[PATCH] D132186: Clang: Add a new flag Wmisnoinline for printing hot noinline functions

[Paul Kirth via Phabricator via llvm-commits]

paulkirth added a comment.

@iamarchit123 I think the standard advice is to start w/ the llvm-test-suite and then explore other benchmarks as needed. Also, Clang itself is often a very good starting point.

As for profiles, it probably won't be representative, but you could collect the profile using your benchmark and then assess how often the mismatch w/ inlining happens. if you want to do it w/ Clang itself, then a common approach I've heard is to record have Clang build your project and then use ninja trace or equivalent to find the 5-10 TUs w/ the longest compile time. Then stick them in the https://github.com/llvm/llvm-project/tree/main/clang/utils/perf-training directory, which will use them for PGO automatically. If you go that route, you may need to preprocess the source files.


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