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_GPU_ALIAS_PASSTHROUGH_PARAMS_H_ 17 #define TENSORFLOW_COMPILER_XLA_SERVICE_GPU_ALIAS_PASSTHROUGH_PARAMS_H_ 18 19 #include <memory> 20 21 #include "tensorflow/compiler/xla/service/hlo_instruction.h" 22 #include "tensorflow/compiler/xla/service/hlo_pass_interface.h" 23 24 namespace xla { 25 namespace gpu { 26 27 // This pass aliases input and output buffers that are associated with a 28 // parameter that is passed through to the module root unmodified. 29 // 30 // This pass assumes that parameters and the root use unnested shapes, which is 31 // the case for XLA:GPU. 32 // 33 // This pass must run prior to copy insertion. 34 class AliasPassthroughParams : public HloModulePass { 35 public: 36 AliasPassthroughParams() = default; 37 ~AliasPassthroughParams() override = default; name()38 absl::string_view name() const override { return "alias_passthrough_params"; } 39 40 StatusOr<bool> Run(HloModule* module) override; 41 }; 42 43 } // namespace gpu 44 } // namespace xla 45 46 #endif // TENSORFLOW_COMPILER_XLA_SERVICE_GPU_ALIAS_PASSTHROUGH_PARAMS_H_ 47