[Bug middle-end/39509] bad optimization(?) pure virtual function call with -O2

[rguenther at suse dot de]

------- Comment #12 from rguenther at suse dot de  2009-05-11 13:10 -------
Subject: Re:  bad optimization(?) pure virtual function
 call with -O2

On Mon, 11 May 2009, jwakely dot gcc at gmail dot com wrote:

> ------- Comment #11 from jwakely dot gcc at gmail dot com  2009-05-11 13:09 -------
> It does seem to be a regression.  I preprocessed the program in comment 4 with
> GCC version 4.1.2 20071124 (Red Hat 4.1.2-42), then ran uninclude to produce a
> standalone testcase and compiled it with different versions of GCC
> 
> GCC 4.1.1 (FSF) at -O3 doesn't call the pure virtual.
> GCC 4.1.2 (Red Hat) at -O3 doesn't call the pure virtual.
> GCC 4.2.2 (FSF) at -O3 calls the pure virtual.
> GCC 4.3.2 (FSF) can't compile the program (again, due to Boost's heavy use of
> preprocessor checks)
> 
> Do you want that unincluded testcase attached?

No, that's enough info.

Richard.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39509