[llvm] r212443 - CodeGen: it turns out that NAND is not the same thing as BIC. At all.

[Duncan Sands]

Hi Cameron,
> I do not often modify the docs, so please feel free to critique harshly. ;)
>
> A small patch is attached.

> Index: ReleaseNotes.rst
> ===================================================================
> --- ReleaseNotes.rst	(revision 212617)
> +++ ReleaseNotes.rst	(working copy)
> @@ -59,6 +59,9 @@
>  * The prefix for loop vectorizer hint metadata has been changed from
>    ``llvm.vectorizer`` to ``llvm.loop.vectorize``.
>
> +* Some backends previously implemented Atomic NAND as NEGATE-and-AND. The
> +  semantics of this operation have been updated to NOT-AND.
> +
>  .. NOTE
>     For small 1-3 sentence descriptions, just add an entry at the end of
>     this list. If your description won't fit comfortably in one bullet

I suggest you say something like:

   * Some backends previously implemented Atomic NAND as NEGATE-and-AND.  Now all
     backends implement it as NOT-AND, matching the semantics of GCC 4.4 and later.

Ciao, Duncan.