def f(n):
if NonConstant(False):
dtype = float64_dtype
else:
dtype = int32_dtype
ar = W_NDimArray(n, [n], dtype=dtype)
i = 0
while i < n:
ar.get_concrete().setitem(i, int32_dtype.box(7))
i += 1
v = ar.descr_add(space, ar).descr_sum(space)
assert isinstance(v, IntObject)
return v.intval
