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-rw-r--r--clang/lib/Analysis/CalledOnceCheck.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/clang/lib/Analysis/CalledOnceCheck.cpp b/clang/lib/Analysis/CalledOnceCheck.cpp
index 896562ca3bb4..d68182dd5b5c 100644
--- a/clang/lib/Analysis/CalledOnceCheck.cpp
+++ b/clang/lib/Analysis/CalledOnceCheck.cpp
@@ -38,6 +38,7 @@
#include "llvm/Support/Compiler.h"
#include "llvm/Support/ErrorHandling.h"
#include <memory>
+#include <optional>
using namespace clang;