[llvm] [llvm-profdata] Do not create numerical strings for MD5 function names read from a Sample Profile. (PR #66164)

[via llvm-commits]

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@@ -48,6 +52,8 @@ namespace llvm {
   /// lifetime extends past that of the StringRef. For this reason, it is not in
   /// general safe to store a StringRef.
   class LLVM_GSL_POINTER StringRef {
+    friend class llvm::sampleprof::ProfileFuncName;
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WenleiHe wrote:

This is no-go. ADT should stay clear of its users, and ProfiledFuncName should not need to access private members. 

https://github.com/llvm/llvm-project/pull/66164