| /* Copyright 2017 The TensorFlow Authors. All Rights Reserved. |
| |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| ==============================================================================*/ |
| |
| #ifndef TENSORFLOW_COMPILER_XLA_SERVICE_CPU_CPU_COPY_INSERTION_H_ |
| #define TENSORFLOW_COMPILER_XLA_SERVICE_CPU_CPU_COPY_INSERTION_H_ |
| |
| #include "tensorflow/compiler/xla/service/hlo_module.h" |
| #include "tensorflow/compiler/xla/service/hlo_pass_interface.h" |
| |
| namespace xla { |
| |
| // Besides the modifications made by the generic xla::CopyInsertion, this |
| // CPU-specific copy insertion pass also adds copies to values live out of |
| // computations satisfying certain conditions (defined by constant or parameter, |
| // etc). This is necessary because of deficiencies of buffer |
| // assignment. Specifically, buffer assignment is computation-scoped and does |
| // not recognized aliasing between arguments and outputs of computations. |
| // |
| // TODO(b/62548313): Remove this when buffer assignment is smarter |
| // (module-scoped). |
| class CpuCopyInsertion : public HloModulePass { |
| public: |
| absl::string_view name() const override { return "copy-insertion"; } |
| |
| StatusOr<bool> Run(HloModule* module) override; |
| }; |
| |
| } // namespace xla |
| |
| #endif // TENSORFLOW_COMPILER_XLA_SERVICE_CPU_CPU_COPY_INSERTION_H_ |