[Bug tree-optimization/111276] rewrite_to_defined_overflow rewrites already defined code

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111276

--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #7) 
> This is why I didn't see it before even. I wonder if the
> compute_invariantness change should take into account conditional
> expressions ...

I have a fix, will submit all 4 patches in the series here after my test
finishes.