[PATCH] D100684: [X86][CostModel] X86TTIImpl::getMemoryOpCost(): rewrite vector handling again

Wed May 12 07:54:29 PDT 2021

ABataev added a comment.

In D100684#2754163 <https://reviews.llvm.org/D100684#2754163>, @lebedev.ri wrote:

> Thank you for replying!
>
> In D100684#2754152 <https://reviews.llvm.org/D100684#2754152>, @RKSimon wrote:
>
>> IIRC the need for those interleaved costs was because we couldn't determine accurate 'lane crossing' vs 'non lane crossing' general shuffle costs - now that we have access to the shuffle mask it might be possible to recognise these a little better.
>
> So the comment is that i should first try to costmodel generic shuffles? (`X86TTIImpl::getShuffleCost()`)

I have initial patch for the shuffles D100486 <https://reviews.llvm.org/D100486>

Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D100684/new/

https://reviews.llvm.org/D100684