// Copyright (c) 2023 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.

#include <gtest/gtest.h>

#include "paddle/cinn/frontend/decomposer/test_helper.h"

namespace cinn {
namespace frontend {

TEST(DCE, Test_0) {
  NetBuilder net_builder("Test_0");
  // create model
  int h = 32, w = 32;
  auto A = net_builder.CreateInput(Float(32), {h, w}, "A");
  auto B = net_builder.CreateInput(Float(32), {h, w}, "B");
  auto C = net_builder.Add(A, B);
  auto D = net_builder.Multiply(A, B);

  auto fetch_ids = {D->id};
  auto program   = net_builder.Build();
  auto target    = common::DefaultTarget();

  auto graph = std::make_shared<hlir::framework::Graph>(program, fetch_ids, target);
  hlir::framework::ApplyPass(graph.get(), "DCE");

  CHECK_EQ(graph->nodes().size(), 4);
}

TEST(DCE, Test_1) {
  NetBuilder net_builder("Test_1");
  // create model
  int h = 32, w = 32;
  auto A = net_builder.CreateInput(Float(32), {h, w}, "A");
  auto B = net_builder.CreateInput(Float(32), {h, w}, "B");
  auto C = net_builder.Add(A, B);
  auto D = net_builder.Multiply(A, B);
  auto E = net_builder.Divide(A, B);
  auto F = net_builder.Add(C, D);
  auto G = net_builder.Add(D, E);
  auto H = net_builder.Add(E, G);

  auto fetch_ids = {F->id};
  auto program   = net_builder.Build();
  auto target    = common::DefaultTarget();

  auto graph = std::make_shared<hlir::framework::Graph>(program, fetch_ids, target);
  hlir::framework::ApplyPass(graph.get(), "DCE");
  CHECK_EQ(graph->nodes().size(), 8);
}

}  // namespace frontend
}  // namespace cinn