[PATCH] D29092: PR31729: [GVNHoist] Don't hoist unsafe scalars at -Oz

[Daniel Berlin via Phabricator via llvm-commits]

dberlin added a comment.

See https://reviews.llvm.org/D8688#a1aa52c6

computeBarriers, for a way to compute the barriers once and be able to constant time check whether they are in the way.
(since you have dfs numbers for the instructions)


https://reviews.llvm.org/D29092