[llvm] [MemProf] Handle missing tail call frames (PR #75823)

[Snehasish Kumar via llvm-commits]

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@@ -630,6 +682,16 @@ class IndexCallsiteContextGraph
   std::map<const FunctionSummary *, ValueInfo> FSToVIMap;
 
   const ModuleSummaryIndex &Index;
+  function_ref<bool(GlobalValue::GUID, const GlobalValueSummary *)>
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snehasish wrote:

Spell out llvm::function_ref (since there exists std::function_ref too)?

https://github.com/llvm/llvm-project/pull/75823