1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/unittests/ADT/APIntTest.cpp b/llvm/unittests/ADT/APIntTest.cpp
index b306a6d..3055581 100644
--- a/llvm/unittests/ADT/APIntTest.cpp
+++ b/llvm/unittests/ADT/APIntTest.cpp
@@ -13,6 +13,7 @@
 #include "llvm/ADT/Twine.h"
 #include "gtest/gtest.h"
 #include <array>
+#include <optional>
 
 using namespace llvm;
 
@@ -2956,7 +2957,7 @@ TEST(APIntTest, GetMostSignificantDifferentBit) {
 
 TEST(APIntTest, GetMostSignificantDifferentBitExaustive) {
   auto GetHighestDifferentBitBruteforce =
-      [](const APInt &V0, const APInt &V1) -> llvm::Optional<unsigned> {
+      [](const APInt &V0, const APInt &V1) -> std::optional<unsigned> {
     assert(V0.getBitWidth() == V1.getBitWidth() && "Must have same bitwidth");
     if (V0 == V1)
       return std::nullopt; // Bitwise identical.