Change from using a stub function to a stub variable for passing to the

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

diff --git a/include/llvm/Analysis/PostDominators.h b/include/llvm/Analysis/PostDominators.h
index 6e5e0981a15e4aecd6b42b16bec50293c82a72b7..1436be30375f57e95abcddb3c17d7159b793a109 100644 (file)
--- a/include/llvm/Analysis/PostDominators.h
+++ b/include/llvm/Analysis/PostDominators.h
@@ -1,5 +1,12 @@
 //=- 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.
 //
 //===----------------------------------------------------------------------===//
@@ -9,6 +16,27 @@
 
 #include "llvm/Analysis/Dominators.h"
 
+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
@@ -19,68 +47,70 @@
 ///
 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 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) {}
 
@@ -99,7 +129,7 @@ struct PostDominanceFrontier : public DominanceFrontierBase {
   }
 
   // stub - dummy function, just ignore it
-  static void stub();
+  static int stub;
 
 private:
   const DomSetType &calculate(const PostDominatorTree &DT,
@@ -108,6 +138,8 @@ private:
 
 // Make sure that any clients of this file link in PostDominators.cpp
 static IncludeFile
-POST_DOMINATOR_INCLUDE_FILE((void*)&PostDominanceFrontier::stub);
+POST_DOMINATOR_INCLUDE_FILE(&PostDominanceFrontier::stub);
+
+} // End llvm namespace
 
 #endif