SEEN_DATAREF
u8 seen_or_pass0 = (pass == 0) ? (SEEN_XREG | SEEN_DATAREF | SEEN_MEM) : seen;
if (seen_or_pass0 & SEEN_DATAREF) {
common_load: seen |= SEEN_DATAREF;
common_load_ind: seen |= SEEN_DATAREF | SEEN_XREG;