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_COMPARISON_EXPANDER_H_ 17 #define TENSORFLOW_COMPILER_XLA_SERVICE_COMPARISON_EXPANDER_H_ 18 19 #include <utility> 20 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 // A pass which performs expansion of the comparison operator to support total 28 // order comparison of floating point numbers. 29 class ComparisonExpander : public OpExpanderPass { 30 public: 31 explicit ComparisonExpander() = default; 32 ~ComparisonExpander() override = default; name()33 absl::string_view name() const override { return "comparison-expander"; } 34 35 private: 36 // Returns `true` if `instruction` should be expanded by this pass. 37 bool InstructionMatchesPattern(HloInstruction* instruction) override; 38 // Returns a replacement for `instruction`, or nullptr if no replacement is 39 // needed (e.g. only the to_apply subcomputation of the instruction was 40 // modified). 41 StatusOr<HloInstruction*> ExpandInstruction( 42 HloInstruction* instruction) override; 43 }; 44 45 } // namespace xla 46 47 #endif // TENSORFLOW_COMPILER_XLA_SERVICE_COMPARISON_EXPANDER_H_ 48