Integrate LLVM at llvm/llvm-project@de54bcc54c61
Integrate LLVM at llvm/llvm-project@de54bcc54c61

Updates LLVM usage to match
[de54bcc54c61](https://github.com/llvm/llvm-project/commit/de54bcc54c61)

PiperOrigin-RevId: 469615174

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