// through a ToBoolOp) between the region yield and the call. Returns none if
// the region does not conform to this pattern.
std::optional<func::CallOp> IsSingleCallRegion(Region& region,
                                               bool allow_to_bool = false) {
  if (!llvm::hasSingleElement(region)) return std::nullopt;

  Block& block = region.front();
  auto it = block.rbegin();

            String region = matcher.group(2);
            String key = matcher.group(4);
            Region derivedRegion;
            if (region.equals("external-1")) {
                derivedRegion = Region.getRegion(Regions.US_EAST_1);
            } else {
                derivedRegion = RegionUtils.getRegion(region);
            }

            this.region = Optional.of(derivedRegion);

// Inserts a `CalibrationStatisticsSaverOp` to the end of the region.
LogicalResult InsertCalibrationStatisticsSaverOp(
    Region& region, MLIRContext& ctx, absl::string_view output_file_path,
    const std::unordered_set<std::string>& aggregator_ops_to_ignore) {
  SmallVector<Value> statistics_outputs;
  SmallVector<StringRef> ids;
  SmallVector<int32_t> calibration_methods;
  FindCustomAggregatorOps(region, aggregator_ops_to_ignore, statistics_outputs,

						// We visit all entries for which the script was not
						// defined, including the ones where the region was not
						// defined. This allows for proper disambiguation within
						// regions.
						if x.flags&scriptInFrom == 0 && t.RegionID.Contains(Region(x.region)) {
							tt.RegionID = Region(x.region)
							tt.setUndefinedScript(Script(x.script))
							goodScript = goodScript && tt.ScriptID == Script(x.script)

	}

	cred.scope.region = credElements[1]
	// Verify if region is valid.
	sRegion := cred.scope.region
	// Region is set to be empty, we use whatever was sent by the
	// request and proceed further. This is a work-around to address
	// an important problem for ListBuckets() getting signed with
	// different regions.
	if region == "" {
		region = sRegion
	}

	now := UTCNow()
	credentialTemplate := "%s/%s/%s/s3/aws4_request"

	region := globalSite.Region()
	accessKeyID := globalActiveCred.AccessKey
	testCases := []struct {
		queryParams map[string]string
		headers     map[string]string
		region      string
		expected    APIErrorCode
	}{
		// (0) Should error without a set URL query.
		{
			region:   globalMinioDefaultRegion,
			expected: ErrInvalidQueryParams,
		},

	return sysAllocOS(n)
}

// sysUnused transitions a memory region from Ready to Prepared. It notifies the
// operating system that the physical pages backing this memory region are no
// longer needed and can be reused for other purposes. The contents of a
// sysUnused memory region are considered forfeit and the region must not be
// accessed again until sysUsed is called.
func sysUnused(v unsafe.Pointer, n uintptr) {

  // Create a stand-alone region to hold all instructions in the cluster.
  Region region;
  region.push_back(new Block);

  // Move all operations in cluster to newly created region, stripping their
  // "device" attribute since launch op already carries device information.
  Block* block = &region.front();
  for (Operation* op : c.ops) {
    op->moveBefore(block, block->end());

	if region.Start != nil {
		startStack = region.Start.Stack()
		startTime = region.Start.Time()
		goroutine = region.Start.Goroutine()
	}
	if region.End != nil {
		endStack = region.End.Stack()
		endTime = region.End.Time()
		goroutine = region.End.Goroutine()
	}
	if goroutine == trace.NoGoroutine {
		return
	}
	arg := struct {
		TaskID uint64 `json:"taskid"`
	}{

// canonical form with a ccTLD. To get that ccTLD canonicalize r first. The
// region will already be canonicalized it was obtained from a Tag that was
// obtained using any of the default methods.
func (r Region) TLD() (Region, error) {
	tld, err := r.regionID.TLD()
	return Region{tld}, err
}

// Canonicalize returns the region or a possible replacement if the region is