for (auto operand : op->getOperands()) {
          PropagateInputToOutput(operand, result);
        }
      }
    } else if (llvm::isa<IdentityNOp, IdentityOp, CastOp>(op)) {
      for (auto result : filter_resources(op->getResults()))
        PropagateInputToOutput(op->getOperand(result.getResultNumber()),
                               result);

  const llvm::SmallSetVector<Value, 8>& GetUniqueIdResources(int64_t id) const;

  // Propagates the resource IDs from an input operand to a result. Returns
  // true of the mapping has changed.
  bool PropagateInputToOutput(const Value& operand, const OpResult& result);

  // Analyzes while loops to compute resource IDs for the loop results.
  // `body_info` is the backtrack analysis info for the loop body.