[Bug ipa/127752] [Regression] volatile member read of a never-written global dropped with -O2 -flto

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127752

Drea Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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          Component|middle-end                  |ipa

--- Comment #1 from Drea Pinski <pinskia at gcc dot gnu.org> ---
-fwhole-program might also run into this or even a static var.

I suspect ipa pass which makes a const var needs to walk the fields to check
for volatileness.