1 /* Copyright 2021 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_TRANSFORMS_TOPOSORT_H_ 17 #define TENSORFLOW_CORE_TRANSFORMS_TOPOSORT_H_ 18 19 #include <memory> 20 21 #include "mlir/Pass/Pass.h" // from @llvm-project 22 #include "tensorflow/core/ir/dialect.h" 23 24 namespace mlir { 25 namespace tfg { 26 27 // Sort topologically (following SSA defs-uses edges) the given block. 28 // The sort is stable. Optionally accepts an instance of the TFG dialect for 29 // virtually breaking NextIteration -> Merge cycles. 30 void SortTopologically(Block *block, TFGraphDialect *dialect = nullptr); 31 32 // Programmatically create a pass that topologically sort graphs. 33 std::unique_ptr<Pass> CreateTopoSortPass(); 34 35 } // namespace tfg 36 } // namespace mlir 37 38 #endif // TENSORFLOW_CORE_TRANSFORMS_TOPOSORT_H_ 39