[PATCH] D144760: [InstCombine] use demanded vector elements to eliminate partially redundant instructions

[Noah Goldstein via Phabricator via llvm-commits]

goldstein.w.n accepted this revision.
goldstein.w.n added a comment.
This revision is now accepted and ready to land.

LGTM. (note i'm not maintainer so maybe sit a day or so incase anyone else wants to way in).


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