SSA-Based Register Allocation with PBQP

  title={SSA-Based Register Allocation with PBQP},
  author={Sebastian Buchwald and Andreas Zwinkau and Thomas Bersch},
Recent research shows that maintaining SSA form allows to split register allocation into separate phases: spilling, register assignment and copy coalescing. After spilling, register assignment can be done in polynomial time, but copy coalescing is NP-complete. In this paper we present an assignment approach with integrated copy coalescing, which maps the problem to the Partitioned Boolean Quadratic Problem (PBQP). Compared to the state-of-the-art recoloring approach, this reduces the relative… CONTINUE READING
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