[Bug c/64279] Warning missing for "(cond) ? A : A" / if(cond) expr1; else expr1; // same expression in if and else branch

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64279

--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I just posted <https://gcc.gnu.org/ml/gcc-patches/2016-10/msg01527.html>, but
given the macro issue, I'm not really sanguine.