1 /* Copyright 2022 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_RESHAPE_DECOMPOSER_H_ 17 #define TENSORFLOW_COMPILER_XLA_SERVICE_RESHAPE_DECOMPOSER_H_ 18 19 #include "tensorflow/compiler/xla/service/hlo_pass_interface.h" 20 21 namespace xla { 22 23 // Decomposes a reshape which does not satisfy the ReshapeIsBitcast precondition 24 // into a reshape and a copy (physical transposition). Tries to create only one 25 // transposition, but when it's not possible, creates two. 26 // 27 // Postcondition: ReshapeIsBitcast is true for all reshapes in the graph. 28 class ReshapeDecomposer : public HloModulePass { 29 public: name()30 absl::string_view name() const override { return "reshape-decomposer"; } 31 32 using HloPassInterface::Run; 33 StatusOr<bool> Run( 34 HloModule* module, 35 const absl::flat_hash_set<absl::string_view>& execution_threads) override; 36 }; 37 38 } // namespace xla 39 40 #endif // TENSORFLOW_COMPILER_XLA_SERVICE_RESHAPE_DECOMPOSER_H_ 41