[Bug c/70604] switch statement optimization creates dead code

[jpoimboe at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70604

--- Comment #1 from Josh Poimboeuf <jpoimboe at redhat dot com> ---
Created attachment 38227
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38227&action=edit
Linux .config