Integrate LLVM at llvm/llvm-project@793b4b26039e
Integrate LLVM at llvm/llvm-project@793b4b26039e

Updates LLVM usage to match
[793b4b26039e](https://github.com/llvm/llvm-project/commit/793b4b26039e)

PiperOrigin-RevId: 372544965

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