[Bug middle-end/19807] fold does not fold &a[4]-1

[rguenth at gcc dot gnu dot org]

-- 
Bug 19807 depends on bug 21082, which changed state.

Bug 21082 Summary: &a[b] - &a[c] is not folded to b - c
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21082

           What    |Old Value                   |New Value
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19807