[Bug ipa/111088] useless 'xor eax,eax' inserted when a value is not returned and icf

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111088

Martin Jambor  changed:

   What|Removed |Added

 CC||jamborm at gcc dot gnu.org

--- Comment #5 from Martin Jambor  ---
(In reply to Jan Hubicka from comment #3)
> > But adds a return with a value. And then the inliner inlines foo into foo2 
> > but
> > we still have the return with a value around ...
> I guess ICF can special case unused return value, but why this is not
> taken care of by ipa-sra?

Probably because none of the functions is static.

[Bug ipa/111088] useless 'xor eax,eax' inserted when a value is not returned and icf

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111088

--- Comment #4 from Richard Biener  ---
In C++ this would have been undefined - I don't think this particular testcase
is worth "optimizing".

[Bug ipa/111088] useless 'xor eax,eax' inserted when a value is not returned and icf

[hubicka at ucw dot cz via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111088

--- Comment #3 from Jan Hubicka  ---
> But adds a return with a value. And then the inliner inlines foo into foo2 but
> we still have the return with a value around ...
I guess ICF can special case unused return value, but why this is not
taken care of by ipa-sra?