ghc-7.8.4: The GHC API

Safe Haskell | None
Language | Haskell98

RegAlloc.Linear.State

Description

State monad for the linear register allocator.

Synopsis

- data RA_State freeRegs = RA_State {
  - ra_blockassig :: BlockAssignment freeRegs
  - ra_freeregs :: !freeRegs
  - ra_assig :: RegMap Loc
  - ra_delta :: Int
  - ra_stack :: StackMap
  - ra_us :: UniqSupply
  - ra_spills :: [SpillReason]
  - ra_DynFlags :: DynFlags
  }
- data RegM freeRegs a
- runR :: DynFlags -> BlockAssignment freeRegs -> freeRegs -> RegMap Loc -> StackMap -> UniqSupply -> RegM freeRegs a -> (BlockAssignment freeRegs, StackMap, RegAllocStats, a)
- 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 ()

# 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) |
Functor (RegM freeRegs) |
Applicative (RegM freeRegs) |
HasDynFlags (RegM a) |

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.