message: Create a config for experimenting with MLIR.
diff: @@ -431,6 +431,13 @@ config_setting(
  values = {"cpu": "x64_windows"},
  )
  +# This flag enables experimental MLIR support.
  +config_setting(
  + name = "with_mlir_support",
  + values = {"define": "with_mlir_support=true"},
  + visibility = ["//visibility:public"],
  +)
  +
  # DO NOT ADD ANY NEW EXCEPTIONS TO THIS LIST!
  # Instead, please use public APIs or public build rules TF provides.
  # If you need functionality that is not exposed, we will work with you to expand our public APIs.
  