EVER_MATCHED_SOMETHING
EVER_MATCHED_SOMETHING (reg_info[this_reg])); \
= EVER_MATCHED_SOMETHING (reg_info[r]) \
EVER_MATCHED_SOMETHING (reg_info[mcnt]) = 0;
if (EVER_MATCHED_SOMETHING (reg_info[*p]))
EVER_MATCHED_SOMETHING (reg_info[*p]) = 0;