[PATCH] ARM: I have a cunning plan (atomics)

[Tim Northover]

>   In general I'm a fan of using IR level passes to do some incremental lowering - especially in cases where it makes sense. Don't know if you want fussy feedback on the actual patch here, but it seems like a good direction to me.

I think that's OK thanks (though if you have any comments I'd love to
hear them). I've committed it as r205525.

Cheers.

Tim.