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-rw-r--r--clang/unittests/Analysis/FlowSensitive/TransferBranchTest.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/clang/unittests/Analysis/FlowSensitive/TransferBranchTest.cpp b/clang/unittests/Analysis/FlowSensitive/TransferBranchTest.cpp
index 9f3228d54ce1..4aadf75fe258 100644
--- a/clang/unittests/Analysis/FlowSensitive/TransferBranchTest.cpp
+++ b/clang/unittests/Analysis/FlowSensitive/TransferBranchTest.cpp
@@ -19,6 +19,7 @@
#include "llvm/Testing/Annotations/Annotations.h"
#include "llvm/Testing/Support/Error.h"
#include "gtest/gtest.h"
+#include <optional>
namespace clang::dataflow::test {
namespace {