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

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

If LCSSA just doesn't care that it's creating dead references to variables instead of undefs, it would be faster to completely skip the check.  Otherwise, sure, that makes sense.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D57033/new/

https://reviews.llvm.org/D57033