[Bug target/30961] [4.1/4.2 regression] redundant reg/mem stores/moves

["pluto at agmk dot net" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #18 from pluto at agmk dot net  2007-08-06 17:49 -------
(In reply to comment #17)
> (In reply to comment #16)
> > (In reply to comment #15)
> > > (In reply to comment #14)
> > > > (In reply to comment #13)
> > > > > Created an attachment (id=13550)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=13550&action=view) [edit]
> > > > > An experimental patch
> > > > > 
> > > > > This patch works for the testcase.
> > > > 
> > > > i've applied this patch to 4.2.1 and compile testcases:
> > > > 
> > > > convert/m32/m64 look fine. load/m32/m64 still look unoptimal.
> > > > 
> > > 
> > > Gcc 4.3 works:
> > 
> > naturally but its not even been released yet.
> > users awaiting regression fixes for released compilers ;)
> > 
> 
> Load is fixed by dataflow merge.
> 

Dear H.J.Lu,
i'm not asking about 4.3 because it's far away future
and dataflow merge won't be a part of next 4.2 release.
i understand that developers love to play with unstable tree
instead of backporting fixes but we're awaiting regression
fixes for released compilers. after 4.3 release you'll jump
to 4.4 and leave 4.3 regressions in the same way as you
left 4.2 regressions. so, how we can motivate the gcc team
to fix regressions in non-trunk tree? do you expect donations?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30961