diff --git a/include/llvm/ADT/APInt.h b/include/llvm/ADT/APInt.h
index 63bf4f6..56cd3cc 100644
--- a/include/llvm/ADT/APInt.h
+++ b/include/llvm/ADT/APInt.h
@@ -1426,6 +1426,8 @@
   return OS;
 }
 
+std::ostream &operator<<(std::ostream &o, const APInt &I);
+
 namespace APIntOps {
 
 /// @brief Determine the smaller of two APInts considered to be signed.
diff --git a/lib/Support/APInt.cpp b/lib/Support/APInt.cpp
index 73bf774..30dc352 100644
--- a/lib/Support/APInt.cpp
+++ b/lib/Support/APInt.cpp
@@ -2178,6 +2178,12 @@
   OS << S.c_str();
 }
 
+std::ostream &llvm::operator<<(std::ostream &o, const APInt &I) {
+  raw_os_ostream OS(o);
+  OS << I;
+  return o;
+}
+
 // This implements a variety of operations on a representation of
 // arbitrary precision, two's-complement, bignum integer values.
 
diff --git a/unittests/ADT/APIntTest.cpp b/unittests/ADT/APIntTest.cpp
index 8ff7d1d..648faf1 100644
--- a/unittests/ADT/APIntTest.cpp
+++ b/unittests/ADT/APIntTest.cpp
@@ -17,19 +17,6 @@
 
 namespace {
 
-// Make the Google Test failure output equivalent to APInt::dump()
-std::ostream& operator<<(std::ostream &OS, const llvm::APInt& I) {
-  llvm::raw_os_ostream raw_os(OS);
-
-  SmallString<40> S, U;
-  I.toStringUnsigned(U);
-  I.toStringSigned(S);
-  raw_os << "APInt(" << I.getBitWidth()<< "b, "
-         << U.c_str() << "u " << S.c_str() << "s)";
-  raw_os.flush();
-  return OS;
-}
-
 // Test that APInt shift left works when bitwidth > 64 and shiftamt == 0
 TEST(APIntTest, ShiftLeftByZero) {
   APInt One = APInt::getNullValue(65) + 1;