[llvm] [SampleFDO] Stale profile renaming matching (PR #92151)

[via llvm-commits]

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@@ -58,6 +60,20 @@ class SampleProfileMatcher {
   StringMap<std::unordered_map<LineLocation, MatchState, LineLocationHash>>
       FuncCallsiteMatchStates;
 
+  struct RenameDecisionCacheHash {
+    uint64_t
+    operator()(const std::pair<const Function *, FunctionId> &P) const {
+      return hash_combine(P.first, P.second);
+    }
+  };
+  std::unordered_map<std::pair<const Function *, FunctionId>, bool,
+                     RenameDecisionCacheHash>
+      RenameDecisionCache;
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WenleiHe wrote:

is this the linter suggest format/style? 

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