Zhang, Annita via llvm-dev
2019-Dec-04 13:39 UTC
[llvm-dev] Discuss about the LLVM SW mitigation to Jump Conditional Code Erratum
I will reply those comments tomorrow. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20191204/f1111299/attachment.html>
Craig Topper via llvm-dev
2019-Dec-04 16:40 UTC
[llvm-dev] Discuss about the LLVM SW mitigation to Jump Conditional Code Erratum
Annita, do you have measurements with inserting NOPs instead of redundant segment prefixes. The code review was asking for performance data to show that prefixes are better than NOPs. ~Craig On Wed, Dec 4, 2019 at 5:40 AM Zhang, Annita via llvm-dev < llvm-dev at lists.llvm.org> wrote:> I will reply those comments tomorrow. > _______________________________________________ > LLVM Developers mailing list > llvm-dev at lists.llvm.org > https://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/20191204/2f219789/attachment.html>
Fāng-ruì Sòng via llvm-dev
2019-Dec-06 08:21 UTC
[llvm-dev] Discuss about the LLVM SW mitigation to Jump Conditional Code Erratum
On Wed, Dec 4, 2019 at 8:41 AM Craig Topper via llvm-dev <llvm-dev at lists.llvm.org> wrote:> > Annita, do you have measurements with inserting NOPs instead of redundant segment prefixes. The code review was asking for performance data to show that prefixes are better than NOPs. > > ~CraigAlso -ffunction-sections. With more sections, it may be easier to exhibit non-convergence problems. The compile time may not be slowed much because functions will be smaller. The code size may increase if more sections need over-alignment.