[Bug ipa/65502] pure-const should play well with clobbers.

[hubicka at ucw dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65502

--- Comment #7 from Jan Hubicka <hubicka at ucw dot cz> ---
> Can the bug be marked as resolved?
I think to fully resolve we still want to teach DCE to replace
pure/const destructor by clobber when removing it.  This should
not be too hard to do because destructors are marked. Or do we output
clobber after every destructor call as part of lifetime-DSE?

Honza