[PATCH] D30342: [SimplifyCFG] Do not split blocks if breaking a loop

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

Another option here would be to make SimplifyCFG insert a preheader for loops which don't have one.  That seems better in terms of canonicalization.


https://reviews.llvm.org/D30342