1/* Copyright 2018 The TensorFlow Authors. All Rights Reserved.
2
3Licensed under the Apache License, Version 2.0 (the "License");
4you may not use this file except in compliance with the License.
5You may obtain a copy of the License at
6
7 http://www.apache.org/licenses/LICENSE-2.0
8
9Unless required by applicable law or agreed to in writing, software
10distributed under the License is distributed on an "AS IS" BASIS,
11WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12See the License for the specific language governing permissions and
13limitations under the License.
14==============================================================================*/
15
16#ifndef TENSORFLOW_CORE_COMMON_RUNTIME_LOWER_FUNCTIONAL_OPS_H_
17#define TENSORFLOW_CORE_COMMON_RUNTIME_LOWER_FUNCTIONAL_OPS_H_
18
19#include "absl/types/optional.h"
20#include "tensorflow/core/common_runtime/inline_function_utils.h"
21#include "tensorflow/core/common_runtime/optimization_registry.h"
22#include "tensorflow/core/lib/core/status.h"
23
24namespace tensorflow {
25
26// Rewrite functional ops into low level primitives:
27// - If/While ops lowered into low level control flow primitives: Switch, Merge,
28// Enter, Exit, NextIteration
29// - Function calls inlined into the main graph
30//
31// IMPORTANT: Although SymbolicGradient is a function call, we currently do not
32// lower it, because it has been deprecated for a while.
33class LowerFunctionalOpsPass : public GraphOptimizationPass {
34 public:
35 LowerFunctionalOpsPass() = default;
36
37 Status Run(const GraphOptimizationPassOptions& options) override;
38
39 static constexpr const char* const kLowerUsingSwitchMergeAttr =
40 LowerFunctionalOpsConstants::kLowerUsingSwitchMergeAttr;
41 static constexpr const char* const kLowerAsMultiDeviceFunctionAttr =
42 LowerFunctionalOpsConstants::kLowerAsMultiDeviceFunctionAttr;
43};
44
45} // namespace tensorflow
46
47#endif // TENSORFLOW_CORE_COMMON_RUNTIME_LOWER_FUNCTIONAL_OPS_H_
48