[llvm] [AArch64][SVE] Used fixed width vectorization for A510 and A520 (PR #132246)

[David Green via llvm-commits]

https://github.com/davemgreen approved this pull request.

LGTM, can you change the title to something like "[AArch64][SVE] Use FeatureUseFixedOverScalableIfEqualCost for A510 and A520". It is only when the scores are equal and the vectorizer has no reason to pick one vs the other that this will cause the vectorizer to pick fixed-width.

https://github.com/llvm/llvm-project/pull/132246