[PATCH] D111031: [WIP][X86][Costmodel] Load/store i64/f64 Stride=3 VF=16 interleaving costs

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri added a comment.

In D111031#3039005 <https://reviews.llvm.org/D111031#3039005>, @RKSimon wrote:

> We are quite limited - even adding all xmm0 to the llvm-mca asm capture (~{xmm0} etc.) has very little effect - short of hand coding something, I think what you have here is at least a realistic magnitude vaue.

Right.

> I'm happy to accept this if you want.

Hmm, what if we omit the epilogue stores in the load case: https://godbolt.org/z/43ao6qYvK -- does load interleaving cost of `18` seem more/less realistic?
It would be good to also ignore the prologue loads, since we'll cost them twice

And likewise for interleaved store case: https://godbolt.org/z/1EjY3fqPG -- does interleaving store cost of `18` seem more/less realistic?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D111031/new/

https://reviews.llvm.org/D111031