[llvm] [DebugInfo][LoopUnroll] Preserve DebugLocs on optimized cond branches (PR #110276)

[David Blaikie via llvm-commits]

dwblaikie wrote:

(did this get merged? The PR just shows "closed" - be good to mention which commit merged this, if it was merged, or why it wasn't if it wasn't)

https://github.com/llvm/llvm-project/pull/110276