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Commit 2a419a0b authored by Simon Pilgrim's avatar Simon Pilgrim
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[X86][SSE] combineX86ShuffleChain - check if we're blending with zero into already zero elements 

Add a SelectionDAG::MaskedElementsAreZero helper that wraps SelectionDAG::MaskedValueIsZero testing for entirely zero vector elements
parent af870e11
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