[llvm-dev] Using PGO and -O3
Eric Christopher via llvm-dev
llvm-dev at lists.llvm.org
Wed Jan 31 11:54:45 PST 2018
echristo at jhereg ~/s/l/t/clang> git svn dcommit
Committing to https://llvm.org/svn/llvm-project/cfe/trunk ...
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).
> 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
>> 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
> Best Regards,
> Victor Leschuk | Software Engineer | Access Softek
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
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