[Bug rtl-optimization/114902] [14/15 Regression] wrong code at -O3 with "-fno-tree-vrp -fno-expensive-optimizations -fno-tree-dominator-opts" on x86_64-linux-gnu

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114902

--- Comment #9 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #2)
> We go from CCGC with a sign_extend to a zero_extend with CCZ. that can't be
> right.

Why not?  We prefer zero_extend whenever it has the same result.