diff --git a/include/llvm/Instructions.h b/include/llvm/Instructions.h
index 1cc1f17..80b7ca4 100644
--- a/include/llvm/Instructions.h
+++ b/include/llvm/Instructions.h
@@ -2508,26 +2508,27 @@
   /// indirect function invocation.
   ///
   Function *getCalledFunction() const {
-    return dyn_cast<Function>(Op<-3>());
+    return dyn_cast<Function>(getOperand(0));
   }
 
   /// getCalledValue - Get a pointer to the function that is invoked by this
   /// instruction
-  const Value *getCalledValue() const { return Op<-3>(); }
-        Value *getCalledValue()       { return Op<-3>(); }
+  const Value *getCalledValue() const { return getOperand(0); }
+        Value *getCalledValue()       { return getOperand(0); }
 
   // get*Dest - Return the destination basic blocks...
   BasicBlock *getNormalDest() const {
-    return cast<BasicBlock>(Op<-2>());
+    return cast<BasicBlock>(getOperand(1));
   }
   BasicBlock *getUnwindDest() const {
-    return cast<BasicBlock>(Op<-1>());
+    return cast<BasicBlock>(getOperand(2));
   }
   void setNormalDest(BasicBlock *B) {
-    Op<-2>() = reinterpret_cast<Value*>(B);
+    setOperand(1, (Value*)B);
   }
+
   void setUnwindDest(BasicBlock *B) {
-    Op<-1>() = reinterpret_cast<Value*>(B);
+    setOperand(2, (Value*)B);
   }
 
   BasicBlock *getSuccessor(unsigned i) const {
@@ -2537,7 +2538,7 @@
 
   void setSuccessor(unsigned idx, BasicBlock *NewSucc) {
     assert(idx < 2 && "Successor # out of range for invoke!");
-    *(&Op<-2>() + idx) = reinterpret_cast<Value*>(NewSucc);
+    setOperand(idx+1, (Value*)NewSucc);
   }
 
   unsigned getNumSuccessors() const { return 2; }
@@ -2550,7 +2551,6 @@
   static inline bool classof(const Value *V) {
     return isa<Instruction>(V) && classof(cast<Instruction>(V));
   }
-
 private:
   virtual BasicBlock *getSuccessorV(unsigned idx) const;
   virtual unsigned getNumSuccessorsV() const;
diff --git a/include/llvm/Support/CallSite.h b/include/llvm/Support/CallSite.h
index 5bfcc6d..285b558 100644
--- a/include/llvm/Support/CallSite.h
+++ b/include/llvm/Support/CallSite.h
@@ -118,7 +118,7 @@
   ///
   Value *getCalledValue() const {
     assert(getInstruction() && "Not a call or invoke instruction!");
-    return *getCallee();
+    return getInstruction()->getOperand(0);
   }
 
   /// getCalledFunction - Return the function being called if this is a direct
@@ -132,7 +132,7 @@
   ///
   void setCalledFunction(Value *V) {
     assert(getInstruction() && "Not a call or invoke instruction!");
-    *getCallee() = V;
+    getInstruction()->setOperand(0, V);
   }
 
   Value *getArgument(unsigned ArgNo) const {
@@ -146,16 +146,6 @@
     getInstruction()->setOperand(getArgumentOffset() + ArgNo, newVal);
   }
 
-  /// Given a value use iterator, returns the argument that corresponds to it.
-  /// Iterator must actually correspond to an argument.
-  unsigned getArgumentNo(Value::use_iterator I) const {
-    assert(getInstruction() && "Not a call or invoke instruction!");
-    assert(arg_begin() <= &I.getUse() && &I.getUse() < arg_end()
-           && "Argument # out of range!");
-
-    return &I.getUse() - arg_begin();
-  }
-
   /// Given an operand number, returns the argument that corresponds to it.
   /// OperandNo must be a valid operand number that actually corresponds to an
   /// argument.
@@ -181,7 +171,7 @@
     return getInstruction()->op_begin() + getArgumentOffset();
   }
 
-  arg_iterator arg_end() const { return getInstruction()->op_end() - getArgumentEndOffset(); }
+  arg_iterator arg_end() const { return getInstruction()->op_end(); }
   bool arg_empty() const { return arg_end() == arg_begin(); }
   unsigned arg_size() const { return unsigned(arg_end() - arg_begin()); }
 
@@ -190,25 +180,17 @@
   }
 
   bool isCallee(Value::use_iterator UI) const {
-    return getCallee() == &UI.getUse();
+    return getInstruction()->op_begin() == &UI.getUse();
   }
+
 private:
   /// Returns the operand number of the first argument
   unsigned getArgumentOffset() const {
     if (isCall())
       return 1; // Skip Function
     else
-      return 0; // Args are at the front
+      return 3; // Skip Function, BB, BB
   }
-
-  unsigned getArgumentEndOffset() const {
-    if (isCall())
-      return 0; // Unchanged
-    else
-      return 3; // Skip BB, BB, Function
-  }
-
-  User::op_iterator getCallee() const;
 };
 
