[PATCH] D138872: [InstCombine] canonicalize trunc + insert as bitcast + shuffle, part 1

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri added a comment.

Looking into follow-ups, it really seems like there should be part 0 without trunc handling.
If not, could you please explain why we must see a trunc?


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  https://reviews.llvm.org/D138872/new/

https://reviews.llvm.org/D138872