[llvm] r194459 - Change data structure to memorize computed result in ScalarEvolution

[Chandler Carruth]

On Tue, Nov 12, 2013 at 2:52 AM, Wan, Xiaofei <xiaofei.wan at intel.com> wrote:

>  Sorry, we discussed it privately to get quick response, see emails
> attached.
>

Sure.

Andy, in the future if code review is taking place over email, please keep
it on the list. It is much healthier for the community and avoids confusion
like this.

Wan Xiaofei, when stuff is discussed in person or for whatever reason
accidentally ends up off-list, it is useful to add at least a note to the
commit log or to the original review thread for other members of the
community just so we can have a heads up or summary of the discussion.


>
>
> Thanks
>
> Wan Xiaofei
>
> *From:* Chandler Carruth [mailto:chandlerc at google.com]
> *Sent:* Tuesday, November 12, 2013 5:56 PM
> *To:* Wan, Xiaofei
> *Cc:* Commit Messages and Patches for LLVM
> *Subject:* Re: [llvm] r194459 - Change data structure to memorize
> computed result in ScalarEvolution
>
>
>
>
>
> On Tue, Nov 12, 2013 at 1:40 AM, Wan Xiaofei <xiaofei.wan at intel.com>
> wrote:
>
> Author: xiaofei.wan
> Date: Tue Nov 12 03:40:41 2013
> New Revision: 194459
>
> URL: http://llvm.org/viewvc/llvm-project?rev=194459&view=rev
> Log:
> Change data structure to memorize computed result in ScalarEvolution
>
> Replace std::map with SmallVector to memorize the cached result since SCEVusually belongs to little Loop/BB
> Linear scan on SmallVector is faster than std::map.
>
> Code reviewer : Andrew Trick.
>
>
> Please revert this.
>
>
>
> Andy never reviewed this on the mailing list. Hal gave one comment, which
> you replied to, and no updates to the code review thread have occurred.
> There was no code review or LGTM. =/ I really like the idea of this patch,
> but you can't just bypass the code review process like this!
>
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