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Re: Effect of -fno-reorder-blocks?
- From: Jeff Law <law at porcupine dot cygnus dot com>
- To: Hans-Peter Nilsson <hans-peter dot nilsson at axis dot com>
- Cc: dnovillo at redhat dot com, aj at suse dot de, gcc at gcc dot gnu dot org
- Date: Mon, 18 Nov 2002 14:00:18 -0700
- Subject: Re: Effect of -fno-reorder-blocks?
- Reply-to: law at redhat dot com
In message <200211182045.gAIKjin2021714@ignucius.axis.se>, Hans-Peter Nilsson w
rites:
>> Date: Mon, 18 Nov 2002 15:23:08 -0500
>> From: Diego Novillo <dnovillo@redhat.com>
>
>> > FWIW, I see only that change in the SPEC95 results. Nothing
>> >
>> Since I'm not tracking mainline with the SPEC2000 runs I didn't
>> think they would interest you. I can add it for tonight's run if
>> you'd like.
>
>Thanks but I don't think that's necessary. I think the SPEC95
>results are conclusive: the effect of -f(no-)reorder-blocks is
>minimal for this machine (PIII).
I'd expect reorder-blocks to have the most effect on targets that do static
prediction of branches (such at BTFNT). These schemes still show up in
embedded systems (and of course older desktops like the PA1.1 based
targets).
jeff