[LLVMdev] Graph coloring register allocation

[Евгений Балашов]

	Hello,
	I am working on developing register allocator for irregular
architectures (with register
	pair, and banks) and plan to base my work on graph coloring register
allocator. 
	I wonder if LLVM already has basic graph coloring register
allocator, or somebody is
	working on it?

	Also, I'm not sure what is the best way to even describe the
register constraints in
	tablegen:
	- How can I describe register pairs?
	- It it possible to have overlapping register classes?

	Thanks,
	Eugeny