namespace llvm {
-//===-------------------------------------
-/// ImmediatePostDominators Class - Concrete subclass of ImmediateDominatorsBase
-/// that is used to compute a normal immediate dominator set.
+/// PostDominatorTree Class - Concrete subclass of DominatorTree that is used to
+/// compute the a post-dominator tree.
///
-struct ImmediatePostDominators : public ImmediateDominatorsBase {
- ImmediatePostDominators() : ImmediateDominatorsBase(false) {}
-
- virtual bool runOnFunction(Function &F);
-
- virtual void getAnalysisUsage(AnalysisUsage &AU) const {
- AU.setPreservesAll();
+struct PostDominatorTree : public FunctionPass {
+ static char ID; // Pass identification, replacement for typeid
+ DominatorTreeBase<BasicBlock>* DT;
+
+ PostDominatorTree() : FunctionPass((intptr_t)&ID) {
+ DT = new DominatorTreeBase<BasicBlock>(true);
}
-
-private:
- unsigned DFSPass(BasicBlock *V, InfoRec &VInfo, unsigned N);
- void Compress(BasicBlock *V, InfoRec &VInfo);
- BasicBlock *Eval(BasicBlock *v);
- void Link(BasicBlock *V, BasicBlock *W, InfoRec &WInfo);
-};
-/// PostDominatorSet Class - Concrete subclass of DominatorSetBase that is used
-/// to compute the post-dominator set. Because there can be multiple exit nodes
-/// in an LLVM function, we calculate post dominators with a special null block
-/// which is the virtual exit node that the real exit nodes all virtually branch
-/// to. Clients should be prepared to see an entry in the dominator sets with a
-/// null BasicBlock*.
-///
-struct PostDominatorSet : public DominatorSetBase {
- PostDominatorSet() : DominatorSetBase(true) {}
-
virtual bool runOnFunction(Function &F);
-
- /// getAnalysisUsage - This simply provides a dominator set
- ///
+
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
- AU.addRequired<ImmediatePostDominators>();
AU.setPreservesAll();
}
- // stub - dummy function, just ignore it
- static void stub();
-};
-
-/// PostDominatorTree Class - Concrete subclass of DominatorTree that is used to
-/// compute the a post-dominator tree.
-///
-struct PostDominatorTree : public DominatorTreeBase {
- PostDominatorTree() : DominatorTreeBase(true) {}
-
- virtual bool runOnFunction(Function &F) {
- reset(); // Reset from the last time we were run...
- ImmediatePostDominators &IPD = getAnalysis<ImmediatePostDominators>();
- Roots = IPD.getRoots();
- calculate(IPD);
- return false;
+ inline const std::vector<BasicBlock*> &getRoots() const {
+ return DT->getRoots();
}
-
- virtual void getAnalysisUsage(AnalysisUsage &AU) const {
- AU.setPreservesAll();
- AU.addRequired<ImmediatePostDominators>();
+
+ inline DomTreeNode *getRootNode() const {
+ return DT->getRootNode();
}
-private:
- void calculate(const ImmediatePostDominators &IPD);
- Node *getNodeForBlock(BasicBlock *BB);
-};
-
-
-/// PostETForest Class - Concrete subclass of ETForestBase that is used to
-/// compute a forwards post-dominator ET-Forest.
-struct PostETForest : public ETForestBase {
- PostETForest() : ETForestBase(true) {}
-
- virtual void getAnalysisUsage(AnalysisUsage &AU) const {
- AU.setPreservesAll();
- AU.addRequired<ImmediatePostDominators>();
+
+ inline DomTreeNode *operator[](BasicBlock *BB) const {
+ return DT->getNode(BB);
}
-
- virtual bool runOnFunction(Function &F) {
- reset(); // Reset from the last time we were run...
- ImmediatePostDominators &ID = getAnalysis<ImmediatePostDominators>();
- Roots = ID.getRoots();
- calculate(ID);
- return false;
+
+ inline bool properlyDominates(const DomTreeNode* A, DomTreeNode* B) const {
+ return DT->properlyDominates(A, B);
+ }
+
+ inline bool properlyDominates(BasicBlock* A, BasicBlock* B) const {
+ return DT->properlyDominates(A, B);
}
-
- void calculate(const ImmediatePostDominators &ID);
- ETNode *getNodeForBlock(BasicBlock *BB);
};
/// used to compute the a post-dominance frontier.
///
struct PostDominanceFrontier : public DominanceFrontierBase {
- PostDominanceFrontier() : DominanceFrontierBase(true) {}
+ static char ID;
+ PostDominanceFrontier()
+ : DominanceFrontierBase((intptr_t) &ID, true) {}
virtual bool runOnFunction(Function &) {
Frontiers.clear();
PostDominatorTree &DT = getAnalysis<PostDominatorTree>();
Roots = DT.getRoots();
- if (const DominatorTree::Node *Root = DT.getRootNode())
+ if (const DomTreeNode *Root = DT.getRootNode())
calculate(DT, Root);
return false;
}
private:
const DomSetType &calculate(const PostDominatorTree &DT,
- const DominatorTree::Node *Node);
+ const DomTreeNode *Node);
};
} // End llvm namespace