[Bug debug/84252] [8 Regression] ICE in get_tracked_reg_offset when building libvpx for aarch64

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84252

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 43358
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43358&action=edit
gcc8-pr84252.patch

Full untested fix.