[PATCH] D92385: [ARM] Add a pass that re-arranges blocks when there is a backwards WLS branch

[Sjoerd Meijer via Phabricator via llvm-commits]

SjoerdMeijer added a comment.

I have some high-level questions:

- Are we fighting another optimisations here, some sort of loop-rotate or is this just MBP reshulffling blocks in a way that is not good for us?
- I know we don't nest WLSTPs for profitability reasons, but in theory we could. Not sure we need to check this though. But in general my impression is that some more test can be added, but perhaps you were still working on that.
- I am wondering if some cost-modeling is required. For example, if the iteration count is very low, would that change things?


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https://reviews.llvm.org/D92385