AUSAM/source/c_compiler/still_to_do

1) register unions of <= 2 bytes should be possible.

2) optimize
	movb	x,r0
	bic	$!377,r0
   to
	clr	r0
	bisb	x,r0

3) type transfer operators

4) typeof operator for above

5) complex arithmetic

6) compiler options to:
	a) restrict the number of registers with which code
		is generated.
	b) generate offsets relative to the sp rather than
		r5
	c) these would allow doing away with some calls on
		csave/cret at the cost of
		i) no dynamic allocation on the stack
		ii) forced stack clean-up on call to cret
		iii) probably push/pop of all arguments

7) compiler should figure out the static amount of stack used
	by each procedure and make this number available

8) dynamic arrays

9) better code for some bit field operations like compare
	Also generally no need for bit extract to take
	two registers.