Macro impl_internal_sve_predicate
macro_rules! impl_internal_sve_predicate {
($(($name:ident, $elt:literal))*) => { ... };
}LLVM requires the predicate lane count to be the same as the lane count
it's working with. However the ACLE only defines one bool type and the
instruction set doesn't have this distinction. As a result we have to
create these internal types so we can match the LLVM signature. Each of
these internal types can be converted to the public svbool_t type and
the svbool_t type can be converted into these.