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register allocation

register allocation in Technology
compiler, algorithm
The phase of a compiler that determines which values will be placed in registers. Register allocation may be combined with register assignment.
This problem can be shown to be isomorphic to graph colouring by relating values to nodes in the graph and registers to colours. Values (nodes) which must be valid simultaneously are linked by edges and cannot be stored in the same register (coloured the same).
See also register dancing and register spilling.
[Preston Briggs, PhD thesis, Rice University, April 1992 "Register Allocation via Graph Coloring" (ftp://ftp.cs.rice.edu/public/preston/thesis.ps.gz)].
(2000-12-04)
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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