914   Value *VB = Sub->user_back();  in ShouldBreakUpSubtract()
1900       while (Op->hasOneUse() && Op->user_back()->getOpcode() == Opcode &&  in EraseInst()
1902         Op = Op->user_back();  in EraseInst()
1946   Instruction *User = I->user_back();  in canonicalizeNegConstExpr()
2012          (isReassociableOp(I->user_back(), Instruction::Mul) ||  in OptimizeInst()
2013           isReassociableOp(I->user_back(), Instruction::Add)))) {  in OptimizeInst()
2056            !isReassociableOp(I->user_back(), Instruction::Mul))) {  in OptimizeInst()
2080            !isReassociableOp(I->user_back(), Instruction::FMul))) {  in OptimizeInst()
2102   if (BO->hasOneUse() && BO->user_back()->getOpcode() == Opcode) {  in OptimizeInst()
2106     if (BO->user_back() != BO &&  in OptimizeInst()
2107         BO->getParent() == BO->user_back()->getParent())  in OptimizeInst()
2108       RedoInsts.insert(BO->user_back());  in OptimizeInst()
2115       cast<Instruction>(BO->user_back())->getOpcode() == Instruction::Sub)  in OptimizeInst()
2118       cast<Instruction>(BO->user_back())->getOpcode() == Instruction::FSub)  in OptimizeInst()
2171         cast<Instruction>(I->user_back())->getOpcode() == Instruction::Add &&  in ReassociateExpression()
2177                cast<Instruction>(I->user_back())->getOpcode() ==  in ReassociateExpression()
2254       if (I.hasOneUse() && I.user_back()->getOpcode() == I.getOpcode())  in BuildPairMap()