ghc-7.6.3: The GHC API

Safe Haskell | None

RegAlloc.Linear.SPARC.FreeRegs

Description

Free regs map for SPARC

Synopsis

- data FreeRegs = FreeRegs !Word32 !Word32 !Word32
- noFreeRegs :: FreeRegs
- initFreeRegs :: FreeRegs
- getFreeRegs :: RegClass -> FreeRegs -> [RealReg]
- allocateReg :: RealReg -> FreeRegs -> FreeRegs
- releaseReg :: RealReg -> FreeRegs -> FreeRegs
- bitMask :: Int -> Word32
- showFreeRegs :: FreeRegs -> String

# Documentation

data FreeRegs

Constructors

FreeRegs !Word32 !Word32 !Word32 |

Instances

Show FreeRegs |
FR FreeRegs |

noFreeRegs :: FreeRegs

A reg map where no regs are free to be allocated.

initFreeRegs :: FreeRegs

The initial set of free regs.

getFreeRegs :: RegClass -> FreeRegs -> [RealReg]

Get all the free registers of this class.

allocateReg :: RealReg -> FreeRegs -> FreeRegs

Grab a register.

releaseReg :: RealReg -> FreeRegs -> FreeRegs

Release a register from allocation. The register liveness information says that most regs die after a C call, but we still don't want to allocate to some of them.

bitMask :: Int -> Word32

showFreeRegs :: FreeRegs -> String