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.
As an aside, this change seems to be the source of a new code generation bug affecting the PPC kernel.
Please file a PR. Bernd
