[llvm] [CodeGen] Avoid sinking vector comparisons during CodeGenPrepare (PR #113158)

[David Green via llvm-commits]

https://github.com/davemgreen commented:

Can you add these two tests too: https://godbolt.org/z/G1Ma7Gd9v. They are simpler and don't involve scalarization of the predicate (which will hopefully be rare).

https://github.com/llvm/llvm-project/pull/113158