[llvm] [CodeGen] Expand unsupported interleave to shuffles (PR #210494)

[Kamlesh Kumar via llvm-commits]

kamleshbhalui wrote:

Hi @lukel97 ,
Can you please provide your thought on RISCV regressions.
After some analysis, I have created two issues https://github.com/llvm/llvm-project/issues/222938 and https://github.com/llvm/llvm-project/issues/222933
Can you share your thought on these two issues as well.
After getting rid of 2 way interleaving expand from selection dag builder there seems one regression for i1 types(vector_interleave2(<16xi1>, <16xi1>)).


https://github.com/llvm/llvm-project/pull/210494