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diff --git a/include/llvm/Analysis/LoopVR.h b/include/llvm/Analysis/LoopVR.h
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+++ b/include/llvm/Analysis/LoopVR.h
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+//===- LoopVR.cpp - Value Range analysis driven by loop information -------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the interface for the loop-driven value range pass.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_ANALYSIS_LOOPVR_H
+#define LLVM_ANALYSIS_LOOPVR_H
+
+#include "llvm/Pass.h"
+#include "llvm/Analysis/ScalarEvolution.h"
+#include "llvm/Support/ConstantRange.h"
+#include <iosfwd>
+#include <map>
+
+namespace llvm {
+
+/// LoopVR - This class maintains a mapping of Values to ConstantRanges.
+/// There are interfaces to look up and update ranges by value, and for
+/// accessing all values with range information.
+///
+class LoopVR : public FunctionPass {
+public:
+  static char ID; // Class identification, replacement for typeinfo
+
+  LoopVR() : FunctionPass(&ID) {}
+
+  bool runOnFunction(Function &F);
+  virtual void print(std::ostream &os, const Module *) const;
+  void releaseMemory();
+
+  void getAnalysisUsage(AnalysisUsage &AU) const {
+    AU.addRequiredTransitive<LoopInfo>();
+    AU.addRequiredTransitive<ScalarEvolution>();
+    AU.setPreservesAll();
+  }
+
+  //===---------------------------------------------------------------------
+  // Methods that are used to look up and update particular values.
+
+  /// get - return the ConstantRange for a given Value of IntegerType.
+  ConstantRange get(Value *V);
+
+  /// remove - remove a value from this analysis.
+  void remove(Value *V);
+
+  /// narrow - improve our unterstanding of a Value by pointing out that it
+  /// must fall within ConstantRange. To replace a range, remove it first.
+  void narrow(Value *V, const ConstantRange &CR);
+
+  //===---------------------------------------------------------------------
+  // Methods that are used to iterate across all values with information.
+
+  /// size - returns the number of Values with information
+  unsigned size() const { return Map.size(); }
+
+  typedef std::map<Value *, ConstantRange *>::iterator iterator;
+
+  /// begin - return an iterator to the first Value, ConstantRange pair
+  iterator begin() { return Map.begin(); }
+
+  /// end - return an iterator one past the last Value, ConstantRange pair
+  iterator end() { return Map.end(); }
+
+  /// getValue - return the Value referenced by an iterator
+  Value *getValue(iterator I) { return I->first; }
+
+  /// getConstantRange - return the ConstantRange referenced by an iterator
+  ConstantRange getConstantRange(iterator I) { return *I->second; }
+
+private:
+  ConstantRange compute(Value *V);
+
+  ConstantRange getRange(SCEVHandle S, Loop *L, ScalarEvolution &SE);
+
+  ConstantRange getRange(SCEVHandle S, SCEVHandle T, ScalarEvolution &SE);
+
+  std::map<Value *, ConstantRange *> Map;
+};
+
+} // end llvm namespace
+
+#endif