[Bug target/85595] __atomic_is_lock_free(sizeof(unsigned long long), &v) returns true on i686

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85595

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Alexander Ivchenko from comment #0)
> (long long is only 4-byte aligned on i686)

Not when it's placed on the stack. GCC will always align the variable in your
example to 8 bytes. But a better example shows that __atomic_is_lock_free does
still return true for objects aligned to 4 bytes.