An identifier for a primitive real machine register.
Moduleghc-lib-parser-9.14.1.20251220GHC2021
GHC.Platform.Reg
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.
- 4 types
- 13 values
- Packageghc-lib-parser-9.14.1.20251220
- Exports17
- LanguageGHC2021
- LicenceBSD-3-Clause
- SourceReg.hs
A register, either virtual or real
Constructors
Instances5Eq, Ord, Show, Uniquable, Outputable
Eq RegDefined in ghc-lib-parser-9.14.1.20251220 · GHC.Platform.RegOrd RegDefined in ghc-lib-parser-9.14.1.20251220 · GHC.Platform.RegShow RegDefined in ghc-lib-parser-9.14.1.20251220 · GHC.Platform.RegUniquable RegDefined in ghc-lib-parser-9.14.1.20251220 · GHC.Platform.RegOutputable RegDefined in ghc-lib-parser-9.14.1.20251220 · GHC.Platform.RegPrint a reg in a generic manner If you want the architecture specific names, then use the pprReg function from the appropriate Ppr module.
Constructors
VirtualRegIInteger virtual register
VirtualRegHiHigh part of 2-word virtual register
VirtualRegDDouble virtual register
VirtualRegV128128-bit wide vector virtual register
Instances5Eq, Ord, Show, Uniquable, Outputable
Eq VirtualRegDefined in ghc-lib-parser-9.14.1.20251220 · GHC.Platform.RegOrd VirtualRegDefined in ghc-lib-parser-9.14.1.20251220 · GHC.Platform.RegShow VirtualRegDefined in ghc-lib-parser-9.14.1.20251220 · GHC.Platform.RegUniquable VirtualRegDefined in ghc-lib-parser-9.14.1.20251220 · GHC.Platform.RegOutputable VirtualRegDefined in ghc-lib-parser-9.14.1.20251220 · GHC.Platform.Reg
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.
Constructors
Instances5Eq, Ord, Show, Uniquable, Outputable
Eq RealRegDefined in ghc-lib-parser-9.14.1.20251220 · GHC.Platform.RegOrd RealRegDefined in ghc-lib-parser-9.14.1.20251220 · GHC.Platform.RegShow RealRegDefined in ghc-lib-parser-9.14.1.20251220 · GHC.Platform.RegUniquable RealRegDefined in ghc-lib-parser-9.14.1.20251220 · GHC.Platform.RegOutputable RealRegDefined in ghc-lib-parser-9.14.1.20251220 · GHC.Platform.Reg
The patch function supplied by the allocator maps VirtualReg to RealReg regs, but sometimes we want to apply it to plain old Reg.