Safe Haskell	None
Language	Haskell2010

Reg

Description

An architecture independent description of a register. This needs to stay architecture independent because it is used by NCGMonad and the register allocators, which are shared by all architectures.

Synopsis

Documentation

type RegNo = Int Source #

An identifier for a primitive real machine register.

data Reg Source #

A register, either virtual or real

Constructors

RegVirtual !VirtualReg
RegReal !RealReg

Instances

Eq Reg Source #
Methods (==) :: Reg -> Reg -> Bool # (/=) :: Reg -> Reg -> Bool #
Ord Reg Source #
Methods compare :: Reg -> Reg -> Ordering # (<) :: Reg -> Reg -> Bool # (<=) :: Reg -> Reg -> Bool # (>) :: Reg -> Reg -> Bool # (>=) :: Reg -> Reg -> Bool # max :: Reg -> Reg -> Reg # min :: Reg -> Reg -> Reg #
Outputable Reg Source #	Print a reg in a generic manner If you want the architecture specific names, then use the pprReg function from the appropriate Ppr module.
Methods ppr :: Reg -> SDoc Source # pprPrec :: Rational -> Reg -> SDoc Source #
Uniquable Reg Source #
Methods getUnique :: Reg -> Unique Source #

regPair :: RegNo -> RegNo -> Reg Source #

regSingle :: RegNo -> Reg Source #

isRealReg :: Reg -> Bool Source #

takeRealReg :: Reg -> Maybe RealReg Source #

isVirtualReg :: Reg -> Bool Source #

takeVirtualReg :: Reg -> Maybe VirtualReg Source #

data VirtualReg Source #

Constructors

VirtualRegI !Unique
VirtualRegHi !Unique
VirtualRegF !Unique
VirtualRegD !Unique
VirtualRegSSE !Unique

Instances

Eq VirtualReg Source #
Methods (==) :: VirtualReg -> VirtualReg -> Bool # (/=) :: VirtualReg -> VirtualReg -> Bool #
Ord VirtualReg Source #
Methods compare :: VirtualReg -> VirtualReg -> Ordering # (<) :: VirtualReg -> VirtualReg -> Bool # (<=) :: VirtualReg -> VirtualReg -> Bool # (>) :: VirtualReg -> VirtualReg -> Bool # (>=) :: VirtualReg -> VirtualReg -> Bool # max :: VirtualReg -> VirtualReg -> VirtualReg # min :: VirtualReg -> VirtualReg -> VirtualReg #
Show VirtualReg Source #
Methods showsPrec :: Int -> VirtualReg -> ShowS # show :: VirtualReg -> String # showList :: [VirtualReg] -> ShowS #
Outputable VirtualReg Source #
Methods ppr :: VirtualReg -> SDoc Source # pprPrec :: Rational -> VirtualReg -> SDoc Source #
Uniquable VirtualReg Source #
Methods getUnique :: VirtualReg -> Unique Source #

renameVirtualReg :: Unique -> VirtualReg -> VirtualReg Source #

classOfVirtualReg :: VirtualReg -> RegClass Source #

getHiVirtualRegFromLo :: VirtualReg -> VirtualReg Source #

getHiVRegFromLo :: Reg -> Reg Source #

data RealReg Source #

RealRegs are machine regs which are available for allocation, in the usual way. We know what class they are, because that's part of the processor's architecture.

RealRegPairs are pairs of real registers that are allocated together to hold a larger value, such as with Double regs on SPARC.

Constructors

RealRegSingle !RegNo
RealRegPair !RegNo !RegNo

Instances

Eq RealReg Source #
Methods (==) :: RealReg -> RealReg -> Bool # (/=) :: RealReg -> RealReg -> Bool #
Ord RealReg Source #
Methods compare :: RealReg -> RealReg -> Ordering # (<) :: RealReg -> RealReg -> Bool # (<=) :: RealReg -> RealReg -> Bool # (>) :: RealReg -> RealReg -> Bool # (>=) :: RealReg -> RealReg -> Bool # max :: RealReg -> RealReg -> RealReg # min :: RealReg -> RealReg -> RealReg #
Show RealReg Source #
Methods showsPrec :: Int -> RealReg -> ShowS # show :: RealReg -> String # showList :: [RealReg] -> ShowS #
Outputable RealReg Source #
Methods ppr :: RealReg -> SDoc Source # pprPrec :: Rational -> RealReg -> SDoc Source #
Uniquable RealReg Source #
Methods getUnique :: RealReg -> Unique Source #

regNosOfRealReg :: RealReg -> [RegNo] Source #

realRegsAlias :: RealReg -> RealReg -> Bool Source #

liftPatchFnToRegReg :: (VirtualReg -> RealReg) -> Reg -> Reg Source #

The patch function supplied by the allocator maps VirtualReg to RealReg regs, but sometimes we want to apply it to plain old Reg.