srv.nextProtoOnce.Do(srv.onceSetNextProtoDefaults)
	return srv.nextProtoErr
}

// setupHTTP2_Serve is called from (*Server).Serve and conditionally
// configures HTTP/2 on srv using a more conservative policy than
// setupHTTP2_ServeTLS because Serve is called after tls.Listen,
// and may be called concurrently. See shouldConfigureHTTP2ForServe.
//
// The tests named TestTransportAutomaticHTTP2* and

// Obviously args beginning with - are not safe (they look like flags).
// Less obviously, args beginning with @ are not safe (they look like
// GNU binutils flagfile specifiers, sometimes called "response files").
// To be conservative, we reject almost any arg beginning with non-alphanumeric ASCII.
// We accept leading . _ and / as likely in file system paths.
// There is a copy of this function in cmd/compile/internal/gc/noder.go.

      // only self-dependent conservatively, i.e., we do add dependencies
      // to/from unknown resource types. Currently, we don't have such cases and
      // there is no indication that we will need to support them in the future.
      LOG(WARNING) << "Self-dependent-only resource types are treated "
                      "conservatively for value-based side effects.";
    }

// size of input tensors. The exception is that ops whose cost is irrelevant to
// input sizes, such as tf.Shape and tf.Reshape, are whitelisted to have cheap
// cost. This cost analysis is expected to be used conservatively (eg. use a low
// threshold to decide whether a cost is cheap or expensive), as it might not be
// accurate in some cases.
//
class CostAnalysis {
 public:
  explicit CostAnalysis(

iris.arpa irish iron.museum iruma.saitama.jp is is-a-anarchist.com is-a-blogger.com is-a-bookkeeper.com is-a-bruinsfan.org is-a-bulls-fan.com is-a-candidate.org is-a-caterer.com is-a-celticsfan.org is-a-chef.com is-a-chef.net is-a-chef.org is-a-conservative.com is-a-cpa.com is-a-cubicle-slave.com is-a-democrat.com is-a-designer.com is-a-doctor.com is-a-financialadvisor.com is-a-geek.com is-a-geek.net is-a-geek.org is-a-green.com is-a-guru.com is-a-hard-worker.com is-a-hunter.com is-a-knight.org is-a-landscaper.com...

		case *ast.Ident:
			if decl, ok := findDecl(arg).(*ast.CallExpr); ok {
				chanDecl = decl
			}
		case *ast.CallExpr:
			// Only signal.Notify(make(chan os.Signal), os.Interrupt) is safe,
			// conservatively treat others as not safe, see golang/go#45043
			if isBuiltinMake(pass.TypesInfo, arg) {
				return
			}
			chanDecl = arg
		}
		if chanDecl == nil || len(chanDecl.Args) != 1 {
			return
		}

// and 32 trailing zero bits, y should have less than 30 significant bits.
//
//	y < 1<<30  -> floor(x*4/Pi) < 1<<30 -> x < (1<<30 - 1) * Pi/4
//
// So, conservatively we can take x < 1<<29.
// Above this threshold Payne-Hanek range reduction must be used.
const reduceThreshold = 1 << 29

// trigReduce implements Payne-Hanek range reduction by Pi/4

// RUN: tf-opt %s -tf-device-mark-input-output-aliases | FileCheck %s

// The following tests check if the aliasing pairs are conservatively marked
// correctly. In the following tests tf_device.cluster_func has inputs
// coming from ReadVariableOp and outputs written to a resource using
// AssignVariableOp. If a pair of input-output (say input at index `a` and
// output at index `b`) read and write to the same resource, then those
// input-output pairs alias each other.

  // Converts from read/write state that relates ops with the same parallel id
  // to a set of last accesses for use with other parallel ids. Reads/writes
  // between parallel ids are conservatively approximated as writes.
  absl::flat_hash_set<Operation*> GetLastWrites(ResourceId resource_id);

  // Sets the read/write state for ops within the same parallel id.
  void SetLastWrites(ResourceId resource_id,

// interaction are considered unsafe. For example, clicking on a "javascript:"
// link can immediately trigger JavaScript code execution.
//
// This filter conservatively assumes that all schemes other than the following
// are unsafe:
//   - http:   Navigates to a new website, and may open a new window or tab.
//     These side effects can be reversed by navigating back to the