fix accu grads shape when enable opt shard

mindspore/ccsrc/frontend/parallel/step_parallel.cc

@@ -1852,19 +1852,25 @@ void SetClonedTensorShapeForOptimizer(const FuncGraphPtr &root) {
         MS_LOG(WARNING) << "The parameter " << param_name << " has not tensor layout, skip it";
         continue;
       }
-      cloned_parameter->set_user_data<TensorLayout>(cloned_from_parameter->user_data<TensorLayout>());
+      auto tensor_layout = cloned_from_parameter->user_data<TensorLayout>();
       MS_EXCEPTION_IF_NULL(cloned_parameter_node->abstract());
       MS_EXCEPTION_IF_NULL(cloned_from_node->abstract());
       auto cloned_abstract = cloned_parameter_node->abstract()->Clone();
       MS_EXCEPTION_IF_NULL(cloned_abstract);
+      // from pipeline or grad accumulation
       if (param_name.find(ACCU_GRADS) != std::string::npos) {
         auto slice_shape = cloned_from_parameter->user_data<TensorLayout>()->slice_shape().array();
         std::shared_ptr<abstract::BaseShape> parallel_shape = std::make_shared<abstract::Shape>(slice_shape);
         MS_EXCEPTION_IF_NULL(parallel_shape);
         cloned_abstract->set_shape(parallel_shape);
+        // in opt shard, accu_grad' shape  is different from the original param's shape
+        if (ParallelContext::GetInstance()->enable_parallel_optimizer()) {
+          tensor_layout->set_opt_shard_group("");
+        }
       } else {
         cloned_abstract->set_shape(cloned_from_node->abstract()->GetShapeTrack());
       }
+      cloned_parameter->set_user_data<TensorLayout>(tensor_layout);
       cloned_parameter_node->set_abstract(cloned_abstract);
       MS_LOG(INFO) << "The parameter: " << cloned_parameter->name()
                    << " is cloned, the be cloned parameter is: " << cloned_from_parameter->name()