Improve how IR is created #19
Description
While the caching is nice for decreasing the amount of waste, it might be desirable to be able to get rid of the cached data.
Maybe make the cache local to the compiler object? We could also maybe make it cache pointers to make more nodes cacheable.
Line numbers could pose a problem for caching.
Maybe make it unmanaged? Shouldn't be too hard. Could then more easily restrict their lifetime to the compiler or environment.