[llvm-branch-commits] [llvm] release/23.x: [ARM][MVE] Match canonical saturating negation patterns (#213085) (PR #213699)

[Douglas Yung via llvm-branch-commits]

dyung wrote:

Is this a regression fix? If not, we are not accepting backports of just general improvements to the release branch I believe.

https://github.com/llvm/llvm-project/pull/213699