[Bug c++/99565] New: Bogus identical branches warning when returning references to union members

[johelegp at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99565

            Bug ID: 99565
           Summary: Bogus identical branches warning when returning
                    references to union members
           Product: gcc
           Version: 11.0
               URL: https://godbolt.org/z/9qaz9W
            Status: UNCONFIRMED
          Keywords: diagnostic
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: johelegp at gmail dot com
                CC: johelegp at gmail dot com
  Target Milestone: ---

See https://godbolt.org/z/9qaz9W.
```C++
struct A {
  union {
    int a;
    int b;
  };
  int& x() { return 0 ? a : b; }
};
```