[PATCH] D92754: [LoopIdiom] 'left-shift until bittest' idiom: support rewriting loop as countable, allow extra cruft
Craig Topper via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Tue Dec 22 12:37:42 PST 2020
craig.topper added a comment.
I think this makes sense.
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Comment at: llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp:2145
+ // The rewrite is considered to be unprofitable iff and only iff
+ // the intrinsic/shift we'll is not cheap. Note that we are okay with *just*
+ // making the loop countable, even if nothing else changes.
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I think there's something missing between "we'll" and "is"?
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Comment at: llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp:2199
+ // Step 3: Adjust the successor basic block to recieve the computed
+ // recurrence's final value instead of the recurrence itself..
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There's an extra period at the end of this line.
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https://reviews.llvm.org/D92754
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