[LLVMdev] thumb2 has divide instructions

[Bagel]

Anton Korobeynikov wrote:
> Hello
> 
>> Is this necessary?  Since the absence of the predicate causes lowering to
>> expand divides, the pattern should never show up.
> Just to guard codegen bugs. If anything went wrong (when predicates
> will be used) then you'll get nice assertion "cannot yet select".
> 
>> Agreed.  Now how do we get this done?
> Just look how ArmV7A is defined and do something similar...
> 

It's not clear to me how to add the V7m architecture without breaking 
something.  The predicates that use ARMArchEnum assume an ordering.  And V7m is 
a subset of v7a (and of v6t2).  So a strict ordering scheme starts to break down.

I think I'll just enter this in the bug list and let people who understand the 
subtarget implications do the fix.

regards, bagel