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Commit 3b84b6f1 authored by Simon Pilgrim's avatar Simon Pilgrim
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[CostModel][X86] Add test coverage for 'concat subvector' style shuffles 

Shows 2 major issues:
 - SSE should be free as it splits everything to 128-bit
 - Negative costs for 128 -> 512 concat shuffles
parent 169824ba
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