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d87337
2020 Sep 09
2
[RFC] New Feature Proposal: De-Optimizing Cold Functions using PGO Info
On Wed, 9 Sep 2020 at 19:26, Nemanja Ivanovic <nemanja.i.ibm at gmail.com>
wrote:
> - Default (i.e. no -profile-deopt-cold): do nothing
> - Option with no arg (i.e. -profile-deopt-cold): add attribute only to
> functions that have an execution count of zero
> - Option with an arg (i.e. -profile-deopt-cold=<N>): add attribute to
> functions that account for <N>% of
2020 Sep 09
5
[RFC] New Feature Proposal: De-Optimizing Cold Functions using PGO Info
...lty.
We believed that the above numbers had justified this patch to be useful on
improving build time with little overhead.
Here are the patches for review:
* Modifications on LLVM instrumentation-based PGO:
https://reviews.llvm.org/D87337
* Modifications on Clang driver: https://reviews.llvm.org/D87338
Credit: This project was originally started by Paul Robinson <
paul.robinson at sony.com> and Edward Dawson <Edd.Dawson at sony.com> from Sony
PlayStation compiler team. I picked it up when I was interning there this
summer.
Thank you for your reading.
-Min
--
Min-Yih Hsu
Ph.D Studen...