426 	struct symbol *sym1, *sym2;  in expr_join_or()  local
438 		sym1 = tmp->left.sym;  in expr_join_or()
440 		sym1 = e1->left.sym;  in expr_join_or()
447 	if (sym1 != sym2)  in expr_join_or()
449 	if (sym1->type != S_BOOLEAN && sym1->type != S_TRISTATE)  in expr_join_or()
451 	if (sym1->type == S_TRISTATE) {  in expr_join_or()
456 			return expr_alloc_comp(E_UNEQUAL, sym1, &symbol_no);  in expr_join_or()
462 			return expr_alloc_comp(E_UNEQUAL, sym1, &symbol_mod);  in expr_join_or()
468 			return expr_alloc_comp(E_UNEQUAL, sym1, &symbol_yes);  in expr_join_or()
471 	if (sym1->type == S_BOOLEAN && sym1 == sym2) {  in expr_join_or()
490 	struct symbol *sym1, *sym2;  in expr_join_and()  local
502 		sym1 = tmp->left.sym;  in expr_join_and()
504 		sym1 = e1->left.sym;  in expr_join_and()
511 	if (sym1 != sym2)  in expr_join_and()
513 	if (sym1->type != S_BOOLEAN && sym1->type != S_TRISTATE)  in expr_join_and()
519 		return expr_alloc_comp(E_EQUAL, sym1, &symbol_yes);  in expr_join_and()
524 		return expr_alloc_symbol(sym1);  in expr_join_and()
529 		return expr_alloc_comp(E_EQUAL, sym1, &symbol_yes);  in expr_join_and()
531 	if (sym1->type == S_TRISTATE) {  in expr_join_and()
536 				return sym2 != e2->right.sym ? expr_alloc_comp(E_EQUAL, sym1, sym2)  in expr_join_and()
543 				return sym2 != e1->right.sym ? expr_alloc_comp(E_EQUAL, sym1, sym2)  in expr_join_and()
550 			return expr_alloc_comp(E_EQUAL, sym1, &symbol_mod);  in expr_join_and()
556 			return expr_alloc_comp(E_EQUAL, sym1, &symbol_no);  in expr_join_and()
562 			return expr_alloc_comp(E_EQUAL, sym1, &symbol_yes);  in expr_join_and()