On Mon, Jun 20, 2016 at 03:49:19PM +0100, Andrew Haley wrote: > On 20/06/16 15:42, Segher Boessenkool wrote: > > On Mon, Jun 20, 2016 at 02:55:58PM +0100, Andrew Haley wrote: > >> On 20/06/16 14:50, Segher Boessenkool wrote: > >>> If basic asm is deprecated, that means some time later it will be > >>> removed, at which time an asm without : can be used as extended asm > >> > >> Not exactly: it'd be an asm with no inputs, no outputs, and no > >> clobbers i.e. no effects. > > > > I'm not sure what you mean? It will be treated exactly the same as > > basic asm (it is now, anyway). And it has an effect, it is volatile > > after all, not having any outputs? > > Well, you didn't say that it was volatile: and unless it really is > an asm volatile (not just an asm) an extended asm with no effects > is a statement with no effects.
An extended asm without outputs is always volatile (exactly because it would be useless otherwise). Segher
