ghc-9.4.0.20220721: The GHC API

Safe Haskell	Safe-Inferred
Language	Haskell2010

GHC.CmmToAsm.Reg.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_config :: !NCGConfig
- ra_fixups :: [(BlockId, BlockId, BlockId)]
}
data RegM freeRegs a
runR :: NCGConfig -> 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
getConfig :: RegM a NCGConfig
getPlatform :: RegM a Platform
recordSpill :: SpillReason -> RegM freeRegs ()
recordFixupBlock :: BlockId -> BlockId -> BlockId -> RegM freeRegs ()

Documentation

data RA_State freeRegs Source #

The register allocator state

Constructors

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_config :: !NCGConfig
Native code generator configuration
ra_fixups :: [(BlockId, BlockId, BlockId)]
(from,fixup,to) : We inserted fixup code between from and to

data RegM freeRegs a Source #

The register allocator monad type.

Instances

Instances details

Applicative (RegM freeRegs) Source #
Instance details Defined in GHC.CmmToAsm.Reg.Linear.State Methods pure :: a -> RegM freeRegs a Source # (<>) :: RegM freeRegs (a -> b) -> RegM freeRegs a -> RegM freeRegs b Source # liftA2 :: (a -> b -> c) -> RegM freeRegs a -> RegM freeRegs b -> RegM freeRegs c Source # (>) :: RegM freeRegs a -> RegM freeRegs b -> RegM freeRegs b Source # (<*) :: RegM freeRegs a -> RegM freeRegs b -> RegM freeRegs a Source #
Functor (RegM freeRegs) Source #
Instance details Defined in GHC.CmmToAsm.Reg.Linear.State Methods fmap :: (a -> b) -> RegM freeRegs a -> RegM freeRegs b Source # (<$) :: a -> RegM freeRegs b -> RegM freeRegs a Source #
Monad (RegM freeRegs) Source #
Instance details Defined in GHC.CmmToAsm.Reg.Linear.State Methods (>>=) :: RegM freeRegs a -> (a -> RegM freeRegs b) -> RegM freeRegs b Source # (>>) :: RegM freeRegs a -> RegM freeRegs b -> RegM freeRegs b Source # return :: a -> RegM freeRegs a Source #

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

Run a computation in the RegM register allocator monad.

spillR :: Instruction instr => Reg -> Unique -> RegM freeRegs ([instr], Int) Source #

loadR :: Instruction instr => Reg -> Int -> RegM freeRegs [instr] Source #

getFreeRegsR :: RegM freeRegs freeRegs Source #

setFreeRegsR :: freeRegs -> RegM freeRegs () Source #

getAssigR :: RegM freeRegs (RegMap Loc) Source #

setAssigR :: RegMap Loc -> RegM freeRegs () Source #

getBlockAssigR :: RegM freeRegs (BlockAssignment freeRegs) Source #

setBlockAssigR :: BlockAssignment freeRegs -> RegM freeRegs () Source #

setDeltaR :: Int -> RegM freeRegs () Source #

getDeltaR :: RegM freeRegs Int Source #

getUniqueR :: RegM freeRegs Unique Source #

getConfig :: RegM a NCGConfig Source #

Get native code generator configuration

getPlatform :: RegM a Platform Source #

Get target platform from native code generator configuration

recordSpill :: SpillReason -> RegM freeRegs () Source #

Record that a spill instruction was inserted, for profiling.

recordFixupBlock :: BlockId -> BlockId -> BlockId -> RegM freeRegs () Source #

Record a created fixup block