdd {
-  std::string op_name() { return "elementwise_add"; }
-  std::string x_name() { return "X"; }
-  std::string y_name() { return "Y"; }
-  std::string out_name() { return "Out"; }
+  std::string op_name() const { return "elementwise_add"; }
+  std::string x_name() const { return "X"; }
+  std::string y_name() const { return "Y"; }
+  std::string out_name() const { return "Out"; }
 
   std::function<PDNode*(PDNode*)> operator()(std::shared_ptr<Pattern> pattern) {
     return [&](PDNode* conv_output) -> PDNode* {
       auto elementwise_add_op =
-          pattern->new_node(op_name())->assert_is_op("elementwise_add");
+          pattern->new_node(op_name())->assert_is_op(op_name());
 
       auto x_var =
           pattern->new_node(x_name())->assert_is_op_input(op_name(), x_name());
@@ -90,8 +91,8 @@ struct ElementwiseAdd {
       conv_output->assert_is_op_input(op_name(), y_name());
 
       auto out_var = pattern->new_node(out_name())
-                         ->AsOutput()
-                         ->assert_is_op_output(op_name(), out_name());
+                            ->AsOutput()
+                            ->assert_is_op_output(op_name(), out_name());
 
       elementwise_add_op->LinksFrom({x_var, conv_output});
       elementwise_add_op->LinksTo({out_var});
@@ -177,15 +178,17 @@ graph_ptr ConvElementwiseAddMKLDNNFusePass::ApplyImpl(graph_ptr graph) const {
 
   conv_output->AsIntermediate();
 
-  auto fuse_conv = [](Graph* g, Node* conv_input, Node* conv_filter,
-                      Node* conv_output, Node* elementwise_add_x) {
+  auto fuse_conv = [&conv_pattern](Graph* g, Node* conv_input,
+                                   Node* conv_filter,
+                                   Node* conv_output,
+                                   Node* elementwise_add_x) {
     OpDesc op_desc;
-    op_desc.SetType("conv2d");
+    op_desc.SetType(conv_pattern.op_name());
 
-    op_desc.SetInput("Input", {conv_input->Name()});
-    op_desc.SetInput("Filter", {conv_filter->Name()});
-    op_desc.SetInput("ResidualData", {elementwise_add_x->Name()});
-    op_desc.SetOutput("Output", {conv_output->Name()});
+    op_desc.SetInput(conv_pattern.input_name(), {conv_input->Name()});
+    op_desc.SetInput(conv_pattern.filter_name(), {conv_filter->Name()});
+    op_desc.SetInput(conv_pattern.residual_data_name(), {elementwise_add_x->Name()});
+    op_desc.SetOutput(conv_pattern.output_name(), {conv_output->Name()});
 
     op_desc.SetAttr("use_mkldnn", true);
     op_desc.SetAttr("fuse_eltwise", true);
@@ -198,8 +201,8 @@ graph_ptr ConvElementwiseAddMKLDNNFusePass::ApplyImpl(graph_ptr graph) const {
     patterns::LinkNodes(fused_conv_op, conv_output);
   };
 
-  auto handler = [&](const GraphPatternDetector::subgraph_t& subgraph,
-                     Graph* g) {
+  auto handler = [&conv_pattern, &elementwise_add_pattern, pattern_ptr, fuse_conv]
+                 (const GraphPatternDetector::subgraph_t& subgraph, Graph* g) {
     auto conv_op = patterns::GetNodeFromSubgraph(subgraph, pattern_ptr,
                                                  conv_pattern.op_name());
     auto conv_input = patterns::GetNodeFromSubgraph(subgraph, pattern_ptr,