Speculatively revert the recent improvements to Dominators.h in an attempt to track down the gcc bootstrap miscompare.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123254 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Analysis/Dominators.h

@@ -200,6 +200,8 @@ protected:
     NodeT *Label, *Child;
     unsigned Parent, Ancestor;
 
+    std::vector<NodeT*> Bucket;
+
     InfoRec() : DFSNum(0), Semi(0), Size(0), Label(0), Child(0), Parent(0),
                 Ancestor(0) {}
   };
@@ -291,6 +293,9 @@ public:
     : DominatorBase<NodeT>(isPostDom), DFSInfoValid(false), SlowQueries(0) {}
   virtual ~DominatorTreeBase() { reset(); }
 
+  // FIXME: Should remove this
+  virtual bool runOnFunction(Function &F) { return false; }
+
   /// compare - Return false if the other dominator tree base matches this
   /// dominator tree base. Otherwise return true.
   bool compare(DominatorTreeBase &Other) const {