ART: Ensure X86 OpRegCopyWide preserves src

X86Mir2Lir::OpRegCopyWide will clobber r_src if it is assigning a value
in an XMM register to a pair of GPRs.  This change introduces a
temporary to preserve the input value.

Change-Id: I02af5174007c9572e597f8efb0da34f21882a3a8
Signed-off-by: Mark Mendell <mark.p.mendell@intel.com>
1 file changed