[Bug middle-end/71700] [4.9/5/6/7 Regression] wrong code with struct assignment with sub-word signed bitfields

[ktkachov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71700

ktkachov at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2016-06-29
      Known to work|                            |4.8.5
           Assignee|unassigned at gcc dot gnu.org      |ktkachov at gcc dot gnu.org
   Target Milestone|---                         |4.9.5
     Ever confirmed|0                           |1
      Known to fail|                            |4.9.4, 5.4.1, 6.1.0, 7.0

--- Comment #1 from ktkachov at gcc dot gnu.org ---
I'm testing a patch