/**
 * Copyright 2020 Huawei Technologies Co., Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#include "pre_activate/pass/remove_nop_nodes.h"

#include "common/utils.h"
#include "pre_activate/common/helper.h"

namespace mindspore {
namespace opt {
const AnfNodePtr RemoveNopNodes::Process(const FuncGraphPtr &, const AnfNodePtr &node, const EquivPtr &) const {
  if (node == nullptr || !node->isa<CNode>()) {
    return nullptr;
  }
  CNodePtr cnode = node->cast<CNodePtr>();
  MS_EXCEPTION_IF_NULL(cnode);
  if (!IsNopNode(node)) {
    return nullptr;
  }
  return cnode->input(1);
}
}  // namespace opt
}  // namespace mindspore
