fusion the right branch first in dx+addn+drelu fusion

mindspore/ccsrc/backend/optimizer/ascend/buffer_fusion/conv2dbackprop_eltwise_eltwise_fusion_pass.cc

@@ -42,16 +42,28 @@ void Conv2DBackpropEltwiseEltwiseFusionPass::MatchConv2DBackpropInputEltwiseEltw
   }
   auto input_cnode = eltwise_input->cast<CNodePtr>();
   MS_EXCEPTION_IF_NULL(input_cnode);
-  auto double_in_eltwise_input = input_cnode->input(1);
+  auto double_in_eltwise_input = input_cnode->input(2);
   MS_EXCEPTION_IF_NULL(double_in_eltwise_input);
-  if (!double_in_eltwise_input->isa<CNode>() || !AnfAlgo::IsRealCNodeKernel(double_in_eltwise_input) ||
-      fusion_id_allocator->HasFusionIdAttr(double_in_eltwise_input)) {
+  if (!double_in_eltwise_input->isa<CNode>() || !AnfAlgo::IsRealCNodeKernel(double_in_eltwise_input)) {
     return;
   }
-  if (AnfAlgo::CheckPrimitiveType(double_in_eltwise_input, prim::kPrimConv2DBackpropInput)) {
+  if (AnfAlgo::CheckPrimitiveType(double_in_eltwise_input, prim::kPrimConv2DBackpropInput) &&
+      !fusion_id_allocator->HasFusionIdAttr(double_in_eltwise_input)) {
     (void)record.insert(double_in_eltwise_input);
     candidate_fusion->push_back(record);
     SetRecordFusionId(record);
+  } else {
+    auto double_in_eltwise_input_1 = input_cnode->input(1);
+    MS_EXCEPTION_IF_NULL(double_in_eltwise_input_1);
+    if (!double_in_eltwise_input_1->isa<CNode>() || !AnfAlgo::IsRealCNodeKernel(double_in_eltwise_input_1)) {
+      return;
+    }
+    if (AnfAlgo::CheckPrimitiveType(double_in_eltwise_input_1, prim::kPrimConv2DBackpropInput) &&
+        !fusion_id_allocator->HasFusionIdAttr(double_in_eltwise_input_1)) {
+      (void)record.insert(double_in_eltwise_input_1);
+      candidate_fusion->push_back(record);
+      SetRecordFusionId(record);
+    }
   }
 }