unsigned char *loc;
US_CHAR_TYPE *loc;
insert_op1 (op, loc, arg, end)    re_opcode_t op;    unsigned char *loc;    int arg;    unsigned char *end;{  register unsigned char *pfrom = end;  register unsigned char *pto = end + 3;  while (pfrom != loc)    *--pto = *--pfrom;  store_op1 (op, loc, arg);}