Re: Apple's -fast option for gcc

[Andreas Jaeger <aj at suse dot de>]

Jim Wilson <wilson@specifixinc.com> writes:

> Mike Stump wrote:
>> -fast is very, very small.  It just turns on 5-25 other, existing
>> flags.  There isn't a reason why it could not be contributed.  Do
>> others want it?  It is _good_ for SPEC.
>
> The set of options that gives best performance on SPEC for a PPC970 is
> unlikely to be right for other targets or for other programs.  So what
> exactly does -fast mean when that is considered?  How do we choose
> which options to include?  Apple probably doesn't want to sacrifice
> SPEC performance to make the option useful to others, so perhaps it
> makes more sense to rename it to something like -mfast-spec to make it
> clear that it is target dependent, and is the set of options that is
> known to give best SPEC performance.

-fast has to be target specific.  And I won't mind adding for some
targets a -mfast-spec to make this clear.  I just think we should do
it the same everywhere.  If we support -fast, I'll contribute some
Opteron settings ;-)

Andreas
-- 
 Andreas Jaeger, aj@suse.de, http://www.suse.de/~aj
  SuSE Linux AG, Deutschherrnstr. 15-19, 90429 Nürnberg, Germany
   GPG fingerprint = 93A3 365E CE47 B889 DF7F  FED1 389A 563C C272 A126

Attachment: pgp00000.pgp
Description: PGP signature