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<p>Maybe we should update the documentation to state this directly?
Currently its a little bit confusing.<br>
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<div class="moz-cite-prefix">On 01/29/2018 05:51 AM, Xinliang David
Li wrote:<br>
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<blockquote type="cite"
cite="mid:CALRgJCOsgWcLmFw9zdJUXKThHf9=J1oJAo=zO-8=5_x3Rdx2Hw@mail.gmail.com">
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<div dir="ltr">It means using PGO with -O2 and above (including
-O3).
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<div>David</div>
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<div class="gmail_extra"><br>
<div class="gmail_quote">On Sun, Jan 28, 2018 at 6:48 PM, Victor
Leschuk via llvm-dev <span dir="ltr"><<a
href="mailto:llvm-dev@lists.llvm.org" target="_blank"
moz-do-not-send="true">llvm-dev@lists.llvm.org</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Hello all,<br>
<br>
clang-related PGO documentation recommends using PGO with
-O2 (for<br>
example:<br>
<a
href="https://clang.llvm.org/docs/UsersManual.html#profile-guided-optimization"
rel="noreferrer" target="_blank" moz-do-not-send="true">https://clang.llvm.org/docs/<wbr>UsersManual.html#profile-<wbr>guided-optimization</a>).<br>
The question is: is there any reason why exactly -O2 is used
in<br>
examples? Are there any factors which can cause problems
when using PGO<br>
with -O3?<br>
<br>
Thanks in advance for your advice!<br>
<span class="HOEnZb"><font color="#888888"><br>
--<br>
Best Regards,<br>
<br>
Victor Leschuk | Software Engineer | Access Softek<br>
<br>
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<pre class="moz-signature" cols="72">--
Best Regards,
Victor Leschuk | Software Engineer | Access Softek</pre>
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