Revert r254592 (virtual dtor in SCEVPredicate).

[oota-llvm.git] / include / llvm / Analysis / PostDominators.h

diff --git a/include/llvm/Analysis/PostDominators.h b/include/llvm/Analysis/PostDominators.h
index b2a37ffdb062917c8882741d6c7d042a09b2bd17..0f7e2b88d2d70a68bd0d7dabc79f284ef0a7590b 100644 (file)
--- a/include/llvm/Analysis/PostDominators.h
+++ b/include/llvm/Analysis/PostDominators.h
@@ -2,8 +2,8 @@
 //
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -11,69 +11,107 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_ANALYSIS_POST_DOMINATORS_H
-#define LLVM_ANALYSIS_POST_DOMINATORS_H
+#ifndef LLVM_ANALYSIS_POSTDOMINATORS_H
+#define LLVM_ANALYSIS_POSTDOMINATORS_H
 
-#include "llvm/Analysis/Dominators.h"
+#include "llvm/IR/Dominators.h"
 
 namespace llvm {
 
 /// PostDominatorTree Class - Concrete subclass of DominatorTree that is used to
-/// compute the a post-dominator tree.
+/// compute the post-dominator tree.
 ///
-struct PostDominatorTree : public DominatorTreeBase {
+struct PostDominatorTree : public FunctionPass {
   static char ID; // Pass identification, replacement for typeid
+  DominatorTreeBase<BasicBlock>* DT;
 
-  PostDominatorTree() : 
-    DominatorTreeBase((intptr_t)&ID, true) {}
-
-  virtual bool runOnFunction(Function &F) {
-    reset();     // Reset from the last time we were run...
-    PDTcalculate(*this, F);
-    return false;
+  PostDominatorTree() : FunctionPass(ID) {
+    initializePostDominatorTreePass(*PassRegistry::getPassRegistry());
+    DT = new DominatorTreeBase<BasicBlock>(true);
   }
 
-  virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+  ~PostDominatorTree() override;
+
+  bool runOnFunction(Function &F) override;
+
+  void getAnalysisUsage(AnalysisUsage &AU) const override {
     AU.setPreservesAll();
   }
-private:
-  unsigned DFSPass(BasicBlock *V, unsigned N);
-  friend void PDTcalculate(PostDominatorTree& PDT, Function &F);
-  friend void PDTLink(PostDominatorTree& PDT,BasicBlock *V,
-                      BasicBlock *W, InfoRec &WInfo);
-};
 
+  inline const std::vector<BasicBlock*> &getRoots() const {
+    return DT->getRoots();
+  }
 
-/// 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((intptr_t) &ID, true) {}
+  inline DomTreeNode *getRootNode() const {
+    return DT->getRootNode();
+  }
 
-  virtual bool runOnFunction(Function &) {
-    Frontiers.clear();
-    PostDominatorTree &DT = getAnalysis<PostDominatorTree>();
-    Roots = DT.getRoots();
-    if (const DomTreeNode *Root = DT.getRootNode())
-      calculate(DT, Root);
-    return false;
+  inline DomTreeNode *operator[](BasicBlock *BB) const {
+    return DT->getNode(BB);
   }
 
-  virtual void getAnalysisUsage(AnalysisUsage &AU) const {
-    AU.setPreservesAll();
-    AU.addRequired<PostDominatorTree>();
+  inline DomTreeNode *getNode(BasicBlock *BB) const {
+    return DT->getNode(BB);
   }
 
-private:
-  const DomSetType &calculate(const PostDominatorTree &DT,
-                              const DomTreeNode *Node);
+  inline bool dominates(DomTreeNode* A, DomTreeNode* B) const {
+    return DT->dominates(A, B);
+  }
+
+  inline bool dominates(const BasicBlock* A, const BasicBlock* B) const {
+    return DT->dominates(A, B);
+  }
+
+  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);
+  }
+
+  inline BasicBlock *findNearestCommonDominator(BasicBlock *A, BasicBlock *B) {
+    return DT->findNearestCommonDominator(A, B);
+  }
+
+  inline const BasicBlock *findNearestCommonDominator(const BasicBlock *A,
+                                                      const BasicBlock *B) {
+    return DT->findNearestCommonDominator(A, B);
+  }
+
+  /// Get all nodes post-dominated by R, including R itself.
+  void getDescendants(BasicBlock *R,
+                      SmallVectorImpl<BasicBlock *> &Result) const {
+    DT->getDescendants(R, Result);
+  }
+
+  void releaseMemory() override {
+    DT->releaseMemory();
+  }
+
+  void print(raw_ostream &OS, const Module*) const override;
 };
 
-} // End llvm namespace
+FunctionPass* createPostDomTree();
 
-// Make sure that any clients of this file link in PostDominators.cpp
-FORCE_DEFINING_FILE_TO_BE_LINKED(PostDominanceFrontier)
+template <> struct GraphTraits<PostDominatorTree*>
+  : public GraphTraits<DomTreeNode*> {
+  static NodeType *getEntryNode(PostDominatorTree *DT) {
+    return DT->getRootNode();
+  }
+
+  static nodes_iterator nodes_begin(PostDominatorTree *N) {
+    if (getEntryNode(N))
+      return df_begin(getEntryNode(N));
+    else
+      return df_end(getEntryNode(N));
+  }
+
+  static nodes_iterator nodes_end(PostDominatorTree *N) {
+    return df_end(getEntryNode(N));
+  }
+};
+
+} // End llvm namespace
 
 #endif