};

// Return a bitvector that marks all return values that always come from
// the same value.
llvm::BitVector GetInvariantReturns(Region* region, int number_of_results) {
  llvm::BitVector invariant(number_of_results, true);
  std::vector<Value> used_argument(number_of_results, nullptr);
  for (Block& block : region->getBlocks()) {
    for (Operation& op : block.getOperations()) {
      if (!op.hasTrait<OpTrait::ReturnLike>()) continue;

      SetPotentiallyWritten(operand->get());
    }
  });
}

void ResourceAnalyzer::PropagatePotentiallyWrittenUpFromCallee(
    Region& region, Operation::operand_range propagate_to) {
  (void)AnalyzeRegion(region);
  for (auto t : llvm::zip(region.getArguments(), propagate_to)) {
    if (!IsResource(std::get<0>(t))) {
      continue;
    }
    if (IsPotentiallyWritten(std::get<0>(t))) {

      }
      // We treat block arguments of inner blocks as "results", too, in
      // the sense that they're values produced inside this op.
      for (Region& region : op->getRegions()) {
        for (Block& block : region.getBlocks()) {
          for (BlockArgument& arg : block.getArguments()) {
            all_internal_results.insert(arg);
          }
        }
      }
    });
  }

	case authTypeSigned, authTypePresigned:
		region := globalSite.Region()
		switch action {
		case policy.GetBucketLocationAction, policy.ListAllMyBucketsAction:
			region = ""
		}
		if s3Err = isReqAuthenticated(ctx, r, region, serviceS3); s3Err != ErrNone {
			return s3Err
		}
		cred, owner, s3Err = getReqAccessKeyV4(r, region, serviceS3)
	}
	if s3Err != ErrNone {
		return s3Err
	}

// explanation.
type sharedMem struct {
	// f is the file mapped into memory.
	f *os.File

	// region is the mapped region of virtual memory for f. The content of f may
	// be read or written through this slice.
	region []byte

	// removeOnClose is true if the file should be deleted by Close.
	removeOnClose bool

	// sys contains OS-specific information.
	sys sharedMemSys

      });

  py::class_<mlir::Region>(m, "Region")
      .def("back", &mlir::Region::back, py::return_value_policy::reference)
      .def("front", &mlir::Region::front, py::return_value_policy::reference)
      .def("add_block", [](mlir::Region& r) { r.push_back(new mlir::Block); })
      .def("push_back", &mlir::Region::push_back)
      .def("size", [](mlir::Region& r) { return r.getBlocks().size(); })

gcloud-list compute firewall-rules "name ~ 'default.*|k8s-fw.*|${INSTANCE_PREFIX}.*'"
GREP_REGEX=""
gcloud-list compute forwarding-rules ${REGION:+"region=(${REGION})"}
gcloud-list compute target-pools ${REGION:+"region=(${REGION})"}

gcloud-list logging sinks

  return moveLoopInvariantCode(
      loopLike.getLoopRegions(),
      [&](Value value, Region *) {
        return loopLike.isDefinedOutsideOfLoop(value);
      },
      [&](Operation *op, Region *region) {
        return ShouldMoveOutOfRegion(op, region, read_only_vars);
      },
      [&](Operation *op, Region *) { loopLike.moveOutOfLoop(op); });
}

void HoistLoopInvariantPass::runOnOperation() {

      // If the user is not in one of the regions, we are not interested in it.
      // Since all the sub-regions within this region (i.e., regions attached to
      // op's in this region) have themselves gone through lifting, all resource
      // users are expected to be operations in this region and not embedded
      // within other sub-regions attached to ops in this region. So the check

}

// Validate - checks whether queue has valid values or not.
func (q Queue) Validate(region string, targetList *TargetList) error {
	if q.ARN.region == "" {
		if !targetList.Exists(q.ARN.TargetID) {
			return &ErrARNNotFound{q.ARN}
		}
		return nil
	}

	if region != "" && q.ARN.region != region {
		return &ErrUnknownRegion{q.ARN.region}
	}

	if !targetList.Exists(q.ARN.TargetID) {
		return &ErrARNNotFound{q.ARN}