355 	struct symbol *sym1, *sym2;  in expr_join_or()  local
367 		sym1 = tmp->left.sym;  in expr_join_or()
369 		sym1 = e1->left.sym;  in expr_join_or()
376 	if (sym1 != sym2)  in expr_join_or()
378 	if (sym1->type != S_BOOLEAN && sym1->type != S_TRISTATE)  in expr_join_or()
380 	if (sym1->type == S_TRISTATE) {  in expr_join_or()
385 			return expr_alloc_comp(E_UNEQUAL, sym1, &symbol_no);  in expr_join_or()
391 			return expr_alloc_comp(E_UNEQUAL, sym1, &symbol_mod);  in expr_join_or()
397 			return expr_alloc_comp(E_UNEQUAL, sym1, &symbol_yes);  in expr_join_or()
400 	if (sym1->type == S_BOOLEAN && sym1 == sym2) {  in expr_join_or()
419 	struct symbol *sym1, *sym2;  in expr_join_and()  local
431 		sym1 = tmp->left.sym;  in expr_join_and()
433 		sym1 = e1->left.sym;  in expr_join_and()
440 	if (sym1 != sym2)  in expr_join_and()
442 	if (sym1->type != S_BOOLEAN && sym1->type != S_TRISTATE)  in expr_join_and()
448 		return expr_alloc_comp(E_EQUAL, sym1, &symbol_yes);  in expr_join_and()
453 		return expr_alloc_symbol(sym1);  in expr_join_and()
458 		return expr_alloc_comp(E_EQUAL, sym1, &symbol_yes);  in expr_join_and()
460 	if (sym1->type == S_TRISTATE) {  in expr_join_and()
465 				return sym2 != e2->right.sym ? expr_alloc_comp(E_EQUAL, sym1, sym2)  in expr_join_and()
472 				return sym2 != e1->right.sym ? expr_alloc_comp(E_EQUAL, sym1, sym2)  in expr_join_and()
479 			return expr_alloc_comp(E_EQUAL, sym1, &symbol_mod);  in expr_join_and()
485 			return expr_alloc_comp(E_EQUAL, sym1, &symbol_no);  in expr_join_and()
491 			return expr_alloc_comp(E_EQUAL, sym1, &symbol_yes);  in expr_join_and()