Integrate LLVM at llvm/llvm-project@71a45e7c6328
Integrate LLVM at llvm/llvm-project@71a45e7c6328

Updates LLVM usage to match
[71a45e7c6328](https://github.com/llvm/llvm-project/commit/71a45e7c6328)

PiperOrigin-RevId: 368611924

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