Integrate LLVM at llvm/llvm-project@57dfa12e4ca8
Integrate LLVM at llvm/llvm-project@57dfa12e4ca8

Updates LLVM usage to match
[57dfa12e4ca8](https://github.com/llvm/llvm-project/commit/57dfa12e4ca8)

PiperOrigin-RevId: 390115039

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