   0  -live- %r0, %r1, %r2, %r3
   3  ref_guard_value %r0
   5  -live- %r0, %r1, %r2, %r3
   8  jit_merge_point $10, I[], R[%r0], F[], I[], R[%r1, %r2, %r3], F[]
  20  -live- %r1, %r2, %r3
  23  inline_call_r_r <JitCode 'GeneratorIterator._send_ex'>, R[%r1, %r2, %r3] -> %r0
  31  -live- %r0
  34  ref_return %r0
