405 	struct symbol *sym1, *sym2;  in expr_join_or()  local
417 		sym1 = tmp->left.sym;  in expr_join_or()
419 		sym1 = e1->left.sym;  in expr_join_or()
426 	if (sym1 != sym2)  in expr_join_or()
428 	if (sym1->type != S_BOOLEAN && sym1->type != S_TRISTATE)  in expr_join_or()
430 	if (sym1->type == S_TRISTATE) {  in expr_join_or()
435 			return expr_alloc_comp(E_UNEQUAL, sym1, &symbol_no);  in expr_join_or()
441 			return expr_alloc_comp(E_UNEQUAL, sym1, &symbol_mod);  in expr_join_or()
447 			return expr_alloc_comp(E_UNEQUAL, sym1, &symbol_yes);  in expr_join_or()
450 	if (sym1->type == S_BOOLEAN && sym1 == sym2) {  in expr_join_or()
469 	struct symbol *sym1, *sym2;  in expr_join_and()  local
481 		sym1 = tmp->left.sym;  in expr_join_and()
483 		sym1 = e1->left.sym;  in expr_join_and()
490 	if (sym1 != sym2)  in expr_join_and()
492 	if (sym1->type != S_BOOLEAN && sym1->type != S_TRISTATE)  in expr_join_and()
498 		return expr_alloc_comp(E_EQUAL, sym1, &symbol_yes);  in expr_join_and()
503 		return expr_alloc_symbol(sym1);  in expr_join_and()
508 		return expr_alloc_comp(E_EQUAL, sym1, &symbol_yes);  in expr_join_and()
510 	if (sym1->type == S_TRISTATE) {  in expr_join_and()
515 				return sym2 != e2->right.sym ? expr_alloc_comp(E_EQUAL, sym1, sym2)  in expr_join_and()
522 				return sym2 != e1->right.sym ? expr_alloc_comp(E_EQUAL, sym1, sym2)  in expr_join_and()
529 			return expr_alloc_comp(E_EQUAL, sym1, &symbol_mod);  in expr_join_and()
535 			return expr_alloc_comp(E_EQUAL, sym1, &symbol_no);  in expr_join_and()
541 			return expr_alloc_comp(E_EQUAL, sym1, &symbol_yes);  in expr_join_and()