ghc-7.2.1: The GHC API

CmmLive

Synopsis

Documentation

type CmmLive = RegSet

The variables live on entry to a block

cmmLiveness :: CmmGraph -> FuelUniqSM BlockEntryLiveness

Calculated liveness info for a CmmGraph

liveLattice :: DataflowLattice CmmLive

The dataflow lattice

noLiveOnEntry :: BlockId -> CmmLive -> a -> a

On entry to the procedure, there had better not be any LocalReg's live-in.

xferLive :: BwdTransfer CmmNode CmmLive

The transfer function EZY: Bits of this analysis are duplicated in CmmSpillReload, though it's not really easy to efficiently reuse all of this. Keep in mind if you need to update this analysis.

gen :: UserOfLocalRegs a => a -> RegSet -> RegSet

The transfer equations use the traditional gen and kill notations, which should be familiar from the Dragon Book.