[Bug middle-end/70843] [7 Regression] ICE in add_expr, at tree.c:7913

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70843

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 38361
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38361&action=edit
gcc7-pr70843.patch

Untested fix.