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

[Teresa Johnson 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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teresajohnson wrote:

Looks like getGUID will assert if there is no metadata, so will this function work as intended? Looks like most of the uses are themselves in asserts, but there is one non-assert call.

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