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Date:   Mon, 8 Oct 2018 05:02:46 -0500
From:   Segher Boessenkool <segher@kernel.crashing.org>
To:     Richard Biener <rguenther@suse.de>
Cc:     Michael Matz <matz@suse.de>, Borislav Petkov <bp@alien8.de>,
        gcc@gcc.gnu.org, Nadav Amit <namit@vmware.com>,
        Ingo Molnar <mingo@redhat.com>, linux-kernel@vger.kernel.org,
        x86@kernel.org, Masahiro Yamada <yamada.masahiro@socionext.com>,
        Sam Ravnborg <sam@ravnborg.org>,
        Alok Kataria <akataria@vmware.com>,
        Christopher Li <sparse@chrisli.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "H. Peter Anvin" <hpa@zytor.com>, Jan Beulich <JBeulich@suse.com>,
        Josh Poimboeuf <jpoimboe@redhat.com>,
        Juergen Gross <jgross@suse.com>,
        Kate Stewart <kstewart@linuxfoundation.org>,
        Kees Cook <keescook@chromium.org>,
        linux-sparse@vger.kernel.org,
        Peter Zijlstra <peterz@infradead.org>,
        Philippe Ombredanne <pombredanne@nexb.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        virtualization@lists.linux-foundation.org,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Chris Zankel <chris@zankel.net>,
        Max Filippov <jcmvbkbc@gmail.com>,
        linux-xtensa@linux-xtensa.org
Subject: Re: PROPOSAL: Extend inline asm syntax with size spec
Message-ID: <20181008100245.GP29268@gate.crashing.org>
References: <20181003213100.189959-1-namit@vmware.com> <20181007091805.GA30687@zn.tnic> <20181007132228.GJ29268@gate.crashing.org> <alpine.LSU.2.21.1810071534220.7867@wotan.suse.de> <20181008073128.GL29268@gate.crashing.org> <alpine.LSU.2.20.1810081105350.16707@zhemvz.fhfr.qr>
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On Mon, Oct 08, 2018 at 11:07:46AM +0200, Richard Biener wrote:
> > All of a targets register names and alternative register names are
> > allowed in the clobber list.  Will that never conflict with an attribute
> > name?  We already *have* syntax for specifying attributes on an asm (on
> > *any* statement even), so mixing these two things has no advantage.
> 
> Heh, but I failed to make an example with attribute synatx working.
> IIRC attributes do not work on stmts.  What could work is to use
> a #pragma though.

Apparently statement attributes currently(?) only work for null statements.
Oh well.


Segher