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-rw-r--r--clang/unittests/Analysis/FlowSensitive/SingleVarConstantPropagationTest.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/clang/unittests/Analysis/FlowSensitive/SingleVarConstantPropagationTest.cpp b/clang/unittests/Analysis/FlowSensitive/SingleVarConstantPropagationTest.cpp
index de99f0111901..62ea155f10ec 100644
--- a/clang/unittests/Analysis/FlowSensitive/SingleVarConstantPropagationTest.cpp
+++ b/clang/unittests/Analysis/FlowSensitive/SingleVarConstantPropagationTest.cpp
@@ -34,6 +34,7 @@
#include "gtest/gtest.h"
#include <cstdint>
#include <memory>
+#include <optional>
#include <ostream>
#include <string>
#include <utility>