llvm/CodeGen/RDFGraph.h

679         Iterator &up() { Pos = DS.nextUp(Pos); return *this; }
680         Iterator &down() { Pos = DS.nextDown(Pos); return *this; }
683           assert(Pos >= 1);
684           return DS.Stack[Pos-1];
687           assert(Pos >= 1);
688           return &DS.Stack[Pos-1];
690         bool operator==(const Iterator &It) const { return Pos == It.Pos; }
691         bool operator!=(const Iterator &It) const { return Pos != It.Pos; }
698         // Pos-1 is the index in the StorageType object that corresponds to
701         unsigned Pos;