[LLVMdev] thumb2 has divide instructions

[Bagel]

Anton Korobeynikov wrote:
> Hello
> "T2Divide" should be a subtarget feature bit. This way it can be
> "automatically" assigned to the procesor.

I agree this is a better approach.

> The instruction selection patterns for t2{S,U}DIV should be also
> guarded by this predicate.

Is this necessary?  Since the absence of the predicate causes lowering to 
expand divides, the pattern should never show up.

> 
> Also, for cortex-m3 it will be nice to have separate V7M feature profile.
> 

Agreed.  Now how do we get this done?

regards, bagel