Integrate LLVM at llvm/llvm-project@558d9e82283e
Integrate LLVM at llvm/llvm-project@558d9e82283e

Updates LLVM usage to match
[558d9e82283e](https://github.com/llvm/llvm-project/commit/558d9e82283e)

PiperOrigin-RevId: 381952672

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