   0  residual_call_ir_i $<* fn ccall_tcgetpgrp__Signed>, I[%i0], R[], <CallDescr(i) EF=7> -> %i0
   8  -live- %i0
  11  inline_call_ir_i <JitCode 'handle_posix_error__tcgetpgrp'>, I[%i0], R[$<* struct rpy_string>] -> %i0
  19  -live- %i0
  22  int_return %i0
