Integrate LLVM at llvm/llvm-project@85f08c4197ae
Integrate LLVM at llvm/llvm-project@85f08c4197ae

Updates LLVM usage to match
[85f08c4197ae](https://github.com/llvm/llvm-project/commit/85f08c4197ae)

PiperOrigin-RevId: 487676095

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