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[X86][Costmodel] Load/store i32/f32 Stride=3 VF=16 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/5fqrh4qqo - for intels `Block RThroughput: =14.0`; for ryzens, `Block RThroughput: <=12.0` So pick cost of `14`. For store we have: https://godbolt.org/z/5fqrh4qqo - for intels `Block RThroughput: =22.0`; for ryzens, `Block RThroughput: <=16.0` So pick cost of `22`. 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/D111022
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