 } // End llvm namespace
diff --git a/lib/Analysis/IPA/GlobalsModRef.cpp b/lib/Analysis/IPA/GlobalsModRef.cpp
index b14afa3..7b43089 100644
--- a/lib/Analysis/IPA/GlobalsModRef.cpp
+++ b/lib/Analysis/IPA/GlobalsModRef.cpp
@@ -257,7 +257,7 @@
     } else if (InvokeInst *II = dyn_cast<InvokeInst>(*UI)) {
       // Make sure that this is just the function being called, not that it is
       // passing into the function.
-      for (unsigned i = 0, e = II->getNumOperands() - 3; i != e; ++i)
+      for (unsigned i = 3, e = II->getNumOperands(); i != e; ++i)
         if (II->getOperand(i) == V) return true;
     } else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(*UI)) {
       if (CE->getOpcode() == Instruction::GetElementPtr ||
diff --git a/lib/Bitcode/Writer/BitcodeWriter.cpp b/lib/Bitcode/Writer/BitcodeWriter.cpp
index 1f69e16..3ab2726 100644
--- a/lib/Bitcode/Writer/BitcodeWriter.cpp
+++ b/lib/Bitcode/Writer/BitcodeWriter.cpp
@@ -1090,11 +1090,11 @@
 
     // Emit value #'s for the fixed parameters.
     for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
-      Vals.push_back(VE.getValueID(I.getOperand(i)));  // fixed param.
+      Vals.push_back(VE.getValueID(I.getOperand(i+3)));  // fixed param.
 
     // Emit type/value pairs for varargs params.
     if (FTy->isVarArg()) {
-      for (unsigned i = FTy->getNumParams(), e = I.getNumOperands()-3;
+      for (unsigned i = 3+FTy->getNumParams(), e = I.getNumOperands();
            i != e; ++i)
         PushValueAndType(I.getOperand(i), InstID, Vals, VE); // vararg
     }
diff --git a/lib/Transforms/IPO/DeadArgumentElimination.cpp b/lib/Transforms/IPO/DeadArgumentElimination.cpp
index ca397e5..f386ed7 100644
--- a/lib/Transforms/IPO/DeadArgumentElimination.cpp
+++ b/lib/Transforms/IPO/DeadArgumentElimination.cpp
@@ -352,14 +352,14 @@
         // argument, since if it was the function argument this would be an
         // indirect call and the we know can't be looking at a value of the
         // label type (for the invoke instruction).
-        unsigned ArgNo = CS.getArgumentNo(U);
+        unsigned ArgNo = CS.getArgumentNo(U.getOperandNo());
 
         if (ArgNo >= F->getFunctionType()->getNumParams())
           // The value is passed in through a vararg! Must be live.
           return Live;
 
-        assert(CS.getArgument(ArgNo)
-               == CS.getInstruction()->getOperand(U.getOperandNo())
+        assert(CS.getArgument(ArgNo) 
+               == CS.getInstruction()->getOperand(U.getOperandNo()) 
                && "Argument is not where we expected it");
 
         // Value passed to a normal call. It's only live when the corresponding
diff --git a/lib/Transforms/IPO/PruneEH.cpp b/lib/Transforms/IPO/PruneEH.cpp
index 161246b..3ae771c 100644
--- a/lib/Transforms/IPO/PruneEH.cpp
+++ b/lib/Transforms/IPO/PruneEH.cpp
@@ -168,7 +168,7 @@
   for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
     if (InvokeInst *II = dyn_cast<InvokeInst>(BB->getTerminator()))
       if (II->doesNotThrow()) {
-        SmallVector<Value*, 8> Args(II->op_begin(), II->op_end() - 3);
+        SmallVector<Value*, 8> Args(II->op_begin()+3, II->op_end());
         // Insert a call instruction before the invoke.
         CallInst *Call = CallInst::Create(II->getCalledValue(),
                                           Args.begin(), Args.end(), "", II);
diff --git a/lib/Transforms/Scalar/SimplifyCFGPass.cpp b/lib/Transforms/Scalar/SimplifyCFGPass.cpp
index b621e8d..738c5e8 100644
--- a/lib/Transforms/Scalar/SimplifyCFGPass.cpp
+++ b/lib/Transforms/Scalar/SimplifyCFGPass.cpp
@@ -79,7 +79,7 @@
 /// ChangeToCall - Convert the specified invoke into a normal call.
 static void ChangeToCall(InvokeInst *II) {
   BasicBlock *BB = II->getParent();
-  SmallVector<Value*, 8> Args(II->op_begin(), II->op_end() - 3);
+  SmallVector<Value*, 8> Args(II->op_begin()+3, II->op_end());
   CallInst *NewCall = CallInst::Create(II->getCalledValue(), Args.begin(),
                                        Args.end(), "", II);
   NewCall->takeName(II);
diff --git a/lib/Transforms/Utils/LowerInvoke.cpp b/lib/Transforms/Utils/LowerInvoke.cpp
index bbbcc1a..766c4d9 100644
--- a/lib/Transforms/Utils/LowerInvoke.cpp
+++ b/lib/Transforms/Utils/LowerInvoke.cpp
@@ -226,7 +226,7 @@
   bool Changed = false;
   for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB)
     if (InvokeInst *II = dyn_cast<InvokeInst>(BB->getTerminator())) {
-      std::vector<Value*> CallArgs(II->op_begin(), II->op_end() - 3);
+      std::vector<Value*> CallArgs(II->op_begin()+3, II->op_end());
       // Insert a normal call instruction...
       CallInst *NewCall = CallInst::Create(II->getCalledValue(),
                                            CallArgs.begin(), CallArgs.end(), "",II);
@@ -298,7 +298,7 @@
   CatchSwitch->addCase(InvokeNoC, II->getUnwindDest());
 
