Integrate LLVM at llvm/llvm-project@b927aa69bf2f
Integrate LLVM at llvm/llvm-project@b927aa69bf2f

Updates LLVM usage to match
[b927aa69bf2f](https://github.com/llvm/llvm-project/commit/b927aa69bf2f)

PiperOrigin-RevId: 412442494

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