[PATCH] D30871: Add forgetBlock in PredIteratorCache.

[Daniel Berlin via Phabricator via llvm-commits]

dberlin added a comment.

Hmmm, actually, i bet, for jump threading, the way it caches preds is slower than counting them repeatedly.
If it just cached the count, that would likely be fast, but i expect the copying is slower than the counting,.


https://reviews.llvm.org/D30871