[PATCH] D111220: [X86][LV][TTI][Costmodel] LoopVectorizer: don't use `TTI::isLegalMaskedGather()` hook, introduce `TTI::shouldUseMaskedGatherForVectorization()`

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added a comment.

How good is the gather/scatter scalarization at splitting vectorized geps? Doing pointer math on the vector unit (probably using a single splatted base pointer) and then having to extract every pointer is going to be pretty poor compared to scalarizing and using LEA op on x86.


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  https://reviews.llvm.org/D111220/new/

https://reviews.llvm.org/D111220