[Bug c++/13768] [3.4/3.5 Regression] -funit-at-a-time compiles unused inline function

["hubicka at ucw dot cz" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From hubicka at ucw dot cz  2004-02-03 11:00 -------
Subject: Re:  [3.4/3.5 Regression] -funit-at-a-time compiles unused inline function

> 
> ------- Additional Comments From mmitchel at gcc dot gnu dot org  2004-02-03 09:25 -------
> The code is indeed invalid.
> 
> When a complete object of type X<int> is created, the compiler is allowed to
> emit the vtable for X, and that permits instantiating the virtual functions.
> 
> However, this is an optimization deficiency in -funit-at-a-time.

Yes, the problem is that all dependencies are resolved before
optimization is done.  I am planning to address this by doing early pass
of tree-ssa optimization before inlining and cgraph construction.  That
way we should catch majority of cases.
I also plan to deffer output of datastrctures to the very end of
compilation and use information about what was really used by backend.

Honza
> 
> I've therefore assigned the bug to Jan.
> 
> -- 
>            What    |Removed                     |Added
> ----------------------------------------------------------------------------
>          AssignedTo|unassigned at gcc dot gnu   |jh at suse dot cz
>                    |dot org                     |
>              Status|NEW                         |ASSIGNED
> 
> 
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13768
> 
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13768