This is the mail archive of the gcc-patches@gcc.gnu.org mailing list for the GCC project.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: Fix twolf -funroll-loops -O3 miscompilation (a semi-latent web.c bug)

> On Fri, Oct 12, 2012 at 10:44 PM, Jan Hubicka <hubicka@ucw.cz> wrote:
> >  1) computing liveness with REG_EQUAL included prior RD that means a lot
> >     of shuffling of REG_DEAD notes
> 
> I was already working on a patch for this. I'll send it here later tonight.

Great, thanks!  This is probably most sensible approach even if we will need to
recompute liveness before/after webizer.

This bug really took me days to reduce into something sensible.  It tends to
reproduce only in terribly complex functions with many loops.

Honza
> 
> Ciao!
> Steven
Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]