[llvm] [LoadStoreVectorizer] Support vectorization of mixed-type contiguous accesses (PR #177908)

[Drew Kersnar via llvm-commits]

dakersnar wrote:

@gandhi56 anything else I can clarify? There's a few key unresolved threads from myself above that are needed to get this into a good state, but I think we're getting close.

Also, wanted to call this out now, once we have this in a good state I would love if you'd allow me a couple business days to test this internally at NVIDIA. Our internal tests could help catch some issues we didn't think about.

https://github.com/llvm/llvm-project/pull/177908