[PATCH] D57033: [SSAUpdater] Handle case with single available value faster.

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

SSAUpdater has code to insert undef in certain cases.  Can you prove those cases don't apply to all callers of GetValueAtEndOfBlock?


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  https://reviews.llvm.org/D57033/new/

https://reviews.llvm.org/D57033