+ // Synthetic subreg indices that aren't contiguous (for instance ARM
+ // register tuples) don't have a bit range, so it's OK to let
+ // B->Offset == -1. For the other cases, accumulate the offset and set
+ // the size here. Only do so if there is no offset yet though.
+ if ((Offset != (uint16_t)-1 && A->Offset != (uint16_t)-1) &&
+ (B->Offset == (uint16_t)-1)) {
+ B->Offset = Offset + A->Offset;
+ B->Size = A->Size;
+ }
+ return (Ins.second || Ins.first->second == B) ? nullptr
+ : Ins.first->second;