[PATCH] D99249: [PassManager] Run additional LICM before LoopRotate

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri added a comment.

In D99249#2662288 <https://reviews.llvm.org/D99249#2662288>, @lebedev.ri wrote:

> I'm not sure how to write proper interestingness test for this, but e.g. given this input F16057899: reduced.ll <https://reviews.llvm.org/F16057899> (bad example, in the end everything optimizes away)
> <...>
> Note how the `-licm -loop-rotate` causes `%sub.i.i` to be computed in-loop.
> Do tell if that isn't sufficient of an answer.

Or more visibly: https://godbolt.org/z/GzEbacs4K


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