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Re: Deprecating basic asm in a function - What now?


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


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