8233     uint64_t ZeroMask = IsAndN ? 255 : 0;  in getFauxShuffleMask()  local
8244       Mask.push_back(ByteBits == ZeroMask ? SM_SentinelZero : i);  in getFauxShuffleMask()
8465       APInt ZeroMask = APInt::getHighBitsSet(2 * NumBitsPerElt, NumBitsPerElt);  in getFauxShuffleMask()  local
8467            !DAG.MaskedValueIsZero(N0, ZeroMask, EltsLHS, Depth + 1)) ||  in getFauxShuffleMask()
8469            !DAG.MaskedValueIsZero(N1, ZeroMask, EltsRHS, Depth + 1)))  in getFauxShuffleMask()
9208   APInt ZeroMask = APInt::getZero(NumElems);  in EltsFromConsecutiveLoads()  local
9225       ZeroMask.setBit(i);  in EltsFromConsecutiveLoads()
9244   assert((ZeroMask.countPopulation() + UndefMask.countPopulation() +  in EltsFromConsecutiveLoads()
9251   if ((ZeroMask.countPopulation() + UndefMask.countPopulation()) == NumElems)  in EltsFromConsecutiveLoads()
9299     } else if (ZeroMask[i]) {  in EltsFromConsecutiveLoads()
9342     if (!ZeroMask)  in EltsFromConsecutiveLoads()
9355           int Offset = ZeroMask[i] ? NumMaskElts : 0;  in EltsFromConsecutiveLoads()
9409   if (ZeroMask.isZero() && isPowerOf2_32(NumElems) && Subtarget.hasAVX() &&  in EltsFromConsecutiveLoads()
11059   APInt ZeroMask = APInt::getZero(NumElems);  in LowerBUILD_VECTOR()  local
11076       ZeroMask.setBit(i);  in LowerBUILD_VECTOR()
11095     APInt UndefOrZeroMask = UndefMask | ZeroMask;  in LowerBUILD_VECTOR()
11118   unsigned NumZero = ZeroMask.countPopulation();  in LowerBUILD_VECTOR()
11910         APInt &ZeroMask = ExpectedIdx < Size ? ZeroV1 : ZeroV2;  in isTargetShuffleEquivalent()  local
11911         ZeroMask.setBit(BitIdx);  in isTargetShuffleEquivalent()
12068   SDValue ZeroMask = DAG.getConstant(0x80, DL, MVT::i8);  in lowerShuffleWithPSHUFB()  local
12078       PSHUFBMask[i] = ZeroMask;  in lowerShuffleWithPSHUFB()
12565       APInt ZeroMask = APInt::getHighBitsSet(NumSrcBits, NumPackedBits);  in matchShuffleWithPACK()  local
12566       if ((N1.isUndef() || IsZero1 || DAG.MaskedValueIsZero(N1, ZeroMask)) &&  in matchShuffleWithPACK()
12567           (N2.isUndef() || IsZero2 || DAG.MaskedValueIsZero(N2, ZeroMask))) {  in matchShuffleWithPACK()
15883     const int ZeroMask = 0x80;  in lowerShuffleAsBlendOfPSHUFBs()  local
15884     int V1Idx = M < Size ? M * Scale + i % Scale : ZeroMask;  in lowerShuffleAsBlendOfPSHUFBs()
15885     int V2Idx = M < Size ? ZeroMask : (M - Size) * Scale + i % Scale;  in lowerShuffleAsBlendOfPSHUFBs()
15887       V1Idx = V2Idx = ZeroMask;  in lowerShuffleAsBlendOfPSHUFBs()
15891     V1InUse |= (ZeroMask != V1Idx);  in lowerShuffleAsBlendOfPSHUFBs()
15892     V2InUse |= (ZeroMask != V2Idx);  in lowerShuffleAsBlendOfPSHUFBs()
39739     unsigned ZeroMask = InsertPSMask & 0xF;  in canonicalizeShuffleWithBinOps()  local
39740     if (ZeroMask != 0)  in canonicalizeShuffleWithBinOps()
40336     unsigned ZeroMask = InsertPSMask & 0xF;  in combineTargetShuffle()  local
40339     if (((ZeroMask | (1u << DstIdx)) == 0xF) && !Op0.isUndef())  in combineTargetShuffle()
40344     if ((ZeroMask & (1u << DstIdx)) && !Op1.isUndef())  in combineTargetShuffle()
51875     APInt ZeroMask = APInt::getHighBitsSet(NumSrcEltBits, NumSrcEltBits / 2);  in combineZext()  local
51876     if ((N00.isUndef() || DAG.MaskedValueIsZero(N00, ZeroMask)) &&  in combineZext()
51877         (N01.isUndef() || DAG.MaskedValueIsZero(N01, ZeroMask))) {  in combineZext()