[PATCH] D103407: [TTI] NFC: Change getNumberOfParts to return InstructionCost.

[Sander de Smalen via Phabricator via llvm-commits]

sdesmalen added a comment.

This change doesn't make much sense to me, `getNumberOfParts` returns how many pieces to split up the provided type. If the answer is unknown the value 0 is used for that, so there shouldn't be a reason why this would ever need to return Invalid.
Additionally, all current uses of this function are in the SLPVectorizer and the SystemZ target where vector types are fixed, so it should always be possible to split a type in a known number of parts.


Repository:
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  https://reviews.llvm.org/D103407/new/

https://reviews.llvm.org/D103407