1 // Copyright (c) 2018 Google LLC 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 #ifndef SOURCE_REDUCE_REDUCTION_OPPORTUNITY_H_ 16 #define SOURCE_REDUCE_REDUCTION_OPPORTUNITY_H_ 17 18 #include "spirv-tools/libspirv.hpp" 19 20 namespace spvtools { 21 namespace reduce { 22 23 // Abstract class capturing an opportunity to apply a reducing transformation. 24 class ReductionOpportunity { 25 public: 26 ReductionOpportunity() = default; 27 virtual ~ReductionOpportunity() = default; 28 29 // Determines whether the opportunity can be applied; it may have been viable 30 // when discovered but later disabled by the application of some other 31 // reduction opportunity. 32 virtual bool PreconditionHolds() = 0; 33 34 // A no-op if PreconditoinHolds() returns false; otherwise applies the 35 // opportunity. 36 void TryToApply(); 37 38 protected: 39 // Apply the reduction opportunity. 40 virtual void Apply() = 0; 41 }; 42 43 } // namespace reduce 44 } // namespace spvtools 45 46 #endif // SOURCE_REDUCE_REDUCTION_OPPORTUNITY_H_ 47
