It is almost unused, and it is simpler to pass a TCG value directly
to gen_shiftd_rm_T1_T3.  This value is then written to t2 without
going through a temporary register.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NRichard Henderson <rth@twiddle.net>