optimization/9279: [3.2 regression] [Sparc] combine bug

[Matthias Klose]

Gabriel Dos_Reis writes:
> | Eric Botcazou writes:
> | > >     The fix introduces a performance regression for PowerPC (and possibly
> | > > other platforms) on the 3.2 branch.
> | > 
> | > Now reverted for this reason on the 3.2 branch so GCC 3.2.2 will ship with 
> | > the bug.
> | 
> | I see you having the choice between two regressions, one performance
> | regression (from 3.2.1 to 3.2.2) and one "wrong code" regression (from
> | 2.95 and 3.0.4 to 3.2.2). Not sure, if I should like your decision.
> 
> As I explained to Eric, I would have been pleased to apply that
> patch.  However it turned out that it introduces (1) a performance
> regression; (2) possibly a wrong code generation -- David gave some
> references.  Therefore, to fix the new regressions we would have to grab 
> other patches not known to be safe.  The initial patch was beginning
> to have too much ramifications.  That is why I asked Eric to revert
> his patch.

Thanks for the clarification, I did miss this information on the gnats
report.