Generate more compact code for bit tests using the TEST instruction:
i1 = int_and(i0, 7); i2 = int_is_zero(i1); guard_true(i2)
=>
i2 = int_test_is_zero(i0, 7); guard_true(i2)
The more compact version doesn't need to allocate a register, copy a value there, AND a constant, and then CMP the result with zero. Instead a single TEST instruction suffices.