1 /* Copyright 2020 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_ALL_TO_ALL_DECOMPOSER_H_ 17 #define TENSORFLOW_COMPILER_XLA_SERVICE_ALL_TO_ALL_DECOMPOSER_H_ 18 19 #include "tensorflow/compiler/xla/service/hlo_instruction.h" 20 #include "tensorflow/compiler/xla/service/hlo_instructions.h" 21 #include "tensorflow/compiler/xla/service/hlo_module.h" 22 #include "tensorflow/compiler/xla/service/hlo_pass_interface.h" 23 #include "tensorflow/compiler/xla/service/op_expander_pass.h" 24 25 namespace xla { 26 27 // AllToAllDecomposer is a pass which converts unsupported array all_to_all 28 // into tuple all_to_all or array all_to_all with a minimum rank where the split 29 // dimension is the size of the replica_groups. 30 class AllToAllDecomposer : public OpExpanderPass { 31 public: 32 explicit AllToAllDecomposer(bool decompose_to_tuple = true, 33 int64 min_array_rank = 0) decompose_to_tuple_(decompose_to_tuple)34 : decompose_to_tuple_(decompose_to_tuple), 35 min_array_rank_(min_array_rank) {} 36 ~AllToAllDecomposer() override = default; name()37 absl::string_view name() const override { return "all_to_all_decomposer"; } 38 39 private: 40 bool InstructionMatchesPattern(HloInstruction* instruction) override; 41 StatusOr<HloInstruction*> ExpandInstruction( 42 HloInstruction* instruction) override; 43 bool decompose_to_tuple_; 44 int64 min_array_rank_; 45 }; 46 47 } // namespace xla 48 49 #endif // TENSORFLOW_COMPILER_XLA_SERVICE_ALL_TO_ALL_DECOMPOSER_H_ 50