[llvm] [SampleFDO] Stale profile call-graph matching (PR #92151)

[via llvm-commits]

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@@ -160,6 +201,48 @@ class SampleProfileMatcher {
   void runStaleProfileMatching(const Function &F, const AnchorMap &IRAnchors,
                                const AnchorMap &ProfileAnchors,
                                LocToLocMap &IRToProfileLocationMap);
+  /// Find the existing or new matched function using the profile name.
+  ///
+  /// \returns The function pointer.
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WenleiHe wrote:

why using `///` style comment, while existing code in this file all use `//` style comment.

Also some comments has `param` sections while others don't. I would suggest simple `//` style comment. 

https://github.com/llvm/llvm-project/pull/92151