[DFAJumpThreading] Enable DFAJumpThreading by default #157642
Conversation
Co-Authored-By: YinZd <104915588+nothiny@users.noreply.github.com> Co-Authored-By: ict-ql <168183727+ict-ql@users.noreply.github.com> Co-Authored-By: Lin Wang <wanglulin@ict.ac.cn>
|
Thank you for submitting a Pull Request (PR) to the LLVM Project! This PR will be automatically labeled and the relevant teams will be notified. If you wish to, you can add reviewers by using the "Reviewers" section on this page. If this is not working for you, it is probably because you do not have write permissions for the repository. In which case you can instead tag reviewers by name in a comment by using If you have received no comments on your PR for a week, you can request a review by "ping"ing the PR by adding a comment “Ping”. The common courtesy "ping" rate is once a week. Please remember that you are asking for valuable time from other developers. If you have further questions, they may be answered by the LLVM GitHub User Guide. You can also ask questions in a comment on this PR, on the LLVM Discord or on the forums. |
We recommend setting
dfa-jump-threadto be enabled by default. It’s a mature optimization that’s been supported since GCC 9.1.0. At the-O2opt level, both the GCC and ICX compilers have this optimization enabled by default.Once it’s enabled, we saw a 13% performance improvement in the CoreMark benchmark on the X86 platform (Intel i9-11900K Rocket Lake), and even a 15% increase on the KunMingHu FPGA. Additionally, we verified the correctness of this pass using SPEC 2017.