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Question - 2 What are the major steps of a Chaitin-Briggs (global, bottom-up) register allocator?repeated if instructions are spilled?range that includes all program point from that definition up to the last use of that definition. register allocator? of the definitions of some variable (or virtual register) and a subset of the uses of that virtual register, such that any definition of that variable that reaches a use in the live range's "use set" will be included in that live range's "definition set" and "use set" will include every use that can be reached from a definition in that live range's "use set". Each definition of a variable and each use of a variable may appear only ...Read More in a single live range. independently "colored" with a register. What problem would arise if a definition can reach a use that belongs to a different live range? a way of renaming variables (or virtual registers), similar to the way SSA renames variables. If one replaces each definition/use of a variable (or virtual register) with the live range to which it belongs, one can then compute for each program location, which live ranges are live, by using the LIVEOUT dataflow analysis to get global information and then examining each block starting at the bottom of the block using the LIVEOUT information. How is this process modified to determine whether two live ranges interfere? ...Read Less

Solution Preview - otation Used: - GI: Interference Graph, where GI = (NI, EI) R: Number of Registers (R colours) N: Node or Vertex in the Graph GI While there exists vertices with < R neighbours in GI 1.1 Pick any vertex N (degree) N < R and push it onto the stack 1.2 Remove that vertex and all the associated edges with it from GI If GI is non-e

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