[Bug c++/79796] [5/6/7 Regression] ICE with NSDMI and this pointer

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79796

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
gimplify_expr can't stomach <PLACEHOLDER_EXPR struct A> created in get_nsdmi. 
Wait, there's a dup or at least a very similar PR.