Segfault on O2 optimisation for test case for PR18689

[Andrew Pinski]

On May 12, 2005, at 11:55 AM, Tobias Schlüter wrote:

> Paul Thomas wrote:
>> In an earlier posting, I indicated that PR18689 could be fixed at the 
>> same
>> time as PR16939.  This problem involves dummy arguments being 
>> character
>> pointer arrays.  However, I have hit a FAIL on  the test program, 
>> when the
>> optimisation is O2 or better.
> ...
>> This is specific to actual arguments.  I guess the scalarisation loop 
>> is
>> broken in some way?
>
> I tried your patch together with Jakub's fix for PR15080, but the
> scalarization still goes wrong.  So it looks like you found a 
> different bug
> somewhere, the .original dump looks fine.  The bug is very fragile: 
> addding
> debug code makes the testcase pass.  Maybe we're dealing with a
> misoptimization for a change.

Does this fail with -O2 -fno-strict-aliasing.  I know there was a bug 
report
about wrong aliasing sets for some types (there is a testcase which is 
xfailed
because of it too).

Thanks,
Andrew Pinski