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

[steven at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=19986
Bug 19986 depends on bug 14844, which changed state.

Bug 14844 Summary: [tree-ssa] narrow types if wide result is not needed for unsigned types or when wrapping is true
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=14844

           What    |Removed                     |Added
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             Status|WAITING                     |RESOLVED
         Resolution|---                         |WORKSFORME