port = {0};
    }
  }
  ValuePort(PointerUnion<Operation*, BlockArgument> producer,
            SmallVector<unsigned int, 2> port)
      : producer(producer), port(port) {}

  raw_ostream& print(raw_ostream& os) const {
    if (auto* op = producer.dyn_cast<Operation*>())
      os << "op " << op->getName();
    if (auto ba = producer.dyn_cast<BlockArgument>())
      os << "block_arg " << ba.getArgNumber();

#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/FormatVariadic.h"
#include "llvm/Support/raw_ostream.h"
#include "mlir/Dialect/Arith/IR/Arith.h"  // from @llvm-project
#include "mlir/Dialect/Func/IR/FuncOps.h"  // from @llvm-project
#include "mlir/Dialect/Quant/QuantTypes.h"  // from @llvm-project