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Commit ce677ef5 authored by Simon Pilgrim's avatar Simon Pilgrim
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[X86][AVX2] combineSetCCMOVMSK - handle all_of patterns for PMOVMSKB(PACKSSBW(LO(X), HI(X))) 

In the sign splat case, we can fold PMOVMSKB(PACKSSBW(LO(X), HI(X))) -> PMOVMSKB(BITCAST_v32i8(X)) without introducing a signmask + comparison (which unlike for any_of won't fold into a single TEST).
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