[Bug tree-optimization/47290] [4.5/4.6 Regression] memory exhausted compiling a destructor with an infinite 'for (;;);' loop

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47290

--- Comment #8 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-01-18 13:39:47 UTC ---
(In reply to comment #7)
> We could also limit the number of iterations:
>    int i;
> 
> -  for (i = 1; VEC_iterate (eh_landing_pad, cfun->eh->lp_array, i, lp); ++i)
> +  int len = VEC_length (eh_landing_pad, cfun->eh->lp_array) * 2;
> +  for (i = 1; 
> +       VEC_iterate (eh_landing_pad, cfun->eh->lp_array, i, lp) && i < len;
> +       i++)
>      if (lp)
>        changed |= cleanup_empty_eh (lp);

won't it still say "changed" and iterate in the caller?  Note that we could
avoid the above if we'd avoid generating new landing-pads and instead moved
the old ones.