Nested functions on ARM

[Richard Earnshaw]

nickc@redhat.com said:
> PS.  I noticed that when -mno-sched-prolog is not used it is possible
> for writes into stack slots (via the frame pointer) to be moved into
> the prolog, before the actual slot has been allocated, making ordinary
> code vulnerable to this kind of problem as well.... 

This should have been fixed.  But people keep changing the way the 
aliasing detection works (making it ever more agressive), so it may have 
regressed again.  Can you provide an example that fails?

R.