877     if (TheNeg->getOpcode() == Instruction::Sub) {  in NegateValue()
895 static bool ShouldBreakUpSubtract(Instruction *Sub) {  in ShouldBreakUpSubtract()  argument
897   if (match(Sub, m_Neg(m_Value())) || match(Sub, m_FNeg(m_Value())))   in ShouldBreakUpSubtract()
901   if (isa<UndefValue>(Sub->getOperand(1)))  in ShouldBreakUpSubtract()
906   Value *V0 = Sub->getOperand(0);  in ShouldBreakUpSubtract()
908       isReassociableOp(V0, Instruction::Sub, Instruction::FSub))  in ShouldBreakUpSubtract()
910   Value *V1 = Sub->getOperand(1);  in ShouldBreakUpSubtract()
912       isReassociableOp(V1, Instruction::Sub, Instruction::FSub))  in ShouldBreakUpSubtract()
914   Value *VB = Sub->user_back();  in ShouldBreakUpSubtract()
915   if (Sub->hasOneUse() &&  in ShouldBreakUpSubtract()
917        isReassociableOp(VB, Instruction::Sub, Instruction::FSub)))  in ShouldBreakUpSubtract()
925 static BinaryOperator *BreakUpSubtract(Instruction *Sub,  in BreakUpSubtract()  argument
932   Value *NegVal = NegateValue(Sub->getOperand(1), Sub, ToRedo);  in BreakUpSubtract()
933   BinaryOperator *New = CreateAdd(Sub->getOperand(0), NegVal, "", Sub, Sub);  in BreakUpSubtract()
934   Sub->setOperand(0, Constant::getNullValue(Sub->getType())); // Drop use of op.  in BreakUpSubtract()
935   Sub->setOperand(1, Constant::getNullValue(Sub->getType())); // Drop use of op.  in BreakUpSubtract()
936   New->takeName(Sub);  in BreakUpSubtract()
939   Sub->replaceAllUsesWith(New);  in BreakUpSubtract()
940   New->setDebugLoc(Sub->getDebugLoc());  in BreakUpSubtract()
2045   if (I->getOpcode() == Instruction::Sub) {  in OptimizeInst()
2115       cast<Instruction>(BO->user_back())->getOpcode() == Instruction::Sub)  in OptimizeInst()