[PATCH] D79162: [Analysis] TTI: Add CastContextHint for getCastInstrCost

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

The general idea of passing down information about the instruction makes sense.

The one thing I would say here is that we probably shouldn't pass down the "Instruction" from the vectorizer at all: in general, the cost computation doesn't know what sort of transforms the vectorizer is going to do, so any information computed from its operands/uses will be misleading in general.


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  https://reviews.llvm.org/D79162/new/

https://reviews.llvm.org/D79162