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

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

That's sort of out of scope for LCSSA, I think.  I mean, yes, the unreachable check is cheap, but if it comes up in practice we should just fix the pass pipeline to prune dead code more aggressively.


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

https://reviews.llvm.org/D57033