[Bug middle-end/71002] [6 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
Bug 71002 depends on bug 40135, which changed state.

Bug 40135 Summary: using alias-set zero for union accesses necessary because of 
RTL alias oracle
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=40135

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