SET_HDR           196 gc/include/private/gc_hdrs.h #   define SET_HDR(p, hhdr) HDR_INNER(p) = (hhdr)
SET_HDR           221 gc/include/private/gc_hdrs.h #   define SET_HDR(p, hhdr) { register hdr ** _ha; GET_HDR_ADDR(p, _ha); \