[llvm-branch-commits] [llvm] [DTU] fix dominator tree update eliding reachable nodes (PR #177683)

[Mircea Trofin via llvm-branch-commits]

mtrofin wrote:

I tried. The inliner bit is needed so we can start with a valid DT and then inject new nodes. We could do manual edits, but this (via inliner) seems simpler.

The CFG of the "caller" needs a bit of complexity so the DT update doesn't just "bail out" and recompute from the beginning.

https://github.com/llvm/llvm-project/pull/177683