[Bug ipa/63569] [5.0 Regression] Wrong code with volatile and ICF

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63569

--- Comment #5 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #4)

> There's suggested patch on mailing list:
> https://gcc.gnu.org/ml/gcc-patches/2014-10/msg01723.html. Reason why it
> hasn't been applied is that Richard prefers kind of refactoring for IPA ICF
> that will cover this case in purer way.


Sorry, I just didn't notice the URL in the headers.
Your patch fixes the issue for me.
Is there any way to make progress on this issue? 
Could you address Richi's concerns?