1 | /* Copyright 2018 The TensorFlow Authors. All Rights Reserved. |
2 | |
3 | Licensed under the Apache License, Version 2.0 (the "License"); |
4 | you may not use this file except in compliance with the License. |
5 | You may obtain a copy of the License at |
6 | |
7 | http://www.apache.org/licenses/LICENSE-2.0 |
8 | |
9 | Unless required by applicable law or agreed to in writing, software |
10 | distributed under the License is distributed on an "AS IS" BASIS, |
11 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
12 | See the License for the specific language governing permissions and |
13 | limitations 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 | |
24 | namespace 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. |
33 | class 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 | |