[llvm] [GlobalISel]: G_UNMERGE_VALUES for vectors with different element sizes (PR #133335)

[Jay Foad via llvm-commits]

jayfoad wrote:

> Yes, that's what the current version of this PR tries to do.

OK, sounds good, but then please update the description. It's a bit misleading to say the patch **rejects** different source and destination vector elements for G_UNMERGE_VALUES.

https://github.com/llvm/llvm-project/pull/133335