-fno-tree-cselim not working?

[Andi Kleen]

> I agree that that is most likely an optimization bug that this
> conversion is being for a store to a variable which is not on the
> stack.

Even on the stack it might not be good -- e.g. if someone puts an 10MB 
array on the stack and does something with it you don't want such random
stores inside it because they could be potentially an additional cache miss.

-Andi