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IntegratedCodeGen

v23	v24
95	95	Note that the graph still contains:
96	96	* '''Variables''' (ie local register that are not yet mapped to particular machine registers)
97		* '''Stack-slot addressing modes''', which include late-bound compile-time constants, such as the offset in the frame of the a variable spill location, or BlockId stack-top-on-entry.
	97	* '''Stack-slot addressing modes''', which include late-bound compile-time constants, such as the offset in the frame of the a variable spill location, or !BlockId stack-top-on-entry.
98	98
99	99	The invariant is that each node could be done by one machine instruction, provided each `LocalReg` maps to a (suitable) physical register; and an instruction involving a stack-slot can cope with (Sp+n).