596   if (match(V, m_Undef())) {  in collectSingleShuffleElements()
751   if (match(V, m_Undef())) {  in collectShuffleElements()
1222   if (!match(FirstIE->getOperand(0), m_Undef()))  in foldInsSequenceIntoSplat()
1263   if (!match(Op0, m_InsertElt(m_Undef(), m_Specific(X), m_ZeroInt())))  in foldInsEltIntoSplat()
1284   if (!Shuf || !match(Shuf->getOperand(1), m_Undef()) ||  in foldInsEltIntoIdentityShuffle()
1516   if (match(VecOp, m_Undef()) &&  in visitInsertElementInst()
1800   if (match(V, m_Undef()))  in evaluateInDifferentElementOrder()
2024   if (!match(Op0, m_OneUse(m_InsertElt(m_Undef(), m_Value(X),  in canonicalizeInsertSplat()
2026       !match(Op1, m_Undef()) || match(Mask, m_ZeroMask()) || IndexC == 0)  in canonicalizeInsertSplat()
2056   if (!match(Shuf.getOperand(1), m_Undef()) &&  in foldSelectShuffle()
2190       !match(Shuf.getOperand(1), m_Undef()) || !DestType->isIntOrIntVectorTy())  in foldTruncShuffle()
2229   if (!match(Shuf.getOperand(1), m_Undef()) || !Shuf.isIdentityWithExtract())  in narrowVectorSelect()
2244   if (!match(Cond, m_OneUse(m_Shuffle(m_Value(NarrowCond), m_Undef()))) ||  in narrowVectorSelect()
2267   if (FNeg0->hasOneUse() && match(Shuf.getOperand(1), m_Undef())) {  in foldFNegShuffle()
2342   if (!Shuf.isIdentityWithExtract() || !match(Op1, m_Undef()))  in foldIdentityExtractShuffle()
2500       match(X, m_Undef()) || match(Y, m_Undef()))  in foldIdentityPaddedShuffles()
2502   assert(match(Shuffle0->getOperand(1), m_Undef()) &&  in foldIdentityPaddedShuffles()
2503          match(Shuffle1->getOperand(1), m_Undef()) &&  in foldIdentityPaddedShuffles()
2586   if (match(LHS, m_BitCast(m_Value(X))) && match(RHS, m_Undef()) &&  in visitShuffleVectorInst()
2611     assert(!match(RHS, m_Undef()) &&  in visitShuffleVectorInst()
2617   if (match(LHS, m_Undef())) {  in visitShuffleVectorInst()
2658   if (match(RHS, m_Undef()) && canEvaluateShuffled(LHS, Mask)) {  in visitShuffleVectorInst()
2797     if (!match(LHSShuffle->getOperand(1), m_Undef()) && !match(RHS, m_Undef()))  in visitShuffleVectorInst()
2800     if (!match(RHSShuffle->getOperand(1), m_Undef()))  in visitShuffleVectorInst()
2823     if (match(RHS, m_Undef())) {  in visitShuffleVectorInst()
2881       if (match(RHS, m_Undef()))  in visitShuffleVectorInst()
2890           assert(match(RHSShuffle->getOperand(1), m_Undef()) &&  in visitShuffleVectorInst()