Integrate LLVM at llvm/llvm-project@50df5f24dc33
Integrate LLVM at llvm/llvm-project@50df5f24dc33

Updates LLVM usage to match
[50df5f24dc33](https://github.com/llvm/llvm-project/commit/50df5f24dc33)

PiperOrigin-RevId: 337292894

google-research/structured-additive-IR,google-research/structured-additive-IR