efriedma added a comment.
Do we really need a dedicated LLVM intrinsic to make the pattern-matching work
here? It would be better if we could leverage
@llvm.experimental.vector.insert.nxv16i8.v16i8 or something like that.
Something along the lines of https://godbolt.org/z/Wz4azzKrP seems
bsmith created this revision.
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