code: def test_op_ptx_ldmatrix():
      buffer_shared = tir.decl_buffer(
          [16, 16], "float16", scope="shared"
      )
      buffer_local = tir.decl_buffer([8], "float16", scope="local")
      expr = tir.ptx_ldmatrix(
          "float16",
          False,
          4,
          ".b16",
          buffer_local.data,
          0,
          buffer_shared.data,
          0,
      )
      assert expr.op.name == "tir.ptx_ldmatrix"
  
imports: import tvm
  import tvm.testing
  from tvm import tir
label_desc: Use image node_id 24 for calling a global function with example usage: test_op_ptx_ldmatrix() without return types