https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107413
--- Comment #9 from Rama Malladi <rvmallad at amazon dot com> --- (In reply to Rama Malladi from comment #8) > (In reply to Wilco from comment #7) > > The revert results in about 0.5% loss on Neoverse N1, so it looks like the > > reassociation pass is still splitting FMAs into separate MUL and ADD (which > > is bad for narrow cores). > > Thank you for checking on N1. Did you happen to check on V1 too to reproduce > the perf results I had? Any other experiments/ tests I can do to help on > this filing? Thanks again for the debug/ fix. I ran SPEC cpu2017 fprate 1-copy benchmark built with the patch reverted and using option 'neoverse-n1' on the Graviton 3 processor (which has support for SVE). The performance was up by 0.4%, primary contributor being 519.lbm_r which was up 13%.
