-- a spill stage
| RegAllocStatsSpill
{ raGraph :: Color.Graph Reg RegClass Reg -- ^ the partially colored graph
, raCoalesced :: UniqFM Reg -- ^ the regs that were coaleced
, raSpillStats :: SpillStats -- ^ spiller stats
-- a spill stage
| RegAllocStatsSpill
{ raGraph :: Color.Graph Reg RegClass Reg -- ^ the partially colored graph
, raCoalesced :: UniqFM Reg -- ^ the regs that were coaleced
, raSpillStats :: SpillStats -- ^ spiller stats