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Commit c909dddd authored by Simon Pilgrim's avatar Simon Pilgrim
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[CostModel][X86] Improve accuracy of vXi64 vector non-uniform shift costs on AVX2+ targets 

rG1ad4f887 incorrectly assumed that vXi64 non-uniform shifts were slow like vXi32 were - but llvm-mca (+Agner) both confirm that Haswell/Broadwell are full rate.
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