[llvm-branch-commits] [llvm] [AArch64][SME] Avoid ZA save state changes in loops in MachineSMEABIPass (PR #149065)

[Benjamin Maxwell via llvm-branch-commits]

MacDue wrote:

Note: This patch is a minor improvement to placing saves/restores. For more complex programs, we will need to propagate required ZA states through blocks with "no preference" to make better decisions. 

https://github.com/llvm/llvm-project/pull/149065