[Bug tree-optimization/61964] [4.8/4.9 regression] krb5 database propagation enters infinite loop; reduced test case

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61964
Bug 61964 depends on bug 62030, which changed state.

Bug 62030 Summary: wrong code due to ifcvt merging two stores which have 
different aliasing sets
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62030

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED