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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">People ask about this from time to time, but we've never done anything about it.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">One thing I noticed about GCC –Og is that it's 99% identical to their –O1. I'd be curious about people's experience using Clang –O1 –g and whether that experience
is somewhere close to reasonable.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">--paulr<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> cfe-dev-bounces@cs.uiuc.edu [mailto:cfe-dev-bounces@cs.uiuc.edu]
<b>On Behalf Of </b>David Blaikie<br>
<b>Sent:</b> Wednesday, July 29, 2015 10:13 AM<br>
<b>To:</b> Dan Walmsley; cfe-dev Developers<br>
<b>Subject:</b> Re: [cfe-dev] Clangs equivalent to GCCs -Og flag?<o:p></o:p></span></p>
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<p class="MsoNormal">On Wed, Jul 29, 2015 at 8:42 AM, Dan Walmsley <<a href="mailto:dan@walms.co.uk" target="_blank">dan@walms.co.uk</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Thanks, <o:p></o:p></p>
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<p class="MsoNormal"> Perhaps there might be some documentation somewhere that would give me an idea of which optimizations to enable individually?<o:p></o:p></p>
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<p class="MsoNormal"><br>
Not really - optimized debug info is still pretty lacking in Clang. Even the most common/basic optimizations (SROA, for example) are going to pretty heavily impact debuggability today.<br>
<br>
- Dave<br>
<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Dan<o:p></o:p></p>
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<p class="MsoNormal">Date: Wed, 29 Jul 2015 06:40:06 -0700<br>
Subject: Re: [cfe-dev] Clangs equivalent to GCCs -Og flag?<br>
From: <a href="mailto:dblaikie@gmail.com" target="_blank">dblaikie@gmail.com</a><br>
To: <a href="mailto:dan@walms.co.uk" target="_blank">dan@walms.co.uk</a><br>
CC: <a href="mailto:cfe-dev@cs.uiuc.edu" target="_blank">cfe-dev@cs.uiuc.edu</a><o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><o:p> </o:p></p>
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On Jul 29, 2015 3:23 AM, "Dan Walmsley" <<a href="mailto:dan@walms.co.uk" target="_blank">dan@walms.co.uk</a>> wrote:<br>
><br>
> GCC has a debug level flag of -Og which enables all optimizers that won't degrade the debugging experience greatly.<br>
><br>
> Does clang have an equivalent?<o:p></o:p></p>
<p>No, clang had no equivalent at this time.<o:p></o:p></p>
<p>><br>
> Thanks in advance.<br>
><br>
> Dan<br>
><br>
> _______________________________________________<br>
> cfe-dev mailing list<br>
> <a href="mailto:cfe-dev@cs.uiuc.edu" target="_blank">cfe-dev@cs.uiuc.edu</a><br>
> <a href="http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev" target="_blank">http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev</a><br>
><o:p></o:p></p>
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