1 /* Copyright 2019 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_COMPILER_XLA_SERVICE_STABLE_SORT_EXPANDER_H_ 17 #define TENSORFLOW_COMPILER_XLA_SERVICE_STABLE_SORT_EXPANDER_H_ 18 19 #include "tensorflow/compiler/xla/service/hlo_instruction.h" 20 #include "tensorflow/compiler/xla/service/hlo_module.h" 21 #include "tensorflow/compiler/xla/service/hlo_pass_interface.h" 22 #include "tensorflow/compiler/xla/service/op_expander_pass.h" 23 #include "tensorflow/compiler/xla/statusor.h" 24 25 namespace xla { 26 27 // HLO pass which expands Sort ops that have the is_stable field set to true 28 // into equivalent Sort ops which guarantee stable sorting without relying on 29 // the is_stable field. 30 class StableSortExpander : public OpExpanderPass { 31 public: name()32 absl::string_view name() const override { return "stable-sort-expander"; } 33 34 private: 35 bool InstructionMatchesPattern(HloInstruction* instruction) override; 36 StatusOr<HloInstruction*> ExpandInstruction( 37 HloInstruction* instruction) override; 38 }; 39 40 } // namespace xla 41 42 #endif // TENSORFLOW_COMPILER_XLA_SERVICE_STABLE_SORT_EXPANDER_H_ 43