[PATCH] D158449: [IR]Add NumSrcElts param to is..Mask static function in ShuffleVectorInst.

[Philip Reames via Phabricator via llvm-commits]

reames added a comment.

Coming into this quite late, but I'm confused by the need for this API change.

Doesn't the existing ArrayRef::take_front API fulfill the same need?  If you need to consider a prefix of the mask, why not just take a reference to that prefix?


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  https://reviews.llvm.org/D158449/new/

https://reviews.llvm.org/D158449