// Copyright (c) 2021 CINN Authors. All Rights Reserved.
//
// 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.

/**
 * This file implements the strategy to remove the unnecessary nested block.
 */
#pragma once

#include "paddle/cinn/ir/ir.h"
#include "paddle/cinn/pass/pass.h"

namespace cinn {
namespace optim {

class ReplaceCrossThreadReductionPass : public FuncPass {
 public:
  ReplaceCrossThreadReductionPass()
      : FuncPass("replace_cross_thread_reduction") {}

  LogicalResult Run(ir::LoweredFunc func) override;
};

/**
 * Replace cross thread reduction to external call.
 */
void ReplaceCrossThreadReduction(ir::LoweredFunc fn);

}  // namespace optim
}  // namespace cinn