6510     uint64_t ZeroMask = IsAndN ? 255 : 0;  in getFauxShuffleMask()  local
6521       Mask.push_back(ByteBits == ZeroMask ? SM_SentinelZero : i);  in getFauxShuffleMask()
6684       APInt ZeroMask = APInt::getHighBitsSet(2 * NumBitsPerElt, NumBitsPerElt);  in getFauxShuffleMask()  local
6685       if ((!N0.isUndef() && !DAG.MaskedValueIsZero(N0, ZeroMask)) ||  in getFauxShuffleMask()
6686           (!N1.isUndef() && !DAG.MaskedValueIsZero(N1, ZeroMask)))  in getFauxShuffleMask()
7204   SmallBitVector ZeroMask(NumElems, false);  in EltsFromConsecutiveLoads()  local
7217       ZeroMask[i] = true;  in EltsFromConsecutiveLoads()
7228   assert((ZeroMask | UndefMask | LoadMask).count() == NumElems &&  in EltsFromConsecutiveLoads()
7236   if ((ZeroMask | UndefMask).count() == NumElems)  in EltsFromConsecutiveLoads()
7262     } else if (ZeroMask[i]) {  in EltsFromConsecutiveLoads()
7314         if (ZeroMask[i])  in EltsFromConsecutiveLoads()
9846   SDValue ZeroMask = DAG.getConstant(0x80, DL, MVT::i8);  in lowerVectorShuffleWithPSHUFB()  local
9856       PSHUFBMask[i] = ZeroMask;  in lowerVectorShuffleWithPSHUFB()
10134       APInt ZeroMask = APInt::getHighBitsSet(BitSize * 2, BitSize);  in matchVectorShuffleWithPACK()  local
10135       if ((N1.isUndef() || DAG.MaskedValueIsZero(VV1, ZeroMask)) &&  in matchVectorShuffleWithPACK()
10136           (N2.isUndef() || DAG.MaskedValueIsZero(VV2, ZeroMask))) {  in matchVectorShuffleWithPACK()
13107     const int ZeroMask = 0x80;  in lowerVectorShuffleAsBlendOfPSHUFBs()  local
13108     int V1Idx = M < Size ? M * Scale + i % Scale : ZeroMask;  in lowerVectorShuffleAsBlendOfPSHUFBs()
13109     int V2Idx = M < Size ? ZeroMask : (M - Size) * Scale + i % Scale;  in lowerVectorShuffleAsBlendOfPSHUFBs()
13111       V1Idx = V2Idx = ZeroMask;  in lowerVectorShuffleAsBlendOfPSHUFBs()
13115     V1InUse |= (ZeroMask != V1Idx);  in lowerVectorShuffleAsBlendOfPSHUFBs()
13116     V2InUse |= (ZeroMask != V2Idx);  in lowerVectorShuffleAsBlendOfPSHUFBs()
31848     unsigned ZeroMask = InsertPSMask & 0xF;  in combineTargetShuffle()  local
31851     if (((ZeroMask | (1u << DstIdx)) == 0xF) && !Op0.isUndef())  in combineTargetShuffle()
31856     if ((ZeroMask & (1u << DstIdx)) && !Op1.isUndef())  in combineTargetShuffle()