[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:

This is only called during counting (post-match), so we should not expect any Initial* state. 

Can we assert somewhere during counting that we do not have any initial* state? If we have that means `recordCallsiteMatchStates` may have a bug. 

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