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diff --git a/lib/Target/SparcV9/LiveVar/FunctionLiveVarInfo.h b/lib/Target/SparcV9/LiveVar/FunctionLiveVarInfo.h
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+//===-- CodeGen/FunctionLiveVarInfo.h - LiveVar Analysis --------*- 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 is the interface for live variable info of a function that is required 
+// by any other part of the compiler
+//
+// After the analysis, getInSetOfBB or getOutSetofBB can be called to get 
+// live var info of a BB.
+//
+// The live var set before an instruction can be obtained in 2 ways:
+//
+// 1. Use the method getLiveVarSetAfterInst(Instruction *) to get the LV Info 
+//    just after an instruction. (also exists getLiveVarSetBeforeInst(..))
+//
+//    This function caluclates the LV info for a BB only once and caches that 
+//    info. If the cache does not contain the LV info of the instruction, it 
+//    calculates the LV info for the whole BB and caches them.
+//
+//    Getting liveVar info this way uses more memory since, LV info should be 
+//    cached. However, if you need LV info of nearly all the instructions of a
+//    BB, this is the best and simplest interfrace.
+//
+// 2. Use the OutSet and applyTranferFuncForInst(const Instruction *const Inst) 
+//    declared in LiveVarSet and  traverse the instructions of a basic block in 
+//    reverse (using const_reverse_iterator in the BB class). 
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef FUNCTION_LIVE_VAR_INFO_H
+#define FUNCTION_LIVE_VAR_INFO_H
+
+#include "Support/hash_map"
+#include "llvm/Pass.h"
+#include "llvm/CodeGen/ValueSet.h"
+
+namespace llvm {
+
+class BBLiveVar;
+class MachineInstr;
+
+class FunctionLiveVarInfo : public FunctionPass {
+  // Machine Instr to LiveVarSet Map for providing LVset BEFORE each inst
+  // These sets are owned by this map and will be freed in releaseMemory().
+  hash_map<const MachineInstr *, ValueSet *> MInst2LVSetBI; 
+
+  // Machine Instr to LiveVarSet Map for providing LVset AFTER each inst.
+  // These sets are just pointers to sets in MInst2LVSetBI or BBLiveVar.
+  hash_map<const MachineInstr *, ValueSet *> MInst2LVSetAI;
+
+  hash_map<const BasicBlock*, BBLiveVar*> BBLiveVarInfo;
+
+  // Stored Function that the data is computed with respect to
+  const Function *M;
+
+  // --------- private methods -----------------------------------------
+
+  // constructs BBLiveVars and init Def and In sets
+  void constructBBs(const Function *F);
+    
+  // do one backward pass over the CFG
+  bool doSingleBackwardPass(const Function *F, unsigned int iter); 
+
+  // calculates live var sets for instructions in a BB
+  void calcLiveVarSetsForBB(const BasicBlock *BB);
+  
+public:
+  // --------- Implement the FunctionPass interface ----------------------
+
+  // runOnFunction - Perform analysis, update internal data structures.
+  virtual bool runOnFunction(Function &F);
+
+  // releaseMemory - After LiveVariable analysis has been used, forget!
+  virtual void releaseMemory();
+
+  // getAnalysisUsage - Provide self!
+  virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+    AU.setPreservesAll();
+  }
+
+  // --------- Functions to access analysis results -------------------
+
+  // get OutSet of a BB
+  const ValueSet &getOutSetOfBB(const BasicBlock *BB) const;
+        ValueSet &getOutSetOfBB(const BasicBlock *BB)      ;
+
+  // get InSet of a BB
+  const ValueSet &getInSetOfBB(const BasicBlock *BB) const;
+        ValueSet &getInSetOfBB(const BasicBlock *BB)      ;
+
+  // gets the Live var set BEFORE an instruction.
+  // if BB is specified and the live var set has not yet been computed,
+  // it will be computed on demand.
+  const ValueSet &getLiveVarSetBeforeMInst(const MachineInstr *MI,
+                                           const BasicBlock *BB = 0);
+
+  // gets the Live var set AFTER an instruction
+  // if BB is specified and the live var set has not yet been computed,
+  // it will be computed on demand.
+  const ValueSet &getLiveVarSetAfterMInst(const MachineInstr *MI,
+                                          const BasicBlock *BB = 0);
+};
+
+} // End llvm namespace
+
+#endif