lib/CodeGen/CGExpr.cpp

3719     // Idx = LowerBound ?: 0;
3720     if (auto *LowerBound = E->getLowerBound()) {
3722           EmitScalarExpr(LowerBound), IntPtrTy,
3723           LowerBound->getType()->hasSignedIntegerRepresentation());
3734       // Idx = LowerBound + Length - 1;
3739       auto *LowerBound = E->getLowerBound();
3741       if (LowerBound && LowerBound->isIntegerConstantExpr(ConstLowerBound, C)) {
3743         LowerBound = nullptr;
3747       else if (!LowerBound)
3750       if (Length || LowerBound) {
3752             LowerBound
3754                       EmitScalarExpr(LowerBound), IntPtrTy,
3755                       LowerBound->getType()->hasSignedIntegerRepresentation())
3766         if (Length && LowerBound) {