[Bug middle-end/71002] [6/7 Regression] -fstrict-aliasing breaks Boost's short string optimization implementation

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71002

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2016-05-09
                 CC|                            |rguenth at gcc dot gnu.org
      Known to work|                            |5.3.0
   Target Milestone|---                         |6.2
            Summary|[6 Regression]              |[6/7 Regression]
                   |-fstrict-aliasing breaks    |-fstrict-aliasing breaks
                   |Boost's short string        |Boost's short string
                   |optimization implementation |optimization implementation
     Ever confirmed|0                           |1
      Known to fail|                            |6.1.0

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed the testcase fails with -O2 for GCC 6 and trunk but not GCC 5.