diff --git a/llvm/lib/CodeGen/MachineInstrAnnot.cpp b/llvm/lib/CodeGen/MachineInstrAnnot.cpp
deleted file mode 100644
index 9dd684c1cc06..000000000000
--- a/llvm/lib/CodeGen/MachineInstrAnnot.cpp
+++ /dev/null
@@ -1,72 +0,0 @@
-//===-- MachineInstrAnnot.cpp ---------------------------------------------===//
-// 
-//                     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 file defines Annotations used to pass information between code
-//  generation phases.
-// 
-//===----------------------------------------------------------------------===//
-
-#include "../Target/SparcV9/MachineInstrAnnot.h"
-#include "../Target/SparcV9/SparcV9TmpInstr.h"
-#include "llvm/CodeGen/MachineCodeForInstruction.h"
-#include "llvm/Instructions.h"
-#include "llvm/Type.h"
-using namespace llvm;
-
-CallArgsDescriptor::CallArgsDescriptor(CallInst* _callInstr,
-                                       TmpInstruction* _retAddrReg,
-                                       bool _isVarArgs, bool _noPrototype)
-  : callInstr(_callInstr),
-    funcPtr(isa<Function>(_callInstr->getCalledValue())
-            ? NULL : _callInstr->getCalledValue()),
-    retAddrReg(_retAddrReg),
-    isVarArgs(_isVarArgs),
-    noPrototype(_noPrototype) {
-  unsigned int numArgs = callInstr->getNumOperands();
-  argInfoVec.reserve(numArgs);
-  assert(callInstr->getOperand(0) == callInstr->getCalledValue()
-         && "Operand 0 is ignored in the loop below!");
-  for (unsigned int i=1; i < numArgs; ++i)
-    argInfoVec.push_back(CallArgInfo(callInstr->getOperand(i)));
-
-  // Enter this object in the MachineCodeForInstr object of the CallInst.
-  // This transfers ownership of this object.
-  MachineCodeForInstruction::get(callInstr).setCallArgsDescriptor(this); 
-}
-
-CallInst *CallArgsDescriptor::getReturnValue() const {
-  return (callInstr->getType() == Type::VoidTy? NULL : callInstr);
-}
-
-// Mechanism to get the descriptor for a CALL MachineInstr.
-// We get the LLVM CallInstr from the ret. addr. register argument
-// of the CALL MachineInstr (which is explicit operand #3 for indirect
-// calls or the last implicit operand for direct calls).  We then get
-// the CallArgsDescriptor from the MachineCodeForInstruction object for
-// the CallInstr.
-// This is roundabout but avoids adding a new map or annotation just
-// to keep track of CallArgsDescriptors.
-// 
-CallArgsDescriptor *CallArgsDescriptor::get(const MachineInstr* MI) {
-  const TmpInstruction* retAddrReg =
-    cast<TmpInstruction>(isa<Function>(MI->getOperand(0).getVRegValue())
-                         ? MI->getImplicitRef(MI->getNumImplicitRefs()-1)
-                         : MI->getOperand(2).getVRegValue());
-
-  assert(retAddrReg->getNumOperands() == 1 &&
-         isa<CallInst>(retAddrReg->getOperand(0)) &&
-         "Location of callInstr arg for CALL instr. changed? FIX THIS CODE!");
-
-  const CallInst* callInstr = cast<CallInst>(retAddrReg->getOperand(0));
-
-  CallArgsDescriptor* desc =
-    MachineCodeForInstruction::get(callInstr).getCallArgsDescriptor(); 
-  assert(desc->getCallInst()==callInstr && "Incorrect call args descriptor?");
-  return desc;
-}