| // Copyright (c) 2018 Google LLC |
| // |
| // 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 SOURCE_REDUCE_REDUCTION_OPPORTUNITY_H_ |
| #define SOURCE_REDUCE_REDUCTION_OPPORTUNITY_H_ |
| |
| #include "spirv-tools/libspirv.hpp" |
| |
| namespace spvtools { |
| namespace reduce { |
| |
| // Abstract class capturing an opportunity to apply a reducing transformation. |
| class ReductionOpportunity { |
| public: |
| ReductionOpportunity() = default; |
| virtual ~ReductionOpportunity() = default; |
| |
| // Determines whether the opportunity can be applied; it may have been viable |
| // when discovered but later disabled by the application of some other |
| // reduction opportunity. |
| virtual bool PreconditionHolds() = 0; |
| |
| // A no-op if PreconditoinHolds() returns false; otherwise applies the |
| // opportunity. |
| void TryToApply(); |
| |
| protected: |
| // Apply the reduction opportunity. |
| virtual void Apply() = 0; |
| }; |
| |
| } // namespace reduce |
| } // namespace spvtools |
| |
| #endif // SOURCE_REDUCE_REDUCTION_OPPORTUNITY_H_ |