778 int expr_contains_symbol(struct expr *dep, struct symbol *sym)  in expr_contains_symbol()  argument
780 	if (!dep)  in expr_contains_symbol()
783 	switch (dep->type) {  in expr_contains_symbol()
786 		return expr_contains_symbol(dep->left.expr, sym) ||  in expr_contains_symbol()
787 		       expr_contains_symbol(dep->right.expr, sym);  in expr_contains_symbol()
789 		return dep->left.sym == sym;  in expr_contains_symbol()
792 		return dep->left.sym == sym ||  in expr_contains_symbol()
793 		       dep->right.sym == sym;  in expr_contains_symbol()
795 		return expr_contains_symbol(dep->left.expr, sym);  in expr_contains_symbol()
802 bool expr_depends_symbol(struct expr *dep, struct symbol *sym)  in expr_depends_symbol()  argument
804 	if (!dep)  in expr_depends_symbol()
807 	switch (dep->type) {  in expr_depends_symbol()
809 		return expr_depends_symbol(dep->left.expr, sym) ||  in expr_depends_symbol()
810 		       expr_depends_symbol(dep->right.expr, sym);  in expr_depends_symbol()
812 		return dep->left.sym == sym;  in expr_depends_symbol()
814 		if (dep->left.sym == sym) {  in expr_depends_symbol()
815 			if (dep->right.sym == &symbol_yes || dep->right.sym == &symbol_mod)  in expr_depends_symbol()
820 		if (dep->left.sym == sym) {  in expr_depends_symbol()
821 			if (dep->right.sym == &symbol_no)  in expr_depends_symbol()