code: def test_device_function_template_recursion(self):
      @jit.rawkernel()
      def f(x, y):
          tid = jit.threadIdx.x
          y[tid] = x[tid]
          jit.syncthreads()
          g(1)(y)
  
      def g(step):
          @jit.rawkernel(device=True)
          def f(x):
              if step < 256:
                  tid = jit.threadIdx.x
                  if tid % (step * 2) == 0:
                      x[tid] += x[tid + step]
                      jit.syncthreads()
                      g(step * 2)(x)
  
          return f
  
      x = testing.shaped_random((256,), dtype=numpy.int32, seed=0)
      y = testing.shaped_random((256,), dtype=numpy.int32, seed=1)
      f((1,), (256,), (x, y))
      assert y[0] == x.sum()
  
file_path: cupy/tests/cupyx_tests/jit_tests/test_device_function.py
imports: import unittest
  import numpy
  import pytest
  import cupy
  from cupyx import jit
  from cupy import testing
label_desc: Use image node_id 4 for calling the TestDeviceFunction obj's underlying member method code with example usage: obj.test_device_function_template_recursion() and returns: f