}

  // Returns if its legal to inline 'src' region into the 'dest' region
  // attached to a TF Device operation.
  bool isLegalToInline(Region* dest, Region* src, bool wouldBeCloned,
                       IRMapping& valueMapping) const final {
    return true;
  }

  // Defines the legality of inlining TF Device operations into a region.
  bool isLegalToInline(Operation* call, Region*, bool, IRMapping&) const final {
    return true;

  auto& region = op->getRegion(region_idx);
  region.getArgument(0).replaceAllUsesWith(implicit_operand);
  region.front().eraseArguments(0, region.getNumArguments());
}

// Rewrites an `mhlo.if` op or its region. If `region_idx` is not set, the op
// operands and results are rewritten. If `region_idx` is set, region

  }

  // Returns if its legal to inline 'src' region into the 'dest' region
  // attached to a TF operation.
  bool isLegalToInline(Region *dest, Region *src, bool wouldBeCloned,
                       IRMapping &valueMapping) const final {
    // Allow inlining in regions attached to region based control flow
    // operations only if the src region is a single block region

         *
         * Lock file is {@link java.io.RandomAccessFile} that has two regions:
         * - lock state region, locked for the duration of the operation
         * - lock info region, locked just to write the lock info or read info from it
         * <br><br>
         *
         * Algorithm:<br>
         * 1. We first try to acquire a lock on the state region with retries, see {@link #lockStateRegion(LockMode)}.<br>

  // Remove the original TPUExecute op.
  execute_launch.erase();

  // Move all regions from old parallel_execute to new parallel_execute.
  for (auto region : llvm::zip(new_parallel_execute_op->getRegions(),
                               parallel_execute_op->getRegions()))
    std::get<0>(region).takeBody(std::get<1>(region));

  // Remove the original parallel_execute.
  parallel_execute_op->dropAllUses();

  SymbolUserMap symbol_map(table, module);

  // Regions that contains ops requiring token input attributes.
  absl::flat_hash_set<Region*> regions_with_token;
  while (!worklist.empty()) {
    Operation* op = worklist.back();
    worklist.pop_back();

    Region* region = op->getParentRegion();
    regions_with_token.insert(region);

  }

  // Checks if a region only consists of ops that are quantizable in a nested
  // region.
  // tf.CustomAggregator op cannot be inserted into region of a StableHLO op,
  // thus calibration is impossible within a nested region. Therefore, when an
  // op involves a region, the op is only quantizable when the region only
  // consists of ops whose quantization parameters can be propagated from

			return
		}

		region = regionKV.Get(RegionName)
	}
	if region != "" {
		if !validRegionRegex.MatchString(region) {
			err = Errorf(
				"region '%s' is invalid, expected simple characters such as [us-east-1, myregion...]",
				region)
			return
		}
		s.region = region
	}

	}

	cred, _, errCode = checkKeyValid(r, signV4Values.Credential.accessKey)
	if errCode != ErrNone {
		return cred, "", "", time.Time{}, errCode
	}

	// Verify if region is valid.
	region = signV4Values.Credential.scope.region

	// Extract date, if not present throw error.
	var dateStr string
	if dateStr = req.Header.Get("x-amz-date"); dateStr == "" {
		if dateStr = r.Header.Get("Date"); dateStr == "" {

	if location == "" {
		location = globalSite.Region()
	}
	if !isValidLocation(location) {
		return location, ErrInvalidRegion
	}

	return location, ErrNone
}

// Validates input location is same as configured region
// of MinIO server.
func isValidLocation(location string) bool {
	region := globalSite.Region()
	return region == "" || region == location
}