Changed llvm_ostream et all to OStream. llvm_cerr, llvm_cout, llvm_null, are

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

diff --git a/include/llvm/Analysis/PostDominators.h b/include/llvm/Analysis/PostDominators.h
index f092d159c1a13faeb83aa8d4ac5190cb269d0a86..4d8d140373eabd5790cb039ee0d67d3d66c2a899 100644 (file)
--- a/include/llvm/Analysis/PostDominators.h
+++ b/include/llvm/Analysis/PostDominators.h
@@ -1,10 +1,10 @@
 //=- llvm/Analysis/PostDominators.h - Post Dominator Calculation-*- C++ -*-===//
-// 
+//
 //                     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 exposes interfaces to post dominance information.
@@ -18,6 +18,25 @@
 
 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
@@ -28,70 +47,70 @@ namespace llvm {
 ///
 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.
-//
-struct ImmediatePostDominators : public ImmediateDominatorsBase {
-  ImmediatePostDominators() : ImmediateDominatorsBase(true) {}
+/// 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) {
-    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);
 };
 
 
-//===-------------------------------------
-// PostDominanceFrontier Class - Concrete subclass of DominanceFrontier that is
-// used to compute the a post-dominance frontier.
-//
+/// PostDominanceFrontier Class - Concrete subclass of DominanceFrontier that is
+/// used to compute the a post-dominance frontier.
+///
 struct PostDominanceFrontier : public DominanceFrontierBase {
   PostDominanceFrontier() : DominanceFrontierBase(true) {}
 
@@ -109,18 +128,14 @@ struct PostDominanceFrontier : public DominanceFrontierBase {
     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