code: def test_no_anchor_block():
      inp = te.placeholder((10,), name="input")
      out = topi.nn.relu(inp + 1.0)
      mod = tvm.IRModule()
      mod["main"] = te.create_prim_func([inp, out])
  
      assert find_anchor_block(mod) is None
  
file_path: tvm/tests/python/tir-analysis/test_tir_analysis_stmt_finding.py
imports: import pytest
  import tvm
  from tvm import te, topi
  from tvm.meta_schedule.testing.te_workload import conv2d_winograd_nhwc, matmul
  from tvm.tir.analysis import find_anchor_block
label_desc: Use image node_id 3 for calling a global function with example usage: test_no_anchor_block() without return types