   // Insert a normal call instruction.
-  std::vector<Value*> CallArgs(II->op_begin(), II->op_end() - 3);
+  std::vector<Value*> CallArgs(II->op_begin()+3, II->op_end());
   CallInst *NewCall = CallInst::Create(II->getCalledValue(),
                                        CallArgs.begin(), CallArgs.end(), "",
                                        II);
diff --git a/lib/VMCore/AsmWriter.cpp b/lib/VMCore/AsmWriter.cpp
index bbe6143..0eb9f02 100644
--- a/lib/VMCore/AsmWriter.cpp
+++ b/lib/VMCore/AsmWriter.cpp
@@ -1875,7 +1875,6 @@
     if (PAL.getFnAttributes() != Attribute::None)
       Out << ' ' << Attribute::getAsString(PAL.getFnAttributes());
   } else if (const InvokeInst *II = dyn_cast<InvokeInst>(&I)) {
-    Operand = II->getCalledValue();
     const PointerType    *PTy = cast<PointerType>(Operand->getType());
     const FunctionType   *FTy = cast<FunctionType>(PTy->getElementType());
     const Type         *RetTy = FTy->getReturnType();
@@ -1913,10 +1912,10 @@
       writeOperand(Operand, true);
     }
     Out << '(';
-    for (unsigned op = 0, Eop = I.getNumOperands() - 3; op < Eop; ++op) {
-      if (op)
+    for (unsigned op = 3, Eop = I.getNumOperands(); op < Eop; ++op) {
+      if (op > 3)
         Out << ", ";
-      writeParamOperand(I.getOperand(op), PAL.getParamAttributes(op + 1));
+      writeParamOperand(I.getOperand(op), PAL.getParamAttributes(op-2));
     }
 
     Out << ')';
diff --git a/lib/VMCore/Instructions.cpp b/lib/VMCore/Instructions.cpp
index e87f004..8f4763f 100644
--- a/lib/VMCore/Instructions.cpp
+++ b/lib/VMCore/Instructions.cpp
@@ -98,13 +98,6 @@
   return false;
 }
 
-User::op_iterator CallSite::getCallee() const {
-  Instruction *II(getInstruction());
-  return isCall()
-    ? cast<CallInst>(II)->op_begin()
-    : cast<InvokeInst>(II)->op_end() - 3; // Skip BB, BB, Function
-}
-
 #undef CALLSITE_DELEGATE_GETTER
 #undef CALLSITE_DELEGATE_SETTER
 
@@ -618,9 +611,10 @@
 void InvokeInst::init(Value *Fn, BasicBlock *IfNormal, BasicBlock *IfException,
                       Value* const *Args, unsigned NumArgs) {
   assert(NumOperands == 3+NumArgs && "NumOperands not set up?");
-  Op<-3>() = Fn;
-  Op<-2>() = IfNormal;
-  Op<-1>() = IfException;
+  Use *OL = OperandList;
+  OL[0] = Fn;
+  OL[1] = IfNormal;
+  OL[2] = IfException;
   const FunctionType *FTy =
     cast<FunctionType>(cast<PointerType>(Fn->getType())->getElementType());
   FTy = FTy;  // silence warning.
@@ -629,13 +623,12 @@
           (FTy->isVarArg() && NumArgs > FTy->getNumParams())) &&
          "Calling a function with bad signature");
 
-  Use *OL = OperandList;
   for (unsigned i = 0, e = NumArgs; i != e; i++) {
     assert((i >= FTy->getNumParams() || 
             FTy->getParamType(i) == Args[i]->getType()) &&
            "Invoking a function with a bad signature!");
     
-    OL[i] = Args[i];
+    OL[i+3] = Args[i];
   }
 }
 
diff --git a/lib/VMCore/Verifier.cpp b/lib/VMCore/Verifier.cpp
index 07439ef..721e96a 100644
--- a/lib/VMCore/Verifier.cpp
+++ b/lib/VMCore/Verifier.cpp
@@ -1483,7 +1483,7 @@
                 "Instruction does not dominate all uses!", Op, &I);
       }
     } else if (isa<InlineAsm>(I.getOperand(i))) {
-      Assert1((i == 0 && isa<CallInst>(I)) || (i + 3 == e && isa<InvokeInst>(I)),
+      Assert1(i == 0 && (isa<CallInst>(I) || isa<InvokeInst>(I)),
               "Cannot take the address of an inline asm!", &I);
     }
   }