Integrate LLVM at llvm/llvm-project@c8e087082927
Integrate LLVM at llvm/llvm-project@c8e087082927

Updates LLVM usage to match
[c8e087082927](https://github.com/llvm/llvm-project/commit/c8e087082927)

PiperOrigin-RevId: 450576923

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