[llvm] [clang] [Clang] Emit TBAA info for enums in C (PR #73326)

[Paul Walker via cfe-commits]

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@@ -6376,13 +6376,26 @@ aliases a memory access with an access tag ``(BaseTy2, AccessTy2,
 Offset2)`` if either ``(BaseTy1, Offset1)`` is reachable from ``(Base2,
 Offset2)`` via the ``Parent`` relation or vice versa.
 
+In C an enum will be compatible with an underlying integer type that is large
+enough to hold all enumerated values. In most cases this will be an ``int``,
+which is the default when no type is specified. However, if an ``int`` is not
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paulwalker-arm wrote:

I don't think this information belongs in the LangRef, especially as it doesn't add any value to the underlying description of what the metadata represents.

https://github.com/llvm/llvm-project/pull/73326