Integrate LLVM at llvm/llvm-project@79bb915fb60b
Integrate LLVM at llvm/llvm-project@79bb915fb60b

Updates LLVM usage to match
[79bb915fb60b](https://github.com/llvm/llvm-project/commit/79bb915fb60b)

PiperOrigin-RevId: 460416534

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