namespace llvm {
+//===-------------------------------------
+/// ImmediatePostDominators Class - Concrete subclass of ImmediateDominatorsBase
+/// that is used to compute a normal immediate dominator set.
+///
+struct ImmediatePostDominators : public ImmediateDominatorsBase {
+ ImmediatePostDominators() : ImmediateDominatorsBase(false) {}
+
+ virtual bool runOnFunction(Function &F);
+
+ virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.setPreservesAll();
+ }
+
+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
///
struct PostDominatorSet : public DominatorSetBase {
PostDominatorSet() : DominatorSetBase(true) {}
-
+
virtual bool runOnFunction(Function &F);
-
- /// getAnalysisUsage - This pass does not modify the function at all.
+
+ /// 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();
};
-
-/// ImmediatePostDominators Class - Concrete subclass of ImmediateDominatorsBase
-/// that is used to compute the immediate post-dominators.
+/// PostDominatorTree Class - Concrete subclass of DominatorTree that is used to
+/// compute the a post-dominator tree.
///
-struct ImmediatePostDominators : public ImmediateDominatorsBase {
- ImmediatePostDominators() : ImmediateDominatorsBase(true) {}
+struct PostDominatorTree : public DominatorTreeBase {
+ PostDominatorTree() : DominatorTreeBase(true) {}
virtual bool runOnFunction(Function &F) {
- IDoms.clear(); // Reset from the last time we were run...
- PostDominatorSet &DS = getAnalysis<PostDominatorSet>();
- Roots = DS.getRoots();
- calcIDoms(DS);
+ reset(); // Reset from the last time we were run...
+ ImmediatePostDominators &IPD = getAnalysis<ImmediatePostDominators>();
+ Roots = IPD.getRoots();
+ calculate(IPD);
return false;
}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
- AU.addRequired<PostDominatorSet>();
+ AU.addRequired<ImmediatePostDominators>();
}
private:
- void calcIDoms(const DominatorSetBase &DS);
+ void calculate(const ImmediatePostDominators &IPD);
+ Node *getNodeForBlock(BasicBlock *BB);
};
-/// PostDominatorTree Class - Concrete subclass of DominatorTree that is used to
-/// compute the a post-dominator tree.
-///
-struct PostDominatorTree : public DominatorTreeBase {
- PostDominatorTree() : DominatorTreeBase(true) {}
+/// 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>();
+ }
virtual bool runOnFunction(Function &F) {
reset(); // Reset from the last time we were run...
- PostDominatorSet &DS = getAnalysis<PostDominatorSet>();
- Roots = DS.getRoots();
- calculate(DS);
+ ImmediatePostDominators &ID = getAnalysis<ImmediatePostDominators>();
+ Roots = ID.getRoots();
+ calculate(ID);
return false;
}
- virtual void getAnalysisUsage(AnalysisUsage &AU) const {
- AU.setPreservesAll();
- AU.addRequired<PostDominatorSet>();
- }
-private:
- void calculate(const PostDominatorSet &DS);
+ void calculate(const ImmediatePostDominators &ID);
+ ETNode *getNodeForBlock(BasicBlock *BB);
};
AU.addRequired<PostDominatorTree>();
}
- // stub - dummy function, just ignore it
- static void stub();
-
private:
const DomSetType &calculate(const PostDominatorTree &DT,
const DominatorTree::Node *Node);
};
-// Make sure that any clients of this file link in PostDominators.cpp
-static IncludeFile
-POST_DOMINATOR_INCLUDE_FILE((void*)&PostDominanceFrontier::stub);
-
} // End llvm namespace
+// Make sure that any clients of this file link in PostDominators.cpp
+FORCE_DEFINING_FILE_TO_BE_LINKED(PostDominanceFrontier)
+
#endif