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_TO_UNDEF_REDUCTION_OPPORTUNITY_H_ 16 #define SOURCE_REDUCE_CHANGE_OPERAND_TO_UNDEF_REDUCTION_OPPORTUNITY_H_ 17 18 #include "source/opt/instruction.h" 19 #include "source/reduce/reduction_opportunity.h" 20 #include "spirv-tools/libspirv.h" 21 22 namespace spvtools { 23 namespace reduce { 24 25 // An opportunity to replace an id operand of an instruction with undef. 26 class ChangeOperandToUndefReductionOpportunity : public ReductionOpportunity { 27 public: 28 // Constructs the opportunity to replace operand |operand_index| of |inst| 29 // with undef. ChangeOperandToUndefReductionOpportunity(opt::IRContext * context,opt::Instruction * inst,uint32_t operand_index)30 ChangeOperandToUndefReductionOpportunity(opt::IRContext* context, 31 opt::Instruction* inst, 32 uint32_t operand_index) 33 : context_(context), 34 inst_(inst), 35 operand_index_(operand_index), 36 original_id_(inst->GetOperand(operand_index).words[0]) {} 37 38 bool PreconditionHolds() override; 39 40 protected: 41 void Apply() override; 42 43 private: 44 opt::IRContext* context_; 45 opt::Instruction* const inst_; 46 const uint32_t operand_index_; 47 const uint32_t original_id_; 48 }; 49 50 } // namespace reduce 51 } // namespace spvtools 52 53 #endif // SOURCE_REDUCE_CHANGE_OPERAND_TO_UNDEF_REDUCTION_OPPORTUNITY_H_ 54