GenArithOpInt should ensure that reg is in core
GenArithOpInt should ensure that reg is in core

GenArithOpInt in two-addr case of add-int where destination is in
register should ensure that it is a core reg.

Change-Id: I5b5ca126773a2bb45f9b23ad892102b034d694b4
Signed-off-by: Serguei Katkov <53c1eb3349c33a81de4c7fece05dd168a3eb410e@intel.com>

treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst