[PATCH] D103144: [X86][Costmodel] Load/store v2i16 VF=2 interleaving costs

Thu May 27 13:31:24 PDT 2021

lebedev.ri added a comment.

In D103144#2784747 <https://reviews.llvm.org/D103144#2784747>, @lebedev.ri wrote:

> In D103144#2784735 <https://reviews.llvm.org/D103144#2784735>, @RKSimon wrote:
>
>> In D103144#2783028 <https://reviews.llvm.org/D103144#2783028>, @lebedev.ri wrote:
>>
>>> Sidenote, i'm still unsure whether we should specify that Zen 3 has `FeatureFastVariableShuffle`.
>>> Byte-wise variable shuffle is fast, but some are ucoded.
>>
>> Yes, in hindsight this feature flag needs splitting into FeatureFastVariableCrossLaneShuffle + FeatureFastVariablePerLaneShuffle,
>
> Hmm. Let me look into that first then, right now :)

Done, D103274 <https://reviews.llvm.org/D103274>.

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D103144/new/

https://reviews.llvm.org/D103144