RE: _Cilk_spawn and _Cilk_sync for C++

[Iyer, Balaji V]

> 
> >         case CILK_SPAWN_STMT:
> >           gcc_assert
> >             (fn_contains_cilk_spawn_p (cfun)
> >              && lang_hooks.cilkplus.cilk_detect_spawn_and_unwrap (expr_p));
> >           if (!seen_error ())
> >             {
> >               ret = (enum gimplify_status)
> >                 lang_hooks.cilkplus.gimplify_cilk_spawn (expr_p, pre_p,
> >                                                          post_p);
> >               break;
> >             }
> >           /* If errors are seen, then just process it as a CALL_EXPR.
> > */
> 
> Please remove these langhooks and instead add handling of
> CILK_SPAWN_STMT to c_gimplify_expr and cp_gimplify_expr.
> 
Hi Jason,
        I really cannot do this because if the spawned function returns a 
value, the whole expression must be pushed into the spawn helper. Thus, this 
lang_hooks function is called in the gimplify_modify_expr and a couple other 
places.

E.g.  In:

x = _Cilk_spawn func ()

The spawn helper should contain:

x = func ();

Thanks,

Balaji V. Iyer.