   0  inline_call_ir_r <JitCode 'interp_w__Lock'>, I[$False], R[%r0] -> %r1
   8  -live- %r1
   8  getfield_gc_r_pure %r1, FieldDescr<pypy.module.thread.os_lock.Lock.inst_lock> -> %r0
  13  inline_call_ir_i <JitCode 'Lock.acquire'>, I[$True], R[%r0] -> %i0
  21  -live- %i0, %r1
  21  -live- %i0, %r1
  21  goto_if_not %i0, L1
  25  L2:
  25  ref_return %r1
  27  ---
  27  L1:
  27  goto L2
