[PATCH] D65803: [MVE] Don't try to unroll vectorised MVE loops

[Sam Parker via Phabricator via llvm-commits]

samparker added a comment.

Rather than for performance, I can't see how we can legally unroll a vectorized loops in the case of tail predication. I also don't know how we'd detect that a loop had been unrolled when we get to the conversion phase, so it seems like this is the only place where we can maintain correctness. And because we need this for legality, we can't rely on metadata...


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