1751     char_u	*newsub = source;  in regtilde()  local
1757     for (p = newsub; *p; ++p)  in regtilde()
1765 		tmpsub = alloc(STRLEN(newsub) + prevlen);  in regtilde()
1769 		    len = (int)(p - newsub);	// not including ~  in regtilde()
1770 		    mch_memmove(tmpsub, newsub, (size_t)len);  in regtilde()
1778 		    if (newsub != source)	// already allocated newsub  in regtilde()
1779 			vim_free(newsub);  in regtilde()
1780 		    newsub = tmpsub;  in regtilde()
1781 		    p = newsub + len + prevlen;  in regtilde()
1800     if (newsub != source)	// newsub was allocated, just keep it  in regtilde()
1801 	reg_prev_sub = newsub;  in regtilde()
1803 	reg_prev_sub = vim_strsave(newsub);  in regtilde()
1804     return newsub;  in regtilde()