[llvm] [CGData] Lazy loading support for stable function map (PR #151660)

[Kyungwoo Lee via llvm-commits]

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@@ -99,6 +119,13 @@ struct StableFunctionMap {
   /// \returns true if there is no stable function entry.
   bool empty() const { return size() == 0; }
 
+  bool contains(HashFuncsMapType::key_type FunctionHash) const {
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kyulee-com wrote:

Add a comment with ///.

https://github.com/llvm/llvm-project/pull/151660