[Bug tree-optimization/66178] Another label as values ICE

[SztfG at yandex dot ru]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66178

--- Comment #1 from SztfG at yandex dot ru ---
better test case

int test(void)
{
    static int a =  ((char *)&&l2-(char *)&&l3)+((char *)&&l1-(char *)&&l2);
l1:
l2:
l3:
    return a;
}