72 struct SpillPlacement::Node {  struct in SpillPlacement
74   BlockFrequency BiasN;
77   BlockFrequency BiasP;
82   int Value;
84   using LinkVector = SmallVector<std::pair<BlockFrequency, unsigned>, 4>;
88   LinkVector Links;
91   BlockFrequency SumLinkWeights;
94   bool preferReg() const {  in preferReg()
100   bool mustSpill() const {  in mustSpill()
109   void clear(BlockFrequency Threshold) {  in clear()
118   void addLink(unsigned b, BlockFrequency w) {  in addLink()
133   void addBias(BlockFrequency freq, BorderConstraint direction) {  in addBias()
151   bool update(const Node nodes[], BlockFrequency Threshold) {  in update()
180   void getDissentingNeighbors(SparseSet<unsigned> &List,  in getDissentingNeighbors()