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Author SHA1 Message Date
Lang Hames 7b1e683975 Added copy sensible construction & assignment to PBQP graphs and fixed a memory access bug in the heuristic solver. 
llvm-svn: 95633
 2010-02-09 00:45:48 +00:00
Lang Hames 090c7e82dd New PBQP solver. 
* Fixed a reduction bug which occasionally led to infinite-cost (invalid)
  register allocation solutions despite the existence finite-cost solutions.
* Significantly reduced memory usage (>50% reduction).
* Simplified a lot of the solver code.

llvm-svn: 94514
 2010-01-26 04:49:58 +00:00