make bias unnecessary for ConvRelu fuse

paddle/fluid/framework/ir/conv_relu_mkldnn_fuse_pass.cc

@@ -43,13 +43,12 @@ std::unique_ptr<ir::Graph> ConvReLUFusePass::ApplyImpl(
     VLOG(4) << "handle ConvReLU fuse";
     GET_IR_NODE_FROM_SUBGRAPH(conv_weight, conv_weight,
                               conv_relu_pattern);                      // Filter
-    GET_IR_NODE_FROM_SUBGRAPH(conv_bias, conv_bias, conv_relu_pattern);  // Bias
     GET_IR_NODE_FROM_SUBGRAPH(conv_out, conv_out, conv_relu_pattern);  // tmp
     GET_IR_NODE_FROM_SUBGRAPH(conv, conv, conv_relu_pattern);  // CONV op
     GET_IR_NODE_FROM_SUBGRAPH(relu_out, relu_out, conv_relu_pattern);  // Out
     GET_IR_NODE_FROM_SUBGRAPH(relu, relu, conv_relu_pattern);  // ReLU op
 
-    // Create an ConvReLU Node.
+    // Transform Conv node into ConvReLU node.
     OpDesc* desc = conv->Op();
     desc->SetOutput("Output", std::vector<std::string>({relu_out->Name()}));
     desc->SetAttr("fuse_relu", true);

paddle/fluid/framework/ir/graph_pattern_detector.cc

@@ -638,11 +638,6 @@ PDNode *patterns::ConvReLU::operator()(
                               ->AsInput()
                               ->assert_is_persistable_var()
                               ->assert_is_op_input("conv2d", "Filter");
-  // Bias
-  auto *conv_bias_var = pattern->NewNode(conv_bias_repr())
-                            ->AsInput()
-                            ->assert_is_persistable_var()
-                            ->assert_is_op_input("conv2d", "Bias");
   // intermediate variable, will be removed in the IR after fuse.
   auto *conv_out_var = pattern->NewNode(conv_out_repr())
                            ->AsIntermediate()
@@ -653,8 +648,7 @@ PDNode *patterns::ConvReLU::operator()(
                            ->AsOutput()
                            ->assert_is_op_output("relu");
 
-  conv_op->LinksFrom({conv_input, conv_weight_var, conv_bias_var})
-      .LinksTo({conv_out_var});
+  conv_op->LinksFrom({conv_input, conv_weight_var}).LinksTo({conv_out_var});
   relu_op->LinksFrom({conv_out_var}).LinksTo({relu_out_var});
   return relu_out_var;
 }

paddle/fluid/framework/ir/graph_pattern_detector.h

@@ -379,7 +379,7 @@ struct PatternBase {
 // op: conv + relu
 // named nodes:
 // conv_input, conv_weight,
-// conv_bias, conv_out, conv,
+// conv_out, conv,
 // relu_out, relu
 struct ConvReLU : public PatternBase {
   ConvReLU(PDPattern* pattern, const std::string& name_scope)
@@ -392,7 +392,6 @@ struct ConvReLU : public PatternBase {
   PATTERN_DECL_NODE(relu);
   // declare variable node's name
   PATTERN_DECL_NODE(conv_weight);
-  PATTERN_DECL_NODE(conv_bias);
   PATTERN_DECL_NODE(conv_out);
   PATTERN_DECL_NODE(relu_out);
 };