code: def _create_scalar_add():
      ifm = relay.var("x", shape=(1, 5, 4, 3), dtype="int8")
      ifm2 = relay.const(np.ones((1, 1, 1, 1)), dtype="int8")
      add = test_infra.make_ethosu_binary_elementwise(
          ifm,
          ifm2,
          ifm_channels=3,
          ifm2_channels=1,
          operator_type="ADD",
          ofm_dtype="int8",
      )
      func = relay.Function(relay.analysis.free_vars(add), add)
      return func
  
file_path: tvm/tests/python/contrib/test_ethosu/cascader/test_integration.py
imports: import pytest
  import numpy
  import tvm
  from tvm import relay
  from tvm.relay.backend.contrib.ethosu.codegen import _create_cascader
  from tvm.relay.backend.contrib.ethosu.tir.compiler import _lower_to_tir
  from tvm.contrib.ethosu.cascader import MemoryRegion, EthosuDeviceConfig
  from ..None import infra
  from .None import infra
label_desc: Use image node_id 5 for calling a global function with example usage: _create_scalar_add() and returns: func