For example, say the converted signed type is s64, shifting left by 63
bits would be undefined behavior.
However, given an ASL is essentially the same behavior as an LSL
we can just use an unsigned type instead of converting to a signed type.
Negation of values such as -9223372036854775808 can't be represented in
signed equivalents (such as long long), leading to signed overflow.
Therefore, we can just invert bits and add 1 to perform this behavior
with unsigned arithmetic.
