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_CHANGE_OPERAND_REDUCTION_OPPORTUNITY_H_ 16 #define SOURCE_REDUCE_CHANGE_OPERAND_REDUCTION_OPPORTUNITY_H_ 17 18 #include "reduction_opportunity.h" 19 #include "source/opt/instruction.h" 20 #include "spirv-tools/libspirv.h" 21 22 namespace spvtools { 23 namespace reduce { 24 25 using namespace opt; 26 27 // Captures the opportunity to change an id operand of an instruction to some 28 // other id. 29 class ChangeOperandReductionOpportunity : public ReductionOpportunity { 30 public: 31 // Constructs the opportunity to replace operand |operand_index| of |inst| 32 // with |new_id|. 33 ChangeOperandReductionOpportunity(Instruction* inst, uint32_t operand_index, 34 uint32_t new_id) 35 : inst_(inst), 36 operand_index_(operand_index), 37 original_id_(inst->GetOperand(operand_index).words[0]), 38 original_type_(inst->GetOperand(operand_index).type), 39 new_id_(new_id) {} 40 41 // Determines whether the opportunity can be applied; it may have been viable 42 // when discovered but later disabled by the application of some other 43 // reduction opportunity. 44 bool PreconditionHolds() override; 45 46 protected: 47 // Apply the change of operand. 48 void Apply() override; 49 50 private: 51 Instruction* const inst_; 52 const uint32_t operand_index_; 53 const uint32_t original_id_; 54 const spv_operand_type_t original_type_; 55 const uint32_t new_id_; 56 }; 57 58 } // namespace reduce 59 } // namespace spvtools 60 61 #endif // SOURCE_REDUCE_CHANGE_OPERAND_REDUCTION_OPPORTUNITY_H_ 62
