[PATCH] D115238: [LoopInterchange] Remove a limitation in legality

[Bardia Mahjour via Phabricator via llvm-commits]

bmahjour added a comment.

> Right now we split at the branch instruction of for2, and we duplicate %j.next = add nuw nsw i64 %j, 1 and %exitcond = icmp eq i64 %j, 99 into for2.split which becomes the new outer latch. Instructions in the original inner latch stay where they are. Hence the limitation can be removed.

Do we check to make sure duplicating instructions is safe (eg we are not duplicating side effects, etc)?


Repository:
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  https://reviews.llvm.org/D115238/new/

https://reviews.llvm.org/D115238