ghc-7.8.2: The GHC API

Safe Haskell | None
Language | Haskell98

CmmLive

Synopsis

- type CmmLocalLive = CmmLive LocalReg
- type CmmGlobalLive = CmmLive GlobalReg
- cmmLocalLiveness :: DynFlags -> CmmGraph -> BlockEntryLiveness LocalReg
- cmmGlobalLiveness :: DynFlags -> CmmGraph -> BlockEntryLiveness GlobalReg
- liveLattice :: Ord r => DataflowLattice (CmmLive r)
- noLiveOnEntry :: BlockId -> CmmLive LocalReg -> a -> a
- xferLive :: forall r. (UserOfRegs r (CmmNode O O), DefinerOfRegs r (CmmNode O O), UserOfRegs r (CmmNode O C), DefinerOfRegs r (CmmNode O C)) => DynFlags -> BwdTransfer CmmNode (CmmLive r)
- gen :: UserOfRegs r a => DynFlags -> a -> RegSet r -> RegSet r
- kill :: DefinerOfRegs r a => DynFlags -> a -> RegSet r -> RegSet r
- gen_kill :: (DefinerOfRegs r a, UserOfRegs r a) => DynFlags -> a -> CmmLive r -> CmmLive r
- removeDeadAssignments :: DynFlags -> CmmGraph -> UniqSM (CmmGraph, BlockEnv CmmLocalLive)

# Documentation

type CmmLocalLive = CmmLive LocalReg

type CmmGlobalLive = CmmLive GlobalReg

cmmLocalLiveness :: DynFlags -> CmmGraph -> BlockEntryLiveness LocalReg

Calculated liveness info for a CmmGraph

cmmGlobalLiveness :: DynFlags -> CmmGraph -> BlockEntryLiveness GlobalReg

liveLattice :: Ord r => DataflowLattice (CmmLive r)

The dataflow lattice

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

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

xferLive :: forall r. (UserOfRegs r (CmmNode O O), DefinerOfRegs r (CmmNode O O), UserOfRegs r (CmmNode O C), DefinerOfRegs r (CmmNode O C)) => DynFlags -> BwdTransfer CmmNode (CmmLive r)

The transfer function

gen :: UserOfRegs r a => DynFlags -> a -> RegSet r -> RegSet r

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

kill :: DefinerOfRegs r a => DynFlags -> a -> RegSet r -> RegSet r

gen_kill :: (DefinerOfRegs r a, UserOfRegs r a) => DynFlags -> a -> CmmLive r -> CmmLive r

removeDeadAssignments :: DynFlags -> CmmGraph -> UniqSM (CmmGraph, BlockEnv CmmLocalLive)