AttrType &max_value) const {
    Value min = tf_op.getMin(), max = tf_op.getMax();
    if (auto min_id = min.getDefiningOp<TF::IdentityOp>()) {
      min = min_id.getInput();
    }
    if (auto max_id = max.getDefiningOp<TF::IdentityOp>()) {
      max = max_id.getInput();
    }

    if (!matchPattern(min, m_Constant(&min_value))) {
      return false;
    }

  // isn't a composite op. The following ops are explicitly skipped here because
  // their "no-op" expansion is known to cause problems in some cases.
  static const char* kOpsToSkip[] = {
      "IdentityOp",
      "NoOp",              // b/174596063
      "OptionalHasValue",  // b/173136483
      "OptionalGetValue",  // b/173136483
      "VarHandleOp",       // b/176819198
  };
  for (const char* skip : kOpsToSkip) {

  return value.getDefiningOp();
}

// TODO(b/158596585): Replace this with a cost model analysis.
bool IsTrivialUnaryOperation(Operation* op) {
  return llvm::isa<TF::CastOp, TF::IdentityOp>(op);
}

// Adds outside compilation attributes to unary ops such as Identity/Cast ops
// at the head of TPU computation that is used only by other outside compiled