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

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=19987
Bug 19987 depends on bug 15826, which changed state.

Bug 15826 Summary: don't use "if" to extract a single bit bit-field.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=15826

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