clear_mark_bit_from_hdr 1256 gc/include/private/gc_priv.h # define clear_mark_bit_from_hdr(hhdr,n) ((hhdr)->hb_marks[(n)>>1]) = 0
clear_mark_bit_from_hdr 1263 gc/include/private/gc_priv.h # define clear_mark_bit_from_hdr(hhdr,n) (hhdr)->hb_marks[divWORDSZ(n)] \