[clang] [llvm] [LLVM][PhaseOrdering] Run CSE after InstCombine has cleaned the result of vectorisation. (PR #120443)

[Nikita Popov via cfe-commits]

nikic wrote:

I'll comment in more detail another time, but here's the compile-time impact: https://llvm-compile-time-tracker.com/compare.php?from=0e324b3f953d62527690b1cb44d95fcb3ec0512c&to=d1735d35b42bd8b0cabb6c0f54e7972a91430f85&stat=instructions:u

https://github.com/llvm/llvm-project/pull/120443