428 	struct symbol *sym1, *sym2;  in expr_join_or()  local
440 		sym1 = tmp->left.sym;  in expr_join_or()
442 		sym1 = e1->left.sym;  in expr_join_or()
449 	if (sym1 != sym2)  in expr_join_or()
451 	if (sym1->type != S_BOOLEAN && sym1->type != S_TRISTATE)  in expr_join_or()
453 	if (sym1->type == S_TRISTATE) {  in expr_join_or()
458 			return expr_alloc_comp(E_UNEQUAL, sym1, &symbol_no);  in expr_join_or()
464 			return expr_alloc_comp(E_UNEQUAL, sym1, &symbol_mod);  in expr_join_or()
470 			return expr_alloc_comp(E_UNEQUAL, sym1, &symbol_yes);  in expr_join_or()
473 	if (sym1->type == S_BOOLEAN && sym1 == sym2) {  in expr_join_or()
492 	struct symbol *sym1, *sym2;  in expr_join_and()  local
504 		sym1 = tmp->left.sym;  in expr_join_and()
506 		sym1 = e1->left.sym;  in expr_join_and()
513 	if (sym1 != sym2)  in expr_join_and()
515 	if (sym1->type != S_BOOLEAN && sym1->type != S_TRISTATE)  in expr_join_and()
521 		return expr_alloc_comp(E_EQUAL, sym1, &symbol_yes);  in expr_join_and()
526 		return expr_alloc_symbol(sym1);  in expr_join_and()
531 		return expr_alloc_comp(E_EQUAL, sym1, &symbol_yes);  in expr_join_and()
533 	if (sym1->type == S_TRISTATE) {  in expr_join_and()
538 				return sym2 != e2->right.sym ? expr_alloc_comp(E_EQUAL, sym1, sym2)  in expr_join_and()
545 				return sym2 != e1->right.sym ? expr_alloc_comp(E_EQUAL, sym1, sym2)  in expr_join_and()
552 			return expr_alloc_comp(E_EQUAL, sym1, &symbol_mod);  in expr_join_and()
558 			return expr_alloc_comp(E_EQUAL, sym1, &symbol_no);  in expr_join_and()
564 			return expr_alloc_comp(E_EQUAL, sym1, &symbol_yes);  in expr_join_and()