[llvm] [IR] Allow nofree metadata to inttoptr (PR #153149)

[Nikita Popov via llvm-commits]

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@@ -8481,6 +8481,14 @@ specific. The behavior is undefined if the runtime memory address does
 resolve to an object defined in one of the indicated address spaces.
 
 
+'``nofree``' Metadata
+^^^^^^^^^^^^^^^^^^^^^
+
+The ``nofree`` metadata indicates the memory pointed by the pointer will not be
+freed after the attached instruction. This is analogous to the ``nofree``
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nikic wrote:

I'd probably drop the mention of the `nofree` attribute here, as that one has different semantics (function-local).

https://github.com/llvm/llvm-project/pull/153149