[clang] [llvm] [Clang] Add __builtin_assume_dereferenceable to encode deref assumption. (PR #121789)

[Florian Hahn via llvm-commits]

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@@ -2761,6 +2761,47 @@ etc.).
 
 Query for this feature with ``__has_builtin(__builtin_assume_separate_storage)``.
 
+``__builtin_assume_dereferenceable``
+-------------------------------------
+
+``__builtin_assume_dereferenceable`` is used to provide the optimizer with the
+knowledge that the pointer argument P is dereferenceable up to the specified
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fhahn wrote:

That has been adjusted a while ago, thanks!

https://github.com/llvm/llvm-project/pull/121789