Update InstCombineSelect.cpp

Co-authored-by: Yingwei Zheng <[email protected]>

Author: AZero13

llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp

@@ -1168,7 +1168,6 @@ static Value *canonicalizeSaturatedAddSigned(ICmpInst *Cmp, Value *TVal,
         APInt::getSignedMaxValue(Cmp1->getType()->getScalarSizeInBits());
 
     // For SGE, try to flip to SGT to normalize the comparison constant.
-    const APInt *FlippedC = nullptr;
     if (Pred == ICmpInst::ICMP_SGE) {
       if (auto Flipped = getFlippedStrictnessPredicateAndConstant(
               Pred, cast<Constant>(Cmp1))) {