Integrate LLVM at llvm/llvm-project@5da6d26896d1
Integrate LLVM at llvm/llvm-project@5da6d26896d1

Updates LLVM usage to match
[5da6d26896d1](https://github.com/llvm/llvm-project/commit/5da6d26896d1)

PiperOrigin-RevId: 418910152

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