Integrate LLVM at llvm/llvm-project@393581d8a5cb
Integrate LLVM at llvm/llvm-project@393581d8a5cb

Updates LLVM usage to match
[393581d8a5cb](https://github.com/llvm/llvm-project/commit/393581d8a5cb)

PiperOrigin-RevId: 401429138

tensorflow/runtime,tensorflow/runtime,tensorflow/runtime,tensorflow/runtime