[llvm-dev] Loop Distribution pass

Renato Golin via llvm-dev llvm-dev at lists.llvm.org
Thu Sep 20 14:15:14 PDT 2018


On Thu, 20 Sep 2018 at 09:11, Jonas Paulsson
<paulsson at linux.vnet.ibm.com> wrote:
> The question now is if this is a wise idea? Do you think things will
> change significantly with the Loop Distribution pass in the direction
> that it gets much more enabled, which may then cause regressions on
> SystemZ? If that is the case, perhaps the idea now is that nobody
> activates it per default until some initial reasonable cost modeling has
> been made?

Having a buildbot publishing benchmark results to LNT would go a long
way of helping you track regressions, but if the cost model is not
there yet, you may find yourself going round in circles...

-- 
cheers,
--renato


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