This flag was set when some registers were used in x86, but never actually checked by anything. Change-Id: Id0f9847aeca5017455929ab4bbf28210288a3553 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33741 Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com> Maintainer: Gabe Black <gabeblack@google.com>