const unsigned Space = SlotIndex::InstrDist/2;
assert((Space & 3) == 0 && "InstrDist must be a multiple of 2*NUM");
- IndexList::iterator startItr = prior(curItr);
+ IndexList::iterator startItr = std::prev(curItr);
unsigned index = startItr->getIndex();
do {
curItr->setIndex(index += Space);