diff --git a/llvm/lib/Bitcode/Reader/DeserializeAPInt.cpp b/llvm/lib/Bitcode/Reader/DeserializeAPInt.cpp
new file mode 100644
index 0000000..af942fb
--- /dev/null
+++ b/llvm/lib/Bitcode/Reader/DeserializeAPInt.cpp
@@ -0,0 +1,33 @@
+//===-- DeserializeAPInt.cpp - Deserialization for APInts ------*- C++ -*--===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by Ted Kremenek and is distributed under the
+// University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements deserialization of APInts.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/APInt.h"
+#include "llvm/Bitcode/Deserialize.h"
+#include <cassert>
+
+using namespace llvm;
+
+void APInt::Read(Deserializer& D) {
+  BitWidth = D.ReadInt();
+  
+  if (isSingleWord())
+    VAL = D.ReadInt();
+  else {
+    uint32_t NumWords = D.ReadInt();
+    assert (NumWords > 1);
+    pVal = new uint64_t[NumWords];
+    assert (pVal && "Allocation in deserialization of APInt failed.");
+    for (unsigned i = 0; i < NumWords; ++i)
+      pVal[i] = D.ReadInt();    
+  }
+}