[Bug middle-end/77259] [6/7 Regression] ICE in emit_move_insn since r232167

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77259

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 39461
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39461&action=edit
gcc7-pr77259.patch

Untested fix.