[llvm] [CFI][annotation] Leave alone function pointers in function annotations (PR #80173)

[Nikita Popov via llvm-commits]

================
@@ -531,6 +534,10 @@ class LowerTypeTestsModule {
   /// replace each use, which is a direct function call.
   void replaceDirectCalls(Value *Old, Value *New);
 
+  bool isFunctionAnnotation(Value *V) {
+    return FunctionAnnotations.count(V) != 0;
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nikic wrote:

```suggestion
    return FunctionAnnotations.contains(V);
```

https://github.com/llvm/llvm-project/pull/80173