Register Allocation via Graph Colouring

Add node (n) Add precoloured nodes (p) Add interference edge (i) Add move-related edge (m) Exit edit mode (x)

Delete selected node/edge (d)

Simplify node (s) Coalesce Briggs (b) Coalesce George (g) Freeze (f) Candidate spill (c) Assign pre-colours (a) Select (l)

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