[PATCH] [RFC] Lame fix for PR20376

[Philip Reames]

On 07/22/2014 03:26 AM, Tim Northover wrote:
> We actually do have a last-ditch EFLAGS copy available (though with worrying implications for the red-zone, if we ever start using it). It's used by test/CodeGen/Generic/2011-07-07-ScheduleDAGCrash.ll for example.
Tim, could expand on this point a bit?  I'm unfamiliar with the issue 
you're referring to w.r.t, the red zone comment and it sounds like 
something which might be relevant to know at some point.

This is now completely off topic for the original review of course. :)

Philip