def y_spec(c: Contract) -> None:
ss = c.alloc(alias_ty('struct.s'))
z = c.fresh_var(i1, 'z')
c.execute_func(ss, z)
c.points_to_bitfield(ss, 'y', z)
c.returns(void)
def oneptr_update_func(c: Contract, ty: LLVMType, fn_name: str) -> None:
"""Updates contract ``c`` to declare calling it with a pointer of type ``ty``
updates that pointer with the result, which is equal to calling the
Cryptol function ``fn_name``."""
(x, x_p) = ptr_to_fresh(c, ty)
c.execute_func(x_p)
c.points_to(x_p, cry(fn_name)(x))
c.returns(void)
return None
