code: def test_shfl(self, dtype):
      # strictly speaking this function is invalid in Python (see the
      # discussion in cupy/cupy#5340), but it serves for our purpose
      @jit.rawkernel()
      def f(a, b):
          laneId = jit.threadIdx.x & 0x1F
          if laneId == 0:
              value = a
          value = jit.shfl_sync(0xFFFFFFFF, value, 0)
          b[laneId] = value
  
      a = dtype(100)
      b = cupy.empty((32,), dtype=dtype)
      f[1, 32](a, b)
      assert (b == a * cupy.ones((32,), dtype=dtype)).all()
  
imports: import numpy
  import pytest
  import cupy
  from cupyx import jit
  from cupy import testing
  from cupy.cuda import device
  from cupy.cuda import runtime
label_desc: Use image node_id 39 for calling the TestRaw obj's underlying member method code with example usage: obj.test_shfl(dtype) without return types