PNaCl: Add ReplacePtrsWithInts pass for stripping out pointer types

lib/Transforms/NaCl/ExpandVarArgs.cpp

 //===- ExpandVarArgs.cpp - Expand out variable argument function calls-----===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This pass expands out all use of variable argument functions.
@@ skipping 47 matching lines @@
 
     virtual bool runOnModule(Module &M);
   };
 }
 
 char ExpandVarArgs::ID = 0;
 INITIALIZE_PASS(ExpandVarArgs, "expand-varargs",
                 "Expand out variable argument function definitions and calls",
                 false, false)
 
-static Instruction *CopyDebug(Instruction *NewInst, Instruction *Original) {
-  NewInst->setDebugLoc(Original->getDebugLoc());
-  return NewInst;
-}
-
 static void ExpandVarArgFunc(Function *Func) {
   Type *PtrType = Type::getInt8PtrTy(Func->getContext());
 
   FunctionType *FTy = Func->getFunctionType();
   SmallVector<Type *, 8> Params(FTy->param_begin(), FTy->param_end());
   Params.push_back(PtrType);
   FunctionType *NFTy = FunctionType::get(FTy->getReturnType(), Params, false);
 
   // In order to change the function's arguments, we have to recreate
   // the function.
@@ skipping 252 matching lines @@
       ExpandVarArgFunc(Func);
     }
   }
 
   return Changed;
 }
 
 ModulePass *llvm::createExpandVarArgsPass() {
   return new ExpandVarArgs();
 }