[Bug middle-end/110556] Floating point exception with specific optimizations

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110556

--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to CTC from comment #6)
> (In reply to Andrew Pinski from comment #4)
> > Reducing this but it is taking a little longer as I get to the case where we
> > get undefined code on accident so I need to test it using
> > -fsanitize=undefined,address also.
> 
> For the unreduced program and optimizations, I test it with
> -fno-strict-aliasing -fwrapv -fno-aggressive-loop-optimizations and
> -fsanitize=undefined. Both of them got floating point exception too.
> 
> I reduced the program with -fsanitize=undefined. The result doesn't get
> floating point exception. But its return value is not 0.

That is still undefined code ... as the return value of the app is not
specified in the source.