   0  -live- %r0, %r1, %r2, %r3
   0  ref_guard_value %r0
   2  -live- %r0, %r1, %r2, %r3
   2  jit_merge_point $3, I[], R[%r0], F[], I[], R[%r1, %r2, %r3], F[]
  14  -live- %r1, %r2, %r3
  14  inline_call_r_r <JitCode 'GeneratorIterator._send_ex'>, R[%r1, %r2, %r3] -> %r0
  22  -live- %r0
  22  ref_return %r0
