[Bug middle-end/19987] [meta-bug] fold missing optimizations in general

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=19987
Bug 19987 depends on bug 95929, which changed state.

Bug 95929 Summary: Failure to optimize tautological comparisons of comparisons 
to a single one
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95929

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