   0  -live- %f0
   3  goto_if_not_float_eq %f0, $0.0, L1
   8  float_return $0.0
  10  ---
  10  L1:
  10  -live- %f0
  13  goto_if_not_float_ne %f0, %f0, L2
  18  float_return $nan
  20  ---
  20  L2:
  20  residual_call_irf_f $<* fn copysign>, I[], R[], F[$1.0, %f0], <CallDescr(ff) EF=0> -> %f0
  30  float_return %f0
