https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114532
Sam James <sjames at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |kristerw at gcc dot gnu.org See Also| |https://gcc.gnu.org/bugzill | |a/show_bug.cgi?id=85678 --- Comment #3 from Sam James <sjames at gcc dot gnu.org> --- As David said at https://inbox.sourceware.org/gcc/d92b8262-5835-a7b1-363d-709724a8d...@hesbynett.no/, I'd expect it to improve performance in that we're no longer pessimising by forcing them to be common, but AFAIK there's no specific optimisation otherwise. http://kristerw.blogspot.com/2016/11/tentative-variable-definitions-and-fno.html is a nice writeup about it.