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 #include "source/reduce/change_operand_to_undef_reduction_opportunity.h" 16 17 #include "source/opt/ir_context.h" 18 #include "source/reduce/reduction_util.h" 19 20 namespace spvtools { 21 namespace reduce { 22 PreconditionHolds()23bool ChangeOperandToUndefReductionOpportunity::PreconditionHolds() { 24 // Check that the instruction still has the original operand. 25 return inst_->NumOperands() > operand_index_ && 26 inst_->GetOperand(operand_index_).words[0] == original_id_; 27 } 28 Apply()29void ChangeOperandToUndefReductionOpportunity::Apply() { 30 auto operand = inst_->GetOperand(operand_index_); 31 auto operand_id = operand.words[0]; 32 auto operand_id_def = context_->get_def_use_mgr()->GetDef(operand_id); 33 auto operand_type_id = operand_id_def->type_id(); 34 // The opportunity should not exist unless this holds. 35 assert(operand_type_id); 36 auto undef_id = FindOrCreateGlobalUndef(context_, operand_type_id); 37 inst_->SetOperand(operand_index_, {undef_id}); 38 context_->InvalidateAnalyses(opt::IRContext::kAnalysisDefUse); 39 } 40 41 } // namespace reduce 42 } // namespace spvtools 43