On Thu, Feb 06, 2020 at 11:01:56AM +0000, Dave Love wrote: > Jakub Jelinek <jakub@xxxxxxxxxx> writes: > > > On Wed, Feb 05, 2020 at 05:13:27PM +0000, Dave Love wrote: > >> GCC doesn't document the targets for which -fno-common produces better > >> code. Can someone say for which of the Fedora ones it makes a > >> difference? > > > > E.g. on any that is capable of vectorization. > > Thanks. I'll pass that on to the maintainer of the (x86_64-specific) > performance library, though I guess he'll fix it anyhow. Note, if for whatever reason one wants the common behavior e.g. on a few selected variables, one can add __attribute__((__common__)) to those variables to override the default, it doesn't have to be just -fcommon that changes the behavior of all non-automatic variables without initializers. Jakub _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx
