Integrate LLVM at llvm/llvm-project@5acd9c49a85f
Integrate LLVM at llvm/llvm-project@5acd9c49a85f

Updates LLVM usage to match
[5acd9c49a85f](https://github.com/llvm/llvm-project/commit/5acd9c49a85f)

PiperOrigin-RevId: 430161204

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