[llvm] [DirectX] Add support for Raw Buffer Loads and Stores for scalars and vectors of doubles and i64s in SM6.2 and earlier (PR #146627)

[Sarah Spall via llvm-commits]

spall wrote:

> The `BufferStoreInt64.ll` and `BufferStoreDouble.ll` tests were both updated, but there were no load tests that were updated for these two cases? Is that ok?

The Store tests were updated because of a new ShuffleVector generated, but the Load case didn't have any new instructions generated in all cases.

https://github.com/llvm/llvm-project/pull/146627