[llvm] [LSV] Merge contiguous chains across scalar types (PR #154069)

[Anshil Gandhi via llvm-commits]

gandhi56 wrote:

I added a comprehensive set of normalization tests in merge-vectors-complex.ll, functionality tests in merge-vectors.ll to ensure all checks are doing their job before deciding to merge loads/stores and finally introduced copy-metadata-loads-stores.ll for metadata preservation checks.

https://github.com/llvm/llvm-project/pull/154069