Splits this pass in to three parts.
First function is to remove StoreContext-LoadContext pairs that are
redundant. Removes the Load that has occured after a store-load pair.
Second function is to remove LoadContext instructions that are redundant
due to no other stores to that location
Third function is to remove StoreContext instructions that are redundant
due to no load happening between them (Relies on previous functions)
I had to change how blocks are represented to make it easier to parse
This required a fairly substantial refactor that makes it so blocks are
represented differently and we can walk them sequentially.
This will make future analysis easier to deal with.
Had to rewrite the passes and core's parsing of the IR afterwards.
Moved RA in to a optimization pass to be shared between the JIT backends
This works because x86-64 and AArch64 RA can be identical.
Still doesn't support PHI nodes or spilling correctly, this is the first
step in the process of getting there.
Ryan Houdek