[llvm] [AArch64][SVE][SelectionDAG] Improve codegen for SVE patterns sext(icmp) and zext(icmp) (PR #192052)

[Paul Walker via llvm-commits]

paulwalker-arm wrote:

This looks like two (possible three) separate combines.  Please can this be split into separate PRs? so their effect can be seen in isolation.

https://github.com/llvm/llvm-project/pull/192052