Implementing OpenMP pragmas for the C front end

[Steven Bosscher]

Op vr 07-02-2003, om 23:18 schreef Neil Booth:
> Steven Bosscher wrote:-
> 
> > GCC right now only has pragmas that do not put restrictions on the
> > language elements surrounding the pragmas.  AFAICT most pragmas have
> > their effect over the whole translation unit.
> 
> Right.  Really, for things like expressions (possibly functions,
> depending on your IR) that are affected by C99 pragmas, there really
> needs to be bits on their representation that gives the state of said
> pragmas at that time in the soure file.  It isn't hard to do I think.
> 
> > ----------
> > /* ERROR - The flush directive cannot be the immediate
> >  * substatement of an if statement. */
> > if (x!=0)
> >   #pragma omp flush (x)
> 
> Surely not.  I think this is a *really really* bad idea; I wouldn't
> support it going into GCC.  It's simply not the way C and C++ work.
> 
> > if (x!=0)
> >   {
> >     #pragma omp flush (x)
> >   }
> 
> Ugh.  Which @#$&*( thought of this?
> 

Ehhr... This was copied verbatim from the OpenMP 2.0 specs for C/C++ :-)

Greetz
Steevn