-/// PostDominanceFrontier Class - Concrete subclass of DominanceFrontier that is
-/// used to compute the a post-dominance frontier.
-///
-struct PostDominanceFrontier : public DominanceFrontierBase {
- static char ID;
- PostDominanceFrontier()
- : DominanceFrontierBase(ID, true) {
- initializePostDominanceFrontierPass(*PassRegistry::getPassRegistry());
- }
-
- virtual bool runOnFunction(Function &) {
- Frontiers.clear();
- PostDominatorTree &DT = getAnalysis<PostDominatorTree>();
- Roots = DT.getRoots();
- if (const DomTreeNode *Root = DT.getRootNode())
- calculate(DT, Root);
- return false;
- }
-
- virtual void getAnalysisUsage(AnalysisUsage &AU) const {
- AU.setPreservesAll();
- AU.addRequired<PostDominatorTree>();
- }
-
-private:
- const DomSetType &calculate(const PostDominatorTree &DT,
- const DomTreeNode *Node);
-};
-
-FunctionPass* createPostDomFrontier();
-