[llvm] Store GUIDs in metadata (PR #133682)

[Owen Rodley via llvm-commits]

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@@ -67,9 +64,7 @@ class PGOContextualProfile {
 
   bool isInSpecializedModule() const;
 
-  bool isFunctionKnown(const Function &F) const {
-    return getDefinedFunctionGUID(F) != 0;
-  }
+  bool isFunctionKnown(const Function &F) const { return F.getGUID() != 0; }
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orodley wrote:

Good point. I'm not very familiar with this code, but it looks like this effectively only returns false for declarations? Everything else will get a GUID. I've changed to check that directly.

https://github.com/llvm/llvm-project/pull/133682