// There can only be non-truncating cast op's prior to the call.
  for (; it != block.rend(); ++it) {
    CastOp cast = dyn_cast<CastOp>(*it);
    if (!cast || cast.getTruncate()) return std::nullopt;
  }

  return call;
}

using ArgMatcherFn = function_ref<bool(Value, Region&, Value, Region&)>;

// Returns whether the arguments of the given 2 calls are match (after looking