[llvm] DynamicAPInt: optimize size of structure (PR #97831)

[Nikita Popov via llvm-commits]

================
@@ -69,6 +73,9 @@ class SlowDynamicAPInt {
   /// Overload to compute a hash_code for a SlowDynamicAPInt value.
   friend hash_code hash_value(const SlowDynamicAPInt &X); // NOLINT
 
+  // Make DynamicAPInt a friend so it can access Val directly.
+  friend DynamicAPInt;
----------------
nikic wrote:

```suggestion
  friend class DynamicAPInt;
```

https://github.com/llvm/llvm-project/pull/97831