[LLVMdev] Two labels around one instruction in Codegen

[Duncan Sands]

> Ok, so it turns out the labels do not have to be just before / after  
> the divide. So we don't have to use the MVT::Flag hackery. However,  
> the second label must be after the divide. I think the solution is to  
> add a trapping version of DIV (and others) and the second label can  
> use its chain value as operand.

How about a new "trapping" SDNode, which you can wrap trapping sdiv
and other instructions in?

D.