Integrate LLVM at llvm/llvm-project@09f43c107fc7
Integrate LLVM at llvm/llvm-project@09f43c107fc7

Updates LLVM usage to match
[09f43c107fc7](https://github.com/llvm/llvm-project/commit/09f43c107fc7)

PiperOrigin-RevId: 418861840

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