Re: Possible optimizer bug on sparc-solaris?

[Warren_Baird at cimmetry dot com]

Hi Eric,

thanks for your response...

> No, this would be a sheer waste of time. We really need a (small if
> possible) self-contained testcase in order to debug the compiler.

I figured that...   Unfortunately it seems to be really dependant on memory
layout...  Adding a printf anywhere in the function moves the assignment to %o7,
as did many other small changes I made while trying to track the bug down - it's
probably going to be really hard to build a self-contained test-case...  I'm
afraid that I won't even have time to try and build a test-case for a couple of
weeks at least...

> > Is there perhaps a way to tell the optimizer to just ignore register
> > %o7 when optimizing?  It might hurt performance a little, but if it
> > avoids crashes like this it might be worth it to us.
>
> It would be better to pinpoint and fix the real bug.

I agree whole-heartedly...  Unfortunately we're stabilizing our code for a
release right now, and I'm worried that there may be other places in our code
where this is happening...  I could back off to -O1 for the entire code base,
but I'd rather not do that.  Is there I way we can disable %o7 until was have a
proper fix for the bug?

Thanks,

Warren