[PATCH] ARM: allow hints on Cortex-M0 & remove pre-UAL "nop"

[Amara Emerson]

Hi Tim,

> The main controversial point is that it's based on completely removing
> the pre-UAL nop alias (first patch). Keeping it would be possible but
> complicate the predicates, and LLVM doesn't have pre-UAL support as
> any kind of goal.

Do you have an implementation which keeps the nop already? If not, how much
more complex would it be? We'd rather not lose the nop alias for pre-v6t2
users.

Amara