| 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
- type RegNo = Int
- data Reg
- = RegVirtual !VirtualReg
- | RegReal !RealReg
- regPair :: RegNo -> RegNo -> Reg
- regSingle :: RegNo -> Reg
- isRealReg :: Reg -> Bool
- takeRealReg :: Reg -> Maybe RealReg
- isVirtualReg :: Reg -> Bool
- takeVirtualReg :: Reg -> Maybe VirtualReg
- data VirtualReg
- = VirtualRegI !Unique
- | VirtualRegHi !Unique
- | VirtualRegF !Unique
- | VirtualRegD !Unique
- | VirtualRegSSE !Unique
- renameVirtualReg :: Unique -> VirtualReg -> VirtualReg
- classOfVirtualReg :: VirtualReg -> RegClass
- getHiVirtualRegFromLo :: VirtualReg -> VirtualReg
- getHiVRegFromLo :: Reg -> Reg
- data RealReg
- = RealRegSingle !RegNo
- | RealRegPair !RegNo !RegNo
- regNosOfRealReg :: RealReg -> [RegNo]
- realRegsAlias :: RealReg -> RealReg -> Bool
- liftPatchFnToRegReg :: (VirtualReg -> RealReg) -> Reg -> Reg
Documentation
A register, either virtual or real
Instances
Print a reg in a generic manner If you want the architecture specific names, then use the pprReg function from the appropriate Ppr module.
isVirtualReg :: Reg -> Bool Source #
takeVirtualReg :: Reg -> Maybe VirtualReg Source #
data VirtualReg Source #
Constructors
Instances
Instance details
Defined in Reg
Instance details
Defined in Reg
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 #
Instance details
Defined in Reg
Methods
showsPrec :: Int -> VirtualReg -> ShowS #
show :: VirtualReg -> String #
showList :: [VirtualReg] -> ShowS #
renameVirtualReg :: Unique -> VirtualReg -> VirtualReg Source #
getHiVRegFromLo :: Reg -> Reg 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.
regNosOfRealReg :: RealReg -> [RegNo] 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.