// Return true if the op has non-empty "minmax" attribute.
static inline bool HasValidMinMaxAttribute(Operation* op) {
  auto minmax = op->getAttrOfType<ArrayAttr>("minmax");
  return minmax && minmax.getValue().size() == 2;
}

namespace {

/// This pattern matches and remove a tfl.fake_quant if all the users of this op
/// and itself have "minmax" attribute set.