[Bug tree-optimization/61034] Optimizing takes too many passes

["rguenther at suse dot de" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61034

--- Comment #6 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 5 May 2014, glisse at gcc dot gnu.org wrote:

> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61034
> 
> --- Comment #5 from Marc Glisse <glisse at gcc dot gnu.org> ---
> (In reply to Richard Biener from comment #4)
> > you might want to check whether that improves things and point me to stuff
> > that is left (FRE related).
> 
> The fre2 dump looks much nicer (the .optimized dump is a bit surprising, I
> would need more time to look at it). It is not sufficient, but it clearly
> helps.
> 
> In the fre2 dump, I still see (skipping many lines, I may have skipped some
> essential ones):
> 
>   D.2325.o = _4;
>   D.2325.o = _101;
>   _105 = _4;
>   __builtin_free (_105);
>   _96 = D.2325.o;
> 
> (instead of _96 = _101)

that's a conditional assignment AFAICS