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Re: "-fno-unswitch-loops" option have no effect?
- From: Bernd Roesch <nospamname at gmx dot de>
- To: ami_stuff <ami_stuff at o2 dot pl>, Martin Guy <martinwguy at gmail dot com>
- Cc: gcc at gcc dot gnu dot org
- Date: Mon, 17 Aug 2009 16:50:11 +0200
- Subject: Re: "-fno-unswitch-loops" option have no effect?
Hello ami_stuff
On 17.08.09, you wrote:
> Hi,
>
>> Hundreds and hundreds of people read this list, so every low-detail
>> "I think there may be a bug" message you send wastes hours of other
>> people's time.
>
> Ok, Ok, but if someone will reproduce the same problem on his system I can
> fill bugreport, otherwise I will only waste my time, hours of my time, to
> start detailed bugreport. Maybe this is only fault of my GCC's build?
gcc > 4 AOS 68k builds are build from offical gcc sourcetree and there are
no changes
>
>> If it *is* a bug, on the bug tracker, it will be picked up by people
>> interested in that specific area
>
> It may takes months before someone will look at the bugreport. If it's
> really a bug IMHO it's a bit critical bug.
>
>> though you don't seem to do much
>> in-depth research, nor do you supply any detail of what you did and
>> what you expected.
>
> There is no need for much detail, just compile any bigger sourcecode with
> -O3 -fno-.. and after that with -O2 .... When the object files are not
> identical, something is wrong and I can start a bug report.
how much is size diffrent ?
You use
-finline-functions -fpredictive-commoning -fgcse-after-reload
-ftree-vectorize
right ?
I see in Gcc source that there is more set on -O3.
flag_ipa_cp_clone = opt3;
if (flag_ipa_cp_clone)
flag_ipa_cp = 1;
.but i
think you can easy test, compile the ffmpeg, if it give no internal
compiler error with -fno........ then it work.
here is from source opt.c what is set on opt3
opt3 = (optimize >= 3);
flag_predictive_commoning = opt3;
flag_inline_functions = opt3;
flag_unswitch_loops = opt3;
flag_gcse_after_reload = opt3;
flag_tree_vectorize = opt3;
flag_ipa_cp_clone = opt3;
if (flag_ipa_cp_clone)
flag_ipa_cp = 1;
>
> Regards
>
Regards