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Re: MacIntel apps behaves weirdly when compiled with -02 not -01 - Almost solved(auto-vectorization issue)
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Re: MacIntel apps behaves weirdly when compiled with -02 not -01 - Almost solved(auto-vectorization issue)


  • Subject: Re: MacIntel apps behaves weirdly when compiled with -02 not -01 - Almost solved(auto-vectorization issue)
  • From: Olivier Tristan <email@hidden>
  • Date: Fri, 13 Jan 2006 20:13:21 +0100

On 1/13/06, Eric Albert <email@hidden> wrote:
> The issue Arvan mentions is known and not yet fixed.  I'm a little
> surprised that -ftree-vectorize is on by default at -O2, since the man
> page doesn't mention that.  Can you confirm that and, if it's true,
> file a bug report?
>
> By the way, we recommend using -Os rather than -O2 or -O3.  I'd suggest
> trying that instead.

Hi,

I'm now off fo vacation and no more have a mac.

But as far as I remember this is what is written as description in
xcode UI in project properties when you select the auto-vectorize
option. Can someone confirm this ?

Os do not remove some optims  as written in the doc ?
I don't reallly care if the binary is 10% bigger. Only CPU usage is
important in audio apps :)


Regards,


--
Olivier Tristan
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  • Follow-Ups:
    • Re: MacIntel apps behaves weirdly when compiled with -02 not -01 - Almost solved(auto-vectorization issue)
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References: 
 >MacIntel apps behaves weirdly when compiled with -02 not -01 (From: Olivier Tristan <email@hidden>)
 >Re: MacIntel apps behaves weirdly when compiled with -02 not -01 (From: Eric Albert <email@hidden>)
 >Re: MacIntel apps behaves weirdly when compiled with -02 not -01 - Almost solved(auto-vectorization issue) (From: Olivier Tristan <email@hidden>)
 >Re: MacIntel apps behaves weirdly when compiled with -02 not -01 - Almost solved(auto-vectorization issue) (From: Eric Albert <email@hidden>)

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