[llvm-dev] Using PGO and -O3

[Eric Christopher via llvm-dev]

Sure:

echristo at jhereg ~/s/l/t/clang> git svn dcommit
Committing to https://llvm.org/svn/llvm-project/cfe/trunk ...
M docs/UsersManual.rst
Committed r323902

-eric

On Wed, Jan 31, 2018 at 12:16 AM Victor Leschuk via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Maybe we should update the documentation to state this directly? Currently
> its a little bit confusing.
>
> On 01/29/2018 05:51 AM, Xinliang David Li wrote:
>
> It means using PGO with -O2 and above (including -O3).
>
> David
>
> On Sun, Jan 28, 2018 at 6:48 PM, Victor Leschuk via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
>
>> Hello all,
>>
>> clang-related PGO documentation recommends using PGO with -O2 (for
>> example:
>> https://clang.llvm.org/docs/UsersManual.html#profile-guided-optimization
>> ).
>> The question is: is there any reason why exactly -O2 is used in
>> examples? Are there any factors which can cause problems when using PGO
>> with -O3?
>>
>> Thanks in advance for your advice!
>>
>> --
>> Best Regards,
>>
>> Victor Leschuk | Software Engineer | Access Softek
>>
>> _______________________________________________
>> LLVM Developers mailing list
>> llvm-dev at lists.llvm.org
>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>
>
>
> --
> Best Regards,
>
> Victor Leschuk | Software Engineer | Access Softek
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20180131/b916b81c/attachment.html>