ghc-6.12.2: The GHC API Source code Contents Index

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 Source

Constructors FreeRegs !Word32 !Word32 !Word32 Instances Show FreeRegs

noFreeRegs :: FreeRegs Source

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

initFreeRegs :: FreeRegs Source

The initial set of free regs.

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

Get all the free registers of this class.

allocateReg :: RealReg -> FreeRegs -> FreeRegs Source

Grab a register.

releaseReg :: RealReg -> FreeRegs -> FreeRegs Source

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 Source

showFreeRegs :: FreeRegs -> String Source

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