[llvm] [StaticDataLayout][PGO]Implement reader and writer change for data access profiles (PR #139997)

[Snehasish Kumar via llvm-commits]

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@@ -28,6 +29,7 @@
 #include "llvm/Support/raw_ostream.h"
 #include <cstdint>
 #include <ctime>
+#include <functional>
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snehasish wrote:

Why do we need functional?

https://github.com/llvm/llvm-project/pull/139997