Re: [RFC] asm goto

[Sylvain Pion <Sylvain dot Pion at sophia dot inria dot fr>]

Richard Henderson wrote:
> On 08/30/2009 08:16 AM, Sylvain Pion wrote:
> > GCC is already going slightly beyond this, because it's accepting
> > more than a string-literal. But that's relatively minor.
> >
> > However, using "asm goto" outside the parentheses goes further in
> > terms of syntax extension, and I'm not convinced that the need
> > justifies it.
>
> GCC already accepts volatile outside the parenthesis too.

Right, I had forgotten about it.

> I'm not sure what your point really is.

Just minimizing the amount of syntax extension of GCC.

> > Moreover, the syntax of asms being already not so easy to understand,
> > I would like to suggest moving the "goto" inside the asm, so that one
> > easily sees which arguments are labels (a kind of "named argument").
> > Something like the following :
> >
> > asm ("..." : ... : ... : ... : goto (label-list) );
> >
> > Has this option been considered ?
>
> No, I hadn't thought of this.  I suppose it would be trivial
> to change the grammar in this way, if a majority think it's
> worthwhile.  I personally don't see anything wrong with what
> I have implemented at present.

I don't have a strong position on this issue, I just wanted
to make this remark in case others cared.

--
Sylvain Pion
INRIA Sophia-Antipolis
Geometrica Project-Team
CGAL, http://cgal.org/