[clang] [flang] [llvm] Add IR Profile-Guided Optimization (IR PGO) support to the Flang compiler (PR #136098)

[Tarun Prabhu via cfe-commits]

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@@ -13,9 +13,14 @@
 #ifndef LLVM_FRONTEND_DRIVER_CODEGENOPTIONS_H
 #define LLVM_FRONTEND_DRIVER_CODEGENOPTIONS_H
 
+#include "llvm/ProfileData/InstrProfCorrelator.h"
+#include <string>
 namespace llvm {
 class Triple;
 class TargetLibraryInfoImpl;
+extern llvm::cl::opt<bool> DebugInfoCorrelate;
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tarunprabhu wrote:

Is it necessary to have this in a header? Is it used anywhere outside CodeGenOptions.cpp?

Please see the [visibility](https://llvm.org/docs/CodingStandards.html#restrict-visibility) section in the LLVM coding standards document for a discussion of this.

https://github.com/llvm/llvm-project/pull/136098