[PATCH] D105994: [SVE] Add folds for sign and zero extends of vscale

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

I think you might need to be a bit more careful to justify these transforms.

LangRef says "If the result value does not fit in the result type, then the result is a poison value."  But does that mean the sign bit is guaranteed to be zero?


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https://reviews.llvm.org/D105994