Add tests to make sure that the fatal conditions are triggered when met. This commit also moves shift-related death tests to their own DeathTests. Change-Id: Ia610636fe8cf636401e2b2ed623bf20b41147ea4 Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br> Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/42763 Reviewed-by: Gabe Black <gabe.black@gmail.com> Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu> Tested-by: kokoro <noreply+kokoro@google.com>