[Bug c++/23296] Combination of -finstrument-functions and -O3 produces incorrect results

["bart dot vanassche at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From bart dot vanassche at gmail dot com  2005-08-09 17:52 -------
Subject: Re:  Combination of -finstrument-functions and -O3 produces incorrect results

Hello pinskia,
 
     Thanks for the info -- I recompiled the code with the extra
option -fno-inline, and so I got the results I desired. The reason why
I am using -finstrument-functions is that I have written a profiler
that uses function instrumentation in order to detect which functions
are called during execution.
    I understand now why function instrumentation does not give
reliable execution information in combination with inlining. Maybe
it's wise to let gcc 4 produce a warning when both function
instrumentation and inlining are turned on, so that other developers
are informed about this behaviour ? My suggestion is to print the
following warning for the combination of function instrumentation and
inlining:
 
 Warning: function instrumentation does not work correctly when
inlining is turned on. Use -fno-inline to turn off inlining.
 
Regards,
 
 Bart Van Assche.

On 9 Aug 2005 11:45:47 -0000, pinskia at gcc dot gnu dot org
<gcc-bugzilla@gcc.gnu.org> wrote:
> 
> ------- Additional Comments From pinskia at gcc dot gnu dot org  2005-08-09 11:45 -------
> This is not a bug, this is how it works now in 4.0.0 and above with respect with the inliner.
> 
> --
>            What    |Removed                     |Added
> ----------------------------------------------------------------------------
>              Status|UNCONFIRMED                 |RESOLVED
>          Resolution|                            |INVALID
> 
> 
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23296
> 
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> You reported the bug, or are watching the reporter.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23296