[Bug middle-end/20623] ICE: fold check: original tree changed by fold with --enable-checking=fold

[pinskia at gcc dot gnu dot org]

-- 
Bug 20623 depends on bug 20931, which changed state.

Bug 20931 Summary: [4.0/4.1 Regression] fold checking failure
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20931

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20623