Integrate LLVM at llvm/llvm-project@4c4f1ae93ea7
Integrate LLVM at llvm/llvm-project@4c4f1ae93ea7

Updates LLVM usage to match
[4c4f1ae93ea7](https://github.com/llvm/llvm-project/commit/4c4f1ae93ea7)

PiperOrigin-RevId: 380757767

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