[PATCH] D130618: [AArch64][LoopVectorize] Enable tail-folding of simple loops on neoverse-v1

[Dave Green via Phabricator via llvm-commits]

dmgreen added a comment.

Thanks, a threshold of 15 will certainly help mitigate some of the issues in common cases. The results I have are still not looking great in places, but like we discussed some of this will be dependant on alignment and other issues like multiple ir instructions becoming a single aarch64 instruction. And there are certainly cases where this is making improvements, even if it still makes me nervous.

On a more technical note I don't think this works without setting -sve-tail-folding=default as nothing will set NeedsDefault.


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https://reviews.llvm.org/D130618