snehasish wrote:

> The major motivation is to detect dead functions for the services that are 
> optimized with sampling PGO.

For your use case, can you use 
[ProfileSymbolList](https://github.com/llvm/llvm-project/blob/32ffc9fdc2cd422c88c926b862adb3de726e3888/llvm/include/llvm/ProfileData/SampleProf.h#L1509-L1512)
 to identify very cold functions (executed but unsampled) or are you indeed 
looking for functions that are never executed?

Will this be used to guide developers with diagnostics or more aggressive 
compiler driven optimizations?

https://github.com/llvm/llvm-project/pull/109837
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