PNaCl: Add ReplacePtrsWithInts pass for stripping out pointer types

lib/Transforms/NaCl/ExpandUtils.cpp

 //===-- ExpandUtils.cpp - Helper functions for expansion passes -----------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
 #include "llvm/IR/BasicBlock.h"
@@ skipping 20 matching lines @@
     // incoming value.
     BasicBlock *BB = PN->getIncomingBlock(*U);
     for (unsigned I = 0; I < PN->getNumIncomingValues(); ++I) {
       if (PN->getIncomingBlock(I) == BB)
         PN->setIncomingValue(I, NewVal);
     }
   } else {
     U->getUser()->replaceUsesOfWith(U->get(), NewVal);
   }
 }
+
+Instruction *llvm::CopyDebug(Instruction *NewInst, Instruction *Original) {
+  NewInst->setDebugLoc(Original->getDebugLoc());
+  return NewInst;
+}