https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109546
--- Comment #3 from Andrew Macleod <amacleod at redhat dot com> ---
Patch in testing.
when deciding to fold condition of builtin_unreachable, VRP is failing to
recognize that given
if (ptr == &x)
__builtin_unreachable ()
&x is not a representable range, and thus should not be eliminated early even
though it satisfies the other criteria.
it just sees it as a symbolic value == CONSTANT and thinks its smart enough
when it isn't.
