Rename some GC classes so that their roll will hopefully be clearer.

[oota-llvm.git] / include / llvm / CodeGen / MachineDominators.h

diff --git a/include/llvm/CodeGen/MachineDominators.h b/include/llvm/CodeGen/MachineDominators.h
index 01a09a79226501d74d5a42bca7fafcbbbc575ec9..7d1d9fe9ccf31b8a4a3db4f65d4ebe2588688f20 100644 (file)
--- a/include/llvm/CodeGen/MachineDominators.h
+++ b/include/llvm/CodeGen/MachineDominators.h
@@ -2,8 +2,8 @@
 //
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by Owen Anderson 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.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -54,10 +54,12 @@ public:
     delete DT;
   }
   
-   virtual void getAnalysisUsage(AnalysisUsage &AU) const {
-     AU.setPreservesAll();
-     MachineFunctionPass::getAnalysisUsage(AU);
-   }
+  DominatorTreeBase<MachineBasicBlock>& getBase() { return *DT; }
+  
+  virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+    AU.setPreservesAll();
+    MachineFunctionPass::getAnalysisUsage(AU);
+  }
   
   /// getRoots -  Return the root blocks of the current CFG.  This may include
   /// multiple blocks if we are computing post dominators.  For forward
@@ -180,6 +182,35 @@ public:
   }
 };
 
+//===-------------------------------------
+/// DominatorTree GraphTraits specialization so the DominatorTree can be
+/// iterable by generic graph iterators.
+///
+
+template<class T> struct GraphTraits;
+
+template <> struct GraphTraits<MachineDomTreeNode *> {
+  typedef MachineDomTreeNode NodeType;
+  typedef NodeType::iterator  ChildIteratorType;
+  
+  static NodeType *getEntryNode(NodeType *N) {
+    return N;
+  }
+  static inline ChildIteratorType child_begin(NodeType* N) {
+    return N->begin();
+  }
+  static inline ChildIteratorType child_end(NodeType* N) {
+    return N->end();
+  }
+};
+
+template <> struct GraphTraits<MachineDominatorTree*>
+  : public GraphTraits<MachineDomTreeNode *> {
+  static NodeType *getEntryNode(MachineDominatorTree *DT) {
+    return DT->getRootNode();
+  }
+};
+
 }
 
 #endif