[cfe-dev] Clangs equivalent to GCCs -Og flag?

[Robinson, Paul]

People ask about this from time to time, but we've never done anything about it.
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.
--paulr

From: cfe-dev-bounces at cs.uiuc.edu [mailto:cfe-dev-bounces at cs.uiuc.edu] On Behalf Of David Blaikie
Sent: Wednesday, July 29, 2015 10:13 AM
To: Dan Walmsley; cfe-dev Developers
Subject: Re: [cfe-dev] Clangs equivalent to GCCs -Og flag?



On Wed, Jul 29, 2015 at 8:42 AM, Dan Walmsley <dan at walms.co.uk<mailto:dan at walms.co.uk>> wrote:
Thanks,

    Perhaps there might be some documentation somewhere that would give me an idea of which optimizations to enable individually?

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.

- Dave


Dan
________________________________
Date: Wed, 29 Jul 2015 06:40:06 -0700
Subject: Re: [cfe-dev] Clangs equivalent to GCCs -Og flag?
From: dblaikie at gmail.com<mailto:dblaikie at gmail.com>
To: dan at walms.co.uk<mailto:dan at walms.co.uk>
CC: cfe-dev at cs.uiuc.edu<mailto:cfe-dev at cs.uiuc.edu>


On Jul 29, 2015 3:23 AM, "Dan Walmsley" <dan at walms.co.uk<mailto:dan at walms.co.uk>> wrote:
>
> GCC has a debug level flag of -Og which enables all optimizers that won't degrade the debugging experience greatly.
>
> Does clang have an equivalent?

No, clang had no equivalent at this time.

>
> Thanks in advance.
>
> Dan
>
> _______________________________________________
> cfe-dev mailing list
> cfe-dev at cs.uiuc.edu<mailto:cfe-dev at cs.uiuc.edu>
> http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/cfe-dev/attachments/20150731/40a27355/attachment.html>