message: Fix deadness_analysis_test so the exit node of the control flow graph connects
  to the false output of the switch node.
diff: @@ -127,7 +127,8 @@ InductionVarInfo CreateInductionVariable(const Scope& root,
  Output loop_cond =
  ops::LoopCond(root.WithOpName(prefix + "/cond"), loop_cond_expr);
  ops::Switch latch(root.WithOpName(prefix + "/latch"), iv.output, loop_cond);
  - ops::internal::Exit exit(root.WithOpName(prefix + "/exit"), iv.output);
  + ops::internal::Exit exit(root.WithOpName(prefix + "/exit"),
  + latch.output_false);
  Output iv_next = ops::Add(root.WithOpName(prefix + "/ivnext"),
  latch.output_true, increment_by);
  Output next_iteration =
  @@ -191,7 +192,8 @@ DependentInductionVar CreateDependentLoopInvariantValue(
  value, frame_name);
  ops::Merge iv(root.WithOpName(prefix + "/iv"), {enter_value, enter_value});
  ops::Switch latch(root.WithOpName(prefix + "/latch"), iv.output, loop_cond);
  - ops::internal::Exit exit(root.WithOpName(prefix + "/exit"), iv.output);
  + ops::internal::Exit exit(root.WithOpName(prefix + "/exit"),
  + latch.output_false);
  Output next_iteration = ops::NextIteration(
  root.WithOpName(prefix + "/next_iteration"), latch.output_true);
  CHECK(root.graph()
  