On Fri, Apr 29, 2016 at 9:32 AM, Bernd Schmidt <bschm...@redhat.com> wrote: > On 04/29/2016 03:02 PM, David Edelsohn wrote: >> >> How has this show general benefit for all architectures to deserve >> enabling it by default at -O2? > > > It should improve postreload scheduling in general, and it can also help > clear up bad code generation left behind by register allocation.
Did you test the actual performance benefit on any architectures, especially architectures other than x86? Thanks, David