RegAlloc.Linear.State

State monad for the linear register allocator.

Documentation

data RA_State freeRegs

The register allocator state

Constructors

RA_State

Fields

• ra_blockassig :: BlockAssignment freeRegs

  the current mapping from basic blocks to the register assignments at the beginning of that block.

• ra_freeregs :: !freeRegs

  free machine registers

• ra_assig :: RegMap Loc

  assignment of temps to locations

• ra_delta :: Int

  current stack delta

• ra_stack :: StackMap

  free stack slots for spilling

• ra_us :: UniqSupply

  unique supply for generating names for join point fixup blocks.

• ra_spills :: [SpillReason]

  Record why things were spilled, for -ddrop-asm-stats. Just keep a list here instead of a map of regs -> reasons. We don't want to slow down the allocator if we're not going to emit the stats.

• ra_DynFlags :: DynFlags

data RegM freeRegs a

The register allocator monad type.

Instances

Monad (RegM freeRegs)

Methods

(>>=) :: RegM freeRegs a -> (a -> RegM freeRegs b) -> RegM freeRegs b

(>>) :: RegM freeRegs a -> RegM freeRegs b -> RegM freeRegs b

return :: a -> RegM freeRegs a

fail :: String -> RegM freeRegs a

Functor (RegM freeRegs)

Methods

fmap :: (a -> b) -> RegM freeRegs a -> RegM freeRegs b

(<$) :: a -> RegM freeRegs b -> RegM freeRegs a

Applicative (RegM freeRegs)

Methods

pure :: a -> RegM freeRegs a

(<*>) :: RegM freeRegs (a -> b) -> RegM freeRegs a -> RegM freeRegs b

liftA2 :: (a -> b -> c) -> RegM freeRegs a -> RegM freeRegs b -> RegM freeRegs c

(*>) :: RegM freeRegs a -> RegM freeRegs b -> RegM freeRegs b

(<*) :: RegM freeRegs a -> RegM freeRegs b -> RegM freeRegs a

HasDynFlags (RegM a)

Methods

getDynFlags :: RegM a DynFlags

runR :: DynFlags -> BlockAssignment freeRegs -> freeRegs -> RegMap Loc -> StackMap -> UniqSupply -> RegM freeRegs a -> (BlockAssignment freeRegs, StackMap, RegAllocStats, a)

Run a computation in the RegM register allocator monad.

spillR :: Instruction instr => Reg -> Unique -> RegM freeRegs (instr, Int)

loadR :: Instruction instr => Reg -> Int -> RegM freeRegs instr

getFreeRegsR :: RegM freeRegs freeRegs

setFreeRegsR :: freeRegs -> RegM freeRegs ()

getAssigR :: RegM freeRegs (RegMap Loc)

setAssigR :: RegMap Loc -> RegM freeRegs ()

getBlockAssigR :: RegM freeRegs (BlockAssignment freeRegs)

setBlockAssigR :: BlockAssignment freeRegs -> RegM freeRegs ()

setDeltaR :: Int -> RegM freeRegs ()

getDeltaR :: RegM freeRegs Int

getUniqueR :: RegM freeRegs Unique

recordSpill :: SpillReason -> RegM freeRegs ()

Record that a spill instruction was inserted, for profiling.