3986     int	    in_use; // number of subexpr with useful info  member
4073     for (j = 0; j < sub->in_use; j++)  in log_subexpr()
4147     sub->in_use = 0;  in clear_sub()
4156     to->in_use = from->in_use;  in copy_sub()
4157     if (from->in_use > 0)  in copy_sub()
4163 			sizeof(struct multipos) * from->in_use);  in copy_sub()
4167 			sizeof(struct linepos) * from->in_use);  in copy_sub()
4177     if (to->in_use < from->in_use)  in copy_sub_off()
4178 	to->in_use = from->in_use;  in copy_sub_off()
4179     if (from->in_use > 1)  in copy_sub_off()
4185 			sizeof(struct multipos) * (from->in_use - 1));  in copy_sub_off()
4189 			sizeof(struct linepos) * (from->in_use - 1));  in copy_sub_off()
4231     todo = sub1->in_use > sub2->in_use ? sub1->in_use : sub2->in_use;  in sub_equal()
4236 	    if (i < sub1->in_use)  in sub_equal()
4240 	    if (i < sub2->in_use)  in sub_equal()
4252 		if (i < sub1->in_use)  in sub_equal()
4256 		if (i < sub2->in_use)  in sub_equal()
4272 	    if (i < sub1->in_use)  in sub_equal()
4276 	    if (i < sub2->in_use)  in sub_equal()
4284 		if (i < sub1->in_use)  in sub_equal()
4288 		if (i < sub2->in_use)  in sub_equal()
4311     if (sub->in_use <= 0)  in report_state()
4782 		if (subidx < sub->in_use)  in addstate()
4789 		    save_in_use = sub->in_use;  in addstate()
4790 		    for (i = sub->in_use; i < subidx; ++i)  in addstate()
4795 		    sub->in_use = subidx + 1;  in addstate()
4812 		if (subidx < sub->in_use)  in addstate()
4819 		    save_in_use = sub->in_use;  in addstate()
4820 		    for (i = sub->in_use; i < subidx; ++i)  in addstate()
4825 		    sub->in_use = subidx + 1;  in addstate()
4849 		sub->in_use = save_in_use;  in addstate()
4904 	    save_in_use = sub->in_use;  in addstate()
4905 	    if (sub->in_use <= subidx)  in addstate()
4906 		sub->in_use = subidx + 1;  in addstate()
4947 	    sub->in_use = save_in_use;  in addstate()
5147     if (sub->in_use <= subidx)  in match_backref()
5823 	m->norm.in_use = 1;  in nfa_regmatch()
5934 		if (t->subs.norm.in_use <= 0)  in nfa_regmatch()
6062 			int in_use = m->norm.in_use;  in nfa_regmatch()  local
6109 			m->norm.in_use = in_use;  in nfa_regmatch()
6123 			pim.subs.norm.in_use = 0;  in nfa_regmatch()
6125 			pim.subs.synt.in_use = 0;  in nfa_regmatch()
7254 	for (i = 0; i < subs.norm.in_use; i++)  in nfa_regtry()
7280 	for (i = 0; i < subs.norm.in_use; i++)  in nfa_regtry()
7304 	for (i = 1; i < subs.synt.in_use; i++)  in nfa_regtry()