if (ir->condition ||
this->channels >= 4 ||
!single_channel_write_mask(ir->write_mask) ||
+ this->assignment[write_mask_to_swizzle(ir->write_mask)] != NULL ||
(lhs && !ir->lhs->equals(lhs)) ||
(rhs && !ir->rhs->equals(rhs, ir_type_swizzle))) {
try_vectorize();