Re: HPPA and Squeeze

[Grant Grundler <grundler@parisc-linux.org>]

On Sat, Jun 20, 2009 at 06:25:20PM -0400, John David Anglin wrote:
> > > I've never been able to file any (non-automated) bug report in
> > > 5 minutes.  And if you don't even have direct access to the
> > > hardware it takes longer.
> > 
> > I agree. I'm trying to build netgen here too and if the ICE is easy to
> > reproduce, can make that available to danglin and add to the bugreport.  
> 
> There's no problem reproducing the ICE.

Indeed...already failed for me.

> I've pretty much localized the problem.  It's a GCC middle-end bug.
> The problem is in passing a complex double from a thunk.  The hppa
> specification says that values larger than 64 bits are passed by
> reference in the 32-bit runtime.  However, the value is in a pair
> of registers and not copied to memory.  This doesn't happen in calls
> from normal functions because the value gets copied to a stack slot.

I'm slightly confused about "stack slot". Could the "pass by reference"
refer to the address in the stack?

Anyway, thanks for quickly tracking this down.

grant

> 
> Dave
> -- 
> J. David Anglin                                  dave.anglin@nrc-cnrc.gc.ca
> National Research Council of Canada              (613) 990-0752 (FAX: 952-6602)