https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79964
--- Comment #3 from wilco at gcc dot gnu.org --- (In reply to PeteVine from comment #2) > I can confirm the first part of the issue gets fixed with this patch: > > https://gcc.gnu.org/ml/gcc-patches/2017-04/msg01415.html There are a few more division patches on the way, eg. https://gcc.gnu.org/ml/gcc-patches/2017-04/msg01312.html is one of them, another should remove the redundant shift. > but there's a regression in gcc8 concerning the second part. (or rather the > workarounds don't work any more) > > http://openbenchmarking.org/result/1704298-RI-CRAYREGRE13 > > ("basic flags" didn't deactivate -mfix-cortex-a53-843419, hence the > difference) I'm not sure what you're trying to measure here - it's very confusing with multiple overlapping options (O3/Ofast/tree-vectorize), -mcpu/-march. Is it related to -fipa-pta or is that not relevant?
