444           Idx = PoisonValue::get(Ty);  in visitExtractElementInst()
549           return replaceInstUsesWith(EI, PoisonValue::get(EI.getType()));  in visitExtractElementInst()
647     if (isa<PoisonValue>(ScalarOp)) {  // inserting poison into vector.  in collectSingleShuffleElements()
783         PermittedRHS ? PoisonValue::get(PermittedRHS->getType()) : V, nullptr);  in collectShuffleElements()
1263   PoisonValue *PoisonVec = PoisonValue::get(VecTy);  in foldInsSequenceIntoSplat()
1486         Values[I] = PoisonValue::get(InsElt.getType()->getElementType());  in foldConstantInsEltIntoShuffle()
1636     Constant *NewUndef = isa<PoisonValue>(VecOp) ? PoisonValue::get(VecTy)  in visitInsertElementInst()
1708             LR.second = PoisonValue::get(LR.first->getType());  in visitInsertElementInst()
1924   if (isa<PoisonValue>(V))  in evaluateInDifferentElementOrder()
1925     return PoisonValue::get(FixedVectorType::get(EltTy, Mask.size()));  in evaluateInDifferentElementOrder()
1934     return ConstantExpr::getShuffleVector(C, PoisonValue::get(C->getType()),  in evaluateInDifferentElementOrder()
2207   PoisonValue *PoisonVec = PoisonValue::get(Shuf.getType());  in canonicalizeInsertSplat()
2780   if (match(SVI.getShuffleMask(), m_ZeroMask()) && !isa<PoisonValue>(RHS))  in visitShuffleVectorInst()
2781     return replaceOperand(SVI, 1, PoisonValue::get(RHS->getType()));  in visitShuffleVectorInst()
3102         if (eltMask >= (int)LHSOp0Width && isa<PoisonValue>(LHSOp1))  in visitShuffleVectorInst()
3151       newRHS = PoisonValue::get(newLHS->getType());  in visitShuffleVectorInst()