[Bug debug/63284] [4.9/5 Regression] -fcompare-debug issue due to redirection to __builtin_unreachable ()

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63284

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 33507
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33507&action=edit
gcc49-pr63284.patch

Untested fix.