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From: Adrian Bentley <adruab@voria.com>
To: Eljay Love-Jensen <eljay@adobe.com>
Cc: gcc-help@gcc.gnu.org
Subject: Re: Weird optimization bug...?
Date: Thu, 03 Jun 2004 21:17:00 -0000	[thread overview]
Message-ID: <1086297425.18157.38.camel@localhost> (raw)
In-Reply-To: <6.0.3.0.2.20040603132957.02031898@iplan-mn.corp.adobe.com>

So I looked at the assembly and didn't find anything super glaring.  The
compiled code was very different, so I'm not surprised the result is
different.  I haven't gotten any closer to figuring out what kind of
mis-optimization it's doing (or if it's something else totally
bizarre).  Any other pointers for narrowing it down, or should I just
hack it and wait for a new version of gcc to come out :).

Thanks again,
Adruab

On Thu, 2004-06-03 at 11:36, Eljay Love-Jensen wrote:
> Hi Adruab.
> 
>  >However, if that was the case, inserting a random function into the code 
> certain shouldn't fix the problem :P.
> 
> Inserting a random function into the code can affect the optimizer, which 
> can mask the problem.
> 
> I recommend taking a look at the assembly file to see what's different 
> between having and not having the extra function present, in the optimized 
> code.
> 
> You can use the "-save-temps" to keep the assembly file around, and 
> "-fverbose-asm" for extra blather.
> 
> HTH,
> --Eljay
> 
> 
> 

  parent reply	other threads:[~2004-06-03 21:17 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-06-02 20:24 Adrian Bentley
2004-06-03 11:26 ` Eljay Love-Jensen
2004-06-03 17:24   ` Adrian Bentley
2004-06-03 18:37     ` Eljay Love-Jensen
2004-06-03 19:11       ` Adrian Bentley
2004-06-03 21:17       ` Adrian Bentley [this message]
2004-06-03 23:06       ` Adrian Bentley
2004-06-04  3:00         ` Ian Lance Taylor
2004-06-05 19:09           ` Adrian Bentley
2004-06-05 23:31             ` Ian Lance Taylor
2004-06-06  0:47             ` Ken Foskey
2004-06-05 20:21           ` Adrian Bentley
     [not found]             ` <m3aczh4m55.fsf@gossamer.airs.com>
2004-06-06 16:44               ` Adrian Bentley
2004-06-06 22:23                 ` Ian Lance Taylor
2004-06-03 19:13 lrtaylor

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