1 /* Copyright 2017 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_HLO_CONSTANT_FOLDING_H_ 17 #define TENSORFLOW_COMPILER_XLA_SERVICE_HLO_CONSTANT_FOLDING_H_ 18 19 #include "tensorflow/compiler/xla/service/hlo_module.h" 20 #include "tensorflow/compiler/xla/service/hlo_pass_interface.h" 21 22 namespace xla { 23 24 // A pass which performs constant folding in order to avoid unnecessary 25 // computation on constants. 26 class HloConstantFolding : public HloModulePass { 27 public: name()28 absl::string_view name() const override { return "constant_folding"; } 29 30 // Run constant folding operations on the given module. Returns whether the 31 // module was changed (constant expressions folded). 32 StatusOr<bool> Run(HloModule* module) override; 33 }; 34 35 } // namespace xla 36 37 #endif // TENSORFLOW_COMPILER_XLA_SERVICE_HLO_CONSTANT_FOLDING_H_ 38