[Bug sanitizer/80349] [6/7 Regression] UBSAN: compile time crash with "type mismatch in binary expression" message

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80349

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 41178
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41178&action=edit
gcc7-pr80349.patch

Untested fix.