Don't need this any more
Get vector arguments working properly.
- Support pushing vector arguments above 5 on stack
- Fix a bug where vector register arguments were not treated properly
Add a test that demonstrates vector arguments both in registers and stored on the stack.
- Fix so stack is properly reserved for arguments.  Needed to replace pseudo instruction with a real one to decrement stack (It's not clear to me why LLVM does it this way)
- LowerFormalArguments was not handling vectors of floats
Specify callee saved registers, including link register.