[Bug tree-optimization/53419] loop incorrectly optimized to endless loop at -O2 for table delimited by extern addresses (x86-32)

[gary at intrepid dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53419

--- Comment #7 from Gary Funck <gary at intrepid dot com> 2012-05-19 22:11:42 
UTC ---
(In reply to comment #4)
> Do you have a self-contained run-time testcase?

I wasn't able to create a run-time tester easily, because the code above relies
upon external labels that are interposed at the beginning and end of a table,
via separate compilation and linking.  I can do that, but perhaps given
Andrew's reply, that may be unnecessary.