[llvm] [LoopVectorize] Enable shuffle padding for masked interleaved accesses (PR #75329)

[David Green via llvm-commits]

davemgreen wrote:

Hello. Just to check - my understand was that we couldn't write back the same value to the missing elements as it would introduce a data race. Is that not correct any more? It might be very unlikely to cause problems in practice.

https://github.com/llvm/llvm-project/pull/75329