[Bug tree-optimization/104639] [12 Regression] Useless loop not fully optimized anymore

[denis.campredon at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104639

--- Comment #5 from denis.campredon at gmail dot com ---
That peace of code seems related but does not need a loop unlike the original
one. 

------------------
int foo(unsigned i) {
    return i ? i % 2 : 0;
}
------------------

With trunk 12
------------------------
foo(unsigned int):
        mov     eax, edi
        xor     edx, edx
        and     eax, 1
        test    edi, edi
        cmove   eax, edx
        ret
-----------------------

With 11.2
-----------------------
foo(unsigned int):
        mov     eax, edi
        and     eax, 1
        ret
-----------------------