[llvm] [InlineCost] Enable the cost benefit analysis for Sample PGO (PR #66457)

[Kazu Hirata via llvm-commits]

kazutakahirata wrote:

Thank you for the patch.  Do you have any details you can share?  Performance numbers?

With sample profiling, a lot of inlining is done in the sample profile loader.  Do you you see meaningful inlining opportunities left for `llvm/lib/Transforms/IPO/Inliner.cpp` for large applications, such as clang?


https://github.com/llvm/llvm-project/pull/66457