On Thu, Nov 24, 2016 at 03:26:45PM +0100, Bernd Schmidt wrote: > On 11/24/2016 03:21 PM, Segher Boessenkool wrote: > > >Combine uses insn_rtx_cost extensively. I have tried to change it to use > >the full rtx cost, not just the source cost, a few times before, and it > >always only regressed. Part of it is that most ports' cost calculations > >are, erm, not so great -- every target we care about needs fixes. > > > >Let's please not try this in stage 3. > > It got approved and committed. Do you want me to revert it now or wait > for obvious signs of fallout?
In my opinion it is an early stage 1 thing, not something suitable for stage 3. I can do some simple tests on various targets if you want. Segher
