[X86][Costmodel] Load/store i32/f32 Stride=4 VF=4 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/avq1oz98W - for intels `Block RThroughput: =8.0`; for ryzens, `Block RThroughput: =4.0` So could pick cost of `8`. For store we have: https://godbolt.org/z/89PGMc1qs - for intels `Block RThroughput: =6.0`; for ryzens, `Block RThroughput: <=6.0` So we could pick cost of `6`. 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/D111061
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