On Mon, Oct 15, 2018 at 10:45:08PM +0300, Alexander Monakov wrote:
> On Mon, 15 Oct 2018, Segher Boessenkool wrote:
> > On Sun, Oct 14, 2018 at 11:07:20PM +0300, Alexander Monakov wrote:
> > > For Basic asms, no similar mechanism is necessary since they are
> > > antithetical
> > > to efficiency in the first place.
> >
> > I missed this part.
> >
> > asm("bla");
> >
> > means almost the same as
> >
> > asm("bla" : );
> >
> > and there is nothing in there that is bad for optimisation.
>
> The extended asm does not clobber all memory, unlike its basic counterpart.
Yeah, that's new in GCC 7, and I keep forgetting. I'm still in the
denial phase for this.
Segher
