[X86][Costmodel] Load/store i16 Stride=2 VF=32 interleaving costs
The only sched models that for cpu's that support avx2
but not avx512 are: haswell, broadwell, skylake, zen1-3
For load we have:
https://godbolt.org/z/q6GbK89br - for intels Block RThroughput: =18.0; for ryzens, Block RThroughput: <=7.0
So pick cost of 18.
For store we have:
https://godbolt.org/z/Yzfoo5TnW - for intels Block RThroughput: =8.0; for ryzens, Block RThroughput: <=4.0
So pick cost of 8.
I'm directly using the shuffling asm the llc produced,
without any manual fixups that may be needed
to ensure sequential execution.
Reviewed By: RKSimon
Differential Revision: https://reviews.llvm.org/D110507