Re: adding -fnoalias ... would a patch be accepted ?

[torbenh <torbenh@gmx.de>]

On Wed, Jan 06, 2010 at 04:45:06PM +0100, Richard Guenther wrote:
> >> I don't see a restrict qualified pointer here.  Note that the
> >> restrict attribute would only disambiguate against those.
> >> Also I think you need the restrict attribute on the Mixer
> >> objects, not its members.
> >
> > so the attribute would promote down to all member vars of
> > member objects ?
> 
> Yes.  In fact the example above would work I guess.

confirmed. works nicely.
although it would be nice, if this would also
apply to FIELD_DECL.

i am not sure if this is really possible.
is the structure hierarchy still available at that layer ?

thanks for your help so far.




> 
> >
> >> > i still dont understand whats the problem with -fnolias,
> >> > as in attached patch.
> >>
> >> The patch will miscompile everything.
> >
> > point taken.
> > obviously reading code for a few hours without knowing enough about the
> > code isnt enough :)
> >
> > __attribute__((restrict)) is the better solution.
> > although not portable to other compilers.
> >
> > but i need this kind of functionality now, to test my concepts.
> > thats why i am spending a bit time on this.
> >
> > when do you plan to add this feature ?
> 
> For GCC 4.6 earliest.

hmm... bah :)


-- 
torben Hohn