The Passmanager passes need very little or zero x86 knowledge to do
their work. They don't need the x86 OpDispatcher handling code at all.
Convert this entirely over to using the IREmitter class so it can
actually optimize IR code from the IRLoader frontend
This application loads an IR from an IR file.
It then proceeds to lex the file and translate it to binary IR.
Once the file is loaded it then the IR is passed off to the backend and
it attempts to run the IR.
This will be used when debugging RA and writing unit tests directly in
IR.
This is a necessary evil for ensuring correctness
Scott Mansell