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_REMOVE_INSTRUCTION_REDUCTION_OPPORTUNITY_H_ 16 #define SOURCE_REDUCE_REMOVE_INSTRUCTION_REDUCTION_OPPORTUNITY_H_ 17 18 #include "source/opt/instruction.h" 19 #include "source/reduce/reduction_opportunity.h" 20 21 namespace spvtools { 22 namespace reduce { 23 24 // An opportunity to remove an instruction from the SPIR-V module. 25 class RemoveInstructionReductionOpportunity : public ReductionOpportunity { 26 public: 27 // Constructs the opportunity to remove |inst|. RemoveInstructionReductionOpportunity(opt::Instruction * inst)28 explicit RemoveInstructionReductionOpportunity(opt::Instruction* inst) 29 : inst_(inst) {} 30 31 // Always returns true, as this opportunity can always be applied. 32 bool PreconditionHolds() override; 33 34 protected: 35 void Apply() override; 36 37 private: 38 opt::Instruction* inst_; 39 }; 40 41 } // namespace reduce 42 } // namespace spvtools 43 44 #endif // SOURCE_REDUCE_REMOVE_INSTRUCTION_REDUCTION_OPPORTUNITY_H_ 45