optimizer.RegisterPass(spvtools::CreateAggressiveDCEPass());
optimizer.RegisterPass(spvtools::CreateVectorDCEPass());
optimizer.RegisterPass(spvtools::CreateDeadInsertElimPass());
optimizer.RegisterPass(spvtools::CreateAggressiveDCEPass());
optimizer.RegisterPass(spvtools::CreateVectorDCEPass());
optimizer.RegisterPass(spvtools::CreateDeadInsertElimPass());