1 files changed, 7 insertions, 0 deletions
diff --git a/unittests/Support/ConstantRangeTest.cpp b/unittests/Support/ConstantRangeTest.cpp
index f377b6f068..56f315a09a 100644
--- a/unittests/Support/ConstantRangeTest.cpp
+++ b/unittests/Support/ConstantRangeTest.cpp
@@ -16,6 +16,13 @@ using namespace llvm;
 
 namespace {
 
+// Support APInt output to an std::ostream.
+inline std::ostream &operator<<(std::ostream &OS, const APInt &Value) {
+  raw_os_ostream RawOS(OS);
+  RawOS << Value;
+  return OS;
+}
+
 class ConstantRangeTest : public ::testing::Test {
 protected:
   static ConstantRange Full;