On Tue, May 3, 2016 at 6:52 PM, Bernd Schmidt <bschm...@redhat.com> wrote: > On 05/03/2016 11:26 PM, David Edelsohn wrote: >> >> Optimizations enabled by default at -O2 should show an overall net >> benefit -- that is the general justification that we have used in the >> past. I request that this change be reverted until more compelling >> evidence of benefit is presented. > > Shrug. Done. I was going to look at adding some more smarts to it to clean > up after the register allocator; I guess I shan't bother.
Why not add the smarts and then x86, POWER, ARM and other architectures can test the performance benefit? If that change makes the benefit more consistent, the motivation for making the option the default at -O2 will be clearer. Thanks, David
