[Bug middle-end/19986] [meta-bug] fold missing optimizations (compared to RTL)

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=19986
Bug 19986 depends on bug 25530, which changed state.

Bug 25530 Summary: (unsigned / 2)*2 is not changed into unsigned &~1
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25530

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