[llvm-dev] Enabling EarlyCSE w/ MemorySSA by default

[Mikhail Zolotukhin via llvm-dev]

Our bots detected the following compile-time slowdowns between r306475 and r306478 (I'd suspect that r306477 is causing it).

O3/LTO:
CTMark/lencod/lencod		2.3%
CTMark/tramp3d-v4/tramp3d-v4	2.1%
CTMark/SPASS/SPASS		1.8%
CTMark/sqlite3/sqlite3		1.6%
CTMark/ClamAV/clamscan		1.3%
CTMark/mafft/pairlocalalign	0.9%
CTMark/kimwitu++/kc		0.9%
CTMark/Bullet/bullet		0.9%
CTMark/7zip/7zip-benchmark	0.8%

Os:
CTMark/SPASS/SPASS		1.2%
CTMark/tramp3d-v4/tramp3d-v4	1.1%
CTMark/sqlite3/sqlite3		0.9%

Thanks,
Michael

> On Jun 28, 2017, at 2:40 PM, Gerolf Hoflehner via llvm-dev <llvm-dev at lists.llvm.org> wrote:
> 
> Can you share you compile-time and memory footprint  measurements at least for CTMark? For a new pass/feature it would be great to share this with the community before you commit. Or did I miss them?
> 
> 
> Thanks
> Gerolf
> 
> 
>> On Jun 27, 2017, at 3:26 PM, Geoff Berry via llvm-dev <llvm-dev at lists.llvm.org> wrote:
>> 
>> EarlyCSE w/ MemorySSA has been enabled by default as of r306477
>> 
>> 
>> On 6/19/2017 2:42 PM, Geoff Berry via llvm-dev wrote:
>>> Sounds good to me.
>>> 
>>> 
>>> On 6/19/2017 2:27 PM, Davide Italiano via llvm-dev wrote:
>>>> On Mon, Jun 19, 2017 at 11:22 AM, Nemanja Ivanovic via llvm-dev
>>>> <llvm-dev at lists.llvm.org> wrote:
>>>>> For what it's worth, I just ran this on PowerPC and a double bootstrap with
>>>>> lit and lnt tests passes everything.
>>>>> 
>>>> I fixed the only bug that has been reported (there were others, but
>>>> turned out to be issues in other passes).
>>>> Zhendong, did you find anything else? If not, maybe let's wait another
>>>> week to give people another chance to test and then decide whether
>>>> to flip the switch.
>>>> 
>>>> -- 
>>>> Davide
>>>> _______________________________________________
>>>> LLVM Developers mailing list
>>>> llvm-dev at lists.llvm.org
>>>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>> 
>> 
>> -- 
>> Geoff Berry
>> Employee of Qualcomm Datacenter Technologies, Inc.
>> Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.  Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.
>> 
>> _______________________________________________
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>> llvm-dev at lists.llvm.org
>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
> 
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