split low/high register mask in OperandMask
begin converting to setLowHighRegisterMasks
rename RegisterMask to BoundedRegisterMask
remove unused arm utilities / constants
typedef RegisterMask
remove old 32-bit registerMask stuff
typdef Register
typedef Register and RegisterMask in arm
make RegisterMask a class
begin renaming lir:: types
finish renaming lir:: types (fixup arm)
rename lir::Register to lir::RegisterPair
make Register a class
add back NoRegister and remove some implicit int->Register casts
transition x86 registers to Register instances
get rid of implicit Register casts
make BoundedRegisterMask a subclass of RegisterMask
add convenience (1 << lir::Operand::Type::*) shortcuts (lir::Operand::*Mask)