-template<class GraphT>
-typename GraphT::NodeType* Eval(DominatorTreeBase<typename GraphT::NodeType>& DT,
- typename GraphT::NodeType *V) {
- typename DominatorTreeBase<typename GraphT::NodeType>::InfoRec &VInfo =
- DT.Info[V];
-#if !BALANCE_IDOM_TREE
- // Higher-complexity but faster implementation
- if (VInfo.Ancestor == 0)
- return V;
- Compress<GraphT>(DT, V);
- return VInfo.Label;
-#else
- // Lower-complexity but slower implementation
- if (VInfo.Ancestor == 0)
- return VInfo.Label;
- Compress<GraphT>(DT, V);
- GraphT::NodeType* VLabel = VInfo.Label;
-
- GraphT::NodeType* VAncestorLabel = DT.Info[VInfo.Ancestor].Label;
- if (DT.Info[VAncestorLabel].Semi >= DT.Info[VLabel].Semi)
- return VLabel;
- else
- return VAncestorLabel;
-#endif
-}
-
-template<class GraphT>
-void Link(DominatorTreeBase<typename GraphT::NodeType>& DT,
- typename GraphT::NodeType* V, typename GraphT::NodeType* W,
- typename DominatorTreeBase<typename GraphT::NodeType>::InfoRec &WInfo) {
-#if !BALANCE_IDOM_TREE
- // Higher-complexity but faster implementation
- WInfo.Ancestor = V;
-#else
- // Lower-complexity but slower implementation
- GraphT::NodeType* WLabel = WInfo.Label;
- unsigned WLabelSemi = DT.Info[WLabel].Semi;
- GraphT::NodeType* S = W;
- InfoRec *SInfo = &DT.Info[S];
-
- GraphT::NodeType* SChild = SInfo->Child;
- InfoRec *SChildInfo = &DT.Info[SChild];
-
- while (WLabelSemi < DT.Info[SChildInfo->Label].Semi) {
- GraphT::NodeType* SChildChild = SChildInfo->Child;
- if (SInfo->Size+DT.Info[SChildChild].Size >= 2*SChildInfo->Size) {
- SChildInfo->Ancestor = S;
- SInfo->Child = SChild = SChildChild;
- SChildInfo = &DT.Info[SChild];
- } else {
- SChildInfo->Size = SInfo->Size;
- S = SInfo->Ancestor = SChild;
- SInfo = SChildInfo;
- SChild = SChildChild;
- SChildInfo = &DT.Info[SChild];
- }
- }
-
- DominatorTreeBase::InfoRec &VInfo = DT.Info[V];
- SInfo->Label = WLabel;
-
- assert(V != W && "The optimization here will not work in this case!");
- unsigned WSize = WInfo.Size;
- unsigned VSize = (VInfo.Size += WSize);
-
- if (VSize < 2*WSize)
- std::swap(S, VInfo.Child);
-
- while (S) {
- SInfo = &DT.Info[S];
- SInfo->Ancestor = V;
- S = SInfo->Child;
- }
-#endif