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Commit def62697 authored by Simon Pilgrim's avatar Simon Pilgrim
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[CostModel][X86] Improve accuracy of 256-bit non-uniform vector shifts on AVX1 

Determined from llvm-mca analysis, AVX1 capable targets have a higher throughput for VPBLENDVB and shuffle ops, making it cheaper to perform shift+shuffle/select shift patterns.
parent 8e83ff58
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