[llvm] [CSSPGO] Compute and report profile matching recovered callsites and samples (PR #79090)

[via llvm-commits]

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@@ -478,20 +505,31 @@ class SampleProfileMatcher {
                      std::map<LineLocation, StringRef> &IRAnchors);
   void findProfileAnchors(
       const FunctionSamples &FS,
-      std::map<LineLocation, std::unordered_set<FunctionId>>
-          &ProfileAnchors);
-  void countMismatchedSamples(const FunctionSamples &FS);
-  void countProfileMismatches(
-      const Function &F, const FunctionSamples &FS,
-      const std::map<LineLocation, StringRef> &IRAnchors,
-      const std::map<LineLocation, std::unordered_set<FunctionId>>
-          &ProfileAnchors);
-  void countProfileCallsiteMismatches(
-      const FunctionSamples &FS,
-      const std::map<LineLocation, StringRef> &IRAnchors,
+      std::map<LineLocation, std::unordered_set<FunctionId>> &ProfileAnchors);
+  // Record the callsite match states for profile staleness report, the result
+  // is saved in FuncCallsiteMatchStates.
+  void recordCallsiteMatchStates(
+      const Function &F, const std::map<LineLocation, StringRef> &IRAnchors,
       const std::map<LineLocation, std::unordered_set<FunctionId>>
           &ProfileAnchors,
-      uint64_t &FuncMismatchedCallsites, uint64_t &FuncProfiledCallsites);
+      const LocToLocMap *IRToProfileLocationMap);
+
+  bool isMismatchState(const enum MatchState &State) {
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WenleiHe wrote:

If checksum actually matches, do we expect any InitialMismatch from such functions? 

Or in other words, if checksum matches, there is no state change to track, do we actually still need to run `recordCallsiteMatchStates`? Can we just count how many samples, callsites and callsite samples in those functions and assume they all match? 



https://github.com/llvm/llvm-project/pull/79090