[llvm] [AArch64][SelectionDAG] Fold SVE interleaves of splat vectors (PR #219146)

[Serval MARTINOT-LAGARDE via llvm-commits]

Serval6 wrote:

Thanks for the info. I confirm I have read big parts of the three documents: the LLVM AI Tool Use Policy, the Code-Review Policy, and the Developer Policy.

Note on AI tool usage: I used an AI assistant, Claude, to help draft/word the PR description. The code changes and testing were done and verified by myself.

https://github.com/llvm/llvm-project/pull/219146