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Commit c7bb3665 authored by Simon Pilgrim's avatar Simon Pilgrim
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[X86] SimplifyDemandedBitsForTargetNode - fold MOVMSK(YMM) -> MOVMSK(XMM) 

If we don't demand the upper elements of the 256-bit vector, then just perform as a 128-bit vector
parent 9d75ee1c
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