[llvm] [LLVM][CodeGen][SVE] rev(whilelo(a, b)) -> whilehi(b, a). (PR #88294)

[Paul Walker via llvm-commits]

paulwalker-arm wrote:

It turns out the while instructions don't have infinite precision and thus the equality variants have different behaviour when a maximum/minimum integer is in place (generally resulting in an all true predicate when wrapping occurs), which make this transformation invalid.  I'll upload a new version with those patterns removed.

https://github.com/llvm/llvm-project/pull/88294