From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christopher Li <sparse@chrisli.org>
Subject: Re: [PATCH v2] implement constant-folding in __builtin_bswap*()
Date: Tue, 22 Nov 2016 19:39:37 +0800
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To: Johannes Berg <johannes@sipsolutions.net>
Cc: Linux-Sparse <linux-sparse@vger.kernel.org>

On Tue, Nov 22, 2016 at 7:13 PM, Christopher Li <sparse@chrisli.org> wrote:
> On Mon, Nov 21, 2016 at 5:45 PM, Johannes Berg
> <johannes@sipsolutions.net> wrote:
>> Yes, that'd make some sense. I have no idea how to pull it off though
>
> I take a brief look.
>
> It seems that you need to implement a symbol with ".expand" implement as
> "expand_bswap", similar to "expand_constant_p".

Never mind that, I just find out expand stage happen after the evaluation
stage. The warning happen in the evaluation stage. It will need to make some
plan change to get it right.

Chris